third_party/WebKit/Source/web/ExternalPopupMenu.h

/*
 * Copyright (C) 2010 Google Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
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 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above
 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
 * distribution.
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 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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#ifndef ExternalPopupMenu_h
#define ExternalPopupMenu_h

#include "platform/PopupMenu.h"
#include "platform/Timer.h"
#include "public/platform/WebCanvas.h"
#include "public/platform/WebScrollbar.h"
#include "public/web/WebExternalPopupMenuClient.h"
#include "web/WebExport.h"
#include "wtf/Compiler.h"
#include <memory>

namespace blink {

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

// The ExternalPopupMenu connects the actual implementation of the popup menu
// to the WebCore popup menu.
class WEB_EXPORT ExternalPopupMenu final : WTF_NON_EXPORTED_BASE(public PopupMenu), public WebExternalPopupMenuClient {
public:
    ExternalPopupMenu(LocalFrame&, HTMLSelectElement&, WebViewImpl&);
    ~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&);

    DECLARE_VIRTUAL_TRACE();

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(Timer<ExternalPopupMenu>*);
    void update();

    Member<HTMLSelectElement> m_ownerElement;
    Member<LocalFrame> m_localFrame;
    WebViewImpl& m_webView;
    std::unique_ptr<WebMouseEvent> m_syntheticEvent;
    Timer<ExternalPopupMenu> m_dispatchEventTimer;
    // The actual implementor of the show menu.
    WebExternalPopupMenu* m_webExternalPopupMenu;
    bool m_needsUpdate = false;
};

} // namespace blink

#endif // ExternalPopupMenu_h