mirror of https://github.com/gorhill/uBlock.git
270 lines
8.4 KiB
JavaScript
270 lines
8.4 KiB
JavaScript
/*******************************************************************************
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uBlock Origin - a browser extension to block requests.
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Copyright (C) 2017-2018 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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'use strict';
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// Packaging this file is optional: it is not necessary to package it if the
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// platform is known to not support user stylesheets.
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// >>>>>>>> start of HUGE-IF-BLOCK
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if ( typeof vAPI === 'object' && vAPI.supportsUserStylesheets ) {
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/******************************************************************************/
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/******************************************************************************/
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vAPI.userStylesheet = {
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added: new Set(),
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removed: new Set(),
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apply: function(callback) {
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if ( this.added.size === 0 && this.removed.size === 0 ) { return; }
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vAPI.messaging.send('vapi', {
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what: 'userCSS',
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add: Array.from(this.added),
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remove: Array.from(this.removed)
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}, callback);
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this.added.clear();
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this.removed.clear();
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},
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add: function(cssText, now) {
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if ( cssText === '' ) { return; }
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this.added.add(cssText);
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if ( now ) { this.apply(); }
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},
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remove: function(cssText, now) {
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if ( cssText === '' ) { return; }
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this.removed.add(cssText);
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if ( now ) { this.apply(); }
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}
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};
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/******************************************************************************/
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vAPI.DOMFilterer = function() {
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this.commitTimer = new vAPI.SafeAnimationFrame(this.commitNow.bind(this));
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this.domIsReady = document.readyState !== 'loading';
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this.disabled = false;
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this.listeners = [];
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this.filterset = new Set();
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this.excludedNodeSet = new WeakSet();
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this.addedCSSRules = new Set();
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// https://github.com/uBlockOrigin/uBlock-issues/issues/167
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// By the time the DOMContentLoaded is fired, the content script might
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// have been disconnected from the background page. Unclear why this
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// would happen, so far seems to be a Chromium-specific behavior at
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// launch time.
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if ( this.domIsReady !== true ) {
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document.addEventListener('DOMContentLoaded', ( ) => {
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if ( vAPI instanceof Object === false ) { return; }
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this.domIsReady = true;
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this.commit();
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});
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}
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};
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vAPI.DOMFilterer.prototype = {
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reOnlySelectors: /\n\{[^\n]+/g,
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// Here we will deal with:
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// - Injecting low priority user styles;
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// - Notifying listeners about changed filterset.
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commitNow: function() {
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this.commitTimer.clear();
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var userStylesheet = vAPI.userStylesheet;
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for ( var entry of this.addedCSSRules ) {
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if (
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this.disabled === false &&
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entry.lazy &&
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entry.injected === false
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) {
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userStylesheet.add(
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entry.selectors + '\n{' + entry.declarations + '}'
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);
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}
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}
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this.addedCSSRules.clear();
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userStylesheet.apply();
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},
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commit: function(commitNow) {
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if ( commitNow ) {
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this.commitTimer.clear();
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this.commitNow();
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} else {
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this.commitTimer.start();
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}
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},
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addCSSRule: function(selectors, declarations, details) {
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if ( selectors === undefined ) { return; }
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var selectorsStr = Array.isArray(selectors)
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? selectors.join(',\n')
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: selectors;
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if ( selectorsStr.length === 0 ) { return; }
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if ( details === undefined ) { details = {}; }
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var entry = {
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selectors: selectorsStr,
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declarations,
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lazy: details.lazy === true,
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injected: details.injected === true
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};
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this.addedCSSRules.add(entry);
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this.filterset.add(entry);
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if (
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this.disabled === false &&
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entry.lazy !== true &&
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entry.injected !== true
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) {
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vAPI.userStylesheet.add(selectorsStr + '\n{' + declarations + '}');
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}
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this.commit();
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if ( this.hasListeners() ) {
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this.triggerListeners({
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declarative: [ [ selectorsStr, declarations ] ]
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});
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}
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},
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addListener: function(listener) {
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if ( this.listeners.indexOf(listener) !== -1 ) { return; }
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this.listeners.push(listener);
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},
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removeListener: function(listener) {
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var pos = this.listeners.indexOf(listener);
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if ( pos === -1 ) { return; }
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this.listeners.splice(pos, 1);
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},
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hasListeners: function() {
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return this.listeners.length !== 0;
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},
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triggerListeners: function(changes) {
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var i = this.listeners.length;
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while ( i-- ) {
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this.listeners[i].onFiltersetChanged(changes);
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}
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},
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excludeNode: function(node) {
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this.excludedNodeSet.add(node);
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this.unhideNode(node);
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},
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unexcludeNode: function(node) {
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this.excludedNodeSet.delete(node);
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},
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hideNode: function(node) {
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if ( this.excludedNodeSet.has(node) ) { return; }
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if ( this.hideNodeAttr === undefined ) { return; }
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node.setAttribute(this.hideNodeAttr, '');
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if ( this.hideNodeStyleSheetInjected === false ) {
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this.hideNodeStyleSheetInjected = true;
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this.addCSSRule(
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'[' + this.hideNodeAttr + ']',
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'display:none!important;'
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);
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}
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},
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unhideNode: function(node) {
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if ( this.hideNodeAttr === undefined ) { return; }
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node.removeAttribute(this.hideNodeAttr);
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},
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toggle: function(state, callback) {
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if ( state === undefined ) { state = this.disabled; }
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if ( state !== this.disabled ) { return; }
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this.disabled = !state;
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var userStylesheet = vAPI.userStylesheet;
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for ( var entry of this.filterset ) {
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var rule = entry.selectors + '\n{' + entry.declarations + '}';
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if ( this.disabled ) {
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userStylesheet.remove(rule);
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} else {
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userStylesheet.add(rule);
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}
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}
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userStylesheet.apply(callback);
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},
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getAllSelectors_: function(all) {
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var out = {
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declarative: []
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};
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var selectors;
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for ( var entry of this.filterset ) {
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selectors = entry.selectors;
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if ( all !== true && this.hideNodeAttr !== undefined ) {
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selectors = selectors
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.replace('[' + this.hideNodeAttr + ']', '')
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.replace(/^,\n|,\n$/gm, '');
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if ( selectors === '' ) { continue; }
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}
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out.declarative.push([ selectors, entry.declarations ]);
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}
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return out;
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},
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getFilteredElementCount: function() {
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let details = this.getAllSelectors_(true);
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if ( Array.isArray(details.declarative) === false ) { return 0; }
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let selectors = details.declarative.reduce(function(acc, entry) {
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acc.push(entry[0]);
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return acc;
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}, []);
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if ( selectors.length === 0 ) { return 0; }
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return document.querySelectorAll(selectors.join(',\n')).length;
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},
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getAllSelectors: function() {
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return this.getAllSelectors_(false);
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}
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};
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/******************************************************************************/
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/******************************************************************************/
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}
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// <<<<<<<< end of HUGE-IF-BLOCK
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/*******************************************************************************
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DO NOT:
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- Remove the following code
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- Add code beyond the following code
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Reason:
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- https://github.com/gorhill/uBlock/pull/3721
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- uBO never uses the return value from injected content scripts
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**/
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void 0;
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