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C/C++ Source or Header  |  1993-02-19  |  43KB  |  1,821 lines
  1. /*
  2. **    termTextBuffer.c
  3. **
  4. **    Support routines for the text buffer.
  5. **
  6. **    Copyright © 1990-1993 by Olaf `Olsen' Barthel & MXM
  7. **        All Rights Reserved
  8. */
  9.  
  10. #include "termGlobal.h"
  11.  
  12.     /* Gadget ID codes. */
  13.  
  14. enum    {    GAD_SCROLLER,GAD_UP,GAD_DOWN };
  15.  
  16.     /* Menu ID codes. */
  17.  
  18. enum    {    MEN_SEARCH,MEN_REPEAT,MEN_GOTO,MEN_CLEARBUF_CONTENTS,MEN_CLOSEBUF,MEN_QUITBUF };
  19.  
  20.     /* Gadget ID codes. */
  21.  
  22. enum    {    GAD_STRING,GAD_LOAD,GAD_OK,GAD_CANCEL };
  23.  
  24.     /* A handy macro to determine the length of a string. */
  25.  
  26. #define LINE_WIDTH(s)    (s)[-1]
  27.  
  28.     /* The dimensions of the scroller images. */
  29.  
  30. #define ARROW_WIDTH    18
  31. #define ARROW_HEIGHT    11
  32.  
  33. STATIC struct NewMenu BufferMenu[] =
  34. {
  35.     { NM_TITLE, NULL,         0 , 0, 0, (APTR)0},
  36.     {  NM_ITEM, NULL,         0 , 0, 0, (APTR)MEN_SEARCH},
  37.     {  NM_ITEM, NULL,         0 , 0, 0, (APTR)MEN_REPEAT},
  38.     {  NM_ITEM, NM_BARLABEL,     0 , 0, 0, (APTR)0},
  39.     {  NM_ITEM, NULL,         0 , 0, 0, (APTR)MEN_GOTO},
  40.     {  NM_ITEM, NM_BARLABEL,     0 , 0, 0, (APTR)0},
  41.     {  NM_ITEM, NULL,         0 , 0, 0, (APTR)MEN_CLEARBUF_CONTENTS},
  42.     {  NM_ITEM, NULL,         0 , 0, 0, (APTR)MEN_CLOSEBUF},
  43.     {  NM_ITEM, NM_BARLABEL,     0 , 0, 0, (APTR)0},
  44.     {  NM_ITEM, NULL,         0 , 0, 0, (APTR)MEN_QUITBUF},
  45.  
  46.     { NM_END, 0,             0 , 0, 0, (APTR)0}
  47. };
  48.  
  49.     /* Some private data (render info & window). */
  50.  
  51. STATIC struct Window        *BufferWindow;
  52. STATIC struct Screen        *BufferScreen;
  53.  
  54. STATIC struct RastPort        *BPort;
  55. STATIC APTR             BufferVisualInfo;
  56.  
  57. STATIC LONG             NumBufferLines,
  58.                  NumBufferColumns,
  59.                  LastTopLine;
  60.  
  61. STATIC BYTE             BufferTerminated;
  62.  
  63. STATIC WORD             LocalTextFontWidth,
  64.                  LocalTextFontHeight,
  65.                  LocalTextFontBase;
  66.  
  67. STATIC struct TextAttr         LocalTextFont;
  68. STATIC UBYTE             LocalTextFontName[MAX_FILENAME_LENGTH];
  69.  
  70. STATIC struct TextAttr         LocalUserFont;
  71. STATIC UBYTE             LocalUserFontName[MAX_FILENAME_LENGTH];
  72.  
  73. STATIC LONG             CurrentLine,
  74.                  DisplayedLines;
  75.  
  76. STATIC struct SearchInfo    *BufferSearchInfo;
  77.  
  78. STATIC struct Gadget        *Scroller,
  79.                 *UpArrow,
  80.                 *DownArrow;
  81.  
  82. STATIC struct Image        *UpImage,
  83.                 *DownImage;
  84.  
  85. STATIC UWORD            *BufferLineWidths,
  86.                 *BufferLineOffsets,
  87.                 *BufferColumnOffsets;
  88.  
  89.     /* DeleteScroller(VOID):
  90.      *
  91.      *    Delete scroller and arrow objects.
  92.      */
  93.  
  94. STATIC VOID
  95. DeleteScroller(VOID)
  96. {
  97.     if(Scroller)
  98.     {
  99.         DisposeObject(Scroller);
  100.  
  101.         Scroller = NULL;
  102.     }
  103.  
  104.     if(UpArrow)
  105.     {
  106.         DisposeObject(UpArrow);
  107.  
  108.         UpArrow = NULL;
  109.     }
  110.  
  111.     if(DownArrow)
  112.     {
  113.         DisposeObject(DownArrow);
  114.  
  115.         DownArrow = NULL;
  116.     }
  117.  
  118.     if(UpImage)
  119.     {
  120.         DisposeObject(UpImage);
  121.  
  122.         UpImage = NULL;
  123.     }
  124.  
  125.     if(DownImage)
  126.     {
  127.         DisposeObject(DownImage);
  128.  
  129.         DownImage = NULL;
  130.     }
  131. }
  132.  
  133.     /* CreateScroller(LONG Height):
  134.      *
  135.      *    Create scroller and arrow objects.
  136.      */
  137.  
  138. STATIC BYTE __regargs
  139. CreateScroller(LONG Height)
  140. {
  141.     struct DrawInfo    *DrawInfo;
  142.     BYTE         Result = FALSE;
  143.  
  144.     if(DrawInfo = GetScreenDrawInfo(BufferScreen))
  145.     {
  146.         if(UpImage = (struct Image *)NewObject(NULL,"sysiclass",
  147.             SYSIA_Size,    SYSISIZE_MEDRES,
  148.             SYSIA_Which,    UPIMAGE,
  149.             SYSIA_DrawInfo,    DrawInfo,
  150.         TAG_DONE))
  151.         {
  152.             if(DownImage = (struct Image *)NewObject(NULL,"sysiclass",
  153.                 SYSIA_Size,    SYSISIZE_MEDRES,
  154.                 SYSIA_Which,    DOWNIMAGE,
  155.                 SYSIA_DrawInfo,    DrawInfo,
  156.             TAG_DONE))
  157.             {
  158.                 LONG ScrollerHeight,LeftEdge;
  159.  
  160.                 ScrollerHeight = Height - 2 * ARROW_HEIGHT;
  161.  
  162.                 LeftEdge = BufferScreen -> Width - ARROW_WIDTH;
  163.  
  164.                 if(Scroller = NewObject(NULL,"propgclass",
  165.                     GA_ID,        GAD_SCROLLER,
  166.  
  167.                     GA_Top,        0,
  168.                     GA_Left,    LeftEdge,
  169.                     GA_Width,    ARROW_WIDTH,
  170.                     GA_Height,    ScrollerHeight,
  171.                     GA_Immediate,    TRUE,
  172.                     GA_FollowMouse,    TRUE,
  173.                     GA_RelVerify,    TRUE,
  174.  
  175.                     PGA_Freedom,    FREEVERT,
  176.                     PGA_NewLook,    TRUE,
  177.  
  178.                     PGA_Visible,    1,
  179.                     PGA_Total,    1,
  180.                 TAG_DONE))
  181.                 {
  182.                     STATIC struct TagItem ArrowMappings[] = { GA_ID,GA_ID,TAG_END };
  183.  
  184.                     if(UpArrow = NewObject(NULL,"buttongclass",
  185.                         GA_ID,        GAD_UP,
  186.                         GA_Image,    UpImage,
  187.                         GA_Left,    LeftEdge,
  188.                         GA_Top,        ScrollerHeight,
  189.                         GA_Height,    ARROW_HEIGHT,
  190.                         GA_Width,    ARROW_WIDTH,
  191.                         GA_Immediate,    TRUE,
  192.                         GA_RelVerify,    TRUE,
  193.                         GA_Previous,    Scroller,
  194.  
  195.                         ICA_TARGET,    ICTARGET_IDCMP,
  196.                         ICA_MAP,    ArrowMappings,
  197.                     TAG_DONE))
  198.                     {
  199.                         if(DownArrow = NewObject(NULL,"buttongclass",
  200.                             GA_ID,        GAD_DOWN,
  201.                             GA_Image,    DownImage,
  202.                             GA_Left,    LeftEdge,
  203.                             GA_Top,        ScrollerHeight + ARROW_HEIGHT,
  204.                             GA_Height,    ARROW_HEIGHT,
  205.                             GA_Width,    ARROW_WIDTH,
  206.                             GA_Immediate,    TRUE,
  207.                             GA_RelVerify,    TRUE,
  208.                             GA_Previous,    UpArrow,
  209.  
  210.                             ICA_TARGET,    ICTARGET_IDCMP,
  211.                             ICA_MAP,    ArrowMappings,
  212.                         TAG_DONE))
  213.                             Result = TRUE;
  214.                     }
  215.                 }
  216.             }
  217.         }
  218.  
  219.         FreeScreenDrawInfo(BufferScreen,DrawInfo);
  220.     }
  221.  
  222.     if(!Result)
  223.         DeleteScroller();
  224.  
  225.     return(Result);
  226. }
  227.  
  228.     /* GetSearchString(STRPTR Buffer):
  229.      *
  230.      *    Prompt user for a string to search the buffer for.
  231.      */
  232.  
  233. STATIC BYTE
  234. GetSearchString(STRPTR Buffer)
  235. {
  236.     struct Gadget    *GadgetList = NULL;
  237.     struct Gadget    *GadgetArray[GAD_CANCEL + 1];
  238.     struct Window    *PanelWindow;
  239.     UBYTE         OtherBuffer[256];
  240.     BYTE         Success = FALSE;
  241.  
  242.     strcpy(OtherBuffer,Buffer);
  243.  
  244.     if(CreateAllGetsGadgets(FALSE,FALSE,0,OtherBuffer,LocaleString(MSG_TERMBUFFER_ENTER_SEARCH_STRING_TXT),GadgetArray,&GadgetList,BufferVisualInfo,BufferScreen))
  245.     {
  246.         if(PanelWindow = OpenWindowTags(NULL,
  247.             WA_Left,        (BufferScreen -> Width    - SZ_GetWindowWidth())    / 2,
  248.             WA_Top,            (BufferScreen -> Height    - SZ_GetWindowHeight())    / 2,
  249.             WA_Width,        SZ_GetWindowWidth(),
  250.             WA_Height,        SZ_GetWindowHeight(),
  251.  
  252.             WA_Activate,        TRUE,
  253.             WA_DragBar,        TRUE,
  254.             WA_DepthGadget,        TRUE,
  255.             WA_CloseGadget,        TRUE,
  256.             WA_RMBTrap,        TRUE,
  257.             WA_CustomScreen,    BufferScreen,
  258.  
  259.             WA_IDCMP,        IDCMP_ACTIVEWINDOW | IDCMP_CLOSEWINDOW | IDCMP_VANILLAKEY | IDCMP_RAWKEY | IDCMP_GADGETDOWN | BUTTONIDCMP | STRINGIDCMP,
  260.  
  261.             WA_Title,        LocaleString(MSG_TERMBUFFER_ENTER_SEARCH_STRING_TXT),
  262.         TAG_DONE))
  263.         {
  264.             struct IntuiMessage    *Massage;
  265.             ULONG             IClass,Code;
  266.             struct Gadget        *Gadget;
  267.             BYTE             Terminated = FALSE;
  268.             ULONG             SignalSet;
  269.             STRPTR             String;
  270.  
  271.             AddGList(PanelWindow,GadgetList,(UWORD)-1,(UWORD)-1,NULL);
  272.             RefreshGList(GadgetList,PanelWindow,NULL,(UWORD)-1);
  273.             GT_RefreshWindow(PanelWindow,NULL);
  274.  
  275.             ActiveGadget = NULL;
  276.  
  277.             String = SZ_GetString(GadgetArray[GAD_STRING]);
  278.  
  279.             while(!Terminated)
  280.             {
  281.                 SignalSet = Wait(PORTMASK(PanelWindow -> UserPort) | SIG_TOFRONT | SIG_KILL);
  282.  
  283.                 if(SignalSet & SIG_TOFRONT);
  284.                     BumpWindow(PanelWindow);
  285.  
  286.                 if(SignalSet & SIG_KILL)
  287.                 {
  288.                     BufferTerminated = TRUE;
  289.  
  290.                     Terminated = TRUE;
  291.                 }
  292.  
  293.                 if(SignalSet & PORTMASK(PanelWindow -> UserPort))
  294.                 {
  295.                     while(!Terminated && (Massage = (struct IntuiMessage *)GT_GetIMsg(PanelWindow -> UserPort)))
  296.                     {
  297.                         IClass    = Massage -> Class;
  298.                         Code    = Massage -> Code;
  299.                         Gadget    = (struct Gadget *)Massage -> IAddress;
  300.  
  301.                         GT_ReplyIMsg(Massage);
  302.  
  303.                         if(IClass == IDCMP_VANILLAKEY)
  304.                             KeySelect(GadgetArray,GAD_CANCEL,Code,PanelWindow,&Gadget,&IClass,&Code);
  305.  
  306.                         if(IClass == IDCMP_RAWKEY && Code == HELP_CODE)
  307.                             DisplayBeep(PanelWindow -> WScreen);
  308.  
  309.                         if(IClass == IDCMP_GADGETDOWN)
  310.                         {
  311.                             if((Gadget -> GadgetType & GTYP_GTYPEMASK) == GTYP_STRGADGET)
  312.                                 ActiveGadget = Gadget;
  313.                         }
  314.  
  315.                         if(IClass == IDCMP_ACTIVEWINDOW && ActiveGadget)
  316.                             ActivateGadget(ActiveGadget,PanelWindow,NULL);
  317.  
  318.                         if(IClass == IDCMP_CLOSEWINDOW)
  319.                             Terminated = TRUE;
  320.  
  321.                         if(IClass == IDCMP_GADGETUP)
  322.                         {
  323.                             switch(Gadget -> GadgetID)
  324.                             {
  325.                                 case GAD_OK:
  326.                                 case GAD_STRING:
  327.  
  328.                                     if(String[0])
  329.                                     {
  330.                                         strcpy(Buffer,String);
  331.  
  332.                                         Success = TRUE;
  333.                                     }
  334.  
  335.                                 case GAD_CANCEL:
  336.  
  337.                                     Terminated = TRUE;
  338.  
  339.                                     break;
  340.  
  341.                             }
  342.                         }
  343.                     }
  344.                 }
  345.             }
  346.  
  347.             RemoveGList(PanelWindow,GadgetList,(UWORD)-1);
  348.  
  349.             CloseWindow(PanelWindow);
  350.         }
  351.     }
  352.  
  353.     FreeGadgets(GadgetList);
  354.  
  355.     return(Success);
  356. }
  357.  
  358.     /* PrintLine(STRPTR Buffer,LONG LineNumber):
  359.      *
  360.      *    Print a line at a given line number in the displayed area.
  361.      */
  362.  
  363. STATIC VOID
  364. PrintLine(STRPTR Buffer,LONG LineNumber)
  365. {
  366.     WORD Length = Buffer[-1];
  367.  
  368.         /* Print the text. */
  369.  
  370.     if(Length)
  371.     {
  372.         Move(BPort,0,BufferLineOffsets[LineNumber] + LocalTextFontBase);
  373.  
  374.         if(Length > NumBufferColumns)
  375.             Text(BPort,Buffer,NumBufferColumns);
  376.         else
  377.             Text(BPort,Buffer,Length);
  378.     }
  379.  
  380.         /* The line doesn't exactly fill the displayed line,
  381.          * so erase the remaining columns.
  382.          */
  383.  
  384.     if(Length < BufferLineWidths[LineNumber])
  385.         ClipBlit(BPort,0,0,BPort,BufferColumnOffsets[Length],BufferLineOffsets[LineNumber],BufferColumnOffsets[NumBufferColumns - Length],LocalTextFontHeight,0x00);
  386.  
  387.     BufferLineWidths[LineNumber] = Length;
  388. }
  389.  
  390.     /* RedrawScreen(LONG FirstLine):
  391.      *
  392.      *    Redraw the contents of the entire screen and return the
  393.      *    number of lines actually drawn.
  394.      */
  395.  
  396. STATIC LONG
  397. RedrawScreen(LONG FirstLine)
  398. {
  399.     LONG i,Last,Line = 0,Result;
  400.  
  401.     ObtainSemaphore(BufferSemaphore);
  402.  
  403.         /* Determine last line to display. */
  404.  
  405.     if((Last = FirstLine + NumBufferLines) >= Lines)
  406.         Last = Lines;
  407.  
  408.     Result = Last - FirstLine;
  409.  
  410.     if(LastTopLine != -1)
  411.     {
  412.         LONG Delta = FirstLine - LastTopLine;
  413.  
  414.         if(ABS(Delta) < NumBufferLines)
  415.         {
  416.                 /* No change? */
  417.  
  418.             if(!Delta)
  419.             {
  420.                 ReleaseSemaphore(BufferSemaphore);
  421.  
  422.                 return(Result);
  423.             }
  424.             else
  425.             {
  426.                 LastTopLine = FirstLine;
  427.  
  428.                     /* Scrolled up? */
  429.  
  430.                 if(Delta < 0)
  431.                 {
  432.                     for(i = NumBufferLines - 1 ; i > -Delta ; i--)
  433.                         BufferLineWidths[i] = BufferLineWidths[i + Delta];
  434.  
  435.                     ClipBlit(BPort,0,0,BPort,0,BufferLineOffsets[-Delta],BufferColumnOffsets[NumBufferColumns],BufferLineOffsets[NumBufferLines + Delta],0xC0);
  436.  
  437.                     Last = FirstLine - Delta;
  438.                 }
  439.                 else
  440.                 {
  441.                     for(i = Delta ; i < NumBufferLines ; i++)
  442.                         BufferLineWidths[i - Delta] = BufferLineWidths[i];
  443.  
  444.                         /* Scrolled down. */
  445.  
  446.                     ClipBlit(BPort,0,BufferLineOffsets[Delta],BPort,0,0,BufferColumnOffsets[NumBufferColumns],BufferLineOffsets[NumBufferLines - Delta],0xC0);
  447.  
  448.                     FirstLine += NumBufferLines - Delta;
  449.  
  450.                     Line = NumBufferLines - Delta;
  451.                 }
  452.             }
  453.         }
  454.         else
  455.             LastTopLine = FirstLine;
  456.     }
  457.     else
  458.         LastTopLine = FirstLine;
  459.  
  460.     if(BufferLines)
  461.     {
  462.         for(i = FirstLine ; i < Last ; i++)
  463.             PrintLine(BufferLines[i],Line++);
  464.     }
  465.  
  466.     ReleaseSemaphore(BufferSemaphore);
  467.  
  468.         /* We didn't fill the whole screen, so clear the rest. */
  469.  
  470.     if(Result < NumBufferLines)
  471.     {
  472.         WORD i;
  473.  
  474.         for(i = Result ; i < NumBufferLines ; i++)
  475.             BufferLineWidths[i] = 0;
  476.  
  477.         ClipBlit(BPort,0,0,BPort,0,BufferLineOffsets[Line],BufferColumnOffsets[NumBufferColumns],BufferLineOffsets[NumBufferLines - Line],0x00);
  478.     }
  479.  
  480.     return(Result);
  481. }
  482.  
  483.     /* MarkArea(LONG Column,LONG Line,LONG Length):
  484.      *
  485.      *    Mark an area in the term Buffer window.
  486.      */
  487.  
  488. STATIC VOID
  489. MarkArea(LONG Column,LONG Line,LONG Length)
  490. {
  491.     STATIC LONG OldColumn = -1,OldLine = -1,OldLength = -1;
  492.  
  493.     if(OldColumn != -1)
  494.         ClipBlit(BPort,0,0,BPort,BufferColumnOffsets[OldColumn],BufferLineOffsets[OldLine],BufferColumnOffsets[OldLength],LocalTextFontHeight,0x50);
  495.  
  496.     if(Column != -1)
  497.     {
  498.         if(OldColumn != Column || OldLine != Line || OldLength != Length)
  499.             ClipBlit(BPort,0,0,BPort,BufferColumnOffsets[Column],BufferLineOffsets[Line],BufferColumnOffsets[Length],LocalTextFontHeight,0x50);
  500.     }
  501.  
  502.     OldColumn    = Column;
  503.     OldLine        = Line;
  504.     OldLength    = Length;
  505. }
  506.  
  507.     /* BufferClipPage(struct BlockMarker *Marker):
  508.      *
  509.      *    Send the marked area to the clipboard.
  510.      */
  511.  
  512. STATIC VOID __inline
  513. BufferClipPage(struct BlockMarker *Marker)
  514. {
  515.     if(BufferLines)
  516.     {
  517.         struct IFFHandle *Handle;
  518.  
  519.         if(Handle = AllocIFF())
  520.         {
  521.             if(Handle -> iff_Stream = (ULONG)OpenClipboard(Config -> ClipConfig -> ClipboardUnit))
  522.             {
  523.                 InitIFFasClip(Handle);
  524.  
  525.                 if(!OpenIFF(Handle,IFFF_WRITE))
  526.                 {
  527.                     if(!PushChunk(Handle,ID_FTXT,ID_FORM,IFFSIZE_UNKNOWN))
  528.                     {
  529.                         if(!PushChunk(Handle,0,ID_CHRS,IFFSIZE_UNKNOWN))
  530.                         {
  531.                             LONG    Lines = Marker -> LastLine - Marker -> FirstLine - 1,
  532.                                 i;
  533.  
  534.                             if(LINE_WIDTH(BufferLines[Marker -> FirstLine]) > Marker -> FirstColumn)
  535.                                 WriteTrimmedString(Handle,&BufferLines[Marker -> FirstLine][Marker -> FirstColumn],LINE_WIDTH(BufferLines[Marker -> FirstLine]) - Marker -> FirstColumn);
  536.  
  537.                             WriteChunkBytes(Handle,"\n",1);
  538.  
  539.                             if(Lines > 0)
  540.                             {
  541.                                 for(i = 0 ; i < Lines ; i++)
  542.                                 {
  543.                                     if(LINE_WIDTH(BufferLines[Marker -> FirstLine + 1 + i]))
  544.                                         WriteTrimmedString(Handle,BufferLines[Marker -> FirstLine + 1 + i],LINE_WIDTH(BufferLines[Marker -> FirstLine + 1 + i]));
  545.  
  546.                                     WriteChunkBytes(Handle,"\n",1);
  547.                                 }
  548.                             }
  549.  
  550.                             if(Marker -> LastColumn > LINE_WIDTH(BufferLines[Marker -> LastLine]))
  551.                                 WriteTrimmedString(Handle,BufferLines[Marker -> LastLine],LINE_WIDTH(BufferLines[Marker -> LastLine]));
  552.                             else
  553.                                 WriteTrimmedString(Handle,BufferLines[Marker -> LastLine],Marker -> LastColumn);
  554.  
  555.                             WriteChunkBytes(Handle,"\n",1);
  556.  
  557.                             PopChunk(Handle);
  558.                         }
  559.  
  560.                         PopChunk(Handle);
  561.                     }
  562.  
  563.                     CloseIFF(Handle);
  564.                 }
  565.  
  566.                 CloseClipboard((struct ClipboardHandle *)Handle -> iff_Stream);
  567.             }
  568.  
  569.             FreeIFF(Handle);
  570.         }
  571.     }
  572. }
  573.  
  574.     /* BufferClip(VOID):
  575.      *
  576.      *    Start buffer marking process.
  577.      */
  578.  
  579. STATIC VOID
  580. BufferClip(VOID)
  581. {
  582.     struct BlockMarker    *Marker;
  583.     LONG             FirstX = BufferWindow -> MouseX / LocalTextFontWidth,
  584.                  FirstY = BufferWindow -> MouseY / LocalTextFontHeight;
  585.  
  586.     if(Marker = BM_SetMark(BufferWindow -> RPort,ToggleSelect,ToggleSelect,NumBufferColumns,NumBufferLines,0,0,CurrentLine,Lines,BufferWindow -> MouseX / LocalTextFontWidth,BufferWindow -> MouseY / LocalTextFontHeight,LocalTextFontWidth,LocalTextFontHeight))
  587.     {
  588.         struct IntuiMessage    *Massage;
  589.         ULONG             Code,IClass;
  590.         BYTE             Done = FALSE,Aborted = FALSE;
  591.         LONG             PlusX = LocalTextFontWidth - 1,
  592.                      MouseX,MouseY,
  593.                      Delta = 0;
  594.  
  595.         ReportMouse(TRUE,BufferWindow);
  596.  
  597.         while(!Done)
  598.         {
  599.             WaitPort(BufferWindow -> UserPort);
  600.  
  601.             while(Massage = (struct IntuiMessage *)GetMsg(BufferWindow -> UserPort))
  602.             {
  603.                 IClass    = Massage -> Class;
  604.                 Code    = Massage -> Code;
  605.                 MouseX    = Massage -> MouseX;
  606.                 MouseY    = Massage -> MouseY;
  607.  
  608.                 ReplyMsg(Massage);
  609.  
  610.                 if(IClass == IDCMP_INACTIVEWINDOW)
  611.                 {
  612.                     Done = Aborted = TRUE;
  613.  
  614.                     break;
  615.                 }
  616.  
  617.                 if(IClass == IDCMP_INTUITICKS && Delta != 0)
  618.                 {
  619.                     if(BufferLines)
  620.                     {
  621.                         if((Delta > 0 && CurrentLine + NumBufferLines < Lines) || (Delta < 0 && CurrentLine > 0))
  622.                         {
  623.                             if(Delta < 0)
  624.                             {
  625.                                 WORD i;
  626.  
  627.                                 for(i = NumBufferLines - 1 ; i > -Delta ; i--)
  628.                                     BufferLineWidths[i] = BufferLineWidths[i + Delta];
  629.  
  630.                                 if(DisplayedLines)
  631.                                     ClipBlit(BPort,0,0,BPort,0,LocalTextFontHeight,BufferColumnOffsets[NumBufferColumns],BufferLineOffsets[NumBufferLines - 1],0xC0);
  632.  
  633.                                 BufferLineWidths[0] = NumBufferColumns;
  634.  
  635.                                 PrintLine(BufferLines[--CurrentLine],0);
  636.                             }
  637.                             else
  638.                             {
  639.                                 WORD i;
  640.  
  641.                                 for(i = Delta ; i < NumBufferLines ; i++)
  642.                                     BufferLineWidths[i - Delta] = BufferLineWidths[i];
  643.  
  644.                                 if(DisplayedLines)
  645.                                     ClipBlit(BPort,0,LocalTextFontHeight,BPort,0,0,BufferColumnOffsets[NumBufferColumns],BufferLineOffsets[NumBufferLines - 1],0xC0);
  646.  
  647.                                 BufferLineWidths[NumBufferLines - 1] = NumBufferColumns;
  648.  
  649.                                 PrintLine(BufferLines[CurrentLine + NumBufferLines],NumBufferLines - 1);
  650.  
  651.                                 CurrentLine++;
  652.                             }
  653.  
  654.                             Marker -> Top += Delta;
  655.                             Marker -> LastY -= Delta;
  656.  
  657.                             BM_ExtendMark(Marker,(MouseX + PlusX) / LocalTextFontWidth,MouseY / LocalTextFontHeight,Delta);
  658.                         }
  659.                         else
  660.                             Delta = 0;
  661.                     }
  662.                 }
  663.  
  664.                 if(IClass == IDCMP_MOUSEBUTTONS && (Code & IECODE_UP_PREFIX))
  665.                 {
  666.                     BM_Draw(Marker,Marker -> Unselect);
  667.  
  668.                     Done = TRUE;
  669.  
  670.                     break;
  671.                 }
  672.  
  673.                 if(IClass == IDCMP_MOUSEMOVE)
  674.                 {
  675.                     BM_ExtendMark(Marker,(MouseX + PlusX) / LocalTextFontWidth,MouseY / LocalTextFontHeight,0);
  676.  
  677.                     if(MouseY < 1)
  678.                     {
  679.                         if(CurrentLine > 0)
  680.                             Delta = -1;
  681.                     }
  682.                     else
  683.                     {
  684.                         if(MouseY >= BufferWindow -> Height - 1 && CurrentLine + NumBufferLines < Lines)
  685.                             Delta = 1;
  686.                     }
  687.  
  688.                     while(Delta)
  689.                     {
  690.                         MouseX    = Window -> MouseX;
  691.                         MouseY    = Window -> MouseY;
  692.  
  693.                         if((Delta < 0 && MouseY > 0) || (Delta > 0 && MouseY < BufferWindow -> Height - 1))
  694.                             break;
  695.                         else
  696.                         {
  697.                             if(BufferLines)
  698.                             {
  699.                                 if((Delta > 0 && CurrentLine + NumBufferLines < Lines) || (Delta < 0 && CurrentLine > 0))
  700.                                 {
  701.                                     if(Delta < 0)
  702.                                     {
  703.                                         WORD i;
  704.  
  705.                                         for(i = NumBufferLines - 1 ; i > -Delta ; i--)
  706.                                             BufferLineWidths[i] = BufferLineWidths[i + Delta];
  707.  
  708.                                         if(DisplayedLines)
  709.                                             ClipBlit(BPort,0,0,BPort,0,LocalTextFontHeight,BufferColumnOffsets[NumBufferColumns],BufferLineOffsets[NumBufferLines - 1],0xC0);
  710.  
  711.                                         BufferLineWidths[0] = NumBufferColumns;
  712.  
  713.                                         PrintLine(BufferLines[--CurrentLine],0);
  714.                                     }
  715.                                     else
  716.                                     {
  717.                                         WORD i;
  718.  
  719.                                         for(i = Delta ; i < NumBufferLines ; i++)
  720.                                             BufferLineWidths[i - Delta] = BufferLineWidths[i];
  721.  
  722.                                         if(DisplayedLines)
  723.                                             ClipBlit(BPort,0,LocalTextFontHeight,BPort,0,0,BufferColumnOffsets[NumBufferColumns],BufferLineOffsets[NumBufferLines - 1],0xC0);
  724.  
  725.                                         BufferLineWidths[NumBufferLines - 1] = NumBufferColumns;
  726.  
  727.                                         PrintLine(BufferLines[CurrentLine + NumBufferLines],NumBufferLines - 1);
  728.  
  729.                                         CurrentLine++;
  730.                                     }
  731.  
  732.                                     Marker -> Top    += Delta;
  733.                                     Marker -> LastY    -= Delta;
  734.  
  735.                                     BM_ExtendMark(Marker,(MouseX + PlusX) / LocalTextFontWidth,MouseY / LocalTextFontHeight,Delta);
  736.  
  737.                                     SetGadgetAttrs(Scroller,BufferWindow,NULL,
  738.                                         PGA_Top,CurrentLine,
  739.                                     TAG_DONE);
  740.                                 }
  741.                                 else
  742.                                     break;
  743.                             }
  744.                             else
  745.                                 break;
  746.                         }
  747.                     }
  748.  
  749.                     Delta = 0;
  750.                 }
  751.             }
  752.         }
  753.  
  754.         ReportMouse(FALSE,BufferWindow);
  755.  
  756.         while(Massage = (struct IntuiMessage *)GetMsg(BufferWindow -> UserPort))
  757.             ReplyMsg(Massage);
  758.  
  759.         if(!Aborted)
  760.         {
  761.             if(FirstX != BufferWindow -> MouseX / LocalTextFontWidth || FirstY != BufferWindow -> MouseY / LocalTextFontHeight)
  762.             {
  763.                 SetWait(BufferWindow);
  764.  
  765.                 if(Marker -> FirstColumn == Marker -> Width)
  766.                 {
  767.                     Marker -> FirstLine++;
  768.  
  769.                     Marker -> FirstColumn = 0;
  770.                 }
  771.  
  772.                 if(Marker -> LastColumn == 0)
  773.                 {
  774.                     Marker -> LastLine--;
  775.  
  776.                     Marker -> LastColumn = Marker -> Width;
  777.                 }
  778.  
  779.                 if(Marker -> FirstLine <= Marker -> LastLine)
  780.                 {
  781.                     if(Marker -> FirstLine != Marker -> LastLine || Marker -> FirstColumn != Marker -> LastColumn)
  782.                     {
  783.                         if(BufferLines)
  784.                         {
  785.                             if(Marker -> FirstLine == Marker -> LastLine)
  786.                                 SaveClip(&BufferLines[Marker -> FirstLine][Marker -> FirstColumn],Marker -> LastColumn - Marker -> FirstColumn);
  787.                             else
  788.                                 BufferClipPage(Marker);
  789.                         }
  790.                     }
  791.                 }
  792.  
  793.                 ClrWait(BufferWindow);
  794.             }
  795.         }
  796.  
  797.         FreeVec(Marker);
  798.     }
  799. }
  800.  
  801.     /* StartBufferSearch(BYTE NewSearchString):
  802.      *
  803.      *    Search the buffer for a string.
  804.      */
  805.  
  806. STATIC VOID
  807. StartBufferSearch(BYTE NewSearchString)
  808. {
  809.     STATIC UBYTE SearchBuffer[256];
  810.  
  811.     BYTE StartSearch = TRUE;
  812.  
  813.     BlockWindow(BufferWindow);
  814.  
  815.     if(NewSearchString || !SearchBuffer[0])
  816.     {
  817.         if(GetSearchString(SearchBuffer))
  818.         {
  819.             if(SearchBuffer[0])
  820.             {
  821.                 if(BufferSearchInfo)
  822.                     DeleteSearchInfo(BufferSearchInfo);
  823.  
  824.                 BufferSearchInfo = CreateSearchInfo(SearchBuffer);
  825.             }
  826.             else
  827.                 StartSearch = FALSE;
  828.         }
  829.         else
  830.             StartSearch = FALSE;
  831.     }
  832.     else
  833.     {
  834.         if(!BufferSearchInfo)
  835.             BufferSearchInfo = CreateSearchInfo(SearchBuffer);
  836.     }
  837.  
  838.     if(StartSearch && BufferSearchInfo)
  839.     {
  840.         if(Lines)
  841.         {
  842.             LONG LineNumber;
  843.  
  844.             ObtainSemaphore(BufferSemaphore);
  845.  
  846.             LineNumber = SearchTextBuffer(BufferSearchInfo);
  847.  
  848.             ReleaseSemaphore(BufferSemaphore);
  849.  
  850.             if(LineNumber == -1)
  851.             {
  852.                 BlockWindows();
  853.  
  854.                 MyEasyRequest(BufferWindow,LocaleString(MSG_TERMBUFFER_DID_NOT_FIND_TXT),LocaleString(MSG_GLOBAL_CONTINUE_TXT),SearchBuffer);
  855.  
  856.                 ReleaseWindows();
  857.  
  858.                 FlushMsg(BufferWindow);
  859.  
  860.                 BufferSearchInfo -> FoundY = -1;
  861.  
  862.                 MarkArea(-1,-1,-1);
  863.             }
  864.             else
  865.             {
  866.                 if(LineNumber < CurrentLine)
  867.                 {
  868.                     MarkArea(-1,-1,-1);
  869.  
  870.                     DisplayedLines = RedrawScreen(CurrentLine = LineNumber);
  871.  
  872.                     SetGadgetAttrs(Scroller,BufferWindow,NULL,
  873.                         PGA_Top,CurrentLine,
  874.                     TAG_DONE);
  875.                 }
  876.                 else
  877.                 {
  878.                     if(LineNumber > CurrentLine + DisplayedLines - 1)
  879.                     {
  880.                         MarkArea(-1,-1,-1);
  881.  
  882.                         if(LineNumber >= Lines - NumBufferLines)
  883.                         {
  884.                             LONG NewCurrentLine;
  885.  
  886.                             if((NewCurrentLine = Lines - NumBufferLines) < 0)
  887.                                 NewCurrentLine = 0;
  888.  
  889.                             if(CurrentLine != NewCurrentLine)
  890.                                 DisplayedLines = RedrawScreen(CurrentLine = NewCurrentLine);
  891.                         }
  892.                         else
  893.                             DisplayedLines = RedrawScreen(CurrentLine = LineNumber);
  894.  
  895.                         SetGadgetAttrs(Scroller,BufferWindow,NULL,
  896.                             PGA_Top,CurrentLine,
  897.                         TAG_DONE);
  898.                     }
  899.                 }
  900.  
  901.                 MarkArea(BufferSearchInfo -> FoundX,LineNumber - CurrentLine,BufferSearchInfo -> PatternWidth);
  902.             }
  903.         }
  904.         else
  905.             MyEasyRequest(BufferWindow,LocaleString(MSG_GLOBAL_NOTHING_IN_THE_BUFFER_TXT),LocaleString(MSG_GLOBAL_CONTINUE_TXT));
  906.     }
  907.  
  908.     ReleaseWindow(BufferWindow);
  909. }
  910.  
  911.     /* LaunchBuffer():
  912.      *
  913.      *    Launch the buffer process.
  914.      */
  915.  
  916. BYTE
  917. LaunchBuffer()
  918. {
  919.         /* Is the buffer process already running? */
  920.  
  921.     if(BufferProcess)
  922.     {
  923.             /* Tell it to bring its screen to the front. */
  924.  
  925.         Signal(BufferProcess,SIG_TOFRONT);
  926.  
  927.             /* Return success. */
  928.  
  929.         return(TRUE);
  930.     }
  931.     else
  932.     {
  933.         struct MsgPort    *ReplyPort;
  934.         BYTE         Result = FALSE;
  935.  
  936.             /* Create reply port. */
  937.  
  938.         if(ReplyPort = CreateMsgPort())
  939.         {
  940.             struct Message *Message;
  941.  
  942.                 /* Create startup message. */
  943.  
  944.             if(Message = (struct Message *)AllocVec(sizeof(struct Message),MEMF_ANY|MEMF_CLEAR))
  945.             {
  946.                 Message -> mn_ReplyPort    = ReplyPort;
  947.                 Message -> mn_Length    = sizeof(struct Message);
  948.  
  949.                     /* Launc the buffer process. */
  950.  
  951.                 if(BufferProcess = (struct Process *)CreateNewProcTags(
  952.                     NP_Entry,    BufferServer,
  953.                     NP_Name,    "term buffer process",
  954.                     NP_Priority,    0,
  955.                     NP_StackSize,    8192,
  956.                     NP_WindowPtr,    -1,
  957.                 TAG_END))
  958.                 {
  959.                         /* Send the startup message. */
  960.  
  961.                     PutMsg(&BufferProcess -> pr_MsgPort,Message);
  962.  
  963.                         /* Wait for reply. */
  964.  
  965.                     WaitPort(ReplyPort);
  966.  
  967.                         /* Pick up the reply. */
  968.  
  969.                     GetMsg(ReplyPort);
  970.  
  971.                         /* Is the process still running? */
  972.  
  973.                     if(BufferProcess)
  974.                         Result = TRUE;
  975.                 }
  976.  
  977.                     /* Free the startup message. */
  978.  
  979.                 FreeVec(Message);
  980.             }
  981.  
  982.                 /* Delete the reply port. */
  983.  
  984.             DeleteMsgPort(ReplyPort);
  985.         }
  986.  
  987.             /* Return the result. */
  988.  
  989.         return(Result);
  990.     }
  991. }
  992.  
  993.     /* TerminateBuffer():
  994.      *
  995.      *    Terminate the buffer process.
  996.      */
  997.  
  998. VOID
  999. TerminateBuffer()
  1000. {
  1001.     if(BufferProcess)
  1002.     {
  1003.         Forbid();
  1004.  
  1005.         Signal(BufferProcess,SIG_KILL);
  1006.  
  1007.         SetSignal(0,SIG_HANDSHAKE);
  1008.  
  1009.         Wait(SIG_HANDSHAKE);
  1010.  
  1011.         Permit();
  1012.     }
  1013.  
  1014.     LastTopLine = -1;
  1015. }
  1016.  
  1017.     /* BufferServer():
  1018.      *
  1019.      *    Asynchronous task to display the data stored in the
  1020.      *    scrollback display buffer.
  1021.      */
  1022.  
  1023. VOID __saveds
  1024. BufferServer()
  1025. {
  1026.     struct ColorSpec     ColorSpec[3];
  1027.  
  1028.     ULONG             SignalSet;
  1029.  
  1030.     struct IntuiMessage    *Massage;
  1031.     ULONG             IClass,Code,Qualifier,LastQualifier = NULL;
  1032.     UBYTE             Char,LastChar = 0;
  1033.  
  1034.     LONG             MouseX,MouseY,LastWidth = 0;
  1035.  
  1036.     UBYTE             PercentBuffer[80];
  1037.  
  1038.     struct Menu        *BufferMenuStrip;
  1039.  
  1040.     LONG             Width;
  1041.     ULONG             DisplayMode;
  1042.  
  1043.     struct Rectangle     DisplayClip;
  1044.     struct DimensionInfo     DimensionInfo;
  1045.  
  1046.     UWORD             SomeColour,CharCount,Height;
  1047.  
  1048.     struct TextFont        *LocalFont;
  1049.  
  1050.     struct Message        *StartupMessage;
  1051.     struct MsgPort        *StartupPort = &((struct Process *)SysBase -> ThisTask) -> pr_MsgPort;
  1052.     struct TagItem        *TagList;
  1053.  
  1054.         /* Wait for startup message. */
  1055.  
  1056.     WaitPort(StartupPort);
  1057.  
  1058.     StartupMessage = GetMsg(StartupPort);
  1059.  
  1060.         /* Reset top line index. */
  1061.  
  1062.     LastTopLine = -1;
  1063.  
  1064.         /* Clone the global font data. */
  1065.  
  1066.     LocalTextFontWidth    = TextFontWidth;
  1067.     LocalTextFontHeight    = TextFontHeight;
  1068.     LocalTextFontBase    = TextFontBase;
  1069.  
  1070.     memcpy(&LocalTextFont,&TextAttr,sizeof(struct TextAttr));
  1071.  
  1072.     LocalTextFont . ta_Name = LocalTextFontName;
  1073.  
  1074.     strcpy(LocalTextFontName,TextAttr . ta_Name);
  1075.  
  1076.     memcpy(&LocalUserFont,&UserFont,sizeof(struct TextAttr));
  1077.  
  1078.     LocalUserFont . ta_Name = LocalUserFontName;
  1079.  
  1080.     strcpy(LocalUserFontName,UserFont . ta_Name);
  1081.  
  1082.         /* Up and running... */
  1083.  
  1084.     BufferTerminated = FALSE;
  1085.  
  1086.         /* Set up the startup colours for our buffer screen. */
  1087.  
  1088.     ColorSpec[0] . ColorIndex    = 0;
  1089.     ColorSpec[0] . Red        = (Config -> ScreenConfig -> Colours[0] >> 8) & 0xF;
  1090.     ColorSpec[0] . Green        = (Config -> ScreenConfig -> Colours[0] >> 4) & 0xF;
  1091.     ColorSpec[0] . Blue        = (Config -> ScreenConfig -> Colours[0]     ) & 0xF;
  1092.  
  1093.     switch(Config -> ScreenConfig -> ColourMode)
  1094.     {
  1095.         case COLOUR_EIGHT:
  1096.  
  1097.             SomeColour = Config -> ScreenConfig -> Colours[7];
  1098.             break;
  1099.  
  1100.         case COLOUR_SIXTEEN:
  1101.  
  1102.             SomeColour = Config -> ScreenConfig -> Colours[15];
  1103.             break;
  1104.  
  1105.         case COLOUR_AMIGA:
  1106.         case COLOUR_MONO:
  1107.  
  1108.             SomeColour = Config -> ScreenConfig -> Colours[1];
  1109.             break;
  1110.     }
  1111.  
  1112.     ColorSpec[1] . ColorIndex    = 1;
  1113.     ColorSpec[1] . Red        = (SomeColour >> 8) & 0xF;
  1114.     ColorSpec[1] . Green        = (SomeColour >> 4) & 0xF;
  1115.     ColorSpec[1] . Blue        = (SomeColour     ) & 0xF;
  1116.  
  1117.     ColorSpec[2] . ColorIndex    = -1;
  1118.  
  1119.         /* We'll use a fixed screen width, only the
  1120.          * height is adapted from the main screen.
  1121.          */
  1122.  
  1123.     DisplayMode = Config -> ScreenConfig -> DisplayMode;
  1124.  
  1125.     if(Screen)
  1126.     {
  1127.         Width = Screen -> Width - (ARROW_WIDTH + 1);
  1128.  
  1129.         if((CharCount = Width / LocalTextFontWidth) > BUFFER_LINE_WIDTH)
  1130.             CharCount = BUFFER_LINE_WIDTH;
  1131.     }
  1132.     else
  1133.         CharCount = BUFFER_LINE_WIDTH;
  1134.  
  1135.     Width = CharCount * LocalTextFontWidth + ARROW_WIDTH + 1;
  1136.  
  1137.         /* Get the mode dimension info. */
  1138.  
  1139.     if(GetDisplayInfoData(NULL,(APTR)&DimensionInfo,sizeof(struct DimensionInfo),DTAG_DIMS,DisplayMode))
  1140.     {
  1141.             /* Is the screen width smaller than the
  1142.              * minimum screen mode width?
  1143.              */
  1144.  
  1145.         if(Width < DimensionInfo . MinRasterWidth)
  1146.         {
  1147.                 /* Use default modes. */
  1148.  
  1149.             if((DisplayMode & LACE) || ((DisplayMode & MONITOR_ID_MASK) == A2024_MONITOR_ID))
  1150.                 DisplayMode = HIRESLACE_KEY;
  1151.             else
  1152.                 DisplayMode = HIRES_KEY;
  1153.         }
  1154.     }
  1155.  
  1156.     if(LocalFont = OpenFont(&LocalTextFont))
  1157.     {
  1158.             /* Inquire the text overscan dimensions. */
  1159.  
  1160.         if(QueryOverscan(DisplayMode,&DisplayClip,OSCAN_TEXT))
  1161.         {
  1162.                 /* Centre the buffer screen. */
  1163.  
  1164.             if(DisplayClip . MaxX - DisplayClip . MinX + 1 > Width)
  1165.             {
  1166.                 LONG Differ = ((DisplayClip . MaxX - DisplayClip . MinX + 1) - (Width)) / 2;
  1167.  
  1168.                 DisplayClip . MinX += Differ;
  1169.                 DisplayClip . MaxX -= Differ;
  1170.             }
  1171.  
  1172.                 /* Open a single bitplane clone of the main screen. */
  1173.  
  1174.             if(BufferScreen = (struct Screen *)OpenScreenTags(NULL,
  1175.                 SA_Title,    LocaleString(MSG_TERMBUFFER_TERM_BUFFER_TXT),
  1176.                 SA_Depth,    1,
  1177.                 SA_DClip,    &DisplayClip,
  1178.                 SA_DisplayID,    DisplayMode,
  1179.                 SA_Font,    &LocalUserFont,
  1180.                 SA_Behind,    TRUE,
  1181.                 SA_AutoScroll,    TRUE,
  1182.                 SA_Colors,    ColorSpec,
  1183.             TAG_END))
  1184.             {
  1185.                 if(BufferVisualInfo = GetVisualInfo(BufferScreen,TAG_DONE))
  1186.                 {
  1187.                     LocalizeMenu(BufferMenu,MSG_TERMBUFFER_PROJECT_MEN);
  1188.  
  1189.                     if(BufferMenuStrip = CreateMenus(BufferMenu,TAG_DONE))
  1190.                     {
  1191.                         if(LayoutMenus(BufferMenuStrip,BufferVisualInfo,
  1192.                             GTMN_TextAttr,        &LocalUserFont,
  1193.                             GTMN_NewLookMenus,    TRUE,
  1194.                         TAG_DONE))
  1195.                         {
  1196.                             WORD TitleOffset,Len;
  1197.  
  1198.                             Height = (BufferScreen -> Height - (BufferScreen -> BarHeight + 2)) / LocalTextFontHeight;
  1199.  
  1200.                             Len = strlen(LocaleString(MSG_TERMBUFFER_TERM_BUFFER_TXT));
  1201.  
  1202.                             TitleOffset = TextLength(BufferScreen -> BarLayer -> rp,LocaleString(MSG_TERMBUFFER_TERM_BUFFER_TXT),Len) + TextLength(BufferScreen -> BarLayer -> rp," ",1) + 4;
  1203.  
  1204.                                 /* Open a cute window on our buffer screen. */
  1205.  
  1206.                             if(BufferWindow = OpenWindowTags(NULL,
  1207.                                 WA_Top,        BufferScreen -> BarHeight + 2,
  1208.                                 WA_Left,    0,
  1209.                                 WA_Width,    BufferScreen -> Width,
  1210.                                 WA_Height,    Height * LocalTextFontHeight,
  1211.                                 WA_Backdrop,    TRUE,
  1212.                                 WA_Borderless,    TRUE,
  1213.                                 WA_SmartRefresh,FALSE,
  1214.                                 WA_CustomScreen,BufferScreen,
  1215.                                 WA_RMBTrap,    TRUE,
  1216.                                 WA_NewLookMenus,TRUE,
  1217.                                 WA_RptQueue,    1,
  1218.                                 WA_IDCMP,    IDCMP_IDCMPUPDATE | IDCMP_RAWKEY | IDCMP_INACTIVEWINDOW | IDCMP_MOUSEBUTTONS | IDCMP_MENUPICK | IDCMP_GADGETUP | IDCMP_GADGETDOWN | IDCMP_MOUSEMOVE,
  1219.                             TAG_DONE))
  1220.                             {
  1221.                                 if(BufferLineWidths = (UWORD *)AllocVec(2 * sizeof(UWORD) * (BufferWindow -> Height / LocalTextFontHeight) + sizeof(UWORD) * (BufferWindow -> Width / LocalTextFontWidth),MEMF_ANY | MEMF_CLEAR))
  1222.                                 {
  1223.                                     UWORD    Index;
  1224.                                     WORD    i;
  1225.  
  1226.                                     BufferLineOffsets    = &BufferLineWidths[BufferWindow -> Height / LocalTextFontHeight];
  1227.                                     BufferColumnOffsets    = &BufferLineOffsets[BufferWindow -> Height / LocalTextFontHeight];
  1228.  
  1229.                                     for(i = Index = 0 ; i < BufferWindow -> Height / LocalTextFontHeight ; i++)
  1230.                                     {
  1231.                                         BufferLineOffsets[i] = Index;
  1232.  
  1233.                                         Index += LocalTextFontHeight;
  1234.                                     }
  1235.  
  1236.                                     for(i = Index = 0 ; i < BufferWindow -> Width / LocalTextFontWidth ; i++)
  1237.                                     {
  1238.                                         BufferColumnOffsets[i] = Index;
  1239.  
  1240.                                         Index += LocalTextFontWidth;
  1241.                                     }
  1242.  
  1243.                                     if(CreateScroller(BufferWindow -> Height))
  1244.                                     {
  1245.                                             /* Signal our father process that
  1246.                                              * we're running.
  1247.                                              */
  1248.  
  1249.                                         ReplyMsg(StartupMessage);
  1250.  
  1251.                                         StartupMessage = NULL;
  1252.  
  1253.                                         SetMenuStrip(BufferWindow,BufferMenuStrip);
  1254.  
  1255.                                         AddGList(BufferWindow,Scroller,(UWORD)-1,(UWORD)-1,NULL);
  1256.                                         RefreshGList(Scroller,BufferWindow,NULL,(UWORD)-1);
  1257.     
  1258. Restart:                                    BPort = BufferWindow -> RPort;
  1259.  
  1260.                                         SetFont(BPort,LocalFont);
  1261.  
  1262.                                             /* Determine maximum dimensions of
  1263.                                              * the buffer screen (in rows and
  1264.                                              * columns).
  1265.                                              */
  1266.  
  1267.                                         NumBufferColumns    = (BufferWindow -> Width - (ARROW_WIDTH + 1)) / LocalTextFontWidth;
  1268.                                         NumBufferLines        = BufferWindow -> Height / LocalTextFontHeight;
  1269.  
  1270.                                             /* Bring the screen to the front. */
  1271.  
  1272.                                         BumpWindow(BufferWindow);
  1273.  
  1274.                                             /* Set the drawing pens for the window. */
  1275.  
  1276.                                         SetAPen(BPort,1);
  1277.                                         SetBPen(BPort,0);
  1278.                                         SetDrMd(BPort,JAM2);
  1279.  
  1280.                                             /* Initial creation of the buffer display. */
  1281.  
  1282.                                         DisplayedLines = RedrawScreen(CurrentLine = 0);
  1283.  
  1284.                                         SetGadgetAttrs(Scroller,BufferWindow,NULL,
  1285.                                             PGA_Top,    0,
  1286.                                             PGA_Total,    Lines,
  1287.                                             PGA_Visible,    NumBufferLines,
  1288.                                         TAG_DONE);
  1289.  
  1290.                                         BufferWindow -> Flags &= ~WFLG_RMBTRAP;
  1291.  
  1292.                                         do
  1293.                                         {
  1294.                                                 /* Show where we are. */
  1295.  
  1296.                                             if(Lines)
  1297.                                             {
  1298.                                                 LONG Width;
  1299.  
  1300.                                                 SetAPen(BufferScreen -> BarLayer -> rp,0);
  1301.                                                 SetBPen(BufferScreen -> BarLayer -> rp,1);
  1302.                                                 SetDrMd(BufferScreen -> BarLayer -> rp,JAM2);
  1303.  
  1304.                                                 if(LocaleBase)
  1305.                                                     SPrintf(PercentBuffer,"%lD/%lD (%ld%%)",CurrentLine,Lines > NumBufferLines ? Lines - NumBufferLines : 0,(100 * (CurrentLine + DisplayedLines)) / Lines);
  1306.                                                 else
  1307.                                                     SPrintf(PercentBuffer,"%ld/%ld (%ld%%)",CurrentLine,Lines > NumBufferLines ? Lines - NumBufferLines : 0,(100 * (CurrentLine + DisplayedLines)) / Lines);
  1308.  
  1309.                                                 Len = strlen(PercentBuffer);
  1310.  
  1311.                                                 Move(BufferScreen -> BarLayer -> rp,TitleOffset,BufferScreen -> BarLayer -> rp -> Font -> tf_Baseline + 1);
  1312.                                                 Text(BufferScreen -> BarLayer -> rp,PercentBuffer,Len);
  1313.  
  1314.                                                 Width = TextLength(BufferScreen -> BarLayer -> rp,PercentBuffer,Len);
  1315.  
  1316.                                                 if(LastWidth > Width)
  1317.                                                 {
  1318.                                                     SetAPen(BufferScreen -> BarLayer -> rp,1);
  1319.  
  1320.                                                     RectFill(BufferScreen -> BarLayer -> rp,TitleOffset + Width,1,TitleOffset + LastWidth - 1,BufferScreen -> BarLayer -> rp -> Font -> tf_YSize);
  1321.                                                 }
  1322.  
  1323.                                                 LastWidth = Width;
  1324.                                             }
  1325.  
  1326.                                             SignalSet = Wait(SIG_KILL | SIG_TOFRONT | SIG_UPDATE | SIG_MOVEUP | PORTMASK(BufferWindow -> UserPort));
  1327.  
  1328.                                                 /* Leave the town? */
  1329.  
  1330.                                             if(SignalSet & SIG_KILL)
  1331.                                                 BufferTerminated = TRUE;
  1332.  
  1333.                                                 /* Bring our window to the front. */
  1334.  
  1335.                                             if(SignalSet & SIG_TOFRONT)
  1336.                                                 BumpWindow(BufferWindow);
  1337.  
  1338.                                                 /* We've got one more line in the
  1339.                                                  * buffer.
  1340.                                                  */
  1341.  
  1342.                                             if(SignalSet & SIG_UPDATE)
  1343.                                             {
  1344.                                                 ObtainSemaphore(BufferSemaphore);
  1345.  
  1346.                                                 if(BufferLines)
  1347.                                                 {
  1348.                                                     if(Lines - CurrentLine > DisplayedLines && DisplayedLines < NumBufferLines)
  1349.                                                     {
  1350.                                                         LONG i = CurrentLine + DisplayedLines;
  1351.  
  1352.                                                         do
  1353.                                                             PrintLine(BufferLines[i++],DisplayedLines++);
  1354.                                                         while(DisplayedLines < NumBufferLines);
  1355.                                                     }
  1356.                                                 }
  1357.  
  1358.                                                 ReleaseSemaphore(BufferSemaphore);
  1359.  
  1360.                                                 SetGadgetAttrs(Scroller,BufferWindow,NULL,
  1361.                                                     PGA_Total,    Lines,
  1362.                                                     PGA_Visible,    NumBufferLines,
  1363.                                                 TAG_DONE);
  1364.                                             }
  1365.  
  1366.                                                 /* The contents of the buffer have moved
  1367.                                              * up a line.
  1368.                                                  */
  1369.  
  1370.                                             if(SignalSet & SIG_MOVEUP)
  1371.                                             {
  1372.                                                 LastTopLine++;
  1373.  
  1374.                                                 DisplayedLines = RedrawScreen(CurrentLine);
  1375.                                             }
  1376.  
  1377.                                                 /* Process the incoming window
  1378.                                              * input.
  1379.                                                  */
  1380.  
  1381.                                             while(Massage = (struct IntuiMessage *)GetMsg(BufferWindow -> UserPort))
  1382.                                             {
  1383.                                                 IClass        = Massage -> Class;
  1384.                                                 Code        = Massage -> Code;
  1385.                                                 Qualifier    = Massage -> Qualifier;
  1386.                                                 MouseX        = Massage -> MouseX;
  1387.                                                 MouseY        = Massage -> MouseY;
  1388.                                                 TagList        = (struct TagItem *)Massage -> IAddress;
  1389.  
  1390.                                                     /* This hack is necessary to obtain the
  1391.                                                  * character codes generated for the cursor
  1392.                                                  * keys. A control or alternate qualifier
  1393.                                                  * would spoil the result (i.e. we would
  1394.                                                  * not get a valid key code).
  1395.                                                      */
  1396.  
  1397.                                                 Massage -> Qualifier = NULL;
  1398.  
  1399.                                                 Char = KeyConvert(Massage,NULL,NULL);
  1400.  
  1401.                                                     /* Just in case anybody needs it... */
  1402.  
  1403.                                                 Massage -> Qualifier = Qualifier;
  1404.  
  1405.                                                 ReplyMsg((struct Message *)Massage);
  1406.  
  1407.                                                 if(IClass == IDCMP_IDCMPUPDATE)
  1408.                                                 {
  1409.                                                     switch(GetTagData(GA_ID,0,TagList))
  1410.                                                     {
  1411.                                                         case GAD_UP:
  1412.  
  1413.                                                             if(CurrentLine > 0)
  1414.                                                             {
  1415.                                                                 CurrentLine--;
  1416.  
  1417.                                                                 MarkArea(-1,-1,-1);
  1418.  
  1419.                                                                 SetGadgetAttrs(Scroller,BufferWindow,NULL,
  1420.                                                                     PGA_Top,CurrentLine,
  1421.                                                                 TAG_DONE);
  1422.  
  1423.                                                                 DisplayedLines = RedrawScreen(CurrentLine);
  1424.                                                             }
  1425.  
  1426.                                                             break;
  1427.  
  1428.                                                         case GAD_DOWN:
  1429.  
  1430.                                                             if(CurrentLine + NumBufferLines < Lines)
  1431.                                                             {
  1432.                                                                 CurrentLine++;
  1433.  
  1434.                                                                 MarkArea(-1,-1,-1);
  1435.  
  1436.                                                                 SetGadgetAttrs(Scroller,BufferWindow,NULL,
  1437.                                                                     PGA_Top,CurrentLine,
  1438.                                                                 TAG_DONE);
  1439.  
  1440.                                                                 DisplayedLines = RedrawScreen(CurrentLine);
  1441.                                                             }
  1442.  
  1443.                                                             break;
  1444.                                                     }
  1445.                                                 }
  1446.  
  1447.                                                 if(IClass == IDCMP_MOUSEMOVE || IClass == IDCMP_GADGETDOWN || IClass == IDCMP_GADGETUP)
  1448.                                                 {
  1449.                                                     LONG Position;
  1450.  
  1451.                                                     GetAttr(PGA_Top,Scroller,&Position);
  1452.  
  1453.                                                     if(Position != CurrentLine)
  1454.                                                     {
  1455.                                                         MarkArea(-1,-1,-1);
  1456.  
  1457.                                                         DisplayedLines = RedrawScreen(CurrentLine = Position);
  1458.                                                     }
  1459.                                                 }
  1460.  
  1461.                                                 if(IClass == IDCMP_RAWKEY)
  1462.                                                 {
  1463.                                                     if(Code == HELP_CODE)
  1464.                                                         GuideDisplay(CONTEXT_TEXTBUFFER);
  1465.  
  1466.                                                     if(LastChar)
  1467.                                                     {
  1468.                                                         if((Code & IECODE_UP_PREFIX) || !(LastQualifier & IEQUALIFIER_REPEAT))
  1469.                                                         {
  1470.                                                             SetGadgetAttrs(Scroller,BufferWindow,NULL,
  1471.                                                                 PGA_Top,CurrentLine,
  1472.                                                             TAG_DONE);
  1473.                                                         }
  1474.                                                     }
  1475.  
  1476.                                                     if(LastChar = Char)
  1477.                                                     {
  1478.                                                             /* Use the numeric keypad keys to
  1479.                                                          * move through the buffer.
  1480.                                                              */
  1481.  
  1482.                                                         if(Qualifier & IEQUALIFIER_NUMERICPAD)
  1483.                                                         {
  1484.                                                                 /* Remove the numpad qualifier. */
  1485.  
  1486.                                                             Qualifier &= ~IEQUALIFIER_NUMERICPAD;
  1487.  
  1488.                                                             switch(Char - '0')
  1489.                                                             {
  1490.                                                                     /* Jump to bottom. */
  1491.  
  1492.                                                                 case 1: Char = CDN;
  1493.                                                                     Qualifier |= IEQUALIFIER_CONTROL;
  1494.                                                                     break;
  1495.  
  1496.                                                                     /* Jump to top. */
  1497.  
  1498.                                                                 case 7: Char = CUP;
  1499.                                                                     Qualifier |= IEQUALIFIER_CONTROL;
  1500.                                                                     break;
  1501.  
  1502.                                                                     /* Move one page down. */
  1503.  
  1504.                                                                 case 3: Char = CDN;
  1505.                                                                     Qualifier |= IEQUALIFIER_LSHIFT;
  1506.                                                                     break;
  1507.  
  1508.                                                                     /* Move one page up. */
  1509.  
  1510.                                                                 case 9: Char = CUP;
  1511.                                                                     Qualifier |= IEQUALIFIER_LSHIFT;
  1512.                                                                     break;
  1513.  
  1514.                                                                     /* Move one line down. */
  1515.  
  1516.                                                                 case 2: Char = CDN;
  1517.                                                                     break;
  1518.  
  1519.                                                                     /* Move one line up. */
  1520.  
  1521.                                                                 case 8: Char = CUP;
  1522.                                                                     break;
  1523.                                                             }
  1524.                                                         }
  1525.  
  1526.                                                             /* Check cursor keys. */
  1527.  
  1528.                                                         switch(Char)
  1529.                                                         {
  1530.                                                                 /* Scroll the buffer up. */
  1531.  
  1532.                                                             case CUP:
  1533.  
  1534.                                                                 if(Qualifier & IEQUALIFIER_CONTROL)
  1535.                                                                 {
  1536.                                                                     MarkArea(-1,-1,-1);
  1537.  
  1538.                                                                     if(CurrentLine)
  1539.                                                                     {
  1540.                                                                         DisplayedLines = RedrawScreen(CurrentLine = 0);
  1541.  
  1542.                                                                         LastChar = 0;
  1543.  
  1544.                                                                         SetGadgetAttrs(Scroller,BufferWindow,NULL,
  1545.                                                                             PGA_Top,CurrentLine,
  1546.                                                                         TAG_DONE);
  1547.                                                                     }
  1548.  
  1549.                                                                     break;
  1550.                                                                 }
  1551.  
  1552.                                                                 if(Qualifier & (IEQUALIFIER_LSHIFT|IEQUALIFIER_RSHIFT))
  1553.                                                                 {
  1554.                                                                     LONG NewCurrentLine;
  1555.  
  1556.                                                                     if((NewCurrentLine = CurrentLine - NumBufferLines) < 0)
  1557.                                                                         NewCurrentLine = 0;
  1558.  
  1559.                                                                     MarkArea(-1,-1,-1);
  1560.  
  1561.                                                                     if(NewCurrentLine != CurrentLine)
  1562.                                                                     {
  1563.                                                                         DisplayedLines = RedrawScreen(CurrentLine = NewCurrentLine);
  1564.  
  1565.                                                                         LastChar = 0;
  1566.  
  1567.                                                                         SetGadgetAttrs(Scroller,BufferWindow,NULL,
  1568.                                                                             PGA_Top,CurrentLine,
  1569.                                                                         TAG_DONE);
  1570.                                                                     }
  1571.  
  1572.                                                                     break;
  1573.                                                                 }
  1574.  
  1575.                                                                 if(CurrentLine)
  1576.                                                                 {
  1577.                                                                     MarkArea(-1,-1,-1);
  1578.  
  1579.                                                                     DisplayedLines = RedrawScreen(--CurrentLine);
  1580.                                                                 }
  1581.  
  1582.                                                                 break;
  1583.  
  1584.                                                                 /* Scroll the buffer down. */
  1585.  
  1586.                                                             case CDN:
  1587.  
  1588.                                                                 if(Qualifier & IEQUALIFIER_CONTROL)
  1589.                                                                 {
  1590.                                                                     LONG NewCurrentLine;
  1591.  
  1592.                                                                     if((NewCurrentLine = Lines - NumBufferLines) < 0)
  1593.                                                                         NewCurrentLine = 0;
  1594.  
  1595.                                                                     MarkArea(-1,-1,-1);
  1596.  
  1597.                                                                     if(CurrentLine != NewCurrentLine)
  1598.                                                                     {
  1599.                                                                         DisplayedLines = RedrawScreen(CurrentLine = NewCurrentLine);
  1600.  
  1601.                                                                         LastChar = 0;
  1602.  
  1603.                                                                         SetGadgetAttrs(Scroller,BufferWindow,NULL,
  1604.                                                                             PGA_Top,CurrentLine,
  1605.                                                                         TAG_DONE);
  1606.                                                                     }
  1607.  
  1608.                                                                     break;
  1609.                                                                 }
  1610.  
  1611.                                                                 if(Qualifier & (IEQUALIFIER_LSHIFT|IEQUALIFIER_RSHIFT))
  1612.                                                                 {
  1613.                                                                     LONG NewCurrentLine;
  1614.  
  1615.                                                                     if((NewCurrentLine = CurrentLine + (2 * NumBufferLines)) > Lines)
  1616.                                                                         NewCurrentLine = Lines;
  1617.  
  1618.                                                                     if((NewCurrentLine = NewCurrentLine - NumBufferLines) < 0)
  1619.                                                                         NewCurrentLine = 0;
  1620.  
  1621.                                                                     MarkArea(-1,-1,-1);
  1622.  
  1623.                                                                     if(NewCurrentLine != CurrentLine)
  1624.                                                                     {
  1625.                                                                         DisplayedLines = RedrawScreen(CurrentLine = NewCurrentLine);
  1626.  
  1627.                                                                         LastChar = 0;
  1628.  
  1629.                                                                         SetGadgetAttrs(Scroller,BufferWindow,NULL,
  1630.                                                                             PGA_Top,CurrentLine,
  1631.                                                                         TAG_DONE);
  1632.                                                                     }
  1633.  
  1634.                                                                     break;
  1635.                                                                 }
  1636.  
  1637.                                                                 if(CurrentLine + NumBufferLines < Lines)
  1638.                                                                 {
  1639.                                                                     MarkArea(-1,-1,-1);
  1640.  
  1641.                                                                     DisplayedLines = RedrawScreen(++CurrentLine);
  1642.                                                                 }
  1643.  
  1644.                                                                 break;
  1645.                                                         }
  1646.  
  1647.                                                         LastQualifier = Qualifier;
  1648.                                                     }
  1649.                                                     else
  1650.                                                         LastQualifier = NULL;
  1651.  
  1652.                                                     continue;
  1653.                                                 }
  1654.  
  1655.                                                     /* User hit a mouse button. */
  1656.  
  1657.                                                 if(IClass == IDCMP_MOUSEBUTTONS && !(Code & IECODE_UP_PREFIX))
  1658.                                                 {
  1659.                                                     MarkArea(-1,-1,-1);
  1660.  
  1661.                                                         /* Reasonable dimensions? */
  1662.  
  1663.                                                     if(MouseY / LocalTextFontHeight < DisplayedLines && MouseX / LocalTextFontWidth < NumBufferColumns)
  1664.                                                     {
  1665.                                                         ObtainSemaphore(BufferSemaphore);
  1666.  
  1667.                                                         BufferClip();
  1668.  
  1669.                                                         LastTopLine = CurrentLine;
  1670.  
  1671.                                                         ReleaseSemaphore(BufferSemaphore);
  1672.  
  1673.                                                         if(Qualifier & (IEQUALIFIER_LSHIFT | IEQUALIFIER_RSHIFT))
  1674.                                                             Signal(ThisProcess,SIG_CLIP);
  1675.  
  1676.                                                         break;
  1677.                                                     }
  1678.                                                 }
  1679.  
  1680.                                                 if(IClass == IDCMP_MENUPICK)
  1681.                                                 {
  1682.                                                     struct MenuItem *MenuItem;
  1683.  
  1684.                                                     while(Code != MENUNULL)
  1685.                                                     {
  1686.                                                         MenuItem = ItemAddress(BufferMenuStrip,Code);
  1687.  
  1688.                                                         switch((ULONG)GTMENUITEM_USERDATA(MenuItem))
  1689.                                                         {
  1690.                                                             case MEN_SEARCH:
  1691.  
  1692.                                                                 StartBufferSearch(TRUE);
  1693.                                                                 break;
  1694.  
  1695.                                                             case MEN_REPEAT:
  1696.  
  1697.                                                                 StartBufferSearch(FALSE);
  1698.                                                                 break;
  1699.  
  1700.                                                             case MEN_GOTO:
  1701.  
  1702.                                                                 if(Window)
  1703.                                                                     BumpWindow(Window);
  1704.  
  1705.                                                                 break;
  1706.  
  1707.                                                             case MEN_QUITBUF:
  1708.                                                             case MEN_CLOSEBUF:
  1709.  
  1710.                                                                 BufferTerminated = TRUE;
  1711.                                                                 break;
  1712.  
  1713.                                                             case MEN_CLEARBUF_CONTENTS:
  1714.  
  1715.                                                                 if(Lines)
  1716.                                                                 {
  1717.                                                                     BlockWindows();
  1718.  
  1719.                                                                     BlockWindow(BufferWindow);
  1720.  
  1721.                                                                     if(Qualifier & (IEQUALIFIER_LSHIFT|IEQUALIFIER_RSHIFT))
  1722.                                                                     {
  1723.                                                                         FreeBuffer();
  1724.  
  1725.                                                                         ReleaseWindow(BufferWindow);
  1726.  
  1727.                                                                         ReleaseWindows();
  1728.  
  1729.                                                                         FlushMsg(BufferWindow);
  1730.  
  1731.                                                                         goto Restart;
  1732.                                                                     }
  1733.                                                                     else
  1734.                                                                     {
  1735.                                                                         if(MyEasyRequest(BufferWindow,LocaleString(MSG_TERMBUFFER_BUFFER_STILL_HOLDS_LINES_TXT),LocaleString(MSG_GLOBAL_YES_NO_TXT),Lines))
  1736.                                                                         {
  1737.                                                                             FreeBuffer();
  1738.  
  1739.                                                                             ReleaseWindow(BufferWindow);
  1740.  
  1741.                                                                             ReleaseWindows();
  1742.  
  1743.                                                                             FlushMsg(BufferWindow);
  1744.  
  1745.                                                                             goto Restart;
  1746.                                                                         }
  1747.                                                                     }
  1748.  
  1749.                                                                     ReleaseWindow(BufferWindow);
  1750.  
  1751.                                                                     ReleaseWindows();
  1752.  
  1753.                                                                     FlushMsg(BufferWindow);
  1754.                                                                 }
  1755.  
  1756.                                                                 break;
  1757.                                                         }
  1758.  
  1759.                                                         Code = MenuItem -> NextSelect;
  1760.                                                     }
  1761.                                                 }
  1762.  
  1763.                                             }
  1764.                                         }
  1765.                                         while(!BufferTerminated);
  1766.  
  1767.                                         RemoveGList(BufferWindow,Scroller,(UWORD)-1);
  1768.  
  1769.                                         DeleteScroller();
  1770.                                     }
  1771.  
  1772.                                     FreeVec(BufferLineWidths);
  1773.                                 }
  1774.  
  1775.                                 if(Window)
  1776.                                     BumpWindow(Window);
  1777.  
  1778.                                 MarkArea(-1,-1,-1);
  1779.  
  1780.                                 ScreenToBack(BufferScreen);
  1781.  
  1782.                                 BufferWindow -> Flags |= WFLG_RMBTRAP;
  1783.  
  1784.                                 ClearMenuStrip(BufferWindow);
  1785.  
  1786.                                 CloseWindow(BufferWindow);
  1787.                             }
  1788.                         }
  1789.  
  1790.                         FreeMenus(BufferMenuStrip);
  1791.                     }
  1792.  
  1793.                     FreeVisualInfo(BufferVisualInfo);
  1794.                 }
  1795.  
  1796.                 CloseScreen(BufferScreen);
  1797.             }
  1798.         }
  1799.  
  1800.         CloseFont(LocalFont);
  1801.     }
  1802.  
  1803.         /* Release the search buffer data. */
  1804.  
  1805.     if(BufferSearchInfo)
  1806.     {
  1807.         DeleteSearchInfo(BufferSearchInfo);
  1808.  
  1809.         BufferSearchInfo = NULL;
  1810.     }
  1811.  
  1812.     Forbid();
  1813.  
  1814.     BufferProcess = NULL;
  1815.  
  1816.     if(StartupMessage)
  1817.         ReplyMsg(StartupMessage);
  1818.     else
  1819.         Signal(ThisProcess,SIG_HANDSHAKE);
  1820. }
  1821.