HandlerRegistry.js [plain text]
WebInspector.HandlerRegistry = function(setting)
{
WebInspector.Object.call(this);
this._handlers = {};
this._setting = setting;
this._activeHandler = this._setting.get();
}
WebInspector.HandlerRegistry.prototype = {
get handlerNames()
{
return Object.getOwnPropertyNames(this._handlers);
},
get activeHandler()
{
return this._activeHandler;
},
set activeHandler(value)
{
this._activeHandler = value;
this._setting.set(value);
},
dispatch: function(data)
{
return this.dispatchToHandler(this._activeHandler, data);
},
dispatchToHandler: function(name, data)
{
var handler = this._handlers[name];
var result = handler && handler(data);
return !!result;
},
registerHandler: function(name, handler)
{
this._handlers[name] = handler;
this.dispatchEventToListeners(WebInspector.HandlerRegistry.EventTypes.HandlersUpdated);
},
unregisterHandler: function(name)
{
delete this._handlers[name];
this.dispatchEventToListeners(WebInspector.HandlerRegistry.EventTypes.HandlersUpdated);
}
}
WebInspector.HandlerRegistry.EventTypes = {
HandlersUpdated: "HandlersUpdated"
}
WebInspector.HandlerRegistry.prototype.__proto__ = WebInspector.Object.prototype;
WebInspector.HandlerSelector = function(handlerRegistry)
{
this._handlerRegistry = handlerRegistry;
this.element = document.createElement("select");
this.element.addEventListener("change", this._onChange.bind(this), false);
this._update();
this._handlerRegistry.addEventListener(WebInspector.HandlerRegistry.EventTypes.HandlersUpdated, this._update.bind(this));
}
WebInspector.HandlerSelector.prototype =
{
_update: function()
{
this.element.removeChildren();
var names = this._handlerRegistry.handlerNames;
var activeHandler = this._handlerRegistry.activeHandler;
for (var i = 0; i < names.length; ++i) {
var option = document.createElement("option");
option.textContent = names[i];
option.selected = activeHandler === names[i];
this.element.appendChild(option);
}
this.element.disabled = names.length <= 1;
},
_onChange: function(event)
{
var value = event.target.value;
this._handlerRegistry.activeHandler = value;
}
}