[css-grid] Upgrade Grid to define baseline sets and last baselines

Author: fantasai

css-flexbox/Overview.bs

@@ -2220,8 +2220,9 @@ Flex Container Baselines</h3>
 	When <a href="https://www.w3.org/TR/CSS2/tables.html#height-layout">determining the baseline of a table cell</a>,
 	a flex container provides a baseline just as a line box or table-row does. [[!CSS21]]
 
-	See <a href="https://www.w3.org/TR/css3-align/#baseline-rules">Baseline Rules</a>
-	in [[CSS-ALIGN-3]] for more information on baseline alignment.
+	See [[css-writing-modes-3#intro-baselines]]
+	and [[css-align-3##baseline-rules]]
+	for more information on baselines.
 
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css-grid/Overview.bs

@@ -3344,34 +3344,40 @@ Aligning the Grid: the 'justify-content' and 'align-content' properties</h3>
 	Issue: Add example of fixed size spanner getting extra space from content-distribution.
 
 <h3 id='grid-baselines'>
-Grid Baselines</h3>
+Grid Container Baselines</h3>
 
-	The baselines of a <a>grid container</a> are determined as follows:
+	The first/last baselines of a <a>grid container</a> are determined as follows:
 
 	<ol>
 		<li>
-			If any of the <a>grid items</a> whose areas intersect the <a>grid container</a>’s first row/column
+			If any of the <a>grid items</a> whose areas intersect the <a>grid container</a>’s first/last row/column
 			<a href="#baseline-participation">participate in baseline alignment</a>,
-			the grid container's baseline is the baseline of those <a>grid items</a>.
+			the grid container's <a>baseline set</a> in that axis
+			is <a lt="generate baselines">generated</a> from
+			the shared <a>alignment baseline</a> of those <a>grid items</a>.
 
 		<li>
-			Otherwise, if the grid container has at least one <a>grid item</a> whose area intersects the first row/column,
-			and the first such <a>grid item</a> (in <a>order-modified grid order</a>) has a baseline
-			parallel to the relevant axis,
-			the grid container's baseline is that baseline.
+			Otherwise, if the grid container has at least one <a>grid item</a> whose area intersects the first/last row/column,
+			and the first/last such <a>grid item</a> (in <a>grid order</a>)
+			has a baseline set parallel to the relevant axis,
+			the grid container's first/last baseline set in that axis
+			is <a lt="generate baselines">generated</a> from
+			that <a>grid item</a>’s <a>alignment baseline</a>.
 
 		<li>
-			Otherwise, the grid container's baseline is <a href="https://www.w3.org/TR/css3-writing-modes/#inline-alignment">synthesized</a>
-			from the first item's (in <a>order-modified grid order</a>) content box,
+			Otherwise, the grid container's first/last baseline set
+			is <a lt="synthesize baselines">synthesized</a>
+			from the first/last item's (in <a>grid order</a>) content box,
 			or, failing that, from the grid container's content box.
 	</ol>
 
 	A <a>grid item</a> <dfn export id="baseline-participation">participates in baseline alignment</dfn> in a particular dimension
 	if its value for 'align-self' or 'justify-self', as appropriate, is ''baseline''
 	and its inline axis is parallel to that dimension.
 
-	<dfn export lt="order-modified grid order">'order'-modified grid order</dfn> is the order in which
-	<a>grid items</a> are encountered when traversing the grid's <a>grid cells</a>,
+	<dfn export lt="grid order|grid-modified document order">'grid-modified document order (grid order)</dfn>
+	is the order in which <a>grid items</a> are encountered
+	when traversing the grid's <a>grid cells</a>,
 	in row-major order if calculating the inline-axis baseline,
 	or in column-major order if calculating the block-axis baseline.
 	If two items are encountered at the same time,
@@ -3385,6 +3391,10 @@ Grid Baselines</h3>
 	When <a href="https://www.w3.org/TR/CSS21/tables.html#height-layout">determining the baseline of a table cell</a>,
 	a grid container provides a baseline just as a line box or table-row does. [[!CSS21]]
 
+	See [[css-writing-modes-3#intro-baselines]]
+	and [[css-align-3##baseline-rules]]
+	for more information on baselines.
+
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css-grid/issues-wd-20150917.bsi

@@ -311,8 +311,8 @@ Resolved: Bugfix
 Issue 37.
 Summary:  Define "last baseline" for grid contianer
 From:     Mats Palmgren
-Comment: 
-Open
+Comment:  https://lists.w3.org/Archives/Public/www-style/2016Mar/0079.html
+Closed:   Accepted
 Resolved: Bugfix
 ----
 Issue 38.

css-grid/issues-wd-20150917.html

@@ -340,12 +340,12 @@ <h1>CSS Grid Layout Level 1 Disposition of Comments for 2015-09-17 WD</h1>
 <span>Response: <a href='https://lists.w3.org/Archives/Public/www-style/2016Mar/0072.html'>https://lists.w3.org/Archives/Public/www-style/2016Mar/0072.html</a></span>
 <span class="a">Closed:   Accepted</span>
 <span>Resolved: Bugfix</span></pre>
-<pre class='open ' id='issue-37'>
+<pre class=' a' id='issue-37'>
 <span>Issue 37. <a href='#issue-37'>#</a></span>
 <span>Summary:  Define "last baseline" for grid contianer</span>
 <span>From:     Mats Palmgren</span>
-<span>Comment: </span>
-<span>Open</span>
+<span>Comment:  <a href='https://lists.w3.org/Archives/Public/www-style/2016Mar/0079.html'>https://lists.w3.org/Archives/Public/www-style/2016Mar/0079.html</a></span>
+<span class="a">Closed:   Accepted</span>
 <span>Resolved: Bugfix</span></pre>
 <pre class=' d' id='issue-38'>
 <span>Issue 38. <a href='#issue-38'>#</a></span>