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1 /*******************************************************************************
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2 * Copyright (c) 2000, 2006 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.text.TextAttribute;
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14
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15 import dwt.dwthelper.utils;
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16
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17
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18 import dwt.DWT;
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19 import dwt.graphics.Color;
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20 import dwt.graphics.Font;
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21
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22
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23 /**
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24 * Description of textual attributes such as color and style. Text attributes
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25 * are considered value objects.
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26 * <p>
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27 * Clients usually instantiate object of the class.</p>
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28 */
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29 public class TextAttribute {
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30
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31 /**
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32 * Text attribute for strikethrough style.
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33 * (value <code>1 << 29</code>).
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34 * @since 3.1
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35 */
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36 public static final int STRIKETHROUGH= 1 << 29;
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37
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38 /**
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39 * Text attribute for underline style.
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40 * (value <code>1 << 30</code>)
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41 * @since 3.1
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42 */
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43 public static final int UNDERLINE= 1 << 30;
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44
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45
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46 /** Foreground color */
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47 private Color foreground;
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48
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49 /** Background color */
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50 private Color background;
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51
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52 /** The text style */
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53 private int style;
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54
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55 /**
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56 * The text font.
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57 * @since 3.3
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58 */
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59 private Font font;
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60
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61 /**
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62 * Cached hash code.
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63 * @since 3.3
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64 */
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65 private int fHashCode;
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66
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67 /**
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68 * Creates a text attribute with the given colors and style.
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69 *
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70 * @param foreground the foreground color, <code>null</code> if none
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71 * @param background the background color, <code>null</code> if none
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72 * @param style the style
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73 */
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74 public TextAttribute(Color foreground, Color background, int style) {
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75 this.foreground= foreground;
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76 this.background= background;
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77 this.style= style;
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78 }
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79
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80 /**
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81 * Creates a text attribute with the given colors and style.
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82 *
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83 * @param foreground the foreground color, <code>null</code> if none
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84 * @param background the background color, <code>null</code> if none
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85 * @param style the style
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86 * @param font the font, <code>null</code> if none
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87 * @since 3.3
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88 */
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89 public TextAttribute(Color foreground, Color background, int style, Font font) {
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90 this.foreground= foreground;
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91 this.background= background;
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92 this.style= style;
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93 this.font= font;
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94 }
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95
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96 /**
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97 * Creates a text attribute for the given foreground color, no background color and
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98 * with the DWT normal style.
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99 *
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100 * @param foreground the foreground color, <code>null</code> if none
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101 */
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102 public TextAttribute(Color foreground) {
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103 this(foreground, null, DWT.NORMAL);
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104 }
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105
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106 /*
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107 * @see Object#equals(Object)
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108 */
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109 public bool equals(Object object) {
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110
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111 if (object is this)
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112 return true;
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113
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114 if (!(object instanceof TextAttribute))
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115 return false;
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116 TextAttribute a= (TextAttribute)object;
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117
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118 return (a.style is style && equals(a.foreground, foreground) && equals(a.background, background) && equals(a.font, font));
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119 }
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120
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121 /**
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122 * Returns whether the two given objects are equal.
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123 *
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124 * @param o1 the first object, can be <code>null</code>
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125 * @param o2 the second object, can be <code>null</code>
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126 * @return <code>true</code> if the given objects are equals
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127 * @since 2.0
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128 */
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129 private bool equals(Object o1, Object o2) {
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130 if (o1 !is null)
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131 return o1.equals(o2);
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132 return (o2 is null);
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133 }
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134
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135 /*
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136 * @see Object#hashCode()
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137 */
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138 public int hashCode() {
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139 if (fHashCode is 0) {
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140 int multiplier= 37; // some prime
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141 fHashCode= 13; // some random value
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142 fHashCode= multiplier * fHashCode + (font is null ? 0 : font.hashCode());
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143 fHashCode= multiplier * fHashCode + (background is null ? 0 : background.hashCode());
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144 fHashCode= multiplier * fHashCode + (foreground is null ? 0 : foreground.hashCode());
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145 fHashCode= multiplier * fHashCode + style;
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146 }
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147 return fHashCode;
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148 }
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149
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150 /**
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151 * Returns the attribute's foreground color.
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152 *
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153 * @return the attribute's foreground color or <code>null</code> if not set
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154 */
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155 public Color getForeground() {
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156 return foreground;
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157 }
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158
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159 /**
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160 * Returns the attribute's background color.
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161 *
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162 * @return the attribute's background color or <code>null</code> if not set
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163 */
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164 public Color getBackground() {
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165 return background;
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166 }
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167
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168 /**
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169 * Returns the attribute's style.
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170 *
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171 * @return the attribute's style
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172 */
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173 public int getStyle() {
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174 return style;
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175 }
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176
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177 /**
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178 * Returns the attribute's font.
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179 *
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180 * @return the attribute's font or <code>null</code> if not set
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181 * @since 3.3
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182 */
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183 public Font getFont() {
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184 return font;
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185 }
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186 }
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