add an isObjectEmpty method to Ext to test to see if an object == {}

fix a couple of bugs in the options manager
only call core.set_config if there are changed options
call all the pages onApply method if they have one

deluge/ui/web/js/Deluge.OptionsManager.js

@@ -101,12 +101,17 @@ Deluge.OptionsManager = Ext.extend(Ext.util.Observable, {
 	 * @returns {Object} the options value.
 	 */
 	get: function() {
+		if (arguments.length == 1) {
+			var option = arguments[0];
+			return (this.isDirty(option)) ? this.changed[option] : this.options[option];
+		} else {
 		var options = {};
 		Ext.each(arguments, function(option) {
 			if (!this.has(option)) return;
 			options[option] = (this.isDirty(option)) ? this.changed[option] : this.options[option];
 		}, this);
 		return options;
+		}
 	},
 	
 	/**
@@ -190,16 +195,7 @@ Deluge.OptionsManager = Ext.extend(Ext.util.Observable, {
 				this.update(key, option[key]);
 			}
 		} else {
-			var oldValue = this.get(option);
-			if (oldValue == value) return;
-			
 			var defaultValue = this.getDefault(option);
-			if (defaultValue == value) {
-				if (this.isDirty(option)) delete this.changed[option];
-				this.fireEvent('changed', option, value, oldValue);
-				return;
-			}
-			
 			if (Ext.type(defaultValue) != Ext.type(value)) {
 				switch (Ext.type(defaultValue)) {
 					case 'string':
@@ -214,6 +210,15 @@ Deluge.OptionsManager = Ext.extend(Ext.util.Observable, {
 				}
 			}			
 			
+			var oldValue = this.get(option);
+			if (oldValue == value) return;
+			
+			if (defaultValue == value) {
+				if (this.isDirty(option)) delete this.changed[option];
+				this.fireEvent('changed', option, value, oldValue);
+				return;
+			}
+
 			this.changed[option] = value;
 			this.fireEvent('changed', option, value, oldValue);
 		}

deluge/ui/web/js/Deluge.Preferences.js

@@ -97,10 +97,16 @@ Ext.deluge.PreferencesWindow = Ext.extend(Ext.Window, {
 	
 	onApply: function(e) {
 		var changed = this.optionsManager.getDirty();
+		if (!Ext.isObjectEmpty(changed)) {
 			Deluge.Client.core.set_config(changed, {
 				success: this.onSetConfig,
 				scope: this
 			});
+		}
+		
+		for (var page in this.pages) {
+			if (this.pages[page].onApply) this.pages[page].onApply();
+		}
 	},
 	
 	onClose: function() {

deluge/ui/web/js/Deluge.js

@@ -45,6 +45,11 @@ Ext.namespace('Ext.deluge');
 	});
 	
 	Ext.apply(Ext, {
+		isObjectEmpty: function(obj) {
+			for(var i in obj) { return false; }
+			return true;
+		},
+		
 		keys: function(obj) {
 			var keys = [];
 			for (i in obj) if (obj.hasOwnProperty(i))