[gimp] app: honor text direction when moving the cursor

[Michael Natterer <mitch src gnome org>]

commit 0c7ec05035e8a2bedb9f865705eb969f0f4d081a
Author: Michael Natterer <mitch gimp org>
Date:   Thu Oct 14 01:01:33 2010 +0200

    app: honor text direction when moving the cursor
    
    Use pango_layout_move_cursor_visually() instead of e.g. simply using
    gtk_text_iter_forward_cursor_position() when "right" was pressed.
    This is much more correct now but still not 100% right.

 app/tools/gimptexttool-editor.c |   32 ++++++++++++++++++++++++++++----
 1 files changed, 28 insertions(+), 4 deletions(-)
---
diff --git a/app/tools/gimptexttool-editor.c b/app/tools/gimptexttool-editor.c
index 8d7aa55..63dff30 100644
--- a/app/tools/gimptexttool-editor.c
+++ b/app/tools/gimptexttool-editor.c
@@ -675,10 +675,34 @@ gimp_text_tool_move_cursor (GimpTextTool    *text_tool,
     case GTK_MOVEMENT_VISUAL_POSITIONS:
       if (! cancel_selection)
         {
-          if (count < 0)
-            gtk_text_iter_backward_cursor_position (&cursor);
-          else if (count > 0)
-            gtk_text_iter_forward_cursor_position (&cursor);
+          PangoLayout *layout;
+          gint         index;
+          gint         trailing;
+
+          index = gimp_text_buffer_get_iter_index (text_tool->buffer,
+                                                   &cursor, TRUE);
+
+          layout = gimp_text_layout_get_pango_layout (text_tool->layout);
+
+          while (count != 0)
+            {
+              if (count > 0)
+                {
+                  pango_layout_move_cursor_visually (layout, TRUE, index, 0, 1,
+                                                     &index, &trailing);
+                  count--;
+                }
+              else
+                {
+                  pango_layout_move_cursor_visually (layout, TRUE, index, 0, -1,
+                                                     &index, &trailing);
+                  count++;
+                }
+            }
+
+          gimp_text_buffer_get_iter_at_index (text_tool->buffer,
+                                              &cursor, index, TRUE);
+          gtk_text_iter_forward_chars (&cursor, trailing);
         }
       break;