/usr/share/php/dompdf/include/frame_tree.cls.php is in php-dompdf 0.6.2+dfsg-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 | <?php
/**
* @package dompdf
* @link http://dompdf.github.com/
* @author Benj Carson <benjcarson@digitaljunkies.ca>
* @license http://www.gnu.org/copyleft/lesser.html GNU Lesser General Public License
*/
/**
* Represents an entire document as a tree of frames
*
* The Frame_Tree consists of {@link Frame} objects each tied to specific
* DOMNode objects in a specific DomDocument. The Frame_Tree has the same
* structure as the DomDocument, but adds additional capabalities for
* styling and layout.
*
* @package dompdf
* @access protected
*/
class Frame_Tree {
/**
* Tags to ignore while parsing the tree
*
* @var array
*/
static protected $_HIDDEN_TAGS = array("area", "base", "basefont", "head", "style",
"meta", "title", "colgroup",
"noembed", "noscript", "param", "#comment");
/**
* The main DomDocument
*
* @see http://ca2.php.net/manual/en/ref.dom.php
* @var DomDocument
*/
protected $_dom;
/**
* The root node of the FrameTree.
*
* @var Frame
*/
protected $_root;
/**
* Subtrees of absolutely positioned elements
*
* @var array of Frames
*/
protected $_absolute_frames;
/**
* A mapping of {@link Frame} objects to DOMNode objects
*
* @var array
*/
protected $_registry;
/**
* Class constructor
*
* @param DomDocument $dom the main DomDocument object representing the current html document
*/
function __construct(DomDocument $dom) {
$this->_dom = $dom;
$this->_root = null;
$this->_registry = array();
}
function __destruct() {
clear_object($this);
}
/**
* Returns the DomDocument object representing the curent html document
*
* @return DOMDocument
*/
function get_dom() {
return $this->_dom;
}
/**
* Returns the root frame of the tree
*
* @return Page_Frame_Decorator
*/
function get_root() {
return $this->_root;
}
/**
* Returns a specific frame given its id
*
* @param string $id
* @return Frame
*/
function get_frame($id) {
return isset($this->_registry[$id]) ? $this->_registry[$id] : null;
}
/**
* Returns a post-order iterator for all frames in the tree
*
* @return FrameTreeList|Frame[]
*/
function get_frames() {
return new FrameTreeList($this->_root);
}
/**
* Builds the tree
*/
function build_tree() {
$html = $this->_dom->getElementsByTagName("html")->item(0);
if ( is_null($html) ) {
$html = $this->_dom->firstChild;
}
if ( is_null($html) ) {
throw new DOMPDF_Exception("Requested HTML document contains no data.");
}
$this->fix_tables();
$this->_root = $this->_build_tree_r($html);
}
/**
* Adds missing TBODYs around TR
*/
protected function fix_tables(){
$xp = new DOMXPath($this->_dom);
// Move table caption before the table
// FIXME find a better way to deal with it...
$captions = $xp->query("//table/caption");
foreach($captions as $caption) {
$table = $caption->parentNode;
$table->parentNode->insertBefore($caption, $table);
}
$rows = $xp->query("//table/tr");
foreach($rows as $row) {
$tbody = $this->_dom->createElement("tbody");
$tbody = $row->parentNode->insertBefore($tbody, $row);
$tbody->appendChild($row);
}
}
/**
* 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 $frame;
}
// Fixes 'cannot access undefined property for object with
// overloaded access', fix by Stefan radulian
// <stefan.radulian@symbion.at>
//foreach ($node->childNodes as $child) {
// Store the children in an array so that the tree can be modified
$children = array();
for ($i = 0; $i < $node->childNodes->length; $i++) {
$children[] = $node->childNodes->item($i);
}
foreach ($children as $child) {
$node_name = mb_strtolower($child->nodeName);
// Skip non-displaying nodes
if ( in_array($node_name, self::$_HIDDEN_TAGS) ) {
if ( $node_name !== "head" && $node_name !== "style" ) {
$child->parentNode->removeChild($child);
}
continue;
}
// Skip empty text nodes
if ( $node_name === "#text" && $child->nodeValue == "" ) {
$child->parentNode->removeChild($child);
continue;
}
// Skip empty image nodes
if ( $node_name === "img" && $child->getAttribute("src") == "" ) {
$child->parentNode->removeChild($child);
continue;
}
$frame->append_child($this->_build_tree_r($child), false);
}
return $frame;
}
public function insert_node(DOMNode $node, DOMNode $new_node, $pos) {
if ( $pos === "after" || !$node->firstChild ) {
$node->appendChild($new_node);
}
else {
$node->insertBefore($new_node, $node->firstChild);
}
$this->_build_tree_r($new_node);
$frame_id = $new_node->getAttribute("frame_id");
$frame = $this->get_frame($frame_id);
$parent_id = $node->getAttribute("frame_id");
$parent = $this->get_frame($parent_id);
if ( $parent ) {
if ( $pos === "before" ) {
$parent->prepend_child($frame, false);
}
else {
$parent->append_child($frame, false);
}
}
return $frame_id;
}
}
|