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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 org.eclipse.swt.internal.Compatibility;
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14
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15 import java.lang.all;
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16 import java.io.BufferedInputStream;
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17 import java.io.File;
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18 import java.io.InputStream;
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19 import java.io.FileInputStream;
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20 import java.io.FileOutputStream;
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21 import java.text.MessageFormat;
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22 import java.util.MissingResourceException;
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23 import java.util.ResourceBundle;
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24 import java.util.zip.InflaterInputStream;
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25 //import java.util.zip.DeflaterOutputStream;
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26
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27 import org.eclipse.swt.SWT;
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28
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26
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29 version(Tango){
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25
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30 import Unicode = tango.text.Unicode;
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31 import tango.sys.Process;
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26
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32 } else { // Phobos
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33 }
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25
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34
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35 /**
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36 * This class is a placeholder for utility methods commonly
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37 * used on J2SE platforms but not supported on some J2ME
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38 * profiles.
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39 * <p>
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40 * It is part of our effort to provide support for both J2SE
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41 * and J2ME platforms.
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42 * </p>
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43 * <p>
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44 * IMPORTANT: some of the methods have been modified from their
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45 * J2SE parents. Refer to the description of each method for
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46 * specific changes.
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47 * </p>
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48 * <ul>
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49 * <li>Exceptions thrown may differ since J2ME's set of
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50 * exceptions is a subset of J2SE's one.
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51 * </li>
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52 * <li>The range of the mathematic functions is subject to
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53 * change.
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54 * </li>
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55 * </ul>
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56 */
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57 public final class Compatibility {
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58
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59 /**
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60 * Returns the PI constant as a double.
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61 */
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62 public static const real PI = Math.PI;
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63
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64 static const real toRadians = PI / 180;
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65
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66 /**
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67 * Answers the length of the side adjacent to the given angle
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68 * of a right triangle. In other words, it returns the integer
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69 * conversion of length * cos (angle).
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70 * <p>
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71 * IMPORTANT: the j2me version has an additional restriction on
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72 * the argument. length must be between -32767 and 32767 (inclusive).
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73 * </p>
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74 *
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75 * @param angle the angle in degrees
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76 * @param length the length of the triangle's hypotenuse
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77 * @return the integer conversion of length * cos (angle)
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78 */
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79 public static int cos(int angle, int length) {
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80 return cast(int)(Math.cos(angle * toRadians) * length);
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81 }
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82
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83 /**
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84 * Answers the length of the side opposite to the given angle
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85 * of a right triangle. In other words, it returns the integer
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86 * conversion of length * sin (angle).
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87 * <p>
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88 * IMPORTANT: the j2me version has an additional restriction on
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89 * the argument. length must be between -32767 and 32767 (inclusive).
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90 * </p>
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91 *
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92 * @param angle the angle in degrees
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93 * @param length the length of the triangle's hypotenuse
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94 * @return the integer conversion of length * sin (angle)
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95 */
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96 public static int sin(int angle, int length) {
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97 return cast(int)(Math.sin(angle * toRadians) * length);
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98 }
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99
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100 /**
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101 * Answers the most negative (i.e. closest to negative infinity)
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102 * integer value which is greater than the number obtained by dividing
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103 * the first argument p by the second argument q.
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104 *
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105 * @param p numerator
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106 * @param q denominator (must be different from zero)
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107 * @return the ceiling of the rational number p / q.
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108 */
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109 public static int ceil(int p, int q) {
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110 return cast(int)Math.ceil(cast(float)p / q);
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111 }
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112
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113 /**
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114 * Answers whether the indicated file exists or not.
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115 *
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116 * @param parent the file's parent directory
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117 * @param child the file's name
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118 * @return true if the file exists
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119 */
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120 public static bool fileExists(CString parent, CString child) {
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25
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121 return (new File (parent, child)).exists();
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122 }
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123
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124 /**
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125 * Answers the most positive (i.e. closest to positive infinity)
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126 * integer value which is less than the number obtained by dividing
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127 * the first argument p by the second argument q.
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128 *
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129 * @param p numerator
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130 * @param q denominator (must be different from zero)
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131 * @return the floor of the rational number p / q.
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132 */
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133 public static int floor(int p, int q) {
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134 return cast(int)Math.floor(cast(double)p / q);
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135 }
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136
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137 /**
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138 * Answers the result of rounding to the closest integer the number obtained
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139 * by dividing the first argument p by the second argument q.
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140 * <p>
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141 * IMPORTANT: the j2me version has an additional restriction on
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142 * the arguments. p must be within the range 0 - 32767 (inclusive).
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143 * q must be within the range 1 - 32767 (inclusive).
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144 * </p>
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145 *
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146 * @param p numerator
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147 * @param q denominator (must be different from zero)
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148 * @return the closest integer to the rational number p / q
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149 */
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150 public static int round(int p, int q) {
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151 return cast(int)Math.round(cast(float)p / q);
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152 }
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153
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154 /**
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155 * Returns 2 raised to the power of the argument.
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156 *
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157 * @param n an int value between 0 and 30 (inclusive)
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158 * @return 2 raised to the power of the argument
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159 *
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160 * @exception IllegalArgumentException <ul>
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161 * <li>ERROR_INVALID_RANGE - if the argument is not between 0 and 30 (inclusive)</li>
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162 * </ul>
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163 */
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164 public static int pow2(int n) {
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165 if (n >= 1 && n <= 30)
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166 return 2 << (n - 1);
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167 else if (n != 0) {
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168 SWT.error(SWT.ERROR_INVALID_RANGE);
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169 }
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170 return 1;
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171 }
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172
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173 /**
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174 * Create an DeflaterOutputStream if such things are supported.
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175 *
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176 * @param stream the output stream
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177 * @return a deflater stream or <code>null</code>
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178 * @exception IOException
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179 *
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180 * @since 3.4
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181 */
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182 public static OutputStream newDeflaterOutputStream(OutputStream stream) {
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183 implMissing(__FILE__,__LINE__);
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184 return null;
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185 //DWT_TODO return new DeflaterOutputStream(stream);
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186 }
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187
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188 /**
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189 * Open a file if such things are supported.
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190 *
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191 * @param filename the name of the file to open
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192 * @return a stream on the file if it could be opened.
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193 * @exception IOException
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194 */
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195 public static InputStream newFileInputStream(CString filename) {
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196 return new FileInputStream(filename._idup());
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25
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197 }
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198
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199 /**
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200 * Open a file if such things are supported.
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201 *
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202 * @param filename the name of the file to open
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203 * @return a stream on the file if it could be opened.
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204 * @exception IOException
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205 */
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206 public static OutputStream newFileOutputStream(CString filename) {
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207 return new FileOutputStream(filename._idup());
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25
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208 }
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209
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210 /**
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211 * Create an InflaterInputStream if such things are supported.
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212 *
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213 * @param stream the input stream
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214 * @return a inflater stream or <code>null</code>
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215 * @exception IOException
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216 *
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217 * @since 3.3
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218 */
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219 public static InflaterInputStream newInflaterInputStream(InputStream stream) {
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220 return new InflaterInputStream(stream);
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221 }
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222
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223 /**
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224 * Answers whether the character is a letter.
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225 *
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226 * @param c the character
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227 * @return true when the character is a letter
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228 */
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229 public static bool isLetter(dchar c) {
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230 return Character.isLetter(c);
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25
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231 }
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232
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233 /**
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234 * Answers whether the character is a letter or a digit.
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235 *
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236 * @param c the character
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237 * @return true when the character is a letter or a digit
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238 */
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239 public static bool isLetterOrDigit(dchar c) {
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26
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240 return Character.isLetterOrDigit(c);
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25
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241 }
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242
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243 /**
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244 * Answers whether the character is a Unicode space character.
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245 *
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246 * @param c the character
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247 * @return true when the character is a Unicode space character
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248 */
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249 public static bool isSpaceChar(dchar c) {
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26
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250 return Character.isSpace(c);
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25
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251 }
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252
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253 /**
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254 * Answers whether the character is a whitespace character.
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255 *
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256 * @param c the character to test
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257 * @return true if the character is whitespace
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258 */
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259 public static bool isWhitespace(dchar c) {
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26
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260 return Character.isWhitespace(c);
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25
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261 }
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262
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263 /**
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264 * Execute a program in a separate platform process if the
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265 * underlying platform support this.
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266 * <p>
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267 * The new process inherits the environment of the caller.
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268 * </p>
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269 *
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270 * @param prog the name of the program to execute
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271 *
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272 * @exception ProcessException
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273 * if the program cannot be executed
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274 */
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275 public static void exec(CString prog) {
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276 version(Tango){
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277 auto proc = new Process( prog );
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278 proc.execute;
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279 } else { // Phobos
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280 implMissing( __FILE__, __LINE__ );
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281 }
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25
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282 }
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283
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284 /**
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285 * Execute progArray[0] in a separate platform process if the
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286 * underlying platform support this.
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287 * <p>
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288 * The new process inherits the environment of the caller.
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289 * <p>
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290 *
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291 * @param progArray array containing the program to execute and its arguments
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292 *
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293 * @exception ProcessException
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294 * if the program cannot be executed
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295 */
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296 public static void exec(CString[] progArray) {
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297 version(Tango){
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298 auto proc = new Process( progArray );
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299 proc.execute;
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300 } else { // Phobos
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301 implMissing( __FILE__, __LINE__ );
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302 }
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25
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303 }
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304
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305 const ImportData[] SWTMessagesBundleData = [
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306 getImportData!( "org.eclipse.swt.internal.SWTMessages.properties" ),
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307 getImportData!( "org.eclipse.swt.internal.SWTMessages_ar.properties" ),
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308 getImportData!( "org.eclipse.swt.internal.SWTMessages_cs.properties" ),
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309 getImportData!( "org.eclipse.swt.internal.SWTMessages_da.properties" ),
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310 getImportData!( "org.eclipse.swt.internal.SWTMessages_de.properties" ),
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311 getImportData!( "org.eclipse.swt.internal.SWTMessages_el.properties" ),
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312 getImportData!( "org.eclipse.swt.internal.SWTMessages_es.properties" ),
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313 getImportData!( "org.eclipse.swt.internal.SWTMessages_fi.properties" ),
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314 getImportData!( "org.eclipse.swt.internal.SWTMessages_fr.properties" ),
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315 getImportData!( "org.eclipse.swt.internal.SWTMessages_hu.properties" ),
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316 getImportData!( "org.eclipse.swt.internal.SWTMessages_it.properties" ),
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317 getImportData!( "org.eclipse.swt.internal.SWTMessages_iw.properties" ),
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318 getImportData!( "org.eclipse.swt.internal.SWTMessages_ja.properties" ),
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319 getImportData!( "org.eclipse.swt.internal.SWTMessages_ko.properties" ),
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320 getImportData!( "org.eclipse.swt.internal.SWTMessages_nl.properties" ),
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321 getImportData!( "org.eclipse.swt.internal.SWTMessages_no.properties" ),
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322 getImportData!( "org.eclipse.swt.internal.SWTMessages_pl.properties" ),
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323 getImportData!( "org.eclipse.swt.internal.SWTMessages_pt_BR.properties" ),
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324 getImportData!( "org.eclipse.swt.internal.SWTMessages_pt.properties" ),
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325 getImportData!( "org.eclipse.swt.internal.SWTMessages_ru.properties" ),
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326 getImportData!( "org.eclipse.swt.internal.SWTMessages_sv.properties" ),
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327 getImportData!( "org.eclipse.swt.internal.SWTMessages_tr.properties" ),
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328 getImportData!( "org.eclipse.swt.internal.SWTMessages_zh_HK.properties" ),
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329 getImportData!( "org.eclipse.swt.internal.SWTMessages_zh.properties" ),
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330 getImportData!( "org.eclipse.swt.internal.SWTMessages_zh_TW.properties" )
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331 ];
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332
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333 private static ResourceBundle msgs = null;
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334
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335 /**
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336 * Returns the NLS'ed message for the given argument. This is only being
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337 * called from SWT.
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338 *
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339 * @param key the key to look up
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340 * @return the message for the given key
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341 *
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342 * @see SWT#getMessage(String)
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343 */
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344 public static String getMessage(CString key) {
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345 String answer = key._idup();
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25
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346
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347 if (key is null) {
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348 SWT.error (SWT.ERROR_NULL_ARGUMENT);
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349 }
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350 if (msgs is null) {
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351 try {
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352 msgs = ResourceBundle.getBundle(SWTMessagesBundleData); //$NON-NLS-1$
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353 } catch (MissingResourceException ex) {
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354 answer = cast(String)(key ~ " (no resource bundle)"); //$NON-NLS-1$
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25
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355 }
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356 }
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357 if (msgs !is null) {
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358 try {
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359 answer = msgs.getString(key);
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360 } catch (MissingResourceException ex2) {}
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361 }
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362 return answer;
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363 }
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364
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365 public static String getMessage(CString key, Object[] args) {
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366 String answer = key._idup();
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367
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368 if (key is null || args is null) {
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369 SWT.error (SWT.ERROR_NULL_ARGUMENT);
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370 }
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371 if (msgs is null) {
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372 try {
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373 msgs = ResourceBundle.getBundle(SWTMessagesBundleData); //$NON-NLS-1$
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374 } catch (MissingResourceException ex) {
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375 answer = cast(String)(key ~ " (no resource bundle)"); //$NON-NLS-1$
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25
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376 }
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377 }
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378 if (msgs !is null) {
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379 try {
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380 String frmt = msgs.getString(key);
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25
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381 switch( args.length ){
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382 case 0: answer = Format(frmt); break;
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383 case 1: answer = Format(frmt, args[0]); break;
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384 case 2: answer = Format(frmt, args[0], args[1]); break;
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385 case 3: answer = Format(frmt, args[0], args[1], args[2]); break;
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386 case 4: answer = Format(frmt, args[0], args[1], args[2], args[3]); break;
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387 case 5: answer = Format(frmt, args[0], args[1], args[2], args[3], args[4]); break;
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388 default:
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389 implMissing(__FILE__, __LINE__ );
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390 }
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391 } catch (MissingResourceException ex2) {}
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392 }
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393 return answer;
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394 }
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395
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396
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397 /**
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398 * Interrupt the current thread.
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399 * <p>
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400 * Note that this is not available on CLDC.
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401 * </p>
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402 */
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403 public static void interrupt() {
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404 //PORTING_FIXME: how to implement??
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405 //Thread.currentThread().interrupt();
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406 }
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407
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408 /**
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409 * Compares two instances of class String ignoring the case of the
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410 * characters and answers if they are equal.
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411 *
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412 * @param s1 string
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413 * @param s2 string
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414 * @return true if the two instances of class String are equal
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415 */
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54
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416 public static bool equalsIgnoreCase(CString s1, CString s2) {
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26
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417 version(Tango){
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418 String s1b = new char[ s1.length ];
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419 String s2b = new char[ s1.length ];
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420 scope(exit){
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421 delete s1b;
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422 delete s2b;
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423 }
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424 String s1c = Unicode.toFold( s1, s1b );
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425 String s2c = Unicode.toFold( s2, s2b );
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426 return s1c == s2c;
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427 } else { // Phobos
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428 return std.string.icmp( s1, s2 ) is 0;
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25
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429 }
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430 }
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431
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432 }
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