[css-values-3][css-values-4] Clarify that font-relative lengths are measured in absence of shaping. #5498

Author: fantasai

css-values-3/Overview.bs

@@ -1175,6 +1175,8 @@ Font-relative Lengths: the ''em'', ''ex'', ''ch'', ''rem'' units
 	(or the computed font metrics corresponding to the initial values of the 'font' property,
 	if the element has no parent).
 
+	The [=font-relative lengths=] are calculated in the absence of shaping.
+
@@ -1907,6 +1907,8 @@ Font-relative Lengths: the ''em'', ''rem'', ''ex'', ''rex'', ''cap'', ''rcap'',
@@ -1907,6 +1907,8 @@ Font-relative Lengths: the ''em'', ''rem'', ''ex'', ''rex'', ''cap'', ''rcap'',
 	Note: Font-relative units such as ''ch'' and ''ic'' can trigger font downloads,
 	if a required font is not yet loaded.
 
+	The [=font-relative lengths=] are calculated in the absence of shaping.
+
 	Some user-agents allow users to apply additional restrictions to font sizes in a document,
 	such as setting minimum font sizes to ensure readability.
 	Such restrictions must be applied to the [=used value=] of the affected properties only;
@@ -4945,14 +4947,15 @@ Recent Changes
 
 	(This is a subset of [[#additions-L3]].)
 
-	Substantial changes since
+	Substantial changes since 16 December 2021 WD:
 
 	
 		Switch censoring of ''NaN'' that escapes a [=math function=] from infinity to zero.
 			(Issue 7067)
 		Updated to match latest Fetch terminology.
 			(Fetch PR 1413,
 			 CSS PR 7160)
+			Clarified that the [=font-relative lenghts=] are calculated without text shaping.
 	
 
 	Substantial changes since 16 October 2021 WD:

@@ -1907,6 +1907,8 @@ Font-relative Lengths: the ''em'', ''rem'', ''ex'', ''rex'', ''cap'', ''rcap'',
 	Note: Font-relative units such as ''ch'' and ''ic'' can trigger font downloads,
 	if a required font is not yet loaded.
 
+	The [=font-relative lengths=] are calculated in the absence of shaping.
+
 	Some user-agents allow users to apply additional restrictions to font sizes in a document,
 	such as setting minimum font sizes to ensure readability.
 	Such restrictions must be applied to the [=used value=] of the affected properties only;
@@ -4945,14 +4947,15 @@ Recent Changes
 
 	(This is a subset of [[#additions-L3]].)
 
-	Substantial changes since
+	Substantial changes since 16 December 2021 WD:
 
 	
 		Switch censoring of ''NaN'' that escapes a [=math function=] from infinity to zero.
 			(Issue 7067)
 		Updated to match latest Fetch terminology.
 			(Fetch PR 1413,
 			 CSS PR 7160)
+			Clarified that the [=font-relative lenghts=] are calculated without text shaping.
 	
 
 	Substantial changes since 16 October 2021 WD: