third_party/WebKit/Source/devtools/front_end/cm/comment.js

   1 // CodeMirror, copyright (c) by Marijn Haverbeke and others
   2 // Distributed under an MIT license: http://codemirror.net/LICENSE
   3
   4 (function(mod) {
   5   if (typeof exports == "object" && typeof module == "object") // CommonJS
   6     mod(require("../../lib/codemirror"));
   7   else if (typeof define == "function" && define.amd) // AMD
   8     define(["../../lib/codemirror"], mod);
   9   else // Plain browser env
  10     mod(CodeMirror);
  11 })(function(CodeMirror) {
  12   "use strict";
  13
  14   var noOptions = {};
  15   var nonWS = /[^\s\u00a0]/;
  16   var Pos = CodeMirror.Pos;
  17
  18   function firstNonWS(str) {
  19     var found = str.search(nonWS);
  20     return found == -1 ? 0 : found;
  21   }
  22
  23   CodeMirror.commands.toggleComment = function(cm) {
  24     var minLine = Infinity, ranges = cm.listSelections(), mode = null;
  25     for (var i = ranges.length - 1; i >= 0; i--) {
  26       var from = ranges[i].from(), to = ranges[i].to();
  27       if (from.line >= minLine) continue;
  28       if (to.line >= minLine) to = Pos(minLine, 0);
  29       minLine = from.line;
  30       if (mode == null) {
  31         if (cm.uncomment(from, to)) mode = "un";
  32         else { cm.lineComment(from, to); mode = "line"; }
  33       } else if (mode == "un") {
  34         cm.uncomment(from, to);
  35       } else {
  36         cm.lineComment(from, to);
  37       }
  38     }
  39   };
  40
  41   CodeMirror.defineExtension("lineComment", function(from, to, options) {
  42     if (!options) options = noOptions;
  43     var self = this, mode = self.getModeAt(from);
  44     var commentString = options.lineComment || mode.lineComment;
  45     if (!commentString) {
  46       if (options.blockCommentStart || mode.blockCommentStart) {
  47         options.fullLines = true;
  48         self.blockComment(from, to, options);
  49       }
  50       return;
  51     }
  52     var firstLine = self.getLine(from.line);
  53     if (firstLine == null) return;
  54     var end = Math.min(to.ch != 0 || to.line == from.line ? to.line + 1 : to.line, self.lastLine() + 1);
  55     var pad = options.padding == null ? " " : options.padding;
  56     var blankLines = options.commentBlankLines || from.line == to.line;
  57
  58     self.operation(function() {
  59       if (options.indent) {
  60         var baseString = firstLine.slice(0, firstNonWS(firstLine));
  61         for (var i = from.line; i < end; ++i) {
  62           var line = self.getLine(i), cut = baseString.length;
  63           if (!blankLines && !nonWS.test(line)) continue;
  64           if (line.slice(0, cut) != baseString) cut = firstNonWS(line);
  65           self.replaceRange(baseString + commentString + pad, Pos(i, 0), Pos(i, cut));
  66         }
  67       } else {
  68         for (var i = from.line; i < end; ++i) {
  69           if (blankLines || nonWS.test(self.getLine(i)))
  70             self.replaceRange(commentString + pad, Pos(i, 0));
  71         }
  72       }
  73     });
  74   });
  75
  76   CodeMirror.defineExtension("blockComment", function(from, to, options) {
  77     if (!options) options = noOptions;
  78     var self = this, mode = self.getModeAt(from);
  79     var startString = options.blockCommentStart || mode.blockCommentStart;
  80     var endString = options.blockCommentEnd || mode.blockCommentEnd;
  81     if (!startString || !endString) {
  82       if ((options.lineComment || mode.lineComment) && options.fullLines != false)
  83         self.lineComment(from, to, options);
  84       return;
  85     }
  86
  87     var end = Math.min(to.line, self.lastLine());
  88     if (end != from.line && to.ch == 0 && nonWS.test(self.getLine(end))) --end;
  89
  90     var pad = options.padding == null ? " " : options.padding;
  91     if (from.line > end) return;
  92
  93     self.operation(function() {
  94       if (options.fullLines != false) {
  95         var lastLineHasText = nonWS.test(self.getLine(end));
  96         self.replaceRange(pad + endString, Pos(end));
  97         self.replaceRange(startString + pad, Pos(from.line, 0));
  98         var lead = options.blockCommentLead || mode.blockCommentLead;
  99         if (lead != null) for (var i = from.line + 1; i <= end; ++i)
 100           if (i != end || lastLineHasText)
 101             self.replaceRange(lead + pad, Pos(i, 0));
 102       } else {
 103         self.replaceRange(endString, to);
 104         self.replaceRange(startString, from);
 105       }
 106     });
 107   });
 108
 109   CodeMirror.defineExtension("uncomment", function(from, to, options) {
 110     if (!options) options = noOptions;
 111     var self = this, mode = self.getModeAt(from);
 112     var end = Math.min(to.ch != 0 || to.line == from.line ? to.line : to.line - 1, self.lastLine()), start = Math.min(from.line, end);
 113
 114     // Try finding line comments
 115     var lineString = options.lineComment || mode.lineComment, lines = [];
 116     var pad = options.padding == null ? " " : options.padding, didSomething;
 117     lineComment: {
 118       if (!lineString) break lineComment;
 119       for (var i = start; i <= end; ++i) {
 120         var line = self.getLine(i);
 121         var found = line.indexOf(lineString);
 122         if (found > -1 && !/comment/.test(self.getTokenTypeAt(Pos(i, found + 1)))) found = -1;
 123         if (found == -1 && (i != end || i == start) && nonWS.test(line)) break lineComment;
 124         if (found > -1 && nonWS.test(line.slice(0, found))) break lineComment;
 125         lines.push(line);
 126       }
 127       self.operation(function() {
 128         for (var i = start; i <= end; ++i) {
 129           var line = lines[i - start];
 130           var pos = line.indexOf(lineString), endPos = pos + lineString.length;
 131           if (pos < 0) continue;
 132           if (line.slice(endPos, endPos + pad.length) == pad) endPos += pad.length;
 133           didSomething = true;
 134           self.replaceRange("", Pos(i, pos), Pos(i, endPos));
 135         }
 136       });
 137       if (didSomething) return true;
 138     }
 139
 140     // Try block comments
 141     var startString = options.blockCommentStart || mode.blockCommentStart;
 142     var endString = options.blockCommentEnd || mode.blockCommentEnd;
 143     if (!startString || !endString) return false;
 144     var lead = options.blockCommentLead || mode.blockCommentLead;
 145     var startLine = self.getLine(start), endLine = end == start ? startLine : self.getLine(end);
 146     var open = startLine.indexOf(startString), close = endLine.lastIndexOf(endString);
 147     if (close == -1 && start != end) {
 148       endLine = self.getLine(--end);
 149       close = endLine.lastIndexOf(endString);
 150     }
 151     if (open == -1 || close == -1 ||
 152         !/comment/.test(self.getTokenTypeAt(Pos(start, open + 1))) ||
 153         !/comment/.test(self.getTokenTypeAt(Pos(end, close + 1))))
 154       return false;
 155
 156     // Avoid killing block comments completely outside the selection.
 157     // Positions of the last startString before the start of the selection, and the first endString after it.
 158     var lastStart = startLine.lastIndexOf(startString, from.ch);
 159     var firstEnd = lastStart == -1 ? -1 : startLine.slice(0, from.ch).indexOf(endString, lastStart + startString.length);
 160     if (lastStart != -1 && firstEnd != -1 && firstEnd + endString.length != from.ch) return false;
 161     // Positions of the first endString after the end of the selection, and the last startString before it.
 162     firstEnd = endLine.indexOf(endString, to.ch);
 163     var almostLastStart = endLine.slice(to.ch).lastIndexOf(startString, firstEnd - to.ch);
 164     lastStart = (firstEnd == -1 || almostLastStart == -1) ? -1 : to.ch + almostLastStart;
 165     if (firstEnd != -1 && lastStart != -1 && lastStart != to.ch) return false;
 166
 167     self.operation(function() {
 168       self.replaceRange("", Pos(end, close - (pad && endLine.slice(close - pad.length, close) == pad ? pad.length : 0)),
 169                         Pos(end, close + endString.length));
 170       var openEnd = open + startString.length;
 171       if (pad && startLine.slice(openEnd, openEnd + pad.length) == pad) openEnd += pad.length;
 172       self.replaceRange("", Pos(start, open), Pos(start, openEnd));
 173       if (lead) for (var i = start + 1; i <= end; ++i) {
 174         var line = self.getLine(i), found = line.indexOf(lead);
 175         if (found == -1 || nonWS.test(line.slice(0, found))) continue;
 176         var foundEnd = found + lead.length;
 177         if (pad && line.slice(foundEnd, foundEnd + pad.length) == pad) foundEnd += pad.length;
 178         self.replaceRange("", Pos(i, found), Pos(i, foundEnd));
 179       }
 180     });
 181     return true;
 182   });
 183 });