// Copyright (C) 2018 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only

#ifndef QPLATFORMDIALOGHELPER_H
#define QPLATFORMDIALOGHELPER_H

//
//  W A R N I N G
//  -------------
//
// This file is part of the QPA API and is not meant to be used
// in applications. Usage of this API may make your code
// source and binary incompatible with future versions of Qt.
//

#include <QtGui/qtguiglobal.h>
#include <QtCore/QtGlobal>
#include <QtCore/QObject>
#include <QtCore/QList>
#include <QtCore/QSharedDataPointer>
#include <QtCore/QSharedPointer>
#include <QtCore/QDir>
#include <QtCore/QUrl>
#include <QtGui/QRgb>
Q_MOC_INCLUDE(<QFont>)
Q_MOC_INCLUDE(<QColor>)

QT_BEGIN_NAMESPACE


class QString;
class QColor;
class QFont;
class QWindow;
class QVariant;
class QUrl;
class QColorDialogOptionsPrivate;
class QFontDialogOptionsPrivate;
class QFileDialogOptionsPrivate;
class QMessageDialogOptionsPrivate;

#define QPLATFORMDIALOGHELPERS_HAS_CREATE

class Q_GUI_EXPORT QPlatformDialogHelper : public QObject
{
    Q_OBJECT
public:
    enum StyleHint {
        DialogIsQtWindow
    };
    enum DialogCode { Rejected, Accepted };

    enum StandardButton {
        // keep this in sync with QDialogButtonBox::StandardButton and QMessageBox::StandardButton
        NoButton           = 0x00000000,
        Ok                 = 0x00000400,
        Save               = 0x00000800,
        SaveAll            = 0x00001000,
        Open               = 0x00002000,
        Yes                = 0x00004000,
        YesToAll           = 0x00008000,
        No                 = 0x00010000,
        NoToAll            = 0x00020000,
        Abort              = 0x00040000,
        Retry              = 0x00080000,
        Ignore             = 0x00100000,
        Close              = 0x00200000,
        Cancel             = 0x00400000,
        Discard            = 0x00800000,
        Help               = 0x01000000,
        Apply              = 0x02000000,
        Reset              = 0x04000000,
        RestoreDefaults    = 0x08000000,


        FirstButton        = Ok,                // internal
        LastButton         = RestoreDefaults,   // internal
        LowestBit          = 10,                // internal: log2(FirstButton)
        HighestBit         = 27                 // internal: log2(LastButton)
    };

    Q_DECLARE_FLAGS(StandardButtons, StandardButton)
    Q_FLAG(StandardButtons)

    enum ButtonRole {
        // keep this in sync with QDialogButtonBox::ButtonRole and QMessageBox::ButtonRole
        // TODO Qt 6: make the enum copies explicit, and make InvalidRole == 0 so that
        // AcceptRole can be or'ed with flags, and EOL can be the same as InvalidRole (null-termination)
        InvalidRole = -1,
        AcceptRole,
        RejectRole,
        DestructiveRole,
        ActionRole,
        HelpRole,
        YesRole,
        NoRole,
        ResetRole,
        ApplyRole,

        NRoles,

        RoleMask        = 0x0FFFFFFF,
        AlternateRole   = 0x10000000,
        Stretch         = 0x20000000,
        Reverse         = 0x40000000,
        EOL             = InvalidRole
    };
    Q_ENUM(ButtonRole)

    enum ButtonLayout {
        // keep this in sync with QDialogButtonBox::ButtonLayout
        UnknownLayout = -1,
        WinLayout,
        MacLayout,
        KdeLayout,
        GnomeLayout,
        AndroidLayout
    };
    Q_ENUM(ButtonLayout)

    QPlatformDialogHelper();
    ~QPlatformDialogHelper();

    virtual QVariant styleHint(StyleHint hint) const;

    virtual void exec() = 0;
    virtual bool show(Qt::WindowFlags windowFlags,
                          Qt::WindowModality windowModality,
                          QWindow *parent) = 0;
    virtual void hide() = 0;

    static QVariant defaultStyleHint(QPlatformDialogHelper::StyleHint hint);

    static const int *buttonLayout(Qt::Orientation orientation = Qt::Horizontal, ButtonLayout policy = UnknownLayout);
    static ButtonRole buttonRole(StandardButton button);

Q_SIGNALS:
    void accept();
    void reject();
};

QT_END_NAMESPACE
QT_DECL_METATYPE_EXTERN_TAGGED(QPlatformDialogHelper::StandardButton,
                               QPlatformDialogHelper__StandardButton, Q_GUI_EXPORT)
QT_DECL_METATYPE_EXTERN_TAGGED(QPlatformDialogHelper::ButtonRole,
                               QPlatformDialogHelper__ButtonRole, Q_GUI_EXPORT)
QT_BEGIN_NAMESPACE

class Q_GUI_EXPORT QColorDialogOptions
{
    Q_GADGET
    Q_DISABLE_COPY(QColorDialogOptions)
protected:
    explicit QColorDialogOptions(QColorDialogOptionsPrivate *dd);
    ~QColorDialogOptions();
public:
    enum ColorDialogOption {
        ShowAlphaChannel    = 0x00000001,
        NoButtons           = 0x00000002,
        DontUseNativeDialog = 0x00000004,
        NoEyeDropperButton  = 0x00000008
    };

    Q_DECLARE_FLAGS(ColorDialogOptions, ColorDialogOption)
    Q_FLAG(ColorDialogOptions)

    static QSharedPointer<QColorDialogOptions> create();
    QSharedPointer<QColorDialogOptions> clone() const;

    QString windowTitle() const;
    void setWindowTitle(const QString &);

    void setOption(ColorDialogOption option, bool on = true);
    bool testOption(ColorDialogOption option) const;
    void setOptions(ColorDialogOptions options);
    ColorDialogOptions options() const;

    static int customColorCount();
    static QRgb customColor(int index);
    static QRgb *customColors();
    static void setCustomColor(int index, QRgb color);

    static QRgb *standardColors();
    static QRgb standardColor(int index);
    static void setStandardColor(int index, QRgb color);

private:
    QColorDialogOptionsPrivate *d;
};

class Q_GUI_EXPORT QPlatformColorDialogHelper : public QPlatformDialogHelper
{
    Q_OBJECT
public:
    const QSharedPointer<QColorDialogOptions> &options() const;
    void setOptions(const QSharedPointer<QColorDialogOptions> &options);

    virtual void setCurrentColor(const QColor &) = 0;
    virtual QColor currentColor() const = 0;

Q_SIGNALS:
    void currentColorChanged(const QColor &color);
    void colorSelected(const QColor &color);

private:
    QSharedPointer<QColorDialogOptions> m_options;
};

class Q_GUI_EXPORT QFontDialogOptions
{
    Q_GADGET
    Q_DISABLE_COPY(QFontDialogOptions)
protected:
    explicit QFontDialogOptions(QFontDialogOptionsPrivate *dd);
    ~QFontDialogOptions();

public:
    enum FontDialogOption {
        NoButtons           = 0x00000001,
        DontUseNativeDialog = 0x00000002,
        ScalableFonts       = 0x00000004,
        NonScalableFonts    = 0x00000008,
        MonospacedFonts     = 0x00000010,
        ProportionalFonts   = 0x00000020
    };

    Q_DECLARE_FLAGS(FontDialogOptions, FontDialogOption)
    Q_FLAG(FontDialogOptions)

    static QSharedPointer<QFontDialogOptions> create();
    QSharedPointer<QFontDialogOptions> clone() const;

    QString windowTitle() const;
    void setWindowTitle(const QString &);

    void setOption(FontDialogOption option, bool on = true);
    bool testOption(FontDialogOption option) const;
    void setOptions(FontDialogOptions options);
    FontDialogOptions options() const;

private:
    QFontDialogOptionsPrivate *d;
};

class Q_GUI_EXPORT QPlatformFontDialogHelper : public QPlatformDialogHelper
{
    Q_OBJECT
public:
    virtual void setCurrentFont(const QFont &) = 0;
    virtual QFont currentFont() const = 0;

    const QSharedPointer<QFontDialogOptions> &options() const;
    void setOptions(const QSharedPointer<QFontDialogOptions> &options);

Q_SIGNALS:
    void currentFontChanged(const QFont &font);
    void fontSelected(const QFont &font);

private:
    QSharedPointer<QFontDialogOptions> m_options;
};

class Q_GUI_EXPORT QFileDialogOptions
{
    Q_GADGET
    Q_DISABLE_COPY(QFileDialogOptions)
protected:
    QFileDialogOptions(QFileDialogOptionsPrivate *dd);
    ~QFileDialogOptions();

public:
    enum ViewMode { Detail, List };
    Q_ENUM(ViewMode)

    enum FileMode { AnyFile, ExistingFile, Directory, ExistingFiles, DirectoryOnly };
    Q_ENUM(FileMode)

    enum AcceptMode { AcceptOpen, AcceptSave };
    Q_ENUM(AcceptMode)

    enum DialogLabel { LookIn, FileName, FileType, Accept, Reject, DialogLabelCount };
    Q_ENUM(DialogLabel)

    // keep this in sync with QFileDialog::Options
    enum FileDialogOption
    {
        ShowDirsOnly                = 0x00000001,
        DontResolveSymlinks         = 0x00000002,
        DontConfirmOverwrite        = 0x00000004,
        DontUseNativeDialog         = 0x00000008,
        ReadOnly                    = 0x00000010,
        HideNameFilterDetails       = 0x00000020,
        DontUseCustomDirectoryIcons = 0x00000040
    };
    Q_DECLARE_FLAGS(FileDialogOptions, FileDialogOption)
    Q_FLAG(FileDialogOptions)

    static QSharedPointer<QFileDialogOptions> create();
    QSharedPointer<QFileDialogOptions> clone() const;

    QString windowTitle() const;
    void setWindowTitle(const QString &);

    void setOption(FileDialogOption option, bool on = true);
    bool testOption(FileDialogOption option) const;
    void setOptions(FileDialogOptions options);
    FileDialogOptions options() const;

    QDir::Filters filter() const;
    void setFilter(QDir::Filters filters);

    void setViewMode(ViewMode mode);
    ViewMode viewMode() const;

    void setFileMode(FileMode mode);
    FileMode fileMode() const;

    void setAcceptMode(AcceptMode mode);
    AcceptMode acceptMode() const;

    void setSidebarUrls(const QList<QUrl> &urls);
    QList<QUrl> sidebarUrls() const;

    bool useDefaultNameFilters() const;
    void setUseDefaultNameFilters(bool d);

    void setNameFilters(const QStringList &filters);
    QStringList nameFilters() const;

    void setMimeTypeFilters(const QStringList &filters);
    QStringList mimeTypeFilters() const;

    void setDefaultSuffix(const QString &suffix);
    QString defaultSuffix() const;

    void setHistory(const QStringList &paths);
    QStringList history() const;

    void setLabelText(DialogLabel label, const QString &text);
    QString labelText(DialogLabel label) const;
    bool isLabelExplicitlySet(DialogLabel label);

    QUrl initialDirectory() const;
    void setInitialDirectory(const QUrl &);

    QString initiallySelectedMimeTypeFilter() const;
    void setInitiallySelectedMimeTypeFilter(const QString &);

    QString initiallySelectedNameFilter() const;
    void setInitiallySelectedNameFilter(const QString &);

    QList<QUrl> initiallySelectedFiles() const;
    void setInitiallySelectedFiles(const QList<QUrl> &);

    void setSupportedSchemes(const QStringList &schemes);
    QStringList supportedSchemes() const;

    static QString defaultNameFilterString();

private:
    QFileDialogOptionsPrivate *d;
};

class Q_GUI_EXPORT QPlatformFileDialogHelper : public QPlatformDialogHelper
{
    Q_OBJECT
public:
    virtual bool defaultNameFilterDisables() const = 0;
    virtual void setDirectory(const QUrl &directory) = 0;
    virtual QUrl directory() const = 0;
    virtual void selectFile(const QUrl &filename) = 0;
    virtual QList<QUrl> selectedFiles() const = 0;
    virtual void setFilter() = 0;
    virtual void selectMimeTypeFilter(const QString &filter);
    virtual void selectNameFilter(const QString &filter) = 0;
    virtual QString selectedMimeTypeFilter() const;
    virtual QString selectedNameFilter() const = 0;

    virtual bool isSupportedUrl(const QUrl &url) const;

    const QSharedPointer<QFileDialogOptions> &options() const;
    void setOptions(const QSharedPointer<QFileDialogOptions> &options);

    static QStringList cleanFilterList(const QString &filter);
    static const char filterRegExp[];

Q_SIGNALS:
    void fileSelected(const QUrl &file);
    void filesSelected(const QList<QUrl> &files);
    void currentChanged(const QUrl &path);
    void directoryEntered(const QUrl &directory);
    void filterSelected(const QString &filter);

private:
    QSharedPointer<QFileDialogOptions> m_options;
};

class Q_GUI_EXPORT QMessageDialogOptions
{
    Q_GADGET
    Q_DISABLE_COPY(QMessageDialogOptions)
protected:
    QMessageDialogOptions(QMessageDialogOptionsPrivate *dd);
    ~QMessageDialogOptions();

public:
    // Keep in sync with QMessageBox Option
    enum class Option {
        DontUseNativeDialog = 0x00000001,
    };
    Q_DECLARE_FLAGS(Options, Option);
    Q_FLAG(Options);

    // Keep in sync with QMessageBox::Icon
    enum StandardIcon { NoIcon, Information, Warning, Critical, Question };
    Q_ENUM(StandardIcon)

    static QSharedPointer<QMessageDialogOptions> create();
    QSharedPointer<QMessageDialogOptions> clone() const;

    QString windowTitle() const;
    void setWindowTitle(const QString &);

    void setStandardIcon(StandardIcon icon);
    StandardIcon standardIcon() const;

    void setIconPixmap(const QPixmap &pixmap);
    QPixmap iconPixmap() const;

    void setText(const QString &text);
    QString text() const;

    void setInformativeText(const QString &text);
    QString informativeText() const;

    void setDetailedText(const QString &text);
    QString detailedText() const;

    void setOption(Option option, bool on = true);
    bool testOption(Option option) const;
    void setOptions(Options options);
    Options options() const;

    void setStandardButtons(QPlatformDialogHelper::StandardButtons buttons);
    QPlatformDialogHelper::StandardButtons standardButtons() const;

    struct CustomButton {
        explicit CustomButton(
                int id = -1, const QString &label = QString(),
                QPlatformDialogHelper::ButtonRole role = QPlatformDialogHelper::InvalidRole,
                void *button = nullptr) :
            label(label), role(role), id(id), button(button)
        {}

        QString label;
        QPlatformDialogHelper::ButtonRole role;
        int id;
        void *button; // strictly internal use only
    };

    int addButton(const QString &label, QPlatformDialogHelper::ButtonRole role,
                  void *buttonImpl = nullptr, int buttonId = 0);
    void removeButton(int id);
    const QList<CustomButton> &customButtons();
    const CustomButton *customButton(int id);
    void clearCustomButtons();

    void setCheckBox(const QString &label, Qt::CheckState state);
    QString checkBoxLabel() const;
    Qt::CheckState checkBoxState() const;

    void setEscapeButton(int id);
    int escapeButton() const;

    void setDefaultButton(int id);
    int defaultButton() const;

private:
    QMessageDialogOptionsPrivate *d;
};

class Q_GUI_EXPORT QPlatformMessageDialogHelper : public QPlatformDialogHelper
{
    Q_OBJECT
public:
    const QSharedPointer<QMessageDialogOptions> &options() const;
    void setOptions(const QSharedPointer<QMessageDialogOptions> &options);

Q_SIGNALS:
    void clicked(QPlatformDialogHelper::StandardButton button, QPlatformDialogHelper::ButtonRole role);
    void checkBoxStateChanged(Qt::CheckState state);

private:
    QSharedPointer<QMessageDialogOptions> m_options;
};

QT_END_NAMESPACE

#endif // QPLATFORMDIALOGHELPER_H