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annotate org.eclipse.jface/src/org/eclipse/jface/viewers/DecorationOverlayIcon.d @ 12:bc29606a740c

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Added dwt-addons in original directory structure of eclipse.org
author Frank Benoit <benoit@tionex.de>
date Sat, 14 Mar 2009 18:23:29 +0100
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1 /*******************************************************************************
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2 * Copyright (c) 2006, 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 * Port to the D programming language:
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11 * Frank Benoit <benoit@tionex.de>
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12 *******************************************************************************/
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13 module org.eclipse.jface.viewers.DecorationOverlayIcon;
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14
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15 import org.eclipse.jface.viewers.IDecoration;
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16 import org.eclipse.jface.util.Util;
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17
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18 // import tango.util.Arrays;
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19
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20 import org.eclipse.swt.graphics.Image;
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21 import org.eclipse.swt.graphics.ImageData;
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22 import org.eclipse.swt.graphics.Point;
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23 import org.eclipse.jface.resource.CompositeImageDescriptor;
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24 import org.eclipse.jface.resource.ImageDescriptor;
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25
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26 import java.lang.all;
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27 import java.util.Arrays;
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28
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29 /**
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30 * A <code>DecorationOverlayIcon</code> is an image descriptor that can be used
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31 * to overlay decoration images on to the 4 corner quadrants of a base image.
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32 * The four quadrants are {@link IDecoration#TOP_LEFT}, {@link IDecoration#TOP_RIGHT},
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33 * {@link IDecoration#BOTTOM_LEFT} and {@link IDecoration#BOTTOM_RIGHT}. Additionally,
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34 * the overlay can be used to provide an underlay corresponding to {@link IDecoration#UNDERLAY}.
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35 *
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36 * @since 3.3
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37 * @see IDecoration
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38 */
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39 public class DecorationOverlayIcon : CompositeImageDescriptor {
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40
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41 // the base image
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42 private Image base;
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43
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44 // the overlay images
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45 private ImageDescriptor[] overlays;
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46
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47 // the size
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48 private Point size;
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49
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50 /**
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51 * Create the decoration overlay for the base image using the array of
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52 * provided overlays. The indices of the array correspond to the values
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53 * of the 5 overlay constants defined on {@link IDecoration}
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54 * ({@link IDecoration#TOP_LEFT}, {@link IDecoration#TOP_RIGHT},
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55 * {@link IDecoration#BOTTOM_LEFT}, {@link IDecoration#BOTTOM_RIGHT}
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56 * and{@link IDecoration#UNDERLAY}).
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57 *
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58 * @param baseImage the base image
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59 * @param overlaysArray the overlay images
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60 * @param sizeValue the size of the resulting image
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61 */
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62 public this(Image baseImage,
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63 ImageDescriptor[] overlaysArray, Point sizeValue) {
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64 this.base = baseImage;
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65 this.overlays = overlaysArray;
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66 this.size = sizeValue;
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67 }
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68
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69 /**
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70 * Create the decoration overlay for the base image using the array of
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71 * provided overlays. The indices of the array correspond to the values
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72 * of the 5 overlay constants defined on {@link IDecoration}
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73 * ({@link IDecoration#TOP_LEFT}, {@link IDecoration#TOP_RIGHT},
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74 * {@link IDecoration#BOTTOM_LEFT}, {@link IDecoration#BOTTOM_RIGHT}
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75 * and {@link IDecoration#UNDERLAY}).
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76 *
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77 * @param baseImage the base image
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78 * @param overlaysArray the overlay images
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79 */
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80 public this(Image baseImage, ImageDescriptor[] overlaysArray) {
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81 this(baseImage, overlaysArray, new Point(baseImage.getBounds().width, baseImage.getBounds().height));
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82 }
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83
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84 /**
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85 * Create a decoration overlay icon that will place the given overlay icon in
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86 * the given quadrant of the base image.
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87 * @param baseImage the base image
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88 * @param overlayImage the overlay image
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89 * @param quadrant the quadrant (one of {@link IDecoration}
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90 * ({@link IDecoration#TOP_LEFT}, {@link IDecoration#TOP_RIGHT},
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91 * {@link IDecoration#BOTTOM_LEFT}, {@link IDecoration#BOTTOM_RIGHT}
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92 * or {@link IDecoration#UNDERLAY})
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93 */
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94 public this(Image baseImage, ImageDescriptor overlayImage, int quadrant) {
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95 this(baseImage, createArrayFrom(overlayImage, quadrant));
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96 }
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97
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98 /**
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99 * Convert the given image and quadrant into the proper input array.
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100 * @param overlayImage the overlay image
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101 * @param quadrant the quadrant
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102 * @return an array with the given image in the proper quadrant
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103 */
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104 private static ImageDescriptor[] createArrayFrom(
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105 ImageDescriptor overlayImage, int quadrant) {
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106 ImageDescriptor[] descs = [ cast(ImageDescriptor) null, null, null, null, null ];
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107 descs[quadrant] = overlayImage;
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108 return descs;
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109 }
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110
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111 /**
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112 * Draw the overlays for the receiver.
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113 * @param overlaysArray
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114 */
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115 private void drawOverlays(ImageDescriptor[] overlaysArray) {
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116
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117 for (int i = 0; i < overlays.length; i++) {
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118 ImageDescriptor overlay = overlaysArray[i];
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119 if (overlay is null) {
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120 continue;
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121 }
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122 ImageData overlayData = overlay.getImageData();
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123 //Use the missing descriptor if it is not there.
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124 if (overlayData is null) {
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125 overlayData = ImageDescriptor.getMissingImageDescriptor()
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126 .getImageData();
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127 }
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128 switch (i) {
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129 case IDecoration.TOP_LEFT:
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130 drawImage(overlayData, 0, 0);
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131 break;
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132 case IDecoration.TOP_RIGHT:
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133 drawImage(overlayData, size.x - overlayData.width, 0);
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134 break;
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135 case IDecoration.BOTTOM_LEFT:
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136 drawImage(overlayData, 0, size.y - overlayData.height);
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137 break;
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138 case IDecoration.BOTTOM_RIGHT:
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139 drawImage(overlayData, size.x - overlayData.width, size.y
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140 - overlayData.height);
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141 break;
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142 default:
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143 }
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144 }
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145 }
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146
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147 /* (non-Javadoc)
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148 * @see java.lang.Object#equals(java.lang.Object)
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149 */
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150 public override int opEquals(Object o) {
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151 if (!( cast(DecorationOverlayIcon)o )) {
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152 return false;
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153 }
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154 DecorationOverlayIcon other = cast(DecorationOverlayIcon) o;
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155 return base.opEquals(other.base)
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156 && Util.opEquals(overlays, other.overlays);
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157 }
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158
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159 /* (non-Javadoc)
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160 * @see java.lang.Object#hashCode()
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161 */
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162 public override hash_t toHash() {
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163 int code = System.identityHashCode(base);
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164 for (int i = 0; i < overlays.length; i++) {
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165 if (overlays[i] !is null) {
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166 code ^= overlays[i].toHash();
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167 }
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168 }
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169 return code;
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170 }
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171
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172 /* (non-Javadoc)
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173 * @see org.eclipse.jface.resource.CompositeImageDescriptor#drawCompositeImage(int, int)
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174 */
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175 protected override void drawCompositeImage(int width, int height) {
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176 if (overlays.length > IDecoration.UNDERLAY) {
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177 ImageDescriptor underlay = overlays[IDecoration.UNDERLAY];
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178 if (underlay !is null) {
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179 drawImage(underlay.getImageData(), 0, 0);
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180 }
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181 }
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182 if (overlays.length > IDecoration.REPLACE && overlays[IDecoration.REPLACE] !is null) {
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183 drawImage(overlays[IDecoration.REPLACE].getImageData(), 0, 0);
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184 } else {
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185 drawImage(base.getImageData(), 0, 0);
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186 }
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187 drawOverlays(overlays);
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188 }
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189
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190 /* (non-Javadoc)
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191 * @see org.eclipse.jface.resource.CompositeImageDescriptor#getSize()
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192 */
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193 protected override Point getSize() {
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194 return size;
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195 }
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196
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197 /* (non-Javadoc)
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198 * @see org.eclipse.jface.resource.CompositeImageDescriptor#getTransparentPixel()
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199 */
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200 protected override int getTransparentPixel() {
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201 return base.getImageData().transparentPixel;
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202 }
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203
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204 }