2cultures.net(.au)

WebKit saw 717 new revisions last week, and this update discusses them up to r146744.

Work has started enabling Web Inspector to report various CSS parsing errors, such as mismatched braces and missing semicolons. A menu has been added allowing you to customize the panels displayed in the toolbar, capitalization of menu items has been made consistent and IndexedDB data may now be cleared.

WebKit’s Content Security Implementation will now fire a SecurityPolicyViolation event whenever violations occur, and will include the effective-directive key in violation reports as well.

Intrinsic sizing (i.e. min-content) now work on flexible box elements, and parsing for the -webkit-each-line value for CSS 3′s text-indent property got implemented as well. The Grid Layout implementation now supports default grid item sizing, and can parse the grid-auto-{column, row} CSS properties.

Apple’s JavaScript engine ninja Filip Pizlo filed a series of bugs covering some future plans and experiments in regards to JavaScriptCore. Ideas including changing it to a quadruple-tier virtual machine, allowing it to do more optimizations for longer running scripts, running the optimizer on awesome new threads and experimenting with LLVM as a backend.

Other changes which occurred last week:

• Skia is now able to use an accelerated hardware path for feConvolveMatrix filters.
• The new calendar picker now has support for touch input.
• The QtWebKit port enabled support for -webkit-font-smoothing and kerning, when available.
• The Mac port now exposes a setting to remove scripts from the markup.
• Chromium now supports the Storage Quota API in workers.
• Chromium also received plumbing towards supporting the Speech Synthesis APIs.

This update discusses last week’s 718 changes to WebKit, up to revision 144595.

Web Inspector will now show raster tasks on the Timeline Panel. Furthermore, the various profiling tools, such as the JavaScript CPU Profiler, canvas profiler and the memory snapshots, have been moved in separate panels.

When enabling the CSP 1.1 implementation, the new directives will now work on the unprefixed header as well. The meta referrer directive will now be honored for window.open() calls,the X-Frame-Options header accepts the “ALLOWALL” value and no callback is required anymore for requesting a notification permission. Rules for up and down-mixing channels in the Web Audio API have been implemented, and collapsing rules for empty buttons have been corrected.

The :first-letter pseudo element is now being ignored in flexible box elements. Dave rewrote the stacking model for the new multiple column implementation to be spec compliant and made sure transformed objects show up. CSS Shaders’ non-separable color and luminosity blend modes have been implemented, and parsing of CSS’ transition-property property has been improved.

Work on refreshing the calendar picker in WebKit continues with various new components, among which support for scrollbars, a month popup view and a table view for the calendar itself.

One feature that is nearing completion is the threaded HTML tokenizer. Now that more tests have been fixed and some optimizations have been done, it’s been enabled for Chromium’s DumpRenderTree.

Other changes which occurred last week:

• The amount of files to compile when changing WebKit’s network or clipboard code has been decreased.
• WebKit will now share the user agent string when opening a new Web Socket connection.
• A JavaScriptCore JIT for 64-bit Windows platforms has been implemented.
• iOS’ accessibility layout tests have been upstreamed to the WebKit.
• The registerProtocolHandler method has been disabled for Android, as it didn’t work yet.
• The GTK port has disabled MathML support in release builds.
• WebKitQt enabled support for the canvas Path object and for link prefetching.
• Philip Rogers has become a WebKit Reviewer, congratulations!

This update describes the 725 WebKit commits that landed last week, up to revision 143146.

Within Web Inspector, an option has been added to split the Elements and Source sidebars in two separate panes. DOM nodes are now being highlighted when hovering over them in the Debug panel, the ability to have whitespace indicators now is experimental and the re-do feature in the text editor will now move the selection past the text.

Support for the “ch” CSS unit has been added to WebKit, which matches the width and spacing of the “0″-glyph in the current font. The @supports at-rule now has improved error recovery, the “src” property in @filter at-rules can now be parsed correctly and the correct behavior of the -webkit-margin-collapse property has been implemented.

Changing an element’s border or padding will now re-layout its children, intrinsic widths on replaced elements -such as images- are now more accurate and Opera’s Morten Stenshorne made WebKit stop ignoring column rules wider than the gaps. CSS Exclusions’ shape-inside property now defaults to outside-shape, and shape-inside now supports circles.

Support for the ::distributed() pseudo-element, part of the Shadow DOM specification, has been implemented. Pablo also landed support for the CSS.supports() method, which is the DOM API specified in the CSS Conditional Rules module.

The threaded HTML parser has been updated to pass all layout tests, and the preload scanner has been enabled as part of the background parsing thread after parts of it have been updated to be therad safe.

Other changes which occurred last week:

• WebKit’s Web Intents implementation has been removed from the repository.
• The WebKit GTK port enabled support for CSS’ image-set and CSS Variables in development builds.
• Support for the Page Visibility API has been enabled for the iOS port.
• An OpenCL-accelerated implementation of SVG’s flood filter has been added.
• Ryosuke uploaded a replacement for CIA.

This update discusses the 1,522 WebKit changes that landed in the past two weeks, up to revision 137871.

The Toolbar Icons in Web Inspector won’t be shown by default anymore. The gear icon immediately goes to the Settings dialog again. Newly added items to the Network Panel will now be applied to filtering and cookies can be sorted by their size again. The viewport-related warning messages have been cleaned up, a new warning has been added for scripts blocked by @sandbox and messages created by console.time and timeEnd() can now be filtered out.

Support has been added for the “widows”, “orphans” CSS properties, as well as for the “ruby-position” property. The text-orientation property now supports the “sideways-right” value and text decorations will now work correctly when text-combine is being used as well. Furthermore, out-of-range values will now be clamped to values the supported range. Applying SVG filters to elements through the url() syntax will now work even when the filter isn’t available yet, and CSS Exclusions’ shape-inside is now supported for multiple-segment polygons.

Elliot moved generated content in :before and :after CSS pseudo-elements to the DOM, which also means that supporting animations and transitions on them is close. The Shadow DOM’s ShadowRoot constructor is gone, XMLHttpRequests for blob data will now set their Content-Type header accordingly and status events will now be fired for <link rel=prerender> elements. The Web Audio API now supports an offline audio context and the ::cue pseudo-element for video elements now is supported as well.

Support for in-band text tracks is now available on the Mac port, and plumbing has been added to allow deferring displaying of text tracks to the embedder.

Following the final pieces of it’s implementation, Alexis enabled support for the new background-position offset syntax on several platforms before enabling it by default, and removing the feature flag altogether. Meanwhile Tab started on aligning WebKit’s gradient implementation with the specification, towards unprefixing.

As for more experimental features, work on implementing CSS Grid Layout continues with improved and viewport-relative breadth sizes” href=”http://trac.webkit.org/changeset/136432″>and layouting capabilities. Rick started working on supporting -webkit-image-set() on cursors, too.

Other changes which occurred these weeks:

• All of Opera’s submitted <track> tests have been imported to WebKit’s Layout Test suite.
• Filip introduced a new profiler to the JavaScriptCore engine.
• Transferring large strings to workers through postMessage is now up to ten times faster for v8.
• The copy of the Acid3 test in WebKit’s sources has been updated to the latest version.
• WebKit’s old implementation of an Animation API has been removed from the code.
• A Web Inspector server for the EFL Port using WebKit2 has been added.
• A Chromium for Android performance bot was added to WebKit’s waterfall.
• The BlackBerry port enabled support for the image-resolution CSS property, and now uses libjpeg-turbo.
• The EFL port enabled support for WebGL by default.
• Chromium has enabled support for the Resource and User Timing APIs.
• The Apple Windows port enabled support for the <track> element.

This belated update talks about the 575 WebKit patches that landed last week, up to revision 135681.

Web Inspector has enabled JSON previews for text/html XMLHttpRequests. Line numbers in the timeline panel are now searchable and pressing the Ctrl+End shortcut in the code editor will bring you to the last character again.

Erik continued with his renaming of DOM Exception names. The CSS Device Adaptation implementation is now able to apply the resolved viewport rules and, when enabled, exposes an API to the DOM. Text Autosizing’s display of nested comments on reddit.com has been vastly improved, changing relatively positioned elements to being statically positioned now puts them in the right spot and CSS Exclusions’ shape-outside values are now accepted on shape-inside as well. Alexis landed CSS B&B3-compliant parsing support for the background-position property.

The IDBDatabaseException object has been removed in its entirety. Initial infrastructure has been created allowing ports to handle in-band subtitle tracks, a new layer stack has been added to accommodate the needs of both the Fullscreen API and the <dialog> element, and biquad filter nodes for the Web Audio API now have a “detune” attribute.

The feature flag for the DAP Proximity Events feature landed. A few other potentially upcoming features were discussed on the WebKit mailing lists last week as well, namely using OpenCL for filters, Pointer Events, the Screen Orientation API and adding the <main> element.

Other changes that occurred last week:

• James started working on Resource Timing tests, in W3C style so they can be submitted.
• The EFL port added support for using the ATK library for Accessibility support.
• Chromium for Mac switched to WebKit’s TCMalloc, improving DOM modification performance by up to 15%.
• Chromium enabled support for the datalist UI for datetime and datetime-local input fields.
• Qt separated all their code that depends on QWidget in a separate static library.