[css2] Replaced autmatic algorithm with Doug Rand's

bert-github · bert-github · commit bb475baab39c · 1998-03-19T19:59:40.000Z
--HG--
extra : convert_revision : svn%3A73dc7c4b-06e6-40f3-b4f7-9ed1dbc14bfc/trunk%401267
diff --git a/css2/tables.src b/css2/tables.src
@@ -1,6 +1,6 @@
 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
 <html lang="en">
-<!-- $Id: tables.src,v 2.22 1998-03-17 08:04:47 ijacobs Exp $ -->
+<!-- $Id: tables.src,v 2.23 1998-03-19 19:59:40 bbos Exp $ -->
 <head>
 <meta http-equiv="Content-Type" content="text/html;charset=ISO-8859-1">
 <title>Tables</title>
@@ -797,43 +797,57 @@ determining the final layout.
 
 <p>For this algorithm, a value of 'auto' for the <span
 class="propinst-width">'width'</span> property for the table element
-means that the final table width is computed dynamically: is the sum
+means that the final table width is computed dynamically: it is the sum
 of the column widths and the borders between them.
 
 <p>Column widths are determined as follows:</p>
 
 <ol>
-<li>The width is given by the <span
-class="propinst-width">'width'</span> property for the column
-element.
-<li>However, if there is no column element, or its <span
-class="propinst-width">'width'</span> is 'auto', the
-width is given by the width requirements of the cells in the
-column.
-<li>If the value of <span class="propinst-width">'width'</span> for the
-first cell in the column is 'auto', the UA finds the "optimal" width
-of the column, based on some heuristics.
+<li>For each cell determine the minimum and maximum widths needed.
+Cells with a given 'width' get a minimum width equal to the greater of
+the specified width and the minimum needed width.
+
+<li>For each column determine a maximum and minimum width from the
+cells with a colspan of 1. If the column has a 'width' greater than
+the minimum over the cells, then the 'width' is used as the mimimum
+width for the column.
+
+<li>For each cell with a colspan of more than one, increase the
+minimum and maximum widths of the columns it spans enough so the
+combined minimum/maximum widths are at least those of the cell. If
+possible, widen all spanned columns by approximately the same amount.
 </ol>
 
-<p><p>A cell that spans columns provides a constraint on the sum of the
-widths of the columns it spans. The problem of finding
-the widths can be regarded as a constraint resolution system, that may
-be over- or under-constrained. </p>
+<p>Now we have a maximum and minimum width per column. We now
+determine final column widths. Cell spacing is appropriately added
+into these calculations.
+
+<p>If there is a table width given, and it is larger than the minimum
+width needed, use it, and distribute the width over the columns in
+some way.
+
+<p class="note">Note that a table may thus be wider than its 'width'
+property.
+
+<p>If the table width is 'auto', there are three cases:
+
+<ol>
+<li>If the maximum needed width for the table is less than the width
+of the table's containing block, use the maximum width.
+
+<li>If the minimum width needed is greater than the width of the
+containing block, use the minimum width.
+
+<li>Otherwise, use the width of the containing block and distribute
+the width over the columns in some way.
+</ol>
 
 <p>A percentage is relative to the table width. If the table's width
 is 'auto', a percentage represents a constraint on the column's width,
 which a UA should try to satisfy. (Obviously, this is not always
 possible: if the column's width is '110%', the constraint cannot be
 satisfied.)</p>
 
-<p>If a cell's content doesn't "fit" the width of the column, the
-<span class="propinst-overflow">'overflow'</span> property
-determines what happens to it.
-
-<p>If the sum of the columns is not equal to the table's width, the UA
-is free to discard or modify any or all of the width properties until
-they are the same.
-
 <div class="note">
 <P> <em><strong>Note.</strong> In this algorithm, rows (and row
 groups) and columns (and column groups) both constrain and are
