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markdown-fold.js
50 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.registerHelper("fold", "markdown", function(cm, start) { |
| 15 | var maxDepth = 100; |
| 16 | |
| 17 | function isHeader(lineNo) { |
| 18 | var tokentype = cm.getTokenTypeAt(CodeMirror.Pos(lineNo, 0)); |
| 19 | return tokentype && /\bheader\b/.test(tokentype); |
| 20 | } |
| 21 | |
| 22 | function headerLevel(lineNo, line, nextLine) { |
| 23 | var match = line && line.match(/^#+/); |
| 24 | if (match && isHeader(lineNo)) return match[0].length; |
| 25 | match = nextLine && nextLine.match(/^[=\-]+\s*$/); |
| 26 | if (match && isHeader(lineNo + 1)) return nextLine[0] == "=" ? 1 : 2; |
| 27 | return maxDepth; |
| 28 | } |
| 29 | |
| 30 | var firstLine = cm.getLine(start.line), nextLine = cm.getLine(start.line + 1); |
| 31 | var level = headerLevel(start.line, firstLine, nextLine); |
| 32 | if (level === maxDepth) return undefined; |
| 33 | |
| 34 | var lastLineNo = cm.lastLine(); |
| 35 | var end = start.line, nextNextLine = cm.getLine(end + 2); |
| 36 | while (end < lastLineNo) { |
| 37 | if (headerLevel(end + 1, nextLine, nextNextLine) <= level) break; |
| 38 | ++end; |
| 39 | nextLine = nextNextLine; |
| 40 | nextNextLine = cm.getLine(end + 2); |
| 41 | } |
| 42 | |
| 43 | return { |
| 44 | from: CodeMirror.Pos(start.line, firstLine.length), |
| 45 | to: CodeMirror.Pos(end, cm.getLine(end).length) |
| 46 | }; |
| 47 | }); |
| 48 | |
| 49 | }); |
| 50 |