Monday, September 28, 2015

Updates since last meeting (on Monday, September 14th): Scrolling (skobes, szager) [crbug.com/417782]

• Getting closer to enabling coordinated scrollbars everywhere. Currently enabled everywhere on Mac and Android but only for the main frame on Windows and Linux. With these changes the main frame will no longer be a special case and will instead use the overflow scroll implementation. (skobes)
• Have two patches out for review that change how we paint scroll arrows. Once those have landed we can turn on coordinated scrollbars on all platforms. (skobes)
• Will spent some time doing bug triage this week. (skobes)
• Looking to land patch to web scrollbar theme painter, starting to have a lot of dependent bugs, lots of of duplicate bug reports. (szager)
• Leading space char clusterfuzz bugs. (szager)
• Pushing forward to enable root layer scrolling for layout tests and starting to triage failures. (szager) CSS Flexbox (cbiesinger) [crbug.com/426898]
• Adding a use-counter for deprecated intrinsic sizing.
• Fixing up css working group test suite for flebox, hope patches will be accepted/merged soon.
• Import css test suite into layout test. Plan is that the css working group repository is the source of truth that we mirror periodically.
• Plan to upstream some more of our tests. CSS Grid Layout (svillar) [crbug.com/79180]
• No update since last week. Region-based multi-column support (mstensho) [crbug.com/334335]
• Multicol balancing refactoring (do it after layout). The multicol part of it has been ready for weeks, but before landing it, some changes to strut handling in the LayoutBlockFlow neighborhood are required. I've landed some simplification, clean-up and bugfixing CLs in the area on my way. Hopefully it's soon sensible enough to hold my changes without breaking under its own weight. (mstensho)
• Still working on pagination strut rewrite. Want to get it right and as pretty as possible first before landing. (mstensho) Add API for layout (leviw, pilgrim, ojan) [crbug.com/495288]
• Landed several large line layout patches, after one that is pending review we will have gotten rid of all LayoutObject references in InlineTextBox, i.e. we'll use go through the API for all layout calls. (pilgrim)
• Working our way up the hierarchy to get rid of the remaining calls not using the API in InlineBox. (pilgrim) Text (eae, drott, kojii)
• Meeting with Docs team to discuss text metrics, line layout needs. (eae)
• Working on fix for selection painting on high-DPI devices. (eae)
• Meeting with Android team to discuss sharing text layout implementation or parts thereof. (eae) Misc:
• Fixed a bug where the scrollWidth and scrollHeight where snapped differently than clientWidth and clientHeight. (leviw)
• Working with Windows team on re-implementing our high-DPI support to use our full-page-zoom logic instead of specialized code in the compositor. Will allow for much better support for non-integer device scale factors, reduce code complexity and (finally!) allow us to snap to device pixels instead of CSS pixels. (eae)
• Supporting houdini hackathon last week. (leviw)
• Houdini/custom layout discussions. (shans, eae, leviw, kojii)
• Landed change to disable selection gap painting! (wkorman)
• Mac 10.10 baselines. (leviw)
• Supporting work to enable color emoji on Windows. (eae) Logistics:
• eae in NYC Wed-Sat.