1 files changed, 120 insertions, 0 deletions
diff --git a/src/net/sourceforge/plantuml/Direction.java b/src/net/sourceforge/plantuml/Direction.java
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+++ b/src/net/sourceforge/plantuml/Direction.java
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+/* ========================================================================
+ * PlantUML : a free UML diagram generator
+ * ========================================================================
+ *
+ * (C) Copyright 2009-2014, Arnaud Roques
+ *
+ * Project Info:  http://plantuml.sourceforge.net
+ * 
+ * This file is part of PlantUML.
+ *
+ * Licensed under The MIT License (Massachusetts Institute of Technology License)
+ * 
+ * See http://opensource.org/licenses/MIT
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
+ * IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ * 
+ *
+ * Original Author:  Arnaud Roques
+ */
+package net.sourceforge.plantuml;
+
+import java.awt.geom.Point2D;
+
+public enum Direction {
+	RIGHT, LEFT, DOWN, UP;
+
+	public Direction getInv() {
+		if (this == RIGHT) {
+			return LEFT;
+		}
+		if (this == LEFT) {
+			return RIGHT;
+		}
+		if (this == DOWN) {
+			return UP;
+		}
+		if (this == UP) {
+			return DOWN;
+		}
+		throw new IllegalStateException();
+	}
+
+	public static Direction fromChar(char c) {
+		if (c == '<') {
+			return Direction.LEFT;
+		}
+		if (c == '>') {
+			return Direction.RIGHT;
+		}
+		if (c == '^') {
+			return Direction.UP;
+		}
+		return Direction.DOWN;
+	}
+
+	public Direction clockwise() {
+		if (this == RIGHT) {
+			return DOWN;
+		}
+		if (this == LEFT) {
+			return UP;
+		}
+		if (this == DOWN) {
+			return LEFT;
+		}
+		if (this == UP) {
+			return RIGHT;
+		}
+		throw new IllegalStateException();
+	}
+
+	public static Direction leftOrRight(Point2D p1, Point2D p2) {
+		if (p1.getX() < p2.getX()) {
+			return Direction.LEFT;
+		}
+		if (p1.getX() > p2.getX()) {
+			return Direction.RIGHT;
+		}
+		throw new IllegalArgumentException();
+	}
+
+	public static Direction fromVector(Point2D p1, Point2D p2) {
+		final double x1 = p1.getX();
+		final double y1 = p1.getY();
+		final double x2 = p2.getX();
+		final double y2 = p2.getY();
+		if (x1 == x2 && y1 == y2) {
+			return null;
+		}
+		if (x1 == x2) {
+			if (y2 > y1) {
+				return Direction.DOWN;
+			}
+			return Direction.UP;
+		}
+		if (y1 == y2) {
+			if (x2 > x1) {
+				return Direction.RIGHT;
+			}
+			return Direction.LEFT;
+		}
+		throw new IllegalArgumentException("Not a H or V line!");
+
+	}
+}