markdown-fold.js (1605B)
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 });