964156 - Composition offset into TabParent may be incorrect

Status: NEW

(Core :: DOM: Events, defect)

Description

[Makoto Kato [:m_kato]]

Original implementation of e10s IME was for old Android fennec.  Android's implementation for IME always use NS_SELECTION_SET to mark composition string.

NS_SELECTION_SET notices NOTIFY_IME_OF_SELECTION_CHANGE, then, PuppetWidget will update a cache into tab parent.  So it was OK for android's widget.

But when dispatching composition event (or text event), gecko don't notice NOTIFY_IME_OF_SELECTION_CHANGE.

so we should use composition update event to notice composition start offset and etc.

Comment 1

[Makoto Kato [:m_kato]]

TabParent calculates start offset and tareget offset by complex way, so this isn't simple.  And selection change event will be called event if non-IME.

This IPC for IME offset should be used by IME only.