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: page_frame_reflower.cls.php,v $ |
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6 | * Created on: 2004-06-16 |
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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: page_frame_reflower.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 | * Reflows pages |
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44 | * |
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45 | * @access private |
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46 | * @package dompdf |
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47 | */ |
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48 | class Page_Frame_Reflower extends Frame_Reflower { |
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49 | |
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50 | /** |
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51 | * Cache of the callbacks array |
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52 | * |
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53 | * @var array |
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54 | */ |
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55 | private $_callbacks; |
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56 | |
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57 | /** |
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58 | * Cache of the canvas |
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59 | * |
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60 | * @var Canvas |
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61 | */ |
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62 | private $_canvas; |
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63 | |
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64 | function __construct(Page_Frame_Decorator $frame) { parent::__construct($frame); } |
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65 | |
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66 | //........................................................................ |
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67 | |
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68 | function reflow() { |
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69 | $style = $this->_frame->get_style(); |
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70 | |
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71 | // Paged layout: |
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72 | // http://www.w3.org/TR/CSS21/page.html |
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73 | |
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74 | // Pages are only concerned with margins |
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75 | $cb = $this->_frame->get_containing_block(); |
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76 | $left = $style->length_in_pt($style->margin_left, $cb["w"]); |
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77 | $right = $style->length_in_pt($style->margin_right, $cb["w"]); |
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78 | $top = $style->length_in_pt($style->margin_top, $cb["w"]); |
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79 | $bottom = $style->length_in_pt($style->margin_bottom, $cb["w"]); |
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80 | |
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81 | $content_x = $cb["x"] + $left; |
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82 | $content_y = $cb["y"] + $top; |
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83 | $content_width = $cb["w"] - $left - $right; |
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84 | $content_height = $cb["h"] - $top - $bottom; |
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85 | |
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86 | $prev_child = null; |
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87 | $child = $this->_frame->get_first_child(); |
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88 | |
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89 | while ($child) { |
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90 | |
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91 | $child->set_containing_block($content_x, $content_y, $content_width, $content_height); |
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92 | |
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93 | // Check for begin reflow callback |
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94 | $this->_check_callbacks("begin_page_reflow", $child); |
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95 | |
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96 | $child->reflow(); |
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97 | $next_child = $child->get_next_sibling(); |
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98 | |
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99 | // Check for begin render callback |
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100 | $this->_check_callbacks("begin_page_render", $child); |
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101 | |
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102 | // Render the page |
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103 | $this->_frame->get_renderer()->render($child); |
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104 | |
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105 | // Check for end render callback |
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106 | $this->_check_callbacks("end_page_render", $child); |
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107 | |
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108 | if ( $next_child ) |
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109 | { |
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110 | $this->_frame->next_page(); |
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111 | } |
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112 | |
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113 | // Wait to dispose of all frames on the previous page |
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114 | // so callback will have access to them |
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115 | if ( $prev_child ) |
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116 | { |
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117 | $prev_child->dispose(true); |
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118 | } |
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119 | $prev_child = $child; |
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120 | $child = $next_child; |
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121 | } |
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122 | |
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123 | // Dispose of previous page if it still exists |
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124 | if ( $prev_child ) |
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125 | { |
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126 | $prev_child->dispose(true); |
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127 | } |
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128 | } |
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129 | |
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130 | //........................................................................ |
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131 | |
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132 | /** |
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133 | * Check for callbacks that need to be performed when a given event |
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134 | * gets triggered on a page |
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135 | * |
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136 | * @param string $event the type of event |
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137 | * @param Frame $frame the frame that event is triggered on |
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138 | */ |
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139 | protected function _check_callbacks($event, $frame) { |
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140 | if (!isset($this->_callbacks)) { |
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141 | $dompdf = $this->_frame->get_dompdf(); |
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142 | $this->_callbacks = $dompdf->get_callbacks(); |
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143 | $this->_canvas = $dompdf->get_canvas(); |
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144 | } |
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145 | |
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146 | if (is_array($this->_callbacks) && isset($this->_callbacks[$event])) { |
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147 | $info = array(0 => $this->_canvas, "canvas" => $this->_canvas, |
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148 | 1 => $frame, "frame" => $frame); |
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149 | $fs = $this->_callbacks[$event]; |
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150 | foreach ($fs as $f) { |
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151 | if (is_callable($f)) { |
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152 | if (is_array($f)) { |
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153 | $f[0]->$f[1]($info); |
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154 | } else { |
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155 | $f($info); |
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156 | } |
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157 | } |
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158 | } |
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159 | } |
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160 | } |
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161 | } |
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162 | ?> |
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