[css-tables] updated table-layout:fixed behavior

Author: FremyCompany

css-tables-3/Overview.bs

@@ -769,7 +769,9 @@ spec:css21; type:property; text:max-width
 				are merged into one single track
 				for the purpose of computing the layout of the table
 				if except the first of such sequence of tracks
-					there is no table-column/table-row element defining them explicitely.
+					there is no table-column/table-row element defining them explicitely;
+				if 'table-layout' computes to 'fixed' on the table-root,
+					columns are however never merged together.
 			Change the spanning of the cells contained in those tracks
 				accordingly so that no difference is shown.
 			<span class="hint">(see <a href="#spanning-ghost-rows">spanning-ghost-rows test cases</a>)</span>
@@ -853,11 +855,19 @@ spec:css21; type:property; text:max-width
 				Applies To: table-root elements.
 				Inherited: yes
 			</pre>
+			
+			<p class="advisement">
+				The computed value of the 'table-layout' property is equal to its specified value,
+					except if the specified width of the table root is not a &lt;length-percentage&gt;
+					in this case, the computed value of the property is always <code>auto</code>.
 
 			<p>
-				When the 'table-layout' property has <code>fixed</code> as its value,
-				the aggregation algorithm for column sizing is not applied,
-				and the values determined for the first row of the table are used instead
+				When the 'table-layout' property computes to <code>fixed</code>,
+				the content of the table-cells is ignored for the purpose of width computation
+				the aggregation algorithm for column sizing is not applied beyond the first row,
+				and the values explicitely specified for the table-columns and the first row of the table are used instead;
+				columns with undefinite widths are attributed their fair share of the remaining space
+				after the columns with a definite width have been considered, or 0px if there is no remaining space
 				(see [[#computing-column-measures]]).
 
 		<!--------------------------------------------------------------------------------->
@@ -1476,10 +1486,14 @@ spec:css21; type:property; text:max-width
 					computing the column widths of a table.
 
 			<p class="advisement">
-				For the purpose of measuring a column, if 'table-layout' is "fixed", 
+				For the purpose of measuring a column, if 'table-layout' computes to fixed, 
 					only cells which originate in the first row of the table
 					(after reordering the header and footer) 
-					will be considered, even if not mentioned explicitely.
+					will be considered, if any.
+				In addition, the min-content and max-content width of cells 
+					is considered zero unless they are directly specified
+					as a length-percentage, in which case they are resolved
+					based on the table width (which must be definite as a result).
 
 			<dl>
 				<!--------------------------------------------------------------------------------->
@@ -1489,7 +1503,8 @@ spec:css21; type:property; text:max-width
 						<li>the outer min-content width of the column group, if any
 						<li>the outer min-content width of the column, if any
 						<li>the outer min-content width of each cell in the column whose column-span is 1
-							(or just the one in the first row if 'table-layout' is "fixed") or 0 if there is none
+							(or just the one in the first row if 'table-layout' is "fixed") 
+							or 0 if there is none
 					</ul>
 
 				<!--------------------------------------------------------------------------------->