wrappingInputRule

Build an input rule for automatically wrapping a textblock when a given string is typed. The regexp argument is directly passed through to the InputRule constructor. You'll probably want the regexp to start with ^, so that the pattern can only occur at the start of a textblock.

nodeType is the type of node to wrap in. If it needs attributes, you can either pass them directly, or pass a function that will compute them from the regular expression match.

By default, if there's a node with the same type above the newly wrapped node, the rule will try to join those two nodes. You can pass a join predicate, which takes a regular expression match and the node before the wrapped node, and can return a boolean to indicate whether a join should happen.