[gtk/gtk-3-24: 1/2] Add a public header for Cocoa access functions.

[Matthias Clasen <matthiasc src gnome org>]

commit 242b76a7711ab6326a220f9e65e6fc282dc2f8b1
Author: John Ralls <jralls ceridwen us>
Date:   Fri Apr 16 16:56:55 2021 -0700

    Add a public header for Cocoa access functions.
    
    Some applications need to access gdk_quartz_window_get_nsview,
    gdk_quartz_window_get_nswindow, and gdk_quartz_event_get_nsevent
    so move these from the private gdkquartz-gtk-only.h to a new
    header gdkquartz-cocoa-access.h. Don't include this header in
    gdkquartz.h so that user code that doesn't need to access these
    functins isn't required to compile with Objective C/C++.
    
    Closes https://gitlab.gnome.org/GNOME/gtk/-/issues/1737

 gdk/quartz/Makefile.am              |  1 +
 gdk/quartz/gdkglcontext-quartz.c    |  2 +-
 gdk/quartz/gdkinternal-quartz.h     |  6 +++++-
 gdk/quartz/gdkquartz-cocoa-access.h | 37 +++++++++++++++++++++++++++++++++++++
 gdk/quartz/gdkquartz-gtk-only.h     |  8 --------
 gdk/quartz/gdkutils-quartz.c        |  1 +
 gdk/quartz/gdkwindow-quartz.c       |  2 +-
 gdk/quartz/meson.build              |  1 +
 gtk/gtkdnd-quartz.c                 |  1 +
 gtk/gtkfilechoosernativequartz.c    |  2 +-
 modules/input/imquartz.c            |  2 +-
 11 files changed, 50 insertions(+), 13 deletions(-)
---
diff --git a/gdk/quartz/Makefile.am b/gdk/quartz/Makefile.am
index 141d931c64..4782c5aab6 100644
--- a/gdk/quartz/Makefile.am
+++ b/gdk/quartz/Makefile.am
@@ -60,6 +60,7 @@ libgdkinclude_HEADERS =       \
        gdkquartz.h
 
 libgdkquartzinclude_HEADERS =          \
+       gdkquartz-cocoa-access.h        \
        gdkquartz-gtk-only.h            \
        gdkquartzcursor.h               \
        gdkquartzdevice-core.h          \
diff --git a/gdk/quartz/gdkglcontext-quartz.c b/gdk/quartz/gdkglcontext-quartz.c
index 5c4b8e7ac9..a244d66e43 100644
--- a/gdk/quartz/gdkglcontext-quartz.c
+++ b/gdk/quartz/gdkglcontext-quartz.c
@@ -28,7 +28,7 @@
 #include "gdkquartzglcontext.h"
 #include "gdkquartzwindow.h"
 #include "gdkprivate-quartz.h"
-#include "gdkquartz-gtk-only.h"
+#include "gdkquartz-cocoa-access.h"
 
 #include "gdkinternals.h"
 
diff --git a/gdk/quartz/gdkinternal-quartz.h b/gdk/quartz/gdkinternal-quartz.h
index ec4a2c1c3b..271137171b 100644
--- a/gdk/quartz/gdkinternal-quartz.h
+++ b/gdk/quartz/gdkinternal-quartz.h
@@ -79,10 +79,14 @@ typedef enum {
 #define GDK_QUARTZ_EVENT_TABLET_PROXIMITY NSEventTypeTabletProximity
 #define GDK_QUARTZ_EVENT_SUBTYPE_TABLET_PROXIMITY NSEventSubtypeTabletProximity
 #define GDK_QUARTZ_EVENT_SUBTYPE_TABLET_POINT NSEventSubtypeTabletPoint
-#else
+#elif MAC_OS_X_VERSION_MIN_REQUIRED >= 10120
 #define GDK_QUARTZ_EVENT_TABLET_PROXIMITY NSTabletProximity
 #define GDK_QUARTZ_EVENT_SUBTYPE_TABLET_PROXIMITY NSTabletProximityEventSubtype
 #define GDK_QUARTZ_EVENT_SUBTYPE_TABLET_POINT NSTabletPointEventSubtype
+#else
+#define GDK_QUARTZ_EVENT_TABLET_PROXIMITY kEventTabletProximity
+#define GDK_QUARTZ_EVENT_SUBTYPE_TABLET_PROXIMITY NSTabletProximityEventSubtype
+#define GDK_QUARTZ_EVENT_SUBTYPE_TABLET_POINT kCGEventMouseSubtypeTabletPoint
 #endif
 
 void         _gdk_quartz_events_update_focus_window    (GdkWindow *new_window,
diff --git a/gdk/quartz/gdkquartz-cocoa-access.h b/gdk/quartz/gdkquartz-cocoa-access.h
new file mode 100644
index 0000000000..8c18dc1818
--- /dev/null
+++ b/gdk/quartz/gdkquartz-cocoa-access.h
@@ -0,0 +1,37 @@
+/* gdkquartz-gtk-only.h
+ *
+ * Copyright (C) 2005-2007 Imendio AB
+ *
+ * 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 __GDK_QUARTZ_COCOA_ACCESS_H__
+#define __GDK_QUARTZ_COCOA_ACCESS_H__
+
+#ifndef __OBJC__
+#error "This header declares Cocoa types and can be included only from source files compiled with 
Objective-C."
+#endif
+
+#include <AppKit/AppKit.h>
+#include <gdk/gdk.h>
+#include <gdk/quartz/gdkquartz.h>
+
+GDK_AVAILABLE_IN_ALL
+NSEvent  *gdk_quartz_event_get_nsevent              (GdkEvent  *event);
+GDK_AVAILABLE_IN_ALL
+NSWindow *gdk_quartz_window_get_nswindow            (GdkWindow *window);
+GDK_AVAILABLE_IN_ALL
+NSView   *gdk_quartz_window_get_nsview              (GdkWindow *window);
+
+#endif
diff --git a/gdk/quartz/gdkquartz-gtk-only.h b/gdk/quartz/gdkquartz-gtk-only.h
index 7f9857c829..d44fbda230 100644
--- a/gdk/quartz/gdkquartz-gtk-only.h
+++ b/gdk/quartz/gdkquartz-gtk-only.h
@@ -38,13 +38,5 @@ NSString *gdk_quartz_atom_to_pasteboard_type_libgtk_only        (GdkAtom
 /* Utilities */
 GDK_AVAILABLE_IN_ALL
 NSImage  *gdk_quartz_pixbuf_to_ns_image_libgtk_only (GdkPixbuf *pixbuf);
-GDK_AVAILABLE_IN_ALL
-NSEvent  *gdk_quartz_event_get_nsevent              (GdkEvent  *event);
-
-/* Window */
-GDK_AVAILABLE_IN_ALL
-NSWindow *gdk_quartz_window_get_nswindow            (GdkWindow *window);
-GDK_AVAILABLE_IN_ALL
-NSView   *gdk_quartz_window_get_nsview              (GdkWindow *window);
 
 #endif
diff --git a/gdk/quartz/gdkutils-quartz.c b/gdk/quartz/gdkutils-quartz.c
index 1edb94ad14..4f1b9c98d4 100644
--- a/gdk/quartz/gdkutils-quartz.c
+++ b/gdk/quartz/gdkutils-quartz.c
@@ -23,6 +23,7 @@
 #include <gdkinternals.h>
 
 #include "gdkquartz-gtk-only.h"
+#include "gdkquartz-cocoa-access.h"
 #include <gdkquartzutils.h>
 
 NSImage *
diff --git a/gdk/quartz/gdkwindow-quartz.c b/gdk/quartz/gdkwindow-quartz.c
index 62558d1527..5b454341df 100644
--- a/gdk/quartz/gdkwindow-quartz.c
+++ b/gdk/quartz/gdkwindow-quartz.c
@@ -30,7 +30,7 @@
 #include "gdkquartzglcontext.h"
 #include "gdkquartzscreen.h"
 #include "gdkquartzcursor.h"
-#include "gdkquartz-gtk-only.h"
+#include "gdkquartz-cocoa-access.h"
 
 #include <Carbon/Carbon.h>
 #include <AvailabilityMacros.h>
diff --git a/gdk/quartz/meson.build b/gdk/quartz/meson.build
index 1f137d18f8..70d688e1a7 100644
--- a/gdk/quartz/meson.build
+++ b/gdk/quartz/meson.build
@@ -26,6 +26,7 @@ gdk_quartz_sources = files(
 )
 
 gdk_quartz_public_headers = files(
+  'gdkquartz-cocoa-access.h',
   'gdkquartzcursor.h',
   'gdkquartzdevice-core.h',
   'gdkquartzdevicemanager-core.h',
diff --git a/gtk/gtkdnd-quartz.c b/gtk/gtkdnd-quartz.c
index 9356a69b8a..959e90d930 100644
--- a/gtk/gtkdnd-quartz.c
+++ b/gtk/gtkdnd-quartz.c
@@ -42,6 +42,7 @@
 #include "gtkintl.h"
 #include "gtkquartz.h"
 #include "gdk/quartz/gdkquartz.h"
+#include "gdk/quartz/gdkquartz-cocoa-access.h"
 #include "gdk/quartz/gdkquartz-gtk-only.h"
 #include "gdk/quartz/gdkquartzdnd.h"
 #include "gtkselectionprivate.h"
diff --git a/gtk/gtkfilechoosernativequartz.c b/gtk/gtkfilechoosernativequartz.c
index 680c7f1381..fb5abd5390 100644
--- a/gtk/gtkfilechoosernativequartz.c
+++ b/gtk/gtkfilechoosernativequartz.c
@@ -40,7 +40,7 @@
 #include "gtklabel.h"
 #include "gtkfilechooserentry.h"
 #include "gtkfilefilterprivate.h"
-#include <quartz/gdkquartz-gtk-only.h>
+#include <quartz/gdkquartz-cocoa-access.h>
 
 #if MAC_OS_X_VERSION_MAX_ALLOWED >= 1060
 typedef struct {
diff --git a/modules/input/imquartz.c b/modules/input/imquartz.c
index 9b9b733841..bdee6da2f4 100644
--- a/modules/input/imquartz.c
+++ b/modules/input/imquartz.c
@@ -30,7 +30,7 @@
 #define GTK_COMPILATION 1 // For gdkquartz-gtk-only.h
 
 #include "gdk/quartz/gdkinternal-quartz.h"
-#include "gdk/quartz/gdkquartz-gtk-only.h"
+#include "gdk/quartz/gdkquartz-cocoa-access.h"
 #include "gdk/quartz/GdkQuartzView.h"
 
 #define GTK_IM_CONTEXT_TYPE_QUARTZ (type_quartz)