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87 lines
2.0 KiB
JavaScript
87 lines
2.0 KiB
JavaScript
// Handlers
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// --------
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// A registry of functions to call, given a name
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Wreqr.Handlers = (function(Backbone, _){
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"use strict";
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// Constructor
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// -----------
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var Handlers = function(options){
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this.options = options;
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this._wreqrHandlers = {};
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if (_.isFunction(this.initialize)){
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this.initialize(options);
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}
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};
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Handlers.extend = Backbone.Model.extend;
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// Instance Members
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// ----------------
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_.extend(Handlers.prototype, Backbone.Events, {
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// Add multiple handlers using an object literal configuration
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setHandlers: function(handlers){
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_.each(handlers, function(handler, name){
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var context = null;
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if (_.isObject(handler) && !_.isFunction(handler)){
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context = handler.context;
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handler = handler.callback;
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}
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this.setHandler(name, handler, context);
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}, this);
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},
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// Add a handler for the given name, with an
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// optional context to run the handler within
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setHandler: function(name, handler, context){
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var config = {
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callback: handler,
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context: context
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};
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this._wreqrHandlers[name] = config;
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this.trigger("handler:add", name, handler, context);
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},
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// Determine whether or not a handler is registered
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hasHandler: function(name){
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return !! this._wreqrHandlers[name];
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},
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// Get the currently registered handler for
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// the specified name. Throws an exception if
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// no handler is found.
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getHandler: function(name){
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var config = this._wreqrHandlers[name];
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if (!config){
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return;
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}
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return function(){
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return config.callback.apply(config.context, arguments);
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};
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},
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// Remove a handler for the specified name
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removeHandler: function(name){
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delete this._wreqrHandlers[name];
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},
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// Remove all handlers from this registry
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removeAllHandlers: function(){
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this._wreqrHandlers = {};
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}
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});
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return Handlers;
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})(Backbone, _);
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