--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dwtx/jface/resource/FontDescriptor.d	Fri Mar 28 23:32:40 2008 +0100
@@ -0,0 +1,301 @@
+/*******************************************************************************
+ * Copyright (c) 2004, 2006 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
+ * Port to the D programming language:
+ *     Frank Benoit <benoit@tionex.de>
+ *******************************************************************************/
+module dwtx.jface.resource.FontDescriptor;
+
+import dwtx.jface.resource.DeviceResourceDescriptor;
+import dwtx.jface.resource.ArrayFontDescriptor;
+
+import dwt.graphics.Device;
+import dwt.graphics.Font;
+import dwt.graphics.FontData;
+import dwt.widgets.Display;
+
+import dwt.dwthelper.utils;
+
+/**
+ * Lightweight descriptor for a font. Creates the described font on demand.
+ * Subclasses can implement different ways of describing a font. These objects
+ * will be compared, so hashCode(...) and equals(...) must return something
+ * meaningful.
+ *
+ * @since 3.1
+ */
+public abstract class FontDescriptor : DeviceResourceDescriptor {
+
+    /**
+     * Creates a FontDescriptor that describes an existing font. The resulting
+     * descriptor depends on the Font. Disposing the Font while the descriptor
+     * is still in use may throw a graphic disposed exception.
+     *
+     * @since 3.1
+     *
+     * @deprecated use {@link FontDescriptor#createFrom(Font)}
+     *
+     * @param font a font to describe
+     * @param originalDevice must be the same Device that was passed into
+     * the font's constructor when it was first created.
+     * @return a newly created FontDescriptor.
+     */
+    public static FontDescriptor createFrom(Font font, Device originalDevice) {
+        return new ArrayFontDescriptor(font);
+    }
+
+    /**
+     * Creates a FontDescriptor that describes an existing font. The resulting
+     * descriptor depends on the original Font, and disposing the original Font
+     * while the descriptor is still in use may cause DWT to throw a graphic
+     * disposed exception.
+     *
+     * @since 3.1
+     *
+     * @param font font to create
+     * @return a newly created FontDescriptor that describes the given font
+     */
+    public static FontDescriptor createFrom(Font font) {
+        return new ArrayFontDescriptor(font);
+    }
+
+    /**
+     * Creates a new FontDescriptor given the an array of FontData that describes
+     * the font.
+     *
+     * @since 3.1
+     *
+     * @param data an array of FontData that describes the font (will be passed into
+     * the Font's constructor)
+     * @return a FontDescriptor that describes the given font
+     */
+    public static FontDescriptor createFrom(FontData[] data) {
+        return new ArrayFontDescriptor(data);
+    }
+
+    /**
+     * Creates a new FontDescriptor given the associated FontData
+     *
+     * @param data FontData describing the font to create
+     * @return a newly created FontDescriptor
+     */
+    public static FontDescriptor createFrom(FontData data) {
+        return new ArrayFontDescriptor( [data] );
+    }
+
+    /**
+     * Creates a new FontDescriptor given an OS-specific font name, height, and style.
+     *
+     * @see Font#Font(dwt.graphics.Device, java.lang.String, int, int)
+     *
+     * @param name os-specific font name
+     * @param height height (pixels)
+     * @param style a bitwise combination of NORMAL, BOLD, ITALIC
+     * @return a new FontDescriptor
+     */
+    public static FontDescriptor createFrom(String name, int height, int style) {
+        return createFrom(new FontData(name, height, style));
+    }
+
+    /**
+     * Returns the set of FontData associated with this font. Modifying the elements
+     * in the returned array has no effect on the original FontDescriptor.
+     *
+     * @return the set of FontData associated with this font
+     * @since 3.3
+     */
+    public FontData[] getFontData() {
+        Font tempFont = createFont(Display.getCurrent());
+        FontData[] result = tempFont.getFontData();
+        destroyFont(tempFont);
+        return result;
+    }
+
+    /**
+     * Returns an array of FontData containing copies of the FontData
+     * from the original.
+     *
+     * @param original array to copy
+     * @return a deep copy of the original array
+     * @since 3.3
+     */
+    public static FontData[] copy(FontData[] original) {
+        FontData[] result = new FontData[original.length];
+        for (int i = 0; i < original.length; i++) {
+            FontData next = original[i];
+
+            result[i] = copy(next);
+        }
+
+        return result;
+    }
+
+    /**
+     * Returns a copy of the original FontData
+     *
+     * @param next FontData to copy
+     * @return a copy of the given FontData
+     * @since 3.3
+     */
+    public static FontData copy(FontData next) {
+        FontData result = new FontData(next.getName(), next.getHeight(), next.getStyle());
+        result.setLocale(next.getLocale());
+        return result;
+    }
+
+    /**
+     * Returns a FontDescriptor that is equivalent to the reciever, but uses
+     * the given style bits.
+     *
+     * <p>Does not modify the reciever.</p>
+     *
+     * @param style a bitwise combination of DWT.NORMAL, DWT.ITALIC and DWT.BOLD
+     * @return a new FontDescriptor with the given style
+     *
+     * @since 3.3
+     */
+    public final FontDescriptor setStyle(int style) {
+        FontData[] data = getFontData();
+
+        for (int i = 0; i < data.length; i++) {
+            FontData next = data[i];
+
+            next.setStyle(style);
+        }
+
+        // Optimization: avoid holding onto extra instances by returning the reciever if
+        // if it is exactly the same as the result
+        FontDescriptor result = new ArrayFontDescriptor(data);
+        if (result.opEquals(this)) {
+            return this;
+        }
+
+        return result;
+    }
+
+    /**
+     * <p>Returns a FontDescriptor that is equivalent to the reciever, but
+     * has the given style bits, in addition to any styles the reciever already has.</p>
+     *
+     * <p>Does not modify the reciever.</p>
+     *
+     * @param style a bitwise combination of DWT.NORMAL, DWT.ITALIC and DWT.BOLD
+     * @return a new FontDescriptor with the given additional style bits
+     * @since 3.3
+     */
+    public final FontDescriptor withStyle(int style) {
+        FontData[] data = getFontData();
+
+        for (int i = 0; i < data.length; i++) {
+            FontData next = data[i];
+
+            next.setStyle(next.getStyle() | style);
+        }
+
+        // Optimization: avoid allocating extra instances by returning the reciever if
+        // if it is exactly the same as the result
+        FontDescriptor result = new ArrayFontDescriptor(data);
+        if (result.opEquals(this)) {
+            return this;
+        }
+
+        return result;
+    }
+
+    /**
+     * <p>Returns a new FontDescriptor that is equivalent to the reciever, but
+     * has the given height.</p>
+     *
+     * <p>Does not modify the reciever.</p>
+     *
+     * @param height a height, in points
+     * @return a new FontDescriptor with the height, in points
+     * @since 3.3
+     */
+    public final FontDescriptor setHeight(int height) {
+        FontData[] data = getFontData();
+
+        for (int i = 0; i < data.length; i++) {
+            FontData next = data[i];
+
+            next.setHeight(height);
+        }
+
+        // Optimization: avoid holding onto extra instances by returning the reciever if
+        // if it is exactly the same as the result
+        FontDescriptor result = new ArrayFontDescriptor(data);
+        if (result.opEquals(this)) {
+            return this;
+        }
+
+        return result;
+    }
+
+    /**
+     * <p>Returns a FontDescriptor that is equivalent to the reciever, but whose height
+     * is larger by the given number of points.</p>
+     *
+     * <p>Does not modify the reciever.</p>
+     *
+     * @param heightDelta a change in height, in points. Negative values will return smaller
+     * fonts.
+     * @return a FontDescriptor whose height differs from the reciever by the given number
+     * of points.
+     * @since 3.3
+     */
+    public final FontDescriptor increaseHeight(int heightDelta) {
+        if (heightDelta is 0) {
+            return this;
+        }
+        FontData[] data = getFontData();
+
+        for (int i = 0; i < data.length; i++) {
+            FontData next = data[i];
+
+            next.setHeight(next.getHeight() + heightDelta);
+        }
+
+        return new ArrayFontDescriptor(data);
+    }
+
+    /**
+     * Creates the Font described by this descriptor.
+     *
+     * @since 3.1
+     *
+     * @param device device on which to allocate the font
+     * @return a newly allocated Font (never null)
+     * @throws DeviceResourceException if unable to allocate the Font
+     */
+    public abstract Font createFont(Device device);
+
+    /**
+     * Deallocates anything that was allocated by createFont, given a font
+     * that was allocated by an equal FontDescriptor.
+     *
+     * @since 3.1
+     *
+     * @param previouslyCreatedFont previously allocated font
+     */
+    public abstract void destroyFont(Font previouslyCreatedFont);
+
+    /* (non-Javadoc)
+     * @see dwtx.jface.resource.DeviceResourceDescriptor#create(dwt.graphics.Device)
+     */
+    public final Object createResource(Device device) {
+        return createFont(device);
+    }
+
+    /* (non-Javadoc)
+     * @see dwtx.jface.resource.DeviceResourceDescriptor#destroy(java.lang.Object)
+     */
+    public final void destroyResource(Object previouslyCreatedObject) {
+        destroyFont(cast(Font)previouslyCreatedObject);
+    }
+}