function addHierIDs()
{
$this->hier_ids = array();
$this->first_row_ids = array();
$this->first_col_ids = array();
$this->list_item_ids = array();
$this->file_item_ids = array();
// set hierarchical ids for Paragraphs, Tables, TableRows and TableData elements
$xpc = xpath_new_context($this->dom);
//$path = "//Paragraph | //Table | //TableRow | //TableData";
$sep = $path = "";
foreach ($this->id_elements as $el) {
$path .= $sep . "//" . $el;
$sep = " | ";
}
$res =& xpath_eval($xpc, $path);
for ($i = 0; $i < count($res->nodeset); $i++) {
$cnode = $res->nodeset[$i];
$ctag = $cnode->node_name();
// get hierarchical id of previous sibling
$sib_hier_id = "";
while ($cnode =& $cnode->previous_sibling()) {
if ($cnode->node_type() == XML_ELEMENT_NODE && $cnode->has_attribute("HierId")) {
$sib_hier_id = $cnode->get_attribute("HierId");
//$sib_hier_id = $id_attr->value();
break;
}
}
if ($sib_hier_id != "") {
require_once "./Services/COPage/classes/class.ilPageContent.php";
$node_hier_id = ilPageContent::incEdId($sib_hier_id);
$res->nodeset[$i]->set_attribute("HierId", $node_hier_id);
$this->hier_ids[] = $node_hier_id;
if ($ctag == "TableData") {
if (substr($par_hier_id, strlen($par_hier_id) - 2) == "_1") {
$this->first_row_ids[] = $node_hier_id;
}
}
if ($ctag == "ListItem") {
$this->list_item_ids[] = $node_hier_id;
}
if ($ctag == "FileItem") {
$this->file_item_ids[] = $node_hier_id;
}
} else {
// get hierarchical id of next parent
$cnode = $res->nodeset[$i];
$par_hier_id = "";
while ($cnode =& $cnode->parent_node()) {
if ($cnode->node_type() == XML_ELEMENT_NODE && $cnode->has_attribute("HierId")) {
$par_hier_id = $cnode->get_attribute("HierId");
//$par_hier_id = $id_attr->value();
break;
}
}
//echo "<br>par:".$par_hier_id." ($ctag)";
if ($par_hier_id != "" && $par_hier_id != "pg") {
$node_hier_id = $par_hier_id . "_1";
$res->nodeset[$i]->set_attribute("HierId", $node_hier_id);
$this->hier_ids[] = $node_hier_id;
if ($ctag == "TableData") {
$this->first_col_ids[] = $node_hier_id;
if (substr($par_hier_id, strlen($par_hier_id) - 2) == "_1") {
$this->first_row_ids[] = $node_hier_id;
}
}
if ($ctag == "ListItem") {
$this->list_item_ids[] = $node_hier_id;
}
if ($ctag == "FileItem") {
$this->file_item_ids[] = $node_hier_id;
}
} else {
$node_hier_id = "1";
$res->nodeset[$i]->set_attribute("HierId", $node_hier_id);
$this->hier_ids[] = $node_hier_id;
}
}
}
// set special hierarchical id "pg" for pageobject
$xpc = xpath_new_context($this->dom);
$path = "//PageObject";
$res =& xpath_eval($xpc, $path);
for ($i = 0; $i < count($res->nodeset); $i++) {
$res->nodeset[$i]->set_attribute("HierId", "pg");
$this->hier_ids[] = "pg";
}
unset($xpc);
}
