apply
Description:
This function modifies the TextTag properties that are related to the SourceStyle properties.
Other TextTag properties are left untouched.
If this is non-%NULL, applies this to tag.
If this is null, the related *-set properties of
TextTag are set to false.
Parameters:
| this |
a SourceStyle to apply, or |
| tag |
a TextTag to apply styles to. |