bool DviImpl::GetSource(const DviPosition& pos, PathName& fileName, int* pLineNum)
{
CheckCondition();
BEGIN_CRITICAL_SECTION(dviMutex)
{
if (pos.pageIdx >= GetNumberOfPages())
{
return false;
}
DviPageImpl* dviPage = reinterpret_cast<DviPageImpl*>(GetLoadedPage(pos.pageIdx));
if (dviPage == nullptr)
{
throw DviPageNotFoundException("", T_("The DVI page could not be found."), MiKTeXException::KVMAP(), MIKTEX_SOURCE_LOCATION());
}
AutoUnlockPage autoUnlockPage(dviPage);
SourceSpecial* pSourceSpecial1 = nullptr;
SourceSpecial* pSourceSpecial2 = nullptr;
int cursorOffset = OFFSET(pos.x, pos.y);
int src1Offset = 0;
int src2Offset = 0;
SourceSpecial* pSourceSpecial;
// find two adjacent src specials
for (int j = -1; (pSourceSpecial = dviPage->GetNextSpecial<SourceSpecial>(j)) != nullptr; )
{
int srcOffset = OFFSET(pSourceSpecial->GetX(), pSourceSpecial->GetY());
if (cursorOffset > srcOffset)
{
if (pSourceSpecial1 == nullptr || srcOffset > src1Offset)
{
pSourceSpecial1 = pSourceSpecial;
src1Offset = srcOffset;
}
}
else if (cursorOffset < srcOffset)
{
if (pSourceSpecial2 == nullptr || srcOffset < src2Offset)
{
pSourceSpecial2 = pSourceSpecial;
src2Offset = srcOffset;
}
}
}
if (pSourceSpecial1 == nullptr && pSourceSpecial2 == nullptr)
{
return false;
}
int lineDelta = 0;
if (pSourceSpecial1 == nullptr)
{
pSourceSpecial = pSourceSpecial2;
}
else if (pSourceSpecial2 == nullptr)
{
pSourceSpecial = pSourceSpecial1;
}
else if (MyPathNameCompare(pSourceSpecial1->GetFileName(), pSourceSpecial2->GetFileName()) != 0)
{
if (cursorOffset - src1Offset < src2Offset - cursorOffset)
{
pSourceSpecial = pSourceSpecial1;
}
else
{
pSourceSpecial = pSourceSpecial2;
}
}
else
{
int d = src2Offset - src1Offset;
if (d != 0)
{
int d1 = cursorOffset - src1Offset;
int linesbetween
= (pSourceSpecial2->GetLineNum()
- pSourceSpecial1->GetLineNum()
+ 1);
lineDelta = (d1 * linesbetween) / d;
}
pSourceSpecial = pSourceSpecial1;
}
fileName = pSourceSpecial->GetFileName();
if (pLineNum != nullptr)
{
*pLineNum = pSourceSpecial->GetLineNum() + lineDelta;
}
return true;
}
END_CRITICAL_SECTION();
}
bool
DviImpl::GetSource (/*[in]*/ const DviPosition & pos,
/*[out]*/ PathName & fileName,
/*[out]*/ int * pLineNum)
{
CheckCondition ();
MIKTEX_BEGIN_CRITICAL_SECTION (&criticalSectionMonitor)
{
if (pos.pageIdx >= GetNumberOfPages())
{
return (false);
}
DviPageImpl * pPage =
reinterpret_cast<DviPageImpl*>(GetLoadedPage(pos.pageIdx));
if (pPage == 0)
{
throw DviPageNotFoundException
(0,
T_("The DVI page could not be found."),
0,
__FILE__,
__LINE__);
}
AutoUnlockPage autoUnlockPage (pPage);
SourceSpecial * pSourceSpecial1 = 0;
SourceSpecial * pSourceSpecial2 = 0;
int cursorOffset = OFFSET(pos.x, pos.y);
int src1Offset = 0;
int src2Offset = 0;
SourceSpecial * pSourceSpecial;
// find two adjacent src specials
for (int j = -1;
(pSourceSpecial = pPage->GetNextSpecial<SourceSpecial>(j)) != 0;
)
{
int srcOffset =
OFFSET(pSourceSpecial->GetX(), pSourceSpecial->GetY());
if (cursorOffset > srcOffset)
{
if (pSourceSpecial1 == 0 || srcOffset > src1Offset)
{
pSourceSpecial1 = pSourceSpecial;
src1Offset = srcOffset;
}
}
else if (cursorOffset < srcOffset)
{
if (pSourceSpecial2 == 0 || srcOffset < src2Offset)
{
pSourceSpecial2 = pSourceSpecial;
src2Offset = srcOffset;
}
}
}
if (pSourceSpecial1 == 0 && pSourceSpecial2 == 0)
{
return (false);
}
int lineDelta = 0;
if (pSourceSpecial1 == 0)
{
pSourceSpecial = pSourceSpecial2;
}
else if (pSourceSpecial2 == 0)
{
pSourceSpecial = pSourceSpecial1;
}
else if (MyPathNameCompare(pSourceSpecial1->GetFileName(),
pSourceSpecial2->GetFileName())
!= 0)
{
if (cursorOffset - src1Offset < src2Offset - cursorOffset)
{
pSourceSpecial = pSourceSpecial1;
}
else
{
pSourceSpecial = pSourceSpecial2;
}
}
else
{
int d = src2Offset - src1Offset;
if (d != 0)
{
int d1 = cursorOffset - src1Offset;
int linesbetween
= (pSourceSpecial2->GetLineNum()
- pSourceSpecial1->GetLineNum()
+ 1);
lineDelta = (d1 * linesbetween) / d;
}
pSourceSpecial = pSourceSpecial1;
}
fileName = pSourceSpecial->GetFileName();
if (pLineNum != 0)
{
*pLineNum = pSourceSpecial->GetLineNum() + lineDelta;
}
return (true);
}
MIKTEX_END_CRITICAL_SECTION();
}