[css-flexbox] Define that min-size: auto is honored by percentages inside the item.

Author: fantasai

css-flexbox/Overview.bs

@@ -949,13 +949,10 @@ Implied Minimum Size of Flex Items</h3>
 		this traversal is trivial and therefore not a performance concern.)
 	</div>
 
-	In order to prevent cycling sizing,
-	the ''auto'' value of 'min-height' and 'max-height'
-	does not factor into the percentage size resolution of the box’s contents.
-	For example, a percentage-height block whose flex item parent has
-	''height: 120em; min-height: auto''
-	will size itself against ''height: 120em'' regardless of the impact
-	that 'min-height' might have on the used size of the flex item.
+	Although this may require an additional layout pass to re-resolve percentages in some cases,
+	the ''min-width/auto'' value of 'min-width' and 'min-height'
+	(like the ''min-content'', ''max-content'', and ''fit-content'' values defined in [[CSS3-SIZING]])
+	does not prevent the resolution of percentage sizes within the item.
 
 <h2 id="flow-order">
 Ordering and Orientation</h2>
@@ -3332,6 +3329,23 @@ Substantive Changes and Bugfixes</h4>
 			Add explicit conformance criteria on authoring tools
 			to keep presentation and DOM order in sync
 			unless author explicitly indicates a desire to make them out-of-sync.
+		<li id="change-2015-min-auto-intrinsic-percentages">
+			Defined that any size adjustment imposed by a box’s ''min-height/min-width: auto''
+			is consulted when percentage-sizing any of its contents.
+			(<a href="https://drafts.csswg.org/css-flexbox/issues-lc-20150514#issue-3">Issue 3</a>)
+			<blockquote>
+				<p><del>In order to prevent cycling sizing,
+				the ''auto'' value of 'min-height' and 'max-height'
+				does not factor into the percentage size resolution of the box’s contents.
+				For example, a percentage-height block whose flex item parent has
+				''height: 120em; min-height: auto''
+				will size itself against ''height: 120em'' regardless of the impact
+				that 'min-height' might have on the used size of the flex item.</del>
+				<p><ins>Although this may require an additional layout pass to re-resolve percentages in some cases,
+				the ''min-width/auto'' value of 'min-width' and 'min-height'
+				(like the ''min-content'', ''max-content'', and ''fit-content'' values defined in [[CSS3-SIZING]])
+				does not prevent the resolution of percentage sizes within the item.</ins>
+			</blockquote>
 	</ul>
 
 <h4 id="change-201505-clarify">
@@ -3561,6 +3575,7 @@ Substantive Changes and Bugfixes</h4>
 			Defined that any size adjustment imposed by a box’s ''min-height/min-width: auto''
 			is not consulted when percentage-sizing any of its contents.
 			(Issue <a href="http://dev.w3.org/csswg/css-flexbox-1/issues-lc-20140325#issue-27">27</a>)
+			This change was later reverted with an <a href="#change-2015-min-auto-intrinsic-percentages">opposite definition</a>.
 			<blockquote>
 				<p>In order to prevent cycling sizing,
 				the ''auto'' value of 'min-height' and 'max-height'

css-flexbox/Overview.html

@@ -303,7 +303,7 @@
   <div class="head">
    <p data-fill-with="logo"><a class="logo" href="http://www.w3.org/"> <img alt="W3C" height="48" src="https://www.w3.org/Icons/w3c_home" width="72"> </a> </p>
    <h1 class="p-name no-ref" id="title">CSS Flexible Box Layout Module Level 1</h1>
-   <h2 class="no-num no-toc no-ref heading settled" id="subtitle"><span class="content">Editor’s Draft, <time class="dt-updated" datetime="2015-11-10">10 November 2015</time></span></h2>
+   <h2 class="no-num no-toc no-ref heading settled" id="subtitle"><span class="content">Editor’s Draft, <time class="dt-updated" datetime="2015-12-01">1 December 2015</time></span></h2>
    <div data-fill-with="spec-metadata">
     <dl>
      <dt>This version:
@@ -1033,10 +1033,9 @@ <h3 class="heading settled" data-level="4.5" id="min-size-auto"><span class="sec
 		(For items with small amounts of content, however,
 		this traversal is trivial and therefore not a performance concern.)</p>
    </div>
-   <p>In order to prevent cycling sizing,
-	the <a class="css" data-link-type="maybe" href="#valdef-min-width-auto">auto</a> value of <a class="property" data-link-type="propdesc" href="https://drafts.csswg.org/css2/visudet.html#propdef-min-height">min-height</a> and <a class="property" data-link-type="propdesc" href="https://drafts.csswg.org/css2/visudet.html#propdef-max-height">max-height</a> does not factor into the percentage size resolution of the box’s contents.
-	For example, a percentage-height block whose flex item parent has <a class="css" data-link-type="propdesc" href="https://drafts.csswg.org/css2/visudet.html#propdef-height">height: 120em; min-height: auto</a> will size itself against <a class="css" data-link-type="propdesc" href="https://drafts.csswg.org/css2/visudet.html#propdef-height">height: 120em</a> regardless of the impact
-	that <a class="property" data-link-type="propdesc" href="https://drafts.csswg.org/css2/visudet.html#propdef-min-height">min-height</a> might have on the used size of the flex item.</p>
+   <p>Although this may require an additional layout pass to re-resolve percentages in some cases,
+	the <a class="css" data-link-type="maybe" href="#valdef-min-width-auto">auto</a> value of <a class="property" data-link-type="propdesc" href="https://drafts.csswg.org/css2/visudet.html#propdef-min-width">min-width</a> and <a class="property" data-link-type="propdesc" href="https://drafts.csswg.org/css2/visudet.html#propdef-min-height">min-height</a> (like the <span class="css">min-content</span>, <span class="css">max-content</span>, and <span class="css">fit-content</span> values defined in <a data-link-type="biblio" href="#biblio-css3-sizing">[CSS3-SIZING]</a>)
+	does not prevent the resolution of percentage sizes within the item.</p>
    <h2 class="heading settled" data-level="5" id="flow-order"><span class="secno">5. </span><span class="content"> Ordering and Orientation</span><a class="self-link" href="#flow-order"></a></h2>
    <p>The contents of a flex container can be laid out in any direction and in any order.
 	This allows an author to trivially achieve effects that would previously have required complex or fragile methods,
@@ -2893,6 +2892,22 @@ <h4 class="heading settled" id="change-201505-substantive"><span class="content"
     <li id="change-2015-a11y-tools"><a class="self-link" href="#change-2015-a11y-tools"></a> Add explicit conformance criteria on authoring tools
 			to keep presentation and DOM order in sync
 			unless author explicitly indicates a desire to make them out-of-sync. 
+    <li id="change-2015-min-auto-intrinsic-percentages">
+     <a class="self-link" href="#change-2015-min-auto-intrinsic-percentages"></a> Defined that any size adjustment imposed by a box’s <span class="css">min-width: auto</span> is consulted when percentage-sizing any of its contents.
+			(<a href="https://drafts.csswg.org/css-flexbox/issues-lc-20150514#issue-3">Issue 3</a>) 
+     <blockquote>
+      <p>
+       <del>In order to prevent cycling sizing,
+				the <a class="css" data-link-type="maybe" href="#valdef-min-width-auto">auto</a> value of <a class="property" data-link-type="propdesc" href="https://drafts.csswg.org/css2/visudet.html#propdef-min-height">min-height</a> and <a class="property" data-link-type="propdesc" href="https://drafts.csswg.org/css2/visudet.html#propdef-max-height">max-height</a> does not factor into the percentage size resolution of the box’s contents.
+				For example, a percentage-height block whose flex item parent has <a class="css" data-link-type="propdesc" href="https://drafts.csswg.org/css2/visudet.html#propdef-height">height: 120em; min-height: auto</a> will size itself against <a class="css" data-link-type="propdesc" href="https://drafts.csswg.org/css2/visudet.html#propdef-height">height: 120em</a> regardless of the impact
+				that <a class="property" data-link-type="propdesc" href="https://drafts.csswg.org/css2/visudet.html#propdef-min-height">min-height</a> might have on the used size of the flex item.</del>
+      </p>
+      <p>
+       <ins>Although this may require an additional layout pass to re-resolve percentages in some cases,
+				the <a class="css" data-link-type="maybe" href="#valdef-min-width-auto">auto</a> value of <a class="property" data-link-type="propdesc" href="https://drafts.csswg.org/css2/visudet.html#propdef-min-width">min-width</a> and <a class="property" data-link-type="propdesc" href="https://drafts.csswg.org/css2/visudet.html#propdef-min-height">min-height</a> (like the <span class="css">min-content</span>, <span class="css">max-content</span>, and <span class="css">fit-content</span> values defined in <a data-link-type="biblio" href="#biblio-css3-sizing">[CSS3-SIZING]</a>)
+				does not prevent the resolution of percentage sizes within the item.</ins>
+      </p>
+     </blockquote>
    </ul>
    <h4 class="heading settled" id="change-201505-clarify"><span class="content"> Clarifications</span><a class="self-link" href="#change-201505-clarify"></a></h4>
    <h3 class="heading settled" id="changes-201409"><span class="content"> Changes since the 25 September 2014 LCWD</span><a class="self-link" href="#changes-201409"></a></h3>
@@ -3100,7 +3115,8 @@ <h4 class="heading settled" id="change-201403-substantive"><span class="content"
      </blockquote>
     <li id="change-201403-min-auto-intrinsic-percentages">
      <a class="self-link" href="#change-201403-min-auto-intrinsic-percentages"></a> Defined that any size adjustment imposed by a box’s <span class="css">min-width: auto</span> is not consulted when percentage-sizing any of its contents.
-			(Issue <a href="http://dev.w3.org/csswg/css-flexbox-1/issues-lc-20140325#issue-27">27</a>) 
+			(Issue <a href="http://dev.w3.org/csswg/css-flexbox-1/issues-lc-20140325#issue-27">27</a>)
+			This change was later reverted with an <a href="#change-2015-min-auto-intrinsic-percentages">opposite definition</a>. 
      <blockquote>
       <p>In order to prevent cycling sizing,
 				the <a class="css" data-link-type="maybe" href="#valdef-min-width-auto">auto</a> value of <a class="property" data-link-type="propdesc" href="https://drafts.csswg.org/css2/visudet.html#propdef-min-height">min-height</a> and <a class="property" data-link-type="propdesc" href="https://drafts.csswg.org/css2/visudet.html#propdef-max-height">max-height</a> does not factor into the percentage size resolution of the box’s contents.