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* 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. |
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