Implement ServiceManager

mojo/services/native_viewport/native_viewport_service.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/services/native_viewport/native_viewport_service.h"
+
+#include "base/message_loop/message_loop.h"
+#include "base/time/time.h"
+#include "mojo/common/bindings_support_impl.h"
+#include "mojo/services/gles2/gles2_impl.h"
+#include "mojo/services/native_viewport/native_viewport.h"
+#include "mojom/native_viewport.h"
+#include "ui/events/event.h"
+
+#if defined(WIN32)
+#if !defined(CDECL)
+#define CDECL __cdecl
+#endif
+#define NATIVE_VIEWPORT_EXPORT __declspec(dllexport)
+#else
+#define CDECL
+#define NATIVE_VIEWPORT_EXPORT __attribute__((visibility("default")))
+#endif
+
+namespace mojo {
+namespace services {
+namespace {
+
+bool IsRateLimitedEventType(ui::Event* event) {
+  return event->type() == ui::ET_MOUSE_MOVED ||
+         event->type() == ui::ET_MOUSE_DRAGGED ||
+         event->type() == ui::ET_TOUCH_MOVED;
+}
+
+}
+
+class NativeViewportService::NativeViewportImpl
+    : public NativeViewportStub,
+      public NativeViewportDelegate {
+ public:
+  NativeViewportImpl(NativeViewportService* service,
+                     ScopedMessagePipeHandle client_handle)
+      : service_(service),
+        widget_(gfx::kNullAcceleratedWidget),
+        waiting_for_event_ack_(false),
+        pending_event_timestamp_(0),
+        client_(client_handle.Pass()) {
+    client_.SetPeer(this);
+  }
+  virtual ~NativeViewportImpl() {}
+
+  virtual void Open() MOJO_OVERRIDE {
+    native_viewport_ =
+        services::NativeViewport::Create(service_->context_, this);
+    native_viewport_->Init();
+    client_->OnCreated();
+  }
+
+  virtual void Close() MOJO_OVERRIDE {
+    gles2_.reset();
+    DCHECK(native_viewport_);
+    native_viewport_->Close();
+  }
+
+  virtual void CreateGLES2Context(ScopedMessagePipeHandle client_handle)
+      MOJO_OVERRIDE {
+    gles2_.reset(new GLES2Impl(client_handle.Pass()));
+    CreateGLES2ContextIfNeeded();
+  }
+
+  virtual void AckEvent(const Event& event) MOJO_OVERRIDE {
+    DCHECK_EQ(event.time_stamp(), pending_event_timestamp_);
+    waiting_for_event_ack_ = false;
+  }
+
+  void CreateGLES2ContextIfNeeded() {
+    if (widget_ == gfx::kNullAcceleratedWidget || !gles2_)
+      return;
+    gles2_->CreateContext(widget_, native_viewport_->GetSize());
+  }
+
+  virtual bool OnEvent(ui::Event* ui_event) MOJO_OVERRIDE {
+    // Must not return early before updating capture.
+    switch (ui_event->type()) {
+    case ui::ET_MOUSE_PRESSED:
+    case ui::ET_TOUCH_PRESSED:
+      native_viewport_->SetCapture();
+      break;
+    case ui::ET_MOUSE_RELEASED:
+    case ui::ET_TOUCH_RELEASED:
+      native_viewport_->ReleaseCapture();
+      break;
+    default:
+      break;
+    }
+
+    if (waiting_for_event_ack_ && IsRateLimitedEventType(ui_event))
+      return false;
+
+    AllocationScope scope;
+
+    Event::Builder event;
+    event.set_action(ui_event->type());
+    event.set_time_stamp(ui_event->time_stamp().ToInternalValue());
+
+    if (ui_event->IsMouseEvent() || ui_event->IsTouchEvent()) {
+      ui::LocatedEvent* located_event =
+          static_cast<ui::LocatedEvent*>(ui_event);
+      Point::Builder location;
+      location.set_x(located_event->location().x());
+      location.set_y(located_event->location().y());
+      event.set_location(location.Finish());
+    }
+
+    if (ui_event->IsTouchEvent()) {
+      ui::TouchEvent* touch_event = static_cast<ui::TouchEvent*>(ui_event);
+      TouchData::Builder touch_data;
+      touch_data.set_pointer_id(touch_event->touch_id());
+      event.set_touch_data(touch_data.Finish());
+    }
+
+    client_->OnEvent(event.Finish());
+    waiting_for_event_ack_ = true;
+    return false;
+  }
+
+  virtual void OnAcceleratedWidgetAvailable(
+      gfx::AcceleratedWidget widget) MOJO_OVERRIDE {
+    widget_ = widget;
+    CreateGLES2ContextIfNeeded();
+  }
+
+  virtual void OnResized(const gfx::Size& size) MOJO_OVERRIDE {
+  }
+
+  virtual void OnDestroyed() MOJO_OVERRIDE {
+    // TODO(beng):
+    // Destroying |gles2_| on the shell thread here hits thread checker
+    // asserts. All code must stop touching the AcceleratedWidget at this
+    // point as it is dead after this call stack. jamesr said we probably
+    // should make our own GLSurface and simply tell it to stop touching the
+    // AcceleratedWidget via Destroy() but we have no good way of doing that
+    // right now given our current threading model so james' recommendation
+    // was just to wait until after we move the gl service out of process.
+    // gles2_.reset();
+    client_->OnDestroyed();
+    base::MessageLoop::current()->Quit();
+  }
+
+ private:
+  NativeViewportService* service_;
+  gfx::AcceleratedWidget widget_;
+  scoped_ptr<services::NativeViewport> native_viewport_;
+  scoped_ptr<GLES2Impl> gles2_;
+  bool waiting_for_event_ack_;
+  int64 pending_event_timestamp_;
+
+  RemotePtr<NativeViewportClient> client_;
+};
+
+NativeViewportService::NativeViewportService(
+    ScopedMessagePipeHandle shell_handle)
+    : shell_(shell_handle.Pass()),
+      context_(NULL) {
+  shell_.SetPeer(this);
+}
+
+NativeViewportService::~NativeViewportService() {}
+
+void NativeViewportService::AcceptConnection(
+    ScopedMessagePipeHandle client_handle) {
+  // TODO(davemoore): We need a mechanism to determine when connectors
+  // go away, so we can remove viewports correctly.
+  viewports_.push_back(new NativeViewportImpl(this, client_handle.Pass()));
+}
+
+}  // namespace services
+}  // namespace mojo
+
+extern "C" NATIVE_VIEWPORT_EXPORT MojoResult CDECL MojoMain(
+    const MojoHandle shell_handle) {
+  mojo::common::BindingsSupportImpl bindings_support_impl;
+  mojo::BindingsSupport::Set(&bindings_support_impl);
+
+  base::MessageLoop loop(base::MessageLoop::TYPE_UI);
+  mojo::services::NativeViewportService app(
+      mojo::MakeScopedHandle(mojo::MessagePipeHandle(shell_handle)).Pass());
+  base::MessageLoop::current()->Run();
+
+  mojo::BindingsSupport::Set(NULL);
+  return MOJO_RESULT_OK;
+}