Framelet Prototype 2016 using Mojo IPC

components/framelet/browser/framelet_guest.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/framelet/browser/framelet_guest.h"
+
+#include "base/memory/scoped_ptr.h"
+#include "base/strings/stringprintf.h"
+#include "cc/surfaces/surface.h"
+#include "components/framelet/browser/framelet_memory_tracker.h"
+#include "components/framelet/browser/resource_usage_reporter.h"
+#include "components/framelet/common/framelet_constants.h"
+#include "components/framelet/common/framelet_messages.h"
+#include "components/framelet/common/value_type_converters.h"
+#include "components/guest_view/browser/guest_view_manager.h"
+#include "components/strings/grit/components_chromium_strings.h"
+#include "content/public/browser/render_process_host.h"
+#include "content/public/browser/site_instance.h"
+#include "content/public/common/url_constants.h"
+#include "ipc/ipc_message.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"
+
+namespace framelet {
+
+// static.
+const char FrameletGuest::Type[] = "framelet";
+
+// static.
+guest_view::GuestViewBase* FrameletGuest::Create(
+    content::WebContents* owner_web_contents) {
+  return new FrameletGuest(owner_web_contents);
+}
+
+void FrameletGuest::Bind(mojo::InterfaceRequest<mojom::Framelet> request) {
+  binding_.Bind(std::move(request));
+}
+
+void FrameletGuest::ReportHeapSize(int heap_size) {
+  resource_usage_reporter_->ReportUsage(heap_size);
+}
+
+void FrameletGuest::OnResourceUsageLevelChanged(
+    const ResourceUsageLevel& usage_level) {
+  // The state machine reports usage level here.
+  // TODO(fsamuel): Feed this value through a ResourceUsageManager, that
+  // collects all values, and only updates the embedder if the max changes.
+  client_->ReportMemoryUsage(
+      static_cast<mojom::ResourceUsageLevel>(usage_level));
+}
+
+scoped_ptr<ResourceUsageRange<int>> FrameletGuest::GetRangeForUsageLevel(
+    const ResourceUsageLevel& usage_level) const {
+  switch (usage_level) {
+    case ResourceUsageLevel::LOW:
+      return make_scoped_ptr(new ResourceUsageRange<int>(
+          ResourceUsageRangeType::LEFT_UNBOUNDED, kMemoryUsageLimitLow));
+    case ResourceUsageLevel::MEDIUM:
+      return make_scoped_ptr(new ResourceUsageRange<int>(
+          kMemoryUsageLimitLow - kMemoryUsageRangeOverlap,
+          kMemoryUsageLimitMedium));
+    case ResourceUsageLevel::HIGH:
+      return make_scoped_ptr(new ResourceUsageRange<int>(
+          kMemoryUsageLimitMedium - kMemoryUsageRangeOverlap,
+          kMemoryUsageLimitHigh));
+    case ResourceUsageLevel::CRITICAL:
+      return make_scoped_ptr(new ResourceUsageRange<int>(
+          ResourceUsageRangeType::RIGHT_UNBOUNDED, kMemoryUsageLimitHigh));
+    default:
+      CHECK(false);
+      return nullptr;
+  }
+}
+
+bool FrameletGuest::SetChildFrameSurface(const cc::SurfaceId& surface_id,
+                                         const gfx::Size& frame_size,
+                                         float scale_factor,
+                                         const cc::SurfaceSequence& sequence) {
+  client_->SetChildFrameSurface(mus::mojom::SurfaceId::From(surface_id),
+                                mojo::Size::From(frame_size), scale_factor);
+  return true;
+}
+
+FrameletGuest::FrameletGuest(content::WebContents* owner_web_contents)
+    : GuestView<FrameletGuest>(owner_web_contents),
+      monitor_resources_(true),
+      binding_(this) {}
+
+FrameletGuest::~FrameletGuest() {}
+
+// Framelet implementation
+
+void FrameletGuest::Attach(mojom::FrameletClientPtr client,
+                           mojo::Map<mojo::String, mojom::ValuePtr> params) {
+  static int element_instance_id = 1 << 16;
+  client_ = std::move(client);
+  content::GuestAttachParams attach_params;
+  attach_params.visible = params[kVisible].To<bool>();
+  attach_params.focused = params[kFocused].To<bool>();
+  int element_width = params[guest_view::kElementWidth].To<int>();
+  int element_height = params[guest_view::kElementHeight].To<int>();
+  attach_params.view_rect = gfx::Rect(element_width, element_height);
+  guest_view::GuestViewManager* manager =
+      guest_view::GuestViewManager::FromBrowserContext(browser_context());
+  manager->AttachGuest(owner_web_contents()->GetRenderProcessHost()->GetID(),
+                       element_instance_id, guest_instance_id(),
+                       base::DictionaryValue());
+  host()->Attach(element_instance_id, owner_web_contents(), attach_params);
+}
+
+void FrameletGuest::Destroy() {
+  GuestViewBase::Destroy();
+}
+
+void FrameletGuest::ForwardInput(mojo::Array<uint8_t> event) {
+  // TODO(fsamuel): This is not safe. This needs to be validated.
+  const blink::WebInputEvent* input_event =
+      reinterpret_cast<blink::WebInputEvent*>(&event.front());
+  host()->ForwardInputEvent(input_event);
+}
+
+void FrameletGuest::Resize(mojo::SizePtr new_size) {
+  guest_view::SetSizeParams size_params;
+  size_params.normal_size.reset(new gfx::Size(new_size.To<gfx::Size>()));
+  SetSize(size_params);
+}
+
+void FrameletGuest::SetFocus(bool focused, mojom::FocusType focus_type) {
+  host()->SetFocus(focused, static_cast<blink::WebFocusType>(focus_type));
+}
+
+void FrameletGuest::SetVisible(bool visible) {
+  host()->SetContainerVisible(visible);
+}
+
+// content::WebContentsDelegate implementation.
+bool FrameletGuest::HandleContextMenu(
+    const content::ContextMenuParams& params) {
+  return false;
+}
+
+bool FrameletGuest::CanRunInDetachedState() const {
+  return true;
+}
+
+void FrameletGuest::CreateWebContents(
+    const base::DictionaryValue& create_params,
+    const guest_view::GuestViewBase::WebContentsCreatedCallback& callback) {
+  // For each embedder process, there should exist a framelet process.
+  GURL guest_site(base::StringPrintf(
+      "%s://framelet-%d", content::kGuestScheme,
+      owner_web_contents()->GetRenderProcessHost()->GetID()));
+
+  guest_view::GuestViewManager* guest_view_manager =
+      guest_view::GuestViewManager::FromBrowserContext(
+          owner_web_contents()->GetBrowserContext());
+  content::SiteInstance* guest_site_instance =
+      guest_view_manager->GetGuestSiteInstance(guest_site);
+  if (!guest_site_instance) {
+    guest_site_instance = content::SiteInstance::CreateForURL(
+        owner_web_contents()->GetBrowserContext(), guest_site);
+  }
+  content::WebContents::CreateParams params(
+      owner_web_contents()->GetBrowserContext(), guest_site_instance);
+  params.guest_delegate = this;
+  callback.Run(content::WebContents::Create(params));
+}
+
+const char* FrameletGuest::GetAPINamespace() const {
+  return framelet::kEmbedderAPINamespace;
+}
+
+int FrameletGuest::GetTaskPrefix() const {
+  return IDS_TASK_MANAGER_FRAMELET_TAG_PREFIX;
+}
+
+void FrameletGuest::DidAttachToEmbedder() {}
+
+void FrameletGuest::DidInitialize(const base::DictionaryValue& create_params) {
+  resource_usage_reporter_.reset(new ResourceUsageReporter<int>(this));
+  std::string url;
+  create_params.GetString(guest_view::kUrl, &url);
+  web_contents()->GetController().LoadURL(GURL(url), content::Referrer(),
+                                          ui::PAGE_TRANSITION_AUTO_TOPLEVEL,
+                                          std::string());
+
+  create_params.GetBoolean(framelet::kMonitorResources, &monitor_resources_);
+
+  if (monitor_resources_) {
+    FrameletMemoryTracker::ClientID client_id(
+        web_contents()->GetRenderProcessHost()->GetID(),
+        web_contents()->GetRoutingID());
+    FrameletMemoryTracker::FromBrowserContext(browser_context())
+        ->AddClient(client_id, this);
+  }
+}
+
+void FrameletGuest::WillDestroy() {
+  if (monitor_resources_) {
+    // TODO(fsamuel): Verify whether this is actually safe. The WebContents
+    // should still exist so we might be fine.
+    FrameletMemoryTracker::ClientID client_id(
+        web_contents()->GetRenderProcessHost()->GetID(),
+        web_contents()->GetRoutingID());
+    FrameletMemoryTracker::FromBrowserContext(browser_context())
+        ->RemoveClient(client_id);
+  }
+}
+
+}  // namespace framelet