#include "StdAfx.h"
#include "globalFunc.h"
#include "SHAcDbBlockTable.h"

SHAcDbBlockTable::SHAcDbBlockTable(const TCHAR *blkName)
	: SHAcDbSymbolTable(_T("BLOCK"), blkName)
{
	if (SHAcDbSymbolTable::operator !()) 
	{
		return;
	}
	
	GetData(10, base);
	GetData(-2, ent);
}

SHAcDbBlockTable::~SHAcDbBlockTable()
{

}

int SHAcDbBlockTable::EntNext()
{
	ads_name e;
	ent>e;
	ent.FreeGroups();
	
	if (ads_entnext(e, ent) != RTNORM) 
	{
		ent.name[0] = ent.name[1] = 0L;
		return RTERROR;
	}

	return RTNORM;
}

int SHAcDbBlockTable::GetExtend(ads_point low, ads_point up, ads_matrix tranMat)
{
	if (!(*this))
	{
		return RTERROR;
	}

	ADSGePoint3d lowPt, upPt;
	int rc = ent.GetExtend(lowPt, upPt, tranMat);
	if (rc == RTERROR)
	{
		return RTERROR;
	}

	int findExtend = rc == RTNORM ? 1 : 0;
	
    EntitySet subEnt = ent;
    while(1)
	{
        ads_name entNext;
        if (ads_entnext(subEnt, entNext) != RTNORM)
		{
			break;
		}

        subEnt = entNext;
        subEnt.FreeGroups();
		
        CString eType;
        subEnt.GetData(0, eType.GetBuffer(256));
		eType.ReleaseBuffer();
        if (subEnt.Is(_T("ENDBLK"))) 
		{
			break;
		}

        ADSGePoint3d pt1, pt2;
        rc = subEnt.GetExtend(pt1, pt2, tranMat);
        if (rc == RTERROR)
		{
			return RTERROR;
		}
        else if (rc == RTNONE)   
		{
			continue;
		}

        if (!findExtend) 
		{
			lowPt = pt1;
			upPt = pt2;
			findExtend = 1;
        }
		else 
		{
			lowPt = GlobalFunc::Min(lowPt, pt1);
			upPt = GlobalFunc::Max(upPt, pt2);
        }
    }

    if (findExtend) 
	{
		lowPt > low;
		upPt > up;

		return RTNORM;
    }

    return RTNONE;
}