Mandoline: Remove native_viewport.mojom

components/view_manager/native_viewport/native_viewport.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 "components/view_manager/native_viewport/native_viewport.h"
+
+#include "base/bind.h"
+#include "components/view_manager/event_dispatcher.h"
+#include "components/view_manager/gles2/gpu_state.h"
+#include "components/view_manager/native_viewport/platform_viewport_headless.h"
+#include "ui/events/event.h"
+#include "ui/gfx/geometry/size.h"
+
+namespace view_manager {
+
+NativeViewport::NativeViewport(
+    const gfx::Size& size,
+    bool is_headless,
+    const scoped_refptr<gles2::GpuState>& gpu_state,
+    EventDispatcher* event_dispatcher,
+    const ViewDestroyedCallback& view_destroyed_callback)
+    : context_provider_(
+          new native_viewport::OnscreenContextProvider(gpu_state)),
+      size_(size),
+      device_scale_factor_(1.f),
+      metrics_ready_(false),
+      event_dispatcher_(event_dispatcher),
+      view_destroyed_callback_(view_destroyed_callback),
+      weak_factory_(this) {
+  if (is_headless) {
+    platform_viewport_ =
+        native_viewport::PlatformViewportHeadless::Create(this);
+  } else {
+    platform_viewport_ = native_viewport::PlatformViewport::Create(this);
+  }
+  platform_viewport_->Init(gfx::Rect(size));
+}
+
+NativeViewport::~NativeViewport() {
+  // Destroy before |platform_viewport_| because this will destroy
+  // CommandBufferDriver objects that contain child windows. Otherwise if this
+  // class destroys its window first, X errors will occur.
+  context_provider_.reset();
+
+  // 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 NativeViewport::RequestMetrics(
+    const RequestMetricsCallback& callback) {
+  if (metrics_ready_) {
+    // Make sure we can't re-entrantly call this callback again.
+    metrics_ready_ = false;
+    callback.Run(size_, device_scale_factor_);
+    return;
+  }
+  metrics_callback_ = callback;
+}
+
+void NativeViewport::Show() {
+  platform_viewport_->Show();
+}
+
+void NativeViewport::Hide() {
+  platform_viewport_->Hide();
+}
+
+void NativeViewport::Close() {
+  DCHECK(platform_viewport_);
+  platform_viewport_->Close();
+}
+
+void NativeViewport::SetSize(const gfx::Size& size) {
+  platform_viewport_->SetBounds(gfx::Rect(size));
+}
+
+void NativeViewport::GetContextProvider(
+    mojo::InterfaceRequest<mojo::ContextProvider> request) {
+  context_provider_->Bind(request.Pass());
+}
+
+void NativeViewport::OnMetricsChanged(const gfx::Size& size,
+                                      float device_scale_factor) {
+  if (size_ == size && device_scale_factor_ == device_scale_factor)
+    return;
+
+  size_ = size;
+  device_scale_factor_ = device_scale_factor;
+  metrics_ready_ = true;
+  if (!metrics_callback_.is_null()) {
+    metrics_ready_ = false;
+    metrics_callback_.Run(size_, device_scale_factor_);
+    // TODO(fsamuel): calling the callback can reentrantly change the
+    // metrics_callback.
+    //metrics_callback_.reset();
+  }
+}
+
+void NativeViewport::OnAcceleratedWidgetAvailable(
+    gfx::AcceleratedWidget widget,
+    float device_pixel_ratio) {
+  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.
+  OnMetricsChanged(size_, device_pixel_ratio);
+}
+
+void NativeViewport::OnAcceleratedWidgetDestroyed() {
+  context_provider_->SetAcceleratedWidget(gfx::kNullAcceleratedWidget);
+}
+
+bool NativeViewport::OnEvent(mojo::EventPtr event) {
+  if (event.is_null() || !event_dispatcher_)
+    return false;
+
+  mojo::Callback<void()> callback;

[sky, 2015/06/04 22:37:58]

Alot of this code can be cleaned up too.

[Fady Samuel, 2015/06/05 22:14:31]

Done.

+  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(&NativeViewport::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 NativeViewport::OnDestroyed() {
+  if (!view_destroyed_callback_.is_null())
+    view_destroyed_callback_.Run();
+}
+
+void NativeViewport::AckEvent(int32 pointer_id) {
+  pointers_waiting_on_ack_.erase(pointer_id);
+}
+
+}  // namespace view_manager