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annotate dwt/internal/Compatibility.d @ 131:03fac5984741

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author Jacob Carlborg <doob@me.com>
date Mon, 16 Mar 2009 22:38:50 +0100
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1 /*******************************************************************************
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2 * Copyright (c) 2000, 2007 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 dwt.internal.Compatibility;
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15 import dwt.dwthelper.utils;
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16 /+
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17 import java.io.File;
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18 import java.text.MessageFormat;
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19 import java.util.MissingResourceException;
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20 import java.util.ResourceBundle;
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21 import java.util.zip.DeflaterOutputStream;
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22 import java.util.zip.InflaterInputStream;
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23 +/
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24
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25 import dwt.DWT;
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26 public import dwt.dwthelper.FileInputStream;
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27 public import dwt.dwthelper.FileOutputStream;
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28 public import dwt.dwthelper.InflaterInputStream;
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29 import dwt.dwthelper.BufferedInputStream;
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30 import dwt.dwthelper.ResourceBundle;
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31
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32 import Math = tango.math.Math;
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33 import Unicode = tango.text.Unicode;
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34 import tango.sys.Process;
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35 import tango.text.convert.Format;
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36
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37 /**
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38 * This class is a placeholder for utility methods commonly
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39 * used on J2SE platforms but not supported on some J2ME
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40 * profiles.
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41 * <p>
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42 * It is part of our effort to provide support for both J2SE
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43 * and J2ME platforms.
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44 * </p>
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45 * <p>
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46 * IMPORTANT: some of the methods have been modified from their
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47 * J2SE parents. Refer to the description of each method for
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48 * specific changes.
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49 * </p>
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50 * <ul>
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51 * <li>Exceptions thrown may differ since J2ME's set of
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52 * exceptions is a subset of J2SE's one.
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53 * </li>
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54 * <li>The range of the mathematic functions is subject to
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55 * change.
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56 * </li>
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57 * </ul>
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58 */
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59 public final class Compatibility {
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60
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61 /**
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62 * Returns the PI constant as a double.
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63 */
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64 public static const real PI = Math.PI;
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65
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66 static const real toRadians = PI / 180;
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67
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68 /**
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69 * Answers the length of the side adjacent to the given angle
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70 * of a right triangle. In other words, it returns the integer
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71 * conversion of length * cos (angle).
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72 * <p>
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73 * IMPORTANT: the j2me version has an additional restriction on
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74 * the argument. length must be between -32767 and 32767 (inclusive).
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75 * </p>
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76 *
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77 * @param angle the angle in degrees
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78 * @param length the length of the triangle's hypotenuse
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79 * @return the integer conversion of length * cos (angle)
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80 */
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81 public static int cos(int angle, int length) {
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82 return cast(int)(Math.cos(angle * toRadians) * length);
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83 }
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84
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85 /**
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86 * Answers the length of the side opposite to the given angle
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87 * of a right triangle. In other words, it returns the integer
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88 * conversion of length * sin (angle).
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89 * <p>
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90 * IMPORTANT: the j2me version has an additional restriction on
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91 * the argument. length must be between -32767 and 32767 (inclusive).
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92 * </p>
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93 *
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94 * @param angle the angle in degrees
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95 * @param length the length of the triangle's hypotenuse
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96 * @return the integer conversion of length * sin (angle)
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97 */
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98 public static int sin(int angle, int length) {
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99 return cast(int)(Math.sin(angle * toRadians) * length);
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100 }
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101
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102 /**
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103 * Answers the most negative (i.e. closest to negative infinity)
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104 * integer value which is greater than the number obtained by dividing
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105 * the first argument p by the second argument q.
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106 *
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107 * @param p numerator
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108 * @param q denominator (must be different from zero)
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109 * @return the ceiling of the rational number p / q.
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110 */
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111 public static int ceil(int p, int q) {
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112 return cast(int)Math.ceil(cast(float)p / q);
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113 }
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114
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115 /**
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116 * Answers whether the indicated file exists or not.
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117 *
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118 * @param parent the file's parent directory
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119 * @param child the file's name
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120 * @return true if the file exists
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121 */
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122 public static bool fileExists(String parent, String child) {
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123 return (new File (parent, child)).exists();
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124 }
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125
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126 /**
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127 * Answers the most positive (i.e. closest to positive infinity)
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128 * integer value which is less than the number obtained by dividing
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129 * the first argument p by the second argument q.
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130 *
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131 * @param p numerator
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132 * @param q denominator (must be different from zero)
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133 * @return the floor of the rational number p / q.
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134 */
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135 public static int floor(int p, int q) {
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136 return cast(int)Math.floor(cast(double)p / q);
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137 }
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138
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139 /**
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140 * Answers the result of rounding to the closest integer the number obtained
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141 * by dividing the first argument p by the second argument q.
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142 * <p>
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143 * IMPORTANT: the j2me version has an additional restriction on
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144 * the arguments. p must be within the range 0 - 32767 (inclusive).
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145 * q must be within the range 1 - 32767 (inclusive).
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146 * </p>
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147 *
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148 * @param p numerator
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149 * @param q denominator (must be different from zero)
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150 * @return the closest integer to the rational number p / q
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151 */
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152 public static int round(int p, int q) {
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153 return cast(int)Math.round(cast(float)p / q);
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154 }
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155
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156 /**
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157 * Returns 2 raised to the power of the argument.
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158 *
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159 * @param n an int value between 0 and 30 (inclusive)
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160 * @return 2 raised to the power of the argument
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161 *
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162 * @exception IllegalArgumentException <ul>
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163 * <li>ERROR_INVALID_RANGE - if the argument is not between 0 and 30 (inclusive)</li>
0
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164 * </ul>
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165 */
12
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166 public static int pow2(int n) {
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167 if (n >= 1 && n <= 30)
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168 return 2 << (n - 1);
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169 else if (n != 0) {
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170 DWT.error(DWT.ERROR_INVALID_RANGE);
0
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171 }
12
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172 return 1;
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173 }
0
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174
12
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175 /**
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176 * Create an DeflaterOutputStream if such things are supported.
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177 *
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178 * @param stream the output stream
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179 * @return a deflater stream or <code>null</code>
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180 * @exception IOException
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181 *
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182 * @since 3.4
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183 */
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184 public static OutputStream newDeflaterOutputStream(OutputStream stream) {
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185 implMissing(__FILE__,__LINE__);
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186 return null;
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187 //DWT_TODO return new DeflaterOutputStream(stream);
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188 }
0
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189
12
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190 /**
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191 * Open a file if such things are supported.
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192 *
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193 * @param filename the name of the file to open
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194 * @return a stream on the file if it could be opened.
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195 * @exception IOException
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196 */
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197 public static InputStream newFileInputStream(String filename) {
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198 return new FileInputStream(filename);
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199 }
0
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200
12
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201 /**
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202 * Open a file if such things are supported.
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203 *
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204 * @param filename the name of the file to open
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205 * @return a stream on the file if it could be opened.
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206 * @exception IOException
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207 */
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208 public static OutputStream newFileOutputStream(String filename) {
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209 return new FileOutputStream(filename);
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210 }
0
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211
12
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diff changeset
212 /**
34bfdb096054 Ported dwt.internal.Compatibility
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213 * Create an InflaterInputStream if such things are supported.
34bfdb096054 Ported dwt.internal.Compatibility
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diff changeset
214 *
34bfdb096054 Ported dwt.internal.Compatibility
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215 * @param stream the input stream
34bfdb096054 Ported dwt.internal.Compatibility
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diff changeset
216 * @return a inflater stream or <code>null</code>
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diff changeset
217 * @exception IOException
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diff changeset
218 *
34bfdb096054 Ported dwt.internal.Compatibility
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diff changeset
219 * @since 3.3
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220 */
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diff changeset
221 public static InflaterInputStream newInflaterInputStream(InputStream stream) {
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222 return new InflaterInputStream(stream);
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223 }
0
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224
12
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diff changeset
225 /**
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diff changeset
226 * Answers whether the character is a letter.
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diff changeset
227 *
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228 * @param c the character
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diff changeset
229 * @return true when the character is a letter
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diff changeset
230 */
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diff changeset
231 public static bool isLetter(dchar c) {
126
38807a925e24 Fixed compile errors, support for SWT language files
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diff changeset
232 return Unicode.isLetter(c);
12
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233 }
0
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234
12
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parents: 0
diff changeset
235 /**
34bfdb096054 Ported dwt.internal.Compatibility
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diff changeset
236 * Answers whether the character is a letter or a digit.
34bfdb096054 Ported dwt.internal.Compatibility
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diff changeset
237 *
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diff changeset
238 * @param c the character
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diff changeset
239 * @return true when the character is a letter or a digit
34bfdb096054 Ported dwt.internal.Compatibility
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240 */
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Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents: 0
diff changeset
241 public static bool isLetterOrDigit(dchar c) {
126
38807a925e24 Fixed compile errors, support for SWT language files
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diff changeset
242 return Unicode.isLetterOrDigit(c);
12
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diff changeset
243 }
0
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244
12
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diff changeset
245 /**
34bfdb096054 Ported dwt.internal.Compatibility
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents: 0
diff changeset
246 * Answers whether the character is a Unicode space character.
34bfdb096054 Ported dwt.internal.Compatibility
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents: 0
diff changeset
247 *
34bfdb096054 Ported dwt.internal.Compatibility
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diff changeset
248 * @param c the character
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diff changeset
249 * @return true when the character is a Unicode space character
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diff changeset
250 */
34bfdb096054 Ported dwt.internal.Compatibility
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents: 0
diff changeset
251 public static bool isSpaceChar(dchar c) {
126
38807a925e24 Fixed compile errors, support for SWT language files
Jacob Carlborg <doob@me.com>
parents: 45
diff changeset
252 return Unicode.isSpace(c);
12
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diff changeset
253 }
0
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254
12
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parents: 0
diff changeset
255 /**
34bfdb096054 Ported dwt.internal.Compatibility
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents: 0
diff changeset
256 * Answers whether the character is a whitespace character.
34bfdb096054 Ported dwt.internal.Compatibility
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents: 0
diff changeset
257 *
34bfdb096054 Ported dwt.internal.Compatibility
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diff changeset
258 * @param c the character to test
34bfdb096054 Ported dwt.internal.Compatibility
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diff changeset
259 * @return true if the character is whitespace
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260 */
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261 public static bool isWhitespace(dchar c) {
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262 return Unicode.isWhitespace(c);
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263 }
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264
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265 /**
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266 * Execute a program in a separate platform process if the
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267 * underlying platform support this.
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268 * <p>
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269 * The new process inherits the environment of the caller.
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270 * </p>
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271 *
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272 * @param prog the name of the program to execute
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273 *
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274 * @exception ProcessException
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275 * if the program cannot be executed
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276 */
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277 public static void exec(String prog) {
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278 auto proc = new Process( prog );
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279 proc.execute;
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280 }
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281
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282 /**
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283 * Execute progArray[0] in a separate platform process if the
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284 * underlying platform support this.
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285 * <p>
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286 * The new process inherits the environment of the caller.
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287 * <p>
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288 *
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289 * @param progArray array containing the program to execute and its arguments
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290 *
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291 * @exception ProcessException
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292 * if the program cannot be executed
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293 */
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294 public static void exec(String[] progArray) {
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295 auto proc = new Process( progArray );
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296 proc.execute;
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297 }
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298
131
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299 const ImportData[] SWTMessagesBundleData = [
126
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300 getImportData!( "swt.internal.SWTMessages.properties" ),
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301 getImportData!( "swt.internal.SWTMessages_ar.properties" ),
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302 getImportData!( "swt.internal.SWTMessages_cs.properties" ),
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303 getImportData!( "swt.internal.SWTMessages_da.properties" ),
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304 getImportData!( "swt.internal.SWTMessages_de.properties" ),
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305 getImportData!( "swt.internal.SWTMessages_el.properties" ),
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306 getImportData!( "swt.internal.SWTMessages_es.properties" ),
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307 getImportData!( "swt.internal.SWTMessages_fi.properties" ),
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308 getImportData!( "swt.internal.SWTMessages_fr.properties" ),
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309 getImportData!( "swt.internal.SWTMessages_hu.properties" ),
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310 getImportData!( "swt.internal.SWTMessages_it.properties" ),
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311 getImportData!( "swt.internal.SWTMessages_iw.properties" ),
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312 getImportData!( "swt.internal.SWTMessages_ja.properties" ),
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313 getImportData!( "swt.internal.SWTMessages_ko.properties" ),
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314 getImportData!( "swt.internal.SWTMessages_nl.properties" ),
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315 getImportData!( "swt.internal.SWTMessages_no.properties" ),
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316 getImportData!( "swt.internal.SWTMessages_pl.properties" ),
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317 getImportData!( "swt.internal.SWTMessages_pt_BR.properties" ),
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318 getImportData!( "swt.internal.SWTMessages_pt.properties" ),
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319 getImportData!( "swt.internal.SWTMessages_ru.properties" ),
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320 getImportData!( "swt.internal.SWTMessages_sv.properties" ),
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321 getImportData!( "swt.internal.SWTMessages_tr.properties" ),
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322 getImportData!( "swt.internal.SWTMessages_zh_HK.properties" ),
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323 getImportData!( "swt.internal.SWTMessages_zh.properties" ),
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324 getImportData!( "swt.internal.SWTMessages_zh_TW.properties" )
131
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325 ];
126
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326
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327 private static ResourceBundle msgs = null;
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328
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329 /**
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330 * Returns the NLS'ed message for the given argument. This is only being
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331 * called from DWT.
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332 *
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333 * @param key the key to look up
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334 * @return the message for the given key
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335 *
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336 * @see DWT#getMessage(String)
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337 */
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338 public static String getMessage(String key) {
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339 String answer = key;
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340
126
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341 if (key is null) {
12
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342 DWT.error (DWT.ERROR_NULL_ARGUMENT);
126
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343 }
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344 if (msgs is null) {
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345 try {
126
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346 msgs = ResourceBundle.getBundle(SWTMessagesBundleData); //$NON-NLS-1$
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347 } catch (MissingResourceException ex) {
12
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348 answer = key ~ " (no resource bundle)"; //$NON-NLS-1$
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349 }
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350 }
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351 if (msgs !is null) {
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352 try {
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353 answer = msgs.getString(key);
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354 } catch (MissingResourceException ex2) {}
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355 }
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356 return answer;
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357 }
126
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358
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359 public static String getMessage(String key, Object[] args) {
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360 String answer = key;
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361
126
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362 if (key is null || args is null) {
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363 DWT.error (DWT.ERROR_NULL_ARGUMENT);
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364 }
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365 if (msgs is null) {
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366 try {
126
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367 msgs = ResourceBundle.getBundle(SWTMessagesBundleData); //$NON-NLS-1$
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368 } catch (MissingResourceException ex) {
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369 answer = key ~ " (no resource bundle)"; //$NON-NLS-1$
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370 }
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371 }
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372 if (msgs !is null) {
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373 try {
126
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374 char[] frmt = msgs.getString(key);
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375 switch( args.length ){
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376 case 0: answer = Format(frmt); break;
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377 case 1: answer = Format(frmt, args[0]); break;
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378 case 2: answer = Format(frmt, args[0], args[1]); break;
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379 case 3: answer = Format(frmt, args[0], args[1], args[2]); break;
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380 case 4: answer = Format(frmt, args[0], args[1], args[2], args[3]); break;
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381 case 5: answer = Format(frmt, args[0], args[1], args[2], args[3], args[4]); break;
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diff changeset
382 default:
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383 implMissing(__FILE__, __LINE__ );
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384 }
12
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385 } catch (MissingResourceException ex2) {}
0
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386 }
12
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387 return answer;
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388 }
126
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diff changeset
389
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diff changeset
390
12
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diff changeset
391 /**
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392 * Interrupt the current thread.
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393 * <p>
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394 * Note that this is not available on CLDC.
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395 * </p>
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396 */
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397 public static void interrupt() {
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398 //PORTING_FIXME: how to implement??
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399 //Thread.currentThread().interrupt();
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400 }
0
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401
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402 /**
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403 * Compares two instances of class String ignoring the case of the
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404 * characters and answers if they are equal.
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405 *
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406 * @param s1 string
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407 * @param s2 string
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408 * @return true if the two instances of class String are equal
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409 */
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410 public static bool equalsIgnoreCase(String s1, String s2) {
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411 String s1b = new char[ s1.length ];
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412 String s2b = new char[ s1.length ];
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413 scope(exit){
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414 delete s1b;
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415 delete s2b;
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416 }
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417 String s1c = Unicode.toFold( s1, s1b );
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418 String s2c = Unicode.toFold( s2, s2b );
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419 return s1c == s2c;
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420 }
0
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421
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422 }