1 | <?php |
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2 | |
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3 | /****************************************************************************** |
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4 | * |
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5 | * Filename: XMP.php |
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6 | * |
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7 | * Description: Provides functions for reading and writing information to/from |
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8 | * the 'App 1' Extensible Metadata Platform (XMP) segment of JPEG |
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9 | * format files. This XMP segment is XML based and contains the |
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10 | * Resource Description Framework (RDF) data, which itself can |
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11 | * contain the Dublin Core Metadata Initiative (DCMI) information. |
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12 | * |
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13 | * Author: Evan Hunter |
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14 | * |
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15 | * Date: 27/7/2004 |
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16 | * |
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17 | * Project: JPEG Metadata |
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18 | * |
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19 | * Revision: 1.10 |
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20 | * |
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21 | * Changes: 1.00 -> 1.04 : changed put_IPTC to fix a bug preventing the correct |
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22 | * insertion of a XMP block where none existed previously |
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23 | * |
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24 | * 1.04 -> 1.10 : changed put_XMP_text to fix some array indexes which were missing qoutes |
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25 | * |
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26 | * URL: http://electronics.ozhiker.com |
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27 | * |
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28 | * Copyright: Copyright " . $auteur . " 2004 |
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29 | * |
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30 | * License: This file is part of the PHP JPEG Metadata Toolkit. |
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31 | * |
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32 | * The PHP JPEG Metadata Toolkit is free software; you can |
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33 | * redistribute it and/or modify it under the terms of the |
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34 | * GNU General Public License as published by the Free Software |
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35 | * Foundation; either version 2 of the License, or (at your |
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36 | * option) any later version. |
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37 | * |
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38 | * The PHP JPEG Metadata Toolkit is distributed in the hope |
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39 | * that it will be useful, but WITHOUT ANY WARRANTY; without |
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40 | * even the implied warranty of MERCHANTABILITY or FITNESS |
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41 | * FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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42 | * for more details. |
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43 | * |
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44 | * You should have received a copy of the GNU General Public |
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45 | * License along with the PHP JPEG Metadata Toolkit; if not, |
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46 | * write to the Free Software Foundation, Inc., 59 Temple |
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47 | * Place, Suite 330, Boston, MA 02111-1307 USA |
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48 | * |
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49 | * If you require a different license for commercial or other |
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50 | * purposes, please contact the author: evan@ozhiker.com |
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51 | * |
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52 | ******************************************************************************/ |
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53 | |
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54 | include_once INCLUDE_PATH.'XML.php'; |
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55 | |
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56 | |
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57 | |
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58 | |
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59 | |
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60 | /****************************************************************************** |
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61 | * |
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62 | * Function: get_XMP_text |
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63 | * |
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64 | * Description: Retrieves the Extensible Metadata Platform (XMP) information |
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65 | * from an App1 JPEG segment and returns the raw XML text as a |
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66 | * string. This includes the Resource Description Framework (RDF) |
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67 | * information and may include Dublin Core Metadata Initiative (DCMI) |
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68 | * information. Uses information supplied by the get_jpeg_header_data |
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69 | * function |
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70 | * |
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71 | * Parameters: jpeg_header_data - a JPEG header data array in the same format |
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72 | * as from get_jpeg_header_data |
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73 | * |
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74 | * Returns: xmp_data - the string of raw XML text |
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75 | * FALSE - if an APP 1 XMP segment could not be found, |
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76 | * or if an error occured |
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77 | * |
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78 | ******************************************************************************/ |
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79 | |
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80 | function get_XMP_text( $jpeg_header_data ) |
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81 | { |
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82 | //Cycle through the header segments |
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83 | for( $i = 0; $i < count( $jpeg_header_data ); $i++ ) |
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84 | { |
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85 | // If we find an APP1 header, |
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86 | if ( strcmp ( $jpeg_header_data[$i]['SegName'], "APP1" ) == 0 ) |
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87 | { |
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88 | // And if it has the Adobe XMP/RDF label (http://ns.adobe.com/xap/1.0/\x00) , |
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89 | if( strncmp ( $jpeg_header_data[$i]['SegData'], "http://ns.adobe.com/xap/1.0/\x00", 29) == 0 ) |
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90 | { |
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91 | // Found a XMP/RDF block |
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92 | // Return the XMP text |
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93 | $xmp_data = substr ( $jpeg_header_data[$i]['SegData'], 29 ); |
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94 | |
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95 | return $xmp_data; |
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96 | } |
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97 | } |
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98 | } |
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99 | return FALSE; |
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100 | } |
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101 | |
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102 | /****************************************************************************** |
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103 | * End of Function: get_XMP_text |
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104 | ******************************************************************************/ |
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105 | |
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106 | |
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107 | |
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108 | |
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109 | |
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110 | |
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111 | /****************************************************************************** |
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112 | * |
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113 | * Function: put_XMP_text |
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114 | * |
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115 | * Description: Adds or modifies the Extensible Metadata Platform (XMP) information |
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116 | * in an App1 JPEG segment. If a XMP segment already exists, it is |
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117 | * replaced, otherwise a new one is inserted, using the supplied data. |
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118 | * Uses information supplied by the get_jpeg_header_data function |
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119 | * |
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120 | * Parameters: jpeg_header_data - a JPEG header data array in the same format |
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121 | * as from get_jpeg_header_data |
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122 | * newXMP - a string containing the XMP text to be stored in the XMP |
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123 | * segment. Should be constructed using the write_XMP_array_to_text |
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124 | * function |
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125 | * |
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126 | * Returns: jpeg_header_data - the JPEG header data array with the |
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127 | * XMP segment added. |
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128 | * FALSE - if an error occured |
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129 | * |
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130 | ******************************************************************************/ |
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131 | |
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132 | function put_XMP_text( $jpeg_header_data, $newXMP ) |
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133 | { |
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134 | //Cycle through the header segments |
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135 | for( $i = 0; $i < count( $jpeg_header_data ); $i++ ) |
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136 | { |
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137 | // If we find an APP1 header, |
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138 | if ( strcmp ( $jpeg_header_data[$i]['SegName'], "APP1" ) == 0 ) |
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139 | { |
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140 | // And if it has the Adobe XMP/RDF label (http://ns.adobe.com/xap/1.0/\x00) , |
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141 | if( strncmp ( $jpeg_header_data[$i]['SegData'], "http://ns.adobe.com/xap/1.0/\x00", 29) == 0 ) |
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142 | { |
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143 | // Found a preexisting XMP/RDF block - Replace it with the new one and return. |
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144 | $jpeg_header_data[$i]['SegData'] = "http://ns.adobe.com/xap/1.0/\x00" . $newXMP; |
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145 | return $jpeg_header_data; |
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146 | } |
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147 | } |
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148 | } |
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149 | |
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150 | // No pre-existing XMP/RDF found - insert a new one after any pre-existing APP0 or APP1 blocks |
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151 | // Change: changed to initialise $i properly as of revision 1.04 |
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152 | $i = 0; |
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153 | // Loop until a block is found that isn't an APP0 or APP1 |
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154 | while ( ( $jpeg_header_data[$i]['SegName'] == "APP0" ) || ( $jpeg_header_data[$i]['SegName'] == "APP1" ) ) |
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155 | { |
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156 | $i++; |
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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 | // Insert a new XMP/RDF APP1 segment at the specified point. |
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162 | // Change: changed to properly construct array element as of revision 1.04 - requires two array statements not one, requires insertion at $i, not $i - 1 |
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163 | array_splice($jpeg_header_data, $i, 0, array( array( "SegType" => 0xE1, |
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164 | "SegName" => "APP1", |
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165 | "SegDesc" => $GLOBALS[ "JPEG_Segment_Descriptions" ][ 0xE1 ], |
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166 | "SegData" => "http://ns.adobe.com/xap/1.0/\x00" . $newXMP ) ) ); |
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167 | |
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168 | // Return the headers with the new segment inserted |
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169 | return $jpeg_header_data; |
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170 | } |
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171 | |
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172 | /****************************************************************************** |
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173 | * End of Function: put_XMP_text |
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174 | ******************************************************************************/ |
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175 | |
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176 | |
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177 | |
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178 | |
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179 | |
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180 | |
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181 | /****************************************************************************** |
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182 | * |
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183 | * Function: read_XMP_array_from_text |
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184 | * |
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185 | * Description: An alias for read_xml_array_from_text. |
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186 | * Parses a string containing XMP data (XML), and returns the resulting |
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187 | * tree structure array, which contains all the XMP (XML) information. |
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188 | * Note: White space and comments in the XMP data (XML) are ignored |
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189 | * Note: All text information contained in the tree structure |
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190 | * is encoded as Unicode UTF-8. Hence text will appear as |
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191 | * normal ASCII except where there is an extended character. |
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192 | * |
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193 | * Parameters: xmptext - a string containing the XMP data (XML) to be parsed |
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194 | * |
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195 | * Returns: output - the tree structure array containing the XMP (XML) information |
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196 | * FALSE - if an error occured |
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197 | * |
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198 | ******************************************************************************/ |
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199 | |
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200 | function read_XMP_array_from_text( $xmptext ) |
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201 | { |
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202 | return read_xml_array_from_text( $xmptext ); |
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203 | } |
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204 | |
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205 | /****************************************************************************** |
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206 | * End of Function: read_XMP_array_from_text |
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207 | ******************************************************************************/ |
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208 | |
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209 | |
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210 | |
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211 | |
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212 | |
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213 | /****************************************************************************** |
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214 | * |
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215 | * Function: write_XMP_array_to_text |
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216 | * |
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217 | * Description: Takes a tree structure array containing XMP (in the same format |
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218 | * as returned by read_XMP_array_from_text, and constructs a string |
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219 | * containing the equivalent XMP, including the XMP Packet header |
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220 | * and trailer. Produces XMP text which has correct indents, encoded |
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221 | * using UTF-8. |
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222 | * Note: All text information contained in the tree structure |
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223 | * can be either 7-bit ASCII or encoded as Unicode UTF-8, |
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224 | * since UTF-8 passes 7-bit ASCII text unchanged. |
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225 | * |
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226 | * Parameters: xmparray - the tree structure array containing the information to |
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227 | * be converted to XMP text |
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228 | * |
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229 | * Returns: output_XMP_text - the string containing the equivalent XMP text |
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230 | * |
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231 | ******************************************************************************/ |
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232 | |
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233 | function write_XMP_array_to_text( $xmparray ) |
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234 | { |
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235 | // Add the XMP packet header |
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236 | // The sequence 0xEFBBBF is the UTF-8 encoded version of the Unicode zero |
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237 | // width non-breaking space character (U+FEFF), which is used for detecting |
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238 | // whether UTF-16 or UTF-8 is being used. |
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239 | $output_XMP_text = "<?xpacket begin='\xef\xbb\xbf' id='W5M0MpCehiHzreSzNTczkc9d'?>\n"; |
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240 | |
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241 | // Photoshop Seems to add this, but there doesn't appear to be |
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242 | // any information on what it means |
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243 | // TODO : XMP, Find out what the adobe-xap-filters tag means |
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244 | $output_XMP_text .= "<?adobe-xap-filters esc=\"CR\"?>\n"; |
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245 | |
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246 | // Add the XML text |
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247 | $output_XMP_text .= write_xml_array_to_text( $xmparray, 0 ); |
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248 | |
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249 | |
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250 | // The XMP standard recommends adding 2-4k of white space at the |
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251 | // end for in place editing, so we will add it to the XML now |
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252 | $output_XMP_text .= str_repeat(" \n", 30); |
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253 | |
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254 | // Add the XMP packet trailer |
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255 | $output_XMP_text .= "<?xpacket end='w'?>"; |
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256 | |
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257 | // Return the resulting XMP text |
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258 | return $output_XMP_text; |
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259 | } |
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260 | |
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261 | /****************************************************************************** |
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262 | * End of Function: write_XMP_array_to_text |
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263 | ******************************************************************************/ |
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264 | |
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265 | |
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266 | |
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267 | |
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268 | |
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269 | |
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270 | /****************************************************************************** |
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271 | * |
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272 | * Function: Interpret_XMP_to_HTML |
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273 | * |
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274 | * Description: Generates html showing the information contained in an Extensible |
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275 | * Metadata Platform (XMP) tree structure array, as retrieved |
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276 | * with read_XMP_array_from_text |
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277 | * |
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278 | * Parameters: XMP_array - a XMP tree structure array as from read_XMP_array_from_text |
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279 | * |
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280 | * Returns: output - the HTML string |
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281 | * |
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282 | ******************************************************************************/ |
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283 | |
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284 | function Interpret_XMP_to_HTML( $XMP_array ) |
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285 | { |
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286 | // Create a string to receive the output html |
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287 | $output =""; |
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288 | |
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289 | // Check if the XMP tree structure array is valid |
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290 | if ( $XMP_array !== FALSE ) |
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291 | { |
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292 | // Check if there is a rdf:RDF tag at either the first or second level |
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293 | if ( ( $XMP_array[0]['tag'] == "x:xapmeta" ) && ( $XMP_array[0]['children'][0]['tag'] == "rdf:RDF" ) ) |
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294 | { |
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295 | // RDF found at second level - Save it's position |
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296 | $RDF_Contents = &$XMP_array[0]['children'][0]['children']; |
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297 | } |
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298 | else if ( ( $XMP_array[0]['tag'] == "x:xmpmeta" ) && ( $XMP_array[0]['children'][0]['tag'] == "rdf:RDF" ) ) |
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299 | { |
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300 | // RDF found at second level - Save it's position |
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301 | $RDF_Contents = &$XMP_array[0]['children'][0]['children']; |
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302 | } |
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303 | else if ( $XMP_array[0]['tag'] == "rdf:RDF" ) |
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304 | { |
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305 | // RDF found at first level - Save it's position |
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306 | $RDF_Contents = &$XMP_array[0]['children']; |
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307 | } |
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308 | else |
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309 | { |
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310 | // RDF section not found - abort |
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311 | return ""; |
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312 | } |
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313 | |
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314 | // Add heading to html output |
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315 | $output .= "<fieldset><legend>Contains Extensible Metadata Platform (XMP) / Resource Description Framework (RDF) Information</legend>"; |
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316 | |
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317 | // Cycle through each of the items in the RDF tree array, and process them |
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318 | foreach ($RDF_Contents as $RDF_Item) |
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319 | { |
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320 | // Check if the item is a rdf:Description tag - these are the only ones that can be processed |
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321 | |
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322 | if ( ( $RDF_Item['tag'] == "rdf:Description" ) && ( array_key_exists( 'children', $RDF_Item ) ) ) |
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323 | { |
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324 | // Item is a rdf:Description tag. |
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325 | |
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326 | // Cycle through each of the attributes for this tag, looking |
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327 | // for a xmlns: attribute, which tells us what Namespace the |
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328 | // sub-items will be in. |
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329 | foreach( $RDF_Item['attributes'] as $key => $val ) |
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330 | { |
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331 | // Check for the xmlns: namespace attribute |
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332 | if ( substr( $key,0,6) == "xmlns:" ) |
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333 | { |
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334 | // Found a xmlns: attribute |
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335 | // Extract the namespace string |
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336 | // Add heading to the HTML according to which Namespace the RDF items have |
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337 | switch ( substr( $key,6) ) |
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338 | { |
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339 | case "photoshop": |
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340 | $entete = "Photoshop RDF Segment"; |
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341 | break; |
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342 | case "xapBJ": |
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343 | $entete = "Basic Job Ticket RDF Segment"; |
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344 | break; |
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345 | case "xapMM": |
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346 | $entete = "Media Management RDF Segment"; |
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347 | break; |
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348 | case "xapRights": |
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349 | $entete = "Rights Management RDF Segment"; |
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350 | break; |
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351 | case "dc": |
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352 | $entete = "Dublin Core Metadata Initiative RDF Segment"; |
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353 | break; |
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354 | case "xmp": |
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355 | case "xap": |
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356 | $entete = "XMP Basic Segment"; |
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357 | break; |
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358 | case "xmpTPg": |
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359 | $entete = "XMP Paged-Text Segment"; |
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360 | break; |
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361 | case "xmpTPg": |
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362 | $entete = "Adobe PDF Segment"; |
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363 | break; |
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364 | case "tiff": |
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365 | $entete = "XMP - embedded TIFF Segment"; |
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366 | break; |
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367 | case "exif": |
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368 | $entete = "XMP - embedded EXIF Segment"; |
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369 | break; |
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370 | case "xapGImg": // Sub Category - Do nothing |
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371 | break; |
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372 | case "stDim": // Sub Category - Do nothing |
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373 | break; |
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374 | case "stEvt": // Sub Category - Do nothing |
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375 | break; |
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376 | case "stRef": // Sub Category - Do nothing |
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377 | break; |
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378 | case "stVer": // Sub Category - Do nothing |
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379 | break; |
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380 | case "stJob": // Sub Category - Do nothing |
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381 | break; |
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382 | |
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383 | default: |
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384 | $entete = "Unknown RDF Segment '" . substr( $key,6) . "'"; |
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385 | break; |
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386 | } |
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387 | } |
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388 | } |
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389 | $output .= "<fieldset class='fieldset' id='". substr( $key,6) ."' ><legend> $entete </legend>"; |
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390 | // Add the start of the table to the HTML output |
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391 | $output .= "\n<table class=\"XMP_Table\" border=1>\n"; |
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392 | // Check if this element has sub-items |
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393 | $tabval=$RDF_Item; |
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394 | $tabval['Type_src']="xmp"; |
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395 | if ( array_key_exists( 'children', $RDF_Item ) ) |
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396 | { |
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397 | // Cycle through each of the sub-items |
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398 | foreach( $RDF_Item['children'] as $child_item ) |
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399 | { // Get an interpretation of the sub-item's caption and value |
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400 | list($tag_caption, $value_str) = Interpret_RDF_Item( $child_item ); |
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401 | // Escape the text of the caption for html |
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402 | $tag_caption = HTML_UTF8_Escape( $tag_caption ); |
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403 | // Escape the text of the value for html and turn newlines to <br> |
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404 | $value_str = nl2br( HTML_UTF8_Escape( $value_str ) ); |
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405 | |
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406 | // Check if the value is empty - if it is, put a no-break-space in |
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407 | // to ensure the table cell gets drawn |
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408 | if ( $value_str == "" ) |
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409 | { |
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410 | $value_str = " "; |
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411 | } |
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412 | // Add the table row to the output html |
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413 | |
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414 | $tabval['Tag Name']=$tag_caption; |
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415 | $tabval['Text Value']=$value_str ; |
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416 | $output .= OutPut_exif($tabval); |
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417 | } |
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418 | } |
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419 | |
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420 | // Add the end of the table to the html |
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421 | $output .= "</table></fieldset>"; |
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422 | |
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423 | |
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424 | } |
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425 | else |
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426 | { |
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427 | // Don't know how to process tags other than rdf:Description - do nothing |
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428 | } |
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429 | } |
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430 | |
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431 | |
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432 | |
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433 | } |
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434 | // Return the resulting HTML |
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435 | return $output."</fieldset>"; |
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436 | } |
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437 | |
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438 | /****************************************************************************** |
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439 | * End of Function: Interpret_XMP_to_HTML |
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440 | ******************************************************************************/ |
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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 | |
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446 | |
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447 | |
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448 | |
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449 | |
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450 | |
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451 | |
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452 | |
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453 | |
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454 | |
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455 | |
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456 | |
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457 | |
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458 | |
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459 | /****************************************************************************** |
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460 | * |
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461 | * INTERNAL FUNCTIONS |
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462 | * |
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463 | ******************************************************************************/ |
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464 | |
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465 | |
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466 | |
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467 | |
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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 | |
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473 | |
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474 | |
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475 | |
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476 | /****************************************************************************** |
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477 | * |
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478 | * Internal Function: Interpret_RDF_Item |
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479 | * |
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480 | * Description: Used by Interpret_XMP_to_HTML |
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481 | * Used by get_RDF_field_html_value |
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482 | * Used by interpret_RDF_collection |
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483 | * Generates a caption and text representation of the value of a |
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484 | * particular RDF item. |
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485 | * |
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486 | * Parameters: Item - The RDF item to evaluate |
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487 | * |
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488 | * Returns: tag_caption - the caption of the tag |
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489 | * value_str - the text representation of the value |
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490 | * |
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491 | ******************************************************************************/ |
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492 | |
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493 | function Interpret_RDF_Item( $Item ) |
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494 | { |
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495 | |
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496 | // TODO: Many RDF items have not been tested - only photoshop 7.0 and CS items |
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497 | |
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498 | // Create a string to receive the HTML output |
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499 | $value_str = ""; |
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500 | |
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501 | // Check if the item has is in the lookup table of tag captions |
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502 | if ( array_key_exists( $Item['tag'], $GLOBALS[ 'XMP_tag_captions' ] ) ) |
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503 | { |
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504 | // Item is in list of captions, get the caption |
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505 | $tag_caption = $GLOBALS[ 'XMP_tag_captions' ][ $Item['tag'] ]; |
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506 | } |
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507 | else |
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508 | { |
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509 | // Item has no caption - make one |
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510 | $tag_caption = "Unknown field " . $Item['tag']; |
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511 | } |
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512 | |
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513 | |
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514 | // Process specially the item according to it's tag |
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515 | switch ( $Item['tag'] ) |
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516 | { |
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517 | |
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518 | case "photoshop:DateCreated": // This is in year month day order |
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519 | // Extract the year,month and day |
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520 | list( $year, $month, $day ) = sscanf( $Item['value'], "%d-%d-%d" ); |
---|
521 | // Make a new date string with Day, Month, Year |
---|
522 | $value_str = "$day/$month/$year"; |
---|
523 | break; |
---|
524 | |
---|
525 | default : |
---|
526 | $value_str = get_RDF_field_html_value( $Item ); |
---|
527 | break; |
---|
528 | } |
---|
529 | |
---|
530 | |
---|
531 | |
---|
532 | |
---|
533 | // Return the captiona and value |
---|
534 | return array($tag_caption, $value_str); |
---|
535 | } |
---|
536 | |
---|
537 | |
---|
538 | /****************************************************************************** |
---|
539 | * End of Function: Interpret_RDF_Item |
---|
540 | ******************************************************************************/ |
---|
541 | |
---|
542 | |
---|
543 | |
---|
544 | |
---|
545 | |
---|
546 | /****************************************************************************** |
---|
547 | * |
---|
548 | * Internal Function: get_RDF_field_html_value |
---|
549 | * |
---|
550 | * Description: Attempts to build a text representation of the value of an RDF |
---|
551 | * item. This includes handling any collections or sub-resources. |
---|
552 | * |
---|
553 | * Parameters: rdf_item - The RDF item to evaluate |
---|
554 | * |
---|
555 | * Returns: output_str - the text representation of the field value |
---|
556 | * |
---|
557 | ******************************************************************************/ |
---|
558 | |
---|
559 | function get_RDF_field_html_value( $rdf_item ) |
---|
560 | { |
---|
561 | // Create a string to receive the output text |
---|
562 | $output_str = ""; |
---|
563 | |
---|
564 | // Check if the item has a value |
---|
565 | if ( array_key_exists( 'value', $rdf_item ) ) |
---|
566 | { |
---|
567 | // The item does have a value - add it to the text |
---|
568 | $output_str .= $rdf_item['value']; |
---|
569 | } |
---|
570 | |
---|
571 | // Check if the item has any attributes |
---|
572 | if ( array_key_exists( 'attributes', $rdf_item ) ) |
---|
573 | { |
---|
574 | // Cycle through each of the attributes |
---|
575 | foreach( $rdf_item['attributes'] as $key => $val ) |
---|
576 | { |
---|
577 | // Check if this attribute is rdf:parseType = 'Resource' i.e. a sub-resource indicator |
---|
578 | if ( ( $key == "rdf:parseType" ) && ( $val == "Resource" ) ) |
---|
579 | { |
---|
580 | // This item has a attribute indicating sub-resources |
---|
581 | // Check that the item has sub items |
---|
582 | if ( array_key_exists( 'children', $rdf_item ) ) |
---|
583 | { |
---|
584 | // The item does have sub-items, |
---|
585 | // Cycle through each, Interpreting them and adding the result to the output text |
---|
586 | foreach( $rdf_item['children'] as $child ) |
---|
587 | { |
---|
588 | list($tag_caption, $value_str) = Interpret_RDF_Item( $child ); |
---|
589 | $output_str .= "$tag_caption = $value_str\n"; |
---|
590 | } |
---|
591 | // The output text will have an extra \n on it - remove it |
---|
592 | $output_str = rtrim( $output_str ); |
---|
593 | } |
---|
594 | } |
---|
595 | } |
---|
596 | } |
---|
597 | // If the item did not have sub-resources, it may still have sub-items - check for this |
---|
598 | else if ( array_key_exists( 'children', $rdf_item ) ) |
---|
599 | { |
---|
600 | // Non-resource Sub-items found, Cycle through each |
---|
601 | foreach( $rdf_item['children'] as $child_item ) |
---|
602 | { |
---|
603 | // Check if this sub-item has a tag |
---|
604 | if ( array_key_exists( 'tag', $child_item ) ) |
---|
605 | { |
---|
606 | // Sub item has a tag, Process it according to the tag |
---|
607 | switch ( $child_item[ 'tag' ] ) |
---|
608 | { |
---|
609 | // Collections |
---|
610 | case "rdf:Alt": |
---|
611 | $output_str .= "List of Alternates:\n"; |
---|
612 | $output_str .= interpret_RDF_collection( $child_item ); |
---|
613 | break; |
---|
614 | |
---|
615 | case "rdf:Bag": |
---|
616 | $output_str .= "Unordered List:\n"; |
---|
617 | $output_str .= interpret_RDF_collection( $child_item ); |
---|
618 | break; |
---|
619 | |
---|
620 | case "rdf:Seq": |
---|
621 | $output_str .= "Ordered List:\n"; |
---|
622 | $output_str .= interpret_RDF_collection( $child_item ); |
---|
623 | break; |
---|
624 | |
---|
625 | // Sub-Resource |
---|
626 | case "rdf:Description": |
---|
627 | // Check that the item has sub items |
---|
628 | if ( array_key_exists( 'children', $child_item ) ) |
---|
629 | { |
---|
630 | // The item does have sub-items, |
---|
631 | // Cycle through each, Interpreting them and adding the result to the output text |
---|
632 | foreach( $child_item['children'] as $child ) |
---|
633 | { |
---|
634 | list($tag_caption, $value_str) = Interpret_RDF_Item( $child ); |
---|
635 | $output_str .= "$tag_caption = $value_str\n"; |
---|
636 | } |
---|
637 | // The output text will have an extra \n on it - remove it |
---|
638 | $output_str = rtrim( $output_str ); |
---|
639 | } |
---|
640 | break; |
---|
641 | |
---|
642 | // Other |
---|
643 | default: |
---|
644 | $output_str .= "Unknown Sub Item type:". $child_item[ 'tag' ]. "\n"; |
---|
645 | break; |
---|
646 | } |
---|
647 | } // sub-item Has no tags, look for a value |
---|
648 | else if ( array_key_exists( 'value', $child_item ) ) |
---|
649 | { |
---|
650 | $output_str .= $rdf_item['value'] . "\n"; |
---|
651 | } |
---|
652 | else |
---|
653 | { |
---|
654 | // no info - do nothing |
---|
655 | } |
---|
656 | |
---|
657 | } |
---|
658 | } |
---|
659 | |
---|
660 | // return the resulting value string |
---|
661 | return $output_str; |
---|
662 | } |
---|
663 | |
---|
664 | /****************************************************************************** |
---|
665 | * End of Function: get_RDF_field_html_value |
---|
666 | ******************************************************************************/ |
---|
667 | |
---|
668 | |
---|
669 | |
---|
670 | |
---|
671 | |
---|
672 | |
---|
673 | |
---|
674 | |
---|
675 | /****************************************************************************** |
---|
676 | * |
---|
677 | * Internal Function: interpret_RDF_collection |
---|
678 | * |
---|
679 | * Description: Attempts to build a text representation of the value of an RDF |
---|
680 | * collection item. This includes handling any sub-collections or |
---|
681 | * sub-resources. |
---|
682 | * |
---|
683 | * Parameters: rdf_item - The RDF collection item to evaluate |
---|
684 | * |
---|
685 | * Returns: output_str - the text representation of the collection value |
---|
686 | * |
---|
687 | ******************************************************************************/ |
---|
688 | |
---|
689 | function interpret_RDF_collection( $item ) |
---|
690 | { |
---|
691 | // Create a string to receive the output |
---|
692 | $output_str = ""; |
---|
693 | |
---|
694 | // Check if the collection item has sub-items |
---|
695 | if ( array_key_exists( 'children', $item ) ) |
---|
696 | { |
---|
697 | |
---|
698 | // Cycle through each of the sub-items |
---|
699 | foreach( $item['children'] as $list_item ) |
---|
700 | { |
---|
701 | // Check that the sub item has a tag, and don't process it if it doesn't |
---|
702 | if ( ! array_key_exists( 'tag', $list_item ) ) |
---|
703 | { |
---|
704 | continue 1; |
---|
705 | } |
---|
706 | |
---|
707 | // Check that the sub-item tag is either rdf:li or rdf:_1 .... |
---|
708 | // This signifies it is a list item of the collection |
---|
709 | if ( ( $list_item['tag'] == "rdf:li" ) || |
---|
710 | ( preg_match ( "rdf:_\d+", $list_item['tag'] ) == 1 ) ) |
---|
711 | { |
---|
712 | // A List item has been found |
---|
713 | // Check if there are sub-resources, |
---|
714 | // starting by checking if there are attributes |
---|
715 | if ( array_key_exists( 'attributes', $list_item ) ) |
---|
716 | { |
---|
717 | // Cycle through each of the attributes |
---|
718 | foreach( $list_item['attributes'] as $key => $val ) |
---|
719 | { |
---|
720 | // Check if this attribute is rdf:parseType = 'Resource' i.e. a sub-resource indicator |
---|
721 | if ( ( $key == "rdf:parseType" ) && ( $val == "Resource" ) ) |
---|
722 | { |
---|
723 | // This item has a attribute indicating sub-resources |
---|
724 | // Check that the item has sub items |
---|
725 | if ( array_key_exists( 'children', $list_item ) ) |
---|
726 | { |
---|
727 | // The item does have sub-items, |
---|
728 | // Cycle through each, Interpreting them and adding the result to the output text |
---|
729 | foreach( $list_item['children'] as $child ) |
---|
730 | { |
---|
731 | list($tag_caption, $value_str) = Interpret_RDF_Item( $child ); |
---|
732 | $output_str .= "$tag_caption = $value_str\n"; |
---|
733 | } |
---|
734 | // The output text will have an extra \n on it - remove it |
---|
735 | $output_str = rtrim( $output_str ); |
---|
736 | } |
---|
737 | } |
---|
738 | } |
---|
739 | } |
---|
740 | |
---|
741 | // Check if the list item has a value |
---|
742 | if ( array_key_exists( 'value', $list_item ) ) |
---|
743 | { |
---|
744 | // Value found, add it to the output |
---|
745 | $output_str .= get_RDF_field_html_value( $list_item ) . "\n"; |
---|
746 | } |
---|
747 | |
---|
748 | } |
---|
749 | } |
---|
750 | // The list of sub-items formed will have a trailing \n, remove it. |
---|
751 | $output_str = rtrim( $output_str ); |
---|
752 | |
---|
753 | } |
---|
754 | else |
---|
755 | { |
---|
756 | // No sub-items in collection - can't do anything |
---|
757 | } |
---|
758 | |
---|
759 | // Return the output value |
---|
760 | return $output_str; |
---|
761 | |
---|
762 | } |
---|
763 | |
---|
764 | /****************************************************************************** |
---|
765 | * End of Function: interpret_RDF_collection |
---|
766 | ******************************************************************************/ |
---|
767 | |
---|
768 | |
---|
769 | |
---|
770 | |
---|
771 | |
---|
772 | |
---|
773 | |
---|
774 | |
---|
775 | |
---|
776 | |
---|
777 | |
---|
778 | |
---|
779 | |
---|
780 | |
---|
781 | |
---|
782 | /****************************************************************************** |
---|
783 | * Global Variable: XMP_tag_captions |
---|
784 | * |
---|
785 | * Contents: The Captions of the known XMP fields, indexed by their field name |
---|
786 | * |
---|
787 | ******************************************************************************/ |
---|
788 | |
---|
789 | $GLOBALS[ 'XMP_tag_captions' ] = array ( |
---|
790 | |
---|
791 | "dc:contributor" => "Other Contributor(s)", |
---|
792 | "dc:coverage" => "Coverage (scope)", |
---|
793 | "dc:creator" => "Creator(s) (Authors)", |
---|
794 | "dc:date" => "Date", |
---|
795 | "dc:description" => "Description (Caption)", |
---|
796 | "dc:format" => "MIME Data Format", |
---|
797 | "dc:identifier" => "Unique Resource Identifer", |
---|
798 | "dc:language" => "Language(s)", |
---|
799 | "dc:publisher" => "Publisher(s)", |
---|
800 | "dc:relation" => "Relations to other documents", |
---|
801 | "dc:rights" => "Rights Statement", |
---|
802 | "dc:source" => "Source (from which this Resource is derived)", |
---|
803 | "dc:subject" => "Subject and Keywords", |
---|
804 | "dc:title" => "Title", |
---|
805 | "dc:type" => "Resource Type", |
---|
806 | |
---|
807 | "xmp:Advisory" => "Externally Editied Properties", |
---|
808 | "xmp:BaseURL" => "Base URL for relative URL's", |
---|
809 | "xmp:CreateDate" => "Original Creation Date", |
---|
810 | "xmp:CreatorTool" => "Creator Tool", |
---|
811 | "xmp:Identifier" => "Identifier(s)", |
---|
812 | "xmp:MetadataDate" => "Metadata Last Modify Date", |
---|
813 | "xmp:ModifyDate" => "Resource Last Modify Date", |
---|
814 | "xmp:Nickname" => "Nickname", |
---|
815 | "xmp:Thumbnails" => "Thumbnails", |
---|
816 | |
---|
817 | "xmpidq:Scheme" => "Identification Scheme", |
---|
818 | |
---|
819 | // These are not in spec but Photoshop CS seems to use them |
---|
820 | "xap:Advisory" => "Externally Editied Properties", |
---|
821 | "xap:BaseURL" => "Base URL for relative URL's", |
---|
822 | "xap:CreateDate" => "Original Creation Date", |
---|
823 | "xap:CreatorTool" => "Creator Tool", |
---|
824 | "xap:Identifier" => "Identifier(s)", |
---|
825 | "xap:MetadataDate" => "Metadata Last Modify Date", |
---|
826 | "xap:ModifyDate" => "Resource Last Modify Date", |
---|
827 | "xap:Nickname" => "Nickname", |
---|
828 | "xap:Thumbnails" => "Thumbnails", |
---|
829 | "xapidq:Scheme" => "Identification Scheme", |
---|
830 | |
---|
831 | |
---|
832 | "xapRights:Certificate" => "Certificate", |
---|
833 | "xapRights:Copyright" => "Copyright", |
---|
834 | "xapRights:Marked" => "Marked", |
---|
835 | "xapRights:Owner" => "Owner", |
---|
836 | "xapRights:UsageTerms" => "Legal Terms of Usage", |
---|
837 | "xapRights:WebStatement" => "Web Page describing rights statement (Owner URL)", |
---|
838 | |
---|
839 | "xapMM:ContainedResources" => "Contained Resources", |
---|
840 | "xapMM:ContributorResources" => "Contributor Resources", |
---|
841 | "xapMM:DerivedFrom" => "Derived From", |
---|
842 | "xapMM:DocumentID" => "Document ID", |
---|
843 | "xapMM:History" => "History", |
---|
844 | "xapMM:LastURL" => "Last Written URL", |
---|
845 | "xapMM:ManagedFrom" => "Managed From", |
---|
846 | "xapMM:Manager" => "Asset Management System", |
---|
847 | "xapMM:ManageTo" => "Manage To", |
---|
848 | "xapMM:xmpMM:ManageUI" => "Managed Resource URI", |
---|
849 | "xapMM:ManagerVariant" => "Particular Variant of Asset Management System", |
---|
850 | "xapMM:RenditionClass" => "Rendition Class", |
---|
851 | "xapMM:RenditionParams" => "Rendition Parameters", |
---|
852 | "xapMM:RenditionOf" => "Rendition Of", |
---|
853 | "xapMM:SaveID" => "Save ID", |
---|
854 | "xapMM:VersionID" => "Version ID", |
---|
855 | "xapMM:Versions" => "Versions", |
---|
856 | |
---|
857 | "xapBJ:JobRef" => "Job Reference", |
---|
858 | |
---|
859 | "xmpTPg:MaxPageSize" => "Largest Page Size", |
---|
860 | "xmpTPg:NPages" => "Number of pages", |
---|
861 | |
---|
862 | "pdf:Keywords" => "Keywords", |
---|
863 | "pdf:PDFVersion" => "PDF file version", |
---|
864 | "pdf:Producer" => "PDF Creation Tool", |
---|
865 | |
---|
866 | "photoshop:AuthorsPosition" => "Authors Position", |
---|
867 | "photoshop:CaptionWriter" => "Caption Writer", |
---|
868 | "photoshop:Category" => "Category", |
---|
869 | "photoshop:City" => "City", |
---|
870 | "photoshop:Country" => "Country", |
---|
871 | "photoshop:Credit" => "Credit", |
---|
872 | "photoshop:DateCreated" => "Creation Date", |
---|
873 | "photoshop:Headline" => "Headline", |
---|
874 | "photoshop:History" => "History", // Not in XMP spec |
---|
875 | "photoshop:Instructions" => "Instructions", |
---|
876 | "photoshop:Source" => "Source", |
---|
877 | "photoshop:State" => "State", |
---|
878 | "photoshop:SupplementalCategories" => "Supplemental Categories", |
---|
879 | "photoshop:TransmissionReference" => "Technical (Transmission) Reference", |
---|
880 | "photoshop:Urgency" => "Urgency", |
---|
881 | |
---|
882 | |
---|
883 | "tiff:ImageWidth" => "Image Width", |
---|
884 | "tiff:ImageLength" => "Image Length", |
---|
885 | "tiff:BitsPerSample" => "Bits Per Sample", |
---|
886 | "tiff:Compression" => "Compression", |
---|
887 | "tiff:PhotometricInterpretation" => "Photometric Interpretation", |
---|
888 | "tiff:Orientation" => "Orientation", |
---|
889 | "tiff:SamplesPerPixel" => "Samples Per Pixel", |
---|
890 | "tiff:PlanarConfiguration" => "Planar Configuration", |
---|
891 | "tiff:YCbCrSubSampling" => "YCbCr Sub-Sampling", |
---|
892 | "tiff:YCbCrPositioning" => "YCbCr Positioning", |
---|
893 | "tiff:XResolution" => "X Resolution", |
---|
894 | "tiff:YResolution" => "Y Resolution", |
---|
895 | "tiff:ResolutionUnit" => "Resolution Unit", |
---|
896 | "tiff:TransferFunction" => "Transfer Function", |
---|
897 | "tiff:WhitePoint" => "White Point", |
---|
898 | "tiff:PrimaryChromaticities" => "Primary Chromaticities", |
---|
899 | "tiff:YCbCrCoefficients" => "YCbCr Coefficients", |
---|
900 | "tiff:ReferenceBlackWhite" => "Black & White Reference", |
---|
901 | "tiff:DateTime" => "Date & Time", |
---|
902 | "tiff:ImageDescription" => "Image Description", |
---|
903 | "tiff:Make" => "Make", |
---|
904 | "tiff:Model" => "Model", |
---|
905 | "tiff:Software" => "Software", |
---|
906 | "tiff:Artist" => "Artist", |
---|
907 | "tiff:Copyright" => "Copyright", |
---|
908 | |
---|
909 | |
---|
910 | "exif:ExifVersion" => "Exif Version", |
---|
911 | "exif:FlashpixVersion" => "Flash pix Version", |
---|
912 | "exif:ColorSpace" => "Color Space", |
---|
913 | "exif:ComponentsConfiguration" => "Components Configuration", |
---|
914 | "exif:CompressedBitsPerPixel" => "Compressed Bits Per Pixel", |
---|
915 | "exif:PixelXDimension" => "Pixel X Dimension", |
---|
916 | "exif:PixelYDimension" => "Pixel Y Dimension", |
---|
917 | "exif:MakerNote" => "Maker Note", |
---|
918 | "exif:UserComment" => "User Comment", |
---|
919 | "exif:RelatedSoundFile" => "Related Sound File", |
---|
920 | "exif:DateTimeOriginal" => "Date & Time of Original", |
---|
921 | "exif:DateTimeDigitized" => "Date & Time Digitized", |
---|
922 | "exif:ExposureTime" => "Exposure Time", |
---|
923 | "exif:FNumber" => "F Number", |
---|
924 | "exif:ExposureProgram" => "Exposure Program", |
---|
925 | "exif:SpectralSensitivity" => "Spectral Sensitivity", |
---|
926 | "exif:ISOSpeedRatings" => "ISO Speed Ratings", |
---|
927 | "exif:OECF" => "Opto-Electronic Conversion Function", |
---|
928 | "exif:ShutterSpeedValue" => "Shutter Speed Value", |
---|
929 | "exif:ApertureValue" => "Aperture Value", |
---|
930 | "exif:BrightnessValue" => "Brightness Value", |
---|
931 | "exif:ExposureBiasValue" => "Exposure Bias Value", |
---|
932 | "exif:MaxApertureValue" => "Max Aperture Value", |
---|
933 | "exif:SubjectDistance" => "Subject Distance", |
---|
934 | "exif:MeteringMode" => "Metering Mode", |
---|
935 | "exif:LightSource" => "Light Source", |
---|
936 | "exif:Flash" => "Flash", |
---|
937 | "exif:FocalLength" => "Focal Length", |
---|
938 | "exif:SubjectArea" => "Subject Area", |
---|
939 | "exif:FlashEnergy" => "Flash Energy", |
---|
940 | "exif:SpatialFrequencyResponse" => "Spatial Frequency Response", |
---|
941 | "exif:FocalPlaneXResolution" => "Focal Plane X Resolution", |
---|
942 | "exif:FocalPlaneYResolution" => "Focal Plane Y Resolution", |
---|
943 | "exif:FocalPlaneResolutionUnit" => "Focal Plane Resolution Unit", |
---|
944 | "exif:SubjectLocation" => "Subject Location", |
---|
945 | "exif:SensingMethod" => "Sensing Method", |
---|
946 | "exif:FileSource" => "File Source", |
---|
947 | "exif:SceneType" => "Scene Type", |
---|
948 | "exif:CFAPattern" => "Colour Filter Array Pattern", |
---|
949 | "exif:CustomRendered" => "Custom Rendered", |
---|
950 | "exif:ExposureMode" => "Exposure Mode", |
---|
951 | "exif:WhiteBalance" => "White Balance", |
---|
952 | "exif:DigitalZoomRatio" => "Digital Zoom Ratio", |
---|
953 | "exif:FocalLengthIn35mmFilm" => "Focal Length In 35mm Film", |
---|
954 | "exif:SceneCaptureType" => "Scene Capture Type", |
---|
955 | "exif:GainControl" => "Gain Control", |
---|
956 | "exif:Contrast" => "Contrast", |
---|
957 | "exif:Saturation" => "Saturation", |
---|
958 | "exif:Sharpness" => "Sharpness", |
---|
959 | "exif:DeviceSettingDescription" => "Device Setting Description", |
---|
960 | "exif:SubjectDistanceRange" => "Subject Distance Range", |
---|
961 | "exif:ImageUniqueID" => "Image Unique ID", |
---|
962 | "exif:GPSVersionID" => "GPS Version ID", |
---|
963 | "exif:GPSLatitude" => "GPS Latitude", |
---|
964 | "exif:GPSLongitude" => "GPS Longitude", |
---|
965 | "exif:GPSAltitudeRef" => "GPS Altitude Reference", |
---|
966 | "exif:GPSAltitude" => "GPS Altitude", |
---|
967 | "exif:GPSTimeStamp" => "GPS Time Stamp", |
---|
968 | "exif:GPSSatellites" => "GPS Satellites", |
---|
969 | "exif:GPSStatus" => "GPS Status", |
---|
970 | "exif:GPSMeasureMode" => "GPS Measure Mode", |
---|
971 | "exif:GPSDOP" => "GPS Degree Of Precision", |
---|
972 | "exif:GPSSpeedRef" => "GPS Speed Reference", |
---|
973 | "exif:GPSSpeed" => "GPS Speed", |
---|
974 | "exif:GPSTrackRef" => "GPS Track Reference", |
---|
975 | "exif:GPSTrack" => "GPS Track", |
---|
976 | "exif:GPSImgDirectionRef" => "GPS Image Direction Reference", |
---|
977 | "exif:GPSImgDirection" => "GPS Image Direction", |
---|
978 | "exif:GPSMapDatum" => "GPS Map Datum", |
---|
979 | "exif:GPSDestLatitude" => "GPS Destination Latitude", |
---|
980 | "exif:GPSDestLongitude" => "GPS Destnation Longitude", |
---|
981 | "exif:GPSDestBearingRef" => "GPS Destination Bearing Reference", |
---|
982 | "exif:GPSDestBearing" => "GPS Destination Bearing", |
---|
983 | "exif:GPSDestDistanceRef" => "GPS Destination Distance Reference", |
---|
984 | "exif:GPSDestDistance" => "GPS Destination Distance", |
---|
985 | "exif:GPSProcessingMethod" => "GPS Processing Method", |
---|
986 | "exif:GPSAreaInformation" => "GPS Area Information", |
---|
987 | "exif:GPSDifferential" => "GPS Differential", |
---|
988 | |
---|
989 | "stDim:w" => "Width", |
---|
990 | "stDim:h" => "Height", |
---|
991 | "stDim:unit" => "Units", |
---|
992 | |
---|
993 | "xapGImg:height" => "Height", |
---|
994 | "xapGImg:width" => "Width", |
---|
995 | "xapGImg:format" => "Format", |
---|
996 | "xapGImg:image" => "Image", |
---|
997 | |
---|
998 | "stEvt:action" => "Action", |
---|
999 | "stEvt:instanceID" => "Instance ID", |
---|
1000 | "stEvt:parameters" => "Parameters", |
---|
1001 | "stEvt:softwareAgent" => "Software Agent", |
---|
1002 | "stEvt:when" => "When", |
---|
1003 | |
---|
1004 | "stRef:instanceID" => "Instance ID", |
---|
1005 | "stRef:documentID" => "Document ID", |
---|
1006 | "stRef:versionID" => "Version ID", |
---|
1007 | "stRef:renditionClass" => "Rendition Class", |
---|
1008 | "stRef:renditionParams" => "Rendition Parameters", |
---|
1009 | "stRef:manager" => "Asset Management System", |
---|
1010 | "stRef:managerVariant" => "Particular Variant of Asset Management System", |
---|
1011 | "stRef:manageTo" => "Manage To", |
---|
1012 | "stRef:manageUI" => "Managed Resource URI", |
---|
1013 | |
---|
1014 | "stVer:comments" => "", |
---|
1015 | "stVer:event" => "", |
---|
1016 | "stVer:modifyDate" => "", |
---|
1017 | "stVer:modifier" => "", |
---|
1018 | "stVer:version" => "", |
---|
1019 | |
---|
1020 | |
---|
1021 | |
---|
1022 | "stJob:name" => "Job Name", |
---|
1023 | "stJob:id" => "Unique Job ID", |
---|
1024 | "stJob:url" => "URL for External Job Management File", |
---|
1025 | |
---|
1026 | // Exif Flash |
---|
1027 | "exif:Fired" => "Fired", |
---|
1028 | "exif:Return" => "Return", |
---|
1029 | "exif:Mode" => "Mode", |
---|
1030 | "exif:Function" => "Function", |
---|
1031 | "exif:RedEyeMode" => "Red Eye Mode", |
---|
1032 | |
---|
1033 | // Exif OECF/SFR |
---|
1034 | "exif:Columns" => "Columns", |
---|
1035 | "exif:Rows" => "Rows", |
---|
1036 | "exif:Names" => "Names", |
---|
1037 | "exif:Values" => "Values", |
---|
1038 | |
---|
1039 | // Exif CFAPattern |
---|
1040 | "exif:Columns" => "Columns", |
---|
1041 | "exif:Rows" => "Rows", |
---|
1042 | "exif:Values" => "Values", |
---|
1043 | |
---|
1044 | |
---|
1045 | // Exif DeviceSettings |
---|
1046 | "exif:Columns" => "Columns", |
---|
1047 | "exif:Rows" => "Rows", |
---|
1048 | "exif:Settings" => "Settings", |
---|
1049 | |
---|
1050 | |
---|
1051 | |
---|
1052 | ); |
---|
1053 | |
---|
1054 | /****************************************************************************** |
---|
1055 | * End of Global Variable: XMP_tag_captions |
---|
1056 | ******************************************************************************/ |
---|
1057 | |
---|
1058 | |
---|
1059 | ?> |
---|