Gather gtk+ compatibility code in a single file

There are gtk+ version checks in several source files to add
compatibility implementations of gtk3 functions not available
in gtk2. This commit gathers all of them in a gtk-compat.h header,
similar to what is done for glib-compat.h

5 files changed, 60 insertions, 42 deletions

diff --git a/gtk/Makefile.am b/gtk/Makefile.am
index e28220c..8da1a11 100644
--- a/gtk/Makefile.am
+++ b/gtk/Makefile.am
@@ -122,6 +122,7 @@ SPICE_GTK_LIBADD_COMMON =		\
 
 SPICE_GTK_SOURCES_COMMON =		\
 	glib-compat.h			\
+	gtk-compat.h			\
 	spice-util.c			\
 	spice-util-priv.h		\
 	spice-gtk-session.c		\
diff --git a/gtk/gtk-compat.h b/gtk/gtk-compat.h
new file mode 100644
index 0000000..be143b2
--- /dev/null
+++ b/gtk/gtk-compat.h
@@ -0,0 +1,56 @@
+/* -*- Mode: C; c-basic-offset: 4; indent-tabs-mode: nil -*- */
+/*
+   Copyright (C) 2012-2014 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 2.1 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_COMPAT_H
+#define GTK_COMPAT_H
+
+#include "config.h"
+
+#include <gtk/gtk.h>
+
+#if !GTK_CHECK_VERSION (2, 91, 0)
+#define GDK_IS_X11_DISPLAY(D) TRUE
+#define gdk_window_get_display(W) gdk_drawable_get_display(GDK_DRAWABLE(W))
+#endif
+
+#if GTK_CHECK_VERSION (2, 91, 0)
+static inline void gdk_drawable_get_size(GdkWindow *w, gint *ww, gint *wh)
+{
+    *ww = gdk_window_get_width(w);
+    *wh = gdk_window_get_height(w);
+}
+#endif
+
+#if !GTK_CHECK_VERSION(2, 20, 0)
+static inline gboolean gtk_widget_get_realized(GtkWidget *widget)
+{
+    g_return_val_if_fail (GTK_IS_WIDGET (widget), FALSE);
+    return GTK_WIDGET_REALIZED(widget);
+}
+#endif
+
+#if !GTK_CHECK_VERSION (3, 0, 0)
+#define cairo_rectangle_int_t GdkRectangle
+#define cairo_region_t GdkRegion
+#define cairo_region_create_rectangle gdk_region_rectangle
+#define cairo_region_subtract_rectangle(_dest,_rect) { GdkRegion *_region = gdk_region_rectangle (_rect); gdk_region_subtract (_dest, _region); gdk_region_destroy (_region); }
+#define cairo_region_destroy gdk_region_destroy
+
+#define gdk_window_get_display(W) gdk_drawable_get_display(GDK_DRAWABLE(W))
+#endif
+
+#endif /* GTK_COMPAT_H */
diff --git a/gtk/spice-widget-cairo.c b/gtk/spice-widget-cairo.c
index 107b0dc..881cc5d 100644
--- a/gtk/spice-widget-cairo.c
+++ b/gtk/spice-widget-cairo.c
@@ -17,18 +17,10 @@
 */
 #include "config.h"
 
+#include "gtk-compat.h"
 #include "spice-widget.h"
 #include "spice-widget-priv.h"
 
-/* Some compatibility defines to let us build on both Gtk2 and Gtk3 */
-#if GTK_CHECK_VERSION (2, 91, 0)
-
-static inline void gdk_drawable_get_size(GdkWindow *w, gint *ww, gint *wh)
-{
-       *ww = gdk_window_get_width(w);
-       *wh = gdk_window_get_height(w);
-}
-#endif
 
 G_GNUC_INTERNAL
 int spicex_image_create(SpiceDisplay *display)
@@ -72,14 +64,6 @@ void spicex_image_destroy(SpiceDisplay *display)
     d->convert = FALSE;
 }
 
-#if !GTK_CHECK_VERSION (3, 0, 0)
-#define cairo_rectangle_int_t GdkRectangle
-#define cairo_region_t GdkRegion
-#define cairo_region_create_rectangle gdk_region_rectangle
-#define cairo_region_subtract_rectangle(_dest,_rect) { GdkRegion *_region = gdk_region_rectangle (_rect); gdk_region_subtract (_dest, _region); gdk_region_destroy (_region); }
-#define cairo_region_destroy gdk_region_destroy
-#endif
-
 G_GNUC_INTERNAL
 void spicex_draw_event(SpiceDisplay *display, cairo_t *cr)
 {
diff --git a/gtk/spice-widget.c b/gtk/spice-widget.c
index 2044513..9b835f0 100644
--- a/gtk/spice-widget.c
+++ b/gtk/spice-widget.c
@@ -41,28 +41,9 @@
 #include "vncdisplaykeymap.h"
 
 #include "glib-compat.h"
+#include "gtk-compat.h"
 
 /* Some compatibility defines to let us build on both Gtk2 and Gtk3 */
-#if GTK_CHECK_VERSION (2, 91, 0)
-static inline void gdk_drawable_get_size(GdkWindow *w, gint *ww, gint *wh)
-{
-    *ww = gdk_window_get_width(w);
-    *wh = gdk_window_get_height(w);
-}
-#endif
-
-#if !GTK_CHECK_VERSION (2, 91, 0)
-#define GDK_IS_X11_DISPLAY(D) TRUE
-#define gdk_window_get_display(W) gdk_drawable_get_display(GDK_DRAWABLE(W))
-#endif
-
-#if !GTK_CHECK_VERSION(2, 20, 0)
-static gboolean gtk_widget_get_realized(GtkWidget *widget)
-{
-    g_return_val_if_fail (GTK_IS_WIDGET (widget), FALSE);
-    return GTK_WIDGET_REALIZED(widget);
-}
-#endif
 
 /**
  * SECTION:spice-widget
diff --git a/gtk/vncdisplaykeymap.c b/gtk/vncdisplaykeymap.c
index 22c6b07..b2da5e5 100644
--- a/gtk/vncdisplaykeymap.c
+++ b/gtk/vncdisplaykeymap.c
@@ -12,6 +12,7 @@
 #include <gtk/gtk.h>
 #include <gdk/gdk.h>
 #include <gdk/gdkkeysyms.h>
+#include "gtk-compat.h"
 #include "vncdisplaykeymap.h"
 
 #include "spice-util.h"
@@ -50,11 +51,6 @@
 #define GDK_Tab GDK_KEY_Tab
 #endif
 
-#if !GTK_CHECK_VERSION(3,0,0)
-#define gdk_window_get_display(W) gdk_drawable_get_display(GDK_DRAWABLE(W))
-#endif
-
-
 /* keycode translation for sending ISO_Left_Send
  * to vncserver
  */