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// THIS FILE HAS BEEN GENERATED BY A PREPROCESSOR.
/* +=======================================================================
* |
* | PlantUML : a free UML diagram generator
* |
* +=======================================================================
*
* (C) Copyright 2009-2024, Arnaud Roques
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*
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* (see https://plantuml.com/graphviz-dot )
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* Icons provided by OpenIconic : https://useiconic.com/open
* Archimate sprites provided by Archi : http://www.archimatetool.com
* Stdlib AWS provided by https://github.com/milo-minderbinder/AWS-PlantUML
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* ASCIIMathML (c) Peter Jipsen http://www.chapman.edu/~jipsen
* ASCIIMathML (c) David Lippman http://www.pierce.ctc.edu/dlippman
* CafeUndZopfli ported by Eugene Klyuchnikov https://github.com/eustas/CafeUndZopfli
* Brotli (c) by the Brotli Authors https://github.com/google/brotli
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*
*/
package org.stathissideris.ascii2image.graphics;
import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.Graphics2D;
import java.awt.font.FontRenderContext;
import java.awt.geom.Rectangle2D;
import java.awt.image.BufferedImage;
/**
*
* @author Efstathios Sideris
*/
public class FontMeasurer {
private final Font baseFont;
private boolean forceFontSize;
private FontRenderContext fakeRenderContext;
private Graphics2D fakeGraphics;
public FontMeasurer(Font font, boolean forceFontSize){
this.baseFont = font;
this.forceFontSize = forceFontSize;
BufferedImage image = new BufferedImage(1,1, BufferedImage.TYPE_INT_RGB);
fakeGraphics = image.createGraphics();
fakeRenderContext = fakeGraphics.getFontRenderContext();
}
public int getWidthFor(String str, int pixelHeight){
Font font = getFontFor(pixelHeight);
Rectangle2D rectangle = font.getStringBounds(str, fakeRenderContext);
return (int) rectangle.getWidth();
}
public int getHeightFor(String str, int pixelHeight){
Font font = getFontFor(pixelHeight);
Rectangle2D rectangle = font.getStringBounds(str, fakeRenderContext);
return (int) rectangle.getHeight();
}
public int getWidthFor(String str, Font font){
Rectangle2D rectangle = font.getStringBounds(str, fakeRenderContext);
return (int) rectangle.getWidth();
}
public int getHeightFor(String str, Font font){
Rectangle2D rectangle = font.getStringBounds(str, fakeRenderContext);
return (int) rectangle.getHeight();
}
public Rectangle2D getBoundsFor(String str, Font font){
return font.getStringBounds(str, fakeRenderContext);
}
public int getAscent(Font font){
fakeGraphics.setFont(font);
FontMetrics metrics = fakeGraphics.getFontMetrics();
return metrics.getAscent();
}
public int getZHeight(Font font){
return (int) font.createGlyphVector(fakeRenderContext, "Z").getOutline().getBounds().getHeight();
}
public Font getFontFor(final int maxWidth, final String string){
if (forceFontSize)
{
return baseFont;
}
else
{
FontPredicate predicate = new FontPredicate() {
@Override
public boolean test(Font font)
{
int width = getWidthFor(string, font);
return width > maxWidth;
}
};
return deriveFont(predicate, 1.0f);
}
}
public Font getFontFor(final int pixelHeight){
if (forceFontSize)
{
return baseFont;
}
else
{
FontPredicate predicate = new FontPredicate() {
@Override
public boolean test(Font font)
{
//ascent is the distance between the baseline and the tallest character
int ascent = getAscent(font);
return ascent > pixelHeight;
}
};
return deriveFont(predicate, 0.5f);
}
}
private Font deriveFont(FontPredicate predicate, float sizeDelta)
{
Font currentFont = baseFont;
float size = baseFont.getSize2D();
int direction; //direction of size change (towards smaller or bigger)
if(predicate.test(currentFont)){
currentFont = currentFont.deriveFont(size - 1f);
size--;
direction = -1;
} else {
currentFont = currentFont.deriveFont(size + 1f);
size++;
direction = 1;
}
while(size > 0){
currentFont = currentFont.deriveFont(size);
//rectangle = currentFont.getStringBounds(testString, frc);
if (direction == 1) {
if (predicate.test(currentFont)) {
size = size - sizeDelta;
return currentFont.deriveFont(size);
} else {
size = size + sizeDelta;
}
} else {
if (!predicate.test(currentFont)) {
return currentFont;
} else {
size = size - sizeDelta;
}
}
}
return null;
}
private interface FontPredicate {
boolean test(Font font);
}
}
