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Monday, February 1, 2016

Updates since last meeting (on Monday, January 25th):

Scrolling (skobes, szager) [crbug.com/417782]
- Prototyping scroll anchoring and added a flag for enabling it,
  --enable-scroll-anchoring. Working on a basic implementation. Current
  design looks solid and well encapsulated. Still needs testing in the
  real world but looks promising. (skobes)
- Changed LayoutRoots to avoid making scrollbars trigger relayout.
  (leviw)

CSS Flexbox (cbiesinger) [crbug.com/426898]
- Fixed a number of flexbox regressions last week. As of now all known
  regressions in 49 and 50 have been resolved. Most 48 regression have
  been addressed, merged a last fix this morning.
- Flexbox interop work continues, including a follow up to a temporary
  fix for a regression.

CSS Grid Layout (svillar, jfernandez, rego, javif) [crbug.com/79180]
- No update since last meeting.

CSS Multi-column (mstensho) [crbug.com/334335]
- Intent to unprefix multicol as is turned out not to be too popular.
  Gated on generic breaking properties. Will send out a separate intent
  for that. Breaking properties are generic and apply to all paginated
  (and in theory region based) content. Not simply an alias for -webkit
  prefixed properties as the values differ.
- Fixed a number of multi-col bugs.

CSS Houdini (ikilpatrick)
- Presented custom paint, custom properties and custom layout at CSS
  working group meeitng in Sydney. (ikilpatrick)
- Updated custom paint, custom properties and custom layout specifications.
 (ikilpatrick)
- Barista for the houdini working group, exceeding expectations.
  (ikilpatrick)

Add API for layout (leviw, pilgrim, ojan) [crbug.com/495288]
- Moved resolvedColor to use line layout api, had a lot of cascading
  effects that allows for simplifications in TextPainter and further
  allows the API to be used in unit tests. Nice properties and
  simplification ensued. (pilgrim)
- Multiple line layout patches includes a potential large change to the
  API that was discussed last week. Fully up to speed on api work and
  have a few layout patches pending. (dgrogan)

CSS Containment (leviw) [crbug.com/312978]
- Discussed CSS containment at CSS working group meeting, positive signals
  from working group and other implementors. (leviw)

Intersection Observer (szager, mpb) [crbug.com/540528]
- Added optimization to skip render-throttled iframes during hit
  testing. (szager)

Text (eae, drott, kojii)
- Presented CSS Writing Modes, CSS Text Decorations, and Snap at CSS
  Working Group meeting in Sydney. (kojii)
- Emoji segmentation, tests on all platforms. Some blockers on Android
  due to lack of capabilities with regard to font family based font
  selection for fallback. (drott)
- Enabling open type features through CSS keywords. (kojii)
- Dealing with regressions and fallout following font fallback overhaul.
  (drott)

HTML Tables (dgrogan)
- Misc table interop fixes relating to percentage height resolution.
  (dgrogan)
- Working on a table regression dating back to the WebKit days, will
  send out to Morten for review later today. (dgrogan)

Misc
- Made int to layout unit conversion explicit to avoid unnecessary
  round-trips and v8 problems during style conversion. (leviw)

Logistics:
- ikilpatrick, leviw, kojii, and eae in Sydney for Houdini and CSS WG
  meetings. https://wiki.csswg.org/planning/sydney-2016
- drott, behdad, kojii in Tokyo for Text workshop February 19-28.
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