mirror of
https://github.com/gorhill/uBlock.git
synced 2024-10-06 09:37:12 +02:00
2a40e67577
Fixed trusted sites not being excluded from declarative scripting. Assign "uBOL_"-prefixed name to anonymous scripting functions so that they can be easily found in performance profiler results in dev tools. Imrpove spread of chunks of filters across declarative scripting files.
205 lines
6.3 KiB
JavaScript
205 lines
6.3 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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The scriptlets below are meant to be injected only into a
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web page context.
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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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/// name set-constant
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/// alias set
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/******************************************************************************/
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// Important!
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// Isolate from global scope
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(function uBOL_setConstant() {
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/******************************************************************************/
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// $rulesetId$
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const argsMap = new Map(self.$argsMap$);
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const hostnamesMap = new Map(self.$hostnamesMap$);
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/******************************************************************************/
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const scriptlet = (
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chain = '',
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cValue = ''
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) => {
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if ( chain === '' ) { return; }
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if ( cValue === 'undefined' ) {
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cValue = undefined;
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} else if ( cValue === 'false' ) {
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cValue = false;
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} else if ( cValue === 'true' ) {
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cValue = true;
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} else if ( cValue === 'null' ) {
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cValue = null;
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} else if ( cValue === "''" ) {
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cValue = '';
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} else if ( cValue === '[]' ) {
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cValue = [];
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} else if ( cValue === '{}' ) {
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cValue = {};
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} else if ( cValue === 'noopFunc' ) {
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cValue = function(){};
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} else if ( cValue === 'trueFunc' ) {
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cValue = function(){ return true; };
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} else if ( cValue === 'falseFunc' ) {
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cValue = function(){ return false; };
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} else if ( /^\d+$/.test(cValue) ) {
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cValue = parseFloat(cValue);
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if ( isNaN(cValue) ) { return; }
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if ( Math.abs(cValue) > 0x7FFF ) { return; }
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} else {
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return;
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}
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let aborted = false;
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const mustAbort = function(v) {
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if ( aborted ) { return true; }
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aborted =
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(v !== undefined && v !== null) &&
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(cValue !== undefined && cValue !== null) &&
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(typeof v !== typeof cValue);
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return aborted;
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};
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// https://github.com/uBlockOrigin/uBlock-issues/issues/156
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// Support multiple trappers for the same property.
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const trapProp = function(owner, prop, configurable, handler) {
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if ( handler.init(owner[prop]) === false ) { return; }
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const odesc = Object.getOwnPropertyDescriptor(owner, prop);
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let prevGetter, prevSetter;
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if ( odesc instanceof Object ) {
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owner[prop] = cValue;
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if ( odesc.get instanceof Function ) {
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prevGetter = odesc.get;
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}
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if ( odesc.set instanceof Function ) {
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prevSetter = odesc.set;
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}
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}
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try {
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Object.defineProperty(owner, prop, {
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configurable,
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get() {
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if ( prevGetter !== undefined ) {
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prevGetter();
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}
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return handler.getter(); // cValue
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},
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set(a) {
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if ( prevSetter !== undefined ) {
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prevSetter(a);
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}
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handler.setter(a);
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}
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});
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} catch(ex) {
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}
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};
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const trapChain = function(owner, chain) {
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const pos = chain.indexOf('.');
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if ( pos === -1 ) {
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trapProp(owner, chain, false, {
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v: undefined,
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init: function(v) {
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if ( mustAbort(v) ) { return false; }
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this.v = v;
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return true;
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},
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getter: function() {
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return cValue;
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},
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setter: function(a) {
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if ( mustAbort(a) === false ) { return; }
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cValue = a;
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}
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});
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return;
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}
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const prop = chain.slice(0, pos);
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const v = owner[prop];
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chain = chain.slice(pos + 1);
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if ( v instanceof Object || typeof v === 'object' && v !== null ) {
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trapChain(v, chain);
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return;
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}
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trapProp(owner, prop, true, {
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v: undefined,
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init: function(v) {
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this.v = v;
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return true;
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},
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getter: function() {
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return this.v;
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},
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setter: function(a) {
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this.v = a;
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if ( a instanceof Object ) {
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trapChain(a, chain);
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}
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}
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});
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};
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trapChain(window, chain);
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};
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/******************************************************************************/
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let hn;
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try { hn = document.location.hostname; } catch(ex) { }
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while ( hn ) {
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if ( hostnamesMap.has(hn) ) {
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let argsHashes = hostnamesMap.get(hn);
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if ( typeof argsHashes === 'number' ) { argsHashes = [ argsHashes ]; }
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for ( const argsHash of argsHashes ) {
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const details = argsMap.get(argsHash);
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if ( details.n && details.n.includes(hn) ) { continue; }
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try { scriptlet(...details.a); } catch(ex) {}
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}
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}
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if ( hn === '*' ) { break; }
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const pos = hn.indexOf('.');
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if ( pos !== -1 ) {
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hn = hn.slice(pos + 1);
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} else {
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hn = '*';
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}
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}
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/******************************************************************************/
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argsMap.clear();
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hostnamesMap.clear();
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/******************************************************************************/
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})();
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/******************************************************************************/
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