Text framework: Added TextEditor::Replace()

Call Replace() on TextDocument, so that there are not two edits later
on once UndoableEdit stuff is supported.

src/apps/haikudepot/textview/TextEditor.cpp

@@ -240,11 +240,7 @@ TextEditor::KeyDown(KeyEvent event)
 				// Handle null-termintating the string
 				BString text(event.bytes, event.length);
 
-				// Remove selection, if any
-				if (HasSelection())
-					Remove(SelectionStart(), SelectionLength());
-
-				Insert(fSelection.Caret(), text);
+				Replace(SelectionStart(), SelectionLength(), text);
 			}
 			break;
 	}
@@ -260,9 +256,6 @@ TextEditor::Insert(int32 offset, const BString& string)
 	status_t ret = fDocument->Insert(offset, string, fStyleAtCaret);
 
 	if (ret == B_OK) {
-		// TODO: Via listener, and only affected paragraphs
-		fLayout->Invalidate();
-
 		_SetCaretOffset(offset + string.CountChars(), true, false, true);
 
 		fDocument->PrintToStream();
@@ -281,9 +274,6 @@ TextEditor::Remove(int32 offset, int32 length)
 	status_t ret = fDocument->Remove(offset, length);
 
 	if (ret == B_OK) {
-		// TODO: Via listener, and only affected paragraphs
-		fLayout->Invalidate();
-
 		_SetCaretOffset(offset, true, false, true);
 
 		fDocument->PrintToStream();
@@ -293,6 +283,24 @@ TextEditor::Remove(int32 offset, int32 length)
 }
 
 
+status_t
+TextEditor::Replace(int32 offset, int32 length, const BString& string)
+{
+	if (!fEditingEnabled || fDocument.Get() == NULL)
+		return B_ERROR;
+
+	status_t ret = fDocument->Replace(offset, length, string);
+
+	if (ret == B_OK) {
+		_SetCaretOffset(offset + string.CountChars(), true, false, true);
+
+		fDocument->PrintToStream();
+	}
+
+	return ret;
+}
+
+
 // #pragma mark -
 
 

src/apps/haikudepot/textview/TextEditor.h

@@ -61,6 +61,8 @@ class TextEditor : public BReferenceable {
 
 	virtual	status_t			Insert(int32 offset, const BString& string);
 	virtual	status_t			Remove(int32 offset, int32 length);
+	virtual	status_t			Replace(int32 offset, int32 length,
+									const BString& string);
 
 			void				LineUp(bool select);
 			void				LineDown(bool select);