/*
* 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
* @version $Revision$
*/
package org.apache.harmony.awt.gl.font;
import com.android.internal.awt.AndroidGraphics2D;
import java.awt.Font;
import java.awt.FontMetrics;
//import java.awt.Paint;
import java.awt.geom.AffineTransform;
import android.graphics.Paint;
/**
* 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;
public AndroidGraphics2D mSg;
private Font mFn;
// 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);
this.mFn = fnt;
mSg = AndroidGraphics2D.getInstance();
Paint p = mSg.getAndroidPaint();
this.ascent = (int)-p.ascent();
this.descent = (int)p.descent();
this.leading = p.getFontMetricsInt().leading;
AffineTransform at = fnt.getTransform();
if (!at.isIdentity()) {
scaleX = (float) at.getScaleX();
scaleY = (float) at.getScaleY();
}
/*
* metrics[5] - strikethrough thickness<p>
* -metrics[6] - strikethrough offset<p>
* metrics[7] - maximum char width<p>
* metrics[8] - ascent in pixels<p>
* metrics[9] - descent in pixles<p>
* metrics[10] - external leading in pixels<p>
* metrics[11] - underline thickness in pixels<p>
* -metrics[12] - underline offset in pixels<p>
* metrics[13] - strikethrough thickness in pixels<p>
* -metrics[14] - strikethrough offset in pixels<p>
* metrics[15] - maximum char width in pixels<p>
* @param _baselineData an array of 3 elements with baseline offsets metrics<p>
* _baselineData[0] - roman baseline offset<p>
* _baselineData[1] - center baseline offset<p>
* _baselineData[2] - hanging baseline offset<p>
*/
}
/**
* Initialize the array of the first 256 chars' advance widths of the Font
* describing this FontMetricsImpl object.
*/
private void initWidths() {
this.widths = new int[256];
for (int chr = 0; chr < 256; chr++) {
widths[chr] = (int) (getFontPeer().charWidth((char) chr) * scaleX);
}
}
/**
* 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.
*/
@SuppressWarnings("deprecation")
@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() {
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;
/*
* float res = 0; int ln = str.length(); char[] c = new char[ln]; float[] f =
* new float[ln]; str.getChars(0, ln, c, 0); mSg.getPaint().getTextWidths(c, 0,
* ln, f);
*
* for(int i = 0; i < f.length; i++) { res += f[i]; } return (int)res;
*/
}
/**
* 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;
}
}