Get mojo_shell building inside chromium checkout.

mojo/shell/android/main.cc

+// Copyright 2013 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 "mojo/shell/android/main.h"
+
+#include "base/android/fifo_utils.h"
+#include "base/android/jni_android.h"
+#include "base/android/jni_array.h"
+#include "base/android/jni_string.h"
+#include "base/at_exit.h"
+#include "base/bind.h"
+#include "base/command_line.h"
+#include "base/files/file_path.h"
+#include "base/files/file_util.h"
+#include "base/lazy_instance.h"
+#include "base/logging.h"
+#include "base/macros.h"
+#include "base/message_loop/message_loop.h"
+#include "base/run_loop.h"
+#include "base/threading/simple_thread.h"
+#include "jni/ShellMain_jni.h"
+#include "mojo/common/message_pump_mojo.h"
+#include "mojo/shell/android/android_handler_loader.h"
+#include "mojo/shell/android/background_application_loader.h"
+#include "mojo/shell/android/native_viewport_application_loader.h"
+#include "mojo/shell/android/ui_application_loader_android.h"
+#include "mojo/shell/application_manager/application_loader.h"
+#include "mojo/shell/command_line_util.h"
+#include "mojo/shell/context.h"
+#include "mojo/shell/init.h"
+#include "ui/gl/gl_surface_egl.h"
+
+using base::LazyInstance;
+
+namespace mojo {
+namespace shell {
+
+namespace {
+
+// Tag for logging.
+const char kLogTag[] = "chromium";
+
+// Command line argument for the communication fifo.
+const char kFifoPath[] = "fifo-path";
+
+class MojoShellRunner : public base::DelegateSimpleThread::Delegate {
+ public:
+  MojoShellRunner(const std::vector<std::string>& parameters)
+      : parameters_(parameters) {}
+  ~MojoShellRunner() override {}
+
+ private:
+  void Run() override;
+
+  std::vector<std::string> parameters_;
+
+  DISALLOW_COPY_AND_ASSIGN(MojoShellRunner);
+};
+
+LazyInstance<scoped_ptr<base::MessageLoop>> g_java_message_loop =
+    LAZY_INSTANCE_INITIALIZER;
+
+LazyInstance<scoped_ptr<Context>> g_context = LAZY_INSTANCE_INITIALIZER;
+
+LazyInstance<scoped_ptr<MojoShellRunner>> g_shell_runner =
+    LAZY_INSTANCE_INITIALIZER;
+
+LazyInstance<scoped_ptr<base::DelegateSimpleThread>> g_shell_thread =
+    LAZY_INSTANCE_INITIALIZER;
+
+LazyInstance<base::android::ScopedJavaGlobalRef<jobject>> g_main_activiy =
+    LAZY_INSTANCE_INITIALIZER;
+
+void ConfigureAndroidServices(Context* context) {
+  context->application_manager()->SetLoaderForURL(
+      make_scoped_ptr(new UIApplicationLoader(
+          make_scoped_ptr(new NativeViewportApplicationLoader()),
+          g_java_message_loop.Get().get())),
+      GURL("mojo:native_viewport_service"));
+
+  // Android handler is bundled with the Mojo shell, because it uses the
+  // MojoShell application as the JNI bridge to bootstrap execution of other
+  // Android Mojo apps that need JNI.
+  context->application_manager()->SetLoaderForURL(
+      make_scoped_ptr(new BackgroundApplicationLoader(
+          make_scoped_ptr(new AndroidHandlerLoader()), "android_handler",
+          base::MessageLoop::TYPE_DEFAULT)),
+      GURL("mojo:android_handler"));
+
+  // By default, the keyboard is handled by the native_viewport_service.
+  context->url_resolver()->AddURLMapping(GURL("mojo:keyboard"),
+                                         GURL("mojo:native_viewport_service"));
+}
+
+void QuitShellThread() {
+  g_shell_thread.Get()->Join();
+  g_shell_thread.Pointer()->reset();
+  Java_ShellMain_finishActivity(base::android::AttachCurrentThread(),
+                                g_main_activiy.Get().obj());
+  exit(0);
+}
+
+void MojoShellRunner::Run() {
+  base::MessageLoop loop(common::MessagePumpMojo::Create());
+  Context* context = g_context.Pointer()->get();
+  ConfigureAndroidServices(context);
+  context->Init();
+
+  for (auto& args : parameters_)
+    ApplyApplicationArgs(context, args);
+
+  RunCommandLineApps(context);
+  loop.Run();
+
+  g_java_message_loop.Pointer()->get()->PostTask(FROM_HERE,
+                                                 base::Bind(&QuitShellThread));
+}
+
+// Initialize stdout redirection if the command line switch is present.
+void InitializeRedirection() {
+  if (!base::CommandLine::ForCurrentProcess()->HasSwitch(kFifoPath))
+    return;
+
+  base::FilePath fifo_path =
+      base::CommandLine::ForCurrentProcess()->GetSwitchValuePath(kFifoPath);
+  base::FilePath directory = fifo_path.DirName();
+  CHECK(base::CreateDirectoryAndGetError(directory, nullptr))
+      << "Unable to create directory: " << directory.value();
+  unlink(fifo_path.value().c_str());
+  CHECK(base::android::CreateFIFO(fifo_path, 0666))
+      << "Unable to create fifo: " << fifo_path.value();
+  CHECK(base::android::RedirectStream(stdout, fifo_path, "w"))
+      << "Failed to redirect stdout to file: " << fifo_path.value();
+  CHECK(dup2(STDOUT_FILENO, STDERR_FILENO) != -1)
+      << "Unable to redirect stderr to stdout.";
+}
+
+}  // namespace
+
+static void Init(JNIEnv* env,
+                 jclass clazz,
+                 jobject activity,
+                 jstring mojo_shell_path,
+                 jobjectArray jparameters,
+                 jstring j_local_apps_directory,
+                 jstring j_tmp_dir) {
+  g_main_activiy.Get().Reset(env, activity);
+
+  // Setting the TMPDIR environment variable so that applications can use it.
+  // TODO(qsr) We will need our subprocesses to inherit this.
+  int return_value =
+      setenv("TMPDIR",
+             base::android::ConvertJavaStringToUTF8(env, j_tmp_dir).c_str(), 1);
+  DCHECK_EQ(return_value, 0);
+
+  base::android::ScopedJavaLocalRef<jobject> scoped_activity(env, activity);
+  base::android::InitApplicationContext(env, scoped_activity);
+
+  std::vector<std::string> parameters;
+  parameters.push_back(
+      base::android::ConvertJavaStringToUTF8(env, mojo_shell_path));
+  base::android::AppendJavaStringArrayToStringVector(env, jparameters,
+                                                     &parameters);
+  base::CommandLine::Init(0, nullptr);
+  base::CommandLine::ForCurrentProcess()->InitFromArgv(parameters);
+  g_shell_runner.Get().reset(new MojoShellRunner(parameters));
+
+  InitializeLogging();
+
+  InitializeRedirection();
+
+  // We want ~MessageLoop to happen prior to ~Context. Initializing
+  // LazyInstances is akin to stack-allocating objects; their destructors
+  // will be invoked first-in-last-out.
+  Context* shell_context = new Context();
+  shell_context->SetShellFileRoot(base::FilePath(
+      base::android::ConvertJavaStringToUTF8(env, j_local_apps_directory)));
+  g_context.Get().reset(shell_context);
+
+  g_java_message_loop.Get().reset(new base::MessageLoopForUI);
+  base::MessageLoopForUI::current()->Start();
+
+  // TODO(abarth): At which point should we switch to cross-platform
+  // initialization?
+
+  gfx::GLSurface::InitializeOneOff();
+}
+
+static jboolean Start(JNIEnv* env, jclass clazz) {
+  if (!base::CommandLine::ForCurrentProcess()->GetArgs().size())
+    return false;
+
+#if defined(MOJO_SHELL_DEBUG_URL)
+  base::CommandLine::ForCurrentProcess()->AppendArg(MOJO_SHELL_DEBUG_URL);
+  // Sleep for 5 seconds to give the debugger a chance to attach.
+  sleep(5);
+#endif
+
+  g_shell_thread.Get().reset(new base::DelegateSimpleThread(
+      g_shell_runner.Get().get(), "ShellThread"));
+  g_shell_thread.Get()->Start();
+  return true;
+}
+
+static void AddApplicationURL(JNIEnv* env, jclass clazz, jstring jurl) {
+  base::CommandLine::ForCurrentProcess()->AppendArg(
+      base::android::ConvertJavaStringToUTF8(env, jurl));
+}
+
+bool RegisterShellMain(JNIEnv* env) {
+  return RegisterNativesImpl(env);
+}
+
+}  // namespace shell
+}  // namespace mojo
+
+// TODO(vtl): Even though main() should never be called, mojo_shell fails to
+// link without it. Figure out if we can avoid this.
+int main(int argc, char** argv) {
+  NOTREACHED();
+}