Framelet Prototype 2016 using Mojo IPC

components/framelet/renderer/framelet_container.cc

Index: components/framelet/renderer/framelet_container.cc
diff --git a/components/framelet/renderer/framelet_container.cc b/components/framelet/renderer/framelet_container.cc
new file mode 100644
index 0000000000000000000000000000000000000000..6d51b41efa2c60bf2aa3b12e7eec99a090c3256e
--- /dev/null
+++ b/components/framelet/renderer/framelet_container.cc
@@ -0,0 +1,262 @@
+// 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/framelet/renderer/framelet_container.h"
+
+#include "cc/blink/web_layer_impl.h"
+#include "cc/layers/solid_color_layer.h"
+#include "cc/layers/surface_layer.h"
+#include "components/framelet/common/framelet.mojom.h"
+#include "components/framelet/common/framelet_constants.h"
+#include "components/framelet/common/value_type_converters.h"
+#include "components/guest_view/common/guest_view_constants.h"
+#include "components/guest_view/common/guest_view_messages.h"
+#include "components/guest_view/renderer/guest_view_request.h"
+#include "content/public/common/service_registry.h"
+#include "content/public/renderer/render_frame.h"
+#include "content/public/renderer/render_thread.h"
+#include "content/public/renderer/render_view.h"
+#include "grit/components_scaled_resources.h"
+#include "mojo/converters/blink/blink_input_events_type_converters.h"
+#include "mojo/converters/geometry/geometry_type_converters.h"
+#include "mojo/converters/surfaces/surfaces_type_converters.h"
+#include "mojo/public/cpp/bindings/map.h"
+#include "third_party/WebKit/public/web/WebDocument.h"
+#include "third_party/WebKit/public/web/WebFramelet.h"
+#include "third_party/WebKit/public/web/WebInputEvent.h"
+#include "third_party/WebKit/public/web/WebLocalFrame.h"
+#include "ui/base/resource/resource_bundle.h"
+
+namespace framelet {
+
+FrameletContainer::FrameletContainer(content::RenderFrame* render_frame,
+                                     const GURL& url,
+                                     IPC::Sender* thread_safe_sender)
+    : GuestViewContainer(render_frame),
+      guest_instance_id_(guest_view::kInstanceIDNone),
+      focused_(false),
+      visible_(false),
+      killed_(false),
+      url_(url),
+      thread_safe_sender_(thread_safe_sender),
+      framelet_(nullptr),
+      solid_layer_(
+          cc::SolidColorLayer::Create(cc_blink::WebLayerImpl::LayerSettings())),
+      click_to_play_image_(ResourceBundle::GetSharedInstance().GetImageNamed(
+          IDR_FRAMELET_CLICK_TO_PLAY)),
+      click_to_play_layer_(
+          cc::UIResourceLayer::Create(cc_blink::WebLayerImpl::LayerSettings())),
+      binding_(this) {
+  SetElementInstanceID(content::RenderThread::Get()->GenerateRoutingID());
+}
+
+FrameletContainer::~FrameletContainer() {}
+
+void FrameletContainer::didAttach(blink::WebFramelet* framelet) {
+  framelet_ = framelet;
+  // Only create a Framelet if we have a non-zero size.
+  CreateFrameletIfReady(ResourceMonitoring::ENABLED);
+}
+
+void FrameletContainer::didDetach() {
+  if (framelet_guest_) {
+    framelet_guest_->Destroy();
+    framelet_guest_.reset();
+    binding_.Close();
+  }
+}
+
+void FrameletContainer::forwardInputEvent(
+    const blink::WebInputEvent* input_event) {
+  if (killed_) {
+    // If this guest has been killed.
+    // TODO(fsamuel): We want a platform-agnostic way to detect click.
+    bool click = input_event->type == blink::WebInputEvent::GestureTap ||
+                 ((input_event->type == blink::WebInputEvent::MouseUp) &&
+                  (static_cast<const blink::WebMouseEvent*>(input_event)
+                       ->clickCount == 1));
+    if (click) {
+      CreateFrameletIfReady(ResourceMonitoring::DISABLED);
+      return;
+    }
+  }
+
+  if (!has_guest())
+    return;
+
+  mojo::Array<uint8_t> mojo_input(input_event->size);
+  memcpy(&mojo_input.front(), input_event, input_event->size);
+  framelet_guest_->ForwardInput(std::move(mojo_input));
+}
+
+void FrameletContainer::frameRectsChanged(const blink::WebRect& frame_rect) {
+  element_size_ = gfx::Size(frame_rect.width, frame_rect.height);
+  UpdateClickToPlayLayerPosition();
+  if (!ready_) {
+    ready_ = true;
+    CreateFrameletIfReady(ResourceMonitoring::ENABLED);
+    return;
+  }
+  if (!has_guest())
+    return;
+
+  framelet_guest_->Resize(mojo::Size::From(element_size_));
+}
+
+void FrameletContainer::updateFocus(bool focused,
+                                    blink::WebFocusType focus_type) {
+  focused_ = focused;
+  focus_type_ = focus_type;
+  if (!has_guest())
+    return;
+  framelet_guest_->SetFocus(focused, static_cast<mojom::FocusType>(focus_type));
+}
+
+void FrameletContainer::updateVisibility(bool visible) {
+  visible_ = visible;
+  if (!has_guest())
+    return;
+
+  framelet_guest_->SetVisible(visible);
+}
+
+mojo::Map<mojo::String, mojom::ValuePtr> FrameletContainer::GetParams(
+    ResourceMonitoring resource_monitoring) const {
+  mojo::Map<mojo::String, mojom::ValuePtr> params;
+  params[guest_view::kElementWidth] =
+      mojom::Value::From(element_size().width());
+  params[guest_view::kElementHeight] =
+      mojom::Value::From(element_size().height());
+  params[guest_view::kUrl] = mojom::Value::From(url().spec());
+  params[kFocused] = mojom::Value::From(focused());
+  params[kVisible] = mojom::Value::From(visible());
+  params[kMonitorResources] =
+      mojom::Value::From(resource_monitoring == ResourceMonitoring::ENABLED);
+  return params;
+}
+
+void FrameletContainer::CreateFrameletIfReady(
+    ResourceMonitoring resource_monitoring) {
+  if (!ready_ || !framelet_ || !render_frame())
+    return;
+
+  killed_ = false;
+  solid_layer_->SetIsDrawable(false);
+  click_to_play_layer_->SetIsDrawable(false);
+
+  // Get a Framelet Factory.
+  mojom::FrameletFactoryPtr factory;
+  render_frame()->GetServiceRegistry()->ConnectToRemoteService(
+      mojo::GetProxy(&factory));
+
+  // Create a Framelet.
+  factory->Create(mojo::GetProxy(&framelet_guest_),
+                  GetParams(resource_monitoring));
+
+  // Attach the Framelet to this container.
+  mojom::FrameletClientPtr client;
+  binding_.Bind(GetProxy(&client));
+  framelet_guest_->Attach(std::move(client), GetParams(resource_monitoring));
+}
+
+void FrameletContainer::UpdateClickToPlayLayerPosition() {
+  gfx::PointF position(
+      (element_size().width() - click_to_play_image_.Size().width()) / 2.f,
+      (element_size().height() - click_to_play_image_.Size().height()) / 2.f);
+  click_to_play_layer_->SetPosition(position);
+}
+
+void FrameletContainer::ReportMemoryUsage(
+    mojom::ResourceUsageLevel usage_level) {
+  // TODO(fsamuel): Do something useful with the heap size.
+  switch (usage_level) {
+    case mojom::ResourceUsageLevel::LOW: {
+      solid_layer_->SetIsDrawable(false);
+      click_to_play_layer_->SetIsDrawable(false);
+      return;
+    }
+    case mojom::ResourceUsageLevel::MEDIUM: {
+      solid_layer_->SetIsDrawable(true);
+      solid_layer_->SetBackgroundColor(SkColorSetARGBInline(255, 255, 255, 0));
+      click_to_play_layer_->SetIsDrawable(false);
+      return;
+    }
+    case mojom::ResourceUsageLevel::HIGH: {
+      solid_layer_->SetIsDrawable(true);
+      solid_layer_->SetBackgroundColor(SkColorSetARGBInline(255, 255, 0, 0));
+      click_to_play_layer_->SetIsDrawable(false);
+      return;
+    }
+    case mojom::ResourceUsageLevel::CRITICAL: {
+      killed_ = true;
+      solid_layer_->SetIsDrawable(true);
+      solid_layer_->SetBackgroundColor(SkColorSetARGBInline(255, 0, 0, 0));
+      click_to_play_layer_->SetIsDrawable(true);
+      // Kill the guest.
+      if (framelet_guest_) {
+        framelet_guest_->Destroy();
+        framelet_guest_.reset();
+        binding_.Close();
+      }
+      return;
+    }
+    default:
+      DCHECK(false);
+  }
+}
+
+void FrameletContainer::SetChildFrameSurface(
+    mus::mojom::SurfaceIdPtr surface_id,
+    mojo::SizePtr frame_size,
+    float scale_factor) {
+  cc::SurfaceLayer::SatisfyCallback satisfy_callback =
+      base::Bind(&FrameletContainer::SatisfyCallbackOnCompositorThread,
+                 thread_safe_sender_, render_frame()->GetRoutingID(),
+                 element_instance_id());
+  cc::SurfaceLayer::RequireCallback require_callback =
+      base::Bind(&FrameletContainer::RequireCallbackOnCompositorThread,
+                 thread_safe_sender_, render_frame()->GetRoutingID(),
+                 element_instance_id());
+  scoped_refptr<cc::SurfaceLayer> surface_layer =
+      cc::SurfaceLayer::Create(cc_blink::WebLayerImpl::LayerSettings(),
+                               satisfy_callback, require_callback);
+  surface_layer->SetSurfaceId(surface_id.To<cc::SurfaceId>(), scale_factor,
+                              frame_size.To<gfx::Size>());
+  gfx::Size frame_size_in_dip(
+      gfx::ScaleToFlooredSize(frame_size.To<gfx::Size>(), 1.0f / scale_factor));
+  surface_layer->SetBounds(frame_size_in_dip);
+
+  solid_layer_->SetMasksToBounds(true);
+  solid_layer_->SetBounds(frame_size_in_dip);
+  solid_layer_->SetBackgroundColor(SkColorSetARGBInline(255, 0, 0, 192));
+  solid_layer_->SetIsDrawable(false);
+  solid_layer_->SetOpacity(0.5f);
+  surface_layer->AddChild(solid_layer_);
+
+  SkBitmap* bitmap = const_cast<SkBitmap*>(click_to_play_image_.ToSkBitmap());
+  click_to_play_layer_->SetMasksToBounds(true);
+  click_to_play_layer_->SetBounds(click_to_play_image_.Size());
+  click_to_play_layer_->SetBitmap(*bitmap);
+  click_to_play_layer_->SetOpacity(0.75f);
+  surface_layer->AddChild(click_to_play_layer_);
+
+  blink::WebLayer* layer = new cc_blink::WebLayerImpl(surface_layer);
+  framelet_->setWebLayer(layer);
+  web_layer_.reset(layer);
+}
+
+void FrameletContainer::SatisfyCallbackOnCompositorThread(
+    IPC::Sender* sender,
+    int host_routing_id,
+    int element_instance_id,
+    cc::SurfaceSequence sequence) {}
+
+void FrameletContainer::RequireCallbackOnCompositorThread(
+    IPC::Sender* sender,
+    int host_routing_id,
+    int element_instance_id,
+    cc::SurfaceId id,
+    cc::SurfaceSequence sequence) {}
+
+}  // namespace framelet