content/browser/font_unique_name_lookup/font_unique_name_lookup_service.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 "content/browser/font_unique_name_lookup/font_unique_name_lookup_service.h"

#include "base/feature_list.h"
#include "base/files/file_path.h"
#include "base/logging.h"
#include "base/macros.h"
#include "base/no_destructor.h"
#include "base/task/post_task.h"
#include "content/browser/font_unique_name_lookup/font_unique_name_lookup.h"
#include "content/public/common/content_features.h"
#include "mojo/public/cpp/bindings/strong_binding.h"

namespace content {

FontUniqueNameLookupService::FontUniqueNameLookupService()
    : font_unique_name_lookup_(::content::FontUniqueNameLookup::GetInstance()) {
  DCHECK(base::FeatureList::IsEnabled(features::kFontSrcLocalMatching));
}

FontUniqueNameLookupService::~FontUniqueNameLookupService() {}

// static
void FontUniqueNameLookupService::Create(
    blink::mojom::FontUniqueNameLookupRequest request) {
  mojo::MakeStrongBinding(std::make_unique<FontUniqueNameLookupService>(),
                          std::move(request));
}

// static
scoped_refptr<base::SequencedTaskRunner>
FontUniqueNameLookupService::GetTaskRunner() {
  static base::NoDestructor<scoped_refptr<base::SequencedTaskRunner>> runner(
      base::CreateSequencedTaskRunnerWithTraits(
          {base::MayBlock(), base::TaskShutdownBehavior::SKIP_ON_SHUTDOWN,
           base::TaskPriority::USER_BLOCKING}));
  return *runner;
}

void FontUniqueNameLookupService::GetUniqueNameLookupTable(
    GetUniqueNameLookupTableCallback callback) {
  DCHECK(GetTaskRunner()->RunsTasksInCurrentSequence());
  std::move(callback).Run(
      font_unique_name_lookup_.GetUniqueNameTableAsSharedMemoryRegion());
}

}  // namespace content