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Re: describe-text-properties highlighting and mouseover face is broken

From: Juri Linkov
Subject: Re: describe-text-properties highlighting and mouseover face is broken
Date: Mon, 27 Jun 2005 02:27:38 +0300
User-agent: Gnus/5.110004 (No Gnus v0.4) Emacs/22.0.50 (gnu/linux)

> This is what is displayed by describe-text-properties (interactively):
> Text content at position 4688:
> There are text properties here:
>   face                 [font-lock-function-name-face]
>   fontified            t
> Mouseover the button [font-lock-function-name-face], which is the only
> hot zone, shows no highlighting. It should presumably be highlighted
> on mouseover.

Since this button works like a link, perhaps it should be highlighted
with mouse-face.

> In my customized Emacs, the "face" and "fontified" text, and all
> surrounding whitespace, is underlined - haven't taken the time to
> find out why.
> In Emacs -q, nothing is underlined, and font-lock-function-name-face
> is bold.

When Emacs can't display italic, it uses underline.  The file faces.el
has this face spec:

(defface italic
  '((((supports :slant italic))
     :slant italic)
    (((supports :underline t))
     :underline t)
     ;; default to italic, even it doesn't appear to be supported,
     ;; because in some cases the display engine will do it's own
     ;; workaround (to `dim' on ttys)
     :slant italic))
  "Basic italic font."
  :group 'basic-faces)

Juri Linkov

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