qt-everywhere-src-5.15.1/qtwebengine/src/core/favicon_manager.h

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//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists purely as an
// implementation detail.  This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//

#ifndef FAVICON_MANAGER_H
#define FAVICON_MANAGER_H

#include "qtwebenginecoreglobal_p.h"
#include <memory>
#include <QtCore/QMap>
#include <QtCore/QObject>
#include <QtCore/QSize>
#include <QtCore/QUrl>
#include <QtGui/QIcon>

#include "web_engine_settings.h"

class GURL;
class SkBitmap;

namespace gfx {
class Size;
}

namespace content {
class WebContents;
}

namespace base {
template<class T>
class WeakPtrFactory;
}

namespace QtWebEngineCore {

class WebContentsAdapterClient;

// Based on src/3rdparty/chromium/content/public/common/favicon_url.h
class Q_WEBENGINECORE_PRIVATE_EXPORT FaviconInfo {
public:
    enum FaviconTypeFlag {
        InvalidIcon = 0,
        Favicon = 1 << 0,
        TouchIcon = 1 << 1,
        TouchPrecomposedIcon = 1 << 2
    };
    Q_DECLARE_FLAGS(FaviconTypeFlags, FaviconTypeFlag)

    FaviconInfo();
    FaviconInfo(const FaviconInfo &);
    FaviconInfo(const QUrl &, FaviconInfo::FaviconTypeFlags);
    ~FaviconInfo();

    bool isValid() const;
    bool isDownloaded() const;

    QUrl url;
    FaviconTypeFlags type;
    // Stores the largest size in case of multi-size icon
    QSize size;
    bool candidate;
    bool multiSize;
};


class Q_WEBENGINECORE_PRIVATE_EXPORT FaviconManager {

public:
    FaviconManager(content::WebContents *, WebContentsAdapterClient *);
    ~FaviconManager();

    QIcon getIcon(const QUrl &url = QUrl()) const;
    FaviconInfo getFaviconInfo(const QUrl &) const;
    QList<FaviconInfo> getFaviconInfoList(bool) const;
    void copyStateFrom(FaviconManager *source);

private:
    void update(const QList<FaviconInfo> &);
    void updateCandidates(const QList<FaviconInfo> &);
    void resetCandidates();
    bool hasCandidate() const;
    QUrl candidateIconUrl(bool touchIconsEnabled) const;
    void generateCandidateIcon(bool touchIconsEnabled);
    int downloadIcon(const QUrl &);
    void iconDownloadFinished(int, int, const GURL &, const std::vector<SkBitmap> &, const std::vector<gfx::Size> &);
    void storeIcon(int, const QIcon &);
    void downloadPendingRequests();
    void propagateIcon(const QUrl &) const;

private:
    content::WebContents *m_webContents;
    WebContentsAdapterClient *m_viewClient;
    QMap<QUrl, FaviconInfo> m_faviconInfoMap;
    int m_candidateCount;
    QIcon m_candidateIcon;
    QMap<QUrl, QIcon> m_icons;
    QMap<int, QUrl> m_inProgressRequests;
    QMap<int, QUrl> m_pendingRequests;
    std::unique_ptr<base::WeakPtrFactory<FaviconManager>> m_weakFactory;
    friend class WebContentsDelegateQt;
};

} // namespace QtWebEngineCore

#endif // FAVICON_MANAGER_H