WebKit Igalia Periodical #9

Landed a fix to the experimental Trusted Types implementation for certain event handler content attributes not being protected even though they are sinks.

Landed a fix to experimental Trusted Types implementation where the SVGScriptElement.className property was being protected even though it's not a sink.

Support for the H.264 “constrained-high” and “high” profiles was improved in the GStreamer WebRTC backend.

The GStreamer WebRTC backend now has basic support for network conditions simulation, that will be useful to improve error recovery and packet loss coping mechanisms.

JSC got a fix for a tricky garbage-collection issue.

Landed a change that enables testing the "damage propagation" functionality. This is a first step in a series of fixes and improvements that should stabilize that feature.

Damage propagation passes extra information that describes the viewport areas that have visually changed since the last frame across different graphics subsystems. This allows the WebKit compositor and the system compositor to reduce the amount of painting being done thus reducing usage of resources (CPU, GPU, and memory bus). This is especially helpful on constrained, embedded platforms.

A patch landed to add metadata (title and creation/modification date) to PDF documents generated for printing.

The “suspended” toplevel state is now handled in GTK port to pause rendering when web views are fully obscured.

Jamie Murphy is doing a Coding Experience focused on adding support for WebExtensions. After porting a number of Objective-C classes to C++, to allow using them in all WebKit ports, she has recently made the code build on Linux, and started adding new public API to expose the functionality to GTK applications that embed web views. There is still plenty of work to do, but this is great progress nevertheless.

Sylvia Li, who is also doing a Coding Experience, has updated WPEView so it will pick its default configuration values using the recently added WPESettings API.