mozart: Initial commit of the launcher.

services/ui/launcher/launcher_app.cc

+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/trace_event/trace_event.h"
+#include "mojo/application/application_runner_chromium.h"
+#include "mojo/common/tracing_impl.h"
+#include "mojo/public/c/system/main.h"
+#include "mojo/public/cpp/application/application_connection.h"
+#include "mojo/public/cpp/application/application_impl.h"
+#include "mojo/services/surfaces/cpp/surfaces_utils.h"
+#include "mojo/services/surfaces/interfaces/quads.mojom.h"
+#include "services/ui/launcher/launcher_app.h"
+#include "services/ui/launcher/launcher_view_tree.h"
+
+namespace launcher {
+
+LauncherApp::LauncherApp()
+    : app_impl_(nullptr), viewport_event_dispatcher_binding_(this) {}
+
+LauncherApp::~LauncherApp() {}
+
+void LauncherApp::Initialize(mojo::ApplicationImpl* app) {
+  app_impl_ = app;
+  tracing_.Initialize(app);
+  TRACE_EVENT0("launcher", __func__);
+
+  if (app->args().size() != 2) {
+    LOG(ERROR) << "Invalid arguments.\n\n"
+                  "Usage: mojo_shell \"mojo:launcher <app url>\"";
+    app->Terminate();
+    return;
+  }
+
+  InitViewport();
+  LaunchClient(app->args()[1]);
+}
+
+void LauncherApp::InitViewport() {
+  app_impl_->ConnectToService("mojo:native_viewport_service",
+                              &viewport_service_);
+  viewport_service_.set_connection_error_handler(base::Bind(
+      &LauncherApp::OnViewportConnectionError, base::Unretained(this)));
+
+  mojo::NativeViewportEventDispatcherPtr dispatcher;
+  viewport_event_dispatcher_binding_.Bind(GetProxy(&dispatcher));
+  viewport_service_->SetEventDispatcher(dispatcher.Pass());
+
+  // Match the Nexus 5 aspect ratio initially.
+  auto size = mojo::Size::New();
+  size->width = 320;
+  size->height = 640;
+
+  auto requested_configuration = mojo::SurfaceConfiguration::New();
+  viewport_service_->Create(
+      size.Clone(), requested_configuration.Pass(),
+      base::Bind(&LauncherApp::OnViewportCreated, base::Unretained(this)));
+}
+
+void LauncherApp::OnViewportConnectionError() {
+  LOG(ERROR) << "Exiting due to viewport connection error.";
+  app_impl_->Terminate();
+}
+
+void LauncherApp::OnViewportCreated(mojo::ViewportMetricsPtr metrics) {
+  viewport_service_->Show();
+  mojo::ContextProviderPtr context_provider;
+  viewport_service_->GetContextProvider(GetProxy(&context_provider));
+
+  mojo::DisplayFactoryPtr display_factory;
+  app_impl_->ConnectToService("mojo:surfaces_service", &display_factory);
+
+  mojo::DisplayPtr display;
+  display_factory->Create(context_provider.Pass(), nullptr, GetProxy(&display));
+
+  view_tree_.reset(
+      new LauncherViewTree(app_impl_, display.Pass(), metrics.Pass()));
+  UpdateClientView();
+  RequestUpdatedViewportMetrics();
+}
+
+void LauncherApp::OnViewportMetricsChanged(mojo::ViewportMetricsPtr metrics) {
+  if (view_tree_) {
+    view_tree_->SetViewportMetrics(metrics.Pass());
+    RequestUpdatedViewportMetrics();
+  }
+}
+
+void LauncherApp::RequestUpdatedViewportMetrics() {
+  viewport_service_->RequestMetrics(base::Bind(
+      &LauncherApp::OnViewportMetricsChanged, base::Unretained(this)));
+}
+
+void LauncherApp::OnEvent(mojo::EventPtr event,
+                          const mojo::Callback<void()>& callback) {
+  if (view_tree_)
+    view_tree_->DispatchEvent(event.Pass());
+  callback.Run();
+}
+
+void LauncherApp::LaunchClient(std::string app_url) {
+  DVLOG(1) << "Launching " << app_url;
+
+  app_impl_->ConnectToService(app_url, &client_view_provider_);
+  client_view_provider_.set_connection_error_handler(base::Bind(
+      &LauncherApp::OnClientConnectionError, base::Unretained(this)));
+
+  client_view_provider_->CreateView(
+      nullptr, nullptr,
+      base::Bind(&LauncherApp::OnClientViewCreated, base::Unretained(this)));
+}
+
+void LauncherApp::OnClientConnectionError() {
+  LOG(ERROR) << "Exiting due to client application connection error.";
+  app_impl_->Terminate();
+}
+
+void LauncherApp::OnClientViewCreated(mojo::ui::ViewTokenPtr view_token) {
+  client_view_token_ = view_token.Pass();
+  UpdateClientView();
+}
+
+void LauncherApp::UpdateClientView() {
+  if (view_tree_)
+    view_tree_->SetRoot(client_view_token_.Clone());
+}
+
+}  // namespace launcher