Add GtkHdyViewSwitcher

This is imported from HdyViewSwitcher from libhandy 0.0.10.

gtk/Makefile.am

@@ -363,7 +363,8 @@ gtk_semi_private_h_sources = \
 
 gtk_private_type_h_sources =	\
 	gtkcsstypesprivate.h	\
-	gtktexthandleprivate.h
+	gtktexthandleprivate.h	\
+	hdy-view-switcher-private.h
 
 
 # GTK+ header files that don't get installed
@@ -602,6 +603,7 @@ gtk_private_h_sources =		\
 	gtktreemenu.h		\
 	gdkpixbufutilsprivate.h \
 	hdy-style-private.h	\
+	hdy-view-switcher-private.h	\
 	hdy-view-switcher-button-private.h	\
 	open-type-layout.h	\
 	language-names.h	\
@@ -978,6 +980,7 @@ gtk_base_c_sources = 		\
 	gtkwin32draw.c		\
 	gtkwin32theme.c		\
 	gdkpixbufutils.c	\
+	hdy-view-switcher.c	\
 	hdy-view-switcher-button.c	\
 	language-names.c	\
 	script-names.c

gtk/gtkprivate.h

@@ -30,6 +30,7 @@
 
 #include "gtkcsstypesprivate.h"
 #include "gtktexthandleprivate.h"
+#include "hdy-view-switcher-private.h"
 
 G_BEGIN_DECLS
 

gtk/hdy-view-switcher-private.h

+/*
+ * Copyright (C) 2019 Zander Brown <zbrown@gnome.org>
+ * Copyright (C) 2019 Purism SPC
+ *
+ * SPDX-License-Identifier: LGPL-2.1+
+ */
+
+#pragma once
+
+#include "gtkbox.h"
+#include "gtkhdytype.h"
+#include "gtkstack.h"
+
+G_BEGIN_DECLS
+
+#define GTK_TYPE_HDY_VIEW_SWITCHER (gtk_hdy_view_switcher_get_type())
+
+struct _GtkHdyViewSwitcherClass {
+  GtkBoxClass parent_class;
+};
+
+GTK_HDY_DECLARE_DERIVABLE_TYPE (GtkHdyViewSwitcher, gtk_hdy_view_switcher, GTK, HDY_VIEW_SWITCHER, GtkBox)
+
+typedef enum {
+  GTK_HDY_VIEW_SWITCHER_POLICY_AUTO,
+  GTK_HDY_VIEW_SWITCHER_POLICY_NARROW,
+  GTK_HDY_VIEW_SWITCHER_POLICY_WIDE,
+} GtkHdyViewSwitcherPolicy;
+
+GtkHdyViewSwitcher *gtk_hdy_view_switcher_new (void);
+
+GtkHdyViewSwitcherPolicy gtk_hdy_view_switcher_get_policy (GtkHdyViewSwitcher *self);
+void                     gtk_hdy_view_switcher_set_policy (GtkHdyViewSwitcher       *self,
+                                                           GtkHdyViewSwitcherPolicy  policy);
+
+GtkIconSize gtk_hdy_view_switcher_get_icon_size (GtkHdyViewSwitcher *self);
+void        gtk_hdy_view_switcher_set_icon_size (GtkHdyViewSwitcher *self,
+                                                 GtkIconSize         icon_size);
+
+PangoEllipsizeMode gtk_hdy_view_switcher_get_narrow_ellipsize (GtkHdyViewSwitcher *self);
+void               gtk_hdy_view_switcher_set_narrow_ellipsize (GtkHdyViewSwitcher *self,
+                                                               PangoEllipsizeMode  mode);
+
+GtkStack *gtk_hdy_view_switcher_get_stack (GtkHdyViewSwitcher *self);
+void      gtk_hdy_view_switcher_set_stack (GtkHdyViewSwitcher *self,
+                                           GtkStack           *stack);
+
+G_END_DECLS

gtk/style/hdy-view-switcher.css

+hdyviewswitcher {
+  margin: 0;
+  padding: 0;
+}