ResourceCodeGeneratorTool: Ensure that we do not overwrite an existing class (e.g. designed form) with the generated class. Output an error message when such a situation occurs.

Image resource editor: Fix a situation where the OK button could have become disabled incorrectly.

git-svn-id: svn://svn.sharpdevelop.net/sharpdevelop/branches/3.0@3669 1ccf3a8d-04fe-1044-b7c0-cef0b8235c61

src/AddIns/DisplayBindings/FormsDesigner/Project/Src/Gui/ImageResourceEditorDialog.cs

@@ -480,7 +480,9 @@ namespace ICSharpCode.FormsDesigner.Gui
 		
 		void ProjectResourcesTreeViewAfterSelect(object sender, TreeViewEventArgs e)
 		{
-			this.UpdateOnProjectResourceSelection();
+			if (this.projectResourceRadioButton.Checked) {
+				this.UpdateOnProjectResourceSelection();
+			}
 		}
 		
 		void UpdateOnProjectResourceSelection()

src/AddIns/DisplayBindings/ResourceEditor/Project/Src/ResourceCodeGeneratorTool.cs

@@ -7,11 +7,15 @@
 
 using System;
 using System.Collections;
-using ICSharpCode.SharpDevelop.Project;
 using System.Resources;
 using System.Resources.Tools;
 using System.IO;
 
+using ICSharpCode.Core;
+using ICSharpCode.SharpDevelop;
+using ICSharpCode.SharpDevelop.Dom;
+using ICSharpCode.SharpDevelop.Project;
+
 namespace ResourceEditor
 {
 	public class ResourceCodeGeneratorTool : ICustomTool
@@ -26,6 +30,21 @@ namespace ResourceEditor
 			                             });*/
 			string inputFilePath = item.FileName;
 			
+			// Ensure that the generated code will not conflict with an
+			// existing class.
+			if (context.Project != null) {
+				IProjectContent pc = ParserService.GetProjectContent(context.Project);
+				if (pc != null) {
+					IClass existingClass = pc.GetClass(context.OutputNamespace + "." + StronglyTypedResourceBuilder.VerifyResourceName(Path.GetFileNameWithoutExtension(inputFilePath), pc.Language.CodeDomProvider), 0);
+					if (existingClass != null) {
+						if (!IsGeneratedResourceClass(existingClass)) {
+							context.MessageView.AppendLine(String.Format(System.Globalization.CultureInfo.CurrentCulture, ResourceService.GetString("ResourceEditor.ResourceCodeGeneratorTool.ClassConflict"), inputFilePath, existingClass.FullyQualifiedName));
+							return;
+						}
+					}
+				}
+			}
+			
 			IResourceReader reader;
 			if (string.Equals(Path.GetExtension(inputFilePath), ".resx", StringComparison.OrdinalIgnoreCase)) {
 				reader = new ResXResourceReader(inputFilePath);
@@ -53,6 +72,33 @@ namespace ResourceEditor
 					createInternalClass,             // internal class
 					out unmatchable
 				));
+			
+			foreach (string s in unmatchable) {
+				context.MessageView.AppendLine(String.Format(System.Globalization.CultureInfo.CurrentCulture, ResourceService.GetString("ResourceEditor.ResourceCodeGeneratorTool.CouldNotGenerateResourceProperty"), s));
+			}
+		}
+		
+		/// <summary>
+		/// Determines whether the specified class is a generated resource
+		/// class, based on the attached attributes.
+		/// </summary>
+		static bool IsGeneratedResourceClass(IClass @class)
+		{
+			IClass generatedCodeAttributeClass = @class.ProjectContent.GetClass("System.CodeDom.Compiler.GeneratedCodeAttribute", 0);
+			if (generatedCodeAttributeClass == null) {
+				LoggingService.Info("Could not find the class for 'System.CodeDom.Compiler.GeneratedCodeAttribute'.");
+				return false;
+			}
+			IReturnType generatedCodeAttribute = generatedCodeAttributeClass.DefaultReturnType;
+			
+			foreach (IAttribute att in @class.Attributes) {
+				if (att.AttributeType.Equals(generatedCodeAttribute) &&
+				    att.PositionalArguments.Count == 2 &&
+				    String.Equals("System.Resources.Tools.StronglyTypedResourceBuilder", att.PositionalArguments[0] as string, StringComparison.Ordinal)) {
+					return true;
+				}
+			}
+			return false;
 		}
 	}