uBlock/src/js/cosmetic-on.js

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/*******************************************************************************
uBlock - a browser extension to block requests.
Copyright (C) 2015 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
*/
/* global vAPI, HTMLDocument */
/******************************************************************************/
(function() {
'use strict';
/******************************************************************************/
// https://github.com/gorhill/uBlock/issues/464
if ( document instanceof HTMLDocument === false ) {
//console.debug('cosmetic-on.js > not a HTLMDocument');
return;
}
// This can happen
2015-04-08 01:34:22 +02:00
if ( !vAPI ) {
//console.debug('cosmetic-on.js > no vAPI');
return;
}
/******************************************************************************/
var styles = vAPI.styles;
if ( Array.isArray(styles) === false ) {
return;
}
/******************************************************************************/
// Insert all cosmetic filtering-related style tags in the DOM
var selectors = [];
var reProperties = /\s*\{[^}]+\}\s*/;
var style, i;
var parent = document.head || document.body || document.documentElement;
i = styles.length;
while ( i-- ) {
style = styles[i];
if ( style.parentElement !== null ) {
continue;
}
if ( parent === null ) {
continue;
}
selectors.push(style.textContent.replace(reProperties, ''));
parent.appendChild(style);
}
// Add `display: none !important` attribute
if ( selectors.length === 0 ) {
return;
}
var elems = [];
try {
elems = document.querySelectorAll(selectors.join(','));
} catch (e) {
}
i = elems.length;
while ( i-- ) {
style = elems[i].style;
if ( typeof style === 'object' || typeof style.removeProperty === 'function' ) {
style.setProperty('display', 'none', 'important');
}
}
/******************************************************************************/
})();
/******************************************************************************/