mirror of https://github.com/octoleo/plantuml.git
182 lines
5.8 KiB
Java
182 lines
5.8 KiB
Java
/* ========================================================================
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* PlantUML : a free UML diagram generator
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* ========================================================================
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*
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* (C) Copyright 2009-2023, Arnaud Roques
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*
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* Project Info: http://plantuml.com
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*
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* If you like this project or if you find it useful, you can support us at:
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*
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* http://plantuml.com/patreon (only 1$ per month!)
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* http://plantuml.com/paypal
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*
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* This file is part of PlantUML.
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*
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* PlantUML is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* PlantUML distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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* License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
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* USA.
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*
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*
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* Original Author: Arnaud Roques
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*
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*
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*/
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package net.sourceforge.plantuml;
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import java.awt.Color;
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import java.awt.Font;
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import java.awt.FontMetrics;
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import java.awt.Graphics2D;
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import java.awt.geom.AffineTransform;
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import java.awt.geom.Rectangle2D;
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import java.awt.image.BufferedImage;
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import java.util.ArrayList;
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import java.util.List;
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import net.sourceforge.plantuml.cucadiagram.dot.GraphvizUtils;
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import net.sourceforge.plantuml.graphic.StringBounder;
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import net.sourceforge.plantuml.ugraphic.UAntiAliasing;
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import net.sourceforge.plantuml.ugraphic.color.ColorMapper;
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import net.sourceforge.plantuml.ugraphic.color.HColor;
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import net.sourceforge.plantuml.ugraphic.color.HColors;
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import net.sourceforge.plantuml.ugraphic.g2d.UGraphicG2d;
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import net.sourceforge.plantuml.utils.Log;
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public class EmptyImageBuilder {
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private final BufferedImage im;
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private final Graphics2D g2d;
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private final Color background;
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private final StringBounder stringBounder;
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private static EmptyImageBuilder create(String watermark, int width, int height, Color background,
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StringBounder stringBounder, double dpiFactor) {
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EmptyImageBuilder result = new EmptyImageBuilder(watermark, (int) (width * dpiFactor),
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(int) (height * dpiFactor), background, stringBounder);
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if (dpiFactor != 1.0)
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result.g2d.setTransform(AffineTransform.getScaleInstance(dpiFactor, dpiFactor));
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return result;
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}
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public EmptyImageBuilder(String watermark, int width, int height, Color background, StringBounder stringBounder) {
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if (width <= 0 || height <= 0)
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throw new IllegalArgumentException("width and height must be positive");
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// ::comment when WASM
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if (width > GraphvizUtils.getenvImageLimit()) {
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Log.info("Width too large " + width + ". You should set PLANTUML_LIMIT_SIZE");
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width = GraphvizUtils.getenvImageLimit();
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}
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if (height > GraphvizUtils.getenvImageLimit()) {
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Log.info("Height too large " + height + ". You should set PLANTUML_LIMIT_SIZE");
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height = GraphvizUtils.getenvImageLimit();
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}
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// ::done
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this.background = background;
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this.stringBounder = stringBounder;
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Log.info("Creating image " + width + "x" + height);
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im = new BufferedImage(width, height, getType(background));
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g2d = im.createGraphics();
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UAntiAliasing.ANTI_ALIASING_ON.apply(g2d);
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if (background != null) {
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g2d.setColor(background);
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g2d.fillRect(0, 0, width, height);
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}
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if (watermark != null) {
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final int gray = 200;
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g2d.setColor(new Color(gray, gray, gray));
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printWatermark(watermark, width, height);
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}
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}
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private int getType(Color background) {
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if (background == null) {
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return BufferedImage.TYPE_INT_ARGB;
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}
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if (background.getAlpha() != 255) {
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return BufferedImage.TYPE_INT_ARGB;
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}
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return BufferedImage.TYPE_INT_RGB;
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}
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private void printWatermark(String watermark, int maxWidth, int maxHeight) {
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final Font javaFont = g2d.getFont();
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final FontMetrics fm = g2d.getFontMetrics(javaFont);
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final Rectangle2D rect = fm.getStringBounds(watermark, g2d);
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final int height = (int) rect.getHeight();
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final int width = (int) rect.getWidth();
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if (height < 2 || width < 2) {
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return;
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}
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if (width <= maxWidth)
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for (int y = height; y < maxHeight; y += height + 1) {
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for (int x = 0; x < maxWidth; x += width + 10) {
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g2d.drawString(watermark, x, y);
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}
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}
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else {
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final List<String> withBreaks = withBreaks(watermark, javaFont, fm, maxWidth);
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int y = 0;
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while (y < maxHeight) {
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for (String s : withBreaks) {
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g2d.drawString(s, 0, y);
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y += (int) fm.getStringBounds(s, g2d).getHeight();
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}
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y += 10;
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}
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}
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}
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private int getWidth(String line, Font javaFont, FontMetrics fm) {
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final Rectangle2D rect = fm.getStringBounds(line, g2d);
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return (int) rect.getWidth();
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}
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private List<String> withBreaks(String watermark, Font javaFont, FontMetrics fm, int maxWidth) {
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final String[] words = watermark.split("\\s+");
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final List<String> result = new ArrayList<>();
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String pending = "";
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for (String word : words) {
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final String candidate = pending.length() == 0 ? word : pending + " " + word;
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if (getWidth(candidate, javaFont, fm) < maxWidth) {
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pending = candidate;
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} else {
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result.add(pending);
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pending = word;
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}
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}
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if (pending.length() > 0) {
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result.add(pending);
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}
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return result;
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}
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public BufferedImage getBufferedImage() {
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return im;
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}
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public Graphics2D getGraphics2D() {
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return g2d;
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}
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public UGraphicG2d getUGraphicG2d() {
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final HColor back = HColors.simple(background);
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final UGraphicG2d result = new UGraphicG2d(back, ColorMapper.IDENTITY, stringBounder, g2d, 1.0);
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result.setBufferedImage(im);
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return result;
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}
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}
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