mirror of https://github.com/gorhill/uBlock.git
497 lines
14 KiB
JavaScript
497 lines
14 KiB
JavaScript
/*******************************************************************************
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µBlock - a Chromium browser extension to block requests.
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Copyright (C) 2014 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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/******************************************************************************/
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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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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.charAt(0) === '<' ) {
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return addHTMLToList(r, selector);
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}
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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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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 i = r.length;
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while ( 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 pTagOfChildTag = {
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'tr': 'table',
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'option': 'select'
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};
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var addHTMLToList = function(list, html) {
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var matches = html.match(/^<([a-z]+)/);
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if ( !matches || matches.length !== 2 ) {
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return this;
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}
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var cTag = matches[1];
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var pTag = pTagOfChildTag[cTag] || 'div';
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var p = document.createElement(pTag);
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p.innerHTML = html;
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// Find real parent
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var c = p.querySelector(cTag);
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p = c.parentNode;
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while ( p.firstChild ) {
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list.nodes.push(p.removeChild(p.firstChild));
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}
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return list;
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};
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/******************************************************************************/
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DOMList.prototype.length = function() {
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return this.nodes.length;
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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 : 1;
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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);
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};
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/******************************************************************************/
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DOMList.prototype.node = function(i) {
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return this.nodes[i];
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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.find = 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.forEach = function(callback) {
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var n = this.nodes.length;
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for ( var i = 0; i < n; i++ ) {
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callback.bind(this.nodes[i]).call();
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}
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return this;
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};
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/******************************************************************************/
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DOMList.prototype.remove = function() {
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var n = this.nodes.length;
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var c, p;
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for ( var i = 0; i < n; i++ ) {
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c = this.nodes[i];
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if ( p = c.parentNode ) {
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p.removeChild(c);
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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.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 = DOMListFactory(selector, context);
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if ( p.length ) {
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var n = this.nodes.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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}
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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.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.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 ? 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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while ( i-- ) {
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this.nodes[i].style[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.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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this.nodes[i].innerHTML = 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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DOMList.prototype.hasClassName = 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 re = new RegExp('(^| )' + className + '( |$)');
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return re.test(this.nodes[0].className);
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};
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DOMList.prototype.addClass = function(className) {
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return this.toggleClass(className, true);
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};
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DOMList.prototype.removeClass = function(className) {
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if ( className !== undefined ) {
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return this.toggleClass(className, false);
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}
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var i = this.nodes.length;
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while ( i-- ) {
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this.nodes[i].className = '';
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}
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return this;
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};
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DOMList.prototype.toggleClass = function(className, targetState) {
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var re = new RegExp('(^| )' + className + '( |$)');
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var n = this.nodes.length;
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var node, currentState, newState, newClassName;
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for ( var i = 0; i < n; i++ ) {
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node = this.nodes[i];
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currentState = re.test(node.className);
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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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continue;
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}
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newClassName = node.className;
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if ( newState ) {
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newClassName += ' ' + className;
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} else {
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newClassName = newClassName.replace(re, ' ');
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}
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node.className = newClassName.trim();
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}
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return this;
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};
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/******************************************************************************/
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var makeEventHandler = function(context, selector, callback) {
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return function(event) {
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var candidates = context.querySelectorAll(selector);
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if ( !candidates.length ) {
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return;
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}
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var node = event.target;
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var i;
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while ( node && node !== context ) {
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i = candidates.length;
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while ( i-- ) {
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if ( candidates[i] === node ) {
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return callback.bind(node).call(event);
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}
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}
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node = node.parentNode;
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}
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};
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};
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DOMList.prototype.on = function(etype, selector, callback) {
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if ( typeof selector === 'function' ) {
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callback = selector;
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selector = undefined;
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}
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var i = this.nodes.length;
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while ( i-- ) {
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if ( selector !== undefined ) {
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this.nodes[i].addEventListener(etype, makeEventHandler(this.nodes[i], selector, callback), true);
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} else {
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this.nodes[i].addEventListener(etype, callback);
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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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// TODO: Won't work for delegated handlers. Need to figure
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// what needs to be done.
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DOMList.prototype.off = function(evtype, callback) {
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var i = this.nodes.length;
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while ( i-- ) {
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this.nodes[i].removeEventListener(evtype, callback);
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}
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return this;
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};
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/******************************************************************************/
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DOMList.prototype.trigger = function(etype) {
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var ev = new CustomEvent(etype);
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var i = this.nodes.length;
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while ( i-- ) {
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this.nodes[i].dispatchEvent(ev);
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}
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return this;
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};
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/******************************************************************************/
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return DOMListFactory;
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})();
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