Subversion Repositories delphiutils

unit AsciiTable;

(*

 * ASCII Table and CSV Generator Delphi Unit

 * Revision 2022-07-09

 *

 * (C) 2022 Daniel Marschall, HickelSOFT, ViaThinkSoft

 * Licensed under the terms of Apache 2.0

 *)

{

Example usage:

uses

  AsciiTable, ContNrs;

procedure TForm1.Button1Click(Sender: TObject);

var

  VirtTable: TVtsAsciiTable;

  objLine: TVtsAsciiTableLine;

begin

  VirtTable := TVtsAsciiTable.Create(true);

  VirtTable.Clear;

  // Create Test data

  objLine := TVtsAsciiTableLine.Create;

  objLine.SetVal(0, 'Fruit', taCenter);

  objLine.SetVal(1, 'Amount', taCenter);

  VirtTable.Add(objLine);

  VirtTable.AddSeparator;

  objLine := TVtsAsciiTableLine.Create;

  objLine.SetVal(0, 'Apple', taLeftJustify);

  objLine.SetVal(1, '123', taRightJustify);

  VirtTable.Add(objLine);

  objLine := TVtsAsciiTableLine.Create;

  objLine.SetVal(0, 'Kiwi', taLeftJustify);

  objLine.SetVal(1, '1', taRightJustify);

  VirtTable.Add(objLine);

  objLine := TVtsAsciiTableLine.Create;

  objLine.SetVal(0, 'Asparagus (green)', taLeftJustify);

  objLine.SetVal(1, '9999', taRightJustify);

  VirtTable.Add(objLine);

  objLine := TVtsAsciiTableLine.Create;

  objLine.SetVal(0, 'Asparagus (white)', taLeftJustify);

  objLine.SetVal(1, '999', taRightJustify);

  VirtTable.Add(objLine);

  // Create ASCII table

  Memo1.Clear;

  VirtTable.GetASCIITable(Memo1.Lines);

  // Save ASCII table

  VirtTable.SaveASCIITable('Order.txt');

  // Create CSV

  Memo2.Clear;

  VirtTable.GetCSV(Memo2.Lines);

  // Save CSV

  VirtTable.SaveCSV('Order.csv');

  VirtTable.Free;

end;

}

interface

uses

  ContNrs, Classes, SysUtils;

const

  VTS_ASCII_TABLE_COLS = 10;

type

  TVtsAsciiTableLine = class(TObject)

  public

    Cont: array[0..VTS_ASCII_TABLE_COLS-1] of string;

    Align: array[0..VTS_ASCII_TABLE_COLS-1] of TAlignment;

    PadChar: array[0..VTS_ASCII_TABLE_COLS-1] of char;

    procedure Clear;

    procedure SetVal(index: integer; ACont: string; AAlign: TAlignment=taLeftJustify; APadChar: char=' ');

  end;

  TVtsAsciiTableAnalysis = record

    MaxLen: array[0..VTS_ASCII_TABLE_COLS-1] of integer;

    Used: array[0..VTS_ASCII_TABLE_COLS-1] of boolean;

    Width: integer;

  end;

  TVtsAsciiTable = class(TObjectList{<TVtsAsciiTableLine>})

  private

    function GetItem(Index: Integer): TVtsAsciiTableLine;

    procedure SetItem(Index: Integer; const Value: TVtsAsciiTableLine);

  public

    function GetAnalysis: TVtsAsciiTableAnalysis;

    procedure GetASCIITable(sl: TStrings; spaceBetween: integer=3);

    procedure SaveASCIITable(filename: string; spaceBetween: integer=3);

    procedure GetCSV(sl: TStrings);

    procedure SaveCSV(filename: string);

    procedure AddSeparator;

    // Just a little bit type-safe... The rest stays TObject for now

    function Add(AObject: TVtsAsciiTableLine): Integer; reintroduce;

    property Items[Index: Integer]: TVtsAsciiTableLine read GetItem write SetItem;

    procedure Insert(Index: Integer; AObject: TVtsAsciiTableLine); reintroduce;

  end;

implementation

{ TVtsAsciiTable }

function TVtsAsciiTable.Add(AObject: TVtsAsciiTableLine): Integer;

begin

  result := Inherited Add(AObject);

end;

procedure TVtsAsciiTable.AddSeparator;

begin

  Inherited Add(nil);

end;

function TVtsAsciiTable.GetAnalysis: TVtsAsciiTableAnalysis;

var

  j: Integer;

  i: Integer;

  objLine: TVtsAsciiTableLine;

  len: Integer;

begin

  for j := 0 to VTS_ASCII_TABLE_COLS-1 do

  begin

    result.MaxLen[j] := 0;

    result.Used[j] := false;

  end;

  for i := 0 to Self.Count-1 do

  begin

    objLine := Self.items[i] as TVtsAsciiTableLine;

    if objLine <> nil then

    begin

      for j := 0 to VTS_ASCII_TABLE_COLS-1 do

      begin

        len := Length(objLine.Cont[j]);

        if len > result.MaxLen[j] then

          result.MaxLen[j] := len;

        if len > 0 then

          result.Used[j] := true;

      end;

    end;

  end;

end;

procedure TVtsAsciiTable.GetASCIITable(sl: TStrings; spaceBetween: integer=3);

var

  analysis: TVtsAsciiTableAnalysis;

  objLine: TVtsAsciiTableLine;

  i: Integer;

  sLine: string;

  j: Integer;

  itmp: Integer;

  padchar: Char;

  firstcol: boolean;

  width: Integer;

begin

  analysis := GetAnalysis;

  //sl.Clear;

  for i := 0 to Self.Count-1 do

  begin

    objLine := Self.items[i] as TVtsAsciiTableLine;

    sLine := '';

    if objLine <> nil then

    begin

      firstcol := true;

      for j := 0 to VTS_ASCII_TABLE_COLS-1 do

      begin

        if not analysis.Used[j] then continue;

        padchar := objLine.PadChar[j];

        if padchar = #0 then padchar := ' ';

        if firstcol then

          firstcol := false

        else

          sLine := sLine + StringOfChar(' ', spaceBetween);

        if objLine.Align[j] = taRightJustify then

        begin

          sLine := sLine + StringOfChar(padchar, analysis.MaxLen[j]-Length(objLine.Cont[j]));

          sLine := sLine + objLine.Cont[j];

        end

        else if objLine.Align[j] = taLeftJustify then

        begin

          sLine := sLine + objLine.Cont[j];

          sLine := sLine + StringOfChar(padchar, analysis.MaxLen[j]-Length(objLine.Cont[j]));

        end

        else if objLine.Align[j] = taCenter then

        begin

          if Odd(analysis.MaxLen[j]-Length(objLine.Cont[j])) then itmp := 1 else itmp := 0;

          sLine := sLine + StringOfChar(padchar, (analysis.MaxLen[j]-Length(objLine.Cont[j])) div 2);

          sLine := sLine + objLine.Cont[j];

          sLine := sLine + StringOfChar(padchar, (analysis.MaxLen[j]-Length(objLine.Cont[j])) div 2 + itmp);

        end

        else

          Assert(false);

      end;

    end

    else

    begin

      firstcol := true;

      width := 0;

      for j := 0 to VTS_ASCII_TABLE_COLS-1 do

      begin

        if not analysis.Used[j] then continue;

        if firstcol then

          firstcol := false

        else

          width := width + spaceBetween;

        width := width + analysis.MaxLen[j];

      end;

      sLine := sLine + StringOfChar('-', Width);

    end;

    sl.Add(sLine);

  end;

end;

function CsvQuoteStr(s: string): string;

begin

  s := StringReplace(s, #13#10, ' ', [rfReplaceAll]);

  s := StringReplace(s, #13, ' ', [rfReplaceAll]);

  s := StringReplace(s, #10, ' ', [rfReplaceAll]);

  if s = '' then

    result := ''

  else if (AnsiPos('"', s)>0) or (AnsiPos('''', s)>0) or (AnsiPos(';', s)>0) or

          (AnsiPos(#9, s)>0) or (AnsiPos(' ', s)>0) then

    result := '"' + StringReplace(s, '"', '""', [rfReplaceAll]) + '"'

  else

    result := s;

end;

procedure TVtsAsciiTable.GetCSV(sl: TStrings);

var

  analysis: TVtsAsciiTableAnalysis;

  objLine: TVtsAsciiTableLine;

  i: Integer;

  sLine: string;

  j: Integer;

  firstcol: boolean;

begin

  analysis := GetAnalysis;

  //sl.Clear;

  for i := 0 to Self.Count-1 do

  begin

    objLine := Self.items[i] as TVtsAsciiTableLine;

    if objLine = nil then continue;

    sLine := '';

    firstcol := true;

    for j := 0 to VTS_ASCII_TABLE_COLS-1 do

    begin

      if not analysis.Used[j] then continue;

      if firstcol then

        firstcol := false

      else

        sLine := sLine + ';';

      sLine := sLine + CsvQuoteStr(objLine.Cont[j]);

    end;

    sl.Add(sLine);

  end;

end;

function TVtsAsciiTable.GetItem(Index: Integer): TVtsAsciiTableLine;

begin

  result := (Inherited Items[Index]) as TVtsAsciiTableLine;

end;

procedure TVtsAsciiTable.Insert(Index: Integer; AObject: TVtsAsciiTableLine);

begin

  Inherited Insert(Index, AObject);

end;

procedure TVtsAsciiTable.SaveASCIITable(filename: string;

  spaceBetween: integer);

var

  sl: TStringList;

begin

  sl := TStringList.Create;

  try

    GetASCIITable(sl, spaceBetween);

    sl.SaveToFile(filename);

  finally

    FreeAndNil(sl);

  end;

end;

procedure TVtsAsciiTable.SaveCSV(filename: string);

var

  sl: TStringList;

begin

  sl := TStringList.Create;

  try

    GetCSV(sl);

    sl.SaveToFile(filename);

  finally

    FreeAndNil(sl);

  end;

end;

procedure TVtsAsciiTable.SetItem(Index: Integer; const Value: TVtsAsciiTableLine);

begin

  Inherited Items[Index] := Value;

end;

{ TVtsAsciiTableLine }

procedure TVtsAsciiTableLine.Clear;

var

  i: Integer;

begin

  for i := 0 to VTS_ASCII_TABLE_COLS-1 do

  begin

    PadChar[i] := #0;

    Align[i] := taLeftJustify;

    Cont[i] := '';

  end;

end;

procedure TVtsAsciiTableLine.SetVal(index: integer; ACont: string;

  AAlign: TAlignment=taLeftJustify; APadChar: char=' ');

begin

  Self.Cont[index] := ACont;

  Self.Align[index] := AAlign;

  Self.PadChar[index] := APadChar;

end;

end.