1 files changed, 568 insertions, 0 deletions

diff --git a/grpc-proxy/main-grpc.cpp b/grpc-proxy/main-grpc.cpp
new file mode 100644
index 0000000..a59c282
--- /dev/null
+++ b/grpc-proxy/main-grpc.cpp
@@ -0,0 +1,568 @@
+/*
+ * Copyright © 2022 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 <cstdio>
+#include <ctime>
+#include <algorithm>
+#include <queue>
+#include <thread>
+#include <mutex>
+#include <condition_variable>
+
+#include "shell.h"
+#include "log.h"
+#include "main-grpc.h"
+#include "grpc-async-cb.h"
+
+struct shell_data_init {
+	struct agl_shell *shell;
+	bool wait_for_bound;
+	bool bound_ok;
+	bool bound_fail;
+	int version;
+};
+
+static int running = 1;
+
+static void
+agl_shell_bound_ok_init(void *data, struct agl_shell *agl_shell)
+{
+	(void) agl_shell;
+
+	struct shell_data_init *sh = static_cast<struct shell_data_init *>(data);
+	sh->wait_for_bound = false;
+
+	sh->bound_ok = true;
+}
+
+static void
+agl_shell_bound_fail_init(void *data, struct agl_shell *agl_shell)
+{
+	(void) agl_shell;
+
+	struct shell_data_init *sh = static_cast<struct shell_data_init *>(data);
+	sh->wait_for_bound = false;
+
+	sh->bound_fail = true;
+}
+
+static void
+agl_shell_bound_ok(void *data, struct agl_shell *agl_shell)
+{
+	(void) agl_shell;
+
+	struct shell_data *sh = static_cast<struct shell_data *>(data);
+	sh->wait_for_bound = false;
+
+	sh->bound_ok = true;
+}
+
+static void
+agl_shell_bound_fail(void *data, struct agl_shell *agl_shell)
+{
+	(void) agl_shell;
+
+	struct shell_data *sh = static_cast<struct shell_data *>(data);
+	sh->wait_for_bound = false;
+
+	sh->bound_ok = false;
+}
+
+static void
+agl_shell_app_state(void *data, struct agl_shell *agl_shell,
+		const char *app_id, uint32_t state)
+{
+	(void) agl_shell;
+	struct shell_data *sh = static_cast<struct shell_data *>(data);
+	LOG("got app_state event app_id %s,  state %d\n", app_id, state);
+
+	if (sh->server_context_list.empty())
+		return;
+
+	::agl_shell_ipc::AppStateResponse app;
+
+	sh->current_app_state.set_app_id(std::string(app_id));
+	sh->current_app_state.set_state(state);
+
+	auto start = sh->server_context_list.begin();
+	while (start != sh->server_context_list.end()) {
+		// hold on if we're still detecting another in-flight writting
+		if (start->second->Writting()) {
+			LOG("skip writing to lister %p\n", static_cast<void *>(start->second));
+			continue;
+		}
+
+		LOG("writing to lister %p\n", static_cast<void *>(start->second));
+		start->second->NextWrite();
+		start++;
+	}
+}
+
+static const struct agl_shell_listener shell_listener = {
+        agl_shell_bound_ok,
+        agl_shell_bound_fail,
+        agl_shell_app_state,
+};
+
+static const struct agl_shell_listener shell_listener_init = {
+        agl_shell_bound_ok_init,
+        agl_shell_bound_fail_init,
+        nullptr,
+};
+
+static void
+agl_shell_ext_doas_done(void *data, struct agl_shell_ext *agl_shell_ext, uint32_t status)
+{
+	(void) agl_shell_ext;
+
+	struct shell_data *sh = static_cast<struct shell_data *>(data);
+	sh->wait_for_doas = false;
+
+	if (status == AGL_SHELL_EXT_DOAS_SHELL_CLIENT_STATUS_SUCCESS)
+		sh->doas_ok = true;
+}
+
+static const struct agl_shell_ext_listener shell_ext_listener = {
+        agl_shell_ext_doas_done,
+};
+
+static void
+display_handle_geometry(void *data, struct wl_output *wl_output,
+		int x, int y, int physical_width, int physical_height,
+		int subpixel, const char *make, const char *model, int transform)
+{
+	(void) data;
+	(void) wl_output;
+	(void) x;
+	(void) y;
+	(void) physical_width;
+	(void) physical_height;
+	(void) subpixel;
+	(void) make;
+	(void) model;
+	(void) transform;
+}
+
+static void
+display_handle_mode(void *data, struct wl_output *wl_output, uint32_t flags,
+		int width, int height, int refresh)
+{
+	(void) data;
+	(void) wl_output;
+	(void) flags;
+	(void) width;
+	(void) height;
+	(void) refresh;
+}
+
+static void
+display_handle_done(void *data, struct wl_output *wl_output)
+{
+	(void) data;
+	(void) wl_output;
+}
+
+static void
+display_handle_scale(void *data, struct wl_output *wl_output, int32_t factor)
+{
+	(void) data;
+	(void) wl_output;
+	(void) factor;
+}
+
+
+static void
+display_handle_name(void *data, struct wl_output *wl_output, const char *name)
+{
+	(void) wl_output;
+
+	struct window_output *woutput = static_cast<struct window_output *>(data);
+	woutput->name = strdup(name);
+}
+
+static void
+display_handle_description(void *data, struct wl_output *wl_output, const char *description)
+{
+	(void) data;
+	(void) wl_output;
+	(void) description;
+}
+
+static const struct wl_output_listener output_listener = {
+	display_handle_geometry,
+	display_handle_mode,
+	display_handle_done,
+	display_handle_scale,
+	display_handle_name,
+	display_handle_description,
+};
+
+static void
+display_add_output(struct shell_data *sh, struct wl_registry *reg,
+		   uint32_t id, uint32_t version)
+{
+	struct window_output *w_output;
+
+	w_output = new struct window_output;
+	w_output->shell_data = sh;
+
+	w_output->output =
+		static_cast<struct wl_output *>(wl_registry_bind(reg, id,
+				&wl_output_interface,
+				std::min(version, static_cast<uint32_t>(4))));
+
+	wl_list_insert(&sh->output_list, &w_output->link);
+	wl_output_add_listener(w_output->output, &output_listener, w_output);
+}
+
+static void
+destroy_output(struct window_output *w_output)
+{
+	free(w_output->name);
+	wl_list_remove(&w_output->link);
+	free(w_output);
+}
+
+static void
+global_add(void *data, struct wl_registry *reg, uint32_t id,
+		const char *interface, uint32_t version)
+{
+
+	struct shell_data *sh = static_cast<struct shell_data *>(data);
+
+	if (!sh)
+		return;
+
+	if (strcmp(interface, agl_shell_interface.name) == 0) {
+		// bind to at least v3 to get events
+		sh->shell =
+			static_cast<struct agl_shell *>(wl_registry_bind(reg, id,
+				&agl_shell_interface,
+				std::min(static_cast<uint32_t>(3), version)));
+		agl_shell_add_listener(sh->shell, &shell_listener, data);
+		sh->version = version;
+	} else if (strcmp(interface, "wl_output") == 0) {
+                display_add_output(sh, reg, id, version);
+        }
+}
+
+// the purpose of this _init is to make sure we're not the first shell client
+// running to allow the 'main' shell client take over.
+static void
+global_add_init(void *data, struct wl_registry *reg, uint32_t id,
+		const char *interface, uint32_t version)
+{
+
+	struct shell_data_init *sh = static_cast<struct shell_data_init *>(data);
+
+	if (!sh)
+		return;
+
+	if (strcmp(interface, agl_shell_interface.name) == 0) {
+		sh->shell =
+			static_cast<struct agl_shell *>(wl_registry_bind(reg, id,
+				&agl_shell_interface,
+				std::min(static_cast<uint32_t>(3), version)));
+		agl_shell_add_listener(sh->shell, &shell_listener_init, data);
+		sh->version = version;
+	}
+}
+
+static void
+global_remove(void *data, struct wl_registry *reg, uint32_t id)
+{
+	/* Don't care */
+	(void) data;
+	(void) reg;
+	(void) id;
+}
+
+static void
+global_add_ext(void *data, struct wl_registry *reg, uint32_t id,
+		const char *interface, uint32_t version)
+{
+	struct shell_data *sh = static_cast<struct shell_data *>(data);
+
+	if (!sh)
+		return;
+
+	if (strcmp(interface, agl_shell_ext_interface.name) == 0) {
+		sh->shell_ext =
+			static_cast<struct agl_shell_ext *>(wl_registry_bind(reg, id,
+				&agl_shell_ext_interface,
+				std::min(static_cast<uint32_t>(1), version)));
+		agl_shell_ext_add_listener(sh->shell_ext,
+					   &shell_ext_listener, data);
+	}
+}
+
+static const struct wl_registry_listener registry_ext_listener = {
+	global_add_ext,
+	global_remove,
+};
+
+static const struct wl_registry_listener registry_listener = {
+	global_add,
+	global_remove,
+};
+
+static const struct wl_registry_listener registry_listener_init = {
+	global_add_init,
+	global_remove,
+};
+
+static void
+register_shell_ext(struct wl_display *wl_display, struct shell_data *sh)
+{
+	struct wl_registry *registry;
+
+	registry = wl_display_get_registry(wl_display);
+
+	wl_registry_add_listener(registry, &registry_ext_listener, sh);
+
+	wl_display_roundtrip(wl_display);
+	wl_registry_destroy(registry);
+}
+
+static void
+register_shell(struct wl_display *wl_display, struct shell_data *sh)
+{
+	struct wl_registry *registry;
+
+	wl_list_init(&sh->output_list);
+
+	registry = wl_display_get_registry(wl_display);
+
+	wl_registry_add_listener(registry, &registry_listener, sh);
+
+	wl_display_roundtrip(wl_display);
+	wl_registry_destroy(registry);
+}
+
+static int
+__register_shell_init(void)
+{
+	int ret = 0;
+	struct wl_registry *registry;
+	struct wl_display *wl_display;
+
+	struct shell_data_init *sh = new struct shell_data_init;
+
+	wl_display = wl_display_connect(NULL);
+	registry = wl_display_get_registry(wl_display);
+	sh->wait_for_bound = true;
+	sh->bound_fail = false;
+	sh->bound_ok = false;
+
+	wl_registry_add_listener(registry, &registry_listener_init, sh);
+	wl_display_roundtrip(wl_display);
+
+	if (!sh->shell || sh->version < 3) {
+		ret = -1;
+		goto err;
+	}
+
+	while (ret !=- 1 && sh->wait_for_bound) {
+		ret = wl_display_dispatch(wl_display);
+
+		if (sh->wait_for_bound)
+			continue;
+	}
+
+	ret = sh->bound_fail;
+
+	agl_shell_destroy(sh->shell);
+	wl_display_flush(wl_display);
+err:
+	wl_registry_destroy(registry);
+	wl_display_disconnect(wl_display);
+	delete sh;
+	return ret;
+}
+
+// we expect this client to be up & running *after* the shell client has
+// already set-up panels/backgrounds.
+// this means the very first try to bind to agl_shell we wait for
+// 'bound_fail' event, which would tell us when it's ok to attempt to
+// bind agl_shell_ext, call doas request, then attempt to bind (one
+// more time) to agl_shell but this time wait for 'bound_ok' event.
+void
+register_shell_init(void)
+{
+	struct timespec ts = {};
+
+	clock_gettime(CLOCK_MONOTONIC, &ts);
+
+	ts.tv_sec = 0;
+	ts.tv_nsec = 250 * 1000 * 1000;	// 250 ms
+
+	// verify if 'bound_fail' was received
+	while (true) {
+
+		int r = __register_shell_init();
+
+		if (r < 0) {
+			LOG("agl-shell extension not found or version too low\n");
+			exit(EXIT_FAILURE);
+		} else if (r == 1) {
+			// we need to get a 'bound_fail' event, if we get a 'bound_ok'
+			// it means we're the first shell to start so wait until the
+			// shell client actually started
+			LOG("Found another shell client running. "
+			     "Going further to bind to the agl_shell_ext interface\n");
+			break;
+		}
+
+		LOG("No shell client detected running. Will wait until one starts up...\n");
+		nanosleep(&ts, NULL);
+	}
+
+}
+
+static void
+destroy_shell_data(struct shell_data *sh)
+{
+        struct window_output *w_output, *w_output_next;
+
+        wl_list_for_each_safe(w_output, w_output_next, &sh->output_list, link)
+                destroy_output(w_output);
+
+        wl_display_flush(sh->wl_display);
+        wl_display_disconnect(sh->wl_display);
+
+	delete sh;
+}
+
+static struct shell_data *
+start_agl_shell_client(void)
+{
+	int ret = 0;
+	struct wl_display *wl_display;
+
+	wl_display = wl_display_connect(NULL);
+
+	struct shell_data *sh = new struct shell_data;
+
+	sh->wl_display = wl_display;
+	sh->wait_for_doas = true;
+	sh->wait_for_bound = true;
+
+	register_shell_ext(wl_display, sh);
+
+	// check for agl_shell_ext
+	if (!sh->shell_ext) {
+		LOG("Failed to bind to agl_shell_ext interface\n");
+		goto err;
+	}
+
+	if (wl_list_empty(&sh->output_list)) {
+		LOG("Failed get any outputs!\n");
+		goto err;
+	}
+
+	agl_shell_ext_doas_shell_client(sh->shell_ext);
+	while (ret != -1 && sh->wait_for_doas) {
+		ret = wl_display_dispatch(sh->wl_display);
+		if (sh->wait_for_doas)
+			continue;
+	}
+
+	if (!sh->doas_ok) {
+		LOG("Failed to get doas_done event\n");
+		goto err;
+	}
+
+	// bind to agl-shell
+	register_shell(wl_display, sh);
+	while (ret != -1 && sh->wait_for_bound) {
+		ret = wl_display_dispatch(sh->wl_display);
+		if (sh->wait_for_bound)
+			continue;
+	}
+
+	// at this point, we can't do anything about it
+	if (!sh->bound_ok) {
+		LOG("Failed to get bound_ok event!\n");
+		goto err;
+	}
+
+	LOG("agl_shell/agl_shell_ext interface OK\n");
+
+	return sh;
+err:
+	delete sh;
+	return nullptr;
+}
+
+static void
+start_grpc_server(Shell *aglShell)
+{
+	// instantiante the grpc server
+	std::string server_address(kDefaultGrpcServiceAddress);
+	GrpcServiceImpl service{aglShell};
+
+	grpc::EnableDefaultHealthCheckService(true);
+	grpc::reflection::InitProtoReflectionServerBuilderPlugin();
+
+	grpc::ServerBuilder builder;
+	builder.AddListeningPort(server_address, grpc::InsecureServerCredentials());
+	builder.RegisterService(&service);
+
+	std::unique_ptr<grpc::Server> server(builder.BuildAndStart());
+	LOG("gRPC server listening on %s\n", server_address.c_str());
+
+	server->Wait();
+}
+
+int main(int argc, char **argv)
+{
+	(void) argc;
+	(void) argv;
+	Shell *aglShell;
+	int ret = 0;
+
+	// this blocks until we detect that another shell client started
+	// running
+	register_shell_init();
+
+	struct shell_data *sh = start_agl_shell_client();
+	if (!sh) {
+		LOG("Failed to initialize agl-shell/agl-shell-ext\n");
+		exit(EXIT_FAILURE);
+	}
+
+	std::shared_ptr<struct agl_shell> agl_shell{sh->shell, agl_shell_destroy};
+	aglShell = new Shell(agl_shell, sh);
+
+	std::thread thread(start_grpc_server, aglShell);
+
+	// serve wayland requests
+	while (running && ret != -1) {
+		ret = wl_display_dispatch(sh->wl_display);
+	}
+
+	destroy_shell_data(sh);
+	return 0;
+}