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/admin/jscripts/codemirror/addon/fold/ -> comment-fold.js (source)

   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  CodeMirror.registerGlobalHelper("fold", "comment", function(mode) {
  15    return mode.blockCommentStart && mode.blockCommentEnd;
  16  }, function(cm, start) {
  17    var mode = cm.getModeAt(start), startToken = mode.blockCommentStart, endToken = mode.blockCommentEnd;
  18    if (!startToken || !endToken) return;
  19    var line = start.line, lineText = cm.getLine(line);
  20  
  21    var startCh;
  22    for (var at = start.ch, pass = 0;;) {
  23      var found = at <= 0 ? -1 : lineText.lastIndexOf(startToken, at - 1);
  24      if (found == -1) {
  25        if (pass == 1) return;
  26        pass = 1;
  27        at = lineText.length;
  28        continue;
  29      }
  30      if (pass == 1 && found < start.ch) return;
  31      if (/comment/.test(cm.getTokenTypeAt(CodeMirror.Pos(line, found + 1))) &&
  32          (found == 0 || lineText.slice(found - endToken.length, found) == endToken ||
  33           !/comment/.test(cm.getTokenTypeAt(CodeMirror.Pos(line, found))))) {
  34        startCh = found + startToken.length;
  35        break;
  36      }
  37      at = found - 1;
  38    }
  39  
  40    var depth = 1, lastLine = cm.lastLine(), end, endCh;
  41    outer: for (var i = line; i <= lastLine; ++i) {
  42      var text = cm.getLine(i), pos = i == line ? startCh : 0;
  43      for (;;) {
  44        var nextOpen = text.indexOf(startToken, pos), nextClose = text.indexOf(endToken, pos);
  45        if (nextOpen < 0) nextOpen = text.length;
  46        if (nextClose < 0) nextClose = text.length;
  47        pos = Math.min(nextOpen, nextClose);
  48        if (pos == text.length) break;
  49        if (pos == nextOpen) ++depth;
  50        else if (!--depth) { end = i; endCh = pos; break outer; }
  51        ++pos;
  52      }
  53    }
  54    if (end == null || line == end && endCh == startCh) return;
  55    return {from: CodeMirror.Pos(line, startCh),
  56            to: CodeMirror.Pos(end, endCh)};
  57  });
  58  
  59  });


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