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/*!
* DOM Selector - A CSS selector engine.
* @license MIT
* @copyright asamuzaK (Kazz)
* @see {@link https://github.com/asamuzaK/domSelector/blob/main/LICENSE}
*/
/* import */
import { LRUCache } from 'lru-cache';
import { Finder } from './js/finder.js';
import { filterSelector, getType, initNwsapi } from './js/utility.js';
/* constants */
import {
DOCUMENT_NODE,
DOCUMENT_FRAGMENT_NODE,
ELEMENT_NODE,
TARGET_ALL,
TARGET_FIRST,
TARGET_LINEAL,
TARGET_SELF
} from './js/constant.js';
const MAX_CACHE = 1024;
/**
* @typedef {object} CheckResult
* @property {boolean} match - The match result.
* @property {string?} pseudoElement - The pseudo-element, if any.
*/
/* DOMSelector */
export class DOMSelector {
/* private fields */
#window;
#document;
#finder;
#idlUtils;
#nwsapi;
#cache;
/**
* Creates an instance of DOMSelector.
* @param {Window} window - The window object.
* @param {Document} document - The document object.
* @param {object} [opt] - Options.
*/
constructor(window, document, opt = {}) {
const { idlUtils } = opt;
this.#window = window;
this.#document = document ?? window.document;
this.#finder = new Finder(window);
this.#idlUtils = idlUtils;
this.#nwsapi = initNwsapi(window, document);
this.#cache = new LRUCache({
max: MAX_CACHE
});
}
/**
* Clears the internal cache of finder results.
* @returns {void}
*/
clear = () => {
this.#finder.clearResults(true);
};
/**
* Checks if an element matches a CSS selector.
* @param {string} selector - The CSS selector to check against.
* @param {Element} node - The element node to check.
* @param {object} [opt] - Optional parameters.
* @returns {CheckResult} An object containing the check result.
*/
check = (selector, node, opt = {}) => {
if (!node?.nodeType) {
const e = new this.#window.TypeError(`Unexpected type ${getType(node)}`);
return this.#finder.onError(e, opt);
} else if (node.nodeType !== ELEMENT_NODE) {
const e = new this.#window.TypeError(`Unexpected node ${node.nodeName}`);
return this.#finder.onError(e, opt);
}
const document = node.ownerDocument;
if (
document === this.#document &&
document.contentType === 'text/html' &&
document.documentElement &&
node.parentNode
) {
const cacheKey = `check_${selector}`;
let filterMatches = false;
if (this.#cache.has(cacheKey)) {
filterMatches = this.#cache.get(cacheKey);
} else {
filterMatches = filterSelector(selector, TARGET_SELF);
this.#cache.set(cacheKey, filterMatches);
}
if (filterMatches) {
try {
const n = this.#idlUtils ? this.#idlUtils.wrapperForImpl(node) : node;
const match = this.#nwsapi.match(selector, n);
return {
match,
pseudoElement: null
};
} catch (e) {
// fall through
}
}
}
let res;
try {
if (this.#idlUtils) {
node = this.#idlUtils.wrapperForImpl(node);
}
opt.check = true;
opt.noexept = true;
opt.warn = false;
this.#finder.setup(selector, node, opt);
res = this.#finder.find(TARGET_SELF);
} catch (e) {
this.#finder.onError(e, opt);
}
return res;
};
/**
* Returns true if the element matches the selector.
* @param {string} selector - The CSS selector to match against.
* @param {Element} node - The element node to test.
* @param {object} [opt] - Optional parameters.
* @returns {boolean} `true` if the element matches, or `false` otherwise.
*/
matches = (selector, node, opt = {}) => {
if (!node?.nodeType) {
const e = new this.#window.TypeError(`Unexpected type ${getType(node)}`);
return this.#finder.onError(e, opt);
} else if (node.nodeType !== ELEMENT_NODE) {
const e = new this.#window.TypeError(`Unexpected node ${node.nodeName}`);
return this.#finder.onError(e, opt);
}
const document = node.ownerDocument;
if (
document === this.#document &&
document.contentType === 'text/html' &&
document.documentElement &&
node.parentNode
) {
const cacheKey = `matches_${selector}`;
let filterMatches = false;
if (this.#cache.has(cacheKey)) {
filterMatches = this.#cache.get(cacheKey);
} else {
filterMatches = filterSelector(selector, TARGET_SELF);
this.#cache.set(cacheKey, filterMatches);
}
if (filterMatches) {
try {
const n = this.#idlUtils ? this.#idlUtils.wrapperForImpl(node) : node;
const res = this.#nwsapi.match(selector, n);
return res;
} catch (e) {
// fall through
}
}
}
let res;
try {
if (this.#idlUtils) {
node = this.#idlUtils.wrapperForImpl(node);
}
this.#finder.setup(selector, node, opt);
const nodes = this.#finder.find(TARGET_SELF);
res = nodes.size;
} catch (e) {
this.#finder.onError(e, opt);
}
return !!res;
};
/**
* Traverses up the DOM tree to find the first node that matches the selector.
* @param {string} selector - The CSS selector to match against.
* @param {Element} node - The element from which to start traversing.
* @param {object} [opt] - Optional parameters.
* @returns {?Element} The first matching ancestor element, or `null`.
*/
closest = (selector, node, opt = {}) => {
if (!node?.nodeType) {
const e = new this.#window.TypeError(`Unexpected type ${getType(node)}`);
return this.#finder.onError(e, opt);
} else if (node.nodeType !== ELEMENT_NODE) {
const e = new this.#window.TypeError(`Unexpected node ${node.nodeName}`);
return this.#finder.onError(e, opt);
}
const document = node.ownerDocument;
if (
document === this.#document &&
document.contentType === 'text/html' &&
document.documentElement &&
node.parentNode
) {
const cacheKey = `closest_${selector}`;
let filterMatches = false;
if (this.#cache.has(cacheKey)) {
filterMatches = this.#cache.get(cacheKey);
} else {
filterMatches = filterSelector(selector, TARGET_LINEAL);
this.#cache.set(cacheKey, filterMatches);
}
if (filterMatches) {
try {
const n = this.#idlUtils ? this.#idlUtils.wrapperForImpl(node) : node;
const res = this.#nwsapi.closest(selector, n);
return res;
} catch (e) {
// fall through
}
}
}
let res;
try {
if (this.#idlUtils) {
node = this.#idlUtils.wrapperForImpl(node);
}
this.#finder.setup(selector, node, opt);
const nodes = this.#finder.find(TARGET_LINEAL);
if (nodes.size) {
let refNode = node;
while (refNode) {
if (nodes.has(refNode)) {
res = refNode;
break;
}
refNode = refNode.parentNode;
}
}
} catch (e) {
this.#finder.onError(e, opt);
}
return res ?? null;
};
/**
* Returns the first element within the subtree that matches the selector.
* @param {string} selector - The CSS selector to match.
* @param {Document|DocumentFragment|Element} node - The node to find within.
* @param {object} [opt] - Optional parameters.
* @returns {?Element} The first matching element, or `null`.
*/
querySelector = (selector, node, opt = {}) => {
if (!node?.nodeType) {
const e = new this.#window.TypeError(`Unexpected type ${getType(node)}`);
return this.#finder.onError(e, opt);
}
/*
const document =
node.nodeType === DOCUMENT_NODE ? node : node.ownerDocument;
if (
document === this.#document &&
document.contentType === 'text/html' &&
document.documentElement &&
(node.nodeType !== DOCUMENT_FRAGMENT_NODE || !node.host)
) {
const cacheKey = `querySelector_${selector}`;
let filterMatches = false;
if (this.#cache.has(cacheKey)) {
filterMatches = this.#cache.get(cacheKey);
} else {
filterMatches = filterSelector(selector, TARGET_FIRST);
this.#cache.set(cacheKey, filterMatches);
}
if (filterMatches) {
try {
const n = this.#idlUtils ? this.#idlUtils.wrapperForImpl(node) : node;
const res = this.#nwsapi.first(selector, n);
return res;
} catch (e) {
// fall through
}
}
}
*/
let res;
try {
if (this.#idlUtils) {
node = this.#idlUtils.wrapperForImpl(node);
}
this.#finder.setup(selector, node, opt);
const nodes = this.#finder.find(TARGET_FIRST);
if (nodes.size) {
[res] = [...nodes];
}
} catch (e) {
this.#finder.onError(e, opt);
}
return res ?? null;
};
/**
* Returns an array of elements within the subtree that match the selector.
* Note: This method returns an Array, not a NodeList.
* @param {string} selector - The CSS selector to match.
* @param {Document|DocumentFragment|Element} node - The node to find within.
* @param {object} [opt] - Optional parameters.
* @returns {Array<Element>} An array of elements, or an empty array.
*/
querySelectorAll = (selector, node, opt = {}) => {
if (!node?.nodeType) {
const e = new this.#window.TypeError(`Unexpected type ${getType(node)}`);
return this.#finder.onError(e, opt);
}
const document =
node.nodeType === DOCUMENT_NODE ? node : node.ownerDocument;
if (
document === this.#document &&
document.contentType === 'text/html' &&
document.documentElement &&
(node.nodeType !== DOCUMENT_FRAGMENT_NODE || !node.host)
) {
const cacheKey = `querySelectorAll_${selector}`;
let filterMatches = false;
if (this.#cache.has(cacheKey)) {
filterMatches = this.#cache.get(cacheKey);
} else {
filterMatches = filterSelector(selector, TARGET_ALL);
this.#cache.set(cacheKey, filterMatches);
}
if (filterMatches) {
try {
const n = this.#idlUtils ? this.#idlUtils.wrapperForImpl(node) : node;
const res = this.#nwsapi.select(selector, n);
return res;
} catch (e) {
// fall through
}
}
}
let res;
try {
if (this.#idlUtils) {
node = this.#idlUtils.wrapperForImpl(node);
}
this.#finder.setup(selector, node, opt);
const nodes = this.#finder.find(TARGET_ALL);
if (nodes.size) {
res = [...nodes];
}
} catch (e) {
this.#finder.onError(e, opt);
}
return res ?? [];
};
}
|
