servo/components/style/properties
Martin Robinson aa073c3dca
layout: Implement support for line-height and vertical-align (#30902)
* layout: Implement support for `line-height` and `vertical-align`

This is an initial implementation of proper `line-height` and
`vertical-align` support. While this change includes the bulk of the
work there are still many missing pieces for full support. In particular
some big missing things are:

 - Flex containers do not properly compute their baselines. The idea is
   to tackle this in a followup change. This causes various flex tests
   to start failing because everything used to be top aligned.
 - The implementation of the line-height quirks (only active in quirks
   mode) are incomplete. While the quirk works in many cases, there are
   still some cases where it is handled incorrectly. This requires more
   redesign and refinement, better suited for a followup.
 - Most of the features are CSS 3 such as precision control of the
   baseline and first and last baselines are not implemented. This
   change gets us close to CSS 2.x support.

While there are many new test passes with this change some tests are
starting to fail. An accounting of new failures:

Tests failing also in Layout 2013:
 - /css/css2/positioning/toogle-abspos-on-relpos-inline-child.html (only passes in Chrome)
 - /css/CSS2/fonts/font-applies-to-001.xht (potentially an issue with font size)

Invalid tests:
 - /css/CSS2/visudet/inline-block-baseline-003.xht
 - /css/CSS2/visudet/inline-block-baseline-004.xht
 - These are are failing in all browsers. See https://bugs.chromium.org/p/chromium/issues/detail?id=1222151.

Missing table support:
 - /_mozilla/mozilla/table_valign_middle.html

Missing `font-size-adjust` support :
 - /css/css-fonts/font-size-adjust-zero-2.html (also failing in 2013)

Incomplete form field support :
- /html/rendering/widgets/the-select-element/option-add-label-quirks.html (label isn't rendered so button isn't the right size in quirks mode due to line height quirk)

Need support for calculating flexbox baseline:
 - /css/css-flexbox/fieldset-baseline-alignment.html
 - /css/css-flexbox/flex-inline.html
 - /css/css-flexbox/flexbox-baseline-multi-line-horiz-001.html
 - /css/css-flexbox/flexbox-baseline-single-item-001a.html
 - /css/css-flexbox/flexbox-baseline-single-item-001b.html

Failing because we don't create anonymous inline boxes for text children of blocks:
- /css/CSS2/linebox/anonymous-inline-inherit-001.html

Passes locally (potentially related to fonts):
 - /css/CSS2/css1/c414-flt-fit-004.xht
 - /css/css-transforms/transform-input-017.html
 - /html/obsolete/requirements-for-implementations/the-marquee-element-0/marquee-min-intrinsic-size.html
 - /css/css-fonts/first-available-font-005.html
 - /css/css-fonts/first-available-font-006.html

* Some cleanups after live review with @mukilan

Also update results.
2024-01-08 14:49:50 +00:00
..
helpers style: Clean up Context::for_non_inherited_property 2023-11-24 08:57:14 +01:00
longhands layout: Implement support for line-height and vertical-align (#30902) 2024-01-08 14:49:50 +00:00
shorthands style: Do not snap -webkit-text-stroke-width to dev pixels 2023-11-24 08:57:14 +01:00
build.py Make the choice of layout runtime setting 2023-07-06 14:49:24 +02:00
cascade.rs style: Clean up Context::for_non_inherited_property 2023-11-24 08:57:14 +01:00
computed_value_flags.rs style: Container units should prevent us from sharing style by rule node 2023-11-24 08:57:14 +01:00
counted_unknown_properties.py style: Remove obsolete comment to add use counter for developing CSS properties 2023-11-24 08:57:14 +01:00
data.py style: Implement parsing for baseline-source 2023-11-24 08:57:14 +01:00
declaration_block.rs style: Rustfmt servo/. r=zrhoffman 2023-11-24 08:57:14 +01:00
gecko.mako.rs style: Simplify border snapping 2023-11-24 08:57:14 +01:00
helpers.mako.rs style: Clean up Context::for_non_inherited_property 2023-11-24 08:57:14 +01:00
Mako-1.1.2-py2.py3-none-any.whl style: Update mako in the style system. 2020-04-16 16:35:07 +02:00
mod.rs style: Rustfmt servo/. r=zrhoffman 2023-11-24 08:57:14 +01:00
properties.html.mako Generate apis.html and css-properties.json for docs as part of crates’ build scripts 2019-07-30 08:37:33 +02:00
properties.mako.rs style: Improve border shorthand serialization 2023-11-24 08:57:14 +01:00