/******************************************************************************* * Copyright (c) 2000, 2004 IBM Corporation and others. * All rights reserved. This program and the accompanying materials * are made available under the terms of the Common Public License v1.0 * which accompanies this distribution, and is available at * http://www.eclipse.org/legal/cpl-v10.html *  * Contributors: *     IBM Corporation - initial API and implementation *******************************************************************************/package org.eclipse.swt.graphics;import org.eclipse.swt.internal.win32.*;/** * Instances of this class provide measurement information * about fonts including ascent, descent, height, leading * space between rows, and average character width. * <code>FontMetrics</code> are obtained from <code>GC</code>s * using the <code>getFontMetrics()</code> method. * * @see GC#getFontMetrics */ public final class FontMetrics {		/**	 * On Windows, handle is a Win32 TEXTMETRIC struct	 * On Photon, handle is a Photon FontQueryInfo struct	 * (Warning: This field is platform dependent)	 */	public TEXTMETRIC handle;	/** * Prevents instances from being created outside the package. */FontMetrics() {}/** * Compares the argument to the receiver, and returns true * if they represent the <em>same</em> object using a class * specific comparison. * * @param object the object to compare with this object * @return <code>true</code> if the object is the same as this object and <code>false</code> otherwise * * @see #hashCode */public boolean equals (Object object) {	if (object == this) return true;	if (!(object instanceof FontMetrics)) return false;	TEXTMETRIC metric = ((FontMetrics)object).handle;	return handle.tmHeight == metric.tmHeight &&		handle.tmAscent == metric.tmAscent &&		handle.tmDescent == metric.tmDescent &&		handle.tmInternalLeading == metric.tmInternalLeading &&		handle.tmExternalLeading == metric.tmExternalLeading &&		handle.tmAveCharWidth == metric.tmAveCharWidth &&		handle.tmMaxCharWidth == metric.tmMaxCharWidth &&		handle.tmWeight == metric.tmWeight &&		handle.tmOverhang == metric.tmOverhang &&		handle.tmDigitizedAspectX == metric.tmDigitizedAspectX &&		handle.tmDigitizedAspectY == metric.tmDigitizedAspectY &&//		handle.tmFirstChar == metric.tmFirstChar &&//		handle.tmLastChar == metric.tmLastChar &&//		handle.tmDefaultChar == metric.tmDefaultChar &&//		handle.tmBreakChar == metric.tmBreakChar &&		handle.tmItalic == metric.tmItalic &&		handle.tmUnderlined == metric.tmUnderlined &&		handle.tmStruckOut == metric.tmStruckOut &&		handle.tmPitchAndFamily == metric.tmPitchAndFamily &&		handle.tmCharSet == metric.tmCharSet;}/** * Returns the ascent of the font described by the receiver. A * font's <em>ascent</em> is the distance from the baseline to the  * top of actual characters, not including any of the leading area, * measured in pixels. * * @return the ascent of the font */public int getAscent() {	return handle.tmAscent - handle.tmInternalLeading;}/** * Returns the average character width, measured in pixels, * of the font described by the receiver. * * @return the average character width of the font */public int getAverageCharWidth() {	return handle.tmAveCharWidth;}/** * Returns the descent of the font described by the receiver. A * font's <em>descent</em> is the distance from the baseline to the * bottom of actual characters, not including any of the leading area, * measured in pixels. * * @return the descent of the font */public int getDescent() {	return handle.tmDescent;}/** * Returns the height of the font described by the receiver,  * measured in pixels. A font's <em>height</em> is the sum of * its ascent, descent and leading area. * * @return the height of the font * * @see #getAscent * @see #getDescent * @see #getLeading */public int getHeight() {	return handle.tmHeight;}/** * Returns the leading area of the font described by the * receiver. A font's <em>leading area</em> is the space * above its ascent which may include accents or other marks. * * @return the leading space of the font */public int getLeading() {	return handle.tmInternalLeading;}/** * Returns an integer hash code for the receiver. Any two  * objects which return <code>true</code> when passed to  * <code>equals</code> must return the same value for this * method. * * @return the receiver's hash * * @see #equals */public int hashCode() {	return handle.tmHeight ^ handle.tmAscent ^ handle.tmDescent ^		handle.tmInternalLeading ^ handle.tmExternalLeading ^		handle.tmAveCharWidth ^ handle.tmMaxCharWidth ^ handle.tmWeight ^		handle.tmOverhang ^ handle.tmDigitizedAspectX ^ handle.tmDigitizedAspectY ^//		handle.tmFirstChar ^ handle.tmLastChar ^ handle.tmDefaultChar ^ handle.tmBreakChar ^		handle.tmItalic ^ handle.tmUnderlined ^ handle.tmStruckOut ^		handle.tmPitchAndFamily ^ handle.tmCharSet;}/**	  * Invokes platform specific functionality to allocate a new font metrics. * <p> * <b>IMPORTANT:</b> This method is <em>not</em> part of the public * API for <code>FontMetrics</code>. It is marked public only so that * it can be shared within the packages provided by SWT. It is not * available on all platforms, and should never be called from * application code. * </p> * * @param handle the <code>TEXTMETRIC</code> containing information about a font * @return a new font metrics object containing the specified <code>TEXTMETRIC</code> */public static FontMetrics win32_new(TEXTMETRIC handle) {	FontMetrics fontMetrics = new FontMetrics();	fontMetrics.handle = handle;	return fontMetrics;}}