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/*******************************************************************************
uBlock Origin - a comprehensive, efficient content blocker
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
*/
import { proxyApplyFn } from './proxy-apply.js';
import { registerScriptlet } from './base.js';
import { safeSelf } from './safe-self.js';
/******************************************************************************/
class RangeParser {
constructor(s) {
this.not = s.charAt(0) === '!';
if ( this.not ) { s = s.slice(1); }
if ( s === '' ) { return; }
const pos = s.indexOf('-');
if ( pos !== 0 ) {
this.min = this.max = parseInt(s, 10) || 0;
}
if ( pos !== -1 ) {
this.max = parseInt(s.slice(pos + 1), 10) || Number.MAX_SAFE_INTEGER;
}
}
unbound() {
return this.min === undefined && this.max === undefined;
}
test(v) {
const n = Math.min(Math.max(Number(v) || 0, 0), Number.MAX_SAFE_INTEGER);
if ( this.min === this.max ) {
return (this.min === undefined || n === this.min) !== this.not;
}
if ( this.min === undefined ) {
return (n <= this.max) !== this.not;
}
if ( this.max === undefined ) {
return (n >= this.min) !== this.not;
}
return (n >= this.min && n <= this.max) !== this.not;
}
}
registerScriptlet(RangeParser, {
name: 'range-parser.fn',
});
/**
* @scriptlet prevent-setTimeout
*
* @description
* Conditionally prevent execution of the callback function passed to native
* setTimeout method. With no parameters, all calls to setTimeout will be
* shown in the logger.
*
* @param [needle]
* A pattern to match against the stringified callback. The pattern can be a
* plain string, or a regex. Prepend with `!` to reverse the match condition.
*
* @param [delay]
* A value to match against the delay. Can be a single value for exact match,
* or a range:
* - `min-max`: matches if delay >= min and delay <= max
* - `min-`: matches if delay >= min
* - `-max`: matches if delay <= max
* No delay means to match any delay value.
* Prepend with `!` to reverse the match condition.
*
* */
export function preventSetTimeout(
needleRaw = '',
delayRaw = ''
) {
const safe = safeSelf();
const logPrefix = safe.makeLogPrefix('prevent-setTimeout', needleRaw, delayRaw);
const needleNot = needleRaw.charAt(0) === '!';
const reNeedle = safe.patternToRegex(needleNot ? needleRaw.slice(1) : needleRaw);
const range = new RangeParser(delayRaw);
proxyApplyFn('setTimeout', function(context) {
const { callArgs } = context;
const a = callArgs[0] instanceof Function
? safe.String(safe.Function_toString(callArgs[0]))
: safe.String(callArgs[0]);
const b = callArgs[1];
if ( needleRaw === '' && range.unbound() ) {
safe.uboLog(logPrefix, `Called:\n${a}\n${b}`);
return context.reflect();
}
if ( reNeedle.test(a) !== needleNot && range.test(b) ) {
callArgs[0] = function(){};
safe.uboLog(logPrefix, `Prevented:\n${a}\n${b}`);
}
return context.reflect();
});
}
registerScriptlet(preventSetTimeout, {
name: 'prevent-setTimeout.js',
aliases: [
'no-setTimeout-if.js',
'nostif.js',
'setTimeout-defuser.js',
],
dependencies: [
proxyApplyFn,
RangeParser,
safeSelf,
],
});
/**
* @scriptlet prevent-setInterval
*
* @description
* Conditionally prevent execution of the callback function passed to native
* setInterval method. With no parameters, all calls to setInterval will be
* shown in the logger.
*
* @param [needle]
* A pattern to match against the stringified callback. The pattern can be a
* plain string, or a regex. Prepend with `!` to reverse the match condition.
* No pattern means to match anything.
*
* @param [delay]
* A value to match against the delay. Can be a single value for exact match,
* or a range:
* - `min-max`: matches if delay >= min and delay <= max
* - `min-`: matches if delay >= min
* - `-max`: matches if delay <= max
* No delay means to match any delay value.
* Prepend with `!` to reverse the match condition.
*
* */
export function preventSetInterval(
needleRaw = '',
delayRaw = ''
) {
const safe = safeSelf();
const logPrefix = safe.makeLogPrefix('prevent-setInterval', needleRaw, delayRaw);
const needleNot = needleRaw.charAt(0) === '!';
const reNeedle = safe.patternToRegex(needleNot ? needleRaw.slice(1) : needleRaw);
const range = new RangeParser(delayRaw);
proxyApplyFn('setInterval', function(context) {
const { callArgs } = context;
const a = callArgs[0] instanceof Function
? safe.String(safe.Function_toString(callArgs[0]))
: safe.String(callArgs[0]);
const b = callArgs[1];
if ( needleRaw === '' && range.unbound() ) {
safe.uboLog(logPrefix, `Called:\n${a}\n${b}`);
return context.reflect();
}
if ( reNeedle.test(a) !== needleNot && range.test(b) ) {
callArgs[0] = function(){};
safe.uboLog(logPrefix, `Prevented:\n${a}\n${b}`);
}
return context.reflect();
});
}
registerScriptlet(preventSetInterval, {
name: 'prevent-setInterval.js',
aliases: [
'no-setInterval-if.js',
'nosiif.js',
'setInterval-defuser.js',
],
dependencies: [
proxyApplyFn,
RangeParser,
safeSelf,
],
});
/**
* @scriptlet prevent-requestAnimationFrame
*
* @description
* Conditionally prevent execution of the callback function passed to native
* requestAnimationFrame method. With no parameters, all calls to
* requestAnimationFrame will be shown in the logger.
*
* @param [needle]
* A pattern to match against the stringified callback. The pattern can be a
* plain string, or a regex.
* Prepend with `!` to reverse the match condition.
*
* */
export function preventRequestAnimationFrame(
needleRaw = ''
) {
const safe = safeSelf();
const logPrefix = safe.makeLogPrefix('prevent-requestAnimationFrame', needleRaw);
const needleNot = needleRaw.charAt(0) === '!';
const reNeedle = safe.patternToRegex(needleNot ? needleRaw.slice(1) : needleRaw);
proxyApplyFn('requestAnimationFrame', function(context) {
const { callArgs } = context;
const a = callArgs[0] instanceof Function
? safe.String(safe.Function_toString(callArgs[0]))
: safe.String(callArgs[0]);
if ( needleRaw === '' ) {
safe.uboLog(logPrefix, `Called:\n${a}`);
} else if ( reNeedle.test(a) !== needleNot ) {
callArgs[0] = function(){};
safe.uboLog(logPrefix, `Prevented:\n${a}`);
}
return context.reflect();
});
}
registerScriptlet(preventRequestAnimationFrame, {
name: 'prevent-requestAnimationFrame.js',
aliases: [
'no-requestAnimationFrame-if.js',
'norafif.js',
],
dependencies: [
proxyApplyFn,
safeSelf,
],
});
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