[gnome-builder/wip/libide] libide: leave cursor on proper line when joining lines

[Christian Hergert <chergert src gnome org>]

commit 26ba6aa17e598d5b720890af42b5ec5fe4793839
Author: Christian Hergert <christian hergert me>
Date:   Fri Mar 6 17:59:36 2015 -0800

    libide: leave cursor on proper line when joining lines
    
    This fixes the situation that you join lines and the trailing line
    (which has an iter at offset zero) is not empty. We put the insertion
    mark back on the same line. Bindings can use this to place the cursor
    wherever they want on the line that was actually joined.

 libide/ide-source-view.c |   15 +++++++++++++++
 1 files changed, 15 insertions(+), 0 deletions(-)
---
diff --git a/libide/ide-source-view.c b/libide/ide-source-view.c
index 204b013..640af1e 100644
--- a/libide/ide-source-view.c
+++ b/libide/ide-source-view.c
@@ -1869,14 +1869,29 @@ ide_source_view_real_join_lines (IdeSourceView *self)
   GtkTextBuffer *buffer;
   GtkTextIter begin;
   GtkTextIter end;
+  guint line;
 
   g_assert (IDE_IS_SOURCE_VIEW (self));
 
   buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (self));
   gtk_text_buffer_get_selection_bounds (buffer, &begin, &end);
 
+  if (gtk_text_iter_equal (&begin, &end))
+    return;
+
+  gtk_text_iter_order (&begin, &end);
+
+  line = gtk_text_iter_get_line (&begin);
+
+  if (gtk_text_iter_starts_line (&end) && !gtk_text_iter_ends_line (&end))
+    gtk_text_iter_backward_char (&end);
+
   if (GTK_SOURCE_IS_BUFFER (buffer))
     gtk_source_buffer_join_lines (GTK_SOURCE_BUFFER (buffer), &begin, &end);
+
+  gtk_text_buffer_get_selection_bounds (buffer, &begin, &end);
+  gtk_text_iter_set_line (&begin, line);
+  gtk_text_buffer_select_range (buffer, &begin, &begin);
 }
 
 static void