1 files changed, 533 insertions, 0 deletions

diff --git a/src/shell.c b/src/shell.c
new file mode 100644
index 0000000..cac8fa2
--- /dev/null
+++ b/src/shell.c
@@ -0,0 +1,533 @@
+/*
+ * Copyright © 2019 Collabora, Ltd.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial
+ * portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT.  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include "ivi-compositor.h"
+
+#include <assert.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include <libweston-6/compositor.h>
+#include <libweston-6/config-parser.h>
+
+#include "shared/os-compatibility.h"
+
+#include "agl-shell-server-protocol.h"
+
+void
+ivi_set_desktop_surface(struct ivi_surface *surface)
+{
+	assert(surface->role == IVI_SURFACE_ROLE_NONE);
+
+	surface->role = IVI_SURFACE_ROLE_DESKTOP;
+	wl_list_insert(&surface->ivi->surfaces, &surface->link);
+}
+
+/* TODO: Replace this with some callback or similar, to have
+ * adjustable window management policy.
+ */
+void
+ivi_reflow_outputs(struct ivi_compositor *ivi)
+{
+	struct ivi_surface *surface;
+	struct ivi_output *output;
+	int i = 0;
+
+	if (wl_list_empty(&ivi->outputs))
+		return;
+
+	output = wl_container_of(ivi->outputs.next, output, link);
+
+	wl_list_for_each(surface, &ivi->surfaces, link) {
+		struct weston_desktop_surface *dsurface = surface->dsurface;
+
+		int32_t w = output->area.width / 4;
+		int32_t h = output->area.height / 2;
+		int32_t x = output->output->x + output->area.x + w * (i % 4);
+		int32_t y = output->output->y + output->area.y + h * (i / 4);
+
+		if (surface->old_geom.width == -1) {
+			weston_desktop_surface_set_size(dsurface, w, h);
+			continue;
+		} else {
+			ivi_layout_set_mapped(surface);
+			ivi_layout_set_position(surface, x, y, w, h);
+		}
+
+		if (++i == 8) {
+			if (output->link.next == &ivi->outputs)
+				break;
+
+			output = wl_container_of(output->link.next,
+					         output, link);
+			i = 0;
+		}
+	}
+
+	ivi_layout_commit(ivi);
+}
+
+void
+ivi_layout_set_mapped(struct ivi_surface *surface)
+{
+	surface->pending.flags |= IVI_SURFACE_PROP_MAP;
+}
+
+void
+ivi_layout_set_position(struct ivi_surface *surface,
+			int32_t x, int32_t y,
+			int32_t width, int32_t height)
+{
+	surface->pending.flags |= IVI_SURFACE_PROP_POSITION;
+	surface->pending.x = x;
+	surface->pending.y = y;
+	surface->pending.width = width;
+	surface->pending.height = height;
+}
+
+void
+ivi_layout_commit(struct ivi_compositor *ivi)
+{
+	struct ivi_surface *surface;
+
+	wl_list_for_each(surface, &ivi->surfaces, link) {
+		struct weston_desktop_surface *dsurface = surface->dsurface;
+		struct weston_surface *wsurface =
+			weston_desktop_surface_get_surface(dsurface);
+		struct weston_geometry geom;
+		struct weston_view *view;
+
+		/*
+		 * TODO: Hoist view into ivi_struct. It doesn't need ot be part
+		 * of the tagged union.
+		 */
+		switch (surface->role) {
+		case IVI_SURFACE_ROLE_DESKTOP:
+			view = surface->desktop.view;
+			break;
+		case IVI_SURFACE_ROLE_BACKGROUND:
+			view = surface->bg.view;
+			break;
+		case IVI_SURFACE_ROLE_PANEL:
+			view = surface->panel.view;
+			break;
+		default:
+			continue;
+		}
+
+		if (surface->pending.flags & IVI_SURFACE_PROP_MAP) {
+			view = weston_desktop_surface_create_view(dsurface);
+			wsurface->is_mapped = true;
+
+			surface->desktop.view = view;
+			weston_layer_entry_insert(&ivi->normal.view_list,
+						  &view->layer_link);
+			weston_view_update_transform(view);
+			weston_view_set_mask_infinite(view);
+			weston_view_schedule_repaint(view);
+		}
+
+		geom = weston_desktop_surface_get_geometry(dsurface);
+
+		if (surface->pending.flags & IVI_SURFACE_PROP_POSITION) {
+			weston_desktop_surface_set_size(dsurface,
+							surface->pending.width,
+							surface->pending.height);
+			weston_view_set_position(view,
+						 surface->pending.x - geom.x,
+						 surface->pending.y - geom.y);
+		}
+
+		surface->pending.flags = 0;
+	}
+}
+
+int
+ivi_shell_init(struct ivi_compositor *ivi)
+{
+	weston_layer_init(&ivi->background, ivi->compositor);
+	weston_layer_init(&ivi->normal, ivi->compositor);
+	weston_layer_init(&ivi->panel, ivi->compositor);
+	weston_layer_init(&ivi->fullscreen, ivi->compositor);
+
+	weston_layer_set_position(&ivi->background,
+				  WESTON_LAYER_POSITION_BACKGROUND);
+	weston_layer_set_position(&ivi->normal,
+				  WESTON_LAYER_POSITION_NORMAL);
+	weston_layer_set_position(&ivi->panel,
+				  WESTON_LAYER_POSITION_UI);
+	weston_layer_set_position(&ivi->fullscreen,
+				  WESTON_LAYER_POSITION_FULLSCREEN);
+
+	return 0;
+}
+
+static void
+client_exec(const char *command, int fd)
+{
+	sigset_t sig;
+	char s[32];
+
+	/* Don't give the child our signal mask */
+	sigfillset(&sig);
+	sigprocmask(SIG_UNBLOCK, &sig, NULL);
+
+	/* Launch clients as the user; don't give them the wrong euid */
+	if (seteuid(getuid()) == -1) {
+		weston_log("seteuid failed: %s\n", strerror(errno));
+		return;
+	}
+
+	/* Duplicate fd to unset the CLOEXEC flag. We don't need to worry about
+	 * clobbering fd, as we'll exit/exec either way.
+	 */
+	fd = dup(fd);
+	if (fd == -1) {
+		weston_log("dup failed: %s\n", strerror(errno));
+		return;
+	}
+
+	snprintf(s, sizeof s, "%d", fd);
+	setenv("WAYLAND_SOCKET", s, 1);
+
+	execl("/bin/sh", "/bin/sh", "-c", command, NULL);
+	weston_log("executing '%s' failed: %s", command, strerror(errno));
+}
+
+static struct wl_client *
+launch_shell_client(struct ivi_compositor *ivi, const char *command)
+{
+	struct wl_client *client;
+	int sock[2];
+	pid_t pid;
+
+	weston_log("launching' %s'\n", command);
+
+	if (os_socketpair_cloexec(AF_UNIX, SOCK_STREAM, 0, sock) < 0) {
+		weston_log("socketpair failed while launching '%s': %s\n",
+			   command, strerror(errno));
+		return NULL;
+	}
+
+	pid = fork();
+	if (pid == -1) {
+		close(sock[0]);
+		close(sock[1]);
+		weston_log("fork failed while launching '%s': %s\n",
+			   command, strerror(errno));
+		return NULL;
+	}
+
+	if (pid == 0) {
+		client_exec(command, sock[1]);
+		_Exit(EXIT_FAILURE);
+	}
+	close(sock[1]);
+
+	client = wl_client_create(ivi->compositor->wl_display, sock[0]);
+	if (!client) {
+		close(sock[0]);
+		weston_log("Failed to create wayland client for '%s'",
+			   command);
+		return NULL;
+	}
+
+	return client;
+}
+
+int
+ivi_launch_shell_client(struct ivi_compositor *ivi)
+{
+	struct weston_config_section *section;
+	char *command = NULL;
+
+	section = weston_config_get_section(ivi->config, "shell-client",
+					    NULL, NULL);
+	if (section)
+		weston_config_section_get_string(section, "command",
+						 &command, NULL);
+
+	if (!command)
+		return -1;
+
+	ivi->shell_client.client = launch_shell_client(ivi, command);
+	if (!ivi->shell_client.client)
+		return -1;
+
+	return 0;
+}
+
+static void
+shell_ready(struct wl_client *client, struct wl_resource *shell_res)
+{
+	struct ivi_compositor *ivi = wl_resource_get_user_data(shell_res);
+	struct ivi_output *output;
+	struct ivi_surface *surface, *tmp;
+
+	/* Init already finished. Do nothing */
+	if (ivi->shell_client.ready)
+		return;
+
+	ivi->shell_client.ready = true;
+	/* TODO: Create a black screen and remove it here */
+
+	wl_list_for_each(output, &ivi->outputs, link) {
+		struct weston_desktop_surface *dsurf;
+		struct weston_geometry geom;
+
+		output->area.x = 0;
+		output->area.y = 0;
+		output->area.width = output->output->width;
+		output->area.height = output->output->height;
+
+		if (output->top) {
+			dsurf = output->top->dsurface;
+			geom = weston_desktop_surface_get_geometry(dsurf);
+
+			output->area.y += geom.height;
+			output->area.height -= geom.height;
+		}
+		if (output->bottom) {
+			dsurf = output->bottom->dsurface;
+			geom = weston_desktop_surface_get_geometry(dsurf);
+
+			output->area.height -= geom.height;
+		}
+		if (output->left) {
+			dsurf = output->left->dsurface;
+			geom = weston_desktop_surface_get_geometry(dsurf);
+
+			output->area.x += geom.width;
+			output->area.width -= geom.width;
+		}
+		if (output->right) {
+			dsurf = output->right->dsurface;
+			geom = weston_desktop_surface_get_geometry(dsurf);
+
+			output->area.width -= geom.width;
+		}
+
+		weston_log("Usable area: %dx%d+%d,%d\n",
+			   output->area.width, output->area.height,
+			   output->area.x, output->area.y);
+	}
+
+	wl_list_for_each_safe(surface, tmp, &ivi->pending_surfaces, link) {
+		wl_list_remove(&surface->link);
+		ivi_set_desktop_surface(surface);
+	}
+}
+
+static void
+shell_set_background(struct wl_client *client,
+		     struct wl_resource *shell_res,
+		     struct wl_resource *surface_res,
+		     struct wl_resource *output_res)
+{
+	struct weston_head *head = weston_head_from_resource(output_res);
+	struct weston_output *woutput = weston_head_get_output(head);
+	struct ivi_output *output = to_ivi_output(woutput);
+	struct weston_surface *wsurface = wl_resource_get_user_data(surface_res);
+	struct weston_desktop_surface *dsurface;
+	struct ivi_surface *surface;
+
+	dsurface = weston_surface_get_desktop_surface(wsurface);
+	if (!dsurface) {
+		wl_resource_post_error(shell_res,
+				       AGL_SHELL_ERROR_INVALID_ARGUMENT,
+				       "surface must be a desktop surface");
+		return;
+	}
+
+	surface = weston_desktop_surface_get_user_data(dsurface);
+	if (surface->role != IVI_SURFACE_ROLE_NONE) {
+		wl_resource_post_error(shell_res,
+				       AGL_SHELL_ERROR_INVALID_ARGUMENT,
+				       "surface already has another ivi role");
+		return;
+	}
+
+	if (output->background) {
+		wl_resource_post_error(shell_res,
+				       AGL_SHELL_ERROR_BACKGROUND_EXISTS,
+				       "output already has background");
+		return;
+	}
+
+	surface->role = IVI_SURFACE_ROLE_BACKGROUND;
+	surface->bg.output = output;
+	wl_list_remove(&surface->link);
+	wl_list_init(&surface->link);
+
+	output->background = surface;
+
+	weston_desktop_surface_set_maximized(dsurface, true);
+	weston_desktop_surface_set_size(dsurface,
+					output->output->width,
+					output->output->height);
+}
+
+static void
+shell_set_panel(struct wl_client *client,
+		struct wl_resource *shell_res,
+		struct wl_resource *surface_res,
+		struct wl_resource *output_res,
+		uint32_t edge)
+{
+	struct weston_head *head = weston_head_from_resource(output_res);
+	struct weston_output *woutput = weston_head_get_output(head);
+	struct ivi_output *output = to_ivi_output(woutput);
+	struct weston_surface *wsurface = wl_resource_get_user_data(surface_res);
+	struct weston_desktop_surface *dsurface;
+	struct ivi_surface *surface;
+	struct ivi_surface **member;
+	int32_t width = 0, height = 0;
+
+	dsurface = weston_surface_get_desktop_surface(wsurface);
+	if (!dsurface) {
+		wl_resource_post_error(shell_res,
+				       AGL_SHELL_ERROR_INVALID_ARGUMENT,
+				       "surface must be a desktop surface");
+		return;
+	}
+
+	surface = weston_desktop_surface_get_user_data(dsurface);
+	if (surface->role != IVI_SURFACE_ROLE_NONE) {
+		wl_resource_post_error(shell_res,
+				       AGL_SHELL_ERROR_INVALID_ARGUMENT,
+				       "surface already has another ivi role");
+		return;
+	}
+
+	switch (edge) {
+	case AGL_SHELL_EDGE_TOP:
+		member = &output->top;
+		break;
+	case AGL_SHELL_EDGE_BOTTOM:
+		member = &output->bottom;
+		break;
+	case AGL_SHELL_EDGE_LEFT:
+		member = &output->left;
+		break;
+	case AGL_SHELL_EDGE_RIGHT:
+		member = &output->right;
+		break;
+	default:
+		wl_resource_post_error(shell_res,
+				       AGL_SHELL_ERROR_INVALID_ARGUMENT,
+				       "invalid edge for panel");
+		return;
+	}
+
+	if (*member) {
+		wl_resource_post_error(shell_res,
+				       AGL_SHELL_ERROR_BACKGROUND_EXISTS,
+				       "output already has panel on this edge");
+		return;
+	}
+
+	surface->role = IVI_SURFACE_ROLE_PANEL;
+	surface->panel.output = output;
+	surface->panel.edge = edge;
+	wl_list_remove(&surface->link);
+	wl_list_init(&surface->link);
+
+	*member = surface;
+
+	switch (surface->panel.edge) {
+	case AGL_SHELL_EDGE_TOP:
+	case AGL_SHELL_EDGE_BOTTOM:
+		width = woutput->width;
+		break;
+	case AGL_SHELL_EDGE_LEFT:
+	case AGL_SHELL_EDGE_RIGHT:
+		height = woutput->height;
+		break;
+	}
+
+	weston_desktop_surface_set_size(dsurface, width, height);
+}
+
+static const struct agl_shell_interface agl_shell_implementation = {
+	.ready = shell_ready,
+	.set_background = shell_set_background,
+	.set_panel = shell_set_panel,
+};
+
+static void
+unbind_agl_shell(struct wl_resource *resource)
+{
+}
+
+static void
+bind_agl_shell(struct wl_client *client,
+	       void *data, uint32_t version, uint32_t id)
+{
+	struct ivi_compositor *ivi = data;
+	struct wl_resource *resource;
+
+	resource = wl_resource_create(client, &agl_shell_interface,
+				      1, id);
+	if (!resource) {
+		wl_client_post_no_memory(client);
+		return;
+	}
+
+#if 0
+	if (ivi->shell_client.client != client) {
+		wl_resource_post_error(resource, WL_DISPLAY_ERROR_INVALID_OBJECT,
+				       "client not authorized to use agl_shell");
+		return;
+	}
+#endif
+
+	if (ivi->shell_client.resource) {
+		wl_resource_post_error(resource, WL_DISPLAY_ERROR_INVALID_OBJECT,
+				       "agl_shell has already been bound");
+		return;
+	}
+
+	wl_resource_set_implementation(resource, &agl_shell_implementation,
+				       ivi, unbind_agl_shell);
+	ivi->shell_client.resource = resource;
+}
+
+int
+ivi_shell_create_global(struct ivi_compositor *ivi)
+{
+	ivi->agl_shell = wl_global_create(ivi->compositor->wl_display,
+					  &agl_shell_interface, 1,
+					  ivi, bind_agl_shell);
+	if (!ivi->agl_shell) {
+		weston_log("Failed to create wayland global.\n");
+		return -1;
+	}
+
+	return 0;
+}