118 lines
2.6 KiB
JavaScript
118 lines
2.6 KiB
JavaScript
/*!
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* markdown-it-regexp
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* Copyright (c) 2014 Alex Kocharin
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* MIT Licensed
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*/
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var inherits = function(ctor, superCtor) {
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ctor.super_ = superCtor;
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ctor.prototype = Object.create(superCtor.prototype, {
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constructor: {
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value: ctor,
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enumerable: false,
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writable: true,
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configurable: true
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}
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});
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};
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/**
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* Escape special characters in the given string of html.
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*
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* Borrowed from escape-html component, MIT-licensed
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*/
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var stuff = {};
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stuff.escape = function(html) {
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return String(html)
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.replace(/&/g, '&')
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.replace(/"/g, '"')
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.replace(/'/g, ''')
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.replace(/</g, '<')
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.replace(/>/g, '>')
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}
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Object.setPrototypeOf = Object.setPrototypeOf || function (obj, proto) {
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if (!isIE9()) {
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obj.__proto__ = proto;
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} else {
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/** IE9 fix - copy object methods from the protype to the new object **/
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for (var prop in proto) {
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obj[prop] = proto[prop];
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}
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}
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return obj;
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};
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var isIE9 = function() {
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return navigator.appVersion.indexOf("MSIE") > 0;
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};
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/**
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* Counter for multi usage.
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*/
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var counter = 0
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/**
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* Constructor function
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*/
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function Plugin(regexp, replacer) {
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// return value should be a callable function
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// with strictly defined options passed by markdown-it
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var self = function (md, options) {
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self.options = options
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self.init(md)
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}
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// initialize plugin object
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Object.setPrototypeOf(self, Plugin.prototype)
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// clone regexp with all the flags
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var flags = (regexp.global ? 'g' : '')
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+ (regexp.multiline ? 'm' : '')
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+ (regexp.ignoreCase ? 'i' : '')
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self.regexp = RegExp('^' + regexp.source, flags)
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// copy init options
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self.replacer = replacer
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// this plugin can be inserted multiple times,
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// so we're generating unique name for it
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self.id = 'regexp-' + counter
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counter++
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return self
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}
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inherits(Plugin, Function)
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// function that registers plugin with markdown-it
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Plugin.prototype.init = function (md) {
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md.inline.ruler.push(this.id, this.parse.bind(this))
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md.renderer.rules[this.id] = this.render.bind(this)
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}
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Plugin.prototype.parse = function (state, silent) {
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// slowwww... maybe use an advanced regexp engine for this
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var match = this.regexp.exec(state.src.slice(state.pos))
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if (!match) return false
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// valid match found, now we need to advance cursor
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state.pos += match[0].length
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// don't insert any tokens in silent mode
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if (silent) return true
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var token = state.push(this.id, '', 0)
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token.meta = { match: match }
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return true
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}
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Plugin.prototype.render = function (tokens, id, options, env) {
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return this.replacer(tokens[id].meta.match, stuff)
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}
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