[css-text-decor-4] text-decoration-skip-ink

Summarised the discussions and the resolution from telcon on Feb 2017:
https://lists.w3.org/Archives/Public/www-style/2017Feb/0069.html

Author: kojiishi

css-text-decor-4/Overview.bs

@@ -10,7 +10,7 @@ ED: https://drafts.csswg.org/css-text-decor-4/
 TR: https://www.w3.org/TR/css-text-decor-4/
 Issue Tracking: Tracker http://www.w3.org/Style/CSS/Tracker/products/10
 Editor: Elika J. Etemad / fantasai, Invited Expert, http://fantasai.inkedblade.net/contact, w3cid 35400
-Editor: Koji Ishii, Invited Expert, kojiishi@gluesoft.co.jp
+Editor: Koji Ishii, Google, kojiishi@gmail.com
 Abstract: This module contains the features of CSS relating to text decoration, such as underlines, text shadows, and emphasis marks.
 Link Defaults: css-color-3 (property) color, css-break-3 (dfn) fragment
 Ignored Terms: svg shape, svg shapes, invalid, repeatable list, simple list, valid image
@@ -232,12 +232,15 @@ Text Underline Offset: the 'text-underline-offset' property</h3>
 	''spelling-error'' or ''grammar-error'',
 	the UA may ignore the value of 'text-underline-position'.
 
-<h3 id="text-decoration-skip-property">
-Text Decoration Line Continuity: the 'text-decoration-skip' property</h3>
+<h3>
+Text Decoration Line Continuity</h3>
+
+<h4 id="text-decoration-skip-property">
+Text Decoration Line Continuity: the 'text-decoration-skip' property</h4>
 
 	<pre class="propdef">
 			Name: text-decoration-skip
-			Value: ''none'' | [ ''objects'' || [ ''spaces'' | [ ''leading-spaces'' || ''trailing-spaces'' ] ] || ''ink'' || ''edges'' || ''box-decoration'' ]
+			Value: ''none'' | [ ''objects'' || [ ''spaces'' | [ ''leading-spaces'' || ''trailing-spaces'' ] ] || ''edges'' || ''box-decoration'' ]
 			Initial: objects leading-spaces trailing-spaces
 			Applies to: all elements
 			Inherited: yes
@@ -274,24 +277,6 @@ Text Decoration Line Continuity: the 'text-decoration-skip' property</h3>
 			Skip all spacing, i.e. all <i>characters</i> with the Unicode White_Space property [[UAX44]],
 			plus any adjacent 'letter-spacing' or 'word-spacing'.
 
-		<dt><dfn value for="text-decoration-skip">ink</dfn></dt>
-		<dd>
-			Skip over where glyphs are drawn:
-			interrupt the decoration line to let the shape of the text show through
-			where the text decoration would otherwise cross over a glyph.
-			The UA must also skip a small distance to either side of the glyph outline.
-
-			<div class="figure">
-				<p><img title="text-decoration-skip: ink"
-						alt="An alphabetic underline through Myanmar text skips around descenders and the vertical strokes of combining characters that drop below the alphabetic baseline."
-						src="decoration-skip-ink.png"
-						>
-				<p class="caption">''text-decoration-skip: ink''</p>
-			</div>
-
-			This value only applies to overlines and underlines;
-			line-throughs are unaffected.
-
 		<dt><dfn value for="text-decoration-skip">edges</dfn></dt>
 		<dd>
 			The UA should place the start and end of the line inwards slightly
@@ -344,6 +329,61 @@ Text Decoration Line Continuity: the 'text-decoration-skip' property</h3>
 	''spelling-error'' or ''grammar-error'',
 	the UA may ignore the value of 'text-decoration-skip'.
 
+<h4 id="text-decoration-skip-ink-property">
+Text Decoration Line Continuity: the 'text-decoration-skip-ink' property</h4>
+
+	<pre class="propdef">
+			Name: text-decoration-skip-ink
+			Value: ''auto'' | ''none''
+			Initial: 'auto'
+			Applies to: all elements
+			Inherited: yes
+			Percentages: N/A
+			Media: visual
+			Computed value: as specified
+			Animatable: no
+	</pre>
+
+	This property controls how overlines and underlines are drawn
+	when they cross over a glyph.
+
+	When enabled, decoration lines skip over where glyphs are drawn:
+	interrupt the decoration line to let the shape of the text show through
+	where the text decoration would otherwise cross over a glyph.
+	The UA must also skip a small distance to either side of the glyph outline.
+
+	<div class="figure">
+		<p><img title="text-decoration-skip: ink"
+				alt="An alphabetic underline through Myanmar text skips around descenders and the vertical strokes of combining characters that drop below the alphabetic baseline."
+				src="decoration-skip-ink.png"
+				>
+		<p class="caption">''text-decoration-skip: ink''</p>
+	</div>
+
+	<div class="issue">
+		Ideographic scripts do not want to skip when 'auto'.
+		How can we define this behavior?
+		Are there more scripts wanting not to skip?
+		Need some normative text describe how 'auto' works.
+		<a href="https://lists.w3.org/Archives/Public/www-style/2017Feb/0069.html">telcon minutes</a>,
+		<a href="https://github.com/w3c/alreq/issues/86">alreq#86</a>
+	</div>
+
+	This property only applies to overlines and underlines;
+	line-throughs are unaffected.
+
+	<dl>
+		<dt><dfn value for="text-decoration-skip-ink">auto</dfn></dt>
+		<dd>
+			UA should skip over where glyphs are drawn.
+
+		<dt><dfn value for="text-decoration-skip-ink">none</dfn></dt>
+		<dd>
+			UA must draw contiguous lines without interruptions,
+			even when they cross over a glyph.
+
+	</dl>
+
 <h2 id=temp>Rescued L3 Brainstorming: Ignore For Now</h2>
 
 <h3 id="text-emphasis-skip">