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   1  // CodeMirror, copyright (c) by Marijn Haverbeke and others
   2  // Distributed under an MIT license: https://codemirror.net/5/LICENSE
   3  
   4  // A rough approximation of Sublime Text's keybindings
   5  // Depends on addon/search/searchcursor.js and optionally addon/dialog/dialogs.js
   6  
   7  (function(mod) {
   8    if (typeof exports == "object" && typeof module == "object") // CommonJS
   9      mod(require("../lib/codemirror"), require("../addon/search/searchcursor"), require("../addon/edit/matchbrackets"));
  10    else if (typeof define == "function" && define.amd) // AMD
  11      define(["../lib/codemirror", "../addon/search/searchcursor", "../addon/edit/matchbrackets"], mod);
  12    else // Plain browser env
  13      mod(CodeMirror);
  14  })(function(CodeMirror) {
  15    "use strict";
  16  
  17    var cmds = CodeMirror.commands;
  18    var Pos = CodeMirror.Pos;
  19  
  20    // This is not exactly Sublime's algorithm. I couldn't make heads or tails of that.
  21    function findPosSubword(doc, start, dir) {
  22      if (dir < 0 && start.ch == 0) return doc.clipPos(Pos(start.line - 1));
  23      var line = doc.getLine(start.line);
  24      if (dir > 0 && start.ch >= line.length) return doc.clipPos(Pos(start.line + 1, 0));
  25      var state = "start", type, startPos = start.ch;
  26      for (var pos = startPos, e = dir < 0 ? 0 : line.length, i = 0; pos != e; pos += dir, i++) {
  27        var next = line.charAt(dir < 0 ? pos - 1 : pos);
  28        var cat = next != "_" && CodeMirror.isWordChar(next) ? "w" : "o";
  29        if (cat == "w" && next.toUpperCase() == next) cat = "W";
  30        if (state == "start") {
  31          if (cat != "o") { state = "in"; type = cat; }
  32          else startPos = pos + dir
  33        } else if (state == "in") {
  34          if (type != cat) {
  35            if (type == "w" && cat == "W" && dir < 0) pos--;
  36            if (type == "W" && cat == "w" && dir > 0) { // From uppercase to lowercase
  37              if (pos == startPos + 1) { type = "w"; continue; }
  38              else pos--;
  39            }
  40            break;
  41          }
  42        }
  43      }
  44      return Pos(start.line, pos);
  45    }
  46  
  47    function moveSubword(cm, dir) {
  48      cm.extendSelectionsBy(function(range) {
  49        if (cm.display.shift || cm.doc.extend || range.empty())
  50          return findPosSubword(cm.doc, range.head, dir);
  51        else
  52          return dir < 0 ? range.from() : range.to();
  53      });
  54    }
  55  
  56    cmds.goSubwordLeft = function(cm) { moveSubword(cm, -1); };
  57    cmds.goSubwordRight = function(cm) { moveSubword(cm, 1); };
  58  
  59    cmds.scrollLineUp = function(cm) {
  60      var info = cm.getScrollInfo();
  61      if (!cm.somethingSelected()) {
  62        var visibleBottomLine = cm.lineAtHeight(info.top + info.clientHeight, "local");
  63        if (cm.getCursor().line >= visibleBottomLine)
  64          cm.execCommand("goLineUp");
  65      }
  66      cm.scrollTo(null, info.top - cm.defaultTextHeight());
  67    };
  68    cmds.scrollLineDown = function(cm) {
  69      var info = cm.getScrollInfo();
  70      if (!cm.somethingSelected()) {
  71        var visibleTopLine = cm.lineAtHeight(info.top, "local")+1;
  72        if (cm.getCursor().line <= visibleTopLine)
  73          cm.execCommand("goLineDown");
  74      }
  75      cm.scrollTo(null, info.top + cm.defaultTextHeight());
  76    };
  77  
  78    cmds.splitSelectionByLine = function(cm) {
  79      var ranges = cm.listSelections(), lineRanges = [];
  80      for (var i = 0; i < ranges.length; i++) {
  81        var from = ranges[i].from(), to = ranges[i].to();
  82        for (var line = from.line; line <= to.line; ++line)
  83          if (!(to.line > from.line && line == to.line && to.ch == 0))
  84            lineRanges.push({anchor: line == from.line ? from : Pos(line, 0),
  85                             head: line == to.line ? to : Pos(line)});
  86      }
  87      cm.setSelections(lineRanges, 0);
  88    };
  89  
  90    cmds.singleSelectionTop = function(cm) {
  91      var range = cm.listSelections()[0];
  92      cm.setSelection(range.anchor, range.head, {scroll: false});
  93    };
  94  
  95    cmds.selectLine = function(cm) {
  96      var ranges = cm.listSelections(), extended = [];
  97      for (var i = 0; i < ranges.length; i++) {
  98        var range = ranges[i];
  99        extended.push({anchor: Pos(range.from().line, 0),
 100                       head: Pos(range.to().line + 1, 0)});
 101      }
 102      cm.setSelections(extended);
 103    };
 104  
 105    function insertLine(cm, above) {
 106      if (cm.isReadOnly()) return CodeMirror.Pass
 107      cm.operation(function() {
 108        var len = cm.listSelections().length, newSelection = [], last = -1;
 109        for (var i = 0; i < len; i++) {
 110          var head = cm.listSelections()[i].head;
 111          if (head.line <= last) continue;
 112          var at = Pos(head.line + (above ? 0 : 1), 0);
 113          cm.replaceRange("\n", at, null, "+insertLine");
 114          cm.indentLine(at.line, null, true);
 115          newSelection.push({head: at, anchor: at});
 116          last = head.line + 1;
 117        }
 118        cm.setSelections(newSelection);
 119      });
 120      cm.execCommand("indentAuto");
 121    }
 122  
 123    cmds.insertLineAfter = function(cm) { return insertLine(cm, false); };
 124  
 125    cmds.insertLineBefore = function(cm) { return insertLine(cm, true); };
 126  
 127    function wordAt(cm, pos) {
 128      var start = pos.ch, end = start, line = cm.getLine(pos.line);
 129      while (start && CodeMirror.isWordChar(line.charAt(start - 1))) --start;
 130      while (end < line.length && CodeMirror.isWordChar(line.charAt(end))) ++end;
 131      return {from: Pos(pos.line, start), to: Pos(pos.line, end), word: line.slice(start, end)};
 132    }
 133  
 134    cmds.selectNextOccurrence = function(cm) {
 135      var from = cm.getCursor("from"), to = cm.getCursor("to");
 136      var fullWord = cm.state.sublimeFindFullWord == cm.doc.sel;
 137      if (CodeMirror.cmpPos(from, to) == 0) {
 138        var word = wordAt(cm, from);
 139        if (!word.word) return;
 140        cm.setSelection(word.from, word.to);
 141        fullWord = true;
 142      } else {
 143        var text = cm.getRange(from, to);
 144        var query = fullWord ? new RegExp("\\b" + text + "\\b") : text;
 145        var cur = cm.getSearchCursor(query, to);
 146        var found = cur.findNext();
 147        if (!found) {
 148          cur = cm.getSearchCursor(query, Pos(cm.firstLine(), 0));
 149          found = cur.findNext();
 150        }
 151        if (!found || isSelectedRange(cm.listSelections(), cur.from(), cur.to())) return
 152        cm.addSelection(cur.from(), cur.to());
 153      }
 154      if (fullWord)
 155        cm.state.sublimeFindFullWord = cm.doc.sel;
 156    };
 157  
 158    cmds.skipAndSelectNextOccurrence = function(cm) {
 159      var prevAnchor = cm.getCursor("anchor"), prevHead = cm.getCursor("head");
 160      cmds.selectNextOccurrence(cm);
 161      if (CodeMirror.cmpPos(prevAnchor, prevHead) != 0) {
 162        cm.doc.setSelections(cm.doc.listSelections()
 163            .filter(function (sel) {
 164              return sel.anchor != prevAnchor || sel.head != prevHead;
 165            }));
 166      }
 167    }
 168  
 169    function addCursorToSelection(cm, dir) {
 170      var ranges = cm.listSelections(), newRanges = [];
 171      for (var i = 0; i < ranges.length; i++) {
 172        var range = ranges[i];
 173        var newAnchor = cm.findPosV(
 174            range.anchor, dir, "line", range.anchor.goalColumn);
 175        var newHead = cm.findPosV(
 176            range.head, dir, "line", range.head.goalColumn);
 177        newAnchor.goalColumn = range.anchor.goalColumn != null ?
 178            range.anchor.goalColumn : cm.cursorCoords(range.anchor, "div").left;
 179        newHead.goalColumn = range.head.goalColumn != null ?
 180            range.head.goalColumn : cm.cursorCoords(range.head, "div").left;
 181        var newRange = {anchor: newAnchor, head: newHead};
 182        newRanges.push(range);
 183        newRanges.push(newRange);
 184      }
 185      cm.setSelections(newRanges);
 186    }
 187    cmds.addCursorToPrevLine = function(cm) { addCursorToSelection(cm, -1); };
 188    cmds.addCursorToNextLine = function(cm) { addCursorToSelection(cm, 1); };
 189  
 190    function isSelectedRange(ranges, from, to) {
 191      for (var i = 0; i < ranges.length; i++)
 192        if (CodeMirror.cmpPos(ranges[i].from(), from) == 0 &&
 193            CodeMirror.cmpPos(ranges[i].to(), to) == 0) return true
 194      return false
 195    }
 196  
 197    var mirror = "(){}[]";
 198    function selectBetweenBrackets(cm) {
 199      var ranges = cm.listSelections(), newRanges = []
 200      for (var i = 0; i < ranges.length; i++) {
 201        var range = ranges[i], pos = range.head, opening = cm.scanForBracket(pos, -1);
 202        if (!opening) return false;
 203        for (;;) {
 204          var closing = cm.scanForBracket(pos, 1);
 205          if (!closing) return false;
 206          if (closing.ch == mirror.charAt(mirror.indexOf(opening.ch) + 1)) {
 207            var startPos = Pos(opening.pos.line, opening.pos.ch + 1);
 208            if (CodeMirror.cmpPos(startPos, range.from()) == 0 &&
 209                CodeMirror.cmpPos(closing.pos, range.to()) == 0) {
 210              opening = cm.scanForBracket(opening.pos, -1);
 211              if (!opening) return false;
 212            } else {
 213              newRanges.push({anchor: startPos, head: closing.pos});
 214              break;
 215            }
 216          }
 217          pos = Pos(closing.pos.line, closing.pos.ch + 1);
 218        }
 219      }
 220      cm.setSelections(newRanges);
 221      return true;
 222    }
 223  
 224    cmds.selectScope = function(cm) {
 225      selectBetweenBrackets(cm) || cm.execCommand("selectAll");
 226    };
 227    cmds.selectBetweenBrackets = function(cm) {
 228      if (!selectBetweenBrackets(cm)) return CodeMirror.Pass;
 229    };
 230  
 231    function puncType(type) {
 232      return !type ? null : /\bpunctuation\b/.test(type) ? type : undefined
 233    }
 234  
 235    cmds.goToBracket = function(cm) {
 236      cm.extendSelectionsBy(function(range) {
 237        var next = cm.scanForBracket(range.head, 1, puncType(cm.getTokenTypeAt(range.head)));
 238        if (next && CodeMirror.cmpPos(next.pos, range.head) != 0) return next.pos;
 239        var prev = cm.scanForBracket(range.head, -1, puncType(cm.getTokenTypeAt(Pos(range.head.line, range.head.ch + 1))));
 240        return prev && Pos(prev.pos.line, prev.pos.ch + 1) || range.head;
 241      });
 242    };
 243  
 244    cmds.swapLineUp = function(cm) {
 245      if (cm.isReadOnly()) return CodeMirror.Pass
 246      var ranges = cm.listSelections(), linesToMove = [], at = cm.firstLine() - 1, newSels = [];
 247      for (var i = 0; i < ranges.length; i++) {
 248        var range = ranges[i], from = range.from().line - 1, to = range.to().line;
 249        newSels.push({anchor: Pos(range.anchor.line - 1, range.anchor.ch),
 250                      head: Pos(range.head.line - 1, range.head.ch)});
 251        if (range.to().ch == 0 && !range.empty()) --to;
 252        if (from > at) linesToMove.push(from, to);
 253        else if (linesToMove.length) linesToMove[linesToMove.length - 1] = to;
 254        at = to;
 255      }
 256      cm.operation(function() {
 257        for (var i = 0; i < linesToMove.length; i += 2) {
 258          var from = linesToMove[i], to = linesToMove[i + 1];
 259          var line = cm.getLine(from);
 260          cm.replaceRange("", Pos(from, 0), Pos(from + 1, 0), "+swapLine");
 261          if (to > cm.lastLine())
 262            cm.replaceRange("\n" + line, Pos(cm.lastLine()), null, "+swapLine");
 263          else
 264            cm.replaceRange(line + "\n", Pos(to, 0), null, "+swapLine");
 265        }
 266        cm.setSelections(newSels);
 267        cm.scrollIntoView();
 268      });
 269    };
 270  
 271    cmds.swapLineDown = function(cm) {
 272      if (cm.isReadOnly()) return CodeMirror.Pass
 273      var ranges = cm.listSelections(), linesToMove = [], at = cm.lastLine() + 1;
 274      for (var i = ranges.length - 1; i >= 0; i--) {
 275        var range = ranges[i], from = range.to().line + 1, to = range.from().line;
 276        if (range.to().ch == 0 && !range.empty()) from--;
 277        if (from < at) linesToMove.push(from, to);
 278        else if (linesToMove.length) linesToMove[linesToMove.length - 1] = to;
 279        at = to;
 280      }
 281      cm.operation(function() {
 282        for (var i = linesToMove.length - 2; i >= 0; i -= 2) {
 283          var from = linesToMove[i], to = linesToMove[i + 1];
 284          var line = cm.getLine(from);
 285          if (from == cm.lastLine())
 286            cm.replaceRange("", Pos(from - 1), Pos(from), "+swapLine");
 287          else
 288            cm.replaceRange("", Pos(from, 0), Pos(from + 1, 0), "+swapLine");
 289          cm.replaceRange(line + "\n", Pos(to, 0), null, "+swapLine");
 290        }
 291        cm.scrollIntoView();
 292      });
 293    };
 294  
 295    cmds.toggleCommentIndented = function(cm) {
 296      cm.toggleComment({ indent: true });
 297    }
 298  
 299    cmds.joinLines = function(cm) {
 300      var ranges = cm.listSelections(), joined = [];
 301      for (var i = 0; i < ranges.length; i++) {
 302        var range = ranges[i], from = range.from();
 303        var start = from.line, end = range.to().line;
 304        while (i < ranges.length - 1 && ranges[i + 1].from().line == end)
 305          end = ranges[++i].to().line;
 306        joined.push({start: start, end: end, anchor: !range.empty() && from});
 307      }
 308      cm.operation(function() {
 309        var offset = 0, ranges = [];
 310        for (var i = 0; i < joined.length; i++) {
 311          var obj = joined[i];
 312          var anchor = obj.anchor && Pos(obj.anchor.line - offset, obj.anchor.ch), head;
 313          for (var line = obj.start; line <= obj.end; line++) {
 314            var actual = line - offset;
 315            if (line == obj.end) head = Pos(actual, cm.getLine(actual).length + 1);
 316            if (actual < cm.lastLine()) {
 317              cm.replaceRange(" ", Pos(actual), Pos(actual + 1, /^\s*/.exec(cm.getLine(actual + 1))[0].length));
 318              ++offset;
 319            }
 320          }
 321          ranges.push({anchor: anchor || head, head: head});
 322        }
 323        cm.setSelections(ranges, 0);
 324      });
 325    };
 326  
 327    cmds.duplicateLine = function(cm) {
 328      cm.operation(function() {
 329        var rangeCount = cm.listSelections().length;
 330        for (var i = 0; i < rangeCount; i++) {
 331          var range = cm.listSelections()[i];
 332          if (range.empty())
 333            cm.replaceRange(cm.getLine(range.head.line) + "\n", Pos(range.head.line, 0));
 334          else
 335            cm.replaceRange(cm.getRange(range.from(), range.to()), range.from());
 336        }
 337        cm.scrollIntoView();
 338      });
 339    };
 340  
 341  
 342    function sortLines(cm, caseSensitive, direction) {
 343      if (cm.isReadOnly()) return CodeMirror.Pass
 344      var ranges = cm.listSelections(), toSort = [], selected;
 345      for (var i = 0; i < ranges.length; i++) {
 346        var range = ranges[i];
 347        if (range.empty()) continue;
 348        var from = range.from().line, to = range.to().line;
 349        while (i < ranges.length - 1 && ranges[i + 1].from().line == to)
 350          to = ranges[++i].to().line;
 351        if (!ranges[i].to().ch) to--;
 352        toSort.push(from, to);
 353      }
 354      if (toSort.length) selected = true;
 355      else toSort.push(cm.firstLine(), cm.lastLine());
 356  
 357      cm.operation(function() {
 358        var ranges = [];
 359        for (var i = 0; i < toSort.length; i += 2) {
 360          var from = toSort[i], to = toSort[i + 1];
 361          var start = Pos(from, 0), end = Pos(to);
 362          var lines = cm.getRange(start, end, false);
 363          if (caseSensitive)
 364            lines.sort(function(a, b) { return a < b ? -direction : a == b ? 0 : direction; });
 365          else
 366            lines.sort(function(a, b) {
 367              var au = a.toUpperCase(), bu = b.toUpperCase();
 368              if (au != bu) { a = au; b = bu; }
 369              return a < b ? -direction : a == b ? 0 : direction;
 370            });
 371          cm.replaceRange(lines, start, end);
 372          if (selected) ranges.push({anchor: start, head: Pos(to + 1, 0)});
 373        }
 374        if (selected) cm.setSelections(ranges, 0);
 375      });
 376    }
 377  
 378    cmds.sortLines = function(cm) { sortLines(cm, true, 1); };
 379    cmds.reverseSortLines = function(cm) { sortLines(cm, true, -1); };
 380    cmds.sortLinesInsensitive = function(cm) { sortLines(cm, false, 1); };
 381    cmds.reverseSortLinesInsensitive = function(cm) { sortLines(cm, false, -1); };
 382  
 383    cmds.nextBookmark = function(cm) {
 384      var marks = cm.state.sublimeBookmarks;
 385      if (marks) while (marks.length) {
 386        var current = marks.shift();
 387        var found = current.find();
 388        if (found) {
 389          marks.push(current);
 390          return cm.setSelection(found.from, found.to);
 391        }
 392      }
 393    };
 394  
 395    cmds.prevBookmark = function(cm) {
 396      var marks = cm.state.sublimeBookmarks;
 397      if (marks) while (marks.length) {
 398        marks.unshift(marks.pop());
 399        var found = marks[marks.length - 1].find();
 400        if (!found)
 401          marks.pop();
 402        else
 403          return cm.setSelection(found.from, found.to);
 404      }
 405    };
 406  
 407    cmds.toggleBookmark = function(cm) {
 408      var ranges = cm.listSelections();
 409      var marks = cm.state.sublimeBookmarks || (cm.state.sublimeBookmarks = []);
 410      for (var i = 0; i < ranges.length; i++) {
 411        var from = ranges[i].from(), to = ranges[i].to();
 412        var found = ranges[i].empty() ? cm.findMarksAt(from) : cm.findMarks(from, to);
 413        for (var j = 0; j < found.length; j++) {
 414          if (found[j].sublimeBookmark) {
 415            found[j].clear();
 416            for (var k = 0; k < marks.length; k++)
 417              if (marks[k] == found[j])
 418                marks.splice(k--, 1);
 419            break;
 420          }
 421        }
 422        if (j == found.length)
 423          marks.push(cm.markText(from, to, {sublimeBookmark: true, clearWhenEmpty: false}));
 424      }
 425    };
 426  
 427    cmds.clearBookmarks = function(cm) {
 428      var marks = cm.state.sublimeBookmarks;
 429      if (marks) for (var i = 0; i < marks.length; i++) marks[i].clear();
 430      marks.length = 0;
 431    };
 432  
 433    cmds.selectBookmarks = function(cm) {
 434      var marks = cm.state.sublimeBookmarks, ranges = [];
 435      if (marks) for (var i = 0; i < marks.length; i++) {
 436        var found = marks[i].find();
 437        if (!found)
 438          marks.splice(i--, 0);
 439        else
 440          ranges.push({anchor: found.from, head: found.to});
 441      }
 442      if (ranges.length)
 443        cm.setSelections(ranges, 0);
 444    };
 445  
 446    function modifyWordOrSelection(cm, mod) {
 447      cm.operation(function() {
 448        var ranges = cm.listSelections(), indices = [], replacements = [];
 449        for (var i = 0; i < ranges.length; i++) {
 450          var range = ranges[i];
 451          if (range.empty()) { indices.push(i); replacements.push(""); }
 452          else replacements.push(mod(cm.getRange(range.from(), range.to())));
 453        }
 454        cm.replaceSelections(replacements, "around", "case");
 455        for (var i = indices.length - 1, at; i >= 0; i--) {
 456          var range = ranges[indices[i]];
 457          if (at && CodeMirror.cmpPos(range.head, at) > 0) continue;
 458          var word = wordAt(cm, range.head);
 459          at = word.from;
 460          cm.replaceRange(mod(word.word), word.from, word.to);
 461        }
 462      });
 463    }
 464  
 465    cmds.smartBackspace = function(cm) {
 466      if (cm.somethingSelected()) return CodeMirror.Pass;
 467  
 468      cm.operation(function() {
 469        var cursors = cm.listSelections();
 470        var indentUnit = cm.getOption("indentUnit");
 471  
 472        for (var i = cursors.length - 1; i >= 0; i--) {
 473          var cursor = cursors[i].head;
 474          var toStartOfLine = cm.getRange({line: cursor.line, ch: 0}, cursor);
 475          var column = CodeMirror.countColumn(toStartOfLine, null, cm.getOption("tabSize"));
 476  
 477          // Delete by one character by default
 478          var deletePos = cm.findPosH(cursor, -1, "char", false);
 479  
 480          if (toStartOfLine && !/\S/.test(toStartOfLine) && column % indentUnit == 0) {
 481            var prevIndent = new Pos(cursor.line,
 482              CodeMirror.findColumn(toStartOfLine, column - indentUnit, indentUnit));
 483  
 484            // Smart delete only if we found a valid prevIndent location
 485            if (prevIndent.ch != cursor.ch) deletePos = prevIndent;
 486          }
 487  
 488          cm.replaceRange("", deletePos, cursor, "+delete");
 489        }
 490      });
 491    };
 492  
 493    cmds.delLineRight = function(cm) {
 494      cm.operation(function() {
 495        var ranges = cm.listSelections();
 496        for (var i = ranges.length - 1; i >= 0; i--)
 497          cm.replaceRange("", ranges[i].anchor, Pos(ranges[i].to().line), "+delete");
 498        cm.scrollIntoView();
 499      });
 500    };
 501  
 502    cmds.upcaseAtCursor = function(cm) {
 503      modifyWordOrSelection(cm, function(str) { return str.toUpperCase(); });
 504    };
 505    cmds.downcaseAtCursor = function(cm) {
 506      modifyWordOrSelection(cm, function(str) { return str.toLowerCase(); });
 507    };
 508  
 509    cmds.setSublimeMark = function(cm) {
 510      if (cm.state.sublimeMark) cm.state.sublimeMark.clear();
 511      cm.state.sublimeMark = cm.setBookmark(cm.getCursor());
 512    };
 513    cmds.selectToSublimeMark = function(cm) {
 514      var found = cm.state.sublimeMark && cm.state.sublimeMark.find();
 515      if (found) cm.setSelection(cm.getCursor(), found);
 516    };
 517    cmds.deleteToSublimeMark = function(cm) {
 518      var found = cm.state.sublimeMark && cm.state.sublimeMark.find();
 519      if (found) {
 520        var from = cm.getCursor(), to = found;
 521        if (CodeMirror.cmpPos(from, to) > 0) { var tmp = to; to = from; from = tmp; }
 522        cm.state.sublimeKilled = cm.getRange(from, to);
 523        cm.replaceRange("", from, to);
 524      }
 525    };
 526    cmds.swapWithSublimeMark = function(cm) {
 527      var found = cm.state.sublimeMark && cm.state.sublimeMark.find();
 528      if (found) {
 529        cm.state.sublimeMark.clear();
 530        cm.state.sublimeMark = cm.setBookmark(cm.getCursor());
 531        cm.setCursor(found);
 532      }
 533    };
 534    cmds.sublimeYank = function(cm) {
 535      if (cm.state.sublimeKilled != null)
 536        cm.replaceSelection(cm.state.sublimeKilled, null, "paste");
 537    };
 538  
 539    cmds.showInCenter = function(cm) {
 540      var pos = cm.cursorCoords(null, "local");
 541      cm.scrollTo(null, (pos.top + pos.bottom) / 2 - cm.getScrollInfo().clientHeight / 2);
 542    };
 543  
 544    function getTarget(cm) {
 545      var from = cm.getCursor("from"), to = cm.getCursor("to");
 546      if (CodeMirror.cmpPos(from, to) == 0) {
 547        var word = wordAt(cm, from);
 548        if (!word.word) return;
 549        from = word.from;
 550        to = word.to;
 551      }
 552      return {from: from, to: to, query: cm.getRange(from, to), word: word};
 553    }
 554  
 555    function findAndGoTo(cm, forward) {
 556      var target = getTarget(cm);
 557      if (!target) return;
 558      var query = target.query;
 559      var cur = cm.getSearchCursor(query, forward ? target.to : target.from);
 560  
 561      if (forward ? cur.findNext() : cur.findPrevious()) {
 562        cm.setSelection(cur.from(), cur.to());
 563      } else {
 564        cur = cm.getSearchCursor(query, forward ? Pos(cm.firstLine(), 0)
 565                                                : cm.clipPos(Pos(cm.lastLine())));
 566        if (forward ? cur.findNext() : cur.findPrevious())
 567          cm.setSelection(cur.from(), cur.to());
 568        else if (target.word)
 569          cm.setSelection(target.from, target.to);
 570      }
 571    };
 572    cmds.findUnder = function(cm) { findAndGoTo(cm, true); };
 573    cmds.findUnderPrevious = function(cm) { findAndGoTo(cm,false); };
 574    cmds.findAllUnder = function(cm) {
 575      var target = getTarget(cm);
 576      if (!target) return;
 577      var cur = cm.getSearchCursor(target.query);
 578      var matches = [];
 579      var primaryIndex = -1;
 580      while (cur.findNext()) {
 581        matches.push({anchor: cur.from(), head: cur.to()});
 582        if (cur.from().line <= target.from.line && cur.from().ch <= target.from.ch)
 583          primaryIndex++;
 584      }
 585      cm.setSelections(matches, primaryIndex);
 586    };
 587  
 588  
 589    var keyMap = CodeMirror.keyMap;
 590    keyMap.macSublime = {
 591      "Cmd-Left": "goLineStartSmart",
 592      "Shift-Tab": "indentLess",
 593      "Shift-Ctrl-K": "deleteLine",
 594      "Alt-Q": "wrapLines",
 595      "Ctrl-Left": "goSubwordLeft",
 596      "Ctrl-Right": "goSubwordRight",
 597      "Ctrl-Alt-Up": "scrollLineUp",
 598      "Ctrl-Alt-Down": "scrollLineDown",
 599      "Cmd-L": "selectLine",
 600      "Shift-Cmd-L": "splitSelectionByLine",
 601      "Esc": "singleSelectionTop",
 602      "Cmd-Enter": "insertLineAfter",
 603      "Shift-Cmd-Enter": "insertLineBefore",
 604      "Cmd-D": "selectNextOccurrence",
 605      "Shift-Cmd-Space": "selectScope",
 606      "Shift-Cmd-M": "selectBetweenBrackets",
 607      "Cmd-M": "goToBracket",
 608      "Cmd-Ctrl-Up": "swapLineUp",
 609      "Cmd-Ctrl-Down": "swapLineDown",
 610      "Cmd-/": "toggleCommentIndented",
 611      "Cmd-J": "joinLines",
 612      "Shift-Cmd-D": "duplicateLine",
 613      "F5": "sortLines",
 614      "Shift-F5": "reverseSortLines",
 615      "Cmd-F5": "sortLinesInsensitive",
 616      "Shift-Cmd-F5": "reverseSortLinesInsensitive",
 617      "F2": "nextBookmark",
 618      "Shift-F2": "prevBookmark",
 619      "Cmd-F2": "toggleBookmark",
 620      "Shift-Cmd-F2": "clearBookmarks",
 621      "Alt-F2": "selectBookmarks",
 622      "Backspace": "smartBackspace",
 623      "Cmd-K Cmd-D": "skipAndSelectNextOccurrence",
 624      "Cmd-K Cmd-K": "delLineRight",
 625      "Cmd-K Cmd-U": "upcaseAtCursor",
 626      "Cmd-K Cmd-L": "downcaseAtCursor",
 627      "Cmd-K Cmd-Space": "setSublimeMark",
 628      "Cmd-K Cmd-A": "selectToSublimeMark",
 629      "Cmd-K Cmd-W": "deleteToSublimeMark",
 630      "Cmd-K Cmd-X": "swapWithSublimeMark",
 631      "Cmd-K Cmd-Y": "sublimeYank",
 632      "Cmd-K Cmd-C": "showInCenter",
 633      "Cmd-K Cmd-G": "clearBookmarks",
 634      "Cmd-K Cmd-Backspace": "delLineLeft",
 635      "Cmd-K Cmd-1": "foldAll",
 636      "Cmd-K Cmd-0": "unfoldAll",
 637      "Cmd-K Cmd-J": "unfoldAll",
 638      "Ctrl-Shift-Up": "addCursorToPrevLine",
 639      "Ctrl-Shift-Down": "addCursorToNextLine",
 640      "Cmd-F3": "findUnder",
 641      "Shift-Cmd-F3": "findUnderPrevious",
 642      "Alt-F3": "findAllUnder",
 643      "Shift-Cmd-[": "fold",
 644      "Shift-Cmd-]": "unfold",
 645      "Cmd-I": "findIncremental",
 646      "Shift-Cmd-I": "findIncrementalReverse",
 647      "Cmd-H": "replace",
 648      "F3": "findNext",
 649      "Shift-F3": "findPrev",
 650      "fallthrough": "macDefault"
 651    };
 652    CodeMirror.normalizeKeyMap(keyMap.macSublime);
 653  
 654    keyMap.pcSublime = {
 655      "Shift-Tab": "indentLess",
 656      "Shift-Ctrl-K": "deleteLine",
 657      "Alt-Q": "wrapLines",
 658      "Ctrl-T": "transposeChars",
 659      "Alt-Left": "goSubwordLeft",
 660      "Alt-Right": "goSubwordRight",
 661      "Ctrl-Up": "scrollLineUp",
 662      "Ctrl-Down": "scrollLineDown",
 663      "Ctrl-L": "selectLine",
 664      "Shift-Ctrl-L": "splitSelectionByLine",
 665      "Esc": "singleSelectionTop",
 666      "Ctrl-Enter": "insertLineAfter",
 667      "Shift-Ctrl-Enter": "insertLineBefore",
 668      "Ctrl-D": "selectNextOccurrence",
 669      "Shift-Ctrl-Space": "selectScope",
 670      "Shift-Ctrl-M": "selectBetweenBrackets",
 671      "Ctrl-M": "goToBracket",
 672      "Shift-Ctrl-Up": "swapLineUp",
 673      "Shift-Ctrl-Down": "swapLineDown",
 674      "Ctrl-/": "toggleCommentIndented",
 675      "Ctrl-J": "joinLines",
 676      "Shift-Ctrl-D": "duplicateLine",
 677      "F9": "sortLines",
 678      "Shift-F9": "reverseSortLines",
 679      "Ctrl-F9": "sortLinesInsensitive",
 680      "Shift-Ctrl-F9": "reverseSortLinesInsensitive",
 681      "F2": "nextBookmark",
 682      "Shift-F2": "prevBookmark",
 683      "Ctrl-F2": "toggleBookmark",
 684      "Shift-Ctrl-F2": "clearBookmarks",
 685      "Alt-F2": "selectBookmarks",
 686      "Backspace": "smartBackspace",
 687      "Ctrl-K Ctrl-D": "skipAndSelectNextOccurrence",
 688      "Ctrl-K Ctrl-K": "delLineRight",
 689      "Ctrl-K Ctrl-U": "upcaseAtCursor",
 690      "Ctrl-K Ctrl-L": "downcaseAtCursor",
 691      "Ctrl-K Ctrl-Space": "setSublimeMark",
 692      "Ctrl-K Ctrl-A": "selectToSublimeMark",
 693      "Ctrl-K Ctrl-W": "deleteToSublimeMark",
 694      "Ctrl-K Ctrl-X": "swapWithSublimeMark",
 695      "Ctrl-K Ctrl-Y": "sublimeYank",
 696      "Ctrl-K Ctrl-C": "showInCenter",
 697      "Ctrl-K Ctrl-G": "clearBookmarks",
 698      "Ctrl-K Ctrl-Backspace": "delLineLeft",
 699      "Ctrl-K Ctrl-1": "foldAll",
 700      "Ctrl-K Ctrl-0": "unfoldAll",
 701      "Ctrl-K Ctrl-J": "unfoldAll",
 702      "Ctrl-Alt-Up": "addCursorToPrevLine",
 703      "Ctrl-Alt-Down": "addCursorToNextLine",
 704      "Ctrl-F3": "findUnder",
 705      "Shift-Ctrl-F3": "findUnderPrevious",
 706      "Alt-F3": "findAllUnder",
 707      "Shift-Ctrl-[": "fold",
 708      "Shift-Ctrl-]": "unfold",
 709      "Ctrl-I": "findIncremental",
 710      "Shift-Ctrl-I": "findIncrementalReverse",
 711      "Ctrl-H": "replace",
 712      "F3": "findNext",
 713      "Shift-F3": "findPrev",
 714      "fallthrough": "pcDefault"
 715    };
 716    CodeMirror.normalizeKeyMap(keyMap.pcSublime);
 717  
 718    var mac = keyMap.default == keyMap.macDefault;
 719    keyMap.sublime = mac ? keyMap.macSublime : keyMap.pcSublime;
 720  });