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/*
Module dependencies
*/
var parse = require('./parse'),
isHtml = require('./utils').isHtml,
_ = {
extend: require('lodash.assignin'),
bind: require('lodash.bind'),
forEach: require('lodash.foreach'),
defaults: require('lodash.defaults')
};
/*
* The API
*/
var api = [
require('./api/attributes'),
require('./api/traversing'),
require('./api/manipulation'),
require('./api/css'),
require('./api/forms')
];
/*
* Instance of cheerio
*/
var Cheerio = module.exports = function(selector, context, root, options) {
if (!(this instanceof Cheerio)) return new Cheerio(selector, context, root, options);
this.options = _.defaults(options || {}, this.options);
// $(), $(null), $(undefined), $(false)
if (!selector) return this;
if (root) {
if (typeof root === 'string') root = parse(root, this.options);
this._root = Cheerio.call(this, root);
}
// $($)
if (selector.cheerio) return selector;
// $(dom)
if (isNode(selector))
selector = [selector];
// $([dom])
if (Array.isArray(selector)) {
_.forEach(selector, _.bind(function(elem, idx) {
this[idx] = elem;
}, this));
this.length = selector.length;
return this;
}
// $(<html>)
if (typeof selector === 'string' && isHtml(selector)) {
return Cheerio.call(this, parse(selector, this.options).children);
}
// If we don't have a context, maybe we have a root, from loading
if (!context) {
context = this._root;
} else if (typeof context === 'string') {
if (isHtml(context)) {
// $('li', '<ul>...</ul>')
context = parse(context, this.options);
context = Cheerio.call(this, context);
} else {
// $('li', 'ul')
selector = [context, selector].join(' ');
context = this._root;
}
// $('li', node), $('li', [nodes])
} else if (!context.cheerio) {
context = Cheerio.call(this, context);
}
// If we still don't have a context, return
if (!context) return this;
// #id, .class, tag
return context.find(selector);
};
/**
* Mix in `static`
*/
_.extend(Cheerio, require('./static'));
/*
* Set a signature of the object
*/
Cheerio.prototype.cheerio = '[cheerio object]';
/*
* Cheerio default options
*/
Cheerio.prototype.options = {
withDomLvl1: true,
normalizeWhitespace: false,
xmlMode: false,
decodeEntities: true
};
/*
* Make cheerio an array-like object
*/
Cheerio.prototype.length = 0;
Cheerio.prototype.splice = Array.prototype.splice;
/*
* Make a cheerio object
*
* @api private
*/
Cheerio.prototype._make = function(dom, context) {
var cheerio = new this.constructor(dom, context, this._root, this.options);
cheerio.prevObject = this;
return cheerio;
};
/**
* Turn a cheerio object into an array
*/
Cheerio.prototype.toArray = function() {
return this.get();
};
/**
* Plug in the API
*/
api.forEach(function(mod) {
_.extend(Cheerio.prototype, mod);
});
var isNode = function(obj) {
return obj.name || obj.type === 'text' || obj.type === 'comment';
};