FontStyle.java

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 * PlantUML : a free UML diagram generator
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 * (C) Copyright 2009-2024, Arnaud Roques
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 * Original Author:  Arnaud Roques
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package net.sourceforge.plantuml.klimt.font;

import java.awt.Font;
import java.util.EnumSet;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import net.sourceforge.plantuml.Lazy;
import net.sourceforge.plantuml.klimt.color.HColor;
import net.sourceforge.plantuml.klimt.color.HColorSet;

public enum FontStyle {

	PLAIN, ITALIC, BOLD, UNDERLINE, STRIKE, WAVE, BACKCOLOR;

	private final Lazy<Pattern> activation = new Lazy<>(() -> Pattern.compile(getActivationPattern()));
	private final Lazy<Pattern> deactivation = new Lazy<>(() -> Pattern.compile(getDeactivationPattern()));

	public UFont mutateFont(UFont font) {
		if (this == PLAIN)
			return font.withStyle(Font.PLAIN);

		if (this == ITALIC)
			return font.withStyle(font.getStyle() | Font.ITALIC);

		if (this == BOLD)
			return font.withStyle(font.getStyle() | Font.BOLD);

		return font;
	}

	public String getActivationPattern() {
		if (this == PLAIN)
			return "\\<[pP][lL][aA][iI][nN]\\>";

		if (this == ITALIC)
			return "\\<[iI]\\>";

		if (this == BOLD)
			return "\\<[bB]\\>";

		if (this == UNDERLINE)
			return "\\<[uU](?::(#[0-9a-fA-F]{6}|\\w+))?\\>";

		if (this == WAVE)
			return "\\<[wW](?::(#[0-9a-fA-F]{6}|\\w+))?\\>";

		if (this == BACKCOLOR)
			// return "\\<[bB][aA][cC][kK](?::(#[0-9a-fA-F]{6}|\\w+))?\\>";
			return "\\<[bB][aA][cC][kK](?::(#?\\w+(?:[-\\\\|/]#?\\w+)?))?\\>";

		if (this == STRIKE)
			return "\\<(?:s|S|strike|STRIKE|del|DEL)(?::(#[0-9a-fA-F]{6}|\\w+))?\\>";

		return null;
	}

	public boolean canHaveExtendedColor() {
		if (this == UNDERLINE)
			return true;

		if (this == WAVE)
			return true;

		if (this == BACKCOLOR)
			return true;

		if (this == STRIKE)
			return true;

		return false;
	}

	public String getCreoleSyntax() {
		if (this == ITALIC)
			return "//";

		if (this == BOLD)
			return "\\*\\*";

		if (this == UNDERLINE)
			return "__";

		if (this == WAVE)
			return "~~";

		if (this == STRIKE)
			return "--";

		throw new UnsupportedOperationException();
	}

	// ::comment when __HAXE__
	public HColor getExtendedColor(String s) {
		final Matcher m = activation.get().matcher(s);
		if (m.find() == false || m.groupCount() != 1)
			return null;

		final String color = m.group(1);
		if (color == null)
			return null;

		return HColorSet.instance().getColorOrWhite(color);
	}
	// ::done

	public String getDeactivationPattern() {
		if (this == PLAIN)
			return "\\</[pP][lL][aA][iI][nN]\\>";

		if (this == ITALIC)
			return "\\</[iI]\\>";

		if (this == BOLD)
			return "\\</[bB]\\>";

		if (this == UNDERLINE)
			return "\\</[uU]\\>";

		if (this == WAVE)
			return "\\</[wW]\\>";

		if (this == BACKCOLOR)
			return "\\</[bB][aA][cC][kK]\\>";

		if (this == STRIKE)
			return "\\</(?:s|S|strike|STRIKE|del|DEL)\\>";

		return null;
	}

	public static FontStyle getStyle(String line) {
		for (FontStyle style : EnumSet.allOf(FontStyle.class))
			if (style.activation.get().matcher(line).matches() || style.deactivation.get().matcher(line).matches())
				return style;

		throw new IllegalArgumentException(line);
	}

}