uBlock/platform/webext/vapi-usercss.js

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/*******************************************************************************
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: '',
_disabled: false,
_send: function(toRemove, toAdd) {
vAPI.messaging.send('vapi-background', {
what: 'userCSS',
toRemove: toRemove,
toAdd: toAdd
});
},
add: function(cssText) {
if ( cssText === '' ) { return; }
var before = this._userCSS,
after = before;
if ( after !== '' ) { after += '\n'; }
after += cssText;
this._userCSS = after;
if ( this._disabled ) { return; }
this._send(before, after);
},
remove: function(cssText) {
if ( cssText === '' || this._userCSS === '' ) { return; }
var before = this._userCSS,
after = before;
after = before.replace(cssText, '').trim();
this._userCSS = after;
if ( this._disabled ) { return; }
this._send(before, after);
},
toggle: function(state) {
if ( state === undefined ) {
state = this._disabled;
}
if ( state !== this._disabled ) { return; }
this._disabled = !state;
if ( this._userCSS === '' ) { return; }
var toAdd, toRemove;
if ( state ) {
toAdd = this._userCSS;
} else {
toRemove = this._userCSS;
}
this._send(toRemove, toAdd);
}
};
vAPI.hideNode = vAPI.unhideNode = function(){};
})();