// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef THIRD_PARTY_BLINK_PUBLIC_COMMON_METRICS_ACCEPT_LANGUAGE_AND_CONTENT_LANGUAGE_USAGE_H_
#define THIRD_PARTY_BLINK_PUBLIC_COMMON_METRICS_ACCEPT_LANGUAGE_AND_CONTENT_LANGUAGE_USAGE_H_

namespace blink {

// Used to record the matches between the Content-Language response header value
// and the Accept-Language request header values.
//
// Corresponds to the "AcceptLanguageAndContentLanguageUsage" histogram
// enumeration type in tools/metrics/histograms/enums.xml.
//
// PLEASE DO NOT REORDER, REMOVE, OR CHANGE THE MEANING OF THESE VALUES.
enum class AcceptLanguageAndContentLanguageUsage {
  kContentLanguageEmpty,
  kContentLanguageWildcard,
  kContentLanguageMatchesAnyAcceptLanguage,
  kContentLanguageMatchesPrimaryAcceptLanguage,
  kContentLanguageSubframeDiffers,
  kMaxValue = kContentLanguageSubframeDiffers
};

// Used to record the matches between the HTML or XML lang value and the
// Accept-Language request header values.
//
// Corresponds to the "AcceptLanguageAndXmlHtmlLangUsage" histogram enumeration
// type in tools/metrics/histograms/enums.xml.
//
// PLEASE DO NOT REORDER, REMOVE, OR CHANGE THE MEANING OF THESE VALUES.
enum class AcceptLanguageAndXmlHtmlLangUsage {
  kXmlLangEmpty,
  kXmlLangWildcard,
  kXmlLangMatchesAnyNonPrimayAcceptLanguage,
  kXmlLangMatchesPrimaryAcceptLanguage,
  kHtmlLangEmpty,
  kHtmlLangWildcard,
  kHtmlLangMatchesAnyNonPrimayAcceptLanguage,
  kHtmlLangMatchesPrimaryAcceptLanguage,
  kMaxValue = kHtmlLangMatchesPrimaryAcceptLanguage
};

}  // namespace blink

#endif  // THIRD_PARTY_BLINK_PUBLIC_COMMON_METRICS_ACCEPT_LANGUAGE_AND_CONTENT_LANGUAGE_USAGE_H_