Bug 41509 – Ranges for @font-face unicode-range must be separated by commas

• Component: CSS
• Status: RESOLVED FIXED

[Yuzo Fujishima]

http://dev.w3.org/csswg/css3-fonts/#unicode-range-desc says that multiple ranges separated by commas can be specified for unicode-range descriptor.

But as of r62335, WebKit considers such unicode-range as invalid.

For example,

@font-face {
    font-family:myfont;
    src: local('Courier');
    unicode-range: u+69, u+6a; /* 'i' and 'j' */
}

is erroneously treated as if it were

@font-face {
    font-family:myfont;
    src: local('Courier');
}

[Yuzo Fujishima]

Created attachment 60346 [details]
Fix for Bug 41509 - Multiple ranges for unicode-range causes parse error

Comment on attachment 60346 [details]
Fix for Bug 41509 - Multiple ranges for unicode-range causes parse error

Isn't this going to allow multiple consecutive commas, only commas, and no commas? The working draft doesn't appear to allow any of these.

I think the title and the description of the bug are wrong. WebKit currently supports space-separated lists of ranges, but the WD calls for comma separation.

[Yuzo Fujishima]

Created attachment 60496 [details]
Make operator checking more strict.

[Yuzo Fujishima]

Hi, mitz,

Thank you for the review.

I've:
- made the operator checking stricter
- added tests
- corrected existing tests that use space-separated ranges
- changed the bug's title.

There are a couple more layout tests that use the old space-separated syntax:

fast/text/international/resources/Mac-compatible-font-fallback.css
platform/win/svg/W3C-SVG-1.1/resources/Mac-compatible-font-fallback.css
platform/win/css2.1/resources/Mac-compatible-font-fallback.css

[Yuzo Fujishima]

Created attachment 60575 [details]
Also fixed LayoutTests/platform/win/css2.1/resources/Mac-compatible-font-fallback.css

[Yuzo Fujishima]

Hi, Thank you for the review.

(In reply to comment #6)
> There are a couple more layout tests that use the old space-separated syntax:
> 
> fast/text/international/resources/Mac-compatible-font-fallback.css
> platform/win/svg/W3C-SVG-1.1/resources/Mac-compatible-font-fallback.css

These don't contain space-separated values, do they?

> platform/win/css2.1/resources/Mac-compatible-font-fallback.css

Fixed this.

I've grep'ed all the files under LayoutTests as follows and found no others.

$ find LayoutTests | xargs grep -i 'unicode-range.*u+[^;,]*  *u'
LayoutTests/fast/css/font-face-multiple-ranges-for-unicode-range.html:    unicode-range: u+69 u+6a ; /* 'i' and 'j' */

[Yuzo Fujishima]

Committed r62530: <http://trac.webkit.org/changeset/62530>

[Eric Seidel (no email)]

I wonder if this affects <svg::font-face> and if we need further testing for such.

[WebKit Review Bot]

http://trac.webkit.org/changeset/62530 might have broken Qt Linux Release