chrome/browser/printing/prefs_util.cc

// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "chrome/browser/printing/prefs_util.h"

#include <string>

#include "base/values.h"
#include "chrome/common/pref_names.h"
#include "components/prefs/pref_service.h"
#include "printing/backend/print_backend_utils.h"
#include "printing/backend/printing_restrictions.h"
#include "third_party/abseil-cpp/absl/types/optional.h"
#include "ui/gfx/geometry/size.h"

namespace printing {

absl::optional<gfx::Size> ParsePaperSizeDefault(const PrefService& prefs) {
  if (!prefs.HasPrefPath(prefs::kPrintingPaperSizeDefault))
    return absl::nullopt;

  const base::Value::Dict& paper_size_dict =
      prefs.GetDict(prefs::kPrintingPaperSizeDefault);

  if (paper_size_dict.empty())
    return absl::nullopt;

  const base::Value::Dict* custom_size_dict =
      paper_size_dict.FindDict(kPaperSizeCustomSize);
  if (custom_size_dict) {
    return gfx::Size(*custom_size_dict->FindInt(kPaperSizeWidth),
                     *custom_size_dict->FindInt(kPaperSizeHeight));
  }

  const std::string* name = paper_size_dict.FindString(kPaperSizeName);
  DCHECK(name);
  return ParsePaper(*name).size_um;
}

}  // namespace printing