[css-writing-modes] Bring typographic mode back in preparation of sideways-lr|rl

Author: kojiishi

css-writing-modes/Overview.bs

@@ -101,6 +101,12 @@ Introduction to Writing Modes</h2>
     within a block container. The 'writing-mode' property determines the
     block flow direction.</p>
 
+  <p>The <dfn export>typographic mode</dfn> determines if text should apply
+    typographic conventions specific to vertical flow for <a>vertical
+    scripts</a>.
+    This concept distinguishes vertical flow for <a>vertical scripts</a> from
+    rotated horizontal flow.
+
   <p>A <dfn export>horizontal writing mode</dfn> is one with horizontal lines of
     text, i.e. a downward or upward block flow.
     A <dfn export>vertical writing mode</dfn> is one with vertical lines of text,
@@ -795,13 +801,13 @@ Block Flow Direction: the 'writing-mode' property</h3>
   <dl dfn-for=writing-mode dfn-type=value>
     <dt><dfn>horizontal-tb</dfn></dt>
     <dd>Top-to-bottom <i>block flow direction</i>.
-        The <i>writing mode</i> is horizontal.</dd>
+        Both the <i>writing mode</i> and <i>typographic mode</a> are horizontal.</dd>
     <dt><dfn>vertical-rl</dfn></dt>
     <dd>Right-to-left <i>block flow direction</i>.
-        The <i>writing mode</i> is vertical.</dd>
+        Both the <i>writing mode</i> and <i>typographic mode</a> are vertical.</dd>
     <dt><dfn>vertical-lr</dfn></dt>
     <dd>Left-to-right <i>block flow direction</i>.
-        The <i>writing mode</i> is vertical.</dd>
+        Both the <i>writing mode</i> and <i>typographic mode</a> are vertical.</dd>
   </dl>
 
   <p>The 'writing-mode' property specifies the <i>block flow direction</i>,
@@ -863,7 +869,7 @@ Block Flow Direction: the 'writing-mode' property</h3>
 
     <p><img alt="Screenshot of vertical layout: the input element is
                 laid lengthwise from top to bottom and its contents
-                rendered in a vertical writing mode, matching the
+                rendered in a vertical typographic mode, matching the
                 labels outside it. The drop-down selection control
                 after it slides out to the side (towards the after
                 edge of the block) rather than downward as it would
@@ -998,7 +1004,7 @@ Introduction to Baselines</h3>
 
   <p>Different baseline tables can be provided for alignment in
     horizontal and vertical text. UAs should use the vertical
-    tables in vertical writing modes and the horizontal tables
+    tables in vertical <i>typographic modes</i> and the horizontal tables
     otherwise.
 
 <h3 id="text-baselines">
@@ -1020,7 +1026,7 @@ Text Baselines</h3>
     </dd>
   </dl>
 
-  <p>In vertical writing mode, the <i>central baseline</i> is used as the
+  <p>In vertical <i>typographic mode</i>, the <i>central baseline</i> is used as the
     dominant baseline when 'text-orientation' is ''mixed'' or ''upright''.
     Otherwise the <i>alphabetic baseline</i> is used.
 
@@ -1048,7 +1054,7 @@ Atomic Inline Baselines</h3>
 Baseline Alignment</h3>
 
   <p>The <dfn>dominant baseline</dfn>
-    (which <a href="#text-baselines">can change</a> based on the writing mode)
+    (which <a href="#text-baselines">can change</a> based on the <i>typographic mode</i>)
     is used in CSS for alignment in two cases:
   <ul>
     <li><strong>Aligning glyphs from different fonts within the same inline box.</strong>
@@ -1185,8 +1191,9 @@ Orienting Text: the 'text-orientation' property</h3>
   </pre>
 
   <p>This property specifies the orientation of text
-    within a line. Current values only have an effect in vertical writing
-    modes; the property has no effect on boxes in horizontal writing modes.
+    within a line. Current values only have an effect in vertical <i>typographic
+    modes</i>;
+    the property has no effect on boxes in horizontal <i>typographic modes</i>.
 
   <p>For readability, the term <i>character</i> is used in place of
     <em>extended grapheme cluster</em> in this section.