Used in layout calculations

git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/trunk@194540 13f79535-47bb-0310-9956-ffa450edef68

1 files changed, 61 insertions, 0 deletions

diff --git a/src/org/apache/fop/area/MinOptMax.java b/src/org/apache/fop/area/MinOptMax.java
new file mode 100644
index 000000000..e7ed4add5
--- /dev/null
+++ b/src/org/apache/fop/area/MinOptMax.java
@@ -0,0 +1,61 @@
+/*
+ * $Id$
+ * Copyright (C) 2001 The Apache Software Foundation. All rights reserved.
+ * For details on use and redistribution please refer to the
+ * LICENSE file included with these sources.
+ */
+
+package org.apache.fop.area;
+
+/**
+ * This class holds the resolved (as mpoints) form of a LengthRange or
+ * Space type Property value.
+ * MinOptMax values are used during layout calculations. The instance
+ * variables are package visible.
+ */
+
+public class MinOptMax {
+
+    /** Publicly visible min(imum), opt(imum) and max(imum) values.*/
+    public int min;
+    public int opt;
+    public int max;
+
+    public MinOptMax() {
+	this(0);
+    }
+
+    public MinOptMax(int val) {
+	this(val, val, val);
+    }
+
+    public MinOptMax(int min, int opt, int max) {
+	this.min = min;
+	this.opt = opt;
+	this.max = max;
+    }
+
+    public static MinOptMax subtract(MinOptMax op1, MinOptMax op2) {
+	return new MinOptMax(op1.min - op2.max, op1.opt - op2.opt,
+			     op1.max - op2.min);
+    }
+
+    public static MinOptMax add(MinOptMax op1, MinOptMax op2) {
+	return new MinOptMax(op1.min + op2.min, op1.opt + op2.opt,
+			     op1.max + op2.max);
+    }
+
+    public void add(MinOptMax op) {
+	min += op.min;
+	opt += op.opt;
+	max += op.max;
+    }
+
+    public void subtract(MinOptMax op) {
+	min -= op.max;
+	opt -= op.opt;
+	max -= op.min;
+    }
+
+
+}