[css2] Changes to definition of the root's containing block, as per

bert-github · bert-github · commit 7dccfd7eecac · 2002-07-15T11:39:41.000Z
http://lists.w3.org/Archives/Member/w3c-css-wg/2002AprJun/0207.html --HG-- extra : convert_revision : svn%3A73dc7c4b-06e6-40f3-b4f7-9ed1dbc14bfc/trunk%401896
diff --git a/css2/changes.src b/css2/changes.src
@@ -1,6 +1,6 @@
 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
 <html lang="en">
-<!-- $Id: changes.src,v 2.24 2002-07-08 14:57:50 bbos Exp $ -->
+<!-- $Id: changes.src,v 2.25 2002-07-15 11:39:41 bbos Exp $ -->
 <HEAD>
 <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
 <TITLE>Appendix B: Changes</TITLE>
@@ -833,6 +833,18 @@ model</a></h4>
 <p>The value 'compact' for 'display' does not exist in CSS&nbsp;2.1.
 'Inline-block' is added.
 
+<h4 id="s-10-1"><a
+href="visudet.html#containing-block-details">Section 10.1 Definition
+of "containing block"</a></h4>
+
+<p>A suggestion has been added that UAs take the viewport as the
+containing block of the root element.
+
+<p>The containing block for an absolutely positioned element that has
+no absolutely or relatively positioned ancestor no longer defaults to
+the root element, but is undefined, with as a suggestion that UAs use
+the viewport.
+
 <h4 id="s-10-3-7"><a
 href="visudet.html#abs-non-replaced-width">Section 10.3.7 Absolutely
 positioned, non-replaced elements</a></h4>
diff --git a/css2/visudet.src b/css2/visudet.src
@@ -1,6 +1,6 @@
 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
 <html lang="en">
-<!-- $Id: visudet.src,v 2.51 2002-07-08 14:57:51 bbos Exp $ -->
+<!-- $Id: visudet.src,v 2.52 2002-07-15 11:39:41 bbos Exp $ -->
 <HEAD>
 <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
 <TITLE>Visual formatting model details</TITLE>
@@ -19,9 +19,12 @@ block</span></dfn> of the element. The containing block of an element
 is defined as follows:</p>
 
 <ol>
-<li>The containing block (called the initial containing block)
+<li>The containing block
 in which the <a href="conform.html#root">root
-element</a> lives is chosen by the user agent.
+element</a> lives is chosen by the user agent. It is suggested that
+UAs use a rectangle with the width and height of the viewport
+excluding scrolling mechanisms, anchored at the origin of the infinite
+canvas.
 
 <li>For other elements, if the element's position is 'relative' or 'static',
 the containing block is formed by the content edge of the nearest
@@ -58,8 +61,10 @@ are the bottom and left content edges of the last box of the ancestor.
 </ol>
 </ol>
 
-<p>If there is no such ancestor, the content edge of the root element's
-box establishes the containing block.
+<p>If there is no such ancestor, the contianing block is UA dependent,
+but it is suggested that UAs use a rectangle with the width and height
+of the viewport excluding scrolling mechanisms, anchored at the origin
+of the infinite canvas.
 </ol>
 
 <div class="example">
@@ -546,7 +551,8 @@ agent if the value of this property is different than 'auto'.
 with respect to the height of the 
 generated box's <a href="visuren.html#containing-block">containing
 block</a>. If the height of the containing block is not 
-specified explicitly (i.e., it depends on content height), the
+specified explicitly (i.e., it depends on content height), and this
+element is not positioned, the
 value is interpreted like 'auto'.
 <dt><strong>auto</strong>
 <dd>The height depends on the values of other properties. 
