function get_pages_traverse(&$box, $penalty)
{
if (!is_a($box, 'GenericContainerBox')) {
return array();
}
$locations = array();
for ($i = 0, $content_size = count($box->content); $i < $content_size; $i++) {
$previous_child =& PageBreakLocator::get_previous($i, $box->content, $content_size);
$next_child =& PageBreakLocator::get_next($i, $box->content, $content_size);
$child =& $box->content[$i];
/**
* Note that page-break-xxx properties apply to block-level elements only
*/
if (is_a($child, 'BRBox')) {
// Do nothing
} elseif ($child->isBlockLevel()) {
$locations = array_merge($locations, PageBreakLocator::get_pages_traverse_block($child, $next_child, $previous_child, $penalty));
} elseif (is_a($child, 'TableCellBox')) {
$null = null;
$child_locations = PageBreakLocator::get_pages_traverse_block($child, $null, $null, $penalty);
$locations = array_merge($locations, $child_locations);
} elseif (is_a($child, 'InlineBox')) {
$more_before = 0;
$more_after = 0;
if (is_a($previous_child, 'BRBox')) {
$more_before = PageBreakLocator::get_more_before($i, $box->content, $content_size);
}
if (is_a($next_child, 'BRBox')) {
$more_after = PageBreakLocator::get_more_after($i, $box->content, $content_size);
}
$locations = array_merge($locations, PageBreakLocator::get_pages_traverse_inline($child, $penalty, $more_before, $more_after));
} elseif (is_a($child, 'TableRowBox')) {
$locations = array_merge($locations, PageBreakLocator::get_pages_traverse_table_row($child, $penalty));
}
}
return $locations;
}