Add .insertMeta() and .removeMeta() methods to insert and remove
metadata through the meta list. For convenience, there is also a
.remove() method in MetaItem that wraps around removeMeta().
Also rename insertItem() and removeItem() to addInsertedItem() and
deleteRemovedItem() to avoid confusion, and make the MetaList
constructor take a dm.Surface rather than a document so we can call
change().
Change-Id: I4b62a3109404cfd56f5de68938e1db908b03e678
Previously these were static functions in TransactionProcessor
which instantiated a TP called .process() on it. These are now
methods of ve.dm.Document.
Also moved the emission of the 'transact' event on the document from
TransactionProcessor to Document itself, and moved the tests asserting
double application is protected against from TP to Document (because
the corresponding code moved as well).
Change-Id: I7c9f22a14accaf0ba1f70d5aa4f0573bb7e677d0
A MetaList is a collection of MetaItems representing all of the
metadata in a ve.dm.Document, and it updates itself live as the
underlying document changes.
Currently this interface is read-only, I'll add mutators next.
Change-Id: If7bfc9563af37e22dcdca9a682d6decc2f6f1872
