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const Lang = imports.lang;
const Main = imports.ui.main;
const ComponentManager = new Lang.Class({
Name: 'ComponentManager',
_init: function() {
this._allComponents = {};
this._enabledComponents = [];
Main.sessionMode.connect('updated', Lang.bind(this, this._sessionUpdated));
this._sessionUpdated();
},
_sessionUpdated: function() {
let newEnabledComponents = Main.sessionMode.components;
newEnabledComponents.filter(Lang.bind(this, function(name) {
return this._enabledComponents.indexOf(name) == -1;
})).forEach(Lang.bind(this, function(name) {
this._enableComponent(name);
}));
this._enabledComponents.filter(Lang.bind(this, function(name) {
return newEnabledComponents.indexOf(name) == -1;
})).forEach(Lang.bind(this, function(name) {
this._disableComponent(name);
}));
this._enabledComponents = newEnabledComponents;
},
_importComponent: function(name) {
let module = imports.ui.components[name];
return module.Component;
},
_ensureComponent: function(name) {
let component = this._allComponents[name];
if (component)
return component;
if (Main.sessionMode.isLocked)
return null;
let constructor = this._importComponent(name);
component = new constructor();
this._allComponents[name] = component;
return component;
},
_enableComponent: function(name) {
let component = this._ensureComponent(name);
if (component)
component.enable();
},
_disableComponent: function(name) {
let component = this._allComponents[name];
if (component == null)
return;
component.disable();
}
});
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