fontdata.java

源码为Eclipse开源开发平台桌面开发工具SWT的源代码,

/*******************************************************************************
 * 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.*;
import org.eclipse.swt.internal.win32.*;
import org.eclipse.swt.*;

/**
 * Instances of this class describe operating system fonts.
 * <p>
 * For platform-independent behaviour, use the get and set methods
 * corresponding to the following properties:
 * <dl>
 * <dt>height</dt><dd>the height of the font in points</dd>
 * <dt>name</dt><dd>the face name of the font, which may include the foundry</dd>
 * <dt>style</dt><dd>A bitwise combination of NORMAL, ITALIC and BOLD</dd>
 * </dl>
 * If extra, platform-dependent functionality is required:
 * <ul>
 * <li>On <em>Windows</em>, the data member of the <code>FontData</code>
 * corresponds to a Windows <code>LOGFONT</code> structure whose fields
 * may be retrieved and modified.</li>
 * <li>On <em>X</em>, the fields of the <code>FontData</code> correspond
 * to the entries in the font's XLFD name and may be retrieved and modified.
 * </ul>
 * Application code does <em>not</em> need to explicitly release the
 * resources managed by each instance when those instances are no longer
 * required, and thus no <code>dispose()</code> method is provided.
 *
 * @see Font
 */

public final class FontData {
	
	/**
	 * A Win32 LOGFONT struct
	 * (Warning: This field is platform dependent)
	 */
	public LOGFONT data;
	
	/**
	 * The height of the font data in points
	 * (Warning: This field is platform dependent)
	 */
	public int height;
	
	/**
	 * The locales of the font
	 * (Warning: These fields are platform dependent)
	 */
	String lang, country, variant;
	
/**	 
 * Constructs a new un-initialized font data.
 */
public FontData() {
	data = OS.IsUnicode ? (LOGFONT)new LOGFONTW() : new LOGFONTA();
	// We set the charset field so that
	// wildcard searching will work properly
	// out of the box
	data.lfCharSet = (byte)OS.DEFAULT_CHARSET;
	height = 12;
}

/**
 * Constructs a new font data given the Windows <code>LOGFONT</code>
 * that it should represent.
 * 
 * @param data the <code>LOGFONT</code> for the result
 */
FontData(LOGFONT data, int height) {
	this.data = data;
	this.height = height;
}

/**
 * Constructs a new FontData given a string representation
 * in the form generated by the <code>FontData.toString</code>
 * method.
 * <p>
 * Note that the representation varies between platforms,
 * and a FontData can only be created from a string that was 
 * generated on the same platform.
 * </p>
 *
 * @param string the string representation of a <code>FontData</code> (must not be null)
 *
 * @exception IllegalArgumentException <ul>
 *    <li>ERROR_NULL_ARGUMENT - if the argument is null</li>
 *    <li>ERROR_INVALID_ARGUMENT - if the argument does not represent a valid description</li>
 * </ul>
 *
 * @see #toString
 */
public FontData(String string) {
	if (string == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
	int start = 0;
	int end = string.indexOf('|');
	if (end == -1) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
	String version1 = string.substring(start, end);
	try {
		if (Integer.parseInt(version1) != 1) SWT.error(SWT.ERROR_INVALID_ARGUMENT); 
	} catch (NumberFormatException e) {
		SWT.error(SWT.ERROR_INVALID_ARGUMENT);
	}
	
	start = end + 1;
	end = string.indexOf('|', start);
	if (end == -1) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
	String name = string.substring(start, end);
	
	start = end + 1;
	end = string.indexOf('|', start);
	if (end == -1) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
	int height = 0;
	try {
		height = Integer.parseInt(string.substring(start, end));
	} catch (NumberFormatException e) {
		SWT.error(SWT.ERROR_INVALID_ARGUMENT);
	}
	
	start = end + 1;
	end = string.indexOf('|', start);
	if (end == -1) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
	int style = 0;
	try {
		style = Integer.parseInt(string.substring(start, end));
	} catch (NumberFormatException e) {
		SWT.error(SWT.ERROR_INVALID_ARGUMENT);
	}

	start = end + 1;
	end = string.indexOf('|', start);
	data = OS.IsUnicode ? (LOGFONT)new LOGFONTW() : new LOGFONTA();
	data.lfCharSet = (byte)OS.DEFAULT_CHARSET;
	setName(name);
	setHeight(height);
	setStyle(style);
	if (end == -1) return;
	String platform = string.substring(start, end);

	start = end + 1;
	end = string.indexOf('|', start);
	if (end == -1) return;
	String version2 = string.substring(start, end);

	if (platform.equals("WINDOWS") && version2.equals("1")) {
		LOGFONT newData = OS.IsUnicode ? (LOGFONT)new LOGFONTW() : new LOGFONTA();
		try {
			start = end + 1;
			end = string.indexOf('|', start);
			if (end == -1) return;
			newData.lfHeight = Integer.parseInt(string.substring(start, end));
			start = end + 1;
			end = string.indexOf('|', start);
			if (end == -1) return;
			newData.lfWidth = Integer.parseInt(string.substring(start, end));
			start = end + 1;
			end = string.indexOf('|', start);
			if (end == -1) return;
			newData.lfEscapement = Integer.parseInt(string.substring(start, end));
			start = end + 1;
			end = string.indexOf('|', start);
			if (end == -1) return;
			newData.lfOrientation = Integer.parseInt(string.substring(start, end));
			start = end + 1;
			end = string.indexOf('|', start);
			if (end == -1) return;
			newData.lfWeight = Integer.parseInt(string.substring(start, end));
			start = end + 1;
			end = string.indexOf('|', start);
			if (end == -1) return;
			newData.lfItalic = Byte.parseByte(string.substring(start, end));
			start = end + 1;
			end = string.indexOf('|', start);
			if (end == -1) return;
			newData.lfUnderline = Byte.parseByte(string.substring(start, end));
			start = end + 1;
			end = string.indexOf('|', start);
			if (end == -1) return;
			newData.lfStrikeOut = Byte.parseByte(string.substring(start, end));
			start = end + 1;
			end = string.indexOf('|', start);
			if (end == -1) return;
			newData.lfCharSet = Byte.parseByte(string.substring(start, end));
			start = end + 1;
			end = string.indexOf('|', start);
			if (end == -1) return;
			newData.lfOutPrecision = Byte.parseByte(string.substring(start, end));
			start = end + 1;
			end = string.indexOf('|', start);
			if (end == -1) return;
			newData.lfClipPrecision = Byte.parseByte(string.substring(start, end));
			start = end + 1;
			end = string.indexOf('|', start);
			if (end == -1) return;
			newData.lfQuality = Byte.parseByte(string.substring(start, end));
			start = end + 1;
			end = string.indexOf('|', start);
			if (end == -1) return;
			newData.lfPitchAndFamily = Byte.parseByte(string.substring(start, end));
			start = end + 1;
		} catch (NumberFormatException e) {
			setName(name);
			setHeight(height);
			setStyle(style);
			return;
		}
		TCHAR buffer = new TCHAR(0, string.substring(start), false);
		int length = Math.min(OS.LF_FACESIZE - 1, buffer.length());
		if (OS.IsUnicode) {
			char[] lfFaceName = ((LOGFONTW)newData).lfFaceName;
			System.arraycopy(buffer.chars, 0, lfFaceName, 0, length);
		} else {
			byte[] lfFaceName = ((LOGFONTA)newData).lfFaceName;
			System.arraycopy(buffer.bytes, 0, lfFaceName, 0, length);
		}
		data = newData;
	}
}

/**	 
 * Constructs a new font data given a font name,
 * the height of the desired font in points, 
 * and a font style.
 *
 * @param name the name of the font (must not be null)
 * @param height the font height in points
 * @param style a bit or combination of NORMAL, BOLD, ITALIC
 *
 * @exception IllegalArgumentException <ul>
 *    <li>ERROR_NULL_ARGUMENT - when the font name is null</li>
 *    <li>ERROR_INVALID_ARGUMENT - if the height is negative</li>
 * </ul>
 */
public FontData(String name, int height, int style) {
	if (name == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
	data = OS.IsUnicode ? (LOGFONT)new LOGFONTW() : new LOGFONTA();
	setName(name);
	setHeight(height);
	setStyle(style);
	// We set the charset field so that
	// wildcard searching will work properly
	// out of the box
	data.lfCharSet = (byte)OS.DEFAULT_CHARSET;
}

/**
 * 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 FontData)) return false;
	FontData fd = (FontData)object;
	LOGFONT lf = fd.data;
	return data.lfCharSet == lf.lfCharSet &&
		/*
		* This code is intentionally commented.  When creating
		* a FontData, lfHeight is not necessarily set.  Instead
		* we check the height field which is always set.
		*/ 
//		data.lfHeight == lf.lfHeight &&
		height == fd.height &&
		data.lfWidth == lf.lfWidth &&
		data.lfEscapement == lf.lfEscapement &&
		data.lfOrientation == lf.lfOrientation &&
		data.lfWeight == lf.lfWeight &&
		data.lfItalic == lf.lfItalic &&
		data.lfUnderline == lf.lfUnderline &&
		data.lfStrikeOut == lf.lfStrikeOut &&
		data.lfCharSet == lf.lfCharSet &&
		data.lfOutPrecision == lf.lfOutPrecision &&
		data.lfClipPrecision == lf.lfClipPrecision &&
		data.lfQuality == lf.lfQuality &&
		data.lfPitchAndFamily == lf.lfPitchAndFamily &&
		getName().equals(fd.getName());
}

int EnumLocalesProc(int lpLocaleString) {
	
	/* Get the locale ID */
	int length = 8;
	TCHAR buffer = new TCHAR(0, length);
	int byteCount = length * TCHAR.sizeof;
	OS.MoveMemory(buffer, lpLocaleString, byteCount);
	int lcid = Integer.parseInt(buffer.toString(0, buffer.strlen ()), 16);

	/* Check the language */
	int size = OS.GetLocaleInfo(lcid, OS.LOCALE_SISO639LANGNAME, buffer, length);
	if (size <= 0 || !lang.equals(buffer.toString(0, size - 1))) return 1;

	/* Check the country */
	if (country != null) {
		size = OS.GetLocaleInfo(lcid, OS.LOCALE_SISO3166CTRYNAME, buffer, length);
		if (size <= 0 || !country.equals(buffer.toString(0, size - 1))) return 1;
	}

	/* Get the charset */
	size = OS.GetLocaleInfo(lcid, OS.LOCALE_IDEFAULTANSICODEPAGE, buffer, length);
	if (size <= 0) return 1;