third_party/WebKit/Source/modules/media_controls/elements/MediaControlDownloadButtonElement.h

// Copyright 2017 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.

#ifndef MediaControlDownloadButtonElement_h
#define MediaControlDownloadButtonElement_h

#include "core/html/shadow/MediaControlElementTypes.h"

namespace blink {

class Event;
class MediaControlsImpl;

class MediaControlDownloadButtonElement final
    : public MediaControlInputElement {
 public:
  explicit MediaControlDownloadButtonElement(MediaControlsImpl&);

  // Returns true if the download button should be shown. We should
  // show the button for only non-MSE, non-EME, and non-MediaStream content.
  bool ShouldDisplayDownloadButton();

  // MediaControlInputElement overrides.
  // TODO(mlamouri): add WillRespondToMouseClickEvents
  WebLocalizedString::Name GetOverflowStringName() override;
  bool HasOverflowButton() override;
  void SetIsWanted(bool) override;

  DECLARE_VIRTUAL_TRACE();

 private:
  // This is used for UMA histogram (Media.Controls.Download). New values should
  // be appended only and must be added before |Count|.
  enum class DownloadActionMetrics {
    kShown = 0,
    kClicked,
    kCount  // Keep last.
  };

  void DefaultEventHandler(Event*) override;

  void RecordMetrics(DownloadActionMetrics);

  // Points to an anchor element that contains the URL of the media file.
  Member<HTMLAnchorElement> anchor_;

  // UMA related boolean. They are used to prevent counting something twice
  // for the same media element.
  bool click_use_counted_ = false;
  bool show_use_counted_ = false;
};

}  // namespace blink

#endif  // MediaControlDownloadButtonElement_h