[css-grid] Define computed value of grid-template-columns/rows better. #3154

tabatkins · tabatkins · commit 63a1d65afa59 · 2018-10-08T15:43:54.000-07:00
diff --git a/css-grid-1/Overview.bs b/css-grid-1/Overview.bs
@@ -1368,7 +1368,7 @@ Explicit Track Sizing: the 'grid-template-rows' and 'grid-template-columns' prop
 	Applies to: <a>grid containers</a>
 	Inherited: no
 	Percentages: refer to corresponding dimension of the content area
-	Computed value: the keyword ''grid-template-columns/none'' or a list, alternating each item  as either a (potentially empty) list of identifiers or a ''minmax()'' or ''repeat()'' notation, representing each <<track-size>> as a ''minmax()'' notation with each <<length-percentage>> computed
+	Computed value: the keyword ''grid-template-columns/none'' or a [=computed track list=]
 	Animation type: by computed value type
 	</pre>
 
@@ -1787,6 +1787,33 @@ Flexible Lengths: the ''fr'' unit</h4>
 	(nor are they compatible with <<length>>s, like some <<percentage>> values),
 	so they cannot be represented in or combined with other unit types in ''calc()'' expressions.
 
+<!--
+ ██████   ███████  ██     ██ ████████  ██     ██ ████████ ████████ ████████ 
+██    ██ ██     ██ ███   ███ ██     ██ ██     ██    ██    ██       ██     ██
+██       ██     ██ ████ ████ ██     ██ ██     ██    ██    ██       ██     ██
+██       ██     ██ ██ ███ ██ ████████  ██     ██    ██    ██████   ██     ██
+██       ██     ██ ██     ██ ██        ██     ██    ██    ██       ██     ██
+██    ██ ██     ██ ██     ██ ██        ██     ██    ██    ██       ██     ██
+ ██████   ███████  ██     ██ ██         ███████     ██    ████████ ████████ 
+-->
+
+<h4 id='computed-track-list'>
+Computed Values</h4>
+
+	A <dfn>computed track list</dfn> is a [=list=]
+	alternating between [=line name sets=] and [=track sections=],
+	with the first and last items being [=line name sets=].
+
+	A <dfn>line name set</dfn> is a (potentially empty) [=set=] of identifiers representing line names.
+
+	A <dfn>track section</dfn> is either:
+
+	* a ''minmax()'' functional notation representing a single track's size,
+		with each <<length-percentage>> computed
+	* a ''repeat()'' functional notation representing a repeated track list section,
+		with its <<integer>> computed
+		and its <<track-list>> represented as a [=computed track list=]
+
 <!--
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 ██     ██ ██       ██    ██ ██     ██ ██       ██     ██ ██       ██     ██
