#include "stdafx.h"
#include "SigmaView.h"
#include "SectionDoc.h"
#include "ActionSortItem.h"
#include "ItemSelect.h"

// 获取需要强制保持在顶部的对象列表 (Mask + AboveMask)
void GetMaskAndTopObjects(CSigmaDoc* pDoc, CPositionList& listOut)
{
	if (!pDoc || !pDoc->m_pXy) return;

	CPositionList listMask;
	CPositionList listTop;

	auto pDraw = pDoc->GetDraw(); // 获取绘图容器
	CPtrList* values = pDraw->GetValueList();
	POSITION pos = values->GetHeadPosition();
	while (pos)
	{
		POSITION curr = pos;
		COne* pOne = (COne*)(values->GetNext(pos));
		if (pOne && pOne->m_pLayer)
		{
			auto role = pOne->m_pLayer->GetMaskRole();
			if (role == CLayer::ELayerMaskRole::Mask)
			{
				listMask.AddTail(curr);
			}
			else if (role == CLayer::ELayerMaskRole::AboveMask)
			{
				listTop.AddTail(curr);
			}
		}
	}

	if (!listMask.IsEmpty()) listOut.AddTail(&listMask);
	if (!listTop.IsEmpty()) listOut.AddTail(&listTop);
}

//order:0=最上显示 1=最下显示 2=上移一层 3=下移一层
extern "C" __declspec(dllexport)
int DisplayOrder_Set(CSigmaView * pView, int order)
{
	if (order < 0 || order > 3) return -1;
	if (pView == NULL || pView->m_pDoc == NULL) return -1;

	CPositionList seletionSet;
	pView->m_pDoc->GetSelectionSet(seletionSet);

	CString strLayer = pView->m_pDoc->GetSelectedElementLayer(seletionSet);
	if (strLayer == "Layer:\\遮罩图层")
		return -1;
	
	// 执行用户的操作 (让用户随便移)
	CActionSortItem* pUserAction = new CActionSortItem(pView->m_pDoc, ID_OBJECT_MOVETOFRONT, seletionSet, order);
	if (pUserAction)
	{
		pView->m_pDoc->SetActionItem(pUserAction);
	}

	// 进行“分区管制”修正
	CLayer* pMaskLayer = pView->m_pDoc->m_pXy->FindLayer("遮罩图层");
	if (pMaskLayer == nullptr)
	{
		return 1;
	}

	CPositionList listFix;
	GetMaskAndTopObjects(pView->m_pDoc, listFix);
	if (!listFix.IsEmpty())
	{
		CActionSortItem* pFixAction = new CActionSortItem(pView->m_pDoc, ID_OBJECT_MOVETOFRONT, listFix, 0);
		if (pFixAction)
		{
			pView->m_pDoc->SetActionItem(pFixAction);
		}
	}

	return 1;
}