[Webkit-unassigned] [Bug 181315] ::first-letter incorrectly selects grapheme pairs

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=181315

--- Comment #17 from Myles C. Maxfield <mmaxfield at apple.com> ---
Comment on attachment 330557
  --> https://bugs.webkit.org/attachment.cgi?id=330557
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=330557&action=review

> Source/WebCore/rendering/updating/RenderTreeBuilderFirstLetter.cpp:225
> +        length += U16_LENGTH(oldText.characterStartingAt(length));

Are we sure this is going to work? What if the first character is a combining sequence like U+0065 LATIN SMALL LETTER E followed by U+0300 COMBINING GRAVE ACCENT?

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