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[CSS21] absolute positioning and overflow:scroll

From: Andrew Fedoniouk <news@terrainformatica.com>
Date: Wed, 25 Aug 2004 21:25:43 -0700
Message-ID: <000301c48b24$c18e2ba0$0601a8c0@ATHLON>
To: "www-style Mailing List" <www-style@w3.org>

Gentlemen, I would appreciate if somebody will answer or comment the
following:

Taken from [1]:
'top' attribute defines  "how far an absolutely positioned box's top margin
edge is offset below the top edge of the box's"
and for "elements whose containing block is based on a block-level element,
this property is an offset from the padding edge of that element."

Questions:
1) Can I assume that "top edge of the box's" means "top of content edge of
the box"?
2) What does "containing block is based on a block-level element" mean
exactly?

And this fragment is taken from [2]:

<cite>
Finally, consider this case where an absolutely positioned element is mixed
with an overflow parent.

Stylesheet:
  container { position: relative; border: solid; }
  scroller { overflow: scroll; height: 5em; margin: 5em; }
  satellite { position: absolute; top: 0; }
  body { height: 10em; }

Document fragment:
  <container>
   <scroller>
    <satellite/>
    <body/>
   </scroller>
  </container>

In this example, the "scroller" element will not scroll the "satellite"
element, because the latter's containing block is outside the element whose
overflow is being clipped and scrolled.
</cite>

What does "outside" mean here?

BTW: IE, Gecko and Opera all together do scroll such "satellite". Example:
http://www.terrainformatica.com/w3/abs.htm

Are there any plans in CSS3 to make position: absolute deprecated?

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[1] http://www.w3.org/TR/CSS21/visuren.html#position-props
[2] http://www.w3.org/TR/CSS21/visufx.html#overflow
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Thanks in advance. Honestly.

Andrew Fedoniouk.
http://terrainformatica.com
Received on Thursday, 26 August 2004 04:26:31 GMT

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