From a50151e0dfa473c33c3edcee591ceaf682c5d663 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?S=C3=A9bastien=20Wilmet?= <swilmet@gnome.org>
Date: Wed, 10 Apr 2013 13:39:54 +0200
Subject: [PATCH] textbuffer: fix selection replacement when pasting

It is more logical to first delete the selection and then pasting the
text. When the selection and the text contain tags, the new behavior is
more natural.

A segfault in paste_from_buffer() is also avoided. The segfault occurs when
the text to paste is deleted because it is the selection.

https://bugzilla.gnome.org/show_bug.cgi?id=339539
---
 gtk/gtktextbuffer.c | 49 ++++++++++++++++++---------------------------
 1 file changed, 19 insertions(+), 30 deletions(-)

diff --git a/gtk/gtktextbuffer.c b/gtk/gtktextbuffer.c
index 97ddd6dd6b..208bca3bec 100644
--- a/gtk/gtktextbuffer.c
+++ b/gtk/gtktextbuffer.c
@@ -3322,27 +3322,11 @@ pre_paste_prep (ClipboardRequest *request_data,
   
   get_paste_point (buffer, insert_point, TRUE);
 
-  /* If we're going to replace the selection, we insert before it to
-   * avoid messing it up, then we delete the selection after inserting.
-   */
   if (request_data->replace_selection)
     {
       GtkTextIter start, end;
       
       if (gtk_text_buffer_get_selection_bounds (buffer, &start, &end))
-        *insert_point = start;
-    }
-}
-
-static void
-post_paste_cleanup (ClipboardRequest *request_data)
-{
-  if (request_data->replace_selection)
-    {
-      GtkTextIter start, end;
-      
-      if (gtk_text_buffer_get_selection_bounds (request_data->buffer,
-                                                &start, &end))
         {
           if (request_data->interactive)
             gtk_text_buffer_delete_interactive (request_data->buffer,
@@ -3351,6 +3335,8 @@ post_paste_cleanup (ClipboardRequest *request_data)
                                                 request_data->default_editable);
           else
             gtk_text_buffer_delete (request_data->buffer, &start, &end);
+
+          *insert_point = start;
         }
     }
 }
@@ -3395,8 +3381,6 @@ clipboard_text_received (GtkClipboard *clipboard,
         gtk_text_buffer_insert (buffer, &insert_point,
                                 str, -1);
 
-      post_paste_cleanup (request_data);
-      
       if (request_data->interactive) 
 	gtk_text_buffer_end_user_action (buffer);
 
@@ -3496,11 +3480,11 @@ clipboard_rich_text_received (GtkClipboard *clipboard,
 
   if (text != NULL && length > 0)
     {
-      pre_paste_prep (request_data, &insert_point);
-
       if (request_data->interactive)
         gtk_text_buffer_begin_user_action (request_data->buffer);
 
+      pre_paste_prep (request_data, &insert_point);
+
       if (!request_data->interactive ||
           gtk_text_iter_can_insert (&insert_point,
                                     request_data->default_editable))
@@ -3525,10 +3509,7 @@ clipboard_rich_text_received (GtkClipboard *clipboard,
       emit_paste_done (request_data->buffer, clipboard);
 
       if (retval)
-        {
-          post_paste_cleanup (request_data);
-          return;
-        }
+        return;
     }
 
   /* Request the text selection instead */
@@ -3546,15 +3527,24 @@ paste_from_buffer (GtkClipboard      *clipboard,
 {
   GtkTextIter insert_point;
   GtkTextBuffer *buffer = request_data->buffer;
-  
+
   /* We're about to emit a bunch of signals, so be safe */
   g_object_ref (src_buffer);
-  
-  pre_paste_prep (request_data, &insert_point);
-  
+
+  /* Replacing the selection with itself */
+  if (request_data->replace_selection &&
+      buffer == src_buffer)
+    {
+      /* Clear the paste point if needed */
+      get_paste_point (buffer, &insert_point, TRUE);
+      goto done;
+    }
+
   if (request_data->interactive) 
     gtk_text_buffer_begin_user_action (buffer);
 
+  pre_paste_prep (request_data, &insert_point);
+
   if (!gtk_text_iter_equal (start, end))
     {
       if (!request_data->interactive ||
@@ -3567,11 +3557,10 @@ paste_from_buffer (GtkClipboard      *clipboard,
                                            request_data->interactive);
     }
 
-  post_paste_cleanup (request_data);
-      
   if (request_data->interactive) 
     gtk_text_buffer_end_user_action (buffer);
 
+done:
   emit_paste_done (buffer, clipboard);
 
   g_object_unref (src_buffer);