[Webkit-unassigned] [Bug 195176] New: [css-values-4] Support ic unit ("水" CJK water ideograph, U+6C34)

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Thu Feb 28 11:28:57 PST 2019


https://bugs.webkit.org/show_bug.cgi?id=195176

            Bug ID: 195176
           Summary: [css-values-4] Support ic unit ("水" CJK water
                    ideograph, U+6C34)
           Product: WebKit
           Version: Safari Technology Preview
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: CSS
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: browserbugs2 at gtalbot.org

CSS4 Values and Units, 6.1.1. Font-relative lengths section, ic unit
https://www.w3.org/TR/css-values-4/#ic
states

"
ic unit
Equal to the used advance measure of the “水” (CJK water ideograph, U+6C34) 
glyph found in the font used to render it.

This measurement is a typically an exact measure (in the few fonts with 
proportional fullwidth glyphs, an approximation) of a **single fullwidth 
glyph’s advance measure**, thus allowing measurements based on an expected 
glyph count.

In the cases where it is impossible or impractical to determine the 
ideographic advance measure, it must be assumed to be 1em.
"

9 Tests
-------

In horizontal-tb writing-mode:
http://w3c-test.org/css/css-values/ic-unit-001.html

With text-orientation: upright; and writing-mode: vertical-rl;
http://w3c-test.org/css/css-values/ic-unit-002.html

With text-orientation: mixed; and writing-mode: vertical-rl;
http://w3c-test.org/css/css-values/ic-unit-003.html

With text-orientation: sideways; and writing-mode: vertical-rl;
http://w3c-test.org/css/css-values/ic-unit-004.html

In horizontal-tb writing-mode:
http://w3c-test.org/css/css-values/ic-unit-008.html

With (initial) text-orientation: mixed; and writing-mode: vertical-rl;
http://w3c-test.org/css/css-values/ic-unit-009.html

With text-orientation: mixed; and writing-mode: vertical-rl;
http://w3c-test.org/css/css-values/ic-unit-010.html

With text-orientation: upright; and writing-mode: vertical-rl;
http://w3c-test.org/css/css-values/ic-unit-011.html

With text-orientation: sideways; and writing-mode: vertical-rl;
http://w3c-test.org/css/css-values/ic-unit-012.html


Right now, no browser supports any of these 9 tests

https://wpt.fyi/results/css/css-values?label=master

I searched for duplicate and did not find any.

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