ivi-shell: add the shell plugin for In-Vehicle Infotainment system

- ivi-shell.so
- introduces ivi-shell/ivi-shell.[ch]

In-Vehicle Infotainment system traditionally manages surfaces with
global identification. A protocol, ivi_application, supports such a
feature by implementing a request, ivi_application::surface_creation
defined in ivi_application.xml.

The ivi-shell explicitly loads ivi-layout.so and a module to add
business logic like how to layout surfaces by using ivi-layout APIs.

Signed-off-by: Nobuhiko Tanibata <NOBUHIKO_TANIBATA@xddp.denso.co.jp>
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>

1 files changed, 468 insertions, 0 deletions

diff --git a/ivi-shell/ivi-shell.c b/ivi-shell/ivi-shell.c
new file mode 100644
index 00000000..50894fb9
--- /dev/null
+++ b/ivi-shell/ivi-shell.c
@@ -0,0 +1,468 @@
+/*
+ * Copyright (C) 2013 DENSO 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.
+ */
+
+/*
+ * ivi-shell supports a type of shell for In-Vehicle Infotainment system.
+ * In-Vehicle Infotainment system traditionally manages surfaces with global
+ * identification. A protocol, ivi_application, supports such a feature
+ * by implementing a request, ivi_application::surface_creation defined in
+ * ivi_application.xml.
+ *
+ *  The ivi-shell explicitly loads a module to add business logic like how to
+ *  layout surfaces by using internal ivi-layout APIs.
+ */
+#include "config.h"
+
+#include <sys/wait.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <linux/input.h>
+#include <dlfcn.h>
+#include <limits.h>
+#include <assert.h>
+
+#include "ivi-shell.h"
+#include "ivi-application-server-protocol.h"
+#include "ivi-layout-private.h"
+
+#include "../shared/os-compatibility.h"
+
+/* Representation of ivi_surface protocol object. */
+struct ivi_shell_surface
+{
+	struct wl_resource* resource;
+	struct ivi_shell *shell;
+	struct ivi_layout_surface *layout_surface;
+
+	struct weston_surface *surface;
+	struct wl_listener surface_destroy_listener;
+
+	uint32_t id_surface;
+
+	int32_t width;
+	int32_t height;
+
+	struct wl_list link;
+
+	struct wl_listener configured_listener;
+};
+
+struct ivi_shell_setting
+{
+	char *ivi_module;
+};
+
+/*
+ * Implementation of ivi_surface
+ */
+
+static void
+surface_configure_notify(struct wl_listener *listener, void *data)
+{
+	struct ivi_layout_surface *layout_surf =
+		(struct ivi_layout_surface *)data;
+
+	struct ivi_shell_surface *shell_surf =
+		container_of(listener,
+			     struct ivi_shell_surface,
+			     configured_listener);
+
+	int32_t dest_width = 0;
+	int32_t dest_height = 0;
+	shell_surf->shell->ivi_layout->get_surface_dimension(layout_surf,
+					  &dest_width, &dest_height);
+
+	if (shell_surf->resource)
+		ivi_surface_send_configure(shell_surf->resource,
+					   dest_width, dest_height);
+}
+
+static void
+ivi_shell_surface_configure(struct weston_surface *, int32_t, int32_t);
+
+static struct ivi_shell_surface *
+get_ivi_shell_surface(struct weston_surface *surface)
+{
+	if (surface->configure == ivi_shell_surface_configure)
+		return surface->configure_private;
+
+	return NULL;
+}
+
+static void
+ivi_shell_surface_configure(struct weston_surface *surface,
+			    int32_t sx, int32_t sy)
+{
+	struct ivi_shell_surface *ivisurf = get_ivi_shell_surface(surface);
+	struct weston_view *view;
+	float from_x;
+	float from_y;
+	float to_x;
+	float to_y;
+
+	if (surface->width == 0 || surface->height == 0 || ivisurf == NULL)
+		return;
+
+	view = ivisurf->shell->ivi_layout->get_weston_view(ivisurf->layout_surface);
+	if (view == NULL)
+		return;
+
+	if (ivisurf->width != surface->width ||
+	    ivisurf->height != surface->height) {
+		ivisurf->width  = surface->width;
+		ivisurf->height = surface->height;
+
+		weston_view_to_global_float(view, 0, 0, &from_x, &from_y);
+		weston_view_to_global_float(view, sx, sy, &to_x, &to_y);
+
+		weston_view_set_position(view,
+					 view->geometry.x + to_x - from_x,
+					 view->geometry.y + to_y - from_y);
+		weston_view_update_transform(view);
+
+		ivisurf->shell->ivi_layout->surface_configure(ivisurf->layout_surface,
+					      surface->width, surface->height);
+	}
+}
+
+/*
+ * The ivi_surface wl_resource destructor.
+ *
+ * Gets called via ivi_surface.destroy request or automatic wl_client clean-up.
+ */
+static void
+shell_destroy_shell_surface(struct wl_resource *resource)
+{
+	struct ivi_shell_surface *ivisurf = wl_resource_get_user_data(resource);
+	if (ivisurf != NULL) {
+		ivisurf->resource = NULL;
+	}
+}
+
+/* Gets called through the weston_surface destroy signal. */
+static void
+shell_handle_surface_destroy(struct wl_listener *listener, void *data)
+{
+	struct ivi_shell_surface *ivisurf =
+			container_of(listener, struct ivi_shell_surface,
+				     surface_destroy_listener);
+
+	assert(ivisurf != NULL);
+
+	if (ivisurf->surface!=NULL) {
+		ivisurf->surface->configure = NULL;
+		ivisurf->surface->configure_private = NULL;
+		ivisurf->surface = NULL;
+	}
+
+	wl_list_remove(&ivisurf->surface_destroy_listener.link);
+	wl_list_remove(&ivisurf->link);
+
+	if (ivisurf->resource != NULL) {
+		wl_resource_set_user_data(ivisurf->resource, NULL);
+		ivisurf->resource = NULL;
+	}
+	free(ivisurf);
+
+}
+
+/* Gets called, when a client sends ivi_surface.destroy request. */
+static void
+surface_destroy(struct wl_client *client, struct wl_resource *resource)
+{
+	/*
+	 * Fires the wl_resource destroy signal, and then calls
+	 * ivi_surface wl_resource destructor: shell_destroy_shell_surface()
+	 */
+	wl_resource_destroy(resource);
+}
+
+static const struct ivi_surface_interface surface_implementation = {
+	surface_destroy,
+};
+
+/**
+ * Request handler for ivi_application.surface_create.
+ *
+ * Creates an ivi_surface protocol object associated with the given wl_surface.
+ * ivi_surface protocol object is represented by struct ivi_shell_surface.
+ *
+ * \param client The client.
+ * \param resource The ivi_application protocol object.
+ * \param id_surface The IVI surface ID.
+ * \param surface_resource The wl_surface protocol object.
+ * \param id The protocol object id for the new ivi_surface protocol object.
+ *
+ * The wl_surface is given the ivi_surface role and associated with a unique
+ * IVI ID which is used to identify the surface in a controller
+ * (window manager).
+ */
+static void
+application_surface_create(struct wl_client *client,
+			   struct wl_resource *resource,
+			   uint32_t id_surface,
+			   struct wl_resource *surface_resource,
+			   uint32_t id)
+{
+	struct ivi_shell *shell = wl_resource_get_user_data(resource);
+	struct ivi_shell_surface *ivisurf;
+	struct ivi_layout_surface *layout_surface;
+	struct weston_surface *weston_surface =
+		wl_resource_get_user_data(surface_resource);
+	struct wl_resource *res;
+
+	if (weston_surface_set_role(weston_surface, "ivi_surface",
+				    resource, IVI_APPLICATION_ERROR_ROLE) < 0)
+		return;
+
+	layout_surface = shell->ivi_layout->surface_create(weston_surface,
+						    id_surface);
+
+	/* check if id_ivi is already used for wl_surface*/
+	if (layout_surface == NULL){
+		wl_resource_post_error(resource,
+				       IVI_APPLICATION_ERROR_IVI_ID,
+				       "surface_id is already assigned "
+				       "by another app");
+		return;
+	}
+
+	ivisurf = zalloc(sizeof *ivisurf);
+	if (ivisurf == NULL) {
+		wl_resource_post_no_memory(resource);
+		return;
+	}
+
+	wl_list_init(&ivisurf->link);
+	wl_list_insert(&shell->ivi_surface_list, &ivisurf->link);
+
+	ivisurf->shell = shell;
+	ivisurf->id_surface = id_surface;
+
+	ivisurf->width = 0;
+	ivisurf->height = 0;
+	ivisurf->layout_surface = layout_surface;
+	ivisurf->configured_listener.notify = surface_configure_notify;
+	ivisurf->shell->ivi_layout->add_surface_configured_listener(layout_surface,
+						&ivisurf->configured_listener);
+
+	/*
+	 * The following code relies on wl_surface destruction triggering
+	 * immediateweston_surface destruction
+	 */
+	ivisurf->surface_destroy_listener.notify = shell_handle_surface_destroy;
+	wl_signal_add(&weston_surface->destroy_signal,
+		      &ivisurf->surface_destroy_listener);
+
+	ivisurf->surface = weston_surface;
+
+	weston_surface->configure = ivi_shell_surface_configure;
+	weston_surface->configure_private = ivisurf;
+
+	res = wl_resource_create(client, &ivi_surface_interface, 1, id);
+	if (res == NULL) {
+		wl_client_post_no_memory(client);
+		return;
+	}
+
+	ivisurf->resource = res;
+
+	wl_resource_set_implementation(res, &surface_implementation,
+				       ivisurf, shell_destroy_shell_surface);
+}
+
+static const struct ivi_application_interface application_implementation = {
+	application_surface_create
+};
+
+/*
+ * Handle wl_registry.bind of ivi_application global singleton.
+ */
+static void
+bind_ivi_application(struct wl_client *client,
+		     void *data, uint32_t version, uint32_t id)
+{
+	struct ivi_shell *shell = data;
+	struct wl_resource *resource;
+
+	resource = wl_resource_create(client, &ivi_application_interface,
+				      1, id);
+
+	wl_resource_set_implementation(resource,
+				       &application_implementation,
+				       shell, NULL);
+}
+
+/*
+ * Called through the compositor's destroy signal.
+ */
+static void
+shell_destroy(struct wl_listener *listener, void *data)
+{
+	struct ivi_shell *shell =
+		container_of(listener, struct ivi_shell, destroy_listener);
+	struct ivi_shell_surface *ivisurf, *next;
+
+	wl_list_for_each_safe(ivisurf, next, &shell->ivi_surface_list, link) {
+		wl_list_remove(&ivisurf->link);
+		free(ivisurf);
+	}
+
+	free(shell);
+}
+
+static void
+init_ivi_shell(struct weston_compositor *compositor, struct ivi_shell *shell)
+{
+	shell->compositor = compositor;
+
+	wl_list_init(&shell->ivi_surface_list);
+
+}
+
+static int
+ivi_shell_setting_create(struct ivi_shell_setting *dest,
+			 struct weston_compositor *compositor)
+{
+	int result = 0;
+	struct weston_config *config = compositor->config;
+	struct weston_config_section *section;
+
+	if (NULL == dest)
+		return -1;
+
+	section = weston_config_get_section(config, "ivi-shell", NULL, NULL);
+
+	if (weston_config_section_get_string(
+		section, "ivi-module", &dest->ivi_module, NULL) != 0)
+	{
+		result = -1;
+	}
+
+	return result;
+}
+
+/*
+ * Initialization of ivi-shell.
+ */
+static int
+ivi_load_modules(struct weston_compositor *compositor, const char *modules,
+		 int *argc, char *argv[])
+{
+	const char *p, *end;
+	char buffer[256];
+	int (*module_init)(struct weston_compositor *compositor,
+			   int *argc, char *argv[]);
+
+	if (modules == NULL)
+		return 0;
+
+	p = modules;
+	while (*p) {
+		end = strchrnul(p, ',');
+		snprintf(buffer, sizeof buffer, "%.*s", (int)(end - p), p);
+
+		module_init = weston_load_module(buffer, "module_init");
+		if (module_init)
+			module_init(compositor, argc, argv);
+
+		p = end;
+		while (*p == ',')
+			p++;
+	}
+
+	return 0;
+}
+
+WL_EXPORT int
+module_init(struct weston_compositor *compositor,
+	    int *argc, char *argv[])
+{
+	struct ivi_shell *shell;
+	char ivi_layout_path[PATH_MAX];
+	void *module;
+	struct ivi_shell_setting setting = { };
+
+	shell = zalloc(sizeof *shell);
+	if (shell == NULL)
+		return -1;
+
+	init_ivi_shell(compositor, shell);
+
+	shell->destroy_listener.notify = shell_destroy;
+	wl_signal_add(&compositor->destroy_signal, &shell->destroy_listener);
+
+
+	if (wl_global_create(compositor->wl_display,
+			     &ivi_application_interface, 1,
+			     shell, bind_ivi_application) == NULL)
+		return -1;
+
+	if (ivi_shell_setting_create(&setting, compositor) != 0)
+		return -1;
+
+	/*
+	 * load module:ivi-layout
+	 * ivi_layout_interface is referred by ivi-shell to use ivi-layout.
+	 * The reason why the following code is written newly without
+	 * using weston_load_module is it doesn't open library with
+	 * RTLD_GLOBAL option.
+	 */
+	snprintf(ivi_layout_path, sizeof ivi_layout_path,
+		 "%s/%s", MODULEDIR, "ivi-layout.so");
+	module = dlopen(ivi_layout_path, RTLD_NOW | RTLD_NOLOAD);
+	if (module) {
+		weston_log("ivi-shell: Module '%s' already loaded\n",
+			   ivi_layout_path);
+		dlclose(module);
+		return -1;
+	}
+
+	weston_log("ivi-shell: Loading module '%s'\n", ivi_layout_path);
+	module = dlopen(ivi_layout_path, RTLD_NOW | RTLD_GLOBAL);
+	if (!module) {
+		weston_log("ivi-shell: Failed to load module: %s\n", dlerror());
+		return -1;
+	}
+
+	shell->ivi_layout = dlsym(module,"ivi_layout_interface");
+	if (!shell->ivi_layout){
+		weston_log("ivi-shell: couldn't find ivi_layout_interface in '%s'\n", ivi_layout_path);
+		free(setting.ivi_module);
+		dlclose(module);
+		return -1;
+	}
+
+	shell->ivi_layout->init_with_compositor(compositor);
+
+	/* Call module_init of ivi-modules which are defined in weston.ini */
+	if (ivi_load_modules(compositor, setting.ivi_module, argc, argv) < 0) {
+		free(setting.ivi_module);
+		dlclose(module);
+		return -1;
+	}
+
+	free(setting.ivi_module);
+	return 0;
+}