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1 // CodeMirror, copyright (c) by Marijn Haverbeke and others
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2 // Distributed under an MIT license: https://codemirror.net/5/LICENSE
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3
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4 (function(mod) {
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5 if (typeof exports == "object" && typeof module == "object") // CommonJS
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6 mod(require("../../lib/codemirror"));
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7 else if (typeof define == "function" && define.amd) // AMD
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8 define(["../../lib/codemirror"], mod);
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9 else // Plain browser env
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10 mod(CodeMirror);
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11 })(function(CodeMirror) {
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12 "use strict";
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13
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14 CodeMirror.registerGlobalHelper("fold", "comment", function(mode) {
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15 return mode.blockCommentStart && mode.blockCommentEnd;
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16 }, function(cm, start) {
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17 var mode = cm.getModeAt(start), startToken = mode.blockCommentStart, endToken = mode.blockCommentEnd;
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18 if (!startToken || !endToken) return;
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19 var line = start.line, lineText = cm.getLine(line);
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20
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21 var startCh;
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22 for (var at = start.ch, pass = 0;;) {
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23 var found = at <= 0 ? -1 : lineText.lastIndexOf(startToken, at - 1);
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24 if (found == -1) {
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25 if (pass == 1) return;
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26 pass = 1;
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27 at = lineText.length;
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28 continue;
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29 }
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30 if (pass == 1 && found < start.ch) return;
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31 if (/comment/.test(cm.getTokenTypeAt(CodeMirror.Pos(line, found + 1))) &&
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32 (found == 0 || lineText.slice(found - endToken.length, found) == endToken ||
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33 !/comment/.test(cm.getTokenTypeAt(CodeMirror.Pos(line, found))))) {
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34 startCh = found + startToken.length;
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35 break;
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36 }
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37 at = found - 1;
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38 }
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39
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40 var depth = 1, lastLine = cm.lastLine(), end, endCh;
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41 outer: for (var i = line; i <= lastLine; ++i) {
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42 var text = cm.getLine(i), pos = i == line ? startCh : 0;
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43 for (;;) {
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44 var nextOpen = text.indexOf(startToken, pos), nextClose = text.indexOf(endToken, pos);
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45 if (nextOpen < 0) nextOpen = text.length;
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46 if (nextClose < 0) nextClose = text.length;
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47 pos = Math.min(nextOpen, nextClose);
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48 if (pos == text.length) break;
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49 if (pos == nextOpen) ++depth;
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50 else if (!--depth) { end = i; endCh = pos; break outer; }
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51 ++pos;
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52 }
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53 }
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54 if (end == null || line == end && endCh == startCh) return;
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55 return {from: CodeMirror.Pos(line, startCh),
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56 to: CodeMirror.Pos(end, endCh)};
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57 });
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58
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59 });
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