[gtksourceview] vim: fix dd at end of buffer

[Christian Hergert <chergert src gnome org>]

commit 820b558003f29071a987bf6a9fd41f78666f5df0
Author: Christian Hergert <chergert redhat com>
Date:   Mon Nov 22 06:43:52 2021 -0800

    vim: fix dd at end of buffer
    
    This also fixes things like `dj` the line above the EOB.

 gtksourceview/vim/gtksourcevimcommand.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)
---
diff --git a/gtksourceview/vim/gtksourcevimcommand.c b/gtksourceview/vim/gtksourcevimcommand.c
index cca0a6f7..46b9bf65 100644
--- a/gtksourceview/vim/gtksourcevimcommand.c
+++ b/gtksourceview/vim/gtksourcevimcommand.c
@@ -211,6 +211,24 @@ gtk_source_vim_command_delete (GtkSourceVimCommand *self)
 
        gtk_source_vim_state_set_current_register_value (GTK_SOURCE_VIM_STATE (self), text);
 
+       if (self->motion != NULL)
+       {
+               if (gtk_source_vim_motion_is_linewise (self->motion))
+               {
+                       gtk_text_iter_order (&iter, &selection);
+
+                       /* If we are at the end of the buffer, then we need
+                        * to emulate linewise by swallowing the leading
+                        * newline.
+                        */
+                       if (gtk_text_iter_is_end (&selection) &&
+                           gtk_text_iter_starts_line (&iter))
+                       {
+                               gtk_text_iter_backward_char (&iter);
+                       }
+               }
+       }
+
        gtk_text_buffer_begin_user_action (GTK_TEXT_BUFFER (buffer));
        gtk_text_buffer_delete (GTK_TEXT_BUFFER (buffer), &iter, &selection);
        gtk_text_buffer_end_user_action (GTK_TEXT_BUFFER (buffer));