{$V-}
Program Print_Help;

{ This program prints ZCPR V3.0 Help files on your printer. It will
  strip off the eigth bit on help files processed by WordStar (TM
  micropro) and recurse down the help tree to get all of the files.
  If you define BF_On and BF_Off the portions of the help file in
  standout mode (ie preceeded by ^A and trailed by ^B) will be printed
  in with those two strings surrounding them.

  Written By: Chuck McManis, August 16th 1985
  Do with it what you will but don't ask me to support your changes.
  }

Const
  MaxHelp  = 16;
{
  (* I use these for the Mannesmann Tally 160L *)
  BF_On = ^['[=z';                (* Turn on Enhanced Print (BoldFace) *)
  BF_Off = ^['[>z';               (* Turn off Enhanced Print (Boldface) *)
  Lst_Init = ^['[1y'^['[5y';      (* Initialization String *)
  Lst_Exit = ^['[0y'^['[4w';      (* Deinitialization String *)
  UL_On = ^['[4m';                (* Start Underlining Characters *)
  UL_Off = ^['[0m';               (* Stop Underlining Characters *)
}
  Lst_Init = '';      (* Initialization String *)
  Lst_Exit = '';      (* Deinitialization String *)
  BF_On = '';
  BF_Off = '';
  UL_On = '';
  UL_Off = '';
  Page_Length = 66;   (* Define these for your printer *)
  CanFormFeed = False;
  Left_Margin = 4;
  Bottom_Margin = 5;
  TabWidth = 8;

Type
  AnyString = String[255];

Var
  Line_Buf, Header : AnyString;
  Helpfiles : Array [0..MaxHelp] of Text;
  Page_Num,Current_Line,CurFile, I, J, K : Integer;
  HelpFileName, TempName : String[20];
  HasType : Boolean;

{ Getfile will check the CP/M Command line to see if the user typed a filename
  after the command that invoked us, if not a filename will be specifically
  asked for. }

Procedure GetFile;

  Begin
    For I := 1 to 15 do HelpFileName[I] := ' ';
    If (Mem[$80]=0) or (Mem[$80]=$FF) Then
      Begin
        Write('Enter Help file to print : ');
        Readln(HelpFileName);
      End
    Else
    Begin
      For I := 1 to Mem[$80] Do
        HelpFileName[I] := Chr(Mem[I+$80]);
      HelpFileName[0] := Chr(Mem[$80]);
    End;
    Assign(HelpFiles[0],HelpFileName);
    Reset(HelpFiles[0]);
    Writeln('Printing Help file ',HelpFileName:Length(HelpFileName));
  End; (* GetFile *)

{ This function does two things, first it checks to see if the input character
  was a ^A (Boldface ON) or ^B (Boldface OFF) control, and if it is replace
  it with the appropriate escape sequence. Second, if it is a <TAB> character
  it inserts enough spaces to emulate the tab and throws the tab away.
}

Function Format(Our_String : AnyString) : AnyString;

Var
  I, Column : Integer;
  Tmp_string : AnyString;
  New_Char : Char;

Begin
  Column := 0;
  Tmp_String := '';
  For I := 1 to Length(Our_String) do
  Begin
    Case Our_String[I] of
      ^A : Tmp_String := Tmp_String + BF_On;
      ^B : Tmp_String := Tmp_String + BF_Off;
      ^I : Begin
             Repeat
               Tmp_String := Tmp_String + ' ';
               Column := Column + 1;
             Until ((Column Mod TabWidth) = 0);
           End;
      Else
      Begin
        Tmp_String := Tmp_String + Our_String[I];
        Column := Column + 1;
      End;
    End; (* Case *)
  End; (* For Loop *)
  Format := Tmp_String;
End;

{ This routine gets data from the file. Since a lot of the help files have
  been created using Wordstar (TM MicroPro) They have bit 7 set on some
  characters. This can really confuse Turbo so this routine fills in for
  what Readln should really be able to do. It gets single characters and
  masks off Bit 7, then (if it detects a <CR>) it passes it on to the
  main code.
}
Procedure GetLine(Var Line : AnyString);

Var
  Next_Chr : Char;
  Done : Boolean;

Begin
  Line := '';
  Done := False;
  Repeat
    Read(HelpFiles[CurFile],Next_Chr);
    If Eoln(Helpfiles[CurFile]) Then
    Begin
      Readln(HelpFiles[CurFile]);
      Done := True;
    End;
    Next_Chr := Chr(Ord(Next_Chr) And $7F);
    If Next_Chr = ^M then
    Begin
      Done := True;
      Read(HelpFiles[CurFile],Next_Chr); { Eat the Line feed }
    End
    Else
      If (Next_Chr <> ^J) And (Next_Chr <> ^L) Then
        Line := Line + Next_Chr;
  Until Done or Eof(HelpFiles[CurFile]);
End;

{ Advance Printer to the Next Page. This actually advances the printer and
  Prints the header. The header is composed of either the file name or the
  latest information section that was processed. If you have set CanFormFeed
  to FALSE above it will fake a form feed by printing enough <LF> characters
  to make up a page.
}
Procedure Form_Feed;

Begin
  If CanFormFeed Then
    Writeln(LST,^L)
  Else
    While (Current_Line Mod Page_Length) <> 0 do
    Begin
      Writeln(LST);
      Current_Line := Current_Line + 1;
    End;
  Current_Line := 4;
  Writeln(LST);
  Writeln(LST,' ':Left_Margin,Header,' ':60-(Length(Header)+Left_Margin),
              'Page ',Page_Num:3);
  Writeln(LST);
  Writeln(LST);
  Page_Num := Page_Num + 1;
End;

{ Print a line to the printer and add in the leftmargin if defined above. The
  purpose of the left margin is to skip over holes in the paper that allow the
  sheets to be stored in a 3 ring binder.
}
Procedure Print(Line : AnyString);

Begin
  Writeln(LST,' ':Left_Margin,Line);
  Current_Line := Current_Line + 1;
  If (Current_Line Mod (Page_Length - Bottom_Margin)) = 0 Then Form_Feed;
End;

{ * * * * - -   M A I N   C O D E   - - * * * * }
Begin
  GetFile;
  CurFile := 0;
  Page_Num := 1;
  Current_Line := 0;
  Write(LST,Lst_Init);
  Header := 'Helpfile ' + HelpfileName;
  Form_Feed;
  Repeat
    If Eof(HelpFiles[CurFile]) Then
    Begin
      Close(HelpFiles[CurFile]);
      CurFile := CurFile - 1;
      If CurFile = -1 Then CurFile := 0;
    End
    Else
      GetLine(Line_Buf);
    Line_Buf := Format(Line_Buf);
    If Length(Line_Buf) = 0 Then Print('')
    Else
    Begin
      If Line_Buf[1] = ':' Then
      Begin
        J := 0;
        For I := 2 to Length(Line_Buf) do
          If (Line_Buf[I] = ':') And (J = 0) Then J := I;
        If J <> 0 Then
        Begin
          CurFile := CurFile + 1;
          HelpFileName := Copy(Line_Buf,J+1,20);
          HasType := False;
          For I := 1 to Length(HelpFileName) do
            If HelpFileName[I] = '.' Then HasType := True;
          If Not HasType Then HelpFileName := helpfilename + '.HLP';
          Writeln('Opening file "',HelpFileName,'"');
          Assign(HelpFIles[Curfile],HelpFIlename);
          Reset(HelpFiles[CurFile]);
          Header := 'Subfile ' + HelpFileName;
          Form_Feed;
        End (* If : J <> 0 *)
        Else
        Begin
          Header := Copy(Line_Buf,2,40);
          Print('');
          Print(UL_On+Header+UL_Off);
          Print('');
        End; (* Else : Line_Buf[2] = ':' *)
      End (* If Line_Buf[1] = ':' *)
      Else
      Begin
        If Line_Buf <> ^L Then Print(Line_Buf);
      End; (* Else *)
    End; (* Else : Length > 0 *)
  Until (CurFile = 0) And (Eof(HelpFIles[0]));
  Writeln(LST,Lst_Exit);
End.