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::FindSource(const char* fileName, int line, DviPosition& position)
{
CheckCondition();
BEGIN_CRITICAL_SECTION(dviMutex)
{
trace_search->WriteFormattedLine("libdvi", T_("searching src special %d %s"), line, fileName);
SourceSpecial* pSourceSpecial1Best = nullptr;
SourceSpecial* pSourceSpecial2Best = nullptr;
int pageIdx1 = -1;
int pageIdx2 = -1;
// get fully qualified path to the directory location of the
// document
PathName documentLocation(fqDviFileName);
documentLocation.RemoveFileSpec();
// file name relative to the location of the DVI document
const char* lpszRelFileName;
// absolute file name
PathName fqFileName;
if (Utils::IsAbsolutePath(fileName))
{
lpszRelFileName = Utils::GetRelativizedPath(fileName, documentLocation.GetData());
fqFileName = fileName;
fqFileName.MakeAbsolute();
}
else
{
lpszRelFileName = fileName;
fqFileName = documentLocation;
fqFileName /= fileName;
fqFileName.MakeAbsolute();
}
//
// scan the document
//
for (int pageIdx = 0; pageIdx < GetNumberOfPages(); ++pageIdx)
{
DviPageImpl* dviPage;
try
{
dviPage = reinterpret_cast<DviPageImpl*>(GetLoadedPage(pageIdx));
}
catch (const OperationCancelledException&)
{
return false;
}
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;
SourceSpecial* pSourceSpecial;
for (int j = -1; (pSourceSpecial = dviPage->GetNextSpecial<SourceSpecial>(j)) != nullptr; )
{
const char* name = pSourceSpecial->GetFileName();
// try exact match
bool nameMatch = (MyPathNameCompare(name, fileName) == 0);
// try fully qualified file names
if (!nameMatch)
{
PathName fqName;
if (Utils::IsAbsolutePath(name))
{
fqName = name;
fqName.MakeAbsolute();
}
else
{
fqName = documentLocation;
fqName /= name;
fqName.MakeAbsolute();
}
nameMatch = (MyPathNameCompare(fqName, fqFileName) == 0);
}
// try relative file names
if (!nameMatch && lpszRelFileName != nullptr)
{
const char* lpszRelName;
if (!Utils::IsAbsolutePath(name))
{
lpszRelName = name;
}
else
{
lpszRelName = Utils::GetRelativizedPath(name, documentLocation.GetData());
}
nameMatch = lpszRelName != nullptr && MyPathNameCompare(lpszRelName, lpszRelFileName) == 0;
}
if (!nameMatch)
{
continue;
}
if (line >= pSourceSpecial->GetLineNum())
{
if (pSourceSpecial1 == nullptr || (pSourceSpecial->GetLineNum() > pSourceSpecial1->GetLineNum()))
{
pSourceSpecial1 = pSourceSpecial;
}
}
if (line <= pSourceSpecial->GetLineNum())
{
if (pSourceSpecial2 == nullptr || (pSourceSpecial->GetLineNum() < pSourceSpecial2->GetLineNum()))
{
pSourceSpecial2 = pSourceSpecial;
}
}
}
if (pSourceSpecial1 != nullptr && pSourceSpecial2 != nullptr)
{
pSourceSpecial1Best = pSourceSpecial1;
pageIdx1 = pageIdx;
pSourceSpecial2Best = pSourceSpecial2;
pageIdx2 = pageIdx;
break;
}
else if (pSourceSpecial1 != nullptr
&& (pSourceSpecial1Best == nullptr || (abs(pSourceSpecial1Best->GetLineNum() - line) > abs(pSourceSpecial1->GetLineNum() - line))))
{
pSourceSpecial1Best = pSourceSpecial1;
pageIdx1 = pageIdx;
pSourceSpecial2Best = nullptr;
pageIdx2 = -1;
}
else if (pSourceSpecial2 != nullptr && (pSourceSpecial2Best == nullptr || (abs(pSourceSpecial2Best->GetLineNum() - line) > abs(pSourceSpecial2->GetLineNum() - line))))
{
pSourceSpecial2Best = pSourceSpecial2;
pageIdx2 = pageIdx;
pSourceSpecial1Best = nullptr;
pageIdx1 = -1;
}
}
//
// evaluate the results
//
if (pSourceSpecial1Best == nullptr && pSourceSpecial2Best == nullptr)
{
trace_search->WriteLine("libdvi", T_("search failed"));
return false;
}
if (pSourceSpecial1Best == nullptr)
{
trace_search->WriteFormattedLine("libdvi", T_("found src2 on page #%d"), pageIdx2);
trace_search->WriteFormattedLine("libdvi", " src2 = [%d (%d,%d)]", pSourceSpecial2Best->GetLineNum(), pSourceSpecial2Best->GetX(), pSourceSpecial2Best->GetY());
position.pageIdx = pageIdx2;
position.x = pSourceSpecial2Best->GetX();
position.y = pSourceSpecial2Best->GetY();
}
else if (pSourceSpecial2Best == nullptr)
{
trace_search->WriteFormattedLine("libdvi", T_("found src1 on page #%d"), pageIdx1);
trace_search->WriteFormattedLine("libdvi", " src1 = [%d (%d,%d)]", pSourceSpecial1Best->GetLineNum(), pSourceSpecial1Best->GetX(), pSourceSpecial1Best->GetY());
position.pageIdx = pageIdx1;
position.x = pSourceSpecial1Best->GetX();
position.y = pSourceSpecial1Best->GetY();
}
else
{
position.pageIdx = pageIdx1;
trace_search->WriteFormattedLine("libdvi", T_("found src region on page #%d"), position.pageIdx);
trace_search->WriteFormattedLine("libdvi", " src1 = [%d (%d,%d)]", pSourceSpecial1Best->GetLineNum(), pSourceSpecial1Best->GetX(), pSourceSpecial1Best->GetY());
trace_search->WriteFormattedLine("libdvi", " src2 = [%d (%d,%d)]", pSourceSpecial2Best->GetLineNum(), pSourceSpecial2Best->GetX(), pSourceSpecial2Best->GetY());
position.x = pSourceSpecial1Best->GetX();
if (pSourceSpecial2Best->GetLineNum() == pSourceSpecial1Best->GetLineNum())
{
position.y = pSourceSpecial1Best->GetY();
}
else
{
position.y = (pSourceSpecial1Best->GetY()
+ ((line - pSourceSpecial1Best->GetLineNum())
* (pSourceSpecial2Best->GetY()
- pSourceSpecial1Best->GetY())
/ (pSourceSpecial2Best->GetLineNum()
- pSourceSpecial1Best->GetLineNum())));
}
trace_search->WriteFormattedLine("libdvi", " interpolated (x,y) = (%d,%d)", position.x, position.y);
}
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();
}