January 2025 - webkit-dev - lists.webkit.org

InjectedBundle deprecation
by Alex Christensen 01 Aug '25

01 Aug '25

Hello WebKit developers! We are ramping up to do some serious work on Site Isolation which includes putting cross-origin iframes in a different process than the parent frame. Similar efforts have been done in other browser engines and some related work has already been done in WebKit, but not enough. This will do strange things to the InjectedBundle APIs, which have fundamental assumptions that the whole DOM is in one process and that communication only happens with one process at a time. We have never exposed InjectedBundle APIs as public API, but some other distributors of WebKit have. As we make progress on this project, we anticipate that anything in Source/WebKit/WebProcess/InjectedBundle/API is subject to deprecation and removal. This will also allow us to tighten the sandbox on the web process, resolve security and performance issues, and have cleaner code. Would the maintainers of the GTK and WPE APIs be willing to assist in migrating from those APIs and designing replacements in the UI process? Alex Christensen

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Site isolation
by Alex Christensen 01 Aug '25

01 Aug '25

The SiteIsolation feature is beginning to work in the simplest of cases, but I had to do some work in the Source/WebKit/Shared/RemoteLayerTree directory, which is platform-specific. Basically all the use of LayerHostingContextIdentifier in that directory needs an equivalent implementation for other graphics implementations, like in the CoordinatedGraphics directories. There is one layout test in LayoutTests/http/tests/site-isolation/basic-iframe.html that is currently skipped on all non-Cocoa platforms. Is someone willing to collaborate to design and implement the feature in non-Cocoa ports? We are in the early stages of the project and have a long way to go, so I imagine things will continue to come up, like deciding how to implement event handling and other platform dependent features. Alex

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WebKit Tree Closure 1-16, 5:45 PM-7:15 PM PST
by Jonathan Bedard 16 Jan '25

16 Jan '25

Hey folks, There is work being done on physical networking infrastructure which services the machines backing WebKit’s pre and post commit infrastructure on 1/16 which will result in network downtime. Historically, this sort of network outage has posed big problems for our infrastructure. We are therefore pro-actively closing the WebKit tree while the work is completed. The WebKit trees will be closed on Thursday, January 16th from 5:45 PM to 7:15 PM PST. Jonathan WebKit Continuous Integration

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Site isolation platform code
by Alex Christensen 14 Jan '25

14 Jan '25

Hey everyone! I’ve been doing a bunch of work on site isolation recently, and I’ve been doing my best to make all my changes platform-independent so it just works for everyone. However, there are two places I could use some collaboration with other WebKit developers: 1. createNewPage in WebKitUIClient.cpp needs some hooking up of the API::PageConfiguration in a way I couldn’t figure out in the few minutes I looked at it. This should be pretty straightforward to someone who knows the glib code better than I do. 2. We have a growing number of tests in LayoutTests/http/tests/site-isolation that exercise drawing code, which will take a significant amount of work to get implemented on non-Cocoa platforms. A lot of changes are happening in this area right now with the adoption of Skia, and it would be great if it were done in a way that could support site isolation. Thanks, Alex

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Naming scheme for fooIfExists/ensureFoo - Round 2
by Ryosuke Niwa 08 Jan '25

08 Jan '25

Hi all, We discussed this topic 11 years ago in https://lists.webkit.org/pipermail/webkit-dev/2013-June/025056.html but we seem to have never codified it in our coding style guideline. It really bothers me that we have a mixture of two styles so I’d like to propose that we pick one style and put that into style guideline & style checker. The question is as follows. A pair of functions which lazily construct an object and one which returns nullptr if the object had not already been constructed can be named: StyleResolver* styleResolver(); StyleResolver& ensureStyleResolver(); or: StyleResolver* styleResolverIfExists(); StyleResolver& styleResolver(); Which one should we use? - R. Niwa

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