--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/org.eclipse.ui.forms/src/org/eclipse/ui/forms/widgets/ImageHyperlink.d	Sat Mar 14 18:23:29 2009 +0100
@@ -0,0 +1,300 @@
+/*******************************************************************************
+ * Copyright (c) 2000, 2007 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
+ *     Chriss Gross (schtoo@schtoo.com) - fix for 61670
+ * Port to the D programming language:
+ *     Frank Benoit <benoit@tionex.de>
+ *******************************************************************************/
+module org.eclipse.ui.forms.widgets.ImageHyperlink;
+
+import org.eclipse.ui.forms.widgets.Hyperlink;
+
+import org.eclipse.swt.SWT;
+import org.eclipse.swt.graphics.GC;
+import org.eclipse.swt.graphics.Image;
+import org.eclipse.swt.graphics.Point;
+import org.eclipse.swt.graphics.Rectangle;
+import org.eclipse.swt.widgets.Composite;
+import org.eclipse.swt.widgets.Event;
+
+import java.lang.all;
+import java.util.Set;
+
+/**
+ * This class extends hyperlink widget by adding the capability to render an
+ * image relative to the text. If no text has been set, only image will be
+ * shown. Images for hover and active states can be set in addition to the
+ * normal state image.
+ * <p>
+ * When image is taller than the text, additional style can be provided to
+ * control vertical alignment (supported values are SWT.TOP, SWT.BOTTOM and
+ * SWT.CENTER).
+ * <p>
+ * The class does not need to be sublassed but it is allowed to do so if some
+ * aspect of the image hyperlink needs to be modified.
+ *
+ * @since 3.0
+ */
+public class ImageHyperlink : Hyperlink {
+    /**
+     * Amount of pixels between the image and the text (default is 5).
+     */
+    public int textSpacing = 5;
+
+    private Image image;
+
+    private Image hoverImage;
+
+    private Image activeImage;
+
+    private int state;
+
+    private static const int HOVER = 1 << 1;
+
+    private static const int ACTIVE = 1 << 2;
+
+    private int verticalAlignment = SWT.CENTER;
+
+    private int horizontalAlignment = SWT.LEFT;
+
+    /**
+     * Creates the image hyperlink instance.
+     *
+     * @param parent
+     *            the control parent
+     * @param style
+     *            the control style (SWT.WRAP, BOTTOM, TOP, MIDDLE, LEFT, RIGHT)
+     */
+    public this(Composite parent, int style) {
+        super(parent, removeAlignment(style));
+        extractAlignment(style);
+    }
+
+    /*
+     * (non-Javadoc)
+     *
+     * @see org.eclipse.ui.forms.widgets.AbstractHyperlink#paintHyperlink(org.eclipse.swt.events.PaintEvent)
+     */
+    protected void paintHyperlink(GC gc) {
+        paintHyperlink(gc, getClientArea());
+    }
+
+    protected void paintHyperlink(GC gc, Rectangle bounds) {
+        Image image = null;
+        if ((state & ACTIVE) !is 0)
+            image = activeImage;
+        else if ((state & HOVER) !is 0)
+            image = hoverImage;
+        if (image is null)
+            image = this.image;
+        Rectangle ibounds = image !is null ? image.getBounds() : new Rectangle(0, 0, 0, 0);
+        Point maxsize = computeMaxImageSize();
+        int spacing = image !is null?textSpacing:0;
+        int textWidth = bounds.width - maxsize.x - spacing
+                - marginWidth - marginWidth;
+        int y = bounds.y+marginHeight + maxsize.y / 2 - ibounds.height / 2;
+
+        if (horizontalAlignment is SWT.LEFT) {
+            int x = bounds.x+marginWidth + maxsize.x / 2 - ibounds.width / 2;
+            int textX = bounds.x + marginWidth + maxsize.x + spacing;
+            if (image !is null)
+                gc.drawImage(image, x, y);
+            if (getText() !is null)
+                drawText(gc, bounds, textX, textWidth);
+        } else if (horizontalAlignment is SWT.RIGHT) {
+            int x = bounds.x+marginWidth;
+            if (getText() !is null) {
+                x += drawText(gc, bounds, x, textWidth);
+            }
+            x += maxsize.x / 2 - ibounds.width / 2 + spacing;
+            if (image !is null)
+                gc.drawImage(image, x, y);
+        }
+    }
+
+    private int drawText(GC gc, Rectangle clientArea, int textX, int textWidth) {
+        Point textSize = computeTextSize(textWidth, SWT.DEFAULT);
+        int slotHeight = clientArea.height - marginHeight - marginHeight;
+        int textY;
+        textWidth = textSize.x;
+        int textHeight = textSize.y;
+        if (verticalAlignment is SWT.BOTTOM) {
+            textY = marginHeight + slotHeight - textHeight;
+        } else if (verticalAlignment is SWT.CENTER) {
+            textY = marginHeight + slotHeight / 2 - textHeight / 2;
+        } else {
+            textY = marginHeight;
+        }
+        paintText(gc, new Rectangle(textX, textY, textWidth, textHeight));
+        return textWidth;
+    }
+
+    /**
+     * Computes the control size by reserving space for images in addition to
+     * text.
+     *
+     * @param wHint
+     *            width hint
+     * @param hHint
+     *            height hint
+     * @param changed
+     *            if <code>true</code>, any cached layout data should be
+     *            computed anew
+     */
+    public Point computeSize(int wHint, int hHint, bool changed) {
+        checkWidget();
+        Point isize = computeMaxImageSize();
+        int spacing = isize.x>0?textSpacing:0;
+        Point textSize = null;
+        if (getText() !is null) {
+            int innerWHint = wHint;
+            if (wHint !is SWT.DEFAULT) {
+                innerWHint = wHint - 2 * marginWidth - isize.x - spacing;
+            }
+            textSize = super.computeSize(innerWHint, hHint, changed);
+        }
+        int width = isize.x;
+        int height = isize.y;
+        if (textSize !is null) {
+            width += spacing;
+            width += textSize.x;
+            height = Math.max(height, textSize.y);
+        }
+        width += 2 * marginWidth;
+        height += 2 * marginHeight;
+        return new Point(width, height);
+    }
+
+    protected void handleEnter(Event e) {
+        state = HOVER;
+        super.handleEnter(e);
+    }
+
+    protected void handleExit(Event e) {
+        state = 0;
+        super.handleExit(e);
+    }
+
+    protected void handleActivate(Event e) {
+        state &= ACTIVE;
+        redraw();
+        super.handleActivate(e);
+        state &= ~ACTIVE;
+        if (!isDisposed())
+            redraw();
+    }
+
+    /**
+     * Returns active image.
+     *
+     * @return active image or <code>null</code> if not set.
+     */
+    public Image getActiveImage() {
+        return activeImage;
+    }
+
+    /**
+     * Sets the image to show when link is activated.
+     *
+     * @param activeImage
+     *
+     */
+    public void setActiveImage(Image activeImage) {
+        this.activeImage = activeImage;
+    }
+
+    /**
+     * Returns the hover image.
+     *
+     * @return hover image or <code>null</code> if not set.
+     */
+    public Image getHoverImage() {
+        return hoverImage;
+    }
+
+    /**
+     * Sets the image to show when link is hover state (on mouse over).
+     *
+     * @param hoverImage
+     */
+    public void setHoverImage(Image hoverImage) {
+        this.hoverImage = hoverImage;
+    }
+
+    /**
+     * Returns the image to show in the normal state.
+     *
+     * @return normal image or <code>null</code> if not set.
+     */
+    public Image getImage() {
+        return image;
+    }
+
+    /**
+     * Sets the image to show when link is in the normal state.
+     *
+     * @param image
+     */
+    public void setImage(Image image) {
+        this.image = image;
+    }
+
+    private Point computeMaxImageSize() {
+        int x = 0;
+        int y = 0;
+        if (image !is null) {
+            x = Math.max(image.getBounds().width, x);
+            y = Math.max(image.getBounds().height, y);
+        }
+        if (hoverImage !is null) {
+            x = Math.max(hoverImage.getBounds().width, x);
+            y = Math.max(hoverImage.getBounds().height, y);
+        }
+        if (activeImage !is null) {
+            x = Math.max(activeImage.getBounds().width, x);
+            y = Math.max(activeImage.getBounds().height, y);
+        }
+        return new Point(x, y);
+    }
+
+    private static int removeAlignment(int style) {
+        int resultStyle = style;
+        if ((style & SWT.CENTER) !is 0) {
+            resultStyle &= (~SWT.CENTER);
+        }
+        if ((style & SWT.TOP) !is 0) {
+            resultStyle &= (~SWT.TOP);
+        }
+        if ((style & SWT.BOTTOM) !is 0) {
+            resultStyle &= (~SWT.BOTTOM);
+        }
+        if ((style & SWT.LEFT) !is 0) {
+            resultStyle &= (~SWT.LEFT);
+        }
+        if ((style & SWT.RIGHT) !is 0) {
+            resultStyle &= (~SWT.RIGHT);
+        }
+        return resultStyle;
+    }
+
+    private void extractAlignment(int style) {
+        if ((style & SWT.CENTER) !is 0) {
+            verticalAlignment = SWT.CENTER;
+        } else if ((style & SWT.TOP) !is 0) {
+            verticalAlignment = SWT.TOP;
+        } else if ((style & SWT.BOTTOM) !is 0) {
+            verticalAlignment = SWT.BOTTOM;
+        }
+        if ((style & SWT.LEFT) !is 0) {
+            horizontalAlignment = SWT.LEFT;
+        } else if ((style & SWT.RIGHT) !is 0) {
+            horizontalAlignment = SWT.RIGHT;
+        }
+    }
+}