third_party/blink/renderer/core/html/forms/external_popup_menu.h

/*
 * Copyright (C) 2010 Google Inc. All rights reserved.
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 * modification, are permitted provided that the following conditions are
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 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
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 * this software without specific prior written permission.
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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#ifndef THIRD_PARTY_BLINK_RENDERER_CORE_HTML_FORMS_EXTERNAL_POPUP_MENU_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_HTML_FORMS_EXTERNAL_POPUP_MENU_H_

#include <memory>
#include "cc/paint/paint_canvas.h"
#include "third_party/blink/public/web/web_external_popup_menu_client.h"
#include "third_party/blink/renderer/core/core_export.h"
#include "third_party/blink/renderer/core/html/forms/popup_menu.h"
#include "third_party/blink/renderer/platform/timer.h"
#include "third_party/blink/renderer/platform/wtf/compiler.h"

namespace blink {

class HTMLSelectElement;
class LocalFrame;
class WebExternalPopupMenu;
class WebMouseEvent;
class WebView;
struct WebPopupMenuInfo;

// The ExternalPopupMenu is a PopupMenu implementation for macOS and Android.
// It uses a OS-native menu implementation.
class CORE_EXPORT ExternalPopupMenu final : public PopupMenu,
                                            public WebExternalPopupMenuClient {
 public:
  ExternalPopupMenu(LocalFrame&, HTMLSelectElement&, WebView&);
  ~ExternalPopupMenu() override;

  // Fills |info| with the popup menu information contained in the
  // PopupMenuClient associated with this ExternalPopupMenu.
  // FIXME: public only for test access. Need to revert once gtest
  // helpers from chromium are available for blink.
  static void GetPopupMenuInfo(WebPopupMenuInfo&, HTMLSelectElement&);
  static int ToPopupMenuItemIndex(int index, HTMLSelectElement&);
  static int ToExternalPopupMenuItemIndex(int index, HTMLSelectElement&);

  void Trace(Visitor*) override;

 private:
  // PopupMenu methods:
  void Show() override;
  void Hide() override;
  void UpdateFromElement(UpdateReason) override;
  void DisconnectClient() override;

  // WebExternalPopupClient methods:
  void DidChangeSelection(int index) override;
  void DidAcceptIndex(int index) override;
  void DidAcceptIndices(const WebVector<int>& indices) override;
  void DidCancel() override;

  bool ShowInternal();
  void DispatchEvent(TimerBase*);
  void Update();

  Member<HTMLSelectElement> owner_element_;
  Member<LocalFrame> local_frame_;
  WebView& web_view_;
  std::unique_ptr<WebMouseEvent> synthetic_event_;
  TaskRunnerTimer<ExternalPopupMenu> dispatch_event_timer_;
  // The actual implementor of the show menu.
  WebExternalPopupMenu* web_external_popup_menu_;
  bool needs_update_ = false;
};

}  // namespace blink

#endif  // THIRD_PARTY_BLINK_RENDERER_CORE_HTML_FORMS_EXTERNAL_POPUP_MENU_H_