#include "StdAfx.h"
#include ".\actionadditem.h"
#include "SigmaDoc.h"
#include "SigmaView.h"
#include "Visitor.h"


NAction::CActionAddItem::CActionAddItem()
	: CActionItem(nullptr, 0)
{
}

CActionAddItem::CActionAddItem(CSigmaDoc * ppDoc, UINT actionType, const CPositionList& list)
: CActionItem(ppDoc, actionType)
, m_bAdded(false)
{
	Remember(list);
	CreatePos();
}

CActionAddItem::CActionAddItem(CSigmaDoc * ppDoc, UINT actionType, COne* pOne)
: CActionItem(ppDoc, actionType)
, m_bAdded(false)
, m_pos(NULL)
{
	value.AddTail(pOne);
	CreatePos();
}

CActionAddItem::~CActionAddItem(void)
{
	if (!m_bAdded)
		Clear(value);   //this COne associated with addAction is deleted when the action is deleted.
						//only if the object is not added in the document;
}

void CActionAddItem::Finish(void)
{
	PerformOperation();
	CActionItem::Finish();
}

void NAction::CActionAddItem::accept(CActionVisitor& visitor)
{
	visitor.visit(*this);
}

// Actually perform the operation, or tell the view to do it. Subclasses
// should override to provide custom edit-like operations such as insert
// date/time.
 
void CActionAddItem::PerformOperation()
{
	m_bAdded = true;
}

//Selection of object is not restored in the Undo. Because i don't think it is a state of CDocument,
//though it is a state of CView. The real reason behind this is, it is not important
//for users to retrieve what have been seleted after doing something.
void CActionAddItem::Undo()
{
	CActionItem::Undo();
	//delete the new added obj;
	RemoveOperation();
	m_bAdded = false;
}

void CActionAddItem::Redo()
{
	CActionItem::Redo();
	AddOperation();
	// this is a one-shot action
	m_bAdded = true;
}

void CActionAddItem::AddOperation(void)
{
	//add back all the objects according its position in the CDrawDoc::m_objects.
	int i=0;
	COne *pOne;
	POSITION p,pos=NULL;
	//CPositionList list;
	p=value.GetHeadPosition();
	while(p)
	{
		pOne=(COne *)(value.GetNext(p));
		if(!m_pos.empty()) pos=GetDoc()->GetDraw()->FindIndex(m_pos[i]);
		if(pos==NULL)
			pos=GetDoc()->GetDraw()->AddTailOne(pOne);
		else
			pos=GetDoc()->GetDraw()->InsertElementBefore(pos,pOne);

		//list.AddTail(pos);
		i++;
	}
	//GetDoc()->InvalidateSelection(list);
	//GetDoc()->SetSelection(list);
}

void CActionAddItem::RemoveOperation(void)
{
	GetDoc()->ClearSelection();
	COne* pOne;
	int n=0;
	CRect8 range(1e100,-1e100,-1e100,1e100);
	//delete all the regulation fist;
	POSITION pos = value.GetTailPosition();
	while (pos != NULL)
	{
		pOne = (COne*)value.GetPrev(pos);
		pOne->GetRange(range);
		this->RemoveAt(pOne);
	}
	Invalidate(range);
}

int NAction::CActionAddItem::CreatePos(void)
{
	if(value.IsEmpty()) return 0;
	m_pos.resize(value.GetCount());

	long i=0;
	COne* pOne;
	POSITION pos, pt;
	pos=value.GetHeadPosition();
	while(pos)
	{
		pOne=(COne*)value.GetNext(pos);
		pt=GetDoc()->GetDraw()->Find(pOne);
		m_pos[i++]=GetDoc()->GetDraw()->GetElementIndex(pt);
	}
	return (int)value.GetCount();
}