Bug 261565

Summary: AX: text-transform: full-size-kana must not affect AT/speech output
Product: WebKit Reporter: fantasai <fantasai.bugs>
Component: AccessibilityAssignee: Nobody <webkit-unassigned>
Status: NEW ---    
Severity: Normal CC: andresg_22, jcraig, webkit-bug-importer
Priority: P2 Keywords: InRadar
Version: Safari Technology Preview   
Hardware: All   
OS: All   
URL: https://software.hixie.ch/utilities/js/live-dom-viewer/?%3C!DOCTYPE%20html%3E%0A%3Cstrong%20style%3D%22text-transform%3A%20full-size-kana%22%3Eじゅう%3C%2Fstrong%3E%20must%20read%20the%20same%20as%20じゅう%20not%20じゆう%20(but%20look%20like%20じゆう%20not%20じゅう)%20.%3Cbr%3E%0A%3Cstrong%20style%3D%22text-transform%3A%20full-size-kana%22%3E%20カップ%20%3C%2Fstrong%3E%20must%20read%20the%20same%20as%20カップ%20not%20カツプ%20(but%20look%20like%20カツプ%20not%20カップ)%20.%0A
Bug Depends on:    
Bug Blocks: 245557    

Description fantasai 2023-09-14 10:56:06 PDT
Overview
  text-transform: full-size-kana must not affect speech output.

Steps to Reproduce:
  1. Load testcase:
     https://software.hixie.ch/utilities/js/live-dom-viewer/?%3C!DOCTYPE%20html%3E%0A%3Cstrong%20style%3D%22text-transform%3A%20full-size-kana%22%3Eじゅう%3C%2Fstrong%3E%20must%20read%20the%20same%20as%20じゅう%20not%20じゆう%20(but%20look%20like%20じゆう%20not%20じゅう)%20.%3Cbr%3E%0A%3Cstrong%20style%3D%22text-transform%3A%20full-size-kana%22%3E%20カップ%20%3C%2Fstrong%3E%20must%20read%20the%20same%20as%20カップ%20not%20カツプ%20(but%20look%20like%20カツプ%20not%20カップ)%20.%0A
  2. Verify that 'text-transform: full-size-kana' is supported by comparing the visual rendering.
  3. Use VoiceOver to compare the speech rendering.

Additional Information:
  https://www.w3.org/TR/css-text-3/#text-transform-property
  Note that the mapping in the Small Kana Mapping Table is not a case mapping. These are different letters (with related, but different pronunciations) that happen to look similar. See examples in spec.
Comment 1 Radar WebKit Bug Importer 2023-09-14 10:56:17 PDT
<rdar://problem/115504070>
Comment 2 James Craig 2023-09-14 11:02:51 PDT
From some discussion with Elika, this might need to be limited to ruby, or at a minimum, we’d need test cases to make sure the other values (like text-transform: uppercase) were not affected by the change. 

Note that I’m still unclear as to why text-transform would be used in a way that affects the core meaning of the text, so perhaps we should discuss or require addition information before the change.
Comment 3 fantasai 2024-05-06 19:51:22 PDT
> Note that I’m still unclear as to why text-transform would be used in a way that affects the core meaning of the text, so perhaps we should discuss or require addition information before the change.


This is explained in detail in the spec (linked above).
Comment 4 fantasai 2024-06-24 14:52:48 PDT
`full-width` should also get the same treatment (use underlying untransformed text for AT), fwiw.