annotate dwt/graphics/TextStyle.d @ 45:d8635bb48c7c

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date Mon, 01 Dec 2008 17:07:00 +0100
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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 *
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11 * Port to the D programming language:
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12 * Jacob Carlborg <doob@me.com>
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13 *******************************************************************************/
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14 module dwt.graphics.TextStyle;
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16 import dwt.DWT;
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18 import dwt.dwthelper.utils;
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19 import dwt.graphics.Color;
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20 import dwt.graphics.Font;
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21 import dwt.graphics.GlyphMetrics;
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23 /**
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24 * <code>TextStyle</code> defines a set of styles that can be applied
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25 * to a range of text.
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26 * <p>
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27 * The hashCode() method in this class uses the values of the public
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28 * fields to compute the hash value. When storing instances of the
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29 * class in hashed collections, do not modify these fields after the
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30 * object has been inserted.
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31 * </p>
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32 * <p>
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33 * Application code does <em>not</em> need to explicitly release the
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34 * resources managed by each instance when those instances are no longer
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35 * required, and thus no <code>dispose()</code> method is provided.
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36 * </p>
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37 *
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38 * @see TextLayout
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39 * @see Font
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40 * @see Color
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41 * @see <a href="http://www.eclipse.org/swt/snippets/#textlayout">TextLayout, TextStyle snippets</a>
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42 * @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a>
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43 *
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44 * @since 3.0
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45 */
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46 public class TextStyle {
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47
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48 /**
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49 * the font of the style
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50 */
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51 public Font font;
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52
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53 /**
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54 * the foreground of the style
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55 */
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56 public Color foreground;
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57
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58 /**
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59 * the background of the style
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60 */
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61 public Color background;
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62
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63 /**
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64 * the underline flag of the style. The default underline
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65 * style is <code>DWT.UNDERLINE_SINGLE</code>.
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66 *
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67 *
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68 * @since 3.1
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69 */
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70 public bool underline;
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71
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72 /**
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73 * the underline color of the style
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74 *
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75 * @since 3.4
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76 */
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77 public Color underlineColor;
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78
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79 /**
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80 * the underline style. This style is ignored when
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81 * <code>underline</code> is false.
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82 * <p>
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83 * This value should be one of <code>DWT.UNDERLINE_SINGLE</code>,
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84 * <code>DWT.UNDERLINE_DOUBLE</code>, <code>DWT.UNDERLINE_ERROR</code>,
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85 * or <code>DWT.UNDERLINE_SQUIGGLE</code>.
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86 * </p>
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87 *
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88 * @see DWT#UNDERLINE_SINGLE
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89 * @see DWT#UNDERLINE_DOUBLE
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90 * @see DWT#UNDERLINE_ERROR
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91 * @see DWT#UNDERLINE_SQUIGGLE
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92 *
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93 * @since 3.4
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94 */
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95 public int underlineStyle;
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96
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97 /**
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98 * the strikeout flag of the style
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99 *
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100 * @since 3.1
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101 */
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102 public bool strikeout;
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103
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104 /**
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105 * the strikeout color of the style
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106 *
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107 * @since 3.4
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108 */
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109 public Color strikeoutColor;
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110
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111 /**
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112 * the border style. The default border style is <code>DWT.NONE</code>.
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113 * <p>
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114 * This value should be one of <code>DWT.BORDER_SOLID</code>,
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115 * <code>DWT.BORDER_DASH</code>,<code>DWT.BORDER_DOT</code> or
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116 * <code>DWT.NONE</code>.
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117 * </p>
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118 *
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119 * @see DWT#BORDER_SOLID
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120 * @see DWT#BORDER_DASH
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121 * @see DWT#BORDER_DOT
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122 * @see DWT#NONE
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123 *
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124 * @since 3.4
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125 */
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126 public int borderStyle;
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127
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128 /**
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129 * the border color of the style
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130 *
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131 * @since 3.4
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132 */
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133 public Color borderColor;
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134
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135 /**
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136 * the GlyphMetrics of the style
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137 *
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138 * @since 3.2
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139 */
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140 public GlyphMetrics metrics;
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141
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142 /**
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143 * the baseline rise of the style.
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144 *
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145 * @since 3.2
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146 */
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147 public int rise;
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148
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149 /**
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150 * Create an empty text style.
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151 *
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152 * @since 3.4
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153 */
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154 public this () {
0
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155 }
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156
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157 /**
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158 * Create a new text style with the specified font, foreground
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159 * and background.
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160 *
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161 * @param font the font of the style, <code>null</code> if none
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162 * @param foreground the foreground color of the style, <code>null</code> if none
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163 * @param background the background color of the style, <code>null</code> if none
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164 */
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165 public this (Font font, Color foreground, Color background) {
0
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166 if (font !is null && font.isDisposed()) DWT.error (DWT.ERROR_INVALID_ARGUMENT);
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167 if (foreground !is null && foreground.isDisposed()) DWT.error (DWT.ERROR_INVALID_ARGUMENT);
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168 if (background !is null && background.isDisposed()) DWT.error (DWT.ERROR_INVALID_ARGUMENT);
0
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169 this.font = font;
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170 this.foreground = foreground;
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171 this.background = background;
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172 }
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173
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174
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175 /**
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176 * Create a new text style from an existing text style.
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177 *
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178 * @param style the style to copy
0
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179 *
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180 * @since 3.4
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181 */
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182 public this (TextStyle style) {
0
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183 if (style is null) DWT.error (DWT.ERROR_INVALID_ARGUMENT);
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184 font = style.font;
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185 foreground = style.foreground;
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186 background = style.background;
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187 underline = style.underline;
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188 underlineColor = style.underlineColor;
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189 underlineStyle = style.underlineStyle;
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190 strikeout = style.strikeout;
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191 strikeoutColor = style.strikeoutColor;
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192 borderStyle = style.borderStyle;
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193 borderColor = style.borderColor;
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194 metrics = style.metrics;
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195 rise = style.rise;
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196 }
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197
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198 /**
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199 * Compares the argument to the receiver, and returns true
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200 * if they represent the <em>same</em> object using a class
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201 * specific comparison.
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202 *
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203 * @param object the object to compare with this object
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204 * @return <code>true</code> if the object is the same as this object and <code>false</code> otherwise
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205 *
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206 * @see #hashCode()
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207 */
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208 public int opEquals(Object object) {
0
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209 if (object is this) return true;
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210 if (object is null) return false;
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211 if (!( null !is cast(TextStyle)object )) return false;
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212 TextStyle style = cast(TextStyle)object;
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213 if (foreground !is null) {
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214 if (!foreground.equals(style.foreground)) return false;
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215 } else if (style.foreground !is null) return false;
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216 if (background !is null) {
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217 if (!background.equals(style.background)) return false;
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218 } else if (style.background !is null) return false;
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219 if (font !is null) {
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220 if (!font.equals(style.font)) return false;
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221 } else if (style.font !is null) return false;
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222 if (metrics !is null || style.metrics !is null) return false;
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223 if (underline !is style.underline) return false;
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224 if (underlineStyle !is style.underlineStyle) return false;
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225 if (borderStyle !is style.borderStyle) return false;
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226 if (strikeout !is style.strikeout) return false;
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227 if (rise !is style.rise) return false;
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228 if (underlineColor !is null) {
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229 if (!underlineColor.equals(style.underlineColor)) return false;
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230 } else if (style.underlineColor !is null) return false;
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231 if (strikeoutColor !is null) {
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232 if (!strikeoutColor.equals(style.strikeoutColor)) return false;
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233 } else if (style.strikeoutColor !is null) return false;
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234 if (underlineStyle !is style.underlineStyle) return false;
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235 if (borderColor !is null) {
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236 if (!borderColor.equals(style.borderColor)) return false;
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237 } else if (style.borderColor !is null) return false;
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238 return true;
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239 }
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240
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241 alias opEquals equals;
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242
0
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243 /**
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244 * Returns an integer hash code for the receiver. Any two
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245 * objects that return <code>true</code> when passed to
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246 * <code>equals</code> must return the same value for this
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247 * method.
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248 *
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249 * @return the receiver's hash
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250 *
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251 * @see #equals(Object)
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252 */
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253 public hash_t toHash() {
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diff changeset
254 hash_t hash = 0;
0
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255 if (foreground !is null) hash ^= foreground.hashCode();
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256 if (background !is null) hash ^= background.hashCode();
0
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257 if (font !is null) hash ^= font.hashCode();
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258 if (metrics !is null) hash ^= metrics.hashCode();
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259 if (underline) hash ^= hash;
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260 if (strikeout) hash ^= hash;
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261 hash ^= rise;
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262 if (underlineColor !is null) hash ^= underlineColor.hashCode();
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263 if (strikeoutColor !is null) hash ^= strikeoutColor.hashCode();
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264 if (borderColor !is null) hash ^= borderColor.hashCode();
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265 hash ^= underlineStyle;
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266 return hash;
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267 }
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268
33
965ac0a77267 Ported a couple of modules in dwt.graphics
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269 alias toHash hashCode;
965ac0a77267 Ported a couple of modules in dwt.graphics
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270
0
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271 bool isAdherentBorder(TextStyle style) {
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272 if (this is style) return true;
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273 if (style is null) return false;
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274 if (borderStyle !is style.borderStyle) return false;
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275 if (borderColor !is null) {
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276 if (!borderColor.equals(style.borderColor)) return false;
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277 } else {
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278 if (style.borderColor !is null) return false;
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279 if (foreground !is null) {
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280 if (!foreground.equals(style.foreground)) return false;
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281 } else if (style.foreground !is null) return false;
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282 }
0
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283 return true;
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284 }
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285
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286 bool isAdherentUnderline(TextStyle style) {
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287 if (this is style) return true;
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288 if (style is null) return false;
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289 if (underline !is style.underline) return false;
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290 if (underlineStyle !is style.underlineStyle) return false;
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291 if (underlineColor !is null) {
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292 if (!underlineColor.equals(style.underlineColor)) return false;
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293 } else {
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294 if (style.underlineColor !is null) return false;
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295 if (foreground !is null) {
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296 if (!foreground.equals(style.foreground)) return false;
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297 } else if (style.foreground !is null) return false;
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298 }
0
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299 return true;
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300 }
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301
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302 bool isAdherentStrikeout(TextStyle style) {
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303 if (this is style) return true;
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304 if (style is null) return false;
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305 if (strikeout !is style.strikeout) return false;
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306 if (strikeoutColor !is null) {
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307 if (!strikeoutColor.equals(style.strikeoutColor)) return false;
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308 } else {
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309 if (style.strikeoutColor !is null) return false;
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310 if (foreground !is null) {
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311 if (!foreground.equals(style.foreground)) return false;
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312 } else if (style.foreground !is null) return false;
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313 }
0
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314 return true;
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315 }
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316
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317 /**
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318 * Returns a string containing a concise, human-readable
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319 * description of the receiver.
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320 *
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321 * @return a string representation of the <code>TextStyle</code>
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322 */
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323 public String toString () {
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324 StringBuffer buffer = new StringBuffer("TextStyle {");
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325 int startLength = buffer.length();
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326 if (font !is null) {
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327 if (buffer.length() > startLength) buffer.append(", ");
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328 buffer.append("font=");
37
642f460a0908 Fixed a lot of compile errors, a "hello world" app compiles now
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diff changeset
329 buffer.append(font.toString);
0
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330 }
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331 if (foreground !is null) {
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diff changeset
332 if (buffer.length() > startLength) buffer.append(", ");
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parents:
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333 buffer.append("foreground=");
37
642f460a0908 Fixed a lot of compile errors, a "hello world" app compiles now
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents: 36
diff changeset
334 buffer.append(foreground.toString);
0
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335 }
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336 if (background !is null) {
380af2bdd8e5 Upload of whole dwt tree
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parents:
diff changeset
337 if (buffer.length() > startLength) buffer.append(", ");
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parents:
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338 buffer.append("background=");
37
642f460a0908 Fixed a lot of compile errors, a "hello world" app compiles now
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents: 36
diff changeset
339 buffer.append(background.toString);
0
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340 }
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parents:
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341 if (underline) {
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parents:
diff changeset
342 if (buffer.length() > startLength) buffer.append(", ");
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343 buffer.append("underlined");
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344 }
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345 if (strikeout) {
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parents:
diff changeset
346 if (buffer.length() > startLength) buffer.append(", ");
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diff changeset
347 buffer.append("striked out");
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348 }
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349 if (rise !is 0) {
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Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
350 if (buffer.length() > startLength) buffer.append(", ");
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parents:
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351 buffer.append("rise=");
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352 buffer.append(rise);
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
353 }
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
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354 if (metrics !is null) {
380af2bdd8e5 Upload of whole dwt tree
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
355 if (buffer.length() > startLength) buffer.append(", ");
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parents:
diff changeset
356 buffer.append("metrics=");
37
642f460a0908 Fixed a lot of compile errors, a "hello world" app compiles now
Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents: 36
diff changeset
357 buffer.append(metrics.toString);
0
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parents:
diff changeset
358 }
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parents:
diff changeset
359 buffer.append("}");
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Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
parents:
diff changeset
360 return buffer.toString();
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parents:
diff changeset
361 }
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parents:
diff changeset
362
380af2bdd8e5 Upload of whole dwt tree
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parents:
diff changeset
363 }