Fixed forum-13686: Read-only custom line not so read-only

git-svn-id: svn://svn.sharpdevelop.net/sharpdevelop/trunk@2141 1ccf3a8d-04fe-1044-b7c0-cef0b8235c61

src/Libraries/ICSharpCode.TextEditor/Project/Src/Document/Selection/SelectionManager.cs

@@ -17,10 +17,10 @@ namespace ICSharpCode.TextEditor.Document
 	/// </summary>
 	public class SelectionManager : IDisposable
 	{
-        public Point selectionStart;
+		internal Point selectionStart;
 		IDocument document;
 		TextArea textArea;
-        public SelectFrom selectFrom = new SelectFrom();
+		internal SelectFrom selectFrom = new SelectFrom();
 
 		List<ISelection> selectionCollection = new List<ISelection>();
 		
@@ -42,6 +42,20 @@ namespace ICSharpCode.TextEditor.Document
 			}
 		}
 		
+		public bool SelectionIsReadonly {
+			get {
+				if (document.ReadOnly)
+					return true;
+				if (document.TextEditorProperties.UseCustomLine) {
+					foreach (ISelection sel in selectionCollection) {
+						if (document.CustomLineManager.IsReadOnly(sel, false))
+							return true;
+					}
+				}
+				return false;
+			}
+		}
+		
 		/// <value>
 		/// The text that is currently selected.
 		/// </value>
@@ -371,7 +385,7 @@ namespace ICSharpCode.TextEditor.Document
 		/// <remarks>
 		/// Used internally, do not call.
 		/// </remarks>
-		public void Insert(int offset, string text)
+		internal void Insert(int offset, string text)
 		{
 //			foreach (ISelection selection in SelectionCollection) {
 //				if (selection.Offset > offset) {
@@ -385,7 +399,7 @@ namespace ICSharpCode.TextEditor.Document
 		/// <remarks>
 		/// Used internally, do not call.
 		/// </remarks>
-		public void Remove(int offset, int length)
+		internal void Remove(int offset, int length)
 		{
 //			foreach (ISelection selection in selectionCollection) {
 //				if (selection.Offset > offset) {
@@ -399,7 +413,7 @@ namespace ICSharpCode.TextEditor.Document
 		/// <remarks>
 		/// Used internally, do not call.
 		/// </remarks>
-		public void Replace(int offset, int length, string text)
+		internal void Replace(int offset, int length, string text)
 		{
 //			foreach (ISelection selection in selectionCollection) {
 //				if (selection.Offset > offset) {
@@ -450,7 +464,7 @@ namespace ICSharpCode.TextEditor.Document
 	}
 
 	// selection initiated from...
-    public class SelectFrom {
+	internal class SelectFrom {
 		public int where = WhereFrom.None; // last selection initiator
 		public int first = WhereFrom.None; // first selection initiator
 
@@ -460,7 +474,7 @@ namespace ICSharpCode.TextEditor.Document
 	}
 
 	// selection initiated from type...
-    public class WhereFrom {
+	internal class WhereFrom {
 		public const int None = 0;
 		public const int Gutter = 1;
 		public const int TArea = 2;

src/Libraries/ICSharpCode.TextEditor/Project/Src/Gui/TextArea.cs

@@ -554,7 +554,7 @@ namespace ICSharpCode.TextEditor
 			
 			if (TextEditorProperties.UseCustomLine == true) {
 				if (SelectionManager.HasSomethingSelected) {
-					if (Document.CustomLineManager.IsReadOnly(SelectionManager.SelectionCollection[0], false))
+					if (SelectionManager.SelectionIsReadonly)
 						return;
 				} else if (Document.CustomLineManager.IsReadOnly(Caret.Line, false) == true)
 					return;
@@ -615,7 +615,7 @@ namespace ICSharpCode.TextEditor
 			if (keyData == Keys.Back || keyData == Keys.Delete || keyData == Keys.Enter) {
 				if (TextEditorProperties.UseCustomLine == true) {
 					if (SelectionManager.HasSomethingSelected) {
-						if (Document.CustomLineManager.IsReadOnly(SelectionManager.SelectionCollection[0], false))
+						if (SelectionManager.SelectionIsReadonly)
 							return true;
 					} else {
 						int curLineNr   = Document.GetLineNumberForOffset(Caret.Offset);
@@ -690,7 +690,7 @@ namespace ICSharpCode.TextEditor
 					return false;
 				if (TextEditorProperties.UseCustomLine == true) {
 					if (SelectionManager.HasSomethingSelected == true) {
-						if (Document.CustomLineManager.IsReadOnly(SelectionManager.SelectionCollection[0], false))
+						if (SelectionManager.SelectionIsReadonly)
 							return false;
 					}
 					if (Document.CustomLineManager.IsReadOnly(Caret.Line, false) == true)

src/Libraries/ICSharpCode.TextEditor/Project/Src/Gui/TextAreaClipboardHandler.cs

@@ -111,6 +111,13 @@ namespace ICSharpCode.TextEditor
 		
 		public void Cut(object sender, EventArgs e)
 		{
+			if (textArea.TextEditorProperties.UseCustomLine == true) {
+				if (textArea.SelectionManager.HasSomethingSelected) {
+					if (textArea.SelectionManager.SelectionIsReadonly)
+						return;
+				} else if (textArea.Document.CustomLineManager.IsReadOnly(textArea.Caret.Line, false) == true)
+					return;
+			}
 			if (CopyTextToClipboard(textArea.SelectionManager.SelectedText)) {
 				// Remove text
 				textArea.BeginUpdate();
@@ -147,6 +154,13 @@ namespace ICSharpCode.TextEditor
 		
 		public void Paste(object sender, EventArgs e)
 		{
+			if (textArea.TextEditorProperties.UseCustomLine == true) {
+				if (textArea.SelectionManager.HasSomethingSelected) {
+					if (textArea.SelectionManager.SelectionIsReadonly)
+						return;
+				} else if (textArea.Document.CustomLineManager.IsReadOnly(textArea.Caret.Line, false) == true)
+					return;
+			}
 			// Clipboard.GetDataObject may throw an exception...
 			for (int i = 0;; i++) {
 				try {

src/Libraries/ICSharpCode.TextEditor/Project/Src/Gui/TextAreaDragDropHandler.cs

@@ -68,12 +68,24 @@ namespace ICSharpCode.TextEditor
 				textArea.BeginUpdate();
 				try {
 					int offset = textArea.Caret.Offset;
+					if (textArea.TextEditorProperties.UseCustomLine
+					    && textArea.Document.CustomLineManager.IsReadOnly(textArea.Caret.Line, false))
+					{
+						// prevent dragging text into readonly section
+						return;
+					}
 					if (e.Data.GetDataPresent(typeof(DefaultSelection))) {
 						ISelection sel = (ISelection)e.Data.GetData(typeof(DefaultSelection));
 						if (sel.ContainsPosition(textArea.Caret.Position)) {
 							return;
 						}
 						if (GetDragDropEffect(e) == DragDropEffects.Move) {
+							if (textArea.TextEditorProperties.UseCustomLine
+							    && textArea.Document.CustomLineManager.IsReadOnly(sel, false))
+							{
+								// prevent dragging text out of readonly section
+								return;
+							}
 							int len = sel.Length;
 							textArea.Document.Remove(sel.Offset, len);
 							if (sel.Offset < offset) {