{
  Filter by File Mask
    This script allows filtering a collection using one or more file mask definitions

    Version 1.0
      Author: H van Zwietering
      Date: 10 may 2020
}

var
  FMask: WideString;
  AMaskEdit: TvxTextBox; 

procedure _SaveClick (Sender: Tobject);
var
  AElem: TidElement;
begin
  SaveDialog.Filter := 'File Mask Save Files|*.fsf';
  SaveDialog.DefaultExt := '.fsf';
  SaveDialog.InitialDir := DefaultAppDataDir + WideIncludeTrailingBackslash('Filters');
  if not SaveDialog.Execute then
    exit;

  AElem := TidElement.Create(nil);
  AElem.Prop['FilterMask']          := AMaskEdit.Text;
  AElem.SaveAsXMLFile(SaveDialog.FileName);
  AElem.Free;
end;

procedure _LoadClick (Sender: Tobject);
var
  AElem: TidElement;
begin
  OpenDialog.Filter     := 'File Mask Save Files|*.fsf';
  OpenDialog.DefaultExt := '.fsf';
  OpenDialog.InitialDir := DefaultAppDataDir + WideIncludeTrailingBackslash('Filters');
  if not OpenDialog.Execute then
    exit;
  AElem := TidElement.Create(nil);
  AElem.LoadFromXMLFile(OpenDialog.FileName);
  FMask     := '';
  FMask    := Nvl(AElem.Prop['FilterMask'], FMask);
  AElem.Free;

  AMaskEdit.Text := FMask;
end;

function BuildForm: TvxSceneForm;
var
  ALabel: TvxLabel;
  AEdit: TvxTextBox;
  AOk: TvxButton;
  ASave: TvxButton;
  ALoad: TvxButton;
begin
  result := TvxSceneForm.Create(nil);
  result.Caption  := 'Filter by File Mask';
  result.Position := poScreenCenter;
  result.Height := Round(200 * result.DPIFactor);

  ALabel := TvxLabel.Create(result.Root);
  result.Root.AddObject(ALabel);
  ALabel.Text := 'File Mask (use commas to separate multiple masks)';
  ALabel.TextAlign := vgTextAlignNear;
  ALabel.Position.Point := vgPoint(20, 20);
  ALabel.Width := 300;

  AEdit := TvxTextBox.Create(result.Root);
  result.Root.AddObject(AEdit);
  AEdit.Text := FMask;
  AEdit.Width := 200;
  AEdit.Position.Point := vgPoint(20, 40);
  AMaskEdit := AEdit;

  AOk := TvxButton.Create(result.Root);
  result.Root.AddObject(AOk);
  AOk.ModalResult := mrOk;
  AOk.Position.Point := vgPoint(20, (result.Height / result.DPIFactor) - 10 - AOk.Height);
  AOk.Text := 'OK';
  AOk.Default := True;

  ASave := TvxButton.Create(result.Root);
  result.Root.AddObject(ASave);
  ASave.OnClick := '_SaveClick';
  ASave.Position.Point := vgPoint((result.Width / result.DPIFactor) - 10 - ASave.Width, (result.Height / result.DPIFactor) - 10 - ASave.Height);
  ASave.Text := 'Save';

  ALoad := TvxButton.Create(result.Root);
  result.Root.AddObject(ALoad);
  ALoad.OnClick := '_LoadClick';
  ALoad.Position.Point := vgPoint(ASave.Position.X - 5 - ALoad.Width, (result.Height / result.DPIFactor) - 10 - ALoad.Height);
  ALoad.Text := 'Load';
end;

function Initialize: Boolean;
var
  AForm: TvxSceneForm;
begin
  result := True;

  FHit := 0;
  FMask    := '*.*';
  FMask    := ReadFromRegistry ('Scripts', 'FilterFileMask', FMask);

  AForm := BuildForm;
  AForm.ShowModal;
  result := (AForm.ModalResult = mrOk); 
  if result then
  begin
    FMask     := Trim(AMaskEdit.Text);
  end;
  AForm.Free;
end;

procedure Finalize;
begin
  MacroValuesPopup.Component := nil;

  WriteToRegistry ('Scripts', 'FilterFileMask', FMask);
end;

function Filter(AItem: TImageItem): Boolean;
var
  AFileName: WideString;
  AMaskList: TTntStringList;
  AMask: WideString;
  i: Integer;
begin
  result := False;
  if FMask = '' then
    exit;

  AFileName := AItem.FileNameOnly;
  AMaskList := TTntStringList.Create;
  try
    Tokenize(FMask, ',', AMaskList);
    for i := 0 to AMaskList.Count - 1 do
    begin
      AMask := AMaskList.Strings[i];
      result := WideMatchesMask(AFileName, AMask);
      if result then 
        break;
    end;
  finally
    AMaskList.Free;
  end;
end;