مشاهدة ملف: legacy.js

"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_js_1 = require("./querying.js");
/**
 * A map of functions to check nodes against.
 */
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; };
    },
};
/**
 * Returns a function to check whether a node has an attribute with a particular
 * value.
 *
 * @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; };
}
/**
 * Returns a function that returns `true` if either of the input functions
 * returns `true` for a node.
 *
 * @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); };
}
/**
 * Returns a function that executes all checks in `options` and returns `true`
 * if any of them match a node.
 *
 * @param options An object describing nodes to look for.
 * @returns A function that executes all checks in `options` and returns `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);
}
/**
 * Checks whether a node matches the description in `options`.
 *
 * @category Legacy Query Functions
 * @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;
/**
 * Returns all nodes that match `options`.
 *
 * @category Legacy Query Functions
 * @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_js_1.filter)(test, nodes, recurse, limit) : [];
}
exports.getElements = getElements;
/**
 * Returns the node with the supplied ID.
 *
 * @category Legacy Query Functions
 * @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_js_1.findOne)(getAttribCheck("id", id), nodes, recurse);
}
exports.getElementById = getElementById;
/**
 * Returns all nodes with the supplied `tagName`.
 *
 * @category Legacy Query Functions
 * @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_js_1.filter)(Checks["tag_name"](tagName), nodes, recurse, limit);
}
exports.getElementsByTagName = getElementsByTagName;
/**
 * Returns all nodes with the supplied `type`.
 *
 * @category Legacy Query Functions
 * @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_js_1.filter)(Checks["tag_type"](type), nodes, recurse, limit);
}
exports.getElementsByTagType = getElementsByTagType;
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