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mirror of https://github.com/gorhill/uBlock.git synced 2024-09-15 23:42:28 +02:00
uBlock/platform/mv3/extension/js/scripting/css-specific.entity.js
Raymond Hill cbfd2ad942
Create a MVP version of uBOLite for Firefox
What does not work at the time of commit:

Cosmetic filtering does not work:

The content scripts responsible for cosmetic filtering fail when
trying to inject the stylesheets through document.adoptedStyleSheets,
with the following error message:

  XrayWrapper denied access to property Symbol.iterator
  (reason: object is not safely Xrayable).
  See https://developer.mozilla.org/en-US/docs/Xray_vision for more
  information. ... css-declarative.js:106:8

A possible solution is to inject those content scripts in the
MAIN world. However Firefox scripting API does not support MAIN
world injection at the moment.

Scriptlet-filtering does not work:

Because scriptlet code needs to be injected in the MAIN world,
and this is currently not supported by Firefox's scripting API,
see https://bugzilla.mozilla.org/show_bug.cgi?id=1736575

There is no count badge on the toolbar icon in Firefox, as it
currently does not support the `DNR.setExtensionActionOptions`
method.

Other than the above issues, it does appear uBO is blocking
properly with no error reported in the dev console.

The adoptedStyleSheets issue though is worrisome, as the
cosmetic filtering content scripts were designed with ISOLATED
world injection in mind. Being forced to inject in MAIN world
(when available) make things a bit more complicated as uBO
has to ensure it's global variables do not leak into the page.
2023-04-07 10:19:43 -04:00

86 lines
2.7 KiB
JavaScript

/*******************************************************************************
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
*/
/* jshint esversion:11 */
'use strict';
/******************************************************************************/
// Important!
// Isolate from global scope
(function uBOL_cssSpecificEntity() {
/******************************************************************************/
// $rulesetId$
const specificEntityImports = self.specificEntityImports || [];
delete self.specificEntityImports;
/******************************************************************************/
const lookupSelectors = (hn, entity, out) => {
for ( const { argsList, entitiesMap } of specificEntityImports ) {
let argsIndices = entitiesMap.get(entity);
if ( argsIndices === undefined ) { continue; }
if ( typeof argsIndices === 'number' ) { argsIndices = [ argsIndices ]; }
for ( const argsIndex of argsIndices ) {
const details = argsList[argsIndex];
if ( details.n && details.n.includes(hn) ) { continue; }
out.push(details.a);
}
}
};
let hn = '';
try { hn = document.location.hostname; } catch(ex) { }
const selectors = [];
const hnparts = hn.split('.');
const hnpartslen = hnparts.length - 1;
for ( let i = 0; i < hnpartslen; i++ ) {
for ( let j = hnpartslen; j > i; j-- ) {
lookupSelectors(
hnparts.slice(i).join('.'),
hnparts.slice(i,j).join('.'),
selectors
);
}
}
if ( selectors.length === 0 ) { return; }
try {
const sheet = new CSSStyleSheet();
sheet.replace(`@layer{${selectors.join(',')}{display:none!important;}}`);
document.adoptedStyleSheets = [
...document.adoptedStyleSheets,
sheet
];
} catch(ex) {
}
/******************************************************************************/
})();
/******************************************************************************/