Files
dash-to-panel/convenience.js
2016-09-21 00:18:00 +00:00

104 lines
2.9 KiB
JavaScript

/*
* Taskbar: A taskbar extension for the Gnome panel.
* Copyright (C) 2016 Zorin OS
*
* 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/>.
*
*
* Credits:
* This file is based on code from the Dash to Dock extension by micheleg.
* Some code was also adapted from the upstream Gnome Shell source code.
*/
const Lang = imports.lang;
// simplify global signals and function injections handling
// abstract class
const BasicHandler = new Lang.Class({
Name: 'Taskbar.BasicHandler',
_init: function(){
this._storage = new Object();
},
add: function(/*unlimited 3-long array arguments*/){
// convert arguments object to array, concatenate with generic
let args = Array.concat('generic', Array.slice(arguments));
// call addWithLabel with ags as if they were passed arguments
this.addWithLabel.apply(this, args);
},
destroy: function() {
for( let label in this._storage )
this.removeWithLabel(label);
},
addWithLabel: function( label /* plus unlimited 3-long array arguments*/) {
if(this._storage[label] == undefined)
this._storage[label] = new Array();
// skip first element of the arguments
for( let i = 1; i < arguments.length; i++ ) {
this._storage[label].push( this._create(arguments[i]) );
}
},
removeWithLabel: function(label){
if(this._storage[label]) {
for( let i = 0; i < this._storage[label].length; i++ ) {
this._remove(this._storage[label][i]);
}
delete this._storage[label];
}
},
/* Virtual methods to be implemented by subclass */
// create single element to be stored in the storage structure
_create: function(item){
throw new Error('no implementation of _create in ' + this);
},
// correctly delete single element
_remove: function(item){
throw new Error('no implementation of _remove in ' + this);
}
});
// Manage global signals
const GlobalSignalsHandler = new Lang.Class({
Name: 'Taskbar.GlobalSignalsHandler',
Extends: BasicHandler,
_create: function(item) {
let object = item[0];
let event = item[1];
let callback = item[2]
let id = object.connect(event, callback);
return [object, id];
},
_remove: function(item){
item[0].disconnect(item[1]);
}
});