// CodeMirror, copyright (c) by Marijn Haverbeke and others
// Distributed under an MIT license: http://codemirror.net/LICENSE

(function(mod) {
  if (typeof exports == "object" && typeof module == "object") // CommonJS
    mod(require("../../lib/codemirror"));
  else if (typeof define == "function" && define.amd) // AMD
    define(["../../lib/codemirror"], mod);
  else // Plain browser env
    mod(CodeMirror);
})(function(CodeMirror) {
  "use strict";

  CodeMirror.defineOption("fullScreen", false, function(cm, val, old) {
    if (old == CodeMirror.Init) old = false;
    if (!old == !val) return;
    if (val) setFullscreen(cm);
    else setNormal(cm);
  });

  function setFullscreen(cm) {
    var wrap = cm.getWrapperElement();
    cm.state.fullScreenRestore = {scrollTop: window.pageYOffset, scrollLeft: window.pageXOffset,
                                  width: wrap.style.width, height: wrap.style.height};
    wrap.style.width = "";
    wrap.style.height = "auto";
    wrap.className += " CodeMirror-fullscreen";
    document.documentElement.style.overflow = "hidden";
    cm.refresh();
  }

  function setNormal(cm) {
    var wrap = cm.getWrapperElement();
    wrap.className = wrap.className.replace(/\s*CodeMirror-fullscreen\b/, "");
    document.documentElement.style.overflow = "";
    var info = cm.state.fullScreenRestore;
    wrap.style.width = info.width; wrap.style.height = info.height;
    window.scrollTo(info.scrollLeft, info.scrollTop);
    cm.refresh();
  }
});

// CodeMirror, copyright (c) by Marijn Haverbeke and others
// Distributed under an MIT license: http://codemirror.net/LICENSE

(function(mod) {
  if (typeof exports == "object" && typeof module == "object") // CommonJS
    mod(require("../../lib/codemirror"));
  else if (typeof define == "function" && define.amd) // AMD
    define(["../../lib/codemirror"], mod);
  else // Plain browser env
    mod(CodeMirror);
})(function(CodeMirror) {
  CodeMirror.defineExtension("addPanel", function(node, options) {
    options = options || {};

    if (!this.state.panels) initPanels(this);

    var info = this.state.panels;
    var wrapper = info.wrapper;
    var cmWrapper = this.getWrapperElement();

    if (options.after instanceof Panel && !options.after.cleared) {
      wrapper.insertBefore(node, options.before.node.nextSibling);
    } else if (options.before instanceof Panel && !options.before.cleared) {
      wrapper.insertBefore(node, options.before.node);
    } else if (options.replace instanceof Panel && !options.replace.cleared) {
      wrapper.insertBefore(node, options.replace.node);
      options.replace.clear();
    } else if (options.position == "bottom") {
      wrapper.appendChild(node);
    } else if (options.position == "before-bottom") {
      wrapper.insertBefore(node, cmWrapper.nextSibling);
    } else if (options.position == "after-top") {
      wrapper.insertBefore(node, cmWrapper);
    } else {
      wrapper.insertBefore(node, wrapper.firstChild);
    }

    var height = (options && options.height) || node.offsetHeight;
    this._setSize(null, info.heightLeft -= height);
    info.panels++;
    if (options.stable && isAtTop(this, node))
      this.scrollTo(null, this.getScrollInfo().top + height)

    return new Panel(this, node, options, height);
  });

  function Panel(cm, node, options, height) {
    this.cm = cm;
    this.node = node;
    this.options = options;
    this.height = height;
    this.cleared = false;
  }

  Panel.prototype.clear = function() {
    if (this.cleared) return;
    this.cleared = true;
    var info = this.cm.state.panels;
    this.cm._setSize(null, info.heightLeft += this.height);
    if (this.options.stable && isAtTop(this.cm, this.node))
      this.cm.scrollTo(null, this.cm.getScrollInfo().top - this.height)
    info.wrapper.removeChild(this.node);
    if (--info.panels == 0) removePanels(this.cm);
  };

  Panel.prototype.changed = function(height) {
    var newHeight = height == null ? this.node.offsetHeight : height;
    var info = this.cm.state.panels;
    this.cm._setSize(null, info.heightLeft -= (newHeight - this.height));
    this.height = newHeight;
  };

  function initPanels(cm) {
    var wrap = cm.getWrapperElement();
    var style = window.getComputedStyle ? window.getComputedStyle(wrap) : wrap.currentStyle;
    var height = parseInt(style.height);
    var info = cm.state.panels = {
      setHeight: wrap.style.height,
      heightLeft: height,
      panels: 0,
      wrapper: document.createElement("div")
    };
    wrap.parentNode.insertBefore(info.wrapper, wrap);
    var hasFocus = cm.hasFocus();
    info.wrapper.appendChild(wrap);
    if (hasFocus) cm.focus();

    cm._setSize = cm.setSize;
    if (height != null) cm.setSize = function(width, newHeight) {
      if (newHeight == null) return this._setSize(width, newHeight);
      info.setHeight = newHeight;
      if (typeof newHeight != "number") {
        var px = /^(\d+\.?\d*)px$/.exec(newHeight);
        if (px) {
          newHeight = Number(px[1]);
        } else {
          info.wrapper.style.height = newHeight;
          newHeight = info.wrapper.offsetHeight;
          info.wrapper.style.height = "";
        }
      }
      cm._setSize(width, info.heightLeft += (newHeight - height));
      height = newHeight;
    };
  }

  function removePanels(cm) {
    var info = cm.state.panels;
    cm.state.panels = null;

    var wrap = cm.getWrapperElement();
    info.wrapper.parentNode.replaceChild(wrap, info.wrapper);
    wrap.style.height = info.setHeight;
    cm.setSize = cm._setSize;
    cm.setSize();
  }

  function isAtTop(cm, dom) {
    for (var sibling = dom.nextSibling; sibling; sibling = sibling.nextSibling)
      if (sibling == cm.getWrapperElement()) return true
    return false
  }
});

// CodeMirror, copyright (c) by Marijn Haverbeke and others
// Distributed under an MIT license: http://codemirror.net/LICENSE

(function(mod) {
  if (typeof exports == "object" && typeof module == "object") // CommonJS
    mod(require("../../lib/codemirror"));
  else if (typeof define == "function" && define.amd) // AMD
    define(["../../lib/codemirror"], mod);
  else // Plain browser env
    mod(CodeMirror);
})(function(CodeMirror) {
  var defaults = {
    pairs: "()[]{}''\"\"",
    triples: "",
    explode: "[]{}"
  };

  var Pos = CodeMirror.Pos;

  CodeMirror.defineOption("autoCloseBrackets", false, function(cm, val, old) {
    if (old && old != CodeMirror.Init) {
      cm.removeKeyMap(keyMap);
      cm.state.closeBrackets = null;
    }
    if (val) {
      cm.state.closeBrackets = val;
      cm.addKeyMap(keyMap);
    }
  });

  function getOption(conf, name) {
    if (name == "pairs" && typeof conf == "string") return conf;
    if (typeof conf == "object" && conf[name] != null) return conf[name];
    return defaults[name];
  }

  var bind = defaults.pairs + "`";
  var keyMap = {Backspace: handleBackspace, Enter: handleEnter};
  for (var i = 0; i < bind.length; i++)
    keyMap["'" + bind.charAt(i) + "'"] = handler(bind.charAt(i));

  function handler(ch) {
    return function(cm) { return handleChar(cm, ch); };
  }

  function getConfig(cm) {
    var deflt = cm.state.closeBrackets;
    if (!deflt || deflt.override) return deflt;
    var mode = cm.getModeAt(cm.getCursor());
    return mode.closeBrackets || deflt;
  }

  function handleBackspace(cm) {
    var conf = getConfig(cm);
    if (!conf || cm.getOption("disableInput")) return CodeMirror.Pass;

    var pairs = getOption(conf, "pairs");
    var ranges = cm.listSelections();
    for (var i = 0; i < ranges.length; i++) {
      if (!ranges[i].empty()) return CodeMirror.Pass;
      var around = charsAround(cm, ranges[i].head);
      if (!around || pairs.indexOf(around) % 2 != 0) return CodeMirror.Pass;
    }
    for (var i = ranges.length - 1; i >= 0; i--) {
      var cur = ranges[i].head;
      cm.replaceRange("", Pos(cur.line, cur.ch - 1), Pos(cur.line, cur.ch + 1), "+delete");
    }
  }

  function handleEnter(cm) {
    var conf = getConfig(cm);
    var explode = conf && getOption(conf, "explode");
    if (!explode || cm.getOption("disableInput")) return CodeMirror.Pass;

    var ranges = cm.listSelections();
    for (var i = 0; i < ranges.length; i++) {
      if (!ranges[i].empty()) return CodeMirror.Pass;
      var around = charsAround(cm, ranges[i].head);
      if (!around || explode.indexOf(around) % 2 != 0) return CodeMirror.Pass;
    }
    cm.operation(function() {
      cm.replaceSelection("\n\n", null);
      cm.execCommand("goCharLeft");
      ranges = cm.listSelections();
      for (var i = 0; i < ranges.length; i++) {
        var line = ranges[i].head.line;
        cm.indentLine(line, null, true);
        cm.indentLine(line + 1, null, true);
      }
    });
  }

  function contractSelection(sel) {
    var inverted = CodeMirror.cmpPos(sel.anchor, sel.head) > 0;
    return {anchor: new Pos(sel.anchor.line, sel.anchor.ch + (inverted ? -1 : 1)),
            head: new Pos(sel.head.line, sel.head.ch + (inverted ? 1 : -1))};
  }

  function handleChar(cm, ch) {
    var conf = getConfig(cm);
    if (!conf || cm.getOption("disableInput")) return CodeMirror.Pass;

    var pairs = getOption(conf, "pairs");
    var pos = pairs.indexOf(ch);
    if (pos == -1) return CodeMirror.Pass;
    var triples = getOption(conf, "triples");

    var identical = pairs.charAt(pos + 1) == ch;
    var ranges = cm.listSelections();
    var opening = pos % 2 == 0;

    var type;
    for (var i = 0; i < ranges.length; i++) {
      var range = ranges[i], cur = range.head, curType;
      var next = cm.getRange(cur, Pos(cur.line, cur.ch + 1));
      if (opening && !range.empty()) {
        curType = "surround";
      } else if ((identical || !opening) && next == ch) {
        if (identical && stringStartsAfter(cm, cur))
          curType = "both";
        else if (triples.indexOf(ch) >= 0 && cm.getRange(cur, Pos(cur.line, cur.ch + 3)) == ch + ch + ch)
          curType = "skipThree";
        else
          curType = "skip";
      } else if (identical && cur.ch > 1 && triples.indexOf(ch) >= 0 &&
                 cm.getRange(Pos(cur.line, cur.ch - 2), cur) == ch + ch &&
                 (cur.ch <= 2 || cm.getRange(Pos(cur.line, cur.ch - 3), Pos(cur.line, cur.ch - 2)) != ch)) {
        curType = "addFour";
      } else if (identical) {
        if (!CodeMirror.isWordChar(next) && enteringString(cm, cur, ch)) curType = "both";
        else return CodeMirror.Pass;
      } else if (opening && (cm.getLine(cur.line).length == cur.ch ||
                             isClosingBracket(next, pairs) ||
                             /\s/.test(next))) {
        curType = "both";
      } else {
        return CodeMirror.Pass;
      }
      if (!type) type = curType;
      else if (type != curType) return CodeMirror.Pass;
    }

    var left = pos % 2 ? pairs.charAt(pos - 1) : ch;
    var right = pos % 2 ? ch : pairs.charAt(pos + 1);
    cm.operation(function() {
      if (type == "skip") {
        cm.execCommand("goCharRight");
      } else if (type == "skipThree") {
        for (var i = 0; i < 3; i++)
          cm.execCommand("goCharRight");
      } else if (type == "surround") {
        var sels = cm.getSelections();
        for (var i = 0; i < sels.length; i++)
          sels[i] = left + sels[i] + right;
        cm.replaceSelections(sels, "around");
        sels = cm.listSelections().slice();
        for (var i = 0; i < sels.length; i++)
          sels[i] = contractSelection(sels[i]);
        cm.setSelections(sels);
      } else if (type == "both") {
        cm.replaceSelection(left + right, null);
        cm.triggerElectric(left + right);
        cm.execCommand("goCharLeft");
      } else if (type == "addFour") {
        cm.replaceSelection(left + left + left + left, "before");
        cm.execCommand("goCharRight");
      }
    });
  }

  function isClosingBracket(ch, pairs) {
    var pos = pairs.lastIndexOf(ch);
    return pos > -1 && pos % 2 == 1;
  }

  function charsAround(cm, pos) {
    var str = cm.getRange(Pos(pos.line, pos.ch - 1),
                          Pos(pos.line, pos.ch + 1));
    return str.length == 2 ? str : null;
  }

  // Project the token type that will exists after the given char is
  // typed, and use it to determine whether it would cause the start
  // of a string token.
  function enteringString(cm, pos, ch) {
    var line = cm.getLine(pos.line);
    var token = cm.getTokenAt(pos);
    if (/\bstring2?\b/.test(token.type) || stringStartsAfter(cm, pos)) return false;
    var stream = new CodeMirror.StringStream(line.slice(0, pos.ch) + ch + line.slice(pos.ch), 4);
    stream.pos = stream.start = token.start;
    for (;;) {
      var type1 = cm.getMode().token(stream, token.state);
      if (stream.pos >= pos.ch + 1) return /\bstring2?\b/.test(type1);
      stream.start = stream.pos;
    }
  }

  function stringStartsAfter(cm, pos) {
    var token = cm.getTokenAt(Pos(pos.line, pos.ch + 1))
    return /\bstring/.test(token.type) && token.start == pos.ch
  }
});

// CodeMirror, copyright (c) by Marijn Haverbeke and others
// Distributed under an MIT license: http://codemirror.net/LICENSE

/**
 * Tag-closer extension for CodeMirror.
 *
 * This extension adds an "autoCloseTags" option that can be set to
 * either true to get the default behavior, or an object to further
 * configure its behavior.
 *
 * These are supported options:
 *
 * `whenClosing` (default true)
 *   Whether to autoclose when the '/' of a closing tag is typed.
 * `whenOpening` (default true)
 *   Whether to autoclose the tag when the final '>' of an opening
 *   tag is typed.
 * `dontCloseTags` (default is empty tags for HTML, none for XML)
 *   An array of tag names that should not be autoclosed.
 * `indentTags` (default is block tags for HTML, none for XML)
 *   An array of tag names that should, when opened, cause a
 *   blank line to be added inside the tag, and the blank line and
 *   closing line to be indented.
 *
 * See demos/closetag.html for a usage example.
 */

(function(mod) {
  if (typeof exports == "object" && typeof module == "object") // CommonJS
    mod(require("../../lib/codemirror"), require("../fold/xml-fold"));
  else if (typeof define == "function" && define.amd) // AMD
    define(["../../lib/codemirror", "../fold/xml-fold"], mod);
  else // Plain browser env
    mod(CodeMirror);
})(function(CodeMirror) {
  CodeMirror.defineOption("autoCloseTags", false, function(cm, val, old) {
    if (old != CodeMirror.Init && old)
      cm.removeKeyMap("autoCloseTags");
    if (!val) return;
    var map = {name: "autoCloseTags"};
    if (typeof val != "object" || val.whenClosing)
      map["'/'"] = function(cm) { return autoCloseSlash(cm); };
    if (typeof val != "object" || val.whenOpening)
      map["'>'"] = function(cm) { return autoCloseGT(cm); };
    cm.addKeyMap(map);
  });

  var htmlDontClose = ["area", "base", "br", "col", "command", "embed", "hr", "img", "input", "keygen", "link", "meta", "param",
                       "source", "track", "wbr"];
  var htmlIndent = ["applet", "blockquote", "body", "button", "div", "dl", "fieldset", "form", "frameset", "h1", "h2", "h3", "h4",
                    "h5", "h6", "head", "html", "iframe", "layer", "legend", "object", "ol", "p", "select", "table", "ul"];

  function autoCloseGT(cm) {
    if (cm.getOption("disableInput")) return CodeMirror.Pass;
    var ranges = cm.listSelections(), replacements = [];
    for (var i = 0; i < ranges.length; i++) {
      if (!ranges[i].empty()) return CodeMirror.Pass;
      var pos = ranges[i].head, tok = cm.getTokenAt(pos);
      var inner = CodeMirror.innerMode(cm.getMode(), tok.state), state = inner.state;
      if (inner.mode.name != "xml" || !state.tagName) return CodeMirror.Pass;

      var opt = cm.getOption("autoCloseTags"), html = inner.mode.configuration == "html";
      var dontCloseTags = (typeof opt == "object" && opt.dontCloseTags) || (html && htmlDontClose);
      var indentTags = (typeof opt == "object" && opt.indentTags) || (html && htmlIndent);

      var tagName = state.tagName;
      if (tok.end > pos.ch) tagName = tagName.slice(0, tagName.length - tok.end + pos.ch);
      var lowerTagName = tagName.toLowerCase();
      // Don't process the '>' at the end of an end-tag or self-closing tag
      if (!tagName ||
          tok.type == "string" && (tok.end != pos.ch || !/[\"\']/.test(tok.string.charAt(tok.string.length - 1)) || tok.string.length == 1) ||
          tok.type == "tag" && state.type == "closeTag" ||
          tok.string.indexOf("/") == (tok.string.length - 1) || // match something like <someTagName />
          dontCloseTags && indexOf(dontCloseTags, lowerTagName) > -1 ||
          closingTagExists(cm, tagName, pos, state, true))
        return CodeMirror.Pass;

      var indent = indentTags && indexOf(indentTags, lowerTagName) > -1;
      replacements[i] = {indent: indent,
                         text: ">" + (indent ? "\n\n" : "") + "</" + tagName + ">",
                         newPos: indent ? CodeMirror.Pos(pos.line + 1, 0) : CodeMirror.Pos(pos.line, pos.ch + 1)};
    }

    for (var i = ranges.length - 1; i >= 0; i--) {
      var info = replacements[i];
      cm.replaceRange(info.text, ranges[i].head, ranges[i].anchor, "+insert");
      var sel = cm.listSelections().slice(0);
      sel[i] = {head: info.newPos, anchor: info.newPos};
      cm.setSelections(sel);
      if (info.indent) {
        cm.indentLine(info.newPos.line, null, true);
        cm.indentLine(info.newPos.line + 1, null, true);
      }
    }
  }

  function autoCloseCurrent(cm, typingSlash) {
    var ranges = cm.listSelections(), replacements = [];
    var head = typingSlash ? "/" : "</";
    for (var i = 0; i < ranges.length; i++) {
      if (!ranges[i].empty()) return CodeMirror.Pass;
      var pos = ranges[i].head, tok = cm.getTokenAt(pos);
      var inner = CodeMirror.innerMode(cm.getMode(), tok.state), state = inner.state;
      if (typingSlash && (tok.type == "string" || tok.string.charAt(0) != "<" ||
                          tok.start != pos.ch - 1))
        return CodeMirror.Pass;
      // Kludge to get around the fact that we are not in XML mode
      // when completing in JS/CSS snippet in htmlmixed mode. Does not
      // work for other XML embedded languages (there is no general
      // way to go from a mixed mode to its current XML state).
      var replacement;
      if (inner.mode.name != "xml") {
        if (cm.getMode().name == "htmlmixed" && inner.mode.name == "javascript")
          replacement = head + "script";
        else if (cm.getMode().name == "htmlmixed" && inner.mode.name == "css")
          replacement = head + "style";
        else
          return CodeMirror.Pass;
      } else {
        if (!state.context || !state.context.tagName ||
            closingTagExists(cm, state.context.tagName, pos, state))
          return CodeMirror.Pass;
        replacement = head + state.context.tagName;
      }
      if (cm.getLine(pos.line).charAt(tok.end) != ">") replacement += ">";
      replacements[i] = replacement;
    }
    cm.replaceSelections(replacements);
    ranges = cm.listSelections();
    for (var i = 0; i < ranges.length; i++)
      if (i == ranges.length - 1 || ranges[i].head.line < ranges[i + 1].head.line)
        cm.indentLine(ranges[i].head.line);
  }

  function autoCloseSlash(cm) {
    if (cm.getOption("disableInput")) return CodeMirror.Pass;
    return autoCloseCurrent(cm, true);
  }

  CodeMirror.commands.closeTag = function(cm) { return autoCloseCurrent(cm); };

  function indexOf(collection, elt) {
    if (collection.indexOf) return collection.indexOf(elt);
    for (var i = 0, e = collection.length; i < e; ++i)
      if (collection[i] == elt) return i;
    return -1;
  }

  // If xml-fold is loaded, we use its functionality to try and verify
  // whether a given tag is actually unclosed.
  function closingTagExists(cm, tagName, pos, state, newTag) {
    if (!CodeMirror.scanForClosingTag) return false;
    var end = Math.min(cm.lastLine() + 1, pos.line + 500);
    var nextClose = CodeMirror.scanForClosingTag(cm, pos, null, end);
    if (!nextClose || nextClose.tag != tagName) return false;
    var cx = state.context;
    // If the immediate wrapping context contains onCx instances of
    // the same tag, a closing tag only exists if there are at least
    // that many closing tags of that type following.
    for (var onCx = newTag ? 1 : 0; cx && cx.tagName == tagName; cx = cx.prev) ++onCx;
    pos = nextClose.to;
    for (var i = 1; i < onCx; i++) {
      var next = CodeMirror.scanForClosingTag(cm, pos, null, end);
      if (!next || next.tag != tagName) return false;
      pos = next.to;
    }
    return true;
  }
});

// CodeMirror, copyright (c) by Marijn Haverbeke and others
// Distributed under an MIT license: http://codemirror.net/LICENSE

(function(mod) {
  if (typeof exports == "object" && typeof module == "object") // CommonJS
    mod(require("../../lib/codemirror"));
  else if (typeof define == "function" && define.amd) // AMD
    define(["../../lib/codemirror"], mod);
  else // Plain browser env
    mod(CodeMirror);
})(function(CodeMirror) {
  var ie_lt8 = /MSIE \d/.test(navigator.userAgent) &&
    (document.documentMode == null || document.documentMode < 8);

  var Pos = CodeMirror.Pos;

  var matching = {"(": ")>", ")": "(<", "[": "]>", "]": "[<", "{": "}>", "}": "{<"};

  function findMatchingBracket(cm, where, strict, config) {
    var line = cm.getLineHandle(where.line), pos = where.ch - 1;
    var match = (pos >= 0 && matching[line.text.charAt(pos)]) || matching[line.text.charAt(++pos)];
    if (!match) return null;
    var dir = match.charAt(1) == ">" ? 1 : -1;
    if (strict && (dir > 0) != (pos == where.ch)) return null;
    var style = cm.getTokenTypeAt(Pos(where.line, pos + 1));

    var found = scanForBracket(cm, Pos(where.line, pos + (dir > 0 ? 1 : 0)), dir, style || null, config);
    if (found == null) return null;
    return {from: Pos(where.line, pos), to: found && found.pos,
            match: found && found.ch == match.charAt(0), forward: dir > 0};
  }

  // bracketRegex is used to specify which type of bracket to scan
  // should be a regexp, e.g. /[[\]]/
  //
  // Note: If "where" is on an open bracket, then this bracket is ignored.
  //
  // Returns false when no bracket was found, null when it reached
  // maxScanLines and gave up
  function scanForBracket(cm, where, dir, style, config) {
    var maxScanLen = (config && config.maxScanLineLength) || 10000;
    var maxScanLines = (config && config.maxScanLines) || 1000;

    var stack = [];
    var re = config && config.bracketRegex ? config.bracketRegex : /[(){}[\]]/;
    var lineEnd = dir > 0 ? Math.min(where.line + maxScanLines, cm.lastLine() + 1)
                          : Math.max(cm.firstLine() - 1, where.line - maxScanLines);
    for (var lineNo = where.line; lineNo != lineEnd; lineNo += dir) {
      var line = cm.getLine(lineNo);
      if (!line) continue;
      var pos = dir > 0 ? 0 : line.length - 1, end = dir > 0 ? line.length : -1;
      if (line.length > maxScanLen) continue;
      if (lineNo == where.line) pos = where.ch - (dir < 0 ? 1 : 0);
      for (; pos != end; pos += dir) {
        var ch = line.charAt(pos);
        if (re.test(ch) && (style === undefined || cm.getTokenTypeAt(Pos(lineNo, pos + 1)) == style)) {
          var match = matching[ch];
          if ((match.charAt(1) == ">") == (dir > 0)) stack.push(ch);
          else if (!stack.length) return {pos: Pos(lineNo, pos), ch: ch};
          else stack.pop();
        }
      }
    }
    return lineNo - dir == (dir > 0 ? cm.lastLine() : cm.firstLine()) ? false : null;
  }

  function matchBrackets(cm, autoclear, config) {
    // Disable brace matching in long lines, since it'll cause hugely slow updates
    var maxHighlightLen = cm.state.matchBrackets.maxHighlightLineLength || 1000;
    var marks = [], ranges = cm.listSelections();
    for (var i = 0; i < ranges.length; i++) {
      var match = ranges[i].empty() && findMatchingBracket(cm, ranges[i].head, false, config);
      if (match && cm.getLine(match.from.line).length <= maxHighlightLen) {
        var style = match.match ? "CodeMirror-matchingbracket" : "CodeMirror-nonmatchingbracket";
        marks.push(cm.markText(match.from, Pos(match.from.line, match.from.ch + 1), {className: style}));
        if (match.to && cm.getLine(match.to.line).length <= maxHighlightLen)
          marks.push(cm.markText(match.to, Pos(match.to.line, match.to.ch + 1), {className: style}));
      }
    }

    if (marks.length) {
      // Kludge to work around the IE bug from issue #1193, where text
      // input stops going to the textare whever this fires.
      if (ie_lt8 && cm.state.focused) cm.focus();

      var clear = function() {
        cm.operation(function() {
          for (var i = 0; i < marks.length; i++) marks[i].clear();
        });
      };
      if (autoclear) setTimeout(clear, 800);
      else return clear;
    }
  }

  var currentlyHighlighted = null;
  function doMatchBrackets(cm) {
    cm.operation(function() {
      if (currentlyHighlighted) {currentlyHighlighted(); currentlyHighlighted = null;}
      currentlyHighlighted = matchBrackets(cm, false, cm.state.matchBrackets);
    });
  }

  CodeMirror.defineOption("matchBrackets", false, function(cm, val, old) {
    if (old && old != CodeMirror.Init) {
      cm.off("cursorActivity", doMatchBrackets);
      if (currentlyHighlighted) {currentlyHighlighted(); currentlyHighlighted = null;}
    }
    if (val) {
      cm.state.matchBrackets = typeof val == "object" ? val : {};
      cm.on("cursorActivity", doMatchBrackets);
    }
  });

  CodeMirror.defineExtension("matchBrackets", function() {matchBrackets(this, true);});
  CodeMirror.defineExtension("findMatchingBracket", function(pos, strict, config){
    return findMatchingBracket(this, pos, strict, config);
  });
  CodeMirror.defineExtension("scanForBracket", function(pos, dir, style, config){
    return scanForBracket(this, pos, dir, style, config);
  });
});

// CodeMirror, copyright (c) by Marijn Haverbeke and others
// Distributed under an MIT license: http://codemirror.net/LICENSE

(function(mod) {
  if (typeof exports == "object" && typeof module == "object") // CommonJS
    mod(require("../../lib/codemirror"), require("../fold/xml-fold"));
  else if (typeof define == "function" && define.amd) // AMD
    define(["../../lib/codemirror", "../fold/xml-fold"], mod);
  else // Plain browser env
    mod(CodeMirror);
})(function(CodeMirror) {
  "use strict";

  CodeMirror.defineOption("matchTags", false, function(cm, val, old) {
    if (old && old != CodeMirror.Init) {
      cm.off("cursorActivity", doMatchTags);
      cm.off("viewportChange", maybeUpdateMatch);
      clear(cm);
    }
    if (val) {
      cm.state.matchBothTags = typeof val == "object" && val.bothTags;
      cm.on("cursorActivity", doMatchTags);
      cm.on("viewportChange", maybeUpdateMatch);
      doMatchTags(cm);
    }
  });

  function clear(cm) {
    if (cm.state.tagHit) cm.state.tagHit.clear();
    if (cm.state.tagOther) cm.state.tagOther.clear();
    cm.state.tagHit = cm.state.tagOther = null;
  }

  function doMatchTags(cm) {
    cm.state.failedTagMatch = false;
    cm.operation(function() {
      clear(cm);
      if (cm.somethingSelected()) return;
      var cur = cm.getCursor(), range = cm.getViewport();
      range.from = Math.min(range.from, cur.line); range.to = Math.max(cur.line + 1, range.to);
      var match = CodeMirror.findMatchingTag(cm, cur, range);
      if (!match) return;
      if (cm.state.matchBothTags) {
        var hit = match.at == "open" ? match.open : match.close;
        if (hit) cm.state.tagHit = cm.markText(hit.from, hit.to, {className: "CodeMirror-matchingtag"});
      }
      var other = match.at == "close" ? match.open : match.close;
      if (other)
        cm.state.tagOther = cm.markText(other.from, other.to, {className: "CodeMirror-matchingtag"});
      else
        cm.state.failedTagMatch = true;
    });
  }

  function maybeUpdateMatch(cm) {
    if (cm.state.failedTagMatch) doMatchTags(cm);
  }

  CodeMirror.commands.toMatchingTag = function(cm) {
    var found = CodeMirror.findMatchingTag(cm, cm.getCursor());
    if (found) {
      var other = found.at == "close" ? found.open : found.close;
      if (other) cm.extendSelection(other.to, other.from);
    }
  };
});

// CodeMirror, copyright (c) by Marijn Haverbeke and others
// Distributed under an MIT license: http://codemirror.net/LICENSE

(function(mod) {
  if (typeof exports == "object" && typeof module == "object") // CommonJS
    mod(require("../../lib/codemirror"));
  else if (typeof define == "function" && define.amd) // AMD
    define(["../../lib/codemirror"], mod);
  else // Plain browser env
    mod(CodeMirror);
})(function(CodeMirror) {
"use strict";

CodeMirror.registerHelper("fold", "brace", function(cm, start) {
  var line = start.line, lineText = cm.getLine(line);
  var tokenType;

  function findOpening(openCh) {
    for (var at = start.ch, pass = 0;;) {
      var found = at <= 0 ? -1 : lineText.lastIndexOf(openCh, at - 1);
      if (found == -1) {
        if (pass == 1) break;
        pass = 1;
        at = lineText.length;
        continue;
      }
      if (pass == 1 && found < start.ch) break;
      tokenType = cm.getTokenTypeAt(CodeMirror.Pos(line, found + 1));
      if (!/^(comment|string)/.test(tokenType)) return found + 1;
      at = found - 1;
    }
  }

  var startToken = "{", endToken = "}", startCh = findOpening("{");
  if (startCh == null) {
    startToken = "[", endToken = "]";
    startCh = findOpening("[");
  }

  if (startCh == null) return;
  var count = 1, lastLine = cm.lastLine(), end, endCh;
  outer: for (var i = line; i <= lastLine; ++i) {
    var text = cm.getLine(i), pos = i == line ? startCh : 0;
    for (;;) {
      var nextOpen = text.indexOf(startToken, pos), nextClose = text.indexOf(endToken, pos);
      if (nextOpen < 0) nextOpen = text.length;
      if (nextClose < 0) nextClose = text.length;
      pos = Math.min(nextOpen, nextClose);
      if (pos == text.length) break;
      if (cm.getTokenTypeAt(CodeMirror.Pos(i, pos + 1)) == tokenType) {
        if (pos == nextOpen) ++count;
        else if (!--count) { end = i; endCh = pos; break outer; }
      }
      ++pos;
    }
  }
  if (end == null || line == end && endCh == startCh) return;
  return {from: CodeMirror.Pos(line, startCh),
          to: CodeMirror.Pos(end, endCh)};
});

CodeMirror.registerHelper("fold", "import", function(cm, start) {
  function hasImport(line) {
    if (line < cm.firstLine() || line > cm.lastLine()) return null;
    var start = cm.getTokenAt(CodeMirror.Pos(line, 1));
    if (!/\S/.test(start.string)) start = cm.getTokenAt(CodeMirror.Pos(line, start.end + 1));
    if (start.type != "keyword" || start.string != "import") return null;
    // Now find closing semicolon, return its position
    for (var i = line, e = Math.min(cm.lastLine(), line + 10); i <= e; ++i) {
      var text = cm.getLine(i), semi = text.indexOf(";");
      if (semi != -1) return {startCh: start.end, end: CodeMirror.Pos(i, semi)};
    }
  }

  var startLine = start.line, has = hasImport(startLine), prev;
  if (!has || hasImport(startLine - 1) || ((prev = hasImport(startLine - 2)) && prev.end.line == startLine - 1))
    return null;
  for (var end = has.end;;) {
    var next = hasImport(end.line + 1);
    if (next == null) break;
    end = next.end;
  }
  return {from: cm.clipPos(CodeMirror.Pos(startLine, has.startCh + 1)), to: end};
});

CodeMirror.registerHelper("fold", "include", function(cm, start) {
  function hasInclude(line) {
    if (line < cm.firstLine() || line > cm.lastLine()) return null;
    var start = cm.getTokenAt(CodeMirror.Pos(line, 1));
    if (!/\S/.test(start.string)) start = cm.getTokenAt(CodeMirror.Pos(line, start.end + 1));
    if (start.type == "meta" && start.string.slice(0, 8) == "#include") return start.start + 8;
  }

  var startLine = start.line, has = hasInclude(startLine);
  if (has == null || hasInclude(startLine - 1) != null) return null;
  for (var end = startLine;;) {
    var next = hasInclude(end + 1);
    if (next == null) break;
    ++end;
  }
  return {from: CodeMirror.Pos(startLine, has + 1),
          to: cm.clipPos(CodeMirror.Pos(end))};
});

});

// CodeMirror, copyright (c) by Marijn Haverbeke and others
// Distributed under an MIT license: http://codemirror.net/LICENSE

(function(mod) {
  if (typeof exports == "object" && typeof module == "object") // CommonJS
    mod(require("../../lib/codemirror"));
  else if (typeof define == "function" && define.amd) // AMD
    define(["../../lib/codemirror"], mod);
  else // Plain browser env
    mod(CodeMirror);
})(function(CodeMirror) {
  "use strict";

  function doFold(cm, pos, options, force) {
    if (options && options.call) {
      var finder = options;
      options = null;
    } else {
      var finder = getOption(cm, options, "rangeFinder");
    }
    if (typeof pos == "number") pos = CodeMirror.Pos(pos, 0);
    var minSize = getOption(cm, options, "minFoldSize");

    function getRange(allowFolded) {
      var range = finder(cm, pos);
      if (!range || range.to.line - range.from.line < minSize) return null;
      var marks = cm.findMarksAt(range.from);
      for (var i = 0; i < marks.length; ++i) {
        if (marks[i].__isFold && force !== "fold") {
          if (!allowFolded) return null;
          range.cleared = true;
          marks[i].clear();
        }
      }
      return range;
    }

    var range = getRange(true);
    if (getOption(cm, options, "scanUp")) while (!range && pos.line > cm.firstLine()) {
      pos = CodeMirror.Pos(pos.line - 1, 0);
      range = getRange(false);
    }
    if (!range || range.cleared || force === "unfold") return;

    var myWidget = makeWidget(cm, options);
    CodeMirror.on(myWidget, "mousedown", function(e) {
      myRange.clear();
      CodeMirror.e_preventDefault(e);
    });
    var myRange = cm.markText(range.from, range.to, {
      replacedWith: myWidget,
      clearOnEnter: getOption(cm, options, "clearOnEnter"),
      __isFold: true
    });
    myRange.on("clear", function(from, to) {
      CodeMirror.signal(cm, "unfold", cm, from, to);
    });
    CodeMirror.signal(cm, "fold", cm, range.from, range.to);
  }

  function makeWidget(cm, options) {
    var widget = getOption(cm, options, "widget");
    if (typeof widget == "string") {
      var text = document.createTextNode(widget);
      widget = document.createElement("span");
      widget.appendChild(text);
      widget.className = "CodeMirror-foldmarker";
    }
    return widget;
  }

  // Clumsy backwards-compatible interface
  CodeMirror.newFoldFunction = function(rangeFinder, widget) {
    return function(cm, pos) { doFold(cm, pos, {rangeFinder: rangeFinder, widget: widget}); };
  };

  // New-style interface
  CodeMirror.defineExtension("foldCode", function(pos, options, force) {
    doFold(this, pos, options, force);
  });

  CodeMirror.defineExtension("isFolded", function(pos) {
    var marks = this.findMarksAt(pos);
    for (var i = 0; i < marks.length; ++i)
      if (marks[i].__isFold) return true;
  });

  CodeMirror.commands.toggleFold = function(cm) {
    cm.foldCode(cm.getCursor());
  };
  CodeMirror.commands.fold = function(cm) {
    cm.foldCode(cm.getCursor(), null, "fold");
  };
  CodeMirror.commands.unfold = function(cm) {
    cm.foldCode(cm.getCursor(), null, "unfold");
  };
  CodeMirror.commands.foldAll = function(cm) {
    cm.operation(function() {
      for (var i = cm.firstLine(), e = cm.lastLine(); i <= e; i++)
        cm.foldCode(CodeMirror.Pos(i, 0), null, "fold");
    });
  };
  CodeMirror.commands.unfoldAll = function(cm) {
    cm.operation(function() {
      for (var i = cm.firstLine(), e = cm.lastLine(); i <= e; i++)
        cm.foldCode(CodeMirror.Pos(i, 0), null, "unfold");
    });
  };

  CodeMirror.registerHelper("fold", "combine", function() {
    var funcs = Array.prototype.slice.call(arguments, 0);
    return function(cm, start) {
      for (var i = 0; i < funcs.length; ++i) {
        var found = funcs[i](cm, start);
        if (found) return found;
      }
    };
  });

  CodeMirror.registerHelper("fold", "auto", function(cm, start) {
    var helpers = cm.getHelpers(start, "fold");
    for (var i = 0; i < helpers.length; i++) {
      var cur = helpers[i](cm, start);
      if (cur) return cur;
    }
  });

  var defaultOptions = {
    rangeFinder: CodeMirror.fold.auto,
    widget: "\u2194",
    minFoldSize: 0,
    scanUp: false,
    clearOnEnter: true
  };

  CodeMirror.defineOption("foldOptions", null);

  function getOption(cm, options, name) {
    if (options && options[name] !== undefined)
      return options[name];
    var editorOptions = cm.options.foldOptions;
    if (editorOptions && editorOptions[name] !== undefined)
      return editorOptions[name];
    return defaultOptions[name];
  }

  CodeMirror.defineExtension("foldOption", function(options, name) {
    return getOption(this, options, name);
  });
});

// CodeMirror, copyright (c) by Marijn Haverbeke and others
// Distributed under an MIT license: http://codemirror.net/LICENSE

(function(mod) {
  if (typeof exports == "object" && typeof module == "object") // CommonJS
    mod(require("../../lib/codemirror"), require("./foldcode"));
  else if (typeof define == "function" && define.amd) // AMD
    define(["../../lib/codemirror", "./foldcode"], mod);
  else // Plain browser env
    mod(CodeMirror);
})(function(CodeMirror) {
  "use strict";

  CodeMirror.defineOption("foldGutter", false, function(cm, val, old) {
    if (old && old != CodeMirror.Init) {
      cm.clearGutter(cm.state.foldGutter.options.gutter);
      cm.state.foldGutter = null;
      cm.off("gutterClick", onGutterClick);
      cm.off("change", onChange);
      cm.off("viewportChange", onViewportChange);
      cm.off("fold", onFold);
      cm.off("unfold", onFold);
      cm.off("swapDoc", onChange);
    }
    if (val) {
      cm.state.foldGutter = new State(parseOptions(val));
      updateInViewport(cm);
      cm.on("gutterClick", onGutterClick);
      cm.on("change", onChange);
      cm.on("viewportChange", onViewportChange);
      cm.on("fold", onFold);
      cm.on("unfold", onFold);
      cm.on("swapDoc", onChange);
    }
  });

  var Pos = CodeMirror.Pos;

  function State(options) {
    this.options = options;
    this.from = this.to = 0;
  }

  function parseOptions(opts) {
    if (opts === true) opts = {};
    if (opts.gutter == null) opts.gutter = "CodeMirror-foldgutter";
    if (opts.indicatorOpen == null) opts.indicatorOpen = "CodeMirror-foldgutter-open";
    if (opts.indicatorFolded == null) opts.indicatorFolded = "CodeMirror-foldgutter-folded";
    return opts;
  }

  function isFolded(cm, line) {
    var marks = cm.findMarks(Pos(line, 0), Pos(line + 1, 0));
    for (var i = 0; i < marks.length; ++i)
      if (marks[i].__isFold && marks[i].find().from.line == line) return marks[i];
  }

  function marker(spec) {
    if (typeof spec == "string") {
      var elt = document.createElement("div");
      elt.className = spec + " CodeMirror-guttermarker-subtle";
      return elt;
    } else {
      return spec.cloneNode(true);
    }
  }

  function updateFoldInfo(cm, from, to) {
    var opts = cm.state.foldGutter.options, cur = from;
    var minSize = cm.foldOption(opts, "minFoldSize");
    var func = cm.foldOption(opts, "rangeFinder");
    cm.eachLine(from, to, function(line) {
      var mark = null;
      if (isFolded(cm, cur)) {
        mark = marker(opts.indicatorFolded);
      } else {
        var pos = Pos(cur, 0);
        var range = func && func(cm, pos);
        if (range && range.to.line - range.from.line >= minSize)
          mark = marker(opts.indicatorOpen);
      }
      cm.setGutterMarker(line, opts.gutter, mark);
      ++cur;
    });
  }

  function updateInViewport(cm) {
    var vp = cm.getViewport(), state = cm.state.foldGutter;
    if (!state) return;
    cm.operation(function() {
      updateFoldInfo(cm, vp.from, vp.to);
    });
    state.from = vp.from; state.to = vp.to;
  }

  function onGutterClick(cm, line, gutter) {
    var state = cm.state.foldGutter;
    if (!state) return;
    var opts = state.options;
    if (gutter != opts.gutter) return;
    var folded = isFolded(cm, line);
    if (folded) folded.clear();
    else cm.foldCode(Pos(line, 0), opts.rangeFinder);
  }

  function onChange(cm) {
    var state = cm.state.foldGutter;
    if (!state) return;
    var opts = state.options;
    state.from = state.to = 0;
    clearTimeout(state.changeUpdate);
    state.changeUpdate = setTimeout(function() { updateInViewport(cm); }, opts.foldOnChangeTimeSpan || 600);
  }

  function onViewportChange(cm) {
    var state = cm.state.foldGutter;
    if (!state) return;
    var opts = state.options;
    clearTimeout(state.changeUpdate);
    state.changeUpdate = setTimeout(function() {
      var vp = cm.getViewport();
      if (state.from == state.to || vp.from - state.to > 20 || state.from - vp.to > 20) {
        updateInViewport(cm);
      } else {
        cm.operation(function() {
          if (vp.from < state.from) {
            updateFoldInfo(cm, vp.from, state.from);
            state.from = vp.from;
          }
          if (vp.to > state.to) {
            updateFoldInfo(cm, state.to, vp.to);
            state.to = vp.to;
          }
        });
      }
    }, opts.updateViewportTimeSpan || 400);
  }

  function onFold(cm, from) {
    var state = cm.state.foldGutter;
    if (!state) return;
    var line = from.line;
    if (line >= state.from && line < state.to)
      updateFoldInfo(cm, line, line + 1);
  }
});

// CodeMirror, copyright (c) by Marijn Haverbeke and others
// Distributed under an MIT license: http://codemirror.net/LICENSE

(function(mod) {
  if (typeof exports == "object" && typeof module == "object") // CommonJS
    mod(require("../../lib/codemirror"));
  else if (typeof define == "function" && define.amd) // AMD
    define(["../../lib/codemirror"], mod);
  else // Plain browser env
    mod(CodeMirror);
})(function(CodeMirror) {
  "use strict";

  var Pos = CodeMirror.Pos;
  function cmp(a, b) { return a.line - b.line || a.ch - b.ch; }

  var nameStartChar = "A-Z_a-z\\u00C0-\\u00D6\\u00D8-\\u00F6\\u00F8-\\u02FF\\u0370-\\u037D\\u037F-\\u1FFF\\u200C-\\u200D\\u2070-\\u218F\\u2C00-\\u2FEF\\u3001-\\uD7FF\\uF900-\\uFDCF\\uFDF0-\\uFFFD";
  var nameChar = nameStartChar + "\-\:\.0-9\\u00B7\\u0300-\\u036F\\u203F-\\u2040";
  var xmlTagStart = new RegExp("<(/?)([" + nameStartChar + "][" + nameChar + "]*)", "g");

  function Iter(cm, line, ch, range) {
    this.line = line; this.ch = ch;
    this.cm = cm; this.text = cm.getLine(line);
    this.min = range ? Math.max(range.from, cm.firstLine()) : cm.firstLine();
    this.max = range ? Math.min(range.to - 1, cm.lastLine()) : cm.lastLine();
  }

  function tagAt(iter, ch) {
    var type = iter.cm.getTokenTypeAt(Pos(iter.line, ch));
    return type && /\btag\b/.test(type);
  }

  function nextLine(iter) {
    if (iter.line >= iter.max) return;
    iter.ch = 0;
    iter.text = iter.cm.getLine(++iter.line);
    return true;
  }
  function prevLine(iter) {
    if (iter.line <= iter.min) return;
    iter.text = iter.cm.getLine(--iter.line);
    iter.ch = iter.text.length;
    return true;
  }

  function toTagEnd(iter) {
    for (;;) {
      var gt = iter.text.indexOf(">", iter.ch);
      if (gt == -1) { if (nextLine(iter)) continue; else return; }
      if (!tagAt(iter, gt + 1)) { iter.ch = gt + 1; continue; }
      var lastSlash = iter.text.lastIndexOf("/", gt);
      var selfClose = lastSlash > -1 && !/\S/.test(iter.text.slice(lastSlash + 1, gt));
      iter.ch = gt + 1;
      return selfClose ? "selfClose" : "regular";
    }
  }
  function toTagStart(iter) {
    for (;;) {
      var lt = iter.ch ? iter.text.lastIndexOf("<", iter.ch - 1) : -1;
      if (lt == -1) { if (prevLine(iter)) continue; else return; }
      if (!tagAt(iter, lt + 1)) { iter.ch = lt; continue; }
      xmlTagStart.lastIndex = lt;
      iter.ch = lt;
      var match = xmlTagStart.exec(iter.text);
      if (match && match.index == lt) return match;
    }
  }

  function toNextTag(iter) {
    for (;;) {
      xmlTagStart.lastIndex = iter.ch;
      var found = xmlTagStart.exec(iter.text);
      if (!found) { if (nextLine(iter)) continue; else return; }
      if (!tagAt(iter, found.index + 1)) { iter.ch = found.index + 1; continue; }
      iter.ch = found.index + found[0].length;
      return found;
    }
  }
  function toPrevTag(iter) {
    for (;;) {
      var gt = iter.ch ? iter.text.lastIndexOf(">", iter.ch - 1) : -1;
      if (gt == -1) { if (prevLine(iter)) continue; else return; }
      if (!tagAt(iter, gt + 1)) { iter.ch = gt; continue; }
      var lastSlash = iter.text.lastIndexOf("/", gt);
      var selfClose = lastSlash > -1 && !/\S/.test(iter.text.slice(lastSlash + 1, gt));
      iter.ch = gt + 1;
      return selfClose ? "selfClose" : "regular";
    }
  }

  function findMatchingClose(iter, tag) {
    var stack = [];
    for (;;) {
      var next = toNextTag(iter), end, startLine = iter.line, startCh = iter.ch - (next ? next[0].length : 0);
      if (!next || !(end = toTagEnd(iter))) return;
      if (end == "selfClose") continue;
      if (next[1]) { // closing tag
        for (var i = stack.length - 1; i >= 0; --i) if (stack[i] == next[2]) {
          stack.length = i;
          break;
        }
        if (i < 0 && (!tag || tag == next[2])) return {
          tag: next[2],
          from: Pos(startLine, startCh),
          to: Pos(iter.line, iter.ch)
        };
      } else { // opening tag
        stack.push(next[2]);
      }
    }
  }
  function findMatchingOpen(iter, tag) {
    var stack = [];
    for (;;) {
      var prev = toPrevTag(iter);
      if (!prev) return;
      if (prev == "selfClose") { toTagStart(iter); continue; }
      var endLine = iter.line, endCh = iter.ch;
      var start = toTagStart(iter);
      if (!start) return;
      if (start[1]) { // closing tag
        stack.push(start[2]);
      } else { // opening tag
        for (var i = stack.length - 1; i >= 0; --i) if (stack[i] == start[2]) {
          stack.length = i;
          break;
        }
        if (i < 0 && (!tag || tag == start[2])) return {
          tag: start[2],
          from: Pos(iter.line, iter.ch),
          to: Pos(endLine, endCh)
        };
      }
    }
  }

  CodeMirror.registerHelper("fold", "xml", function(cm, start) {
    var iter = new Iter(cm, start.line, 0);
    for (;;) {
      var openTag = toNextTag(iter), end;
      if (!openTag || iter.line != start.line || !(end = toTagEnd(iter))) return;
      if (!openTag[1] && end != "selfClose") {
        var startPos = Pos(iter.line, iter.ch);
        var endPos = findMatchingClose(iter, openTag[2]);
        return endPos && {from: startPos, to: endPos.from};
      }
    }
  });
  CodeMirror.findMatchingTag = function(cm, pos, range) {
    var iter = new Iter(cm, pos.line, pos.ch, range);
    if (iter.text.indexOf(">") == -1 && iter.text.indexOf("<") == -1) return;
    var end = toTagEnd(iter), to = end && Pos(iter.line, iter.ch);
    var start = end && toTagStart(iter);
    if (!end || !start || cmp(iter, pos) > 0) return;
    var here = {from: Pos(iter.line, iter.ch), to: to, tag: start[2]};
    if (end == "selfClose") return {open: here, close: null, at: "open"};

    if (start[1]) { // closing tag
      return {open: findMatchingOpen(iter, start[2]), close: here, at: "close"};
    } else { // opening tag
      iter = new Iter(cm, to.line, to.ch, range);
      return {open: here, close: findMatchingClose(iter, start[2]), at: "open"};
    }
  };

  CodeMirror.findEnclosingTag = function(cm, pos, range, tag) {
    var iter = new Iter(cm, pos.line, pos.ch, range);
    for (;;) {
      var open = findMatchingOpen(iter, tag);
      if (!open) break;
      var forward = new Iter(cm, pos.line, pos.ch, range);
      var close = findMatchingClose(forward, open.tag);
      if (close) return {open: open, close: close};
    }
  };

  // Used by addon/edit/closetag.js
  CodeMirror.scanForClosingTag = function(cm, pos, name, end) {
    var iter = new Iter(cm, pos.line, pos.ch, end ? {from: 0, to: end} : null);
    return findMatchingClose(iter, name);
  };
});

// CodeMirror, copyright (c) by Marijn Haverbeke and others
// Distributed under an MIT license: http://codemirror.net/LICENSE

(function(mod) {
  if (typeof exports == "object" && typeof module == "object") // CommonJS
    mod(require("../../lib/codemirror"), "cjs");
  else if (typeof define == "function" && define.amd) // AMD
    define(["../../lib/codemirror"], function(CM) { mod(CM, "amd"); });
  else // Plain browser env
    mod(CodeMirror, "plain");
})(function(CodeMirror, env) {
  if (!CodeMirror.modeURL) CodeMirror.modeURL = "../mode/%N/%N.js";

  var loading = {};
  function splitCallback(cont, n) {
    var countDown = n;
    return function() { if (--countDown == 0) cont(); };
  }
  function ensureDeps(mode, cont) {
    var deps = CodeMirror.modes[mode].dependencies;
    if (!deps) return cont();
    var missing = [];
    for (var i = 0; i < deps.length; ++i) {
      if (!CodeMirror.modes.hasOwnProperty(deps[i]))
        missing.push(deps[i]);
    }
    if (!missing.length) return cont();
    var split = splitCallback(cont, missing.length);
    for (var i = 0; i < missing.length; ++i)
      CodeMirror.requireMode(missing[i], split);
  }

  CodeMirror.requireMode = function(mode, cont) {
    if (typeof mode != "string") mode = mode.name;
    if (CodeMirror.modes.hasOwnProperty(mode)) return ensureDeps(mode, cont);
    if (loading.hasOwnProperty(mode)) return loading[mode].push(cont);

    var file = CodeMirror.modeURL.replace(/%N/g, mode);
    if (env == "plain") {
      var script = document.createElement("script");
      script.src = file;
      var others = document.getElementsByTagName("script")[0];
      var list = loading[mode] = [cont];
      CodeMirror.on(script, "load", function() {
        ensureDeps(mode, function() {
          for (var i = 0; i < list.length; ++i) list[i]();
        });
      });
      others.parentNode.insertBefore(script, others);
    } else if (env == "cjs") {
      require(file);
      cont();
    } else if (env == "amd") {
      requirejs([file], cont);
    }
  };

  CodeMirror.autoLoadMode = function(instance, mode) {
    if (!CodeMirror.modes.hasOwnProperty(mode))
      CodeMirror.requireMode(mode, function() {
        instance.setOption("mode", instance.getOption("mode"));
      });
  };
});

// CodeMirror, copyright (c) by Marijn Haverbeke and others
// Distributed under an MIT license: http://codemirror.net/LICENSE

(function(mod) {
  if (typeof exports == "object" && typeof module == "object") // CommonJS
    mod(require("../../lib/codemirror"));
  else if (typeof define == "function" && define.amd) // AMD
    define(["../../lib/codemirror"], mod);
  else // Plain browser env
    mod(CodeMirror);
})(function(CodeMirror) {
"use strict";

CodeMirror.multiplexingMode = function(outer /*, others */) {
  // Others should be {open, close, mode [, delimStyle] [, innerStyle]} objects
  var others = Array.prototype.slice.call(arguments, 1);

  function indexOf(string, pattern, from, returnEnd) {
    if (typeof pattern == "string") {
      var found = string.indexOf(pattern, from);
      return returnEnd && found > -1 ? found + pattern.length : found;
    }
    var m = pattern.exec(from ? string.slice(from) : string);
    return m ? m.index + from + (returnEnd ? m[0].length : 0) : -1;
  }

  return {
    startState: function() {
      return {
        outer: CodeMirror.startState(outer),
        innerActive: null,
        inner: null
      };
    },

    copyState: function(state) {
      return {
        outer: CodeMirror.copyState(outer, state.outer),
        innerActive: state.innerActive,
        inner: state.innerActive && CodeMirror.copyState(state.innerActive.mode, state.inner)
      };
    },

    token: function(stream, state) {
      if (!state.innerActive) {
        var cutOff = Infinity, oldContent = stream.string;
        for (var i = 0; i < others.length; ++i) {
          var other = others[i];
          var found = indexOf(oldContent, other.open, stream.pos);
          if (found == stream.pos) {
            if (!other.parseDelimiters) stream.match(other.open);
            state.innerActive = other;
            state.inner = CodeMirror.startState(other.mode, outer.indent ? outer.indent(state.outer, "") : 0);
            return other.delimStyle && (other.delimStyle + " " + other.delimStyle + "-open");
          } else if (found != -1 && found < cutOff) {
            cutOff = found;
          }
        }
        if (cutOff != Infinity) stream.string = oldContent.slice(0, cutOff);
        var outerToken = outer.token(stream, state.outer);
        if (cutOff != Infinity) stream.string = oldContent;
        return outerToken;
      } else {
        var curInner = state.innerActive, oldContent = stream.string;
        if (!curInner.close && stream.sol()) {
          state.innerActive = state.inner = null;
          return this.token(stream, state);
        }
        var found = curInner.close ? indexOf(oldContent, curInner.close, stream.pos, curInner.parseDelimiters) : -1;
        if (found == stream.pos && !curInner.parseDelimiters) {
          stream.match(curInner.close);
          state.innerActive = state.inner = null;
          return curInner.delimStyle && (curInner.delimStyle + " " + curInner.delimStyle + "-close");
        }
        if (found > -1) stream.string = oldContent.slice(0, found);
        var innerToken = curInner.mode.token(stream, state.inner);
        if (found > -1) stream.string = oldContent;

        if (found == stream.pos && curInner.parseDelimiters)
          state.innerActive = state.inner = null;

        if (curInner.innerStyle) {
          if (innerToken) innerToken = innerToken + " " + curInner.innerStyle;
          else innerToken = curInner.innerStyle;
        }

        return innerToken;
      }
    },

    indent: function(state, textAfter) {
      var mode = state.innerActive ? state.innerActive.mode : outer;
      if (!mode.indent) return CodeMirror.Pass;
      return mode.indent(state.innerActive ? state.inner : state.outer, textAfter);
    },

    blankLine: function(state) {
      var mode = state.innerActive ? state.innerActive.mode : outer;
      if (mode.blankLine) {
        mode.blankLine(state.innerActive ? state.inner : state.outer);
      }
      if (!state.innerActive) {
        for (var i = 0; i < others.length; ++i) {
          var other = others[i];
          if (other.open === "\n") {
            state.innerActive = other;
            state.inner = CodeMirror.startState(other.mode, mode.indent ? mode.indent(state.outer, "") : 0);
          }
        }
      } else if (state.innerActive.close === "\n") {
        state.innerActive = state.inner = null;
      }
    },

    electricChars: outer.electricChars,

    innerMode: function(state) {
      return state.inner ? {state: state.inner, mode: state.innerActive.mode} : {state: state.outer, mode: outer};
    }
  };
};

});

// CodeMirror, copyright (c) by Marijn Haverbeke and others
// Distributed under an MIT license: http://codemirror.net/LICENSE

(function(mod) {
  if (typeof exports == "object" && typeof module == "object") // CommonJS
    mod(require("../../lib/codemirror"));
  else if (typeof define == "function" && define.amd) // AMD
    define(["../../lib/codemirror"], mod);
  else // Plain browser env
    mod(CodeMirror);
})(function(CodeMirror) {
  "use strict";

  CodeMirror.defineExtension("annotateScrollbar", function(options) {
    if (typeof options == "string") options = {className: options};
    return new Annotation(this, options);
  });

  CodeMirror.defineOption("scrollButtonHeight", 0);

  function Annotation(cm, options) {
    this.cm = cm;
    this.options = options;
    this.buttonHeight = options.scrollButtonHeight || cm.getOption("scrollButtonHeight");
    this.annotations = [];
    this.doRedraw = this.doUpdate = null;
    this.div = cm.getWrapperElement().appendChild(document.createElement("div"));
    this.div.style.cssText = "position: absolute; right: 0; top: 0; z-index: 7; pointer-events: none";
    this.computeScale();

    function scheduleRedraw(delay) {
      clearTimeout(self.doRedraw);
      self.doRedraw = setTimeout(function() { self.redraw(); }, delay);
    }

    var self = this;
    cm.on("refresh", this.resizeHandler = function() {
      clearTimeout(self.doUpdate);
      self.doUpdate = setTimeout(function() {
        if (self.computeScale()) scheduleRedraw(20);
      }, 100);
    });
    cm.on("markerAdded", this.resizeHandler);
    cm.on("markerCleared", this.resizeHandler);
    if (options.listenForChanges !== false)
      cm.on("change", this.changeHandler = function() {
        scheduleRedraw(250);
      });
  }

  Annotation.prototype.computeScale = function() {
    var cm = this.cm;
    var hScale = (cm.getWrapperElement().clientHeight - cm.display.barHeight - this.buttonHeight * 2) /
      cm.getScrollerElement().scrollHeight
    if (hScale != this.hScale) {
      this.hScale = hScale;
      return true;
    }
  };

  Annotation.prototype.update = function(annotations) {
    this.annotations = annotations;
    this.redraw();
  };

  Annotation.prototype.redraw = function(compute) {
    if (compute !== false) this.computeScale();
    var cm = this.cm, hScale = this.hScale;

    var frag = document.createDocumentFragment(), anns = this.annotations;

    var wrapping = cm.getOption("lineWrapping");
    var singleLineH = wrapping && cm.defaultTextHeight() * 1.5;
    var curLine = null, curLineObj = null;
    function getY(pos, top) {
      if (curLine != pos.line) {
        curLine = pos.line;
        curLineObj = cm.getLineHandle(curLine);
      }
      if ((curLineObj.widgets && curLineObj.widgets.length) ||
          (wrapping && curLineObj.height > singleLineH))
        return cm.charCoords(pos, "local")[top ? "top" : "bottom"];
      var topY = cm.heightAtLine(curLineObj, "local");
      return topY + (top ? 0 : curLineObj.height);
    }

    var lastLine = cm.lastLine()
    if (cm.display.barWidth) for (var i = 0, nextTop; i < anns.length; i++) {
      var ann = anns[i];
      if (ann.to.line > lastLine) continue;
      var top = nextTop || getY(ann.from, true) * hScale;
      var bottom = getY(ann.to, false) * hScale;
      while (i < anns.length - 1) {
        if (anns[i + 1].to.line > lastLine) break;
        nextTop = getY(anns[i + 1].from, true) * hScale;
        if (nextTop > bottom + .9) break;
        ann = anns[++i];
        bottom = getY(ann.to, false) * hScale;
      }
      if (bottom == top) continue;
      var height = Math.max(bottom - top, 3);

      var elt = frag.appendChild(document.createElement("div"));
      elt.style.cssText = "position: absolute; right: 0px; width: " + Math.max(cm.display.barWidth - 1, 2) + "px; top: "
        + (top + this.buttonHeight) + "px; height: " + height + "px";
      elt.className = this.options.className;
      if (ann.id) {
        elt.setAttribute("annotation-id", ann.id);
      }
    }
    this.div.textContent = "";
    this.div.appendChild(frag);
  };

  Annotation.prototype.clear = function() {
    this.cm.off("refresh", this.resizeHandler);
    this.cm.off("markerAdded", this.resizeHandler);
    this.cm.off("markerCleared", this.resizeHandler);
    if (this.changeHandler) this.cm.off("change", this.changeHandler);
    this.div.parentNode.removeChild(this.div);
  };
});

// CodeMirror, copyright (c) by Marijn Haverbeke and others
// Distributed under an MIT license: http://codemirror.net/LICENSE

(function(mod) {
  if (typeof exports == "object" && typeof module == "object") // CommonJS
    mod(require("../../lib/codemirror"));
  else if (typeof define == "function" && define.amd) // AMD
    define(["../../lib/codemirror"], mod);
  else // Plain browser env
    mod(CodeMirror);
})(function(CodeMirror) {
  "use strict";

  function Bar(cls, orientation, scroll) {
    this.orientation = orientation;
    this.scroll = scroll;
    this.screen = this.total = this.size = 1;
    this.pos = 0;

    this.node = document.createElement("div");
    this.node.className = cls + "-" + orientation;
    this.inner = this.node.appendChild(document.createElement("div"));

    var self = this;
    CodeMirror.on(this.inner, "mousedown", function(e) {
      if (e.which != 1) return;
      CodeMirror.e_preventDefault(e);
      var axis = self.orientation == "horizontal" ? "pageX" : "pageY";
      var start = e[axis], startpos = self.pos;
      function done() {
        CodeMirror.off(document, "mousemove", move);
        CodeMirror.off(document, "mouseup", done);
      }
      function move(e) {
        if (e.which != 1) return done();
        self.moveTo(startpos + (e[axis] - start) * (self.total / self.size));
      }
      CodeMirror.on(document, "mousemove", move);
      CodeMirror.on(document, "mouseup", done);
    });

    CodeMirror.on(this.node, "click", function(e) {
      CodeMirror.e_preventDefault(e);
      var innerBox = self.inner.getBoundingClientRect(), where;
      if (self.orientation == "horizontal")
        where = e.clientX < innerBox.left ? -1 : e.clientX > innerBox.right ? 1 : 0;
      else
        where = e.clientY < innerBox.top ? -1 : e.clientY > innerBox.bottom ? 1 : 0;
      self.moveTo(self.pos + where * self.screen);
    });

    function onWheel(e) {
      var moved = CodeMirror.wheelEventPixels(e)[self.orientation == "horizontal" ? "x" : "y"];
      var oldPos = self.pos;
      self.moveTo(self.pos + moved);
      if (self.pos != oldPos) CodeMirror.e_preventDefault(e);
    }
    CodeMirror.on(this.node, "mousewheel", onWheel);
    CodeMirror.on(this.node, "DOMMouseScroll", onWheel);
  }

  Bar.prototype.setPos = function(pos, force) {
    if (pos < 0) pos = 0;
    if (pos > this.total - this.screen) pos = this.total - this.screen;
    if (!force && pos == this.pos) return false;
    this.pos = pos;
    this.inner.style[this.orientation == "horizontal" ? "left" : "top"] =
      (pos * (this.size / this.total)) + "px";
    return true
  };

  Bar.prototype.moveTo = function(pos) {
    if (this.setPos(pos)) this.scroll(pos, this.orientation);
  }

  var minButtonSize = 10;

  Bar.prototype.update = function(scrollSize, clientSize, barSize) {
    var sizeChanged = this.screen != clientSize || this.total != scrollSize || this.size != barSize
    if (sizeChanged) {
      this.screen = clientSize;
      this.total = scrollSize;
      this.size = barSize;
    }

    var buttonSize = this.screen * (this.size / this.total);
    if (buttonSize < minButtonSize) {
      this.size -= minButtonSize - buttonSize;
      buttonSize = minButtonSize;
    }
    this.inner.style[this.orientation == "horizontal" ? "width" : "height"] =
      buttonSize + "px";
    this.setPos(this.pos, sizeChanged);
  };

  function SimpleScrollbars(cls, place, scroll) {
    this.addClass = cls;
    this.horiz = new Bar(cls, "horizontal", scroll);
    place(this.horiz.node);
    this.vert = new Bar(cls, "vertical", scroll);
    place(this.vert.node);
    this.width = null;
  }

  SimpleScrollbars.prototype.update = function(measure) {
    if (this.width == null) {
      var style = window.getComputedStyle ? window.getComputedStyle(this.horiz.node) : this.horiz.node.currentStyle;
      if (style) this.width = parseInt(style.height);
    }
    var width = this.width || 0;

    var needsH = measure.scrollWidth > measure.clientWidth + 1;
    var needsV = measure.scrollHeight > measure.clientHeight + 1;
    this.vert.node.style.display = needsV ? "block" : "none";
    this.horiz.node.style.display = needsH ? "block" : "none";

    if (needsV) {
      this.vert.update(measure.scrollHeight, measure.clientHeight,
                       measure.viewHeight - (needsH ? width : 0));
      this.vert.node.style.bottom = needsH ? width + "px" : "0";
    }
    if (needsH) {
      this.horiz.update(measure.scrollWidth, measure.clientWidth,
                        measure.viewWidth - (needsV ? width : 0) - measure.barLeft);
      this.horiz.node.style.right = needsV ? width + "px" : "0";
      this.horiz.node.style.left = measure.barLeft + "px";
    }

    return {right: needsV ? width : 0, bottom: needsH ? width : 0};
  };

  SimpleScrollbars.prototype.setScrollTop = function(pos) {
    this.vert.setPos(pos);
  };

  SimpleScrollbars.prototype.setScrollLeft = function(pos) {
    this.horiz.setPos(pos);
  };

  SimpleScrollbars.prototype.clear = function() {
    var parent = this.horiz.node.parentNode;
    parent.removeChild(this.horiz.node);
    parent.removeChild(this.vert.node);
  };

  CodeMirror.scrollbarModel.simple = function(place, scroll) {
    return new SimpleScrollbars("CodeMirror-simplescroll", place, scroll);
  };
  CodeMirror.scrollbarModel.overlay = function(place, scroll) {
    return new SimpleScrollbars("CodeMirror-overlayscroll", place, scroll);
  };
});

// CodeMirror, copyright (c) by Marijn Haverbeke and others
// Distributed under an MIT license: http://codemirror.net/LICENSE

(function(mod) {
  if (typeof exports == "object" && typeof module == "object") // CommonJS
    mod(require("../../lib/codemirror"), require("./searchcursor"), require("../scroll/annotatescrollbar"));
  else if (typeof define == "function" && define.amd) // AMD
    define(["../../lib/codemirror", "./searchcursor", "../scroll/annotatescrollbar"], mod);
  else // Plain browser env
    mod(CodeMirror);
})(function(CodeMirror) {
  "use strict";

  CodeMirror.defineExtension("showMatchesOnScrollbar", function(query, caseFold, options) {
    if (typeof options == "string") options = {className: options};
    if (!options) options = {};
    return new SearchAnnotation(this, query, caseFold, options);
  });

  function SearchAnnotation(cm, query, caseFold, options) {
    this.cm = cm;
    this.options = options;
    var annotateOptions = {listenForChanges: false};
    for (var prop in options) annotateOptions[prop] = options[prop];
    if (!annotateOptions.className) annotateOptions.className = "CodeMirror-search-match";
    this.annotation = cm.annotateScrollbar(annotateOptions);
    this.query = query;
    this.caseFold = caseFold;
    this.gap = {from: cm.firstLine(), to: cm.lastLine() + 1};
    this.matches = [];
    this.update = null;

    this.findMatches();
    this.annotation.update(this.matches);

    var self = this;
    cm.on("change", this.changeHandler = function(_cm, change) { self.onChange(change); });
  }

  var MAX_MATCHES = 1000;

  SearchAnnotation.prototype.findMatches = function() {
    if (!this.gap) return;
    for (var i = 0; i < this.matches.length; i++) {
      var match = this.matches[i];
      if (match.from.line >= this.gap.to) break;
      if (match.to.line >= this.gap.from) this.matches.splice(i--, 1);
    }
    var cursor = this.cm.getSearchCursor(this.query, CodeMirror.Pos(this.gap.from, 0), this.caseFold);
    var maxMatches = this.options && this.options.maxMatches || MAX_MATCHES;
    while (cursor.findNext()) {
      var match = {from: cursor.from(), to: cursor.to()};
      if (match.from.line >= this.gap.to) break;
      this.matches.splice(i++, 0, match);
      if (this.matches.length > maxMatches) break;
    }
    this.gap = null;
  };

  function offsetLine(line, changeStart, sizeChange) {
    if (line <= changeStart) return line;
    return Math.max(changeStart, line + sizeChange);
  }

  SearchAnnotation.prototype.onChange = function(change) {
    var startLine = change.from.line;
    var endLine = CodeMirror.changeEnd(change).line;
    var sizeChange = endLine - change.to.line;
    if (this.gap) {
      this.gap.from = Math.min(offsetLine(this.gap.from, startLine, sizeChange), change.from.line);
      this.gap.to = Math.max(offsetLine(this.gap.to, startLine, sizeChange), change.from.line);
    } else {
      this.gap = {from: change.from.line, to: endLine + 1};
    }

    if (sizeChange) for (var i = 0; i < this.matches.length; i++) {
      var match = this.matches[i];
      var newFrom = offsetLine(match.from.line, startLine, sizeChange);
      if (newFrom != match.from.line) match.from = CodeMirror.Pos(newFrom, match.from.ch);
      var newTo = offsetLine(match.to.line, startLine, sizeChange);
      if (newTo != match.to.line) match.to = CodeMirror.Pos(newTo, match.to.ch);
    }
    clearTimeout(this.update);
    var self = this;
    this.update = setTimeout(function() { self.updateAfterChange(); }, 250);
  };

  SearchAnnotation.prototype.updateAfterChange = function() {
    this.findMatches();
    this.annotation.update(this.matches);
  };

  SearchAnnotation.prototype.clear = function() {
    this.cm.off("change", this.changeHandler);
    this.annotation.clear();
  };
});

// CodeMirror, copyright (c) by Marijn Haverbeke and others
// Distributed under an MIT license: http://codemirror.net/LICENSE

// Highlighting text that matches the selection
//
// Defines an option highlightSelectionMatches, which, when enabled,
// will style strings that match the selection throughout the
// document.
//
// The option can be set to true to simply enable it, or to a
// {minChars, style, wordsOnly, showToken, delay} object to explicitly
// configure it. minChars is the minimum amount of characters that should be
// selected for the behavior to occur, and style is the token style to
// apply to the matches. This will be prefixed by "cm-" to create an
// actual CSS class name. If wordsOnly is enabled, the matches will be
// highlighted only if the selected text is a word. showToken, when enabled,
// will cause the current token to be highlighted when nothing is selected.
// delay is used to specify how much time to wait, in milliseconds, before
// highlighting the matches. If annotateScrollbar is enabled, the occurences
// will be highlighted on the scrollbar via the matchesonscrollbar addon.

(function(mod) {
  if (typeof exports == "object" && typeof module == "object") // CommonJS
    mod(require("../../lib/codemirror"), require("./matchesonscrollbar"));
  else if (typeof define == "function" && define.amd) // AMD
    define(["../../lib/codemirror", "./matchesonscrollbar"], mod);
  else // Plain browser env
    mod(CodeMirror);
})(function(CodeMirror) {
  "use strict";

  var defaults = {
    style: "matchhighlight",
    minChars: 2,
    delay: 100,
    wordsOnly: false,
    annotateScrollbar: false,
    showToken: false,
    trim: true
  }

  function State(options) {
    this.options = {}
    for (var name in defaults)
      this.options[name] = (options && options.hasOwnProperty(name) ? options : defaults)[name]
    this.overlay = this.timeout = null;
    this.matchesonscroll = null;
    this.active = false;
  }

  CodeMirror.defineOption("highlightSelectionMatches", false, function(cm, val, old) {
    if (old && old != CodeMirror.Init) {
      removeOverlay(cm);
      clearTimeout(cm.state.matchHighlighter.timeout);
      cm.state.matchHighlighter = null;
      cm.off("cursorActivity", cursorActivity);
      cm.off("focus", onFocus)
    }
    if (val) {
      var state = cm.state.matchHighlighter = new State(val);
      if (cm.hasFocus()) {
        state.active = true
        highlightMatches(cm)
      } else {
        cm.on("focus", onFocus)
      }
      cm.on("cursorActivity", cursorActivity);
    }
  });

  function cursorActivity(cm) {
    var state = cm.state.matchHighlighter;
    if (state.active || cm.hasFocus()) scheduleHighlight(cm, state)
  }

  function onFocus(cm) {
    var state = cm.state.matchHighlighter
    if (!state.active) {
      state.active = true
      scheduleHighlight(cm, state)
    }
  }

  function scheduleHighlight(cm, state) {
    clearTimeout(state.timeout);
    state.timeout = setTimeout(function() {highlightMatches(cm);}, state.options.delay);
  }

  function addOverlay(cm, query, hasBoundary, style) {
    var state = cm.state.matchHighlighter;
    cm.addOverlay(state.overlay = makeOverlay(query, hasBoundary, style));
    if (state.options.annotateScrollbar && cm.showMatchesOnScrollbar) {
      var searchFor = hasBoundary ? new RegExp("\\b" + query + "\\b") : query;
      state.matchesonscroll = cm.showMatchesOnScrollbar(searchFor, false,
        {className: "CodeMirror-selection-highlight-scrollbar"});
    }
  }

  function removeOverlay(cm) {
    var state = cm.state.matchHighlighter;
    if (state.overlay) {
      cm.removeOverlay(state.overlay);
      state.overlay = null;
      if (state.matchesonscroll) {
        state.matchesonscroll.clear();
        state.matchesonscroll = null;
      }
    }
  }

  function highlightMatches(cm) {
    cm.operation(function() {
      var state = cm.state.matchHighlighter;
      removeOverlay(cm);
      if (!cm.somethingSelected() && state.options.showToken) {
        var re = state.options.showToken === true ? /[\w$]/ : state.options.showToken;
        var cur = cm.getCursor(), line = cm.getLine(cur.line), start = cur.ch, end = start;
        while (start && re.test(line.charAt(start - 1))) --start;
        while (end < line.length && re.test(line.charAt(end))) ++end;
        if (start < end)
          addOverlay(cm, line.slice(start, end), re, state.options.style);
        return;
      }
      var from = cm.getCursor("from"), to = cm.getCursor("to");
      if (from.line != to.line) return;
      if (state.options.wordsOnly && !isWord(cm, from, to)) return;
      var selection = cm.getRange(from, to)
      if (state.options.trim) selection = selection.replace(/^\s+|\s+$/g, "")
      if (selection.length >= state.options.minChars)
        addOverlay(cm, selection, false, state.options.style);
    });
  }

  function isWord(cm, from, to) {
    var str = cm.getRange(from, to);
    if (str.match(/^\w+$/) !== null) {
        if (from.ch > 0) {
            var pos = {line: from.line, ch: from.ch - 1};
            var chr = cm.getRange(pos, from);
            if (chr.match(/\W/) === null) return false;
        }
        if (to.ch < cm.getLine(from.line).length) {
            var pos = {line: to.line, ch: to.ch + 1};
            var chr = cm.getRange(to, pos);
            if (chr.match(/\W/) === null) return false;
        }
        return true;
    } else return false;
  }

  function boundariesAround(stream, re) {
    return (!stream.start || !re.test(stream.string.charAt(stream.start - 1))) &&
      (stream.pos == stream.string.length || !re.test(stream.string.charAt(stream.pos)));
  }

  function makeOverlay(query, hasBoundary, style) {
    return {token: function(stream) {
      if (stream.match(query) &&
          (!hasBoundary || boundariesAround(stream, hasBoundary)))
        return style;
      stream.next();
      stream.skipTo(query.charAt(0)) || stream.skipToEnd();
    }};
  }
});

// CodeMirror, copyright (c) by Marijn Haverbeke and others
// Distributed under an MIT license: http://codemirror.net/LICENSE

(function(mod) {
  if (typeof exports == "object" && typeof module == "object") // CommonJS
    mod(require("../../lib/codemirror"));
  else if (typeof define == "function" && define.amd) // AMD
    define(["../../lib/codemirror"], mod);
  else // Plain browser env
    mod(CodeMirror);
})(function(CodeMirror) {
  "use strict";
  var Pos = CodeMirror.Pos;

  function SearchCursor(doc, query, pos, caseFold) {
    this.atOccurrence = false; this.doc = doc;
    if (caseFold == null && typeof query == "string") caseFold = false;

    pos = pos ? doc.clipPos(pos) : Pos(0, 0);
    this.pos = {from: pos, to: pos};

    // The matches method is filled in based on the type of query.
    // It takes a position and a direction, and returns an object
    // describing the next occurrence of the query, or null if no
    // more matches were found.
    if (typeof query != "string") { // Regexp match
      if (!query.global) query = new RegExp(query.source, query.ignoreCase ? "ig" : "g");
      this.matches = function(reverse, pos) {
        if (reverse) {
          query.lastIndex = 0;
          var line = doc.getLine(pos.line).slice(0, pos.ch), cutOff = 0, match, start;
          for (;;) {
            query.lastIndex = cutOff;
            var newMatch = query.exec(line);
            if (!newMatch) break;
            match = newMatch;
            start = match.index;
            cutOff = match.index + (match[0].length || 1);
            if (cutOff == line.length) break;
          }
          var matchLen = (match && match[0].length) || 0;
          if (!matchLen) {
            if (start == 0 && line.length == 0) {match = undefined;}
            else if (start != doc.getLine(pos.line).length) {
              matchLen++;
            }
          }
        } else {
          query.lastIndex = pos.ch;
          var line = doc.getLine(pos.line), match = query.exec(line);
          var matchLen = (match && match[0].length) || 0;
          var start = match && match.index;
          if (start + matchLen != line.length && !matchLen) matchLen = 1;
        }
        if (match && matchLen)
          return {from: Pos(pos.line, start),
                  to: Pos(pos.line, start + matchLen),
                  match: match};
      };
    } else { // String query
      var origQuery = query;
      if (caseFold) query = query.toLowerCase();
      var fold = caseFold ? function(str){return str.toLowerCase();} : function(str){return str;};
      var target = query.split("\n");
      // Different methods for single-line and multi-line queries
      if (target.length == 1) {
        if (!query.length) {
          // Empty string would match anything and never progress, so
          // we define it to match nothing instead.
          this.matches = function() {};
        } else {
          this.matches = function(reverse, pos) {
            if (reverse) {
              var orig = doc.getLine(pos.line).slice(0, pos.ch), line = fold(orig);
              var match = line.lastIndexOf(query);
              if (match > -1) {
                match = adjustPos(orig, line, match);
                return {from: Pos(pos.line, match), to: Pos(pos.line, match + origQuery.length)};
              }
             } else {
               var orig = doc.getLine(pos.line).slice(pos.ch), line = fold(orig);
               var match = line.indexOf(query);
               if (match > -1) {
                 match = adjustPos(orig, line, match) + pos.ch;
                 return {from: Pos(pos.line, match), to: Pos(pos.line, match + origQuery.length)};
               }
            }
          };
        }
      } else {
        var origTarget = origQuery.split("\n");
        this.matches = function(reverse, pos) {
          var last = target.length - 1;
          if (reverse) {
            if (pos.line - (target.length - 1) < doc.firstLine()) return;
            if (fold(doc.getLine(pos.line).slice(0, origTarget[last].length)) != target[target.length - 1]) return;
            var to = Pos(pos.line, origTarget[last].length);
            for (var ln = pos.line - 1, i = last - 1; i >= 1; --i, --ln)
              if (target[i] != fold(doc.getLine(ln))) return;
            var line = doc.getLine(ln), cut = line.length - origTarget[0].length;
            if (fold(line.slice(cut)) != target[0]) return;
            return {from: Pos(ln, cut), to: to};
          } else {
            if (pos.line + (target.length - 1) > doc.lastLine()) return;
            var line = doc.getLine(pos.line), cut = line.length - origTarget[0].length;
            if (fold(line.slice(cut)) != target[0]) return;
            var from = Pos(pos.line, cut);
            for (var ln = pos.line + 1, i = 1; i < last; ++i, ++ln)
              if (target[i] != fold(doc.getLine(ln))) return;
            if (fold(doc.getLine(ln).slice(0, origTarget[last].length)) != target[last]) return;
            return {from: from, to: Pos(ln, origTarget[last].length)};
          }
        };
      }
    }
  }

  SearchCursor.prototype = {
    findNext: function() {return this.find(false);},
    findPrevious: function() {return this.find(true);},

    find: function(reverse) {
      var self = this, pos = this.doc.clipPos(reverse ? this.pos.from : this.pos.to);
      function savePosAndFail(line) {
        var pos = Pos(line, 0);
        self.pos = {from: pos, to: pos};
        self.atOccurrence = false;
        return false;
      }

      for (;;) {
        if (this.pos = this.matches(reverse, pos)) {
          this.atOccurrence = true;
          return this.pos.match || true;
        }
        if (reverse) {
          if (!pos.line) return savePosAndFail(0);
          pos = Pos(pos.line-1, this.doc.getLine(pos.line-1).length);
        }
        else {
          var maxLine = this.doc.lineCount();
          if (pos.line == maxLine - 1) return savePosAndFail(maxLine);
          pos = Pos(pos.line + 1, 0);
        }
      }
    },

    from: function() {if (this.atOccurrence) return this.pos.from;},
    to: function() {if (this.atOccurrence) return this.pos.to;},

    replace: function(newText, origin) {
      if (!this.atOccurrence) return;
      var lines = CodeMirror.splitLines(newText);
      this.doc.replaceRange(lines, this.pos.from, this.pos.to, origin);
      this.pos.to = Pos(this.pos.from.line + lines.length - 1,
                        lines[lines.length - 1].length + (lines.length == 1 ? this.pos.from.ch : 0));
    }
  };

  // Maps a position in a case-folded line back to a position in the original line
  // (compensating for codepoints increasing in number during folding)
  function adjustPos(orig, folded, pos) {
    if (orig.length == folded.length) return pos;
    for (var pos1 = Math.min(pos, orig.length);;) {
      var len1 = orig.slice(0, pos1).toLowerCase().length;
      if (len1 < pos) ++pos1;
      else if (len1 > pos) --pos1;
      else return pos1;
    }
  }

  CodeMirror.defineExtension("getSearchCursor", function(query, pos, caseFold) {
    return new SearchCursor(this.doc, query, pos, caseFold);
  });
  CodeMirror.defineDocExtension("getSearchCursor", function(query, pos, caseFold) {
    return new SearchCursor(this, query, pos, caseFold);
  });

  CodeMirror.defineExtension("selectMatches", function(query, caseFold) {
    var ranges = [];
    var cur = this.getSearchCursor(query, this.getCursor("from"), caseFold);
    while (cur.findNext()) {
      if (CodeMirror.cmpPos(cur.to(), this.getCursor("to")) > 0) break;
      ranges.push({anchor: cur.from(), head: cur.to()});
    }
    if (ranges.length)
      this.setSelections(ranges, 0);
  });
});

// CodeMirror, copyright (c) by Marijn Haverbeke and others
// Distributed under an MIT license: http://codemirror.net/LICENSE

(function(mod) {
  if (typeof exports == "object" && typeof module == "object") // CommonJS
    mod(require("../../lib/codemirror"));
  else if (typeof define == "function" && define.amd) // AMD
    define(["../../lib/codemirror"], mod);
  else // Plain browser env
    mod(CodeMirror);
})(function(CodeMirror) {
  "use strict";
  var WRAP_CLASS = "CodeMirror-activeline";
  var BACK_CLASS = "CodeMirror-activeline-background";
  var GUTT_CLASS = "CodeMirror-activeline-gutter";

  CodeMirror.defineOption("styleActiveLine", false, function(cm, val, old) {
    var prev = old == CodeMirror.Init ? false : old;
    if (val == prev) return
    if (prev) {
      cm.off("beforeSelectionChange", selectionChange);
      clearActiveLines(cm);
      delete cm.state.activeLines;
    }
    if (val) {
      cm.state.activeLines = [];
      updateActiveLines(cm, cm.listSelections());
      cm.on("beforeSelectionChange", selectionChange);
    }
  });

  function clearActiveLines(cm) {
    for (var i = 0; i < cm.state.activeLines.length; i++) {
      cm.removeLineClass(cm.state.activeLines[i], "wrap", WRAP_CLASS);
      cm.removeLineClass(cm.state.activeLines[i], "background", BACK_CLASS);
      cm.removeLineClass(cm.state.activeLines[i], "gutter", GUTT_CLASS);
    }
  }

  function sameArray(a, b) {
    if (a.length != b.length) return false;
    for (var i = 0; i < a.length; i++)
      if (a[i] != b[i]) return false;
    return true;
  }

  function updateActiveLines(cm, ranges) {
    var active = [];
    for (var i = 0; i < ranges.length; i++) {
      var range = ranges[i];
      var option = cm.getOption("styleActiveLine");
      if (typeof option == "object" && option.nonEmpty ? range.anchor.line != range.head.line : !range.empty())
        continue
      var line = cm.getLineHandleVisualStart(range.head.line);
      if (active[active.length - 1] != line) active.push(line);
    }
    if (sameArray(cm.state.activeLines, active)) return;
    cm.operation(function() {
      clearActiveLines(cm);
      for (var i = 0; i < active.length; i++) {
        cm.addLineClass(active[i], "wrap", WRAP_CLASS);
        cm.addLineClass(active[i], "background", BACK_CLASS);
        cm.addLineClass(active[i], "gutter", GUTT_CLASS);
      }
      cm.state.activeLines = active;
    });
  }

  function selectionChange(cm, sel) {
    updateActiveLines(cm, sel.ranges);
  }
});

// CodeMirror, copyright (c) by Marijn Haverbeke and others
// Distributed under an MIT license: http://codemirror.net/LICENSE

/**
 * Supported keybindings:
 *   Too many to list. Refer to defaultKeyMap below.
 *
 * Supported Ex commands:
 *   Refer to defaultExCommandMap below.
 *
 * Registers: unnamed, -, a-z, A-Z, 0-9
 *   (Does not respect the special case for number registers when delete
 *    operator is made with these commands: %, (, ),  , /, ?, n, N, {, } )
 *   TODO: Implement the remaining registers.
 *
 * Marks: a-z, A-Z, and 0-9
 *   TODO: Implement the remaining special marks. They have more complex
 *       behavior.
 *
 * Events:
 *  'vim-mode-change' - raised on the editor anytime the current mode changes,
 *                      Event object: {mode: "visual", subMode: "linewise"}
 *
 * Code structure:
 *  1. Default keymap
 *  2. Variable declarations and short basic helpers
 *  3. Instance (External API) implementation
 *  4. Internal state tracking objects (input state, counter) implementation
 *     and instantiation
 *  5. Key handler (the main command dispatcher) implementation
 *  6. Motion, operator, and action implementations
 *  7. Helper functions for the key handler, motions, operators, and actions
 *  8. Set up Vim to work as a keymap for CodeMirror.
 *  9. Ex command implementations.
 */

(function(mod) {
  if (typeof exports == "object" && typeof module == "object") // CommonJS
    mod(require("../lib/codemirror"), require("../addon/search/searchcursor"), require("../addon/dialog/dialog"), require("../addon/edit/matchbrackets.js"));
  else if (typeof define == "function" && define.amd) // AMD
    define(["../lib/codemirror", "../addon/search/searchcursor", "../addon/dialog/dialog", "../addon/edit/matchbrackets"], mod);
  else // Plain browser env
    mod(CodeMirror);
})(function(CodeMirror) {
  'use strict';

  var defaultKeymap = [
    // Key to key mapping. This goes first to make it possible to override
    // existing mappings.
    { keys: '<Left>', type: 'keyToKey', toKeys: 'h' },
    { keys: '<Right>', type: 'keyToKey', toKeys: 'l' },
    { keys: '<Up>', type: 'keyToKey', toKeys: 'k' },
    { keys: '<Down>', type: 'keyToKey', toKeys: 'j' },
    { keys: '<Space>', type: 'keyToKey', toKeys: 'l' },
    { keys: '<BS>', type: 'keyToKey', toKeys: 'h', context: 'normal'},
    { keys: '<C-Space>', type: 'keyToKey', toKeys: 'W' },
    { keys: '<C-BS>', type: 'keyToKey', toKeys: 'B', context: 'normal' },
    { keys: '<S-Space>', type: 'keyToKey', toKeys: 'w' },
    { keys: '<S-BS>', type: 'keyToKey', toKeys: 'b', context: 'normal' },
    { keys: '<C-n>', type: 'keyToKey', toKeys: 'j' },
    { keys: '<C-p>', type: 'keyToKey', toKeys: 'k' },
    { keys: '<C-[>', type: 'keyToKey', toKeys: '<Esc>' },
    { keys: '<C-c>', type: 'keyToKey', toKeys: '<Esc>' },
    { keys: '<C-[>', type: 'keyToKey', toKeys: '<Esc>', context: 'insert' },
    { keys: '<C-c>', type: 'keyToKey', toKeys: '<Esc>', context: 'insert' },
    { keys: 's', type: 'keyToKey', toKeys: 'cl', context: 'normal' },
    { keys: 's', type: 'keyToKey', toKeys: 'c', context: 'visual'},
    { keys: 'S', type: 'keyToKey', toKeys: 'cc', context: 'normal' },
    { keys: 'S', type: 'keyToKey', toKeys: 'VdO', context: 'visual' },
    { keys: '<Home>', type: 'keyToKey', toKeys: '0' },
    { keys: '<End>', type: 'keyToKey', toKeys: '$' },
    { keys: '<PageUp>', type: 'keyToKey', toKeys: '<C-b>' },
    { keys: '<PageDown>', type: 'keyToKey', toKeys: '<C-f>' },
    { keys: '<CR>', type: 'keyToKey', toKeys: 'j^', context: 'normal' },
    { keys: '<Ins>', type: 'action', action: 'toggleOverwrite', context: 'insert' },
    // Motions
    { keys: 'H', type: 'motion', motion: 'moveToTopLine', motionArgs: { linewise: true, toJumplist: true }},
    { keys: 'M', type: 'motion', motion: 'moveToMiddleLine', motionArgs: { linewise: true, toJumplist: true }},
    { keys: 'L', type: 'motion', motion: 'moveToBottomLine', motionArgs: { linewise: true, toJumplist: true }},
    { keys: 'h', type: 'motion', motion: 'moveByCharacters', motionArgs: { forward: false }},
    { keys: 'l', type: 'motion', motion: 'moveByCharacters', motionArgs: { forward: true }},
    { keys: 'j', type: 'motion', motion: 'moveByLines', motionArgs: { forward: true, linewise: true }},
    { keys: 'k', type: 'motion', motion: 'moveByLines', motionArgs: { forward: false, linewise: true }},
    { keys: 'gj', type: 'motion', motion: 'moveByDisplayLines', motionArgs: { forward: true }},
    { keys: 'gk', type: 'motion', motion: 'moveByDisplayLines', motionArgs: { forward: false }},
    { keys: 'w', type: 'motion', motion: 'moveByWords', motionArgs: { forward: true, wordEnd: false }},
    { keys: 'W', type: 'motion', motion: 'moveByWords', motionArgs: { forward: true, wordEnd: false, bigWord: true }},
    { keys: 'e', type: 'motion', motion: 'moveByWords', motionArgs: { forward: true, wordEnd: true, inclusive: true }},
    { keys: 'E', type: 'motion', motion: 'moveByWords', motionArgs: { forward: true, wordEnd: true, bigWord: true, inclusive: true }},
    { keys: 'b', type: 'motion', motion: 'moveByWords', motionArgs: { forward: false, wordEnd: false }},
    { keys: 'B', type: 'motion', motion: 'moveByWords', motionArgs: { forward: false, wordEnd: false, bigWord: true }},
    { keys: 'ge', type: 'motion', motion: 'moveByWords', motionArgs: { forward: false, wordEnd: true, inclusive: true }},
    { keys: 'gE', type: 'motion', motion: 'moveByWords', motionArgs: { forward: false, wordEnd: true, bigWord: true, inclusive: true }},
    { keys: '{', type: 'motion', motion: 'moveByParagraph', motionArgs: { forward: false, toJumplist: true }},
    { keys: '}', type: 'motion', motion: 'moveByParagraph', motionArgs: { forward: true, toJumplist: true }},
    { keys: '<C-f>', type: 'motion', motion: 'moveByPage', motionArgs: { forward: true }},
    { keys: '<C-b>', type: 'motion', motion: 'moveByPage', motionArgs: { forward: false }},
    { keys: '<C-d>', type: 'motion', motion: 'moveByScroll', motionArgs: { forward: true, explicitRepeat: true }},
    { keys: '<C-u>', type: 'motion', motion: 'moveByScroll', motionArgs: { forward: false, explicitRepeat: true }},
    { keys: 'gg', type: 'motion', motion: 'moveToLineOrEdgeOfDocument', motionArgs: { forward: false, explicitRepeat: true, linewise: true, toJumplist: true }},
    { keys: 'G', type: 'motion', motion: 'moveToLineOrEdgeOfDocument', motionArgs: { forward: true, explicitRepeat: true, linewise: true, toJumplist: true }},
    { keys: '0', type: 'motion', motion: 'moveToStartOfLine' },
    { keys: '^', type: 'motion', motion: 'moveToFirstNonWhiteSpaceCharacter' },
    { keys: '+', type: 'motion', motion: 'moveByLines', motionArgs: { forward: true, toFirstChar:true }},
    { keys: '-', type: 'motion', motion: 'moveByLines', motionArgs: { forward: false, toFirstChar:true }},
    { keys: '_', type: 'motion', motion: 'moveByLines', motionArgs: { forward: true, toFirstChar:true, repeatOffset:-1 }},
    { keys: '$', type: 'motion', motion: 'moveToEol', motionArgs: { inclusive: true }},
    { keys: '%', type: 'motion', motion: 'moveToMatchedSymbol', motionArgs: { inclusive: true, toJumplist: true }},
    { keys: 'f<character>', type: 'motion', motion: 'moveToCharacter', motionArgs: { forward: true , inclusive: true }},
    { keys: 'F<character>', type: 'motion', motion: 'moveToCharacter', motionArgs: { forward: false }},
    { keys: 't<character>', type: 'motion', motion: 'moveTillCharacter', motionArgs: { forward: true, inclusive: true }},
    { keys: 'T<character>', type: 'motion', motion: 'moveTillCharacter', motionArgs: { forward: false }},
    { keys: ';', type: 'motion', motion: 'repeatLastCharacterSearch', motionArgs: { forward: true }},
    { keys: ',', type: 'motion', motion: 'repeatLastCharacterSearch', motionArgs: { forward: false }},
    { keys: '\'<character>', type: 'motion', motion: 'goToMark', motionArgs: {toJumplist: true, linewise: true}},
    { keys: '`<character>', type: 'motion', motion: 'goToMark', motionArgs: {toJumplist: true}},
    { keys: ']`', type: 'motion', motion: 'jumpToMark', motionArgs: { forward: true } },
    { keys: '[`', type: 'motion', motion: 'jumpToMark', motionArgs: { forward: false } },
    { keys: ']\'', type: 'motion', motion: 'jumpToMark', motionArgs: { forward: true, linewise: true } },
    { keys: '[\'', type: 'motion', motion: 'jumpToMark', motionArgs: { forward: false, linewise: true } },
    // the next two aren't motions but must come before more general motion declarations
    { keys: ']p', type: 'action', action: 'paste', isEdit: true, actionArgs: { after: true, isEdit: true, matchIndent: true}},
    { keys: '[p', type: 'action', action: 'paste', isEdit: true, actionArgs: { after: false, isEdit: true, matchIndent: true}},
    { keys: ']<character>', type: 'motion', motion: 'moveToSymbol', motionArgs: { forward: true, toJumplist: true}},
    { keys: '[<character>', type: 'motion', motion: 'moveToSymbol', motionArgs: { forward: false, toJumplist: true}},
    { keys: '|', type: 'motion', motion: 'moveToColumn'},
    { keys: 'o', type: 'motion', motion: 'moveToOtherHighlightedEnd', context:'visual'},
    { keys: 'O', type: 'motion', motion: 'moveToOtherHighlightedEnd', motionArgs: {sameLine: true}, context:'visual'},
    // Operators
    { keys: 'd', type: 'operator', operator: 'delete' },
    { keys: 'y', type: 'operator', operator: 'yank' },
    { keys: 'c', type: 'operator', operator: 'change' },
    { keys: '>', type: 'operator', operator: 'indent', operatorArgs: { indentRight: true }},
    { keys: '<', type: 'operator', operator: 'indent', operatorArgs: { indentRight: false }},
    { keys: 'g~', type: 'operator', operator: 'changeCase' },
    { keys: 'gu', type: 'operator', operator: 'changeCase', operatorArgs: {toLower: true}, isEdit: true },
    { keys: 'gU', type: 'operator', operator: 'changeCase', operatorArgs: {toLower: false}, isEdit: true },
    { keys: 'n', type: 'motion', motion: 'findNext', motionArgs: { forward: true, toJumplist: true }},
    { keys: 'N', type: 'motion', motion: 'findNext', motionArgs: { forward: false, toJumplist: true }},
    // Operator-Motion dual commands
    { keys: 'x', type: 'operatorMotion', operator: 'delete', motion: 'moveByCharacters', motionArgs: { forward: true }, operatorMotionArgs: { visualLine: false }},
    { keys: 'X', type: 'operatorMotion', operator: 'delete', motion: 'moveByCharacters', motionArgs: { forward: false }, operatorMotionArgs: { visualLine: true }},
    { keys: 'D', type: 'operatorMotion', operator: 'delete', motion: 'moveToEol', motionArgs: { inclusive: true }, context: 'normal'},
    { keys: 'D', type: 'operator', operator: 'delete', operatorArgs: { linewise: true }, context: 'visual'},
    { keys: 'Y', type: 'operatorMotion', operator: 'yank', motion: 'expandToLine', motionArgs: { linewise: true }, context: 'normal'},
    { keys: 'Y', type: 'operator', operator: 'yank', operatorArgs: { linewise: true }, context: 'visual'},
    { keys: 'C', type: 'operatorMotion', operator: 'change', motion: 'moveToEol', motionArgs: { inclusive: true }, context: 'normal'},
    { keys: 'C', type: 'operator', operator: 'change', operatorArgs: { linewise: true }, context: 'visual'},
    { keys: '~', type: 'operatorMotion', operator: 'changeCase', motion: 'moveByCharacters', motionArgs: { forward: true }, operatorArgs: { shouldMoveCursor: true }, context: 'normal'},
    { keys: '~', type: 'operator', operator: 'changeCase', context: 'visual'},
    { keys: '<C-w>', type: 'operatorMotion', operator: 'delete', motion: 'moveByWords', motionArgs: { forward: false, wordEnd: false }, context: 'insert' },
    // Actions
    { keys: '<C-i>', type: 'action', action: 'jumpListWalk', actionArgs: { forward: true }},
    { keys: '<C-o>', type: 'action', action: 'jumpListWalk', actionArgs: { forward: false }},
    { keys: '<C-e>', type: 'action', action: 'scroll', actionArgs: { forward: true, linewise: true }},
    { keys: '<C-y>', type: 'action', action: 'scroll', actionArgs: { forward: false, linewise: true }},
    { keys: 'a', type: 'action', action: 'enterInsertMode', isEdit: true, actionArgs: { insertAt: 'charAfter' }, context: 'normal' },
    { keys: 'A', type: 'action', action: 'enterInsertMode', isEdit: true, actionArgs: { insertAt: 'eol' }, context: 'normal' },
    { keys: 'A', type: 'action', action: 'enterInsertMode', isEdit: true, actionArgs: { insertAt: 'endOfSelectedArea' }, context: 'visual' },
    { keys: 'i', type: 'action', action: 'enterInsertMode', isEdit: true, actionArgs: { insertAt: 'inplace' }, context: 'normal' },
    { keys: 'I', type: 'action', action: 'enterInsertMode', isEdit: true, actionArgs: { insertAt: 'firstNonBlank'}, context: 'normal' },
    { keys: 'I', type: 'action', action: 'enterInsertMode', isEdit: true, actionArgs: { insertAt: 'startOfSelectedArea' }, context: 'visual' },
    { keys: 'o', type: 'action', action: 'newLineAndEnterInsertMode', isEdit: true, interlaceInsertRepeat: true, actionArgs: { after: true }, context: 'normal' },
    { keys: 'O', type: 'action', action: 'newLineAndEnterInsertMode', isEdit: true, interlaceInsertRepeat: true, actionArgs: { after: false }, context: 'normal' },
    { keys: 'v', type: 'action', action: 'toggleVisualMode' },
    { keys: 'V', type: 'action', action: 'toggleVisualMode', actionArgs: { linewise: true }},
    { keys: '<C-v>', type: 'action', action: 'toggleVisualMode', actionArgs: { blockwise: true }},
    { keys: '<C-q>', type: 'action', action: 'toggleVisualMode', actionArgs: { blockwise: true }},
    { keys: 'gv', type: 'action', action: 'reselectLastSelection' },
    { keys: 'J', type: 'action', action: 'joinLines', isEdit: true },
    { keys: 'p', type: 'action', action: 'paste', isEdit: true, actionArgs: { after: true, isEdit: true }},
    { keys: 'P', type: 'action', action: 'paste', isEdit: true, actionArgs: { after: false, isEdit: true }},
    { keys: 'r<character>', type: 'action', action: 'replace', isEdit: true },
    { keys: '@<character>', type: 'action', action: 'replayMacro' },
    { keys: 'q<character>', type: 'action', action: 'enterMacroRecordMode' },
    // Handle Replace-mode as a special case of insert mode.
    { keys: 'R', type: 'action', action: 'enterInsertMode', isEdit: true, actionArgs: { replace: true }},
    { keys: 'u', type: 'action', action: 'undo', context: 'normal' },
    { keys: 'u', type: 'operator', operator: 'changeCase', operatorArgs: {toLower: true}, context: 'visual', isEdit: true },
    { keys: 'U', type: 'operator', operator: 'changeCase', operatorArgs: {toLower: false}, context: 'visual', isEdit: true },
    { keys: '<C-r>', type: 'action', action: 'redo' },
    { keys: 'm<character>', type: 'action', action: 'setMark' },
    { keys: '"<character>', type: 'action', action: 'setRegister' },
    { keys: 'zz', type: 'action', action: 'scrollToCursor', actionArgs: { position: 'center' }},
    { keys: 'z.', type: 'action', action: 'scrollToCursor', actionArgs: { position: 'center' }, motion: 'moveToFirstNonWhiteSpaceCharacter' },
    { keys: 'zt', type: 'action', action: 'scrollToCursor', actionArgs: { position: 'top' }},
    { keys: 'z<CR>', type: 'action', action: 'scrollToCursor', actionArgs: { position: 'top' }, motion: 'moveToFirstNonWhiteSpaceCharacter' },
    { keys: 'z-', type: 'action', action: 'scrollToCursor', actionArgs: { position: 'bottom' }},
    { keys: 'zb', type: 'action', action: 'scrollToCursor', actionArgs: { position: 'bottom' }, motion: 'moveToFirstNonWhiteSpaceCharacter' },
    { keys: '.', type: 'action', action: 'repeatLastEdit' },
    { keys: '<C-a>', type: 'action', action: 'incrementNumberToken', isEdit: true, actionArgs: {increase: true, backtrack: false}},
    { keys: '<C-x>', type: 'action', action: 'incrementNumberToken', isEdit: true, actionArgs: {increase: false, backtrack: false}},
    { keys: '<C-t>', type: 'action', action: 'indent', actionArgs: { indentRight: true }, context: 'insert' },
    { keys: '<C-d>', type: 'action', action: 'indent', actionArgs: { indentRight: false }, context: 'insert' },
    // Text object motions
    { keys: 'a<character>', type: 'motion', motion: 'textObjectManipulation' },
    { keys: 'i<character>', type: 'motion', motion: 'textObjectManipulation', motionArgs: { textObjectInner: true }},
    // Search
    { keys: '/', type: 'search', searchArgs: { forward: true, querySrc: 'prompt', toJumplist: true }},
    { keys: '?', type: 'search', searchArgs: { forward: false, querySrc: 'prompt', toJumplist: true }},
    { keys: '*', type: 'search', searchArgs: { forward: true, querySrc: 'wordUnderCursor', wholeWordOnly: true, toJumplist: true }},
    { keys: '#', type: 'search', searchArgs: { forward: false, querySrc: 'wordUnderCursor', wholeWordOnly: true, toJumplist: true }},
    { keys: 'g*', type: 'search', searchArgs: { forward: true, querySrc: 'wordUnderCursor', toJumplist: true }},
    { keys: 'g#', type: 'search', searchArgs: { forward: false, querySrc: 'wordUnderCursor', toJumplist: true }},
    // Ex command
    { keys: ':', type: 'ex' }
  ];

  /**
   * Ex commands
   * Care must be taken when adding to the default Ex command map. For any
   * pair of commands that have a shared prefix, at least one of their
   * shortNames must not match the prefix of the other command.
   */
  var defaultExCommandMap = [
    { name: 'colorscheme', shortName: 'colo' },
    { name: 'map' },
    { name: 'imap', shortName: 'im' },
    { name: 'nmap', shortName: 'nm' },
    { name: 'vmap', shortName: 'vm' },
    { name: 'unmap' },
    { name: 'write', shortName: 'w' },
    { name: 'undo', shortName: 'u' },
    { name: 'redo', shortName: 'red' },
    { name: 'set', shortName: 'se' },
    { name: 'set', shortName: 'se' },
    { name: 'setlocal', shortName: 'setl' },
    { name: 'setglobal', shortName: 'setg' },
    { name: 'sort', shortName: 'sor' },
    { name: 'substitute', shortName: 's', possiblyAsync: true },
    { name: 'nohlsearch', shortName: 'noh' },
    { name: 'yank', shortName: 'y' },
    { name: 'delmarks', shortName: 'delm' },
    { name: 'registers', shortName: 'reg', excludeFromCommandHistory: true },
    { name: 'global', shortName: 'g' }
  ];

  var Pos = CodeMirror.Pos;

  var Vim = function() {
    function enterVimMode(cm) {
      cm.setOption('disableInput', true);
      cm.setOption('showCursorWhenSelecting', false);
      CodeMirror.signal(cm, "vim-mode-change", {mode: "normal"});
      cm.on('cursorActivity', onCursorActivity);
      maybeInitVimState(cm);
      CodeMirror.on(cm.getInputField(), 'paste', getOnPasteFn(cm));
    }

    function leaveVimMode(cm) {
      cm.setOption('disableInput', false);
      cm.off('cursorActivity', onCursorActivity);
      CodeMirror.off(cm.getInputField(), 'paste', getOnPasteFn(cm));
      cm.state.vim = null;
    }

    function detachVimMap(cm, next) {
      if (this == CodeMirror.keyMap.vim)
        CodeMirror.rmClass(cm.getWrapperElement(), "cm-fat-cursor");

      if (!next || next.attach != attachVimMap)
        leaveVimMode(cm, false);
    }
    function attachVimMap(cm, prev) {
      if (this == CodeMirror.keyMap.vim)
        CodeMirror.addClass(cm.getWrapperElement(), "cm-fat-cursor");

      if (!prev || prev.attach != attachVimMap)
        enterVimMode(cm);
    }

    // Deprecated, simply setting the keymap works again.
    CodeMirror.defineOption('vimMode', false, function(cm, val, prev) {
      if (val && cm.getOption("keyMap") != "vim")
        cm.setOption("keyMap", "vim");
      else if (!val && prev != CodeMirror.Init && /^vim/.test(cm.getOption("keyMap")))
        cm.setOption("keyMap", "default");
    });

    function cmKey(key, cm) {
      if (!cm) { return undefined; }
      if (this[key]) { return this[key]; }
      var vimKey = cmKeyToVimKey(key);
      if (!vimKey) {
        return false;
      }
      var cmd = CodeMirror.Vim.findKey(cm, vimKey);
      if (typeof cmd == 'function') {
        CodeMirror.signal(cm, 'vim-keypress', vimKey);
      }
      return cmd;
    }

    var modifiers = {'Shift': 'S', 'Ctrl': 'C', 'Alt': 'A', 'Cmd': 'D', 'Mod': 'A'};
    var specialKeys = {Enter:'CR',Backspace:'BS',Delete:'Del',Insert:'Ins'};
    function cmKeyToVimKey(key) {
      if (key.charAt(0) == '\'') {
        // Keypress character binding of format "'a'"
        return key.charAt(1);
      }
      var pieces = key.split(/-(?!$)/);
      var lastPiece = pieces[pieces.length - 1];
      if (pieces.length == 1 && pieces[0].length == 1) {
        // No-modifier bindings use literal character bindings above. Skip.
        return false;
      } else if (pieces.length == 2 && pieces[0] == 'Shift' && lastPiece.length == 1) {
        // Ignore Shift+char bindings as they should be handled by literal character.
        return false;
      }
      var hasCharacter = false;
      for (var i = 0; i < pieces.length; i++) {
        var piece = pieces[i];
        if (piece in modifiers) { pieces[i] = modifiers[piece]; }
        else { hasCharacter = true; }
        if (piece in specialKeys) { pieces[i] = specialKeys[piece]; }
      }
      if (!hasCharacter) {
        // Vim does not support modifier only keys.
        return false;
      }
      // TODO: Current bindings expect the character to be lower case, but
      // it looks like vim key notation uses upper case.
      if (isUpperCase(lastPiece)) {
        pieces[pieces.length - 1] = lastPiece.toLowerCase();
      }
      return '<' + pieces.join('-') + '>';
    }

    function getOnPasteFn(cm) {
      var vim = cm.state.vim;
      if (!vim.onPasteFn) {
        vim.onPasteFn = function() {
          if (!vim.insertMode) {
            cm.setCursor(offsetCursor(cm.getCursor(), 0, 1));
            actions.enterInsertMode(cm, {}, vim);
          }
        };
      }
      return vim.onPasteFn;
    }

    var numberRegex = /[\d]/;
    var wordCharTest = [CodeMirror.isWordChar, function(ch) {
      return ch && !CodeMirror.isWordChar(ch) && !/\s/.test(ch);
    }], bigWordCharTest = [function(ch) {
      return /\S/.test(ch);
    }];
    function makeKeyRange(start, size) {
      var keys = [];
      for (var i = start; i < start + size; i++) {
        keys.push(String.fromCharCode(i));
      }
      return keys;
    }
    var upperCaseAlphabet = makeKeyRange(65, 26);
    var lowerCaseAlphabet = makeKeyRange(97, 26);
    var numbers = makeKeyRange(48, 10);
    var validMarks = [].concat(upperCaseAlphabet, lowerCaseAlphabet, numbers, ['<', '>']);
    var validRegisters = [].concat(upperCaseAlphabet, lowerCaseAlphabet, numbers, ['-', '"', '.', ':', '/']);

    function isLine(cm, line) {
      return line >= cm.firstLine() && line <= cm.lastLine();
    }
    function isLowerCase(k) {
      return (/^[a-z]$/).test(k);
    }
    function isMatchableSymbol(k) {
      return '()[]{}'.indexOf(k) != -1;
    }
    function isNumber(k) {
      return numberRegex.test(k);
    }
    function isUpperCase(k) {
      return (/^[A-Z]$/).test(k);
    }
    function isWhiteSpaceString(k) {
      return (/^\s*$/).test(k);
    }
    function inArray(val, arr) {
      for (var i = 0; i < arr.length; i++) {
        if (arr[i] == val) {
          return true;
        }
      }
      return false;
    }

    var options = {};
    function defineOption(name, defaultValue, type, aliases, callback) {
      if (defaultValue === undefined && !callback) {
        throw Error('defaultValue is required unless callback is provided');
      }
      if (!type) { type = 'string'; }
      options[name] = {
        type: type,
        defaultValue: defaultValue,
        callback: callback
      };
      if (aliases) {
        for (var i = 0; i < aliases.length; i++) {
          options[aliases[i]] = options[name];
        }
      }
      if (defaultValue) {
        setOption(name, defaultValue);
      }
    }

    function setOption(name, value, cm, cfg) {
      var option = options[name];
      cfg = cfg || {};
      var scope = cfg.scope;
      if (!option) {
        throw Error('Unknown option: ' + name);
      }
      if (option.type == 'boolean') {
        if (value && value !== true) {
          throw Error('Invalid argument: ' + name + '=' + value);
        } else if (value !== false) {
          // Boolean options are set to true if value is not defined.
          value = true;
        }
      }
      if (option.callback) {
        if (scope !== 'local') {
          option.callback(value, undefined);
        }
        if (scope !== 'global' && cm) {
          option.callback(value, cm);
        }
      } else {
        if (scope !== 'local') {
          option.value = option.type == 'boolean' ? !!value : value;
        }
        if (scope !== 'global' && cm) {
          cm.state.vim.options[name] = {value: value};
        }
      }
    }

    function getOption(name, cm, cfg) {
      var option = options[name];
      cfg = cfg || {};
      var scope = cfg.scope;
      if (!option) {
        throw Error('Unknown option: ' + name);
      }
      if (option.callback) {
        var local = cm && option.callback(undefined, cm);
        if (scope !== 'global' && local !== undefined) {
          return local;
        }
        if (scope !== 'local') {
          return option.callback();
        }
        return;
      } else {
        var local = (scope !== 'global') && (cm && cm.state.vim.options[name]);
        return (local || (scope !== 'local') && option || {}).value;
      }
    }

    defineOption('filetype', undefined, 'string', ['ft'], function(name, cm) {
      // Option is local. Do nothing for global.
      if (cm === undefined) {
        return;
      }
      // The 'filetype' option proxies to the CodeMirror 'mode' option.
      if (name === undefined) {
        var mode = cm.getOption('mode');
        return mode == 'null' ? '' : mode;
      } else {
        var mode = name == '' ? 'null' : name;
        cm.setOption('mode', mode);
      }
    });

    var createCircularJumpList = function() {
      var size = 100;
      var pointer = -1;
      var head = 0;
      var tail = 0;
      var buffer = new Array(size);
      function add(cm, oldCur, newCur) {
        var current = pointer % size;
        var curMark = buffer[current];
        function useNextSlot(cursor) {
          var next = ++pointer % size;
          var trashMark = buffer[next];
          if (trashMark) {
            trashMark.clear();
          }
          buffer[next] = cm.setBookmark(cursor);
        }
        if (curMark) {
          var markPos = curMark.find();
          // avoid recording redundant cursor position
          if (markPos && !cursorEqual(markPos, oldCur)) {
            useNextSlot(oldCur);
          }
        } else {
          useNextSlot(oldCur);
        }
        useNextSlot(newCur);
        head = pointer;
        tail = pointer - size + 1;
        if (tail < 0) {
          tail = 0;
        }
      }
      function move(cm, offset) {
        pointer += offset;
        if (pointer > head) {
          pointer = head;
        } else if (pointer < tail) {
          pointer = tail;
        }
        var mark = buffer[(size + pointer) % size];
        // skip marks that are temporarily removed from text buffer
        if (mark && !mark.find()) {
          var inc = offset > 0 ? 1 : -1;
          var newCur;
          var oldCur = cm.getCursor();
          do {
            pointer += inc;
            mark = buffer[(size + pointer) % size];
            // skip marks that are the same as current position
            if (mark &&
                (newCur = mark.find()) &&
                !cursorEqual(oldCur, newCur)) {
              break;
            }
          } while (pointer < head && pointer > tail);
        }
        return mark;
      }
      return {
        cachedCursor: undefined, //used for # and * jumps
        add: add,
        move: move
      };
    };

    // Returns an object to track the changes associated insert mode.  It
    // clones the object that is passed in, or creates an empty object one if
    // none is provided.
    var createInsertModeChanges = function(c) {
      if (c) {
        // Copy construction
        return {
          changes: c.changes,
          expectCursorActivityForChange: c.expectCursorActivityForChange
        };
      }
      return {
        // Change list
        changes: [],
        // Set to true on change, false on cursorActivity.
        expectCursorActivityForChange: false
      };
    };

    function MacroModeState() {
      this.latestRegister = undefined;
      this.isPlaying = false;
      this.isRecording = false;
      this.replaySearchQueries = [];
      this.onRecordingDone = undefined;
      this.lastInsertModeChanges = createInsertModeChanges();
    }
    MacroModeState.prototype = {
      exitMacroRecordMode: function() {
        var macroModeState = vimGlobalState.macroModeState;
        if (macroModeState.onRecordingDone) {
          macroModeState.onRecordingDone(); // close dialog
        }
        macroModeState.onRecordingDone = undefined;
        macroModeState.isRecording = false;
      },
      enterMacroRecordMode: function(cm, registerName) {
        var register =
            vimGlobalState.registerController.getRegister(registerName);
        if (register) {
          register.clear();
          this.latestRegister = registerName;
          if (cm.openDialog) {
            this.onRecordingDone = cm.openDialog(
                '(recording)['+registerName+']', null, {bottom:true});
          }
          this.isRecording = true;
        }
      }
    };

    function maybeInitVimState(cm) {
      if (!cm.state.vim) {
        // Store instance state in the CodeMirror object.
        cm.state.vim = {
          inputState: new InputState(),
          // Vim's input state that triggered the last edit, used to repeat
          // motions and operators with '.'.
          lastEditInputState: undefined,
          // Vim's action command before the last edit, used to repeat actions
          // with '.' and insert mode repeat.
          lastEditActionCommand: undefined,
          // When using jk for navigation, if you move from a longer line to a
          // shorter line, the cursor may clip to the end of the shorter line.
          // If j is pressed again and cursor goes to the next line, the
          // cursor should go back to its horizontal position on the longer
          // line if it can. This is to keep track of the horizontal position.
          lastHPos: -1,
          // Doing the same with screen-position for gj/gk
          lastHSPos: -1,
          // The last motion command run. Cleared if a non-motion command gets
          // executed in between.
          lastMotion: null,
          marks: {},
          // Mark for rendering fake cursor for visual mode.
          fakeCursor: null,
          insertMode: false,
          // Repeat count for changes made in insert mode, triggered by key
          // sequences like 3,i. Only exists when insertMode is true.
          insertModeRepeat: undefined,
          visualMode: false,
          // If we are in visual line mode. No effect if visualMode is false.
          visualLine: false,
          visualBlock: false,
          lastSelection: null,
          lastPastedText: null,
          sel: {},
          // Buffer-local/window-local values of vim options.
          options: {}
        };
      }
      return cm.state.vim;
    }
    var vimGlobalState;
    function resetVimGlobalState() {
      vimGlobalState = {
        // The current search query.
        searchQuery: null,
        // Whether we are searching backwards.
        searchIsReversed: false,
        // Replace part of the last substituted pattern
        lastSubstituteReplacePart: undefined,
        jumpList: createCircularJumpList(),
        macroModeState: new MacroModeState,
        // Recording latest f, t, F or T motion command.
        lastCharacterSearch: {increment:0, forward:true, selectedCharacter:''},
        registerController: new RegisterController({}),
        // search history buffer
        searchHistoryController: new HistoryController({}),
        // ex Command history buffer
        exCommandHistoryController : new HistoryController({})
      };
      for (var optionName in options) {
        var option = options[optionName];
        option.value = option.defaultValue;
      }
    }

    var lastInsertModeKeyTimer;
    var vimApi= {
      buildKeyMap: function() {
        // TODO: Convert keymap into dictionary format for fast lookup.
      },
      // Testing hook, though it might be useful to expose the register
      // controller anyways.
      getRegisterController: function() {
        return vimGlobalState.registerController;
      },
      // Testing hook.
      resetVimGlobalState_: resetVimGlobalState,

      // Testing hook.
      getVimGlobalState_: function() {
        return vimGlobalState;
      },

      // Testing hook.
      maybeInitVimState_: maybeInitVimState,

      suppressErrorLogging: false,

      InsertModeKey: InsertModeKey,
      map: function(lhs, rhs, ctx) {
        // Add user defined key bindings.
        exCommandDispatcher.map(lhs, rhs, ctx);
      },
      unmap: function(lhs, ctx) {
        exCommandDispatcher.unmap(lhs, ctx);
      },
      // TODO: Expose setOption and getOption as instance methods. Need to decide how to namespace
      // them, or somehow make them work with the existing CodeMirror setOption/getOption API.
      setOption: setOption,
      getOption: getOption,
      defineOption: defineOption,
      defineEx: function(name, prefix, func){
        if (!prefix) {
          prefix = name;
        } else if (name.indexOf(prefix) !== 0) {
          throw new Error('(Vim.defineEx) "'+prefix+'" is not a prefix of "'+name+'", command not registered');
        }
        exCommands[name]=func;
        exCommandDispatcher.commandMap_[prefix]={name:name, shortName:prefix, type:'api'};
      },
      handleKey: function (cm, key, origin) {
        var command = this.findKey(cm, key, origin);
        if (typeof command === 'function') {
          return command();
        }
      },
      /**
       * This is the outermost function called by CodeMirror, after keys have
       * been mapped to their Vim equivalents.
       *
       * Finds a command based on the key (and cached keys if there is a
       * multi-key sequence). Returns `undefined` if no key is matched, a noop
       * function if a partial match is found (multi-key), and a function to
       * execute the bound command if a a key is matched. The function always
       * returns true.
       */
      findKey: function(cm, key, origin) {
        var vim = maybeInitVimState(cm);
        function handleMacroRecording() {
          var macroModeState = vimGlobalState.macroModeState;
          if (macroModeState.isRecording) {
            if (key == 'q') {
              macroModeState.exitMacroRecordMode();
              clearInputState(cm);
              return true;
            }
            if (origin != 'mapping') {
              logKey(macroModeState, key);
            }
          }
        }
        function handleEsc() {
          if (key == '<Esc>') {
            // Clear input state and get back to normal mode.
            clearInputState(cm);
            if (vim.visualMode) {
              exitVisualMode(cm);
            } else if (vim.insertMode) {
              exitInsertMode(cm);
            }
            return true;
          }
        }
        function doKeyToKey(keys) {
          // TODO: prevent infinite recursion.
          var match;
          while (keys) {
            // Pull off one command key, which is either a single character
            // or a special sequence wrapped in '<' and '>', e.g. '<Space>'.
            match = (/<\w+-.+?>|<\w+>|./).exec(keys);
            key = match[0];
            keys = keys.substring(match.index + key.length);
            CodeMirror.Vim.handleKey(cm, key, 'mapping');
          }
        }

        function handleKeyInsertMode() {
          if (handleEsc()) { return true; }
          var keys = vim.inputState.keyBuffer = vim.inputState.keyBuffer + key;
          var keysAreChars = key.length == 1;
          var match = commandDispatcher.matchCommand(keys, defaultKeymap, vim.inputState, 'insert');
          // Need to check all key substrings in insert mode.
          while (keys.length > 1 && match.type != 'full') {
            var keys = vim.inputState.keyBuffer = keys.slice(1);
            var thisMatch = commandDispatcher.matchCommand(keys, defaultKeymap, vim.inputState, 'insert');
            if (thisMatch.type != 'none') { match = thisMatch; }
          }
          if (match.type == 'none') { clearInputState(cm); return false; }
          else if (match.type == 'partial') {
            if (lastInsertModeKeyTimer) { window.clearTimeout(lastInsertModeKeyTimer); }
            lastInsertModeKeyTimer = window.setTimeout(
              function() { if (vim.insertMode && vim.inputState.keyBuffer) { clearInputState(cm); } },
              getOption('insertModeEscKeysTimeout'));
            return !keysAreChars;
          }

          if (lastInsertModeKeyTimer) { window.clearTimeout(lastInsertModeKeyTimer); }
          if (keysAreChars) {
            var selections = cm.listSelections();
            for (var i = 0; i < selections.length; i++) {
              var here = selections[i].head;
              cm.replaceRange('', offsetCursor(here, 0, -(keys.length - 1)), here, '+input');
            }
            vimGlobalState.macroModeState.lastInsertModeChanges.changes.pop();
          }
          clearInputState(cm);
          return match.command;
        }

        function handleKeyNonInsertMode() {
          if (handleMacroRecording() || handleEsc()) { return true; };

          var keys = vim.inputState.keyBuffer = vim.inputState.keyBuffer + key;
          if (/^[1-9]\d*$/.test(keys)) { return true; }

          var keysMatcher = /^(\d*)(.*)$/.exec(keys);
          if (!keysMatcher) { clearInputState(cm); return false; }
          var context = vim.visualMode ? 'visual' :
                                         'normal';
          var match = commandDispatcher.matchCommand(keysMatcher[2] || keysMatcher[1], defaultKeymap, vim.inputState, context);
          if (match.type == 'none') { clearInputState(cm); return false; }
          else if (match.type == 'partial') { return true; }

          vim.inputState.keyBuffer = '';
          var keysMatcher = /^(\d*)(.*)$/.exec(keys);
          if (keysMatcher[1] && keysMatcher[1] != '0') {
            vim.inputState.pushRepeatDigit(keysMatcher[1]);
          }
          return match.command;
        }

        var command;
        if (vim.insertMode) { command = handleKeyInsertMode(); }
        else { command = handleKeyNonInsertMode(); }
        if (command === false) {
          return undefined;
        } else if (command === true) {
          // TODO: Look into using CodeMirror's multi-key handling.
          // Return no-op since we are caching the key. Counts as handled, but
          // don't want act on it just yet.
          return function() { return true; };
        } else {
          return function() {
            return cm.operation(function() {
              cm.curOp.isVimOp = true;
              try {
                if (command.type == 'keyToKey') {
                  doKeyToKey(command.toKeys);
                } else {
                  commandDispatcher.processCommand(cm, vim, command);
                }
              } catch (e) {
                // clear VIM state in case it's in a bad state.
                cm.state.vim = undefined;
                maybeInitVimState(cm);
                if (!CodeMirror.Vim.suppressErrorLogging) {
                  console['log'](e);
                }
                throw e;
              }
              return true;
            });
          };
        }
      },
      handleEx: function(cm, input) {
        exCommandDispatcher.processCommand(cm, input);
      },

      defineMotion: defineMotion,
      defineAction: defineAction,
      defineOperator: defineOperator,
      mapCommand: mapCommand,
      _mapCommand: _mapCommand,

      defineRegister: defineRegister,

      exitVisualMode: exitVisualMode,
      exitInsertMode: exitInsertMode
    };

    // Represents the current input state.
    function InputState() {
      this.prefixRepeat = [];
      this.motionRepeat = [];

      this.operator = null;
      this.operatorArgs = null;
      this.motion = null;
      this.motionArgs = null;
      this.keyBuffer = []; // For matching multi-key commands.
      this.registerName = null; // Defaults to the unnamed register.
    }
    InputState.prototype.pushRepeatDigit = function(n) {
      if (!this.operator) {
        this.prefixRepeat = this.prefixRepeat.concat(n);
      } else {
        this.motionRepeat = this.motionRepeat.concat(n);
      }
    };
    InputState.prototype.getRepeat = function() {
      var repeat = 0;
      if (this.prefixRepeat.length > 0 || this.motionRepeat.length > 0) {
        repeat = 1;
        if (this.prefixRepeat.length > 0) {
          repeat *= parseInt(this.prefixRepeat.join(''), 10);
        }
        if (this.motionRepeat.length > 0) {
          repeat *= parseInt(this.motionRepeat.join(''), 10);
        }
      }
      return repeat;
    };

    function clearInputState(cm, reason) {
      cm.state.vim.inputState = new InputState();
      CodeMirror.signal(cm, 'vim-command-done', reason);
    }

    /*
     * Register stores information about copy and paste registers.  Besides
     * text, a register must store whether it is linewise (i.e., when it is
     * pasted, should it insert itself into a new line, or should the text be
     * inserted at the cursor position.)
     */
    function Register(text, linewise, blockwise) {
      this.clear();
      this.keyBuffer = [text || ''];
      this.insertModeChanges = [];
      this.searchQueries = [];
      this.linewise = !!linewise;
      this.blockwise = !!blockwise;
    }
    Register.prototype = {
      setText: function(text, linewise, blockwise) {
        this.keyBuffer = [text || ''];
        this.linewise = !!linewise;
        this.blockwise = !!blockwise;
      },
      pushText: function(text, linewise) {
        // if this register has ever been set to linewise, use linewise.
        if (linewise) {
          if (!this.linewise) {
            this.keyBuffer.push('\n');
          }
          this.linewise = true;
        }
        this.keyBuffer.push(text);
      },
      pushInsertModeChanges: function(changes) {
        this.insertModeChanges.push(createInsertModeChanges(changes));
      },
      pushSearchQuery: function(query) {
        this.searchQueries.push(query);
      },
      clear: function() {
        this.keyBuffer = [];
        this.insertModeChanges = [];
        this.searchQueries = [];
        this.linewise = false;
      },
      toString: function() {
        return this.keyBuffer.join('');
      }
    };

    /**
     * Defines an external register.
     *
     * The name should be a single character that will be used to reference the register.
     * The register should support setText, pushText, clear, and toString(). See Register
     * for a reference implementation.
     */
    function defineRegister(name, register) {
      var registers = vimGlobalState.registerController.registers[name];
      if (!name || name.length != 1) {
        throw Error('Register name must be 1 character');
      }
      if (registers[name]) {
        throw Error('Register already defined ' + name);
      }
      registers[name] = register;
      validRegisters.push(name);
    }

    /*
     * vim registers allow you to keep many independent copy and paste buffers.
     * See http://usevim.com/2012/04/13/registers/ for an introduction.
     *
     * RegisterController keeps the state of all the registers.  An initial
     * state may be passed in.  The unnamed register '"' will always be
     * overridden.
     */
    function RegisterController(registers) {
      this.registers = registers;
      this.unnamedRegister = registers['"'] = new Register();
      registers['.'] = new Register();
      registers[':'] = new Register();
      registers['/'] = new Register();
    }
    RegisterController.prototype = {
      pushText: function(registerName, operator, text, linewise, blockwise) {
        if (linewise && text.charAt(0) == '\n') {
          text = text.slice(1) + '\n';
        }
        if (linewise && text.charAt(text.length - 1) !== '\n'){
          text += '\n';
        }
        // Lowercase and uppercase registers refer to the same register.
        // Uppercase just means append.
        var register = this.isValidRegister(registerName) ?
            this.getRegister(registerName) : null;
        // if no register/an invalid register was specified, things go to the
        // default registers
        if (!register) {
          switch (operator) {
            case 'yank':
              // The 0 register contains the text from the most recent yank.
              this.registers['0'] = new Register(text, linewise, blockwise);
              break;
            case 'delete':
            case 'change':
              if (text.indexOf('\n') == -1) {
                // Delete less than 1 line. Update the small delete register.
                this.registers['-'] = new Register(text, linewise);
              } else {
                // Shift down the contents of the numbered registers and put the
                // deleted text into register 1.
                this.shiftNumericRegisters_();
                this.registers['1'] = new Register(text, linewise);
              }
              break;
          }
          // Make sure the unnamed register is set to what just happened
          this.unnamedRegister.setText(text, linewise, blockwise);
          return;
        }

        // If we've gotten to this point, we've actually specified a register
        var append = isUpperCase(registerName);
        if (append) {
          register.pushText(text, linewise);
        } else {
          register.setText(text, linewise, blockwise);
        }
        // The unnamed register always has the same value as the last used
        // register.
        this.unnamedRegister.setText(register.toString(), linewise);
      },
      // Gets the register named @name.  If one of @name doesn't already exist,
      // create it.  If @name is invalid, return the unnamedRegister.
      getRegister: function(name) {
        if (!this.isValidRegister(name)) {
          return this.unnamedRegister;
        }
        name = name.toLowerCase();
        if (!this.registers[name]) {
          this.registers[name] = new Register();
        }
        return this.registers[name];
      },
      isValidRegister: function(name) {
        return name && inArray(name, validRegisters);
      },
      shiftNumericRegisters_: function() {
        for (var i = 9; i >= 2; i--) {
          this.registers[i] = this.getRegister('' + (i - 1));
        }
      }
    };
    function HistoryController() {
        this.historyBuffer = [];
        this.iterator = 0;
        this.initialPrefix = null;
    }
    HistoryController.prototype = {
      // the input argument here acts a user entered prefix for a small time
      // until we start autocompletion in which case it is the autocompleted.
      nextMatch: function (input, up) {
        var historyBuffer = this.historyBuffer;
        var dir = up ? -1 : 1;
        if (this.initialPrefix === null) this.initialPrefix = input;
        for (var i = this.iterator + dir; up ? i >= 0 : i < historyBuffer.length; i+= dir) {
          var element = historyBuffer[i];
          for (var j = 0; j <= element.length; j++) {
            if (this.initialPrefix == element.substring(0, j)) {
              this.iterator = i;
              return element;
            }
          }
        }
        // should return the user input in case we reach the end of buffer.
        if (i >= historyBuffer.length) {
          this.iterator = historyBuffer.length;
          return this.initialPrefix;
        }
        // return the last autocompleted query or exCommand as it is.
        if (i < 0 ) return input;
      },
      pushInput: function(input) {
        var index = this.historyBuffer.indexOf(input);
        if (index > -1) this.historyBuffer.splice(index, 1);
        if (input.length) this.historyBuffer.push(input);
      },
      reset: function() {
        this.initialPrefix = null;
        this.iterator = this.historyBuffer.length;
      }
    };
    var commandDispatcher = {
      matchCommand: function(keys, keyMap, inputState, context) {
        var matches = commandMatches(keys, keyMap, context, inputState);
        if (!matches.full && !matches.partial) {
          return {type: 'none'};
        } else if (!matches.full && matches.partial) {
          return {type: 'partial'};
        }

        var bestMatch;
        for (var i = 0; i < matches.full.length; i++) {
          var match = matches.full[i];
          if (!bestMatch) {
            bestMatch = match;
          }
        }
        if (bestMatch.keys.slice(-11) == '<character>') {
          inputState.selectedCharacter = lastChar(keys);
        }
        return {type: 'full', command: bestMatch};
      },
      processCommand: function(cm, vim, command) {
        vim.inputState.repeatOverride = command.repeatOverride;
        switch (command.type) {
          case 'motion':
            this.processMotion(cm, vim, command);
            break;
          case 'operator':
            this.processOperator(cm, vim, command);
            break;
          case 'operatorMotion':
            this.processOperatorMotion(cm, vim, command);
            break;
          case 'action':
            this.processAction(cm, vim, command);
            break;
          case 'search':
            this.processSearch(cm, vim, command);
            break;
          case 'ex':
          case 'keyToEx':
            this.processEx(cm, vim, command);
            break;
          default:
            break;
        }
      },
      processMotion: function(cm, vim, command) {
        vim.inputState.motion = command.motion;
        vim.inputState.motionArgs = copyArgs(command.motionArgs);
        this.evalInput(cm, vim);
      },
      processOperator: function(cm, vim, command) {
        var inputState = vim.inputState;
        if (inputState.operator) {
          if (inputState.operator == command.operator) {
            // Typing an operator twice like 'dd' makes the operator operate
            // linewise
            inputState.motion = 'expandToLine';
            inputState.motionArgs = { linewise: true };
            this.evalInput(cm, vim);
            return;
          } else {
            // 2 different operators in a row doesn't make sense.
            clearInputState(cm);
          }
        }
        inputState.operator = command.operator;
        inputState.operatorArgs = copyArgs(command.operatorArgs);
        if (vim.visualMode) {
          // Operating on a selection in visual mode. We don't need a motion.
          this.evalInput(cm, vim);
        }
      },
      processOperatorMotion: function(cm, vim, command) {
        var visualMode = vim.visualMode;
        var operatorMotionArgs = copyArgs(command.operatorMotionArgs);
        if (operatorMotionArgs) {
          // Operator motions may have special behavior in visual mode.
          if (visualMode && operatorMotionArgs.visualLine) {
            vim.visualLine = true;
          }
        }
        this.processOperator(cm, vim, command);
        if (!visualMode) {
          this.processMotion(cm, vim, command);
        }
      },
      processAction: function(cm, vim, command) {
        var inputState = vim.inputState;
        var repeat = inputState.getRepeat();
        var repeatIsExplicit = !!repeat;
        var actionArgs = copyArgs(command.actionArgs) || {};
        if (inputState.selectedCharacter) {
          actionArgs.selectedCharacter = inputState.selectedCharacter;
        }
        // Actions may or may not have motions and operators. Do these first.
        if (command.operator) {
          this.processOperator(cm, vim, command);
        }
        if (command.motion) {
          this.processMotion(cm, vim, command);
        }
        if (command.motion || command.operator) {
          this.evalInput(cm, vim);
        }
        actionArgs.repeat = repeat || 1;
        actionArgs.repeatIsExplicit = repeatIsExplicit;
        actionArgs.registerName = inputState.registerName;
        clearInputState(cm);
        vim.lastMotion = null;
        if (command.isEdit) {
          this.recordLastEdit(vim, inputState, command);
        }
        actions[command.action](cm, actionArgs, vim);
      },
      processSearch: function(cm, vim, command) {
        if (!cm.getSearchCursor) {
          // Search depends on SearchCursor.
          return;
        }
        var forward = command.searchArgs.forward;
        var wholeWordOnly = command.searchArgs.wholeWordOnly;
        getSearchState(cm).setReversed(!forward);
        var promptPrefix = (forward) ? '/' : '?';
        var originalQuery = getSearchState(cm).getQuery();
        var originalScrollPos = cm.getScrollInfo();
        function handleQuery(query, ignoreCase, smartCase) {
          vimGlobalState.searchHistoryController.pushInput(query);
          vimGlobalState.searchHistoryController.reset();
          try {
            updateSearchQuery(cm, query, ignoreCase, smartCase);
          } catch (e) {
            showConfirm(cm, 'Invalid regex: ' + query);
            clearInputState(cm);
            return;
          }
          commandDispatcher.processMotion(cm, vim, {
            type: 'motion',
            motion: 'findNext',
            motionArgs: { forward: true, toJumplist: command.searchArgs.toJumplist }
          });
        }
        function onPromptClose(query) {
          cm.scrollTo(originalScrollPos.left, originalScrollPos.top);
          handleQuery(query, true /** ignoreCase */, true /** smartCase */);
          var macroModeState = vimGlobalState.macroModeState;
          if (macroModeState.isRecording) {
            logSearchQuery(macroModeState, query);
          }
        }
        function onPromptKeyUp(e, query, close) {
          var keyName = CodeMirror.keyName(e), up, offset;
          if (keyName == 'Up' || keyName == 'Down') {
            up = keyName == 'Up' ? true : false;
            offset = e.target ? e.target.selectionEnd : 0;
            query = vimGlobalState.searchHistoryController.nextMatch(query, up) || '';
            close(query);
            if (offset && e.target) e.target.selectionEnd = e.target.selectionStart = Math.min(offset, e.target.value.length);
          } else {
            if ( keyName != 'Left' && keyName != 'Right' && keyName != 'Ctrl' && keyName != 'Alt' && keyName != 'Shift')
              vimGlobalState.searchHistoryController.reset();
          }
          var parsedQuery;
          try {
            parsedQuery = updateSearchQuery(cm, query,
                true /** ignoreCase */, true /** smartCase */);
          } catch (e) {
            // Swallow bad regexes for incremental search.
          }
          if (parsedQuery) {
            cm.scrollIntoView(findNext(cm, !forward, parsedQuery), 30);
          } else {
            clearSearchHighlight(cm);
            cm.scrollTo(originalScrollPos.left, originalScrollPos.top);
          }
        }
        function onPromptKeyDown(e, query, close) {
          var keyName = CodeMirror.keyName(e);
          if (keyName == 'Esc' || keyName == 'Ctrl-C' || keyName == 'Ctrl-[' ||
              (keyName == 'Backspace' && query == '')) {
            vimGlobalState.searchHistoryController.pushInput(query);
            vimGlobalState.searchHistoryController.reset();
            updateSearchQuery(cm, originalQuery);
            clearSearchHighlight(cm);
            cm.scrollTo(originalScrollPos.left, originalScrollPos.top);
            CodeMirror.e_stop(e);
            clearInputState(cm);
            close();
            cm.focus();
          } else if (keyName == 'Up' || keyName == 'Down') {
            CodeMirror.e_stop(e);
          } else if (keyName == 'Ctrl-U') {
            // Ctrl-U clears input.
            CodeMirror.e_stop(e);
            close('');
          }
        }
        switch (command.searchArgs.querySrc) {
          case 'prompt':
            var macroModeState = vimGlobalState.macroModeState;
            if (macroModeState.isPlaying) {
              var query = macroModeState.replaySearchQueries.shift();
              handleQuery(query, true /** ignoreCase */, false /** smartCase */);
            } else {
              showPrompt(cm, {
                  onClose: onPromptClose,
                  prefix: promptPrefix,
                  desc: searchPromptDesc,
                  onKeyUp: onPromptKeyUp,
                  onKeyDown: onPromptKeyDown
              });
            }
            break;
          case 'wordUnderCursor':
            var word = expandWordUnderCursor(cm, false /** inclusive */,
                true /** forward */, false /** bigWord */,
                true /** noSymbol */);
            var isKeyword = true;
            if (!word) {
              word = expandWordUnderCursor(cm, false /** inclusive */,
                  true /** forward */, false /** bigWord */,
                  false /** noSymbol */);
              isKeyword = false;
            }
            if (!word) {
              return;
            }
            var query = cm.getLine(word.start.line).substring(word.start.ch,
                word.end.ch);
            if (isKeyword && wholeWordOnly) {
                query = '\\b' + query + '\\b';
            } else {
              query = escapeRegex(query);
            }

            // cachedCursor is used to save the old position of the cursor
            // when * or # causes vim to seek for the nearest word and shift
            // the cursor before entering the motion.
            vimGlobalState.jumpList.cachedCursor = cm.getCursor();
            cm.setCursor(word.start);

            handleQuery(query, true /** ignoreCase */, false /** smartCase */);
            break;
        }
      },
      processEx: function(cm, vim, command) {
        function onPromptClose(input) {
          // Give the prompt some time to close so that if processCommand shows
          // an error, the elements don't overlap.
          vimGlobalState.exCommandHistoryController.pushInput(input);
          vimGlobalState.exCommandHistoryController.reset();
          exCommandDispatcher.processCommand(cm, input);
        }
        function onPromptKeyDown(e, input, close) {
          var keyName = CodeMirror.keyName(e), up, offset;
          if (keyName == 'Esc' || keyName == 'Ctrl-C' || keyName == 'Ctrl-[' ||
              (keyName == 'Backspace' && input == '')) {
            vimGlobalState.exCommandHistoryController.pushInput(input);
            vimGlobalState.exCommandHistoryController.reset();
            CodeMirror.e_stop(e);
            clearInputState(cm);
            close();
            cm.focus();
          }
          if (keyName == 'Up' || keyName == 'Down') {
            CodeMirror.e_stop(e);
            up = keyName == 'Up' ? true : false;
            offset = e.target ? e.target.selectionEnd : 0;
            input = vimGlobalState.exCommandHistoryController.nextMatch(input, up) || '';
            close(input);
            if (offset && e.target) e.target.selectionEnd = e.target.selectionStart = Math.min(offset, e.target.value.length);
          } else if (keyName == 'Ctrl-U') {
            // Ctrl-U clears input.
            CodeMirror.e_stop(e);
            close('');
          } else {
            if ( keyName != 'Left' && keyName != 'Right' && keyName != 'Ctrl' && keyName != 'Alt' && keyName != 'Shift')
              vimGlobalState.exCommandHistoryController.reset();
          }
        }
        if (command.type == 'keyToEx') {
          // Handle user defined Ex to Ex mappings
          exCommandDispatcher.processCommand(cm, command.exArgs.input);
        } else {
          if (vim.visualMode) {
            showPrompt(cm, { onClose: onPromptClose, prefix: ':', value: '\'<,\'>',
                onKeyDown: onPromptKeyDown});
          } else {
            showPrompt(cm, { onClose: onPromptClose, prefix: ':',
                onKeyDown: onPromptKeyDown});
          }
        }
      },
      evalInput: function(cm, vim) {
        // If the motion command is set, execute both the operator and motion.
        // Otherwise return.
        var inputState = vim.inputState;
        var motion = inputState.motion;
        var motionArgs = inputState.motionArgs || {};
        var operator = inputState.operator;
        var operatorArgs = inputState.operatorArgs || {};
        var registerName = inputState.registerName;
        var sel = vim.sel;
        // TODO: Make sure cm and vim selections are identical outside visual mode.
        var origHead = copyCursor(vim.visualMode ? clipCursorToContent(cm, sel.head): cm.getCursor('head'));
        var origAnchor = copyCursor(vim.visualMode ? clipCursorToContent(cm, sel.anchor) : cm.getCursor('anchor'));
        var oldHead = copyCursor(origHead);
        var oldAnchor = copyCursor(origAnchor);
        var newHead, newAnchor;
        var repeat;
        if (operator) {
          this.recordLastEdit(vim, inputState);
        }
        if (inputState.repeatOverride !== undefined) {
          // If repeatOverride is specified, that takes precedence over the
          // input state's repeat. Used by Ex mode and can be user defined.
          repeat = inputState.repeatOverride;
        } else {
          repeat = inputState.getRepeat();
        }
        if (repeat > 0 && motionArgs.explicitRepeat) {
          motionArgs.repeatIsExplicit = true;
        } else if (motionArgs.noRepeat ||
            (!motionArgs.explicitRepeat && repeat === 0)) {
          repeat = 1;
          motionArgs.repeatIsExplicit = false;
        }
        if (inputState.selectedCharacter) {
          // If there is a character input, stick it in all of the arg arrays.
          motionArgs.selectedCharacter = operatorArgs.selectedCharacter =
              inputState.selectedCharacter;
        }
        motionArgs.repeat = repeat;
        clearInputState(cm);
        if (motion) {
          var motionResult = motions[motion](cm, origHead, motionArgs, vim);
          vim.lastMotion = motions[motion];
          if (!motionResult) {
            return;
          }
          if (motionArgs.toJumplist) {
            var jumpList = vimGlobalState.jumpList;
            // if the current motion is # or *, use cachedCursor
            var cachedCursor = jumpList.cachedCursor;
            if (cachedCursor) {
              recordJumpPosition(cm, cachedCursor, motionResult);
              delete jumpList.cachedCursor;
            } else {
              recordJumpPosition(cm, origHead, motionResult);
            }
          }
          if (motionResult instanceof Array) {
            newAnchor = motionResult[0];
            newHead = motionResult[1];
          } else {
            newHead = motionResult;
          }
          // TODO: Handle null returns from motion commands better.
          if (!newHead) {
            newHead = copyCursor(origHead);
          }
          if (vim.visualMode) {
            if (!(vim.visualBlock && newHead.ch === Infinity)) {
              newHead = clipCursorToContent(cm, newHead, vim.visualBlock);
            }
            if (newAnchor) {
              newAnchor = clipCursorToContent(cm, newAnchor, true);
            }
            newAnchor = newAnchor || oldAnchor;
            sel.anchor = newAnchor;
            sel.head = newHead;
            updateCmSelection(cm);
            updateMark(cm, vim, '<',
                cursorIsBefore(newAnchor, newHead) ? newAnchor
                    : newHead);
            updateMark(cm, vim, '>',
                cursorIsBefore(newAnchor, newHead) ? newHead
                    : newAnchor);
          } else if (!operator) {
            newHead = clipCursorToContent(cm, newHead);
            cm.setCursor(newHead.line, newHead.ch);
          }
        }
        if (operator) {
          if (operatorArgs.lastSel) {
            // Replaying a visual mode operation
            newAnchor = oldAnchor;
            var lastSel = operatorArgs.lastSel;
            var lineOffset = Math.abs(lastSel.head.line - lastSel.anchor.line);
            var chOffset = Math.abs(lastSel.head.ch - lastSel.anchor.ch);
            if (lastSel.visualLine) {
              // Linewise Visual mode: The same number of lines.
              newHead = Pos(oldAnchor.line + lineOffset, oldAnchor.ch);
            } else if (lastSel.visualBlock) {
              // Blockwise Visual mode: The same number of lines and columns.
              newHead = Pos(oldAnchor.line + lineOffset, oldAnchor.ch + chOffset);
            } else if (lastSel.head.line == lastSel.anchor.line) {
              // Normal Visual mode within one line: The same number of characters.
              newHead = Pos(oldAnchor.line, oldAnchor.ch + chOffset);
            } else {
              // Normal Visual mode with several lines: The same number of lines, in the
              // last line the same number of characters as in the last line the last time.
              newHead = Pos(oldAnchor.line + lineOffset, oldAnchor.ch);
            }
            vim.visualMode = true;
            vim.visualLine = lastSel.visualLine;
            vim.visualBlock = lastSel.visualBlock;
            sel = vim.sel = {
              anchor: newAnchor,
              head: newHead
            };
            updateCmSelection(cm);
          } else if (vim.visualMode) {
            operatorArgs.lastSel = {
              anchor: copyCursor(sel.anchor),
              head: copyCursor(sel.head),
              visualBlock: vim.visualBlock,
              visualLine: vim.visualLine
            };
          }
          var curStart, curEnd, linewise, mode;
          var cmSel;
          if (vim.visualMode) {
            // Init visual op
            curStart = cursorMin(sel.head, sel.anchor);
            curEnd = cursorMax(sel.head, sel.anchor);
            linewise = vim.visualLine || operatorArgs.linewise;
            mode = vim.visualBlock ? 'block' :
                   linewise ? 'line' :
                   'char';
            cmSel = makeCmSelection(cm, {
              anchor: curStart,
              head: curEnd
            }, mode);
            if (linewise) {
              var ranges = cmSel.ranges;
              if (mode == 'block') {
                // Linewise operators in visual block mode extend to end of line
                for (var i = 0; i < ranges.length; i++) {
                  ranges[i].head.ch = lineLength(cm, ranges[i].head.line);
                }
              } else if (mode == 'line') {
                ranges[0].head = Pos(ranges[0].head.line + 1, 0);
              }
            }
          } else {
            // Init motion op
            curStart = copyCursor(newAnchor || oldAnchor);
            curEnd = copyCursor(newHead || oldHead);
            if (cursorIsBefore(curEnd, curStart)) {
              var tmp = curStart;
              curStart = curEnd;
              curEnd = tmp;
            }
            linewise = motionArgs.linewise || operatorArgs.linewise;
            if (linewise) {
              // Expand selection to entire line.
              expandSelectionToLine(cm, curStart, curEnd);
            } else if (motionArgs.forward) {
              // Clip to trailing newlines only if the motion goes forward.
              clipToLine(cm, curStart, curEnd);
            }
            mode = 'char';
            var exclusive = !motionArgs.inclusive || linewise;
            cmSel = makeCmSelection(cm, {
              anchor: curStart,
              head: curEnd
            }, mode, exclusive);
          }
          cm.setSelections(cmSel.ranges, cmSel.primary);
          vim.lastMotion = null;
          operatorArgs.repeat = repeat; // For indent in visual mode.
          operatorArgs.registerName = registerName;
          // Keep track of linewise as it affects how paste and change behave.
          operatorArgs.linewise = linewise;
          var operatorMoveTo = operators[operator](
            cm, operatorArgs, cmSel.ranges, oldAnchor, newHead);
          if (vim.visualMode) {
            exitVisualMode(cm, operatorMoveTo != null);
          }
          if (operatorMoveTo) {
            cm.setCursor(operatorMoveTo);
          }
        }
      },
      recordLastEdit: function(vim, inputState, actionCommand) {
        var macroModeState = vimGlobalState.macroModeState;
        if (macroModeState.isPlaying) { return; }
        vim.lastEditInputState = inputState;
        vim.lastEditActionCommand = actionCommand;
        macroModeState.lastInsertModeChanges.changes = [];
        macroModeState.lastInsertModeChanges.expectCursorActivityForChange = false;
      }
    };

    /**
     * typedef {Object{line:number,ch:number}} Cursor An object containing the
     *     position of the cursor.
     */
    // All of the functions below return Cursor objects.
    var motions = {
      moveToTopLine: function(cm, _head, motionArgs) {
        var line = getUserVisibleLines(cm).top + motionArgs.repeat -1;
        return Pos(line, findFirstNonWhiteSpaceCharacter(cm.getLine(line)));
      },
      moveToMiddleLine: function(cm) {
        var range = getUserVisibleLines(cm);
        var line = Math.floor((range.top + range.bottom) * 0.5);
        return Pos(line, findFirstNonWhiteSpaceCharacter(cm.getLine(line)));
      },
      moveToBottomLine: function(cm, _head, motionArgs) {
        var line = getUserVisibleLines(cm).bottom - motionArgs.repeat +1;
        return Pos(line, findFirstNonWhiteSpaceCharacter(cm.getLine(line)));
      },
      expandToLine: function(_cm, head, motionArgs) {
        // Expands forward to end of line, and then to next line if repeat is
        // >1. Does not handle backward motion!
        var cur = head;
        return Pos(cur.line + motionArgs.repeat - 1, Infinity);
      },
      findNext: function(cm, _head, motionArgs) {
        var state = getSearchState(cm);
        var query = state.getQuery();
        if (!query) {
          return;
        }
        var prev = !motionArgs.forward;
        // If search is initiated with ? instead of /, negate direction.
        prev = (state.isReversed()) ? !prev : prev;
        highlightSearchMatches(cm, query);
        return findNext(cm, prev/** prev */, query, motionArgs.repeat);
      },
      goToMark: function(cm, _head, motionArgs, vim) {
        var pos = getMarkPos(cm, vim, motionArgs.selectedCharacter);
        if (pos) {
          return motionArgs.linewise ? { line: pos.line, ch: findFirstNonWhiteSpaceCharacter(cm.getLine(pos.line)) } : pos;
        }
        return null;
      },
      moveToOtherHighlightedEnd: function(cm, _head, motionArgs, vim) {
        if (vim.visualBlock && motionArgs.sameLine) {
          var sel = vim.sel;
          return [
            clipCursorToContent(cm, Pos(sel.anchor.line, sel.head.ch)),
            clipCursorToContent(cm, Pos(sel.head.line, sel.anchor.ch))
          ];
        } else {
          return ([vim.sel.head, vim.sel.anchor]);
        }
      },
      jumpToMark: function(cm, head, motionArgs, vim) {
        var best = head;
        for (var i = 0; i < motionArgs.repeat; i++) {
          var cursor = best;
          for (var key in vim.marks) {
            if (!isLowerCase(key)) {
              continue;
            }
            var mark = vim.marks[key].find();
            var isWrongDirection = (motionArgs.forward) ?
              cursorIsBefore(mark, cursor) : cursorIsBefore(cursor, mark);

            if (isWrongDirection) {
              continue;
            }
            if (motionArgs.linewise && (mark.line == cursor.line)) {
              continue;
            }

            var equal = cursorEqual(cursor, best);
            var between = (motionArgs.forward) ?
              cursorIsBetween(cursor, mark, best) :
              cursorIsBetween(best, mark, cursor);

            if (equal || between) {
              best = mark;
            }
          }
        }

        if (motionArgs.linewise) {
          // Vim places the cursor on the first non-whitespace character of
          // the line if there is one, else it places the cursor at the end
          // of the line, regardless of whether a mark was found.
          best = Pos(best.line, findFirstNonWhiteSpaceCharacter(cm.getLine(best.line)));
        }
        return best;
      },
      moveByCharacters: function(_cm, head, motionArgs) {
        var cur = head;
        var repeat = motionArgs.repeat;
        var ch = motionArgs.forward ? cur.ch + repeat : cur.ch - repeat;
        return Pos(cur.line, ch);
      },
      moveByLines: function(cm, head, motionArgs, vim) {
        var cur = head;
        var endCh = cur.ch;
        // Depending what our last motion was, we may want to do different
        // things. If our last motion was moving vertically, we want to
        // preserve the HPos from our last horizontal move.  If our last motion
        // was going to the end of a line, moving vertically we should go to
        // the end of the line, etc.
        switch (vim.lastMotion) {
          case this.moveByLines:
          case this.moveByDisplayLines:
          case this.moveByScroll:
          case this.moveToColumn:
          case this.moveToEol:
            endCh = vim.lastHPos;
            break;
          default:
            vim.lastHPos = endCh;
        }
        var repeat = motionArgs.repeat+(motionArgs.repeatOffset||0);
        var line = motionArgs.forward ? cur.line + repeat : cur.line - repeat;
        var first = cm.firstLine();
        var last = cm.lastLine();
        // Vim go to line begin or line end when cursor at first/last line and
        // move to previous/next line is triggered.
        if (line < first && cur.line == first){
          return this.moveToStartOfLine(cm, head, motionArgs, vim);
        }else if (line > last && cur.line == last){
            return this.moveToEol(cm, head, motionArgs, vim);
        }
        if (motionArgs.toFirstChar){
          endCh=findFirstNonWhiteSpaceCharacter(cm.getLine(line));
          vim.lastHPos = endCh;
        }
        vim.lastHSPos = cm.charCoords(Pos(line, endCh),'div').left;
        return Pos(line, endCh);
      },
      moveByDisplayLines: function(cm, head, motionArgs, vim) {
        var cur = head;
        switch (vim.lastMotion) {
          case this.moveByDisplayLines:
          case this.moveByScroll:
          case this.moveByLines:
          case this.moveToColumn:
          case this.moveToEol:
            break;
          default:
            vim.lastHSPos = cm.charCoords(cur,'div').left;
        }
        var repeat = motionArgs.repeat;
        var res=cm.findPosV(cur,(motionArgs.forward ? repeat : -repeat),'line',vim.lastHSPos);
        if (res.hitSide) {
          if (motionArgs.forward) {
            var lastCharCoords = cm.charCoords(res, 'div');
            var goalCoords = { top: lastCharCoords.top + 8, left: vim.lastHSPos };
            var res = cm.coordsChar(goalCoords, 'div');
          } else {
            var resCoords = cm.charCoords(Pos(cm.firstLine(), 0), 'div');
            resCoords.left = vim.lastHSPos;
            res = cm.coordsChar(resCoords, 'div');
          }
        }
        vim.lastHPos = res.ch;
        return res;
      },
      moveByPage: function(cm, head, motionArgs) {
        // CodeMirror only exposes functions that move the cursor page down, so
        // doing this bad hack to move the cursor and move it back. evalInput
        // will move the cursor to where it should be in the end.
        var curStart = head;
        var repeat = motionArgs.repeat;
        return cm.findPosV(curStart, (motionArgs.forward ? repeat : -repeat), 'page');
      },
      moveByParagraph: function(cm, head, motionArgs) {
        var dir = motionArgs.forward ? 1 : -1;
        return findParagraph(cm, head, motionArgs.repeat, dir);
      },
      moveByScroll: function(cm, head, motionArgs, vim) {
        var scrollbox = cm.getScrollInfo();
        var curEnd = null;
        var repeat = motionArgs.repeat;
        if (!repeat) {
          repeat = scrollbox.clientHeight / (2 * cm.defaultTextHeight());
        }
        var orig = cm.charCoords(head, 'local');
        motionArgs.repeat = repeat;
        var curEnd = motions.moveByDisplayLines(cm, head, motionArgs, vim);
        if (!curEnd) {
          return null;
        }
        var dest = cm.charCoords(curEnd, 'local');
        cm.scrollTo(null, scrollbox.top + dest.top - orig.top);
        return curEnd;
      },
      moveByWords: function(cm, head, motionArgs) {
        return moveToWord(cm, head, motionArgs.repeat, !!motionArgs.forward,
            !!motionArgs.wordEnd, !!motionArgs.bigWord);
      },
      moveTillCharacter: function(cm, _head, motionArgs) {
        var repeat = motionArgs.repeat;
        var curEnd = moveToCharacter(cm, repeat, motionArgs.forward,
            motionArgs.selectedCharacter);
        var increment = motionArgs.forward ? -1 : 1;
        recordLastCharacterSearch(increment, motionArgs);
        if (!curEnd) return null;
        curEnd.ch += increment;
        return curEnd;
      },
      moveToCharacter: function(cm, head, motionArgs) {
        var repeat = motionArgs.repeat;
        recordLastCharacterSearch(0, motionArgs);
        return moveToCharacter(cm, repeat, motionArgs.forward,
            motionArgs.selectedCharacter) || head;
      },
      moveToSymbol: function(cm, head, motionArgs) {
        var repeat = motionArgs.repeat;
        return findSymbol(cm, repeat, motionArgs.forward,
            motionArgs.selectedCharacter) || head;
      },
      moveToColumn: function(cm, head, motionArgs, vim) {
        var repeat = motionArgs.repeat;
        // repeat is equivalent to which column we want to move to!
        vim.lastHPos = repeat - 1;
        vim.lastHSPos = cm.charCoords(head,'div').left;
        return moveToColumn(cm, repeat);
      },
      moveToEol: function(cm, head, motionArgs, vim) {
        var cur = head;
        vim.lastHPos = Infinity;
        var retval= Pos(cur.line + motionArgs.repeat - 1, Infinity);
        var end=cm.clipPos(retval);
        end.ch--;
        vim.lastHSPos = cm.charCoords(end,'div').left;
        return retval;
      },
      moveToFirstNonWhiteSpaceCharacter: function(cm, head) {
        // Go to the start of the line where the text begins, or the end for
        // whitespace-only lines
        var cursor = head;
        return Pos(cursor.line,
                   findFirstNonWhiteSpaceCharacter(cm.getLine(cursor.line)));
      },
      moveToMatchedSymbol: function(cm, head) {
        var cursor = head;
        var line = cursor.line;
        var ch = cursor.ch;
        var lineText = cm.getLine(line);
        var symbol;
        do {
          symbol = lineText.charAt(ch++);
          if (symbol && isMatchableSymbol(symbol)) {
            var style = cm.getTokenTypeAt(Pos(line, ch));
            if (style !== "string" && style !== "comment") {
              break;
            }
          }
        } while (symbol);
        if (symbol) {
          var matched = cm.findMatchingBracket(Pos(line, ch));
          return matched.to;
        } else {
          return cursor;
        }
      },
      moveToStartOfLine: function(_cm, head) {
        return Pos(head.line, 0);
      },
      moveToLineOrEdgeOfDocument: function(cm, _head, motionArgs) {
        var lineNum = motionArgs.forward ? cm.lastLine() : cm.firstLine();
        if (motionArgs.repeatIsExplicit) {
          lineNum = motionArgs.repeat - cm.getOption('firstLineNumber');
        }
        return Pos(lineNum,
                   findFirstNonWhiteSpaceCharacter(cm.getLine(lineNum)));
      },
      textObjectManipulation: function(cm, head, motionArgs, vim) {
        // TODO: lots of possible exceptions that can be thrown here. Try da(
        //     outside of a () block.

        // TODO: adding <> >< to this map doesn't work, presumably because
        // they're operators
        var mirroredPairs = {'(': ')', ')': '(',
                             '{': '}', '}': '{',
                             '[': ']', ']': '['};
        var selfPaired = {'\'': true, '"': true};

        var character = motionArgs.selectedCharacter;
        // 'b' refers to  '()' block.
        // 'B' refers to  '{}' block.
        if (character == 'b') {
          character = '(';
        } else if (character == 'B') {
          character = '{';
        }

        // Inclusive is the difference between a and i
        // TODO: Instead of using the additional text object map to perform text
        //     object operations, merge the map into the defaultKeyMap and use
        //     motionArgs to define behavior. Define separate entries for 'aw',
        //     'iw', 'a[', 'i[', etc.
        var inclusive = !motionArgs.textObjectInner;

        var tmp;
        if (mirroredPairs[character]) {
          tmp = selectCompanionObject(cm, head, character, inclusive);
        } else if (selfPaired[character]) {
          tmp = findBeginningAndEnd(cm, head, character, inclusive);
        } else if (character === 'W') {
          tmp = expandWordUnderCursor(cm, inclusive, true /** forward */,
                                                     true /** bigWord */);
        } else if (character === 'w') {
          tmp = expandWordUnderCursor(cm, inclusive, true /** forward */,
                                                     false /** bigWord */);
        } else if (character === 'p') {
          tmp = findParagraph(cm, head, motionArgs.repeat, 0, inclusive);
          motionArgs.linewise = true;
          if (vim.visualMode) {
            if (!vim.visualLine) { vim.visualLine = true; }
          } else {
            var operatorArgs = vim.inputState.operatorArgs;
            if (operatorArgs) { operatorArgs.linewise = true; }
            tmp.end.line--;
          }
        } else {
          // No text object defined for this, don't move.
          return null;
        }

        if (!cm.state.vim.visualMode) {
          return [tmp.start, tmp.end];
        } else {
          return expandSelection(cm, tmp.start, tmp.end);
        }
      },

      repeatLastCharacterSearch: function(cm, head, motionArgs) {
        var lastSearch = vimGlobalState.lastCharacterSearch;
        var repeat = motionArgs.repeat;
        var forward = motionArgs.forward === lastSearch.forward;
        var increment = (lastSearch.increment ? 1 : 0) * (forward ? -1 : 1);
        cm.moveH(-increment, 'char');
        motionArgs.inclusive = forward ? true : false;
        var curEnd = moveToCharacter(cm, repeat, forward, lastSearch.selectedCharacter);
        if (!curEnd) {
          cm.moveH(increment, 'char');
          return head;
        }
        curEnd.ch += increment;
        return curEnd;
      }
    };

    function defineMotion(name, fn) {
      motions[name] = fn;
    }

    function fillArray(val, times) {
      var arr = [];
      for (var i = 0; i < times; i++) {
        arr.push(val);
      }
      return arr;
    }
    /**
     * An operator acts on a text selection. It receives the list of selections
     * as input. The corresponding CodeMirror selection is guaranteed to
    * match the input selection.
     */
    var operators = {
      change: function(cm, args, ranges) {
        var finalHead, text;
        var vim = cm.state.vim;
        vimGlobalState.macroModeState.lastInsertModeChanges.inVisualBlock = vim.visualBlock;
        if (!vim.visualMode) {
          var anchor = ranges[0].anchor,
              head = ranges[0].head;
          text = cm.getRange(anchor, head);
          var lastState = vim.lastEditInputState || {};
          if (lastState.motion == "moveByWords" && !isWhiteSpaceString(text)) {
            // Exclude trailing whitespace if the range is not all whitespace.
            var match = (/\s+$/).exec(text);
            if (match && lastState.motionArgs && lastState.motionArgs.forward) {
              head = offsetCursor(head, 0, - match[0].length);
              text = text.slice(0, - match[0].length);
            }
          }
          var prevLineEnd = new Pos(anchor.line - 1, Number.MAX_VALUE);
          var wasLastLine = cm.firstLine() == cm.lastLine();
          if (head.line > cm.lastLine() && args.linewise && !wasLastLine) {
            cm.replaceRange('', prevLineEnd, head);
          } else {
            cm.replaceRange('', anchor, head);
          }
          if (args.linewise) {
            // Push the next line back down, if there is a next line.
            if (!wasLastLine) {
              cm.setCursor(prevLineEnd);
              CodeMirror.commands.newlineAndIndent(cm);
            }
            // make sure cursor ends up at the end of the line.
            anchor.ch = Number.MAX_VALUE;
          }
          finalHead = anchor;
        } else {
          text = cm.getSelection();
          var replacement = fillArray('', ranges.length);
          cm.replaceSelections(replacement);
          finalHead = cursorMin(ranges[0].head, ranges[0].anchor);
        }
        vimGlobalState.registerController.pushText(
            args.registerName, 'change', text,
            args.linewise, ranges.length > 1);
        actions.enterInsertMode(cm, {head: finalHead}, cm.state.vim);
      },
      // delete is a javascript keyword.
      'delete': function(cm, args, ranges) {
        var finalHead, text;
        var vim = cm.state.vim;
        if (!vim.visualBlock) {
          var anchor = ranges[0].anchor,
              head = ranges[0].head;
          if (args.linewise &&
              head.line != cm.firstLine() &&
              anchor.line == cm.lastLine() &&
              anchor.line == head.line - 1) {
            // Special case for dd on last line (and first line).
            if (anchor.line == cm.firstLine()) {
              anchor.ch = 0;
            } else {
              anchor = Pos(anchor.line - 1, lineLength(cm, anchor.line - 1));
            }
          }
          text = cm.getRange(anchor, head);
          cm.replaceRange('', anchor, head);
          finalHead = anchor;
          if (args.linewise) {
            finalHead = motions.moveToFirstNonWhiteSpaceCharacter(cm, anchor);
          }
        } else {
          text = cm.getSelection();
          var replacement = fillArray('', ranges.length);
          cm.replaceSelections(replacement);
          finalHead = ranges[0].anchor;
        }
        vimGlobalState.registerController.pushText(
            args.registerName, 'delete', text,
            args.linewise, vim.visualBlock);
        return clipCursorToContent(cm, finalHead);
      },
      indent: function(cm, args, ranges) {
        var vim = cm.state.vim;
        var startLine = ranges[0].anchor.line;
        var endLine = vim.visualBlock ?
          ranges[ranges.length - 1].anchor.line :
          ranges[0].head.line;
        // In visual mode, n> shifts the selection right n times, instead of
        // shifting n lines right once.
        var repeat = (vim.visualMode) ? args.repeat : 1;
        if (args.linewise) {
          // The only way to delete a newline is to delete until the start of
          // the next line, so in linewise mode evalInput will include the next
          // line. We don't want this in indent, so we go back a line.
          endLine--;
        }
        for (var i = startLine; i <= endLine; i++) {
          for (var j = 0; j < repeat; j++) {
            cm.indentLine(i, args.indentRight);
          }
        }
        return motions.moveToFirstNonWhiteSpaceCharacter(cm, ranges[0].anchor);
      },
      changeCase: function(cm, args, ranges, oldAnchor, newHead) {
        var selections = cm.getSelections();
        var swapped = [];
        var toLower = args.toLower;
        for (var j = 0; j < selections.length; j++) {
          var toSwap = selections[j];
          var text = '';
          if (toLower === true) {
            text = toSwap.toLowerCase();
          } else if (toLower === false) {
            text = toSwap.toUpperCase();
          } else {
            for (var i = 0; i < toSwap.length; i++) {
              var character = toSwap.charAt(i);
              text += isUpperCase(character) ? character.toLowerCase() :
                  character.toUpperCase();
            }
          }
          swapped.push(text);
        }
        cm.replaceSelections(swapped);
        if (args.shouldMoveCursor){
          return newHead;
        } else if (!cm.state.vim.visualMode && args.linewise && ranges[0].anchor.line + 1 == ranges[0].head.line) {
          return motions.moveToFirstNonWhiteSpaceCharacter(cm, oldAnchor);
        } else if (args.linewise){
          return oldAnchor;
        } else {
          return cursorMin(ranges[0].anchor, ranges[0].head);
        }
      },
      yank: function(cm, args, ranges, oldAnchor) {
        var vim = cm.state.vim;
        var text = cm.getSelection();
        var endPos = vim.visualMode
          ? cursorMin(vim.sel.anchor, vim.sel.head, ranges[0].head, ranges[0].anchor)
          : oldAnchor;
        vimGlobalState.registerController.pushText(
            args.registerName, 'yank',
            text, args.linewise, vim.visualBlock);
        return endPos;
      }
    };

    function defineOperator(name, fn) {
      operators[name] = fn;
    }

    var actions = {
      jumpListWalk: function(cm, actionArgs, vim) {
        if (vim.visualMode) {
          return;
        }
        var repeat = actionArgs.repeat;
        var forward = actionArgs.forward;
        var jumpList = vimGlobalState.jumpList;

        var mark = jumpList.move(cm, forward ? repeat : -repeat);
        var markPos = mark ? mark.find() : undefined;
        markPos = markPos ? markPos : cm.getCursor();
        cm.setCursor(markPos);
      },
      scroll: function(cm, actionArgs, vim) {
        if (vim.visualMode) {
          return;
        }
        var repeat = actionArgs.repeat || 1;
        var lineHeight = cm.defaultTextHeight();
        var top = cm.getScrollInfo().top;
        var delta = lineHeight * repeat;
        var newPos = actionArgs.forward ? top + delta : top - delta;
        var cursor = copyCursor(cm.getCursor());
        var cursorCoords = cm.charCoords(cursor, 'local');
        if (actionArgs.forward) {
          if (newPos > cursorCoords.top) {
             cursor.line += (newPos - cursorCoords.top) / lineHeight;
             cursor.line = Math.ceil(cursor.line);
             cm.setCursor(cursor);
             cursorCoords = cm.charCoords(cursor, 'local');
             cm.scrollTo(null, cursorCoords.top);
          } else {
             // Cursor stays within bounds.  Just reposition the scroll window.
             cm.scrollTo(null, newPos);
          }
        } else {
          var newBottom = newPos + cm.getScrollInfo().clientHeight;
          if (newBottom < cursorCoords.bottom) {
             cursor.line -= (cursorCoords.bottom - newBottom) / lineHeight;
             cursor.line = Math.floor(cursor.line);
             cm.setCursor(cursor);
             cursorCoords = cm.charCoords(cursor, 'local');
             cm.scrollTo(
                 null, cursorCoords.bottom - cm.getScrollInfo().clientHeight);
          } else {
             // Cursor stays within bounds.  Just reposition the scroll window.
             cm.scrollTo(null, newPos);
          }
        }
      },
      scrollToCursor: function(cm, actionArgs) {
        var lineNum = cm.getCursor().line;
        var charCoords = cm.charCoords(Pos(lineNum, 0), 'local');
        var height = cm.getScrollInfo().clientHeight;
        var y = charCoords.top;
        var lineHeight = charCoords.bottom - y;
        switch (actionArgs.position) {
          case 'center': y = y - (height / 2) + lineHeight;
            break;
          case 'bottom': y = y - height + lineHeight;
            break;
        }
        cm.scrollTo(null, y);
      },
      replayMacro: function(cm, actionArgs, vim) {
        var registerName = actionArgs.selectedCharacter;
        var repeat = actionArgs.repeat;
        var macroModeState = vimGlobalState.macroModeState;
        if (registerName == '@') {
          registerName = macroModeState.latestRegister;
        }
        while(repeat--){
          executeMacroRegister(cm, vim, macroModeState, registerName);
        }
      },
      enterMacroRecordMode: function(cm, actionArgs) {
        var macroModeState = vimGlobalState.macroModeState;
        var registerName = actionArgs.selectedCharacter;
        macroModeState.enterMacroRecordMode(cm, registerName);
      },
      toggleOverwrite: function(cm) {
        if (!cm.state.overwrite) {
          cm.toggleOverwrite(true);
          cm.setOption('keyMap', 'vim-replace');
          CodeMirror.signal(cm, "vim-mode-change", {mode: "replace"});
        } else {
          cm.toggleOverwrite(false);
          cm.setOption('keyMap', 'vim-insert');
          CodeMirror.signal(cm, "vim-mode-change", {mode: "insert"});
        }
      },
      enterInsertMode: function(cm, actionArgs, vim) {
        if (cm.getOption('readOnly')) { return; }
        vim.insertMode = true;
        vim.insertModeRepeat = actionArgs && actionArgs.repeat || 1;
        var insertAt = (actionArgs) ? actionArgs.insertAt : null;
        var sel = vim.sel;
        var head = actionArgs.head || cm.getCursor('head');
        var height = cm.listSelections().length;
        if (insertAt == 'eol') {
          head = Pos(head.line, lineLength(cm, head.line));
        } else if (insertAt == 'charAfter') {
          head = offsetCursor(head, 0, 1);
        } else if (insertAt == 'firstNonBlank') {
          head = motions.moveToFirstNonWhiteSpaceCharacter(cm, head);
        } else if (insertAt == 'startOfSelectedArea') {
          if (!vim.visualBlock) {
            if (sel.head.line < sel.anchor.line) {
              head = sel.head;
            } else {
              head = Pos(sel.anchor.line, 0);
            }
          } else {
            head = Pos(
                Math.min(sel.head.line, sel.anchor.line),
                Math.min(sel.head.ch, sel.anchor.ch));
            height = Math.abs(sel.head.line - sel.anchor.line) + 1;
          }
        } else if (insertAt == 'endOfSelectedArea') {
          if (!vim.visualBlock) {
            if (sel.head.line >= sel.anchor.line) {
              head = offsetCursor(sel.head, 0, 1);
            } else {
              head = Pos(sel.anchor.line, 0);
            }
          } else {
            head = Pos(
                Math.min(sel.head.line, sel.anchor.line),
                Math.max(sel.head.ch + 1, sel.anchor.ch));
            height = Math.abs(sel.head.line - sel.anchor.line) + 1;
          }
        } else if (insertAt == 'inplace') {
          if (vim.visualMode){
            return;
          }
        }
        cm.setOption('disableInput', false);
        if (actionArgs && actionArgs.replace) {
          // Handle Replace-mode as a special case of insert mode.
          cm.toggleOverwrite(true);
          cm.setOption('keyMap', 'vim-replace');
          CodeMirror.signal(cm, "vim-mode-change", {mode: "replace"});
        } else {
          cm.toggleOverwrite(false);
          cm.setOption('keyMap', 'vim-insert');
          CodeMirror.signal(cm, "vim-mode-change", {mode: "insert"});
        }
        if (!vimGlobalState.macroModeState.isPlaying) {
          // Only record if not replaying.
          cm.on('change', onChange);
          CodeMirror.on(cm.getInputField(), 'keydown', onKeyEventTargetKeyDown);
        }
        if (vim.visualMode) {
          exitVisualMode(cm);
        }
        selectForInsert(cm, head, height);
      },
      toggleVisualMode: function(cm, actionArgs, vim) {
        var repeat = actionArgs.repeat;
        var anchor = cm.getCursor();
        var head;
        // TODO: The repeat should actually select number of characters/lines
        //     equal to the repeat times the size of the previous visual
        //     operation.
        if (!vim.visualMode) {
          // Entering visual mode
          vim.visualMode = true;
          vim.visualLine = !!actionArgs.linewise;
          vim.visualBlock = !!actionArgs.blockwise;
          head = clipCursorToContent(
              cm, Pos(anchor.line, anchor.ch + repeat - 1),
              true /** includeLineBreak */);
          vim.sel = {
            anchor: anchor,
            head: head
          };
          CodeMirror.signal(cm, "vim-mode-change", {mode: "visual", subMode: vim.visualLine ? "linewise" : vim.visualBlock ? "blockwise" : ""});
          updateCmSelection(cm);
          updateMark(cm, vim, '<', cursorMin(anchor, head));
          updateMark(cm, vim, '>', cursorMax(anchor, head));
        } else if (vim.visualLine ^ actionArgs.linewise ||
            vim.visualBlock ^ actionArgs.blockwise) {
          // Toggling between modes
          vim.visualLine = !!actionArgs.linewise;
          vim.visualBlock = !!actionArgs.blockwise;
          CodeMirror.signal(cm, "vim-mode-change", {mode: "visual", subMode: vim.visualLine ? "linewise" : vim.visualBlock ? "blockwise" : ""});
          updateCmSelection(cm);
        } else {
          exitVisualMode(cm);
        }
      },
      reselectLastSelection: function(cm, _actionArgs, vim) {
        var lastSelection = vim.lastSelection;
        if (vim.visualMode) {
          updateLastSelection(cm, vim);
        }
        if (lastSelection) {
          var anchor = lastSelection.anchorMark.find();
          var head = lastSelection.headMark.find();
          if (!anchor || !head) {
            // If the marks have been destroyed due to edits, do nothing.
            return;
          }
          vim.sel = {
            anchor: anchor,
            head: head
          };
          vim.visualMode = true;
          vim.visualLine = lastSelection.visualLine;
          vim.visualBlock = lastSelection.visualBlock;
          updateCmSelection(cm);
          updateMark(cm, vim, '<', cursorMin(anchor, head));
          updateMark(cm, vim, '>', cursorMax(anchor, head));
          CodeMirror.signal(cm, 'vim-mode-change', {
            mode: 'visual',
            subMode: vim.visualLine ? 'linewise' :
                     vim.visualBlock ? 'blockwise' : ''});
        }
      },
      joinLines: function(cm, actionArgs, vim) {
        var curStart, curEnd;
        if (vim.visualMode) {
          curStart = cm.getCursor('anchor');
          curEnd = cm.getCursor('head');
          if (cursorIsBefore(curEnd, curStart)) {
            var tmp = curEnd;
            curEnd = curStart;
            curStart = tmp;
          }
          curEnd.ch = lineLength(cm, curEnd.line) - 1;
        } else {
          // Repeat is the number of lines to join. Minimum 2 lines.
          var repeat = Math.max(actionArgs.repeat, 2);
          curStart = cm.getCursor();
          curEnd = clipCursorToContent(cm, Pos(curStart.line + repeat - 1,
                                               Infinity));
        }
        var finalCh = 0;
        for (var i = curStart.line; i < curEnd.line; i++) {
          finalCh = lineLength(cm, curStart.line);
          var tmp = Pos(curStart.line + 1,
                        lineLength(cm, curStart.line + 1));
          var text = cm.getRange(curStart, tmp);
          text = text.replace(/\n\s*/g, ' ');
          cm.replaceRange(text, curStart, tmp);
        }
        var curFinalPos = Pos(curStart.line, finalCh);
        if (vim.visualMode) {
          exitVisualMode(cm, false);
        }
        cm.setCursor(curFinalPos);
      },
      newLineAndEnterInsertMode: function(cm, actionArgs, vim) {
        vim.insertMode = true;
        var insertAt = copyCursor(cm.getCursor());
        if (insertAt.line === cm.firstLine() && !actionArgs.after) {
          // Special case for inserting newline before start of document.
          cm.replaceRange('\n', Pos(cm.firstLine(), 0));
          cm.setCursor(cm.firstLine(), 0);
        } else {
          insertAt.line = (actionArgs.after) ? insertAt.line :
              insertAt.line - 1;
          insertAt.ch = lineLength(cm, insertAt.line);
          cm.setCursor(insertAt);
          var newlineFn = CodeMirror.commands.newlineAndIndentContinueComment ||
              CodeMirror.commands.newlineAndIndent;
          newlineFn(cm);
        }
        this.enterInsertMode(cm, { repeat: actionArgs.repeat }, vim);
      },
      paste: function(cm, actionArgs, vim) {
        var cur = copyCursor(cm.getCursor());
        var register = vimGlobalState.registerController.getRegister(
            actionArgs.registerName);
        var text = register.toString();
        if (!text) {
          return;
        }
        if (actionArgs.matchIndent) {
          var tabSize = cm.getOption("tabSize");
          // length that considers tabs and tabSize
          var whitespaceLength = function(str) {
            var tabs = (str.split("\t").length - 1);
            var spaces = (str.split(" ").length - 1);
            return tabs * tabSize + spaces * 1;
          };
          var currentLine = cm.getLine(cm.getCursor().line);
          var indent = whitespaceLength(currentLine.match(/^\s*/)[0]);
          // chomp last newline b/c don't want it to match /^\s*/gm
          var chompedText = text.replace(/\n$/, '');
          var wasChomped = text !== chompedText;
          var firstIndent = whitespaceLength(text.match(/^\s*/)[0]);
          var text = chompedText.replace(/^\s*/gm, function(wspace) {
            var newIndent = indent + (whitespaceLength(wspace) - firstIndent);
            if (newIndent < 0) {
              return "";
            }
            else if (cm.getOption("indentWithTabs")) {
              var quotient = Math.floor(newIndent / tabSize);
              return Array(quotient + 1).join('\t');
            }
            else {
              return Array(newIndent + 1).join(' ');
            }
          });
          text += wasChomped ? "\n" : "";
        }
        if (actionArgs.repeat > 1) {
          var text = Array(actionArgs.repeat + 1).join(text);
        }
        var linewise = register.linewise;
        var blockwise = register.blockwise;
        if (linewise) {
          if(vim.visualMode) {
            text = vim.visualLine ? text.slice(0, -1) : '\n' + text.slice(0, text.length - 1) + '\n';
          } else if (actionArgs.after) {
            // Move the newline at the end to the start instead, and paste just
            // before the newline character of the line we are on right now.
            text = '\n' + text.slice(0, text.length - 1);
            cur.ch = lineLength(cm, cur.line);
          } else {
            cur.ch = 0;
          }
        } else {
          if (blockwise) {
            text = text.split('\n');
            for (var i = 0; i < text.length; i++) {
              text[i] = (text[i] == '') ? ' ' : text[i];
            }
          }
          cur.ch += actionArgs.after ? 1 : 0;
        }
        var curPosFinal;
        var idx;
        if (vim.visualMode) {
          //  save the pasted text for reselection if the need arises
          vim.lastPastedText = text;
          var lastSelectionCurEnd;
          var selectedArea = getSelectedAreaRange(cm, vim);
          var selectionStart = selectedArea[0];
          var selectionEnd = selectedArea[1];
          var selectedText = cm.getSelection();
          var selections = cm.listSelections();
          var emptyStrings = new Array(selections.length).join('1').split('1');
          // save the curEnd marker before it get cleared due to cm.replaceRange.
          if (vim.lastSelection) {
            lastSelectionCurEnd = vim.lastSelection.headMark.find();
          }
          // push the previously selected text to unnamed register
          vimGlobalState.registerController.unnamedRegister.setText(selectedText);
          if (blockwise) {
            // first delete the selected text
            cm.replaceSelections(emptyStrings);
            // Set new selections as per the block length of the yanked text
            selectionEnd = Pos(selectionStart.line + text.length-1, selectionStart.ch);
            cm.setCursor(selectionStart);
            selectBlock(cm, selectionEnd);
            cm.replaceSelections(text);
            curPosFinal = selectionStart;
          } else if (vim.visualBlock) {
            cm.replaceSelections(emptyStrings);
            cm.setCursor(selectionStart);
            cm.replaceRange(text, selectionStart, selectionStart);
            curPosFinal = selectionStart;
          } else {
            cm.replaceRange(text, selectionStart, selectionEnd);
            curPosFinal = cm.posFromIndex(cm.indexFromPos(selectionStart) + text.length - 1);
          }
          // restore the the curEnd marker
          if(lastSelectionCurEnd) {
            vim.lastSelection.headMark = cm.setBookmark(lastSelectionCurEnd);
          }
          if (linewise) {
            curPosFinal.ch=0;
          }
        } else {
          if (blockwise) {
            cm.setCursor(cur);
            for (var i = 0; i < text.length; i++) {
              var line = cur.line+i;
              if (line > cm.lastLine()) {
                cm.replaceRange('\n',  Pos(line, 0));
              }
              var lastCh = lineLength(cm, line);
              if (lastCh < cur.ch) {
                extendLineToColumn(cm, line, cur.ch);
              }
            }
            cm.setCursor(cur);
            selectBlock(cm, Pos(cur.line + text.length-1, cur.ch));
            cm.replaceSelections(text);
            curPosFinal = cur;
          } else {
            cm.replaceRange(text, cur);
            // Now fine tune the cursor to where we want it.
            if (linewise && actionArgs.after) {
              curPosFinal = Pos(
              cur.line + 1,
              findFirstNonWhiteSpaceCharacter(cm.getLine(cur.line + 1)));
            } else if (linewise && !actionArgs.after) {
              curPosFinal = Pos(
                cur.line,
                findFirstNonWhiteSpaceCharacter(cm.getLine(cur.line)));
            } else if (!linewise && actionArgs.after) {
              idx = cm.indexFromPos(cur);
              curPosFinal = cm.posFromIndex(idx + text.length - 1);
            } else {
              idx = cm.indexFromPos(cur);
              curPosFinal = cm.posFromIndex(idx + text.length);
            }
          }
        }
        if (vim.visualMode) {
          exitVisualMode(cm, false);
        }
        cm.setCursor(curPosFinal);
      },
      undo: function(cm, actionArgs) {
        cm.operation(function() {
          repeatFn(cm, CodeMirror.commands.undo, actionArgs.repeat)();
          cm.setCursor(cm.getCursor('anchor'));
        });
      },
      redo: function(cm, actionArgs) {
        repeatFn(cm, CodeMirror.commands.redo, actionArgs.repeat)();
      },
      setRegister: function(_cm, actionArgs, vim) {
        vim.inputState.registerName = actionArgs.selectedCharacter;
      },
      setMark: function(cm, actionArgs, vim) {
        var markName = actionArgs.selectedCharacter;
        updateMark(cm, vim, markName, cm.getCursor());
      },
      replace: function(cm, actionArgs, vim) {
        var replaceWith = actionArgs.selectedCharacter;
        var curStart = cm.getCursor();
        var replaceTo;
        var curEnd;
        var selections = cm.listSelections();
        if (vim.visualMode) {
          curStart = cm.getCursor('start');
          curEnd = cm.getCursor('end');
        } else {
          var line = cm.getLine(curStart.line);
          replaceTo = curStart.ch + actionArgs.repeat;
          if (replaceTo > line.length) {
            replaceTo=line.length;
          }
          curEnd = Pos(curStart.line, replaceTo);
        }
        if (replaceWith=='\n') {
          if (!vim.visualMode) cm.replaceRange('', curStart, curEnd);
          // special case, where vim help says to replace by just one line-break
          (CodeMirror.commands.newlineAndIndentContinueComment || CodeMirror.commands.newlineAndIndent)(cm);
        } else {
          var replaceWithStr = cm.getRange(curStart, curEnd);
          //replace all characters in range by selected, but keep linebreaks
          replaceWithStr = replaceWithStr.replace(/[^\n]/g, replaceWith);
          if (vim.visualBlock) {
            // Tabs are split in visua block before replacing
            var spaces = new Array(cm.getOption("tabSize")+1).join(' ');
            replaceWithStr = cm.getSelection();
            replaceWithStr = replaceWithStr.replace(/\t/g, spaces).replace(/[^\n]/g, replaceWith).split('\n');
            cm.replaceSelections(replaceWithStr);
          } else {
            cm.replaceRange(replaceWithStr, curStart, curEnd);
          }
          if (vim.visualMode) {
            curStart = cursorIsBefore(selections[0].anchor, selections[0].head) ?
                         selections[0].anchor : selections[0].head;
            cm.setCursor(curStart);
            exitVisualMode(cm, false);
          } else {
            cm.setCursor(offsetCursor(curEnd, 0, -1));
          }
        }
      },
      incrementNumberToken: function(cm, actionArgs) {
        var cur = cm.getCursor();
        var lineStr = cm.getLine(cur.line);
        var re = /-?\d+/g;
        var match;
        var start;
        var end;
        var numberStr;
        var token;
        while ((match = re.exec(lineStr)) !== null) {
          token = match[0];
          start = match.index;
          end = start + token.length;
          if (cur.ch < end)break;
        }
        if (!actionArgs.backtrack && (end <= cur.ch))return;
        if (token) {
          var increment = actionArgs.increase ? 1 : -1;
          var number = parseInt(token) + (increment * actionArgs.repeat);
          var from = Pos(cur.line, start);
          var to = Pos(cur.line, end);
          numberStr = number.toString();
          cm.replaceRange(numberStr, from, to);
        } else {
          return;
        }
        cm.setCursor(Pos(cur.line, start + numberStr.length - 1));
      },
      repeatLastEdit: function(cm, actionArgs, vim) {
        var lastEditInputState = vim.lastEditInputState;
        if (!lastEditInputState) { return; }
        var repeat = actionArgs.repeat;
        if (repeat && actionArgs.repeatIsExplicit) {
          vim.lastEditInputState.repeatOverride = repeat;
        } else {
          repeat = vim.lastEditInputState.repeatOverride || repeat;
        }
        repeatLastEdit(cm, vim, repeat, false /** repeatForInsert */);
      },
      indent: function(cm, actionArgs) {
        cm.indentLine(cm.getCursor().line, actionArgs.indentRight);
      },
      exitInsertMode: exitInsertMode
    };

    function defineAction(name, fn) {
      actions[name] = fn;
    }

    /*
     * Below are miscellaneous utility functions used by vim.js
     */

    /**
     * Clips cursor to ensure that line is within the buffer's range
     * If includeLineBreak is true, then allow cur.ch == lineLength.
     */
    function clipCursorToContent(cm, cur, includeLineBreak) {
      var line = Math.min(Math.max(cm.firstLine(), cur.line), cm.lastLine() );
      var maxCh = lineLength(cm, line) - 1;
      maxCh = (includeLineBreak) ? maxCh + 1 : maxCh;
      var ch = Math.min(Math.max(0, cur.ch), maxCh);
      return Pos(line, ch);
    }
    function copyArgs(args) {
      var ret = {};
      for (var prop in args) {
        if (args.hasOwnProperty(prop)) {
          ret[prop] = args[prop];
        }
      }
      return ret;
    }
    function offsetCursor(cur, offsetLine, offsetCh) {
      if (typeof offsetLine === 'object') {
        offsetCh = offsetLine.ch;
        offsetLine = offsetLine.line;
      }
      return Pos(cur.line + offsetLine, cur.ch + offsetCh);
    }
    function getOffset(anchor, head) {
      return {
        line: head.line - anchor.line,
        ch: head.line - anchor.line
      };
    }
    function commandMatches(keys, keyMap, context, inputState) {
      // Partial matches are not applied. They inform the key handler
      // that the current key sequence is a subsequence of a valid key
      // sequence, so that the key buffer is not cleared.
      var match, partial = [], full = [];
      for (var i = 0; i < keyMap.length; i++) {
        var command = keyMap[i];
        if (context == 'insert' && command.context != 'insert' ||
            command.context && command.context != context ||
            inputState.operator && command.type == 'action' ||
            !(match = commandMatch(keys, command.keys))) { continue; }
        if (match == 'partial') { partial.push(command); }
        if (match == 'full') { full.push(command); }
      }
      return {
        partial: partial.length && partial,
        full: full.length && full
      };
    }
    function commandMatch(pressed, mapped) {
      if (mapped.slice(-11) == '<character>') {
        // Last character matches anything.
        var prefixLen = mapped.length - 11;
        var pressedPrefix = pressed.slice(0, prefixLen);
        var mappedPrefix = mapped.slice(0, prefixLen);
        return pressedPrefix == mappedPrefix && pressed.length > prefixLen ? 'full' :
               mappedPrefix.indexOf(pressedPrefix) == 0 ? 'partial' : false;
      } else {
        return pressed == mapped ? 'full' :
               mapped.indexOf(pressed) == 0 ? 'partial' : false;
      }
    }
    function lastChar(keys) {
      var match = /^.*(<[\w\-]+>)$/.exec(keys);
      var selectedCharacter = match ? match[1] : keys.slice(-1);
      if (selectedCharacter.length > 1){
        switch(selectedCharacter){
          case '<CR>':
            selectedCharacter='\n';
            break;
          case '<Space>':
            selectedCharacter=' ';
            break;
          default:
            break;
        }
      }
      return selectedCharacter;
    }
    function repeatFn(cm, fn, repeat) {
      return function() {
        for (var i = 0; i < repeat; i++) {
          fn(cm);
        }
      };
    }
    function copyCursor(cur) {
      return Pos(cur.line, cur.ch);
    }
    function cursorEqual(cur1, cur2) {
      return cur1.ch == cur2.ch && cur1.line == cur2.line;
    }
    function cursorIsBefore(cur1, cur2) {
      if (cur1.line < cur2.line) {
        return true;
      }
      if (cur1.line == cur2.line && cur1.ch < cur2.ch) {
        return true;
      }
      return false;
    }
    function cursorMin(cur1, cur2) {
      if (arguments.length > 2) {
        cur2 = cursorMin.apply(undefined, Array.prototype.slice.call(arguments, 1));
      }
      return cursorIsBefore(cur1, cur2) ? cur1 : cur2;
    }
    function cursorMax(cur1, cur2) {
      if (arguments.length > 2) {
        cur2 = cursorMax.apply(undefined, Array.prototype.slice.call(arguments, 1));
      }
      return cursorIsBefore(cur1, cur2) ? cur2 : cur1;
    }
    function cursorIsBetween(cur1, cur2, cur3) {
      // returns true if cur2 is between cur1 and cur3.
      var cur1before2 = cursorIsBefore(cur1, cur2);
      var cur2before3 = cursorIsBefore(cur2, cur3);
      return cur1before2 && cur2before3;
    }
    function lineLength(cm, lineNum) {
      return cm.getLine(lineNum).length;
    }
    function trim(s) {
      if (s.trim) {
        return s.trim();
      }
      return s.replace(/^\s+|\s+$/g, '');
    }
    function escapeRegex(s) {
      return s.replace(/([.?*+$\[\]\/\\(){}|\-])/g, '\\$1');
    }
    function extendLineToColumn(cm, lineNum, column) {
      var endCh = lineLength(cm, lineNum);
      var spaces = new Array(column-endCh+1).join(' ');
      cm.setCursor(Pos(lineNum, endCh));
      cm.replaceRange(spaces, cm.getCursor());
    }
    // This functions selects a rectangular block
    // of text with selectionEnd as any of its corner
    // Height of block:
    // Difference in selectionEnd.line and first/last selection.line
    // Width of the block:
    // Distance between selectionEnd.ch and any(first considered here) selection.ch
    function selectBlock(cm, selectionEnd) {
      var selections = [], ranges = cm.listSelections();
      var head = copyCursor(cm.clipPos(selectionEnd));
      var isClipped = !cursorEqual(selectionEnd, head);
      var curHead = cm.getCursor('head');
      var primIndex = getIndex(ranges, curHead);
      var wasClipped = cursorEqual(ranges[primIndex].head, ranges[primIndex].anchor);
      var max = ranges.length - 1;
      var index = max - primIndex > primIndex ? max : 0;
      var base = ranges[index].anchor;

      var firstLine = Math.min(base.line, head.line);
      var lastLine = Math.max(base.line, head.line);
      var baseCh = base.ch, headCh = head.ch;

      var dir = ranges[index].head.ch - baseCh;
      var newDir = headCh - baseCh;
      if (dir > 0 && newDir <= 0) {
        baseCh++;
        if (!isClipped) { headCh--; }
      } else if (dir < 0 && newDir >= 0) {
        baseCh--;
        if (!wasClipped) { headCh++; }
      } else if (dir < 0 && newDir == -1) {
        baseCh--;
        headCh++;
      }
      for (var line = firstLine; line <= lastLine; line++) {
        var range = {anchor: new Pos(line, baseCh), head: new Pos(line, headCh)};
        selections.push(range);
      }
      primIndex = head.line == lastLine ? selections.length - 1 : 0;
      cm.setSelections(selections);
      selectionEnd.ch = headCh;
      base.ch = baseCh;
      return base;
    }
    function selectForInsert(cm, head, height) {
      var sel = [];
      for (var i = 0; i < height; i++) {
        var lineHead = offsetCursor(head, i, 0);
        sel.push({anchor: lineHead, head: lineHead});
      }
      cm.setSelections(sel, 0);
    }
    // getIndex returns the index of the cursor in the selections.
    function getIndex(ranges, cursor, end) {
      for (var i = 0; i < ranges.length; i++) {
        var atAnchor = end != 'head' && cursorEqual(ranges[i].anchor, cursor);
        var atHead = end != 'anchor' && cursorEqual(ranges[i].head, cursor);
        if (atAnchor || atHead) {
          return i;
        }
      }
      return -1;
    }
    function getSelectedAreaRange(cm, vim) {
      var lastSelection = vim.lastSelection;
      var getCurrentSelectedAreaRange = function() {
        var selections = cm.listSelections();
        var start =  selections[0];
        var end = selections[selections.length-1];
        var selectionStart = cursorIsBefore(start.anchor, start.head) ? start.anchor : start.head;
        var selectionEnd = cursorIsBefore(end.anchor, end.head) ? end.head : end.anchor;
        return [selectionStart, selectionEnd];
      };
      var getLastSelectedAreaRange = function() {
        var selectionStart = cm.getCursor();
        var selectionEnd = cm.getCursor();
        var block = lastSelection.visualBlock;
        if (block) {
          var width = block.width;
          var height = block.height;
          selectionEnd = Pos(selectionStart.line + height, selectionStart.ch + width);
          var selections = [];
          // selectBlock creates a 'proper' rectangular block.
          // We do not want that in all cases, so we manually set selections.
          for (var i = selectionStart.line; i < selectionEnd.line; i++) {
            var anchor = Pos(i, selectionStart.ch);
            var head = Pos(i, selectionEnd.ch);
            var range = {anchor: anchor, head: head};
            selections.push(range);
          }
          cm.setSelections(selections);
        } else {
          var start = lastSelection.anchorMark.find();
          var end = lastSelection.headMark.find();
          var line = end.line - start.line;
          var ch = end.ch - start.ch;
          selectionEnd = {line: selectionEnd.line + line, ch: line ? selectionEnd.ch : ch + selectionEnd.ch};
          if (lastSelection.visualLine) {
            selectionStart = Pos(selectionStart.line, 0);
            selectionEnd = Pos(selectionEnd.line, lineLength(cm, selectionEnd.line));
          }
          cm.setSelection(selectionStart, selectionEnd);
        }
        return [selectionStart, selectionEnd];
      };
      if (!vim.visualMode) {
      // In case of replaying the action.
        return getLastSelectedAreaRange();
      } else {
        return getCurrentSelectedAreaRange();
      }
    }
    // Updates the previous selection with the current selection's values. This
    // should only be called in visual mode.
    function updateLastSelection(cm, vim) {
      var anchor = vim.sel.anchor;
      var head = vim.sel.head;
      // To accommodate the effect of lastPastedText in the last selection
      if (vim.lastPastedText) {
        head = cm.posFromIndex(cm.indexFromPos(anchor) + vim.lastPastedText.length);
        vim.lastPastedText = null;
      }
      vim.lastSelection = {'anchorMark': cm.setBookmark(anchor),
                           'headMark': cm.setBookmark(head),
                           'anchor': copyCursor(anchor),
                           'head': copyCursor(head),
                           'visualMode': vim.visualMode,
                           'visualLine': vim.visualLine,
                           'visualBlock': vim.visualBlock};
    }
    function expandSelection(cm, start, end) {
      var sel = cm.state.vim.sel;
      var head = sel.head;
      var anchor = sel.anchor;
      var tmp;
      if (cursorIsBefore(end, start)) {
        tmp = end;
        end = start;
        start = tmp;
      }
      if (cursorIsBefore(head, anchor)) {
        head = cursorMin(start, head);
        anchor = cursorMax(anchor, end);
      } else {
        anchor = cursorMin(start, anchor);
        head = cursorMax(head, end);
        head = offsetCursor(head, 0, -1);
        if (head.ch == -1 && head.line != cm.firstLine()) {
          head = Pos(head.line - 1, lineLength(cm, head.line - 1));
        }
      }
      return [anchor, head];
    }
    /**
     * Updates the CodeMirror selection to match the provided vim selection.
     * If no arguments are given, it uses the current vim selection state.
     */
    function updateCmSelection(cm, sel, mode) {
      var vim = cm.state.vim;
      sel = sel || vim.sel;
      var mode = mode ||
        vim.visualLine ? 'line' : vim.visualBlock ? 'block' : 'char';
      var cmSel = makeCmSelection(cm, sel, mode);
      cm.setSelections(cmSel.ranges, cmSel.primary);
      updateFakeCursor(cm);
    }
    function makeCmSelection(cm, sel, mode, exclusive) {
      var head = copyCursor(sel.head);
      var anchor = copyCursor(sel.anchor);
      if (mode == 'char') {
        var headOffset = !exclusive && !cursorIsBefore(sel.head, sel.anchor) ? 1 : 0;
        var anchorOffset = cursorIsBefore(sel.head, sel.anchor) ? 1 : 0;
        head = offsetCursor(sel.head, 0, headOffset);
        anchor = offsetCursor(sel.anchor, 0, anchorOffset);
        return {
          ranges: [{anchor: anchor, head: head}],
          primary: 0
        };
      } else if (mode == 'line') {
        if (!cursorIsBefore(sel.head, sel.anchor)) {
          anchor.ch = 0;

          var lastLine = cm.lastLine();
          if (head.line > lastLine) {
            head.line = lastLine;
          }
          head.ch = lineLength(cm, head.line);
        } else {
          head.ch = 0;
          anchor.ch = lineLength(cm, anchor.line);
        }
        return {
          ranges: [{anchor: anchor, head: head}],
          primary: 0
        };
      } else if (mode == 'block') {
        var top = Math.min(anchor.line, head.line),
            left = Math.min(anchor.ch, head.ch),
            bottom = Math.max(anchor.line, head.line),
            right = Math.max(anchor.ch, head.ch) + 1;
        var height = bottom - top + 1;
        var primary = head.line == top ? 0 : height - 1;
        var ranges = [];
        for (var i = 0; i < height; i++) {
          ranges.push({
            anchor: Pos(top + i, left),
            head: Pos(top + i, right)
          });
        }
        return {
          ranges: ranges,
          primary: primary
        };
      }
    }
    function getHead(cm) {
      var cur = cm.getCursor('head');
      if (cm.getSelection().length == 1) {
        // Small corner case when only 1 character is selected. The "real"
        // head is the left of head and anchor.
        cur = cursorMin(cur, cm.getCursor('anchor'));
      }
      return cur;
    }

    /**
     * If moveHead is set to false, the CodeMirror selection will not be
     * touched. The caller assumes the responsibility of putting the cursor
    * in the right place.
     */
    function exitVisualMode(cm, moveHead) {
      var vim = cm.state.vim;
      if (moveHead !== false) {
        cm.setCursor(clipCursorToContent(cm, vim.sel.head));
      }
      updateLastSelection(cm, vim);
      vim.visualMode = false;
      vim.visualLine = false;
      vim.visualBlock = false;
      CodeMirror.signal(cm, "vim-mode-change", {mode: "normal"});
      if (vim.fakeCursor) {
        vim.fakeCursor.clear();
      }
    }

    // Remove any trailing newlines from the selection. For
    // example, with the caret at the start of the last word on the line,
    // 'dw' should word, but not the newline, while 'w' should advance the
    // caret to the first character of the next line.
    function clipToLine(cm, curStart, curEnd) {
      var selection = cm.getRange(curStart, curEnd);
      // Only clip if the selection ends with trailing newline + whitespace
      if (/\n\s*$/.test(selection)) {
        var lines = selection.split('\n');
        // We know this is all whitespace.
        lines.pop();

        // Cases:
        // 1. Last word is an empty line - do not clip the trailing '\n'
        // 2. Last word is not an empty line - clip the trailing '\n'
        var line;
        // Find the line containing the last word, and clip all whitespace up
        // to it.
        for (var line = lines.pop(); lines.length > 0 && line && isWhiteSpaceString(line); line = lines.pop()) {
          curEnd.line--;
          curEnd.ch = 0;
        }
        // If the last word is not an empty line, clip an additional newline
        if (line) {
          curEnd.line--;
          curEnd.ch = lineLength(cm, curEnd.line);
        } else {
          curEnd.ch = 0;
        }
      }
    }

    // Expand the selection to line ends.
    function expandSelectionToLine(_cm, curStart, curEnd) {
      curStart.ch = 0;
      curEnd.ch = 0;
      curEnd.line++;
    }

    function findFirstNonWhiteSpaceCharacter(text) {
      if (!text) {
        return 0;
      }
      var firstNonWS = text.search(/\S/);
      return firstNonWS == -1 ? text.length : firstNonWS;
    }

    function expandWordUnderCursor(cm, inclusive, _forward, bigWord, noSymbol) {
      var cur = getHead(cm);
      var line = cm.getLine(cur.line);
      var idx = cur.ch;

      // Seek to first word or non-whitespace character, depending on if
      // noSymbol is true.
      var test = noSymbol ? wordCharTest[0] : bigWordCharTest [0];
      while (!test(line.charAt(idx))) {
        idx++;
        if (idx >= line.length) { return null; }
      }

      if (bigWord) {
        test = bigWordCharTest[0];
      } else {
        test = wordCharTest[0];
        if (!test(line.charAt(idx))) {
          test = wordCharTest[1];
        }
      }

      var end = idx, start = idx;
      while (test(line.charAt(end)) && end < line.length) { end++; }
      while (test(line.charAt(start)) && start >= 0) { start--; }
      start++;

      if (inclusive) {
        // If present, include all whitespace after word.
        // Otherwise, include all whitespace before word, except indentation.
        var wordEnd = end;
        while (/\s/.test(line.charAt(end)) && end < line.length) { end++; }
        if (wordEnd == end) {
          var wordStart = start;
          while (/\s/.test(line.charAt(start - 1)) && start > 0) { start--; }
          if (!start) { start = wordStart; }
        }
      }
      return { start: Pos(cur.line, start), end: Pos(cur.line, end) };
    }

    function recordJumpPosition(cm, oldCur, newCur) {
      if (!cursorEqual(oldCur, newCur)) {
        vimGlobalState.jumpList.add(cm, oldCur, newCur);
      }
    }

    function recordLastCharacterSearch(increment, args) {
        vimGlobalState.lastCharacterSearch.increment = increment;
        vimGlobalState.lastCharacterSearch.forward = args.forward;
        vimGlobalState.lastCharacterSearch.selectedCharacter = args.selectedCharacter;
    }

    var symbolToMode = {
        '(': 'bracket', ')': 'bracket', '{': 'bracket', '}': 'bracket',
        '[': 'section', ']': 'section',
        '*': 'comment', '/': 'comment',
        'm': 'method', 'M': 'method',
        '#': 'preprocess'
    };
    var findSymbolModes = {
      bracket: {
        isComplete: function(state) {
          if (state.nextCh === state.symb) {
            state.depth++;
            if (state.depth >= 1)return true;
          } else if (state.nextCh === state.reverseSymb) {
            state.depth--;
          }
          return false;
        }
      },
      section: {
        init: function(state) {
          state.curMoveThrough = true;
          state.symb = (state.forward ? ']' : '[') === state.symb ? '{' : '}';
        },
        isComplete: function(state) {
          return state.index === 0 && state.nextCh === state.symb;
        }
      },
      comment: {
        isComplete: function(state) {
          var found = state.lastCh === '*' && state.nextCh === '/';
          state.lastCh = state.nextCh;
          return found;
        }
      },
      // TODO: The original Vim implementation only operates on level 1 and 2.
      // The current implementation doesn't check for code block level and
      // therefore it operates on any levels.
      method: {
        init: function(state) {
          state.symb = (state.symb === 'm' ? '{' : '}');
          state.reverseSymb = state.symb === '{' ? '}' : '{';
        },
        isComplete: function(state) {
          if (state.nextCh === state.symb)return true;
          return false;
        }
      },
      preprocess: {
        init: function(state) {
          state.index = 0;
        },
        isComplete: function(state) {
          if (state.nextCh === '#') {
            var token = state.lineText.match(/#(\w+)/)[1];
            if (token === 'endif') {
              if (state.forward && state.depth === 0) {
                return true;
              }
              state.depth++;
            } else if (token === 'if') {
              if (!state.forward && state.depth === 0) {
                return true;
              }
              state.depth--;
            }
            if (token === 'else' && state.depth === 0)return true;
          }
          return false;
        }
      }
    };
    function findSymbol(cm, repeat, forward, symb) {
      var cur = copyCursor(cm.getCursor());
      var increment = forward ? 1 : -1;
      var endLine = forward ? cm.lineCount() : -1;
      var curCh = cur.ch;
      var line = cur.line;
      var lineText = cm.getLine(line);
      var state = {
        lineText: lineText,
        nextCh: lineText.charAt(curCh),
        lastCh: null,
        index: curCh,
        symb: symb,
        reverseSymb: (forward ?  { ')': '(', '}': '{' } : { '(': ')', '{': '}' })[symb],
        forward: forward,
        depth: 0,
        curMoveThrough: false
      };
      var mode = symbolToMode[symb];
      if (!mode)return cur;
      var init = findSymbolModes[mode].init;
      var isComplete = findSymbolModes[mode].isComplete;
      if (init) { init(state); }
      while (line !== endLine && repeat) {
        state.index += increment;
        state.nextCh = state.lineText.charAt(state.index);
        if (!state.nextCh) {
          line += increment;
          state.lineText = cm.getLine(line) || '';
          if (increment > 0) {
            state.index = 0;
          } else {
            var lineLen = state.lineText.length;
            state.index = (lineLen > 0) ? (lineLen-1) : 0;
          }
          state.nextCh = state.lineText.charAt(state.index);
        }
        if (isComplete(state)) {
          cur.line = line;
          cur.ch = state.index;
          repeat--;
        }
      }
      if (state.nextCh || state.curMoveThrough) {
        return Pos(line, state.index);
      }
      return cur;
    }

    /**
     * Returns the boundaries of the next word. If the cursor in the middle of
     * the word, then returns the boundaries of the current word, starting at
     * the cursor. If the cursor is at the start/end of a word, and we are going
     * forward/backward, respectively, find the boundaries of the next word.
     *
     * @param {CodeMirror} cm CodeMirror object.
     * @param {Cursor} cur The cursor position.
     * @param {boolean} forward True to search forward. False to search
     *     backward.
     * @param {boolean} bigWord True if punctuation count as part of the word.
     *     False if only [a-zA-Z0-9] characters count as part of the word.
     * @param {boolean} emptyLineIsWord True if empty lines should be treated
     *     as words.
     * @return {Object{from:number, to:number, line: number}} The boundaries of
     *     the word, or null if there are no more words.
     */
    function findWord(cm, cur, forward, bigWord, emptyLineIsWord) {
      var lineNum = cur.line;
      var pos = cur.ch;
      var line = cm.getLine(lineNum);
      var dir = forward ? 1 : -1;
      var charTests = bigWord ? bigWordCharTest: wordCharTest;

      if (emptyLineIsWord && line == '') {
        lineNum += dir;
        line = cm.getLine(lineNum);
        if (!isLine(cm, lineNum)) {
          return null;
        }
        pos = (forward) ? 0 : line.length;
      }

      while (true) {
        if (emptyLineIsWord && line == '') {
          return { from: 0, to: 0, line: lineNum };
        }
        var stop = (dir > 0) ? line.length : -1;
        var wordStart = stop, wordEnd = stop;
        // Find bounds of next word.
        while (pos != stop) {
          var foundWord = false;
          for (var i = 0; i < charTests.length && !foundWord; ++i) {
            if (charTests[i](line.charAt(pos))) {
              wordStart = pos;
              // Advance to end of word.
              while (pos != stop && charTests[i](line.charAt(pos))) {
                pos += dir;
              }
              wordEnd = pos;
              foundWord = wordStart != wordEnd;
              if (wordStart == cur.ch && lineNum == cur.line &&
                  wordEnd == wordStart + dir) {
                // We started at the end of a word. Find the next one.
                continue;
              } else {
                return {
                  from: Math.min(wordStart, wordEnd + 1),
                  to: Math.max(wordStart, wordEnd),
                  line: lineNum };
              }
            }
          }
          if (!foundWord) {
            pos += dir;
          }
        }
        // Advance to next/prev line.
        lineNum += dir;
        if (!isLine(cm, lineNum)) {
          return null;
        }
        line = cm.getLine(lineNum);
        pos = (dir > 0) ? 0 : line.length;
      }
    }

    /**
     * @param {CodeMirror} cm CodeMirror object.
     * @param {Pos} cur The position to start from.
     * @param {int} repeat Number of words to move past.
     * @param {boolean} forward True to search forward. False to search
     *     backward.
     * @param {boolean} wordEnd True to move to end of word. False to move to
     *     beginning of word.
     * @param {boolean} bigWord True if punctuation count as part of the word.
     *     False if only alphabet characters count as part of the word.
     * @return {Cursor} The position the cursor should move to.
     */
    function moveToWord(cm, cur, repeat, forward, wordEnd, bigWord) {
      var curStart = copyCursor(cur);
      var words = [];
      if (forward && !wordEnd || !forward && wordEnd) {
        repeat++;
      }
      // For 'e', empty lines are not considered words, go figure.
      var emptyLineIsWord = !(forward && wordEnd);
      for (var i = 0; i < repeat; i++) {
        var word = findWord(cm, cur, forward, bigWord, emptyLineIsWord);
        if (!word) {
          var eodCh = lineLength(cm, cm.lastLine());
          words.push(forward
              ? {line: cm.lastLine(), from: eodCh, to: eodCh}
              : {line: 0, from: 0, to: 0});
          break;
        }
        words.push(word);
        cur = Pos(word.line, forward ? (word.to - 1) : word.from);
      }
      var shortCircuit = words.length != repeat;
      var firstWord = words[0];
      var lastWord = words.pop();
      if (forward && !wordEnd) {
        // w
        if (!shortCircuit && (firstWord.from != curStart.ch || firstWord.line != curStart.line)) {
          // We did not start in the middle of a word. Discard the extra word at the end.
          lastWord = words.pop();
        }
        return Pos(lastWord.line, lastWord.from);
      } else if (forward && wordEnd) {
        return Pos(lastWord.line, lastWord.to - 1);
      } else if (!forward && wordEnd) {
        // ge
        if (!shortCircuit && (firstWord.to != curStart.ch || firstWord.line != curStart.line)) {
          // We did not start in the middle of a word. Discard the extra word at the end.
          lastWord = words.pop();
        }
        return Pos(lastWord.line, lastWord.to);
      } else {
        // b
        return Pos(lastWord.line, lastWord.from);
      }
    }

    function moveToCharacter(cm, repeat, forward, character) {
      var cur = cm.getCursor();
      var start = cur.ch;
      var idx;
      for (var i = 0; i < repeat; i ++) {
        var line = cm.getLine(cur.line);
        idx = charIdxInLine(start, line, character, forward, true);
        if (idx == -1) {
          return null;
        }
        start = idx;
      }
      return Pos(cm.getCursor().line, idx);
    }

    function moveToColumn(cm, repeat) {
      // repeat is always >= 1, so repeat - 1 always corresponds
      // to the column we want to go to.
      var line = cm.getCursor().line;
      return clipCursorToContent(cm, Pos(line, repeat - 1));
    }

    function updateMark(cm, vim, markName, pos) {
      if (!inArray(markName, validMarks)) {
        return;
      }
      if (vim.marks[markName]) {
        vim.marks[markName].clear();
      }
      vim.marks[markName] = cm.setBookmark(pos);
    }

    function charIdxInLine(start, line, character, forward, includeChar) {
      // Search for char in line.
      // motion_options: {forward, includeChar}
      // If includeChar = true, include it too.
      // If forward = true, search forward, else search backwards.
      // If char is not found on this line, do nothing
      var idx;
      if (forward) {
        idx = line.indexOf(character, start + 1);
        if (idx != -1 && !includeChar) {
          idx -= 1;
        }
      } else {
        idx = line.lastIndexOf(character, start - 1);
        if (idx != -1 && !includeChar) {
          idx += 1;
        }
      }
      return idx;
    }

    function findParagraph(cm, head, repeat, dir, inclusive) {
      var line = head.line;
      var min = cm.firstLine();
      var max = cm.lastLine();
      var start, end, i = line;
      function isEmpty(i) { return !cm.getLine(i); }
      function isBoundary(i, dir, any) {
        if (any) { return isEmpty(i) != isEmpty(i + dir); }
        return !isEmpty(i) && isEmpty(i + dir);
      }
      if (dir) {
        while (min <= i && i <= max && repeat > 0) {
          if (isBoundary(i, dir)) { repeat--; }
          i += dir;
        }
        return new Pos(i, 0);
      }

      var vim = cm.state.vim;
      if (vim.visualLine && isBoundary(line, 1, true)) {
        var anchor = vim.sel.anchor;
        if (isBoundary(anchor.line, -1, true)) {
          if (!inclusive || anchor.line != line) {
            line += 1;
          }
        }
      }
      var startState = isEmpty(line);
      for (i = line; i <= max && repeat; i++) {
        if (isBoundary(i, 1, true)) {
          if (!inclusive || isEmpty(i) != startState) {
            repeat--;
          }
        }
      }
      end = new Pos(i, 0);
      // select boundary before paragraph for the last one
      if (i > max && !startState) { startState = true; }
      else { inclusive = false; }
      for (i = line; i > min; i--) {
        if (!inclusive || isEmpty(i) == startState || i == line) {
          if (isBoundary(i, -1, true)) { break; }
        }
      }
      start = new Pos(i, 0);
      return { start: start, end: end };
    }

    // TODO: perhaps this finagling of start and end positions belonds
    // in codemirror/replaceRange?
    function selectCompanionObject(cm, head, symb, inclusive) {
      var cur = head, start, end;

      var bracketRegexp = ({
        '(': /[()]/, ')': /[()]/,
        '[': /[[\]]/, ']': /[[\]]/,
        '{': /[{}]/, '}': /[{}]/})[symb];
      var openSym = ({
        '(': '(', ')': '(',
        '[': '[', ']': '[',
        '{': '{', '}': '{'})[symb];
      var curChar = cm.getLine(cur.line).charAt(cur.ch);
      // Due to the behavior of scanForBracket, we need to add an offset if the
      // cursor is on a matching open bracket.
      var offset = curChar === openSym ? 1 : 0;

      start = cm.scanForBracket(Pos(cur.line, cur.ch + offset), -1, null, {'bracketRegex': bracketRegexp});
      end = cm.scanForBracket(Pos(cur.line, cur.ch + offset), 1, null, {'bracketRegex': bracketRegexp});

      if (!start || !end) {
        return { start: cur, end: cur };
      }

      start = start.pos;
      end = end.pos;

      if ((start.line == end.line && start.ch > end.ch)
          || (start.line > end.line)) {
        var tmp = start;
        start = end;
        end = tmp;
      }

      if (inclusive) {
        end.ch += 1;
      } else {
        start.ch += 1;
      }

      return { start: start, end: end };
    }

    // Takes in a symbol and a cursor and tries to simulate text objects that
    // have identical opening and closing symbols
    // TODO support across multiple lines
    function findBeginningAndEnd(cm, head, symb, inclusive) {
      var cur = copyCursor(head);
      var line = cm.getLine(cur.line);
      var chars = line.split('');
      var start, end, i, len;
      var firstIndex = chars.indexOf(symb);

      // the decision tree is to always look backwards for the beginning first,
      // but if the cursor is in front of the first instance of the symb,
      // then move the cursor forward
      if (cur.ch < firstIndex) {
        cur.ch = firstIndex;
        // Why is this line even here???
        // cm.setCursor(cur.line, firstIndex+1);
      }
      // otherwise if the cursor is currently on the closing symbol
      else if (firstIndex < cur.ch && chars[cur.ch] == symb) {
        end = cur.ch; // assign end to the current cursor
        --cur.ch; // make sure to look backwards
      }

      // if we're currently on the symbol, we've got a start
      if (chars[cur.ch] == symb && !end) {
        start = cur.ch + 1; // assign start to ahead of the cursor
      } else {
        // go backwards to find the start
        for (i = cur.ch; i > -1 && !start; i--) {
          if (chars[i] == symb) {
            start = i + 1;
          }
        }
      }

      // look forwards for the end symbol
      if (start && !end) {
        for (i = start, len = chars.length; i < len && !end; i++) {
          if (chars[i] == symb) {
            end = i;
          }
        }
      }

      // nothing found
      if (!start || !end) {
        return { start: cur, end: cur };
      }

      // include the symbols
      if (inclusive) {
        --start; ++end;
      }

      return {
        start: Pos(cur.line, start),
        end: Pos(cur.line, end)
      };
    }

    // Search functions
    defineOption('pcre', true, 'boolean');
    function SearchState() {}
    SearchState.prototype = {
      getQuery: function() {
        return vimGlobalState.query;
      },
      setQuery: function(query) {
        vimGlobalState.query = query;
      },
      getOverlay: function() {
        return this.searchOverlay;
      },
      setOverlay: function(overlay) {
        this.searchOverlay = overlay;
      },
      isReversed: function() {
        return vimGlobalState.isReversed;
      },
      setReversed: function(reversed) {
        vimGlobalState.isReversed = reversed;
      },
      getScrollbarAnnotate: function() {
        return this.annotate;
      },
      setScrollbarAnnotate: function(annotate) {
        this.annotate = annotate;
      }
    };
    function getSearchState(cm) {
      var vim = cm.state.vim;
      return vim.searchState_ || (vim.searchState_ = new SearchState());
    }
    function dialog(cm, template, shortText, onClose, options) {
      if (cm.openDialog) {
        cm.openDialog(template, onClose, { bottom: true, value: options.value,
            onKeyDown: options.onKeyDown, onKeyUp: options.onKeyUp,
            selectValueOnOpen: false});
      }
      else {
        onClose(prompt(shortText, ''));
      }
    }
    function splitBySlash(argString) {
      var slashes = findUnescapedSlashes(argString) || [];
      if (!slashes.length) return [];
      var tokens = [];
      // in case of strings like foo/bar
      if (slashes[0] !== 0) return;
      for (var i = 0; i < slashes.length; i++) {
        if (typeof slashes[i] == 'number')
          tokens.push(argString.substring(slashes[i] + 1, slashes[i+1]));
      }
      return tokens;
    }

    function findUnescapedSlashes(str) {
      var escapeNextChar = false;
      var slashes = [];
      for (var i = 0; i < str.length; i++) {
        var c = str.charAt(i);
        if (!escapeNextChar && c == '/') {
          slashes.push(i);
        }
        escapeNextChar = !escapeNextChar && (c == '\\');
      }
      return slashes;
    }

    // Translates a search string from ex (vim) syntax into javascript form.
    function translateRegex(str) {
      // When these match, add a '\' if unescaped or remove one if escaped.
      var specials = '|(){';
      // Remove, but never add, a '\' for these.
      var unescape = '}';
      var escapeNextChar = false;
      var out = [];
      for (var i = -1; i < str.length; i++) {
        var c = str.charAt(i) || '';
        var n = str.charAt(i+1) || '';
        var specialComesNext = (n && specials.indexOf(n) != -1);
        if (escapeNextChar) {
          if (c !== '\\' || !specialComesNext) {
            out.push(c);
          }
          escapeNextChar = false;
        } else {
          if (c === '\\') {
            escapeNextChar = true;
            // Treat the unescape list as special for removing, but not adding '\'.
            if (n && unescape.indexOf(n) != -1) {
              specialComesNext = true;
            }
            // Not passing this test means removing a '\'.
            if (!specialComesNext || n === '\\') {
              out.push(c);
            }
          } else {
            out.push(c);
            if (specialComesNext && n !== '\\') {
              out.push('\\');
            }
          }
        }
      }
      return out.join('');
    }

    // Translates the replace part of a search and replace from ex (vim) syntax into
    // javascript form.  Similar to translateRegex, but additionally fixes back references
    // (translates '\[0..9]' to '$[0..9]') and follows different rules for escaping '$'.
    var charUnescapes = {'\\n': '\n', '\\r': '\r', '\\t': '\t'};
    function translateRegexReplace(str) {
      var escapeNextChar = false;
      var out = [];
      for (var i = -1; i < str.length; i++) {
        var c = str.charAt(i) || '';
        var n = str.charAt(i+1) || '';
        if (charUnescapes[c + n]) {
          out.push(charUnescapes[c+n]);
          i++;
        } else if (escapeNextChar) {
          // At any point in the loop, escapeNextChar is true if the previous
          // character was a '\' and was not escaped.
          out.push(c);
          escapeNextChar = false;
        } else {
          if (c === '\\') {
            escapeNextChar = true;
            if ((isNumber(n) || n === '$')) {
              out.push('$');
            } else if (n !== '/' && n !== '\\') {
              out.push('\\');
            }
          } else {
            if (c === '$') {
              out.push('$');
            }
            out.push(c);
            if (n === '/') {
              out.push('\\');
            }
          }
        }
      }
      return out.join('');
    }

    // Unescape \ and / in the replace part, for PCRE mode.
    var unescapes = {'\\/': '/', '\\\\': '\\', '\\n': '\n', '\\r': '\r', '\\t': '\t'};
    function unescapeRegexReplace(str) {
      var stream = new CodeMirror.StringStream(str);
      var output = [];
      while (!stream.eol()) {
        // Search for \.
        while (stream.peek() && stream.peek() != '\\') {
          output.push(stream.next());
        }
        var matched = false;
        for (var matcher in unescapes) {
          if (stream.match(matcher, true)) {
            matched = true;
            output.push(unescapes[matcher]);
            break;
          }
        }
        if (!matched) {
          // Don't change anything
          output.push(stream.next());
        }
      }
      return output.join('');
    }

    /**
     * Extract the regular expression from the query and return a Regexp object.
     * Returns null if the query is blank.
     * If ignoreCase is passed in, the Regexp object will have the 'i' flag set.
     * If smartCase is passed in, and the query contains upper case letters,
     *   then ignoreCase is overridden, and the 'i' flag will not be set.
     * If the query contains the /i in the flag part of the regular expression,
     *   then both ignoreCase and smartCase are ignored, and 'i' will be passed
     *   through to the Regex object.
     */
    function parseQuery(query, ignoreCase, smartCase) {
      // First update the last search register
      var lastSearchRegister = vimGlobalState.registerController.getRegister('/');
      lastSearchRegister.setText(query);
      // Check if the query is already a regex.
      if (query instanceof RegExp) { return query; }
      // First try to extract regex + flags from the input. If no flags found,
      // extract just the regex. IE does not accept flags directly defined in
      // the regex string in the form /regex/flags
      var slashes = findUnescapedSlashes(query);
      var regexPart;
      var forceIgnoreCase;
      if (!slashes.length) {
        // Query looks like 'regexp'
        regexPart = query;
      } else {
        // Query looks like 'regexp/...'
        regexPart = query.substring(0, slashes[0]);
        var flagsPart = query.substring(slashes[0]);
        forceIgnoreCase = (flagsPart.indexOf('i') != -1);
      }
      if (!regexPart) {
        return null;
      }
      if (!getOption('pcre')) {
        regexPart = translateRegex(regexPart);
      }
      if (smartCase) {
        ignoreCase = (/^[^A-Z]*$/).test(regexPart);
      }
      var regexp = new RegExp(regexPart,
          (ignoreCase || forceIgnoreCase) ? 'i' : undefined);
      return regexp;
    }
    function showConfirm(cm, text) {
      if (cm.openNotification) {
        cm.openNotification('<span style="color: red">' + text + '</span>',
                            {bottom: true, duration: 5000});
      } else {
        alert(text);
      }
    }
    function makePrompt(prefix, desc) {
      var raw = '<span style="font-family: monospace; white-space: pre">' +
          (prefix || "") + '<input type="text"></span>';
      if (desc)
        raw += ' <span style="color: #888">' + desc + '</span>';
      return raw;
    }
    var searchPromptDesc = '(Javascript regexp)';
    function showPrompt(cm, options) {
      var shortText = (options.prefix || '') + ' ' + (options.desc || '');
      var prompt = makePrompt(options.prefix, options.desc);
      dialog(cm, prompt, shortText, options.onClose, options);
    }
    function regexEqual(r1, r2) {
      if (r1 instanceof RegExp && r2 instanceof RegExp) {
          var props = ['global', 'multiline', 'ignoreCase', 'source'];
          for (var i = 0; i < props.length; i++) {
              var prop = props[i];
              if (r1[prop] !== r2[prop]) {
                  return false;
              }
          }
          return true;
      }
      return false;
    }
    // Returns true if the query is valid.
    function updateSearchQuery(cm, rawQuery, ignoreCase, smartCase) {
      if (!rawQuery) {
        return;
      }
      var state = getSearchState(cm);
      var query = parseQuery(rawQuery, !!ignoreCase, !!smartCase);
      if (!query) {
        return;
      }
      highlightSearchMatches(cm, query);
      if (regexEqual(query, state.getQuery())) {
        return query;
      }
      state.setQuery(query);
      return query;
    }
    function searchOverlay(query) {
      if (query.source.charAt(0) == '^') {
        var matchSol = true;
      }
      return {
        token: function(stream) {
          if (matchSol && !stream.sol()) {
            stream.skipToEnd();
            return;
          }
          var match = stream.match(query, false);
          if (match) {
            if (match[0].length == 0) {
              // Matched empty string, skip to next.
              stream.next();
              return 'searching';
            }
            if (!stream.sol()) {
              // Backtrack 1 to match \b
              stream.backUp(1);
              if (!query.exec(stream.next() + match[0])) {
                stream.next();
                return null;
              }
            }
            stream.match(query);
            return 'searching';
          }
          while (!stream.eol()) {
            stream.next();
            if (stream.match(query, false)) break;
          }
        },
        query: query
      };
    }
    function highlightSearchMatches(cm, query) {
      var searchState = getSearchState(cm);
      var overlay = searchState.getOverlay();
      if (!overlay || query != overlay.query) {
        if (overlay) {
          cm.removeOverlay(overlay);
        }
        overlay = searchOverlay(query);
        cm.addOverlay(overlay);
        if (cm.showMatchesOnScrollbar) {
          if (searchState.getScrollbarAnnotate()) {
            searchState.getScrollbarAnnotate().clear();
          }
          searchState.setScrollbarAnnotate(cm.showMatchesOnScrollbar(query));
        }
        searchState.setOverlay(overlay);
      }
    }
    function findNext(cm, prev, query, repeat) {
      if (repeat === undefined) { repeat = 1; }
      return cm.operation(function() {
        var pos = cm.getCursor();
        var cursor = cm.getSearchCursor(query, pos);
        for (var i = 0; i < repeat; i++) {
          var found = cursor.find(prev);
          if (i == 0 && found && cursorEqual(cursor.from(), pos)) { found = cursor.find(prev); }
          if (!found) {
            // SearchCursor may have returned null because it hit EOF, wrap
            // around and try again.
            cursor = cm.getSearchCursor(query,
                (prev) ? Pos(cm.lastLine()) : Pos(cm.firstLine(), 0) );
            if (!cursor.find(prev)) {
              return;
            }
          }
        }
        return cursor.from();
      });
    }
    function clearSearchHighlight(cm) {
      var state = getSearchState(cm);
      cm.removeOverlay(getSearchState(cm).getOverlay());
      state.setOverlay(null);
      if (state.getScrollbarAnnotate()) {
        state.getScrollbarAnnotate().clear();
        state.setScrollbarAnnotate(null);
      }
    }
    /**
     * Check if pos is in the specified range, INCLUSIVE.
     * Range can be specified with 1 or 2 arguments.
     * If the first range argument is an array, treat it as an array of line
     * numbers. Match pos against any of the lines.
     * If the first range argument is a number,
     *   if there is only 1 range argument, check if pos has the same line
     *       number
     *   if there are 2 range arguments, then check if pos is in between the two
     *       range arguments.
     */
    function isInRange(pos, start, end) {
      if (typeof pos != 'number') {
        // Assume it is a cursor position. Get the line number.
        pos = pos.line;
      }
      if (start instanceof Array) {
        return inArray(pos, start);
      } else {
        if (end) {
          return (pos >= start && pos <= end);
        } else {
          return pos == start;
        }
      }
    }
    function getUserVisibleLines(cm) {
      var scrollInfo = cm.getScrollInfo();
      var occludeToleranceTop = 6;
      var occludeToleranceBottom = 10;
      var from = cm.coordsChar({left:0, top: occludeToleranceTop + scrollInfo.top}, 'local');
      var bottomY = scrollInfo.clientHeight - occludeToleranceBottom + scrollInfo.top;
      var to = cm.coordsChar({left:0, top: bottomY}, 'local');
      return {top: from.line, bottom: to.line};
    }

    function getMarkPos(cm, vim, markName) {
      if (markName == '\'') {
        var history = cm.doc.history.done;
        var event = history[history.length - 2];
        return event && event.ranges && event.ranges[0].head;
      }

      var mark = vim.marks[markName];
      return mark && mark.find();
    }

    var ExCommandDispatcher = function() {
      this.buildCommandMap_();
    };
    ExCommandDispatcher.prototype = {
      processCommand: function(cm, input, opt_params) {
        var that = this;
        cm.operation(function () {
          cm.curOp.isVimOp = true;
          that._processCommand(cm, input, opt_params);
        });
      },
      _processCommand: function(cm, input, opt_params) {
        var vim = cm.state.vim;
        var commandHistoryRegister = vimGlobalState.registerController.getRegister(':');
        var previousCommand = commandHistoryRegister.toString();
        if (vim.visualMode) {
          exitVisualMode(cm);
        }
        var inputStream = new CodeMirror.StringStream(input);
        // update ": with the latest command whether valid or invalid
        commandHistoryRegister.setText(input);
        var params = opt_params || {};
        params.input = input;
        try {
          this.parseInput_(cm, inputStream, params);
        } catch(e) {
          showConfirm(cm, e);
          throw e;
        }
        var command;
        var commandName;
        if (!params.commandName) {
          // If only a line range is defined, move to the line.
          if (params.line !== undefined) {
            commandName = 'move';
          }
        } else {
          command = this.matchCommand_(params.commandName);
          if (command) {
            commandName = command.name;
            if (command.excludeFromCommandHistory) {
              commandHistoryRegister.setText(previousCommand);
            }
            this.parseCommandArgs_(inputStream, params, command);
            if (command.type == 'exToKey') {
              // Handle Ex to Key mapping.
              for (var i = 0; i < command.toKeys.length; i++) {
                CodeMirror.Vim.handleKey(cm, command.toKeys[i], 'mapping');
              }
              return;
            } else if (command.type == 'exToEx') {
              // Handle Ex to Ex mapping.
              this.processCommand(cm, command.toInput);
              return;
            }
          }
        }
        if (!commandName) {
          showConfirm(cm, 'Not an editor command ":' + input + '"');
          return;
        }
        try {
          exCommands[commandName](cm, params);
          // Possibly asynchronous commands (e.g. substitute, which might have a
          // user confirmation), are responsible for calling the callback when
          // done. All others have it taken care of for them here.
          if ((!command || !command.possiblyAsync) && params.callback) {
            params.callback();
          }
        } catch(e) {
          showConfirm(cm, e);
          throw e;
        }
      },
      parseInput_: function(cm, inputStream, result) {
        inputStream.eatWhile(':');
        // Parse range.
        if (inputStream.eat('%')) {
          result.line = cm.firstLine();
          result.lineEnd = cm.lastLine();
        } else {
          result.line = this.parseLineSpec_(cm, inputStream);
          if (result.line !== undefined && inputStream.eat(',')) {
            result.lineEnd = this.parseLineSpec_(cm, inputStream);
          }
        }

        // Parse command name.
        var commandMatch = inputStream.match(/^(\w+)/);
        if (commandMatch) {
          result.commandName = commandMatch[1];
        } else {
          result.commandName = inputStream.match(/.*/)[0];
        }

        return result;
      },
      parseLineSpec_: function(cm, inputStream) {
        var numberMatch = inputStream.match(/^(\d+)/);
        if (numberMatch) {
          return parseInt(numberMatch[1], 10) - 1;
        }
        switch (inputStream.next()) {
          case '.':
            return cm.getCursor().line;
          case '$':
            return cm.lastLine();
          case '\'':
            var markName = inputStream.next();
            var markPos = getMarkPos(cm, cm.state.vim, markName);
            if (!markPos) throw new Error('Mark not set');
            return markPos.line;
          default:
            inputStream.backUp(1);
            return undefined;
        }
      },
      parseCommandArgs_: function(inputStream, params, command) {
        if (inputStream.eol()) {
          return;
        }
        params.argString = inputStream.match(/.*/)[0];
        // Parse command-line arguments
        var delim = command.argDelimiter || /\s+/;
        var args = trim(params.argString).split(delim);
        if (args.length && args[0]) {
          params.args = args;
        }
      },
      matchCommand_: function(commandName) {
        // Return the command in the command map that matches the shortest
        // prefix of the passed in command name. The match is guaranteed to be
        // unambiguous if the defaultExCommandMap's shortNames are set up
        // correctly. (see @code{defaultExCommandMap}).
        for (var i = commandName.length; i > 0; i--) {
          var prefix = commandName.substring(0, i);
          if (this.commandMap_[prefix]) {
            var command = this.commandMap_[prefix];
            if (command.name.indexOf(commandName) === 0) {
              return command;
            }
          }
        }
        return null;
      },
      buildCommandMap_: function() {
        this.commandMap_ = {};
        for (var i = 0; i < defaultExCommandMap.length; i++) {
          var command = defaultExCommandMap[i];
          var key = command.shortName || command.name;
          this.commandMap_[key] = command;
        }
      },
      map: function(lhs, rhs, ctx) {
        if (lhs != ':' && lhs.charAt(0) == ':') {
          if (ctx) { throw Error('Mode not supported for ex mappings'); }
          var commandName = lhs.substring(1);
          if (rhs != ':' && rhs.charAt(0) == ':') {
            // Ex to Ex mapping
            this.commandMap_[commandName] = {
              name: commandName,
              type: 'exToEx',
              toInput: rhs.substring(1),
              user: true
            };
          } else {
            // Ex to key mapping
            this.commandMap_[commandName] = {
              name: commandName,
              type: 'exToKey',
              toKeys: rhs,
              user: true
            };
          }
        } else {
          if (rhs != ':' && rhs.charAt(0) == ':') {
            // Key to Ex mapping.
            var mapping = {
              keys: lhs,
              type: 'keyToEx',
              exArgs: { input: rhs.substring(1) }
            };
            if (ctx) { mapping.context = ctx; }
            defaultKeymap.unshift(mapping);
          } else {
            // Key to key mapping
            var mapping = {
              keys: lhs,
              type: 'keyToKey',
              toKeys: rhs
            };
            if (ctx) { mapping.context = ctx; }
            defaultKeymap.unshift(mapping);
          }
        }
      },
      unmap: function(lhs, ctx) {
        if (lhs != ':' && lhs.charAt(0) == ':') {
          // Ex to Ex or Ex to key mapping
          if (ctx) { throw Error('Mode not supported for ex mappings'); }
          var commandName = lhs.substring(1);
          if (this.commandMap_[commandName] && this.commandMap_[commandName].user) {
            delete this.commandMap_[commandName];
            return;
          }
        } else {
          // Key to Ex or key to key mapping
          var keys = lhs;
          for (var i = 0; i < defaultKeymap.length; i++) {
            if (keys == defaultKeymap[i].keys
                && defaultKeymap[i].context === ctx) {
              defaultKeymap.splice(i, 1);
              return;
            }
          }
        }
        throw Error('No such mapping.');
      }
    };

    var exCommands = {
      colorscheme: function(cm, params) {
        if (!params.args || params.args.length < 1) {
          showConfirm(cm, cm.getOption('theme'));
          return;
        }
        cm.setOption('theme', params.args[0]);
      },
      map: function(cm, params, ctx) {
        var mapArgs = params.args;
        if (!mapArgs || mapArgs.length < 2) {
          if (cm) {
            showConfirm(cm, 'Invalid mapping: ' + params.input);
          }
          return;
        }
        exCommandDispatcher.map(mapArgs[0], mapArgs[1], ctx);
      },
      imap: function(cm, params) { this.map(cm, params, 'insert'); },
      nmap: function(cm, params) { this.map(cm, params, 'normal'); },
      vmap: function(cm, params) { this.map(cm, params, 'visual'); },
      unmap: function(cm, params, ctx) {
        var mapArgs = params.args;
        if (!mapArgs || mapArgs.length < 1) {
          if (cm) {
            showConfirm(cm, 'No such mapping: ' + params.input);
          }
          return;
        }
        exCommandDispatcher.unmap(mapArgs[0], ctx);
      },
      move: function(cm, params) {
        commandDispatcher.processCommand(cm, cm.state.vim, {
            type: 'motion',
            motion: 'moveToLineOrEdgeOfDocument',
            motionArgs: { forward: false, explicitRepeat: true,
              linewise: true },
            repeatOverride: params.line+1});
      },
      set: function(cm, params) {
        var setArgs = params.args;
        // Options passed through to the setOption/getOption calls. May be passed in by the
        // local/global versions of the set command
        var setCfg = params.setCfg || {};
        if (!setArgs || setArgs.length < 1) {
          if (cm) {
            showConfirm(cm, 'Invalid mapping: ' + params.input);
          }
          return;
        }
        var expr = setArgs[0].split('=');
        var optionName = expr[0];
        var value = expr[1];
        var forceGet = false;

        if (optionName.charAt(optionName.length - 1) == '?') {
          // If post-fixed with ?, then the set is actually a get.
          if (value) { throw Error('Trailing characters: ' + params.argString); }
          optionName = optionName.substring(0, optionName.length - 1);
          forceGet = true;
        }
        if (value === undefined && optionName.substring(0, 2) == 'no') {
          // To set boolean options to false, the option name is prefixed with
          // 'no'.
          optionName = optionName.substring(2);
          value = false;
        }

        var optionIsBoolean = options[optionName] && options[optionName].type == 'boolean';
        if (optionIsBoolean && value == undefined) {
          // Calling set with a boolean option sets it to true.
          value = true;
        }
        // If no value is provided, then we assume this is a get.
        if (!optionIsBoolean && value === undefined || forceGet) {
          var oldValue = getOption(optionName, cm, setCfg);
          if (oldValue === true || oldValue === false) {
            showConfirm(cm, ' ' + (oldValue ? '' : 'no') + optionName);
          } else {
            showConfirm(cm, '  ' + optionName + '=' + oldValue);
          }
        } else {
          setOption(optionName, value, cm, setCfg);
        }
      },
      setlocal: function (cm, params) {
        // setCfg is passed through to setOption
        params.setCfg = {scope: 'local'};
        this.set(cm, params);
      },
      setglobal: function (cm, params) {
        // setCfg is passed through to setOption
        params.setCfg = {scope: 'global'};
        this.set(cm, params);
      },
      registers: function(cm, params) {
        var regArgs = params.args;
        var registers = vimGlobalState.registerController.registers;
        var regInfo = '----------Registers----------<br><br>';
        if (!regArgs) {
          for (var registerName in registers) {
            var text = registers[registerName].toString();
            if (text.length) {
              regInfo += '"' + registerName + '    ' + text + '<br>';
            }
          }
        } else {
          var registerName;
          regArgs = regArgs.join('');
          for (var i = 0; i < regArgs.length; i++) {
            registerName = regArgs.charAt(i);
            if (!vimGlobalState.registerController.isValidRegister(registerName)) {
              continue;
            }
            var register = registers[registerName] || new Register();
            regInfo += '"' + registerName + '    ' + register.toString() + '<br>';
          }
        }
        showConfirm(cm, regInfo);
      },
      sort: function(cm, params) {
        var reverse, ignoreCase, unique, number, pattern;
        function parseArgs() {
          if (params.argString) {
            var args = new CodeMirror.StringStream(params.argString);
            if (args.eat('!')) { reverse = true; }
            if (args.eol()) { return; }
            if (!args.eatSpace()) { return 'Invalid arguments'; }
            var opts = args.match(/([dinuox]+)?\s*(\/.+\/)?\s*/);
            if (!opts && !args.eol()) { return 'Invalid arguments'; }
            if (opts[1]) {
              ignoreCase = opts[1].indexOf('i') != -1;
              unique = opts[1].indexOf('u') != -1;
              var decimal = opts[1].indexOf('d') != -1 || opts[1].indexOf('n') != -1 && 1;
              var hex = opts[1].indexOf('x') != -1 && 1;
              var octal = opts[1].indexOf('o') != -1 && 1;
              if (decimal + hex + octal > 1) { return 'Invalid arguments'; }
              number = decimal && 'decimal' || hex && 'hex' || octal && 'octal';
            }
            if (opts[2]) {
              pattern = new RegExp(opts[2].substr(1, opts[2].length - 2), ignoreCase ? 'i' : '');
            }
          }
        }
        var err = parseArgs();
        if (err) {
          showConfirm(cm, err + ': ' + params.argString);
          return;
        }
        var lineStart = params.line || cm.firstLine();
        var lineEnd = params.lineEnd || params.line || cm.lastLine();
        if (lineStart == lineEnd) { return; }
        var curStart = Pos(lineStart, 0);
        var curEnd = Pos(lineEnd, lineLength(cm, lineEnd));
        var text = cm.getRange(curStart, curEnd).split('\n');
        var numberRegex = pattern ? pattern :
           (number == 'decimal') ? /(-?)([\d]+)/ :
           (number == 'hex') ? /(-?)(?:0x)?([0-9a-f]+)/i :
           (number == 'octal') ? /([0-7]+)/ : null;
        var radix = (number == 'decimal') ? 10 : (number == 'hex') ? 16 : (number == 'octal') ? 8 : null;
        var numPart = [], textPart = [];
        if (number || pattern) {
          for (var i = 0; i < text.length; i++) {
            var matchPart = pattern ? text[i].match(pattern) : null;
            if (matchPart && matchPart[0] != '') {
              numPart.push(matchPart);
            } else if (!pattern && numberRegex.exec(text[i])) {
              numPart.push(text[i]);
            } else {
              textPart.push(text[i]);
            }
          }
        } else {
          textPart = text;
        }
        function compareFn(a, b) {
          if (reverse) { var tmp; tmp = a; a = b; b = tmp; }
          if (ignoreCase) { a = a.toLowerCase(); b = b.toLowerCase(); }
          var anum = number && numberRegex.exec(a);
          var bnum = number && numberRegex.exec(b);
          if (!anum) { return a < b ? -1 : 1; }
          anum = parseInt((anum[1] + anum[2]).toLowerCase(), radix);
          bnum = parseInt((bnum[1] + bnum[2]).toLowerCase(), radix);
          return anum - bnum;
        }
        function comparePatternFn(a, b) {
          if (reverse) { var tmp; tmp = a; a = b; b = tmp; }
          if (ignoreCase) { a[0] = a[0].toLowerCase(); b[0] = b[0].toLowerCase(); }
          return (a[0] < b[0]) ? -1 : 1;
        }
        numPart.sort(pattern ? comparePatternFn : compareFn);
        if (pattern) {
          for (var i = 0; i < numPart.length; i++) {
            numPart[i] = numPart[i].input;
          }
        } else if (!number) { textPart.sort(compareFn); }
        text = (!reverse) ? textPart.concat(numPart) : numPart.concat(textPart);
        if (unique) { // Remove duplicate lines
          var textOld = text;
          var lastLine;
          text = [];
          for (var i = 0; i < textOld.length; i++) {
            if (textOld[i] != lastLine) {
              text.push(textOld[i]);
            }
            lastLine = textOld[i];
          }
        }
        cm.replaceRange(text.join('\n'), curStart, curEnd);
      },
      global: function(cm, params) {
        // a global command is of the form
        // :[range]g/pattern/[cmd]
        // argString holds the string /pattern/[cmd]
        var argString = params.argString;
        if (!argString) {
          showConfirm(cm, 'Regular Expression missing from global');
          return;
        }
        // range is specified here
        var lineStart = (params.line !== undefined) ? params.line : cm.firstLine();
        var lineEnd = params.lineEnd || params.line || cm.lastLine();
        // get the tokens from argString
        var tokens = splitBySlash(argString);
        var regexPart = argString, cmd;
        if (tokens.length) {
          regexPart = tokens[0];
          cmd = tokens.slice(1, tokens.length).join('/');
        }
        if (regexPart) {
          // If regex part is empty, then use the previous query. Otherwise
          // use the regex part as the new query.
          try {
           updateSearchQuery(cm, regexPart, true /** ignoreCase */,
             true /** smartCase */);
          } catch (e) {
           showConfirm(cm, 'Invalid regex: ' + regexPart);
           return;
          }
        }
        // now that we have the regexPart, search for regex matches in the
        // specified range of lines
        var query = getSearchState(cm).getQuery();
        var matchedLines = [], content = '';
        for (var i = lineStart; i <= lineEnd; i++) {
          var matched = query.test(cm.getLine(i));
          if (matched) {
            matchedLines.push(i+1);
            content+= cm.getLine(i) + '<br>';
          }
        }
        // if there is no [cmd], just display the list of matched lines
        if (!cmd) {
          showConfirm(cm, content);
          return;
        }
        var index = 0;
        var nextCommand = function() {
          if (index < matchedLines.length) {
            var command = matchedLines[index] + cmd;
            exCommandDispatcher.processCommand(cm, command, {
              callback: nextCommand
            });
          }
          index++;
        };
        nextCommand();
      },
      substitute: function(cm, params) {
        if (!cm.getSearchCursor) {
          throw new Error('Search feature not available. Requires searchcursor.js or ' +
              'any other getSearchCursor implementation.');
        }
        var argString = params.argString;
        var tokens = argString ? splitBySlash(argString) : [];
        var regexPart, replacePart = '', trailing, flagsPart, count;
        var confirm = false; // Whether to confirm each replace.
        var global = false; // True to replace all instances on a line, false to replace only 1.
        if (tokens.length) {
          regexPart = tokens[0];
          replacePart = tokens[1];
          if (replacePart !== undefined) {
            if (getOption('pcre')) {
              replacePart = unescapeRegexReplace(replacePart);
            } else {
              replacePart = translateRegexReplace(replacePart);
            }
            vimGlobalState.lastSubstituteReplacePart = replacePart;
          }
          trailing = tokens[2] ? tokens[2].split(' ') : [];
        } else {
          // either the argString is empty or its of the form ' hello/world'
          // actually splitBySlash returns a list of tokens
          // only if the string starts with a '/'
          if (argString && argString.length) {
            showConfirm(cm, 'Substitutions should be of the form ' +
                ':s/pattern/replace/');
            return;
          }
        }
        // After the 3rd slash, we can have flags followed by a space followed
        // by count.
        if (trailing) {
          flagsPart = trailing[0];
          count = parseInt(trailing[1]);
          if (flagsPart) {
            if (flagsPart.indexOf('c') != -1) {
              confirm = true;
              flagsPart.replace('c', '');
            }
            if (flagsPart.indexOf('g') != -1) {
              global = true;
              flagsPart.replace('g', '');
            }
            regexPart = regexPart + '/' + flagsPart;
          }
        }
        if (regexPart) {
          // If regex part is empty, then use the previous query. Otherwise use
          // the regex part as the new query.
          try {
            updateSearchQuery(cm, regexPart, true /** ignoreCase */,
              true /** smartCase */);
          } catch (e) {
            showConfirm(cm, 'Invalid regex: ' + regexPart);
            return;
          }
        }
        replacePart = replacePart || vimGlobalState.lastSubstituteReplacePart;
        if (replacePart === undefined) {
          showConfirm(cm, 'No previous substitute regular expression');
          return;
        }
        var state = getSearchState(cm);
        var query = state.getQuery();
        var lineStart = (params.line !== undefined) ? params.line : cm.getCursor().line;
        var lineEnd = params.lineEnd || lineStart;
        if (lineStart == cm.firstLine() && lineEnd == cm.lastLine()) {
          lineEnd = Infinity;
        }
        if (count) {
          lineStart = lineEnd;
          lineEnd = lineStart + count - 1;
        }
        var startPos = clipCursorToContent(cm, Pos(lineStart, 0));
        var cursor = cm.getSearchCursor(query, startPos);
        doReplace(cm, confirm, global, lineStart, lineEnd, cursor, query, replacePart, params.callback);
      },
      redo: CodeMirror.commands.redo,
      undo: CodeMirror.commands.undo,
      write: function(cm) {
        if (CodeMirror.commands.save) {
          // If a save command is defined, call it.
          CodeMirror.commands.save(cm);
        } else if (cm.save) {
          // Saves to text area if no save command is defined and cm.save() is available.
          cm.save();
        }
      },
      nohlsearch: function(cm) {
        clearSearchHighlight(cm);
      },
      yank: function (cm) {
        var cur = copyCursor(cm.getCursor());
        var line = cur.line;
        var lineText = cm.getLine(line);
        vimGlobalState.registerController.pushText(
          '0', 'yank', lineText, true, true);
      },
      delmarks: function(cm, params) {
        if (!params.argString || !trim(params.argString)) {
          showConfirm(cm, 'Argument required');
          return;
        }

        var state = cm.state.vim;
        var stream = new CodeMirror.StringStream(trim(params.argString));
        while (!stream.eol()) {
          stream.eatSpace();

          // Record the streams position at the beginning of the loop for use
          // in error messages.
          var count = stream.pos;

          if (!stream.match(/[a-zA-Z]/, false)) {
            showConfirm(cm, 'Invalid argument: ' + params.argString.substring(count));
            return;
          }

          var sym = stream.next();
          // Check if this symbol is part of a range
          if (stream.match('-', true)) {
            // This symbol is part of a range.

            // The range must terminate at an alphabetic character.
            if (!stream.match(/[a-zA-Z]/, false)) {
              showConfirm(cm, 'Invalid argument: ' + params.argString.substring(count));
              return;
            }

            var startMark = sym;
            var finishMark = stream.next();
            // The range must terminate at an alphabetic character which
            // shares the same case as the start of the range.
            if (isLowerCase(startMark) && isLowerCase(finishMark) ||
                isUpperCase(startMark) && isUpperCase(finishMark)) {
              var start = startMark.charCodeAt(0);
              var finish = finishMark.charCodeAt(0);
              if (start >= finish) {
                showConfirm(cm, 'Invalid argument: ' + params.argString.substring(count));
                return;
              }

              // Because marks are always ASCII values, and we have
              // determined that they are the same case, we can use
              // their char codes to iterate through the defined range.
              for (var j = 0; j <= finish - start; j++) {
                var mark = String.fromCharCode(start + j);
                delete state.marks[mark];
              }
            } else {
              showConfirm(cm, 'Invalid argument: ' + startMark + '-');
              return;
            }
          } else {
            // This symbol is a valid mark, and is not part of a range.
            delete state.marks[sym];
          }
        }
      }
    };

    var exCommandDispatcher = new ExCommandDispatcher();

    /**
    * @param {CodeMirror} cm CodeMirror instance we are in.
    * @param {boolean} confirm Whether to confirm each replace.
    * @param {Cursor} lineStart Line to start replacing from.
    * @param {Cursor} lineEnd Line to stop replacing at.
    * @param {RegExp} query Query for performing matches with.
    * @param {string} replaceWith Text to replace matches with. May contain $1,
    *     $2, etc for replacing captured groups using Javascript replace.
    * @param {function()} callback A callback for when the replace is done.
    */
    function doReplace(cm, confirm, global, lineStart, lineEnd, searchCursor, query,
        replaceWith, callback) {
      // Set up all the functions.
      cm.state.vim.exMode = true;
      var done = false;
      var lastPos = searchCursor.from();
      function replaceAll() {
        cm.operation(function() {
          while (!done) {
            replace();
            next();
          }
          stop();
        });
      }
      function replace() {
        var text = cm.getRange(searchCursor.from(), searchCursor.to());
        var newText = text.replace(query, replaceWith);
        searchCursor.replace(newText);
      }
      function next() {
        // The below only loops to skip over multiple occurrences on the same
        // line when 'global' is not true.
        while(searchCursor.findNext() &&
              isInRange(searchCursor.from(), lineStart, lineEnd)) {
          if (!global && lastPos && searchCursor.from().line == lastPos.line) {
            continue;
          }
          cm.scrollIntoView(searchCursor.from(), 30);
          cm.setSelection(searchCursor.from(), searchCursor.to());
          lastPos = searchCursor.from();
          done = false;
          return;
        }
        done = true;
      }
      function stop(close) {
        if (close) { close(); }
        cm.focus();
        if (lastPos) {
          cm.setCursor(lastPos);
          var vim = cm.state.vim;
          vim.exMode = false;
          vim.lastHPos = vim.lastHSPos = lastPos.ch;
        }
        if (callback) { callback(); }
      }
      function onPromptKeyDown(e, _value, close) {
        // Swallow all keys.
        CodeMirror.e_stop(e);
        var keyName = CodeMirror.keyName(e);
        switch (keyName) {
          case 'Y':
            replace(); next(); break;
          case 'N':
            next(); break;
          case 'A':
            // replaceAll contains a call to close of its own. We don't want it
            // to fire too early or multiple times.
            var savedCallback = callback;
            callback = undefined;
            cm.operation(replaceAll);
            callback = savedCallback;
            break;
          case 'L':
            replace();
            // fall through and exit.
          case 'Q':
          case 'Esc':
          case 'Ctrl-C':
          case 'Ctrl-[':
            stop(close);
            break;
        }
        if (done) { stop(close); }
        return true;
      }

      // Actually do replace.
      next();
      if (done) {
        showConfirm(cm, 'No matches for ' + query.source);
        return;
      }
      if (!confirm) {
        replaceAll();
        if (callback) { callback(); };
        return;
      }
      showPrompt(cm, {
        prefix: 'replace with <strong>' + replaceWith + '</strong> (y/n/a/q/l)',
        onKeyDown: onPromptKeyDown
      });
    }

    CodeMirror.keyMap.vim = {
      attach: attachVimMap,
      detach: detachVimMap,
      call: cmKey
    };

    function exitInsertMode(cm) {
      var vim = cm.state.vim;
      var macroModeState = vimGlobalState.macroModeState;
      var insertModeChangeRegister = vimGlobalState.registerController.getRegister('.');
      var isPlaying = macroModeState.isPlaying;
      var lastChange = macroModeState.lastInsertModeChanges;
      // In case of visual block, the insertModeChanges are not saved as a
      // single word, so we convert them to a single word
      // so as to update the ". register as expected in real vim.
      var text = [];
      if (!isPlaying) {
        var selLength = lastChange.inVisualBlock ? vim.lastSelection.visualBlock.height : 1;
        var changes = lastChange.changes;
        var text = [];
        var i = 0;
        // In case of multiple selections in blockwise visual,
        // the inserted text, for example: 'f<Backspace>oo', is stored as
        // 'f', 'f', InsertModeKey 'o', 'o', 'o', 'o'. (if you have a block with 2 lines).
        // We push the contents of the changes array as per the following:
        // 1. In case of InsertModeKey, just increment by 1.
        // 2. In case of a character, jump by selLength (2 in the example).
        while (i < changes.length) {
          // This loop will convert 'ff<bs>oooo' to 'f<bs>oo'.
          text.push(changes[i]);
          if (changes[i] instanceof InsertModeKey) {
             i++;
          } else {
             i+= selLength;
          }
        }
        lastChange.changes = text;
        cm.off('change', onChange);
        CodeMirror.off(cm.getInputField(), 'keydown', onKeyEventTargetKeyDown);
      }
      if (!isPlaying && vim.insertModeRepeat > 1) {
        // Perform insert mode repeat for commands like 3,a and 3,o.
        repeatLastEdit(cm, vim, vim.insertModeRepeat - 1,
            true /** repeatForInsert */);
        vim.lastEditInputState.repeatOverride = vim.insertModeRepeat;
      }
      delete vim.insertModeRepeat;
      vim.insertMode = false;
      cm.setCursor(cm.getCursor().line, cm.getCursor().ch-1);
      cm.setOption('keyMap', 'vim');
      cm.setOption('disableInput', true);
      cm.toggleOverwrite(false); // exit replace mode if we were in it.
      // update the ". register before exiting insert mode
      insertModeChangeRegister.setText(lastChange.changes.join(''));
      CodeMirror.signal(cm, "vim-mode-change", {mode: "normal"});
      if (macroModeState.isRecording) {
        logInsertModeChange(macroModeState);
      }
    }

    function _mapCommand(command) {
      defaultKeymap.unshift(command);
    }

    function mapCommand(keys, type, name, args, extra) {
      var command = {keys: keys, type: type};
      command[type] = name;
      command[type + "Args"] = args;
      for (var key in extra)
        command[key] = extra[key];
      _mapCommand(command);
    }

    // The timeout in milliseconds for the two-character ESC keymap should be
    // adjusted according to your typing speed to prevent false positives.
    defineOption('insertModeEscKeysTimeout', 200, 'number');

    CodeMirror.keyMap['vim-insert'] = {
      // TODO: override navigation keys so that Esc will cancel automatic
      // indentation from o, O, i_<CR>
      fallthrough: ['default'],
      attach: attachVimMap,
      detach: detachVimMap,
      call: cmKey
    };

    CodeMirror.keyMap['vim-replace'] = {
      'Backspace': 'goCharLeft',
      fallthrough: ['vim-insert'],
      attach: attachVimMap,
      detach: detachVimMap,
      call: cmKey
    };

    function executeMacroRegister(cm, vim, macroModeState, registerName) {
      var register = vimGlobalState.registerController.getRegister(registerName);
      if (registerName == ':') {
        // Read-only register containing last Ex command.
        if (register.keyBuffer[0]) {
          exCommandDispatcher.processCommand(cm, register.keyBuffer[0]);
        }
        macroModeState.isPlaying = false;
        return;
      }
      var keyBuffer = register.keyBuffer;
      var imc = 0;
      macroModeState.isPlaying = true;
      macroModeState.replaySearchQueries = register.searchQueries.slice(0);
      for (var i = 0; i < keyBuffer.length; i++) {
        var text = keyBuffer[i];
        var match, key;
        while (text) {
          // Pull off one command key, which is either a single character
          // or a special sequence wrapped in '<' and '>', e.g. '<Space>'.
          match = (/<\w+-.+?>|<\w+>|./).exec(text);
          key = match[0];
          text = text.substring(match.index + key.length);
          CodeMirror.Vim.handleKey(cm, key, 'macro');
          if (vim.insertMode) {
            var changes = register.insertModeChanges[imc++].changes;
            vimGlobalState.macroModeState.lastInsertModeChanges.changes =
                changes;
            repeatInsertModeChanges(cm, changes, 1);
            exitInsertMode(cm);
          }
        }
      };
      macroModeState.isPlaying = false;
    }

    function logKey(macroModeState, key) {
      if (macroModeState.isPlaying) { return; }
      var registerName = macroModeState.latestRegister;
      var register = vimGlobalState.registerController.getRegister(registerName);
      if (register) {
        register.pushText(key);
      }
    }

    function logInsertModeChange(macroModeState) {
      if (macroModeState.isPlaying) { return; }
      var registerName = macroModeState.latestRegister;
      var register = vimGlobalState.registerController.getRegister(registerName);
      if (register && register.pushInsertModeChanges) {
        register.pushInsertModeChanges(macroModeState.lastInsertModeChanges);
      }
    }

    function logSearchQuery(macroModeState, query) {
      if (macroModeState.isPlaying) { return; }
      var registerName = macroModeState.latestRegister;
      var register = vimGlobalState.registerController.getRegister(registerName);
      if (register && register.pushSearchQuery) {
        register.pushSearchQuery(query);
      }
    }

    /**
     * Listens for changes made in insert mode.
     * Should only be active in insert mode.
     */
    function onChange(_cm, changeObj) {
      var macroModeState = vimGlobalState.macroModeState;
      var lastChange = macroModeState.lastInsertModeChanges;
      if (!macroModeState.isPlaying) {
        while(changeObj) {
          lastChange.expectCursorActivityForChange = true;
          if (changeObj.origin == '+input' || changeObj.origin == 'paste'
              || changeObj.origin === undefined /* only in testing */) {
            var text = changeObj.text.join('\n');
            if (lastChange.maybeReset) {
              lastChange.changes = [];
              lastChange.maybeReset = false;
            }
            lastChange.changes.push(text);
          }
          // Change objects may be chained with next.
          changeObj = changeObj.next;
        }
      }
    }

    /**
    * Listens for any kind of cursor activity on CodeMirror.
    */
    function onCursorActivity(cm) {
      var vim = cm.state.vim;
      if (vim.insertMode) {
        // Tracking cursor activity in insert mode (for macro support).
        var macroModeState = vimGlobalState.macroModeState;
        if (macroModeState.isPlaying) { return; }
        var lastChange = macroModeState.lastInsertModeChanges;
        if (lastChange.expectCursorActivityForChange) {
          lastChange.expectCursorActivityForChange = false;
        } else {
          // Cursor moved outside the context of an edit. Reset the change.
          lastChange.maybeReset = true;
        }
      } else if (!cm.curOp.isVimOp) {
        handleExternalSelection(cm, vim);
      }
      if (vim.visualMode) {
        updateFakeCursor(cm);
      }
    }
    function updateFakeCursor(cm) {
      var vim = cm.state.vim;
      var from = clipCursorToContent(cm, copyCursor(vim.sel.head));
      var to = offsetCursor(from, 0, 1);
      if (vim.fakeCursor) {
        vim.fakeCursor.clear();
      }
      vim.fakeCursor = cm.markText(from, to, {className: 'cm-animate-fat-cursor'});
    }
    function handleExternalSelection(cm, vim) {
      var anchor = cm.getCursor('anchor');
      var head = cm.getCursor('head');
      // Enter or exit visual mode to match mouse selection.
      if (vim.visualMode && !cm.somethingSelected()) {
        exitVisualMode(cm, false);
      } else if (!vim.visualMode && !vim.insertMode && cm.somethingSelected()) {
        vim.visualMode = true;
        vim.visualLine = false;
        CodeMirror.signal(cm, "vim-mode-change", {mode: "visual"});
      }
      if (vim.visualMode) {
        // Bind CodeMirror selection model to vim selection model.
        // Mouse selections are considered visual characterwise.
        var headOffset = !cursorIsBefore(head, anchor) ? -1 : 0;
        var anchorOffset = cursorIsBefore(head, anchor) ? -1 : 0;
        head = offsetCursor(head, 0, headOffset);
        anchor = offsetCursor(anchor, 0, anchorOffset);
        vim.sel = {
          anchor: anchor,
          head: head
        };
        updateMark(cm, vim, '<', cursorMin(head, anchor));
        updateMark(cm, vim, '>', cursorMax(head, anchor));
      } else if (!vim.insertMode) {
        // Reset lastHPos if selection was modified by something outside of vim mode e.g. by mouse.
        vim.lastHPos = cm.getCursor().ch;
      }
    }

    /** Wrapper for special keys pressed in insert mode */
    function InsertModeKey(keyName) {
      this.keyName = keyName;
    }

    /**
    * Handles raw key down events from the text area.
    * - Should only be active in insert mode.
    * - For recording deletes in insert mode.
    */
    function onKeyEventTargetKeyDown(e) {
      var macroModeState = vimGlobalState.macroModeState;
      var lastChange = macroModeState.lastInsertModeChanges;
      var keyName = CodeMirror.keyName(e);
      if (!keyName) { return; }
      function onKeyFound() {
        if (lastChange.maybeReset) {
          lastChange.changes = [];
          lastChange.maybeReset = false;
        }
        lastChange.changes.push(new InsertModeKey(keyName));
        return true;
      }
      if (keyName.indexOf('Delete') != -1 || keyName.indexOf('Backspace') != -1) {
        CodeMirror.lookupKey(keyName, 'vim-insert', onKeyFound);
      }
    }

    /**
     * Repeats the last edit, which includes exactly 1 command and at most 1
     * insert. Operator and motion commands are read from lastEditInputState,
     * while action commands are read from lastEditActionCommand.
     *
     * If repeatForInsert is true, then the function was called by
     * exitInsertMode to repeat the insert mode changes the user just made. The
     * corresponding enterInsertMode call was made with a count.
     */
    function repeatLastEdit(cm, vim, repeat, repeatForInsert) {
      var macroModeState = vimGlobalState.macroModeState;
      macroModeState.isPlaying = true;
      var isAction = !!vim.lastEditActionCommand;
      var cachedInputState = vim.inputState;
      function repeatCommand() {
        if (isAction) {
          commandDispatcher.processAction(cm, vim, vim.lastEditActionCommand);
        } else {
          commandDispatcher.evalInput(cm, vim);
        }
      }
      function repeatInsert(repeat) {
        if (macroModeState.lastInsertModeChanges.changes.length > 0) {
          // For some reason, repeat cw in desktop VIM does not repeat
          // insert mode changes. Will conform to that behavior.
          repeat = !vim.lastEditActionCommand ? 1 : repeat;
          var changeObject = macroModeState.lastInsertModeChanges;
          repeatInsertModeChanges(cm, changeObject.changes, repeat);
        }
      }
      vim.inputState = vim.lastEditInputState;
      if (isAction && vim.lastEditActionCommand.interlaceInsertRepeat) {
        // o and O repeat have to be interlaced with insert repeats so that the
        // insertions appear on separate lines instead of the last line.
        for (var i = 0; i < repeat; i++) {
          repeatCommand();
          repeatInsert(1);
        }
      } else {
        if (!repeatForInsert) {
          // Hack to get the cursor to end up at the right place. If I is
          // repeated in insert mode repeat, cursor will be 1 insert
          // change set left of where it should be.
          repeatCommand();
        }
        repeatInsert(repeat);
      }
      vim.inputState = cachedInputState;
      if (vim.insertMode && !repeatForInsert) {
        // Don't exit insert mode twice. If repeatForInsert is set, then we
        // were called by an exitInsertMode call lower on the stack.
        exitInsertMode(cm);
      }
      macroModeState.isPlaying = false;
    };

    function repeatInsertModeChanges(cm, changes, repeat) {
      function keyHandler(binding) {
        if (typeof binding == 'string') {
          CodeMirror.commands[binding](cm);
        } else {
          binding(cm);
        }
        return true;
      }
      var head = cm.getCursor('head');
      var inVisualBlock = vimGlobalState.macroModeState.lastInsertModeChanges.inVisualBlock;
      if (inVisualBlock) {
        // Set up block selection again for repeating the changes.
        var vim = cm.state.vim;
        var lastSel = vim.lastSelection;
        var offset = getOffset(lastSel.anchor, lastSel.head);
        selectForInsert(cm, head, offset.line + 1);
        repeat = cm.listSelections().length;
        cm.setCursor(head);
      }
      for (var i = 0; i < repeat; i++) {
        if (inVisualBlock) {
          cm.setCursor(offsetCursor(head, i, 0));
        }
        for (var j = 0; j < changes.length; j++) {
          var change = changes[j];
          if (change instanceof InsertModeKey) {
            CodeMirror.lookupKey(change.keyName, 'vim-insert', keyHandler);
          } else {
            var cur = cm.getCursor();
            cm.replaceRange(change, cur, cur);
          }
        }
      }
      if (inVisualBlock) {
        cm.setCursor(offsetCursor(head, 0, 1));
      }
    }

    resetVimGlobalState();
    return vimApi;
  };
  // Initialize Vim and make it available as an API.
  CodeMirror.Vim = Vim();
});
