[css-grid] Tweak the abspos issues.

--HG--
extra : rebase_source : 16b5ad5367d3e9e9b013ca0807f2960837afa34f

Author: tabatkins

css-grid/Overview.html

@@ -1161,21 +1161,10 @@ <h3 id=abspos-items><span class=secno>4.2. </span> Absolutely-positioned
    href="#grid-container"><i>grid container</i></a> does not participate
    directly in grid layout. Its static position is ???
 
-  <div class=issue>
-   <ul>
-    <li>The before/start corner of the grid container? (In this case, should
-     we adjust Flexbox to match?)
-
-    <li>The before/start edge of the cell it would be placed in, if it were a
-     1x1 auto-placed grid item? (Don't let it generate new rows/columns,
-     though, which complicates things.) (This is closer to Flexbox's current
-     behavior.)
-   </ul>
-  </div>
-
-  <p class=issue> Below is a proposal for how to deal with abspos in grid
-   containers. It gives us many of the capabilities of <a href="#CSS3GRID"
-   rel=biblioentry>[CSS3GRID]<!--{{CSS3GRID}}--></a>.
+  <p class=issue> The static position is affected by the alignment
+   properties, as if it was a 0x0 thing floating around in the containing
+   block. (Defaults to the start/start corner, since ‘<code
+   class=property>stretch</code>’ can't do anything to it.)
 
   <p> If an absolutely positioned element's <i>containing block</i> is
    generated by a <a href="#grid-container"><i>grid container</i></a>, the <a
@@ -1192,6 +1181,8 @@ <h3 id=abspos-items><span class=secno>4.2. </span> Absolutely-positioned
     <li>the padding edge of the <a href="#grid-container"><i>grid
      container</i></a> (as normal for abspos)
 
+    <li>the "default cell" of the grid, whenever we define that
+
     <li>the next/previous grid line (as normal for grid items with one ‘<a
      href="#track-size-auto"><code class=css>auto</code></a>’ value in a
      dimension, as it resolves to ‘<code class=css>span 1</code>’)
@@ -3746,16 +3737,6 @@ <h3 class=no-num id=other-references> Other references</h3>
   <dl class=bibliography>
    <dd style="display: none"><!-- keeps the doc valid if the DL is empty -->
     <!---->
-
-   <dt id=CSS3GRID>[CSS3GRID]
-
-   <dd>Alex Mogilevsky; Markus Mielke. <a
-    href="http://www.w3.org/TR/2007/WD-css3-grid-20070905"><cite>CSS Grid
-    Positioning Module Level 3.</cite></a> 5 September 2007. W3C Working
-    Draft. (Work in progress.) URL: <a
-    href="http://www.w3.org/TR/2007/WD-css3-grid-20070905">http://www.w3.org/TR/2007/WD-css3-grid-20070905</a>
-   </dd>
-   <!---->
   </dl>
   <!--end-informative-->
 

css-grid/Overview.src.html

@@ -832,19 +832,10 @@ <h3 id="abspos-items">
 		An absolutely-positioned child element of a <i>grid container</i> does not participate directly in grid layout.
 		Its static position is ???
 
-	<div class='issue'>
-		<ul>
-			<li>The before/start corner of the grid container?
-				(In this case, should we adjust Flexbox to match?)
-			<li>The before/start edge of the cell it would be placed in, if it were a 1x1 auto-placed grid item? 
-				(Don't let it generate new rows/columns, though, which complicates things.)
-				(This is closer to Flexbox's current behavior.)
-		</ul>
-	</div>
-
 	<p class='issue'>
-		Below is a proposal for how to deal with abspos in grid containers.
-		It gives us many of the capabilities of [[CSS3GRID]].
+		The static position is affected by the alignment properties, 
+		as if it was a 0x0 thing floating around in the containing block.
+		(Defaults to the start/start corner, since 'stretch' can't do anything to it.)
 
 	<p>
 		If an absolutely positioned element's <i>containing block</i>
@@ -856,6 +847,7 @@ <h3 id="abspos-items">
 	<div class="issue">
 		<ul>
 			<li>the padding edge of the <i>grid container</i> (as normal for abspos)
+			<li>the "default cell" of the grid, whenever we define that
 			<li>the next/previous grid line (as normal for grid items with one ''auto'' value in a dimension, as it resolves to 'span 1')
 		</ul>
 	</div>