ValueImpl.java

/* ========================================================================
 * PlantUML : a free UML diagram generator
 * ========================================================================
 *
 * (C) Copyright 2009-2024, Arnaud Roques
 *
 * Project Info:  https://plantuml.com
 * 
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 *
 * PlantUML distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
 * License for more details.
 *
 * You should have received a copy of the GNU General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
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 * Original Author:  Arnaud Roques
 *
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 */
package net.sourceforge.plantuml.style.value;

import java.util.Objects;

import net.sourceforge.plantuml.klimt.color.HColor;
import net.sourceforge.plantuml.klimt.color.HColorSet;
import net.sourceforge.plantuml.klimt.color.HColors;
import net.sourceforge.plantuml.klimt.font.UFontFace;
import net.sourceforge.plantuml.klimt.geom.HorizontalAlignment;
import net.sourceforge.plantuml.style.AutomaticCounter;

public class ValueImpl implements Value {

	private final DarkString value;

	public static ValueImpl dark(String value, AutomaticCounter counter) {
		return new ValueImpl(new DarkString(null, Objects.requireNonNull(value), Specificity.atOrder(counter.getNextInt())));
	}

	public static ValueImpl regular(String value, AutomaticCounter counter) {
		return new ValueImpl(new DarkString(Objects.requireNonNull(value), null, Specificity.atOrder(counter.getNextInt())));
	}

	public static ValueImpl regular(String value, Specificity specificity) {
		return new ValueImpl(new DarkString(Objects.requireNonNull(value), null, specificity));
	}

	/**
	 * A value that may already carry both a light and a dark half at an explicit specificity --
	 * unlike {@link #regular} and {@link #dark}, which always create a one-sided value from a
	 * counter. Used when converting an already-resolved
	 * {@code net.sourceforge.plantuml.style.parser2.PrioritizedValue} (light and dark already
	 * folded together by {@code MergedStyleNode#mergeRule}) back into this legacy representation,
	 * so that fold is not redone here. Either {@code light} or {@code dark} (never both) may be
	 * null.
	 */
	public static ValueImpl of(String light, String dark, Specificity specificity) {
		return new ValueImpl(new DarkString(light, dark, specificity));
	}

	public Value mergeWith(Value other) {
		if (other == null)
			return this;
		if (other instanceof ValueImpl)
			return new ValueImpl(value.mergeWith(((ValueImpl) other).value));
		if (other instanceof ValueColor) {
			if (other.getSpecificity().isBiggerThan(getSpecificity()))
				return other;
			return this;
		}
		throw new UnsupportedOperationException();
	}

	private ValueImpl(DarkString value) {
		this.value = value;
	}

	public Value withAncestorRank(int rank) {
		return new ValueImpl(value.withAncestorRank(rank));
	}

	public Value withStereotypeCount(int count) {
		return new ValueImpl(value.withStereotypeCount(count));
	}

	@Override
	public String toString() {
		return value.toString();
	}

	public String asString() {
		return value.getValue1();
	}

	public HColor asColor(HColorSet set) {
		final String value1 = value.getValue1();
		if ("none".equalsIgnoreCase(value1))
			return HColors.transparent();

		if ("transparent".equalsIgnoreCase(value1))
			return HColors.transparent();

		if (value1 == null)
			throw new IllegalArgumentException(value.toString());

		final HColor result = set.getColorOrWhite(value1);
		if (value.getValue2() != null) {
			final HColor dark = set.getColorOrWhite(value.getValue2());
			return result.withDark(dark);
		}
		return result;
	}

	@Override
	public boolean asBoolean() {
		return "true".equalsIgnoreCase(value.getValue1());
	}

	private int asIntCache = Integer.MIN_VALUE;
	private int asIntButMinusOneIfErrorCache = Integer.MIN_VALUE;
	private double asDoubleCache = Double.MIN_VALUE;

	@Override
	public int asInt() {
		if (asIntCache == Integer.MIN_VALUE) {
			final String s = extractDigits();
			if (s.length() == 0)
				asIntCache = 0;
			else
				asIntCache = Integer.parseInt(s);
		}
		return asIntCache;
	}

	@Override
	public int asIntButMinusOneIfError() {
		if (asIntButMinusOneIfErrorCache == Integer.MIN_VALUE) {
			final String s = extractDigits();
			if (s.length() == 0)
				asIntButMinusOneIfErrorCache = -1;
			else
				asIntButMinusOneIfErrorCache = Integer.parseInt(s);
		}
		return asIntButMinusOneIfErrorCache;
	}

	private String extractDigits() {
		final String s = value.getValue1();
		final StringBuilder sb = new StringBuilder(s.length());
		for (int i = 0; i < s.length(); i++) {
			final char c = s.charAt(i);
			if (c >= '0' && c <= '9')
				sb.append(c);
		}
		return sb.toString();
	}


	public double asDouble() {
		if (asDoubleCache == Double.MIN_VALUE) {
			final String s = value.getValue1();
			final StringBuilder sb = new StringBuilder(s.length());
			for (int i = 0; i < s.length(); i++) {
				final char c = s.charAt(i);
				if (c >= '0' && c <= '9' || c == '.')
					sb.append(c);

			}
			if (sb.length() == 0)
				asDoubleCache = Double.NaN;
			else
				asDoubleCache = Double.parseDouble(sb.toString());
		}
		return asDoubleCache;
	}

	public double asDoubleDefaultTo(double defaultValue) {
		final double s = asDouble();
		if (s == Double.NaN)
			return defaultValue;
		return s;
	}

	public UFontFace asFontFace() {
		final String raw = value.getValue1();
		if (raw == null || raw.isEmpty())
			return UFontFace.normal();

		final String s = raw.trim().toLowerCase();
		if ("bold".equals(s))
			return UFontFace.bold();
		if ("italic".equals(s))
			return UFontFace.italic();
		if ("plain".equals(s) || "normal".equals(s))
			return UFontFace.normal();

		// Try parsing as a CSS numeric weight (100-900)
		final UFontFace fromCss = UFontFace.fromCssWeight(s);
		if (fromCss != null)
			return fromCss;

		return UFontFace.normal();
	}

	public HorizontalAlignment asHorizontalAlignment() {
		return HorizontalAlignment.fromString(asString());
	}

	public Specificity getSpecificity() {
		return value.getSpecificity();
	}

}