125 lines
		
	
	
	
		
			4.7 KiB
		
	
	
	
		
			JavaScript
		
	
	
	
	
	
		
		
			
		
	
	
			125 lines
		
	
	
	
		
			4.7 KiB
		
	
	
	
		
			JavaScript
		
	
	
	
	
	
|  | "use strict"; | ||
|  | Object.defineProperty(exports, "__esModule", { value: true }); | ||
|  | exports.getElementsByTagType = exports.getElementsByTagName = exports.getElementById = exports.getElements = exports.testElement = void 0; | ||
|  | var domhandler_1 = require("domhandler"); | ||
|  | var querying_1 = require("./querying"); | ||
|  | var Checks = { | ||
|  |     tag_name: function (name) { | ||
|  |         if (typeof name === "function") { | ||
|  |             return function (elem) { return (0, domhandler_1.isTag)(elem) && name(elem.name); }; | ||
|  |         } | ||
|  |         else if (name === "*") { | ||
|  |             return domhandler_1.isTag; | ||
|  |         } | ||
|  |         return function (elem) { return (0, domhandler_1.isTag)(elem) && elem.name === name; }; | ||
|  |     }, | ||
|  |     tag_type: function (type) { | ||
|  |         if (typeof type === "function") { | ||
|  |             return function (elem) { return type(elem.type); }; | ||
|  |         } | ||
|  |         return function (elem) { return elem.type === type; }; | ||
|  |     }, | ||
|  |     tag_contains: function (data) { | ||
|  |         if (typeof data === "function") { | ||
|  |             return function (elem) { return (0, domhandler_1.isText)(elem) && data(elem.data); }; | ||
|  |         } | ||
|  |         return function (elem) { return (0, domhandler_1.isText)(elem) && elem.data === data; }; | ||
|  |     }, | ||
|  | }; | ||
|  | /** | ||
|  |  * @param attrib Attribute to check. | ||
|  |  * @param value Attribute value to look for. | ||
|  |  * @returns A function to check whether the a node has an attribute with a particular value. | ||
|  |  */ | ||
|  | function getAttribCheck(attrib, value) { | ||
|  |     if (typeof value === "function") { | ||
|  |         return function (elem) { return (0, domhandler_1.isTag)(elem) && value(elem.attribs[attrib]); }; | ||
|  |     } | ||
|  |     return function (elem) { return (0, domhandler_1.isTag)(elem) && elem.attribs[attrib] === value; }; | ||
|  | } | ||
|  | /** | ||
|  |  * @param a First function to combine. | ||
|  |  * @param b Second function to combine. | ||
|  |  * @returns A function taking a node and returning `true` if either | ||
|  |  * of the input functions returns `true` for the node. | ||
|  |  */ | ||
|  | function combineFuncs(a, b) { | ||
|  |     return function (elem) { return a(elem) || b(elem); }; | ||
|  | } | ||
|  | /** | ||
|  |  * @param options An object describing nodes to look for. | ||
|  |  * @returns A function executing all checks in `options` and returning `true` | ||
|  |  * if any of them match a node. | ||
|  |  */ | ||
|  | function compileTest(options) { | ||
|  |     var funcs = Object.keys(options).map(function (key) { | ||
|  |         var value = options[key]; | ||
|  |         return Object.prototype.hasOwnProperty.call(Checks, key) | ||
|  |             ? Checks[key](value) | ||
|  |             : getAttribCheck(key, value); | ||
|  |     }); | ||
|  |     return funcs.length === 0 ? null : funcs.reduce(combineFuncs); | ||
|  | } | ||
|  | /** | ||
|  |  * @param options An object describing nodes to look for. | ||
|  |  * @param node The element to test. | ||
|  |  * @returns Whether the element matches the description in `options`. | ||
|  |  */ | ||
|  | function testElement(options, node) { | ||
|  |     var test = compileTest(options); | ||
|  |     return test ? test(node) : true; | ||
|  | } | ||
|  | exports.testElement = testElement; | ||
|  | /** | ||
|  |  * @param options An object describing nodes to look for. | ||
|  |  * @param nodes Nodes to search through. | ||
|  |  * @param recurse Also consider child nodes. | ||
|  |  * @param limit Maximum number of nodes to return. | ||
|  |  * @returns All nodes that match `options`. | ||
|  |  */ | ||
|  | function getElements(options, nodes, recurse, limit) { | ||
|  |     if (limit === void 0) { limit = Infinity; } | ||
|  |     var test = compileTest(options); | ||
|  |     return test ? (0, querying_1.filter)(test, nodes, recurse, limit) : []; | ||
|  | } | ||
|  | exports.getElements = getElements; | ||
|  | /** | ||
|  |  * @param id The unique ID attribute value to look for. | ||
|  |  * @param nodes Nodes to search through. | ||
|  |  * @param recurse Also consider child nodes. | ||
|  |  * @returns The node with the supplied ID. | ||
|  |  */ | ||
|  | function getElementById(id, nodes, recurse) { | ||
|  |     if (recurse === void 0) { recurse = true; } | ||
|  |     if (!Array.isArray(nodes)) | ||
|  |         nodes = [nodes]; | ||
|  |     return (0, querying_1.findOne)(getAttribCheck("id", id), nodes, recurse); | ||
|  | } | ||
|  | exports.getElementById = getElementById; | ||
|  | /** | ||
|  |  * @param tagName Tag name to search for. | ||
|  |  * @param nodes Nodes to search through. | ||
|  |  * @param recurse Also consider child nodes. | ||
|  |  * @param limit Maximum number of nodes to return. | ||
|  |  * @returns All nodes with the supplied `tagName`. | ||
|  |  */ | ||
|  | function getElementsByTagName(tagName, nodes, recurse, limit) { | ||
|  |     if (recurse === void 0) { recurse = true; } | ||
|  |     if (limit === void 0) { limit = Infinity; } | ||
|  |     return (0, querying_1.filter)(Checks.tag_name(tagName), nodes, recurse, limit); | ||
|  | } | ||
|  | exports.getElementsByTagName = getElementsByTagName; | ||
|  | /** | ||
|  |  * @param type Element type to look for. | ||
|  |  * @param nodes Nodes to search through. | ||
|  |  * @param recurse Also consider child nodes. | ||
|  |  * @param limit Maximum number of nodes to return. | ||
|  |  * @returns All nodes with the supplied `type`. | ||
|  |  */ | ||
|  | function getElementsByTagType(type, nodes, recurse, limit) { | ||
|  |     if (recurse === void 0) { recurse = true; } | ||
|  |     if (limit === void 0) { limit = Infinity; } | ||
|  |     return (0, querying_1.filter)(Checks.tag_type(type), nodes, recurse, limit); | ||
|  | } | ||
|  | exports.getElementsByTagType = getElementsByTagType; |