/**
* Recursively adds {@link Frame} objects to the tree
*
* Recursively build a tree of Frame objects based on a dom tree.
* No layout information is calculated at this time, although the
* tree may be adjusted (i.e. nodes and frames for generated content
* and images may be created).
*
* @param DOMNode $node the current DOMNode being considered
*
* @return Frame
*/
protected function _build_tree_r(DOMNode $node)
{
$frame = new Frame($node);
$id = $frame->get_id();
$this->_registry[$id] = $frame;
if (!$node->hasChildNodes()) {
return $frame;
}
for ($i = 0; $i < $node->childNodes->length; $i++) {
$child = $node->childNodes->item($i);
if (in_array($child->nodeName, self::$HIDDEN_TAGS)) {
if ($child->nodeName !== "head" && $child->nodeName !== "HEAD" && ($child->nodeName !== "style" && $child->nodeName !== "STYLE")) {
$child->parentNode->removeChild($child);
}
} elseif (($child->nodeName === "#text" || $child->nodeName === "#TEXT") && $child->nodeValue == "") {
$child->parentNode->removeChild($child);
} elseif (($child->nodeName === "img" || $child->nodeName === "IMG") && $child->getAttribute("src") == "") {
$child->parentNode->removeChild($child);
} elseif (is_object($child)) {
$frame->append_child($this->_build_tree_r($child), false);
}
}
return $frame;
}
function get_id()
{
return $this->_frame->get_id();
}
/**
* Update a row group after rows have been removed
*
* @param Frame $group The group to update
* @param Frame $last_row The last row in the row group
*/
public function update_row_group(Frame $group, Frame $last_row)
{
$g_key = $group->get_id();
$r_key = $last_row->get_id();
$r_rows = $this->_frames[$r_key]["rows"];
$this->_frames[$g_key]["rows"] = range($this->_frames[$g_key]["rows"][0], end($r_rows));
}
/**
* Recursively adds {@link Frame} objects to the tree
*
* Recursively build a tree of Frame objects based on a dom tree.
* No layout information is calculated at this time, although the
* tree may be adjusted (i.e. nodes and frames for generated content
* and images may be created).
*
* @param DOMNode $node the current DOMNode being considered
*
* @return Frame
*/
protected function _build_tree_r(DOMNode $node)
{
$frame = new Frame($node);
$id = $frame->get_id();
$this->_registry[$id] = $frame;
if (!$node->hasChildNodes()) {
return $frame;
}
// Store the children in an array so that the tree can be modified
$children = array();
$length = $node->childNodes->length;
for ($i = 0; $i < $length; $i++) {
$children[] = $node->childNodes->item($i);
}
$index = 0;
// INFO: We don't advance $index if a node is removed to avoid skipping nodes
while ($index < count($children)) {
$child = $children[$index];
$nodeName = strtolower($child->nodeName);
// Skip non-displaying nodes
if (in_array($nodeName, self::$HIDDEN_TAGS)) {
if ($nodeName !== "head" && $nodeName !== "style") {
$this->_remove_node($node, $children, $index);
} else {
$index++;
}
continue;
}
// Skip empty text nodes
if ($nodeName === "#text" && $child->nodeValue === "") {
$this->_remove_node($node, $children, $index);
continue;
}
// Skip empty image nodes
if ($nodeName === "img" && $child->getAttribute("src") === "") {
$this->_remove_node($node, $children, $index);
continue;
}
if (is_object($child)) {
$frame->append_child($this->_build_tree_r($child), false);
}
$index++;
}
return $frame;
}
