ui/platform_window/fuchsia/initialize_presenter_api_view.cc

// Copyright 2018 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 "ui/platform_window/fuchsia/initialize_presenter_api_view.h"

#include <fuchsia/ui/policy/cpp/fidl.h>
#include <lib/sys/cpp/component_context.h>
#include <lib/ui/scenic/cpp/view_ref_pair.h>
#include <lib/ui/scenic/cpp/view_token_pair.h>

#include <utility>

#include "base/fuchsia/fuchsia_logging.h"
#include "base/fuchsia/process_context.h"
#include "base/no_destructor.h"

namespace ui {
namespace fuchsia {
namespace {
base::RepeatingCallback<void(::fuchsia::ui::views::ViewHolderToken,
                             ::fuchsia::ui::views::ViewRef)>&
GetScenicViewPresenterInternal() {
  static base::NoDestructor<base::RepeatingCallback<void(
      ::fuchsia::ui::views::ViewHolderToken, ::fuchsia::ui::views::ViewRef)>>
      view_presenter;
  return *view_presenter;
}

}  // namespace

void InitializeViewTokenAndPresentView(
    ui::PlatformWindowInitProperties* window_properties_out) {
  DCHECK(window_properties_out);

  // Generate ViewToken and ViewHolderToken for the new view.
  auto view_tokens = scenic::ViewTokenPair::New();
  window_properties_out->view_token =
      zx::handle(std::move(view_tokens.view_token.value));

  // Create a ViewRefPair so the view can be registered to the SemanticsManager.
  window_properties_out->view_ref_pair = scenic::ViewRefPair::New();

  // Request Presenter to show the view full-screen.
  auto presenter = base::ComponentContextForProcess()
                       ->svc()
                       ->Connect<::fuchsia::ui::policy::Presenter>();

  presenter->PresentOrReplaceView(std::move(view_tokens.view_holder_token),
                                  nullptr);
}

void SetScenicViewPresenter(
    base::RepeatingCallback<void(::fuchsia::ui::views::ViewHolderToken,
                                 ::fuchsia::ui::views::ViewRef)>
        view_presenter) {
  GetScenicViewPresenterInternal() = std::move(view_presenter);
}

const base::RepeatingCallback<void(::fuchsia::ui::views::ViewHolderToken,
                                   ::fuchsia::ui::views::ViewRef)>&
GetScenicViewPresenter() {
  return GetScenicViewPresenterInternal();
}

}  // namespace fuchsia
}  // namespace ui