Primer commit del sistema avantika sin cambios
This commit is contained in:
990
pdf/include/frame.cls.php
Executable file
990
pdf/include/frame.cls.php
Executable file
@@ -0,0 +1,990 @@
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<?php
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/**
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* DOMPDF - PHP5 HTML to PDF renderer
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*
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* File: $RCSfile: frame.cls.php,v $
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* Created on: 2004-06-02
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*
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* Copyright (c) 2004 - Benj Carson <benjcarson@digitaljunkies.ca>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this library in the file LICENSE.LGPL; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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* 02111-1307 USA
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*
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* Alternatively, you may distribute this software under the terms of the
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* PHP License, version 3.0 or later. A copy of this license should have
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* been distributed with this file in the file LICENSE.PHP . If this is not
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* the case, you can obtain a copy at http://www.php.net/license/3_0.txt.
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*
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* The latest version of DOMPDF might be available at:
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* http://www.dompdf.com/
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*
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* @link http://www.dompdf.com/
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* @copyright 2004 Benj Carson
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* @author Benj Carson <benjcarson@digitaljunkies.ca>
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* @package dompdf
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*/
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/* $Id: frame.cls.php 359 2011-02-05 12:15:06Z fabien.menager $ */
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/**
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* The main Frame class
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*
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* This class represents a single HTML element. This class stores
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* positioning information as well as containing block location and
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* dimensions. Style information for the element is stored in a {@link
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* Style} object. Tree structure is maintained via the parent & children
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* links.
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*
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* @access protected
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* @package dompdf
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*/
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class Frame {
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/**
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* The DOMNode object this frame represents
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*
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* @var DOMNode
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*/
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protected $_node;
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/**
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* Unique identifier for this frame. Used to reference this frame
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* via the node.
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*
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* @var string
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*/
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protected $_id;
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/**
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* Unique id counter
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*/
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static protected $ID_COUNTER = 0;
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/**
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* This frame's calculated style
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*
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* @var Style
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*/
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protected $_style;
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/**
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* This frame's original style. Needed for cases where frames are
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* split across pages.
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*
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* @var Style
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*/
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protected $_original_style;
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/**
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* This frame's parent in the document tree.
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*
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* @var Frame
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*/
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protected $_parent;
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/**
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* This frame's first child. All children are handled as a
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* doubly-linked list.
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*
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* @var Frame
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*/
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protected $_first_child;
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/**
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* This frame's last child.
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*
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* @var Frame
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*/
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protected $_last_child;
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/**
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* This frame's previous sibling in the document tree.
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*
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* @var Frame
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*/
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protected $_prev_sibling;
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/**
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* This frame's next sibling in the document tree.
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*
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* @var Frame
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*/
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protected $_next_sibling;
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/**
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* This frame's containing block (used in layout): array(x, y, w, h)
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*
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* @var array
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*/
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protected $_containing_block;
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/**
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* Position on the page of the top-left corner of the margin box of
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* this frame: array(x,y)
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*
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* @var array
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*/
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protected $_position;
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/**
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* Absolute opacity of this frame
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*
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* @var float
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*/
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protected $_opacity;
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/**
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* This frame's decorator
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*
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* @var Frame_Decorator
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*/
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protected $_decorator;
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protected $_containing_line;
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/**
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* Tells wether the frame was already pushed to the next page
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* @var bool
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*/
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public $_already_pushed = false;
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/**
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* Class destructor
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*/
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function __destruct() {
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clear_object($this);
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}
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/**
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* Class constructor
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*
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* @param DOMNode $node the DOMNode this frame represents
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*/
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function __construct(DomNode $node) {
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$this->_node = $node;
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$this->_parent = null;
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$this->_first_child = null;
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$this->_last_child = null;
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$this->_prev_sibling = $this->_next_sibling = null;
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$this->_style = null;
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$this->_original_style = null;
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$this->_containing_block = array(
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"x" => null,
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"y" => null,
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"w" => null,
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"h" => null,
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);
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$this->_containing_block[0] =& $this->_containing_block["x"];
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$this->_containing_block[1] =& $this->_containing_block["y"];
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$this->_containing_block[2] =& $this->_containing_block["w"];
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$this->_containing_block[3] =& $this->_containing_block["h"];
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$this->_position = array(
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"x" => null,
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"y" => null,
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);
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$this->_position[0] =& $this->_position["x"];
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$this->_position[1] =& $this->_position["y"];
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$this->_opacity = 1.0;
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$this->_decorator = null;
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$this->set_id( self::$ID_COUNTER++ );
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}
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/**
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* "Destructor": forcibly free all references held by this frame
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*
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* @param bool $recursive if true, call dispose on all children
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*/
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function dispose($recursive = false) {
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if ( $recursive ) {
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while ( $child = $this->_first_child )
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$child->dispose(true);
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}
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// Remove this frame from the tree
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if ( $this->_prev_sibling ) {
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$this->_prev_sibling->_next_sibling = $this->_next_sibling;
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}
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if ( $this->_next_sibling ) {
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$this->_next_sibling->_prev_sibling = $this->_prev_sibling;
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}
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if ( $this->_parent && $this->_parent->_first_child === $this ) {
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$this->_parent->_first_child = $this->_next_sibling;
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}
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if ( $this->_parent && $this->_parent->_last_child === $this ) {
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$this->_parent->_last_child = $this->_prev_sibling;
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}
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if ( $this->_parent ) {
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$this->_parent->get_node()->removeChild($this->_node);
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}
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$this->_style->dispose();
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$this->_style = null;
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unset($this->_style);
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$this->_original_style->dispose();
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$this->_original_style = null;
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unset($this->_original_style);
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}
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// Re-initialize the frame
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function reset() {
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$this->_position["x"] = null;
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$this->_position["y"] = null;
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$this->_containing_block["x"] = null;
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$this->_containing_block["y"] = null;
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$this->_containing_block["w"] = null;
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$this->_containing_block["h"] = null;
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$this->_style = null;
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unset($this->_style);
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$this->_style = clone $this->_original_style;
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}
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//........................................................................
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// Accessor methods
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/**
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* @return DOMNode
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*/
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function get_node() { return $this->_node; }
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/**
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* @return string
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*/
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function get_id() { return $this->_id; }
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/**
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* @return Style
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*/
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function get_style() { return $this->_style; }
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/**
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* @return Style
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*/
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function get_original_style() { return $this->_original_style; }
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/**
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* @return Frame
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*/
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function get_parent() { return $this->_parent; }
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/**
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* @return Frame_Decorator
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*/
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function get_decorator() { return $this->_decorator; }
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/**
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* @return Frame
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*/
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function get_first_child() { return $this->_first_child; }
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/**
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* @return Frame
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*/
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function get_last_child() { return $this->_last_child; }
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/**
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* @return Frame
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*/
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function get_prev_sibling() { return $this->_prev_sibling; }
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/**
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* @return Frame
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*/
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function get_next_sibling() { return $this->_next_sibling; }
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/**
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* @return FrameList
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*/
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function get_children() { return new FrameList($this); }
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// Layout property accessors
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/**
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* Containing block dimensions
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*
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* @param $i string The key of the wanted containing block's dimension (x, y, x, h)
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* @return array|float
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*/
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function get_containing_block($i = null) {
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if ( isset($i) )
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return $this->_containing_block[$i];
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return $this->_containing_block;
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}
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/**
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* Block position
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*
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* @param $i string The key of the wanted position value (x, y)
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* @return array|float
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*/
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function get_position($i = null) {
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if ( isset($i) ) {
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return $this->_position[$i];
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}
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return $this->_position;
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}
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//........................................................................
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/**
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* Return the height of the margin box of the frame, in pt. Meaningless
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* unless the height has been calculated properly.
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*
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* @return float
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*/
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function get_margin_height() {
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$style = $this->_style;
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return $style->length_in_pt(array(
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$style->height,
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$style->margin_top,
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$style->margin_bottom,
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$style->border_top_width,
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$style->border_bottom_width,
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$style->padding_top,
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$style->padding_bottom
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), $this->_containing_block["h"]);
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}
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/**
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* Return the width of the margin box of the frame, in pt. Meaningless
|
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* unless the width has been calculated properly.
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*
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* @return float
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*/
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function get_margin_width() {
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$style = $this->_style;
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return $style->length_in_pt(array(
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$style->width,
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$style->margin_left,
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$style->margin_right,
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$style->border_left_width,
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$style->border_right_width,
|
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$style->padding_left,
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$style->padding_right
|
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), $this->_containing_block["w"]);
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}
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function get_break_margins(){
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$style = $this->_style;
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return $style->length_in_pt(array(
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//$style->height,
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$style->margin_top,
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$style->margin_bottom,
|
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$style->border_top_width,
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$style->border_bottom_width,
|
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$style->padding_top,
|
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$style->padding_bottom
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||||
), $this->_containing_block["h"]);
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||||
}
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|
||||
/**
|
||||
* Return the padding box (x,y,w,h) of the frame
|
||||
*
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||||
* @return array
|
||||
*/
|
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function get_padding_box() {
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||||
$style = $this->_style;
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$cb = $this->_containing_block;
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$x = $this->_position["x"] +
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$style->length_in_pt(array($style->margin_left,
|
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$style->border_left_width),
|
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$cb["w"]);
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||||
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||||
$y = $this->_position["y"] +
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$style->length_in_pt(array($style->margin_top,
|
||||
$style->border_top_width),
|
||||
$cb["h"]);
|
||||
|
||||
$w = $style->length_in_pt(array($style->padding_left,
|
||||
$style->width,
|
||||
$style->padding_right),
|
||||
$cb["w"]);
|
||||
|
||||
$h = $style->length_in_pt(array($style->padding_top,
|
||||
$style->height,
|
||||
$style->padding_bottom),
|
||||
$cb["h"]);
|
||||
|
||||
return array(0 => $x, "x" => $x,
|
||||
1 => $y, "y" => $y,
|
||||
2 => $w, "w" => $w,
|
||||
3 => $h, "h" => $h);
|
||||
}
|
||||
|
||||
/**
|
||||
* Return the border box of the frame
|
||||
*
|
||||
* @return array
|
||||
*/
|
||||
function get_border_box() {
|
||||
$style = $this->_style;
|
||||
$cb = $this->_containing_block;
|
||||
|
||||
$x = $this->_position["x"] + $style->length_in_pt($style->margin_left, $cb["w"]);
|
||||
|
||||
$y = $this->_position["y"] + $style->length_in_pt($style->margin_top, $cb["h"]);
|
||||
|
||||
$w = $style->length_in_pt(array($style->border_left_width,
|
||||
$style->padding_left,
|
||||
$style->width,
|
||||
$style->padding_right,
|
||||
$style->border_right_width),
|
||||
$cb["w"]);
|
||||
|
||||
$h = $style->length_in_pt(array($style->border_top_width,
|
||||
$style->padding_top,
|
||||
$style->height,
|
||||
$style->padding_bottom,
|
||||
$style->border_bottom_width),
|
||||
$cb["h"]);
|
||||
|
||||
return array(0 => $x, "x" => $x,
|
||||
1 => $y, "y" => $y,
|
||||
2 => $w, "w" => $w,
|
||||
3 => $h, "h" => $h);
|
||||
}
|
||||
|
||||
function get_opacity($opacity = null) {
|
||||
if ( $opacity !== null ) {
|
||||
$this->set_opacity($opacity);
|
||||
}
|
||||
return $this->_opacity;
|
||||
}
|
||||
|
||||
function &get_containing_line() {
|
||||
return $this->_containing_line;
|
||||
}
|
||||
|
||||
//........................................................................
|
||||
|
||||
// Set methods
|
||||
function set_id($id) {
|
||||
$this->_id = $id;
|
||||
|
||||
// We can only set attributes of DOMElement objects (nodeType == 1).
|
||||
// Since these are the only objects that we can assign CSS rules to,
|
||||
// this shortcoming is okay.
|
||||
if ( $this->_node->nodeType == XML_ELEMENT_NODE )
|
||||
$this->_node->setAttribute("frame_id", $id);
|
||||
}
|
||||
|
||||
function set_style(Style $style) {
|
||||
if ( is_null($this->_style) )
|
||||
$this->_original_style = clone $style;
|
||||
|
||||
//$style->set_frame($this);
|
||||
$this->_style = $style;
|
||||
}
|
||||
|
||||
function set_decorator(Frame_Decorator $decorator) {
|
||||
$this->_decorator = $decorator;
|
||||
}
|
||||
|
||||
function set_containing_block($x = null, $y = null, $w = null, $h = null) {
|
||||
if ( is_array($x) ){
|
||||
foreach($x as $key => $val){
|
||||
$$key = $val;
|
||||
}
|
||||
}
|
||||
|
||||
if (is_numeric($x)) {
|
||||
$this->_containing_block["x"] = $x;
|
||||
}
|
||||
|
||||
if (is_numeric($y)) {
|
||||
$this->_containing_block["y"] = $y;
|
||||
}
|
||||
|
||||
if (is_numeric($w)) {
|
||||
$this->_containing_block["w"] = $w;
|
||||
}
|
||||
|
||||
if (is_numeric($h)) {
|
||||
$this->_containing_block["h"] = $h;
|
||||
}
|
||||
}
|
||||
|
||||
function set_position($x = null, $y = null) {
|
||||
if ( is_array($x) )
|
||||
extract($x);
|
||||
|
||||
if ( is_numeric($x) ) {
|
||||
$this->_position["x"] = $x;
|
||||
}
|
||||
|
||||
if ( is_numeric($y) ) {
|
||||
$this->_position["y"] = $y;
|
||||
}
|
||||
}
|
||||
|
||||
function set_opacity($opacity) {
|
||||
$parent = $this->get_parent();
|
||||
$base_opacity = (($parent && $parent->_opacity !== null) ? $parent->_opacity : 1.0);
|
||||
$this->_opacity = $base_opacity * $opacity;
|
||||
}
|
||||
|
||||
function set_containing_line(&$line) {
|
||||
$this->_containing_line = &$line;
|
||||
}
|
||||
|
||||
//........................................................................
|
||||
|
||||
/**
|
||||
* Inserts a new child at the beginning of the Frame
|
||||
*
|
||||
* @param $child Frame The new Frame to insert
|
||||
* @param $update_node boolean Whether or not to update the DOM
|
||||
*/
|
||||
function prepend_child(Frame $child, $update_node = true) {
|
||||
if ( $update_node )
|
||||
$this->_node->insertBefore($child->_node, $this->_first_child ? $this->_first_child->_node : null);
|
||||
|
||||
// Remove the child from its parent
|
||||
if ( $child->_parent )
|
||||
$child->_parent->remove_child($child, false);
|
||||
|
||||
$child->_parent = $this;
|
||||
$child->_prev_sibling = null;
|
||||
|
||||
// Handle the first child
|
||||
if ( !$this->_first_child ) {
|
||||
$this->_first_child = $child;
|
||||
$this->_last_child = $child;
|
||||
$child->_next_sibling = null;
|
||||
} else {
|
||||
$this->_first_child->_prev_sibling = $child;
|
||||
$child->_next_sibling = $this->_first_child;
|
||||
$this->_first_child = $child;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Inserts a new child at the end of the Frame
|
||||
*
|
||||
* @param $child Frame The new Frame to insert
|
||||
* @param $update_node boolean Whether or not to update the DOM
|
||||
*/
|
||||
function append_child(Frame $child, $update_node = true) {
|
||||
if ( $update_node )
|
||||
$this->_node->appendChild($child->_node);
|
||||
|
||||
// Remove the child from its parent
|
||||
if ( $child->_parent )
|
||||
$child->_parent->remove_child($child, false);
|
||||
|
||||
$child->_parent = $this;
|
||||
$child->_next_sibling = null;
|
||||
|
||||
// Handle the first child
|
||||
if ( !$this->_last_child ) {
|
||||
$this->_first_child = $child;
|
||||
$this->_last_child = $child;
|
||||
$child->_prev_sibling = null;
|
||||
} else {
|
||||
$this->_last_child->_next_sibling = $child;
|
||||
$child->_prev_sibling = $this->_last_child;
|
||||
$this->_last_child = $child;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Inserts a new child immediately before the specified frame
|
||||
*
|
||||
* @param $new_child Frame The new Frame to insert
|
||||
* @param $ref Frame The Frame after the new Frame
|
||||
* @param $update_node boolean Whether or not to update the DOM
|
||||
*/
|
||||
function insert_child_before(Frame $new_child, Frame $ref, $update_node = true) {
|
||||
if ( $ref === $this->_first_child ) {
|
||||
$this->prepend_child($new_child, $update_node);
|
||||
return;
|
||||
}
|
||||
|
||||
if ( is_null($ref) ) {
|
||||
$this->append_child($new_child, $update_node);
|
||||
return;
|
||||
}
|
||||
|
||||
if ( $ref->_parent !== $this )
|
||||
throw new DOMPDF_Exception("Reference child is not a child of this node.");
|
||||
|
||||
// Update the node
|
||||
if ( $update_node )
|
||||
$this->_node->insertBefore($new_child->_node, $ref->_node);
|
||||
|
||||
// Remove the child from its parent
|
||||
if ( $new_child->_parent )
|
||||
$new_child->_parent->remove_child($new_child, false);
|
||||
|
||||
$new_child->_parent = $this;
|
||||
$new_child->_next_sibling = $ref;
|
||||
$new_child->_prev_sibling = $ref->_prev_sibling;
|
||||
|
||||
if ( $ref->_prev_sibling )
|
||||
$ref->_prev_sibling->_next_sibling = $new_child;
|
||||
|
||||
$ref->_prev_sibling = $new_child;
|
||||
}
|
||||
|
||||
/**
|
||||
* Inserts a new child immediately after the specified frame
|
||||
*
|
||||
* @param $new_child Frame The new Frame to insert
|
||||
* @param $ref Frame The Frame before the new Frame
|
||||
* @param $update_node boolean Whether or not to update the DOM
|
||||
*/
|
||||
function insert_child_after(Frame $new_child, Frame $ref, $update_node = true) {
|
||||
if ( $ref === $this->_last_child ) {
|
||||
$this->append_child($new_child, $update_node);
|
||||
return;
|
||||
}
|
||||
|
||||
if ( is_null($ref) ) {
|
||||
$this->prepend_child($new_child, $update_node);
|
||||
return;
|
||||
}
|
||||
|
||||
if ( $ref->_parent !== $this )
|
||||
throw new DOMPDF_Exception("Reference child is not a child of this node.");
|
||||
|
||||
// Update the node
|
||||
if ( $update_node ) {
|
||||
if ( $ref->_next_sibling ) {
|
||||
$next_node = $ref->_next_sibling->_node;
|
||||
$this->_node->insertBefore($new_child->_node, $next_node);
|
||||
} else {
|
||||
$new_child->_node = $this->_node->appendChild($new_child);
|
||||
}
|
||||
}
|
||||
|
||||
// Remove the child from its parent
|
||||
if ( $new_child->_parent)
|
||||
$new_child->_parent->remove_child($new_child, false);
|
||||
|
||||
$new_child->_parent = $this;
|
||||
$new_child->_prev_sibling = $ref;
|
||||
$new_child->_next_sibling = $ref->_next_sibling;
|
||||
|
||||
if ( $ref->_next_sibling )
|
||||
$ref->_next_sibling->_prev_sibling = $new_child;
|
||||
|
||||
$ref->_next_sibling = $new_child;
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* Remove a child frame
|
||||
*
|
||||
* @param $child Frame
|
||||
* @param $update_node boolean Whether or not to remove the DOM node
|
||||
* @return Frame The removed child frame
|
||||
*/
|
||||
function remove_child(Frame $child, $update_node = true) {
|
||||
if ( $child->_parent !== $this )
|
||||
throw new DOMPDF_Exception("Child not found in this frame");
|
||||
|
||||
if ( $update_node )
|
||||
$this->_node->removeChild($child->_node);
|
||||
|
||||
if ( $child === $this->_first_child )
|
||||
$this->_first_child = $child->_next_sibling;
|
||||
|
||||
if ( $child === $this->_last_child )
|
||||
$this->_last_child = $child->_prev_sibling;
|
||||
|
||||
if ( $child->_prev_sibling )
|
||||
$child->_prev_sibling->_next_sibling = $child->_next_sibling;
|
||||
|
||||
if ( $child->_next_sibling )
|
||||
$child->_next_sibling->_prev_sibling = $child->_prev_sibling;
|
||||
|
||||
$child->_next_sibling = null;
|
||||
$child->_prev_sibling = null;
|
||||
$child->_parent = null;
|
||||
return $child;
|
||||
}
|
||||
|
||||
//........................................................................
|
||||
|
||||
// Debugging function:
|
||||
function __toString() {
|
||||
// Skip empty text frames
|
||||
// if ( $this->_node->nodeName === "#text" &&
|
||||
// preg_replace("/\s/", "", $this->_node->data) === "" )
|
||||
// return "";
|
||||
|
||||
|
||||
$str = "<b>" . $this->_node->nodeName . ":</b><br/>";
|
||||
//$str .= spl_object_hash($this->_node) . "<br/>";
|
||||
$str .= "Id: " .$this->get_id() . "<br/>";
|
||||
$str .= "Class: " .get_class($this) . "<br/>";
|
||||
|
||||
if ( $this->_node->nodeName === "#text" ) {
|
||||
$tmp = htmlspecialchars($this->_node->nodeValue);
|
||||
$str .= "<pre>'" . mb_substr($tmp,0,70) .
|
||||
(mb_strlen($tmp) > 70 ? "..." : "") . "'</pre>";
|
||||
} elseif ( $css_class = $this->_node->getAttribute("class") ) {
|
||||
$tmp = htmlspecialchars($css_class);
|
||||
$str .= "CSS class: '$css_class'<br/>";
|
||||
}
|
||||
|
||||
if ( $this->_parent )
|
||||
$str .= "\nParent:" . $this->_parent->_node->nodeName .
|
||||
" (" . spl_object_hash($this->_parent->_node) . ") " .
|
||||
"<br/>";
|
||||
|
||||
if ( $this->_prev_sibling )
|
||||
$str .= "Prev: " . $this->_prev_sibling->_node->nodeName .
|
||||
" (" . spl_object_hash($this->_prev_sibling->_node) . ") " .
|
||||
"<br/>";
|
||||
|
||||
if ( $this->_next_sibling )
|
||||
$str .= "Next: " . $this->_next_sibling->_node->nodeName .
|
||||
" (" . spl_object_hash($this->_next_sibling->_node) . ") " .
|
||||
"<br/>";
|
||||
|
||||
$d = $this->get_decorator();
|
||||
while ($d && $d != $d->get_decorator()) {
|
||||
$str .= "Decorator: " . get_class($d) . "<br/>";
|
||||
$d = $d->get_decorator();
|
||||
}
|
||||
|
||||
$str .= "Position: " . pre_r($this->_position, true);
|
||||
$str .= "\nContaining block: " . pre_r($this->_containing_block, true);
|
||||
$str .= "\nMargin width: " . pre_r($this->get_margin_width(), true);
|
||||
$str .= "\nMargin height: " . pre_r($this->get_margin_height(), true);
|
||||
|
||||
$str .= "\nStyle: <pre>". $this->_style->__toString() . "</pre>";
|
||||
|
||||
if ( $this->_decorator instanceof Block_Frame_Decorator ) {
|
||||
$str .= "Lines:<pre>";
|
||||
foreach ($this->_decorator->get_lines() as $line) {
|
||||
foreach ($line["frames"] as $frame) {
|
||||
if ($frame instanceof Text_Frame_Decorator) {
|
||||
$str .= "\ntext: ";
|
||||
$str .= "'". htmlspecialchars($frame->get_text()) ."'";
|
||||
} else {
|
||||
$str .= "\nBlock: " . $frame->get_node()->nodeName . " (" . spl_object_hash($frame->get_node()) . ")";
|
||||
}
|
||||
}
|
||||
|
||||
$str .=
|
||||
//"\ncount => " . $line["count"] . "\n".
|
||||
"\ny => " . $line["y"] . "\n" .
|
||||
"w => " . $line["w"] . "\n" .
|
||||
"h => " . $line["h"] . "\n" .
|
||||
"left => " . $line["left"] . "\n" .
|
||||
"right => " . $line["right"] . "\n";
|
||||
}
|
||||
$str .= "</pre>";
|
||||
}
|
||||
$str .= "\n";
|
||||
if ( php_sapi_name() === "cli" )
|
||||
$str = strip_tags(str_replace(array("<br/>","<b>","</b>"),
|
||||
array("\n","",""),
|
||||
$str));
|
||||
|
||||
return $str;
|
||||
}
|
||||
}
|
||||
|
||||
//------------------------------------------------------------------------
|
||||
|
||||
/**
|
||||
* Linked-list IteratorAggregate
|
||||
*
|
||||
* @access private
|
||||
* @package dompdf
|
||||
*/
|
||||
class FrameList implements IteratorAggregate {
|
||||
protected $_frame;
|
||||
|
||||
function __construct($frame) { $this->_frame = $frame; }
|
||||
function getIterator() { return new FrameListIterator($this->_frame); }
|
||||
}
|
||||
|
||||
/**
|
||||
* Linked-list Iterator
|
||||
*
|
||||
* Returns children in order and allows for list to change during iteration,
|
||||
* provided the changes occur to or after the current element
|
||||
*
|
||||
* @access private
|
||||
* @package dompdf
|
||||
*/
|
||||
class FrameListIterator implements Iterator {
|
||||
|
||||
/**
|
||||
* @var Frame
|
||||
*/
|
||||
protected $_parent;
|
||||
|
||||
/**
|
||||
* @var Frame
|
||||
*/
|
||||
protected $_cur;
|
||||
|
||||
/**
|
||||
* @var int
|
||||
*/
|
||||
protected $_num;
|
||||
|
||||
function __construct(Frame $frame) {
|
||||
$this->_parent = $frame;
|
||||
$this->_cur = $frame->get_first_child();
|
||||
$this->_num = 0;
|
||||
}
|
||||
|
||||
function rewind() {
|
||||
$this->_cur = $this->_parent->get_first_child();
|
||||
$this->_num = 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* @return bool
|
||||
*/
|
||||
function valid() {
|
||||
return isset($this->_cur);// && ($this->_cur->get_prev_sibling() === $this->_prev);
|
||||
}
|
||||
|
||||
function key() { return $this->_num; }
|
||||
|
||||
/**
|
||||
* @return Frame
|
||||
*/
|
||||
function current() { return $this->_cur; }
|
||||
|
||||
/**
|
||||
* @return Frame
|
||||
*/
|
||||
function next() {
|
||||
|
||||
$ret = $this->_cur;
|
||||
if ( !$ret )
|
||||
return null;
|
||||
|
||||
$this->_cur = $this->_cur->get_next_sibling();
|
||||
$this->_num++;
|
||||
return $ret;
|
||||
}
|
||||
}
|
||||
|
||||
//------------------------------------------------------------------------
|
||||
|
||||
/**
|
||||
* Pre-order IteratorAggregate
|
||||
*
|
||||
* @access private
|
||||
* @package dompdf
|
||||
*/
|
||||
class FrameTreeList implements IteratorAggregate {
|
||||
/**
|
||||
* @var Frame
|
||||
*/
|
||||
protected $_root;
|
||||
|
||||
function __construct(Frame $root) { $this->_root = $root; }
|
||||
|
||||
/**
|
||||
* @return FrameTreeIterator
|
||||
*/
|
||||
function getIterator() { return new FrameTreeIterator($this->_root); }
|
||||
}
|
||||
|
||||
/**
|
||||
* Pre-order Iterator
|
||||
*
|
||||
* Returns frames in preorder traversal order (parent then children)
|
||||
*
|
||||
* @access private
|
||||
* @package dompdf
|
||||
*/
|
||||
class FrameTreeIterator implements Iterator {
|
||||
/**
|
||||
* @var Frame
|
||||
*/
|
||||
protected $_root;
|
||||
protected $_stack = array();
|
||||
|
||||
/**
|
||||
* @var int
|
||||
*/
|
||||
protected $_num;
|
||||
|
||||
function __construct(Frame $root) {
|
||||
$this->_stack[] = $this->_root = $root;
|
||||
$this->_num = 0;
|
||||
}
|
||||
|
||||
function rewind() {
|
||||
$this->_stack = array($this->_root);
|
||||
$this->_num = 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* @return bool
|
||||
*/
|
||||
function valid() { return count($this->_stack) > 0; }
|
||||
|
||||
/**
|
||||
* @return int
|
||||
*/
|
||||
function key() { return $this->_num; }
|
||||
|
||||
/**
|
||||
* @var Frame
|
||||
*/
|
||||
function current() { return end($this->_stack); }
|
||||
|
||||
/**
|
||||
* @var Frame
|
||||
*/
|
||||
function next() {
|
||||
$b = end($this->_stack);
|
||||
|
||||
// Pop last element
|
||||
unset($this->_stack[ key($this->_stack) ]);
|
||||
$this->_num++;
|
||||
|
||||
// Push all children onto the stack in reverse order
|
||||
if ( $c = $b->get_last_child() ) {
|
||||
$this->_stack[] = $c;
|
||||
while ( $c = $c->get_prev_sibling() )
|
||||
$this->_stack[] = $c;
|
||||
}
|
||||
return $b;
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user