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      1 // Copyright 2013 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #include "mojo/shell/android/mojo_main.h"
      6 
      7 #include "base/android/java_handler_thread.h"
      8 #include "base/android/jni_string.h"
      9 #include "base/at_exit.h"
     10 #include "base/bind.h"
     11 #include "base/command_line.h"
     12 #include "base/lazy_instance.h"
     13 #include "base/logging.h"
     14 #include "base/macros.h"
     15 #include "base/message_loop/message_loop.h"
     16 #include "jni/MojoMain_jni.h"
     17 #include "mojo/application_manager/application_loader.h"
     18 #include "mojo/application_manager/application_manager.h"
     19 #include "mojo/shell/context.h"
     20 #include "mojo/shell/init.h"
     21 #include "ui/gl/gl_surface_egl.h"
     22 
     23 using base::LazyInstance;
     24 
     25 namespace mojo {
     26 
     27 namespace {
     28 
     29 LazyInstance<scoped_ptr<base::MessageLoop> > g_java_message_loop =
     30     LAZY_INSTANCE_INITIALIZER;
     31 
     32 LazyInstance<scoped_ptr<shell::Context> > g_context =
     33     LAZY_INSTANCE_INITIALIZER;
     34 
     35 LazyInstance<scoped_ptr<base::android::JavaHandlerThread> > g_shell_thread =
     36     LAZY_INSTANCE_INITIALIZER;
     37 
     38 void RunShell(std::vector<GURL> app_urls) {
     39   shell::Context* context = g_context.Pointer()->get();
     40   context->Init();
     41   context->set_ui_loop(g_java_message_loop.Get().get());
     42   for (std::vector<GURL>::const_iterator it = app_urls.begin();
     43        it != app_urls.end(); ++it) {
     44     context->Run(*it);
     45   }
     46 }
     47 
     48 }  // namespace
     49 
     50 static void Init(JNIEnv* env, jclass clazz, jobject context) {
     51   base::android::ScopedJavaLocalRef<jobject> scoped_context(env, context);
     52 
     53   base::android::InitApplicationContext(env, scoped_context);
     54 
     55   base::CommandLine::Init(0, 0);
     56   mojo::shell::InitializeLogging();
     57 
     58   // We want ~MessageLoop to happen prior to ~Context. Initializing
     59   // LazyInstances is akin to stack-allocating objects; their destructors
     60   // will be invoked first-in-last-out.
     61   shell::Context* shell_context = new shell::Context();
     62   g_context.Get().reset(shell_context);
     63   g_java_message_loop.Get().reset(new base::MessageLoopForUI);
     64   base::MessageLoopForUI::current()->Start();
     65 
     66   // TODO(abarth): At which point should we switch to cross-platform
     67   // initialization?
     68 
     69   gfx::GLSurface::InitializeOneOff();
     70 }
     71 
     72 static void Start(JNIEnv* env, jclass clazz, jstring jurl) {
     73   std::vector<GURL> app_urls;
     74 #if defined(MOJO_SHELL_DEBUG_URL)
     75   app_urls.push_back(GURL(MOJO_SHELL_DEBUG_URL));
     76   // Sleep for 5 seconds to give the debugger a chance to attach.
     77   sleep(5);
     78 #else
     79   if (jurl)
     80     app_urls.push_back(GURL(base::android::ConvertJavaStringToUTF8(env, jurl)));
     81 #endif
     82 
     83   g_shell_thread.Get().reset(
     84       new base::android::JavaHandlerThread("shell_thread"));
     85   g_shell_thread.Get()->Start();
     86   g_shell_thread.Get()->message_loop()->PostTask(
     87       FROM_HERE, base::Bind(&RunShell, app_urls));
     88 }
     89 
     90 bool RegisterMojoMain(JNIEnv* env) {
     91   return RegisterNativesImpl(env);
     92 }
     93 
     94 }  // namespace mojo
     95