libweston-desktop: implement the new xdg_shell (stable) protocol

Some clients like the mpv video player now request the xdg_shell
protocol so these will fail if the compositor only provides the
xdg_shell_unstable_v6 protocol. Compositors like mir and gnome provide
both protocols.

The two protocols are very similar therefore the code in xdg-shell-v6.c
has been refactored to work with the new xdg_shell protocol and now
resides in xdg-shell.c.

Pekka:
- split the patch
- fix continued line alignment

Daniel
- allow anchor_rect to initially have zero dimensions
- account for get_popup allowing NULL parent surface

Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.com>
Signed-off-by: Daniel Stone <daniels@collabora.com>

Makefile.am

@@ -132,15 +132,19 @@ libweston_desktop_@LIBWESTON_MAJOR@_la_SOURCES =	\
 	libweston-desktop/surface.c			\
 	libweston-desktop/wl-shell.c			\
 	libweston-desktop/xdg-shell-v6.c		\
+	libweston-desktop/xdg-shell.c			\
 	libweston-desktop/xwayland.c
 
 nodist_libweston_desktop_@LIBWESTON_MAJOR@_la_SOURCES =		\
 	protocol/xdg-shell-unstable-v6-protocol.c		\
-	protocol/xdg-shell-unstable-v6-server-protocol.h
+	protocol/xdg-shell-unstable-v6-server-protocol.h	\
+	protocol/xdg-shell-protocol.c				\
+	protocol/xdg-shell-server-protocol.h
 
 BUILT_SOURCES += $(nodist_libweston_desktop_@LIBWESTON_MAJOR@_la_SOURCES)
 
 libweston-desktop-@LIBWESTON_MAJOR@.la libweston-desktop/libweston_desktop_@LIBWESTON_MAJOR@_la-xdg-shell-v6.lo: protocol/xdg-shell-unstable-v6-server-protocol.h
+libweston-desktop-@LIBWESTON_MAJOR@.la libweston-desktop/libweston_desktop_@LIBWESTON_MAJOR@_la-xdg-wm-shell.lo: protocol/xdg-shell-server-protocol.h
 
 if SYSTEMD_NOTIFY_SUPPORT
 module_LTLIBRARIES += systemd-notify.la

libweston-desktop/internal.h

@@ -227,11 +227,15 @@ void
 weston_desktop_destroy_request(struct wl_client *client,
 			       struct wl_resource *resource);
 struct wl_global *
+weston_desktop_xdg_wm_base_create(struct weston_desktop *desktop,
+				  struct wl_display *display);
+struct wl_global *
 weston_desktop_xdg_shell_v6_create(struct weston_desktop *desktop,
 				   struct wl_display *display);
 struct wl_global *
 weston_desktop_wl_shell_create(struct weston_desktop *desktop,
 			       struct wl_display *display);
+
 void
 weston_desktop_xwayland_init(struct weston_desktop *desktop);
 

libweston-desktop/libweston-desktop.c

@@ -40,7 +40,8 @@ struct weston_desktop {
 	struct weston_compositor *compositor;
 	struct weston_desktop_api api;
 	void *user_data;
-	struct wl_global *xdg_shell_v6;
+	struct wl_global *xdg_wm_base;	 /* Stable protocol xdg_shell replaces xdg_shell_unstable_v6 */
+	struct wl_global *xdg_shell_v6;  /* Unstable xdg_shell_unstable_v6 protocol. */
 	struct wl_global *wl_shell;
 };
 
@@ -69,6 +70,13 @@ weston_desktop_create(struct weston_compositor *compositor,
 		MIN(sizeof(struct weston_desktop_api), api->struct_size);
 	memcpy(&desktop->api, api, desktop->api.struct_size);
 
+	desktop->xdg_wm_base =
+		weston_desktop_xdg_wm_base_create(desktop, display);
+	if (desktop->xdg_wm_base == NULL) {
+		weston_desktop_destroy(desktop);
+		return NULL;
+	}
+
 	desktop->xdg_shell_v6 =
 		weston_desktop_xdg_shell_v6_create(desktop, display);
 	if (desktop->xdg_shell_v6 == NULL) {
@@ -98,6 +106,8 @@ weston_desktop_destroy(struct weston_desktop *desktop)
 		wl_global_destroy(desktop->wl_shell);
 	if (desktop->xdg_shell_v6 != NULL)
 		wl_global_destroy(desktop->xdg_shell_v6);
+	if (desktop->xdg_wm_base != NULL)
+		wl_global_destroy(desktop->xdg_wm_base);
 
 	free(desktop);
 }

libweston-desktop/meson.build

@@ -5,9 +5,12 @@ srcs_libdesktop = [
 	'surface.c',
 	'xwayland.c',
 	'wl-shell.c',
+	'xdg-shell.c',
 	'xdg-shell-v6.c',
 	xdg_shell_unstable_v6_server_protocol_h,
 	xdg_shell_unstable_v6_protocol_c,
+	xdg_shell_server_protocol_h,
+	xdg_shell_protocol_c,
 ]
 lib_desktop = shared_library(
 	'weston-desktop-@0@'.format(libweston_major),

protocol/meson.build

@@ -36,6 +36,7 @@ generated_protocols = [
 	[ 'weston-touch-calibration', 'internal' ],
 	[ 'xdg-output', 'v1' ],
 	[ 'xdg-shell', 'v6' ],
+	[ 'xdg-shell', 'stable' ],
 ]
 
 foreach proto: generated_protocols