Earlier in this patch series we added AnimationPlayer::StartOnNextTick which
takes a ready time parameter expressed in timeline time. In order to call this
method when painting finishes we need to convert the TimeStamp recorded when
painting finished to a timeline time. However, when the timeline is driven by
a refresh driver under test control we can no longer meaningfully do this
conversion since there is no correspondence between the notion of time used to
record the time when painting finished (wallclock time) and the notion of time
used by the timeline (which has been arbitrarily adjusted by test code).
We need a way to detect this situation so that we know not to call
ToTimelineTime in that case.
Alternatively, we could make ToTimelineTime automatically return a null value
when its refresh driver is under test control. However, in this situation
ToTimelineTime can still actually be used to convert a TimeStamp to a timeline
time as long as the TimeStamp is from the same refresh driver. Indeed,
GetCurrentTime does exactly that. So if we were to go down that route we would
have to provide a way for GetCurrentTime to work around that restriction.
For now, this patch puts the onus on the caller of ToTimelineTime to check if
the timeline is under test control first (unless they are passing a TimeStamp
from the same refresh driver, in which case there is no need to check).
An explanation of the Mozilla Source Code Directory Structure and links to
project pages with documentation can be found at:
https://developer.mozilla.org/en/Mozilla_Source_Code_Directory_Structure
For information on how to build Mozilla from the source code, see:
http://developer.mozilla.org/en/docs/Build_Documentation
To have your bug fix / feature added to Mozilla, you should create a patch and
submit it to Bugzilla (https://bugzilla.mozilla.org). Instructions are at:
http://developer.mozilla.org/en/docs/Creating_a_patch
http://developer.mozilla.org/en/docs/Getting_your_patch_in_the_tree
If you have a question about developing Mozilla, and can't find the solution
on http://developer.mozilla.org, you can try asking your question in a
mozilla.* Usenet group, or on IRC at irc.mozilla.org. [The Mozilla news groups
are accessible on Google Groups, or news.mozilla.org with a NNTP reader.]
You can download nightly development builds from the Mozilla FTP server.
Keep in mind that nightly builds, which are used by Mozilla developers for
testing, may be buggy. Firefox nightlies, for example, can be found at:
ftp://ftp.mozilla.org/pub/firefox/nightly/latest-trunk/
- or -
http://nightly.mozilla.org/