The Tor Browser: browser/devtools/sourceeditor/codemirror/keymap/vim.js@6474c204b198 (annotated)

browser/devtools/sourceeditor/codemirror/keymap/vim.js@6474c204b198 (annotated)

browser/devtools/sourceeditor/codemirror/keymap/vim.js

Wed, 31 Dec 2014 06:09:35 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:09:35 +0100
changeset 0: 6474c204b198
permissions: -rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

 /**
  * Supported keybindings:
  *
  *   Motion:
  *   h, j, k, l
  *   gj, gk
  *   e, E, w, W, b, B, ge, gE
  *   f<character>, F<character>, t<character>, T<character>
  *   $, ^, 0, -, +, _
  *   gg, G
  *   %
  *   '<character>, `<character>
  *
  *   Operator:
  *   d, y, c
  *   dd, yy, cc
  *   g~, g~g~
  *   >, <, >>, <<
  *
  *   Operator-Motion:
  *   x, X, D, Y, C, ~
  *
  *   Action:
  *   a, i, s, A, I, S, o, O
  *   zz, z., z<CR>, zt, zb, z-
  *   J
  *   u, Ctrl-r
  *   m<character>
  *   r<character>
  *
  *   Modes:
  *   ESC - leave insert mode, visual mode, and clear input state.
  *   Ctrl-[, Ctrl-c - same as ESC.
  *
  * 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 instanstiation
  *  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.
  */
 (function(mod) {
   if (typeof exports == "object" && typeof module == "object") // CommonJS
     mod(require("../lib/codemirror"), require("../addon/search/searchcursor"), require("../addon/dialog/dialog"));
   else if (typeof define == "function" && define.amd) // AMD
     define(["../lib/codemirror", "../addon/search/searchcursor", "../addon/dialog/dialog"], 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'] },
     { keys: ['<C-Space>'], type: 'keyToKey', toKeys: ['W'] },
     { keys: ['<C-BS>'], type: 'keyToKey', toKeys: ['B'] },
     { keys: ['<S-Space>'], type: 'keyToKey', toKeys: ['w'] },
     { keys: ['<S-BS>'], type: 'keyToKey', toKeys: ['b'] },
     { 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: ['s'], type: 'keyToKey', toKeys: ['c', 'l'], context: 'normal' },
     { keys: ['s'], type: 'keyToKey', toKeys: ['x', 'i'], context: 'visual'},
     { keys: ['S'], type: 'keyToKey', toKeys: ['c', 'c'], context: 'normal' },
     { keys: ['S'], type: 'keyToKey', toKeys: ['d', 'c', 'c'], 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' },
     // 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: ['g','j'], type: 'motion',
         motion: 'moveByDisplayLines',
         motionArgs: { forward: true }},
     { keys: ['g','k'], 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: ['g', 'e'], type: 'motion',
         motion: 'moveByWords',
         motionArgs: { forward: false, wordEnd: true, inclusive: true }},
     { keys: ['g', 'E'], 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: ['g', 'g'], 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}},
     { 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 } },
     { 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',
         motionArgs: { }},
     { keys: ['o'], type: 'motion', motion: 'moveToOtherHighlightedEnd', motionArgs: { },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: 'swapcase' },
     { 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 },
         operatorMotionArgs: { visualLine: true }},
     { keys: ['Y'], type: 'operatorMotion', operator: 'yank',
         motion: 'moveToEol', motionArgs: { inclusive: true },
         operatorMotionArgs: { visualLine: true }},
     { keys: ['C'], type: 'operatorMotion',
         operator: 'change',
         motion: 'moveToEol', motionArgs: { inclusive: true },
         operatorMotionArgs: { visualLine: true }},
     { keys: ['~'], type: 'operatorMotion',
         operator: 'swapcase', operatorArgs: { shouldMoveCursor: true },
         motion: 'moveByCharacters', motionArgs: { forward: true }},
     // 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' }},
     { keys: ['A'], type: 'action', action: 'enterInsertMode', isEdit: true,
         actionArgs: { insertAt: 'eol' }},
     { keys: ['i'], type: 'action', action: 'enterInsertMode', isEdit: true,
         actionArgs: { insertAt: 'inplace' }},
     { keys: ['I'], type: 'action', action: 'enterInsertMode', isEdit: true,
         actionArgs: { insertAt: 'firstNonBlank' }},
     { keys: ['o'], type: 'action', action: 'newLineAndEnterInsertMode',
         isEdit: true, interlaceInsertRepeat: true,
         actionArgs: { after: true }},
     { keys: ['O'], type: 'action', action: 'newLineAndEnterInsertMode',
         isEdit: true, interlaceInsertRepeat: true,
         actionArgs: { after: false }},
     { keys: ['v'], type: 'action', action: 'toggleVisualMode' },
     { keys: ['V'], type: 'action', action: 'toggleVisualMode',
         actionArgs: { linewise: true }},
     { keys: ['g', 'v'], 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' },
     { keys: ['<C-r>'], type: 'action', action: 'redo' },
     { keys: ['m', 'character'], type: 'action', action: 'setMark' },
     { keys: ['"', 'character'], type: 'action', action: 'setRegister' },
     { keys: ['z', 'z'], type: 'action', action: 'scrollToCursor',
         actionArgs: { position: 'center' }},
     { keys: ['z', '.'], type: 'action', action: 'scrollToCursor',
         actionArgs: { position: 'center' },
         motion: 'moveToFirstNonWhiteSpaceCharacter' },
     { keys: ['z', 't'], 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: ['z', 'b'], 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}},
     // 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', toJumplist: true }},
     { keys: ['#'], type: 'search',
         searchArgs: { forward: false, querySrc: 'wordUnderCursor', toJumplist: true }},
     // Ex command
     { keys: [':'], type: 'ex' }
   ];
   var Pos = CodeMirror.Pos;
   var Vim = function() {
     CodeMirror.defineOption('vimMode', false, function(cm, val) {
       if (val) {
         cm.setOption('keyMap', 'vim');
         cm.setOption('disableInput', true);
         CodeMirror.signal(cm, "vim-mode-change", {mode: "normal"});
         cm.on('beforeSelectionChange', beforeSelectionChange);
         maybeInitVimState(cm);
         CodeMirror.on(cm.getInputField(), 'paste', getOnPasteFn(cm));
       } else if (cm.state.vim) {
         cm.setOption('keyMap', 'default');
         cm.setOption('disableInput', false);
         cm.off('beforeSelectionChange', beforeSelectionChange);
         CodeMirror.off(cm.getInputField(), 'paste', getOnPasteFn(cm));
         cm.state.vim = null;
       }
     });
     function beforeSelectionChange(cm, obj) {
       var vim = cm.state.vim;
       if (vim.insertMode || vim.exMode) return;
       var head = obj.ranges[0].head;
       var anchor = obj.ranges[0].anchor;
       if (head.ch && head.ch == cm.doc.getLine(head.line).length) {
         var pos = Pos(head.line, head.ch - 1);
         obj.update([{anchor: cursorEqual(head, anchor) ? pos : anchor,
                      head: pos}]);
       }
     }
     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 wordRegexp = [(/\w/), (/[^\w\s]/)], bigWordRegexp = [(/\S/)];
     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 specialSymbols = '~`!@#$%^&*()_-+=[{}]\\|/?.,<>:;"\''.split('');
     var specialKeys = ['Left', 'Right', 'Up', 'Down', 'Space', 'Backspace',
         'Esc', 'Home', 'End', 'PageUp', 'PageDown', 'Enter'];
     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) {
       if (defaultValue === undefined) { throw Error('defaultValue is required'); }
       if (!type) { type = 'string'; }
       options[name] = {
         type: type,
         defaultValue: defaultValue
       };
       setOption(name, defaultValue);
     }
     function setOption(name, value) {
       var option = options[name];
       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;
         }
       }
       option.value = option.type == 'boolean' ? !!value : value;
     }
     function getOption(name) {
       var option = options[name];
       if (!option) {
         throw Error('Unknown option: ' + name);
       }
       return option.value;
     }
     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.onRecordingDone = undefined;
       this.lastInsertModeChanges = createInsertModeChanges();
     }
     MacroModeState.prototype = {
       exitMacroRecordMode: function() {
         var macroModeState = vimGlobalState.macroModeState;
         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;
           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: {},
           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,
           lastSelection: null
         };
       }
       return cm.state.vim;
     }
     var vimGlobalState;
     function resetVimGlobalState() {
       vimGlobalState = {
         // The current search query.
         searchQuery: null,
         // Whether we are searching backwards.
         searchIsReversed: false,
         jumpList: createCircularJumpList(),
         macroModeState: new MacroModeState,
         // Recording latest f, t, F or T motion command.
         lastChararacterSearch: {increment:0, forward:true, selectedCharacter:''},
         registerController: new RegisterController({})
       };
       for (var optionName in options) {
         var option = options[optionName];
         option.value = option.defaultValue;
       }
     }
     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,
       InsertModeKey: InsertModeKey,
       map: function(lhs, rhs, ctx) {
         // Add user defined key bindings.
         exCommandDispatcher.map(lhs, rhs, ctx);
       },
       setOption: setOption,
       getOption: getOption,
       defineOption: defineOption,
       defineEx: function(name, prefix, func){
         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'};
       },
       // This is the outermost function called by CodeMirror, after keys have
       // been mapped to their Vim equivalents.
       handleKey: function(cm, key) {
         var command;
         var vim = maybeInitVimState(cm);
         var macroModeState = vimGlobalState.macroModeState;
         if (macroModeState.isRecording) {
           if (key == 'q') {
             macroModeState.exitMacroRecordMode();
             vim.inputState = new InputState();
             return;
           }
         }
         if (key == '<Esc>') {
           // Clear input state and get back to normal mode.
           vim.inputState = new InputState();
           if (vim.visualMode) {
             exitVisualMode(cm);
           }
           return;
         }
         // Enter visual mode when the mouse selects text.
         if (!vim.visualMode &&
             !cursorEqual(cm.getCursor('head'), cm.getCursor('anchor'))) {
           vim.visualMode = true;
           vim.visualLine = false;
           CodeMirror.signal(cm, "vim-mode-change", {mode: "visual"});
           cm.on('mousedown', exitVisualMode);
         }
         if (key != '0' || (key == '0' && vim.inputState.getRepeat() === 0)) {
           // Have to special case 0 since it's both a motion and a number.
           command = commandDispatcher.matchCommand(key, defaultKeymap, vim);
         }
         if (!command) {
           if (isNumber(key)) {
             // Increment count unless count is 0 and key is 0.
             vim.inputState.pushRepeatDigit(key);
           }
           if (macroModeState.isRecording) {
             logKey(macroModeState, key);
           }
           return;
         }
         if (command.type == 'keyToKey') {
           // TODO: prevent infinite recursion.
           for (var i = 0; i < command.toKeys.length; i++) {
             this.handleKey(cm, command.toKeys[i]);
           }
         } else {
           if (macroModeState.isRecording) {
             logKey(macroModeState, key);
           }
           commandDispatcher.processCommand(cm, vim, command);
         }
       },
       handleEx: function(cm, input) {
         exCommandDispatcher.processCommand(cm, input);
       }
     };
     // 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;
     };
     /*
      * 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) {
       this.clear();
       this.keyBuffer = [text || ''];
       this.insertModeChanges = [];
       this.linewise = !!linewise;
     }
     Register.prototype = {
       setText: function(text, linewise) {
         this.keyBuffer = [text || ''];
         this.linewise = !!linewise;
       },
       pushText: function(text, linewise) {
         // if this register has ever been set to linewise, use linewise.
         if (linewise || this.linewise) {
           this.keyBuffer.push('\n');
           this.linewise = true;
         }
         this.keyBuffer.push(text);
       },
       pushInsertModeChanges: function(changes) {
         this.insertModeChanges.push(createInsertModeChanges(changes));
       },
       clear: function() {
         this.keyBuffer = [];
         this.insertModeChanges = [];
         this.linewise = false;
       },
       toString: function() {
         return this.keyBuffer.join('');
       }
     };
     /*
      * 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();
     }
     RegisterController.prototype = {
       pushText: function(registerName, operator, text, linewise) {
         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);
               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);
           return;
         }
         // If we've gotten to this point, we've actually specified a register
         var append = isUpperCase(registerName);
         if (append) {
           register.append(text, linewise);
           // The unnamed register always has the same value as the last used
           // register.
           this.unnamedRegister.append(text, linewise);
         } else {
           register.setText(text, linewise);
           this.unnamedRegister.setText(text, 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));
         }
       }
     };
     var commandDispatcher = {
       matchCommand: function(key, keyMap, vim) {
         var inputState = vim.inputState;
         var keys = inputState.keyBuffer.concat(key);
         var matchedCommands = [];
         var selectedCharacter;
         for (var i = 0; i < keyMap.length; i++) {
           var command = keyMap[i];
           if (matchKeysPartial(keys, command.keys)) {
             if (inputState.operator && command.type == 'action') {
               // Ignore matched action commands after an operator. Operators
               // only operate on motions. This check is really for text
               // objects since aW, a[ etcs conflicts with a.
               continue;
             }
             // Match commands that take <character> as an argument.
             if (command.keys[keys.length - 1] == 'character') {
               selectedCharacter = keys[keys.length - 1];
               if (selectedCharacter.length>1){
                 switch(selectedCharacter){
                   case '<CR>':
                     selectedCharacter='\n';
                     break;
                   case '<Space>':
                     selectedCharacter=' ';
                     break;
                   default:
                     continue;
                 }
               }
             }
             // Add the command to the list of matched commands. Choose the best
             // command later.
             matchedCommands.push(command);
           }
         }
         // Returns the command if it is a full match, or null if not.
         function getFullyMatchedCommandOrNull(command) {
           if (keys.length < command.keys.length) {
             // Matches part of a multi-key command. Buffer and wait for next
             // stroke.
             inputState.keyBuffer.push(key);
             return null;
           } else {
             if (command.keys[keys.length - 1] == 'character') {
               inputState.selectedCharacter = selectedCharacter;
             }
             // Clear the buffer since a full match was found.
             inputState.keyBuffer = [];
             return command;
           }
         }
         if (!matchedCommands.length) {
           // Clear the buffer since there were no matches.
           inputState.keyBuffer = [];
           return null;
         } else if (matchedCommands.length == 1) {
           return getFullyMatchedCommandOrNull(matchedCommands[0]);
         } else {
           // Find the best match in the list of matchedCommands.
           var context = vim.visualMode ? 'visual' : 'normal';
           var bestMatch; // Default to first in the list.
           for (var i = 0; i < matchedCommands.length; i++) {
             var current = matchedCommands[i];
             if (current.context == context) {
               bestMatch = current;
               break;
             } else if (!bestMatch && !current.context) {
               // Only set an imperfect match to best match if no best match is
               // set and the imperfect match is not restricted to another
               // context.
               bestMatch = current;
             }
           }
           return getFullyMatchedCommandOrNull(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.
             vim.inputState = new InputState();
           }
         }
         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;
         vim.inputState = new InputState();
         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;
         getSearchState(cm).setReversed(!forward);
         var promptPrefix = (forward) ? '/' : '?';
         var originalQuery = getSearchState(cm).getQuery();
         var originalScrollPos = cm.getScrollInfo();
         function handleQuery(query, ignoreCase, smartCase) {
           try {
             updateSearchQuery(cm, query, ignoreCase, smartCase);
           } catch (e) {
             showConfirm(cm, 'Invalid regex: ' + query);
             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 */);
         }
         function onPromptKeyUp(_e, query) {
           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-[') {
             updateSearchQuery(cm, originalQuery);
             clearSearchHighlight(cm);
             cm.scrollTo(originalScrollPos.left, originalScrollPos.top);
             CodeMirror.e_stop(e);
             close();
             cm.focus();
           }
         }
         switch (command.searchArgs.querySrc) {
           case 'prompt':
             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) {
               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.
           exCommandDispatcher.processCommand(cm, input);
         }
         function onPromptKeyDown(e, _input, close) {
           var keyName = CodeMirror.keyName(e);
           if (keyName == 'Esc' || keyName == 'Ctrl-C' || keyName == 'Ctrl-[') {
             CodeMirror.e_stop(e);
             close();
             cm.focus();
           }
         }
         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 comand 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 selectionEnd = copyCursor(cm.getCursor('head'));
         var selectionStart = copyCursor(cm.getCursor('anchor'));
         // The difference between cur and selection cursors are that cur is
         // being operated on and ignores that there is a selection.
         var curStart = copyCursor(selectionEnd);
         var curOriginal = copyCursor(curStart);
         var curEnd;
         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;
         vim.inputState = new InputState();
         if (motion) {
           var motionResult = motions[motion](cm, 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, curOriginal, motionResult);
             }
           }
           if (motionResult instanceof Array) {
             curStart = motionResult[0];
             curEnd = motionResult[1];
           } else {
             curEnd = motionResult;
           }
           // TODO: Handle null returns from motion commands better.
           if (!curEnd) {
             curEnd = Pos(curStart.line, curStart.ch);
           }
           if (vim.visualMode) {
             // Check if the selection crossed over itself. Will need to shift
             // the start point if that happened.
             if (cursorIsBefore(selectionStart, selectionEnd) &&
                 (cursorEqual(selectionStart, curEnd) ||
                     cursorIsBefore(curEnd, selectionStart))) {
               // The end of the selection has moved from after the start to
               // before the start. We will shift the start right by 1.
               selectionStart.ch += 1;
             } else if (cursorIsBefore(selectionEnd, selectionStart) &&
                 (cursorEqual(selectionStart, curEnd) ||
                     cursorIsBefore(selectionStart, curEnd))) {
               // The opposite happened. We will shift the start left by 1.
               selectionStart.ch -= 1;
             }
             selectionEnd = curEnd;
             selectionStart = (motionResult instanceof Array) ? curStart : selectionStart;
             if (vim.visualLine) {
               if (cursorIsBefore(selectionStart, selectionEnd)) {
                 selectionStart.ch = 0;
                 var lastLine = cm.lastLine();
                 if (selectionEnd.line > lastLine) {
                   selectionEnd.line = lastLine;
                 }
                 selectionEnd.ch = lineLength(cm, selectionEnd.line);
               } else {
                 selectionEnd.ch = 0;
                 selectionStart.ch = lineLength(cm, selectionStart.line);
               }
             }
             cm.setSelection(selectionStart, selectionEnd);
             updateMark(cm, vim, '<',
                 cursorIsBefore(selectionStart, selectionEnd) ? selectionStart
                     : selectionEnd);
             updateMark(cm, vim, '>',
                 cursorIsBefore(selectionStart, selectionEnd) ? selectionEnd
                     : selectionStart);
           } else if (!operator) {
             curEnd = clipCursorToContent(cm, curEnd);
             cm.setCursor(curEnd.line, curEnd.ch);
           }
         }
         if (operator) {
           var inverted = false;
           vim.lastMotion = null;
           operatorArgs.repeat = repeat; // Indent in visual mode needs this.
           if (vim.visualMode) {
             curStart = selectionStart;
             curEnd = selectionEnd;
             motionArgs.inclusive = true;
           }
           // Swap start and end if motion was backward.
           if (cursorIsBefore(curEnd, curStart)) {
             var tmp = curStart;
             curStart = curEnd;
             curEnd = tmp;
             inverted = true;
           }
           if (motionArgs.inclusive && !(vim.visualMode && inverted)) {
             // Move the selection end one to the right to include the last
             // character.
             curEnd.ch++;
           }
           var linewise = motionArgs.linewise ||
               (vim.visualMode && vim.visualLine);
           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);
           }
           operatorArgs.registerName = registerName;
           // Keep track of linewise as it affects how paste and change behave.
           operatorArgs.linewise = linewise;
           operators[operator](cm, operatorArgs, vim, curStart,
               curEnd, curOriginal);
           if (vim.visualMode) {
             exitVisualMode(cm);
           }
         }
       },
       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, 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, motionArgs) {
         var line = getUserVisibleLines(cm).bottom - motionArgs.repeat +1;
         return Pos(line, findFirstNonWhiteSpaceCharacter(cm.getLine(line)));
       },
       expandToLine: function(cm, motionArgs) {
         // Expands forward to end of line, and then to next line if repeat is
         // >1. Does not handle backward motion!
         var cur = cm.getCursor();
         return Pos(cur.line + motionArgs.repeat - 1, Infinity);
       },
       findNext: function(cm, 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, motionArgs, vim) {
         var mark = vim.marks[motionArgs.selectedCharacter];
         if (mark) {
           return mark.find();
         }
         return null;
       },
       moveToOtherHighlightedEnd: function(cm) {
         var curEnd = copyCursor(cm.getCursor('head'));
         var curStart = copyCursor(cm.getCursor('anchor'));
         if (cursorIsBefore(curStart, curEnd)) {
            curEnd.ch += 1;
         } else if (cursorIsBefore(curEnd, curStart)) {
            curStart.ch -= 1;
         }
         return ([curEnd,curStart]);
       },
       jumpToMark: function(cm, motionArgs, vim) {
         var best = cm.getCursor();
         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) ?
               cusrorIsBetween(cursor, mark, best) :
               cusrorIsBetween(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, motionArgs) {
         var cur = cm.getCursor();
         var repeat = motionArgs.repeat;
         var ch = motionArgs.forward ? cur.ch + repeat : cur.ch - repeat;
         return Pos(cur.line, ch);
       },
       moveByLines: function(cm, motionArgs, vim) {
         var cur = cm.getCursor();
         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 cancels linewise motions that start on an edge and move beyond
         // that edge. It does not cancel motions that do not start on an edge.
         if ((line < first && cur.line == first) ||
             (line > last && cur.line == last)) {
           return;
         }
         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, motionArgs, vim) {
         var cur = cm.getCursor();
         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, 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 = cm.getCursor();
         var repeat = motionArgs.repeat;
         cm.moveV((motionArgs.forward ? repeat : -repeat), 'page');
         var curEnd = cm.getCursor();
         cm.setCursor(curStart);
         return curEnd;
       },
       moveByParagraph: function(cm, motionArgs) {
         var line = cm.getCursor().line;
         var repeat = motionArgs.repeat;
         var inc = motionArgs.forward ? 1 : -1;
         for (var i = 0; i < repeat; i++) {
           if ((!motionArgs.forward && line === cm.firstLine() ) ||
               (motionArgs.forward && line == cm.lastLine())) {
             break;
           }
           line += inc;
           while (line !== cm.firstLine() && line != cm.lastLine() && cm.getLine(line)) {
             line += inc;
           }
         }
         return Pos(line, 0);
       },
       moveByScroll: function(cm, 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(cm.getCursor(), 'local');
         motionArgs.repeat = repeat;
         var curEnd = motions.moveByDisplayLines(cm, 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, motionArgs) {
         return moveToWord(cm, motionArgs.repeat, !!motionArgs.forward,
             !!motionArgs.wordEnd, !!motionArgs.bigWord);
       },
       moveTillCharacter: function(cm, 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, motionArgs) {
         var repeat = motionArgs.repeat;
         recordLastCharacterSearch(0, motionArgs);
         return moveToCharacter(cm, repeat, motionArgs.forward,
             motionArgs.selectedCharacter) || cm.getCursor();
       },
       moveToSymbol: function(cm, motionArgs) {
         var repeat = motionArgs.repeat;
         return findSymbol(cm, repeat, motionArgs.forward,
             motionArgs.selectedCharacter) || cm.getCursor();
       },
       moveToColumn: function(cm, 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(cm.getCursor(),'div').left;
         return moveToColumn(cm, repeat);
       },
       moveToEol: function(cm, motionArgs, vim) {
         var cur = cm.getCursor();
         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) {
         // Go to the start of the line where the text begins, or the end for
         // whitespace-only lines
         var cursor = cm.getCursor();
         return Pos(cursor.line,
                    findFirstNonWhiteSpaceCharacter(cm.getLine(cursor.line)));
       },
       moveToMatchedSymbol: function(cm) {
         var cursor = cm.getCursor();
         var line = cursor.line;
         var ch = cursor.ch;
         var lineText = cm.getLine(line);
         var symbol;
         var startContext = cm.getTokenAt(cursor).type;
         var startCtxLevel = getContextLevel(startContext);
         do {
           symbol = lineText.charAt(ch++);
           if (symbol && isMatchableSymbol(symbol)) {
             var endContext = cm.getTokenAt(Pos(line, ch)).type;
             var endCtxLevel = getContextLevel(endContext);
             if (startCtxLevel >= endCtxLevel) {
               break;
             }
           }
         } while (symbol);
         if (symbol) {
           return findMatchedSymbol(cm, Pos(line, ch-1), symbol);
         } else {
           return cursor;
         }
       },
       moveToStartOfLine: function(cm) {
         var cursor = cm.getCursor();
         return Pos(cursor.line, 0);
       },
       moveToLineOrEdgeOfDocument: function(cm, 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, motionArgs) {
         // 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;
         // 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, mirroredPairs[character], inclusive);
         } else if (selfPaired[character]) {
           tmp = findBeginningAndEnd(cm, 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 {
           // No text object defined for this, don't move.
           return null;
         }
         return [tmp.start, tmp.end];
       },
       repeatLastCharacterSearch: function(cm, motionArgs) {
         var lastSearch = vimGlobalState.lastChararacterSearch;
         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 cm.getCursor();
         }
         curEnd.ch += increment;
         return curEnd;
       }
     };
     var operators = {
       change: function(cm, operatorArgs, _vim, curStart, curEnd) {
         vimGlobalState.registerController.pushText(
             operatorArgs.registerName, 'change', cm.getRange(curStart, curEnd),
             operatorArgs.linewise);
         if (operatorArgs.linewise) {
           // Push the next line back down, if there is a next line.
           var replacement = curEnd.line > cm.lastLine() ? '' : '\n';
           cm.replaceRange(replacement, curStart, curEnd);
           cm.indentLine(curStart.line, 'smart');
           // null ch so setCursor moves to end of line.
           curStart.ch = null;
         } else {
           // Exclude trailing whitespace if the range is not all whitespace.
           var text = cm.getRange(curStart, curEnd);
           if (!isWhiteSpaceString(text)) {
             var match = (/\s+$/).exec(text);
             if (match) {
               curEnd = offsetCursor(curEnd, 0, - match[0].length);
             }
           }
           cm.replaceRange('', curStart, curEnd);
         }
         actions.enterInsertMode(cm, {}, cm.state.vim);
         cm.setCursor(curStart);
       },
       // delete is a javascript keyword.
       'delete': function(cm, operatorArgs, _vim, curStart, curEnd) {
         // If the ending line is past the last line, inclusive, instead of
         // including the trailing \n, include the \n before the starting line
         if (operatorArgs.linewise &&
             curEnd.line > cm.lastLine() && curStart.line > cm.firstLine()) {
           curStart.line--;
           curStart.ch = lineLength(cm, curStart.line);
         }
         vimGlobalState.registerController.pushText(
             operatorArgs.registerName, 'delete', cm.getRange(curStart, curEnd),
             operatorArgs.linewise);
         cm.replaceRange('', curStart, curEnd);
         if (operatorArgs.linewise) {
           cm.setCursor(motions.moveToFirstNonWhiteSpaceCharacter(cm));
         } else {
           cm.setCursor(curStart);
         }
       },
       indent: function(cm, operatorArgs, vim, curStart, curEnd) {
         var startLine = curStart.line;
         var endLine = curEnd.line;
         // In visual mode, n> shifts the selection right n times, instead of
         // shifting n lines right once.
         var repeat = (vim.visualMode) ? operatorArgs.repeat : 1;
         if (operatorArgs.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, operatorArgs.indentRight);
           }
         }
         cm.setCursor(curStart);
         cm.setCursor(motions.moveToFirstNonWhiteSpaceCharacter(cm));
       },
       swapcase: function(cm, operatorArgs, _vim, curStart, curEnd, curOriginal) {
         var toSwap = cm.getRange(curStart, curEnd);
         var swapped = '';
         for (var i = 0; i < toSwap.length; i++) {
           var character = toSwap.charAt(i);
           swapped += isUpperCase(character) ? character.toLowerCase() :
               character.toUpperCase();
         }
         cm.replaceRange(swapped, curStart, curEnd);
         if (!operatorArgs.shouldMoveCursor) {
           cm.setCursor(curOriginal);
         }
       },
       yank: function(cm, operatorArgs, _vim, curStart, curEnd, curOriginal) {
         vimGlobalState.registerController.pushText(
             operatorArgs.registerName, 'yank',
             cm.getRange(curStart, curEnd), operatorArgs.linewise);
         cm.setCursor(curOriginal);
       }
     };
     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*1.4;
             break;
           case 'top': y = y + lineHeight*0.4;
             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);
       },
       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;
         if (insertAt == 'eol') {
           var cursor = cm.getCursor();
           cursor = Pos(cursor.line, lineLength(cm, cursor.line));
           cm.setCursor(cursor);
         } else if (insertAt == 'charAfter') {
           cm.setCursor(offsetCursor(cm.getCursor(), 0, 1));
         } else if (insertAt == 'firstNonBlank') {
           cm.setCursor(motions.moveToFirstNonWhiteSpaceCharacter(cm));
         }
         cm.setOption('keyMap', 'vim-insert');
         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.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);
           cm.on('cursorActivity', onCursorActivity);
           CodeMirror.on(cm.getInputField(), 'keydown', onKeyEventTargetKeyDown);
         }
       },
       toggleVisualMode: function(cm, actionArgs, vim) {
         var repeat = actionArgs.repeat;
         var curStart = cm.getCursor();
         var curEnd;
         // 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) {
           cm.on('mousedown', exitVisualMode);
           vim.visualMode = true;
           vim.visualLine = !!actionArgs.linewise;
           if (vim.visualLine) {
             curStart.ch = 0;
             curEnd = clipCursorToContent(
               cm, Pos(curStart.line + repeat - 1, lineLength(cm, curStart.line)),
               true /** includeLineBreak */);
           } else {
             curEnd = clipCursorToContent(
               cm, Pos(curStart.line, curStart.ch + repeat),
               true /** includeLineBreak */);
           }
           // Make the initial selection.
           if (!actionArgs.repeatIsExplicit && !vim.visualLine) {
             // This is a strange case. Here the implicit repeat is 1. The
             // following commands lets the cursor hover over the 1 character
             // selection.
             cm.setCursor(curEnd);
             cm.setSelection(curEnd, curStart);
           } else {
             cm.setSelection(curStart, curEnd);
           }
           CodeMirror.signal(cm, "vim-mode-change", {mode: "visual", subMode: vim.visualLine ? "linewise" : ""});
         } else {
           curStart = cm.getCursor('anchor');
           curEnd = cm.getCursor('head');
           if (!vim.visualLine && actionArgs.linewise) {
             // Shift-V pressed in characterwise visual mode. Switch to linewise
             // visual mode instead of exiting visual mode.
             vim.visualLine = true;
             curStart.ch = cursorIsBefore(curStart, curEnd) ? 0 :
                 lineLength(cm, curStart.line);
             curEnd.ch = cursorIsBefore(curStart, curEnd) ?
                 lineLength(cm, curEnd.line) : 0;
             cm.setSelection(curStart, curEnd);
             CodeMirror.signal(cm, "vim-mode-change", {mode: "visual", subMode: "linewise"});
           } else if (vim.visualLine && !actionArgs.linewise) {
             // v pressed in linewise visual mode. Switch to characterwise visual
             // mode instead of exiting visual mode.
             vim.visualLine = false;
             CodeMirror.signal(cm, "vim-mode-change", {mode: "visual"});
           } else {
             exitVisualMode(cm);
           }
         }
         updateMark(cm, vim, '<', cursorIsBefore(curStart, curEnd) ? curStart
             : curEnd);
         updateMark(cm, vim, '>', cursorIsBefore(curStart, curEnd) ? curEnd
             : curStart);
       },
       reselectLastSelection: function(cm, _actionArgs, vim) {
         if (vim.lastSelection) {
           var lastSelection = vim.lastSelection;
           cm.setSelection(lastSelection.curStart, lastSelection.curEnd);
           if (lastSelection.visualLine) {
             vim.visualMode = true;
             vim.visualLine = true;
           }
           else {
             vim.visualMode = true;
             vim.visualLine = false;
           }
           CodeMirror.signal(cm, "vim-mode-change", {mode: "visual", subMode: vim.visualLine ? "linewise" : ""});
         }
       },
       joinLines: function(cm, actionArgs, vim) {
         var curStart, curEnd;
         if (vim.visualMode) {
           curStart = cm.getCursor('anchor');
           curEnd = cm.getCursor('head');
           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;
         cm.operation(function() {
           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);
           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) {
         var cur = copyCursor(cm.getCursor());
         var register = vimGlobalState.registerController.getRegister(
             actionArgs.registerName);
         var text = register.toString();
         if (!text) {
           return;
         }
         if (actionArgs.repeat > 1) {
           var text = Array(actionArgs.repeat + 1).join(text);
         }
         var linewise = register.linewise;
         if (linewise) {
           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 {
           cur.ch += actionArgs.after ? 1 : 0;
         }
         cm.replaceRange(text, cur);
         // Now fine tune the cursor to where we want it.
         var curPosFinal;
         var idx;
         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);
         }
         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;
         if (vim.visualMode){
           curStart=cm.getCursor('start');
           curEnd=cm.getCursor('end');
           // workaround to catch the character under the cursor
           //  existing workaround doesn't cover actions
           curEnd=cm.clipPos(Pos(curEnd.line, curEnd.ch+1));
         }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);
           cm.replaceRange(replaceWithStr, curStart, curEnd);
           if (vim.visualMode){
             cm.setCursor(curStart);
             exitVisualMode(cm);
           }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 */);
       }
     };
     /*
      * 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) {
       return Pos(cur.line + offsetLine, cur.ch + offsetCh);
     }
     function matchKeysPartial(pressed, mapped) {
       for (var i = 0; i < pressed.length; i++) {
         // 'character' means any character. For mark, register commads, etc.
         if (pressed[i] != mapped[i] && mapped[i] != 'character') {
           return false;
         }
       }
       return true;
     }
     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 cusrorIsBetween(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 reverse(s){
       return s.split('').reverse().join('');
     }
     function trim(s) {
       if (s.trim) {
         return s.trim();
       }
       return s.replace(/^\s+|\s+$/g, '');
     }
     function escapeRegex(s) {
       return s.replace(/([.?*+$\[\]\/\\(){}|\-])/g, '\\$1');
     }
     function exitVisualMode(cm) {
       cm.off('mousedown', exitVisualMode);
       var vim = cm.state.vim;
       // can't use selection state here because yank has already reset its cursor
       vim.lastSelection = {'curStart': vim.marks['<'].find(),
         'curEnd': vim.marks['>'].find(), 'visualMode': vim.visualMode,
         'visualLine': vim.visualLine};
       vim.visualMode = false;
       vim.visualLine = false;
       var selectionStart = cm.getCursor('anchor');
       var selectionEnd = cm.getCursor('head');
       if (!cursorEqual(selectionStart, selectionEnd)) {
         // Clear the selection and set the cursor only if the selection has not
         // already been cleared. Otherwise we risk moving the cursor somewhere
         // it's not supposed to be.
         cm.setCursor(clipCursorToContent(cm, selectionEnd));
       }
       CodeMirror.signal(cm, "vim-mode-change", {mode: "normal"});
     }
     // 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 whitepsace.
         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 = cm.getCursor();
       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 textAfterIdx = line.substring(idx);
       var firstMatchedChar;
       if (noSymbol) {
         firstMatchedChar = textAfterIdx.search(/\w/);
       } else {
         firstMatchedChar = textAfterIdx.search(/\S/);
       }
       if (firstMatchedChar == -1) {
         return null;
       }
       idx += firstMatchedChar;
       textAfterIdx = line.substring(idx);
       var textBeforeIdx = line.substring(0, idx);
       var matchRegex;
       // Greedy matchers for the "word" we are trying to expand.
       if (bigWord) {
         matchRegex = /^\S+/;
       } else {
         if ((/\w/).test(line.charAt(idx))) {
           matchRegex = /^\w+/;
         } else {
           matchRegex = /^[^\w\s]+/;
         }
       }
       var wordAfterRegex = matchRegex.exec(textAfterIdx);
       var wordStart = idx;
       var wordEnd = idx + wordAfterRegex[0].length;
       // TODO: Find a better way to do this. It will be slow on very long lines.
       var revTextBeforeIdx = reverse(textBeforeIdx);
       var wordBeforeRegex = matchRegex.exec(revTextBeforeIdx);
       if (wordBeforeRegex) {
         wordStart -= wordBeforeRegex[0].length;
       }
       if (inclusive) {
         // If present, trim all whitespace after word.
         // Otherwise, trim all whitespace before word.
         var textAfterWordEnd = line.substring(wordEnd);
         var whitespacesAfterWord = textAfterWordEnd.match(/^\s*/)[0].length;
         if (whitespacesAfterWord > 0) {
           wordEnd += whitespacesAfterWord;
         } else {
           var revTrim = revTextBeforeIdx.length - wordStart;
           var textBeforeWordStart = revTextBeforeIdx.substring(revTrim);
           var whitespacesBeforeWord = textBeforeWordStart.match(/^\s*/)[0].length;
           wordStart -= whitespacesBeforeWord;
         }
       }
       return { start: Pos(cur.line, wordStart),
                end: Pos(cur.line, wordEnd) };
     }
     function recordJumpPosition(cm, oldCur, newCur) {
       if (!cursorEqual(oldCur, newCur)) {
         vimGlobalState.jumpList.add(cm, oldCur, newCur);
       }
     }
     function recordLastCharacterSearch(increment, args) {
         vimGlobalState.lastChararacterSearch.increment = increment;
         vimGlobalState.lastChararacterSearch.forward = args.forward;
         vimGlobalState.lastChararacterSearch.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 regexps = bigWord ? bigWordRegexp : wordRegexp;
       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 < regexps.length && !foundWord; ++i) {
             if (regexps[i].test(line.charAt(pos))) {
               wordStart = pos;
               // Advance to end of word.
               while (pos != stop && regexps[i].test(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;
       }
       // Should never get here.
       throw new Error('The impossible happened.');
     }
     /**
      * @param {CodeMirror} cm CodeMirror object.
      * @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, repeat, forward, wordEnd, bigWord) {
       var cur = cm.getCursor();
       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 getContextLevel(ctx) {
       return (ctx === 'string' || ctx === 'comment') ? 1 : 0;
     }
     function findMatchedSymbol(cm, cur, symb) {
       var line = cur.line;
       var ch = cur.ch;
       symb = symb ? symb : cm.getLine(line).charAt(ch);
       var symbContext = cm.getTokenAt(Pos(line, ch + 1)).type;
       var symbCtxLevel = getContextLevel(symbContext);
       var reverseSymb = ({
         '(': ')', ')': '(',
         '[': ']', ']': '[',
         '{': '}', '}': '{'})[symb];
       // Couldn't find a matching symbol, abort
       if (!reverseSymb) {
         return cur;
       }
       // set our increment to move forward (+1) or backwards (-1)
       // depending on which bracket we're matching
       var increment = ({'(': 1, '{': 1, '[': 1})[symb] || -1;
       var endLine = increment === 1 ? cm.lineCount() : -1;
       var depth = 1, nextCh = symb, index = ch, lineText = cm.getLine(line);
       // Simple search for closing paren--just count openings and closings till
       // we find our match
       // TODO: use info from CodeMirror to ignore closing brackets in comments
       // and quotes, etc.
       while (line !== endLine && depth > 0) {
         index += increment;
         nextCh = lineText.charAt(index);
         if (!nextCh) {
           line += increment;
           lineText = cm.getLine(line) || '';
           if (increment > 0) {
             index = 0;
           } else {
             var lineLen = lineText.length;
             index = (lineLen > 0) ? (lineLen-1) : 0;
           }
           nextCh = lineText.charAt(index);
         }
         var revSymbContext = cm.getTokenAt(Pos(line, index + 1)).type;
         var revSymbCtxLevel = getContextLevel(revSymbContext);
         if (symbCtxLevel >= revSymbCtxLevel) {
           if (nextCh === symb) {
             depth++;
           } else if (nextCh === reverseSymb) {
             depth--;
           }
         }
       }
       if (nextCh) {
         return Pos(line, index);
       }
       return cur;
     }
     // TODO: perhaps this finagling of start and end positions belonds
     // in codmirror/replaceRange?
     function selectCompanionObject(cm, revSymb, inclusive) {
       var cur = copyCursor(cm.getCursor());
       var end = findMatchedSymbol(cm, cur, revSymb);
       var start = findMatchedSymbol(cm, end);
       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, symb, inclusive) {
       var cur = copyCursor(cm.getCursor());
       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;
       }
     };
     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 });
       }
       else {
         onClose(prompt(shortText, ''));
       }
     }
     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 = (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 (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 '$[0..9]') and follows different rules for escaping '$'.
     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 (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.
     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());
         }
         if (stream.match('\\/', true)) {
           // \/ => /
           output.push('/');
         } else if (stream.match('\\\\', true)) {
           // \\ => \
           output.push('\\');
         } else {
           // 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) {
       // 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 = '';
       if (prefix) {
         raw += '<span style="font-family: monospace">' + prefix + '</span>';
       }
       raw += '<input type="text"/> ' +
           '<span style="color: #888">';
       if (desc) {
         raw += '<span style="color: #888">';
         raw += desc;
         raw += '</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 overlay = getSearchState(cm).getOverlay();
       if (!overlay || query != overlay.query) {
         if (overlay) {
           cm.removeOverlay(overlay);
         }
         overlay = searchOverlay(query);
         cm.addOverlay(overlay);
         getSearchState(cm).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) {
       cm.removeOverlay(getSearchState(cm).getOverlay());
       getSearchState(cm).setOverlay(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};
     }
     // Ex command handling
     // 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: 'map' },
       { 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: 'set' },
       { name: 'sort', shortName: 'sor' },
       { name: 'substitute', shortName: 's' },
       { name: 'nohlsearch', shortName: 'noh' },
       { name: 'delmarks', shortName: 'delm' },
       { name: 'registers', shortName: 'reg' }
     ];
     Vim.ExCommandDispatcher = function() {
       this.buildCommandMap_();
     };
     Vim.ExCommandDispatcher.prototype = {
       processCommand: function(cm, input) {
         var vim = cm.state.vim;
         if (vim.visualMode) {
           exitVisualMode(cm);
         }
         var inputStream = new CodeMirror.StringStream(input);
         var params = {};
         params.input = input;
         try {
           this.parseInput_(cm, inputStream, params);
         } catch(e) {
           showConfirm(cm, e);
           throw e;
         }
         var commandName;
         if (!params.commandName) {
           // If only a line range is defined, move to the line.
           if (params.line !== undefined) {
             commandName = 'move';
           }
         } else {
           var command = this.matchCommand_(params.commandName);
           if (command) {
             commandName = command.name;
             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]);
               }
               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);
         } 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 mark = cm.state.vim.marks[inputStream.next()];
             if (mark && mark.find()) {
               return mark.find().line;
             }
             throw new Error('Mark not set');
           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: parseKeyString(rhs),
               user: true
             };
           }
         } else {
           if (rhs != ':' && rhs.charAt(0) == ':') {
             // Key to Ex mapping.
             var mapping = {
               keys: parseKeyString(lhs),
               type: 'keyToEx',
               exArgs: { input: rhs.substring(1) },
               user: true};
             if (ctx) { mapping.context = ctx; }
             defaultKeymap.unshift(mapping);
           } else {
             // Key to key mapping
             var mapping = {
               keys: parseKeyString(lhs),
               type: 'keyToKey',
               toKeys: parseKeyString(rhs),
               user: true
             };
             if (ctx) { mapping.context = ctx; }
             defaultKeymap.unshift(mapping);
           }
         }
       },
       unmap: function(lhs, ctx) {
         var arrayEquals = function(a, b) {
           if (a === b) return true;
           if (a == null || b == null) return true;
           if (a.length != b.length) return false;
           for (var i = 0; i < a.length; i++) {
             if (a[i] !== b[i]) return false;
           }
           return true;
         };
         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 = parseKeyString(lhs);
           for (var i = 0; i < defaultKeymap.length; i++) {
             if (arrayEquals(keys, defaultKeymap[i].keys)
                 && defaultKeymap[i].context === ctx
                 && defaultKeymap[i].user) {
               defaultKeymap.splice(i, 1);
               return;
             }
           }
         }
         throw Error('No such mapping.');
       }
     };
     // Converts a key string sequence of the form a<C-w>bd<Left> into Vim's
     // keymap representation.
     function parseKeyString(str) {
       var key, match;
       var keys = [];
       while (str) {
         match = (/<\w+-.+?>|<\w+>|./).exec(str);
         if (match === null)break;
         key = match[0];
         str = str.substring(match.index + key.length);
         keys.push(key);
       }
       return keys;
     }
     var exCommands = {
       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);
       },
       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;
         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 (!optionIsBoolean && !value || forceGet) {
           var oldValue = getOption(optionName);
           // If no value is provided, then we assume this is a get.
           if (oldValue === true || oldValue === false) {
             showConfirm(cm, ' ' + (oldValue ? '' : 'no') + optionName);
           } else {
             showConfirm(cm, '  ' + optionName + '=' + oldValue);
           }
         } else {
           setOption(optionName, value);
         }
       },
       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.text + '<br>';
           }
         }
         showConfirm(cm, regInfo);
       },
       sort: function(cm, params) {
         var reverse, ignoreCase, unique, number;
         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(/[a-z]+/);
             if (opts) {
               opts = opts[0];
               ignoreCase = opts.indexOf('i') != -1;
               unique = opts.indexOf('u') != -1;
               var decimal = opts.indexOf('d') != -1 && 1;
               var hex = opts.indexOf('x') != -1 && 1;
               var octal = opts.indexOf('o') != -1 && 1;
               if (decimal + hex + octal > 1) { return 'Invalid arguments'; }
               number = decimal && 'decimal' || hex && 'hex' || octal && 'octal';
             }
             if (args.eatSpace() && args.match(/\/.*\//)) { 'patterns not supported'; }
           }
         }
         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 = (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) {
           for (var i = 0; i < text.length; i++) {
             if (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;
         }
         numPart.sort(compareFn);
         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);
       },
       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 slashes = findUnescapedSlashes(argString);
         if (slashes[0] !== 0) {
           showConfirm(cm, 'Substitutions should be of the form ' +
               ':s/pattern/replace/');
           return;
         }
         var regexPart = argString.substring(slashes[0] + 1, slashes[1]);
         var replacePart = '';
         var flagsPart;
         var count;
         var confirm = false; // Whether to confirm each replace.
         if (slashes[1]) {
           replacePart = argString.substring(slashes[1] + 1, slashes[2]);
           if (getOption('pcre')) {
             replacePart = unescapeRegexReplace(replacePart);
           } else {
             replacePart = translateRegexReplace(replacePart);
           }
         }
         if (slashes[2]) {
           // After the 3rd slash, we can have flags followed by a space followed
           // by count.
           var trailing = argString.substring(slashes[2] + 1).split(' ');
           flagsPart = trailing[0];
           count = parseInt(trailing[1]);
         }
         if (flagsPart) {
           if (flagsPart.indexOf('c') != -1) {
             confirm = true;
             flagsPart.replace('c', '');
           }
           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;
           }
         }
         var state = getSearchState(cm);
         var query = state.getQuery();
         var lineStart = (params.line !== undefined) ? params.line : cm.getCursor().line;
         var lineEnd = params.lineEnd || lineStart;
         if (count) {
           lineStart = lineEnd;
           lineEnd = lineStart + count - 1;
         }
         var startPos = clipCursorToContent(cm, Pos(lineStart, 0));
         var cursor = cm.getSearchCursor(query, startPos);
         doReplace(cm, confirm, lineStart, lineEnd, cursor, query, replacePart);
       },
       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 {
           // Saves to text area if no save command is defined.
           cm.save();
         }
       },
       nohlsearch: function(cm) {
         clearSearchHighlight(cm);
       },
       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 Vim.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.
     */
     function doReplace(cm, confirm, lineStart, lineEnd, searchCursor, query,
         replaceWith) {
       // 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() {
         var found = searchCursor.findNext();
         if (!found) {
           done = true;
         } else if (isInRange(searchCursor.from(), lineStart, lineEnd)) {
           cm.scrollIntoView(searchCursor.from(), 30);
           cm.setSelection(searchCursor.from(), searchCursor.to());
           lastPos = searchCursor.from();
           done = false;
         } else {
           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;
         }
       }
       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':
             cm.operation(replaceAll); break;
           case 'L':
             replace();
             // fall through and exit.
           case 'Q':
           case 'Esc':
           case 'Ctrl-C':
           case 'Ctrl-[':
             stop(close);
             break;
         }
         if (done) { stop(close); }
       }
       // Actually do replace.
       next();
       if (done) {
         showConfirm(cm, 'No matches for ' + query.source);
         return;
       }
       if (!confirm) {
         replaceAll();
         return;
       }
       showPrompt(cm, {
         prefix: 'replace with <strong>' + replaceWith + '</strong> (y/n/a/q/l)',
         onKeyDown: onPromptKeyDown
       });
     }
     // Register Vim with CodeMirror
     function buildVimKeyMap() {
       /**
        * Handle the raw key event from CodeMirror. Translate the
        * Shift + key modifier to the resulting letter, while preserving other
        * modifers.
        */
       function cmKeyToVimKey(key, modifier) {
         var vimKey = key;
         if (isUpperCase(vimKey) && modifier == 'Ctrl') {
             vimKey = vimKey.toLowerCase();
         }
         if (modifier) {
           // Vim will parse modifier+key combination as a single key.
           vimKey = modifier.charAt(0) + '-' + vimKey;
         }
         var specialKey = ({Enter:'CR',Backspace:'BS',Delete:'Del'})[vimKey];
         vimKey = specialKey ? specialKey : vimKey;
         vimKey = vimKey.length > 1 ? '<'+ vimKey + '>' : vimKey;
         return vimKey;
       }
       // Closure to bind CodeMirror, key, modifier.
       function keyMapper(vimKey) {
         return function(cm) {
           CodeMirror.Vim.handleKey(cm, vimKey);
         };
       }
       var cmToVimKeymap = {
         'nofallthrough': true,
         'style': 'fat-cursor'
       };
       function bindKeys(keys, modifier) {
         for (var i = 0; i < keys.length; i++) {
           var key = keys[i];
           if (!modifier && key.length == 1) {
             // Wrap all keys without modifiers with '' to identify them by their
             // key characters instead of key identifiers.
             key = "'" + key + "'";
           }
           var vimKey = cmKeyToVimKey(keys[i], modifier);
           var cmKey = modifier ? modifier + '-' + key : key;
           cmToVimKeymap[cmKey] = keyMapper(vimKey);
         }
       }
       bindKeys(upperCaseAlphabet);
       bindKeys(lowerCaseAlphabet);
       bindKeys(upperCaseAlphabet, 'Ctrl');
       bindKeys(specialSymbols);
       bindKeys(specialSymbols, 'Ctrl');
       bindKeys(numbers);
       bindKeys(numbers, 'Ctrl');
       bindKeys(specialKeys);
       bindKeys(specialKeys, 'Ctrl');
       return cmToVimKeymap;
     }
     CodeMirror.keyMap.vim = buildVimKeyMap();
     function exitInsertMode(cm) {
       var vim = cm.state.vim;
       var macroModeState = vimGlobalState.macroModeState;
       var isPlaying = macroModeState.isPlaying;
       if (!isPlaying) {
         cm.off('change', onChange);
         cm.off('cursorActivity', onCursorActivity);
         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;
       cm.setCursor(cm.getCursor().line, cm.getCursor().ch-1);
       vim.insertMode = false;
       cm.setOption('keyMap', 'vim');
       cm.setOption('disableInput', true);
       cm.toggleOverwrite(false); // exit replace mode if we were in it.
       CodeMirror.signal(cm, "vim-mode-change", {mode: "normal"});
       if (macroModeState.isRecording) {
         logInsertModeChange(macroModeState);
       }
     }
     CodeMirror.keyMap['vim-insert'] = {
       // TODO: override navigation keys so that Esc will cancel automatic
       // indentation from o, O, i_<CR>
       'Esc': exitInsertMode,
       'Ctrl-[': exitInsertMode,
       'Ctrl-C': exitInsertMode,
       'Ctrl-N': 'autocomplete',
       'Ctrl-P': 'autocomplete',
       'Enter': function(cm) {
         var fn = CodeMirror.commands.newlineAndIndentContinueComment ||
             CodeMirror.commands.newlineAndIndent;
         fn(cm);
       },
       fallthrough: ['default']
     };
     CodeMirror.keyMap['vim-replace'] = {
       'Backspace': 'goCharLeft',
       fallthrough: ['vim-insert']
     };
     function executeMacroRegister(cm, vim, macroModeState, registerName) {
       var register = vimGlobalState.registerController.getRegister(registerName);
       var keyBuffer = register.keyBuffer;
       var imc = 0;
       macroModeState.isPlaying = true;
       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);
           if (vim.insertMode) {
             repeatInsertModeChanges(
                 cm, register.insertModeChanges[imc++].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(macroModeState.lastInsertModeChanges);
       }
     }
     /**
      * 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');
             lastChange.changes.push(text);
           }
           // Change objects may be chained with next.
           changeObj = changeObj.next;
         }
       }
     }
     /**
     * Listens for any kind of cursor activity on CodeMirror.
     * - For tracking cursor activity in insert mode.
     * - Should only be active in insert mode.
     */
     function onCursorActivity() {
       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.changes = [];
       }
     }
     /** 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);
       function onKeyFound() {
         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;
           // This isn't strictly necessary, but since lastInsertModeChanges is
           // supposed to be immutable during replay, this helps catch bugs.
           macroModeState.lastInsertModeChanges = {};
           repeatInsertModeChanges(cm, changeObject.changes, repeat);
           macroModeState.lastInsertModeChanges = changeObject;
         }
       }
       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;
       }
       for (var i = 0; i < repeat; i++) {
         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);
           }
         }
       }
     }
     resetVimGlobalState();
     return vimApi;
   };
   // Initialize Vim and make it available as an API.
   CodeMirror.Vim = Vim();
 });