// $Revision: 1.3 $
// Copyright (C) 1995 Taligent, Inc. All rights reserved.
#ifndef TaligentSamples_FOLLOWURLCOMMAND
#include "FollowURLCommand.h"
#endif
#ifndef TaligentSamples_WEBMODEL
#include "WebModel.h"
#endif

MCollectibleDefinitionsMacro(TFollowURLCommand, kOriginalVersion);

TFollowURLCommand::TFollowURLCommand()
   : TCommandOn<TModelSelection>(TCommonCommand::kSerialUndo),
   fDestination(),
   fPreviousURL()
{
}

TFollowURLCommand::TFollowURLCommand(const TURL& destination)
   : TCommandOn<TModelSelection>(TCommonCommand::kSerialUndo),
   fDestination(destination),
   fPreviousURL()
{
}

TFollowURLCommand::TFollowURLCommand(const TFollowURLCommand& source)
   : TCommandOn<TModelSelection>(source),
   fDestination(source.fDestination),
   fPreviousURL(source.fPreviousURL)
{
}

TFollowURLCommand::~TFollowURLCommand()
{
}

TFollowURLCommand&
TFollowURLCommand::operator=(const TFollowURLCommand& source)
{
	if (&source != this) {
		TCommandOn<TModelSelection>::operator=(source);
		fDestination = source.fDestination;
		fPreviousURL = source.fPreviousURL;
	}
	return *this;
}

TStream&
TFollowURLCommand::operator>>=(TStream& toStream) const
{
	::WriteVersion(toStream);
	TCommandOn<TModelSelection>::operator>>=(toStream);
	fDestination >>= toStream;
	fPreviousURL >>= toStream;
	return toStream;
}

TStream&
TFollowURLCommand::operator<<=(TStream& fromStream)
{
	::ReadVersion(fromStream, kOriginalVersion, kOriginalVersion);
	TCommandOn<TModelSelection>::operator<<=(fromStream);
	fDestination <<= fromStream;
	fPreviousURL <<= fromStream;
	return fromStream;
}

void
TFollowURLCommand::HandleDoBegin(TModelSelection& selection)
{
	TModelPointerTo<TWebModel> model(selection.GetModelReference());
	fPreviousURL = model->FollowURL(fDestination);
}

void
TFollowURLCommand::HandleUndo(TModelSelection& selection)
{
	TModelPointerTo<TWebModel> model(selection.GetModelReference());
	model->FollowURL(fPreviousURL);
}

void
TFollowURLCommand::HandleRedo(TModelSelection& selection)
{
	TModelPointerTo<TWebModel> model(selection.GetModelReference());
	model->FollowURL(fDestination);
}