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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 { registerScriptlet } from './base.js';
/******************************************************************************/
// Externally added to the private namespace in which scriptlets execute.
/* global scriptletGlobals */
export function safeSelf() {
if ( scriptletGlobals.safeSelf ) {
return scriptletGlobals.safeSelf;
}
const self = globalThis;
const safe = {
'Array_from': Array.from,
'Error': self.Error,
'Function_toStringFn': self.Function.prototype.toString,
'Function_toString': thisArg => safe.Function_toStringFn.call(thisArg),
'Math_floor': Math.floor,
'Math_max': Math.max,
'Math_min': Math.min,
'Math_random': Math.random,
'Object': Object,
'Object_defineProperty': Object.defineProperty.bind(Object),
'Object_defineProperties': Object.defineProperties.bind(Object),
'Object_fromEntries': Object.fromEntries.bind(Object),
'Object_getOwnPropertyDescriptor': Object.getOwnPropertyDescriptor.bind(Object),
'Object_hasOwn': Object.hasOwn.bind(Object),
'RegExp': self.RegExp,
'RegExp_test': self.RegExp.prototype.test,
'RegExp_exec': self.RegExp.prototype.exec,
'Request_clone': self.Request.prototype.clone,
'String': self.String,
'String_fromCharCode': String.fromCharCode,
'String_split': String.prototype.split,
'XMLHttpRequest': self.XMLHttpRequest,
'addEventListener': self.EventTarget.prototype.addEventListener,
'removeEventListener': self.EventTarget.prototype.removeEventListener,
'fetch': self.fetch,
'JSON': self.JSON,
'JSON_parseFn': self.JSON.parse,
'JSON_stringifyFn': self.JSON.stringify,
'JSON_parse': (...args) => safe.JSON_parseFn.call(safe.JSON, ...args),
'JSON_stringify': (...args) => safe.JSON_stringifyFn.call(safe.JSON, ...args),
'log': console.log.bind(console),
// Properties
logLevel: 0,
// Methods
makeLogPrefix(...args) {
return this.sendToLogger && `[${args.join(' \u205D ')}]` || '';
},
uboLog(...args) {
if ( this.sendToLogger === undefined ) { return; }
if ( args === undefined || args[0] === '' ) { return; }
return this.sendToLogger('info', ...args);
},
uboErr(...args) {
if ( this.sendToLogger === undefined ) { return; }
if ( args === undefined || args[0] === '' ) { return; }
return this.sendToLogger('error', ...args);
},
escapeRegexChars(s) {
return s.replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
},
initPattern(pattern, options = {}) {
if ( pattern === '' ) {
return { matchAll: true, expect: true };
}
const expect = (options.canNegate !== true || pattern.startsWith('!') === false);
if ( expect === false ) {
pattern = pattern.slice(1);
}
const match = /^\/(.+)\/([gimsu]*)$/.exec(pattern);
if ( match !== null ) {
return {
re: new this.RegExp(
match[1],
match[2] || options.flags
),
expect,
};
}
if ( options.flags !== undefined ) {
return {
re: new this.RegExp(this.escapeRegexChars(pattern),
options.flags
),
expect,
};
}
return { pattern, expect };
},
testPattern(details, haystack) {
if ( details.matchAll ) { return true; }
if ( details.re ) {
return this.RegExp_test.call(details.re, haystack) === details.expect;
}
return haystack.includes(details.pattern) === details.expect;
},
patternToRegex(pattern, flags = undefined, verbatim = false) {
if ( pattern === '' ) { return /^/; }
const match = /^\/(.+)\/([gimsu]*)$/.exec(pattern);
if ( match === null ) {
const reStr = this.escapeRegexChars(pattern);
return new RegExp(verbatim ? `^${reStr}$` : reStr, flags);
}
try {
return new RegExp(match[1], match[2] || undefined);
}
catch {
}
return /^/;
},
getExtraArgs(args, offset = 0) {
const entries = args.slice(offset).reduce((out, v, i, a) => {
if ( (i & 1) === 0 ) {
const rawValue = a[i+1];
const value = /^\d+$/.test(rawValue)
? parseInt(rawValue, 10)
: rawValue;
out.push([ a[i], value ]);
}
return out;
}, []);
return this.Object_fromEntries(entries);
},
onIdle(fn, options) {
if ( self.requestIdleCallback ) {
return self.requestIdleCallback(fn, options);
}
return self.requestAnimationFrame(fn);
},
offIdle(id) {
if ( self.requestIdleCallback ) {
return self.cancelIdleCallback(id);
}
return self.cancelAnimationFrame(id);
}
};
scriptletGlobals.safeSelf = safe;
if ( scriptletGlobals.bcSecret === undefined ) { return safe; }
// This is executed only when the logger is opened
safe.logLevel = scriptletGlobals.logLevel || 1;
let lastLogType = '';
let lastLogText = '';
let lastLogTime = 0;
safe.toLogText = (type, ...args) => {
if ( args.length === 0 ) { return; }
const text = `[${document.location.hostname || document.location.href}]${args.join(' ')}`;
if ( text === lastLogText && type === lastLogType ) {
if ( (Date.now() - lastLogTime) < 5000 ) { return; }
}
lastLogType = type;
lastLogText = text;
lastLogTime = Date.now();
return text;
};
try {
const bc = new self.BroadcastChannel(scriptletGlobals.bcSecret);
let bcBuffer = [];
safe.sendToLogger = (type, ...args) => {
const text = safe.toLogText(type, ...args);
if ( text === undefined ) { return; }
if ( bcBuffer === undefined ) {
return bc.postMessage({ what: 'messageToLogger', type, text });
}
bcBuffer.push({ type, text });
};
bc.onmessage = ev => {
const msg = ev.data;
switch ( msg ) {
case 'iamready!':
if ( bcBuffer === undefined ) { break; }
bcBuffer.forEach(({ type, text }) =>
bc.postMessage({ what: 'messageToLogger', type, text })
);
bcBuffer = undefined;
break;
case 'setScriptletLogLevelToOne':
safe.logLevel = 1;
break;
case 'setScriptletLogLevelToTwo':
safe.logLevel = 2;
break;
}
};
bc.postMessage('areyouready?');
} catch {
safe.sendToLogger = (type, ...args) => {
const text = safe.toLogText(type, ...args);
if ( text === undefined ) { return; }
safe.log(`uBO ${text}`);
};
}
return safe;
}
registerScriptlet(safeSelf, {
name: 'safe-self.fn',
});
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