--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dwtx/jface/text/AbstractInformationControlManager.d	Sat Aug 23 19:10:48 2008 +0200
@@ -0,0 +1,1437 @@
+/*******************************************************************************
+ * Copyright (c) 2000, 2008 IBM Corporation and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *     IBM Corporation - initial API and implementation
+ *     Sean Montgomery, sean_montgomery@comcast.net - https://bugs.eclipse.org/bugs/show_bug.cgi?id=45095
+ * Port to the D programming language:
+ *     Frank Benoit <benoit@tionex.de>
+ *******************************************************************************/
+
+module dwtx.jface.text.AbstractInformationControlManager;
+
+import dwt.dwthelper.utils;
+
+
+
+
+
+import dwt.DWT;
+import dwt.events.DisposeEvent;
+import dwt.events.DisposeListener;
+import dwt.graphics.GC;
+import dwt.graphics.Point;
+import dwt.graphics.Rectangle;
+import dwt.widgets.Control;
+import dwt.widgets.Display;
+import dwt.widgets.Monitor;
+import dwtx.core.runtime.Assert;
+import dwtx.core.runtime.Platform;
+import dwtx.jface.dialogs.IDialogSettings;
+import dwtx.jface.internal.text.InformationControlReplacer;
+import dwtx.jface.internal.text.InternalAccessor;
+import dwtx.jface.text.ITextViewerExtension8.EnrichMode;
+import dwtx.jface.util.Geometry;
+
+
+/**
+ * Manages the life cycle, visibility, layout, and contents of an
+ * {@link dwtx.jface.text.IInformationControl}. This manager can be
+ * installed on and removed from a control, referred to as the subject control,
+ * i.e. the one from which the subject of the information to be shown is
+ * retrieved. Also a manager can be enabled or disabled. An installed and
+ * enabled manager can be forced to show information in its information control
+ * using <code>showInformation</code>. An information control manager uses an
+ * <code>IInformationControlCloser</code> to define the behavior when a
+ * presented information control must be closed. The disposal of the subject and
+ * the information control are internally handled by the information control
+ * manager and are not the responsibility of the information control closer.
+ *
+ * @see dwtx.jface.text.IInformationControl
+ * @since 2.0
+ */
+abstract public class AbstractInformationControlManager {
+
+    /**
+     * An internal class that gives access to internal methods.
+     * 
+     * @since 3.4
+     */
+    class MyInternalAccessor : InternalAccessor {
+        public IInformationControl getCurrentInformationControl() {
+            return AbstractInformationControlManager.this.getCurrentInformationControl();
+        }
+        
+        public void setInformationControlReplacer(InformationControlReplacer replacer) {
+            AbstractInformationControlManager.this.setInformationControlReplacer(replacer);
+        }
+        
+        public InformationControlReplacer getInformationControlReplacer() {
+            return AbstractInformationControlManager.this.getInformationControlReplacer();
+        }
+        
+        public bool canReplace(IInformationControl control) {
+            return AbstractInformationControlManager.this.canReplace(control);
+        }
+        
+        public bool isReplaceInProgress() {
+            return AbstractInformationControlManager.this.isReplaceInProgress();
+        }
+        
+        public void replaceInformationControl(bool takeFocus) {
+            AbstractInformationControlManager.this.replaceInformationControl(takeFocus);
+        }
+
+        public void cropToClosestMonitor(Rectangle bounds) {
+            AbstractInformationControlManager.this.cropToClosestMonitor(bounds);
+        }
+        
+        public void setHoverEnrichMode(EnrichMode mode) {
+            throw new UnsupportedOperationException("only implemented in AbstractHoverInformationControlManager"); //$NON-NLS-1$
+        }
+        
+        public bool getAllowMouseExit() {
+            throw new UnsupportedOperationException("only implemented in AnnotationBarHoverManager"); //$NON-NLS-1$
+        }
+    }
+
+    /**
+     * Interface of an information control closer. An information control closer
+     * monitors its information control and its subject control and closes the
+     * information control if necessary.
+     * <p>
+     * Clients must implement this interface in order to equip an information
+     * control manager accordingly.
+     */
+    public interface IInformationControlCloser {
+
+        /**
+         * Sets the closer's subject control. This is the control that parents
+         * the information control and from which the subject of the information
+         * to be shown is retrieved. <p>
+         * Must be called before <code>start</code>. May again be called
+         * between <code>start</code> and <code>stop</code>.
+         *
+         * @param subject the subject control
+         */
+        public void setSubjectControl(Control subject);
+
+        /**
+         * Sets the closer's information control, the one to close if necessary. <p>
+         * Must be called before <code>start</code>. May again be called
+         * between <code>start</code> and <code>stop</code>.
+         *
+         * @param control the information control
+         */
+        public void setInformationControl(IInformationControl control);
+
+        /**
+         * Tells this closer to start monitoring the subject and the information
+         * control. The presented information is considered valid for the given
+         * area of the subject control's display.
+         *
+         * @param subjectArea the area for which the presented information is valid
+         */
+        public void start(Rectangle subjectArea);
+
+        /**
+         * Tells this closer to stop monitoring the subject and the information control.
+         */
+        public void stop();
+    }
+
+
+
+    /**
+     * Constitutes entities to enumerate anchors for the layout of the information control.
+     */
+    public static final class Anchor {
+        private final int fFlag;
+        private Anchor(int flag) {
+            fFlag= flag;
+        }
+        /**
+         * Returns the DWT direction flag. One of {@link DWT#BOTTOM}, {@link DWT#TOP},
+         * {@link DWT#LEFT}, {@link DWT#RIGHT}, {@link DWT#CENTER},
+         * 
+         * @return the DWT direction flag
+         * @since 3.3
+         */
+        int getSWTFlag() {
+            return fFlag;
+        }
+        
+        public String toString() {
+            switch (fFlag) {
+                case DWT.BOTTOM: return "BOTTOM"; //$NON-NLS-1$
+                case DWT.TOP: return "TOP"; //$NON-NLS-1$
+                case DWT.LEFT: return "LEFT"; //$NON-NLS-1$
+                case DWT.RIGHT: return "RIGHT"; //$NON-NLS-1$
+                case DWT.CENTER: return "CENTER"; //$NON-NLS-1$
+                default: return Integer.toHexString(fFlag);
+            }
+        }
+    }
+
+    /** Internal anchor list. */
+    private final static Anchor[] ANCHORS= { new Anchor(DWT.TOP), new Anchor(DWT.BOTTOM), new Anchor(DWT.LEFT), new Anchor(DWT.RIGHT) };
+
+    /** Anchor representing the top of the information area */
+    public final static Anchor ANCHOR_TOP=  ANCHORS[0];
+    /** Anchor representing the bottom of the information area */
+    public final static Anchor ANCHOR_BOTTOM=  ANCHORS[1];
+    /** Anchor representing the left side of the information area */
+    public final static Anchor ANCHOR_LEFT=  ANCHORS[2];
+    /** Anchor representing the right side of the information area */
+    public final static Anchor ANCHOR_RIGHT= ANCHORS[3];
+    /**
+     * Anchor representing the middle of the subject control
+     * @since 2.1
+     */
+    public final static Anchor ANCHOR_GLOBAL= new Anchor(DWT.CENTER);
+
+    /**
+     * Dialog store constant for the location's x-coordinate.
+     * @since 3.0
+     */
+    public static final String STORE_LOCATION_X= "location.x"; //$NON-NLS-1$
+    /**
+     * Dialog store constant for the location's y-coordinate.
+     * @since 3.0
+     */
+    public static final String STORE_LOCATION_Y= "location.y"; //$NON-NLS-1$
+    /**
+     * Dialog store constant for the size's width.
+     * @since 3.0
+     */
+    public static final String STORE_SIZE_WIDTH= "size.width"; //$NON-NLS-1$
+    /**
+     * Dialog store constant for the size's height.
+     * @since 3.0
+     */
+    public static final String STORE_SIZE_HEIGHT= "size.height"; //$NON-NLS-1$
+    
+    /**
+     * Tells whether this class and its subclasses are in debug mode.
+     * <p>
+     * Subclasses may use this.
+     * </p>
+     * @since 3.4
+     */
+    protected static final bool DEBUG= "true".equalsIgnoreCase(Platform.getDebugOption("dwtx.jface.text/debug/AbstractInformationControlManager"));  //$NON-NLS-1$//$NON-NLS-2$
+
+
+    /** The subject control of the information control */
+    private Control  fSubjectControl;
+
+    /** The display area for which the information to be presented is valid */
+    private Rectangle fSubjectArea;
+
+    /** The information to be presented */
+    private Object fInformation;
+
+    /** Indicates whether the information control takes focus when visible */
+    private bool fTakesFocusWhenVisible= false;
+
+    /**
+     * The information control.
+     * 
+     * <p>This field should not be referenced by subclasses. It is <code>protected</code> for API
+     * compatibility reasons.
+     */
+    protected IInformationControl fInformationControl;
+
+    /**
+     * The information control creator.
+     * 
+     * <p>This field should not be referenced by subclasses. It is <code>protected</code> for API
+     * compatibility reasons.
+     */
+    protected IInformationControlCreator fInformationControlCreator;
+
+    /**
+     * The information control closer.
+     * 
+     * <p>This field should not be referenced by subclasses. It is <code>protected</code> for API
+     * compatibility reasons.
+     */
+    protected IInformationControlCloser fInformationControlCloser;
+
+    /**
+     * Indicates that the information control has been disposed.
+     * 
+     * <p>This field should not be referenced by subclasses. It is <code>protected</code> for API
+     * compatibility reasons.
+     */
+    protected bool fDisposed= false;
+
+    /**
+     * The information control replacer to be used when this information control
+     * needs to be replaced with another information control.
+     * 
+     * @since 3.4
+     */
+    private InformationControlReplacer fInformationControlReplacer;
+
+    /** Indicates the enable state of this manager */
+    private bool fEnabled= false;
+
+    /** Cached, computed size constraints of the information control in points */
+    private Point fSizeConstraints;
+
+    /** The vertical margin when laying out the information control */
+    private int fMarginY= 5;
+
+    /** The horizontal margin when laying out the information control */
+    private int fMarginX= 5;
+
+    /** The width constraint of the information control in characters */
+    private int fWidthConstraint= 60;
+
+    /** The height constraint of the information control  in characters */
+    private int fHeightConstraint= 6;
+
+    /** Indicates whether the size constraints should be enforced as minimal control size */
+    private bool fEnforceAsMinimalSize= false;
+
+    /** Indicates whether the size constraints should be enforced as maximal control size */
+    private bool fEnforceAsMaximalSize= false;
+
+    /** The anchor for laying out the information control in relation to the subject control */
+    private Anchor fAnchor= ANCHOR_BOTTOM;
+
+    /**
+     * The anchor sequence used to layout the information control if the original anchor
+     * can not be used because the information control would not fit in the display client area.
+     * <p>
+     * The fallback anchor for a given anchor is the one that comes directly after the given anchor or
+     * is the first one in the sequence if the given anchor is the last one in the sequence.
+     * <p>
+     * </p>
+     * Note: This sequence is ignored if the original anchor is not contained in this sequence.
+     * </p>
+     *
+     * @see #fAnchor
+     */
+    private Anchor[] fFallbackAnchors= ANCHORS;
+
+    /**
+     * The custom information control creator.
+     * @since 3.0
+     */
+    private volatile IInformationControlCreator fCustomInformationControlCreator;
+
+    /**
+     * Tells whether a custom information control is in use.
+     * @since 3.0
+     */
+    private bool fIsCustomInformationControl= false;
+
+    /**
+     * The dialog settings for the control's bounds.
+     * @since 3.0
+     */
+    private IDialogSettings fDialogSettings;
+
+    /**
+     * Tells whether the control's location should be read
+     * from the dialog settings and whether the last
+     * valid control's size is stored back into the  settings.
+     *
+     * @since 3.0
+     */
+    private bool fIsRestoringLocation;
+
+    /**
+     * Tells whether the control's size should be read
+     * from the dialog settings and whether the last
+     * valid control's size is stored back into the  settings.
+     *
+     * @since 3.0
+     */
+    private bool fIsRestoringSize;
+
+    /**
+     * The dispose listener on the subject control.
+     * 
+     * @since 3.1
+     */
+    private DisposeListener fSubjectControlDisposeListener;
+
+
+    /**
+     * Creates a new information control manager using the given information control creator.
+     * By default the following configuration is given:
+     * <ul>
+     * <li> enabled is false
+     * <li> horizontal margin is 5 points
+     * <li> vertical margin is 5 points
+     * <li> width constraint is 60 characters
+     * <li> height constraint is 6 characters
+     * <li> enforce constraints as minimal size is false
+     * <li> enforce constraints as maximal size is false
+     * <li> layout anchor is ANCHOR_BOTTOM
+     * <li> fall back anchors is { ANCHOR_TOP, ANCHOR_BOTTOM, ANCHOR_LEFT, ANCHOR_RIGHT, ANCHOR_GLOBAL }
+     * <li> takes focus when visible is false
+     * </ul>
+     *
+     * @param creator the information control creator
+     */
+    protected AbstractInformationControlManager(IInformationControlCreator creator) {
+        Assert.isNotNull(creator);
+        fInformationControlCreator= creator;
+    }
+
+    /**
+     * Computes the information to be displayed and the area in which the computed
+     * information is valid. Implementation of this method must finish their computation
+     * by setting the computation results using <code>setInformation</code>.
+     */
+    abstract protected void computeInformation();
+
+    /**
+     * Sets the parameters of the information to be displayed. These are the information itself and
+     * the area for which the given information is valid. This so called subject area is a graphical
+     * region of the information control's subject control. This method calls <code>presentInformation()</code>
+     * to trigger the presentation of the computed information.
+     *
+     * @param information the information, or <code>null</code> if none is available
+     * @param subjectArea the subject area, or <code>null</code> if none is available
+     */
+    protected final void setInformation(String information, Rectangle subjectArea) {
+        setInformation((Object)information, subjectArea);
+    }
+
+    /**
+     * Sets the parameters of the information to be displayed. These are the information itself and
+     * the area for which the given information is valid. This so called subject area is a graphical
+     * region of the information control's subject control. This method calls <code>presentInformation()</code>
+     * to trigger the presentation of the computed information.
+     *
+     * @param information the information, or <code>null</code> if none is available
+     * @param subjectArea the subject area, or <code>null</code> if none is available
+     * @since  2.1
+     */
+    protected final void setInformation(Object information, Rectangle subjectArea) {
+        fInformation= information;
+        fSubjectArea= subjectArea;
+        presentInformation();
+    }
+
+    /**
+     * Sets the information control closer for this manager.
+     *
+     * @param closer the information control closer for this manager
+     */
+    protected void setCloser(IInformationControlCloser closer) {
+        fInformationControlCloser= closer;
+    }
+    
+    /**
+     * Sets the information control replacer for this manager and disposes the
+     * old one if set.
+     * 
+     * @param replacer the information control replacer for this manager, or
+     *            <code>null</code> if no information control replacing should
+     *            take place
+     * @since 3.4
+     */
+    void setInformationControlReplacer(InformationControlReplacer replacer) {
+        if (fInformationControlReplacer !is null)
+            fInformationControlReplacer.dispose();
+        fInformationControlReplacer= replacer;
+    }
+
+    /**
+     * Returns the current information control replacer or <code>null</code> if none has been installed.
+     * 
+     * @return the current information control replacer or <code>null</code> if none has been installed
+     * @since 3.4
+     */
+    InformationControlReplacer getInformationControlReplacer() {
+        return fInformationControlReplacer;
+    }
+
+    /**
+     * Returns whether an information control replacer has been installed.
+     * 
+     * @return whether an information control replacer has been installed
+     * @since 3.4
+     */
+    bool hasInformationControlReplacer() {
+        return fInformationControlReplacer !is null;
+    }
+    
+    /**
+     * Tests whether the given information control is replaceable.
+     * 
+     * @param iControl information control or <code>null</code> if none
+     * @return <code>true</code> if information control is replaceable, <code>false</code> otherwise
+     * @since 3.4
+     */
+    bool canReplace(IInformationControl iControl) {
+        return iControl instanceof IInformationControlExtension3
+                && iControl instanceof IInformationControlExtension5
+                && ((IInformationControlExtension5) iControl).getInformationPresenterControlCreator() !is null;
+    }
+    
+    /**
+     * Returns the current information control, or <code>null</code> if none.
+     * 
+     * @return the current information control, or <code>null</code> if none
+     * @since 3.4
+     */
+    IInformationControl getCurrentInformationControl() {
+        return fInformationControl;
+    }
+
+    /**
+     * Tells whether this manager's information control is currently being replaced.
+     * 
+     * @return <code>true</code> if a replace is in progress
+     * @since 3.4
+     */
+    bool isReplaceInProgress() {
+        return fInformationControlReplacer !is null && fInformationControlReplacer.isReplacing();
+    }
+
+    /**
+     * Sets the horizontal and vertical margin to be used when laying out the
+     * information control relative to the subject control.
+     * 
+     * @param xMargin the x-margin
+     * @param yMargin the y-Margin
+     */
+    public void setMargins(int xMargin, int yMargin) {
+        fMarginX= xMargin;
+        fMarginY= yMargin;
+    }
+
+    /**
+     * Sets the width- and height constraints of the information control.
+     *
+     * @param widthInChar the width constraint in number of characters
+     * @param heightInChar the height constrain in number of characters
+     * @param enforceAsMinimalSize indicates whether the constraints describe the minimal allowed size of the control
+     * @param enforceAsMaximalSize indicates whether the constraints describe the maximal allowed size of the control
+     */
+    public void setSizeConstraints(int widthInChar, int heightInChar, bool enforceAsMinimalSize, bool enforceAsMaximalSize) {
+        fSizeConstraints= null;
+        fWidthConstraint= widthInChar;
+        fHeightConstraint= heightInChar;
+        fEnforceAsMinimalSize= enforceAsMinimalSize;
+        fEnforceAsMaximalSize= enforceAsMaximalSize;
+
+    }
+
+    /**
+     * Tells this information control manager to open the information
+     * control with the values contained in the given dialog settings
+     * and to store the control's last valid size in the given dialog
+     * settings.
+     * <p>
+     * Note: This API is only valid if the information control implements
+     * {@link IInformationControlExtension3}. Not following this restriction
+     * will later result in an {@link UnsupportedOperationException}.
+     * </p>
+     * <p>
+     * The constants used to store the values are:
+     * <ul>
+     *  <li>{@link AbstractInformationControlManager#STORE_LOCATION_X}</li>
+     *  <li>{@link AbstractInformationControlManager#STORE_LOCATION_Y}</li>
+     *  <li>{@link AbstractInformationControlManager#STORE_SIZE_WIDTH}</li>
+     *  <li>{@link AbstractInformationControlManager#STORE_SIZE_HEIGHT}</li>
+     * </ul>
+     * </p>
+     *
+     * @param dialogSettings
+     * @param restoreLocation <code>true</code> iff the location is must be (re-)stored
+     * @param restoreSize <code>true</code>iff the size is (re-)stored
+     * @since 3.0
+     */
+    public void setRestoreInformationControlBounds(IDialogSettings dialogSettings, bool restoreLocation, bool restoreSize) {
+        Assert.isTrue(dialogSettings !is null && (restoreLocation || restoreSize));
+        fDialogSettings= dialogSettings;
+        fIsRestoringLocation= restoreLocation;
+        fIsRestoringSize= restoreSize;
+    }
+
+    /**
+     * Sets the anchor used for laying out the information control relative to the
+     * subject control. E.g, using <code>ANCHOR_TOP</code> indicates that the
+     * information control is position above the area for which the information to
+     * be displayed is valid.
+     *
+     * @param anchor the layout anchor
+     */
+    public void setAnchor(Anchor anchor) {
+        fAnchor= anchor;
+    }
+
+    /**
+     * Sets the anchors fallback sequence used to layout the information control if the original
+     * anchor can not be used because the information control would not fit in the display client
+     * area.
+     * <p>
+     * The fallback anchor for a given anchor is the one that comes directly after the given anchor or
+     * is the first one in the sequence if the given anchor is the last one in the sequence.
+     * <p>
+     * </p>
+     * Note: This sequence is ignored if the original anchor is not contained in this list.
+     * </p>
+     *
+     * @param fallbackAnchors the array with the anchor fallback sequence
+     * @see #setAnchor(AbstractInformationControlManager.Anchor)
+     */
+    public void setFallbackAnchors(Anchor[] fallbackAnchors) {
+        if (fallbackAnchors !is null) {
+            fFallbackAnchors= new Anchor[fallbackAnchors.length];
+            System.arraycopy(fallbackAnchors, 0, fFallbackAnchors, 0, fallbackAnchors.length);
+        } else
+            fFallbackAnchors= null;
+    }
+
+    /**
+     * Sets the temporary custom control creator, overriding this manager's default information control creator.
+     *
+     * @param informationControlCreator the creator, possibly <code>null</code>
+     * @since 3.0
+     */
+    protected void setCustomInformationControlCreator(IInformationControlCreator informationControlCreator)  {
+        if (informationControlCreator !is null && fCustomInformationControlCreator  instanceof IInformationControlCreatorExtension) {
+            IInformationControlCreatorExtension extension= (IInformationControlCreatorExtension) fCustomInformationControlCreator;
+            if (extension.canReplace(informationControlCreator))
+                return;
+        }
+        fCustomInformationControlCreator= informationControlCreator;
+    }
+
+    /**
+     * Tells the manager whether it should set the focus to the information control when made visible.
+     *
+     * @param takesFocus <code>true</code> if information control should take focus when made visible
+     */
+    public void takesFocusWhenVisible(bool takesFocus) {
+        fTakesFocusWhenVisible= takesFocus;
+    }
+
+    /**
+     * Handles the disposal of the subject control. By default, the information control
+     * is disposed by calling <code>disposeInformationControl</code>. Subclasses may extend
+     * this method.
+     */
+    protected void handleSubjectControlDisposed() {
+        disposeInformationControl();
+    }
+
+    /**
+     * Installs this manager on the given control. The control is now taking the role of
+     * the subject control. This implementation sets the control also as the information
+     * control closer's subject control and automatically enables this manager.
+     *
+     * @param subjectControl the subject control
+     */
+    public void install(Control subjectControl) {
+        if (fSubjectControl !is null && !fSubjectControl.isDisposed() && fSubjectControlDisposeListener !is null)
+            fSubjectControl.removeDisposeListener(fSubjectControlDisposeListener);
+
+        fSubjectControl= subjectControl;
+
+        if (fSubjectControl !is null)
+            fSubjectControl.addDisposeListener(getSubjectControlDisposeListener());
+
+        if (fInformationControlCloser !is null)
+            fInformationControlCloser.setSubjectControl(subjectControl);
+
+        setEnabled(true);
+        fDisposed= false;
+    }
+    
+    /**
+     * Returns the dispose listener which gets added
+     * to the subject control.
+     * 
+     * @return the dispose listener
+     * @since 3.1
+     */
+    private DisposeListener getSubjectControlDisposeListener() {
+        if (fSubjectControlDisposeListener is null) {
+            fSubjectControlDisposeListener= new DisposeListener() {
+                public void widgetDisposed(DisposeEvent e) {
+                    handleSubjectControlDisposed();
+                }
+            };
+        }
+        return fSubjectControlDisposeListener;
+    }
+
+    /**
+     * Returns the subject control of this manager/information control.
+     *
+     * @return the subject control
+     */
+    protected Control getSubjectControl() {
+        return fSubjectControl;
+    }
+
+    /**
+     * Returns the actual subject area.
+     *
+     * @return the actual subject area
+     */
+    protected Rectangle getSubjectArea() {
+        return fSubjectArea;
+    }
+
+    /**
+     * Sets the enable state of this manager.
+     *
+     * @param enabled the enable state
+     * @deprecated visibility will be changed to protected
+     */
+    public void setEnabled(bool enabled) {
+        fEnabled= enabled;
+    }
+
+    /**
+     * Returns whether this manager is enabled or not.
+     *
+     * @return <code>true</code> if this manager is enabled otherwise <code>false</code>
+     */
+    protected bool isEnabled() {
+        return fEnabled;
+    }
+
+    /**
+     * Computes the size constraints of the information control in points based on the
+     * default font of the given subject control as well as the size constraints in character
+     * width.
+     *
+     * @param subjectControl the subject control
+     * @param informationControl the information control whose size constraints are computed
+     * @return the computed size constraints in points
+     */
+    protected Point computeSizeConstraints(Control subjectControl, IInformationControl informationControl) {
+
+        if (fSizeConstraints is null) {
+            if (informationControl instanceof IInformationControlExtension5) {
+                IInformationControlExtension5 iControl5= (IInformationControlExtension5) informationControl;
+                fSizeConstraints= iControl5.computeSizeConstraints(fWidthConstraint, fHeightConstraint);
+                if (fSizeConstraints !is null)
+                    return Geometry.copy(fSizeConstraints);
+            }
+            if (subjectControl is null)
+                return null;
+
+            GC gc= new GC(subjectControl);
+            gc.setFont(subjectControl.getFont());
+            int width= gc.getFontMetrics().getAverageCharWidth();
+            int height = gc.getFontMetrics().getHeight();
+            gc.dispose();
+
+            fSizeConstraints= new Point (fWidthConstraint * width, fHeightConstraint * height);
+        }
+
+        return new Point(fSizeConstraints.x, fSizeConstraints.y);
+    }
+
+    /**
+     * Computes the size constraints of the information control in points.
+     *
+     * @param subjectControl the subject control
+     * @param subjectArea the subject area
+     * @param informationControl the information control whose size constraints are computed
+     * @return the computed size constraints in points
+     * @since 3.0
+     */
+    protected Point computeSizeConstraints(Control subjectControl, Rectangle subjectArea, IInformationControl informationControl) {
+        return computeSizeConstraints(subjectControl, informationControl);
+    }
+
+    /**
+     * Handles the disposal of the information control. By default, the information
+     * control closer is stopped.
+     */
+    protected void handleInformationControlDisposed() {
+
+        storeInformationControlBounds();
+
+        if (fInformationControl instanceof IInformationControlExtension5)
+            fSizeConstraints= null;
+        fInformationControl= null;
+        if (fInformationControlCloser !is null) {
+            fInformationControlCloser.setInformationControl(null); //XXX: null is against the spec
+            fInformationControlCloser.stop();
+        }
+    }
+
+    /**
+     * Returns the information control. If the information control has not been created yet,
+     * it is automatically created.
+     *
+     * @return the information control
+     */
+    protected IInformationControl getInformationControl() {
+
+        if (fDisposed)
+            return fInformationControl;
+
+        IInformationControlCreator creator= null;
+
+        if (fCustomInformationControlCreator is null) {
+            creator= fInformationControlCreator;
+            if (fIsCustomInformationControl && fInformationControl !is null) {
+                if (fInformationControl instanceof IInformationControlExtension5)
+                    fSizeConstraints= null;
+                fInformationControl.dispose();
+                fInformationControl= null;
+            }
+            fIsCustomInformationControl= false;
+
+        } else  {
+
+            creator= fCustomInformationControlCreator;
+            if (creator instanceof IInformationControlCreatorExtension)  {
+                IInformationControlCreatorExtension extension= (IInformationControlCreatorExtension) creator;
+                if (fInformationControl !is null && extension.canReuse(fInformationControl))
+                    return fInformationControl;
+            }
+            if (fInformationControl !is null)  {
+                if (fInformationControl instanceof IInformationControlExtension5)
+                    fSizeConstraints= null;
+                fInformationControl.dispose();
+                fInformationControl= null;
+            }
+            fIsCustomInformationControl= true;
+        }
+
+        if (fInformationControl is null) {
+            fInformationControl= creator.createInformationControl(fSubjectControl.getShell());
+            fInformationControl.addDisposeListener(new DisposeListener() {
+                public void widgetDisposed(DisposeEvent e) {
+                    handleInformationControlDisposed();
+                }
+            });
+
+            if (fInformationControlCloser !is null)
+                fInformationControlCloser.setInformationControl(fInformationControl);
+        }
+
+        return fInformationControl;
+    }
+
+    /**
+     * Computes the display location of the information control. The location is computed
+     * considering the given subject area, the anchor at the subject area, and the
+     * size of the information control. This method does not care about whether the information
+     * control would be completely visible when placed at the result location.
+     *
+     * @param subjectArea the subject area
+     * @param controlSize the size of the information control
+     * @param anchor the anchor at the subject area
+     * @return the display location of the information control
+     */
+    protected Point computeLocation(Rectangle subjectArea, Point controlSize, Anchor anchor) {
+        int xShift= 0;
+        int yShift= 0;
+
+        switch (anchor.getSWTFlag()) {
+            case DWT.CENTER:
+                Point subjectControlSize= fSubjectControl.getSize();
+                Point location= new Point(subjectControlSize.x / 2, subjectControlSize.y / 2);
+                location.x -= (controlSize.x / 2);
+                location.y -= (controlSize.y / 2);
+                return fSubjectControl.toDisplay(location);
+            case DWT.BOTTOM:
+                yShift= subjectArea.height + fMarginY;
+                break;
+            case DWT.RIGHT:
+                xShift= fMarginX + subjectArea.width;
+                break;
+            case DWT.TOP:
+                yShift= -controlSize.y - fMarginY;
+                break;
+            case DWT.LEFT:
+                xShift= -controlSize.x - fMarginX;
+                break;
+        }
+
+        bool isRTL= fSubjectControl !is null && (fSubjectControl.getStyle() & DWT.RIGHT_TO_LEFT) !is 0;
+        if (isRTL)
+            xShift += controlSize.x;
+
+        return  fSubjectControl.toDisplay(new Point(subjectArea.x + xShift, subjectArea.y + yShift));
+    }
+    
+    /**
+     * Computes the area available for an information control given an anchor and the subject area
+     * within <code>bounds</code>.
+     * 
+     * @param subjectArea the subject area
+     * @param bounds the bounds
+     * @param anchor the anchor at the subject area
+     * @return the area available at the given anchor relative to the subject area, confined to the
+     *         monitor's client area
+     * @since 3.3
+     */
+    protected Rectangle computeAvailableArea(Rectangle subjectArea, Rectangle bounds, Anchor anchor) {
+        Rectangle area;
+        switch (anchor.getSWTFlag()) {
+            case DWT.CENTER:
+                area= bounds;
+                break;
+            case DWT.BOTTOM:
+                int y= subjectArea.y + subjectArea.height + fMarginY;
+                area= new Rectangle(bounds.x, y, bounds.width, bounds.y + bounds.height - y);
+                break;
+            case DWT.RIGHT:
+                int x= subjectArea.x + subjectArea.width + fMarginX;
+                area= new Rectangle(x, bounds.y, bounds.x + bounds.width - x, bounds.height);
+                break;
+            case DWT.TOP:
+                area= new Rectangle(bounds.x, bounds.y, bounds.width, subjectArea.y - bounds.y - fMarginY);
+                break;
+            case DWT.LEFT:
+                area= new Rectangle(bounds.x, bounds.y, subjectArea.x - bounds.x - fMarginX, bounds.height);
+                break;
+            default:
+                Assert.isLegal(false);
+                return null;
+        }
+
+        // Don't return negative areas if the subjectArea overlaps with the monitor bounds.
+        area.intersect(bounds);
+        return area;
+    }
+    
+    /**
+     * Checks whether a control of the given size at the given location would be completely visible
+     * in the given display area when laid out by using the given anchor. If not, this method tries
+     * to shift the control orthogonal to the direction given by the anchor to make it visible. If possible
+     * it updates the location.<p>
+     * This method returns <code>true</code> if the potentially updated position results in a
+     * completely visible control, or <code>false</code> otherwise.
+     *
+     *
+     * @param location the location of the control
+     * @param size the size of the control
+     * @param displayArea the display area in which the control should be visible
+     * @param anchor anchor for lying out the control
+     * @return <code>true</code>if the updated location is useful
+     */
+    protected bool updateLocation(Point location, Point size, Rectangle displayArea, Anchor anchor) {
+
+        int displayLowerRightX= displayArea.x + displayArea.width;
+        int displayLowerRightY= displayArea.y + displayArea.height;
+        int lowerRightX= location.x + size.x;
+        int lowerRightY= location.y + size.y;
+
+        if (ANCHOR_BOTTOM is anchor || ANCHOR_TOP is anchor) {
+
+            if (ANCHOR_BOTTOM is anchor) {
+                if (lowerRightY > displayLowerRightY)
+                    return false;
+            } else {
+                if (location.y < displayArea.y)
+                    return false;
+            }
+
+            if (lowerRightX > displayLowerRightX)
+                location.x= location.x - (lowerRightX - displayLowerRightX);
+
+            return (location.x >= displayArea.x && location.y >= displayArea.y);
+
+        } else if (ANCHOR_RIGHT is anchor || ANCHOR_LEFT is anchor) {
+
+            if (ANCHOR_RIGHT is anchor) {
+                if (lowerRightX > displayLowerRightX)
+                    return false;
+            } else {
+                if (location.x < displayArea.x)
+                    return false;
+            }
+
+            if (lowerRightY > displayLowerRightY)
+                location.y= location.y - (lowerRightY - displayLowerRightY);
+
+            return (location.x >= displayArea.x && location.y >= displayArea.y);
+
+        } else if (ANCHOR_GLOBAL is anchor) {
+
+            if (lowerRightX > displayLowerRightX)
+                location.x= location.x - (lowerRightX - displayLowerRightX);
+
+            if (lowerRightY > displayLowerRightY)
+                location.y= location.y - (lowerRightY - displayLowerRightY);
+
+            return (location.x >= displayArea.x && location.y >= displayArea.y);
+        }
+
+        return false;
+    }
+
+    /**
+     * Returns the next fallback anchor as specified by this manager's
+     * fallback anchor sequence.
+     * <p>
+     * The fallback anchor for the given anchor is the one that comes directly after
+     * the given anchor or is the first one in the sequence if the given anchor is the
+     * last one in the sequence.
+     * </p>
+     * <p>
+     * Note: It is the callers responsibility to prevent an endless loop i.e. to test
+     * whether a given anchor has already been used once.
+     * then
+     * </p>
+     *
+     * @param anchor the current anchor
+     * @return the next fallback anchor or <code>null</code> if no fallback anchor is available
+     */
+    protected Anchor getNextFallbackAnchor(Anchor anchor) {
+
+        if (anchor is null || fFallbackAnchors is null)
+            return null;
+
+        for (int i= 0; i < fFallbackAnchors.length; i++) {
+            if (fFallbackAnchors[i] is anchor)
+                return fFallbackAnchors[i + 1 is fFallbackAnchors.length ? 0 : i + 1];
+        }
+
+        return null;
+    }
+
+    /**
+     * Computes the location of the information control depending on the
+     * subject area and the size of the information control. This method attempts
+     * to find a location at which the information control lies completely in the display's
+     * client area while honoring the manager's default anchor. If this isn't possible using the
+     * default anchor, the fallback anchors are tried out.
+     *
+     * @param subjectArea the information area
+     * @param controlSize the size of the information control
+     * @return the computed location of the information control
+     */
+    protected Point computeInformationControlLocation(Rectangle subjectArea, Point controlSize) {
+        Rectangle subjectAreaDisplayRelative= Geometry.toDisplay(fSubjectControl, subjectArea);
+
+        Point upperLeft;
+        Anchor testAnchor= fAnchor;
+        Rectangle bestBounds= null;
+        int bestArea= Integer.MIN_VALUE;
+        Anchor bestAnchor= null;
+        do {
+
+            upperLeft= computeLocation(subjectArea, controlSize, testAnchor);
+            Monitor monitor= getClosestMonitor(subjectAreaDisplayRelative, testAnchor);
+            if (updateLocation(upperLeft, controlSize, monitor.getClientArea(), testAnchor))
+                return upperLeft;
+            
+            // compute available area for this anchor and update if better than best
+            Rectangle available= computeAvailableArea(subjectAreaDisplayRelative, monitor.getClientArea(), testAnchor);
+            Rectangle proposed= new Rectangle(upperLeft.x, upperLeft.y, controlSize.x, controlSize.y);
+            available.intersect(proposed);
+            int area= available.width * available.height;
+            if (area > bestArea) {
+                bestArea= area;
+                bestBounds= available;
+                bestAnchor= testAnchor;
+            }
+            
+            testAnchor= getNextFallbackAnchor(testAnchor);
+
+        } while (testAnchor !is fAnchor && testAnchor !is null);
+        
+        // no anchor is perfect - select the one with larges area and set the size to not overlap with the subjectArea
+        if (bestAnchor !is ANCHOR_GLOBAL)
+            Geometry.set(controlSize, Geometry.getSize(bestBounds));
+        return Geometry.getLocation(bestBounds);
+    }
+    
+    /**
+     * Gets the closest monitor given an anchor and the subject area.
+     * 
+     * @param area the subject area
+     * @param anchor the anchor
+     * @return the monitor closest to the edge of <code>area</code> defined by
+     *         <code>anchor</code>
+     * @since 3.3
+     */
+    private Monitor getClosestMonitor(Rectangle area, Anchor anchor) {
+        Point center;
+        if (ANCHOR_GLOBAL is anchor)
+            center= Geometry.centerPoint(area);
+        else
+            center= Geometry.centerPoint(Geometry.getExtrudedEdge(area, 0, anchor.getSWTFlag()));
+        return getClosestMonitor(fSubjectControl.getDisplay(), Geometry.createRectangle(center, new Point(0, 0)));
+    }
+
+    /**
+     * Copied from dwtx.jface.window.Window. Returns the monitor whose client area contains
+     * the given point. If no monitor contains the point, returns the monitor that is closest to the
+     * point. If this is ever made public, it should be moved into a separate utility class.
+     * 
+     * @param display the display to search for monitors
+     * @param rectangle the rectangle to find the closest monitor for (display coordinates)
+     * @return the monitor closest to the given point
+     * @since 3.3
+     */
+    private Monitor getClosestMonitor(Display display, Rectangle rectangle) {
+        int closest = Integer.MAX_VALUE;
+
+        Point toFind= Geometry.centerPoint(rectangle);
+        Monitor[] monitors = display.getMonitors();
+        Monitor result = monitors[0];
+
+        for (int idx = 0; idx < monitors.length; idx++) {
+            Monitor current = monitors[idx];
+
+            Rectangle clientArea = current.getClientArea();
+
+            if (clientArea.contains(toFind)) {
+                return current;
+            }
+
+            int distance = Geometry.distanceSquared(Geometry.centerPoint(clientArea), toFind);
+            if (distance < closest) {
+                closest = distance;
+                result = current;
+            }
+        }
+
+        return result;
+    }
+
+    /**
+     * Computes information to be displayed as well as the subject area
+     * and initiates that this information is presented in the information control.
+     * This happens only if this controller is enabled.
+     */
+    public void showInformation() {
+        if (fEnabled)
+            doShowInformation();
+    }
+
+    /**
+     * Computes information to be displayed as well as the subject area
+     * and initiates that this information is presented in the information control.
+     */
+    protected void doShowInformation() {
+        fSubjectArea= null;
+        fInformation= null;
+        computeInformation();
+    }
+
+    /**
+     * Presents the information in the information control or hides the information
+     * control if no information should be presented. The information has previously
+     * been set using <code>setInformation</code>.
+     */
+    protected void presentInformation() {
+        bool hasContents= false;
+        if (fInformation instanceof String)
+            hasContents= ((String)fInformation).trim().length() > 0;
+        else
+            hasContents= (fInformation !is null);
+
+        if (fSubjectArea !is null && hasContents)
+            internalShowInformationControl(fSubjectArea, fInformation);
+        else
+            hideInformationControl();
+    }
+
+    /**
+     * Opens the information control with the given information and the specified
+     * subject area. It also activates the information control closer.
+     *
+     * @param subjectArea the information area
+     * @param information the information
+     */
+    private void internalShowInformationControl(Rectangle subjectArea, Object information) {
+        if (this instanceof InformationControlReplacer) {
+            ((InformationControlReplacer) this).showInformationControl(subjectArea, information);
+            return;
+        }
+        
+        IInformationControl informationControl= getInformationControl();
+        if (informationControl !is null) {
+
+            Point sizeConstraints= computeSizeConstraints(fSubjectControl, fSubjectArea, informationControl);
+            if (informationControl instanceof IInformationControlExtension3) {
+                IInformationControlExtension3 iControl3= (IInformationControlExtension3) informationControl;
+                Rectangle trim= iControl3.computeTrim();
+                sizeConstraints.x += trim.width;
+                sizeConstraints.y += trim.height;
+            }
+            informationControl.setSizeConstraints(sizeConstraints.x, sizeConstraints.y);
+
+            if (informationControl instanceof IInformationControlExtension2)
+                ((IInformationControlExtension2)informationControl).setInput(information);
+            else
+                informationControl.setInformation(information.toString());
+
+            if (informationControl instanceof IInformationControlExtension) {
+                IInformationControlExtension extension= (IInformationControlExtension)informationControl;
+                if (!extension.hasContents())
+                    return;
+            }
+
+            Point size= null;
+            Point location= null;
+            Rectangle bounds= restoreInformationControlBounds();
+
+            if (bounds !is null) {
+                if (bounds.x > -1 && bounds.y > -1)
+                    location= Geometry.getLocation(bounds);
+
+                if (bounds.width > -1 && bounds.height > -1)
+                    size= Geometry.getSize(bounds);
+            }
+
+            if (size is null)
+                size= informationControl.computeSizeHint();
+
+            if (fEnforceAsMinimalSize)
+                size= Geometry.max(size, sizeConstraints);
+            if (fEnforceAsMaximalSize)
+                size= Geometry.min(size, sizeConstraints);
+
+            if (location is null)
+                location= computeInformationControlLocation(subjectArea, size);
+
+            Rectangle controlBounds= Geometry.createRectangle(location, size);
+            cropToClosestMonitor(controlBounds);
+            location= Geometry.getLocation(controlBounds);
+            size= Geometry.getSize(controlBounds);
+            informationControl.setLocation(location);
+            informationControl.setSize(size.x, size.y);
+            
+            showInformationControl(subjectArea);
+        }
+    }
+
+    /**
+     * Crops the given bounds such that they lie completely on the closest monitor.
+     *  
+     * @param bounds shell bounds to crop
+     * @since 3.4
+     */
+    void cropToClosestMonitor(Rectangle bounds) {
+        Rectangle monitorBounds= getClosestMonitor(fSubjectControl.getDisplay(), bounds).getClientArea();
+        bounds.intersect(monitorBounds);
+    }
+
+    /**
+     * Hides the information control and stops the information control closer.
+     */
+    protected void hideInformationControl() {
+        if (fInformationControl !is null) {
+            storeInformationControlBounds();
+            fInformationControl.setVisible(false);
+            if (fInformationControlCloser !is null)
+                fInformationControlCloser.stop();
+        }
+    }
+
+    /**
+     * Shows the information control and starts the information control closer.
+     * This method may not be called by clients.
+     *
+     * @param subjectArea the information area
+     */
+    protected void showInformationControl(Rectangle subjectArea) {
+        fInformationControl.setVisible(true);
+
+        if (fTakesFocusWhenVisible)
+            fInformationControl.setFocus();
+
+        if (fInformationControlCloser !is null)
+            fInformationControlCloser.start(subjectArea);
+    }
+
+    /**
+     * Replaces this manager's information control as defined by
+     * the information control replacer.
+     * <strong>Must only be called when {@link #fInformationControl} instanceof {@link IInformationControlExtension3}!</strong>
+     * 
+     * @param takeFocus <code>true</code> iff the replacing information control should take focus
+     *
+     * @since 3.4
+     */
+    void replaceInformationControl(bool takeFocus) {
+        if (fInformationControlReplacer !is null && canReplace(fInformationControl)) {
+            IInformationControlExtension3 iControl3= (IInformationControlExtension3) fInformationControl;
+            Rectangle b= iControl3.getBounds();
+            Rectangle t= iControl3.computeTrim();
+            Rectangle contentBounds= new Rectangle(b.x - t.x, b.y - t.y, b.width - t.width, b.height - t.height);
+            IInformationControlCreator informationPresenterControlCreator= ((IInformationControlExtension5) fInformationControl).getInformationPresenterControlCreator();
+            fInformationControlReplacer.replaceInformationControl(informationPresenterControlCreator, contentBounds, fInformation, fSubjectArea, takeFocus);
+        }
+        hideInformationControl();
+    }
+    
+    /**
+     * Disposes this manager's information control.
+     */
+    public void disposeInformationControl() {
+        if (fInformationControl !is null) {
+            fInformationControl.dispose();
+            handleInformationControlDisposed();
+        }
+    }
+
+    /**
+     * Disposes this manager and if necessary all dependent parts such as
+     * the information control. For symmetry it first disables this manager.
+     */
+    public void dispose() {
+        if (!fDisposed) {
+
+            fDisposed= true;
+
+            setEnabled(false);
+            disposeInformationControl();
+            
+            if (fInformationControlReplacer !is null) {
+                fInformationControlReplacer.dispose();
+                fInformationControlReplacer= null;
+            }
+            
+            if (fSubjectControl !is null && !fSubjectControl.isDisposed() && fSubjectControlDisposeListener !is null)
+                fSubjectControl.removeDisposeListener(fSubjectControlDisposeListener);
+            fSubjectControl= null;
+            fSubjectControlDisposeListener= null;
+
+            fIsCustomInformationControl= false;
+            fCustomInformationControlCreator= null;
+            fInformationControlCreator= null;
+            fInformationControlCloser= null;
+        }
+    }
+
+    // ------ control's size handling dialog settings ------
+
+    /**
+     * Stores the information control's bounds.
+     *
+     * @since 3.0
+     */
+    protected void storeInformationControlBounds() {
+        if (fDialogSettings is null || fInformationControl is null || !(fIsRestoringLocation || fIsRestoringSize))
+            return;
+
+        if (!(fInformationControl instanceof IInformationControlExtension3))
+            throw new UnsupportedOperationException();
+
+        bool controlRestoresSize= ((IInformationControlExtension3)fInformationControl).restoresSize();
+        bool controlRestoresLocation= ((IInformationControlExtension3)fInformationControl).restoresLocation();
+
+        Rectangle bounds= ((IInformationControlExtension3)fInformationControl).getBounds();
+        if (bounds is null)
+            return;
+
+        if (fIsRestoringSize && controlRestoresSize) {
+            fDialogSettings.put(STORE_SIZE_WIDTH, bounds.width);
+            fDialogSettings.put(STORE_SIZE_HEIGHT, bounds.height);
+        }
+        if (fIsRestoringLocation && controlRestoresLocation) {
+            fDialogSettings.put(STORE_LOCATION_X, bounds.x);
+            fDialogSettings.put(STORE_LOCATION_Y, bounds.y);
+        }
+    }
+    /**
+     * Restores the information control's bounds.
+     *
+     * @return the stored bounds
+     * @since 3.0
+     */
+    protected Rectangle restoreInformationControlBounds() {
+        if (fDialogSettings is null || !(fIsRestoringLocation || fIsRestoringSize))
+            return null;
+
+        if (!(fInformationControl instanceof IInformationControlExtension3))
+            throw new UnsupportedOperationException();
+
+        bool controlRestoresSize= ((IInformationControlExtension3)fInformationControl).restoresSize();
+        bool controlRestoresLocation= ((IInformationControlExtension3)fInformationControl).restoresLocation();
+
+        Rectangle bounds= new Rectangle(-1, -1, -1, -1);
+
+        if (fIsRestoringSize && controlRestoresSize) {
+            try {
+                bounds.width= fDialogSettings.getInt(STORE_SIZE_WIDTH);
+                bounds.height= fDialogSettings.getInt(STORE_SIZE_HEIGHT);
+            } catch (NumberFormatException ex) {
+                bounds.width= -1;
+                bounds.height= -1;
+            }
+        }
+
+        if (fIsRestoringLocation && controlRestoresLocation) {
+            try {
+                bounds.x= fDialogSettings.getInt(STORE_LOCATION_X);
+                bounds.y= fDialogSettings.getInt(STORE_LOCATION_Y);
+            } catch (NumberFormatException ex) {
+                bounds.x= -1;
+                bounds.y= -1;
+            }
+        }
+
+        // sanity check
+        if (bounds.x is -1 && bounds.y is -1 && bounds.width is -1 && bounds.height is -1)
+            return null;
+
+        Rectangle maxBounds= null;
+        if (fSubjectControl !is null && !fSubjectControl.isDisposed())
+            maxBounds= fSubjectControl.getDisplay().getBounds();
+        else {
+            // fallback
+            Display display= Display.getCurrent();
+            if (display is null)
+                display= Display.getDefault();
+            if (display !is null && !display.isDisposed())
+                maxBounds= display.getBounds();
+        }
+
+
+        if (bounds.width > -1 && bounds.height > -1) {
+            if (maxBounds !is null) {
+                bounds.width= Math.min(bounds.width, maxBounds.width);
+                bounds.height= Math.min(bounds.height, maxBounds.height);
+            }
+
+            // Enforce an absolute minimal size
+            bounds.width= Math.max(bounds.width, 30);
+            bounds.height= Math.max(bounds.height, 30);
+        }
+
+        if (bounds.x > -1 && bounds.y > -1 && maxBounds !is null) {
+            bounds.x= Math.max(bounds.x, maxBounds.x);
+            bounds.y= Math.max(bounds.y, maxBounds.y);
+
+            if (bounds .width > -1 && bounds.height > -1) {
+                bounds.x= Math.min(bounds.x, maxBounds.width - bounds.width);
+                bounds.y= Math.min(bounds.y, maxBounds.height - bounds.height);
+            }
+        }
+
+        return bounds;
+    }
+
+    /**
+     * Returns an adapter that gives access to internal methods.
+     * <p>
+     * <strong>Note:</strong> This method is not intended to be referenced or overridden by clients.</p>
+     * 
+     * @return the replaceable information control accessor
+     * @since 3.4
+     * @noreference This method is not intended to be referenced by clients.
+     * @nooverride This method is not intended to be re-implemented or extended by clients.
+     */
+    public InternalAccessor getInternalAccessor() {
+        return new MyInternalAccessor();
+    }
+}