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Add NewGRFClass helper method for whether any UI classes available

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This commit is contained in:
Jonathan G Rennison
2023-01-03 03:31:09 +00:00
parent 5e76e6fb07
commit 417416d19b
4 changed files with 16 additions and 2 deletions
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13
src/newgrf_class_func.h
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@@ -131,6 +131,18 @@ DEFINE_NEWGRF_CLASS_METHOD(uint)::GetUIClassCount()
return cnt;
}
/**
* Get whether at least one class is available to the user.
* @return Whether at least one class is available to the user.
*/
DEFINE_NEWGRF_CLASS_METHOD(bool)::HasUIClass()
{
for (uint i = 0; i < Tmax && classes[i].global_id != 0; i++) {
if (classes[i].GetUISpecCount() > 0) return true;
}
return false;
}
/**
* Get the nth-class with user available specs.
* @param index UI index of a class.
@@ -223,6 +235,7 @@ DEFINE_NEWGRF_CLASS_METHOD(const Tspec *)::GetByGrf(uint32 grfid, byte local_id,
template NewGRFClass<Tspec, Tid, Tmax> *name::Get(Tid cls_id); \
template uint name::GetClassCount(); \
template uint name::GetUIClassCount(); \
template bool name::HasUIClass(); \
template Tid name::GetUIClass(uint index); \
template const Tspec *name::GetSpec(uint index) const; \
template int name::GetUIFromIndex(int index) const; \