[css-sizing] Make block dimension behave like auto for all -content k…

…eywords, per WG resolution.

css-sizing-3/Overview.bs

@@ -267,27 +267,32 @@ New Keywords for 'width' and 'height'</h3>
 
 		<dt><dfn>max-content</dfn>
 		<dd>
-			Use the <a>max-content inline size</a> or <a>max-content block size</a>,
-			as appropriate to the writing mode.
+			If specified for the inline axis,
+			use the <a>max-content inline size</a>;
+			otherwise compute to ''width/auto''.
 
 		<dt><dfn>min-content</dfn>
 		<dd>
-			Use the <a>min-content inline size</a> or <a>min-content block size</a>,
-			as appropriate to the writing mode.
+			If specified for the inline axis,
+			use the <a>min-content inline size</a>;
+			otherwise compute to ''width/auto''.
 
 		<dt><dfn>fit-content</dfn>
 		<dd>
-			Use the <a>fit-content inline size</a> or <a>fit-content block size</a>,
-			as appropriate to the writing mode,
+			If specified for the inline axis,
+			use the <a>max-content inline size</a>
 			i.e.
-			<code>min(<a>max-content size</a>, max(<a>min-content size</a>, <a>fill-available size</a>))</code>
+			<code>min(<a>max-content size</a>, max(<a>min-content size</a>, <a>fill-available size</a>))</code>;
+			otherwise compute to ''width/auto''.
 
 		<dt><dfn>fit-content(<<length-percentage>>)</dfn>
 		<dd>
-			Use the fit-content formula
+			If specified for the inline axis,
+			use the fit-content formula
 			with the <a>available space</a> replaced by the specified argument,
 			i.e.
-			<code>min(<a>max-content size</a>, max(<a>min-content size</a>, <<length-percentage>>))</code>
+			<code>min(<a>max-content size</a>, max(<a>min-content size</a>, <<length-percentage>>))</code>;
+			otherwise compute to ''width/auto''.
 	</dl>
 
 	Issue: Is ''width/stretch'' stable enough or should we defer to L4?
@@ -298,15 +303,6 @@ New Keywords for 'width' and 'height'</h3>
 	this is true automatically.
 	For Block layout, this means using ''display: flow-root;''.
 
-	<p class="issue">
-		Right now all of these except ''width/fill'' mean the same thing
-		for block-sizes. This may or may not be ideal.
-
-	<p class='issue'>
-		If the inline-size is ''width/auto'',
-		we could have min-content block-size imply a max-content inline-size,
-		and vice versa.
-
 	<p class='note'>
 		Note that percentages resolved against the intrinsic sizes
 		(''width/max-content'', ''width/min-content'', ''width/fit-content'')
@@ -354,10 +350,8 @@ Column Sizing Keywords</h3>
 		<dd>
 			Specifies the optimal column width as
 			<code>min(<a>max-content size</a>, max(<a>min-content size</a>, <<length-percentage>>))</code>
-
 	</dl>
 
-
 <h2 id='intrinsic'>
 Intrinsic Size Determination</h2>
 

css-sizing/Overview.bs

@@ -265,31 +265,34 @@ New Keywords for 'width' and 'height'</h3>
 			It allows re-using this formula for boxes that are otherwise shrink-wrapped,
 			like tables.
 
-			Issue: The working group agreed to rename this to <dfn>stretch</dfn> on 2017-01-13.
-
 		<dt><dfn>max-content</dfn>
 		<dd>
-			Use the <a>max-content inline size</a> or <a>max-content block size</a>,
-			as appropriate to the writing mode.
+			If specified for the inline axis,
+			use the <a>max-content inline size</a>;
+			otherwise compute to ''width/auto''.
 
 		<dt><dfn>min-content</dfn>
 		<dd>
-			Use the <a>min-content inline size</a> or <a>min-content block size</a>,
-			as appropriate to the writing mode.
+			If specified for the inline axis,
+			use the <a>min-content inline size</a>;
+			otherwise compute to ''width/auto''.
 
 		<dt><dfn>fit-content</dfn>
 		<dd>
-			Use the <a>fit-content inline size</a> or <a>fit-content block size</a>,
-			as appropriate to the writing mode,
+			If specified for the inline axis,
+			use the <a>max-content inline size</a>
 			i.e.
-			<code>min(<a>max-content size</a>, max(<a>min-content size</a>, <a>fill-available size</a>))</code>
+			<code>min(<a>max-content size</a>, max(<a>min-content size</a>, <a>fill-available size</a>))</code>;
+			otherwise compute to ''width/auto''.
 
 		<dt><dfn>fit-content(<<length-percentage>>)</dfn>
 		<dd>
-			Use the fit-content formula
+			If specified for the inline axis,
+			use the fit-content formula
 			with the <a>available space</a> replaced by the specified argument,
 			i.e.
-			<code>min(<a>max-content size</a>, max(<a>min-content size</a>, <<length-percentage>>))</code>
+			<code>min(<a>max-content size</a>, max(<a>min-content size</a>, <<length-percentage>>))</code>;
+			otherwise compute to ''width/auto''.
 	</dl>
 
 	Note: To size an element such that it avoids overlapping sibling floats,
@@ -298,15 +301,6 @@ New Keywords for 'width' and 'height'</h3>
 	this is true automatically.
 	For Block layout, this means using ''display: flow-root;''.
 
-	<p class="issue">
-		Right now all of these except ''width/stretch'' mean the same thing
-		for block-sizes. This may or may not be ideal.
-
-	<p class='issue'>
-		If the inline-size is ''width/auto'',
-		we could have min-content block-size imply a max-content inline-size,
-		and vice versa.
-
 	<p class='note'>
 		Note that percentages resolved against the intrinsic sizes
 		(''width/max-content'', ''width/min-content'', ''width/fit-content'')
@@ -354,10 +348,8 @@ Column Sizing Keywords</h3>
 		<dd>
 			Specifies the optimal column width as
 			<code>min(<a>max-content size</a>, max(<a>min-content size</a>, <<length-percentage>>))</code>
-
 	</dl>
 
-
 <h2 id='intrinsic'>
 Intrinsic Size Determination</h2>