[css2] Issue 156

bert-github · bert-github · commit 7f23c8b6ff63 · 2010-10-13T15:39:24.000Z
from http://wiki.csswg.org/spec/css2.1 --HG-- extra : convert_revision : svn%3A73dc7c4b-06e6-40f3-b4f7-9ed1dbc14bfc/trunk%403048
diff --git a/css2/fonts.src b/css2/fonts.src
@@ -1,6 +1,6 @@
 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN">
 <html lang="en">
-<!-- $Id: fonts.src,v 2.101 2010-08-26 16:44:25 bbos Exp $ -->
+<!-- $Id: fonts.src,v 2.102 2010-10-13 15:39:24 bbos Exp $ -->
 <head>
 <title>Fonts</title>
 <meta name="editor" lang="tr" content="Tantek &Ccedil;elik">
@@ -461,31 +461,41 @@ scale in which the value '400' (or 'normal') corresponds to the
 that face will typically be <em>Book, Regular, Roman, Normal</em> or
 sometimes <em>Medium</em>.
 </p>
+
 <p>The association of other weights within a family to the numerical
 weight values is intended only to preserve the ordering of darkness
 within that family. However, the following heuristics tell how the
-assignment is done in typical cases:
-</p>
+assignment is done in this case:
+
 <ul>
 <li>If the font family already uses a numerical scale with nine values
 (like e.g., <em>OpenType</em> does), the font weights should be mapped
 directly.
-</li>
+
 <li>If there is both a face labeled <em>Medium</em> and one labeled
 <em>Book, Regular, Roman</em> or <em>Normal,</em> then the
 <em>Medium</em> is normally assigned to the '500'.
-</li>
+
 <li>The font labeled "Bold" will often correspond to the weight value '700'.
-</li>
-<li>If there are fewer then 9 weights in the family, the default
-algorithm for filling the "holes" is as follows. If '500' is
-unassigned, it will be assigned the same font as '400'. If any of the
-values '600', '700', '800' or '900' remains unassigned, they are
-assigned to the same face as the next darker assigned keyword, if any,
-or the next lighter one otherwise. If any of '300', '200' or '100'
-remains unassigned, it is assigned to the next lighter assigned
-keyword, if any, or the next darker otherwise.
-</li>
+</ul>
+
+<p>Once the font family's weights are mapped onto the CSS scale,
+missing weights are selected as follows:
+
+<ul>
+<li>If the desired weight is less than 400, weights below the desired
+weight are checked in descending order followed by weights above the
+desired weight in ascending order until a match is found.
+
+<li>If the desired weight is greater than 500, weights above desired
+weight are checked in ascending order followed by weights below the
+desired weight in descending order until a match is found.
+
+<li>If the desired weight is 400, 500 is checked first and then the
+rule for desired weights less than 400 is used.
+
+<li>If the desired weight is 500, 400 is checked first and then the
+rule for desired weights less than 400 is used.
 </ul>
 
 <p>The following two examples show typical mappings.</p>
