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Merge pull request #20 from SilverStripers/feature/editor-preview
Feature/editor preview
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136 changes: 136 additions & 0 deletions
136
client/src/components/ShortCodeParser/ShortcodeParser.js
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,136 @@ | ||
| 'use strict'; | ||
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| var util = require('util'); | ||
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| const SHORTCODE_ATTRS = /(\s+([a-z0-9\-_]+|([a-z0-9\-_]+)\s*=\s*([a-z0-9\-_]+|\d+\.\d+|'[^']*'|"[^"]*")))*/.toString().slice(1,-1); | ||
| const SHORTCODE_SLASH = /\s*\/?\s*/.toString().slice(1,-1); | ||
| const SHORTCODE_OPEN = /\[\s*%s/.toString().slice(1,-1); | ||
| const SHORTCODE_RIGHT_BRACKET = '\\]'; | ||
| const SHORTCODE_CLOSE = /\[\s*\/\s*%s\s*\]/.toString().slice(1,-1); | ||
| const SHORTCODE_CONTENT = /(.|\n|)*?/.toString().slice(1,-1); | ||
| const SHORTCODE_SPACE = /\s*/.toString().slice(1,-1); | ||
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| class ShortcodeParser { | ||
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| construct() { | ||
| this.shortCodes = {}; | ||
| } | ||
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| registerShortCode(key, callback) { | ||
| this.shortCodes[key] = callback; | ||
| } | ||
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| typecast(val) { | ||
| val = val.trim().replace(/(^['"]|['"]$)/g, ''); | ||
| if (/^\d+$/.test(val)) { | ||
| return parseInt(val, 10); | ||
| } else if (/^\d+\.\d+$/.test(val)) { | ||
| return parseFloat(val); | ||
| } else if (/^(true|false)$/.test(val)) { | ||
| return (val === 'true'); | ||
| } else if (/^undefined$/.test(val)) { | ||
| return undefined; | ||
| } else if (/^null$/i.test(val)) { | ||
| return null; | ||
| } else { | ||
| return val; | ||
| } | ||
| } | ||
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| closeTagString(name) { | ||
| return /^[^a-z0-9]/.test(name) ? util.format('[%s]?%s', name[0].replace('$', '\\$'), name.slice(1)) : name; | ||
| } | ||
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| parseShortcode(name, buf, inline) { | ||
| var regex, match, data = {}, attr = {}; | ||
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| if (inline) { | ||
| regex = new RegExp('^' + util.format(SHORTCODE_OPEN, name) | ||
| + SHORTCODE_ATTRS | ||
| + SHORTCODE_SPACE | ||
| + SHORTCODE_SLASH | ||
| + SHORTCODE_RIGHT_BRACKET, 'i'); | ||
| } else { | ||
| regex = new RegExp('^' + util.format(SHORTCODE_OPEN, name) | ||
| + SHORTCODE_ATTRS | ||
| + SHORTCODE_SPACE | ||
| + SHORTCODE_RIGHT_BRACKET, 'i'); | ||
| } | ||
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| while ((match = buf.match(regex)) !== null) { | ||
| var key = match[3] || match[2]; | ||
| var val = match[4] || match[3]; | ||
| var pattern = match[1]; | ||
| if (pattern) { | ||
| var idx = buf.lastIndexOf(pattern); | ||
| attr[key] = (val !== undefined) ? this.typecast(val) : true; | ||
| buf = buf.slice(0, idx) + buf.slice(idx + pattern.length); | ||
| } else { | ||
| break; | ||
| } | ||
| } | ||
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| attr = Object.keys(attr).reverse().reduce(function(prev, current) { | ||
| prev[current] = attr[current]; return prev; | ||
| }, {}); | ||
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| buf = buf.replace(regex, '').replace(new RegExp(util.format(SHORTCODE_CLOSE, this.closeTagString(name))), ''); | ||
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| return { | ||
| attr: attr, | ||
| content: inline ? buf : buf.replace(/(^\n|\n$)/g, '') | ||
| } | ||
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| } | ||
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| parse(plainText) { | ||
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| for (var name in this.shortCodes) { | ||
| var regex = { | ||
| wrapper: new RegExp(util.format(SHORTCODE_OPEN, name) | ||
| + SHORTCODE_ATTRS | ||
| + SHORTCODE_RIGHT_BRACKET | ||
| + SHORTCODE_CONTENT | ||
| + util.format(SHORTCODE_CLOSE, this.closeTagString(name)), 'gi'), | ||
| inline: new RegExp(util.format(SHORTCODE_OPEN, name) | ||
| + SHORTCODE_ATTRS | ||
| + SHORTCODE_SLASH | ||
| + SHORTCODE_RIGHT_BRACKET, 'gi') | ||
| } | ||
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| let matches = plainText.match(regex.wrapper); | ||
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| if (matches) { | ||
| for (let m,data,i=0,len=matches.length; i < len; i++) { | ||
| m = matches[i]; | ||
| data = this.parseShortcode(name, m); | ||
| plainText = plainText.replace(m, this.shortCodes[name].call(null, data.content, data.attr)); | ||
| } | ||
| } | ||
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| matches = plainText.match(regex.inline); | ||
| if (matches) { | ||
| let m = null; | ||
| while((m = matches.shift()) !== undefined) { | ||
| let data = this.parseShortcode(name, m, true); | ||
| plainText = plainText.replace(m, this.shortCodes[name].call(null, data.content, data.attr)); | ||
| } | ||
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| } | ||
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| } | ||
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| return plainText; | ||
| } | ||
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| } | ||
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| ShortcodeParser.prototype.shortCodes = {}; | ||
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| export default ShortcodeParser; |
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