157 lines
3.6 KiB
JavaScript
157 lines
3.6 KiB
JavaScript
/**
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* Module dependencies
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*/
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var select = require('CSSselect'),
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parse = require('./parse'),
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render = require('dom-serializer'),
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_ = require('lodash');
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/**
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* $.load(str)
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*/
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var load = exports.load = function(content, options) {
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var Cheerio = require('./cheerio');
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options = _.defaults(options || {}, Cheerio.prototype.options);
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var root = parse(content, options);
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var initialize = function(selector, context, r, opts) {
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opts = _.defaults(opts || {}, options);
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return new Cheerio(selector, context, r || root, opts);
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};
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// Add in the static methods
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initialize.__proto__ = exports;
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// Add in the root
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initialize._root = root;
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// store options
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initialize._options = options;
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return initialize;
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};
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/**
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* $.html([selector | dom])
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*/
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var html = exports.html = function(dom, options) {
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var Cheerio = require('./cheerio');
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// be flexible about parameters, sometimes we call html(),
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// with options as only parameter
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// check dom argument for dom element specific properties
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// assume there is no 'length' or 'type' properties in the options object
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if (Object.prototype.toString.call(dom) === '[object Object]' && !options && !('length' in dom) && !('type' in dom))
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{
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options = dom;
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dom = undefined;
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}
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// sometimes $.html() used without preloading html
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// so fallback non existing options to the default ones
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options = _.defaults(options || {}, this._options, Cheerio.prototype.options);
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if (dom) {
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dom = (typeof dom === 'string') ? select(dom, this._root, options) : dom;
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return render(dom, options);
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} else if (this._root && this._root.children) {
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return render(this._root.children, options);
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} else {
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return '';
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}
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};
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/**
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* $.xml([selector | dom])
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*/
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var xml = exports.xml = function(dom) {
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if (dom) {
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dom = (typeof dom === 'string') ? select(dom, this._root, this.options) : dom;
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return render(dom, { xmlMode: true });
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} else if (this._root && this._root.children) {
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return render(this._root.children, { xmlMode: true });
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} else {
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return '';
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}
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};
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/**
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* $.text(dom)
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*/
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var text = exports.text = function(elems) {
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if (!elems) return '';
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var ret = '',
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len = elems.length,
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elem;
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for (var i = 0; i < len; i ++) {
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elem = elems[i];
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if (elem.type === 'text') ret += elem.data;
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else if (elem.children && elem.type !== 'comment') {
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ret += text(elem.children);
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}
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}
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return ret;
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};
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/**
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* $.parseHTML(data [, context ] [, keepScripts ])
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* Parses a string into an array of DOM nodes. The `context` argument has no
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* meaning for Cheerio, but it is maintained for API compatibility with jQuery.
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*/
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var parseHTML = exports.parseHTML = function(data, context, keepScripts) {
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var parsed;
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if (!data || typeof data !== 'string') {
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return null;
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}
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if (typeof context === 'boolean') {
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keepScripts = context;
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}
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parsed = this.load(data);
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if (!keepScripts) {
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parsed('script').remove();
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}
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return parsed.root()[0].children;
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};
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/**
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* $.root()
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*/
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var root = exports.root = function() {
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return this(this._root);
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};
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/**
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* $.contains()
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*/
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var contains = exports.contains = function(container, contained) {
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// According to the jQuery API, an element does not "contain" itself
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if (contained === container) {
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return false;
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}
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// Step up the descendants, stopping when the root element is reached
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// (signaled by `.parent` returning a reference to the same object)
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while (contained && contained !== contained.parent) {
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contained = contained.parent;
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if (contained === container) {
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return true;
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}
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}
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return false;
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};
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