void CFI::Component::Parse(const string &str)
{
if ( str.empty() )
throw std::invalid_argument("Empty string supplied to CFI::Component");
std::string utf8 = str.stl_str();
std::istringstream iss(utf8);
// read an integer
iss >> nodeIndex;
if ( nodeIndex == 0 && iss.fail() )
throw std::invalid_argument(_Str("No node value at start of CFI::Component string '", str, "'"));
while ( !iss.eof() )
{
char next = 0;
iss >> next;
switch ( next )
{
case '[':
{
size_t pos = static_cast<size_t>(iss.tellg());
iss.ignore(std::numeric_limits<std::streamsize>::max(), ']');
size_t end = ((size_t)iss.tellg()) - 1;
if ( iss.eof() )
throw std::invalid_argument(_Str("Invalid string supplied to CFI::Component: ", str));
if ( characterOffset != 0 )
{
// this is a text qualifier
textQualifier = utf8.substr(pos, end-pos);
flags |= TextQualifier;
}
else
{
// it's a position qualifier
qualifier = utf8.substr(pos, end-pos);
flags |= Qualifier;
}
break;
}
case '~':
{
// character offsets and spatial/temporal offsets are mutually exclusive
if ( HasCharacterOffset() )
break;
// read a numeral
iss >> temporalOffset;
flags |= TemporalOffset;
break;
}
case '@':
{
// character offsets and spatial/temporal offsets are mutually exclusive
if ( HasCharacterOffset() )
break;
// two floats, separated by a colon
float x, y;
// read x
iss >> x;
// check for and skip delimiter
if ( iss.peek() != ':' )
break;
iss.ignore(1);
// read y
iss >> y;
spatialOffset.x = x;
spatialOffset.y = y;
flags |= SpatialOffset;
break;
}
case ':':
{
// character offsets and spatial/temporal offsets are mutually exclusive
if ( HasSpatialTemporalOffset() )
break;
iss >> characterOffset;
flags |= CharacterOffset;
break;
}
case '!':
{
// must be the last character, and no offsets
if ( ((int)iss.peek()) != -1 || HasSpatialTemporalOffset() || HasCharacterOffset() )
break;
flags |= Indirector;
break;
}
default:
break;
}
}
}
void CFI::Component::Parse(const string &str)
{
if ( str.empty() )
{
HandleError(EPUBError::CFIParseFailed, "Empty string supplied to CFI::Component");
return;
}
std::string utf8 = str.stl_str();
std::istringstream iss(utf8);
// read an integer
iss >> nodeIndex;
if ( nodeIndex == 0 && iss.fail() )
{
HandleError(EPUBError::CFIParseFailed, _Str("No node value at start of CFI::Component string '", str, "'"));
return;
}
while ( !iss.eof() )
{
char next = 0;
iss >> next;
switch ( next )
{
case '[':
{
size_t pos = static_cast<size_t>(iss.tellg());
iss.ignore(std::numeric_limits<std::streamsize>::max(), ']');
size_t end = ((size_t)iss.tellg()) - 1;
if ( iss.eof() )
{
HandleError(EPUBError::CFIParseFailed);
return;
}
if ( characterOffset != 0 )
{
// this is a text qualifier
flags |= TextQualifier;
std::string sub = utf8.substr(pos, end-pos);
// is there a side-bias?
auto biasPos = sub.find(";s=");
if ( biasPos == std::string::npos )
{
textQualifier = std::move(sub);
}
else
{
textQualifier = sub.substr(0, biasPos);
if ( sub.size() > biasPos + 3 )
{
switch ( sub[biasPos+3] )
{
case 'b':
sideBias = SideBias::Before;
break;
case 'a':
sideBias = SideBias::After;
break;
default:
sideBias = SideBias::Unspecified;
break;
}
}
}
}
else
{
// it's a position qualifier
qualifier = utf8.substr(pos, end-pos);
flags |= Qualifier;
}
break;
}
case '~':
{
// character offsets and spatial/temporal offsets are mutually exclusive
if ( HasCharacterOffset() )
break;
// read a numeral
iss >> temporalOffset;
flags |= TemporalOffset;
break;
}
case '@':
{
// character offsets and spatial/temporal offsets are mutually exclusive
if ( HasCharacterOffset() )
break;
// two floats, separated by a colon
float x, y;
// read x
iss >> x;
// check for and skip delimiter
if ( iss.peek() != ':' )
break;
iss.ignore(1);
// read y
iss >> y;
spatialOffset.x = x;
spatialOffset.y = y;
flags |= SpatialOffset;
break;
}
case ':':
{
// character offsets and spatial/temporal offsets are mutually exclusive
if ( HasSpatialTemporalOffset() )
break;
iss >> characterOffset;
flags |= CharacterOffset;
break;
}
case '!':
{
// must be the last character, and no offsets
if ( ((int)iss.peek()) != -1 || HasSpatialTemporalOffset() || HasCharacterOffset() )
break;
flags |= Indirector;
break;
}
default:
break;
}
}
}
