[css-writing-modes-3] Deferred auto-multicol to L4 as it was resolved to be at risk

Author: kojiishi

css-writing-modes-3/Overview.bs

@@ -2019,130 +2019,6 @@ Available Space in Orthogonal Flows</h4>
 
   <p>See [[!CSS3-SIZING]] for further details on CSS sizing terminology and concepts.
 
-<h4 id=auto-multicol>
-Auto-sizing Block Containers in Orthogonal Flows</h4>
-
-  <p>
-    If a box establishing an <i>orthogonal flow</i> is
-    either a block container or a multi-column element,
-    for the case where the box's <i>inline size</i> is ''width/auto'':
-
-  <ol>
-    <li><strong>Calculate the used 'column-width':</strong>
-    <ul>
-      <li>If 'column-count' and 'column-width' are both ''column-width/auto'',
-      use the shrink-to-fit formula
-      <code>min(<var>max-content</var>, max(<var>min-content</var>, <var>constraint</var>))</code>,
-      where:
-      <dl>
-        <dt><var>min-content</var>
-        <dd>the <a href="https://www.w3.org/TR/css3-sizing/#min-content-measure">min-content inline-size</a> of the box
-
-        <dt><var>max-content</var>
-        <dd>the <a href="https://www.w3.org/TR/css3-sizing/#max-content-measure">max-content inline-size</a> of the box
-
-        <dt><var>constraint</var>
-        <dd>the <i>inline-axis</i> size
-        that would match the box's <i>inline-axis</i> <a
- href="https://www.w3.org/TR/CSS22/box.html#outer-edge">outer edges</a> to the smaller of
-        <ul>
-          <li>the <i>available space</i>
-          <li>the initial containing block’s <i>size</i>
-      </dl>
-
-      <div class="note">
-        <div class=sidefigure>
-          <img src="images/auto-multicol.svg" width=200
-            alt="Diagram of automatically triggered multi-column preventing T-shaped documents">
-        </div>
-        <strong>Note that this requirement automatically triggers multi-column flow on all block containers.</strong>
-        This is so that overflowing content, instead of continuing off the side of the containing block,
-        is wrapped into columns in the flow direction of the containing block,
-        thus avoiding T-shaped documents.
-        Authors can control the <i>inline size</i> of these columns by setting 'column-width',
-        or disable this behavior by setting the <i>inline size</i> property
-        to a non-''width/auto'' value such as ''width/max-content''.
-        <br style="clear:both;">
-      </div>
-
-      <li>If 'column-count' is not ''column-count/auto'' and 'column-width' is ''column-count/auto'',
-      calculate the used 'column-width' with the same formula,
-      except replace <var>constraint</var> with
-      <var>constraint</var> &minus; ('column-count' &minus; 1) &times; 'column-gap'.
-
-      <li>If 'column-count' and 'column-width' are both non-''column-count/auto'',
-      the used 'column-width' is the computed 'column-width'.
-      (This is not recommended as it can cause overflow;
-      instead it is better to set the 'column-width' and a max-block-size.)
-    </ul>
-
-    <li><strong>Calculate the used column length:</strong>
-      If the computed <i>block size</i> is ''height/auto''
-      and the specified value of at least one of 'column-count' and 'column-width' was ''column-width/auto'',
-      use the box’s <i>block size</i> (if that is <i>definite</i>),
-      else the <i>fill-available block size</i> of the box (if that is <i>definite</i>),
-      else the box’s <i>max-content block size</i>.
-      Otherwise follow the normal rules for sizing a multi-column element.
-      <p class="issue">
-        Should we factor in the box’s <i>min-content block size</i> in this formula,
-        so that e.g. a large image will not overflow the box,
-        but cause the box to overflow the containing block?
-
-    <li><strong>Calculate the used 'column-count':</strong>
-      If the computed 'column-count' is ''column-count/auto'', then
-      the used 'column-count' follows from filling the resulting multi-column layout
-      with the box's content.
-  </ol>
-
-  <p>
-    The used <i>inline size</i> of the resulting multi-column element is then calculated:
-    <ol>
-      <li>If the content neither line-wraps nor fragments within the multi-column element,
-        then the used <i>inline size</i> is the <i>max-content inline size</i> of the box's contents.
-        This criteria gives the shrink-to-fit behavior for short orthogonal flow contents
-        without making a large blank space.
-      <li>Otherwise it is calculated from the used 'column-width', 'column-count', and 'column-gap'.
-    </ol>
-
-  <p>
-    The used <i>block size</i> of the box is either the used column length
-    (if multiple columns were used)
-    or the <i>max-content block size</i> of the content
-    (if only one column was used).
-
-  <p>
-    The UA may, instead of triggering multi-column layout for block containers as described above,
-    calculate the box's <i>block size</i> assuming infinite <i>available block space</i>,
-    thus laying out its contents into a single column.
-    (Note that this can, however, result in content that is clipped
-    or otherwise inaccessible if it overflows its containing block.)
-
-<h4 id="orthogonal-layout">
-Auto-sizing Other Orthogonal Flow Roots</h4>
-
-  <p>In order to limit the length of lines,
-  block containers have special auto-sizing behavior (defined <a href="#auto-multicol">above</a>)
-  when their <i>available inline space</i> is infinite
-  (which typically occurs when they establish an <i>orthogonal flow</i>).
-
-  <p>Other layout models simply lay out into the infinite <i>available inline space</i>
-  at their <i>max-content size</i>.
-  However, they pass through the infinite <i>available inline space</i>
-  to block containers they contain,
-  possibly triggering that special auto-sizing behavior on those block containers
-  even though they do not themselves establish an <i>orthogonal flow</i>.
-
-  <div class="example">
-    <p>For example,
-      a table or <i>flex container</i> establishing an <i>orthogonal flow</i>
-      is laid out into its given <i>available space</i>.
-      If its <i>available inline space</i> is infinite,
-      this effectively lays the box out at its <i>max-content size</i>.
-      However, any of its table cells or <i>flex items</i> that are <i>block containers</i>
-      are laid out assuming infinite <i>available inline space</i>
-      and so behave accordingly.
-  </div>
-
 <h4 id="orthogonal-pagination">
 Fragmenting Orthogonal Flows</h4>
 
@@ -2583,7 +2459,7 @@ Full-width Characters</h5>
   <ul>
     <li>Deferred the ''sideways-lr'' and ''sideways-rl'' values of 'writing-mode' to Level 4.
     <li>Deferred the ''digits'' value of 'text-combine-upright' to Level 4.
-    <li>Made the <a href="#auto-multicol">automatic multi-column behavior</a> of orthogonal flows optional.
+    <li>Made the automatic multi-column behavior of orthogonal flows optional.
   </ul>
 
   <h3 class="no-num" id="changes-201311">