pango:attr-list-change (attrlist attribute)

attrlist -- a pango:attr-list instance
attribute -- a pango:attribute instance

Insert the given attribute into the pango:attr-list instance. It will replace any attributes of the same type on that segment and be merged with any adjoining attributes that are identical.

This function is slower than the pango:attr-list-insert function for creating a attribute list in order, potentially much slower for large lists. However, the pango:attr-list-insert function is not suitable for continually changing a set of attributes since it never removes or combines existing attributes.