Helper class for debugging in TextPainters

git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/trunk@196987 13f79535-47bb-0310-9956-ffa450edef68

diff --git a/src/java/org/apache/fop/svg/ACIUtils.java b/src/java/org/apache/fop/svg/ACIUtils.java
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+/*
+ * $Id$
+ * ============================================================================
+ *                    The Apache Software License, Version 1.1
+ * ============================================================================
+ *
+ * Copyright (C) 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.svg;
+
+import java.text.AttributedCharacterIterator;
+import java.text.CharacterIterator;
+import java.util.Iterator;
+import java.util.Map;
+
+/**
+ * Utilities for java.text.AttributedCharacterIterator.
+ */
+public final class ACIUtils {
+
+    private ACIUtils() {
+        //This class shouldn't be instantiated.
+    }
+
+    /**
+     * Dumps the contents of an ACI to System.out. Used for debugging only.
+     * @param aci the ACI to dump
+     */
+    public static void dumpAttrs(AttributedCharacterIterator aci) {
+        aci.first();
+        Iterator i = aci.getAttributes().entrySet().iterator();
+        while (i.hasNext()) {
+            Map.Entry entry = (Map.Entry)i.next();
+            if (entry.getValue() != null) {
+                System.out.println(entry.getKey() + ": " + entry.getValue());
+            } 
+        }
+        int start = aci.getBeginIndex();
+        System.out.print("AttrRuns: ");
+        while (aci.current() != CharacterIterator.DONE) {
+            int end = aci.getRunLimit();
+            System.out.print("" + (end - start) + ", ");
+            aci.setIndex(end);
+            if (start == end) {
+                break;
+            } 
+            start = end;
+        }
+        System.out.println("");
+    }
+
+}