mirror of
https://github.com/gorhill/uMatrix.git
synced 2024-05-20 04:03:13 +12:00
729 lines
20 KiB
JavaScript
729 lines
20 KiB
JavaScript
/*******************************************************************************
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µBlock - a browser extension to block requests.
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Copyright (C) 2014-2017 Raymond Hill
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see {http://www.gnu.org/licenses/}.
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Home: https://github.com/gorhill/uBlock
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*/
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/* global DOMTokenList */
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/* exported uDom */
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'use strict';
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/******************************************************************************/
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// It's just a silly, minimalist DOM framework: this allows me to not rely
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// on jQuery. jQuery contains way too much stuff than I need, and as per
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// Opera rules, I am not allowed to use a cut-down version of jQuery. So
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// the code here does *only* what I need, and nothing more, and with a lot
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// of assumption on passed parameters, etc. I grow it on a per-need-basis only.
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var uDom = (function() {
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/******************************************************************************/
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var DOMList = function() {
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this.nodes = [];
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};
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/******************************************************************************/
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Object.defineProperty(
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DOMList.prototype,
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'length',
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{
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get: function() {
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return this.nodes.length;
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}
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}
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);
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/******************************************************************************/
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var DOMListFactory = function(selector, context) {
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var r = new DOMList();
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if ( typeof selector === 'string' ) {
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selector = selector.trim();
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if ( selector !== '' ) {
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return addSelectorToList(r, selector, context);
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}
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}
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if ( selector instanceof Node ) {
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return addNodeToList(r, selector);
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}
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if ( selector instanceof NodeList ) {
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return addNodeListToList(r, selector);
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}
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if ( selector instanceof DOMList ) {
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return addListToList(r, selector);
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}
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return r;
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};
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/******************************************************************************/
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DOMListFactory.onLoad = function(callback) {
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window.addEventListener('load', callback);
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};
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/******************************************************************************/
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DOMListFactory.nodeFromId = function(id) {
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return document.getElementById(id);
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};
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DOMListFactory.nodeFromSelector = function(selector) {
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return document.querySelector(selector);
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};
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/******************************************************************************/
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var addNodeToList = function(list, node) {
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if ( node ) {
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list.nodes.push(node);
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}
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return list;
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};
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/******************************************************************************/
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var addNodeListToList = function(list, nodelist) {
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if ( nodelist ) {
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var n = nodelist.length;
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for ( var i = 0; i < n; i++ ) {
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list.nodes.push(nodelist[i]);
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}
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}
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return list;
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};
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/******************************************************************************/
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var addListToList = function(list, other) {
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list.nodes = list.nodes.concat(other.nodes);
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return list;
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};
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/******************************************************************************/
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var addSelectorToList = function(list, selector, context) {
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var p = context || document;
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var r = p.querySelectorAll(selector);
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var n = r.length;
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for ( var i = 0; i < n; i++ ) {
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list.nodes.push(r[i]);
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}
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return list;
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};
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/******************************************************************************/
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var nodeInNodeList = function(node, nodeList) {
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var i = nodeList.length;
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while ( i-- ) {
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if ( nodeList[i] === node ) {
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return true;
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}
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}
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return false;
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};
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/******************************************************************************/
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var doesMatchSelector = function(node, selector) {
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if ( !node ) {
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return false;
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}
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if ( node.nodeType !== 1 ) {
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return false;
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}
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if ( selector === undefined ) {
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return true;
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}
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var parentNode = node.parentNode;
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if ( !parentNode || !parentNode.setAttribute ) {
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return false;
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}
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var doesMatch = false;
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parentNode.setAttribute('uDom-32kXc6xEZA7o73AMB8vLbLct1RZOkeoO', '');
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var grandpaNode = parentNode.parentNode || document;
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var nl = grandpaNode.querySelectorAll('[uDom-32kXc6xEZA7o73AMB8vLbLct1RZOkeoO] > ' + selector);
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var i = nl.length;
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while ( doesMatch === false && i-- ) {
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doesMatch = nl[i] === node;
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}
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parentNode.removeAttribute('uDom-32kXc6xEZA7o73AMB8vLbLct1RZOkeoO');
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return doesMatch;
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};
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/******************************************************************************/
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DOMList.prototype.nodeAt = function(i) {
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return this.nodes[i] || null;
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};
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DOMList.prototype.at = function(i) {
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return addNodeToList(new DOMList(), this.nodes[i]);
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};
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/******************************************************************************/
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DOMList.prototype.toArray = function() {
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return this.nodes.slice();
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};
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/******************************************************************************/
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DOMList.prototype.pop = function() {
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return addNodeToList(new DOMList(), this.nodes.pop());
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};
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/******************************************************************************/
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DOMList.prototype.forEach = function(fn) {
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var n = this.nodes.length;
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for ( var i = 0; i < n; i++ ) {
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fn(this.at(i), i);
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}
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return this;
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};
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/******************************************************************************/
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DOMList.prototype.subset = function(i, l) {
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var r = new DOMList();
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var n = l !== undefined ? l : this.nodes.length;
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var j = Math.min(i + n, this.nodes.length);
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if ( i < j ) {
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r.nodes = this.nodes.slice(i, j);
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}
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return r;
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};
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/******************************************************************************/
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DOMList.prototype.first = function() {
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return this.subset(0, 1);
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};
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/******************************************************************************/
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DOMList.prototype.next = function(selector) {
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var r = new DOMList();
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var n = this.nodes.length;
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var node;
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for ( var i = 0; i < n; i++ ) {
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node = this.nodes[i];
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while ( node.nextSibling !== null ) {
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node = node.nextSibling;
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if ( node.nodeType !== 1 ) {
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continue;
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}
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if ( doesMatchSelector(node, selector) === false ) {
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continue;
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}
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addNodeToList(r, node);
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break;
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}
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}
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return r;
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};
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/******************************************************************************/
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DOMList.prototype.parent = function() {
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var r = new DOMList();
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if ( this.nodes.length ) {
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addNodeToList(r, this.nodes[0].parentNode);
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}
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return r;
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};
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/******************************************************************************/
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DOMList.prototype.filter = function(filter) {
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var r = new DOMList();
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var filterFunc;
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if ( typeof filter === 'string' ) {
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filterFunc = function() {
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return doesMatchSelector(this, filter);
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};
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} else if ( typeof filter === 'function' ) {
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filterFunc = filter;
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} else {
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filterFunc = function(){
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return true;
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};
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}
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var n = this.nodes.length;
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var node;
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for ( var i = 0; i < n; i++ ) {
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node = this.nodes[i];
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if ( filterFunc.apply(node) ) {
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addNodeToList(r, node);
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}
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}
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return r;
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};
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/******************************************************************************/
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// TODO: Avoid possible duplicates
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DOMList.prototype.ancestors = function(selector) {
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var r = new DOMList();
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var n = this.nodes.length;
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var node;
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for ( var i = 0; i < n; i++ ) {
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node = this.nodes[i].parentNode;
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while ( node ) {
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if ( doesMatchSelector(node, selector) ) {
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addNodeToList(r, node);
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}
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node = node.parentNode;
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}
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}
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return r;
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};
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/******************************************************************************/
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DOMList.prototype.descendants = function(selector) {
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var r = new DOMList();
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var n = this.nodes.length;
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var nl;
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for ( var i = 0; i < n; i++ ) {
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nl = this.nodes[i].querySelectorAll(selector);
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addNodeListToList(r, nl);
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}
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return r;
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};
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/******************************************************************************/
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DOMList.prototype.contents = function() {
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var r = new DOMList();
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var cnodes, cn, ci;
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var n = this.nodes.length;
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for ( var i = 0; i < n; i++ ) {
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cnodes = this.nodes[i].childNodes;
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cn = cnodes.length;
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for ( ci = 0; ci < cn; ci++ ) {
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addNodeToList(r, cnodes.item(ci));
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}
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}
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return r;
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};
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/******************************************************************************/
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DOMList.prototype.remove = function() {
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var cn, p;
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var i = this.nodes.length;
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while ( i-- ) {
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cn = this.nodes[i];
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if ( (p = cn.parentNode) ) {
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p.removeChild(cn);
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}
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}
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return this;
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};
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DOMList.prototype.detach = DOMList.prototype.remove;
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/******************************************************************************/
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DOMList.prototype.empty = function() {
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var node;
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var i = this.nodes.length;
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while ( i-- ) {
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node = this.nodes[i];
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while ( node.firstChild ) {
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node.removeChild(node.firstChild);
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}
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}
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return this;
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};
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/******************************************************************************/
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DOMList.prototype.append = function(selector, context) {
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var p = this.nodes[0];
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if ( p ) {
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var c = DOMListFactory(selector, context);
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var n = c.nodes.length;
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for ( var i = 0; i < n; i++ ) {
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p.appendChild(c.nodes[i]);
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}
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}
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return this;
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};
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/******************************************************************************/
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DOMList.prototype.prepend = function(selector, context) {
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var p = this.nodes[0];
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if ( p ) {
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var c = DOMListFactory(selector, context);
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var i = c.nodes.length;
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while ( i-- ) {
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p.insertBefore(c.nodes[i], p.firstChild);
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}
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}
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return this;
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};
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/******************************************************************************/
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DOMList.prototype.appendTo = function(selector, context) {
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var p = selector instanceof DOMListFactory ? selector : DOMListFactory(selector, context);
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var n = p.length;
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for ( var i = 0; i < n; i++ ) {
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p.nodes[0].appendChild(this.nodes[i]);
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}
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return this;
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};
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/******************************************************************************/
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DOMList.prototype.insertAfter = function(selector, context) {
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if ( this.nodes.length === 0 ) {
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return this;
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}
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var p = this.nodes[0].parentNode;
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if ( !p ) {
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return this;
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}
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var c = DOMListFactory(selector, context);
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var n = c.nodes.length;
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for ( var i = 0; i < n; i++ ) {
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p.appendChild(c.nodes[i]);
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}
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return this;
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};
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/******************************************************************************/
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DOMList.prototype.insertBefore = function(selector, context) {
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if ( this.nodes.length === 0 ) {
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return this;
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}
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var referenceNodes = DOMListFactory(selector, context);
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if ( referenceNodes.nodes.length === 0 ) {
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return this;
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}
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var referenceNode = referenceNodes.nodes[0];
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var parentNode = referenceNode.parentNode;
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if ( !parentNode ) {
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return this;
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}
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var n = this.nodes.length;
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for ( var i = 0; i < n; i++ ) {
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parentNode.insertBefore(this.nodes[i], referenceNode);
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}
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return this;
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};
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/******************************************************************************/
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DOMList.prototype.clone = function(notDeep) {
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var r = new DOMList();
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var n = this.nodes.length;
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for ( var i = 0; i < n; i++ ) {
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addNodeToList(r, this.nodes[i].cloneNode(!notDeep));
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}
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return r;
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};
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/******************************************************************************/
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DOMList.prototype.nthOfType = function() {
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if ( this.nodes.length === 0 ) {
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return 0;
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}
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var node = this.nodes[0];
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var tagName = node.tagName;
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var i = 1;
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while ( node.previousElementSibling !== null ) {
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node = node.previousElementSibling;
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if ( typeof node.tagName !== 'string' ) {
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continue;
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}
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if ( node.tagName !== tagName ) {
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continue;
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}
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i++;
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}
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return i;
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};
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/******************************************************************************/
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DOMList.prototype.attr = function(attr, value) {
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var i = this.nodes.length;
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if ( value === undefined && typeof attr !== 'object' ) {
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return i ? this.nodes[0].getAttribute(attr) : undefined;
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}
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if ( typeof attr === 'object' ) {
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var attrNames = Object.keys(attr);
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var node, j, attrName;
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while ( i-- ) {
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node = this.nodes[i];
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j = attrNames.length;
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while ( j-- ) {
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attrName = attrNames[j];
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node.setAttribute(attrName, attr[attrName]);
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}
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}
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} else {
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while ( i-- ) {
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this.nodes[i].setAttribute(attr, value);
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}
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}
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return this;
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};
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/******************************************************************************/
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DOMList.prototype.prop = function(prop, value) {
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var i = this.nodes.length;
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if ( value === undefined ) {
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return i !== 0 ? this.nodes[0][prop] : undefined;
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}
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while ( i-- ) {
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this.nodes[i][prop] = value;
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}
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return this;
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};
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/******************************************************************************/
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DOMList.prototype.css = function(prop, value) {
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var i = this.nodes.length;
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if ( value === undefined ) {
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return i ? this.nodes[0].style[prop] : undefined;
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}
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if ( value !== '' ) {
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while ( i-- ) {
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this.nodes[i].style.setProperty(prop, value);
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}
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return this;
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}
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while ( i-- ) {
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this.nodes[i].style.removeProperty(prop);
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}
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return this;
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};
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/******************************************************************************/
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DOMList.prototype.val = function(value) {
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return this.prop('value', value);
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};
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/******************************************************************************/
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DOMList.prototype.html = function(html) {
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var i = this.nodes.length;
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if ( html === undefined ) {
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return i ? this.nodes[0].innerHTML : '';
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}
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while ( i-- ) {
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vAPI.insertHTML(this.nodes[i], html);
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}
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return this;
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};
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/******************************************************************************/
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DOMList.prototype.text = function(text) {
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var i = this.nodes.length;
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if ( text === undefined ) {
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return i ? this.nodes[0].textContent : '';
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}
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while ( i-- ) {
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this.nodes[i].textContent = text;
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}
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return this;
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};
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/******************************************************************************/
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var toggleClass = function(node, className, targetState) {
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var tokenList = node.classList;
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if ( tokenList instanceof DOMTokenList === false ) {
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return;
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}
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var currentState = tokenList.contains(className);
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var newState = targetState;
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if ( newState === undefined ) {
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newState = !currentState;
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}
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if ( newState === currentState ) {
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return;
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}
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tokenList.toggle(className, newState);
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};
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/******************************************************************************/
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DOMList.prototype.hasClass = function(className) {
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if ( !this.nodes.length ) {
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return false;
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}
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var tokenList = this.nodes[0].classList;
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return tokenList instanceof DOMTokenList &&
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tokenList.contains(className);
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};
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DOMList.prototype.hasClassName = DOMList.prototype.hasClass;
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DOMList.prototype.addClass = function(className) {
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return this.toggleClass(className, true);
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};
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DOMList.prototype.removeClass = function(className) {
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if ( className !== undefined ) {
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return this.toggleClass(className, false);
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}
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var i = this.nodes.length;
|
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while ( i-- ) {
|
|
this.nodes[i].className = '';
|
|
}
|
|
return this;
|
|
};
|
|
|
|
/******************************************************************************/
|
|
|
|
DOMList.prototype.toggleClass = function(className, targetState) {
|
|
if ( className.indexOf(' ') !== -1 ) {
|
|
return this.toggleClasses(className, targetState);
|
|
}
|
|
var i = this.nodes.length;
|
|
while ( i-- ) {
|
|
toggleClass(this.nodes[i], className, targetState);
|
|
}
|
|
return this;
|
|
};
|
|
|
|
/******************************************************************************/
|
|
|
|
DOMList.prototype.toggleClasses = function(classNames, targetState) {
|
|
var tokens = classNames.split(/\s+/);
|
|
var i = this.nodes.length;
|
|
var node, j;
|
|
while ( i-- ) {
|
|
node = this.nodes[i];
|
|
j = tokens.length;
|
|
while ( j-- ) {
|
|
toggleClass(node, tokens[j], targetState);
|
|
}
|
|
}
|
|
return this;
|
|
};
|
|
|
|
/******************************************************************************/
|
|
|
|
var listenerEntries = [];
|
|
|
|
var ListenerEntry = function(target, type, capture, callback) {
|
|
this.target = target;
|
|
this.type = type;
|
|
this.capture = capture;
|
|
this.callback = callback;
|
|
target.addEventListener(type, callback, capture);
|
|
};
|
|
|
|
ListenerEntry.prototype.dispose = function() {
|
|
this.target.removeEventListener(this.type, this.callback, this.capture);
|
|
this.target = null;
|
|
this.callback = null;
|
|
};
|
|
|
|
/******************************************************************************/
|
|
|
|
var makeEventHandler = function(selector, callback) {
|
|
return function(event) {
|
|
var dispatcher = event.currentTarget;
|
|
if ( !dispatcher || typeof dispatcher.querySelectorAll !== 'function' ) {
|
|
return;
|
|
}
|
|
var receiver = event.target;
|
|
if ( nodeInNodeList(receiver, dispatcher.querySelectorAll(selector)) ) {
|
|
callback.call(receiver, event);
|
|
}
|
|
};
|
|
};
|
|
|
|
DOMList.prototype.on = function(etype, selector, callback) {
|
|
if ( typeof selector === 'function' ) {
|
|
callback = selector;
|
|
selector = undefined;
|
|
} else {
|
|
callback = makeEventHandler(selector, callback);
|
|
}
|
|
|
|
var i = this.nodes.length;
|
|
while ( i-- ) {
|
|
listenerEntries.push(new ListenerEntry(this.nodes[i], etype, selector !== undefined, callback));
|
|
}
|
|
return this;
|
|
};
|
|
|
|
/******************************************************************************/
|
|
|
|
// TODO: Won't work for delegated handlers. Need to figure
|
|
// what needs to be done.
|
|
|
|
DOMList.prototype.off = function(evtype, callback) {
|
|
var i = this.nodes.length;
|
|
while ( i-- ) {
|
|
this.nodes[i].removeEventListener(evtype, callback);
|
|
}
|
|
return this;
|
|
};
|
|
|
|
/******************************************************************************/
|
|
|
|
DOMList.prototype.trigger = function(etype) {
|
|
var ev = new CustomEvent(etype);
|
|
var i = this.nodes.length;
|
|
while ( i-- ) {
|
|
this.nodes[i].dispatchEvent(ev);
|
|
}
|
|
return this;
|
|
};
|
|
|
|
/******************************************************************************/
|
|
|
|
// Cleanup
|
|
|
|
var onBeforeUnload = function() {
|
|
var entry;
|
|
while ( (entry = listenerEntries.pop()) ) {
|
|
entry.dispose();
|
|
}
|
|
window.removeEventListener('beforeunload', onBeforeUnload);
|
|
};
|
|
|
|
window.addEventListener('beforeunload', onBeforeUnload);
|
|
|
|
/******************************************************************************/
|
|
|
|
return DOMListFactory;
|
|
|
|
})();
|