mirror of
https://github.com/gorhill/uBlock.git
synced 2024-09-23 06:01:40 +02:00
dcd98f4efa
potentially causing high-generic cosmetic filters to not be applied because the MRU cache contains an empty list of high-generic filters when there is a query from a content script for cosmetic filters before they are fully loaded and ready.
1487 lines
50 KiB
JavaScript
1487 lines
50 KiB
JavaScript
/*******************************************************************************
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uBlock Origin - a browser extension to block requests.
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Copyright (C) 2014-2018 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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/******************************************************************************/
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µBlock.cosmeticFilteringEngine = (function(){
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/******************************************************************************/
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let µb = µBlock;
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let cosmeticSurveyingMissCountMax =
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parseInt(vAPI.localStorage.getItem('cosmeticSurveyingMissCountMax'), 10) ||
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15;
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let supportsUserStylesheets = vAPI.webextFlavor.soup.has('user_stylesheet');
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// https://www.reddit.com/r/uBlockOrigin/comments/8dkvqn/116_broken_loading_custom_filters_from_my_filters/
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window.addEventListener('webextFlavor', function() {
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supportsUserStylesheets = vAPI.webextFlavor.soup.has('user_stylesheet');
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}, { once: true });
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/*******************************************************************************
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Each filter class will register itself in the map.
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IMPORTANT: any change which modifies the mapping will have to be
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reflected with µBlock.systemSettings.compiledMagic.
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**/
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let filterClasses = [];
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let registerFilterClass = function(ctor) {
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filterClasses[ctor.prototype.fid] = ctor;
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};
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let filterFromCompiledData = function(args) {
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return filterClasses[args[0]].load(args);
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};
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/******************************************************************************/
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// One hostname => one selector
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let FilterOneOne = function(hostname, selector) {
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this.hostname = hostname;
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this.selector = selector;
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};
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FilterOneOne.prototype = {
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fid: 8,
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// Since this class can hold only one single selector, adding a new
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// hostname-selector requires to morph the filter instance into a
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// better-suited class.
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add: function(hostname, selector) {
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if ( hostname === this.hostname ) {
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return new FilterOneMany(
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this.hostname,
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[ this.selector, selector ]
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);
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}
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return new FilterManyAny([
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[ this.hostname, this.selector ],
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[ hostname, selector ]
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]);
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},
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retrieve: function(target, out) {
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if ( target.endsWith(this.hostname) === false ) { return; }
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let i = target.length - this.hostname.length;
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if ( i !== 0 && target.charCodeAt(i-1) !== 0x2E /* '.' */ ) { return; }
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out.add(this.selector);
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},
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compile: function() {
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return [ this.fid, this.hostname, this.selector ];
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}
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};
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FilterOneOne.load = function(data) {
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return new FilterOneOne(data[1], data[2]);
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};
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registerFilterClass(FilterOneOne);
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/******************************************************************************/
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// One hostname => many selectors
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let FilterOneMany = function(hostname, selectors) {
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this.hostname = hostname;
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this.selectors = selectors;
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};
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FilterOneMany.prototype = {
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fid: 9,
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// Since this class can hold selectors for only one specific hostname,
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// adding a new hostname will require to morph the filter instance into a
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// better-suited class.
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add: function(hostname, selector) {
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if ( hostname === this.hostname ) {
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this.selectors.push(selector);
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return this;
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}
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return new FilterManyAny([
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[ this.hostname, this.selectors ],
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[ hostname, selector ]
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]);
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},
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retrieve: function(target, out) {
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if ( target.endsWith(this.hostname) === false ) { return; }
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let i = target.length - this.hostname.length;
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if ( i !== 0 && target.charCodeAt(i-1) !== 0x2E /* '.' */ ) { return; }
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for ( let selector of this.selectors ) {
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out.add(selector);
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}
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},
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compile: function() {
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return [ this.fid, this.hostname, this.selectors ];
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}
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};
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FilterOneMany.load = function(data) {
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return new FilterOneMany(data[1], data[2]);
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};
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registerFilterClass(FilterOneMany);
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/******************************************************************************/
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// Many hostnames => one or many selectors
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let FilterManyAny = function(entries) {
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this.entries = new Map(entries);
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};
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FilterManyAny.prototype = {
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fid: 10,
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add: function(hostname, selector) {
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let selectors = this.entries.get(hostname);
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if ( selectors === undefined ) {
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this.entries.set(hostname, selector);
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} else if ( typeof selectors === 'string' ) {
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this.entries.set(hostname, [ selectors, selector ]);
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} else {
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selectors.push(selector);
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}
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},
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retrieve: function(target, out) {
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for ( let entry of this.entries ) {
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let hostname = entry[0];
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if ( target.endsWith(hostname) === false ) { continue; }
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let i = target.length - hostname.length;
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if ( i !== 0 && target.charCodeAt(i-1) !== 0x2E /* '.' */ ) {
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continue;
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}
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let selectors = entry[1];
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if ( typeof selectors === 'string' ) {
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out.add(selectors);
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continue;
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}
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for ( let selector of selectors ) {
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out.add(selector);
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}
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}
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},
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compile: function() {
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return [ this.fid, Array.from(this.entries) ];
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}
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};
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FilterManyAny.load = function(data) {
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return new FilterManyAny(data[1]);
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};
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registerFilterClass(FilterManyAny);
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/******************************************************************************/
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/******************************************************************************/
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let SelectorCacheEntry = function() {
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this.reset();
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};
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/******************************************************************************/
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SelectorCacheEntry.junkyard = [];
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SelectorCacheEntry.factory = function() {
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let entry = SelectorCacheEntry.junkyard.pop();
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if ( entry ) {
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return entry.reset();
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}
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return new SelectorCacheEntry();
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};
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/******************************************************************************/
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let netSelectorCacheLowWaterMark = 20;
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let netSelectorCacheHighWaterMark = 30;
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/******************************************************************************/
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SelectorCacheEntry.prototype = {
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reset: function() {
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this.cosmetic = new Set();
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this.cosmeticSurveyingMissCount = 0;
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this.net = new Map();
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this.lastAccessTime = Date.now();
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return this;
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},
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dispose: function() {
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this.cosmetic = this.net = null;
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if ( SelectorCacheEntry.junkyard.length < 25 ) {
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SelectorCacheEntry.junkyard.push(this);
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}
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},
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addCosmetic: function(details) {
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let selectors = details.selectors,
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i = selectors.length || 0;
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// https://github.com/gorhill/uBlock/issues/2011
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// Avoiding seemingly pointless surveys only if they appear costly.
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if ( details.first && i === 0 ) {
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if ( (details.cost || 0) >= 80 ) {
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this.cosmeticSurveyingMissCount += 1;
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}
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return;
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}
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this.cosmeticSurveyingMissCount = 0;
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while ( i-- ) {
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this.cosmetic.add(selectors[i]);
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}
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},
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addNet: function(selectors) {
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if ( typeof selectors === 'string' ) {
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this.addNetOne(selectors, Date.now());
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} else {
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this.addNetMany(selectors, Date.now());
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}
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// Net request-derived selectors: I limit the number of cached selectors,
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// as I expect cases where the blocked net-requests are never the
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// exact same URL.
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if ( this.net.size < netSelectorCacheHighWaterMark ) { return; }
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let dict = this.net;
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let keys = Array.from(dict.keys()).sort(function(a, b) {
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return dict.get(b) - dict.get(a);
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}).slice(netSelectorCacheLowWaterMark);
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let i = keys.length;
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while ( i-- ) {
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dict.delete(keys[i]);
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}
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},
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addNetOne: function(selector, now) {
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this.net.set(selector, now);
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},
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addNetMany: function(selectors, now) {
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let i = selectors.length || 0;
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while ( i-- ) {
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this.net.set(selectors[i], now);
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}
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},
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add: function(details) {
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this.lastAccessTime = Date.now();
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if ( details.type === 'cosmetic' ) {
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this.addCosmetic(details);
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} else {
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this.addNet(details.selectors);
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}
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},
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// https://github.com/chrisaljoudi/uBlock/issues/420
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remove: function(type) {
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this.lastAccessTime = Date.now();
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if ( type === undefined || type === 'cosmetic' ) {
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this.cosmetic.clear();
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this.cosmeticSurveyingMissCount = 0;
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}
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if ( type === undefined || type === 'net' ) {
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this.net.clear();
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}
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},
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retrieveToArray: function(iterator, out) {
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for ( let selector of iterator ) {
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out.push(selector);
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}
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},
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retrieveToSet: function(iterator, out) {
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for ( let selector of iterator ) {
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out.add(selector);
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}
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},
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retrieve: function(type, out) {
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this.lastAccessTime = Date.now();
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let iterator = type === 'cosmetic' ? this.cosmetic : this.net.keys();
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if ( Array.isArray(out) ) {
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this.retrieveToArray(iterator, out);
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} else {
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this.retrieveToSet(iterator, out);
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}
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}
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};
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/******************************************************************************/
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/******************************************************************************/
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// HHHHHHHHHHHH0000
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// | |
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// | |
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// | +-- bit 3-0: reserved: 0=exception
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// | 1=procedural
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// +------ bit 15-4: FNV
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let makeHash = function(token) {
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// Based on: FNV32a
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// http://www.isthe.com/chongo/tech/comp/fnv/index.html#FNV-reference-source
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// The rest is custom, suited for uBlock.
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let i1 = token.length;
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let i2 = i1 >> 1;
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let i4 = i1 >> 2;
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let i8 = i1 >> 3;
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let hval = (0x811c9dc5 ^ token.charCodeAt(0)) >>> 0;
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hval += (hval<<1) + (hval<<4) + (hval<<7) + (hval<<8) + (hval<<24);
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hval >>>= 0;
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hval ^= token.charCodeAt(i8);
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hval += (hval<<1) + (hval<<4) + (hval<<7) + (hval<<8) + (hval<<24);
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hval >>>= 0;
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hval ^= token.charCodeAt(i4);
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hval += (hval<<1) + (hval<<4) + (hval<<7) + (hval<<8) + (hval<<24);
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hval >>>= 0;
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hval ^= token.charCodeAt(i4+i8);
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hval += (hval<<1) + (hval<<4) + (hval<<7) + (hval<<8) + (hval<<24);
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hval >>>= 0;
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hval ^= token.charCodeAt(i2);
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hval += (hval<<1) + (hval<<4) + (hval<<7) + (hval<<8) + (hval<<24);
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hval >>>= 0;
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hval ^= token.charCodeAt(i2+i8);
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hval += (hval<<1) + (hval<<4) + (hval<<7) + (hval<<8) + (hval<<24);
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hval >>>= 0;
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hval ^= token.charCodeAt(i2+i4);
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hval += (hval<<1) + (hval<<4) + (hval<<7) + (hval<<8) + (hval<<24);
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hval >>>= 0;
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hval ^= token.charCodeAt(i1-1);
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hval += (hval<<1) + (hval<<4) + (hval<<7) + (hval<<8) + (hval<<24);
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hval >>>= 0;
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return hval & 0xFFF0;
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};
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/******************************************************************************/
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/******************************************************************************/
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// Cosmetic filter family tree:
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//
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// Generic
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// Low generic simple: class or id only
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// Low generic complex: class or id + extra stuff after
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// High generic:
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// High-low generic: [alt="..."],[title="..."]
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// High-medium generic: [href^="..."]
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// High-high generic: everything else
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// Specific
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// Specfic hostname
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// Specific entity
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// Generic filters can only be enforced once the main document is loaded.
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// Specific filers can be enforced before the main document is loaded.
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let FilterContainer = function() {
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this.reHasUnicode = /[^\x00-\x7F]/;
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this.rePlainSelector = /^[#.][\w\\-]+/;
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this.rePlainSelectorEscaped = /^[#.](?:\\[0-9A-Fa-f]+ |\\.|\w|-)+/;
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||
this.rePlainSelectorEx = /^[^#.\[(]+([#.][\w-]+)|([#.][\w-]+)$/;
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this.reEscapeSequence = /\\([0-9A-Fa-f]+ |.)/g;
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this.reSimpleHighGeneric1 = /^[a-z]*\[[^[]+]$/;
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this.reHighMedium = /^\[href\^="https?:\/\/([^"]{8})[^"]*"\]$/;
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||
this.reNeedHostname = new RegExp([
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'^',
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'(?:',
|
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[
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'.+?:has',
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'.+?:has-text',
|
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'.+?:if',
|
||
'.+?:if-not',
|
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'.+?:matches-css(?:-before|-after)?',
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'.*?:xpath',
|
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'.+?:style',
|
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'.+?:-abp-contains', // ABP-specific for `:has-text`
|
||
'.+?:-abp-has', // ABP-specific for `:if`
|
||
'.+?:contains' // Adguard-specific for `:has-text`
|
||
].join('|'),
|
||
')',
|
||
'\\(.+\\)',
|
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'$'
|
||
].join(''));
|
||
|
||
this.selectorCache = new Map();
|
||
this.selectorCachePruneDelay = 10 * 60 * 1000; // 10 minutes
|
||
this.selectorCacheAgeMax = 120 * 60 * 1000; // 120 minutes
|
||
this.selectorCacheCountMin = 25;
|
||
this.netSelectorCacheCountMax = netSelectorCacheHighWaterMark;
|
||
this.selectorCacheTimer = null;
|
||
|
||
// generic exception filters
|
||
this.genericDonthideSet = new Set();
|
||
|
||
// TODO: Think about reusing µb.staticExtFilteringEngine.HostnameBasedDB
|
||
// for both specific and procedural filters. This would require some
|
||
// refactoring.
|
||
// hostname, entity-based filters
|
||
this.specificFilters = new Map();
|
||
|
||
// low generic cosmetic filters, organized by id/class then simple/complex.
|
||
this.lowlyGeneric = Object.create(null);
|
||
this.lowlyGeneric.id = {
|
||
canonical: 'ids',
|
||
prefix: '#',
|
||
simple: new Set(),
|
||
complex: new Map()
|
||
};
|
||
this.lowlyGeneric.cl = {
|
||
canonical: 'classes',
|
||
prefix: '.',
|
||
simple: new Set(),
|
||
complex: new Map()
|
||
};
|
||
|
||
// highly generic selectors sets
|
||
this.highlyGeneric = Object.create(null);
|
||
this.highlyGeneric.simple = {
|
||
canonical: 'highGenericHideSimple',
|
||
dict: new Set(),
|
||
str: '',
|
||
mru: new µb.MRUCache(16)
|
||
};
|
||
this.highlyGeneric.complex = {
|
||
canonical: 'highGenericHideComplex',
|
||
dict: new Set(),
|
||
str: '',
|
||
mru: new µb.MRUCache(16)
|
||
};
|
||
|
||
// Short-lived: content is valid only during one function call. These
|
||
// is to prevent repeated allocation/deallocation overheads -- the
|
||
// constructors/destructors of javascript Set/Map is assumed to be costlier
|
||
// than just calling clear() on these.
|
||
this.setRegister0 = new Set();
|
||
this.setRegister1 = new Set();
|
||
this.setRegister2 = new Set();
|
||
this.mapRegister0 = new Map();
|
||
|
||
this.reset();
|
||
};
|
||
|
||
/******************************************************************************/
|
||
|
||
// Reset all, thus reducing to a minimum memory footprint of the context.
|
||
|
||
FilterContainer.prototype.reset = function() {
|
||
this.µburi = µb.URI;
|
||
this.frozen = false;
|
||
this.acceptedCount = 0;
|
||
this.discardedCount = 0;
|
||
this.duplicateBuster = new Set();
|
||
|
||
this.selectorCache.clear();
|
||
if ( this.selectorCacheTimer !== null ) {
|
||
clearTimeout(this.selectorCacheTimer);
|
||
this.selectorCacheTimer = null;
|
||
}
|
||
|
||
// generic filters
|
||
this.hasGenericHide = false;
|
||
|
||
// generic exception filters
|
||
this.genericDonthideSet.clear();
|
||
|
||
// hostname, entity-based filters
|
||
this.specificFilters.clear();
|
||
|
||
// low generic cosmetic filters, organized by id/class then simple/complex.
|
||
this.lowlyGeneric.id.simple.clear();
|
||
this.lowlyGeneric.id.complex.clear();
|
||
this.lowlyGeneric.cl.simple.clear();
|
||
this.lowlyGeneric.cl.complex.clear();
|
||
|
||
// highly generic selectors sets
|
||
this.highlyGeneric.simple.dict.clear();
|
||
this.highlyGeneric.simple.str = '';
|
||
this.highlyGeneric.simple.mru.reset();
|
||
this.highlyGeneric.complex.dict.clear();
|
||
this.highlyGeneric.complex.str = '';
|
||
this.highlyGeneric.complex.mru.reset();
|
||
};
|
||
|
||
/******************************************************************************/
|
||
|
||
FilterContainer.prototype.freeze = function() {
|
||
this.duplicateBuster = new Set();
|
||
|
||
this.hasGenericHide =
|
||
this.lowlyGeneric.id.simple.size !== 0 ||
|
||
this.lowlyGeneric.id.complex.size !== 0 ||
|
||
this.lowlyGeneric.cl.simple.size !== 0 ||
|
||
this.lowlyGeneric.cl.complex.size !== 0 ||
|
||
this.highlyGeneric.simple.dict.size !== 0 ||
|
||
this.highlyGeneric.complex.dict.size !== 0;
|
||
|
||
if ( this.genericDonthideSet.size !== 0 ) {
|
||
for ( let selector of this.genericDonthideSet ) {
|
||
let type = selector.charCodeAt(0);
|
||
if ( type === 0x23 /* '#' */ ) {
|
||
this.lowlyGeneric.id.simple.delete(selector.slice(1));
|
||
} else if ( type === 0x2E /* '.' */ ) {
|
||
this.lowlyGeneric.cl.simple.delete(selector.slice(1));
|
||
}
|
||
// TODO:
|
||
// this.lowlyGeneric.id.complex.delete(selector);
|
||
// this.lowlyGeneric.cl.complex.delete(selector);
|
||
this.highlyGeneric.simple.dict.delete(selector);
|
||
this.highlyGeneric.complex.dict.delete(selector);
|
||
}
|
||
}
|
||
this.highlyGeneric.simple.str = Array.from(this.highlyGeneric.simple.dict).join(',\n');
|
||
this.highlyGeneric.simple.mru.reset();
|
||
this.highlyGeneric.complex.str = Array.from(this.highlyGeneric.complex.dict).join(',\n');
|
||
this.highlyGeneric.complex.mru.reset();
|
||
|
||
this.frozen = true;
|
||
};
|
||
|
||
|
||
/******************************************************************************/
|
||
|
||
// https://github.com/gorhill/uBlock/issues/1668
|
||
// The key must be literal: unescape escaped CSS before extracting key.
|
||
// It's an uncommon case, so it's best to unescape only when needed.
|
||
|
||
FilterContainer.prototype.keyFromSelector = function(selector) {
|
||
let matches = this.rePlainSelector.exec(selector);
|
||
if ( matches === null ) { return; }
|
||
let key = matches[0];
|
||
if ( key.indexOf('\\') === -1 ) {
|
||
return key;
|
||
}
|
||
matches = this.rePlainSelectorEscaped.exec(selector);
|
||
if ( matches === null ) { return; }
|
||
key = '';
|
||
let escaped = matches[0],
|
||
beg = 0;
|
||
this.reEscapeSequence.lastIndex = 0;
|
||
for (;;) {
|
||
matches = this.reEscapeSequence.exec(escaped);
|
||
if ( matches === null ) {
|
||
return key + escaped.slice(beg);
|
||
}
|
||
key += escaped.slice(beg, matches.index);
|
||
beg = this.reEscapeSequence.lastIndex;
|
||
if ( matches[1].length === 1 ) {
|
||
key += matches[1];
|
||
} else {
|
||
key += String.fromCharCode(parseInt(matches[1], 16));
|
||
}
|
||
}
|
||
};
|
||
|
||
/******************************************************************************/
|
||
|
||
FilterContainer.prototype.compile = function(parsed, writer) {
|
||
// 1000 = cosmetic filtering
|
||
writer.select(1000);
|
||
|
||
let hostnames = parsed.hostnames,
|
||
i = hostnames.length;
|
||
if ( i === 0 ) {
|
||
this.compileGenericSelector(parsed, writer);
|
||
return true;
|
||
}
|
||
|
||
// https://github.com/chrisaljoudi/uBlock/issues/151
|
||
// Negated hostname means the filter applies to all non-negated hostnames
|
||
// of same filter OR globally if there is no non-negated hostnames.
|
||
let applyGlobally = true;
|
||
while ( i-- ) {
|
||
let hostname = hostnames[i];
|
||
if ( hostname.startsWith('~') === false ) {
|
||
applyGlobally = false;
|
||
}
|
||
this.compileSpecificSelector(hostname, parsed, writer);
|
||
}
|
||
if ( applyGlobally ) {
|
||
this.compileGenericSelector(parsed, writer);
|
||
}
|
||
|
||
return true;
|
||
};
|
||
|
||
/******************************************************************************/
|
||
|
||
FilterContainer.prototype.compileGenericSelector = function(parsed, writer) {
|
||
if ( parsed.exception === false ) {
|
||
this.compileGenericHideSelector(parsed, writer);
|
||
} else {
|
||
this.compileGenericUnhideSelector(parsed, writer);
|
||
}
|
||
};
|
||
|
||
/******************************************************************************/
|
||
|
||
FilterContainer.prototype.compileGenericHideSelector = function(parsed, writer) {
|
||
let selector = parsed.suffix;
|
||
|
||
// For some selectors, it is mandatory to have a hostname or entity:
|
||
// ##.foo:-abp-contains(...)
|
||
// ##.foo:-abp-has(...)
|
||
// ##.foo:contains(...)
|
||
// ##.foo:has(...)
|
||
// ##.foo:has-text(...)
|
||
// ##.foo:if(...)
|
||
// ##.foo:if-not(...)
|
||
// ##.foo:matches-css(...)
|
||
// ##.foo:matches-css-after(...)
|
||
// ##.foo:matches-css-before(...)
|
||
// ##:xpath(...)
|
||
// ##.foo:style(...)
|
||
if ( this.reNeedHostname.test(selector) ) {
|
||
µb.logger.writeOne(
|
||
'',
|
||
'error',
|
||
'Cosmetic filtering – invalid generic filter: ##' + selector
|
||
);
|
||
return;
|
||
}
|
||
|
||
let type = selector.charCodeAt(0);
|
||
|
||
if ( type === 0x23 /* '#' */ ) {
|
||
let key = this.keyFromSelector(selector);
|
||
if ( key === undefined ) { return; }
|
||
// Simple selector-based CSS rule: no need to test for whether the
|
||
// selector is valid, the regex took care of this. Most generic
|
||
// selector falls into that category.
|
||
if ( key === selector ) {
|
||
writer.push([ 0 /* lg */, key.slice(1) ]);
|
||
return;
|
||
}
|
||
// Complex selector-based CSS rule.
|
||
if ( µb.staticExtFilteringEngine.compileSelector(selector) !== undefined ) {
|
||
writer.push([ 1 /* lg+ */, key.slice(1), selector ]);
|
||
}
|
||
return;
|
||
}
|
||
|
||
if ( type === 0x2E /* '.' */ ) {
|
||
let key = this.keyFromSelector(selector);
|
||
if ( key === undefined ) { return; }
|
||
// Simple selector-based CSS rule: no need to test for whether the
|
||
// selector is valid, the regex took care of this. Most generic
|
||
// selector falls into that category.
|
||
if ( key === selector ) {
|
||
writer.push([ 2 /* lg */, key.slice(1) ]);
|
||
return;
|
||
}
|
||
// Complex selector-based CSS rule.
|
||
if ( µb.staticExtFilteringEngine.compileSelector(selector) !== undefined ) {
|
||
writer.push([ 3 /* lg+ */, key.slice(1), selector ]);
|
||
}
|
||
return;
|
||
}
|
||
|
||
let compiled = µb.staticExtFilteringEngine.compileSelector(selector);
|
||
if ( compiled === undefined ) { return; }
|
||
// TODO: Detect and error on procedural cosmetic filters.
|
||
|
||
// https://github.com/gorhill/uBlock/issues/909
|
||
// Anything which contains a plain id/class selector can be classified
|
||
// as a low generic cosmetic filter.
|
||
let matches = this.rePlainSelectorEx.exec(selector);
|
||
if ( matches !== null ) {
|
||
let key = matches[1] || matches[2];
|
||
type = key.charCodeAt(0);
|
||
writer.push([
|
||
type === 0x23 ? 1 : 3 /* lg+ */,
|
||
key.slice(1),
|
||
selector
|
||
]);
|
||
return;
|
||
}
|
||
|
||
// Pass this point, we are dealing with highly-generic cosmetic filters.
|
||
//
|
||
// For efficiency purpose, we will distinguish between simple and complex
|
||
// selectors.
|
||
|
||
if ( this.reSimpleHighGeneric1.test(selector) ) {
|
||
writer.push([ 4 /* simple */, selector ]);
|
||
return;
|
||
}
|
||
|
||
if ( selector.indexOf(' ') === -1 ) {
|
||
writer.push([ 4 /* simple */, selector ]);
|
||
} else {
|
||
writer.push([ 5 /* complex */, selector ]);
|
||
}
|
||
};
|
||
|
||
/******************************************************************************/
|
||
|
||
FilterContainer.prototype.compileGenericUnhideSelector = function(
|
||
parsed,
|
||
writer
|
||
) {
|
||
// Procedural cosmetic filters are acceptable as generic exception filters.
|
||
let compiled = µb.staticExtFilteringEngine.compileSelector(parsed.suffix);
|
||
if ( compiled === undefined ) { return; }
|
||
|
||
// https://github.com/chrisaljoudi/uBlock/issues/497
|
||
// All generic exception filters are put in the same bucket: they are
|
||
// expected to be very rare.
|
||
writer.push([ 7 /* g1 */, compiled ]);
|
||
};
|
||
|
||
/******************************************************************************/
|
||
|
||
FilterContainer.prototype.compileSpecificSelector = function(
|
||
hostname,
|
||
parsed,
|
||
writer
|
||
) {
|
||
// https://github.com/chrisaljoudi/uBlock/issues/145
|
||
let unhide = parsed.exception ? 1 : 0;
|
||
if ( hostname.startsWith('~') ) {
|
||
hostname = hostname.slice(1);
|
||
unhide ^= 1;
|
||
}
|
||
|
||
let compiled = µb.staticExtFilteringEngine.compileSelector(parsed.suffix);
|
||
if ( compiled === undefined ) { return; }
|
||
|
||
// https://github.com/chrisaljoudi/uBlock/issues/188
|
||
// If not a real domain as per PSL, assign a synthetic one
|
||
let hash;
|
||
if ( hostname.endsWith('.*') === false ) {
|
||
let domain = this.µburi.domainFromHostnameNoCache(hostname);
|
||
hash = domain !== '' ? makeHash(domain) : 0;
|
||
} else {
|
||
hash = makeHash(hostname);
|
||
}
|
||
if ( unhide === 1 ) {
|
||
hash |= 0b01;
|
||
}
|
||
|
||
writer.push([
|
||
8,
|
||
compiled.charCodeAt(0) !== 0x7B ? hash : hash | 0b10,
|
||
hostname,
|
||
compiled
|
||
]);
|
||
};
|
||
|
||
/******************************************************************************/
|
||
|
||
FilterContainer.prototype.fromCompiledContent = function(reader, options) {
|
||
if ( options.skipCosmetic ) {
|
||
this.skipCompiledContent(reader);
|
||
return;
|
||
}
|
||
if ( options.skipGenericCosmetic ) {
|
||
this.skipGenericCompiledContent(reader);
|
||
return;
|
||
}
|
||
|
||
// 1000 = cosmetic filtering
|
||
reader.select(1000);
|
||
|
||
let db, bucket;
|
||
|
||
while ( reader.next() ) {
|
||
this.acceptedCount += 1;
|
||
let fingerprint = reader.fingerprint();
|
||
if ( this.duplicateBuster.has(fingerprint) ) {
|
||
this.discardedCount += 1;
|
||
continue;
|
||
}
|
||
this.duplicateBuster.add(fingerprint);
|
||
|
||
let args = reader.args();
|
||
|
||
switch ( args[0] ) {
|
||
|
||
// low generic, simple
|
||
case 0: // #AdBanner
|
||
case 2: // .largeAd
|
||
db = args[0] === 0 ? this.lowlyGeneric.id : this.lowlyGeneric.cl;
|
||
bucket = db.complex.get(args[1]);
|
||
if ( bucket === undefined ) {
|
||
db.simple.add(args[1]);
|
||
} else if ( Array.isArray(bucket) ) {
|
||
bucket.push(args[1]);
|
||
} else {
|
||
db.complex.set(args[1], [ bucket, args[1] ]);
|
||
}
|
||
break;
|
||
|
||
// low generic, complex
|
||
case 1: // #tads + div + .c
|
||
case 3: // .Mpopup + #Mad > #MadZone
|
||
db = args[0] === 1 ? this.lowlyGeneric.id : this.lowlyGeneric.cl;
|
||
bucket = db.complex.get(args[1]);
|
||
if ( bucket === undefined ) {
|
||
if ( db.simple.has(args[1]) ) {
|
||
db.complex.set(args[1], [ args[1], args[2] ]);
|
||
} else {
|
||
db.complex.set(args[1], args[2]);
|
||
db.simple.add(args[1]);
|
||
}
|
||
} else if ( Array.isArray(bucket) ) {
|
||
bucket.push(args[2]);
|
||
} else {
|
||
db.complex.set(args[1], [ bucket, args[2] ]);
|
||
}
|
||
break;
|
||
|
||
// High-high generic hide/simple selectors
|
||
// div[id^="allo"]
|
||
case 4:
|
||
this.highlyGeneric.simple.dict.add(args[1]);
|
||
break;
|
||
|
||
// High-high generic hide/complex selectors
|
||
// div[id^="allo"] > span
|
||
case 5:
|
||
this.highlyGeneric.complex.dict.add(args[1]);
|
||
break;
|
||
|
||
// https://github.com/chrisaljoudi/uBlock/issues/497
|
||
// Generic exception filters: expected to be a rare occurrence.
|
||
// #@#.tweet
|
||
case 7:
|
||
this.genericDonthideSet.add(args[1]);
|
||
break;
|
||
|
||
// hash, example.com, .promoted-tweet
|
||
// hash, example.*, .promoted-tweet
|
||
case 8:
|
||
bucket = this.specificFilters.get(args[1]);
|
||
if ( bucket === undefined ) {
|
||
this.specificFilters.set(
|
||
args[1],
|
||
new FilterOneOne(args[2], args[3])
|
||
);
|
||
} else if ( bucket instanceof FilterManyAny ) {
|
||
bucket.add(args[2], args[3]);
|
||
} else /* can morph, so we need to replace entry in map */ {
|
||
this.specificFilters.set(
|
||
args[1],
|
||
bucket.add(args[2], args[3])
|
||
);
|
||
}
|
||
break;
|
||
|
||
default:
|
||
this.discardedCount += 1;
|
||
break;
|
||
}
|
||
}
|
||
};
|
||
|
||
/******************************************************************************/
|
||
|
||
FilterContainer.prototype.skipGenericCompiledContent = function(reader) {
|
||
// 1000 = cosmetic filtering
|
||
reader.select(1000);
|
||
|
||
let bucket;
|
||
|
||
while ( reader.next() ) {
|
||
this.acceptedCount += 1;
|
||
let fingerprint = reader.fingerprint();
|
||
if ( this.duplicateBuster.has(fingerprint) ) {
|
||
this.discardedCount += 1;
|
||
continue;
|
||
}
|
||
|
||
let args = reader.args();
|
||
|
||
switch ( args[0] ) {
|
||
|
||
// https://github.com/chrisaljoudi/uBlock/issues/497
|
||
// Generic exception filters: expected to be a rare occurrence.
|
||
case 7:
|
||
this.duplicateBuster.add(fingerprint);
|
||
this.genericDonthideSet.add(args[1]);
|
||
break;
|
||
|
||
// hash, example.com, .promoted-tweet
|
||
// hash, example.*, .promoted-tweet
|
||
case 8:
|
||
bucket = this.specificFilters.get(args[1]);
|
||
if ( bucket === undefined ) {
|
||
this.specificFilters.set(
|
||
args[1],
|
||
new FilterOneOne(args[2], args[3])
|
||
);
|
||
} else if ( bucket instanceof FilterManyAny ) {
|
||
bucket.add(args[2], args[3]);
|
||
} else /* can morph, so we need to replace entry in map */ {
|
||
this.specificFilters.set(
|
||
args[1],
|
||
bucket.add(args[2], args[3])
|
||
);
|
||
}
|
||
break;
|
||
|
||
default:
|
||
this.discardedCount += 1;
|
||
break;
|
||
}
|
||
}
|
||
};
|
||
|
||
/******************************************************************************/
|
||
|
||
FilterContainer.prototype.skipCompiledContent = function(reader) {
|
||
// 1000 = cosmetic filtering
|
||
reader.select(1000);
|
||
|
||
while ( reader.next() ) {
|
||
this.acceptedCount += 1;
|
||
this.discardedCount += 1;
|
||
}
|
||
};
|
||
|
||
/******************************************************************************/
|
||
|
||
FilterContainer.prototype.toSelfie = function() {
|
||
let selfieFromMap = function(map) {
|
||
let entries = [];
|
||
for ( let entry of map ) {
|
||
entries.push([ entry[0], entry[1].compile() ]);
|
||
}
|
||
return entries;
|
||
};
|
||
|
||
return {
|
||
acceptedCount: this.acceptedCount,
|
||
discardedCount: this.discardedCount,
|
||
specificFilters: selfieFromMap(this.specificFilters),
|
||
hasGenericHide: this.hasGenericHide,
|
||
lowlyGenericSID: Array.from(this.lowlyGeneric.id.simple),
|
||
lowlyGenericCID: Array.from(this.lowlyGeneric.id.complex),
|
||
lowlyGenericSCL: Array.from(this.lowlyGeneric.cl.simple),
|
||
lowlyGenericCCL: Array.from(this.lowlyGeneric.cl.complex),
|
||
highSimpleGenericHideArray: Array.from(this.highlyGeneric.simple.dict),
|
||
highComplexGenericHideArray: Array.from(this.highlyGeneric.complex.dict),
|
||
genericDonthideArray: Array.from(this.genericDonthideSet)
|
||
};
|
||
};
|
||
|
||
/******************************************************************************/
|
||
|
||
FilterContainer.prototype.fromSelfie = function(selfie) {
|
||
let mapFromSelfie = function(entries) {
|
||
let out = new Map();
|
||
for ( let entry of entries ) {
|
||
out.set(entry[0], filterFromCompiledData(entry[1]));
|
||
}
|
||
return out;
|
||
};
|
||
|
||
this.acceptedCount = selfie.acceptedCount;
|
||
this.discardedCount = selfie.discardedCount;
|
||
this.specificFilters = mapFromSelfie(selfie.specificFilters);
|
||
this.hasGenericHide = selfie.hasGenericHide;
|
||
this.lowlyGeneric.id.simple = new Set(selfie.lowlyGenericSID);
|
||
this.lowlyGeneric.id.complex = new Map(selfie.lowlyGenericCID);
|
||
this.lowlyGeneric.cl.simple = new Set(selfie.lowlyGenericSCL);
|
||
this.lowlyGeneric.cl.complex = new Map(selfie.lowlyGenericCCL);
|
||
this.highlyGeneric.simple.dict = new Set(selfie.highSimpleGenericHideArray);
|
||
this.highlyGeneric.simple.str = selfie.highSimpleGenericHideArray.join(',\n');
|
||
this.highlyGeneric.complex.dict = new Set(selfie.highComplexGenericHideArray);
|
||
this.highlyGeneric.complex.str = selfie.highComplexGenericHideArray.join(',\n');
|
||
this.genericDonthideSet = new Set(selfie.genericDonthideArray);
|
||
this.frozen = true;
|
||
};
|
||
|
||
/******************************************************************************/
|
||
|
||
FilterContainer.prototype.triggerSelectorCachePruner = function() {
|
||
// Of interest: http://fitzgeraldnick.com/weblog/40/
|
||
// http://googlecode.blogspot.ca/2009/07/gmail-for-mobile-html5-series-using.html
|
||
if ( this.selectorCacheTimer === null ) {
|
||
this.selectorCacheTimer = vAPI.setTimeout(
|
||
this.pruneSelectorCacheAsync.bind(this),
|
||
this.selectorCachePruneDelay
|
||
);
|
||
}
|
||
};
|
||
|
||
/******************************************************************************/
|
||
|
||
FilterContainer.prototype.addToSelectorCache = function(details) {
|
||
let hostname = details.hostname;
|
||
if ( typeof hostname !== 'string' || hostname === '' ) { return; }
|
||
let selectors = details.selectors;
|
||
if ( Array.isArray(selectors) === false ) { return; }
|
||
let entry = this.selectorCache.get(hostname);
|
||
if ( entry === undefined ) {
|
||
entry = SelectorCacheEntry.factory();
|
||
this.selectorCache.set(hostname, entry);
|
||
if ( this.selectorCache.size > this.selectorCacheCountMin ) {
|
||
this.triggerSelectorCachePruner();
|
||
}
|
||
}
|
||
entry.add(details);
|
||
};
|
||
|
||
/******************************************************************************/
|
||
|
||
FilterContainer.prototype.removeFromSelectorCache = function(
|
||
targetHostname,
|
||
type
|
||
) {
|
||
let targetHostnameLength = targetHostname.length;
|
||
for ( let entry of this.selectorCache ) {
|
||
let hostname = entry[0];
|
||
let item = entry[1];
|
||
if ( targetHostname !== '*' ) {
|
||
if ( hostname.endsWith(targetHostname) === false ) { continue; }
|
||
if (
|
||
hostname.length !== targetHostnameLength &&
|
||
hostname.charAt(hostname.length - targetHostnameLength - 1) !== '.'
|
||
) {
|
||
continue;
|
||
}
|
||
}
|
||
item.remove(type);
|
||
}
|
||
};
|
||
|
||
/******************************************************************************/
|
||
|
||
FilterContainer.prototype.retrieveFromSelectorCache = function(
|
||
hostname,
|
||
type,
|
||
out
|
||
) {
|
||
let entry = this.selectorCache.get(hostname);
|
||
if ( entry !== undefined ) {
|
||
entry.retrieve(type, out);
|
||
}
|
||
};
|
||
|
||
/******************************************************************************/
|
||
|
||
FilterContainer.prototype.pruneSelectorCacheAsync = function() {
|
||
this.selectorCacheTimer = null;
|
||
if ( this.selectorCache.size <= this.selectorCacheCountMin ) { return; }
|
||
let cache = this.selectorCache;
|
||
// Sorted from most-recently-used to least-recently-used, because
|
||
// we loop beginning at the end below.
|
||
// We can't avoid sorting because we have to keep a minimum number of
|
||
// entries, and these entries should always be the most-recently-used.
|
||
let hostnames = Array.from(cache.keys())
|
||
.sort(function(a, b) {
|
||
return cache.get(b).lastAccessTime -
|
||
cache.get(a).lastAccessTime;
|
||
})
|
||
.slice(this.selectorCacheCountMin);
|
||
let obsolete = Date.now() - this.selectorCacheAgeMax,
|
||
i = hostnames.length;
|
||
while ( i-- ) {
|
||
let hostname = hostnames[i];
|
||
let entry = cache.get(hostname);
|
||
if ( entry.lastAccessTime > obsolete ) { break; }
|
||
// console.debug('pruneSelectorCacheAsync: flushing "%s"', hostname);
|
||
entry.dispose();
|
||
cache.delete(hostname);
|
||
}
|
||
if ( cache.size > this.selectorCacheCountMin ) {
|
||
this.triggerSelectorCachePruner();
|
||
}
|
||
};
|
||
|
||
/******************************************************************************/
|
||
|
||
FilterContainer.prototype.randomAlphaToken = function() {
|
||
return String.fromCharCode(Date.now() % 26 + 97) +
|
||
Math.floor(Math.random() * 982451653 + 982451653).toString(36);
|
||
};
|
||
|
||
/******************************************************************************/
|
||
|
||
FilterContainer.prototype.retrieveGenericSelectors = function(request) {
|
||
if ( this.acceptedCount === 0 ) { return; }
|
||
if ( !request.ids && !request.classes ) { return; }
|
||
|
||
//console.time('cosmeticFilteringEngine.retrieveGenericSelectors');
|
||
|
||
let simpleSelectors = this.setRegister0,
|
||
complexSelectors = this.setRegister1;
|
||
|
||
let cacheEntry = this.selectorCache.get(request.hostname),
|
||
previousHits = cacheEntry && cacheEntry.cosmetic || this.setRegister2;
|
||
|
||
for ( let type in this.lowlyGeneric ) {
|
||
let entry = this.lowlyGeneric[type];
|
||
let selectors = request[entry.canonical];
|
||
if ( typeof selectors !== 'string' ) { continue; }
|
||
let strEnd = selectors.length;
|
||
let sliceBeg = 0;
|
||
do {
|
||
let sliceEnd = selectors.indexOf('\n', sliceBeg);
|
||
if ( sliceEnd === -1 ) { sliceEnd = strEnd; }
|
||
let selector = selectors.slice(sliceBeg, sliceEnd);
|
||
sliceBeg = sliceEnd + 1;
|
||
if ( entry.simple.has(selector) === false ) { continue; }
|
||
let bucket = entry.complex.get(selector);
|
||
if ( bucket !== undefined ) {
|
||
if ( Array.isArray(bucket) ) {
|
||
for ( selector of bucket ) {
|
||
if ( previousHits.has(selector) === false ) {
|
||
complexSelectors.add(selector);
|
||
}
|
||
}
|
||
} else if ( previousHits.has(bucket) === false ) {
|
||
complexSelectors.add(bucket);
|
||
}
|
||
} else {
|
||
selector = entry.prefix + selector;
|
||
if ( previousHits.has(selector) === false ) {
|
||
simpleSelectors.add(selector);
|
||
}
|
||
}
|
||
} while ( sliceBeg < strEnd );
|
||
}
|
||
|
||
// Apply exceptions: it is the responsibility of the caller to provide
|
||
// the exceptions to be applied.
|
||
if ( Array.isArray(request.exceptions) ) {
|
||
for ( let exception of request.exceptions ) {
|
||
simpleSelectors.delete(exception);
|
||
complexSelectors.delete(exception);
|
||
}
|
||
}
|
||
|
||
if ( simpleSelectors.size === 0 && complexSelectors.size === 0 ) {
|
||
return;
|
||
}
|
||
|
||
let out = {
|
||
simple: Array.from(simpleSelectors),
|
||
complex: Array.from(complexSelectors),
|
||
injected: ''
|
||
};
|
||
|
||
// Cache and inject (if user stylesheets supported) looked-up low generic
|
||
// cosmetic filters.
|
||
if ( typeof request.hostname === 'string' && request.hostname !== '' ) {
|
||
this.addToSelectorCache({
|
||
cost: request.surveyCost || 0,
|
||
hostname: request.hostname,
|
||
injectedHideFilters: '',
|
||
selectors: out.simple.concat(out.complex),
|
||
type: 'cosmetic'
|
||
});
|
||
}
|
||
|
||
// If user stylesheets are supported in the current process, inject the
|
||
// cosmetic filters now.
|
||
if (
|
||
supportsUserStylesheets &&
|
||
request.tabId !== undefined &&
|
||
request.frameId !== undefined
|
||
) {
|
||
let injected = [];
|
||
if ( out.simple.length !== 0 ) {
|
||
injected.push(out.simple.join(',\n'));
|
||
out.simple = [];
|
||
}
|
||
if ( out.complex.length !== 0 ) {
|
||
injected.push(out.complex.join(',\n'));
|
||
out.complex = [];
|
||
}
|
||
out.injected = injected.join(',\n');
|
||
vAPI.insertCSS(request.tabId, {
|
||
code: out.injected + '\n{display:none!important;}',
|
||
cssOrigin: 'user',
|
||
frameId: request.frameId,
|
||
runAt: 'document_start'
|
||
});
|
||
}
|
||
|
||
// Important: always clear used registers before leaving.
|
||
this.setRegister0.clear();
|
||
this.setRegister1.clear();
|
||
|
||
//console.timeEnd('cosmeticFilteringEngine.retrieveGenericSelectors');
|
||
|
||
return out;
|
||
};
|
||
|
||
/******************************************************************************/
|
||
|
||
FilterContainer.prototype.retrieveSpecificSelectors = function(
|
||
request,
|
||
options
|
||
) {
|
||
//console.time('cosmeticFilteringEngine.retrieveSpecificSelectors');
|
||
|
||
let hostname = request.hostname,
|
||
cacheEntry = this.selectorCache.get(hostname);
|
||
|
||
// https://github.com/chrisaljoudi/uBlock/issues/587
|
||
// out.ready will tell the content script the cosmetic filtering engine is
|
||
// up and ready.
|
||
|
||
// https://github.com/chrisaljoudi/uBlock/issues/497
|
||
// Generic exception filters are to be applied on all pages.
|
||
|
||
let out = {
|
||
ready: this.frozen,
|
||
hostname: hostname,
|
||
domain: request.domain,
|
||
declarativeFilters: [],
|
||
exceptionFilters: [],
|
||
hideNodeAttr: this.randomAlphaToken(),
|
||
hideNodeStyleSheetInjected: false,
|
||
highGenericHideSimple: '',
|
||
highGenericHideComplex: '',
|
||
injectedHideFilters: '',
|
||
networkFilters: '',
|
||
noDOMSurveying: this.hasGenericHide === false,
|
||
proceduralFilters: []
|
||
};
|
||
|
||
if ( options.noCosmeticFiltering !== true ) {
|
||
let entity = request.entity,
|
||
domainHash = makeHash(request.domain),
|
||
entityHash = entity !== '' ? makeHash(entity) : undefined;
|
||
|
||
// Exception cosmetic filters: prime with generic exception filters.
|
||
let exceptionSet = this.setRegister0;
|
||
// Genetic exceptions (should be extremely rare).
|
||
for ( let exception of this.genericDonthideSet ) {
|
||
exceptionSet.add(exception);
|
||
}
|
||
// Specific exception cosmetic filters.
|
||
let bucket = this.specificFilters.get(domainHash | 0b01);
|
||
if ( bucket !== undefined ) {
|
||
bucket.retrieve(hostname, exceptionSet);
|
||
}
|
||
bucket = this.specificFilters.get(domainHash | 0b11);
|
||
if ( bucket !== undefined ) {
|
||
bucket.retrieve(hostname, exceptionSet);
|
||
}
|
||
// Specific entity-based exception cosmetic filters.
|
||
if ( entityHash !== undefined ) {
|
||
bucket = this.specificFilters.get(entityHash | 0b01);
|
||
if ( bucket !== undefined ) {
|
||
bucket.retrieve(entity, exceptionSet);
|
||
}
|
||
bucket = this.specificFilters.get(entityHash | 0b11);
|
||
if ( bucket !== undefined ) {
|
||
bucket.retrieve(entity, exceptionSet);
|
||
}
|
||
}
|
||
// Special bucket for those filters without a valid
|
||
// domain name as per PSL.
|
||
bucket = this.specificFilters.get(0b01);
|
||
if ( bucket !== undefined ) {
|
||
bucket.retrieve(hostname, exceptionSet);
|
||
}
|
||
bucket = this.specificFilters.get(0b11);
|
||
if ( bucket !== undefined ) {
|
||
bucket.retrieve(hostname, exceptionSet);
|
||
}
|
||
if ( exceptionSet.size !== 0 ) {
|
||
out.exceptionFilters = Array.from(exceptionSet);
|
||
}
|
||
|
||
// Declarative cosmetic filters.
|
||
// TODO: Should I go one step further and store specific simple and
|
||
// specific complex in different collections? This could simplify
|
||
// slightly content script code.
|
||
let specificSet = this.setRegister1;
|
||
// Specific cosmetic filters.
|
||
bucket = this.specificFilters.get(domainHash | 0b00);
|
||
if ( bucket !== undefined ) {
|
||
bucket.retrieve(hostname, specificSet);
|
||
}
|
||
// Specific entity-based cosmetic filters.
|
||
if ( entityHash !== undefined ) {
|
||
bucket = this.specificFilters.get(entityHash | 0b00);
|
||
if ( bucket !== undefined ) {
|
||
bucket.retrieve(entity, specificSet);
|
||
}
|
||
}
|
||
// https://github.com/chrisaljoudi/uBlock/issues/188
|
||
// Special bucket for those filters without a valid domain name as per PSL
|
||
bucket = this.specificFilters.get(0b00);
|
||
if ( bucket !== undefined ) {
|
||
bucket.retrieve(hostname, specificSet);
|
||
}
|
||
// Cached cosmetic filters: these are always declarative.
|
||
if ( cacheEntry !== undefined ) {
|
||
cacheEntry.retrieve('cosmetic', specificSet);
|
||
if ( out.noDOMSurveying === false ) {
|
||
out.noDOMSurveying = cacheEntry.cosmeticSurveyingMissCount >
|
||
cosmeticSurveyingMissCountMax;
|
||
}
|
||
}
|
||
|
||
// Procedural cosmetic filters.
|
||
let proceduralSet = this.setRegister2;
|
||
// Specific cosmetic filters.
|
||
bucket = this.specificFilters.get(domainHash | 0b10);
|
||
if ( bucket !== undefined ) {
|
||
bucket.retrieve(hostname, proceduralSet);
|
||
}
|
||
// Specific entity-based cosmetic filters.
|
||
if ( entityHash !== undefined ) {
|
||
bucket = this.specificFilters.get(entityHash | 0b10);
|
||
if ( bucket !== undefined ) {
|
||
bucket.retrieve(entity, proceduralSet);
|
||
}
|
||
}
|
||
// https://github.com/chrisaljoudi/uBlock/issues/188
|
||
// Special bucket for those filters without a valid domain name as per PSL
|
||
bucket = this.specificFilters.get(0b10);
|
||
if ( bucket !== undefined ) {
|
||
bucket.retrieve(hostname, proceduralSet);
|
||
}
|
||
|
||
// Apply exceptions.
|
||
for ( let exception of exceptionSet ) {
|
||
specificSet.delete(exception);
|
||
proceduralSet.delete(exception);
|
||
}
|
||
if ( specificSet.size !== 0 ) {
|
||
out.declarativeFilters = Array.from(specificSet);
|
||
}
|
||
if ( proceduralSet.size !== 0 ) {
|
||
out.proceduralFilters = Array.from(proceduralSet);
|
||
}
|
||
|
||
// Highly generic cosmetic filters: sent once along with specific ones.
|
||
// A most-recent-used cache is used to skip computing the resulting set
|
||
// of high generics for a given set of exceptions.
|
||
// The resulting set of high generics is stored as a string, ready to
|
||
// be used as-is by the content script. The string is stored
|
||
// indirectly in the mru cache: this is to prevent duplication of the
|
||
// string in memory, which I have observed occurs when the string is
|
||
// stored directly as a value in a Map.
|
||
if ( options.noGenericCosmeticFiltering !== true ) {
|
||
let exceptionHash = out.exceptionFilters.join();
|
||
for ( let type in this.highlyGeneric ) {
|
||
let entry = this.highlyGeneric[type];
|
||
let str = entry.mru.lookup(exceptionHash);
|
||
if ( str === undefined ) {
|
||
str = { s: entry.str };
|
||
let genericSet = entry.dict;
|
||
let hit = false;
|
||
for ( let exception of exceptionSet ) {
|
||
if ( (hit = genericSet.has(exception)) ) { break; }
|
||
}
|
||
if ( hit ) {
|
||
genericSet = new Set(entry.dict);
|
||
for ( let exception of exceptionSet ) {
|
||
genericSet.delete(exception);
|
||
}
|
||
str.s = Array.from(genericSet).join(',\n');
|
||
}
|
||
entry.mru.add(exceptionHash, str);
|
||
}
|
||
out[entry.canonical] = str.s;
|
||
}
|
||
}
|
||
|
||
// Important: always clear used registers before leaving.
|
||
this.setRegister0.clear();
|
||
this.setRegister1.clear();
|
||
this.setRegister2.clear();
|
||
}
|
||
|
||
// CSS selectors for collapsible blocked elements
|
||
if ( cacheEntry ) {
|
||
let networkFilters = [];
|
||
cacheEntry.retrieve('net', networkFilters);
|
||
out.networkFilters = networkFilters.join(',\n');
|
||
}
|
||
|
||
// https://github.com/gorhill/uBlock/issues/3160
|
||
// If user stylesheets are supported in the current process, inject the
|
||
// cosmetic filters now.
|
||
if (
|
||
supportsUserStylesheets &&
|
||
request.tabId !== undefined &&
|
||
request.frameId !== undefined
|
||
) {
|
||
let injectedHideFilters = [];
|
||
if ( out.declarativeFilters.length !== 0 ) {
|
||
injectedHideFilters.push(out.declarativeFilters.join(',\n'));
|
||
out.declarativeFilters = [];
|
||
}
|
||
if ( out.proceduralFilters.length !== 0 ) {
|
||
injectedHideFilters.push('[' + out.hideNodeAttr + ']');
|
||
out.hideNodeStyleSheetInjected = true;
|
||
}
|
||
if ( out.highGenericHideSimple.length !== 0 ) {
|
||
injectedHideFilters.push(out.highGenericHideSimple);
|
||
out.highGenericHideSimple = '';
|
||
}
|
||
if ( out.highGenericHideComplex.length !== 0 ) {
|
||
injectedHideFilters.push(out.highGenericHideComplex);
|
||
out.highGenericHideComplex = '';
|
||
}
|
||
out.injectedHideFilters = injectedHideFilters.join(',\n');
|
||
let details = {
|
||
code: '',
|
||
cssOrigin: 'user',
|
||
frameId: request.frameId,
|
||
runAt: 'document_start'
|
||
};
|
||
if ( out.injectedHideFilters.length !== 0 ) {
|
||
details.code = out.injectedHideFilters + '\n{display:none!important;}';
|
||
vAPI.insertCSS(request.tabId, details);
|
||
}
|
||
if ( out.networkFilters.length !== 0 ) {
|
||
details.code = out.networkFilters + '\n{display:none!important;}';
|
||
vAPI.insertCSS(request.tabId, details);
|
||
out.networkFilters = '';
|
||
}
|
||
}
|
||
|
||
//console.timeEnd('cosmeticFilteringEngine.retrieveSpecificSelectors');
|
||
|
||
return out;
|
||
};
|
||
|
||
/******************************************************************************/
|
||
|
||
FilterContainer.prototype.getFilterCount = function() {
|
||
return this.acceptedCount - this.discardedCount;
|
||
};
|
||
|
||
/******************************************************************************/
|
||
|
||
return new FilterContainer();
|
||
|
||
/******************************************************************************/
|
||
|
||
})();
|
||
|
||
/******************************************************************************/
|