From cyd@stupidchicken.com Sun Apr 20 07:45:55 2008
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From: Chong Yidong <cyd@stupidchicken.com>
To: submit@debbugs.gnu.org
Subject: window-line-height returns spurious OFFBOT values
Date: Sun, 20 Apr 2008 10:45:40 -0400
Message-ID: <87zlro1t63.fsf@stupidchicken.com>
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This appears to be a bug in the new font code.  When Emacs 23 uses a
non-fontconfig font, say:

Emacs.Font: -misc-fixed-medium-r-normal--13-*-*-*-c-70-iso8859-1

then (window-line-height -1) returns a non-zero OFFBOT element, saying
that the last line contains offscreen pixels, when in fact the last line
is completely inside the window.

To reproduce:

  (global-set-key [f1] (lambda () (interactive)
    (message (prin1-to-string (window-line-height -1)))))

Typing f1 in the scratch buffer gives me, e.g.,

  (9 39 510 4)
            ^

Emacs 22, using the exact same font in .Xresources, correctly returns a
zero OFFBOT.

Furthermore, Emacs 23, using a fontconfig font (Monospace-9), also
correctly returns a zero OFFBOT.




From cyd@stupidchicken.com Thu May 29 11:37:10 2008
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From: Chong Yidong <cyd@stupidchicken.com>
To: 152-done@debbugs.gnu.org
Subject: Re: window-line-height returns spurious OFFBOT values
Date: Thu, 29 May 2008 14:32:53 -0400
Message-ID: <87fxs1gduy.fsf@stupidchicken.com>
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> (window-line-height -1) returns a non-zero OFFBOT element, saying that
> the last line contains offscreen pixels, when in fact the last line is
> completely inside the window.

Seems to be fixed now.




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