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Diffstat (limited to 'src/java/org/apache/fop/fo/properties/MixedLength.java')
| -rw-r--r-- | src/java/org/apache/fop/fo/properties/MixedLength.java | 150 |
1 files changed, 150 insertions, 0 deletions
diff --git a/src/java/org/apache/fop/fo/properties/MixedLength.java b/src/java/org/apache/fop/fo/properties/MixedLength.java new file mode 100644 index 000000000..971991121 --- /dev/null +++ b/src/java/org/apache/fop/fo/properties/MixedLength.java @@ -0,0 +1,150 @@ +/* + * $Id$ + * ============================================================================ + * The Apache Software License, Version 1.1 + * ============================================================================ + * + * Copyright (C) 1999-2003 The Apache Software Foundation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modifica- + * tion, are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * + * 3. The end-user documentation included with the redistribution, if any, must + * include the following acknowledgment: "This product includes software + * developed by the Apache Software Foundation (http://www.apache.org/)." + * Alternately, this acknowledgment may appear in the software itself, if + * and wherever such third-party acknowledgments normally appear. + * + * 4. The names "FOP" and "Apache Software Foundation" must not be used to + * endorse or promote products derived from this software without prior + * written permission. For written permission, please contact + * apache@apache.org. + * + * 5. Products derived from this software may not be called "Apache", nor may + * "Apache" appear in their name, without prior written permission of the + * Apache Software Foundation. + * + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, + * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND + * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * APACHE SOFTWARE FOUNDATION OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLU- + * DING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON + * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * ============================================================================ + * + * This software consists of voluntary contributions made by many individuals + * on behalf of the Apache Software Foundation and was originally created by + * James Tauber <jtauber@jtauber.com>. For more information on the Apache + * Software Foundation, please see <http://www.apache.org/>. + */ +package org.apache.fop.fo.properties; + +import java.util.Enumeration; +import java.util.Vector; + +import org.apache.fop.fo.expr.NumericProperty; +import org.apache.fop.fo.expr.PropertyException; + +/** + * A length quantity in XSL which is specified with a mixture + * of absolute and relative and/or percent components. + * The actual value may not be computable before layout is done. + */ +public class MixedLength extends LengthProperty { + + /** The collection of Length objects comprising this MixedLength object */ + private Vector lengths ; + + /** + * Constructor + * @param lengths the collection of Length objects which comprise the new + * MixedLength object + */ + public MixedLength(Vector lengths) { + this.lengths = lengths; + } + + /** + * Iterates through each internal component, computing and + * summarizing the values, then setting the value for this + */ + protected void computeValue() { + int computedValue = 0; + boolean bAllComputed = true; + Enumeration e = lengths.elements(); + while (e.hasMoreElements()) { + LengthProperty l = (LengthProperty) e.nextElement(); + computedValue += l.getValue(); + if (!l.isComputed()) { + bAllComputed = false; + } + } + setComputedValue(computedValue, bAllComputed); + } + + + public double getTableUnits() { + double tableUnits = 0.0; + Enumeration e = lengths.elements(); + while (e.hasMoreElements()) { + tableUnits += ((LengthProperty) e.nextElement()).getTableUnits(); + } + return tableUnits; + } + + public void resolveTableUnit(double dTableUnit) { + Enumeration e = lengths.elements(); + while (e.hasMoreElements()) { + ((LengthProperty) e.nextElement()).resolveTableUnit(dTableUnit); + } + } + + /** + * @return String equivalent of this + */ + public String toString() { + StringBuffer sbuf = new StringBuffer(); + Enumeration e = lengths.elements(); + while (e.hasMoreElements()) { + if (sbuf.length() > 0) { + sbuf.append('+'); + } + sbuf.append(e.nextElement().toString()); + } + return sbuf.toString(); + } + + /** + * @return Numeric equivalent of this + */ + public NumericProperty asNumeric() { + NumericProperty numeric = null; + for (Enumeration e = lengths.elements(); e.hasMoreElements();) { + LengthProperty l = (LengthProperty) e.nextElement(); + if (numeric == null) { + numeric = l.asNumeric(); + } else { + try { + NumericProperty sum = numeric.add(l.asNumeric()); + numeric = sum; + } catch (PropertyException pe) { + System.err.println( + "Can't convert MixedLength to Numeric: " + pe); + } + } + } + return numeric; + } +} + |