Fix key handling bug 1268

1 files changed, 34 insertions, 45 deletions

diff --git a/noncore/comm/keypebble/krfbdecoder.cpp b/noncore/comm/keypebble/krfbdecoder.cpp
index 2c9ad71..db95154 100644
--- a/noncore/comm/keypebble/krfbdecoder.cpp
+++ b/noncore/comm/keypebble/krfbdecoder.cpp
@@ -1,841 +1,830 @@
 #include "krfbconnection.h"
 #include "krfbserverinfo.h"
 #include "krfbdecoder.h"
 #include "krfbbuffer.h"
 
 
 #include <qpixmap.h>
 
 #include <assert.h>
 
 //
 // Endian stuff
 //
 #ifndef KDE_USE_FINAL
 const int endianTest = 1;
 #endif
 
 #define Swap16IfLE(s) \
     (*(char *)&endianTest ? ((((s) & 0xff) << 8) | (((s) >> 8) & 0xff)) : (s))
 
 #define Swap32IfLE(l) \
     (*(char *)&endianTest ? ((((l) & 0xff000000) >> 24) | \
                              (((l) & 0x00ff0000) >> 8)  | \
                              (((l) & 0x0000ff00) << 8)  | \
                              (((l) & 0x000000ff) << 24))  : (l))
 
 //
 // The lengths of the messages we need to wait for
 //
 const int ServerInitLength = 24;
 const int UpdateHeaderLength = 4;
 const int RectHeaderLength = 12;
 const int RectChunkSize = 4;
 const int CopyRectPosLength = 4;
 const int ServerCutLenLength = 7;
 
 //
 // Client -> Server Message Identifiers
 //
 static CARD8 SetPixelFormatId = 0;
 //static CARD8 FixColourMapEntriesId = 1; // Not used
 static CARD8 SetEncodingsId = 2;
 static CARD8 UpdateRequestId = 3;
 static CARD8 KeyEventId = 4;
 static CARD8 PointerEventId = 5;
 static CARD8 ClientCutTextId = 6;
 
 //
 // Server -> Client Message Identifiers
 //
 static CARD8 UpdateId = 0;
 static CARD8 BellId = 2;
 static CARD8 ServerCutId = 3;
 
 //
 // Encoding identifiers
 //
 static CARD32 RawEncoding = Swap32IfLE( 0 );
 static CARD32 CopyRectEncoding = Swap32IfLE(1 );
 static CARD32 RreEncoding = Swap32IfLE( 2 );
 static CARD32 CorreEncoding = Swap32IfLE( 4 );
 static CARD32 HexTileEncoding = Swap32IfLE( 5 );
 
 static struct {
     int keysym;
     int keycode;
 } keyMap[] = {
     { 0xff08, Qt::Key_Backspace },
     { 0xff09, Qt::Key_Tab       },
     { 0xff0d, Qt::Key_Return    },
     { 0xff1b, Qt::Key_Escape    },
     { 0xff63, Qt::Key_Insert    },
     { 0xffff, Qt::Key_Delete    },
     { 0xff50, Qt::Key_Home      },
     { 0xff57, Qt::Key_End       },
     { 0xff55, Qt::Key_Prior     },
     { 0xff56, Qt::Key_Next      },
     { 0xff51, Qt::Key_Left      },
     { 0xff52, Qt::Key_Up        },
     { 0xff53, Qt::Key_Right     },
     { 0xff54, Qt::Key_Down      },
     { 0xffbe, Qt::Key_F1        },
     { 0xffbf, Qt::Key_F2        },
     { 0xffc0, Qt::Key_F3        },
     { 0xffc1, Qt::Key_F4        },
     { 0xffc2, Qt::Key_F5        },
     { 0xffc3, Qt::Key_F6        },
     { 0xffc4, Qt::Key_F7        },
     { 0xffc5, Qt::Key_F8        },
     { 0xffc6, Qt::Key_F9        },
     { 0xffc7, Qt::Key_F10       },
     { 0xffc8, Qt::Key_F11       },
     { 0xffc9, Qt::Key_F12       },
     { 0xffe1, Qt::Key_Shift     },
     { 0xffe2, Qt::Key_Shift     },
     { 0xffe3, Qt::Key_Control   },
     { 0xffe4, Qt::Key_Control   },
     { 0xffe7, Qt::Key_Meta      },
     { 0xffe8, Qt::Key_Meta      },
     { 0xffe9, Qt::Key_Alt       },
     { 0xffea, Qt::Key_Alt       },
     { 0, 0 }
 };
 
 
 KRFBDecoder::KRFBDecoder( KRFBConnection *con )
   : QObject( con, "RFB Decoder" )
 {
   assert( con );
   assert( con->state() == KRFBConnection::Connected );
 
   this->con = con;
   this->buf = 0;
   this->info = 0;
   this->format = 0;
   this->buttonMask = 0;
   currentState = Idle;
 }
 
 KRFBDecoder::~KRFBDecoder()
 {
   if ( info )
     delete info;
   if ( format )
     delete format;
 }
 
 void KRFBDecoder::start()
 {
   sendClientInit();
 }
 
 void KRFBDecoder::sendClientInit()
 {
   con->write( &( con->options()->shared ), 1 );
 
   // Wait for server init
   qWarning( "Waiting for server init" );
 
   static QString statusMsg = tr( "Waiting for server initialization..." );
   emit status( statusMsg );
 
   currentState = AwaitingServerInit;
   connect( con, SIGNAL( gotEnoughData() ), SLOT( gotServerInit() ) );
   con->waitForData( ServerInitLength );
 }
 
 void KRFBDecoder::gotServerInit()
 {
   qWarning( "Got server init" );
   disconnect( con, SIGNAL( gotEnoughData() ), this, SLOT( gotServerInit() ) );
 
   if ( info )
     delete info;
   info = new KRFBServerInfo;
   CHECK_PTR( info );
 
   con->read( &(info->width), 2 );
   info->width = Swap16IfLE( info->width );
   con->read( &info->height, 2 );
   info->height = Swap16IfLE( info->height );
 
   con->read( &(info->bpp), 1 );
   con->read( &(info->depth), 1 );
   con->read( &(info->bigEndian), 1 );
   con->read( &(info->trueColor), 1 );
 
   con->read( &(info->redMax), 2 );
   info->redMax = Swap16IfLE( info->redMax );
   con->read( &(info->greenMax), 2 );
   info->greenMax = Swap16IfLE( info->greenMax );
   con->read( &(info->blueMax), 2 );
   info->blueMax = Swap16IfLE( info->blueMax );
 
   con->read( &(info->redShift), 1 );
   con->read( &(info->greenShift), 1 );
   con->read( &(info->blueShift), 1 );
 
   con->read( info->padding, 3 );
 
   con->read( &(info->nameLength), 4 );
   info->nameLength = Swap32IfLE( info->nameLength );
 
   qWarning( "Width = %d, Height = %d", info->width, info->height );
   qWarning( "Bpp = %d, Depth = %d, Big = %d, True = %d",
            info->bpp, info->depth, info->bigEndian, info->trueColor );
   qWarning( "RedMax = %d, GreenMax = %d, BlueMax = %d",
            info->redMax, info->greenMax, info->blueMax );
   qWarning( "RedShift = %d, GreenShift = %d, BlueShift = %d",
            info->redShift, info->greenShift,info-> blueShift );
 
   buf->resize( info->width/con->options()->scaleFactor, info->height /con->options()->scaleFactor);
 
   // Wait for desktop name
   qWarning( "Waiting for desktop name" );
 
   static QString statusMsg = tr( "Waiting for desktop name..." );
   emit status( statusMsg );
 
   currentState = AwaitingDesktopName;
   connect( con, SIGNAL( gotEnoughData() ), SLOT( gotDesktopName() ) );
   con->waitForData( info->nameLength );
 }
 
 void KRFBDecoder::gotDesktopName()
 {
   assert( info );
   assert( currentState == AwaitingDesktopName );
 
   qWarning( "Got desktop name" );
 
-  disconnect( con, SIGNAL( gotEnoughData() ), 
+  disconnect( con, SIGNAL( gotEnoughData() ),
               this, SLOT( gotDesktopName() ) );
 
   char *buf = new char[ info->nameLength + 1 ];
   CHECK_PTR( buf );
 
   con->read( buf, info->nameLength );
   buf[ info->nameLength ] = '\0';
   info->name = buf;
 
   qWarning( "Desktop: %s", info->name.latin1() );
 
   delete buf;
 
   // Get the format we'll really use and tell the server
   decidePixelFormat();
   sendPixelFormat();
   sendAllowedEncodings();
   currentState = Idle;
 
   QString msg;
   msg = tr( "Connected to %1" );
   msg = msg.arg( info->name );
   emit status( msg );
 
   sendUpdateRequest( false );
 }
 
 void KRFBDecoder::decidePixelFormat()
 {
   assert( info );
 
   if ( format )
     delete format;
   format = new KRFBPixelFormat;
   CHECK_PTR( format );
 
   // What depth do we want?
   //
   // We'll use the minimum of the remote and local depths, UNLESS an
   // eight bit session has been specifically requested by the user.
   int screenDepth = QPixmap::defaultDepth();
   int bestDepth = ( screenDepth > info->depth ) ? info->depth : screenDepth;
   int chosenDepth;
 
   if ( con->options()->colors256 )
     chosenDepth = 8;
   else
     chosenDepth = bestDepth;
 
   qWarning( "Screen depth=%d, server depth=%d, best depth=%d, " \
            "eight bit %d, chosenDepth=%d",
            screenDepth,
            info->depth,
-           bestDepth, 
+           bestDepth,
            con->options()->colors256, chosenDepth );
 
   format->depth = chosenDepth;
 
   // If we're using the servers native depth
   if ( chosenDepth == info->depth ) {
     // Use the servers native format
     format->bpp = info->bpp;
     //    format->bigEndian = info->bigEndian;
     format->bigEndian = true;
     format->trueColor = info->trueColor;
     format->redMax = info->redMax;
     format->greenMax = info->greenMax;
     format->blueMax = info->blueMax;
     format->redShift = info->redShift;
     format->greenShift = info->greenShift;
     format->blueShift = info->blueShift;
   }
   else {
     if ( chosenDepth == 8 ) {
       format->bpp = 8;
       format->bigEndian = true;
       format->trueColor = true;
       format->redMax = 7;
       format->greenMax = 7;
       format->blueMax = 3;
       format->redShift = 0;
       format->greenShift = 3;
       format->blueShift = 6;
     }
   }
 
   format->redMax = Swap16IfLE( format->redMax );
   format->greenMax = Swap16IfLE( format->greenMax );
   format->blueMax = Swap16IfLE( format->blueMax );
 }
 
 void KRFBDecoder::sendPixelFormat()
 {
   static char padding[3];
   con->write( &SetPixelFormatId, 1 );
   con->write( padding, 3 );
 
   con->write( &(format->bpp), 1 );
   con->write( &(format->depth), 1 );
   con->write( &(format->bigEndian), 1 );
   con->write( &(format->trueColor), 1 );
 
   con->write( &(format->redMax), 2 );
   con->write( &(format->greenMax), 2 );
   con->write( &(format->blueMax), 2 );
 
   con->write( &(format->redShift), 1 );
   con->write( &(format->greenShift), 1 );
   con->write( &(format->blueShift), 1 );
   con->write( format->padding, 3 ); // Padding
 }
 
 void KRFBDecoder::sendAllowedEncodings()
 {
   static CARD8 padding[1];
   con->write( &SetEncodingsId, 1 );
   con->write( padding, 1 );
 
   CARD16 noEncodings = con->options()->encodings();
   noEncodings = Swap16IfLE( noEncodings );
   con->write( &noEncodings, 2 );
 
   if ( con->options()->corre )
     con->write( &CorreEncoding, 4 );
   if ( con->options()->hexTile )
     con->write( &HexTileEncoding, 4 );
   if ( con->options()->rre )
     con->write( &RreEncoding, 4 );
   if ( con->options()->copyrect )
     con->write( &CopyRectEncoding, 4 );
   // We always support this
   con->write( &RawEncoding, 4 );
 }
 
 void KRFBDecoder::sendUpdateRequest( bool incremental )
 {
   if ( currentState != Idle )
     return;
 
   con->write( &UpdateRequestId, 1 );
   con->write( &incremental, 1 );
 
   static CARD16 x = 0, y = 0;
   static CARD16 w = Swap16IfLE( info->width );
   static CARD16 h = Swap16IfLE( info->height );
 
   con->write( &x, 2 );
   con->write( &y, 2 );
   con->write( &w, 2 );
   con->write( &h, 2 );
 
   // Now wait for the update
   currentState = AwaitingUpdate;
   connect( con, SIGNAL( gotEnoughData() ), SLOT( gotUpdateHeader() ) );
   con->waitForData( UpdateHeaderLength );
 }
 
 void KRFBDecoder::gotUpdateHeader()
 {
   assert( currentState == AwaitingUpdate );
 
   //  qWarning( "Got update header" );
 
-  disconnect( con, SIGNAL( gotEnoughData() ), 
+  disconnect( con, SIGNAL( gotEnoughData() ),
               this, SLOT( gotUpdateHeader() ) );
 
   CARD8 msgType;
   con->read( &msgType, 1 );
 
   if ( msgType != UpdateId ) {
     // We might have a bell or server cut
     if ( msgType == ServerCutId ) {
       oldState = currentState;
       gotServerCut();
     }
     else if ( msgType == BellId ) {
       oldState = currentState;
       gotBell();
     }
     else {
       int msg = msgType;
       QString protocolError = tr( "Protocol Error: Message Id %1 was "
                                     "found when expecting an update "
                                     "message." ).arg( msg );
       currentState = Error;
       emit error( protocolError );
     }
-    return;    
+    return;
   }
 
   CARD8 padding;
   con->read( &padding, 1 );
 
   con->read( &noRects, 2 );
   noRects = Swap16IfLE( noRects );
 
   //  qWarning( "Expecting %d rects", noRects );
 
   // Now wait for the data
   currentState = AwaitingRectHeader;
   connect( con, SIGNAL( gotEnoughData() ), SLOT( gotRectHeader() ) );
   con->waitForData( RectHeaderLength );
 }
 
 void KRFBDecoder::gotRectHeader()
 {
   assert( currentState == AwaitingRectHeader );
 
   //  qWarning( "Got rect header" );
 
-  disconnect( con, SIGNAL( gotEnoughData() ), 
+  disconnect( con, SIGNAL( gotEnoughData() ),
               this, SLOT( gotRectHeader() ) );
 
   con->read( &x, 2 );
   x = Swap16IfLE( x );
   con->read( &y, 2 );
   y = Swap16IfLE( y );
 
   con->read( &w, 2 );
   w = Swap16IfLE( w );
   con->read( &h, 2 );
   h = Swap16IfLE( h );
 
   con->read( &encoding, 4 );
 
   //  CARD32 encodingLocal = Swap32IfLE( encoding );
-  //  qWarning( "Rect: x=%d, y= %d, w=%d, h=%d, encoding=%ld", 
+  //  qWarning( "Rect: x=%d, y= %d, w=%d, h=%d, encoding=%ld",
           //   x, y, w, h, encodingLocal );
 
   //
   // Each encoding needs to be handled differently. Some require
   // waiting for more data, but others like a copyrect do not.
   // Our constants have already been byte swapped, so we use
   // the remote value as is.
   //
   if ( encoding == RawEncoding ) {
       //    qWarning( "Raw encoding" );
     handleRawRect();
   }
   else if ( encoding == CopyRectEncoding ) {
 //    qWarning( "CopyRect encoding" );
     handleCopyRect();
   }
   else if ( encoding == RreEncoding ) {
     qWarning( "RRE encoding" );
     handleRRERect();
   }
   else if ( encoding == CorreEncoding ) {
     qWarning( "CoRRE encoding" );
     handleCoRRERect();
   }
   else if ( encoding == HexTileEncoding ) {
     qWarning( "HexTile encoding" );
     handleHexTileRect();
   }
   else {
     int msg = Swap32IfLE( encoding );
     QString protocolError = tr( "Protocol Error: An unknown encoding was "
                                   "used by the server %1" ).arg( msg );
     currentState = Error;
     qWarning( "Unknown encoding, %d", msg );
     emit error( protocolError );
     return;
   }
 }
 
 //
 // Raw Encoding
 //
 
 void KRFBDecoder::handleRawRect()
 {
   // We need something a bit cleverer here to handle large
   // rectanges nicely. The chunking should be based on the
   // overall size (but has to be in complete lines).
 
     //  qWarning( "Handling a raw rect chunk" );
 
     //  CARD32 lineCount = w * format->bpp / 8;
 
   if ( h > RectChunkSize ) {
     //    if ( con->sock->size() / lineCount ) {
     //      getRawRectChunk( con->sock->size() / lineCount );
     //    }
     //    else {
       getRawRectChunk( RectChunkSize );
       //   }
   }
   else {
     getRawRectChunk( h );
   }
 }
 
 void KRFBDecoder::getRawRectChunk( int lines )
 {
   this->lines = lines;
   CARD32 count = lines * w * format->bpp / 8;
 
   // Wait for server init
   //  qWarning( "Waiting for raw rect chunk, %ld", count );
 
   currentState = AwaitingRawRectChunk;
   connect( con, SIGNAL( gotEnoughData() ), SLOT( gotRawRectChunk() ) );
   con->waitForData( count );
 }
 
 void KRFBDecoder::gotRawRectChunk()
 {
   assert( currentState == AwaitingRawRectChunk );
 
-  disconnect( con, SIGNAL( gotEnoughData() ), 
+  disconnect( con, SIGNAL( gotEnoughData() ),
               this, SLOT( gotRawRectChunk() ) );
 
   //  qWarning( "Got raw rect chunk" );
 
   //
   // Read the rect data and copy it to the buffer.
   //
-  
+
   // TODO: Replace this!
   int count = lines * w * format->bpp / 8;
   char *hack = new char[ count ];
   con->read( hack, count );
   buf->drawRawRectChunk( hack, x, y, w, lines );
   delete hack;
   // /TODO:
 
   h = h - lines;
   y = y + lines;
 
   if ( h > 0 ) {
     handleRawRect();
   }
   else {
     noRects--;
 
     //    qWarning( "There are %d rects left", noRects );
 
     if ( noRects ) {
       currentState = AwaitingRectHeader;
       connect( con, SIGNAL( gotEnoughData() ), SLOT( gotRectHeader() ) );
       con->waitForData( RectHeaderLength );
     }
     else {
       // we are now ready for the next update - no need to wait for the timer
       currentState = Idle;
       sendUpdateRequest (1);
     }
   }
 }
 
 //
 // Copy Rectangle Encoding
 //
 
 void KRFBDecoder::handleCopyRect()
 {
   currentState = AwaitingCopyRectPos;
   connect( con, SIGNAL( gotEnoughData() ), SLOT( gotCopyRectPos() ) );
   con->waitForData( CopyRectPosLength );
 }
 
 void KRFBDecoder::gotCopyRectPos()
 {
   disconnect( con, SIGNAL( gotEnoughData() ),
               this, SLOT( gotCopyRectPos() ) );
 
   CARD16 srcX;
   CARD16 srcY;
 
   con->read( &srcX, 2 );
   con->read( &srcY, 2 );
 
   srcX = Swap16IfLE( srcX );
   srcY = Swap16IfLE( srcY );
 
   buf->copyRect( srcX, srcY, x, y, w, h );
 
   noRects--;
 
   //    qWarning( "There are %d rects left", noRects );
 
   if ( noRects ) {
     currentState = AwaitingRectHeader;
     connect( con, SIGNAL( gotEnoughData() ), SLOT( gotRectHeader() ) );
     con->waitForData( RectHeaderLength );
   }
   else
     currentState = Idle;
 }
 
 void KRFBDecoder::handleRRERect()
 {
   qWarning( "RRE not implemented" );
 }
 
 void KRFBDecoder::handleCoRRERect()
 {
   qWarning( "CoRRE not implemented" );
 }
 
 void KRFBDecoder::handleHexTileRect()
 {
   qWarning( "HexTile not implemented" );
 }
 
 void KRFBDecoder::sendMouseEvent( QMouseEvent *e )
 {
   // Deal with the buttons
   if ( e->type() != QEvent::MouseMove ) {
     buttonMask = 0;
     if ( e->type() == QEvent::MouseButtonPress ) {
       if ( e->button() & LeftButton )
         buttonMask |= 0x01;
       if ( e->button() & MidButton )
         buttonMask |= 0x04;
       if ( e->button() & RightButton )
         buttonMask |= 0x02;
     }
     else if ( e->type() == QEvent::MouseButtonRelease ) {
       if ( e->button() & LeftButton )
         buttonMask &= 0x06;
       if ( e->button() & MidButton )
         buttonMask |= 0x03;
       if ( e->button() & RightButton )
         buttonMask |= 0x05;
     }
   }
 
         // HACK: Scaling
   CARD16 x = Swap16IfLE( e->x() * con->options()->scaleFactor );
           CARD16 y = Swap16IfLE( e->y() *con->options()->scaleFactor );
 
   con->write( &PointerEventId, 1 );
   con->write( &buttonMask, 1 );
   con->write( &x, 2 );
   con->write( &y, 2 );
 }
 
 
 void KRFBDecoder::sendCutEvent( const QString &unicode )
 {
   //
   // Warning: There is a bug in the RFB protocol because there is no way to find
   // out the codepage in use on the remote machine. This could be fixed by requiring
   // the remote server to use utf8 etc. but for now we have to assume they're the
   // same. I've reported this problem to the ORL guys, but they apparantly have no
   // immediate plans to fix the issue. :-( (rich)
   //
 
   CARD8 padding[3];
   QCString text = unicode.local8Bit();
   CARD32 length = text.length();
   length = Swap32IfLE( length );
 
   con->write( &ClientCutTextId, 1 );
   con->write( &padding, 3 );
   con->write( &length, 4 );
   con->write( text.data(), length );
 }
 
 void KRFBDecoder::gotServerCut()
 {
   qWarning( "Got server cut" );
 
   currentState = AwaitingServerCutLength;
   connect( con, SIGNAL( gotEnoughData() ), SLOT( gotServerCutLength() ) );
   con->waitForData( ServerCutLenLength );
 }
 
 void KRFBDecoder::gotServerCutLength()
 {
   assert( currentState = AwaitingServerCutLength );
   disconnect( con, SIGNAL( gotEnoughData() ),
               this, SLOT( gotServerCutLength() ) );
 
   CARD8 padding[3];
   con->read( padding, 3 );
 
   con->read( &serverCutTextLen, 4 );
   serverCutTextLen = Swap32IfLE( serverCutTextLen );
 
   currentState = AwaitingServerCutText;
   connect( con, SIGNAL( gotEnoughData() ), SLOT( gotServerCutText() ) );
   con->waitForData( serverCutTextLen );
 }
 
 void KRFBDecoder::gotServerCutText()
 {
   assert( currentState = AwaitingServerCutText );
 
   disconnect( con, SIGNAL( gotEnoughData() ),
               this, SLOT( gotServerCutText() ) );
 
 
   //
   // Warning: There is a bug in the RFB protocol because there is no way to find
   // out the codepage in use on the remote machine. This could be fixed by requiring
   // the remote server to use utf8 etc. but for now we have to assume they're the
   // same. I've reported this problem to the ORL guys, but they apparantly have no
   // immediate plans to fix the issue. :-( (rich)
   //
 
   char *cutbuf = new char[ serverCutTextLen + 1 ];
   CHECK_PTR( cutbuf );
 
   con->read( cutbuf, serverCutTextLen );
   cutbuf[ serverCutTextLen ] = '\0';
 
   /* For some reason QApplication::clipboard()->setText() segfaults when called
-   * from within keypebble's mass of signals and slots 
+   * from within keypebble's mass of signals and slots
   qWarning( "Server cut: %s", cutbuf );
 
   QString cutText( cutbuf ); // DANGER!!
   qApp->clipboard()->setText( cutText );
   */
 
   delete cutbuf;
   // Now wait for the update (again)
   if ( oldState == AwaitingUpdate ) {
     currentState = AwaitingUpdate;
     connect( con, SIGNAL( gotEnoughData() ), SLOT( gotUpdateHeader() ) );
     con->waitForData( UpdateHeaderLength );
   }
   else if ( oldState == Idle ) {
     currentState = Idle;
   }
   else {
     qWarning( "Async handled in weird state" );
     currentState = oldState;
   };
 }
 
 void KRFBDecoder::gotBell()
 {
   qWarning( "Got server bell" );
   buf->soundBell();
 
   // Now wait for the update (again)
   if ( oldState == AwaitingUpdate ) {
     currentState = AwaitingUpdate;
     connect( con, SIGNAL( gotEnoughData() ), SLOT( gotUpdateHeader() ) );
     con->waitForData( UpdateHeaderLength );
   }
   else if ( oldState == Idle ) {
     currentState = Idle;
   }
   else {
     qWarning( "Async handled in weird state" );
     currentState = oldState;
   };
 }
 
 void KRFBDecoder::sendKeyPressEvent( QKeyEvent *event )
 {
   int key;
   key = toKeySym( event );
   if ( key ) {
     key = Swap32IfLE( key );
 
     CARD8 mask = true;
 
     CARD16 padding = 0;
     con->write( &KeyEventId, 1 );
     con->write( &mask, 1 );
     con->write( &padding, 2 );
     con->write( &key, 4 );
   }
 }
 
 void KRFBDecoder::sendKeyReleaseEvent( QKeyEvent *event )
 {
   int key;
   key = toKeySym( event );
   if ( key ) {
     key = Swap32IfLE( key );
 
     CARD8 mask = false;
 
     CARD16 padding = 0;
     con->write( &KeyEventId, 1 );
     con->write( &mask, 1 );
     con->write( &padding, 2 );
     con->write( &key, 4 );
   }
 }
 
 
+
+
+//
+// The RFB protocol spec says 'For most ordinary keys, the 'keysym'
+// is the same as the corresponding ASCII value.', but doesn't
+// elaborate what the most ordinary keys are.  The spec also lists
+// a set (possibly subset, it's unspecified) of mappings for
+// "other common keys" (backspace, tab, return, escape, etc).
+//
 int KRFBDecoder::toKeySym( QKeyEvent *k )
 {
-  int ke = 0;
-
-  ke = k->ascii();
-  // Markus: Crappy hack. I dont know why lower case letters are
-  // not defined in qkeydefs.h. The key() for e.g. 'l' == 'L'. 
-  // This sucks. :-(
-
-  if ( (ke == 'a') || (ke == 'b') || (ke == 'c') || (ke == 'd') 
-       || (ke == 'e') || (ke == 'f') || (ke == 'g') || (ke == 'h')
-       || (ke == 'i') || (ke == 'j') || (ke == 'k') || (ke == 'l')
-       || (ke == 'm') || (ke == 'n') || (ke == 'o') || (ke == 'p')
-       || (ke == 'q') || (ke == 'r') || (ke == 's') || (ke == 't')
-       || (ke == 'u') || (ke == 'v') ||( ke == 'w') || (ke == 'x')
-       || (ke == 'y') || (ke == 'z') ) {
-    ke = k->key();
-    ke = ke + 0x20;
-    return ke;
-  }
 
-  // qkeydefs = xkeydefs! :-)
-  if ( ( k->key() >= 0x0a0 ) && k->key() <= 0x0ff )
-      return k->key();
-
-  if ( ( k->key() >= 0x20 ) && ( k->key() <= 0x7e ) )
-    return k->key();
-  
-  // qkeydefs != xkeydefs! :-(
-  // This is gonna suck :-(
-
-  int i = 0;
-  while ( keyMap[i].keycode ) {
-    if ( k->key() == keyMap[i].keycode )
-        return keyMap[i].keysym;
-    i++;
-  }
+    //
+    // Try and map these "other common keys" first.
+    //
+    if ((k->key() >= Qt::Key_Escape) && (k->key() <= Qt::Key_F12)) {
+        for(int i = 0; keyMap[i].keycode != 0; i++) {
+            if (k->key() == keyMap[i].keycode) {
+                return keyMap[i].keysym;
+            }
+        }
+    }
 
-  return 0;
+    //
+    // If these keys aren't matched, return the ascii code and let the
+    // server figure it out.  We don't return k->key(), as the data in
+    // key differs between input methods, and we don't want special cases.
+    //
+    return k->ascii();
 }
-