[css-position-3] Refactor display/position/float computation section (deferring the floats rules to CSS2 until a css-floats spec exists, and taking advantage of the (relatively new) definition of blockification in css-display.

Author: fantasai

css-position-3/Overview.bs

@@ -278,6 +278,9 @@ Choosing A Positioning Scheme: 'position' property</h2>
 		</div>
 </dl>
 
+A 'position' value of ''position/absolute'' or ''position/fixed''
+[=blockifies=] the box
+and causes 'float' to compute to ''float/none''.
 
 <h3 id="def-cb">
 Containing Blocks of Positioned Boxes</h3>
@@ -1209,67 +1212,6 @@ Auto heights for block formatting context roots</h3>
 <!-- End section: Auto heights for block formatting context roots -->
 <!-- End section: Sizing and positioning details -->
 
-<h2 id="dis-pos-flo">
-Relationships between 'display', 'position', and 'float'</h2>
-
-	The three properties that affect box generation and layout &mdash; 'display',
-	'position', and 'float' &mdash; interact as follows:
-
-	<ol>
-		<li>
-		If 'display' has the value ''display/none'', then 'position' and 'float' do not apply.
-		In this case, the element generates no box.
-
-		<li>
-		Otherwise, if 'position' has the value ''absolute'' or ''fixed'',
-		and the value of 'float' is ''float/left'' or ''float/right'', the box is absolutely
-		positioned and the computed value of 'float' is ''float/none''. The 'display' is
-		set according to the table below. Positioning of the box will determined by
-		the 'top', 'right', 'bottom' and 'left' properties and the box’s
-		<a>containing block</a>.
-
-		<li>
-		Otherwise, if 'float' is other than ''float/none'', the box is <a>floated</a> and 'display' is set according to the table below.
-
-		<li>
-		Otherwise, if the element is the root element, 'display' is set according to the
-		table below.
-
-		<li>
-		Otherwise, the remaining 'display' property values apply as specified.
-	</ol>
-
-	<table class="relationship-table">
-		<tr>
-			<th>Specified value</th>
-			<th>Computed value</th>
-		</tr>
-		<tr>
-			<td>inline-table
-			<td>table
-		</tr>
-		<tr>
-			<td>
-				inline, <span>table-row-group</span>, <span>table-column</span>,
-				<span>table-column-group</span>,
-				<span>table-header-group</span>, <span>table-footer-group</span>,
-				<span>table-row</span>,
-				<span>table-cell</span>, <span>table-caption</span>, <span>inline-block</span>
-			
-			<td>block
-		</tr>
-		<tr>
-			<td>others 
-			<td><span>same as specified</span>
-		</tr>
-	</table>
-
-	<p class="note">
-		For new values defined for the 'display' property, the respective modules that define a
-		new value also define the handling of the relationship with positioning and floats.
-	</p>
-<!-- End section: Relationships between 'display', 'position', and 'float' -->
-
 <h2 id="comparison">
 Comparison of normal flow, floats, and positioning</h2>