An update: it appears that the GTK and EFL ports have added at least basic support for end-of-task delivery, in http://trac.webkit.org/changeset/108628 and http://trac.webkit.org/changeset/110568. They now pass all MutationObserver tests. Do these tests pass in the actual browsers built from GTK and EFL, or only DRT?
On Fri, Jun 8, 2012 at 2:16 PM, Adam Klein <[email protected]> wrote: > Hi webkit-dev, > > DOM MutationObservers (see meta bug > https://bugs.webkit.org/show_bug.cgi?id=68729) have been shipping as > WebKitMutationObserver in Chromium since earlier this year. The > feature is fully specced as part of DOM4 > (http://www.w3.org/TR/domcore/#mutation-observers) and is implemented > in Firefox. Mozilla has also recently unprefixed their version of the > API (https://bugzilla.mozilla.org/show_bug.cgi?id=749920), and I'd > like to do the same (https://bugs.webkit.org/show_bug.cgi?id=85161). > > The tricky part is that while the Chromium version is complete and > compatible with Firefox, there's one piece missing from all other > ports (https://bugs.webkit.org/show_bug.cgi?id=78290). The short > version is that each port needs to be able to run some code > (delivering mutations) at the end of every task (see > http://www.whatwg.org/specs/web-apps/current-work/multipage/webappapis.html#processing-model-2, > step 4 "Perform a microtask checkpoint"). Without this code, mutations > due to user input are not delivered in a timely fashion. > > It's easy for Chromium to do this because we have our own MessageLoop > abstraction wrapping the native event loops on various platforms, so > our definition of end-of-task is easy to define. But implementing this > properly is likely to be slightly different for every port. > > In the short term, my plan is to add the unprefixed version (in > addition to the prefixed) of MutationObserver when PLATFORM(CHROMIUM) > is enabled. But I'd like to help other ports implement this > appropriately, and provide the unprefixed version there too. Please > let me know how I can be of assistance. > > Let me know if you have questions or concerns, > Adam Klein _______________________________________________ webkit-dev mailing list [email protected] http://lists.webkit.org/mailman/listinfo.cgi/webkit-dev
