fontdata.java

源码为Eclipse开源开发平台桌面开发工具SWT的源代码,

	int cp = Integer.parseInt(buffer.toString(0, size - 1));
	int [] lpCs = new int[8];
	OS.TranslateCharsetInfo(cp, lpCs, OS.TCI_SRCCODEPAGE);
	data.lfCharSet = (byte)lpCs[0];

	return 0;
}

/**
 * Returns the height of the receiver in points.
 *
 * @return the height of this FontData
 *
 * @see #setHeight
 */
public int getHeight() {
	return height;
}

/**
 * Returns the locale of the receiver.
 * <p>
 * The locale determines which platform character set this
 * font is going to use. Widgets and graphics operations that
 * use this font will convert UNICODE strings to the platform
 * character set of the specified locale.
 * </p>
 * <p>
 * On platforms where there are multiple character sets for a
 * given language/country locale, the variant portion of the
 * locale will determine the character set.
 * </p>
 * 
 * @return the <code>String</code> representing a Locale object
 * @since 3.0
 */
public String getLocale () {
	StringBuffer buffer = new StringBuffer ();
	char sep = '_';
	if (lang != null) {
		buffer.append (lang);
		buffer.append (sep);
	}
	if (country != null) {
		buffer.append (country);
		buffer.append (sep);
	}
	if (variant != null) {
		buffer.append (variant);
	}
	
	String result = buffer.toString ();
	int length = result.length ();
	if (length > 0) {
		if (result.charAt (length - 1) == sep) {
			result = result.substring (0, length - 1);
		}
	} 
	return result;
}

/**
 * Returns the name of the receiver.
 * On platforms that support font foundries, the return value will
 * be the foundry followed by a dash ("-") followed by the face name.
 *
 * @return the name of this <code>FontData</code>
 *
 * @see #setName
 */
public String getName() {
	char[] chars;
	if (OS.IsUnicode) {
		chars = ((LOGFONTW)data).lfFaceName;
	} else {
		chars = new char[OS.LF_FACESIZE];
		byte[] bytes = ((LOGFONTA)data).lfFaceName;
		OS.MultiByteToWideChar (OS.CP_ACP, OS.MB_PRECOMPOSED, bytes, bytes.length, chars, chars.length);
	}
	int index = 0;
	while (index < chars.length) {
		if (chars [index] == 0) break;
		index++;
	}
	return new String (chars, 0, index);
}

/**
 * Returns the style of the receiver which is a bitwise OR of 
 * one or more of the <code>SWT</code> constants NORMAL, BOLD
 * and ITALIC.
 *
 * @return the style of this <code>FontData</code>
 * 
 * @see #setStyle
 */
public int getStyle() {
	int style = SWT.NORMAL;
	if (data.lfWeight == 700) style |= SWT.BOLD;
	if (data.lfItalic != 0) style |= SWT.ITALIC;
	return style;
}

/**
 * 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 data.lfCharSet ^ height ^ data.lfWidth ^ data.lfEscapement ^
		data.lfOrientation ^ data.lfWeight ^ data.lfItalic ^data.lfUnderline ^
		data.lfStrikeOut ^ data.lfCharSet ^ data.lfOutPrecision ^
		data.lfClipPrecision ^ data.lfQuality ^ data.lfPitchAndFamily ^
		getName().hashCode();
}

/**
 * Sets the height of the receiver. The parameter is
 * specified in terms of points, where a point is one
 * seventy-second of an inch.
 *
 * @param height the height of the <code>FontData</code>
 *
 * @exception IllegalArgumentException <ul>
 *    <li>ERROR_INVALID_ARGUMENT - if the height is negative</li>
 * </ul>
 * 
 * @see #getHeight
 */
public void setHeight(int height) {
	if (height < 0) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
	this.height = height;
}

/**
 * Sets the locale of the receiver.
 * <p>
 * The locale determines which platform character set this
 * font is going to use. Widgets and graphics operations that
 * use this font will convert UNICODE strings to the platform
 * character set of the specified locale.
 * </p>
 * <p>
 * On platforms where there are multiple character sets for a
 * given language/country locale, the variant portion of the
 * locale will determine the character set.
 * </p>
 * 
 * @param locale the <code>String</code> representing a Locale object
 * @see java.util.Locale#toString
 */
public void setLocale(String locale) {	
	lang = country = variant = null;
	if (locale != null) {
		char sep = '_';
		int length = locale.length();
		int firstSep, secondSep;
		
		firstSep = locale.indexOf(sep);
		if (firstSep == -1) {
			firstSep = secondSep = length;
		} else {
			secondSep = locale.indexOf(sep, firstSep + 1);
			if (secondSep == -1) secondSep = length;
		}
		if (firstSep > 0) lang = locale.substring(0, firstSep);
		if (secondSep > firstSep + 1) country = locale.substring(firstSep + 1, secondSep);
		if (length > secondSep + 1) variant = locale.substring(secondSep + 1);
	}
	if (lang == null) {
		data.lfCharSet = (byte)OS.DEFAULT_CHARSET;
	} else {
		Callback callback = new Callback (this, "EnumLocalesProc", 1);
		int lpEnumLocalesProc = callback.getAddress ();	
		OS.EnumSystemLocales(lpEnumLocalesProc, OS.LCID_SUPPORTED);
		callback.dispose ();
	}
}

/**
 * Sets the name of the receiver.
 * <p>
 * Some platforms support font foundries. On these platforms, the name
 * of the font specified in setName() may have one of the following forms:
 * <ol>
 * <li>a face name (for example, "courier")</li>
 * <li>a foundry followed by a dash ("-") followed by a face name (for example, "adobe-courier")</li>
 * </ol>
 * In either case, the name returned from getName() will include the
 * foundry.
 * </p>
 * <p>
 * On platforms that do not support font foundries, only the face name
 * (for example, "courier") is used in <code>setName()</code> and 
 * <code>getName()</code>.
 * </p>
 *
 * @param name the name of the font data (must not be null)
 * @exception IllegalArgumentException <ul>
 *    <li>ERROR_NULL_ARGUMENT - when the font name is null</li>
 * </ul>
 *
 * @see #getName
 */
public void setName(String name) {
	if (name == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);

	/* The field lfFaceName must be NULL terminated */
	TCHAR buffer = new TCHAR(0, name, true);
	int length = Math.min(OS.LF_FACESIZE - 1, buffer.length());
	if (OS.IsUnicode) {
		char[] lfFaceName = ((LOGFONTW)data).lfFaceName;
		for (int i = 0; i < lfFaceName.length; i++) lfFaceName[i] = 0;
		System.arraycopy(buffer.chars, 0, lfFaceName, 0, length);
	} else {
		byte[] lfFaceName = ((LOGFONTA)data).lfFaceName;
		for (int i = 0; i < lfFaceName.length; i++) lfFaceName[i] = 0;
		System.arraycopy(buffer.bytes, 0, lfFaceName, 0, length);
	}
}

/**
 * Sets the style of the receiver to the argument which must
 * be a bitwise OR of one or more of the <code>SWT</code> 
 * constants NORMAL, BOLD and ITALIC.
 *
 * @param style the new style for this <code>FontData</code>
 *
 * @see #getStyle
 */
public void setStyle(int style) {
	if ((style & SWT.BOLD) == SWT.BOLD) {
		data.lfWeight = 700;
	} else {
		data.lfWeight = 0;
	}
	if ((style & SWT.ITALIC) == SWT.ITALIC) {
		data.lfItalic = 1;
	} else {
		data.lfItalic = 0;
	}
}

/**
 * Returns a string representation of the receiver which is suitable
 * for constructing an equivalent instance using the 
 * <code>FontData(String)</code> constructor.
 *
 * @return a string representation of the FontData
 *
 * @see FontData
 */
public String toString() {
	StringBuffer buffer = new StringBuffer();
	buffer.append("1|");
	buffer.append(getName());
	buffer.append("|");
	buffer.append(getHeight());
	buffer.append("|");
	buffer.append(getStyle());
	buffer.append("|");
	buffer.append("WINDOWS|1|");	
	buffer.append(data.lfHeight);
	buffer.append("|");
	buffer.append(data.lfWidth);    
	buffer.append("|");
	buffer.append(data.lfEscapement); 
	buffer.append("|");
	buffer.append(data.lfOrientation);    
	buffer.append("|");
	buffer.append(data.lfWeight);    
	buffer.append("|");
	buffer.append(data.lfItalic);    
	buffer.append("|");
	buffer.append(data.lfUnderline); 
	buffer.append("|");
	buffer.append(data.lfStrikeOut);    
	buffer.append("|");
	buffer.append(data.lfCharSet);    
	buffer.append("|");
	buffer.append(data.lfOutPrecision); 
	buffer.append("|");
	buffer.append(data.lfClipPrecision);    
	buffer.append("|");
	buffer.append(data.lfQuality);    
	buffer.append("|");
	buffer.append(data.lfPitchAndFamily);
	buffer.append("|");
	buffer.append(getName());
	return buffer.toString();
}

/**	 
 * Invokes platform specific functionality to allocate a new font data.
 * <p>
 * <b>IMPORTANT:</b> This method is <em>not</em> part of the public
 * API for <code>FontData</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 data the <code>LOGFONT</code> for the font data
 * @param height the height of the font data
 * @return a new font data object containing the specified <code>LOGFONT</code> and height
 */
public static FontData win32_new(LOGFONT data, int height) {
	return new FontData(data, height);
}

}