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Didier Verna's Scientific Blog - Tag - face property Didier Verna's scientific blog: Lisp, Emacs, LaTeX and random stuff. 2024-01-31T17:45:28+00:00 Didier Verna urn:md5:a22c53786aff986a2da4c770c233a8f9 Dotclear XEmacs now has a "foreback" face property urn:md5:c4668448a9ece8521072d70a6bed0478 Tuesday, December 27 2011 Tuesday, December 27 2011 xemacs (X)Emacs Emacs Lispface propertyXEmacs <p><a href="https://www.didierverna.net/sciblog/public/screenshot_08.png" title="The &quot;foreback&quot; face property at work"><img src="https://www.didierverna.net/sciblog/public/.screenshot_08_s.jpg" alt="The &quot;foreback&quot; face property at work" style="float:left; margin: 0 1em 1em 0;" title="The &quot;foreback&quot; face property at work, Dec 2011" /></a>Here's another new face property in XEmacs. This one is probably not going to be used ever, but still it fixes one particular problem. Until now, XEmacs used the background and foreground colors to display a face background <em>bitmap</em> (as opposed to a regular pixmap). This basically rendered the text unreadable.</p> <p>The new face property is called "foreback" (I'm running short of sensible property names these days). It's the "foreground of the background" if you will. When a face has a background bitmap, it uses the regular background color for bitmap's background, but the foreback color for the bitmap's foreground. See the attached screenshot for a concrete example of the problem it fixes.</p> <p>The bitmap I used for this example is X11's <code>xsnow</code> bitmap. Nice Christmas XEmacs screenshot, isn't it? :-)</p> <p>In order to set a face's foreback color, either use the Custom interface, or the <code>set-face-foreback</code> function.</p> https://www.didierverna.net/blog/index.php?post/2011/12/27/XEmacs-now-has-a-foreback-face-property#comment-form https://www.didierverna.net/blog/index.php?feed/navlang:en/atom/comments/93 XEmacs now has a "flush" face property urn:md5:a4b2b093698cf5985132f87fbe812cad Thursday, December 22 2011 Thursday, December 22 2011 xemacs (X)Emacs Emacs Lispface propertyXEmacs <p><a href="https://www.didierverna.net/sciblog/public/mm-uu-extract.png" title="The &quot;flush&quot; face property at work"><img src="https://www.didierverna.net/sciblog/public/.mm-uu-extract_s.jpg" alt="The &quot;flush&quot; face property at work" style="float:right; margin: 0 0 1em 1em;" title="The &quot;flush&quot; face property at work, Dec 2011" /></a>I have just implemented a new face property in XEmacs 21.5, called "flush". When some text is displayed in a face which has this property set to <code>t</code> (it's a Boolean property), then the face extends until the right border of the window instead of just the end of the actual line of text. The effect is only visible if the face has a non-default background color or pixmap and gives the text segment the appearance of a block instead of being ragged right. In fact (if that rings a bell to you), this is the equivalent of the <code>block</code> value for the HTML <code>display</code> property.</p> <p>See the attached screenshot for an example. In that particular case, the buffer displays an article in Gnus and the concerned face is <code>mm-uu-extract</code>. You can see two versions of the same buffer, with and without the property set. There are a number of situations in which setting a face to flush is nicer visually. Probably the most obvious case is that of text selection. Below is a list of faces that I'm currently setting to flush. I'll be updating this list as needed. In order to set a face to flush, either use the Custom interface or the <code>set-face-flush-p</code> function directly.</p> <pre> zmacs-region diff-nonexistent-face gnus-summary-cancelled[-face] mm-uu-extract mmm-default-submode-face mmm-code-submode-face </pre> https://www.didierverna.net/blog/index.php?post/2011/12/22/XEmacs-now-has-a-flush-face-property#comment-form https://www.didierverna.net/blog/index.php?feed/navlang:en/atom/comments/92