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PlantUML is a component that allows to quickly write diagrams from text.
There is a newer version: 1.2024.8
// THIS FILE HAS BEEN GENERATED BY A PREPROCESSOR.
/* +=======================================================================
 * |
 * |      PlantUML : a free UML diagram generator
 * |
 * +=======================================================================
 *
 * (C) Copyright 2009-2024, Arnaud Roques
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 * Project Info:  https://plantuml.com
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 * PlantUML is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License V2.
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 * THE ACCOMPANYING PROGRAM IS PROVIDED UNDER THE TERMS OF THIS ECLIPSE PUBLIC
 * LICENSE ("AGREEMENT"). [GNU General Public License V2]
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 * RECIPIENT'S ACCEPTANCE OF THIS AGREEMENT.
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 * You may obtain a copy of the License at
 *
 * https://www.gnu.org/licenses/old-licenses/gpl-2.0.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.
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 * 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
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 * 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 GPL v2 license.
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 * This is the IGY distribution (Install GraphViz by Yourself).
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 * CafeUndZopfli ported by Eugene Klyuchnikov https://github.com/eustas/CafeUndZopfli
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 */
package net.sourceforge.plantuml.project.draw;

import java.util.Locale;

import net.sourceforge.plantuml.klimt.color.HColor;
import net.sourceforge.plantuml.klimt.drawing.UGraphic;
import net.sourceforge.plantuml.project.TimeHeaderParameters;
import net.sourceforge.plantuml.project.time.Day;
import net.sourceforge.plantuml.project.timescale.TimeScale;

public abstract class TimeHeaderCalendar extends TimeHeader {

	public TimeHeaderCalendar(TimeHeaderParameters thParam, TimeScale timeScale) {
		super(thParam, timeScale);
	}

	protected final Locale locale() {
		return thParam.getLocale();
	}

	protected final int getLoadAt(Day instant) {
		return thParam.getLoadPlanable().getLoadAt(instant);
	}
	
	// Duplicate in TimeHeaderSimple
	class Pending {
		final double x1;
		double x2;
		final HColor color;

		Pending(HColor color, double x1, double x2) {
			this.x1 = x1;
			this.x2 = x2;
			this.color = color;
		}

		public void draw(UGraphic ug, double height) {
			drawRectangle(ug.apply(color.bg()), height, x1, x2);
		}
	}

	protected final void drawTextsBackground(UGraphic ug, double totalHeightWithoutFooter) {

		final double height = totalHeightWithoutFooter - getFullHeaderHeight(ug.getStringBounder());
		Pending pending = null;

		for (Day wink = getMin(); wink.compareTo(getMax()) <= 0; wink = wink.increment()) {
			final double x1 = getTimeScale().getStartingPosition(wink);
			final double x2 = getTimeScale().getEndingPosition(wink);
			HColor back = thParam.getColor(wink);
			// Day of week should be stronger than period of time (back color).
			final HColor backDoW = thParam.getColor(wink.getDayOfWeek());
			if (backDoW != null)
				back = backDoW;

			if (back == null && getLoadAt(wink) == 0)
				back = closedBackgroundColor();

			if (back == null) {
				if (pending != null)
					pending.draw(ug, height);
				pending = null;
			} else {
				if (pending != null && pending.color.equals(back) == false) {
					pending.draw(ug, height);
					pending = null;
				}
				if (pending == null)
					pending = new Pending(back, x1, x2);
				else
					pending.x2 = x2;

			}
		}

		if (pending != null)
			pending.draw(ug, height);

	}

}