IPython/frontend/html/notebook/static/codemirror/keymap/vim.js

// Supported keybindings:
//
// Cursor movement:
// h, j, k, l
// e, E, w, W, b, B
// Ctrl-f, Ctrl-b
// Ctrl-n, Ctrl-p
// $, ^, 0
// G
// ge, gE
// gg
// f<char>, F<char>, t<char>, T<char>
// Ctrl-o, Ctrl-i TODO (FIXME - Ctrl-O wont work in Chrome)
// /, ?, n, N TODO (does not work)
// #, * TODO
//
// Entering insert mode:
// i, I, a, A, o, O
// s
// ce, cb (without support for number of actions like c3e - TODO)
// cc
// S, C TODO
// cf<char>, cF<char>, ct<char>, cT<char>
//
// Deleting text:
// x, X
// J
// dd, D
// de, db (without support for number of actions like d3e - TODO)
// df<char>, dF<char>, dt<char>, dT<char>
//
// Yanking and pasting:
// yy, Y
// p, P
// p'<char> TODO - test
// y'<char> TODO - test
// m<char> TODO - test
//
// Changing text in place:
// ~
// r<char>
//
// Visual mode:
// v, V TODO
//
// Misc:
// . TODO
//

(function() {
  var count = "";
  var sdir = "f";
  var buf = "";
  var yank = 0;
  var mark = [];
  var reptTimes = 0;
  function emptyBuffer() { buf = ""; }
  function pushInBuffer(str) { buf += str; }
  function pushCountDigit(digit) { return function(cm) {count += digit;}; }
  function popCount() { var i = parseInt(count, 10); count = ""; return i || 1; }
  function iterTimes(func) {
    for (var i = 0, c = popCount(); i < c; ++i) func(i, i == c - 1);
  }
  function countTimes(func) {
    if (typeof func == "string") func = CodeMirror.commands[func];
    return function(cm) { iterTimes(function () { func(cm); }); };
  }

  function iterObj(o, f) {
    for (var prop in o) if (o.hasOwnProperty(prop)) f(prop, o[prop]);
  }
  function iterList(l, f) {
    for (var i in l) f(l[i]);
  }
  function toLetter(ch) {
    // T -> t, Shift-T -> T, '*' -> *, "Space" -> " "
    if (ch.slice(0, 6) == "Shift-") {
      return ch.slice(0, 1);
    } else {
      if (ch == "Space") return " ";
      if (ch.length == 3 && ch[0] == "'" && ch[2] == "'") return ch[1];
      return ch.toLowerCase();
    }
  }
  var SPECIAL_SYMBOLS = "~`!@#$%^&*()_-+=[{}]\\|/?.,<>:;\"\'1234567890";
  function toCombo(ch) {
    // t -> T, T -> Shift-T, * -> '*', " " -> "Space"
    if (ch == " ") return "Space";
    var specialIdx = SPECIAL_SYMBOLS.indexOf(ch);
    if (specialIdx != -1) return "'" + ch + "'";
    if (ch.toLowerCase() == ch) return ch.toUpperCase();
    return "Shift-" + ch.toUpperCase();
  }

  var word = [/\w/, /[^\w\s]/], bigWord = [/\S/];
  function findWord(line, pos, dir, regexps) {
    var stop = 0, next = -1;
    if (dir > 0) { stop = line.length; next = 0; }
    var start = stop, end = stop;
    // Find bounds of next one.
    outer: for (; pos != stop; pos += dir) {
      for (var i = 0; i < regexps.length; ++i) {
        if (regexps[i].test(line.charAt(pos + next))) {
          start = pos;
          for (; pos != stop; pos += dir) {
            if (!regexps[i].test(line.charAt(pos + next))) break;
          }
          end = pos;
          break outer;
        }
      }
    }
    return {from: Math.min(start, end), to: Math.max(start, end)};
  }
  function moveToWord(cm, regexps, dir, times, where) {
    var cur = cm.getCursor();

    for (var i = 0; i < times; i++) {
      var line = cm.getLine(cur.line), startCh = cur.ch, word;
      while (true) {
        // If we're at start/end of line, start on prev/next respectivly
        if (cur.ch == line.length && dir > 0) {
          cur.line++;
          cur.ch = 0;
          line = cm.getLine(cur.line);
        } else if (cur.ch == 0 && dir < 0) {
          cur.line--;
          cur.ch = line.length;
          line = cm.getLine(cur.line);
        }
        if (!line) break;

        // On to the actual searching
        word = findWord(line, cur.ch, dir, regexps);
        cur.ch = word[where == "end" ? "to" : "from"];
        if (startCh == cur.ch && word.from != word.to) cur.ch = word[dir < 0 ? "from" : "to"];
        else break;
      }
    }
    return cur;
  }
  function joinLineNext(cm) {
    var cur = cm.getCursor(), ch = cur.ch, line = cm.getLine(cur.line);
    CodeMirror.commands.goLineEnd(cm);
    if (cur.line != cm.lineCount()) {
      CodeMirror.commands.goLineEnd(cm);
      cm.replaceSelection(" ", "end");
      CodeMirror.commands.delCharRight(cm);
    }
  }
  function delTillMark(cm, cHar) {
    var i = mark[cHar];
    if (i === undefined) {
      // console.log("Mark not set"); // TODO - show in status bar
      return;
    }
    var l = cm.getCursor().line, start = i > l ? l : i, end = i > l ? i : l;
    cm.setCursor(start);
    for (var c = start; c <= end; c++) {
      pushInBuffer("\n"+cm.getLine(start));
      cm.removeLine(start);
    }
  }
  function yankTillMark(cm, cHar) {
    var i = mark[cHar];
    if (i === undefined) {
      // console.log("Mark not set"); // TODO - show in status bar
      return;
    }
    var l = cm.getCursor().line, start = i > l ? l : i, end = i > l ? i : l;
    for (var c = start; c <= end; c++) {
      pushInBuffer("\n"+cm.getLine(c));
    }
    cm.setCursor(start);
  }
  function goLineStartText(cm) {
    // Go to the start of the line where the text begins, or the end for whitespace-only lines
    var cur = cm.getCursor(), firstNonWS = cm.getLine(cur.line).search(/\S/);
    cm.setCursor(cur.line, firstNonWS == -1 ? line.length : firstNonWS, true);
  }

  function charIdxInLine(cm, cHar, motion_options) {
    // Search for cHar in line.
    // motion_options: {forward, inclusive}
    // If inclusive = true, include it too.
    // If forward = true, search forward, else search backwards.
    // If char is not found on this line, do nothing
    var cur = cm.getCursor(), line = cm.getLine(cur.line), idx;
    var ch = toLetter(cHar), mo = motion_options;
    if (mo.forward) {
      idx = line.indexOf(ch, cur.ch + 1);
      if (idx != -1 && mo.inclusive) idx += 1;
    } else {
      idx = line.lastIndexOf(ch, cur.ch);
      if (idx != -1 && !mo.inclusive) idx += 1;
    }
    return idx;
  }

  function moveTillChar(cm, cHar, motion_options) {
    // Move to cHar in line, as found by charIdxInLine.
    var idx = charIdxInLine(cm, cHar, motion_options), cur = cm.getCursor();
    if (idx != -1) cm.setCursor({line: cur.line, ch: idx});
  }

  function delTillChar(cm, cHar, motion_options) {
    // delete text in this line, untill cHar is met,
    // as found by charIdxInLine.
    // If char is not found on this line, do nothing
    var idx = charIdxInLine(cm, cHar, motion_options);
    var cur = cm.getCursor();
    if (idx !== -1) {
      if (motion_options.forward) {
        cm.replaceRange("", {line: cur.line, ch: cur.ch}, {line: cur.line, ch: idx});
      } else {
        cm.replaceRange("", {line: cur.line, ch: idx}, {line: cur.line, ch: cur.ch});
      }
    }
  }

  function enterInsertMode(cm) {
    // enter insert mode: switch mode and cursor
    popCount();
    cm.setOption("keyMap", "vim-insert");
  }

  function dialog(cm, text, shortText, f) {
    if (cm.openDialog) cm.openDialog(text, f);
    else f(prompt(shortText, ""));
  }
  function showAlert(cm, text) {
    if (cm.openDialog) cm.openDialog(CodeMirror.htmlEscape(text) + " <button type=button>OK</button>");
    else alert(text);
  }

  // main keymap
  var map = CodeMirror.keyMap.vim = {
    // Pipe (|); TODO: should be *screen* chars, so need a util function to turn tabs into spaces?
    "'|'": function(cm) {
      cm.setCursor(cm.getCursor().line, popCount() - 1, true);
    },
    "A": function(cm) {
      cm.setCursor(cm.getCursor().line, cm.getCursor().ch+1, true);
      enterInsertMode(cm);
    },
    "Shift-A": function(cm) { CodeMirror.commands.goLineEnd(cm); enterInsertMode(cm);},
    "I": function(cm) { enterInsertMode(cm);},
    "Shift-I": function(cm) { goLineStartText(cm); enterInsertMode(cm);},
    "O": function(cm) {
      CodeMirror.commands.goLineEnd(cm);
      CodeMirror.commands.newlineAndIndent(cm);
      enterInsertMode(cm);
    },
    "Shift-O": function(cm) {
      CodeMirror.commands.goLineStart(cm);
      cm.replaceSelection("\n", "start");
      cm.indentLine(cm.getCursor().line);
      enterInsertMode(cm);
    },
    "G": function(cm) { cm.setOption("keyMap", "vim-prefix-g");},
    "Shift-D": function(cm) {
      // commented out verions works, but I left original, cause maybe
      // I don't know vim enouth to see what it does
      /* var cur = cm.getCursor();
      var f = {line: cur.line, ch: cur.ch}, t = {line: cur.line};
      pushInBuffer(cm.getRange(f, t));
      */
      emptyBuffer();
      mark["Shift-D"] = cm.getCursor(false).line;
      cm.setCursor(cm.getCursor(true).line);
      delTillMark(cm,"Shift-D"); mark = [];
    },

    "S": function (cm) {
      countTimes(function (_cm) {
        CodeMirror.commands.delCharRight(_cm);
      })(cm);
      enterInsertMode(cm);
    },
    "M": function(cm) {cm.setOption("keyMap", "vim-prefix-m"); mark = [];},
    "Y": function(cm) {cm.setOption("keyMap", "vim-prefix-y"); emptyBuffer(); yank = 0;},
    "Shift-Y": function(cm) {
      emptyBuffer();
      mark["Shift-D"] = cm.getCursor(false).line;
      cm.setCursor(cm.getCursor(true).line);
      yankTillMark(cm,"Shift-D"); mark = [];
    },
    "/": function(cm) {var f = CodeMirror.commands.find; f && f(cm); sdir = "f";},
    "'?'": function(cm) {
      var f = CodeMirror.commands.find;
      if (f) { f(cm); CodeMirror.commands.findPrev(cm); sdir = "r"; }
    },
    "N": function(cm) {
      var fn = CodeMirror.commands.findNext;
      if (fn) sdir != "r" ? fn(cm) : CodeMirror.commands.findPrev(cm);
    },
    "Shift-N": function(cm) {
      var fn = CodeMirror.commands.findNext;
      if (fn) sdir != "r" ? CodeMirror.commands.findPrev(cm) : fn.findNext(cm);
    },
    "Shift-G": function(cm) {
      count == "" ? cm.setCursor(cm.lineCount()) : cm.setCursor(parseInt(count, 10)-1);
      popCount();
      CodeMirror.commands.goLineStart(cm);
    },
    "':'": function(cm) {
      var exModeDialog = ': <input type="text" style="width: 90%"/>';
      dialog(cm, exModeDialog, ':', function(command) {
        if (command.match(/^\d+$/)) {
          cm.setCursor(command - 1, cm.getCursor().ch);
        } else {
          showAlert(cm, "Bad command: " + command);
        }
      });
    },
    nofallthrough: true, style: "fat-cursor"
  };

  // standard mode switching
  iterList(["d", "t", "T", "f", "F", "c", "r"],
      function (ch) {
        CodeMirror.keyMap.vim[toCombo(ch)] = function (cm) {
          cm.setOption("keyMap", "vim-prefix-" + ch);
          emptyBuffer();
        };
      });

  function addCountBindings(keyMap) {
    // Add bindings for number keys
    keyMap["0"] = function(cm) {
      count.length > 0 ? pushCountDigit("0")(cm) : CodeMirror.commands.goLineStart(cm);
    };
    for (var i = 1; i < 10; ++i) keyMap[i] = pushCountDigit(i);
  }
  addCountBindings(CodeMirror.keyMap.vim);

  // main num keymap
  // Add bindings that are influenced by number keys
  iterObj({
    "Left": "goColumnLeft", "Right": "goColumnRight",
    "Down": "goLineDown", "Up": "goLineUp", "Backspace": "goCharLeft",
    "Space": "goCharRight",
    "X": function(cm) {CodeMirror.commands.delCharRight(cm);},
    "P": function(cm) {
      var cur = cm.getCursor().line;
      if (buf!= "") {
        if (buf[0] == "\n") CodeMirror.commands.goLineEnd(cm);
        cm.replaceRange(buf, cm.getCursor());
      }
    },
    "Shift-X": function(cm) {CodeMirror.commands.delCharLeft(cm);},
    "Shift-J": function(cm) {joinLineNext(cm);},
    "Shift-P": function(cm) {
      var cur = cm.getCursor().line;
      if (buf!= "") {
        CodeMirror.commands.goLineUp(cm);
        CodeMirror.commands.goLineEnd(cm);
        cm.replaceSelection(buf, "end");
      }
      cm.setCursor(cur+1);
    },
    "'~'": function(cm) {
      var cur = cm.getCursor(), cHar = cm.getRange({line: cur.line, ch: cur.ch}, {line: cur.line, ch: cur.ch+1});
      cHar = cHar != cHar.toLowerCase() ? cHar.toLowerCase() : cHar.toUpperCase();
      cm.replaceRange(cHar, {line: cur.line, ch: cur.ch}, {line: cur.line, ch: cur.ch+1});
      cm.setCursor(cur.line, cur.ch+1);
    },
    "Ctrl-B": function(cm) {CodeMirror.commands.goPageUp(cm);},
    "Ctrl-F": function(cm) {CodeMirror.commands.goPageDown(cm);},
    "Ctrl-P": "goLineUp", "Ctrl-N": "goLineDown",
    "U": "undo", "Ctrl-R": "redo"
  }, function(key, cmd) { map[key] = countTimes(cmd); });

  // empty key maps
  iterList([
      "vim-prefix-d'",
      "vim-prefix-y'",
      "vim-prefix-df",
      "vim-prefix-dF",
      "vim-prefix-dt",
      "vim-prefix-dT",
      "vim-prefix-c",
      "vim-prefix-cf",
      "vim-prefix-cF",
      "vim-prefix-ct",
      "vim-prefix-cT",
      "vim-prefix-",
      "vim-prefix-f",
      "vim-prefix-F",
      "vim-prefix-t",
      "vim-prefix-T",
      "vim-prefix-r",
      "vim-prefix-m"
      ],
      function (prefix) {
        CodeMirror.keyMap[prefix] = {
          auto: "vim",
          nofallthrough: true,
          style: "fat-cursor"
        };
      });

  CodeMirror.keyMap["vim-prefix-g"] = {
    "E": countTimes(function(cm) { cm.setCursor(moveToWord(cm, word, -1, 1, "start"));}),
    "Shift-E": countTimes(function(cm) { cm.setCursor(moveToWord(cm, bigWord, -1, 1, "start"));}),
    "G": function (cm) { cm.setCursor({line: 0, ch: cm.getCursor().ch});},
    auto: "vim", nofallthrough: true, style: "fat-cursor"
  };

  CodeMirror.keyMap["vim-prefix-d"] = {
    "D": countTimes(function(cm) {
      pushInBuffer("\n"+cm.getLine(cm.getCursor().line));
      cm.removeLine(cm.getCursor().line);
      cm.setOption("keyMap", "vim");
    }),
    "'": function(cm) {
      cm.setOption("keyMap", "vim-prefix-d'");
      emptyBuffer();
    },
    "B": function(cm) {
      var cur = cm.getCursor();
      var line = cm.getLine(cur.line);
      var index = line.lastIndexOf(" ", cur.ch);

      pushInBuffer(line.substring(index, cur.ch));
      cm.replaceRange("", {line: cur.line, ch: index}, cur);
      cm.setOption("keyMap", "vim");
    },
    nofallthrough: true, style: "fat-cursor"
  };
  // FIXME - does not work for bindings like "d3e"
  addCountBindings(CodeMirror.keyMap["vim-prefix-d"]);

  CodeMirror.keyMap["vim-prefix-c"] = {
    "B": function (cm) {
      countTimes("delWordLeft")(cm);
      enterInsertMode(cm);
    },
    "C": function (cm) {
      iterTimes(function (i, last) {
        CodeMirror.commands.deleteLine(cm);
        if (i) {
          CodeMirror.commands.delCharRight(cm);
          if (last) CodeMirror.commands.deleteLine(cm);
        }
      });
      enterInsertMode(cm);
    },
    nofallthrough: true, style: "fat-cursor"
  };

  iterList(["vim-prefix-d", "vim-prefix-c", "vim-prefix-"], function (prefix) {
    iterList(["f", "F", "T", "t"],
      function (ch) {
        CodeMirror.keyMap[prefix][toCombo(ch)] = function (cm) {
          cm.setOption("keyMap", prefix + ch);
          emptyBuffer();
        };
      });
  });

  var MOTION_OPTIONS = {
    "t": {inclusive: false, forward: true},
    "f": {inclusive: true,  forward: true},
    "T": {inclusive: false, forward: false},
    "F": {inclusive: true,  forward: false}
  };

  function setupPrefixBindingForKey(m) {
    CodeMirror.keyMap["vim-prefix-m"][m] = function(cm) {
      mark[m] = cm.getCursor().line;
    };
    CodeMirror.keyMap["vim-prefix-d'"][m] = function(cm) {
      delTillMark(cm,m);
    };
    CodeMirror.keyMap["vim-prefix-y'"][m] = function(cm) {
      yankTillMark(cm,m);
    };
    CodeMirror.keyMap["vim-prefix-r"][m] = function (cm) {
      var cur = cm.getCursor();
      cm.replaceRange(toLetter(m),
          {line: cur.line, ch: cur.ch},
          {line: cur.line, ch: cur.ch + 1});
      CodeMirror.commands.goColumnLeft(cm);
    };
    // all commands, related to motions till char in line
    iterObj(MOTION_OPTIONS, function (ch, options) {
      CodeMirror.keyMap["vim-prefix-" + ch][m] = function(cm) {
        moveTillChar(cm, m, options);
      };
      CodeMirror.keyMap["vim-prefix-d" + ch][m] = function(cm) {
        delTillChar(cm, m, options);
      };
      CodeMirror.keyMap["vim-prefix-c" + ch][m] = function(cm) {
        delTillChar(cm, m, options);
        enterInsertMode(cm);
      };
    });
  }
  for (var i = 65; i < 65 + 26; i++) { // uppercase alphabet char codes
    var ch = String.fromCharCode(i);
    setupPrefixBindingForKey(toCombo(ch));
    setupPrefixBindingForKey(toCombo(ch.toLowerCase()));
  }
  iterList(SPECIAL_SYMBOLS, function (ch) {
    setupPrefixBindingForKey(toCombo(ch));
  });
  setupPrefixBindingForKey("Space");

  CodeMirror.keyMap["vim-prefix-y"] = {
    "Y": countTimes(function(cm) { pushInBuffer("\n"+cm.getLine(cm.getCursor().line+yank)); yank++; }),
    "'": function(cm) {cm.setOption("keyMap", "vim-prefix-y'"); emptyBuffer();},
    nofallthrough: true, style: "fat-cursor"
  };

  CodeMirror.keyMap["vim-insert"] = {
    // TODO: override navigation keys so that Esc will cancel automatic indentation from o, O, i_<CR>
    "Esc": function(cm) {
      cm.setCursor(cm.getCursor().line, cm.getCursor().ch-1, true);
      cm.setOption("keyMap", "vim");
    },
    "Ctrl-N": "autocomplete",
    "Ctrl-P": "autocomplete",
    fallthrough: ["default"]
  };

  function findMatchedSymbol(cm, cur, symb) {
    var line = cur.line;
    var symb = symb ? symb : cm.getLine(line)[cur.ch];

    // Are we at the opening or closing char
    var forwards = ['(', '[', '{'].indexOf(symb) != -1;

    var reverseSymb = (function(sym) {
      switch (sym) {
        case '(' : return ')';
        case '[' : return ']';
        case '{' : return '}';
        case ')' : return '(';
        case ']' : return '[';
        case '}' : return '{';
        default : return null;
      }
    })(symb);

    // Couldn't find a matching symbol, abort
    if (reverseSymb == null) return cur;

    // Tracking our imbalance in open/closing symbols. An opening symbol wii be
    // the first thing we pick up if moving forward, this isn't true moving backwards
    var disBal = forwards ? 0 : 1;

    while (true) {
      if (line == cur.line) {
        // First pass, do some special stuff
        var currLine =  forwards ? cm.getLine(line).substr(cur.ch).split('') : cm.getLine(line).substr(0,cur.ch).split('').reverse();
      } else {
        var currLine =  forwards ? cm.getLine(line).split('') : cm.getLine(line).split('').reverse();
      }

      for (var index = 0;  index < currLine.length; index++) {
        if (currLine[index] == symb) disBal++;
        else if (currLine[index] == reverseSymb) disBal--;

        if (disBal == 0) {
          if (forwards && cur.line == line) return {line: line, ch: index + cur.ch};
          else if (forwards) return {line: line, ch: index};
          else return {line: line, ch: currLine.length - index - 1 };
        }
      }

      if (forwards) line++;
      else line--;
    }
  }

  function selectCompanionObject(cm, revSymb, inclusive) {
    var cur = cm.getCursor();

    var end = findMatchedSymbol(cm, cur, revSymb);
    var start = findMatchedSymbol(cm, end);
    start.ch += inclusive ? 1 : 0;
    end.ch += inclusive ? 0 : 1;

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

  // These are our motion commands to be used for navigation and selection with
  // certian other commands. All should return a cursor object.
  var motionList = ['B', 'E', 'J', 'K', 'H', 'L', 'W', 'Shift-W', "'^'", "'$'", "'%'", 'Esc'];

  motions = {
    'B': function(cm, times) { return moveToWord(cm, word, -1, times); },
    'Shift-B': function(cm, times) { return moveToWord(cm, bigWord, -1, times); },
    'E': function(cm, times) { return moveToWord(cm, word, 1, times, 'end'); },
    'Shift-E': function(cm, times) { return moveToWord(cm, bigWord, 1, times, 'end'); },
    'J': function(cm, times) {
      var cur = cm.getCursor();
      return {line: cur.line+times, ch : cur.ch};
    },

    'K': function(cm, times) {
      var cur = cm.getCursor();
      return {line: cur.line-times, ch: cur.ch};
    },

    'H': function(cm, times) {
      var cur = cm.getCursor();
      return {line: cur.line, ch: cur.ch-times};
    },

    'L': function(cm, times) {
      var cur = cm.getCursor();
      return {line: cur.line, ch: cur.ch+times};
    },
    'W': function(cm, times) { return moveToWord(cm, word, 1, times); },
    'Shift-W': function(cm, times) { return moveToWord(cm, bigWord, 1, times); },
    "'^'": function(cm, times) {
      var cur = cm.getCursor();
      var line = cm.getLine(cur.line).split('');

      // Empty line :o
      if (line.length == 0) return cur;

      for (var index = 0;  index < line.length; index++) {
        if (line[index].match(/[^\s]/)) return {line: cur.line, ch: index};
      }
    },
    "'$'": function(cm) {
      var cur = cm.getCursor();
      var line = cm.getLine(cur.line);
      return {line: cur.line, ch: line.length};
    },
    "'%'": function(cm) { return findMatchedSymbol(cm, cm.getCursor()); },
    "Esc" : function(cm) {
      cm.setOption('vim');
      reptTimes = 0;

      return cm.getCursor();
    }
  };

  // Map our movement actions each operator and non-operational movement
  motionList.forEach(function(key, index, array) {
    CodeMirror.keyMap['vim-prefix-d'][key] = function(cm) {
      // Get our selected range
      var start = cm.getCursor();
      var end = motions[key](cm, reptTimes ? reptTimes : 1);

      // Set swap var if range is of negative length
      if ((start.line > end.line) || (start.line == end.line && start.ch > end.ch)) var swap = true;

      // Take action, switching start and end if swap var is set
      pushInBuffer(cm.getRange(swap ? end : start, swap ? start : end));
      cm.replaceRange("", swap ? end : start, swap ? start : end);

      // And clean up
      reptTimes = 0;
      cm.setOption("keyMap", "vim");
    };

    CodeMirror.keyMap['vim-prefix-c'][key] = function(cm) {
      var start = cm.getCursor();
      var end = motions[key](cm, reptTimes ? reptTimes : 1);

      if ((start.line > end.line) || (start.line == end.line && start.ch > end.ch)) var swap = true;
      pushInBuffer(cm.getRange(swap ? end : start, swap ? start : end));
      cm.replaceRange("", swap ? end : start, swap ? start : end);

      reptTimes = 0;
      cm.setOption('keyMap', 'vim-insert');
    };

    CodeMirror.keyMap['vim-prefix-y'][key] = function(cm) {
      var start = cm.getCursor();
      var end = motions[key](cm, reptTimes ? reptTimes : 1);

      if ((start.line > end.line) || (start.line == end.line && start.ch > end.ch)) var swap = true;
      pushInBuffer(cm.getRange(swap ? end : start, swap ? start : end));

      reptTimes = 0;
      cm.setOption("keyMap", "vim");
    };

    CodeMirror.keyMap['vim'][key] = function(cm) {
      var cur = motions[key](cm, reptTimes ? reptTimes : 1);
      cm.setCursor(cur.line, cur.ch);

      reptTimes = 0;
    };
  });

  var nums = [1,2,3,4,5,6,7,8,9];
  nums.forEach(function(key, index, array) {
    CodeMirror.keyMap['vim'][key] = function (cm) {
      reptTimes = (reptTimes * 10) + key;
    };
    CodeMirror.keyMap['vim-prefix-d'][key] = function (cm) {
      reptTimes = (reptTimes * 10) + key;
    };
    CodeMirror.keyMap['vim-prefix-y'][key] = function (cm) {
      reptTimes = (reptTimes * 10) + key;
    };
    CodeMirror.keyMap['vim-prefix-c'][key] = function (cm) {
      reptTimes = (reptTimes * 10) + key;
    };
  });

  // Create our keymaps for each operator and make xa and xi where x is an operator
  // change to the corrosponding keymap
  var operators = ['d', 'y', 'c'];
  operators.forEach(function(key, index, array) {
    CodeMirror.keyMap['vim-prefix-'+key+'a'] = {
      auto: 'vim', nofallthrough: true, style: "fat-cursor"
    };
    CodeMirror.keyMap['vim-prefix-'+key+'i'] = {
      auto: 'vim', nofallthrough: true, style: "fat-cursor"
    };

    CodeMirror.keyMap['vim-prefix-'+key]['A'] = function(cm) {
      reptTimes = 0;
      cm.setOption('keyMap', 'vim-prefix-' + key + 'a');
    };

    CodeMirror.keyMap['vim-prefix-'+key]['I'] = function(cm) {
      reptTimes = 0;
      cm.setOption('keyMap', 'vim-prefix-' + key + 'i');
    };
  });

  function regexLastIndexOf(string, pattern, startIndex) {
    for (var i = startIndex == null ? string.length : startIndex; i >= 0; --i)
      if (pattern.test(string.charAt(i))) return i;
    return -1;
  }

  // Create our text object functions. They work similar to motions but they
  // return a start cursor as well
  var textObjectList = ['W', 'Shift-[', 'Shift-9', '['];
  var textObjects = {
    'W': function(cm, inclusive) {
      var cur = cm.getCursor();
      var line = cm.getLine(cur.line);

      var line_to_char = new String(line.substring(0, cur.ch));
      var start = regexLastIndexOf(line_to_char, /[^a-zA-Z0-9]/) + 1;
      var end = motions["E"](cm, 1) ;

      end.ch += inclusive ? 1 : 0 ;
      return {start: {line: cur.line, ch: start}, end: end };
    },
    'Shift-[': function(cm, inclusive) { return selectCompanionObject(cm, '}', inclusive); },
    'Shift-9': function(cm, inclusive) { return selectCompanionObject(cm, ')', inclusive); },
    '[': function(cm, inclusive) { return selectCompanionObject(cm, ']', inclusive); }
  };

  // One function to handle all operation upon text objects. Kinda funky but it works
  // better than rewriting this code six times
  function textObjectManipulation(cm, object, remove, insert, inclusive) {
    // Object is the text object, delete object if remove is true, enter insert
    // mode if insert is true, inclusive is the difference between a and i
    var tmp = textObjects[object](cm, inclusive);
    var start = tmp.start;
    var end = tmp.end;

    if ((start.line > end.line) || (start.line == end.line && start.ch > end.ch)) var swap = true ;

    pushInBuffer(cm.getRange(swap ? end : start, swap ? start : end));
    if (remove) cm.replaceRange("", swap ? end : start, swap ? start : end);
    if (insert) cm.setOption('keyMap', 'vim-insert');
  }

  // And finally build the keymaps up from the text objects
  for (var i = 0; i < textObjectList.length; ++i) {
    var object = textObjectList[i];
    (function(object) {
      CodeMirror.keyMap['vim-prefix-di'][object] = function(cm) { textObjectManipulation(cm, object, true, false, false); };
      CodeMirror.keyMap['vim-prefix-da'][object] = function(cm) { textObjectManipulation(cm, object, true, false, true); };
      CodeMirror.keyMap['vim-prefix-yi'][object] = function(cm) { textObjectManipulation(cm, object, false, false, false); };
      CodeMirror.keyMap['vim-prefix-ya'][object] = function(cm) { textObjectManipulation(cm, object, false, false, true); };
      CodeMirror.keyMap['vim-prefix-ci'][object] = function(cm) { textObjectManipulation(cm, object, true, true, false); };
      CodeMirror.keyMap['vim-prefix-ca'][object] = function(cm) { textObjectManipulation(cm, object, true, true, true); };
    })(object)
  }
})();