uBlock/platform/webext/vapi-usercss.js

63 lines
2.2 KiB
JavaScript

/*******************************************************************************
uBlock Origin - a browser extension to block requests.
Copyright (C) 2017 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
*/
'use strict';
// For content pages
/******************************************************************************/
(function() {
if ( typeof vAPI !== 'object' ) { return; }
vAPI.userCSS = {
_userCSS: new Set(),
_disabled: false,
_send: function(add, css) {
vAPI.messaging.send('vapi-background', {
what: 'userCSS',
add: add,
css: css
});
},
add: function(cssText) {
if ( cssText === '' || this._userCSS.has(cssText) ) { return; }
this._userCSS.add(cssText);
if ( this._disabled ) { return; }
this._send(true, cssText);
},
remove: function(cssText) {
if ( cssText === '' ) { return; }
if ( this._userCSS.delete(cssText) && !this._disabled ) {
this._send(true, cssText);
this._send(false, cssText);
}
},
toggle: function(state) {
if ( state === undefined ) { state = this._disabled; }
if ( state !== this._disabled ) { return; }
this._disabled = !state;
if ( this._userCSS.size === 0 ) { return; }
this._send(state, Array.from(this._userCSS));
}
};
vAPI.hideNode = vAPI.unhideNode = function(){};
})();