mirror of
https://github.com/showdownjs/showdown.git
synced 2024-03-22 13:30:55 +08:00
94 lines
3.3 KiB
JavaScript
94 lines
3.3 KiB
JavaScript
showdown.subParser('headers', function (text, options, globals) {
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'use strict';
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text = globals.converter._dispatch('headers.before', text, options, globals);
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var prefixHeader = options.prefixHeaderId,
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headerLevelStart = (isNaN(parseInt(options.headerLevelStart))) ? 1 : parseInt(options.headerLevelStart),
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ghHeaderId = options.ghCompatibleHeaderId,
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// Set text-style headers:
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// Header 1
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// ========
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//
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// Header 2
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// --------
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//
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setextRegexH1 = (options.smoothLivePreview) ? /^(.+)[ \t]*\n={2,}[ \t]*\n+/gm : /^(.+)[ \t]*\n=+[ \t]*\n+/gm,
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setextRegexH2 = (options.smoothLivePreview) ? /^(.+)[ \t]*\n-{2,}[ \t]*\n+/gm : /^(.+)[ \t]*\n-+[ \t]*\n+/gm;
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text = text.replace(setextRegexH1, function (wholeMatch, m1) {
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var spanGamut = showdown.subParser('spanGamut')(m1, options, globals),
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hID = (options.noHeaderId) ? '' : ' id="' + headerId(m1) + '"',
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hLevel = headerLevelStart,
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hashBlock = '<h' + hLevel + hID + '>' + spanGamut + '</h' + hLevel + '>';
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return showdown.subParser('hashBlock')(hashBlock, options, globals);
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});
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text = text.replace(setextRegexH2, function (matchFound, m1) {
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var spanGamut = showdown.subParser('spanGamut')(m1, options, globals),
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hID = (options.noHeaderId) ? '' : ' id="' + headerId(m1) + '"',
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hLevel = headerLevelStart + 1,
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hashBlock = '<h' + hLevel + hID + '>' + spanGamut + '</h' + hLevel + '>';
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return showdown.subParser('hashBlock')(hashBlock, options, globals);
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});
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// atx-style headers:
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// # Header 1
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// ## Header 2
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// ## Header 2 with closing hashes ##
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// ...
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// ###### Header 6
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//
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var atxStyle = (options.requireSpaceBeforeHeadingText) ? /^(#{1,6})[ \t]+(.+?)[ \t]*#*\n+/gm : /^(#{1,6})[ \t]*(.+?)[ \t]*#*\n+/gm;
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text = text.replace(atxStyle, function (wholeMatch, m1, m2) {
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var span = showdown.subParser('spanGamut')(m2, options, globals),
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hID = (options.noHeaderId) ? '' : ' id="' + headerId(m2) + '"',
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hLevel = headerLevelStart - 1 + m1.length,
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header = '<h' + hLevel + hID + '>' + span + '</h' + hLevel + '>';
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return showdown.subParser('hashBlock')(header, options, globals);
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});
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function headerId(m) {
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var title, escapedId;
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if (ghHeaderId) {
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escapedId = m
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.replace(/ /g, '-')
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//replace previously escaped chars (&, ~ and $)
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.replace(/&/g, '')
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.replace(/~T/g, '')
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.replace(/~D/g, '')
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//replace rest of the chars (&~$ are repeated as they might have been escaped)
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// borrowed from github's redcarpet (some they should produce similar results)
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.replace(/[&+$,\/:;=?@"#{}|^~\[\]`\\*)(%.!'<>]/g, '')
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.toLowerCase();
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} else {
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escapedId = m.replace(/[^\w]/g, '').toLowerCase();
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}
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if (globals.hashLinkCounts[escapedId]) {
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title = escapedId + '-' + (globals.hashLinkCounts[escapedId]++);
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} else {
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title = escapedId;
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globals.hashLinkCounts[escapedId] = 1;
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}
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// Prefix id to prevent causing inadvertent pre-existing style matches.
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if (prefixHeader === true) {
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prefixHeader = 'section';
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}
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if (showdown.helper.isString(prefixHeader)) {
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return prefixHeader + title;
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}
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return title;
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}
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text = globals.converter._dispatch('headers.after', text, options, globals);
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return text;
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});
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