Add meego-tablet-shell

We'll probably break it out into its own repo down the road, but for
now keeping it here is convenient.

compositor/Makefile.am

@@ -49,9 +49,22 @@ udevrulesddir = $(sysconfdir)/udev/rules.d
 dist_udevrulesd_DATA =				\
 	70-wayland.rules
 
+meego_tablet_shell_la_LTLIBRARIES = meego-tablet-shell.la
+meego_tablet_shell_la_LDFLAGS = -module -avoid-version
+meego_tablet_shell_ladir = @libdir@/wayland
+meego_tablet_shell_la_LIBADD = $(COMPOSITOR_LIBS)
+
+meego_tablet_shell_la_SOURCES =			\
+	meego-tablet-shell.c			\
+	meego-tablet-shell.h			\
+	meego-tablet-protocol.c			\
+	meego-tablet-server-protocol.h
+
 BUILT_SOURCES =					\
 	screenshooter-server-protocol.h		\
-	screenshooter-protocol.c
+	screenshooter-protocol.c		\
+	meego-tablet-protocol.c			\
+	meego-tablet-server-protocol.h
 
 CLEANFILES = $(BUILT_SOURCES)
 

compositor/meego-tablet-shell.c

@@ -0,0 +1,530 @@
+/*
+ * Copyright © 2011 Intel Corporation
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and
+ * its documentation for any purpose is hereby granted without fee, provided
+ * that the above copyright notice appear in all copies and that both that
+ * copyright notice and this permission notice appear in supporting
+ * documentation, and that the name of the copyright holders not be used in
+ * advertising or publicity pertaining to distribution of the software
+ * without specific, written prior permission.  The copyright holders make
+ * no representations about the suitability of this software for any
+ * purpose.  It is provided "as is" without express or implied warranty.
+ *
+ * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
+ * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
+ * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
+ * CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+ * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <sys/wait.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <fcntl.h>
+#include <linux/input.h>
+
+#include "compositor.h"
+#include "meego-tablet-server-protocol.h"
+
+/*
+ * TODO: Don't fade back from black until we've received a lockscreen
+ * attachment.
+ */
+
+struct meego_tablet_shell {
+	struct wl_object object;
+
+	struct wlsc_shell shell;
+
+	struct wlsc_compositor *compositor;
+	struct wl_event_source *sigchld_source;
+	pid_t pid;
+	struct wlsc_input_device *device;
+	struct wl_client *client;
+	struct wlsc_animation animation;
+	struct wlsc_tweener scale;
+	int width, height;
+
+	struct wlsc_surface *surface;
+
+	struct wlsc_surface *lockscreen_surface;
+	struct wl_listener lockscreen_listener;
+
+	struct wlsc_surface *home_surface;
+
+	struct wlsc_surface *switcher_surface;
+	struct wl_listener switcher_listener;
+
+	/* FIXME: Need a state machine here. */
+	int starting, locked;
+	int home_active;
+	int task_switcher_active;
+	int long_press_active;
+	struct wl_event_source *long_press_source;
+};
+
+static int
+sigchld_handler(int signal_number, void *data)
+{
+	struct meego_tablet_shell *shell = data;
+	int status;
+
+	wait(&status);
+	shell->pid = 0;
+
+	fprintf(stderr, "meego-ux-daemon crashed, exit code %d\n", status);
+
+	return 1;
+}
+
+static void
+tablet_shell_frame(struct wlsc_animation *animation,
+		   struct wlsc_output *output, uint32_t msecs)
+{
+	struct meego_tablet_shell *shell =
+		container_of(animation,
+			     struct meego_tablet_shell, animation);
+	struct wlsc_surface *es = shell->surface;
+	float scale;
+
+	scale = shell->scale.current;
+	wlsc_tweener_update(&shell->scale, msecs);
+
+	if (wlsc_tweener_done(&shell->scale)) {
+		wl_list_remove(&animation->link);
+		shell->surface = NULL;
+		fprintf(stderr, "animation done\n");
+	}
+
+	es->width = scale * shell->width;
+	es->height = scale * shell->height;
+	es->x = (output->width - es->width) / 2;
+	es->y = (output->height - es->height) / 2;
+	wlsc_surface_update_matrix(es);
+	wlsc_surface_damage(es);
+}
+
+static void
+meego_tablet_shell_attach(struct wlsc_shell *base,
+			  struct wlsc_surface *surface)
+{
+	struct meego_tablet_shell *shell =
+		container_of(base, struct meego_tablet_shell, shell);
+	struct wlsc_compositor *ec = shell->compositor;
+	const char *visual;
+
+	if (surface == shell->lockscreen_surface) {
+		if (shell->starting) {
+			wlsc_compositor_fade(shell->compositor, 0.0);
+			wlsc_compositor_wake(shell->compositor);
+			wlsc_surface_damage(surface);
+			shell->starting = 0;
+		}
+	} else if (surface == shell->switcher_surface) {
+
+		if (surface->visual == &ec->compositor.argb_visual) {
+			visual = "argb";
+		} else if (surface->visual == &ec->compositor.premultiplied_argb_visual) {
+			visual = "premultiplied argb";
+		} else {
+			visual = "rgb";
+		}
+
+		fprintf(stderr, "switcher attach, size %dx%d, visual %s\n",
+			shell->switcher_surface->width,
+			shell->switcher_surface->height, visual);
+	} else if (surface == shell->home_surface) {
+		surface->x = 0;
+		surface->y = 0;
+		wlsc_surface_update_matrix(surface);
+	} else {
+		/* FIXME: Fullscreen everything else. */
+		fprintf(stderr, "attach from surface %p, client %p\n",
+			surface, surface->surface.client);
+		if (shell->surface == NULL) {
+			fprintf(stderr, "starting animation for surface %p\n",
+				surface);
+
+			shell->width = surface->width;
+			shell->height = surface->height;
+			wlsc_tweener_init(&shell->scale, 3.0, 0.3, 1.0);
+			shell->animation.frame = tablet_shell_frame;
+			wl_list_insert(ec->animation_list.prev,
+				       &shell->animation.link);
+			shell->surface = surface;
+		}
+	}
+}
+
+static void
+handle_lockscreen_surface_destroy(struct wl_listener *listener,
+				struct wl_surface *surface, uint32_t time)
+{
+	struct meego_tablet_shell *shell =
+		container_of(listener,
+			     struct meego_tablet_shell, lockscreen_listener);
+
+	shell->lockscreen_surface = NULL;
+	shell->locked = 0;
+}
+
+static void
+tablet_shell_set_lockscreen(struct wl_client *client,
+			    struct meego_tablet_shell *shell,
+			    struct wl_surface *surface)
+{
+	struct wlsc_surface *es = (struct wlsc_surface *) surface;
+	struct wlsc_input_device *device =
+		(struct wlsc_input_device *) shell->compositor->input_device;
+
+	fprintf(stderr, "set lock screen\n");
+	es->x = 0;
+	es->y = 0;
+	wlsc_surface_update_matrix(es);
+	wlsc_surface_activate(es, device, wlsc_compositor_get_time());
+	shell->lockscreen_surface = es;
+
+	shell->lockscreen_listener.func = handle_lockscreen_surface_destroy;
+	wl_list_insert(es->surface.destroy_listener_list.prev,
+		       &shell->lockscreen_listener.link);
+}
+
+static void
+handle_switcher_surface_destroy(struct wl_listener *listener,
+				struct wl_surface *surface, uint32_t time)
+{
+	struct meego_tablet_shell *shell =
+		container_of(listener,
+			     struct meego_tablet_shell, switcher_listener);
+
+	shell->switcher_surface = NULL;
+	shell->task_switcher_active = 0;
+}
+
+static void
+tablet_shell_set_switcher(struct wl_client *client,
+			  struct meego_tablet_shell *shell,
+			  struct wl_surface *surface)
+{
+	struct wlsc_input_device *device =
+		(struct wlsc_input_device *) shell->compositor->input_device;
+	struct wlsc_surface *es = (struct wlsc_surface *) surface;
+
+	/* FIXME: Switcher should be centered and the compositor
+	 * should do the tinting of the background.  With the cache
+	 * layer idea, we should be able to hit the framerate on the
+	 * fade/zoom in. */
+	shell->switcher_surface = es;
+	shell->switcher_surface->x = 0;
+	shell->switcher_surface->y = 0;
+	wlsc_surface_update_matrix(es);
+
+	wlsc_surface_activate(es, device, wlsc_compositor_get_time());
+
+	fprintf(stderr, "set switcher %p, size %dx%d\n",
+		es, es->width, es->height);
+
+	shell->switcher_listener.func = handle_switcher_surface_destroy;
+	wl_list_insert(es->surface.destroy_listener_list.prev,
+		       &shell->switcher_listener.link);
+}
+
+static void
+tablet_shell_set_homescreen(struct wl_client *client,
+			    struct meego_tablet_shell *shell,
+			    struct wl_surface *surface)
+{
+	struct wlsc_input_device *device =
+		(struct wlsc_input_device *) shell->compositor->input_device;
+
+	shell->home_surface = (struct wlsc_surface *) surface;
+	shell->home_surface->x = 0;
+	shell->home_surface->y = 0;
+	wlsc_surface_update_matrix(shell->home_surface);
+
+	wlsc_surface_activate(shell->home_surface, device,
+			      wlsc_compositor_get_time());
+	fprintf(stderr, "set home screen\n");
+}
+
+struct meego_tablet_client {
+	struct wl_resource resource;
+	struct meego_tablet_shell *shell;
+	struct wl_client *client;
+	char *name;
+};
+
+static void
+destroy_tablet_client(struct wl_resource *resource, struct wl_client *client)
+{
+	struct meego_tablet_client *tablet_client =
+		container_of(resource, struct meego_tablet_client, resource);
+
+	free(tablet_client->name);
+	free(tablet_client);
+}
+
+static void
+tablet_client_poke(struct wl_client *client,
+		   struct meego_tablet_client *tablet_client)
+{
+	struct wlsc_compositor *compositor = tablet_client->shell->compositor;
+	struct wlsc_surface *surface;
+	struct wlsc_input_device *device =
+		(struct wlsc_input_device *) compositor->input_device;
+
+	wl_list_for_each(surface, &compositor->surface_list, link) {
+		if (surface->surface.client == tablet_client->client) {
+			wlsc_surface_activate(surface, device,
+					      wlsc_compositor_get_time());
+			break;
+		}
+	}
+
+	fprintf(stderr, "poke client %s\n", tablet_client->name);
+}
+
+static const struct meego_tablet_client_interface tablet_client_interface = {
+	tablet_client_poke
+};
+
+static void
+tablet_shell_create_client(struct wl_client *client,
+			   struct meego_tablet_shell *shell,
+			   uint32_t id, const char *name, int fd)
+{
+	struct wlsc_compositor *compositor = shell->compositor;
+	struct meego_tablet_client *tablet_client;
+
+	tablet_client = malloc(sizeof *tablet_client);
+	if (tablet_client == NULL) {
+		wl_client_post_no_memory(client);
+		return;
+	}
+
+	tablet_client->client = wl_client_create(compositor->wl_display, fd);
+	tablet_client->shell = shell;
+	tablet_client->name = strdup(name);
+
+	tablet_client->resource.destroy = destroy_tablet_client;
+	tablet_client->resource.object.id = id;
+	tablet_client->resource.object.interface =
+		&meego_tablet_client_interface;
+	tablet_client->resource.object.implementation =
+		(void (**)(void)) &tablet_client_interface;
+
+	wl_client_add_resource(client, &tablet_client->resource);
+
+	fprintf(stderr, "created client %p, id %d, name %s, fd %d\n",
+		tablet_client->client, id, name, fd);
+}
+
+static const struct meego_tablet_shell_interface tablet_shell_interface = {
+	tablet_shell_set_lockscreen,
+	tablet_shell_set_switcher,
+	tablet_shell_set_homescreen,
+	tablet_shell_create_client
+};
+
+static void
+launch_switcher(struct meego_tablet_shell *shell)
+{
+	struct wlsc_compositor *compositor = shell->compositor;
+	char s[32];
+	int sv[2], flags;
+
+	if (socketpair(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC, 0, sv) < 0) {
+		fprintf(stderr, "socketpair failed\n");
+		return;
+	}
+
+	/* SOCK_CLOEXEC closes both ends, so we need to unset the flag
+	 * on the client fd. */
+	flags = fcntl(sv[1], F_GETFD);
+	if (flags != -1)
+		fcntl(sv[1], F_SETFD, flags & ~FD_CLOEXEC);
+
+	shell->pid = fork();
+	switch (shell->pid) {
+	case 0:
+		snprintf(s, sizeof s, "%d", sv[1]);
+		setenv("WAYLAND_SOCKET", s, 1);
+		setenv("EGL_PLATFORM", "wayland", 1);
+		setenv("QT_QPA_PLATFORM", "waylandgl", 1);
+		if (execl("/usr/libexec/meego-ux-daemon",
+			  "/usr/libexec/meego-ux-daemon", NULL) < 0)
+			fprintf(stderr, "exec failed: %m\n");
+		exit(-1);
+
+	default:
+		close(sv[1]);
+		shell->client =
+			wl_client_create(compositor->wl_display, sv[0]);
+		break;
+
+	case -1:
+		fprintf(stderr, "failed to fork\n");
+		break;
+	}
+}
+
+static void
+toggle_switcher(struct meego_tablet_shell *shell)
+{
+	struct wlsc_surface *surface = shell->switcher_surface;
+
+	if (surface) {
+		wl_client_post_event(shell->client, &shell->object,
+				     MEEGO_TABLET_SHELL_HIDE_SWITCHER);
+		printf("hide switcher\n");
+		/* cleanupTaskSwitcher(); */
+	} else {
+		shell->task_switcher_active = 1;
+		wl_client_post_event(shell->client, &shell->object,
+				     MEEGO_TABLET_SHELL_SHOW_SWITCHER);
+	}
+}
+
+static void
+meego_tablet_shell_lock(struct wlsc_shell *base)
+{
+	struct meego_tablet_shell *shell =
+		container_of(base, struct meego_tablet_shell, shell);
+
+	if (!shell->locked)
+		wl_client_post_event(shell->client, &shell->object,
+				     MEEGO_TABLET_SHELL_SHOW_LOCKSCREEN);
+	shell->locked = 1;
+}
+
+static void
+go_home(struct meego_tablet_shell *shell)
+{
+	struct wlsc_input_device *device =
+		(struct wlsc_input_device *) shell->compositor->input_device;
+
+	if (shell->task_switcher_active)
+		wl_client_post_event(shell->client, &shell->object,
+				     MEEGO_TABLET_SHELL_HIDE_SWITCHER);
+
+	wlsc_surface_activate(shell->home_surface, device,
+			      wlsc_compositor_get_time());
+	printf("go home\n");
+}
+
+static int
+long_press_handler(void *data)
+{
+	struct meego_tablet_shell *shell = data;
+
+	shell->long_press_active = 0;
+	toggle_switcher(shell);
+
+	return 1;
+}
+
+static void
+menu_key_binding(struct wl_input_device *device, uint32_t time,
+		 uint32_t key, uint32_t button, uint32_t state, void *data)
+{
+	struct meego_tablet_shell *shell = data;
+
+	if (shell->locked)
+		return;
+
+	if (state)
+		toggle_switcher(shell);
+}
+
+static void
+home_key_binding(struct wl_input_device *device, uint32_t time,
+		 uint32_t key, uint32_t button, uint32_t state, void *data)
+{
+	struct meego_tablet_shell *shell = data;
+
+	if (shell->locked)
+		return;
+
+	shell->device = (struct wlsc_input_device *) device;
+
+	if (state) {
+		wl_event_source_timer_update(shell->long_press_source, 500);
+		shell->long_press_active = 1;
+	} else if (shell->long_press_active) {
+		wl_event_source_timer_update(shell->long_press_source, 0);
+		shell->long_press_active = 0;
+
+		if (shell->home_active || shell->task_switcher_active)
+			toggle_switcher(shell);
+		else
+			go_home(shell);
+	}
+}
+
+static void
+tablet_shell_bind(struct wl_client *client,
+		  struct wl_object *object, uint32_t version)
+{
+	struct meego_tablet_shell *shell =
+		(struct meego_tablet_shell *) object;
+
+	wl_client_post_event(shell->client, &shell->object,
+			     MEEGO_TABLET_SHELL_SHOW_LOCKSCREEN);
+}
+
+void
+shell_init(struct wlsc_compositor *compositor);
+
+WL_EXPORT void
+shell_init(struct wlsc_compositor *compositor)
+{
+	struct meego_tablet_shell *shell;
+	struct wl_event_loop *loop;
+
+	shell = malloc(sizeof *shell);
+	if (shell == NULL)
+		return;
+
+	memset(shell, 0, sizeof *shell);
+	shell->compositor = compositor;
+	shell->locked = 1;
+
+	shell->object.interface = &meego_tablet_shell_interface;
+	shell->object.implementation =
+		(void (**)(void)) &tablet_shell_interface;
+	wl_display_add_object(compositor->wl_display, &shell->object);
+
+	/* FIXME: This will make the object available to all clients. */
+	wl_display_add_global(compositor->wl_display,
+			      &shell->object, tablet_shell_bind);
+
+	loop = wl_display_get_event_loop(compositor->wl_display);
+	shell->sigchld_source =
+		wl_event_loop_add_signal(loop, SIGCHLD,
+					 sigchld_handler, shell);
+
+	shell->long_press_source =
+		wl_event_loop_add_timer(loop, long_press_handler, shell);
+
+	wlsc_compositor_add_binding(compositor, KEY_SPACE, 0, MODIFIER_CTRL,
+				    home_key_binding, shell);
+	wlsc_compositor_add_binding(compositor, KEY_ENTER, 0, MODIFIER_CTRL,
+				    menu_key_binding, shell);
+
+	compositor->shell = &shell->shell;
+
+	shell->shell.lock = meego_tablet_shell_lock;
+	shell->shell.attach = meego_tablet_shell_attach;
+
+	launch_switcher(shell);
+
+	wlsc_tweener_init(&compositor->fade.tweener, 0.8, 1.0, 1.0);
+	shell->starting = 1;
+}

protocol/meego-tablet.xml

@@ -0,0 +1,31 @@
+<protocol name="meego_tablet">
+
+  <interface name="meego_tablet_shell" version="1">
+    <request name="set_lockscreen">
+      <arg name="surface" type="object" interface="wl_surface"/>
+    </request>
+
+    <request name="set_switcher">
+      <arg name="surface" type="object" interface="wl_surface"/>
+    </request>
+
+    <request name="set_homescreen">
+      <arg name="surface" type="object" interface="wl_surface"/>
+    </request>
+
+    <request name="create_client">
+      <arg name="id" type="new_id" interface="meego_tablet_client"/>
+      <arg name="name" type="string"/>
+      <arg name="fd" type="fd"/>
+    </request>
+
+    <event name="show_lockscreen"/>
+    <event name="show_switcher"/>
+    <event name="hide_switcher"/>
+  </interface>
+
+  <interface name="meego_tablet_client" version="1">
+    <request name="poke"/>
+  </interface>
+
+</protocol>