yellow highlight = changes since 2022-04-15 up to 2022-05-10

• Demos in this directory
• css-pseudo tests
• CSSWG/WPT patches
• CSSWG/WPT issues
• Chromium impl (1163437)
  • ::spelling-error + ::grammar-error (1035708)
  • new text-decoration-line values (1163436)
  • spec-compliant highlight painting (1147859)
  • HighlightOverlayPainting feature (including 1147859)
  • spec-compliant processing model (1024156)
  • highlight pseudo interactions with :visited (rego 1314629)
  • highlight text-decoration painting (including 1209248)
  • wavy text-decoration painting (including 668042)
  • unify ::selection + markers (selection rework)
  • unify wavy/dotted + squigglies (rego 1257553)
  • use counters

Demos in this directory

0. Multitool: classic text-decoration comparison
1. Representative example for intent to prototype
2. Supplementary example for intent to prototype
3. Highlight painting reftest: opaque with shadows (basis of hp-001)
4. Demonstration that Chromium does not allow non-highlight styling to split ligatures
5. Notes from my initial investigation into the highlight processing model
6. Multitool: highlight painting with shadows
7. Highlight painting reftest: translucent with decorations (basis of hp-003)
8. Highlight inheritance reftest: implicit and explicit defaulting
9. Demonstration of ::selection decoration regression (bug 1209248)
10. Test whether ::selection is repainted when styles change
11. Test whether box-shadow offset is invariant under writing-mode
12. Test whether color:initial suppresses UA default highlight colors for ::selection
13. Test whether text-shadow:none doesn’t suppress UA default highlight colors for ::selection
14. Test whether ::selection can combine its background-color with color inherited from ::first-letter
15. Visualisation of current and expected highlight painting orders with decorations
16. Highlight painting reftest: multiple highlight pseudos with decorations
17. Demonstration that Firefox wavy decorations are highly resilient to going out of phase
18. Test whether decorations extend into text-overflow:ellipsis or text-overflow:<string>
19. Demonstration that Safari on macOS overrides alpha of opaque ::selection background-color
20. Representative example for highlight inheritance
21. Test whether UA shadow roots can still be styled under highlight inheritance
22. Demonstration of potential compat issue for csswg-drafts#6774
23. Test whether HighlightInheritance works when there are no matched properties for CL:3237158
24. HighlightInheritance memory analysis test case (no selection, :root::selection rule) for bug 1024156
25. HighlightInheritance memory analysis test case (no selection, *::selection rule) for bug 1024156
26. HighlightInheritance memory analysis test case (main selected, :root::selection rule) for bug 1024156
27. HighlightInheritance memory analysis test case (main selected, *::selection rule) for bug 1024156
28. Minimal breaking test case for bug 1271782
29. Animated visualisations of highlight painting: decorations, shadows, and Chromium
30. Demonstration of interactions between highlights and decoration propagation for csswg-drafts#6829
31. Demonstration of highlight overlays with overlapping active ranges for CL:3426940
32. Demonstration of highlight overlays with overlapping active ranges for CL:3426940
33. Minimal breaking test case for bug 1295271
34. Demonstration of overlapping active ranges within a custom highlight for CL:3426940
35. Test for highlight overlay painting under ‘white-space’ and ‘text-transform’ for CL:3426940
36. Test whether ‘currentColor’ is inherited symbolically or as the resolved ‘color’ for CL:3506351
37. Demonstration of highlight overlays with their own text decorations for CL:3538562
38. Demonstration that Blink suppresses spelling markers that overlap suggestion markers for CL:3529115
39. Demonstration of explicit defaulting for the ‘color’ property on highlights for csswg-drafts#6774
40. Test for highlight inheritance with both universal and non-universal rules (basis of hc-005)
41. HighlightInheritance memory analysis test case (active, universal, all:inherit) for bug 1024156
42. Minimal breaking test case for bug 1321540

css-pseudo tests

• highlight-cascade 001 (ref), 002 (ref), 005 (ref)
• highlight-styling 001 (ref), 002 (ref)
• highlight-paired-cascade 001 (ref), 002 (ref), 003 (ref), 004 (notref), 005 (ref), 006 (ref)
• highlight-painting 001 (ref), 002 (ref), 003 (ref), 004 (ref1, ref2, ref3)
• selection-background-painting-order (ref1, ref2)
• selection-originating-decoration-color (ref)
• selection-originating-strikethrough-order (ref)
• selection-originating-underline-order (ref)

CSSWG/WPT patches

• WPT updates (CL:2624328)
• WPT improvements 1 (CL:2670609)
• css-pseudo <wpt> update 1 (w3c/csswg-drafts#5921)
• WPT improvements 2 (CL:2706442)
• css-pseudo <wpt> update 2 (w3c/csswg-drafts#6316)
• WPT rework regression tests (web-platform-tests/wpt#30283)
• WPT paired cascade tests (web-platform-tests/wpt#30688)
• WPT highlight style tests (web-platform-tests/wpt#30692)
• [NFC] WPT link@rel=author (web-platform-tests/wpt#30693)
• css-pseudo <wpt> update 3 (csswg-drafts#6603)
• css-pseudo prose tweaks (csswg-drafts#6662)
• css-pseudo custom properties edits (csswg-drafts#6663)
• css-pseudo paired cascade edits (csswg-drafts#6665)
• css-pseudo text decorations (csswg-drafts#6666)
• wavy decoration length tests (rego wpt#31540)
• css-pseudo color:currentColor/gCS edits for #6818 (csswg-drafts#7220)
• css-pseudo decoration propagation edits for #6829 (csswg-drafts#7221)
• css-pseudo applicable property list edits for #7101 (csswg-drafts#7222)
• remove incorrect ‘text-decoration-color’ test (wpt#33856)

CSSWG/WPT issues

• = has consensus and/or proposed edits
• ensuring contrast of highlight colors (rego csswg-drafts#6150)
• highlight text decoration painting (csswg-drafts#6022)
• highlights and custom properties (csswg-drafts#6264)
• clarify paired-cascading behaviour (csswg-drafts#6386)
• should decorations include ellipsis? (csswg-drafts#6531)
• highlights and :root custom properties (andruud csswg-drafts#6641)
• compat risk with mixed highlight colors (csswg-drafts#6774)
• highlight UA defaults and inheritance (csswg-drafts#6779)
• highlights and color:currentColor (csswg-drafts#6818)
• highlights and decoration propagation (csswg-drafts#6829)
• Safari’s “wash” and UA highlight color tweaks (csswg-drafts#6853)
• highlights and emphasis/underline properties (csswg-drafts#7101)
• highlights and ‘forced-color-adjust’ (csswg-drafts#7264)

Chromium impl (1163437)

::spelling-error + ::grammar-error (1035708)

• style support (CL:2606878)
• update macOS markers (rego CL:3139819)
• text-decoration-color support (rego CL:3162169)
• dynamic style changes support (rego CL:3177663)

new text-decoration-line values (1163436)

• parser support (rego CL:3194336)
• [NFC] rename TextDecoration to TextD’nLine (rego CL:3275457)
• [NFC] remove mutable in TextDecorationInfo (rego CL:3284869)
• [NFC] add TextDecorationInfo::LineDataForLine (rego CL:3290417)
• [NFC] eliminate array in TextDecorationInfo (rego CL:3291658)
• paint support (rego CL:3297885)
• paint support reland (rego CL:3306472)

spec-compliant highlight painting (1147859)

• ::selection backgrounds (CL:2647046)
• originating element shadows (CL:2649833)
• ::selection shadow clipping (CL:2658617)
• SkDrawLooper support patch (skia-review/361976)
• ::selection backgrounds reland (CL:2675603)
• [NFC] untangle NGTextFragmentPainter (CL:2682158)
• fix ::target-text/::highlight text (rego 1273943, CL:3302311)
• fix ::target-text/::highlight legacy (rego CL:3306483)
• fix unstyled custom highlight painting (1295271, daniec CL:3449336)
• impl color:currentColor for highlights (1295264, rego CL:3506351)

HighlightOverlayPainting feature (1147859, 1179938)

• initial highlight overlay painting system (CL:3426940)
• new perf test for custom highlight painting (rego CL:3461502)
• baseline perf test for custom highlight painting (rego CL:3468175)
• new perf test for spelling highlight painting (rego CL:3477155)
• fix for custom highlight perf test failures (rego CL:3489469)
• fix for custom highlight perf test failures (rego CL:3494097)
• new WPT tests for highlights with color:currentColor (rego CL:3497348)
• merge overlapping custom highlight ranges (CL:3529115)
• paint originating and highlight decorations (CL:3538562)
• fix currentColor with overlapping highlights (1295264, rego CL:3560449)
• highlight overlay decorations reland (CL:3608432)
• fix AutoDarkMode misuse in overlay painter (CL:3616195)
• fix invalidation error in decoration clipping (CL:3616323)
• call MarkerRectForForeground only when needed (CL:3636880)
• bump HighlightOverlayPainting to stable (CL:3616170)

spec-compliant processing model (1024156)

• CSS highlight processing model (CL:2850068)
• diff highlights as kInherited (CL:3197850)
• fix textpath-selection-011 (1254608, CL:3205136)
• inheritance for ::highlight (ffiori CL:3237158)
• blink_perf tests for legacy content (CL:3281363)
• devtools support, chromium half (daniec CL:3461424)
• enable inheritance for custom highlights (lusanpad CL:3498908)
• devtools support, devtools half (daniec CL:3502175)
• fix gCS under HighlightInheritance (andruud 1309822, rego CL:3548659)
• fix highlight gCS for color:currentColor (1295264, rego CL:3563099)
• devtools support, devtools patch 2 (daniec CL:3563627)
• legacy optimisation for universal highlight rules (CL:3581515)

highlight pseudo interactions with :visited (rego 1314629)

• new WPT test for highlights and :visited (rego CL:3578532)
• fix :visited under HighlightInheritance (rego CL:3579151)
• fix WPT test for highlights and :visited (rego CL:3580511)
• fix HasAuthorHighlightColors in links (rego CL:3581029)

highlight text-decoration painting (1209248, rego 1274174)

• fix ::selection regression (CL:2902289)
• merge above to M92 stable (CL:2925295)
• split originating/::selection (CL:2903387)
• recolor to color not t-d-color (CL:2903371)
• [NFC] tidy selection rect logic (CL:3108999)
• [NFC] HighlightPseudoMarker (rego CL:3303876)
• [NFC] HighlightPseudoMarkerListImpl (rego CL:3306581)
• [NFC] rename HighlightMarker (rego CL:3307433)
• text-decoration for marker highlights (rego CL:3344847)
• recolor originating in marker highlights (rego 1275986)

wavy text-decoration painting (including 668042)

• [NFC] simplify TextDecorationInfo::SetPerLineData (rego CL:3234465)
• ensure decorations always cover full length (rego CL:3237072)
• fix clipping bug in wavy decorations (rego CL:3264203)
• fix WPT importer bug on rel=mismatch (rego webkit r285414)
• ensure decorations always cover full length (rego webkit r285567)

unify ::selection + markers (design doc)

unify wavy/dotted + squigglies (rego 1257553)

use counters

• kSelectionBackgroundColorInversion (rego CL:2948753)
• kTextShadow{,NotNone}InHighlightPseudo (rego CL:3000164)