123 lines
5.1 KiB
JavaScript
123 lines
5.1 KiB
JavaScript
import { flattenOptions, } from './options.js';
|
|
import * as staticMethods from './static.js';
|
|
import { Cheerio } from './cheerio.js';
|
|
import { isHtml, isCheerio } from './utils.js';
|
|
export function getLoad(parse, render) {
|
|
/**
|
|
* Create a querying function, bound to a document created from the provided
|
|
* markup.
|
|
*
|
|
* Note that similar to web browser contexts, this operation may introduce
|
|
* `<html>`, `<head>`, and `<body>` elements; set `isDocument` to `false` to
|
|
* switch to fragment mode and disable this.
|
|
*
|
|
* @param content - Markup to be loaded.
|
|
* @param options - Options for the created instance.
|
|
* @param isDocument - Allows parser to be switched to fragment mode.
|
|
* @returns The loaded document.
|
|
* @see {@link https://cheerio.js.org#loading} for additional usage information.
|
|
*/
|
|
return function load(content, options, isDocument = true) {
|
|
if (content == null) {
|
|
throw new Error('cheerio.load() expects a string');
|
|
}
|
|
const internalOpts = flattenOptions(options);
|
|
const initialRoot = parse(content, internalOpts, isDocument, null);
|
|
/**
|
|
* Create an extended class here, so that extensions only live on one
|
|
* instance.
|
|
*/
|
|
class LoadedCheerio extends Cheerio {
|
|
_make(selector, context) {
|
|
const cheerio = initialize(selector, context);
|
|
cheerio.prevObject = this;
|
|
return cheerio;
|
|
}
|
|
_parse(content, options, isDocument, context) {
|
|
return parse(content, options, isDocument, context);
|
|
}
|
|
_render(dom) {
|
|
return render(dom, this.options);
|
|
}
|
|
}
|
|
function initialize(selector, context, root = initialRoot, opts) {
|
|
// $($)
|
|
if (selector && isCheerio(selector))
|
|
return selector;
|
|
const options = flattenOptions(opts, internalOpts);
|
|
const r = typeof root === 'string'
|
|
? [parse(root, options, false, null)]
|
|
: 'length' in root
|
|
? root
|
|
: [root];
|
|
const rootInstance = isCheerio(r)
|
|
? r
|
|
: new LoadedCheerio(r, null, options);
|
|
// Add a cyclic reference, so that calling methods on `_root` never fails.
|
|
rootInstance._root = rootInstance;
|
|
// $(), $(null), $(undefined), $(false)
|
|
if (!selector) {
|
|
return new LoadedCheerio(undefined, rootInstance, options);
|
|
}
|
|
const elements = typeof selector === 'string' && isHtml(selector)
|
|
? // $(<html>)
|
|
parse(selector, options, false, null).children
|
|
: isNode(selector)
|
|
? // $(dom)
|
|
[selector]
|
|
: Array.isArray(selector)
|
|
? // $([dom])
|
|
selector
|
|
: undefined;
|
|
const instance = new LoadedCheerio(elements, rootInstance, options);
|
|
if (elements) {
|
|
return instance;
|
|
}
|
|
if (typeof selector !== 'string') {
|
|
throw new TypeError('Unexpected type of selector');
|
|
}
|
|
// We know that our selector is a string now.
|
|
let search = selector;
|
|
const searchContext = context
|
|
? // If we don't have a context, maybe we have a root, from loading
|
|
typeof context === 'string'
|
|
? isHtml(context)
|
|
? // $('li', '<ul>...</ul>')
|
|
new LoadedCheerio([parse(context, options, false, null)], rootInstance, options)
|
|
: // $('li', 'ul')
|
|
((search = `${context} ${search}`), rootInstance)
|
|
: isCheerio(context)
|
|
? // $('li', $)
|
|
context
|
|
: // $('li', node), $('li', [nodes])
|
|
new LoadedCheerio(Array.isArray(context) ? context : [context], rootInstance, options)
|
|
: rootInstance;
|
|
// If we still don't have a context, return
|
|
if (!searchContext)
|
|
return instance;
|
|
/*
|
|
* #id, .class, tag
|
|
*/
|
|
return searchContext.find(search);
|
|
}
|
|
// Add in static methods & properties
|
|
Object.assign(initialize, staticMethods, {
|
|
load,
|
|
// `_root` and `_options` are used in static methods.
|
|
_root: initialRoot,
|
|
_options: internalOpts,
|
|
// Add `fn` for plugins
|
|
fn: LoadedCheerio.prototype,
|
|
// Add the prototype here to maintain `instanceof` behavior.
|
|
prototype: LoadedCheerio.prototype,
|
|
});
|
|
return initialize;
|
|
};
|
|
}
|
|
function isNode(obj) {
|
|
return (!!obj.name ||
|
|
obj.type === 'root' ||
|
|
obj.type === 'text' ||
|
|
obj.type === 'comment');
|
|
}
|
|
//# sourceMappingURL=load.js.map
|