[gnome-builder] editor: mark the first line as added when modifying a new buffer.

[Christian Hergert <chergert src gnome org>]

commit a84f4d768aba66c6bb655d9d0ab2a6ff42bd17b4
Author: Christian Hergert <christian hergert me>
Date:   Mon Sep 15 01:24:16 2014 -0700

    editor: mark the first line as added when modifying a new buffer.
    
    Just a small check to see if we added a \n from the first line so that
    it gets marked as added.

 src/editor/gb-source-change-monitor.c |   15 +++++++++++++++
 1 files changed, 15 insertions(+), 0 deletions(-)
---
diff --git a/src/editor/gb-source-change-monitor.c b/src/editor/gb-source-change-monitor.c
index a559ebc..e6d4273 100644
--- a/src/editor/gb-source-change-monitor.c
+++ b/src/editor/gb-source-change-monitor.c
@@ -188,8 +188,23 @@ on_insert_text_after_cb (GbSourceChangeMonitor *monitor,
 
   if (g_strcmp0 (text, "\n") == 0)
     {
+      GtkTextIter begin;
+      GtkTextIter end;
+
       flags = (GB_SOURCE_CHANGE_ADDED | GB_SOURCE_CHANGE_DIRTY);
       gb_source_change_monitor_insert (monitor, line, flags);
+
+      /*
+       * WORKAROUND:
+       *
+       * The following allows us to mark the first line as "added" when we
+       * edit a new buffer and type \n on the first line. Otherwise the first
+       * line shows nothing and the following lines would show "added". While
+       * technically accurate, it's not very helpful.
+       */
+      gtk_text_buffer_get_bounds (buffer, &begin, &end);
+      if (gtk_text_iter_get_line (&end) == 1)
+        gb_source_change_monitor_set_line (monitor, 0, flags);
     }
   else if (strchr (text, '\n') == NULL)
     {