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annotate dwt/graphics/Font.d @ 37:642f460a0908

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Fixed a lot of compile errors, a "hello world" app compiles now
author Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
date Fri, 10 Oct 2008 12:29:48 +0200
parents db5a898b2119
children d8635bb48c7c
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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 *
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11 * Port to the D programming language:
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12 * Jacob Carlborg <jacob.carlborg@gmail.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.NSFont;
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21 import dwt.internal.cocoa.NSString;
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23 import tango.stdc.stringz;
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24 import tango.text.convert.Format;
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25 static import tango.text.convert.Utf;
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27 import dwt.dwthelper.utils;
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28 import dwt.graphics.Device;
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29 import dwt.graphics.FontData;
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30 import dwt.graphics.Resource;
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31 import dwt.internal.cocoa.CGFloat;
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32
0
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33 /**
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34 * Instances of this class manage operating system resources that
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35 * define how text looks when it is displayed. Fonts may be constructed
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36 * by providing a device and either name, size and style information
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37 * or a <code>FontData</code> object which encapsulates this data.
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38 * <p>
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39 * Application code must explicitly invoke the <code>Font.dispose()</code>
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40 * method to release the operating system resources managed by each instance
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41 * when those instances are no longer required.
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42 * </p>
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43 *
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44 * @see FontData
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45 */
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46 public final class Font : Resource {
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47
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48 alias Resource.init_ init_;
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49
0
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50 /**
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51 * the handle to the OS font resource
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52 * (Warning: This field is platform dependent)
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53 * <p>
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54 * <b>IMPORTANT:</b> This field is <em>not</em> part of the DWT
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55 * public API. It is marked public only so that it can be shared
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56 * within the packages provided by DWT. It is not available on all
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57 * platforms and should never be accessed from application code.
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58 * </p>
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59 */
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60 public NSFont handle;
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61
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62 this(Device device) {
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63 super(device);
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64 }
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65
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66 /**
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67 * Constructs a new font given a device and font data
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68 * which describes the desired font's appearance.
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69 * <p>
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70 * You must dispose the font when it is no longer required.
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71 * </p>
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72 *
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73 * @param device the device to create the font on
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74 * @param fd the FontData that describes the desired font (must not be null)
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75 *
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76 * @exception IllegalArgumentException <ul>
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77 * <li>ERROR_NULL_ARGUMENT - if device is null and there is no current device</li>
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78 * <li>ERROR_NULL_ARGUMENT - if the fd argument is null</li>
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79 * </ul>
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80 * @exception DWTError <ul>
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81 * <li>ERROR_NO_HANDLES - if a font could not be created from the given font data</li>
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82 * </ul>
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83 */
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84 public this(Device device, FontData fd) {
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85 super(device);
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86 if (fd is null) DWT.error(DWT.ERROR_NULL_ARGUMENT);
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87 init_(fd.getName(), fd.getHeightF(), fd.getStyle(), fd.nsName);
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88 init_();
0
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89 }
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90
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91 /**
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92 * Constructs a new font given a device and an array
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93 * of font data which describes the desired font's
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94 * appearance.
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95 * <p>
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96 * You must dispose the font when it is no longer required.
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97 * </p>
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98 *
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99 * @param device the device to create the font on
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100 * @param fds the array of FontData that describes the desired font (must not be null)
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101 *
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102 * @exception IllegalArgumentException <ul>
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103 * <li>ERROR_NULL_ARGUMENT - if device is null and there is no current device</li>
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104 * <li>ERROR_NULL_ARGUMENT - if the fds argument is null</li>
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105 * <li>ERROR_INVALID_ARGUMENT - if the length of fds is zero</li>
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106 * <li>ERROR_NULL_ARGUMENT - if any fd in the array is null</li>
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107 * </ul>
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108 * @exception DWTError <ul>
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109 * <li>ERROR_NO_HANDLES - if a font could not be created from the given font data</li>
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110 * </ul>
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111 *
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112 * @since 2.1
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113 */
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114 public this(Device device, FontData[] fds) {
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115 super(device);
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116 if (fds is null) DWT.error(DWT.ERROR_NULL_ARGUMENT);
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117 if (fds.length is 0) DWT.error(DWT.ERROR_INVALID_ARGUMENT);
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118 for (int i=0; i<fds.length; i++) {
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119 if (fds[i] is null) DWT.error(DWT.ERROR_INVALID_ARGUMENT);
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120 }
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121 FontData fd = fds[0];
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122 init_(fd.getName(), fd.getHeightF(), fd.getStyle(), fd.nsName);
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123 init_();
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124 }
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125
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126 /**
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127 * Constructs a new font given a device, a font name,
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128 * the height of the desired font in points, and a font
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129 * style.
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130 * <p>
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131 * You must dispose the font when it is no longer required.
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132 * </p>
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133 *
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134 * @param device the device to create the font on
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135 * @param name the name of the font (must not be null)
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136 * @param height the font height in points
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137 * @param style a bit or combination of NORMAL, BOLD, ITALIC
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138 *
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139 * @exception IllegalArgumentException <ul>
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140 * <li>ERROR_NULL_ARGUMENT - if device is null and there is no current device</li>
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141 * <li>ERROR_NULL_ARGUMENT - if the name argument is null</li>
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142 * <li>ERROR_INVALID_ARGUMENT - if the height is negative</li>
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143 * </ul>
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144 * @exception DWTError <ul>
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145 * <li>ERROR_NO_HANDLES - if a font could not be created from the given arguments</li>
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146 * </ul>
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147 */
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148 public this(Device device, String name, int height, int style) {
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149 super(device);
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150 init_(name, height, style, null);
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151 init_();
0
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152 }
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153
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154 /+/*public*/ this(Device device, String name, float height, int style) {
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155 super(device);
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156 init_(name, height, style, null);
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157 init_();
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158 }+/
0
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159
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160 void destroy() {
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161 handle.release();
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162 handle = null;
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163 }
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164
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165 /**
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166 * Compares the argument to the receiver, and returns true
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167 * if they represent the <em>same</em> object using a class
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168 * specific comparison.
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169 *
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170 * @param object the object to compare with this object
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171 * @return <code>true</code> if the object is the same as this object and <code>false</code> otherwise
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172 *
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173 * @see #hashCode
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174 */
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175 public int opEquals(Object object) {
0
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176 if (object is this) return true;
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177 if (!( null !is cast(Font)object )) return false;
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178 Font font = cast(Font)object;
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179 return handle is font.handle;
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180 }
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181
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182 alias opEquals equals;
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183
0
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184 /**
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185 * Returns an array of <code>FontData</code>s representing the receiver.
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186 * On Windows, only one FontData will be returned per font. On X however,
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187 * a <code>Font</code> object <em>may</em> be composed of multiple X
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188 * fonts. To support this case, we return an array of font data objects.
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189 *
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190 * @return an array of font data objects describing the receiver
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191 *
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192 * @exception DWTException <ul>
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193 * <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed</li>
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194 * </ul>
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195 */
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196 public FontData[] getFontData() {
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197 if (isDisposed()) DWT.error(DWT.ERROR_GRAPHIC_DISPOSED);
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198 NSString family = handle.familyName();
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199 wchar[] buffer1 = new wchar[family.length()];
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200 family.getCharacters_(buffer1.ptr);
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201 String name = tango.text.convert.Utf.toString(buffer1).dup;
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202 NSString str = handle.fontName();
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203 wchar[] buffer = new wchar[str.length()];
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204 str.getCharacters_(buffer.ptr);
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205 String nsName = tango.text.convert.Utf.toString(buffer).dup;
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206 int style = DWT.NORMAL;
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207 if (nsName.indexOf("Italic") !is -1) style |= DWT.ITALIC;
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208 if (nsName.indexOf("Bold") !is -1) style |= DWT.BOLD;
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209 FontData data = new FontData(name, handle.pointSize(), style);
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210 data.nsName = nsName;
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211 return [data];
0
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212 }
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213
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214 /**
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215 * Invokes platform specific functionality to allocate a new font.
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216 * <p>
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217 * <b>IMPORTANT:</b> This method is <em>not</em> part of the public
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218 * API for <code>Font</code>. It is marked public only so that it
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219 * can be shared within the packages provided by DWT. It is not
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220 * available on all platforms, and should never be called from
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221 * application code.
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222 * </p>
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223 *
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224 * @param device the device on which to allocate the color
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225 * @param handle the handle for the font
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226 * @param style the style for the font
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227 * @param size the size for the font
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228 *
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229 * @private
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230 */
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231 public static Font cocoa_new(Device device, NSFont handle) {
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232 Font font = new Font(device);
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233 font.handle = handle;
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234 return font;
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235 }
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236
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237 /**
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238 * Returns an integer hash code for the receiver. Any two
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239 * objects that return <code>true</code> when passed to
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240 * <code>equals</code> must return the same value for this
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241 * method.
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242 *
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243 * @return the receiver's hash
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244 *
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245 * @see #equals
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246 */
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247 public hash_t toHash() {
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248 return handle !is null ? cast(hash_t) handle.id_ : 0;
0
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249 }
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250
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251 alias toHash hashCode;
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252
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253 void init_(String name, float height, int style, String nsName) {
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254 //if (name is null) DWT.error(DWT.ERROR_NULL_ARGUMENT);
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255 if (height < 0) DWT.error(DWT.ERROR_INVALID_ARGUMENT);
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256 if (nsName !is null) {
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257 handle = NSFont.static_fontWithName_size_(NSString.stringWith(nsName), cast(CGFloat) height);
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258 } else {
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259 nsName = name;
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260 if ((style & DWT.BOLD) !is 0) nsName ~= " Bold";
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261 if ((style & DWT.ITALIC) !is 0) nsName ~= " Italic";
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262 handle = NSFont.static_fontWithName_size_(NSString.stringWith(nsName), cast(CGFloat) height);
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263 if (handle is null && (style & DWT.ITALIC) !is 0) {
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264 nsName = name;
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265 if ((style & DWT.BOLD) !is 0) nsName ~= " Bold";
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266 handle = NSFont.static_fontWithName_size_(NSString.stringWith(nsName), cast(CGFloat) height);
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267 }
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268 if (handle is null && (style & DWT.BOLD) !is 0) {
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269 nsName = name;
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270 handle = NSFont.static_fontWithName_size_(NSString.stringWith(nsName), cast(CGFloat) height);
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271 }
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272 }
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273 if (handle is null) {
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274 handle = device.systemFont.handle;
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275 }
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276 handle.retain();
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277 }
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278
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279 /**
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280 * Returns <code>true</code> if the font has been disposed,
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281 * and <code>false</code> otherwise.
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282 * <p>
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283 * This method gets the dispose state for the font.
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284 * When a font has been disposed, it is an error to
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285 * invoke any other method using the font.
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286 *
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287 * @return <code>true</code> when the font is disposed and <code>false</code> otherwise
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288 */
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289 public bool isDisposed() {
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290 return handle is null;
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291 }
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292
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293 /**
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294 * Returns a string containing a concise, human-readable
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295 * description of the receiver.
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296 *
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297 * @return a string representation of the receiver
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298 */
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299 public String toString () {
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300 if (isDisposed()) return "Font {*DISPOSED*}";
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301 return Format("Font {{}{}" , handle , "}");
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302 }
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303
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304 }