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mojo/services/native_viewport/native_viewport_impl.cc

+// Copyright 2014 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_impl.h"
+
+#include "base/auto_reset.h"
+#include "base/bind.h"
+#include "base/macros.h"
+#include "base/message_loop/message_loop.h"
+#include "base/time/time.h"
+#include "mojo/converters/geometry/geometry_type_converters.h"
+#include "mojo/public/cpp/application/interface_factory.h"
+#include "mojo/services/gles2/gpu_state.h"
+#include "mojo/services/native_viewport/platform_viewport_headless.h"
+#include "ui/events/event.h"
+
+namespace native_viewport {
+
+NativeViewportImpl::NativeViewportImpl(
+    bool is_headless,
+    const scoped_refptr<gles2::GpuState>& gpu_state,
+    mojo::InterfaceRequest<mojo::NativeViewport> request)
+    : is_headless_(is_headless),
+      context_provider_(gpu_state),
+      sent_metrics_(false),
+      metrics_(mojo::ViewportMetrics::New()),
+      binding_(this, request.Pass()),
+      weak_factory_(this) {
+  binding_.set_error_handler(this);
+}
+
+NativeViewportImpl::~NativeViewportImpl() {
+  // Destroy the NativeViewport early on as it may call us back during
+  // destruction and we want to be in a known state.
+  platform_viewport_.reset();
+}
+
+void NativeViewportImpl::Create(mojo::SizePtr size,
+                                const CreateCallback& callback) {
+  create_callback_ = callback;
+  metrics_->size = size.Clone();
+  if (is_headless_)
+    platform_viewport_ = PlatformViewportHeadless::Create(this);
+  else
+    platform_viewport_ = PlatformViewport::Create(this);
+  platform_viewport_->Init(gfx::Rect(size.To<gfx::Size>()));
+}
+
+void NativeViewportImpl::RequestMetrics(
+    const RequestMetricsCallback& callback) {
+  if (!sent_metrics_) {
+    callback.Run(metrics_.Clone());
+    sent_metrics_ = true;
+    return;
+  }
+  metrics_callback_ = callback;
+}
+
+void NativeViewportImpl::Show() {
+  platform_viewport_->Show();
+}
+
+void NativeViewportImpl::Hide() {
+  platform_viewport_->Hide();
+}
+
+void NativeViewportImpl::Close() {
+  DCHECK(platform_viewport_);
+  platform_viewport_->Close();
+}
+
+void NativeViewportImpl::SetSize(mojo::SizePtr size) {
+  platform_viewport_->SetBounds(gfx::Rect(size.To<gfx::Size>()));
+}
+
+void NativeViewportImpl::GetContextProvider(
+    mojo::InterfaceRequest<mojo::ContextProvider> request) {
+  context_provider_.Bind(request.Pass());
+}
+
+void NativeViewportImpl::SetEventDispatcher(
+    mojo::NativeViewportEventDispatcherPtr dispatcher) {
+  event_dispatcher_ = dispatcher.Pass();
+}
+
+void NativeViewportImpl::OnMetricsChanged(mojo::ViewportMetricsPtr metrics) {
+  if (metrics_->Equals(*metrics))
+    return;
+
+  metrics_ = metrics.Pass();
+  sent_metrics_ = false;
+
+  if (!metrics_callback_.is_null()) {
+    metrics_callback_.Run(metrics_.Clone());
+    metrics_callback_.reset();
+    sent_metrics_ = true;
+  }
+}
+
+void NativeViewportImpl::OnAcceleratedWidgetAvailable(
+    gfx::AcceleratedWidget widget) {
+  context_provider_.SetAcceleratedWidget(widget);
+  // TODO: The metrics here might not match the actual window size on android
+  // where we don't know the actual size until the first OnMetricsChanged call.
+  create_callback_.Run(metrics_.Clone());
+  sent_metrics_ = true;
+  create_callback_.reset();
+}
+
+void NativeViewportImpl::OnAcceleratedWidgetDestroyed() {
+  context_provider_.SetAcceleratedWidget(gfx::kNullAcceleratedWidget);
+}
+
+bool NativeViewportImpl::OnEvent(mojo::EventPtr event) {
+  if (event.is_null() || !event_dispatcher_.get())
+    return false;
+
+  mojo::NativeViewportEventDispatcher::OnEventCallback callback;
+  switch (event->action) {
+    case mojo::EVENT_TYPE_POINTER_MOVE: {
+      // TODO(sky): add logic to remember last event location and not send if
+      // the same.
+      if (pointers_waiting_on_ack_.count(event->pointer_data->pointer_id))
+        return false;
+
+      pointers_waiting_on_ack_.insert(event->pointer_data->pointer_id);
+      callback =
+          base::Bind(&NativeViewportImpl::AckEvent, weak_factory_.GetWeakPtr(),
+                     event->pointer_data->pointer_id);
+      break;
+    }
+
+    case mojo::EVENT_TYPE_POINTER_CANCEL:
+      pointers_waiting_on_ack_.clear();
+      break;
+
+    case mojo::EVENT_TYPE_POINTER_UP:
+      pointers_waiting_on_ack_.erase(event->pointer_data->pointer_id);
+      break;
+
+    default:
+      break;
+  }
+
+  event_dispatcher_->OnEvent(event.Pass(), callback);
+  return false;
+}
+
+void NativeViewportImpl::OnDestroyed() {
+  // This will signal a connection error and cause us to delete |this|.
+  binding_.Close();
+}
+
+void NativeViewportImpl::OnConnectionError() {
+  binding_.set_error_handler(nullptr);
+  delete this;
+}
+
+void NativeViewportImpl::AckEvent(int32 pointer_id) {
+  pointers_waiting_on_ack_.erase(pointer_id);
+}
+
+}  // namespace native_viewport