Vous ne pouvez pas sélectionner plus de 25 sujets
Les noms de sujets doivent commencer par une lettre ou un nombre, peuvent contenir des tirets ('-') et peuvent comporter jusqu'à 35 caractères.
187 lignes
4.5 KiB
187 lignes
4.5 KiB
/**
|
|
* Module dependencies
|
|
*/
|
|
|
|
var serialize = require('dom-serializer'),
|
|
select = require('css-select'),
|
|
parse = require('./parse'),
|
|
_ = {
|
|
merge: require('lodash.merge'),
|
|
defaults: require('lodash.defaults')
|
|
};
|
|
|
|
/**
|
|
* $.load(str)
|
|
*/
|
|
|
|
exports.load = function(content, options) {
|
|
var Cheerio = require('./cheerio');
|
|
|
|
options = _.defaults(options || {}, Cheerio.prototype.options);
|
|
|
|
var root = parse(content, options);
|
|
|
|
var initialize = function(selector, context, r, opts) {
|
|
if (!(this instanceof initialize)) {
|
|
return new initialize(selector, context, r, opts);
|
|
}
|
|
opts = _.defaults(opts || {}, options);
|
|
return Cheerio.call(this, selector, context, r || root, opts);
|
|
};
|
|
|
|
// Ensure that selections created by the "loaded" `initialize` function are
|
|
// true Cheerio instances.
|
|
initialize.prototype = Object.create(Cheerio.prototype);
|
|
initialize.prototype.constructor = initialize;
|
|
|
|
// Mimic jQuery's prototype alias for plugin authors.
|
|
initialize.fn = initialize.prototype;
|
|
|
|
// Keep a reference to the top-level scope so we can chain methods that implicitly
|
|
// resolve selectors; e.g. $("<span>").(".bar"), which otherwise loses ._root
|
|
initialize.prototype._originalRoot = root;
|
|
|
|
// Add in the static methods
|
|
_.merge(initialize, exports);
|
|
|
|
// Add in the root
|
|
initialize._root = root;
|
|
// store options
|
|
initialize._options = options;
|
|
|
|
return initialize;
|
|
};
|
|
|
|
/*
|
|
* Helper function
|
|
*/
|
|
|
|
function render(that, dom, options) {
|
|
if (!dom) {
|
|
if (that._root && that._root.children) {
|
|
dom = that._root.children;
|
|
} else {
|
|
return '';
|
|
}
|
|
} else if (typeof dom === 'string') {
|
|
dom = select(dom, that._root, options);
|
|
}
|
|
|
|
return serialize(dom, options);
|
|
}
|
|
|
|
/**
|
|
* $.html([selector | dom], [options])
|
|
*/
|
|
|
|
exports.html = function(dom, options) {
|
|
var Cheerio = require('./cheerio');
|
|
|
|
// be flexible about parameters, sometimes we call html(),
|
|
// with options as only parameter
|
|
// check dom argument for dom element specific properties
|
|
// assume there is no 'length' or 'type' properties in the options object
|
|
if (Object.prototype.toString.call(dom) === '[object Object]' && !options && !('length' in dom) && !('type' in dom))
|
|
{
|
|
options = dom;
|
|
dom = undefined;
|
|
}
|
|
|
|
// sometimes $.html() used without preloading html
|
|
// so fallback non existing options to the default ones
|
|
options = _.defaults(options || {}, this._options, Cheerio.prototype.options);
|
|
|
|
return render(this, dom, options);
|
|
};
|
|
|
|
/**
|
|
* $.xml([selector | dom])
|
|
*/
|
|
|
|
exports.xml = function(dom) {
|
|
var options = _.defaults({xmlMode: true}, this._options);
|
|
|
|
return render(this, dom, options);
|
|
};
|
|
|
|
/**
|
|
* $.text(dom)
|
|
*/
|
|
|
|
exports.text = function(elems) {
|
|
if (!elems) {
|
|
elems = this.root();
|
|
}
|
|
|
|
var ret = '',
|
|
len = elems.length,
|
|
elem;
|
|
|
|
for (var i = 0; i < len; i++) {
|
|
elem = elems[i];
|
|
if (elem.type === 'text') ret += elem.data;
|
|
else if (elem.children && elem.type !== 'comment') {
|
|
ret += exports.text(elem.children);
|
|
}
|
|
}
|
|
|
|
return ret;
|
|
};
|
|
|
|
/**
|
|
* $.parseHTML(data [, context ] [, keepScripts ])
|
|
* Parses a string into an array of DOM nodes. The `context` argument has no
|
|
* meaning for Cheerio, but it is maintained for API compatibility with jQuery.
|
|
*/
|
|
exports.parseHTML = function(data, context, keepScripts) {
|
|
var parsed;
|
|
|
|
if (!data || typeof data !== 'string') {
|
|
return null;
|
|
}
|
|
|
|
if (typeof context === 'boolean') {
|
|
keepScripts = context;
|
|
}
|
|
|
|
parsed = this.load(data);
|
|
if (!keepScripts) {
|
|
parsed('script').remove();
|
|
}
|
|
|
|
// The `children` array is used by Cheerio internally to group elements that
|
|
// share the same parents. When nodes created through `parseHTML` are
|
|
// inserted into previously-existing DOM structures, they will be removed
|
|
// from the `children` array. The results of `parseHTML` should remain
|
|
// constant across these operations, so a shallow copy should be returned.
|
|
return parsed.root()[0].children.slice();
|
|
};
|
|
|
|
/**
|
|
* $.root()
|
|
*/
|
|
exports.root = function() {
|
|
return this(this._root);
|
|
};
|
|
|
|
/**
|
|
* $.contains()
|
|
*/
|
|
exports.contains = function(container, contained) {
|
|
|
|
// According to the jQuery API, an element does not "contain" itself
|
|
if (contained === container) {
|
|
return false;
|
|
}
|
|
|
|
// Step up the descendants, stopping when the root element is reached
|
|
// (signaled by `.parent` returning a reference to the same object)
|
|
while (contained && contained !== contained.parent) {
|
|
contained = contained.parent;
|
|
if (contained === container) {
|
|
return true;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
};
|