[Webkit-unassigned] [Bug 183547] New: Reproducible phantom spaces are rendered using custom font
bugzilla-daemon at webkit.org
bugzilla-daemon at webkit.org
Sun Mar 11 13:16:12 PDT 2018
https://bugs.webkit.org/show_bug.cgi?id=183547
Bug ID: 183547
Summary: Reproducible phantom spaces are rendered using custom
font
Product: WebKit
Version: Safari 11
Hardware: Macintosh
OS: macOS 10.13
Status: NEW
Severity: Normal
Priority: P2
Component: Layout and Rendering
Assignee: webkit-unassigned at lists.webkit.org
Reporter: xiaodi.wu at gmail.com
CC: bfulgham at webkit.org, simon.fraser at apple.com,
zalan at apple.com
Created attachment 335543
--> https://bugs.webkit.org/attachment.cgi?id=335543&action=review
Screenshot of errant space highlighted (another example is visible in the first line of the screenshotted text)
The same rendering issue does not occur using Chrome on the same machine.
When CSS is enabled (under the "Develop" menu), some confluence of events causes Safari to render what appears to be an extra space, which is not present in the markup. The space can be highlighted, but Safari appears to think that the highlighted text is in fact the following glyph. Every subsequent glyph in the remainder of the line appears to be offset in relation to its highlight. This issue disappears upon disabling CSS, but reliably reappears in the same spot after re-enabling CSS.
Attached is a screenshot of the relevant behavior.
The URL for the document is (at present):
https://numerics.diploid.ca/floating-point-part-1.html
The relevant custom fonts are Source Sans Pro and, for monospace not used in that line, Inconsolata; both are loaded from Google Fonts.
Expected behavior:
Correct rendering of the text, with glyphs not offset from the highlight.
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