Module capability 

How a widget takes part in document History: the capabilities an app root or a document owner provides, and the walks the runner uses to reach them.

Traits

DocumentHistory

A widget that owns a document’s History: its registration, restore readiness and presentation.

FrameworkHistoryTopology

Framework History lifecycle traversal for owners whose History surfaces differ from their visible presentation children.

Functions

document_action_applied

Tell widget a Document action it owns was applied.

document_history_definition

widget’s History presentation declaration.

history_registration

widget’s History registration (none unless it owns History).

history_restore_readiness

widget’s own restore veto for scope.

provides_document_history

Whether widget or a descendant presents its document’s History itself.

visit_framework_history

Visit every framework History surface under widget.

visit_framework_history_mut

Mutable visit_framework_history.