[Webkit-unassigned] [Bug 114359] New: [Qt] If the first font-family of the list is not known, the others are ignored

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=114359

           Summary: [Qt] If the first font-family of the list is not
                    known, the others are ignored
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: PC
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P3
         Component: New Bugs
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: misterk72 at free.fr


Created an attachment (id=197270)
 --> (https://bugs.webkit.org/attachment.cgi?id=197270&action=review)
Layout test case

Consider the following examples:
    font-family: ThisFontIsInvalid, monospace
and
    font-family: monospace, ThisFontIsInvalid

They should both display the text using the monospace font.

In QtWebKit 4.8.0 and 4.8.4, the first example displays the text incorrectly using the system default font and the second example displays the text using monospace font.
The problem doesn't occur with the demo browser provided with QtWebKit 5.0.1.

I attach a layout test case that highlights the issue.
I used the offsetWidth property of inline <p> elements to determine whether the font used for the two paragraphs is the same, if there is a more elegant solution it is welcome.

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