[gnome-builder/auto-indent] auto-indent: handle unindent when { is not the first character.

[Christian Hergert <chergert src gnome org>]

commit 1f9d81d4551860a13689e79e83e59eeedb38236a
Author: Christian Hergert <christian hergert me>
Date:   Thu Sep 18 16:39:51 2014 -0700

    auto-indent: handle unindent when { is not the first character.

 src/editor/gb-source-auto-indenter-c.c |   27 +++++++++++++++++++++++++++
 1 files changed, 27 insertions(+), 0 deletions(-)
---
diff --git a/src/editor/gb-source-auto-indenter-c.c b/src/editor/gb-source-auto-indenter-c.c
index 90eebcf..366af1b 100644
--- a/src/editor/gb-source-auto-indenter-c.c
+++ b/src/editor/gb-source-auto-indenter-c.c
@@ -177,6 +177,26 @@ line_is_space (GtkTextIter *iter)
 }
 
 static gboolean
+starts_line_space_ok (GtkTextIter *iter)
+{
+  GtkTextIter tmp;
+
+  gtk_text_buffer_get_iter_at_line (gtk_text_iter_get_buffer (iter),
+                                    &tmp,
+                                    gtk_text_iter_get_line (iter));
+
+  for (;
+       gtk_text_iter_compare (&tmp, iter) < 0;
+       gtk_text_iter_forward_char (&tmp))
+    {
+      if (!g_unichar_isspace (gtk_text_iter_get_char (&tmp)))
+        return FALSE;
+    }
+
+  return TRUE;
+}
+
+static gboolean
 backward_find_stmt_expr (GtkTextIter *iter)
 {
   return FALSE;
@@ -591,6 +611,13 @@ maybe_unindent_brace (GbSourceAutoIndenterC *c,
       GString *str;
       guint offset;
 
+      /*
+       * Handle the case where { is not the first non-whitespace
+       * character on the line.
+       */
+      if (!starts_line_space_ok (begin))
+        backward_to_line_first_char (begin);
+
       offset = gtk_text_iter_get_line_offset (begin);
       str = g_string_new (NULL);
       build_indent (c, offset, begin, str);