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/**************************************************************************/
/* */
/* Copyright (c) 2001, 2009 NoMachine, http://www.nomachine.com/. */
/* */
/* NXCOMP, NX protocol compression and NX extensions to this software */
/* are copyright of NoMachine. Redistribution and use of the present */
/* software is allowed according to terms specified in the file LICENSE */
/* which comes in the source distribution. */
/* */
/* Check http://www.nomachine.com/licensing.html for applicability. */
/* */
/* NX and NoMachine are trademarks of Medialogic S.p.A. */
/* */
/* All rights reserved. */
/* */
/**************************************************************************/
#include "PolyText8.h"
#include "ClientCache.h"
#include "EncodeBuffer.h"
#include "DecodeBuffer.h"
//
// Set the verbosity level.
//
#define PANIC
#define WARNING
#undef TEST
#undef DEBUG
#undef DUMP
//
// Here are the methods to handle messages' content.
//
int PolyText8Store::parseIdentity(Message *message, const unsigned char *buffer,
unsigned int size, int bigEndian) const
{
PolyText8Message *polyText8 = (PolyText8Message *) message;
//
// Here is the fingerprint.
//
polyText8 -> drawable = GetULONG(buffer + 4, bigEndian);
polyText8 -> gcontext = GetULONG(buffer + 8, bigEndian);
polyText8 -> x = GetUINT(buffer + 12, bigEndian);
polyText8 -> y = GetUINT(buffer + 14, bigEndian);
//
// Clean up padding bytes.
//
#ifdef DUMP
DumpData(buffer, size);
*logofs << "\n\n" << logofs_flush;
#endif
if ((int) size > dataOffset)
{
int length;
int current;
int delta;
int item;
unsigned int nitem;
unsigned char *pad = NULL;
unsigned char *end = NULL;
delta = 1;
nitem = 0;
#ifdef DUMP
*logofs << name() << " Size " << size << ".\n" << logofs_flush;
#endif
//
// Data is a list of TextItem where element
// can be a string or a font shift.
//
current = POLYTEXT8_DATA_OFFSET;
length = POLYTEXT8_DATA_OFFSET;
do
{
#ifdef DUMP
*logofs << name() << " Current " << current << ".\n" << logofs_flush;
#endif
item = GetUINT(buffer + length , bigEndian);
if (item < 255)
{
//
// Text element. Number represents
// the 'Length of string' field.
//
length += (item + delta + 1);
nitem++;
}
else if (item == 255)
{
//
// Element is a font shift.
//
length += 5;
nitem++;
}
#ifdef DUMP
*logofs << name() << " Item " << item << ".\n" << logofs_flush;
#endif
current += length;
}
while(current < (int) size && item != 0);
#ifdef DUMP
*logofs << name() << " Final length " << length << ".\n" << logofs_flush;
#endif
end = ((unsigned char *) buffer) + size;
pad = ((unsigned char *) buffer) + length;
for (; pad < end && nitem >= 1; pad++)
{
#ifdef DUMP
*logofs << name() << " Padding " << " .\n" << logofs_flush;
#endif
*pad = 0;
}
}
#ifdef DEBUG
*logofs << name() << ": Parsed Identity for message at " << this << ".\n" << logofs_flush;
#endif
return 1;
}
int PolyText8Store::unparseIdentity(const Message *message, unsigned char *buffer,
unsigned int size, int bigEndian) const
{
PolyText8Message *polyText8 = (PolyText8Message *) message;
//
// Fill all the message's fields.
//
PutULONG(polyText8 -> drawable, buffer + 4, bigEndian);
PutULONG(polyText8 -> gcontext, buffer + 8, bigEndian);
PutUINT(polyText8 -> x, buffer + 12, bigEndian);
PutUINT(polyText8 -> y, buffer + 14, bigEndian);
#ifdef DEBUG
*logofs << name() << ": Unparsed identity for message at " << this << ".\n" << logofs_flush;
#endif
return 1;
}
void PolyText8Store::dumpIdentity(const Message *message) const
{
#ifdef DUMP
PolyText8Message *polyText8 = (PolyText8Message *) message;
*logofs << name() << ": Identity drawable " << polyText8 -> drawable
<< ", gcontext " << polyText8 -> gcontext << ", x " << polyText8 -> x
<< ", y " << polyText8 -> y << ", size " << polyText8 -> size_
<< ".\n";
#endif
}
void PolyText8Store::identityChecksum(const Message *message, const unsigned char *buffer,
unsigned int size, int bigEndian) const
{
}
void PolyText8Store::updateIdentity(EncodeBuffer &encodeBuffer, const Message *message,
const Message *cachedMessage,
ChannelCache *channelCache) const
{
PolyText8Message *polyText8 = (PolyText8Message *) message;
PolyText8Message *cachedPolyText8 = (PolyText8Message *) cachedMessage;
ClientCache *clientCache = (ClientCache *) channelCache;
#ifdef TEST
*logofs << name() << ": Encoding value " << polyText8 -> drawable
<< " as " << "drawable" << " field.\n" << logofs_flush;
#endif
encodeBuffer.encodeXidValue(polyText8 -> drawable, clientCache -> drawableCache);
cachedPolyText8 -> drawable = polyText8 -> drawable;
#ifdef TEST
*logofs << name() << ": Encoding value " << polyText8 -> gcontext
<< " as " << "gcontext" << " field.\n" << logofs_flush;
#endif
encodeBuffer.encodeXidValue(polyText8 -> gcontext, clientCache -> gcCache);
cachedPolyText8 -> gcontext = polyText8 -> gcontext;
#ifdef TEST
*logofs << name() << ": Encoding value " << polyText8 -> x
<< " as " << "x" << " field.\n" << logofs_flush;
#endif
unsigned short int diff_x = polyText8 -> x - cachedPolyText8 -> x;
encodeBuffer.encodeCachedValue(diff_x, 16,
clientCache -> polyTextCacheX);
cachedPolyText8 -> x = polyText8 -> x;
#ifdef TEST
*logofs << name() << ": Encoding value " << polyText8 -> y
<< " as " << "y" << " field.\n" << logofs_flush;
#endif
unsigned short int diff_y = polyText8 -> y - cachedPolyText8 -> y;
encodeBuffer.encodeCachedValue(diff_y, 16,
clientCache -> polyTextCacheY);
cachedPolyText8 -> y = polyText8 -> y;
}
void PolyText8Store::updateIdentity(DecodeBuffer &decodeBuffer, const Message *message,
ChannelCache *channelCache) const
{
PolyText8Message *polyText8 = (PolyText8Message *) message;
ClientCache *clientCache = (ClientCache *) channelCache;
unsigned int value;
decodeBuffer.decodeXidValue(value, clientCache -> drawableCache);
polyText8 -> drawable = value;
#ifdef DEBUG
*logofs << name() << ": Decoded value " << polyText8 -> drawable
<< " as " << "drawable" << " field.\n" << logofs_flush;
#endif
decodeBuffer.decodeXidValue(value, clientCache -> gcCache);
polyText8 -> gcontext = value;
#ifdef DEBUG
*logofs << name() << ": Decoded value " << polyText8 -> gcontext
<< " as gcontext field.\n" << logofs_flush;
#endif
decodeBuffer.decodeCachedValue(value, 16,
clientCache -> polyTextCacheX);
polyText8 -> x += value;
polyText8 -> x &= 0xffff;
#ifdef DEBUG
*logofs << name() << ": Decoded value " << polyText8 -> x
<< " as x field.\n" << logofs_flush;
#endif
decodeBuffer.decodeCachedValue(value, 16,
clientCache -> polyTextCacheY);
polyText8 -> y += value;
polyText8 -> y &= 0xffff;
#ifdef DEBUG
*logofs << name() << ": Decoded value " << polyText8 -> y
<< " as y field.\n" << logofs_flush;
#endif
}
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