[css-grid-1] Floor intrinsic track size calculations at zero. w3c#2655

fantasai · fantasai · commit 75c72c5a919a · 2018-06-11T20:07:36.000-07:00
diff --git a/css-grid-1/Overview.bs b/css-grid-1/Overview.bs
@@ -3850,13 +3850,15 @@ Resolve Intrinsic Track Sizes</h3>
 				<dd>
 					If the track has a ''min-content'' <a>min track sizing function</a>,
 					set its <a>base size</a>
-					to the maximum of the items’ <a>min-content contributions</a>.
+					to the maximum of the items’ <a>min-content contributions</a>,
+					floored at zero.
 
 				<dt>For max-content minimums:
 				<dd>
 					If the track has a ''max-content'' <a>min track sizing function</a>,
 					set its <a>base size</a>
-					to the maximum of the items’ <a>max-content contributions</a>.
+					to the maximum of the items’ <a>max-content contributions</a>,
+					floored at zero.
 
 				<dt>For auto minimums:
 				<dd>
@@ -3868,7 +3870,8 @@ Resolve Intrinsic Track Sizes</h3>
 
 					Otherwise,
 					set its <a>base size</a>
-					to the maximum of its items’ <a>min-size contributions</a>.
+					to the maximum of its items’ <a>min-size contributions</a>,
+					floored at zero.
 					The <dfn noexport>min-size contribution</dfn> of an item is
 					the outer size that would result from assuming
 					the item’s used 'min-width' or 'min-height' value
