1 | <?php
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2 | /**
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3 | * DOMPDF - PHP5 HTML to PDF renderer
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4 | *
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5 | * File: $RCSfile: frame.cls.php,v $
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6 | * Created on: 2004-06-02
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7 | *
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8 | * Copyright (c) 2004 - Benj Carson <benjcarson@digitaljunkies.ca>
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9 | *
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10 | * This library is free software; you can redistribute it and/or
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11 | * modify it under the terms of the GNU Lesser General Public
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12 | * License as published by the Free Software Foundation; either
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13 | * version 2.1 of the License, or (at your option) any later version.
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14 | *
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15 | * This library is distributed in the hope that it will be useful,
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16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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18 | * Lesser General Public License for more details.
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19 | *
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20 | * You should have received a copy of the GNU Lesser General Public License
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21 | * along with this library in the file LICENSE.LGPL; if not, write to the
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22 | * Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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23 | * 02111-1307 USA
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24 | *
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25 | * Alternatively, you may distribute this software under the terms of the
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26 | * PHP License, version 3.0 or later. A copy of this license should have
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27 | * been distributed with this file in the file LICENSE.PHP . If this is not
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28 | * the case, you can obtain a copy at http://www.php.net/license/3_0.txt.
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29 | *
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30 | * The latest version of DOMPDF might be available at:
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31 | * http://www.digitaljunkies.ca/dompdf
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32 | *
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33 | * @link http://www.digitaljunkies.ca/dompdf
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34 | * @copyright 2004 Benj Carson
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35 | * @author Benj Carson <benjcarson@digitaljunkies.ca>
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36 | * @package dompdf
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37 | * @version 0.5.1
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38 | */
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39 |
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40 | /* $Id: frame.cls.php 186 2009-10-19 22:42:06Z eclecticgeek@gmail.com $ */
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41 |
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42 | /**
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43 | * The main Frame class
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44 | *
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45 | * This class represents a single HTML element. This class stores
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46 | * positioning information as well as containing block location and
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47 | * dimensions. Style information for the element is stored in a {@link
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48 | * Style} object. Tree structure is maintained via the parent & children
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49 | * links.
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50 | *
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51 | * @access protected
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52 | * @package dompdf
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53 | */
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54 | class Frame {
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55 |
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56 | /**
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57 | * The DOMNode object this frame represents
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58 | *
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59 | * @var DOMNode
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60 | */
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61 | protected $_node;
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62 |
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63 | /**
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64 | * Unique identifier for this frame. Used to reference this frame
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65 | * via the node.
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66 | *
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67 | * @var string
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68 | */
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69 | protected $_id;
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70 |
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71 | /**
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72 | * Unique id counter
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73 | */
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74 | static protected $ID_COUNTER = 0;
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75 |
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76 | /**
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77 | * This frame's calculated style
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78 | *
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79 | * @var Style
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80 | */
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81 | protected $_style;
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82 |
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83 | /**
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84 | * This frame's original style. Needed for cases where frames are
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85 | * split across pages.
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86 | *
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87 | * @var Style
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88 | */
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89 | protected $_original_style;
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90 |
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91 | /**
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92 | * This frame's parent in the document tree.
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93 | *
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94 | * @var Frame
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95 | */
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96 | protected $_parent;
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97 |
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98 | /**
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99 | * This frame's first child. All children are handled as a
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100 | * doubly-linked list.
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101 | *
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102 | * @var Frame
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103 | */
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104 | protected $_first_child;
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105 |
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106 | /**
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107 | * This frame's last child.
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108 | *
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109 | * @var Frame
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110 | */
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111 | protected $_last_child;
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112 |
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113 | /**
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114 | * This frame's previous sibling in the document tree.
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115 | *
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116 | * @var Frame
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117 | */
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118 | protected $_prev_sibling;
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119 |
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120 | /**
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121 | * This frame's next sibling in the document tree.
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122 | *
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123 | * @var Frame
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124 | */
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125 | protected $_next_sibling;
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126 |
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127 | /**
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128 | * This frame's containing block (used in layout): array(x, y, w, h)
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129 | *
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130 | * @var array
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131 | */
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132 | protected $_containing_block;
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133 |
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134 | /**
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135 | * Position on the page of the top-left corner of the margin box of
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136 | * this frame: array(x,y)
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137 | *
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138 | * @var array
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139 | */
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140 | protected $_position;
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141 |
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142 | /**
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143 | * This frame's decorator
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144 | *
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145 | * @var Frame_Decorator
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146 | */
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147 | protected $_decorator;
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148 |
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149 | /**
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150 | * Class constructor
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151 | *
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152 | * @param DOMNode $node the DOMNode this frame represents
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153 | */
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154 | function __construct(DomNode $node) {
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155 | $this->_node = $node;
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156 |
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157 | $this->_parent = null;
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158 | $this->_first_child = null;
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159 | $this->_last_child = null;
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160 | $this->_prev_sibling = $this->_next_sibling = null;
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161 |
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162 | $this->_style = null;
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163 | $this->_original_style = null;
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164 |
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165 | $this->_containing_block = array("x" => null,
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166 | "y" => null,
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167 | "w" => null,
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168 | "h" => null);
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169 | $this->_position = array("x" => null,
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170 | "y" => null);
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171 |
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172 | $this->_decorator = null;
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173 |
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174 | $this->set_id( self::$ID_COUNTER++ );
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175 | }
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176 |
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177 | /**
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178 | * "Destructor": forcibly free all references held by this frame
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179 | *
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180 | * @param bool $recursive if true, call dispose on all children
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181 | */
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182 | function dispose($recursive = false) {
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183 |
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184 | if ( $recursive ) {
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185 | while ( $child = $this->_first_child )
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186 | $child->dispose(true);
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187 | }
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188 |
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189 | // Remove this frame from the tree
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190 | if ( $this->_prev_sibling ) {
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191 | $this->_prev_sibling->_next_sibling = $this->_next_sibling;
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192 | }
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193 |
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194 | if ( $this->_next_sibling ) {
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195 | $this->_next_sibling->_prev_sibling = $this->_prev_sibling;
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196 | }
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197 |
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198 | if ( $this->_parent && $this->_parent->_first_child === $this ) {
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199 | $this->_parent->_first_child = $this->_next_sibling;
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200 | }
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201 |
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202 | if ( $this->_parent && $this->_parent->_last_child === $this ) {
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203 | $this->_parent->_last_child = $this->_prev_sibling;
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204 | }
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205 |
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206 | if ( $this->_parent ) {
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207 | $this->_parent->get_node()->removeChild($this->_node);
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208 | }
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209 |
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210 | $this->_style->dispose();
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211 | unset($this->_style);
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212 | $this->_original_style->dispose();
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213 | unset($this->_original_style);
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214 |
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215 | }
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216 |
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217 | // Re-initialize the frame
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218 | function reset() {
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219 | $this->_position = array("x" => null,
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220 | "y" => null);
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221 | $this->_containing_block = array("x" => null,
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222 | "y" => null,
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223 | "w" => null,
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224 | "h" => null);
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225 |
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226 | unset($this->_style);
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227 | $this->_style = clone $this->_original_style;
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228 |
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229 | }
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230 |
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231 | //........................................................................
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232 |
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233 | // Accessor methods
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234 | function get_node() { return $this->_node; }
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235 | function get_id() { return $this->_id; }
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236 | function get_style() { return $this->_style; }
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237 | function get_original_style() { return $this->_original_style; }
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238 | function get_parent() { return $this->_parent; }
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239 | function get_decorator() { return $this->_decorator; }
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240 | function get_first_child() { return $this->_first_child; }
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241 | function get_last_child() { return $this->_last_child; }
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242 | function get_prev_sibling() { return $this->_prev_sibling; }
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243 | function get_next_sibling() { return $this->_next_sibling; }
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244 |
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245 | function get_children() { return new FrameList($this); }
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246 |
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247 | // Layout property accessors
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248 | function get_containing_block($i = null) {
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249 | if ( isset($i) )
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250 | return $this->_containing_block[$i];
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251 | return $this->_containing_block;
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252 | }
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253 |
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254 | function get_position($i = null) {
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255 | if ( isset($i) )
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256 | return $this->_position[$i];
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257 | return array($this->_position["x"],
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258 | $this->_position["y"],
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259 | "x"=>$this->_position["x"],
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260 | "y"=>$this->_position["y"]);
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261 | }
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262 |
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263 | //........................................................................
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264 |
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265 | // Return the height of the margin box of the frame, in pt. Meaningless
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266 | // unless the height has been calculated properly.
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267 | function get_margin_height() {
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268 | return $this->_style->length_in_pt(array($this->_style->height,
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269 | $this->_style->margin_top,
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270 | $this->_style->margin_bottom,
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271 | $this->_style->border_top_width,
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272 | $this->_style->border_bottom_width,
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273 | $this->_style->padding_top,
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274 | $this->_style->padding_bottom),
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275 | $this->_containing_block["w"]);
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276 | }
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277 |
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278 | // Return the width of the margin box of the frame, in pt. Meaningless
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279 | // unless the width has been calculted properly.
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280 | function get_margin_width() {
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281 | return $this->_style->length_in_pt(array($this->_style->width,
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282 | $this->_style->margin_left,
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283 | $this->_style->margin_right,
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284 | $this->_style->border_left_width,
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285 | $this->_style->border_right_width,
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286 | $this->_style->padding_left,
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287 | $this->_style->padding_right),
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288 | $this->_containing_block["w"]);
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289 | }
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290 |
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291 | // Return the padding box (x,y,w,h) of the frame
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292 | function get_padding_box() {
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293 | $x = $this->_position["x"] +
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294 | $this->_style->length_in_pt(array($this->_style->margin_left,
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295 | $this->_style->border_left_width),
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296 | $this->_containing_block["w"]);
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297 | $y = $this->_position["y"] +
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298 | $this->_style->length_in_pt(array($this->_style->margin_top,
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299 | $this->_style->border_top_width),
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300 | $this->_containing_block["w"]);
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301 |
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302 | $w = $this->_style->length_in_pt(array($this->_style->padding_left,
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303 | $this->_style->width,
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304 | $this->_style->padding_right),
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305 | $this->_containing_block["w"]);
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306 |
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307 | $h = $this->_style->length_in_pt(array($this->_style->padding_top,
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308 | $this->_style->height,
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309 | $this->_style->padding_bottom),
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310 | $this->_containing_block["w"]);
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311 |
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312 | return array(0 => $x, "x" => $x,
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313 | 1 => $y, "y" => $y,
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314 | 2 => $w, "w" => $w,
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315 | 3 => $h, "h" => $h);
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316 | }
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317 |
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318 | // Return the border box of the frame
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319 | function get_border_box() {
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320 | $x = $this->_position["x"] +
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321 | $this->_style->length_in_pt($this->_style->margin_left,
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322 | $this->_containing_block["w"]);
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323 | $y = $this->_position["y"] +
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324 | $this->_style->length_in_pt($this->_style->margin_top,
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325 | $this->_containing_block["w"]);
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326 |
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327 | $w = $this->_style->length_in_pt(array($this->_style->border_left_width,
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328 | $this->_style->padding_left,
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329 | $this->_style->width,
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330 | $this->_style->padding_right,
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331 | $this->_style->border_right_width),
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332 | $this->_containing_block["w"]);
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333 |
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334 | $h = $this->_style->length_in_pt(array($this->_style->border_top_width,
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335 | $this->_style->padding_top,
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336 | $this->_style->height,
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337 | $this->_style->padding_bottom,
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338 | $this->_style->border_bottom_width),
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339 | $this->_containing_block["w"]);
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340 |
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341 | return array(0 => $x, "x" => $x,
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342 | 1 => $y, "y" => $y,
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343 | 2 => $w, "w" => $w,
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344 | 3 => $h, "h" => $h);
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345 |
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346 | }
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347 |
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348 | //........................................................................
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349 |
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350 | // Set methods
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351 | function set_id($id) {
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352 | $this->_id = $id;
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353 |
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354 | // We can only set attributes of DOMElement objects (nodeType == 1).
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355 | // Since these are the only objects that we can assign CSS rules to,
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356 | // this shortcoming is okay.
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357 | if ( $this->_node->nodeType == 1)
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358 | $this->_node->setAttribute("frame_id", $id);
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359 | }
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360 |
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361 | function set_style(Style $style) {
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362 | if ( is_null($this->_style) )
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363 | $this->_original_style = clone $style;
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364 |
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365 | $this->_style = $style;
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366 | }
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367 |
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368 | function set_decorator(Frame_Decorator $decorator) {
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369 | $this->_decorator = $decorator;
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370 | }
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371 |
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372 | function set_containing_block($x = null, $y = null, $w = null, $h = null) {
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373 | if ( is_array($x) ){
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374 | foreach($x AS $key => $val){
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375 | $$key = $val;
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376 | }
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377 | }
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378 |
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379 | if (is_numeric($x)) {
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380 | $this->_containing_block[0] = $x;
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381 | $this->_containing_block["x"] = $x;
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382 | }
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383 |
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384 | if (is_numeric($y)) {
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385 | $this->_containing_block[1] = $y;
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386 | $this->_containing_block["y"] = $y;
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387 | }
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388 |
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389 | if (is_numeric($w)) {
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390 | $this->_containing_block[2] = $w;
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391 | $this->_containing_block["w"] = $w;
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392 | }
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393 |
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394 | if (is_numeric($h)) {
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395 | $this->_containing_block[3] = $h;
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396 | $this->_containing_block["h"] = $h;
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397 | }
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398 |
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399 | }
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400 |
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401 | function set_position($x = null, $y = null) {
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402 | if ( is_array($x) )
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403 | extract($x);
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404 |
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405 | if ( is_numeric($x) ) {
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406 | $this->_position[0] = $x;
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407 | $this->_position["x"] = $x;
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408 | }
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409 |
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410 | if ( is_numeric($y) ) {
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411 | $this->_position[1] = $y;
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412 | $this->_position["y"] = $y;
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413 | }
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414 | }
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415 |
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416 | //........................................................................
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417 |
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418 | function prepend_child(Frame $child, $update_node = true) {
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419 |
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420 | if ( $update_node )
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421 | $this->_node->insertBefore($child->_node, $this->_first_child ? $this->_first_child->_node : null);
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422 |
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423 | // Remove the child from its parent
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424 | if ( $child->_parent )
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425 | $child->_parent->remove_child($child, false);
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426 |
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427 | $child->_parent = $this;
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428 | $child->_prev_sibling = null;
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429 |
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430 | // Handle the first child
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431 | if ( !$this->_first_child ) {
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432 | $this->_first_child = $child;
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433 | $this->_last_child = $child;
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434 | $child->_next_sibling = null;
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435 |
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436 | } else {
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437 |
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438 | $this->_first_child->_prev_sibling = $child;
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439 | $child->_next_sibling = $this->_first_child;
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440 | $this->_first_child = $child;
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441 |
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442 | }
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443 | }
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444 |
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445 | function append_child(Frame $child, $update_node = true) {
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446 |
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447 | if ( $update_node )
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448 | $this->_node->appendChild($child->_node);
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449 |
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450 | // Remove the child from its parent
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451 | if ( $child->_parent )
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452 | $child->_parent->remove_child($child, false);
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453 |
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454 | $child->_parent = $this;
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455 | $child->_next_sibling = null;
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456 |
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457 | // Handle the first child
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458 | if ( !$this->_last_child ) {
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459 | $this->_first_child = $child;
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460 | $this->_last_child = $child;
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461 | $child->_prev_sibling = null;
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462 |
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463 | } else {
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464 |
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465 | $this->_last_child->_next_sibling = $child;
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466 | $child->_prev_sibling = $this->_last_child;
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467 | $this->_last_child = $child;
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468 |
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469 | }
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470 | }
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471 |
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472 | // Inserts a new child immediately before the specified frame
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473 | function insert_child_before(Frame $new_child, Frame $ref, $update_node = true) {
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474 |
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475 | if ( $ref === $this->_first_child ) {
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476 | $this->prepend_child($new_child, $update_node);
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477 | return;
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478 | }
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479 |
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480 | if ( is_null($ref) ) {
|
---|
481 | $this->append_child($new_child, $update_node);
|
---|
482 | return;
|
---|
483 | }
|
---|
484 |
|
---|
485 | if ( $ref->_parent !== $this )
|
---|
486 | throw new DOMPDF_Exception("Reference child is not a child of this node.");
|
---|
487 |
|
---|
488 | // Update the node
|
---|
489 | if ( $update_node )
|
---|
490 | $this->_node->insertBefore($new_child->_node, $ref->_node);
|
---|
491 |
|
---|
492 | // Remove the child from its parent
|
---|
493 | if ( $new_child->_parent )
|
---|
494 | $new_child->_parent->remove_child($new_child, false);
|
---|
495 |
|
---|
496 | $new_child->_parent = $this;
|
---|
497 | $new_child->_next_sibling = $ref;
|
---|
498 | $new_child->_prev_sibling = $ref->_prev_sibling;
|
---|
499 |
|
---|
500 | if ( $ref->_prev_sibling )
|
---|
501 | $ref->_prev_sibling->_next_sibling = $new_child;
|
---|
502 |
|
---|
503 | $ref->_prev_sibling = $new_child;
|
---|
504 | }
|
---|
505 |
|
---|
506 | // Inserts a new child immediately after the specified frame
|
---|
507 | function insert_child_after(Frame $new_child, Frame $ref, $update_node = true) {
|
---|
508 |
|
---|
509 | if ( $ref === $this->_last_child ) {
|
---|
510 | $this->append_child($new_child, $update_node);
|
---|
511 | return;
|
---|
512 | }
|
---|
513 |
|
---|
514 | if ( is_null($ref) ) {
|
---|
515 | $this->prepend_child($new_child, $update_node);
|
---|
516 | return;
|
---|
517 | }
|
---|
518 |
|
---|
519 | if ( $ref->_parent !== $this )
|
---|
520 | throw new DOMPDF_Exception("Reference child is not a child of this node.");
|
---|
521 |
|
---|
522 | // Update the node
|
---|
523 | if ( $update_node ) {
|
---|
524 | if ( $ref->_next_sibling ) {
|
---|
525 | $next_node = $ref->_next_sibling->_node;
|
---|
526 | $this->_node->insertBefore($new_child->_node, $next_node);
|
---|
527 | } else {
|
---|
528 | $new_child->_node = $this->_node->appendChild($new_child);
|
---|
529 | }
|
---|
530 | }
|
---|
531 |
|
---|
532 | // Remove the child from its parent
|
---|
533 | if ( $new_child->_parent)
|
---|
534 | $new_child->_parent->remove_child($new_child, false);
|
---|
535 |
|
---|
536 | $new_child->_parent = $this;
|
---|
537 | $new_child->_prev_sibling = $ref;
|
---|
538 | $new_child->_next_sibling = $ref->_next_sibling;
|
---|
539 |
|
---|
540 | if ( $ref->_next_sibling )
|
---|
541 | $ref->_next_sibling->_prev_sibling = $new_child;
|
---|
542 |
|
---|
543 | $ref->_next_sibling = $new_child;
|
---|
544 | }
|
---|
545 |
|
---|
546 |
|
---|
547 | function remove_child(Frame $child, $update_node = true) {
|
---|
548 |
|
---|
549 | if ( $child->_parent !== $this )
|
---|
550 | throw new DOMPDF_Exception("Child not found in this frame");
|
---|
551 |
|
---|
552 | if ( $update_node )
|
---|
553 | $this->_node->removeChild($child->_node);
|
---|
554 |
|
---|
555 | if ( $child === $this->_first_child )
|
---|
556 | $this->_first_child = $child->_next_sibling;
|
---|
557 |
|
---|
558 | if ( $child === $this->_last_child )
|
---|
559 | $this->_last_child = $child->_prev_sibling;
|
---|
560 |
|
---|
561 | if ( $child->_prev_sibling )
|
---|
562 | $child->_prev_sibling->_next_sibling = $child->_next_sibling;
|
---|
563 |
|
---|
564 | if ( $child->_next_sibling )
|
---|
565 | $child->_next_sibling->_prev_sibling = $child->_prev_sibling;
|
---|
566 |
|
---|
567 | $child->_next_sibling = null;
|
---|
568 | $child->_prev_sibling = null;
|
---|
569 | $child->_parent = null;
|
---|
570 | return $child;
|
---|
571 |
|
---|
572 | }
|
---|
573 |
|
---|
574 | //........................................................................
|
---|
575 |
|
---|
576 | // Debugging function:
|
---|
577 | function __toString() {
|
---|
578 |
|
---|
579 | // Skip empty text frames
|
---|
580 | // if ( $this->_node->nodeName == "#text" &&
|
---|
581 | // preg_replace("/\s/", "", $this->_node->data) === "" )
|
---|
582 | // return "";
|
---|
583 |
|
---|
584 |
|
---|
585 | $str = "<b>" . $this->_node->nodeName . ":</b><br/>";
|
---|
586 | //$str .= spl_object_hash($this->_node) . "<br/>";
|
---|
587 | $str .= "Id: " .$this->get_id() . "<br/>";
|
---|
588 | $str .= "Class: " .get_class($this) . "<br/>";
|
---|
589 |
|
---|
590 | if ( $this->_node->nodeName == "#text" ) {
|
---|
591 | $tmp = htmlspecialchars($this->_node->nodeValue);
|
---|
592 | $str .= "<pre>'" . mb_substr($tmp,0,70) .
|
---|
593 | (mb_strlen($tmp) > 70 ? "..." : "") . "'</pre>";
|
---|
594 | }
|
---|
595 | if ( $this->_parent )
|
---|
596 | $str .= "\nParent:" . $this->_parent->_node->nodeName .
|
---|
597 | " (" . spl_object_hash($this->_parent->_node) . ") " .
|
---|
598 | "<br/>";
|
---|
599 |
|
---|
600 | if ( $this->_prev_sibling )
|
---|
601 | $str .= "Prev: " . $this->_prev_sibling->_node->nodeName .
|
---|
602 | " (" . spl_object_hash($this->_prev_sibling->_node) . ") " .
|
---|
603 | "<br/>";
|
---|
604 |
|
---|
605 | if ( $this->_next_sibling )
|
---|
606 | $str .= "Next: " . $this->_next_sibling->_node->nodeName .
|
---|
607 | " (" . spl_object_hash($this->_next_sibling->_node) . ") " .
|
---|
608 | "<br/>";
|
---|
609 |
|
---|
610 | $d = $this->get_decorator();
|
---|
611 | while ($d && $d != $d->get_decorator()) {
|
---|
612 | $str .= "Decorator: " . get_class($d) . "<br/>";
|
---|
613 | $d = $d->get_decorator();
|
---|
614 | }
|
---|
615 |
|
---|
616 | $str .= "Position: " . pre_r($this->_position, true);
|
---|
617 | $str .= "\nContaining block: " . pre_r($this->_containing_block, true);
|
---|
618 | $str .= "\nMargin width: " . pre_r($this->get_margin_width(), true);
|
---|
619 | $str .= "\nMargin height: " . pre_r($this->get_margin_height(), true);
|
---|
620 |
|
---|
621 | $str .= "\nStyle: <pre>". $this->_style->__toString() . "</pre>";
|
---|
622 |
|
---|
623 | if ( $this->_decorator instanceof Block_Frame_Decorator ) {
|
---|
624 | $str .= "Lines:<pre>";
|
---|
625 | foreach ($this->_decorator->get_lines() as $line) {
|
---|
626 | foreach ($line["frames"] as $frame) {
|
---|
627 | if ($frame instanceof Text_Frame_Decorator) {
|
---|
628 | $str .= "\ntext: ";
|
---|
629 | $str .= "'". htmlspecialchars($frame->get_text()) ."'";
|
---|
630 | } else {
|
---|
631 | $str .= "\nBlock: " . $frame->get_node()->nodeName . " (" . spl_object_hash($frame->get_node()) . ")";
|
---|
632 | }
|
---|
633 | }
|
---|
634 |
|
---|
635 | $str .=
|
---|
636 | //"\ncount => " . $line["count"] . "\n".
|
---|
637 | "\ny => " . $line["y"] . "\n" .
|
---|
638 | "w => " . $line["w"] . "\n" .
|
---|
639 | "h => " . $line["h"] . "\n";
|
---|
640 | }
|
---|
641 | $str .= "</pre>";
|
---|
642 | }
|
---|
643 | $str .= "\n";
|
---|
644 | if ( php_sapi_name() == "cli" )
|
---|
645 | $str = strip_tags(str_replace(array("<br/>","<b>","</b>"),
|
---|
646 | array("\n","",""),
|
---|
647 | $str));
|
---|
648 |
|
---|
649 | return $str;
|
---|
650 | }
|
---|
651 |
|
---|
652 | }
|
---|
653 |
|
---|
654 | //------------------------------------------------------------------------
|
---|
655 |
|
---|
656 | /**
|
---|
657 | * Linked-list IteratorAggregate
|
---|
658 | *
|
---|
659 | * @access private
|
---|
660 | * @package dompdf
|
---|
661 | */
|
---|
662 | class FrameList implements IteratorAggregate {
|
---|
663 | protected $_frame;
|
---|
664 |
|
---|
665 | function __construct($frame) { $this->_frame = $frame; }
|
---|
666 | function getIterator() { return new FrameListIterator($this->_frame); }
|
---|
667 | }
|
---|
668 |
|
---|
669 | /**
|
---|
670 | * Linked-list Iterator
|
---|
671 | *
|
---|
672 | * Returns children in order and allows for list to change during iteration,
|
---|
673 | * provided the changes occur to or after the current element
|
---|
674 | *
|
---|
675 | * @access private
|
---|
676 | * @package dompdf
|
---|
677 | */
|
---|
678 | class FrameListIterator implements Iterator {
|
---|
679 |
|
---|
680 | protected $_parent;
|
---|
681 | protected $_cur;
|
---|
682 | protected $_num;
|
---|
683 |
|
---|
684 | function __construct(Frame $frame) {
|
---|
685 | $this->_parent = $frame;
|
---|
686 | $this->_cur = $frame->get_first_child();
|
---|
687 | $this->_num = 0;
|
---|
688 | }
|
---|
689 |
|
---|
690 | function rewind() {
|
---|
691 | $this->_cur = $this->_parent->get_first_child();
|
---|
692 | $this->_num = 0;
|
---|
693 | }
|
---|
694 |
|
---|
695 | function valid() {
|
---|
696 | return isset($this->_cur);// && ($this->_cur->get_prev_sibling() === $this->_prev);
|
---|
697 | }
|
---|
698 | function key() { return $this->_num; }
|
---|
699 | function current() { return $this->_cur; }
|
---|
700 |
|
---|
701 | function next() {
|
---|
702 |
|
---|
703 | $ret = $this->_cur;
|
---|
704 | if ( !$ret )
|
---|
705 | return null;
|
---|
706 |
|
---|
707 | $this->_cur = $this->_cur->get_next_sibling();
|
---|
708 | $this->_num++;
|
---|
709 | return $ret;
|
---|
710 | }
|
---|
711 | }
|
---|
712 |
|
---|
713 | //------------------------------------------------------------------------
|
---|
714 |
|
---|
715 | /**
|
---|
716 | * Pre-order IteratorAggregate
|
---|
717 | *
|
---|
718 | * @access private
|
---|
719 | * @package dompdf
|
---|
720 | */
|
---|
721 | class FrameTreeList implements IteratorAggregate {
|
---|
722 |
|
---|
723 | protected $_root;
|
---|
724 | function __construct(Frame $root) { $this->_root = $root; }
|
---|
725 | function getIterator() { return new FrameTreeIterator($this->_root); }
|
---|
726 |
|
---|
727 | }
|
---|
728 |
|
---|
729 | /**
|
---|
730 | * Pre-order Iterator
|
---|
731 | *
|
---|
732 | * Returns frames in preorder traversal order (parent then children)
|
---|
733 | *
|
---|
734 | * @access private
|
---|
735 | * @package dompdf
|
---|
736 | */
|
---|
737 | class FrameTreeIterator implements Iterator {
|
---|
738 |
|
---|
739 | protected $_root;
|
---|
740 | protected $_stack = array();
|
---|
741 | protected $_num;
|
---|
742 |
|
---|
743 | function __construct(Frame $root) {
|
---|
744 | $this->_stack[] = $this->_root = $root;
|
---|
745 | $this->_num = 0;
|
---|
746 | }
|
---|
747 |
|
---|
748 | function rewind() {
|
---|
749 | $this->_stack = array($this->_root);
|
---|
750 | $this->_num = 0;
|
---|
751 | }
|
---|
752 |
|
---|
753 | function valid() { return count($this->_stack) > 0; }
|
---|
754 | function key() { return $this->_num; }
|
---|
755 | function current() { return end($this->_stack); }
|
---|
756 |
|
---|
757 | function next() {
|
---|
758 | $b = end($this->_stack);
|
---|
759 |
|
---|
760 | // Pop last element
|
---|
761 | unset($this->_stack[ key($this->_stack) ]);
|
---|
762 | $this->_num++;
|
---|
763 |
|
---|
764 | // Push all children onto the stack in reverse order
|
---|
765 | if ( $c = $b->get_last_child() ) {
|
---|
766 | $this->_stack[] = $c;
|
---|
767 | while ( $c = $c->get_prev_sibling() )
|
---|
768 | $this->_stack[] = $c;
|
---|
769 | }
|
---|
770 | return $b;
|
---|
771 | }
|
---|
772 | }
|
---|
773 |
|
---|
774 | ?> |
---|