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PlantUML is a component that allows to quickly write diagrams from text.
// THIS FILE HAS BEEN GENERATED BY A PREPROCESSOR.
/* +=======================================================================
* |
* | PlantUML : a free UML diagram generator
* |
* +=======================================================================
*
* (C) Copyright 2009-2024, Arnaud Roques
*
* Project Info: https://plantuml.com
*
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*
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*
* PlantUML is free software; you can redistribute it and/or modify it
* under the terms of the Eclipse Public License.
*
* THE ACCOMPANYING PROGRAM IS PROVIDED UNDER THE TERMS OF THIS ECLIPSE PUBLIC
* LICENSE ("AGREEMENT"). [Eclipse Public License - v 1.0]
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* ANY USE, REPRODUCTION OR DISTRIBUTION OF THE PROGRAM CONSTITUTES
* RECIPIENT'S ACCEPTANCE OF THIS AGREEMENT.
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* You may obtain a copy of the License at
*
* http://www.eclipse.org/legal/epl-v10.html
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* 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.
*
* PlantUML can occasionally display sponsored or advertising messages. Those
* messages are usually generated on welcome or error images and never on
* functional diagrams.
* See https://plantuml.com/professional if you want to remove them
*
* Images (whatever their format : PNG, SVG, EPS...) generated by running PlantUML
* are owned by the author of their corresponding sources code (that is, their
* textual description in PlantUML language). Those images are not covered by
* this EPL license.
*
* The generated images can then be used without any reference to the EPL license.
* It is not even necessary to stipulate that they have been generated with PlantUML,
* although this will be appreciated by the PlantUML team.
*
* There is an exception : if the textual description in PlantUML language is also covered
* by any license, then the generated images are logically covered
* by the very same license.
*
* This is the IGY distribution (Install GraphViz by Yourself).
* You have to install GraphViz and to setup the GRAPHVIZ_DOT environment variable
* (see https://plantuml.com/graphviz-dot )
*
* 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
* Stdlib Icons provided https://github.com/tupadr3/plantuml-icon-font-sprites
* 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
* Themes (c) by Brett Schwarz https://github.com/bschwarz/puml-themes
* Twemoji (c) by Twitter at https://twemoji.twitter.com/
*
*/
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);
}
}