// Builds up a list of unicode ranges from a comma-separated list of unicode ranges in string form.
bool UnicodeRange::BuildList(UnicodeRangeList& list, const String& unicode_range)
{
StringList unicode_ranges;
StringUtilities::ExpandString(unicode_ranges, unicode_range);
for (size_t i = 0; i < unicode_ranges.size(); ++i)
{
UnicodeRange range;
if (!range.Initialise(unicode_ranges[i]))
return false;
list.push_back(range);
}
// Collapse contiguous ranges.
for (size_t i = 0; i < list.size(); ++i)
{
size_t j = i + 1;
while (j < list.size())
{
if (list[i].IsContiguous(list[j]))
{
list[i] = list[i].Join(list[j]);
list.erase(list.begin() + j);
}
else
++j;
}
}
return !list.empty();
}
// Returns true if this range is wholly contained within another range list.
bool UnicodeRange::IsContained(const UnicodeRangeList& rhs)
{
for (size_t i = 0; i < rhs.size(); ++i)
{
if (IsContained(rhs[i]))
return true;
}
return false;
}
// Returns a handle for positioning and rendering this face at the given size.
Rocket::Core::FontFaceHandle* FontFace::GetHandle(const String& _raw_charset, int size)
{
UnicodeRangeList charset;
HandleMap::iterator iterator = handles.find(size);
if (iterator != handles.end())
{
const HandleList& handles = (*iterator).second;
// Check all the handles if their charsets match the requested one exactly (ie, were specified by the same
// string).
String raw_charset(_raw_charset);
for (size_t i = 0; i < handles.size(); ++i)
{
if (handles[i]->GetRawCharset() == _raw_charset)
{
handles[i]->AddReference();
return (Rocket::Core::FreeType::FontFaceHandle*)handles[i];
}
}
// Check all the handles if their charsets contain the requested charset.
if (!UnicodeRange::BuildList(charset, raw_charset))
{
Log::Message(Log::LT_ERROR, "Invalid font charset '%s'.", _raw_charset.CString());
return NULL;
}
for (size_t i = 0; i < handles.size(); ++i)
{
bool range_contained = true;
const UnicodeRangeList& handle_charset = handles[i]->GetCharset();
for (size_t j = 0; j < charset.size() && range_contained; ++j)
{
if (!charset[j].IsContained(handle_charset))
range_contained = false;
}
if (range_contained)
{
handles[i]->AddReference();
return (Rocket::Core::FreeType::FontFaceHandle*)handles[i];
}
}
}
// See if this face has been released.
if (face == NULL)
{
Log::Message(Log::LT_WARNING, "Font face has been released, unable to generate new handle.");
return NULL;
}
// Construct and initialise the new handle.
FontFaceHandle* handle = new FontFaceHandle();
if (!handle->Initialise(face, _raw_charset, size))
{
handle->RemoveReference();
return NULL;
}
// Save the handle, and add a reference for the callee. The initial reference will be removed when the font face
// releases it.
if (iterator != handles.end())
(*iterator).second.push_back(handle);
else
handles[size] = HandleList(1, handle);
handle->AddReference();
return handle;
}