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{*****************************************}
{ }
{ FastReport v2.3 }
{ Text export filter }
{ }
{ Copyright (c) 1998-99 by Tzyganenko A. }
{ }
{*****************************************}
unit LR_E_TXT;
interface
{$I lr_vers.inc}
uses
Classes, SysUtils, LazUTF8, LResources, Graphics, GraphType, Controls, Forms,
Dialogs, LCLType, LCLIntf, LR_Class;
type
{ TfrTextExport }
TfrTextExport = class(TComponent)
private
function GetShowExportParamsDlg: boolean;
procedure SetShowExportParamsDlg(AValue: boolean);
public
constructor Create(aOwner: TComponent); override;
published
property ShowExportParamsDlg:boolean read GetShowExportParamsDlg write SetShowExportParamsDlg;
end;
{ TfrTextExportFilter }
TfrTextExportFilter = class(TfrExportFilter)
private
FUseBOM: boolean;
FUsedFont: Integer;
FDeleteEmptyLine: boolean;
FPageBreaks: boolean;
protected
procedure GetUsedFont; virtual;
function Setup:boolean; override;
procedure NewRec(View: TfrView; const AText:string; var p:pointer); override;
procedure CalcXCoords(var {%H-}x,{%H-}w: integer); virtual;
function CheckView(View: TfrView): boolean; override;
public
constructor Create(AStream: TStream); override;
procedure OnBeginDoc; override;
procedure OnEndPage; override;
procedure OnBeginPage; override;
procedure OnText({%H-}X, Y: Integer; const Text: String; View: TfrView); override;
property UsedFont: integer read FUsedFont write FUsedFont;
property UseBOM: boolean read FUseBOM write FUseBOM;
end;
implementation
uses LR_Const, LR_E_TXT_Params;
var
FShowExportParamsDlg: boolean;
procedure TfrTextExportFilter.GetUsedFont;
var
s: String;
n: Integer;
begin
s := InputBox(sFilter, sFilterParam, '10');
Val(s, FUsedFont, n);
if n<>0 then
FUsedFont := 10;
end;
function TfrTextExportFilter.Setup: boolean;
var
lrExpTxtParamsForm: TlrExpTxtParamsForm;
begin
Result:=inherited Setup;
if FUsedFont<=0 then
GetUsedFont;
if FShowExportParamsDlg then
begin
lrExpTxtParamsForm:=TlrExpTxtParamsForm.Create(Application);
lrExpTxtParamsForm.CheckBox1.Checked:=FDeleteEmptyLine;
lrExpTxtParamsForm.CheckBox2.Checked:=FPageBreaks;
Result:=lrExpTxtParamsForm.ShowModal = mrOk;
if Result then
begin
FPageBreaks:=lrExpTxtParamsForm.CheckBox2.Checked;
FDeleteEmptyLine:=lrExpTxtParamsForm.CheckBox1.Checked;
end;
lrExpTxtParamsForm.Free;
end;
end;
procedure TfrTextExportFilter.NewRec(View: TfrView; const AText: string;
var p:pointer);
begin
inherited NewRec(View, AText, p);
CalcXCoords(PfrTextRec(p)^.X, PfrTextRec(p)^.W);
end;
procedure TfrTextExportFilter.CalcXCoords(var x, w: integer);
begin
end;
function TfrTextExportFilter.CheckView(View: TfrView): boolean;
begin
Result:= View.Typ in [gtMemo,gtAddin];
end;
constructor TfrTextExportFilter.Create(AStream: TStream);
begin
inherited;
FUsedFont := 10;
FUseBOM := false;
FPageBreaks:=true;
FDeleteEmptyLine:=false;
end;
procedure TfrTextExportFilter.OnBeginDoc;
begin
if FUseBOM then begin
Stream.WriteByte($EF);
Stream.WriteByte($BB);
Stream.WriteByte($BF);
end;
end;
procedure TfrTextExportFilter.OnEndPage;
var
i, n, x, tc1: Integer;
p: PfrTextRec;
s: String;
function Dup(Count: Integer): String;
var
i: Integer;
begin
Result := '';
for i := 1 to Count do
Result := Result + ' ';
end;
begin
n := Lines.Count - 1;
while n >= 0 do
begin
if Lines[n] <> nil then
break;
Dec(n);
end;
for i := 0 to n do
begin
s := '';
tc1:= 0;
p := PfrTextRec(Lines[i]);
while p <> nil do
begin
x := Round(p^.X / 6.5);
s := s + Dup(x - tc1) + p^.Text;
tc1:= x + UTF8Length(p^.Text);
p := p^.Next;
end;
if FDeleteEmptyLine and (S = '') then
Continue;
if FPageBreaks then
begin
S :=S+ #12+LineEnding;
Stream.Write(s[1], Length(s));
end;
end;
s := #12+LineEnding;
Stream.Write(s[1], Length(s));
end;
procedure TfrTextExportFilter.OnBeginPage;
var
i: integer;
begin
ClearLines;
for i := 0 to 200 do
Lines.Add(nil);
end;
procedure TfrTextExportFilter.OnText(X, Y: Integer; const Text: String;
View: TfrView);
var
p: PfrTextRec;
begin
if View = nil then
Exit;
Y := Round(Y / UsedFont);
p:=nil;
NewRec(View, Text, p);
AddRec(Y, p);
end;
{ TfrTextExport }
function TfrTextExport.GetShowExportParamsDlg: boolean;
begin
Result:=FShowExportParamsDlg;
end;
procedure TfrTextExport.SetShowExportParamsDlg(AValue: boolean);
begin
FShowExportParamsDlg:=AValue;
end;
constructor TfrTextExport.Create(aOwner: TComponent);
begin
inherited Create(aOwner);
frRegisterExportFilter(TfrTextExportFilter, sTextFile + ' (*.txt)', '*.txt');
end;
end.
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