{$WARN UNIT_PLATFORM OFF}
unit DownloadRequestForm;

interface

uses
   Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
   StdCtrls, ExtCtrls, IEDownload, ShellApi;

const
   mrOpen = mrYesToAll + 1;
   mrSave = mrOpen + 1;

type
   TDownloadRequest = class(TForm)
      btnOpen: TButton;
      btnSave: TButton;
      btnCancel: TButton;
      lbQuestion: TLabel;
      lbName: TLabel;
      lbType: TLabel;
      lbFrom: TLabel;
      imgIcon: TImage;
      lbNameTxt: TLabel;
      lbTypeTxt: TLabel;
      lbFromTxt: TLabel;
      dlgSave: TSaveDialog;
      lbSize: TLabel;
      lbSizeTxt: TLabel;
      procedure btnCancelClick(Sender: TObject);
      procedure btnOpenClick(Sender: TObject);
      procedure btnSaveClick(Sender: TObject);
      procedure FormDestroy(Sender: TObject);
   private
  { Private-Deklarationen }
      FDestPath: string;
      FSender: TIEDownload;
   public
  { Public-Deklarationen }
      procedure SetInfo(Sender: TIEDownload);
      property DestinationPath: string read FDestPath;
   end;

var
   DownloadRequest: TDownloadRequest;
   DontOpenThisExts, OpenOnlyThisExts: TStringList;

function CanOpen(FileExt: string): Boolean;
function StrFormatByteSize(dw: DWORD; szBuf: PChar; uiBufSize: UINT):
   PChar; stdcall; external 'shlwapi.dll' name 'StrFormatByteSizeA';
function StrFormatKBSize(qdw: LONGLONG; szBuf: PChar; uiBufSize: UINT):
   PChar; stdcall; external 'shlwapi.dll' name 'StrFormatKBSizeA';

implementation

uses DownloadForm_U;

{$R *.DFM}

function CanOpen(FileExt: string): Boolean;
begin
   Result := ((DontOpenThisExts.IndexOf(FileExt) < 0) and
      ((OpenOnlyThisExts.Count = 0) or (OpenOnlyThisExts.IndexOf(FileExt) >= 0)));
end;

procedure TDownloadRequest.SetInfo(Sender: TIEDownload);
var
   sfi: TSHFileInfo;
   arrSize: array[0..255] of Char;
begin
   FSender := Sender;
   lbFromTxt.Caption := Sender.Url;
   lbNameTxt.Caption := Sender.FileName;
   btnOpen.Enabled := CanOpen(Sender.FileExtension);
   if (Sender.FileSize > 0) then
      begin
         StrFormatByteSize(Sender.FileSize, arrSize, Length(arrSize) - 1);
         lbSizeTxt.Caption := Trim(arrSize);
      end
   else
      lbSizeTxt.Caption := 'unknown';

 // get file information
   ZeroMemory(@sfi, sizeof(sfi));
   if (SHGetFileInfo(
      PChar(Sender.FileName),
      FILE_ATTRIBUTE_NORMAL,
      sfi,
      sizeof(sfi),
      SHGFI_ICON or SHGFI_TYPENAME or SHGFI_USEFILEATTRIBUTES) <> 0) then
      begin
         if (sfi.hIcon <> 0) then
            imgIcon.Picture.Icon.Handle := sfi.hIcon;
         if (sfi.szTypeName[0] <> #0) then
            lbTypeTxt.Caption := sfi.szTypeName;
      end;
end;

procedure TDownloadRequest.btnCancelClick(Sender: TObject);
begin
   if FSender.State = sReady then
      DownloadForm.Close;
   Self.Close;
end;

procedure TDownloadRequest.btnOpenClick(Sender: TObject);
begin
   Self.ModalResult := mrOpen;
end;

procedure TDownloadRequest.btnSaveClick(Sender: TObject);
begin
   dlgSave.FileName := FSender.FileName;
   if (dlgSave.Execute) then
      begin
         FSender.FileName := ExtractFileName(dlgSave.FileName);
         FSender.DownloadFolder := ExtractFilePath(dlgSave.FileName);
         Self.ModalResult := mrSave;
      end;
end;

procedure TDownloadRequest.FormDestroy(Sender: TObject);
begin
   if (imgIcon.Picture.Icon.Handle <> 0) then
      DestroyIcon(imgIcon.Picture.Icon.Handle);
end;

initialization
   DontOpenThisExts := TStringList.Create();
   OpenOnlyThisExts := TStringList.Create();
finalization
   DontOpenThisExts.Free();
   OpenOnlyThisExts.Free();
end.