Source: kfilemetainfo.h


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/*
 *  This file is part of the KDE libraries
 *  Copyright (C) 2001-2002 Rolf Magnus 
 *  Copyright (C) 2001-2002 Carsten Pfeiffer 
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Library General Public
 *  License as published by the Free Software Foundation version 2.0.
 *
 *  This library is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  Library General Public License for more details.
 *
 *  You should have received a copy of the GNU Library General Public License
 *  along with this library; see the file COPYING.LIB.  If not, write to
 *  the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 *  Boston, MA 02111-1307, USA.
 *
 *  $Id: kfilemetainfo_h.html 149726 2002-04-16 07:39:43Z dfaure $
 */
#ifndef KILEMETAINFO_H
#define KILEMETAINFO_H

#include 
#include 
#include 
#include 

class QValidator;
class KFilePlugin;
class KFileMetaInfoGroup;

class KFileMimeTypeInfo
{
    friend class KFilePlugin;
    friend class KFileMetaInfoProvider;

public:
    KFileMimeTypeInfo() {}
    /**
     * This enum is used to specify some attributes that an item can have,
     * which fit neither in the @ref Hint nor in the @ref Unit enum.
     *
     * @li @p Addable     The item or group can be added by a user
     * @li @p Removable   It can be removed
     * @li @p Modifiable  Its value can be edited (no meaning for a group)
     * @li @p Cummulative If an application wants to display information for
     *                    more than one file, it may add up the values for this
     *                    item (e.g. play time of an mp3 file)
     * @li @p Averaged    Similar to Cummulative, but the average should be
     *                    calculated instead of the sum
     **/
    enum Attributes
    {
        Addable     =  1,
        Removable   =  2,
        Modifiable  =  4,
        Cummulative =  8,
        Averaged    = 16
    };

    /**
     * This enum is mainly for items that have a special meaning for some
     * applications.
     *
     * @li @p NoHint      No hint
     * @li @p Name        The name or title of the document
     * @li @p Author      The one who created the contents of it
     * @li @p Description Some information about the document
     * @li @p Width       A width in pixels
     * @li @p Height      A height in pixels
     * @li @p Bitrate     For media files
     * @li @p Length      The length of the file, also for media files
     * @li @p Hidden      The item is usually not shown to the user
     * @li @p Thumbnail   The item is a thumbnail of the file
     **/
    enum Hint {
        NoHint      = 0,
        Name        = 1,
        Author      = 2,
        Description = 3,
        Width       = 4,
        Height      = 5,
        Size        = 6,
        Bitrate     = 7,
        Length      = 8,
        Hidden      = 9,
        Thumbnail   = 10
    };

    /**
     * This enum exists so that you can specify units for items, which you
     * can usually use for integer items, so an application knows how to
     * display it (e.g. a time in seconds in a hh:mm:ss form). You can either
     * use one of those units, or if you don't find one that fits, you can
     * add it yourself using a prefix and/or suffix.
     *
     * @li @p NoUnit          None of the listed units
     * @li @p Seconds         The item represents a time in seconds
     * @li @p MilliSeconds    The item represents a time in milliseconds
     * @li @p BitsPerSecond   A bit rate
     * @li @p Pixels          For resolutions
     * @li @p Inches          Sizes
     * @li @p Centimeters     Sizes
     * @li @p Bytes           Some data/file size in bytes
     * @li @p FramesPerSecond A frame rate
     **/
    enum Unit {
        NoUnit          = 0,
        Seconds         = 1,
        MilliSeconds    = 2,
        BitsPerSecond   = 3,
        Pixels          = 4,
        Inches          = 5,
        Centimeters     = 6,
        Bytes           = 7,
        FramesPerSecond = 8
    };


    class ItemInfo;

    class GroupInfo
    {

    friend class KFilePlugin;
    friend class KFileMimeTypeInfo;
    public:
        /**
         * Use this method to get a list of keys in the specified group that
         * the plugin knows about. No variable keys.
         * For a group that doesn't support variable keys, all keys that this
         * group may have are returned. For a group that does support them, the
         * non-variable ones are returned. See @ref KFileMetaInfo about variable
         * keys
         *
         * @return the list of keys supported for this mimetype
         **/
        QStringList supportedKeys() const
        {
            return m_supportedKeys;
        }

        /**
         * Use this method to get the name of the group. This string  doesn't
         * depend on the user's locale settings
         *
         * @return the group name
         */
        const QString& name() const
        {
            return m_name;
        }

        /**
         *  Use this method to get the string to display to the user as group
         *  name. This may be different to @ref name() and it returns the
         *  name in the user's language
         *
         *  @return the translated group name
         */
        const QString& translatedName() const
        {
            return m_translatedName;
        }

       /**
        *  A group object can contains sevaral item objects (of which you can
        *  get the names with @ref supportedKeys() . With this method, you can
        *  get one of those item objects. See @ref ItemInfo
        *
        *  @return a pointer to the item info. Don't delete this object!
        */
        const ItemInfo * itemInfo( const QString& key ) const;

       /**
        *  Get the attributes of this group (see @ref Attributes)
        *
        *  @return the attributes
        */
        uint attributes() const
        {
            return m_attr;
        }

        /**
         * @return true if this group supports adding or removing arbitrary
         * keys, false if not.
         **/
        bool supportsVariableKeys() const
        {
            return m_variableItemInfo;
        }

        /**
         * If the group supports variable keys, you can query their item
         * info with this method. The main reason for this is that you can
         * get the type and attributes of variable keys.
         *
         *  @return a pointer to the item info. Don't delete this object!
         **/
        const ItemInfo* variableItemInfo( ) const
        {
            return m_variableItemInfo;
        }

    private:
        /** @Internal */
        GroupInfo( const QString& name, const QString& translatedName);

        /** @Internal */
        KFileMimeTypeInfo::ItemInfo* addItemInfo( const QString& key, const QString& translatedKey,
                          QVariant::Type type);

        /** @Internal */
        void addVariableInfo( QVariant::Type type, uint attr );

        QString         m_name;
        QString         m_translatedName;
        QStringList     m_supportedKeys;
        uint            m_attr;
        ItemInfo*       m_variableItemInfo;
        QDict m_itemDict;

    };

    class ItemInfo
    {
    friend class KFilePlugin;
    friend class GroupInfo;
    public:
        /** @Internal */
        ItemInfo() {}

        /**
         * 
         * This method returns a translated prefix to be displayed before the
         * value. Think e.g. of the $ in $30
         *
         * @return the prefix
         */
        const QString& prefix() const
        {
            return m_prefix;
        }

        /**
         * This method returns a translated suffix to be displayed after the
         * value. Think of the kbps in 128kbps
         *
         * @return the prefix
         */
        const QString& suffix() const
        {
            return m_suffix;
        }

        /**
         * The items for a file are stored as a @ref QVariant and this method
         * can be used to get the data type of this item. 
         *
         * @return the @ref QVariant type
         */
        QVariant::Type type() const
        {
            return m_type;
        }

        /**
         * The name of the item
         *
         * @return the @ref name
         */
        const QString& key() const
        {
            return m_key;
        }

        /**
         * Is this item the variable item?
         *
         * @return true if it is, false if not
         */
        bool isVariableItem() const
        {
            return key().isNull();
        }

        /**
         * @return a translation of the key for displaying to the user. If the
         * plugin provides translation to the key, it's also in the user's
         * language.
         */
        const QString& translatedKey() const
        {
            return m_translatedKey;
        }

        uint attributes() const
        {
            return m_attr;
        }

        uint hint() const
        {
            return m_hint;
        }

        uint unit() const
        {
            return m_unit;
        }

    private:
        /** @Internal */
        ItemInfo(const QString& key, const QString& translatedKey,
                 QVariant::Type type)
            : m_key(key), m_translatedKey(translatedKey),
              m_type(type),
              m_attr(0), m_unit(NoUnit), m_hint(NoHint),
              m_prefix(QString::null), m_suffix(QString::null)
        {
        }

        QString           m_key;
        QString           m_translatedKey;
        QVariant::Type    m_type;
        uint              m_attr;
        uint              m_unit;
        uint              m_hint;
        QString           m_prefix;
        QString           m_suffix;
    };

    ~KFileMimeTypeInfo();

    /**
     * Creates a validator for this item. Make sure to supply a proper
     * parent argument or delete the validator yourself.
     */
    QValidator * createValidator(const QString& group, const QString& key,
                                 QObject *parent = 0, const char *name = 0) const;


    QStringList supportedGroups() const;

    QStringList translatedGroups() const;

    QStringList preferredGroups() const
    {
        return m_preferredGroups;
    }

    QString mimeType()  const {return m_mimeType;}

    const GroupInfo * groupInfo( const QString& group ) const;
    // or rather QValueList& groupInfo()?

    // Seem both ok. Let's take the first (or just both)

    // always returning stringlists which the user has to iterate and use them
    // to look up the real items sounds strange to me. I think we should add
    // our own iterators some time (somewhere in the future ;)

    QStringList supportedKeys() const;
    QStringList preferredKeys() const
    {
        return m_preferredKeys;
    }

    GroupInfo * addGroupInfo( const QString& name,
                              const QString& translatedName);

    QString         m_translatedName;
    QStringList     m_supportedKeys;
    uint            m_attr;
    //        bool            m_supportsVariableKeys : 1;
    QDict m_itemDict;


protected:
    KFileMimeTypeInfo( const QString& mimeType );

    QDict m_groups;
    QString     m_mimeType;
    QStringList m_preferredKeys;   // same as KFileMetaInfoProvider::preferredKeys()
    QStringList m_preferredGroups; // same as KFileMetaInfoProvider::preferredKeys()
};


/**
 * This is one item of the meta information about a file (see
 * @ref KFileMetaInfo).
 * The groups, hints and units are not yet supported, but already added to
 * the interface so that adding support doesn't break compatibility later.
 */

class KFileMetaInfoItem
{
public:
    class Data;
    typedef KFileMimeTypeInfo::Hint Hint;
    typedef KFileMimeTypeInfo::Unit Unit;
    typedef KFileMimeTypeInfo::Attributes Attributes;

    /**
     * You usually don't need to use this constructor yourself. Let
     * KFileMetaInfo do it for you.
     **/
    KFileMetaInfoItem( const KFileMimeTypeInfo::ItemInfo* mti,
                       const QString& key, const QVariant& value);

    /**
     * Copy onstructor
     **/
    KFileMetaInfoItem( const KFileMetaInfoItem & item );

    /**
     * The assignment operator, so you can do:
     * 
     *    KFileMetaInfoItem item = info.item("Title");
     * 
* * This will create a shared copy of the object. The actual data * is automatically deleted if all copies go out of scope **/ const KFileMetaInfoItem& operator= (const KFileMetaInfoItem & item ); /** * Default constructor. This creates an "invalid" item */ KFileMetaInfoItem(); ~KFileMetaInfoItem(); /** * @return the key of this item */ QString key() const; /** * @return a translation of the key for displaying to the user. If the * plugin provides translation to the key, it's also in the user's language */ QString translatedKey() const; /** * @return the value of the item. */ const QVariant& value() const; /** * @return a string containing the value, if possible. If not, * QString::null is returned. * if @p mangle is true, the string will already contain prefix and * suffix */ QString string( bool mangle = true ) const; /** * changes the value of the item */ bool setValue( const QVariant& value ); /** * convenience method. It does the same as value()->type() */ QVariant::Type type() const; /** * @return true if the item's value can be changed, false if not */ bool isEditable() const; /** * @return true if the item was removed, false if not */ bool isRemoved() const; /** * @return true if the item contains changes that have not yet been written * back into the file. Removing an item counts as a change */ bool isModified() const; /** * @return a translated prefix to be displayed before the value. * Think e.g. of the $ in $30 */ QString prefix() const; /** * @return a translated suffix to be displayed after the value. * Think of the kbps in 128kbps */ QString suffix() const; /** * @return the hint for this item. See @ref Hint **/ uint hint() const; /** * @return the unit for this item. See @ref Unit **/ uint unit() const; uint attributes() const; /** * @return true if the item is valid, i.e. if it contains data, false * if it's invalid (created with the default constructor and not been * assigned anything), or if KFileMetaInfo::item() didn't find your * requested item) */ bool isValid() const; friend QDataStream& operator >>(QDataStream& s, KFileMetaInfoItem& ); friend QDataStream& operator >>(QDataStream& s, KFileMetaInfoGroup& ); friend QDataStream& operator <<(QDataStream& s, const KFileMetaInfoItem& ); friend class KFileMetaInfoGroup; protected: void setAdded(); void ref(); void deref(); Data *d; }; class KFileMetaInfoGroup { friend class KFilePlugin; friend class KFileMetaInfo; friend QDataStream& operator >>(QDataStream& s, KFileMetaInfoGroup& ); friend QDataStream& operator <<(QDataStream& s, const KFileMetaInfoGroup& ); public: class Data; KFileMetaInfoGroup( const QString& name, const KFileMimeTypeInfo* info ); KFileMetaInfoGroup( const KFileMetaInfoGroup& original ); KFileMetaInfoGroup(); ~KFileMetaInfoGroup(); const KFileMetaInfoGroup& operator= (const KFileMetaInfoGroup& info ); bool isValid() const; bool isEmpty() const; /** * operator for convenience. It does the same as @ref item(), * but you cannot specify a group to search in */ KFileMetaInfoItem operator[]( const QString& key ) const { return item( key ); } /** * This method searches for the specified item. * * @return the specified item if found, an invalid item, if not **/ KFileMetaInfoItem item( const QString& key ) const; /** * @return the item with the specified hint **/ KFileMetaInfoItem item( uint hint ) const; /** * Convenience function. Returns the value of the specified key. * It does the same as item(key).value() */ const QVariant value( const QString& key ) const { const KFileMetaInfoItem &i = item( key ); return i.value(); } QStringList supportedKeys() const; bool supportsVariableKeys() const; /** * @return whether an item for this key exists. */ bool contains( const QString& key ) const; /** * @return all keys, but in the order they were inserted. **/ QStringList keys() const; QStringList preferredKeys() const; /** * @return the list of possible types that the value for the specified key * can be. You can use this to determine the possible types for new * keys before you add them. * **/ // ### do we really want to support that? // let's not waste time on thinking about it. Let's just kick it for now // and add it in 4.0 if needed ;) // const QMemArray& types( const QString& key ) const; /** * add an item to the info. This is only possible if the specified key * is in the supportedKeys list and not yet defined or if * the group supports variable keys. **/ KFileMetaInfoItem addItem( const QString& key ); /** * remove this item from the meta info of the file. You cannot query * KFileMetaInfo for a removed object, but you can query for a list of * removed items with @ref removedItems() if you need to. * If you re-add it, its value will be cleared */ bool removeItem(const QString& key); QStringList removedItems(); QString name() const; uint attributes() const; protected: void setAdded(); KFileMetaInfoItem appendItem( const QString& key, const QVariant& value); Data* d; void ref(); void deref(); }; /////////////////////////////////////////////////////////////////// /////////////////////////////////////////////////////////////////// /** * * This is the class for objects that hold meta information about a file. * The information is kept in form of a system of key/value pairs. See also * @ref KFileMetaInfoItem. * This information is retrieved from the file through a plugin system, and * this class is the main interface to it. * If you want to write your own plugin, have a look at @ref KFilePlugin. * There are basically two different kinds of meta information: Fixed ones * that the plugin knows about (e.g. an mp3 id3v1 tag has a well defined * fixed list of fields), and variable keys that exist in mimetypes that * support their own key/value system (comments in png files are of this type). * Almost every file has fixed keys, but some also have variable keys. * * The groups and the What enum are not yet supported, but already added to * the interface so that adding support doesn't break compatibility. */ class KFileMetaInfo { public: typedef KFileMimeTypeInfo::Hint Hint; typedef KFileMimeTypeInfo::Unit Unit; typedef KFileMimeTypeInfo::Attributes Attributes; class Data; /** * This is used to specify what a KFileMetaInfo object should read, so * you can specify if you want to read "expensive" items or not. * * @li @p Fastest do the fastest possible read and omit all items that might need a significantly longer time than the others * @li @p Everything read everything, even if it might take a while * @li @p DontCare let the plugin decide what to read * @li @p TechnicalInfo extract technical details about the file, like * e.g. play time, resolution or a compression type * @li @p ContentInfo read information about the content of the file, * like comments or id3 tags * @li @p ExtendedAttr read filesystem based extended attributes if they * are supported for the filesystem * @li @p Thumbnail only read the file's thumbnail, if it contains * one * @li @p Preferred get at least the preferred items **/ enum What { Fastest = 0x1, DontCare = 0x2, TechnicalInfo = 0x4, ContentInfo = 0x8, ExtenedAttr = 0x10, Thumbnail = 0x20, Preferred = 0x40, Everything = 0xffff // all bits 1 (this also makes sure the enum is // at least 16bit, so there is more space for // new values) }; /** * The constructor. * * creating a KFileMetaInfo item through this will autoload the plugin * belonging to the mimetype and try to get meta information about * the specified file. * * If no info is available, you'll get an empty (not invalid) object. * You can test for it with the @ref isEmpty() method. * * @param path The file name. This must be the path to a local file. * @param mimeType The name of the file's mimetype. If ommited, the * mimetype is autodetected * @param what one or more of the @p What enum values. It gives some * hint to the plugin what information is desired. The plugin * may still return more items. * **/ KFileMetaInfo( const QString& path, const QString& mimeType = QString::null, uint what = Fastest); /** * Default constructor. This will create an invalid object (see * @ref isValid(). **/ KFileMetaInfo(); /** * Copy constructor **/ KFileMetaInfo( const KFileMetaInfo& original); ~KFileMetaInfo(); /** * The assignment operator, so you can do e.g.: *
     *    KFileMetaInfo info;
     *    if (something) info = KFileMetaInfo("/the/file");
     * 
* * This will create a shared copy of the object. The actual data * is automatically deleted if all copies go out of scope **/ const KFileMetaInfo& operator= (const KFileMetaInfo& info ); /** * @return all keys groups that the file has. */ QStringList groups() const; QStringList supportedGroups() const; QStringList preferredGroups() const; QStringList preferredKeys() const; QStringList supportedKeys() const; /** * @return the list of groups that you can add or remove from the file. */ QStringList editableGroups() const; // I'd like to keep those for lookup without group, at least the hint // version KFileMetaInfoItem item(const QString& key) const; KFileMetaInfoItem item(const KFileMetaInfoItem::Hint hint) const; KFileMetaInfoItem saveItem( const QString& key, const QString& preferredGroup = QString::null, bool createGroup = true ); KFileMetaInfoGroup group(const QString& key) const; KFileMetaInfoGroup operator[] (const QString& key) const { return group(key); } /** * Try to add the specified group. This will only succeed if it is * in the list of @ref editableGroups(). Note that all non-variable * items that belong to this group are automatically added as empty * item. */ bool addGroup( const QString& name ); /** * remove the specified group. This will only succeed if it is * in the list of @ref editableGroups(). Beware that this also * removes all the items in that group, so always ask the user * before removing it! */ bool removeGroup( const QString& name ); QStringList removedGroups(); /** * This method writes all pending changes of the meta info back to the file. * If any items are marked as removed, they are really removed from the * list. The info object as well as all items are updated. * @return true if successful, false if not */ bool applyChanges(); /** * @return whether an item for this key exists. */ bool contains( const QString& key ) const; /** * @return whether a group with this name exists. */ bool containsGroup( const QString& key ) const; const QVariant value( const QString& key ) const { return item(key).value(); } /** * @return true if the item is valid, i.e. if actually represents the info * about a file, false if the object is uninitialized */ bool isValid() const; /** * @return false if the object contains data, true if it's empty. You'll * get an empty object if no plugin for the file could be found. */ bool isEmpty() const; QString mimeType() const; QString path() const; friend QDataStream& operator >>(QDataStream& s, KFileMetaInfo& ); friend QDataStream& operator <<(QDataStream& s, const KFileMetaInfo& ); friend class KFilePlugin; protected: KFileMetaInfoGroup appendGroup(const QString& name); /** * @return a pointer to the plugin that belogs to this object's mimetype. * It will be auto-loaded if it's currently not loaded **/ KFilePlugin * const plugin() const; void ref(); void deref(); Data* d; private: KFileMetaInfoItem findEditableItem( KFileMetaInfoGroup& group, const QString& key ); }; /////////////////////////////////////////////////////////////////// /////////////////////////////////////////////////////////////////// /** * Baseclass for a meta info plugin. If you want to write your own plugin, * you need to derive from this class. * * In your plugin, you need to create a factory for the KFilePlugin * * Example: *
 * typedef KGenericFactory MyFactory;
 * K_EXPORT_COMPONENT_FACTORY(kfile_foo, MyFactory("kfile_foo"));
 *  
* * and then just overwrite the methods your plugin supports. If your plugin * can only read data, it is sufficient to only write a @ref readInfo() method. * If you also want to support changing data and writing it back into the * file, you usually need all methods. **/ class KFilePlugin : public QObject { Q_OBJECT public: KFilePlugin( QObject *parent, const char *name, const QStringList& args ); virtual ~KFilePlugin(); /** * Read the info from the file in this method and insert it into the * provided @ref KFileMetaInfo object. You can get the path to * the file with info.path() **/ virtual bool readInfo( KFileMetaInfo& info, uint what = KFileMetaInfo::Fastest ) = 0; /** * Similar to the above method, but for writing the info back to the file. * If you don't have any writable keys, don't implement this method **/ virtual bool writeInfo( const KFileMetaInfo& /*info*/ ) const { return true; } /** * This method should create an appropriate validator for the specified * item if it's editable or return a null pointer if not. If you don't * have any editable items, you don't need this method **/ virtual QValidator* createValidator( const QString& /* mimeType */, const QString& /* group */, const QString& /* key */, QObject* /*parent*/, const char* /*name*/) const { return 0; } protected: KFileMimeTypeInfo::GroupInfo* addGroupInfo(KFileMimeTypeInfo* info, const QString& key, const QString& translatedKey) const; void setAttributes(KFileMimeTypeInfo::GroupInfo* gi, uint attr) const; void addVariableInfo(KFileMimeTypeInfo::GroupInfo* gi, QVariant::Type type, uint attr) const; KFileMimeTypeInfo::ItemInfo* addItemInfo(KFileMimeTypeInfo::GroupInfo* gi, const QString& key, const QString& translatedKey, QVariant::Type type); void setAttributes(KFileMimeTypeInfo::ItemInfo* item, uint attr); void setHint(KFileMimeTypeInfo::ItemInfo* item, uint hint); void setUnit(KFileMimeTypeInfo::ItemInfo* item, uint unit); void setPrefix(KFileMimeTypeInfo::ItemInfo* item, const QString& prefix); void setSuffix(KFileMimeTypeInfo::ItemInfo* item, const QString& suffix); KFileMetaInfoGroup appendGroup(KFileMetaInfo& info, const QString& key); void appendItem(KFileMetaInfoGroup& group, const QString& key, QVariant value); /** * Call this in your constructor */ // ### do we need this, if it only calls the provider? // IMHO the Plugin shouldn't call its provider. KFileMimeTypeInfo * addMimeTypeInfo( const QString& mimeType ); QStringList m_preferredKeys; QStringList m_preferredGroups; protected: virtual void virtual_hook( int id, void* data ); private: class KFilePluginPrivate; KFilePluginPrivate *d; }; /////////////////////////////////////////////////////////////////// /////////////////////////////////////////////////////////////////// /** * @Internal * * Synchronous access to metadata of a local file. Ususally, you don't want * to use this class. Use @ref KFileMetaInfo directly. **/ class KFileMetaInfoProvider: QObject { friend class KFilePlugin; Q_OBJECT public: virtual ~KFileMetaInfoProvider(); static KFileMetaInfoProvider * self(); /** * @return a pointer to the plugin that belongs to the specified mimetype, * which means also load the plugin if it's not in memory */ KFilePlugin * plugin( const QString& mimeType ); const KFileMimeTypeInfo * mimeTypeInfo( const QString& mimeType ); QStringList preferredKeys( const QString& mimeType ) const; QStringList preferredGroups( const QString& mimeType ) const; protected: KFileMetaInfoProvider(); QDict m_plugins; QDict m_mimeTypeDict; private: static KFileMetaInfoProvider * s_self; KFileMimeTypeInfo * addMimeTypeInfo( const QString& mimeType ); class KFileMetaInfoProviderPrivate; KFileMetaInfoProviderPrivate *d; }; QDataStream& operator <<(QDataStream& s, const KFileMetaInfoItem& ); QDataStream& operator >>(QDataStream& s, KFileMetaInfoItem& ); QDataStream& operator <<(QDataStream& s, const KFileMetaInfoGroup& ); QDataStream& operator >>(QDataStream& s, KFileMetaInfoGroup& ); QDataStream& operator <<(QDataStream& s, const KFileMetaInfo& ); QDataStream& operator >>(QDataStream& s, KFileMetaInfo& ); #endif // KILEMETAINFO_H

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