/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* @author Ilya S. Okomin
*/
package org.apache.harmony.awt.gl.font;
import com.jgraph.gaeawt.java.awt.Font;
import com.jgraph.gaeawt.java.awt.FontMetrics;
import com.jgraph.gaeawt.java.awt.geom.AffineTransform;
/**
* FontMetrics implementation
*/
public class FontMetricsImpl extends FontMetrics {
private static final long serialVersionUID = 844695615201925138L;
// ascent of the font
private int ascent;
//descent of the font
private int descent;
// leading of the font
private int leading;
// maximum ascent of the font
private int maxAscent;
// maximum descent of the font
private int maxDescent;
// maximum advance of the font
private int maxAdvance;
// array of char advance widths
private int[] widths = new int[256];
// font peer corresponding to this FontPeerImpl
private transient FontPeerImpl peer;
// X scale parameter of the font transform
private float scaleX = 1;
// Y scale parameter of the font transform
// private float scaleY = 1;
/**
* Creates new FontMericsImpl object described by the specified Font.
*
* @param fnt the specified Font object
*/
public FontMetricsImpl(Font fnt) {
super(fnt);
peer = getFontPeer();
AffineTransform at = fnt.getTransform();
if (!at.isIdentity()){
scaleX = (float)at.getScaleX();
// scaleY = (float)at.getScaleY();
}
LineMetricsImpl lm = (LineMetricsImpl)peer.getLineMetrics("", null, at); //$NON-NLS-1$
this.ascent = lm.getLogicalAscent();
this.descent = lm.getLogicalDescent();
this.leading = lm.getLogicalLeading();
this.maxAscent = ascent;
this.maxDescent = descent;
this.maxAdvance = lm.getLogicalMaxCharWidth();
}
/**
* Returns the ascent of the Font describing this FontMetricsImpl object.
*/
@Override
public int getAscent() {
return this.ascent;
}
/**
* Returns the descent of the Font describing this FontMetricsImpl object.
*/
@Override
public int getDescent() {
return this.descent;
}
/**
* Returns the leading of the Font describing this FontMetricsImpl object.
*/
@Override
public int getLeading() {
return this.leading;
}
/**
* Returns the advance width of the specified char of the Font
* describing this FontMetricsImpl object.
*
* @param ch the char which width is to be returned
* @return the advance width of the specified char of the Font
* describing this FontMetricsImpl object
*/
@Override
public int charWidth(int ch) {
// if (ch < 256){
// return widths[ch];
// }
return getFontPeer().charWidth((char)ch);
}
/**
* Returns the advance width of the specified char of the Font
* describing this FontMetricsImpl object.
*
* @param ch the char which width is to be returned
* @return the advance width of the specified char of the Font
* describing this FontMetricsImpl object
*/
@Override
public int charWidth(char ch) {
// if (ch < 256){
// return widths[ch];
// }
return (int)(getFontPeer().charWidth(ch)*scaleX);
}
/**
* Returns the maximum advance of the Font describing this
* FontMetricsImpl object.
*/
@Override
public int getMaxAdvance() {
return this.maxAdvance;
}
/**
* Returns the maximum ascent of the Font describing this
* FontMetricsImpl object.
*/
@Override
public int getMaxAscent() {
return this.maxAscent;
}
/**
* Returns the maximum descent of the Font describing this
* FontMetricsImpl object.
*/
@Deprecated
@Override
public int getMaxDecent() {
return this.maxDescent;
}
/**
* Returns the maximum descent of the Font describing this
* FontMetricsImpl object.
*/
@Override
public int getMaxDescent() {
return this.maxDescent;
}
/**
* Returns the advance widths of the first 256 characters in the Font
* describing this FontMetricsImpl object.
*/
@Override
public int[] getWidths() {
this.widths = new int[256];
for (int chr=0; chr < 256; chr++){
widths[chr] = (int)(getFontPeer().charWidth((char)chr)*scaleX);
}
return this.widths;
}
/**
* Returns the total advance width of the specified string in the metrics
* of the Font describing this FontMetricsImpl object.
*
* @param str the String which width is to be measured
* @return the total advance width of the specified string in the metrics
* of the Font describing this FontMetricsImpl object
*/
@Override
public int stringWidth(String str) {
int width = 0;
char chr;
for (int i = 0; i < str.length(); i++){
chr = str.charAt(i);
width += charWidth(chr);
}
return width;
}
/**
* Returns FontPeer implementation of the Font describing this
* FontMetricsImpl object.
*
* @return a FontPeer object, that is the platform dependent FontPeer
* implementation for the Font describing this FontMetricsImpl object.
*/
@SuppressWarnings("deprecation")
public FontPeerImpl getFontPeer(){
if (peer == null){
peer = (FontPeerImpl)font.getPeer();
}
return peer;
}
}