Вывести информацию о пакете

Delphi , Файловая система , DLL и PlugIns

Автор: Xavier Pacheco

program PkgInfo;

uses
  Forms,
  Dialogs,
  SysUtils,
  PkgMain in 'PkgMain.pas' {PackInfoForm};

{$R *.RES}

var
  OpenDialog: TOpenDialog;
begin
  if (ParamCount > 0) and FileExists(ParamStr(1)) then
    PkgName := ParamStr(1)
  else
  begin
    OpenDialog := TOpenDialog.Create(Application);
    OpenDialog.DefaultExt := '*.bpl';
    OpenDialog.Filter := 'Packages (*.bpl)|*.bpl|Delphi 3 Packages ' +
      '(*.dpl)|*.dpl';
    if OpenDialog.Execute then
      PkgName := OpenDialog.FileName;
  end;
  if PkgName <> '' then
  begin
    Application.Initialize;
    Application.CreateForm(TPackInfoForm, PackInfoForm);
    Application.Run;
  end;
end.

unit PkgMain;

interface

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

type
  TPackInfoForm = class(TForm)
    GroupBox1: TGroupBox;
    DsgnPkg: TCheckBox;
    RunPkg: TCheckBox;
    BuildCtl: TRadioGroup;
    GroupBox2: TGroupBox;
    GroupBox3: TGroupBox;
    Button1: TButton;
    Label1: TLabel;
    DescEd: TEdit;
    memContains: TMemo;
    memRequires: TMemo;
    procedure FormCreate(Sender: TObject);
    procedure Button1Click(Sender: TObject);
  end;

var
  PackInfoForm: TPackInfoForm;
  PkgName: string; // This is assigned in project file

implementation

{$R *.DFM}

procedure PackageInfoCallback(const Name: string; NameType: TNameType;
  Flags: Byte; Param: Pointer);
var
  AddName: string;
  Memo: TMemo;
begin
  Assert(Param <> nil);
  AddName := Name;
  case NameType of
    ntContainsUnit: Memo := TPackInfoForm(Param).memContains;
    ntRequiresPackage: Memo := TPackInfoForm(Param).memRequires;
  else
    Memo := nil;
  end;
  if (Memo <> nil) then
  begin
    if Memo.Text <> '' then
      AddName := ', ' + AddName;
    Memo.Text := Memo.Text + AddName;
  end;
end;

procedure TPackInfoForm.FormCreate(Sender: TObject);
var
  PackMod: HMODULE;
  Flags: Integer;
begin
  // Since we only need to get into the package's resources,
  // LoadLibraryEx with LOAD_LIBRARY_AS_DATAFILE provides a speed-
  // efficient means for loading the package.
  PackMod := LoadLibraryEx(PChar(PkgName), 0, LOAD_LIBRARY_AS_DATAFILE);
  if PackMod = 0 then
    Exit;
  try
    GetPackageInfo(PackMod, Pointer(Self), Flags, PackageInfoCallback);
  finally
    FreeLibrary(PackMod);
  end;
  Caption := 'Package Info: ' + ExtractFileName(PkgName);
  DsgnPkg.Checked := Flags and pfDesignOnly <> 0;
  RunPkg.Checked := Flags and pfRunOnly <> 0;
  if Flags and pfNeverBuild <> 0 then
    BuildCtl.ItemIndex := 1;
  DescEd.Text := GetPackageDescription(PChar(PkgName));
end;

procedure TPackInfoForm.Button1Click(Sender: TObject);
begin
  Close;
end;

end.

Статья Вывести информацию о пакете раздела Файловая система DLL и PlugIns может быть полезна для разработчиков на Delphi и FreePascal.

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