6.4.3 Transaction hooks

The transaction hooks inform about changes in transaction histories. The transaction histories are local (and independent) for pages, so transaction hooks are local for pages, too.

• New – a new item in the undo history was created
• Delete – an item of the undo history was deleted
• Update – un item item of the undo history changed its name
• Undo – one item was undone
• Redo – one item was redone
• Saved – the “saved” flag of a page (or a document) was set