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[Bug 16391] regionLayoutUpdate needs to be async

From: <bugzilla@jessica.w3.org>
Date: Wed, 08 Aug 2012 23:50:30 +0000
Message-Id: <E1SzG1G-0003j2-7s@jessica.w3.org>
To: public-css-bugzilla@w3.org

--- Comment #5 from Alan Stearns <stearns@adobe.com> 2012-08-08 23:50:30 UTC ---
Another detail is whether to restrict the event trigger to more coarse layout
changes. At the moment the spec says that the event triggers when there is a
"possible layout change." Alex has expressed an interpretation of this as
"something has changed either in parameters of regions or in content that made
layout do non-zero work."

A more restrictive trigger could be something like "the regionOverset property
has changed somewhere in the region chain." This would result in fewer events
fired, but could miss some subtle changes that a script might want to respond

A use case for the less restrictive trigger is updating dictionary-style
headers or footers that list the first and last word displayed on a page. There
could be a layout change that affects this presentational data that does not
meet the more restrictive trigger.

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Received on Wednesday, 8 August 2012 23:50:31 UTC

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