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