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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
 *
 * Project Info:  https://plantuml.com
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 * If you like this project or if you find it useful, you can support us at:
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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.
 *
 * THE ACCOMPANYING PROGRAM IS PROVIDED UNDER THE TERMS OF THIS ECLIPSE PUBLIC
 * LICENSE ("AGREEMENT"). [GNU General Public License V2]
 *
 * 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
 *
 * 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.
 *
 * 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.
 *
 * The generated images can then be used without any reference to the GPL v2 license.
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 * although this will be appreciated by the PlantUML team.
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 * by any license, then the generated images are logically covered
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 * This is the IGY distribution (Install GraphViz by Yourself).
 * You have to install GraphViz and to setup the GRAPHVIZ_DOT environment variable
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 * Icons provided by OpenIconic :  https://useiconic.com/open
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 * 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
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 *
 */
package net.sourceforge.plantuml.bpm;

public class CleanerMoveBlock implements GridCleaner {

	public boolean clean(Grid grid) {
		// System.err.println("CleanerMoveBlock");
		for (Line line : grid.lines().toList()) {
			tryGrid(grid, line);
		}
		return false;
	}

	private void tryGrid(Grid grid, Line line) {
		// System.err.println("TRYING LINE " + line);
		for (Col col1 : grid.cols().toList()) {
			final Placeable cell1 = grid.getCell(line, col1).getData();
			if (cell1 instanceof ConnectorPuzzleEmpty == false) {
				continue;
			}
			final ConnectorPuzzleEmpty puzzle1 = (ConnectorPuzzleEmpty) cell1;
			if (puzzle1.checkDirections("NS") == false) {
				continue;
			}
			final Navigator it2 = grid.cols().navigator(col1);
			int cpt = 0;
			while (true) {
				final Col col2 = it2.next();
				cpt++;
				if (col2 == null) {
					break;
				}
				if (col1 == col2) {
					continue;
				}
				final Placeable cell2 = grid.getCell(line, col2).getData();
				if (cell2 == null) {
					continue;
				}
				if (cell2 instanceof ConnectorPuzzleEmpty == false) {
					break;
				}
				final ConnectorPuzzleEmpty puzzle2 = (ConnectorPuzzleEmpty) cell2;
				if (puzzle2.checkDirections("NS") == false) {
					continue;
				}
				if (cpt > 1) {
					tryBridge(line, col1, col2);
				}
				break;
			}
		}

	}

	private void tryBridge(Line line, Col col1, final Col col2) {
		// System.err.println("LINE=" + line + " " + col1 + " " + col2 + " ");
	}
}