[gnome-builder] highlighter: add pause/unpause API

[Christian Hergert <chergert src gnome org>]

commit df4d3accd19c44e4e3e0082a2720a4c5af933803
Author: Christian Hergert <chergert redhat com>
Date:   Sun Jun 18 01:00:57 2017 -0700

    highlighter: add pause/unpause API
    
    This is useful to disable the highlighter at certain times like when
    loading the buffer.

 libide/highlighting/ide-highlight-engine.c |   16 ++++++++++++++++
 libide/highlighting/ide-highlight-engine.h |    2 ++
 2 files changed, 18 insertions(+), 0 deletions(-)
---
diff --git a/libide/highlighting/ide-highlight-engine.c b/libide/highlighting/ide-highlight-engine.c
index f06fd39..3363242 100644
--- a/libide/highlighting/ide-highlight-engine.c
+++ b/libide/highlighting/ide-highlight-engine.c
@@ -1071,3 +1071,19 @@ ide_highlight_engine_get_style (IdeHighlightEngine *self,
 {
   return get_tag_from_style (self, style_name, FALSE);
 }
+
+void
+ide_highlight_engine_pause (IdeHighlightEngine *self)
+{
+  g_return_if_fail (IDE_IS_HIGHLIGHT_ENGINE (self));
+
+  dzl_signal_group_block (self->signal_group);
+}
+
+void
+ide_highlight_engine_unpause (IdeHighlightEngine *self)
+{
+  g_return_if_fail (IDE_IS_HIGHLIGHT_ENGINE (self));
+
+  dzl_signal_group_unblock (self->signal_group);
+}
diff --git a/libide/highlighting/ide-highlight-engine.h b/libide/highlighting/ide-highlight-engine.h
index 6f522a9..5a5a9ad 100644
--- a/libide/highlighting/ide-highlight-engine.h
+++ b/libide/highlighting/ide-highlight-engine.h
@@ -39,6 +39,8 @@ void                ide_highlight_engine_invalidate      (IdeHighlightEngine *se
                                                           const GtkTextIter  *end);
 GtkTextTag         *ide_highlight_engine_get_style       (IdeHighlightEngine *self,
                                                           const gchar        *style_name);
+void                ide_highlight_engine_pause           (IdeHighlightEngine *self);
+void                ide_highlight_engine_unpause         (IdeHighlightEngine *self);
 
 G_END_DECLS