create a plugin registration system to allow for plugin loading on the fly

remove the plugin event handlers from the event manager
fix enabling/disabling plugins when the preferences page hasn't been rendered yet

deluge/ui/web/js/deluge-all/Deluge.js

@@ -87,6 +87,9 @@ Ext.USE_NATIVE_JSON = true;
 
 // Create the Deluge namespace
 Ext.apply(Deluge, {
+
+	// private
+	pluginStore: {},
 	
 	// private
 	progressTpl:	'<div class="x-progress-wrap x-progress-renderered">' +
@@ -117,6 +120,31 @@ Ext.apply(Deluge, {
 		var barWidth = progressWidth - 1;
 		var textWidth = ((progressWidth - modifier) > 0 ? progressWidth - modifier : 0);
 		return String.format(Deluge.progressTpl, text, width, barWidth, textWidth);
+	},
+
+	/**
+	 * Constructs a new instance of the specified plugin.
+	 * @param {String} name The plugin name to create
+	 */
+	createPlugin: function(name) {
+		return new Deluge.pluginStore[name]();
+	},
+
+	/**
+	 * Check to see if a plugin has been registered.
+	 * @param {String} name The plugin name to check
+	 */
+	hasPlugin: function(name) {
+		return (Deluge.pluginStore[name]) ? true : false;
+	},
+
+	/**
+	 * Register a plugin with the Deluge interface.
+	 * @param {String} name The plugin name to register
+	 * @param {Plugin} plugin The plugin to register
+	 */
+	registerPlugin: function(name, plugin) {
+		Deluge.pluginStore[name] = plugin;
 	}
 	
 });

deluge/ui/web/js/deluge-all/EventsManager.js

@@ -88,8 +88,6 @@ Deluge.EventsManager = Ext.extend(Ext.util.Observable, {
 	// private
 	onLogin: function() {
 		this.start();
-		this.on('PluginEnabledEvent', this.onPluginEnabled, this);
-		this.on('PluginDisabledEvent', this.onPluginDisabled, this);
 	},
 
 	onGetEventsSuccess: function(events) {

deluge/ui/web/js/deluge-all/UI.js

@@ -81,8 +81,9 @@ deluge.ui = {
 			url: deluge.config.base + 'json'
 		});
 	
-		for (var plugin in Deluge.plugins) {
-			plugin = new Deluge.plugins[plugin]();
+		// enable all the already active plugins
+		for (var plugin in Deluge.pluginStore) {
+			plugin = Deluge.createPlugin(plugin);
 			plugin.enable();
 			deluge.plugins[plugin.name] = plugin;
 		}
@@ -161,14 +162,19 @@ deluge.ui = {
 	},
 
 	onPluginEnabled: function(pluginName) {
-		deluge.client.web.get_plugin_resources(pluginName, {
-			success: this.onGotPluginResources,
-			scope: this
-		})
+		alert('enabled ' + pluginName);
+		if (deluge.plugins[pluginName]) {
+			deluge.plugins[pluginName].enable();
+		} else {
+			deluge.client.web.get_plugin_resources(pluginName, {
+				success: this.onGotPluginResources,
+				scope: this
+			});
+		}
 	},
 
 	onGotPluginResources: function(resources) {
-		var scripts = (deluge.debug) ? resources.debug_scripts : resources.scripts;
+		var scripts = (Deluge.debug) ? resources.debug_scripts : resources.scripts;
 		Ext.each(scripts, function(script) {
 			Ext.ux.JSLoader({
 				url: script,
@@ -179,15 +185,18 @@ deluge.ui = {
 	},
 
 	onPluginDisabled: function(pluginName) {
+		alert('disabled ' + pluginName);
 		deluge.plugins[pluginName].disable();
 	},
 
 	onPluginLoaded: function(options) {
 		// This could happen if the plugin has multiple scripts
-		if (!deluge.plugins[options.pluginName]) return;
+		if (!Deluge.hasPlugin(options.pluginName)) return;
 
 		// Enable the plugin
-		deluge.plugins[options.pluginName].enable();
+		plugin = Deluge.createPlugin(options.pluginName);
+		plugin.enable();
+		deluge.plugins[plugin.name] = plugin;
 	},
 
 	/**

deluge/ui/web/js/deluge-all/preferences/PluginsPage.js

@@ -310,6 +310,7 @@ Deluge.preferences.Plugins = Ext.extend(Ext.Panel, {
 
 	onPluginEnabled: function(pluginName) {
 		var index = this.grid.getStore().find('plugin', pluginName);
+		if (index == -1) return;
 		var plugin = this.grid.getStore().getAt(index);
 		plugin.set('enabled', true);
 		plugin.commit();
@@ -317,6 +318,7 @@ Deluge.preferences.Plugins = Ext.extend(Ext.Panel, {
 	
 	onPluginDisabled: function(pluginName) {
 		var index = this.grid.getStore().find('plugin', pluginName);
+		if (index == -1) return;
 		var plugin = this.grid.getStore().getAt(index);
 		plugin.set('enabled', false);
 		plugin.commit();