wayland backend: switch to xdg shell

Closes #72 and #96.

backend/meson.build

@@ -31,4 +31,4 @@ endif
 
 lib_wlr_backend = static_library('wlr_backend', backend_files,
   include_directories: wlr_inc,
-  dependencies: [wayland_server, egl, gbm, libinput, systemd])
+  dependencies: [wayland_server, egl, gbm, libinput, systemd, wlr_protos])

backend/wayland/backend.c

@@ -10,6 +10,8 @@
 #include <wlr/interfaces/wlr_input_device.h>
 #include <wlr/util/log.h>
 #include "backend/wayland.h"
+#include "xdg-shell-unstable-v6-client-protocol.h"
+
 
 static int dispatch_events(int fd, uint32_t mask, void *data) {
 	struct wlr_wl_backend *backend = data;
@@ -89,7 +91,7 @@ static void wlr_wl_backend_destroy(struct wlr_backend *_backend) {
 	wlr_egl_free(&backend->egl);
 	if (backend->seat) wl_seat_destroy(backend->seat);
 	if (backend->shm) wl_shm_destroy(backend->shm);
-	if (backend->shell) wl_shell_destroy(backend->shell);
+	if (backend->shell) zxdg_shell_v6_destroy(backend->shell);
 	if (backend->compositor) wl_compositor_destroy(backend->compositor);
 	if (backend->registry) wl_registry_destroy(backend->registry);
 	if (backend->remote_display) wl_display_disconnect(backend->remote_display);

backend/wayland/output.c

@@ -11,6 +11,7 @@
 #include <wlr/interfaces/wlr_output.h>
 #include <wlr/util/log.h>
 #include "backend/wayland.h"
+#include "xdg-shell-unstable-v6-client-protocol.h"
 
 int os_create_anonymous_file(off_t size);
 
@@ -136,7 +137,7 @@ static void wlr_wl_output_destroy(struct wlr_output *_output) {
 	}
 	eglDestroySurface(output->backend->egl.display, output->surface);
 	wl_egl_window_destroy(output->egl_window);
-	wl_shell_surface_destroy(output->shell_surface);
+	// xdg_surface/toplevel destroy
 	wl_surface_destroy(output->surface);
 	free(output);
 }
@@ -162,16 +163,27 @@ static struct wlr_output_impl output_impl = {
 	.move_cursor = wlr_wl_output_move_cursor
 };
 
-void handle_ping(void *data, struct wl_shell_surface *ssurface, uint32_t serial) {
+static void xdg_surface_handle_configure(void *data, struct zxdg_surface_v6 *xdg_surface,
+		uint32_t serial) {
 	struct wlr_wl_backend_output *output = data;
-	assert(output && output->shell_surface == ssurface);
-	wl_shell_surface_pong(ssurface, serial);
+	assert(output && output->xdg_surface == xdg_surface);
+
+	zxdg_surface_v6_ack_configure(xdg_surface, serial);
+
+	// nothing else?
 }
 
-void handle_configure(void *data, struct wl_shell_surface *wl_shell_surface,
-		uint32_t edges, int32_t width, int32_t height){
+static struct zxdg_surface_v6_listener xdg_surface_listener = {
+	.configure = xdg_surface_handle_configure,
+};
+
+static void xdg_toplevel_handle_configure(void *data, struct zxdg_toplevel_v6 *xdg_toplevel,
+		int32_t width, int32_t height, struct wl_array *states) {
 	struct wlr_wl_backend_output *output = data;
-	assert(output && output->shell_surface == wl_shell_surface);
+	assert(output && output->xdg_toplevel == xdg_toplevel);
+
+	// loop over states for maximized etc?
+
 	wl_egl_window_resize(output->egl_window, width, height, 0, 0);
 	output->wlr_output.width = width;
 	output->wlr_output.height = height;
@@ -179,14 +191,16 @@ void handle_configure(void *data, struct wl_shell_surface *wl_shell_surface,
 	wl_signal_emit(&output->wlr_output.events.resolution, output);
 }
 
-void handle_popup_done(void *data, struct wl_shell_surface *wl_shell_surface) {
-	wlr_log(L_ERROR, "Unexpected wl_shell_surface.popup_done event");
+static void xdg_toplevel_handle_close(void *data, struct zxdg_toplevel_v6 *xdg_toplevel) {
+	struct wlr_wl_backend_output *output = data;
+        assert(output && output->xdg_toplevel == xdg_toplevel);
+
+	wl_display_terminate(output->backend->local_display);
 }
 
-static struct wl_shell_surface_listener shell_surface_listener = {
-	.ping = handle_ping,
-	.configure = handle_configure,
-	.popup_done = handle_popup_done
+static struct zxdg_toplevel_v6_listener xdg_toplevel_listener = {
+	.configure = xdg_toplevel_handle_configure,
+	.close = xdg_toplevel_handle_close,
 };
 
 struct wlr_output *wlr_wl_output_create(struct wlr_backend *_backend) {
@@ -218,14 +232,17 @@ struct wlr_output *wlr_wl_output_create(struct wlr_backend *_backend) {
 
 	// TODO: error handling
 	output->surface = wl_compositor_create_surface(backend->compositor);
-	output->shell_surface =
-		wl_shell_get_shell_surface(backend->shell, output->surface);
+	output->xdg_surface =
+		zxdg_shell_v6_get_xdg_surface(backend->shell, output->surface);
+	output->xdg_toplevel =
+		zxdg_surface_v6_get_toplevel(output->xdg_surface);
 
-	wl_shell_surface_set_class(output->shell_surface, "sway");
-	wl_shell_surface_set_title(output->shell_surface, "sway-wl");
-	wl_shell_surface_add_listener(output->shell_surface,
-			&shell_surface_listener, output);
-	wl_shell_surface_set_toplevel(output->shell_surface);
+	// class? app_id?
+	zxdg_toplevel_v6_set_title(output->xdg_toplevel, "sway-wl");
+	zxdg_surface_v6_add_listener(output->xdg_surface,
+			&xdg_surface_listener, output);
+	zxdg_toplevel_v6_add_listener(output->xdg_toplevel,
+			&xdg_toplevel_listener, output);
 
 	output->egl_window = wl_egl_window_create(output->surface,
 			wlr_output->width, wlr_output->height);

backend/wayland/registry.c

@@ -4,6 +4,18 @@
 #include <wayland-client.h>
 #include <wlr/util/log.h>
 #include "backend/wayland.h"
+#include "xdg-shell-unstable-v6-client-protocol.h"
+
+
+static void xdg_shell_handle_ping(void *data, struct zxdg_shell_v6 *shell,
+		uint32_t serial) {
+        zxdg_shell_v6_pong(shell, serial);
+}
+
+static const struct zxdg_shell_v6_listener xdg_shell_listener = {
+        xdg_shell_handle_ping,
+};
+
 
 static void registry_global(void *data, struct wl_registry *registry,
 		uint32_t name, const char *interface, uint32_t version) {
@@ -13,9 +25,10 @@ static void registry_global(void *data, struct wl_registry *registry,
 	if (strcmp(interface, wl_compositor_interface.name) == 0) {
 		backend->compositor = wl_registry_bind(registry, name,
 				&wl_compositor_interface, version);
-	} else if (strcmp(interface, wl_shell_interface.name) == 0) {
+	} else if (strcmp(interface, zxdg_shell_v6_interface.name) == 0) {
 		backend->shell = wl_registry_bind(registry, name,
-				&wl_shell_interface, version);
+				&zxdg_shell_v6_interface, version);
+		zxdg_shell_v6_add_listener(backend->shell, &xdg_shell_listener, NULL);
 	} else if (strcmp(interface, wl_shm_interface.name) == 0) {
 		backend->shm = wl_registry_bind(registry, name,
 				&wl_shm_interface, version);

include/backend/wayland.h

@@ -24,7 +24,7 @@ struct wlr_wl_backend {
 	struct wl_event_source *remote_display_src;
 	struct wl_registry *registry;
 	struct wl_compositor *compositor;
-	struct wl_shell *shell;
+	struct zxdg_shell_v6 *shell;
 	struct wl_shm *shm;
 	struct wl_seat *seat;
 	struct wl_pointer *pointer;
@@ -36,7 +36,8 @@ struct wlr_wl_backend_output {
 
 	struct wlr_wl_backend *backend;
 	struct wl_surface *surface;
-	struct wl_shell_surface *shell_surface;
+	struct zxdg_surface_v6 *xdg_surface;
+	struct zxdg_toplevel_v6 *xdg_toplevel;
 	struct wl_egl_window *egl_window;
 	struct wl_callback *frame_callback;
 

protocol/meson.build

@@ -10,10 +10,18 @@ wayland_scanner_code = generator(wayland_scanner,
   output: '@BASENAME@-protocol.c',
   arguments: ['code', '@INPUT@', '@OUTPUT@'])
 
+wayland_scanner_client = generator(wayland_scanner,
+  output: '@BASENAME@-client-protocol.h',
+  arguments: ['client-header', '@INPUT@', '@OUTPUT@'])
+
 protocols = [
   [ wl_protocol_dir, 'unstable/xdg-shell/xdg-shell-unstable-v6.xml' ]
 ]
 
+client_protocols = [
+  [ wl_protocol_dir, 'unstable/xdg-shell/xdg-shell-unstable-v6.xml' ]
+]
+
 wl_protos_src = []
 wl_protos_headers = []
 
@@ -23,6 +31,11 @@ foreach p : protocols
   wl_protos_headers += wayland_scanner_server.process(xml)
 endforeach
 
+foreach p : client_protocols
+  xml = join_paths(p)
+  wl_protos_headers += wayland_scanner_client.process(xml)
+endforeach
+
 lib_wl_protos = static_library('wl_protos', wl_protos_src + wl_protos_headers)
 wlr_protos = declare_dependency(
   link_with: lib_wl_protos,