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CodeMirror.registerHelper("fold", "markdown", function(cm, start) {
var maxDepth = 100;
function isHeader(lineNo) {
var tokentype = cm.getTokenTypeAt(CodeMirror.Pos(lineNo, 0));
return tokentype && /\bheader\b/.test(tokentype);
}
function headerLevel(lineNo, line, nextLine) {
var match = line && line.match(/^#+/);
if (match && isHeader(lineNo)) return match[0].length;
match = nextLine && nextLine.match(/^[=\-]+\s*$/);
if (match && isHeader(lineNo + 1)) return nextLine[0] == "=" ? 1 : 2;
return maxDepth;
}
var firstLine = cm.getLine(start.line), nextLine = cm.getLine(start.line + 1);
var level = headerLevel(start.line, firstLine, nextLine);
if (level === maxDepth) return undefined;
var lastLineNo = cm.lastLine();
var end = start.line, nextNextLine = cm.getLine(end + 2);
while (end < lastLineNo) {
if (headerLevel(end + 1, nextLine, nextNextLine) <= level) break;
++end;
nextLine = nextNextLine;
nextNextLine = cm.getLine(end + 2);
}
return {
from: CodeMirror.Pos(start.line, firstLine.length),
to: CodeMirror.Pos(end, cm.getLine(end).length)
};
});
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