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comment-fold.js
60 lines
| 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 | }); |
| 60 |