kopia lustrzana https://github.com/miklobit/TiddlyWiki5
394 wiersze
9.7 KiB
JavaScript
394 wiersze
9.7 KiB
JavaScript
/*\
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title: $:/core/modules/parsers/wikiparser/rules/html.js
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type: application/javascript
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module-type: wikirule
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Wiki rule for HTML elements and widgets. For example:
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{{{
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<aside>
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This is an HTML5 aside element
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</aside>
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<$slider target="MyTiddler">
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This is a widget invocation
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</$slider>
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}}}
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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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exports.name = "html";
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exports.types = {inline: true, block: true};
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exports.init = function(parser) {
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this.parser = parser;
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};
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exports.findNextMatch = function(startPos) {
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// Find the next tag
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this.nextTag = this.findNextTag(this.parser.source,startPos,{
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requireLineBreak: this.is.block
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});
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return this.nextTag ? this.nextTag.start : undefined;
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};
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/*
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Parse the most recent match
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*/
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exports.parse = function() {
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// Retrieve the most recent match so that recursive calls don't overwrite it
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var tag = this.nextTag;
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this.nextTag = null;
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// Advance the parser position to past the tag
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this.parser.pos = tag.end;
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// Check for a following linebreak
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var hasLineBreak = !tag.isSelfClosing && !!this.parseTokenRegExp(this.parser.source,this.parser.pos,/(\r?\n)/g);
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// Set whether we're in block mode
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tag.isBlock = this.is.block || hasLineBreak;
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// Parse the body if we need to
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if(!tag.isSelfClosing && $tw.config.htmlVoidElements.indexOf(tag.tag) === -1) {
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var reEndString = "</" + $tw.utils.escapeRegExp(tag.tag) + ">",
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reEnd = new RegExp("(" + reEndString + ")","mg");
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if(hasLineBreak) {
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tag.children = this.parser.parseBlocks(reEndString);
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} else {
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tag.children = this.parser.parseInlineRun(reEnd);
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}
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reEnd.lastIndex = this.parser.pos;
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var endMatch = reEnd.exec(this.parser.source);
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if(endMatch && endMatch.index === this.parser.pos) {
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this.parser.pos = endMatch.index + endMatch[0].length;
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}
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}
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// Return the tag
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return [tag];
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};
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/*
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Look for a whitespace token. Returns null if not found, otherwise returns {type: "whitespace", start:, end:,}
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*/
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exports.parseWhiteSpace = function(source,pos) {
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var node = {
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type: "whitespace",
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start: pos
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};
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var re = /(\s)+/g;
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re.lastIndex = pos;
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var match = re.exec(source);
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if(match && match.index === pos) {
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node.end = pos + match[0].length;
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return node;
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}
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return null;
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};
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/*
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Convenience wrapper for parseWhiteSpace
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*/
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exports.skipWhiteSpace = function(source,pos) {
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var whitespace = this.parseWhiteSpace(source,pos);
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if(whitespace) {
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return whitespace.end;
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}
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return pos;
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};
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/*
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Look for a given string token. Returns null if not found, otherwise returns {type: "token", value:, start:, end:,}
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*/
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exports.parseTokenString = function(source,pos,token) {
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var match = source.indexOf(token,pos) === pos;
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if(match) {
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return {
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type: "token",
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value: token,
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start: pos,
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end: pos + token.length
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};
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}
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return null;
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};
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/*
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Look for a token matching a regex. Returns null if not found, otherwise returns {type: "regexp", match:, start:, end:,}
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*/
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exports.parseTokenRegExp = function(source,pos,reToken) {
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var node = {
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type: "regexp",
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start: pos
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};
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reToken.lastIndex = pos;
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node.match = reToken.exec(source);
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if(node.match && node.match.index === pos) {
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node.end = pos + node.match[0].length;
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return node;
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} else {
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return null;
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}
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};
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/*
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Look for a string literal. Returns null if not found, otherwise returns {type: "string", value:, start:, end:,}
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*/
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exports.parseStringLiteral = function(source,pos) {
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var node = {
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type: "string",
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start: pos
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};
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var reString = /(?:"([^"]*)")|(?:'([^']*)')/g;
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reString.lastIndex = pos;
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var match = reString.exec(source);
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if(match && match.index === pos) {
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node.value = match[1] === undefined ? match[2] : match[1];
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node.end = pos + match[0].length;
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return node;
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} else {
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return null;
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}
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};
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/*
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Look for a macro invocation parameter. Returns null if not found, or {type: "macro-parameter", name:, value:, start:, end:}
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*/
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exports.parseMacroParameter = function(source,pos) {
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var node = {
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type: "macro-parameter",
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start: pos
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};
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// Define our regexp
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var reMacroParameter = /(?:([A-Za-z0-9\-_]+)\s*:)?(?:\s*(?:"([^"]*)"|'([^']*)'|\[\[([^\]]*)\]\]|([^\s>"'=]+)))/g;
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// Skip whitespace
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pos = this.skipWhiteSpace(source,pos);
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// Look for the parameter
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var token = this.parseTokenRegExp(source,pos,reMacroParameter);
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if(!token) {
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return null;
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}
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pos = token.end;
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// Get the parameter details
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node.value = token.match[2] !== undefined ? token.match[2] : (
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token.match[3] !== undefined ? token.match[3] : (
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token.match[4] !== undefined ? token.match[4] : (
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token.match[5] !== undefined ? token.match[5] : (
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""
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)
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)
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)
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);
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if(token.match[1]) {
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node.name = token.match[1];
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}
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// Update the end position
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node.end = pos;
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return node;
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};
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/*
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Look for a macro invocation. Returns null if not found, or {type: "macrocall", name:, parameters:, start:, end:}
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*/
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exports.parseMacroInvocation = function(source,pos) {
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var node = {
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type: "macrocall",
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start: pos,
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params: []
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};
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// Define our regexps
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var reMacroName = /([^\s>"'=]+)/g;
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// Skip whitespace
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pos = this.skipWhiteSpace(source,pos);
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// Look for a double less than sign
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var token = this.parseTokenString(source,pos,"<<");
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if(!token) {
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return null;
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}
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pos = token.end;
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// Get the macro name
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var name = this.parseTokenRegExp(source,pos,reMacroName);
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if(!name) {
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return null;
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}
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node.name = name.match[1];
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pos = name.end;
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// Process parameters
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var parameter = this.parseMacroParameter(source,pos);
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while(parameter) {
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node.params.push(parameter);
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pos = parameter.end;
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// Get the next parameter
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parameter = this.parseMacroParameter(source,pos);
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}
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// Skip whitespace
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pos = this.skipWhiteSpace(source,pos);
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// Look for a double greater than sign
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token = this.parseTokenString(source,pos,">>");
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if(!token) {
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return null;
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}
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pos = token.end;
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// Update the end position
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node.end = pos;
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return node;
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};
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/*
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Look for an HTML attribute definition. Returns null if not found, otherwise returns {type: "attribute", name:, valueType: "string|indirect|macro", value:, start:, end:,}
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*/
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exports.parseAttribute = function(source,pos) {
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var node = {
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start: pos
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};
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// Define our regexps
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var reAttributeName = /([^\/\s>"'=]+)/g,
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reUnquotedAttribute = /([^\/\s<>"'=]+)/g,
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reIndirectValue = /\{\{([^\}]+)\}\}/g;
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// Skip whitespace
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pos = this.skipWhiteSpace(source,pos);
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// Get the attribute name
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var name = this.parseTokenRegExp(source,pos,reAttributeName);
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if(!name) {
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return null;
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}
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node.name = name.match[1];
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pos = name.end;
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// Skip whitespace
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pos = this.skipWhiteSpace(source,pos);
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// Look for an equals sign
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var token = this.parseTokenString(source,pos,"=");
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if(token) {
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pos = token.end;
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// Skip whitespace
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pos = this.skipWhiteSpace(source,pos);
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// Look for a string literal
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var stringLiteral = this.parseStringLiteral(source,pos);
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if(stringLiteral) {
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pos = stringLiteral.end;
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node.type = "string";
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node.value = stringLiteral.value;
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} else {
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// Look for an indirect value
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var indirectValue = this.parseTokenRegExp(source,pos,reIndirectValue);
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if(indirectValue) {
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pos = indirectValue.end;
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node.type = "indirect";
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node.textReference = indirectValue.match[1];
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} else {
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// Look for a unquoted value
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var unquotedValue = this.parseTokenRegExp(source,pos,reUnquotedAttribute);
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if(unquotedValue) {
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pos = unquotedValue.end;
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node.type = "string";
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node.value = unquotedValue.match[1];
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} else {
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// Look for a macro invocation value
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var macroInvocation = this.parseMacroInvocation(source,pos);
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if(macroInvocation) {
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pos = macroInvocation.end;
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node.type = "macro";
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node.value = macroInvocation;
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} else {
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node.type = "string";
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node.value = "true";
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}
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}
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}
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}
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} else {
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node.type = "string";
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node.value = "true";
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}
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// Update the end position
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node.end = pos;
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return node;
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};
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/*
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Look for an HTML tag. Returns null if not found, otherwise returns {type: "tag", name:, attributes: [], isSelfClosing:, start:, end:,}
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*/
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exports.parseTag = function(source,pos,options) {
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options = options || {};
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var token,
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node = {
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type: "element",
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start: pos,
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attributes: {}
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};
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// Define our regexps
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var reTagName = /([a-zA-Z0-9\-\$]+)/g;
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// Skip whitespace
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pos = this.skipWhiteSpace(source,pos);
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// Look for a less than sign
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token = this.parseTokenString(source,pos,"<");
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if(!token) {
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return null;
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}
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pos = token.end;
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// Get the tag name
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token = this.parseTokenRegExp(source,pos,reTagName);
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if(!token) {
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return null;
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}
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node.tag = token.match[1];
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pos = token.end;
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// Process attributes
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var attribute = this.parseAttribute(source,pos);
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while(attribute) {
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node.attributes[attribute.name] = attribute;
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pos = attribute.end;
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// Get the next attribute
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attribute = this.parseAttribute(source,pos);
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}
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// Skip whitespace
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pos = this.skipWhiteSpace(source,pos);
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// Look for a closing slash
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token = this.parseTokenString(source,pos,"/");
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if(token) {
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pos = token.end;
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node.isSelfClosing = true;
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}
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// Look for a greater than sign
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token = this.parseTokenString(source,pos,">");
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if(!token) {
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return null;
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}
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pos = token.end;
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// Check for a required line break
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if(options.requireLineBreak) {
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token = this.parseTokenRegExp(source,pos,/(\r?\n)/g);
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if(!token) {
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return null;
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}
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}
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// Update the end position
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node.end = pos;
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return node;
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};
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exports.findNextTag = function(source,pos,options) {
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// A regexp for finding candidate HTML tags
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var reLookahead = /<([a-zA-Z\-\$]+)/g;
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// Find the next candidate
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reLookahead.lastIndex = pos;
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var match = reLookahead.exec(source);
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while(match) {
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// Try to parse the candidate as a tag
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var tag = this.parseTag(source,match.index,options);
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// Return success
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if(tag) {
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return tag;
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}
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// Look for the next match
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reLookahead.lastIndex = match.index + 1;
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match = reLookahead.exec(source);
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}
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// Failed
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return null;
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};
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})();
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