Fixed SD2-459: Project scout viewstate not remembered.

git-svn-id: svn://svn.sharpdevelop.net/sharpdevelop/trunk@951 1ccf3a8d-04fe-1044-b7c0-cef0b8235c61

src/Main/Base/Project/Src/Gui/Pads/ProjectBrowser/ProjectBrowserPad.cs

@@ -54,10 +54,11 @@ namespace ICSharpCode.SharpDevelop.Project
 			instance = this;
 			ProjectService.SolutionLoaded += ProjectServiceSolutionLoaded;
 			ProjectService.SolutionClosed += ProjectServiceSolutionClosed;
+			ProjectService.SolutionPreferencesSaving += ProjectServiceSolutionPreferencesSaving;
 			
 			WorkbenchSingleton.Workbench.ActiveWorkbenchWindowChanged += ActiveWindowChanged;
 			if (ProjectService.OpenSolution != null) {
-				projectBrowserPanel.ViewSolution(ProjectService.OpenSolution);
+				ProjectServiceSolutionLoaded(null, new SolutionEventArgs(ProjectService.OpenSolution));
 			}
 		}
 		
@@ -66,9 +67,15 @@ namespace ICSharpCode.SharpDevelop.Project
 			ProjectBrowserControl.TreeView.StartLabelEdit(node);
 		}
 		
+		void ProjectServiceSolutionPreferencesSaving(object sender, SolutionEventArgs e)
+		{
+			projectBrowserPanel.StoreViewState(e.Solution.Preferences.Properties);
+		}
+		
 		void ProjectServiceSolutionLoaded(object sender, SolutionEventArgs e)
 		{
 			projectBrowserPanel.ViewSolution(e.Solution);
+			projectBrowserPanel.ReadViewState(e.Solution.Preferences.Properties);
 		}
 		
 		void ProjectServiceSolutionClosed(object sender, EventArgs e)
@@ -180,6 +187,5 @@ namespace ICSharpCode.SharpDevelop.Project
 			}
 		}
 		#endregion
-		
 	}
 }

src/Main/Base/Project/Src/Gui/Pads/ProjectBrowser/ProjectBrowserPanel.cs

@@ -8,6 +8,7 @@
 using System;
 using System.ComponentModel;
 using System.Drawing;
+using System.Text;
 using System.Windows.Forms;
 using ICSharpCode.Core;
 
@@ -51,7 +52,7 @@ namespace ICSharpCode.SharpDevelop.Project
 			projectBrowserControl.TreeView.BeforeSelect += TreeViewBeforeSelect;
 		}
 		
-		void TreeViewBeforeSelect(object sender, TreeViewCancelEventArgs e) 
+		void TreeViewBeforeSelect(object sender, TreeViewCancelEventArgs e)
 		{
 			AbstractProjectBrowserTreeNode node = e.Node as AbstractProjectBrowserTreeNode;
 			if (node == null) {
@@ -71,6 +72,86 @@ namespace ICSharpCode.SharpDevelop.Project
 			projectBrowserControl.ViewSolution(solution);
 		}
 		
+		/// <summary>
+		/// Writes the current view state into the memento.
+		/// </summary>
+		public void StoreViewState(Properties memento)
+		{
+			memento.Set("ProjectBrowserState", GetViewStateString(projectBrowserControl.TreeView));
+		}
+		
+		/// <summary>
+		/// Reads the view state from the memento.
+		/// </summary>
+		public void ReadViewState(Properties memento)
+		{
+			ApplyViewStateString(memento.Get("ProjectBrowserState", ""), projectBrowserControl.TreeView);
+		}
+		
+		// example ViewStateString:
+		// [Main[ICSharpCode.SharpDevelop[Src[Gui[Pads[ProjectBrowser[]]]]Services[]]]]
+		// -> every node name is terminated by opening bracket
+		// -> only expanded nodes are included in the view state string
+		// -> after an opening bracket, an identifier or closing bracket must follow
+		// -> after a closing bracket, an identifier or closing bracket must follow
+		// -> nodes whose text contains '[' can not be saved
+		public static string GetViewStateString(TreeView treeView)
+		{
+			StringBuilder b = new StringBuilder();
+			WriteViewStateString(b, treeView.Nodes[0]);
+			return b.ToString();
+		}
+		static void WriteViewStateString(StringBuilder b, TreeNode node)
+		{
+			b.Append('[');
+			foreach (TreeNode subNode in node.Nodes) {
+				if (subNode.IsExpanded && subNode.Text.IndexOf('[') < 0) {
+					b.Append(subNode.Text);
+					WriteViewStateString(b, subNode);
+				}
+			}
+			b.Append(']');
+		}
+		public static void ApplyViewStateString(string viewState, TreeView treeView)
+		{
+			if (viewState.Length == 0)
+				return;
+			int i = 0;
+			ApplyViewStateString(treeView.Nodes[0], viewState, ref i);
+			System.Diagnostics.Debug.Assert(i == viewState.Length - 1);
+		}
+		static void ApplyViewStateString(TreeNode node, string viewState, ref int pos)
+		{
+			if (viewState[pos++] != '[')
+				throw new ArgumentException("pos must point to '['");
+			// expect an identifier or an closing bracket
+			while (viewState[pos] != ']') {
+				StringBuilder nameBuilder = new StringBuilder();
+				char ch;
+				while ((ch = viewState[pos++]) != '[') {
+					nameBuilder.Append(ch);
+				}
+				pos -= 1; // go back to '[' character
+				string nodeText = nameBuilder.ToString();
+				// find the node in question
+				TreeNode subNode = null;
+				if (node != null) {
+					foreach (TreeNode n in node.Nodes) {
+						if (n.Text == nodeText) {
+							subNode = n;
+							break;
+						}
+					}
+				}
+				if (subNode != null) {
+					subNode.Expand();
+				}
+				ApplyViewStateString(subNode, viewState, ref pos);
+				// pos now points to the closing bracket of the inner view state
+				pos += 1; // move to next character
+			}
+		}
+		
 		public void Clear()
 		{
 			projectBrowserControl.Clear();

src/Main/Base/Project/Src/Project/Solution/SolutionPreferences.cs

@@ -14,6 +14,7 @@ namespace ICSharpCode.SharpDevelop.Project
 	public class SolutionPreferences : IMementoCapable
 	{
 		Solution solution;
+		Properties properties = new Properties();
 		string startupProject = "";
 		string activeConfiguration = "Debug";
 		string activePlatform = "Any CPU";
@@ -23,6 +24,12 @@ namespace ICSharpCode.SharpDevelop.Project
 			this.solution = solution;
 		}
 		
+		public Properties Properties {
+			get {
+				return properties;
+			}
+		}
+		
 		public IProject StartupProject {
 			get {
 				if (startupProject.Length == 0)
@@ -61,9 +68,9 @@ namespace ICSharpCode.SharpDevelop.Project
 		/// <summary>
 		/// Creates a new memento from the state.
 		/// </summary>
-		public Properties CreateMemento()
+		Properties IMementoCapable.CreateMemento()
 		{
-			Properties p = new Properties();
+			Properties p = properties;
 			p.Set("StartupProject",      startupProject);
 			p.Set("ActiveConfiguration", activeConfiguration);
 			p.Set("ActivePlatform",      activePlatform);
@@ -73,7 +80,7 @@ namespace ICSharpCode.SharpDevelop.Project
 		/// <summary>
 		/// Sets the state to the given memento.
 		/// </summary>
-		public void SetMemento(Properties memento)
+		void IMementoCapable.SetMemento(Properties memento)
 		{
 			startupProject       = memento.Get("StartupProject", "");
 			string configuration = memento.Get("ActiveConfiguration", activeConfiguration);
@@ -89,6 +96,8 @@ namespace ICSharpCode.SharpDevelop.Project
 			
 			this.ActiveConfiguration = configuration;
 			this.ActivePlatform = platform;
+
+			this.properties = memento;
 		}
 	}
 }

src/Main/Base/Project/Src/Services/ProjectService/ProjectService.cs

@@ -18,6 +18,7 @@ namespace ICSharpCode.SharpDevelop.Project
 		static IProject currentProject;
 		
 		public static Solution OpenSolution {
+			[System.Diagnostics.DebuggerStepThrough]
 			get {
 				return openSolution;
 			}
@@ -218,16 +219,18 @@ namespace ICSharpCode.SharpDevelop.Project
 			openSolution = Solution.Load(fileName);
 			if (openSolution == null)
 				return;
-			OnSolutionLoaded(new SolutionEventArgs(openSolution));
 			try {
 				string file = GetPreferenceFileName(openSolution.FileName);
 				if (FileUtility.IsValidFileName(file) && File.Exists(file)) {
-					openSolution.Preferences.SetMemento(Properties.Load(file));
+					(openSolution.Preferences as IMementoCapable).SetMemento(Properties.Load(file));
 				}
 				ApplyConfigurationAndReadPreferences();
 			} catch (Exception ex) {
 				MessageService.ShowError(ex);
 			}
+			// preferences must be read before OnSolutionLoad is called to enable
+			// the event listeners to read e.Solution.Preferences.Properties
+			OnSolutionLoaded(new SolutionEventArgs(openSolution));
 		}
 		
 		static void ApplyConfigurationAndReadPreferences()
@@ -275,8 +278,10 @@ namespace ICSharpCode.SharpDevelop.Project
 			solution.Save(solutionFile);
 			
 			openSolution = solution;
-			OnSolutionLoaded(new SolutionEventArgs(openSolution));
 			ApplyConfigurationAndReadPreferences();
+			// preferences must be read before OnSolutionLoad is called to enable
+			// the event listeners to read e.Solution.Preferences.Properties
+			OnSolutionLoaded(new SolutionEventArgs(openSolution));
 		}
 		
 		public static void SaveSolution()
@@ -307,14 +312,13 @@ namespace ICSharpCode.SharpDevelop.Project
 				Directory.CreateDirectory(directory);
 			}
 			
-			string fullFileName;
-			Properties memento = openSolution.Preferences.CreateMemento();
-			if (memento != null) {
-				fullFileName = GetPreferenceFileName(openSolution.FileName);
-				
-				if (FileUtility.IsValidFileName(fullFileName)) {
-					FileUtility.ObservedSave(new NamedFileOperationDelegate(memento.Save), fullFileName, FileErrorPolicy.Inform);
-				}
+			if (SolutionPreferencesSaving != null)
+				SolutionPreferencesSaving(null, new SolutionEventArgs(openSolution));
+			Properties memento = (openSolution.Preferences as IMementoCapable).CreateMemento();
+			
+			string fullFileName = GetPreferenceFileName(openSolution.FileName);
+			if (FileUtility.IsValidFileName(fullFileName)) {
+				FileUtility.ObservedSave(new NamedFileOperationDelegate(memento.Save), fullFileName, FileErrorPolicy.Inform);
 			}
 			
 			foreach (IProject project in OpenSolution.Projects) {
@@ -474,6 +478,12 @@ namespace ICSharpCode.SharpDevelop.Project
 		public static event EventHandler<SolutionEventArgs> SolutionClosing;
 		public static event EventHandler                    SolutionClosed;
 		
+		/// <summary>
+		/// Raised before the solution preferences are being saved. Allows you to save
+		/// your additional properties in the solution preferences.
+		/// </summary>
+		public static event EventHandler<SolutionEventArgs> SolutionPreferencesSaving;
+		
 		public static event ProjectEventHandler CurrentProjectChanged;
 		
 		public static event EventHandler<ProjectItemEventArgs> ProjectItemAdded;