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(* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is TurboPower SysTools
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*
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* The Initial Developer of the Original Code is
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* TurboPower Software
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*
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* Portions created by the Initial Developer are Copyright (C) 1996-2002
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* ***** END LICENSE BLOCK ***** *)
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unit ExTextU;
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interface
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uses
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Windows, Messages, SysUtils, Classes, Graphics, Controls,
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Forms, Dialogs, StdCtrls;
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type
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TSTDlg = class(TForm)
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Memo1: TMemo;
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OD1: TOpenDialog;
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LoadBtn: TButton;
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SeekBtn: TButton;
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FlushBtn: TButton;
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Label1: TLabel;
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Edit1: TEdit;
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Label2: TLabel;
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Edit2: TEdit;
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Label3: TLabel;
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Edit3: TEdit;
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Edit4: TEdit;
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CloseFBtn: TButton;
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procedure LoadBtnClick(Sender: TObject);
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procedure SeekBtnClick(Sender: TObject);
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procedure Memo1KeyUp(Sender: TObject; var Key: Word;
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Shift: TShiftState);
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procedure Memo1MouseUp(Sender: TObject; Button: TMouseButton;
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Shift: TShiftState; X, Y: Integer);
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procedure FlushBtnClick(Sender: TObject);
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procedure CloseFBtnClick(Sender: TObject);
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procedure FormCreate(Sender: TObject);
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procedure FormClose(Sender: TObject; var Action: TCloseAction);
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procedure FormShow(Sender: TObject);
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private
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{ Private declarations }
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public
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{ Public declarations }
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procedure UpdatePos;
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procedure UpdateButtons(FOK : Boolean);
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end;
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var
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STDlg: TSTDlg;
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implementation
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{$R *.DFM}
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uses
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StConst,
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StBase,
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StText;
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var
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F : TextFile;
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AFO : Boolean;
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procedure TSTDlg.UpdateButtons(FOK : Boolean);
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begin
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CloseFBtn.Enabled := FOK;
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SeekBtn.Enabled := FOK;
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FlushBtn.Enabled := FOK;
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end;
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procedure TSTDlg.FormCreate(Sender: TObject);
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begin
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UpdateButtons(False);
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AFO := False;
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end;
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procedure TSTDlg.LoadBtnClick(Sender: TObject);
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var
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S : string;
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hC : HCursor;
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begin
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if (OD1.Execute) then
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begin
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if (AFO) then
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CloseFile(F);
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AFO := False;
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AssignFile(F,OD1.FileName);
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ReSet(F);
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Memo1.Enabled := True;
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Memo1.Perform(WM_SETREDRAW,0,0);
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hC := SetCursor(LoadCursor(0,IDC_WAIT));
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while NOT EOF(F) do
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begin
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Readln(F,S);
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Memo1.Lines.Add(S);
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end;
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Memo1.Perform(WM_SETREDRAW,1,0);
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Memo1.Update;
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Memo1.SelStart := 0;
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Memo1.SelLength := 0;
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Reset(F);
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Edit1.Text := OD1.FileName;
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Edit2.Text := IntToStr(TextFileSize(F));
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Edit3.Text := IntToStr(TextPos(F));
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SetCursor(hC);
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Memo1.SetFocus;
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AFO := True;
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end;
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UpdateButtons(AFO);
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end;
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procedure TSTDlg.CloseFBtnClick(Sender: TObject);
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begin
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CloseFile(F);
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Memo1.Clear;
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AFO := False;
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UpdateButtons(False);
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end;
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procedure TSTDlg.SeekBtnClick(Sender: TObject);
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var
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NP : LongInt;
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begin
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NP := StrToInt(Edit4.Text);
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Memo1.SetFocus;
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if (NP < 0) OR (NP >= TextFileSize(F)) then
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begin
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ShowMessage('Value out of range');
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Exit;
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end;
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if TextSeek(F,NP) then
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begin
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NP := TextPos(F);
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Memo1.SelStart := NP;
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Memo1.SelLength := 0;
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Edit3.Text := IntToStr(NP);
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end else
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begin
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ShowMessage('Unable to seek to position');
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Memo1.SetFocus;
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end;
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end;
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procedure TSTDlg.Memo1KeyUp(Sender: TObject; var Key: Word;
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Shift: TShiftState);
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begin
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UpdatePos;
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end;
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procedure TSTDlg.Memo1MouseUp(Sender: TObject; Button: TMouseButton;
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Shift: TShiftState; X, Y: Integer);
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begin
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UpdatePos;
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end;
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procedure TSTDlg.UpdatePos;
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var
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CP : LongInt;
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begin
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CP := Memo1.SelStart;
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if NOT TextSeek(F,CP) then
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begin
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ShowMessage('Unable to update file pointer');
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Exit;
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end;
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Edit3.Text := IntToStr(TextPos(F));
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end;
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procedure TSTDlg.FlushBtnClick(Sender: TObject);
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begin
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if NOT (TextFlush(F)) then
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begin
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ShowMessage('Unable to flush file');
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end;
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Memo1.SetFocus;
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end;
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procedure TSTDlg.FormClose(Sender: TObject; var Action: TCloseAction);
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begin
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if AFO then CloseFile(F);
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end;
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procedure TSTDlg.FormShow(Sender: TObject);
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begin
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LoadBtn.SetFocus;
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end;
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end.
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