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annotate dwt/graphics/Font.d @ 60:62202ce0039f

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Updated and fixed many modules to 3.514
author Jacob Carlborg <doob@me.com>
date Mon, 22 Dec 2008 15:10:19 +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.Font;
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16
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17 import dwt.DWT;
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18 import dwt.DWTError;
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19 import dwt.DWTException;
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20 import dwt.internal.cocoa.NSAutoreleasePool;
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21 import dwt.internal.cocoa.NSFont;
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22 import dwt.internal.cocoa.NSString;
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23 import dwt.internal.cocoa.NSThread;
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25 import tango.stdc.stringz;
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26 import tango.text.convert.Format;
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27 static import tango.text.convert.Utf;
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29 import dwt.dwthelper.utils;
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30 import dwt.graphics.Device;
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31 import dwt.graphics.FontData;
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32 import dwt.graphics.Point;
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33 import dwt.graphics.Resource;
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34 import Carbon = dwt.internal.c.Carbon;
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35
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36 /**
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37 * Instances of this class manage operating system resources that
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38 * define how text looks when it is displayed. Fonts may be constructed
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39 * by providing a device and either name, size and style information
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40 * or a <code>FontData</code> object which encapsulates this data.
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41 * <p>
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42 * Application code must explicitly invoke the <code>Font.dispose()</code>
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43 * method to release the operating system resources managed by each instance
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44 * when those instances are no longer required.
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45 * </p>
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46 *
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47 * @see FontData
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48 * @see <a href="http://www.eclipse.org/swt/snippets/#font">Font snippets</a>
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49 * @see <a href="http://www.eclipse.org/swt/examples.php">DWT Examples: GraphicsExample, PaintExample</a>
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50 * @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a>
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51 */
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52 public final class Font : Resource {
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54 alias Resource.init_ init_;
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55
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56 /**
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57 * the handle to the OS font resource
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58 * (Warning: This field is platform dependent)
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59 * <p>
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60 * <b>IMPORTANT:</b> This field is <em>not</em> part of the DWT
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61 * public API. It is marked public only so that it can be shared
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62 * within the packages provided by DWT. It is not available on all
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63 * platforms and should never be accessed from application code.
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64 * </p>
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65 */
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66 public NSFont handle;
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67
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68 this(Device device) {
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69 super(device);
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70 }
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71
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72 /**
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73 * Constructs a new font given a device and font data
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74 * which describes the desired font's appearance.
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75 * <p>
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76 * You must dispose the font when it is no longer required.
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77 * </p>
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78 *
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79 * @param device the device to create the font on
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80 * @param fd the FontData that describes the desired font (must not be null)
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81 *
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82 * @exception IllegalArgumentException <ul>
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83 * <li>ERROR_NULL_ARGUMENT - if device is null and there is no current device</li>
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84 * <li>ERROR_NULL_ARGUMENT - if the fd argument is null</li>
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85 * </ul>
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86 * @exception DWTError <ul>
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87 * <li>ERROR_NO_HANDLES - if a font could not be created from the given font data</li>
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88 * </ul>
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89 */
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90 public this(Device device, FontData fd) {
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91 super(device);
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92 if (fd is null) DWT.error(DWT.ERROR_NULL_ARGUMENT);
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93 NSAutoreleasePool pool = null;
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94 if (!NSThread.isMainThread()) pool = cast(NSAutoreleasePool) (new NSAutoreleasePool()).alloc().init();
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95 try {
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96 init_(fd.getName(), fd.getHeightF(), fd.getStyle(), fd.nsName);
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97 init_();
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98 } finally {
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99 if (pool !is null) pool.release();
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100 }
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101 }
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102
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103 /**
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104 * Constructs a new font given a device and an array
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105 * of font data which describes the desired font's
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106 * appearance.
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107 * <p>
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108 * You must dispose the font when it is no longer required.
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109 * </p>
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110 *
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111 * @param device the device to create the font on
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112 * @param fds the array of FontData that describes the desired font (must not be null)
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113 *
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114 * @exception IllegalArgumentException <ul>
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115 * <li>ERROR_NULL_ARGUMENT - if device is null and there is no current device</li>
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116 * <li>ERROR_NULL_ARGUMENT - if the fds argument is null</li>
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117 * <li>ERROR_INVALID_ARGUMENT - if the length of fds is zero</li>
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118 * <li>ERROR_NULL_ARGUMENT - if any fd in the array is null</li>
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119 * </ul>
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120 * @exception DWTError <ul>
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121 * <li>ERROR_NO_HANDLES - if a font could not be created from the given font data</li>
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122 * </ul>
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123 *
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124 * @since 2.1
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125 */
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126 public this(Device device, FontData[] fds) {
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127 super(device);
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128 if (fds is null) DWT.error(DWT.ERROR_NULL_ARGUMENT);
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129 if (fds.length is 0) DWT.error(DWT.ERROR_INVALID_ARGUMENT);
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130 for (int i=0; i<fds.length; i++) {
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131 if (fds[i] is null) DWT.error(DWT.ERROR_INVALID_ARGUMENT);
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132 }
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133 NSAutoreleasePool pool = null;
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134 if (!NSThread.isMainThread()) pool = cast(NSAutoreleasePool) (new NSAutoreleasePool()).alloc().init();
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135 try {
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136 FontData fd = fds[0];
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137 init_(fd.getName(), fd.getHeightF(), fd.getStyle(), fd.nsName);
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138 init_();
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139 } finally {
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140 if (pool !is null) pool.release();
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141 }
0
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142 }
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143
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144 /**
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145 * Constructs a new font given a device, a font name,
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146 * the height of the desired font in points, and a font
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147 * style.
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148 * <p>
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149 * You must dispose the font when it is no longer required.
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150 * </p>
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151 *
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152 * @param device the device to create the font on
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153 * @param name the name of the font (must not be null)
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154 * @param height the font height in points
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155 * @param style a bit or combination of NORMAL, BOLD, ITALIC
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156 *
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157 * @exception IllegalArgumentException <ul>
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158 * <li>ERROR_NULL_ARGUMENT - if device is null and there is no current device</li>
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159 * <li>ERROR_NULL_ARGUMENT - if the name argument is null</li>
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160 * <li>ERROR_INVALID_ARGUMENT - if the height is negative</li>
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161 * </ul>
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162 * @exception DWTError <ul>
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163 * <li>ERROR_NO_HANDLES - if a font could not be created from the given arguments</li>
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164 * </ul>
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165 */
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166 public this(Device device, String name, int height, int style) {
0
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167 super(device);
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168 NSAutoreleasePool pool = null;
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169 if (!NSThread.isMainThread()) pool = cast(NSAutoreleasePool) (new NSAutoreleasePool()).alloc().init();
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170 try {
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171 init_(name, height, style, null);
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172 init_();
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173 } finally {
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174 if (pool !is null) pool.release();
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175 }
0
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176 }
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177 //FIXME: Jacob Carlborg
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178 /*public*/ this(Device device, String name, float height, int style) {
0
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179 super(device);
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180 init_(name, height, style, null);
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181 init_();
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182 }
0
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183
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184 void destroy() {
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185 handle.release();
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186 handle = null;
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187 }
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188
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189 /**
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190 * Compares the argument to the receiver, and returns true
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191 * if they represent the <em>same</em> object using a class
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192 * specific comparison.
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193 *
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194 * @param object the object to compare with this object
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195 * @return <code>true</code> if the object is the same as this object and <code>false</code> otherwise
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196 *
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197 * @see #hashCode
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198 */
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199 public int opEquals(Object object) {
0
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200 if (object is this) return true;
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201 if (!( null !is cast(Font)object )) return false;
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202 Font font = cast(Font)object;
0
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203 return handle is font.handle;
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204 }
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205
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206 alias opEquals equals;
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207
0
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208 /**
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209 * Returns an array of <code>FontData</code>s representing the receiver.
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210 * On Windows, only one FontData will be returned per font. On X however,
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211 * a <code>Font</code> object <em>may</em> be composed of multiple X
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212 * fonts. To support this case, we return an array of font data objects.
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213 *
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214 * @return an array of font data objects describing the receiver
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215 *
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216 * @exception DWTException <ul>
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217 * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
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218 * </ul>
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219 */
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220 public FontData[] getFontData() {
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221 if (isDisposed()) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED);
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222 NSAutoreleasePool pool = null;
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223 if (!NSThread.isMainThread()) pool = cast(NSAutoreleasePool) (new NSAutoreleasePool()).alloc().init();
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224 try {
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225 NSString family = handle.familyName();
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226 String name = family.getString();
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227 NSString str = handle.fontName();
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228 String nsName = str.getString();
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229 int style = DWT.NORMAL;
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230 if (nsName.indexOf("Italic") !is -1) style |= DWT.ITALIC;
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231 if (nsName.indexOf("Bold") !is -1) style |= DWT.BOLD;
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232 Point dpi = device.dpi, screenDPI = device.getScreenDPI();
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233 FontData data = new FontData(name, cast(float)/*64*/handle.pointSize() * screenDPI.y / dpi.y, style);
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234 data.nsName = nsName;
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235 return [data];
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236 } finally {
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237 if (pool !is null) pool.release();
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238 }
0
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239 }
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240
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241 /**
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242 * Invokes platform specific functionality to allocate a new font.
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243 * <p>
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244 * <b>IMPORTANT:</b> This method is <em>not</em> part of the public
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245 * API for <code>Font</code>. It is marked public only so that it
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246 * can be shared within the packages provided by DWT. It is not
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247 * available on all platforms, and should never be called from
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248 * application code.
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249 * </p>
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250 *
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251 * @param device the device on which to allocate the color
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252 * @param handle the handle for the font
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253 * @param style the style for the font
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254 * @param size the size for the font
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255 *
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256 * @private
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257 */
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258 public static Font cocoa_new(Device device, NSFont handle) {
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259 Font font = new Font(device);
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260 font.handle = handle;
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261 font.handle.retain();
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262 return font;
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263 }
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264
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265 /**
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266 * Returns an integer hash code for the receiver. Any two
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267 * objects that return <code>true</code> when passed to
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268 * <code>equals</code> must return the same value for this
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269 * method.
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270 *
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271 * @return the receiver's hash
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272 *
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273 * @see #equals
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274 */
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275 public hash_t toHash() {
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276 return handle !is null ? cast(hash_t) handle.id : 0;
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277 }
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278
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279 alias toHash hashCode;
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280
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281 void init_(String name, float height, int style, String nsName) {
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282 //if (name is null) DWT.error(DWT.ERROR_NULL_ARGUMENT);
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283 if (height < 0) DWT.error(DWT.ERROR_INVALID_ARGUMENT);
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284 Point dpi = device.dpi, screenDPI = device.getScreenDPI();
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285 float size = height * dpi.y / screenDPI.y;
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286 if (nsName !is null) {
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287 handle = NSFont.fontWithName(NSString.stringWith(nsName), size);
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288 } else {
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289 nsName = name;
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290 if ((style & DWT.BOLD) !is 0) nsName ~= " Bold";
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291 if ((style & DWT.ITALIC) !is 0) nsName ~= " Italic";
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292 handle = NSFont.fontWithName(NSString.stringWith(nsName), size);
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293 if (handle is null && (style & DWT.ITALIC) !is 0) {
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294 nsName = name;
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295 if ((style & DWT.BOLD) !is 0) nsName ~= " Bold";
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296 handle = NSFont.fontWithName(NSString.stringWith(nsName), size);
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297 }
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298 if (handle is null && (style & DWT.BOLD) !is 0) {
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299 nsName = name;
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300 handle = NSFont.fontWithName(NSString.stringWith(nsName), size);
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301 }
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302 }
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303 if (handle is null) {
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304 handle = device.systemFont.handle;
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305 }
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306 handle.retain();
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307 }
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308
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309 /**
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310 * Returns <code>true</code> if the font has been disposed,
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311 * and <code>false</code> otherwise.
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312 * <p>
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313 * This method gets the dispose state for the font.
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314 * When a font has been disposed, it is an error to
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315 * invoke any other method using the font.
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316 *
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317 * @return <code>true</code> when the font is disposed and <code>false</code> otherwise
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318 */
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319 public bool isDisposed() {
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320 return handle is null;
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321 }
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322
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323 /**
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324 * Returns a string containing a concise, human-readable
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325 * description of the receiver.
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326 *
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327 * @return a string representation of the receiver
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328 */
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329 public String toString () {
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330 if (isDisposed()) return "Font {*DISPOSED*}";
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331 return Format("Font {{}{}" , handle , "}");
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332 }
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333
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334 }