#include "stdafx.h"
#include "SigmaView.h"
#include "SectionDoc.h"
#include "ItemBreakCurve.h"
#include "ItemExtendCurve.h"

static CItemBreakCurve * GetItemBreakCurveFromView(CSigmaView * pView)
{
	if (pView == NULL)
		return 0;

	CItem * pItem = pView->GetItem();
	if (pItem == NULL)
		return 0;

	CItemBreakCurve * itemBreakCurve = dynamic_cast<CItemBreakCurve *>(pItem);
	if (itemBreakCurve == NULL)
		return 0;

	return itemBreakCurve;
}

static CItemBreakCurveDirect * GetItemBreakCurveDirectFromView(CSigmaView * pView)
{
	if (pView == NULL)
		return 0;

	CItem * pItem = pView->GetItem();
	if (pItem == NULL)
		return 0;

	CItemBreakCurveDirect * itemBreakCurveDirectly = dynamic_cast<CItemBreakCurveDirect *>(pItem);
	if (itemBreakCurveDirectly == NULL)
		return 0;

	return itemBreakCurveDirectly;
}

extern "C" __declspec(dllexport)
int BreakCurve_IsBreaked(CSigmaView * pView)
{
	CItemBreakCurve * pItem = GetItemBreakCurveFromView(pView);
	if (pItem == NULL)
		return -1;

	return pItem->IsBreaked()?1:-1;
}

extern "C" __declspec(dllexport)
int BreakCurve_GetSelectCount(CSigmaView * pView)
{
	CItemBreakCurve * pItem = GetItemBreakCurveFromView(pView);
	if (pItem == NULL)
		return -1;

	return pItem->GetSelectCount();
}

extern "C" __declspec(dllexport)
void BreakCurveDirect_EreasRubberLine(CSigmaView * pView, HDC hdc)
{
	CItemBreakCurveDirect * pBreackCurveDirectly = GetItemBreakCurveDirectFromView(pView);
	if (pBreackCurveDirectly == NULL)
		return ;

	//pBreackCurveDirectly->EreaseRubberLine();
}

/**
 * 判断延伸是否成功
 * 按说这个接口不应该放在这个文件里面的，但是由于它目前只有一个接口，暂时放在这里，有更多接口了，再移到单独的 interface 文件中
 * 
 * \param pView
 * \return 
 */
extern "C" __declspec(dllexport)
bool BreakCurve_ExtendCurveFinished(CSigmaView * pView)
{
	CItemBreakCurve * pItem = GetItemBreakCurveFromView(pView);
	if (pItem == nullptr)
	{
		return false;
	}

	auto * itemBreakCurve = dynamic_cast<CItemExtendCurve*>(pItem);
	return itemBreakCurve->m_bExtendCurveFinished;
}