qwscommand_qws_p.h

奇趣公司比较新的qt/emd版本

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#ifndef QWSCOMMAND_QWS_P_H
#define QWSCOMMAND_QWS_P_H

//
//  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.
//

// When reading commands "off the wire" in the server, the rawLen is read
// and then that many bytes are allocated.  If the rawLen is corrupted (or
// the protocol is being attacked) too many bytes can be allocated.  Set
// a hard limit here for security.
#define MAX_COMMAND_SIZE (16 * 1024)

#include <QtCore/qbytearray.h>
#include <QtGui/qwsutils_qws.h>
#include <QtGui/qfont.h>
#include <QtCore/qdatastream.h>
#include <QtCore/qvariant.h>
#include <QtCore/qrect.h>
#include <QtGui/qregion.h>
#include <QtCore/qvector.h>
#include <QtCore/qvarlengtharray.h>
#include <QtGui/qwsevent_qws.h>
#include "qwsprotocolitem_qws.h"

QT_MODULE(Gui)

#define QTE_PIPE "QtEmbedded-%1"

class QRect;

/*********************************************************************
 *
 * Functions to read/write commands on/from a socket
 *
 *********************************************************************/
#ifndef QT_NO_QWS_MULTIPROCESS
void qws_write_command(QIODevice *socket, int type, char *simpleData, int simpleLen, char *rawData, int rawLen);
bool qws_read_command(QIODevice *socket, char *&simpleData, int &simpleLen, char *&rawData, int &rawLen, int &bytesRead);
#endif

struct QWSCommand : QWSProtocolItem
{
    QWSCommand(int t, int len, char *ptr) : QWSProtocolItem(t,len,ptr) {}

    enum Type {
        Unknown = 0,
        Create,
        Shutdown,
        Region,
        RegionMove,
        RegionDestroy,
        SetProperty,
        AddProperty,
        RemoveProperty,
        GetProperty,
        SetSelectionOwner,
        ConvertSelection,
        RequestFocus,
        ChangeAltitude,
        SetOpacity,
        DefineCursor,
        SelectCursor,
        PositionCursor,
        GrabMouse,
        PlaySound,
        QCopRegisterChannel,
        QCopSend,
        RegionName,
        Identify,
        GrabKeyboard,
        RepaintRegion,
        IMMouse,
        IMUpdate,
        IMResponse,
        Embed,
        Font
    };
    static QWSCommand *factory(int type);
};

const char *qws_getCommandTypeString( QWSCommand::Type tp );

#ifndef QT_NO_DEBUG
class QDebug;
QDebug &operator<<(QDebug &dbg, QWSCommand::Type tp);
#endif // QT_NO_DEBUG

/*********************************************************************
 *
 * Commands
 *
 *********************************************************************/

struct QWSIdentifyCommand : public QWSCommand
{
    QWSIdentifyCommand() :
        QWSCommand(QWSCommand::Identify,
                   sizeof(simpleData), reinterpret_cast<char *>(&simpleData))
    {
        simpleData.idLen = 0;
        simpleData.idLock = -1;
    }

    void setData(const char *d, int len, bool allocateMem) {
        QWSCommand::setData(d, len, allocateMem);
        if ( simpleData.idLen > MAX_COMMAND_SIZE )
        {
            qWarning( "Identify command - name length %d - too big!", simpleData.idLen );
            simpleData.idLen = MAX_COMMAND_SIZE;
        }
        if ( simpleData.idLen * int(sizeof(QChar)) > len )
        {
            qWarning( "Identify command - name length %d - buffer size %d - buffer overrun!", simpleData.idLen, len );
        }
        else
        {
            id = QString(reinterpret_cast<const QChar*>(d), simpleData.idLen);
        }
    }

    void setId(const QString& i, int lock)
    {
        id = i;
        simpleData.idLen = id.length();
        simpleData.idLock = lock;
        setData(reinterpret_cast<const char*>(id.unicode()), simpleData.idLen*2, true);
    }

    struct SimpleData {
        int idLen;
        int idLock;
    } simpleData;
    QString id;
};

struct QWSCreateCommand : public QWSCommand
{
    QWSCreateCommand(int n = 1) :
        QWSCommand(QWSCommand::Create, sizeof(count),
                   reinterpret_cast<char *>(&count)), count(n) {}
    int count;
};

struct QWSRegionNameCommand : public QWSCommand
{
    QWSRegionNameCommand() :
        QWSCommand(QWSCommand::RegionName,
                    sizeof(simpleData), reinterpret_cast<char *>(&simpleData)) {}

    void setData(const char *d, int len, bool allocateMem) {
        QWSCommand::setData(d, len, allocateMem);
        if ( simpleData.nameLen > MAX_COMMAND_SIZE )
        {
            qWarning( "region name command - name length too big!" );
            simpleData.nameLen = MAX_COMMAND_SIZE;
        }
        if ( simpleData.captionLen > MAX_COMMAND_SIZE )
        {
            qWarning( "region name command - caption length too big!" );
            simpleData.captionLen = MAX_COMMAND_SIZE;
        }
        if ( simpleData.nameLen + simpleData.captionLen > len )
        {
            qWarning( "region name command - name length %d - caption length %d - buffer size %d - buffer overrun!",
                      simpleData.nameLen, simpleData.captionLen, len );

        }
        else
        {
            name = QString(reinterpret_cast<const QChar*>(d), simpleData.nameLen/2);
            d += simpleData.nameLen;
            caption = QString(reinterpret_cast<const QChar*>(d), simpleData.captionLen/2);
        }
    }

    void setName(const QString& n, const QString &c)
    {
        name = n;
        caption = c;
        int l = simpleData.nameLen = name.length()*2;
        l += simpleData.captionLen = caption.length()*2;
        char *d = new char[l];
        memcpy(d, name.unicode(), simpleData.nameLen);
        memcpy(d+simpleData.nameLen, caption.unicode(), simpleData.captionLen);
        setData(d, l, true);
        delete[] d;
    }

    struct SimpleData {
        int windowid;
        int nameLen;
        int captionLen;
    } simpleData;
    QString name;
    QString caption;
};

struct QWSRegionCommand : public QWSCommand
{
    QWSRegionCommand() :
        QWSCommand(QWSCommand::Region, sizeof(simpleData),
                    reinterpret_cast<char*>(&simpleData)) {}

    void setData(const char *d, int len, bool allocateMem = true) {
        QWSCommand::setData(d, len, allocateMem);

        if( simpleData.nrectangles * int(sizeof(QRect)) + simpleData.surfacekeylength * int(sizeof(QChar)) + simpleData.surfacedatalength * int(sizeof(char)) > len )
        {
            qWarning( "region command - rectangle count %d - surface key length %d - region data size %d - buffer size %d - buffer overrun!",
                      simpleData.nrectangles, simpleData.surfacekeylength, simpleData.surfacedatalength, len );
        }
        else
        {
            char *ptr = rawDataPtr;

            region.setRects(reinterpret_cast<QRect*>(ptr), simpleData.nrectangles);
            ptr += simpleData.nrectangles * sizeof(QRect);

            surfaceKey = QString(reinterpret_cast<QChar*>(ptr),
                             simpleData.surfacekeylength);
            ptr += simpleData.surfacekeylength * sizeof(QChar);

            surfaceData = QByteArray(ptr, simpleData.surfacedatalength);
        }
    }

    void setData(int id, const QString &key, const QByteArray &data,
                 const QRegion &reg)
    {
        surfaceKey = key;
        surfaceData = data;
        region = reg;

        const QVector<QRect> rects = reg.rects();

        simpleData.windowid = id;
        simpleData.surfacekeylength = key.size();
        simpleData.surfacedatalength = data.size();
        simpleData.nrectangles = rects.count();

        QVarLengthArray<char, 256> buffer;
        buffer.append(reinterpret_cast<const char*>(rects.constData()),
                      rects.count() * sizeof(QRect));
        buffer.append(reinterpret_cast<const char*>(key.constData()),
                      key.size() * sizeof(QChar));
        buffer.append(data, data.size());

        QWSCommand::setData(buffer.constData(), buffer.size(), true);
    }

    /* XXX this will pad out in a compiler dependent way,
       should move nrectangles to before windowtype, and
       add reserved bytes.
       Symptom will be valgrind reported uninitialized memory usage
       */
    struct SimpleData {
        int windowid;
        int surfacekeylength;
        int surfacedatalength;
        int nrectangles;
    } simpleData;

    QString surfaceKey;
    QByteArray surfaceData;
    QRegion region;
};

struct QWSSetOpacityCommand : public QWSCommand
{
    QWSSetOpacityCommand() :
        QWSCommand(QWSCommand::SetOpacity, sizeof(simpleData),
                    reinterpret_cast<char*>(&simpleData)) {}

    struct SimpleData {
        int windowid;
        uchar opacity;
    } simpleData;
};

struct QWSRegionMoveCommand : public QWSCommand
{
    QWSRegionMoveCommand() :
        QWSCommand(QWSCommand::RegionMove, sizeof(simpleData),
                    reinterpret_cast<char*>(&simpleData)) {}

    struct SimpleData {
        int windowid;
        int dx;
        int dy;
    } simpleData;

};

struct QWSRegionDestroyCommand : public QWSCommand
{
    QWSRegionDestroyCommand() :
        QWSCommand(QWSCommand::RegionDestroy, sizeof(simpleData),
                    reinterpret_cast<char*>(&simpleData)) {}

    struct SimpleData {
        int windowid;
    } simpleData;

};

struct QWSRequestFocusCommand : public QWSCommand
{
    QWSRequestFocusCommand() :
        QWSCommand(QWSCommand::RequestFocus, sizeof(simpleData), reinterpret_cast<char*>(&simpleData)) {}

    struct SimpleData {
        int windowid;
        int flag;
    } simpleData;
};

struct QWSChangeAltitudeCommand : public QWSCommand
{
    QWSChangeAltitudeCommand() :
        QWSCommand(QWSCommand::ChangeAltitude, sizeof(simpleData), reinterpret_cast<char*>(&simpleData)) {}

    enum Altitude {
        Lower = -1,
        Raise = 0,
        StaysOnTop = 1
    };

    struct SimpleData {
        int windowid;
        Altitude altitude;
        bool fixed;
    } simpleData;

};


struct QWSAddPropertyCommand : public QWSCommand
{
    QWSAddPropertyCommand() :
        QWSCommand(QWSCommand::AddProperty, sizeof(simpleData), reinterpret_cast<char*>(&simpleData)) {}

    struct SimpleData {
        int windowid, property;
    } simpleData;

};

struct QWSSetPropertyCommand : public QWSCommand
{
    QWSSetPropertyCommand() :
        QWSCommand(QWSCommand::SetProperty, sizeof(simpleData),
                    reinterpret_cast<char*>(&simpleData)) { data = 0; }

    void setData(const char *d, int len, bool allocateMem = true) {
        QWSCommand::setData(d, len, allocateMem);
        data = rawDataPtr;
    }

    struct SimpleData {
        int windowid, property, mode;
    } simpleData;

    char *data;
};

struct QWSRepaintRegionCommand : public QWSCommand
{
    QWSRepaintRegionCommand() :
        QWSCommand(QWSCommand::RepaintRegion, sizeof(simpleData),