[css-grid-1] Use min-content/max-content max track sizes as limits on the items' contributions when sizing auto tracks under a min/max-content constraint. #3565 [Tentative pending WG review.]

Author: fantasai

css-grid-1/Overview.bs

@@ -3939,16 +3939,22 @@ Resolve Intrinsic Track Sizes</h3>
 				<dt>For auto minimums:
 				<dd>
 					If the track has an ''auto'' <a>min track sizing function</a>
-					and the <a>grid container</a> is being sized under a <a lt="min-content constraint">min/max-content constraint</a>,
+					and the <a>grid container</a> is being sized
+					under a <a lt="min-content constraint">min-</a>/<a>max-content constraint</a>,
 					set the track's <a>base size</a>
-					to the maximum of its items’ <a lt="min-content contribution">min/max-content contributions</a>,
-					respectively,
-					each limited by the <a>max track sizing function</a>
-					if that is <a lt="fixed sizing function">fixed</a>
-					and ultimately floored by its <a>minimum contribution</a>.
+					to the maximum of its items’
+					<a lt="limited min-content contribution">limited min-/max-content contributions</a> (respectively),
+					floored at zero.
+					The <dfn noexport id="limited-contribution" lt="limited min-content contribution | limited max-content contribution">limited min-/max-content contribution</dfn> of an item
+					is (for this purpose) its <a lt="min-content contribution">min-</a>/<a>max-content contribution</a> (accordingly);
+					limited by the <a>max track sizing function</a>
+					if that is <a lt="fixed sizing function">fixed</a>,
+					else by it's own <a lt="min-content size">min-content</a>/<a>max-content size</a>
+					if that is ''grid-template-columns/min-content''/''grid-template-columns/max-content'';
+					and ultimately floored by its <a>minimum contribution</a> (defined below).
 
 					Otherwise,
-					set its <a>base size</a>
+					set the track's <a>base size</a>
 					to the maximum of its items’ <a>minimum contributions</a>,
 					floored at zero.
 					The <dfn noexport id="min-size-contribution">minimum contribution</dfn> of an item is
@@ -3958,7 +3964,7 @@ Resolve Intrinsic Track Sizes</h3>
 					as its <a>preferred size</a>
 					('width' or 'height', whichever matches the relevant axis)
 					if its computed <a>preferred size</a> [=behaves as auto=],
-					or else the item’s <a>min-content contribution</a>.
+					or else the item’s <a>min-content contribution</a> otherwise.
 
 					Note: For items with a specified minimum size of ''min-width/auto'' (the initial value),
 					this is usually equivalent to a min-content minimum--

css-grid-1/issues-cr-2017.bsi

@@ -375,3 +375,17 @@ From:     Oriol Brufau
 Comment:  https://github.com/w3c/csswg-drafts/issues/3565
 Open
 ----
+Issue 43.
+Summary:  Statement about min overriding max
+From:     Oriol Brufau
+Comment:  https://github.com/w3c/csswg-drafts/issues/3567
+Open
+----
+Issue 44.
+Summary:  Reference to flexible min track sizing functions, which don't exist
+From:     Oriol Brufau
+Comment:  https://github.com/w3c/csswg-drafts/issues/3568
+Response: https://github.com/w3c/csswg-drafts/issues/3568#issuecomment-458746482
+Closed:   Accepted
+Resolved: Bugfix
+----

css-grid-1/issues-cr-2017.html

@@ -412,6 +412,20 @@ <h1>CSS Grid Layout Level 1 Disposition of Comments for 2017-12-14 CR</h1>
 <span>From:     Oriol Brufau</span>
 <span>Comment:  <a href='https://github.com/w3c/csswg-drafts/issues/3565'>https://github.com/w3c/csswg-drafts/issues/3565</a></span>
 <span>Open</span></pre>
+<pre class='open ' id='issue-43'>
+<span>Issue 43. <a href='#issue-43'>#</a></span>
+<span>Summary:  Statement about min overriding max</span>
+<span>From:     Oriol Brufau</span>
+<span>Comment:  <a href='https://github.com/w3c/csswg-drafts/issues/3567'>https://github.com/w3c/csswg-drafts/issues/3567</a></span>
+<span>Open</span></pre>
+<pre class=' a' id='issue-44'>
+<span>Issue 44. <a href='#issue-44'>#</a></span>
+<span>Summary:  Reference to flexible min track sizing functions, which don't exist</span>
+<span>From:     Oriol Brufau</span>
+<span>Comment:  <a href='https://github.com/w3c/csswg-drafts/issues/3568'>https://github.com/w3c/csswg-drafts/issues/3568</a></span>
+<span>Response: <a href='https://github.com/w3c/csswg-drafts/issues/3568#issuecomment-458746482'>https://github.com/w3c/csswg-drafts/issues/3568#issuecomment-458746482</a></span>
+<span class="a">Closed:   Accepted</span>
+<span>Resolved: Bugfix</span></pre>
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