uBlock/platform/mv3/scriptlets/no-setinterval-if.js

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/*******************************************************************************
uBlock Origin - a browser extension to block requests.
Copyright (C) 2019-present Raymond Hill
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see {http://www.gnu.org/licenses/}.
Home: https://github.com/gorhill/uBlock
The scriptlets below are meant to be injected only into a
web page context.
*/
/* jshint esversion:11 */
'use strict';
/******************************************************************************/
/// name no-setinterval-if
/// alias no-setInterval-if
/// alias nosiif
/******************************************************************************/
// Important!
// Isolate from global scope
(function uBOL_noSetIntervalIf() {
/******************************************************************************/
// $rulesetId$
const argsList = self.$argsList$;
const hostnamesMap = new Map(self.$hostnamesMap$);
/******************************************************************************/
const scriptlet = (
needle = '',
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delay = ''
) => {
const needleNot = needle.charAt(0) === '!';
if ( needleNot ) { needle = needle.slice(1); }
if ( delay === '' ) { delay = undefined; }
let delayNot = false;
if ( delay !== undefined ) {
delayNot = delay.charAt(0) === '!';
if ( delayNot ) { delay = delay.slice(1); }
delay = parseInt(delay, 10);
}
if ( needle.startsWith('/') && needle.endsWith('/') ) {
needle = needle.slice(1,-1);
} else if ( needle !== '' ) {
needle = needle.replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
}
const reNeedle = new RegExp(needle);
const regexpTest = RegExp.prototype.test;
self.setInterval = new Proxy(self.setInterval, {
apply: function(target, thisArg, args) {
const a = String(args[0]);
const b = args[1];
let defuse;
if ( needle !== '' ) {
defuse = regexpTest.call(reNeedle, a) !== needleNot;
}
if ( defuse !== false && delay !== undefined ) {
defuse = (b === delay || isNaN(b) && isNaN(delay) ) !== delayNot;
}
if ( defuse ) {
args[0] = function(){};
}
return target.apply(thisArg, args);
}
});
};
/******************************************************************************/
let hn;
try { hn = document.location.hostname; } catch(ex) { }
while ( hn ) {
if ( hostnamesMap.has(hn) ) {
let argsIndices = hostnamesMap.get(hn);
if ( typeof argsIndices === 'number' ) { argsIndices = [ argsIndices ]; }
for ( const argsIndex of argsIndices ) {
const details = argsList[argsIndex];
if ( details.n && details.n.includes(hn) ) { continue; }
try { scriptlet(...details.a); } catch(ex) {}
}
}
if ( hn === '*' ) { break; }
const pos = hn.indexOf('.');
if ( pos !== -1 ) {
hn = hn.slice(pos + 1);
} else {
hn = '*';
}
}
argsList.length = 0;
hostnamesMap.clear();
/******************************************************************************/
})();
/******************************************************************************/