static function optimize( $useComments, &$php, $tpl, &$tree, &$resourceData )
{
/* If for some reason we don't have elements, simply return */
if (! is_array( $tree[1] ) )
return;
$addNodeInit = false;
/* Loop through the children of the root */
foreach ( $tree[1] as $key => $kiddie )
{
/* Analyse per node type */
switch ( $kiddie[0] )
{
case eZTemplate::NODE_INTERNAL_OUTPUT_SPACING_INCREASE:
case eZTemplate::NODE_INTERNAL_SPACING_DECREASE:
/* Removing unnecessary whitespace changes */
unset( $tree[1][$key] );
break;
case 3: /* Variable */
if ( isset( $tree[1][$key + 1] ) and
( $tree[1][$key + 1][0] == eZTemplate::NODE_INTERNAL_RESOURCE_ACQUISITION ) and
isset( $resourceData['class-info'] ) )
{
$ret = eZTemplateOptimizer::optimizeResourceAcquisition(
$useComments, $php, $tpl,
$tree[1][$key], $tree[1][$key + 1], $resourceData );
/* We only unset the tree node when the optimization
* function returns false, as that means that the
* optimization could not be made. */
if ($ret)
{
unset( $tree[1][$key] );
}
}
else
{
$ret = eZTemplateOptimizer::optimizeVariable( $useComments, $php, $tpl, $tree[1][$key][2], $resourceData );
if ( $ret & 1 )
$addNodeInit = true;
}
break;
}
}
if ( $addNodeInit )
{
$initializer = array( eZTemplate::NODE_OPTIMIZED_INIT, null, false );
array_unshift( $tree[1], $initializer );
}
}
