Refactored the set property value code out of the PythonComponentWalker class.

git-svn-id: svn://svn.sharpdevelop.net/sharpdevelop/branches/3.0@4548 1ccf3a8d-04fe-1044-b7c0-cef0b8235c61

src/AddIns/BackendBindings/Python/PythonBinding/Project/Src/PythonComponentWalker.cs

@@ -124,7 +124,7 @@ namespace ICSharpCode.PythonBinding
 				return false;
 			}
 			
-			SetPropertyValue(fieldExpression, node.Value);
+			fieldExpression.SetPropertyValue(componentCreator, node.Value);
 			return false;
 		}
 		
@@ -148,7 +148,7 @@ namespace ICSharpCode.PythonBinding
 				return false;
 			}
 			
-			SetPropertyValue(fieldExpression, node.Name.ToString());
+			fieldExpression.SetPropertyValue(componentCreator, node.Name.ToString());
 			return false;
 		}
 		
@@ -170,10 +170,7 @@ namespace ICSharpCode.PythonBinding
 			MemberExpression eventHandlerExpression = node.Right as MemberExpression;
 			string eventHandlerName = eventHandlerExpression.Name.ToString();
 			
-			IComponent currentComponent = this.component;
-			if (field.VariableName.Length > 0) {
-				currentComponent = GetComponent(field.VariableName);
-			}
+			IComponent currentComponent = fieldExpression.GetObject(componentCreator) as IComponent;
 			
 			EventDescriptor eventDescriptor = TypeDescriptor.GetEvents(currentComponent).Find(eventName, false);
 			PropertyDescriptor propertyDescriptor = componentCreator.GetEventProperty(eventDescriptor);
@@ -187,7 +184,7 @@ namespace ICSharpCode.PythonBinding
 		void WalkAssignment(BinaryExpression binaryExpression)
 		{
 			object value = deserializer.Deserialize(binaryExpression);
-			SetPropertyValue(fieldExpression.MemberName, value);
+			fieldExpression.SetPropertyValue(componentCreator, value);
 		}
 
 		/// <summary>
@@ -198,7 +195,7 @@ namespace ICSharpCode.PythonBinding
 			MemberExpression rhsMemberExpression = rhs as MemberExpression;
 			if (rhsMemberExpression != null) {
 				object propertyValue = GetPropertyValueFromAssignmentRhs(rhsMemberExpression);
-				SetPropertyValue(fieldExpression, propertyValue);
+				fieldExpression.SetPropertyValue(componentCreator, propertyValue);
 			} else {
 				walkingAssignment = true;
 				BinaryExpression binaryExpression = rhs as BinaryExpression;
@@ -217,73 +214,6 @@ namespace ICSharpCode.PythonBinding
 			return name == "initializecomponent" || name == "initializecomponents";
 		}
 
-		/// <summary>
-		/// Checks the field expression to see if it references an class instance variable (e.g. self._treeView1) 
-		/// or a variable that is local to the InitializeComponent method (e.g. treeNode1.BackColor)
-		/// </summary>
-		bool SetPropertyValue(PythonControlFieldExpression fieldExpression, object propertyValue)
-		{
-			if (fieldExpression.IsSelfReference) {
-				return SetPropertyValue(fieldExpression.GetObject(GetCurrentComponent()), fieldExpression.MemberName, propertyValue);
-			} 
-			return SetPropertyValue(componentCreator.GetInstance(fieldExpression.VariableName), fieldExpression.MemberName, propertyValue);
-		}
-		
-		/// <summary>
-		/// Sets the value of a property on the current control.
-		/// </summary>
-		bool SetPropertyValue(string name, object propertyValue)
-		{
-			return SetPropertyValue(GetCurrentComponent(), name, propertyValue);
-		}
-		
-		/// <summary>
-		/// Returns true if the current component has a property with the specified name.
-		/// </summary>
-		bool HasPropertyValue(string name)
-		{
-			return GetPropertyDescriptor(GetCurrentComponent(), name) != null;
-		}
-		
-		PropertyDescriptor GetPropertyDescriptor(object component, string name)
-		{
-			return TypeDescriptor.GetProperties(component).Find(name, true);
-		}
-		
-		/// <summary>
-		/// Sets the value of a property on the component.
-		/// </summary>
-		bool SetPropertyValue(object component, string name, object propertyValue)
-		{
-			PropertyDescriptor property = GetPropertyDescriptor(component, name);
-			if (property != null) {
-				propertyValue = ConvertPropertyValue(property, propertyValue);
-				property.SetValue(component, propertyValue);
-				return true;
-			}
-			return false;
-		}
-
-		/// <summary>
-		/// Converts the value to the property's type if required.
-		/// </summary>
-		static object ConvertPropertyValue(PropertyDescriptor propertyDescriptor, object propertyValue)
-		{
-			if (!propertyDescriptor.PropertyType.IsAssignableFrom(propertyValue.GetType())) {
-				return propertyDescriptor.Converter.ConvertFrom(propertyValue);
-			}
-			return propertyValue;
-		}
-				
-		/// <summary>
-		/// Looks for the component with the specified name in the objects that have been
-		/// created whilst processing the InitializeComponent method.
-		/// </summary>
-		IComponent GetComponent(string name)
-		{
-			return componentCreator.GetComponent(name);
-		}
-
 		/// <summary>
 		/// Adds a component to the list of created objects.
 		/// </summary>
@@ -295,14 +225,6 @@ namespace ICSharpCode.PythonBinding
 				componentCreator.Add(component, variableName);
 			}
 		}
-				
-		/// <summary>
-		/// Gets the current control being walked.
-		/// </summary>
-		object GetCurrentComponent()
-		{
-			return fieldExpression.GetObject(componentCreator);
-		}
 		
 		/// <summary>
 		/// Gets the type for the control being walked.
@@ -335,18 +257,18 @@ namespace ICSharpCode.PythonBinding
 		{
 			MemberExpression memberExpression = node.Target as MemberExpression;
 			if (memberExpression != null) {
-				string name = GetInstanceName(fieldExpression);
+				string name = fieldExpression.GetInstanceName(componentCreator);
 				object instance = CreateInstance(name, node);
 				if (instance != null) {
-					if (!SetPropertyValue(fieldExpression, instance)) {
+					if (!fieldExpression.SetPropertyValue(componentCreator, instance)) {
 						AddComponent(fieldExpression.MemberName, instance);
 					}
 				} else {
 					object obj = deserializer.Deserialize(node);
 					if (obj != null) {
-						SetPropertyValue(fieldExpression, obj);
+						fieldExpression.SetPropertyValue(componentCreator, obj);
 					} else if (IsResource(memberExpression)) {
-						SetPropertyValue(fieldExpression.MemberName, GetResource(node));
+						fieldExpression.SetPropertyValue(componentCreator, GetResource(node));
 					} else {
 						throw new PythonComponentWalkerException(String.Format("Could not find type '{0}'.", PythonControlFieldExpression.GetMemberName(memberExpression)));
 					}
@@ -354,20 +276,6 @@ namespace ICSharpCode.PythonBinding
 			}
 		}
 		
-		/// <summary>
-		/// Gets the name of the instance. If the name matches a property of the current component being created
-		/// then this method returns null.
-		/// </summary>
-		string GetInstanceName(PythonControlFieldExpression fieldExpression)
-		{
-			if (fieldExpression.IsSelfReference) {
-				if (!HasPropertyValue(fieldExpression.MemberName)) {
-					return PythonControlFieldExpression.GetVariableName(fieldExpression.MemberName);
-				}
-			}
-			return null;
-		}
-		
 		/// <summary>
 		/// Walks a method call. Typical method calls are:
 		/// 

src/AddIns/BackendBindings/Python/PythonBinding/Project/Src/PythonControlFieldExpression.cs

@@ -176,7 +176,33 @@ namespace ICSharpCode.PythonBinding
 			}
 			return names.ToArray();
 		}
-
+		
+		/// <summary>
+		/// Returns true if the variable has a property with the specified name.
+		/// </summary>
+		public bool HasPropertyValue(IComponentCreator componentCreator, string name)
+		{
+			object component = GetObject(componentCreator);
+			if (component != null) {
+				return TypeDescriptor.GetProperties(component).Find(name, true) != null;
+			}
+			return false;
+		}
+		
+		/// <summary>
+		/// Gets the name of the instance. If the name matches a property of the current component being created
+		/// then this method returns null.
+		/// </summary>
+		public string GetInstanceName(IComponentCreator componentCreator)
+		{
+			if (IsSelfReference) {
+				if (!HasPropertyValue(componentCreator, memberName)) {
+					return variableName;
+				}
+			}
+			return null;
+		}
+		
 		/// <summary>
 		/// Gets the object that the field expression variable refers to.
 		/// </summary>
@@ -195,7 +221,7 @@ namespace ICSharpCode.PythonBinding
 		/// <remarks>The object parameter must be equivalent to the object referred to
 		/// by the variable name in this PythonControlFieldExpression 
 		/// (e.g. button1 in self._button1.FlatAppearance.BorderSize).</remarks>
-		public object GetObject(object component)
+		public object GetObjectForMemberName(object component)
 		{
 			string[] members = fullMemberName.Split('.');
 			int startIndex = GetMembersStartIndex(members);
@@ -209,8 +235,27 @@ namespace ICSharpCode.PythonBinding
 				currentComponent = propertyDescriptor.GetValue(currentComponent);
 			}
 			return currentComponent;
-		}		
+		}
 		
+		/// <summary>
+		/// Sets the property value that is referenced by this field expression.
+		/// </summary>
+		/// <remarks>
+		/// Checks the field expression to see if it references an class instance variable (e.g. self._treeView1) 
+		/// or a variable that is local to the InitializeComponent method (e.g. treeNode1.BackColor)
+		/// </remarks>
+		public bool SetPropertyValue(IComponentCreator componentCreator, object propertyValue)
+		{
+			object component = null;
+			if (IsSelfReference) {
+				component = GetObject(componentCreator);
+				component = GetObjectForMemberName(component);
+			} else {
+				component = componentCreator.GetInstance(variableName);
+			}
+			return SetPropertyValue(component, memberName, propertyValue);
+		}
+						
 		/// <summary>
 		/// Gets the member object that matches the field member.
 		/// 
@@ -340,5 +385,30 @@ namespace ICSharpCode.PythonBinding
 			}
 			return 1;
 		}
+		
+		/// <summary>
+		/// Sets the value of a property on the component.
+		/// </summary>
+		static bool SetPropertyValue(object component, string name, object propertyValue)
+		{
+			PropertyDescriptor property = TypeDescriptor.GetProperties(component).Find(name, true);
+			if (property != null) {
+				propertyValue = ConvertPropertyValue(property, propertyValue);
+				property.SetValue(component, propertyValue);
+				return true;
+			}
+			return false;
+		}
+
+		/// <summary>
+		/// Converts the value to the property's type if required.
+		/// </summary>
+		static object ConvertPropertyValue(PropertyDescriptor propertyDescriptor, object propertyValue)
+		{
+			if (!propertyDescriptor.PropertyType.IsAssignableFrom(propertyValue.GetType())) {
+				return propertyDescriptor.Converter.ConvertFrom(propertyValue);
+			}
+			return propertyValue;
+		}		
 	}
 }

src/AddIns/BackendBindings/Python/PythonBinding/Test/Designer/PythonControlFieldExpressionTests.cs

@@ -212,7 +212,7 @@ namespace PythonBinding.Tests.Designer
 				AssignmentStatement statement = PythonParserHelper.GetAssignmentStatement("self._button1.Size = System.Drawing.Size(10, 10)");
 				PythonControlFieldExpression field = PythonControlFieldExpression.Create(statement.Left[0] as MemberExpression);
 								
-				Assert.AreEqual(button, field.GetObject(button));
+				Assert.AreEqual(button, field.GetObjectForMemberName(button));
 			}
 		}
 
@@ -223,7 +223,7 @@ namespace PythonBinding.Tests.Designer
 				AssignmentStatement statement = PythonParserHelper.GetAssignmentStatement("_button1.Size = System.Drawing.Size(10, 10)");
 				PythonControlFieldExpression field = PythonControlFieldExpression.Create(statement.Left[0] as MemberExpression);
 								
-				Assert.AreEqual(button, field.GetObject(button));
+				Assert.AreEqual(button, field.GetObjectForMemberName(button));
 			}
 		}
 		
@@ -234,7 +234,7 @@ namespace PythonBinding.Tests.Designer
 				AssignmentStatement statement = PythonParserHelper.GetAssignmentStatement("self._button1.FlatAppearance.BorderSize = 3");
 				PythonControlFieldExpression field = PythonControlFieldExpression.Create(statement.Left[0] as MemberExpression);
 								
-				Assert.AreEqual(button.FlatAppearance, field.GetObject(button));
+				Assert.AreEqual(button.FlatAppearance, field.GetObjectForMemberName(button));
 			}
 		}
 		
@@ -245,7 +245,7 @@ namespace PythonBinding.Tests.Designer
 				AssignmentStatement statement = PythonParserHelper.GetAssignmentStatement("_button1.FlatAppearance.BorderSize = 3");
 				PythonControlFieldExpression field = PythonControlFieldExpression.Create(statement.Left[0] as MemberExpression);
 								
-				Assert.AreEqual(button.FlatAppearance, field.GetObject(button));
+				Assert.AreEqual(button.FlatAppearance, field.GetObjectForMemberName(button));
 			}
 		}
 		
@@ -256,7 +256,7 @@ namespace PythonBinding.Tests.Designer
 				AssignmentStatement statement = PythonParserHelper.GetAssignmentStatement("self._button1.InvalidProperty.BorderSize = 3");
 				PythonControlFieldExpression field = PythonControlFieldExpression.Create(statement.Left[0] as MemberExpression);
 								
-				Assert.IsNull(field.GetObject(button));
+				Assert.IsNull(field.GetObjectForMemberName(button));
 			}
 		}