nvda

Gecko VBufBackend: greatly speed up subtree re-renders when part of a document has changed

#8678

Merged

MSHTML vbufBackend: don't do partial re-renders as strange things happen when moving nodes with javascript.

VBufStorage and VBufBackend: remove unneeded code changes and clarify comments.

VBufStorage: allow nodes to control when they can be reused in a re-render with requiresUparentUpdate and allowReuseInAncestorUpdate properties.

VBufStorage and backends: If a part of a table needs re-rendering, make sure to rerender any part of the table after that. E.g. If a row is added, then all rows after that also need to be re-rendered.

VBufStorage and backends: ensure that a node and its descendants are all re-rendered if a node has been given alternative text because the node had no useful descendants (E.g. an empty link).

VBufStorage and backends: remove some log calls, beeps, and also switch gecko_ia2 virtualBuffer from AccessibleObjectFromEvent to accChild for getNVDAObjectFromIdentifier.

Gecko virtualBuffer: ensure that getNVDAObjectFromIdentifier still works with Google Chrome.

Merge branch 'master' into vbufPartialRender

VBufStorage and backends: Ensure that reuse is denied when previous siblings have changed, only if a node's denyReuseIfPreviousSiblingsChanged property is actually set (woops). Also, remove ensureDescendantsRequireParentUpdate method and replace it with a alwaysRerenderDescendants property instead.

Mozilla NVDAObject's setFocus method: ensure this blocks until a focus event is received by NVDA.

Address review comments:

Mozilla NVDAObject's _getPhysicalFocus method: handle case where accParent is None. Probably happens when an IAccessible is removed from the tree after we have fetched it... Happens quite a bit on facebook.com/

Merge branch 'master' into vbufPartialRender

Fix comments.

Merge branch 'master' into vbufPartialRender

Update what's new