83 lines
2.3 KiB
JavaScript
83 lines
2.3 KiB
JavaScript
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const HighlightLines = require('./HighlightLines');
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class LiquidHighlight {
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constructor(liquidEngine) {
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this.liquidEngine = liquidEngine;
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this.hooks = [];
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this.classHooks = [];
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}
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addHook(hookFunction) {
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this.hooks.push(hookFunction);
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}
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addClassHook(hookFunction) {
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this.classHooks.push(hookFunction);
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}
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getObject() {
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let ret = function(highlighter) {
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return {
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parse: function(tagToken, remainTokens) {
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let split = tagToken.args.split(" ");
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this.language = split[0];
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this.highlights = new HighlightLines(split.length === 2 ? split[1] : "");
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this.highlightsAdd = new HighlightLines(split.length === 3 ? split[1] : "");
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this.highlightsRemove = new HighlightLines(split.length === 3 ? split[2] : "");
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this.tokens = [];
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var stream = highlighter.liquidEngine.parser.parseStream(remainTokens);
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stream
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.on('token', token => {
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if (token.name === 'endhighlight') {
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stream.stop();
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} else {
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this.tokens.push(token);
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}
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})
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.on('end', x => {
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throw new Error("tag highlight not closed");
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});
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stream.start();
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},
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render: function(scope, hash) {
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let tokens = this.tokens.map(token => token.raw);
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let tokenStr = tokens.join('').trim();
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for( let hook of highlighter.hooks ) {
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tokenStr = hook.call(this, this.language, tokenStr);
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}
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let lines = tokenStr.split("\n").map(function(line, j) {
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let classHookClasses = [];
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for( let classHook of highlighter.classHooks ) {
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let ret = classHook(this.language, line, j);
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if( ret ) {
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classHookClasses.push(ret);
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}
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}
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return '<div class="highlight-line' +
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(this.highlights.isHighlighted(j) ? ' highlight-line-active' : '') +
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(this.highlightsAdd.isHighlighted(j) ? ' highlight-line-add' : '') +
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(this.highlightsRemove.isHighlighted(j) ? ' highlight-line-remove' : '') +
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(classHookClasses.length ? " " + classHookClasses.join(" ") : "") +
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'">' +
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line +
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'</div>';
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}.bind(this));
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return Promise.resolve(`<pre class="language-${this.language}"><code class="language-${this.language}">` + lines.join("") + "</code></pre>");
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}
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};
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};
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return ret(this);
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}
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}
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module.exports = LiquidHighlight;
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