mirror of
https://github.com/gorhill/uBlock.git
synced 2024-11-07 11:22:38 +01:00
6dbbb95b04
Related issues: - https://github.com/uBlockOrigin/uBOL-issues/issues/5#issuecomment-1575425913 - https://github.com/w3c/webextensions/issues/403 Currently, there is no other way to inject CSS user styles than to wake up the service worker, so that it can inject the CSS styles itself using the `scripting.insertCSS()` method. If ever the MV3 API supports injecting CSS user styles directly from a content script, uBOL will be back to be fully declarative. At this point the service worker is very lightweight since the filtering is completely declarative, so this is not too much of an issue performance-wise except for the fact that waking up the service worker for the sole purpose of injecting CSS user styles and nothing else introduces a pointless overhead. Hopefully the MV3 API will mature to address such inefficiency.
121 lines
4.1 KiB
JavaScript
121 lines
4.1 KiB
JavaScript
/*******************************************************************************
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uBlock Origin - a browser extension to block requests.
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Copyright (C) 2019-present 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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/* jshint esversion:11 */
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'use strict';
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/******************************************************************************/
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// Important!
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// Isolate from global scope
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(function uBOL_cssSpecific() {
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/******************************************************************************/
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const specificImports = self.specificImports || [];
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self.specificImports = undefined;
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delete self.specificImports;
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/******************************************************************************/
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const hnParts = [];
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try { hnParts.push(...document.location.hostname.split('.')); }
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catch(ex) { }
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const hnpartslen = hnParts.length;
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if ( hnpartslen === 0 ) { return; }
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const selectors = [];
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for ( const { argsList, exceptionsMap, hostnamesMap, entitiesMap } of specificImports ) {
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const todoIndices = new Set();
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const tonotdoIndices = [];
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// Exceptions
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if ( exceptionsMap.size !== 0 ) {
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for ( let i = 0; i < hnpartslen; i++ ) {
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const hn = hnParts.slice(i).join('.');
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const excepted = exceptionsMap.get(hn);
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if ( excepted ) { tonotdoIndices.push(...excepted); }
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}
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exceptionsMap.clear();
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}
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// Hostname-based
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if ( hostnamesMap.size !== 0 ) {
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const collectArgIndices = hn => {
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let argsIndices = hostnamesMap.get(hn);
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if ( argsIndices === undefined ) { return; }
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if ( typeof argsIndices === 'number' ) { argsIndices = [ argsIndices ]; }
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for ( const argsIndex of argsIndices ) {
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if ( tonotdoIndices.includes(argsIndex) ) { continue; }
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todoIndices.add(argsIndex);
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}
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};
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for ( let i = 0; i < hnpartslen; i++ ) {
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const hn = hnParts.slice(i).join('.');
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collectArgIndices(hn);
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}
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collectArgIndices('*');
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hostnamesMap.clear();
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}
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// Entity-based
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if ( entitiesMap.size !== 0 ) {
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const n = hnpartslen - 1;
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for ( let i = 0; i < n; i++ ) {
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for ( let j = n; j > i; j-- ) {
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const en = hnParts.slice(i,j).join('.');
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let argsIndices = entitiesMap.get(en);
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if ( argsIndices === undefined ) { continue; }
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if ( typeof argsIndices === 'number' ) { argsIndices = [ argsIndices ]; }
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for ( const argsIndex of argsIndices ) {
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if ( tonotdoIndices.includes(argsIndex) ) { continue; }
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todoIndices.add(argsIndex);
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}
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}
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}
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entitiesMap.clear();
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}
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for ( const i of todoIndices ) {
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selectors.push(argsList[i]);
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}
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argsList.length = 0;
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}
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specificImports.length = 0;
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if ( selectors.length === 0 ) { return; }
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/******************************************************************************/
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(function uBOL_injectCSS(css, count = 10) {
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chrome.runtime.sendMessage({ what: 'insertCSS', css }).catch(( ) => {
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count -= 1;
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if ( count === 0 ) { return; }
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uBOL_injectCSS(css, count - 1);
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});
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})(`${selectors.join(',')}{display:none!important;}`);
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/******************************************************************************/
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})();
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/******************************************************************************/
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void 0;
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