{ $OPT=-S2 }

{
    $Id$
    This file is part of the Free Pascal run time library.
    Copyright (c) 1993,97 by the Free Pascal development team.

    See the file COPYING.FPC, included in this distribution,
    for details about the copyright.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

 **********************************************************************}
{
  This unit introduces some basic classes as they are defined in Delphi.
  These classes should be source compatible to their Delphi counterparts:
    TPersistent
    TComponent
}

Unit Classes;

{$M+}

Interface 

Type

{ --------------------------------------------------------------------- 
    Forward Declarations.
  ---------------------------------------------------------------------}
  
  TComponent = Class;
  TFiler = Class;
  TPersistent = Class;

{ ---------------------------------------------------------------------
    TFiler
  ---------------------------------------------------------------------}

  TFiler = Class (TObject)
    Protected
      FAncestor : TComponent;
      FIgnoreChildren : Boolean;
      FRoot : TComponent;
    Private
    Public
    Published
      { Methods }
      Constructor Create {(Stream : TStream; BufSize : Longint) };
      Destructor Destroy; override;
      Procedure FlushBuffer; virtual; abstract;
      { Properties }
      Property Root : TComponent Read FRoot Write FRoot;
      Property Ancestor : TComponent Read FAncestor Write FAncestor;
      Property IgnoreChildren : Boolean Read FIgnoreChildren Write FIgnoreChildren;
    end;

{ ---------------------------------------------------------------------
    TPersistent
  ---------------------------------------------------------------------}

  TPersistent = Class (TObject)
    Private
      Procedure AssignError (Source : TPersistent);
    Protected
      Procedure AssignTo (Dest : TPersistent);
      Procedure DefineProperties (Filer : TFiler); Virtual;
    Public
      { Methods }
      Destructor Destroy; Override;
      Procedure Assign (Source : TPersistent); virtual;
    Published
    end;

{ ---------------------------------------------------------------------
    TComponent 
  ---------------------------------------------------------------------}

  TComponentState = Set of ( csLoading, csReading, CsWriting, csDestroying, 
                             csDesigning, csAncestor, csUpdating, csFixups ); 
  TComponentStyle = set of ( csInheritable,csCheckPropAvail );
  TComponentName = String;
    
  TComponent = Class (TPersistent)
    Protected
      FComponentState : TComponentState;
      FComponentStyle : TComponentStyle;
      FName : TComponentName;

      FOwner : TComponent;
      Function GetComponent (Index : Longint) : TComponent;
      Function GetComponentCount : Longint;
      Function GetComponentIndex : Longint;
      Procedure SetComponentIndex (Value : Longint);
      Procedure Setname (Value : TComponentName);
    Private
    Public
      { Methods }
      { Properties }
      Property ComponentCount : Longint Read GetComponentCount; { RO  }
      Property ComponentIndex : Longint Read GetComponentIndex write SetComponentIndex; { R/W }
      // Property Components [Index : LongInt] : TComponent Read GetComponent; { R0 }
      Property ComponentState : TComponentState Read FComponentState; { RO }
      Property ComponentStyle : TcomponentStyle Read FComponentStyle; { RO }
      Property Owner : TComponent Read Fowner; { RO }
    Published
      Property Name : TComponentName Read FName Write Setname;
    end;




Implementation

{ ---------------------------------------------------------------------
    TComponent 
  ---------------------------------------------------------------------}

Function TComponent.GetComponent (Index : Longint) : TComponent;

begin
end;



Function TComponent.GetComponentCount : Longint;

begin
end;



Function TComponent.GetComponentIndex : Longint;

begin
end;



Procedure TComponent.SetComponentIndex (Value : Longint);

begin
end;




Procedure TComponent.Setname (Value : TComponentName);

begin
end;



{ ---------------------------------------------------------------------
    TFiler
  ---------------------------------------------------------------------}

Constructor TFiler.Create {(Stream : TStream; BufSize : Longint) };

begin
end;




Destructor TFiler.Destroy;

begin
end;




{ ---------------------------------------------------------------------
    TPersistent
  ---------------------------------------------------------------------}

Procedure TPersistent.AssignError (Source : TPersistent);

begin
end;



Procedure TPersistent.AssignTo (Dest : TPersistent);

begin
end;



Procedure TPersistent.DefineProperties (Filer : TFiler);

begin
end;



Destructor TPersistent.Destroy;

begin
end;



Procedure TPersistent.Assign (Source : TPersistent);
    
begin
end;



end.