//////////////////////////////////////////////////////////////////////////////
//类: CActionSortItem
//主要功能: 
//
//程序编写:		2006-12-07
/////////////////////////////////////////////////////////////////////////////

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

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

CActionSortItem::CActionSortItem(CSigmaDoc * ppDoc, UINT actionType, const CPositionList& list, int nModeSel)
: CActionItem(ppDoc, actionType)
, m_nModeSel(nModeSel)
{
	if(!list.IsEmpty())
	{
		POSITION pos,pt;
		pt=list.GetHeadPosition();
		while(pt)
		{
			pos=list.GetNext(pt);
			m_eleList.AddTail(pos);
		}

		long num=(long)list.GetCount();
		m_oldPos.resize(num);
		switch(nModeSel)
		{
		case 0://最上显示
			Movetofront(m_eleList);
			break;
		case 1://最下显示
			Movetoback(m_eleList);
			break;
		case 2://上移一层
			Moveforward(m_eleList);
			break;
		case 3://下移一层
			Moveback(m_eleList);
			break;
		}

		GetDoc()->Modified();
		GetDoc()->InvalidateSelection(m_eleList);
	}
}

CActionSortItem::~CActionSortItem(void)
{
}

void NAction::CActionSortItem::Movetofront(CPositionList& list)//最上显示
{
	int i=0;
	POSITION p,pos;
	p=list.GetHeadPosition();
	while(p)
	{
		pos=list.GetAt(p);
		m_oldPos[i]=GetDoc()->GetDraw()->GetElementIndex(pos);
		pos=GetDoc()->GetDraw()->MoveToFront(pos);
		if(pos) list.SetAt(p,pos);
		list.GetNext(p);
		i++;
	}
}

void NAction::CActionSortItem::Movetoback(CPositionList& list)//最下显示
{
	int i=(int)list.GetCount();
	POSITION p,pos;
	p=list.GetTailPosition();
	while(p)
	{
		i--;
		pos=list.GetAt(p);
		m_oldPos[i]=GetDoc()->GetDraw()->GetElementIndex(pos);
		pos=GetDoc()->GetDraw()->MoveToBack(pos);
		if(pos) list.SetAt(p,pos);
		list.GetPrev(p);
	}
}

void NAction::CActionSortItem::Moveforward(CPositionList& list)//上移一层
{
	int i=(int)list.GetCount();
	POSITION p,pos;
	p=list.GetTailPosition();
	while(p)
	{
		i--;
		pos=list.GetAt(p);
		m_oldPos[i]=GetDoc()->GetDraw()->GetElementIndex(pos);
		pos=GetDoc()->GetDraw()->MoveForward(pos);
		if(pos) list.SetAt(p,pos);
		list.GetPrev(p);
	}
}

void NAction::CActionSortItem::Moveback(CPositionList& list)//下移一层
{
	int i=0;
	POSITION p,pos;
	p=list.GetHeadPosition();
	while(p)
	{
		pos=list.GetAt(p);
		m_oldPos[i]=GetDoc()->GetDraw()->GetElementIndex(pos);
		pos=GetDoc()->GetDraw()->MoveBackward(pos);
		if(pos) list.SetAt(p,pos);
		list.GetNext(p);
		i++;
	}
}

void CActionSortItem::Undo(void)
{
	CActionItem::Undo();

	int i;
	COne *pOne;
	POSITION p,pos;
	switch(m_nModeSel)
	{
	case 0://最上显示
	case 3://下移一层
		i=(int)m_eleList.GetCount();
		p=m_eleList.GetTailPosition();
		while(p)
		{
			i--;
			pos=m_eleList.GetAt(p);
			pOne=GetDoc()->GetDraw()->RemoveAtNoClear(pos);
			pos=GetDoc()->GetDraw()->FindIndex(m_oldPos[i]);
			if(pos==NULL)	pos=GetDoc()->GetDraw()->AddTailOne(pOne);
			else			pos=GetDoc()->GetDraw()->InsertElementBefore(pos,pOne);
			m_eleList.SetAt(p, pos);
			m_eleList.GetPrev(p);
		}
		break;
	case 1://最下显示
	case 2://上移一层
		i=0;
		p=m_eleList.GetHeadPosition();
		while(p)
		{
			pos=m_eleList.GetAt(p);
			pOne=GetDoc()->GetDraw()->RemoveAtNoClear(pos);
			pos=GetDoc()->GetDraw()->FindIndex(m_oldPos[i]);
			if(pos==NULL)	pos=GetDoc()->GetDraw()->AddTailOne(pOne);
			else			pos=GetDoc()->GetDraw()->InsertElementBefore(pos,pOne);
			m_eleList.SetAt(p, pos);
			m_eleList.GetNext(p);
			i++;
		}
		break;
	}
	GetDoc()->InvalidateSelection(m_eleList);
	//GetDoc()->SetSelection(m_eleList);
}

void CActionSortItem::Redo(void)
{
	CActionItem::Redo();

	switch(m_nModeSel)
	{
	case 0://最上显示
		Movetofront(m_eleList);
		break;
	case 1://最下显示
		Movetoback(m_eleList);
		break;
	case 2://上移一层
		Moveforward(m_eleList);
		break;
	case 3://下移一层
		Moveback(m_eleList);
		break;
	}
	GetDoc()->InvalidateSelection(m_eleList);
}

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

void NAction::CActionSortItem::GetElementList(CPositionList& list)
{
	POSITION pos,pt;
	pt=m_eleList.GetHeadPosition();
	while(pt)
	{
		pos=m_eleList.GetNext(pt);
		list.AddTail(pos);
	}
}