540 lines
15 KiB
JavaScript
540 lines
15 KiB
JavaScript
/*\
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title: $:/plugins/tiddlywiki/markdown/markdown-it-tiddlywiki.js
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type: application/javascript
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module-type: library
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Wraps up the markdown-it parser for use as a Parser in TiddlyWiki
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\*/
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(function(){
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/*jslint node: true, browser: true */
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/*global $tw: false */
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"use strict";
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var md;
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var pluginOpts;
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var TWMarkReplacements = {
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"{" : "{",
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"[" : "[",
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"$" : "$"
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};
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var TWMarkRegEx = /[{[$]/g;
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function encodeTWMark(match) {
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return TWMarkReplacements[match];
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}
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// escpae {, [ and $ in string s
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function escapeTWMarks(s) {
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s = String(s);
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TWMarkRegEx.lastIndex = 0;
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return s.replace(TWMarkRegEx,encodeTWMark);
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}
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// escape anything that could be interpreted as transclusion or syslink
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function render_code_inline(tokens,idx,options,env,slf) {
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tokens[idx].attrJoin('class','_codified_');
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return '<code' + slf.renderAttrs(tokens[idx]) + '>'
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+ escapeTWMarks(md.utils.escapeHtml(tokens[idx].content))
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+ '</code>';
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}
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function render_code_block(tokens,idx) {
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return '<$codeblock code=e"' + md.utils.escapeHtml(tokens[idx].content) + '" language=""/>\n';
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}
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function render_fence(tokens,idx) {
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var info = tokens[idx].info ? md.utils.unescapeAll(tokens[idx].info).trim() : '';
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return '<$codeblock code=e"' + md.utils.escapeHtml(tokens[idx].content) + '" language="' + info.split(/(\s+)/g)[0] + '"/>\n';
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}
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// add a blank line after opening tag to activate TW block parsing
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function render_paragraph_open(tokens,idx) {
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return tokens[idx].hidden ? '' : '<p>\n\n';
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}
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function render_paragraph_close(tokens,idx) {
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return tokens[idx].hidden ? '' : '\n</p>\n';
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}
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// Replace footnote links with "qualified" internal links
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function render_footnote_ref(tokens,idx,options,env,slf) {
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var id = slf.rules.footnote_anchor_name(tokens,idx,options,env,slf);
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var caption = slf.rules.footnote_caption(tokens,idx,options,env,slf);
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var refid = id;
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if(tokens[idx].meta.subId > 0) {
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refid += ':' + tokens[idx].meta.subId;
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}
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return '<a class="footnote-ref" href=<<qualify "##fn' + id + '">> id=<<qualify "#fnref' + refid + '">>>' + caption + '</a>';
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}
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function render_footnote_open(tokens,idx,options,env,slf) {
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var id = slf.rules.footnote_anchor_name(tokens,idx,options,env,slf);
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if(tokens[idx].meta.subId > 0) {
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id += ':' + tokens[idx].meta.subId;
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}
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return '<li id=<<qualify "#fn' + id + '">> class="footnote-item">';
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}
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function render_footnote_anchor(tokens,idx,options,env,slf) {
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var id = slf.rules.footnote_anchor_name(tokens,idx,options,env,slf);
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if(tokens[idx].meta.subId > 0) {
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id += ':' + tokens[idx].meta.subId;
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}
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// append variation selector to prevent display as Apple Emoji on iOS
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return '<a href=<<qualify "##fnref' + id + '">> class="footnote-backref">\u21A5\uFE0E</a>';
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}
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// do not un-escape html entities and escape characters
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function render_text_special(tokens,idx) {
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if(tokens[idx].info === 'entity') {
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return tokens[idx].markup;
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}
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return escapeTWMarks(md.utils.escapeHtml(tokens[idx].content));
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}
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function render_tw_expr(tokens,idx) {
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return tokens[idx].content;
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}
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// Overwrite default: attribute values can be either a string or {type;, value:}.
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// 1) string attr val: render in e"..." format so HTML entities can be decoded.
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// 2) object attr val: render value as is.
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function render_token_attrs(token) {
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var i, l, result;
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if(!token.attrs) { return ''; }
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result = '';
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for(i=0, l=token.attrs.length; i<l; i++) {
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if(typeof token.attrs[i][1] === "object" && token.attrs[i][1] !== null) {
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result += ' ' + md.utils.escapeHtml(token.attrs[i][0]) + '=' + token.attrs[i][1].value;
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} else {
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result += ' ' + md.utils.escapeHtml(token.attrs[i][0]) + '=e"' + md.utils.escapeHtml(token.attrs[i][1]) + '"';
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}
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}
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return result;
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}
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// given tw parsing rule and starting pos, returns match index or undefined
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// assumes pos >= 0
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function findNextMatch(ruleinfo,pos) {
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// ruleinfo.matchIndex needs to be -1 at the start of inline state
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if(ruleinfo.matchIndex < pos) {
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ruleinfo.matchIndex = ruleinfo.rule.findNextMatch(pos);
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}
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return ruleinfo.matchIndex;
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}
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// Add inline rule "macrocall" to parse <<macroname ...>>
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var MacroCallRegEx = /<<([^\s>"'=]+)[^>]*>>/g;
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function tw_macrocallinline(state,silent) {
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var match, max, pos = state.pos;
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// Check start
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max = state.posMax;
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if(state.src.charCodeAt(pos) !== 0x3C || state.src.charCodeAt(pos+1) !== 0x3C /* << */|| pos + 3 >= max) {
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return false;
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}
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MacroCallRegEx.lastIndex = pos;
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match = MacroCallRegEx.exec(state.src);
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if(!match || match.index !== pos) { return false; }
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if(!silent) {
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var token = state.push('tw_expr','',0);
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token.content = state.src.slice(pos,pos+match[0].length);
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}
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state.pos = MacroCallRegEx.lastIndex;
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return true;
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}
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// parse transclusion elements
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function tw_transcludeinline(state,silent) {
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var ruleinfo = pluginOpts.inlineRules.transcludeinline;
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var pos = state.pos;
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var matchIndex = findNextMatch(ruleinfo,pos);
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if(matchIndex === undefined || matchIndex !== pos) {
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return false;
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}
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if(!silent) {
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var token = state.push('tw_expr','',0);
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token.content = state.src.slice(pos,pos+ruleinfo.rule.match[0].length);
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}
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state.pos += ruleinfo.rule.match[0].length;
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return true;
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}
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// parse filtered transclusion elements
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function tw_filteredtranscludeinline(state,silent) {
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var ruleinfo = pluginOpts.inlineRules.filteredtranscludeinline;
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var pos = state.pos;
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var matchIndex = findNextMatch(ruleinfo,pos);
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if(matchIndex === undefined || matchIndex !== pos) {
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return false;
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}
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if(!silent) {
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var token = state.push('tw_expr','',0);
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if(state.linkLevel > 0) {
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var filter = ruleinfo.rule.match[1];
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token.content = '<$text text={{{' + filter + '}}}/>';
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} else {
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token.content = state.src.slice(pos,pos+ruleinfo.rule.match[0].length);
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}
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}
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state.pos += ruleinfo.rule.match[0].length;
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return true;
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}
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// based on markdown-it html_block()
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var WidgetTagRegEx = [/^<\/?\$[a-zA-Z0-9\-\$]+(?=(\s|\/?>|$))/, /^$/];
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function tw_block(state,startLine,endLine,silent) {
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var i, nextLine, token, lineText,
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pos = state.bMarks[startLine] + state.tShift[startLine],
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max = state.eMarks[startLine];
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// if it's indented more than 3 spaces, it should be a code block
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if(state.sCount[startLine] - state.blkIndent >= 4) { return false; }
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if(!state.md.options.html) { return false; }
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if(state.src.charCodeAt(pos) !== 0x3C/* < */) { return false; }
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lineText = state.src.slice(pos,max);
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if(!WidgetTagRegEx[0].test(lineText)) { return false; }
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if(silent) {
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// don't let widgets interrupt a paragrpah
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return false;
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}
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nextLine = startLine + 1;
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// If we are here - we detected HTML block.
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// Let's roll down till block end.
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if(!WidgetTagRegEx[1].test(lineText)) {
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for(; nextLine < endLine; nextLine++) {
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if(state.sCount[nextLine] < state.blkIndent) { break; }
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pos = state.bMarks[nextLine] + state.tShift[nextLine];
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max = state.eMarks[nextLine];
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lineText = state.src.slice(pos,max);
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if(WidgetTagRegEx[1].test(lineText)) {
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if(lineText.length !== 0) { nextLine++; }
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break;
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}
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}
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}
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state.line = nextLine;
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token = state.push('html_block','',0);
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token.map = [ startLine, nextLine ];
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token.content = state.getLines(startLine,nextLine,state.blkIndent,true);
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return true;
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}
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// parse [img[...]] elements
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function tw_image(state,silent) {
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var ruleinfo = pluginOpts.inlineRules.image;
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// ignore at parseLinkLabel stage; will be recognized in tokenize()
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if(state.parsingLinkLabel > 0) {
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return false;
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}
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var pos = state.pos;
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var matchIndex = findNextMatch(ruleinfo,pos);
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if(matchIndex === undefined || matchIndex !== pos) {
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return false;
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}
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if(!silent) {
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var twNode = ruleinfo.rule.parse()[0];
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var token = state.push('$image','$image',0);
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$tw.utils.each(twNode.attributes,function(attr,id) {
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switch(attr.type) {
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case "filtered":
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token.attrSet(id,{ type: "filtered", value: "{{{" + attr.filter + "}}}" });
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break;
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case "indirect":
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token.attrSet(id,{ type: "indirect", value: "{{" + attr.textReference + "}}" });
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break;
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case "macro":
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token.attrSet(id,{ type: "macro", value: ruleinfo.rule.parser.source.substring(attr.value.start,attr.value.end) });
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break;
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default:
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token.attrSet(id,attr.value);
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}
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});
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token.markup = 'tw_image';
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}
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state.pos = ruleinfo.rule.parser.pos;
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return true;
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}
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// parse [[link]] elements
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function tw_prettylink(state,silent) {
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var ruleinfo = pluginOpts.inlineRules.prettylink;
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// skip if in link label
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if(state.linkLevel > 0 || state.parsingLinkLabel > 0) {
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return false;
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}
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var pos = state.pos;
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var matchIndex = findNextMatch(ruleinfo,pos);
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if(matchIndex === undefined || matchIndex !== pos) {
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return false;
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}
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if(!silent) {
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var twNode = ruleinfo.rule.parse()[0];
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var tag = (twNode.type==='link' ? '$link' : 'a');
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// push a link_open token so markdown's core.linkify will ignore
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var token = state.push('link_open',tag,1);
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$tw.utils.each(twNode.attributes,function(attr,id) {
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token.attrSet(id,attr.value);
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});
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token.attrJoin('class','_codified_');
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token.markup = 'tw_prettylink';
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state.linkLevel++;
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token = state.push('text','',0);
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token.content = twNode.children[0].text;
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state.linkLevel--;
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token = state.push('link_close',tag,-1);
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token.markup = 'tw_prettylink';
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}
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state.pos = ruleinfo.rule.parser.pos;
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return true;
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}
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function tw_prettyextlink(state,silent) {
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var ruleinfo = pluginOpts.inlineRules.prettyextlink;
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// skip if in link label
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if(state.linkLevel > 0 || state.parsingLinkLabel > 0) {
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return false;
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}
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var pos = state.pos;
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var matchIndex = findNextMatch(ruleinfo,pos);
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if(matchIndex === undefined || matchIndex !== pos) {
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return false;
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}
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if(!silent) {
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var twNode = ruleinfo.rule.parse()[0];
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var token = state.push('link_open','a',1);
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$tw.utils.each(twNode.attributes,function(attr,id) {
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token.attrSet(id,attr.value);
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});
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token.attrJoin('class','_codified_');
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token.markup = 'tw_prettyextlink';
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state.linkLevel++;
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token = state.push('text','',0);
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token.content = twNode.children[0].text;
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state.linkLevel--;
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token = state.push('link_close','a',-1);
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token.markup = 'tw_prettyextlink';
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}
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state.pos = ruleinfo.rule.parser.pos;
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return true;
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}
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var TWCloseTagRegEx = /<\/\$[A-Za-z0-9\-\$]+\s*>/gm;
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function extendHtmlInline(origRule) {
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return function(state,silent) {
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if(origRule(state,silent)) {
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return true;
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}
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var token, pos = state.pos;
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var parseTag = $tw.Wiki.parsers['text/vnd.tiddlywiki'].prototype.inlineRuleClasses.html.prototype.parseTag;
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var tag = parseTag(state.src,pos,{});
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if(tag) {
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if(!silent) {
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token = state.push('html_inline','',0);
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token.content = state.src.slice(pos,tag.end);
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}
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state.pos = tag.end;
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return true;
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}
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TWCloseTagRegEx.lastIndex = pos;
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var match = TWCloseTagRegEx.exec(state.src);
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if(!match || match.index !== pos) {
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return false;
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}
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if(!silent) {
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token = state.push('html_inline','',0);
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token.content = state.src.slice(pos,pos + match[0].length);
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}
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state.pos = TWCloseTagRegEx.lastIndex;
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return true;
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};
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}
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function extendParseLinkLabel(origFunc) {
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return function(state,start,disableNested) {
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if(state.parsingLinkLabel === undefined) {
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state.parsingLinkLabel = 0;
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}
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state.parsingLinkLabel++;
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var labelEnd = origFunc(state,start,disableNested);
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state.parsingLinkLabel--;
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return labelEnd;
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};
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}
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// reset each tw inline rule to initial inline state
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function extendInlineParse(thisArg,origFunc,twInlineRules) {
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return function(str,md,env,outTokens) {
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var i, ruleinfo, key;
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for(key in twInlineRules) {
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ruleinfo = twInlineRules[key];
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ruleinfo.rule.parser.source = str;
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ruleinfo.rule.parser.sourceLength = str.length;
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ruleinfo.rule.parser.pos = 0; // not used
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ruleinfo.matchIndex = -1;
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}
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origFunc.call(thisArg,str,md,env,outTokens);
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}
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}
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/// post processing ///
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function wikify(state) {
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var href, title, src, alt;
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var tagStack = [];
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state.tokens.forEach(function(blockToken) {
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if(blockToken.type === 'inline' && blockToken.children) {
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blockToken.children.forEach(function(token) {
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switch(token.type) {
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case 'link_open':
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if(token.markup === 'tw_prettylink' || token.markup === 'tw_prettyextlink') {
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return;
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}
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href = token.attrGet('href');
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if(href[0] === '#') {
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token.tag = '$link';
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href = $tw.utils.decodeURIComponentSafe(href.substring(1));
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title = token.attrGet('title');
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token.attrs = [['to', href], ['class', '_codified_']];
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if(title) {
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token.attrSet('tooltip',title);
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}
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} else {
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token.attrSet('target','_blank');
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token.attrJoin('class','tc-tiddlylink-external');
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token.attrJoin('class','_codified_');
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token.attrSet('rel','noopener noreferrer');
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}
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tagStack.push(token.tag);
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break;
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case 'link_close':
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if(token.markup === 'tw_prettylink' || token.markup === 'tw_prettyextlink') {
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return;
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}
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token.tag = tagStack.pop();
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break;
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case 'image':
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token.tag = '$image';
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src = token.attrGet('src');
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alt = token.attrGet('alt');
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title = token.attrGet('title');
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token.attrs[token.attrIndex('src')][0] = 'source';
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if(src[0] === '#') {
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src = $tw.utils.decodeURIComponentSafe(src.substring(1));
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token.attrSet('source',src);
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}
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if(title) {
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token.attrs[token.attrIndex('title')][0] = 'tooltip';
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}
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break;
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}
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});
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}
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});
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}
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module.exports = function tiddlyWikiPlugin(markdown,options) {
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var defaults = {
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renderWikiText: false,
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blockRules: {},
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inlineRules: {}
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};
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md = markdown;
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pluginOpts = md.utils.assign({},defaults,options||{});
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md.renderer.rules.code_inline = render_code_inline;
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md.renderer.rules.code_block = render_code_block;
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md.renderer.rules.fence = render_fence;
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md.renderer.rules.paragraph_open = render_paragraph_open;
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md.renderer.rules.paragraph_close = render_paragraph_close;
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md.renderer.rules.footnote_ref = render_footnote_ref;
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md.renderer.rules.footnote_open = render_footnote_open;
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md.renderer.rules.footnote_anchor = render_footnote_anchor;
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md.renderer.rules.text_special = render_text_special;
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md.renderer.rules.tw_expr = render_tw_expr;
|
|
md.renderer.renderAttrs = render_token_attrs;
|
|
|
|
if(pluginOpts.renderWikiText) {
|
|
md.helpers.parseLinkLabel = extendParseLinkLabel(md.helpers.parseLinkLabel);
|
|
|
|
if(pluginOpts.inlineRules.image) {
|
|
md.inline.ruler.after('link','tw_image',tw_image);
|
|
}
|
|
if(pluginOpts.inlineRules.prettyextlink) {
|
|
md.inline.ruler.after('link','tw_prettyextlink',tw_prettyextlink);
|
|
}
|
|
if(pluginOpts.inlineRules.prettylink) {
|
|
md.inline.ruler.after('link','tw_prettylink',tw_prettylink);
|
|
}
|
|
if(pluginOpts.inlineRules.filteredtranscludeinline) {
|
|
md.inline.ruler.before('html_inline','tw_filteredtranscludeinline',tw_filteredtranscludeinline);
|
|
}
|
|
if(pluginOpts.inlineRules.transcludeinline) {
|
|
md.inline.ruler.before('html_inline','tw_transcludeinline',tw_transcludeinline);
|
|
}
|
|
|
|
md.inline.ruler.before('html_inline','tw_macrocallinline',tw_macrocallinline);
|
|
md.inline.ruler.at('html_inline',extendHtmlInline(md.inline.ruler.__rules__[md.inline.ruler.__find__('html_inline')].fn));
|
|
md.block.ruler.after('html_block','tw_block',tw_block,{
|
|
alt: [ 'paragraph', 'reference', 'blockquote' ]
|
|
});
|
|
md.inline.parse = extendInlineParse(md.inline,md.inline.parse,options.inlineRules);
|
|
}
|
|
|
|
md.core.ruler.disable('text_join');
|
|
md.core.ruler.push('wikify',wikify);
|
|
};
|
|
|
|
})();
|