[gnome-builder/wip/chergert/headerbar] omnibar: add support for omnibar:active state flag

[Christian Hergert <chergert src gnome org>]

commit 4a6c4e4fd5930bb4fc406c0f55c51827fab9d918
Author: Christian Hergert <chergert redhat com>
Date:   Sun Jun 26 16:37:14 2016 -0700

    omnibar: add support for omnibar:active state flag

 data/theme/Adwaita-shared.css   |    3 ++-
 libide/workbench/ide-omni-bar.c |   29 +++++++++++++++++++++++++++++
 2 files changed, 31 insertions(+), 1 deletions(-)
---
diff --git a/data/theme/Adwaita-shared.css b/data/theme/Adwaita-shared.css
index 78abae7..b64a9d9 100644
--- a/data/theme/Adwaita-shared.css
+++ b/data/theme/Adwaita-shared.css
@@ -151,7 +151,8 @@ omnibar entry {
   background-color: @theme_bg_color;
   color: alpha(@theme_fg_color, 0.8);
 }
-omnibar:hover entry {
+omnibar:hover entry,
+omnibar:active entry {
   background-color: mix(@theme_bg_color, @content_view_bg, 0.9);
   color: @theme_fg_color;
 }
diff --git a/libide/workbench/ide-omni-bar.c b/libide/workbench/ide-omni-bar.c
index 0000533..a9ef27a 100644
--- a/libide/workbench/ide-omni-bar.c
+++ b/libide/workbench/ide-omni-bar.c
@@ -476,13 +476,36 @@ multipress_pressed_cb (GtkGestureMultiPress *gesture,
                        gdouble               y,
                        IdeOmniBar           *self)
 {
+  GtkStyleContext *style_context;
+  GtkStateFlags state_flags;
+
   g_assert (IDE_IS_OMNI_BAR (self));
 
   gtk_widget_show (GTK_WIDGET (self->popover));
+
+  style_context = gtk_widget_get_style_context (GTK_WIDGET (self));
+  state_flags = gtk_style_context_get_state (style_context);
+  gtk_style_context_set_state (style_context, state_flags | GTK_STATE_FLAG_ACTIVE);
+
   gtk_gesture_set_state (GTK_GESTURE (gesture), GTK_EVENT_SEQUENCE_CLAIMED);
 }
 
 static void
+ide_omni_bar_popover_closed (IdeOmniBar *self,
+                             GtkPopover *popover)
+{
+  GtkStyleContext *style_context;
+  GtkStateFlags state_flags;
+
+  g_assert (IDE_IS_OMNI_BAR (self));
+  g_assert (GTK_IS_POPOVER (popover));
+
+  style_context = gtk_widget_get_style_context (GTK_WIDGET (self));
+  state_flags = gtk_style_context_get_state (style_context);
+  gtk_style_context_set_state (style_context, state_flags & ~GTK_STATE_FLAG_ACTIVE);
+}
+
+static void
 ide_omni_bar_finalize (GObject *object)
 {
   IdeOmniBar *self = (IdeOmniBar *)object;
@@ -556,6 +579,12 @@ ide_omni_bar_init (IdeOmniBar *self)
                            self,
                            G_CONNECT_SWAPPED);
 
+  g_signal_connect_object (self->popover,
+                           "closed",
+                           G_CALLBACK (ide_omni_bar_popover_closed),
+                           self,
+                           G_CONNECT_SWAPPED);
+
   self->gesture = gtk_gesture_multi_press_new (GTK_WIDGET (self->event_box));
   g_signal_connect (self->gesture, "pressed", G_CALLBACK (multipress_pressed_cb), self);