100 lines
3.7 KiB
JavaScript
100 lines
3.7 KiB
JavaScript
define([
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"underscore",
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"utils",
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"classes/Extension",
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], function(_, utils, Extension) {
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var markdownFootnotes = new Extension("markdownFootnotes", "Markdown Footnotes", true);
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markdownFootnotes.settingsBlock = '<p>Adds support for Markdown footnotes.</p>';
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var inlineTags = new RegExp([
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'^(<\\/?(a|abbr|acronym|applet|area|b|basefont|',
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'bdo|big|button|cite|code|del|dfn|em|figcaption|',
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'font|i|iframe|img|input|ins|kbd|label|map|',
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'mark|meter|object|param|progress|q|ruby|rp|rt|s|',
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'samp|script|select|small|span|strike|strong|',
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'sub|sup|textarea|time|tt|u|var|wbr)[^>]*>|',
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'<(br)\\s?\\/?>)$'
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].join(''), 'i');
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var previousPostConversion = undefined;
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markdownFootnotes.onEditorConfigure = function(editor) {
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var converter = editor.getConverter();
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previousPostConversion = converter.hooks.postConversion;
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converter.hooks.chain("postNormalization", _StripFootnoteDefinitions);
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converter.hooks.chain("postBlockGamut", _DoFootnotes);
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converter.hooks.chain("postConversion", _PrintFootnotes);
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};
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var footnotes = undefined;
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var usedFootnotes = undefined;
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function _StripFootnoteDefinitions(text) {
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footnotes = {};
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usedFootnotes = [];
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text = text.replace(/\n[ ]{0,3}\[\^(.+?)\]\:[ \t]*\n?([\s\S]*?)\n{1,2}((?=\n[ ]{0,3}\S)|\Z)/g, function(wholeMatch, m1, m2) {
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m1 = utils.slugify(m1);
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m2 += "\n";
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m2 = m2.replace(/^[ ]{0,3}/g, "");
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footnotes[m1] = m2;
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return "\n";
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});
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return text;
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}
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var blockGamutHookCallback = undefined;
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function _DoFootnotes(text, blockGamutHookCallbackParam) {
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blockGamutHookCallback = blockGamutHookCallbackParam;
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var footnoteCounter = 0;
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text = text.replace(/\[\^(.+?)\]/g, function(wholeMatch, m1) {
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var id = utils.slugify(m1);
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var footnote = footnotes[id];
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if(footnote === undefined) {
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return "";
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}
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footnoteCounter++;
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usedFootnotes.push(id);
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return '<a href="#fn:' + id + '" id="fnref:' + id + '" title="See footnote" class="footnote">' + footnoteCounter + '</a>';
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});
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return text;
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}
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function _PrintFootnotes(text) {
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if(usedFootnotes.length === 0) {
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return text;
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}
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_.each(footnotes, function(footnote, id) {
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var formattedfootnote = blockGamutHookCallback(footnote);
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formattedfootnote = unescapeSpecialChars(formattedfootnote);
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formattedfootnote = formattedfootnote.replace(/~D/g, "$$").replace(/~T/g, "~");
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formattedfootnote = previousPostConversion(formattedfootnote);
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formattedfootnote = formattedfootnote.replace(/<[^>]*>?/gi, function(tag) {
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return tag.match(inlineTags) ? tag : '';
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});
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footnotes[id] = formattedfootnote;
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});
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text += '\n\n<div class="footnotes">\n<hr>\n<ol>\n\n';
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_.each(usedFootnotes, function(id) {
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var footnote = footnotes[id];
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text += '<li id="fn:' + id + '">' + footnote + ' <a href="#fnref:' + id + '" title="Return to article" class="reversefootnote">↩</a></li>\n\n';
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});
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text += '</ol>\n</div>';
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return text;
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}
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// Duplicated from PageDown converter
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function unescapeSpecialChars(text) {
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// Swap back in all the special characters we've hidden.
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text = text.replace(/~E(\d+)E/g, function(wholeMatch, m1) {
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var charCodeToReplace = parseInt(m1);
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return String.fromCharCode(charCodeToReplace);
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});
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return text;
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}
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return markdownFootnotes;
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}); |