Mercurial > hg > digilib-old

annotate servlet/src/digilib/io/ImageFileset.java @ 357:e03b4d7a7b46

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better version of SVG Raster servlet
author robcast
date Tue, 06 Dec 2005 14:36:31 +0100
parents 7958035abec1
children ee2b943420f5
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1 /* ImageFileset -- digilib image file info class.
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2 * Digital Image Library servlet components
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3 * Copyright (C) 2003 Robert Casties (robcast@mail.berlios.de)
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4 *
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5 * This program is free software; you can
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6 * redistribute it and/or modify it under the terms of the GNU General Public
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7 * License as published by the Free Software Foundation; either version 2 of
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8 * the License, or (at your option) any later version.
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9 *
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10 * Please read license.txt for the full details. A copy of the GPL may be
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11 * found at http://www.gnu.org/copyleft/lgpl.html
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12 *
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13 * You should have received a copy of the GNU General Public License along
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14 * with this program; if not, write to the Free Software Foundation, Inc.,
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15 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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16 */
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17
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18 package digilib.io;
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19
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20 import java.io.File;
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21 import java.io.IOException;
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22 import java.util.ArrayList;
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23 import java.util.Arrays;
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24 import java.util.Iterator;
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25 import java.util.ListIterator;
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26 import java.util.Map;
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27
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28 import org.apache.log4j.Logger;
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29
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30 import digilib.image.ImageOps;
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31 import digilib.image.ImageSize;
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32
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33 /**
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34 * @author casties
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35 */
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36 public class ImageFileset extends DocuDirent {
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37
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38 /** this is an image file */
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39 protected static int fileClass = FileOps.CLASS_IMAGE;
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40
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41 /** logger for this class */
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42 private static Logger logger = Logger.getLogger(ImageFileset.class);
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43
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44 /** list of files (ImageFile) */
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45 private ArrayList list = null;
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46
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47 /** aspect ratio (width/height) */
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48 private float aspect = 0;
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49
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50 /** resolution of the biggest image (DPI) */
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51 private float resX = 0;
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52
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53 /** resolution of the biggest image (DPI) */
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54 private float resY = 0;
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55
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56 /**
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57 * Creator for empty fileset.
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58 *
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59 *
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60 * @param initialCapacity
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61 */
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62 public ImageFileset() {
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63 list = new ArrayList();
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64 }
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65
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66 /**
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67 * Constructor with a file and hints.
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68 *
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69 * The hints are expected to contain 'basedirs' and 'scaledfilext' keys.
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70 *
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71 * @param file
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72 * @param hints
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73 */
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74 public ImageFileset(File file, Map hints) {
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75 Directory[] dirs = (Directory[]) hints.get(FileOps.HINT_BASEDIRS);
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76 int nb = dirs.length;
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77 list = new ArrayList(nb);
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78 parent = dirs[0];
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79 fill(dirs, file, hints);
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80 }
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81
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82 /**
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83 * Adds an ImageFile to this Fileset.
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84 *
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85 * The files should be added in the order of higher to lower resolutions.
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86 * The first file is considered the hires "original".
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87 *
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88 *
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89 * @param f
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90 * file to add
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91 * @return true (always)
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92 */
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93 public boolean add(ImageFile f) {
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94 f.setParent(this);
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95 return list.add(f);
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96 }
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97
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98 /**
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99 * The number of image files in this Fileset.
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100 *
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101 *
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102 * @return number of image files
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103 */
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104 public int size() {
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105 return (list != null) ? list.size() : 0;
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106 }
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107
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108 /**
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109 * Gets the default File.
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110 *
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111 */
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112 public File getFile() {
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113 return (list != null) ? ((ImageFile) list.get(0)).getFile() : null;
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114 }
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115
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116 /**
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117 * Get the ImageFile at the index.
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118 *
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119 *
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120 * @param index
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121 * @return
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122 */
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123 public ImageFile get(int index) {
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124 return (ImageFile) list.get(index);
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125 }
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126
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127 /**
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128 * Get the next smaller ImageFile than the given size.
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129 *
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130 * Returns the ImageFile from the set that has a width and height smaller or
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131 * equal the given size. Returns null if there isn't any smaller image.
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132 * Needs DocuInfo instance to checkFile().
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133 *
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134 *
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135 * @param size
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136 * @param info
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137 * @return
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138 */
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139 public ImageFile getNextSmaller(ImageSize size) {
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140 for (Iterator i = getHiresIterator(); i.hasNext();) {
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141 ImageFile f = (ImageFile) i.next();
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142 try {
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143 if (!f.isChecked()) {
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144 ImageOps.checkFile(f);
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145 }
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146 if (f.getSize().isTotallySmallerThan(size)) {
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147 return f;
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148 }
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149 } catch (IOException e) {
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150 }
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151 }
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152 return null;
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153 }
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154
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155 /**
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156 * Get the next bigger ImageFile than the given size.
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157 *
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158 * Returns the ImageFile from the set that has a width or height bigger or
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159 * equal the given size. Returns null if there isn't any bigger image. Needs
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160 * DocuInfo instance to checkFile().
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161 *
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162 *
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163 * @param size
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164 * @param info
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165 * @return
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166 */
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167 public ImageFile getNextBigger(ImageSize size) {
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168 for (ListIterator i = getLoresIterator(); i.hasPrevious();) {
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169 ImageFile f = (ImageFile) i.previous();
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170 try {
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171 if (!f.isChecked()) {
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172 ImageOps.checkFile(f);
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173 }
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174 if (f.getSize().isBiggerThan(size)) {
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175 return f;
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176 }
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177 } catch (IOException e) {
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178 }
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179 }
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180 return null;
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181 }
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182
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183 /**
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184 * Returns the biggest ImageFile in the set.
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185 *
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186 *
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187 * @return
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188 */
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189 public ImageFile getBiggest() {
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190 return this.get(0);
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191 }
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192
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193 /**
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194 * Returns the biggest ImageFile in the set.
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195 *
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196 *
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197 * @return
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198 */
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199 public ImageFile getSmallest() {
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200 return this.get(this.size() - 1);
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201 }
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202
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203 /**
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204 * Get an Iterator for this Fileset starting at the highest resolution
159
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205 * images.
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206 *
170
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207 *
159
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208 * @return
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209 */
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210 public ListIterator getHiresIterator() {
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211 return list.listIterator();
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212 }
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213
170
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214 /**
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215 * Get an Iterator for this Fileset starting at the lowest resolution
159
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216 * images.
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217 *
170
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218 * The Iterator starts at the last element, so you have to use it backwards
159
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219 * with hasPrevious() and previous().
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220 *
170
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221 *
159
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222 * @return
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223 */
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224 public ListIterator getLoresIterator() {
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225 return list.listIterator(list.size());
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226 }
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227
170
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228 /**
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229 * Fill the ImageFileset with files from different base directories.
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230 *
159
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231 *
170
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232 * @param dirs
233
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233 * list of base directories
170
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234 * @param fl
233
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235 * file (from first base dir)
259
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236 * @param hints
284
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237 *
159
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238 */
259
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239 void fill(Directory[] dirs, File fl, Map hints) {
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240 String scalext = (String) hints.get(FileOps.HINT_FILEEXT);
159
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241 int nb = dirs.length;
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242 String fn = fl.getName();
259
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243 String baseFn = FileOps.basename(fn);
170
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244 // add the first ImageFile to the ImageFileset
159
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245 add(new ImageFile(fn, this, parent));
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246 // iterate the remaining base directories
284
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247 for (int dirIdx = 1; dirIdx < nb; dirIdx++) {
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248 if (dirs[dirIdx] == null) {
159
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249 continue;
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250 }
284
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251 // read the directory
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252 if (dirs[dirIdx].getFilenames() == null) {
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253 dirs[dirIdx].readDir();
259
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254 }
284
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255 String[] dirFiles = dirs[dirIdx].getFilenames();
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256 // try the same filename as the original
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257 int fileIdx = Arrays.binarySearch(dirFiles, fn);
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258 if (fileIdx < 0) {
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259 // try closest matches without extension
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260 fileIdx = -fileIdx - 1;
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261 // try idx
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262 if ((fileIdx < dirFiles.length)
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263 && (FileOps.basename(dirFiles[fileIdx]).equals(baseFn))) {
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264 // idx ok
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265 } else if ((fileIdx > 0)
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266 && (FileOps.basename(dirFiles[fileIdx - 1])
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267 .equals(baseFn))) {
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268 // idx-1 ok
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269 fileIdx = fileIdx - 1;
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270 } else if ((fileIdx+1 < dirFiles.length)
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271 && (FileOps.basename(dirFiles[fileIdx + 1])
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272 .equals(baseFn))) {
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273 // idx+1 ok
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274 fileIdx = fileIdx + 1;
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275 } else {
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276 // basename doesn't match
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277 continue;
259
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278 }
159
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279 }
284
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280 if (FileOps.classForFilename(dirFiles[fileIdx]) == FileOps.CLASS_IMAGE) {
295
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281 /* logger.debug("adding file " + dirFiles[fileIdx]
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282 + " to Fileset " + this.getName()); */
284
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283 add(new ImageFile(dirFiles[fileIdx], this, dirs[dirIdx]));
259
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284 }
159
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285 }
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286 }
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287
170
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288 /**
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289 * Checks metadata and sets resolution in resX and resY.
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290 *
159
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291 */
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292 public void checkMeta() {
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293 if (metaChecked) {
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294 return;
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295 }
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296 if (fileMeta == null) {
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297 // try to read metadata file
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298 readMeta();
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299 if (fileMeta == null) {
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300 // try directory metadata
233
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301 ((DocuDirectory) parent).checkMeta();
159
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302 if (((DocuDirectory) parent).getDirMeta() != null) {
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303 fileMeta = ((DocuDirectory) parent).getDirMeta();
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304 } else {
233
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305 // try parent directory metadata
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306 DocuDirectory gp = (DocuDirectory) parent.getParent();
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307 if (gp != null) {
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diff changeset
308 gp.checkMeta();
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diff changeset
309 if (gp.getDirMeta() != null) {
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diff changeset
310 fileMeta = gp.getDirMeta();
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diff changeset
311 }
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diff changeset
312 }
159
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313 }
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314 }
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315 }
354
7958035abec1 Servlet version 1.5.9d
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diff changeset
316 if (fileMeta == null) {
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diff changeset
317 // no metadata available
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diff changeset
318 metaChecked = true;
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diff changeset
319 return;
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diff changeset
320 }
159
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321 metaChecked = true;
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diff changeset
322 String s;
295
90bab835fc25 Servlet version 1.5.0b -- the beginning of the next generation :-)
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diff changeset
323 float dpi = 0;
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diff changeset
324 float dpix = 0;
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diff changeset
325 float dpiy = 0;
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diff changeset
326 float sizex = 0;
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diff changeset
327 float sizey = 0;
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diff changeset
328 float pixx = 0;
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329 float pixy = 0;
159
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330 // DPI is valid for X and Y
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diff changeset
331 if (fileMeta.containsKey("original-dpi")) {
e743b853efca servlet version 1.16a4
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diff changeset
332 try {
295
90bab835fc25 Servlet version 1.5.0b -- the beginning of the next generation :-)
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diff changeset
333 dpi = Float.parseFloat((String) fileMeta.get("original-dpi"));
159
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334 } catch (NumberFormatException e) {
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diff changeset
335 }
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diff changeset
336 if (dpi != 0) {
e743b853efca servlet version 1.16a4
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diff changeset
337 resX = dpi;
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diff changeset
338 resY = dpi;
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339 return;
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diff changeset
340 }
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diff changeset
341 }
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342 // DPI-X and DPI-Y
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diff changeset
343 if (fileMeta.containsKey("original-dpi-x")
233
e40d8b2e3978 Servlet version 1.19b1 -- with context metadata
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diff changeset
344 && fileMeta.containsKey("original-dpi-y")) {
159
e743b853efca servlet version 1.16a4
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345 try {
295
90bab835fc25 Servlet version 1.5.0b -- the beginning of the next generation :-)
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diff changeset
346 dpix = Float.parseFloat((String) fileMeta
233
e40d8b2e3978 Servlet version 1.19b1 -- with context metadata
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diff changeset
347 .get("original-dpi-x"));
295
90bab835fc25 Servlet version 1.5.0b -- the beginning of the next generation :-)
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348 dpiy = Float.parseFloat((String) fileMeta
233
e40d8b2e3978 Servlet version 1.19b1 -- with context metadata
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diff changeset
349 .get("original-dpi-y"));
159
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350 } catch (NumberFormatException e) {
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diff changeset
351 }
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352 if ((dpix != 0) && (dpiy != 0)) {
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353 resX = dpix;
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354 resY = dpiy;
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355 return;
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diff changeset
356 }
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diff changeset
357 }
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358 // SIZE-X and SIZE-Y and PIXEL-X and PIXEL-Y
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359 if (fileMeta.containsKey("original-size-x")
233
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diff changeset
360 && fileMeta.containsKey("original-size-y")
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diff changeset
361 && fileMeta.containsKey("original-pixel-x")
e40d8b2e3978 Servlet version 1.19b1 -- with context metadata
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parents: 181
diff changeset
362 && fileMeta.containsKey("original-pixel-y")) {
159
e743b853efca servlet version 1.16a4
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363 try {
295
90bab835fc25 Servlet version 1.5.0b -- the beginning of the next generation :-)
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diff changeset
364 sizex = Float.parseFloat((String) fileMeta
233
e40d8b2e3978 Servlet version 1.19b1 -- with context metadata
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diff changeset
365 .get("original-size-x"));
295
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diff changeset
366 sizey = Float.parseFloat((String) fileMeta
233
e40d8b2e3978 Servlet version 1.19b1 -- with context metadata
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parents: 181
diff changeset
367 .get("original-size-y"));
295
90bab835fc25 Servlet version 1.5.0b -- the beginning of the next generation :-)
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diff changeset
368 pixx = Float.parseFloat((String) fileMeta
233
e40d8b2e3978 Servlet version 1.19b1 -- with context metadata
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diff changeset
369 .get("original-pixel-x"));
295
90bab835fc25 Servlet version 1.5.0b -- the beginning of the next generation :-)
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diff changeset
370 pixy = Float.parseFloat((String) fileMeta
233
e40d8b2e3978 Servlet version 1.19b1 -- with context metadata
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diff changeset
371 .get("original-pixel-y"));
159
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diff changeset
372 } catch (NumberFormatException e) {
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diff changeset
373 }
e743b853efca servlet version 1.16a4
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374 if ((sizex != 0) && (sizey != 0) && (pixx != 0) && (pixy != 0)) {
295
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375 resX = pixx / (sizex * 100 / 2.54f);
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376 resY = pixy / (sizey * 100 / 2.54f);
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377 return;
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378 }
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379 }
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380 }
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381
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382 /**
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383 * @return
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384 */
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385 public float getResX() {
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386 return resX;
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387 }
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388
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389 /**
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390 * @return
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391 */
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392 public float getResY() {
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393 return resY;
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394 }
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395
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396 /**
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397 * Sets the aspect ratio from an ImageSize.
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398 *
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399 *
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400 * @param f
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401 */
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402 public void setAspect(ImageSize s) {
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403 aspect = s.getAspect();
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404 }
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405
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406 /**
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407 * Returns the aspect ratio.
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408 *
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409 * Aspect ratio is (width/height). So it's <1 for portrait and >1 for
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410 * landscape.
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411 *
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412 *
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413 * @return
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414 */
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415 public float getAspect() {
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416 return aspect;
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417 }
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418
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419 }