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annotate org.eclipse.jface.text/src/org/eclipse/jface/internal/text/InformationControlReplacer.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) 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.internal.text.InformationControlReplacer;
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15 import org.eclipse.jface.internal.text.NonDeletingPositionUpdater; // packageimport
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16 import org.eclipse.jface.internal.text.InternalAccessor; // packageimport
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17 import org.eclipse.jface.internal.text.StickyHoverManager; // packageimport
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18 import org.eclipse.jface.internal.text.TableOwnerDrawSupport; // packageimport
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19 import org.eclipse.jface.internal.text.DelayedInputChangeListener; // packageimport
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22 import java.lang.all;
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23 import java.util.Set;
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27 import org.eclipse.swt.graphics.Point;
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28 import org.eclipse.swt.graphics.Rectangle;
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29 import org.eclipse.swt.widgets.Shell;
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30 import org.eclipse.jface.text.AbstractInformationControlManager;
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31 import org.eclipse.jface.text.AbstractReusableInformationControlCreator;
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32 import org.eclipse.jface.text.DefaultInformationControl;
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33 import org.eclipse.jface.text.IInformationControl;
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34 import org.eclipse.jface.text.IInformationControlCreator;
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35 import org.eclipse.jface.text.IInformationControlExtension2;
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36 import org.eclipse.jface.text.IInformationControlExtension3;
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37 import org.eclipse.jface.util.Geometry;
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39
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40 /**
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41 * An information control replacer can replace an
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42 * {@link AbstractInformationControlManager}'s control.
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43 *
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44 * @see AbstractInformationControlManager#setInformationControlReplacer(InformationControlReplacer)
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45 * @since 3.4
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46 */
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47 public class InformationControlReplacer : AbstractInformationControlManager {
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48 alias AbstractInformationControlManager.showInformationControl showInformationControl;
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49 /**
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50 * Minimal width in pixels.
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51 */
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52 private static const int MIN_WIDTH= 80;
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53 /**
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54 * Minimal height in pixels.
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55 */
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56 private static const int MIN_HEIGHT= 50;
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57
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58 /**
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59 * Default control creator.
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60 */
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61 protected static class DefaultInformationControlCreator : AbstractReusableInformationControlCreator {
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62 public IInformationControl doCreateInformationControl(Shell shell) {
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63 return new DefaultInformationControl(shell, true);
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64 }
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65 }
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66
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67 private bool fIsReplacing;
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68 private Object fReplacableInformation;
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69 private bool fDelayedInformationSet;
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70 private Rectangle fReplaceableArea;
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71 private Rectangle fContentBounds;
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72
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73
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74 /**
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75 * Creates a new information control replacer.
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76 *
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77 * @param creator the default information control creator
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78 */
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79 public this(IInformationControlCreator creator) {
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80 super(creator);
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81 takesFocusWhenVisible(false);
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82 }
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83
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84 /**
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85 * Replace the information control.
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86 *
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87 * @param informationPresenterControlCreator the information presenter control creator
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88 * @param contentBounds the bounds of the content area of the information control
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89 * @param information the information to show
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90 * @param subjectArea the subject area
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91 * @param takeFocus <code>true</code> iff the replacing information control should take focus
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92 */
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93 public void replaceInformationControl(IInformationControlCreator informationPresenterControlCreator, Rectangle contentBounds, Object information, Rectangle subjectArea, bool takeFocus) {
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94
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95 try {
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96 fIsReplacing= true;
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97 if (! fDelayedInformationSet)
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98 fReplacableInformation= information;
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99 else
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100 takeFocus= true; // delayed input has been set, so the original info control must have been focused
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101 fContentBounds= contentBounds;
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102 fReplaceableArea= subjectArea;
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103
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104 setCustomInformationControlCreator(informationPresenterControlCreator);
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105
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106 takesFocusWhenVisible(takeFocus);
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107
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108 showInformation();
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109 } finally {
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110 fIsReplacing= false;
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111 fReplacableInformation= null;
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112 fDelayedInformationSet= false;
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113 fReplaceableArea= null;
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114 setCustomInformationControlCreator(null);
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115 }
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116 }
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117
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118 /*
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119 * @see org.eclipse.jface.text.AbstractInformationControlManager#computeInformation()
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120 */
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121 protected void computeInformation() {
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122 if (fIsReplacing && fReplacableInformation !is null) {
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123 setInformation(fReplacableInformation, fReplaceableArea);
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124 return;
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125 }
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126
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127 if (DEBUG)
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128 System.out_.println("InformationControlReplacer: no active replaceable"); //$NON-NLS-1$
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129 }
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130
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131 /**
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132 * Opens the information control with the given information and the specified
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133 * subject area. It also activates the information control closer.
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134 *
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135 * @param subjectArea the information area
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136 * @param information the information
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137 */
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138 public void showInformationControl(Rectangle subjectArea, Object information) {
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139 IInformationControl informationControl= getInformationControl();
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140
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141 Rectangle controlBounds= fContentBounds;
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142 if ( cast(IInformationControlExtension3)informationControl ) {
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143 IInformationControlExtension3 iControl3= cast(IInformationControlExtension3) informationControl;
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144 Rectangle trim= iControl3.computeTrim();
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145 controlBounds= Geometry.add(controlBounds, trim);
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146
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147 /*
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148 * Ensure minimal size. Interacting with a tiny information control
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149 * (resizing, selecting text) would be a pain.
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150 */
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151 controlBounds.width= Math.max(controlBounds.width, MIN_WIDTH);
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152 controlBounds.height= Math.max(controlBounds.height, MIN_HEIGHT);
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153
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154 getInternalAccessor().cropToClosestMonitor(controlBounds);
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155 }
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156
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157 Point location= Geometry.getLocation(controlBounds);
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158 Point size= Geometry.getSize(controlBounds);
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159
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160 // Caveat: some IInformationControls fail unless setSizeConstraints(..) is called with concrete values
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161 informationControl.setSizeConstraints(size.x, size.y);
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162
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163 if ( cast(IInformationControlExtension2)informationControl )
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164 (cast(IInformationControlExtension2) informationControl).setInput(information);
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165 else
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166 informationControl.setInformation(information.toString());
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167
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168 informationControl.setLocation(location);
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169 informationControl.setSize(size.x, size.y);
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170
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171 showInformationControl(subjectArea);
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172 }
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173
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174 /*
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175 * @see org.eclipse.jface.text.AbstractInformationControlManager#hideInformationControl()
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176 */
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177 public void hideInformationControl() {
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178 super.hideInformationControl();
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179 }
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180
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181 /**
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182 * @param input the delayed input, or <code>null</code> to request cancellation
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183 */
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184 public void setDelayedInput(Object input) {
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185 fReplacableInformation= input;
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186 if (! isReplacing()) {
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187 fDelayedInformationSet= true;
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188 } else if (cast(IInformationControlExtension2)getCurrentInformationControl2() ) {
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189 (cast(IInformationControlExtension2) getCurrentInformationControl2()).setInput(input);
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190 } else if (getCurrentInformationControl2() !is null) {
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191 getCurrentInformationControl2().setInformation(input.toString());
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192 }
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193 }
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194
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195 /**
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196 * Tells whether the replacer is currently replacing another information control.
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197 *
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198 * @return <code>true</code> while code from {@link #replaceInformationControl(IInformationControlCreator, Rectangle, Object, Rectangle, bool)} is run
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199 */
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200 public bool isReplacing() {
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201 return fIsReplacing;
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202 }
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203
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204 /**
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205 * @return the current information control, or <code>null</code> if none available
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206 */
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207 public IInformationControl getCurrentInformationControl2() {
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208 return getInternalAccessor().getCurrentInformationControl();
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209 }
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210
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211 /**
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212 * The number of pixels to blow up the keep-up zone.
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213 *
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214 * @return the margin in pixels
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215 */
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216 public int getKeepUpMargin() {
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217 return 15;
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218 }
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219 }