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annotate dwtx/jface/resource/FileImageDescriptor.d @ 73:6787ae179808

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Fix FileImageDescriptor to work with compiletime data
author Frank Benoit <benoit@tionex.de>
date Thu, 22 May 2008 19:09:48 +0200
parents 5df4896124c7
children 7ffeace6c47f
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1 /*******************************************************************************
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2 * Copyright (c) 2000, 2008 IBM Corporation and others.
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3 * All rights reserved. This program and the accompanying materials
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4 * are made available under the terms of the Eclipse Public License v1.0
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5 * which accompanies this distribution, and is available at
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6 * http://www.eclipse.org/legal/epl-v10.html
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7 *
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8 * Contributors:
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9 * IBM Corporation - initial API and implementation
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10 * Port to the D programming language:
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11 * Frank Benoit <benoit@tionex.de>
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12 *******************************************************************************/
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13 module dwtx.jface.resource.FileImageDescriptor;
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14
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15 import dwtx.jface.resource.ImageDescriptor;
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16
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17 // import java.io.BufferedInputStream;
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18 // import java.io.FileInputStream;
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19 // import java.io.FileNotFoundException;
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20 // import java.io.IOException;
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21 // import java.io.InputStream;
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22
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23 import dwt.DWT;
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24 import dwt.DWTException;
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25 import dwt.graphics.Device;
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26 import dwt.graphics.Image;
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27 import dwt.graphics.ImageData;
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28 import dwtx.core.runtime.Path;
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29
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30 import dwt.dwthelper.utils;
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31 import dwt.dwthelper.InputStream;
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32 import dwt.dwthelper.FileInputStream;
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33 import dwt.dwthelper.BufferedInputStream;
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34 import dwt.dwthelper.ByteArrayInputStream;
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35
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36 import tango.util.log.Trace;
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37 import tango.text.convert.Format;
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38
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39 /**
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40 * An image descriptor that loads its image information from a file.
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41 */
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42 class FileImageDescriptor : ImageDescriptor {
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43
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44 /**
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45 * The class whose resource directory contain the file, or <code>null</code>
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46 * if none.
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47 */
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48 // private ClassInfo location;
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49
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50 /**
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51 * The name of the file.
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52 */
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53 private String name;
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54 private void[] importdata;
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55
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56 /**
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57 * Creates a new file image descriptor. The file has the given file name and
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58 * is located in the given class's resource directory. If the given class is
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59 * <code>null</code>, the file name must be absolute.
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60 * <p>
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61 * Note that the file is not accessed until its <code>getImageDate</code>
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62 * method is called.
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63 * </p>
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64 *
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65 * @param clazz
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66 * class for resource directory, or <code>null</code>
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67 * @param filename
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68 * the name of the file
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69 */
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70 this(ImportData importdata) {
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71 // this.location = clazz;
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72 this.name = importdata.name;
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73 this.importdata = importdata.data;
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74 }
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75
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76 /*
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77 * (non-Javadoc) Method declared on Object.
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78 */
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79 public override int opEquals(Object o) {
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80 if (!( cast(FileImageDescriptor)o )) {
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81 return false;
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82 }
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83 FileImageDescriptor other = cast(FileImageDescriptor) o;
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84 // if (location !is null) {
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85 // if ( location.name != other.location.name ) {
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86 // return false;
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87 // }
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88 // } else {
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89 // if (other.location !is null) {
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90 // return false;
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91 // }
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92 // }
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93 return importdata == other.importdata;
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94 }
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95
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96 /**
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97 * @see dwtx.jface.resource.ImageDescriptor#getImageData() The
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98 * FileImageDescriptor implementation of this method is not used by
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99 * {@link ImageDescriptor#createImage(bool, Device)} as of version
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100 * 3.4 so that the DWT OS optimised loading can be used.
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101 */
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102 public override ImageData getImageData() {
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103 InputStream in_ = getStream();
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104 ImageData result = null;
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105 if (in_ !is null) {
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106 try {
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107 result = new ImageData(in_);
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108 } catch (DWTException e) {
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109 if (e.code !is DWT.ERROR_INVALID_IMAGE /+&& e.code !is DWT.ERROR_UNSUPPORTED_FORMAT+/) {
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110 Trace.formatln( "FileImageDescriptor getImageData DWTException for name={}", name );
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111 throw e;
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112 // fall through otherwise
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113 }
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114 } finally {
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115 in_.close();
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116 }
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117 }
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118 return result;
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119 }
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120
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121 /**
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122 * Returns a stream on the image contents. Returns null if a stream could
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123 * not be opened.
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124 *
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125 * @return the buffered stream on the file or <code>null</code> if the
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126 * file cannot be found
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127 */
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128 private InputStream getStream() {
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129 InputStream is_ = null;
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130
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131 // if (location !is null) {
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132 // Trace.formatln( "FileImageDescriptor getStream importdata.length={} name={}",importdata.length, name );
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133 is_ = new ByteArrayInputStream(cast(byte[]) importdata);
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134 // is_ = ClassInfoGetResourceAsStream( location, name);
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135
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136 // } else {
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137 // try {
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138 // is_ = new FileInputStream(name);
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139 // } catch (/+FileNotFoundException+/ IOException e) {
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140 // return null;
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141 // }
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142 // }
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143 if (is_ is null) {
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144 return null;
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145 }
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146 return new BufferedInputStream(is_);
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147
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148 }
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149
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150 /*
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151 * (non-Javadoc) Method declared on Object.
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152 */
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153 public override hash_t toHash() {
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154 int code = dwt.dwthelper.utils.toHash(cast(char[])importdata/+name+/);
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155 // if (location !is null) {
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156 // code += location.toHash();
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157 // }
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158 return code;
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159 }
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160
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161 /*
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162 * (non-Javadoc) Method declared on Object.
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163 */
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164 /**
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165 * The <code>FileImageDescriptor</code> implementation of this
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166 * <code>Object</code> method returns a string representation of this
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167 * object which is suitable only for debugging.
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168 */
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169 public override String toString() {
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170 return Format("FileImageDescriptor(name={})", name );//$NON-NLS-3$//$NON-NLS-2$//$NON-NLS-1$
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171 }
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172
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173 /*
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174 * (non-Javadoc)
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175 *
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176 * @see dwtx.jface.resource.ImageDescriptor#createImage(bool,
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177 * dwt.graphics.Device)
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178 */
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179 public override Image createImage(bool returnMissingImageOnError, Device device) {
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180 if( importdata.length is 0 ){
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181 String path = getFilePath();
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182 if (path is null )
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183 return createDefaultImage(returnMissingImageOnError, device);
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184 try {
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185 return new Image(device, path);
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186 } catch (DWTException exception) {
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187 //if we fail try the default way using a stream
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188 }
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189 }
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190 return super.createImage(returnMissingImageOnError, device);
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191 }
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192
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193 /**
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194 * Return default image if returnMissingImageOnError is true.
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195 *
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196 * @param device
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197 * @return Image or <code>null</code>
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198 */
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199 private Image createDefaultImage(bool returnMissingImageOnError,
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200 Device device) {
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201 try {
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202 if (returnMissingImageOnError)
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203 return new Image(device, DEFAULT_IMAGE_DATA);
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204 } catch (DWTException nextException) {
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205 return null;
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206 }
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207 return null;
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208 }
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209
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210 /**
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211 * Returns the filename for the ImageData.
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212 *
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213 * @return {@link String} or <code>null</code> if the file cannot be found
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214 */
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215 private String getFilePath() {
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216
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217 // if (location is null)
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218 // return (new Path(name)).toOSString();
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219 //
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220 // URL resource = location.getResource(name);
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221 //
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222 // if (resource is null)
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223 // return null;
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224 // try {
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225 // if (JFaceActivator.getBundleContext() is null) {// Stand-alone case
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226 //
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227 // return new Path(resource.getFile()).toOSString();
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228 // }
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229 // return new Path(FileLocator.toFileURL(resource).getPath()).toOSString();
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230 return null;
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231 // } catch (IOException e) {
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232 // Policy.logException(e);
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233 // return null;
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234 // }
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235 }
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236 }