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Diffstat (limited to 'nxcomp/PolyText8.cpp')
| -rw-r--r-- | nxcomp/PolyText8.cpp | 298 |
1 files changed, 298 insertions, 0 deletions
diff --git a/nxcomp/PolyText8.cpp b/nxcomp/PolyText8.cpp new file mode 100644 index 000000000..15752721d --- /dev/null +++ b/nxcomp/PolyText8.cpp @@ -0,0 +1,298 @@ +/**************************************************************************/ +/* */ +/* Copyright (c) 2001, 2010 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 +} |