Source code of the user style sheet.
A #WebKitUserContentInjectedFrames value
A #WebKitUserStyleLevel
An allow_list of URI patterns or %NULL
A block_list of URI patterns or %NULL
A new #WebKitUserStyleSheet
ConstructionException GTK+ fails to create the object.
2.6
Creates a new user style sheet. Style sheets can be applied to some URIs only by passing non-null values for @allow_list or @block_list. Passing a %NULL allow_list implies that all URIs are on the allow_list. The style sheet is applied if an URI matches the allow_list and not the block_list. URI patterns must be of the form [protocol]://[host]/[path], where the *host* and *path* components can contain the wildcard character (*) to represent zero or more other characters.