fontchooser: Add global keynav

Starting to type should focus the search entry and start
a search.

gtk/gtkfontchooserdialog.c

@@ -26,6 +26,7 @@
 #include "gtkfontchooserdialog.h"
 #include "gtkfontchooser.h"
 #include "gtkfontchooserwidget.h"
+#include "gtkfontchooserwidgetprivate.h"
 #include "gtkfontchooserutils.h"
 #include "gtkbox.h"
 #include "gtkintl.h"
@@ -120,6 +121,21 @@ font_activated_cb (GtkFontChooser *fontchooser,
   gtk_dialog_response (dialog, GTK_RESPONSE_OK);
 }
 
+static gboolean
+gtk_font_chooser_dialog_key_press_event (GtkWidget   *dialog,
+                                         GdkEventKey *event)
+{
+  GtkFontChooserDialog *fdialog = GTK_FONT_CHOOSER_DIALOG (dialog);
+  gboolean handled = FALSE;
+
+  handled = GTK_WIDGET_CLASS (gtk_font_chooser_dialog_parent_class)->key_press_event (dialog, event);
+
+  if (!handled)
+    handled = gtk_font_chooser_widget_handle_event (fdialog->priv->fontchooser, event);
+
+  return handled;
+}
+
 static void
 gtk_font_chooser_dialog_class_init (GtkFontChooserDialogClass *klass)
 {
@@ -129,6 +145,8 @@ gtk_font_chooser_dialog_class_init (GtkFontChooserDialogClass *klass)
   gobject_class->get_property = gtk_font_chooser_dialog_get_property;
   gobject_class->set_property = gtk_font_chooser_dialog_set_property;
 
+  widget_class->key_press_event = gtk_font_chooser_dialog_key_press_event;
+
   _gtk_font_chooser_install_properties (gobject_class);
 
   /* Bind class to template

gtk/gtkfontchooserwidget.c

@@ -24,6 +24,7 @@
 #include <atk/atk.h>
 
 #include "gtkfontchooserwidget.h"
+#include "gtkfontchooserwidgetprivate.h"
 
 #include "gtkadjustment.h"
 #include "gtkbuildable.h"
@@ -1401,3 +1402,14 @@ gtk_font_chooser_widget_iface_init (GtkFontChooserIface *iface)
   iface->set_font_map = gtk_font_chooser_widget_set_font_map;
   iface->get_font_map = gtk_font_chooser_widget_get_font_map;
 }
+
+gboolean
+gtk_font_chooser_widget_handle_event (GtkWidget   *widget,
+                                      GdkEventKey *key_event)
+{
+  GtkFontChooserWidget *fontchooser = GTK_FONT_CHOOSER_WIDGET (widget);
+  GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
+  GdkEvent *event = (GdkEvent *)key_event;
+
+  return gtk_search_entry_handle_event (GTK_SEARCH_ENTRY (priv->search_entry), event);
+}

gtk/gtkfontchooserwidgetprivate.h

@@ -0,0 +1,30 @@
+/* GTK - The GIMP Toolkit
+ * Copyright (C) 2017 Red Hat, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __GTK_FONT_CHOOSER_WIDGET_PRIVATE_H__
+#define __GTK_FONT_CHOOSER_WIDGET_PRIVATE_H__
+
+#include "gtkfontchooserwidget.h"
+
+G_BEGIN_DECLS
+
+gboolean gtk_font_chooser_widget_handle_event (GtkWidget   *widget,
+                                               GdkEventKey *event);
+
+G_END_DECLS
+
+#endif /* __GTK_FONT_CHOOSER_WIDGET_PRIVATE_H__ */