[css-align] Defer fallback alignments for <content-distribution> to L4. #1002

Author: fantasai

css-align/Overview.bs

@@ -420,8 +420,8 @@ Distributed Alignment: the ''<content-distribution>/stretch'', ''space-between''
 
 	When space cannot be distributed in this way,
 	these values behave as their <a>fallback alignment</a>.
-	Each distribution value has a default <a>fallback alignment</a>,
-	but one can alternatively be specified explicitly in the property.
+	Each distribution value an associated default <a>fallback alignment</a>.
+	(A future level of this module may allow the <a>fallback alignment</a> to be specified explicitly.)
 
 	<dl dfn-type="value" dfn-for="align-content, justify-content, <content-distribution>">
 		<dt><dfn>space-between</dfn>
@@ -614,7 +614,7 @@ Content Distribution: the 'align-content' and 'justify-content' properties and '
 
 	<pre class="propdef">
 	Name: align-content
-	Value: normal | <<baseline-position>> |  <<content-distribution>> || [ <<overflow-position>>? && <<content-position>> ]
+	Value: normal | <<baseline-position>> |  <<content-distribution>> | [ <<overflow-position>>? && <<content-position>> ]
 	Initial: normal
 	Applies to: block containers, flex containers, and grid containers
 	Inherited: no
@@ -626,7 +626,7 @@ Content Distribution: the 'align-content' and 'justify-content' properties and '
 
 	<pre class="propdef">
 	Name: justify-content
-	Value: normal | <<content-distribution>> || [ <<overflow-position>>? && <<content-position>> ]
+	Value: normal | <<content-distribution>> | [ <<overflow-position>>? && <<content-position>> ]
 	Initial: normal
 	Applies to: block containers, flex containers, and grid containers
 	Inherited: no
@@ -638,8 +638,6 @@ Content Distribution: the 'align-content' and 'justify-content' properties and '
 
 	Aligns the contents of the box as a whole.
 	Values other than <dfn value for="justify-content, align-content">normal</dfn> are defined in [[#alignment-values]], above.
-	If both a <<content-distribution>> and <<content-position>> are given,
-	the <<content-position>> provides an explicit <a>fallback alignment</a>.
 
 	<pre class="propdef">
 	Name: place-content
@@ -679,7 +677,7 @@ Details per Layout Mode {#distribution-details}
 			<td>
 				The <a>block axis</a>.
 				If a <<content-distribution>> is specified
-				the <a>fallback alignment</a> is used instead.
+				its <a>fallback alignment</a> is used instead.
 		<tr>
 			<th>'justify-content' Axis
 			<td>
@@ -715,7 +713,7 @@ Details per Layout Mode {#distribution-details}
 			<td>
 				The <a>block axis</a>.
 				If a <<content-distribution>> is specified
-				the <a>fallback alignment</a> is used instead.
+				its <a>fallback alignment</a> is used instead.
 		<tr>
 			<th>'justify-content' Axis
 			<td>
@@ -758,8 +756,7 @@ Details per Layout Mode {#distribution-details}
 			<td>
 				The 'justify-content' property applies along the <a>main axis</a>,
 				but since stretching in the <a>main axis</a> is controlled by 'flex',
-				''<content-distribution>/stretch'' behaves as ''flex-start''
-				(ignoring the specified <a>fallback alignment</a>, if any).
+				''<content-distribution>/stretch'' behaves as ''flex-start''.
 		<tr>
 			<th>''justify-content/normal'' Behavior
 			<td>
@@ -943,9 +940,6 @@ Inline/Main-Axis Alignment: the 'justify-self' property</h3>
 			while still respecting the constraints imposed by 'min-height'/'min-width'/'max-height'/'max-width'.
 			Unless otherwise specified, this value falls back to ''flex-start''.
 
-			Issue: Should ''justify-self/stretch'' allow a fallback alignment,
-			like it does on 'align-content' and 'justify-content'?
-
 			Note: The ''justify-self/stretch'' keyword can cause elements to shrink,
 			to fit their container.
 
@@ -1707,6 +1701,8 @@ Changes</h2>
 			(<a href="https://github.com/w3c/csswg-drafts/issues/1167">Issue 1167</a>)
 		<li>Dropped <<baseline-position>> value of 'justify-content' since it can't do anything anyway.
 			(<a href="https://github.com/w3c/csswg-drafts/issues/1184">Issue 1184</a>)
+		<li>Deferred ability to specify fallback alignments to Level 4.
+			(<a href="https://github.com/w3c/csswg-drafts/issues/1002#issuecomment-295143297">Issue 1002</a>)
 	</ul>
 
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