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+/*
+ * Copyright 2005 The Apache Software Foundation.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+
+/* $Id$ */
+
+package org.apache.fop.layoutengine;
+
+import java.util.Iterator;
+import java.util.List;
+
+import org.apache.fop.layoutmgr.KnuthBox;
+import org.apache.fop.layoutmgr.KnuthElement;
+import org.apache.fop.layoutmgr.KnuthGlue;
+import org.apache.fop.layoutmgr.KnuthPenalty;
+import org.w3c.dom.CDATASection;
+import org.w3c.dom.Element;
+import org.w3c.dom.Node;
+import org.w3c.dom.NodeList;
+import org.w3c.dom.Text;
+
+/**
+ * Check implementation that checks a Knuth element list.
+ */
+public class ElementListCheck implements LayoutEngineCheck {
+
+ private String category;
+ private String id;
+ private int index = -1;
+ private Element checkElement;
+
+ /**
+ * Creates a new instance from a DOM node.
+ * @param node DOM node that defines this check
+ */
+ public ElementListCheck(Node node) {
+ this.category = node.getAttributes().getNamedItem("category").getNodeValue();
+ if (node.getAttributes().getNamedItem("id") != null) {
+ this.id = node.getAttributes().getNamedItem("id").getNodeValue();
+ }
+ if (!haveID()) {
+ if (node.getAttributes().getNamedItem("index") != null) {
+ String s = node.getAttributes().getNamedItem("index").getNodeValue();
+ this.index = Integer.parseInt(s);
+ }
+ }
+ this.checkElement = (Element)node;
+ }
+
+ /**
+ * @see org.apache.fop.layoutengine.LayoutEngineCheck
+ */
+ public void check(LayoutResult result) {
+ ElementListCollector.ElementList elementList = findElementList(result);
+ NodeList children = checkElement.getChildNodes();
+ int pos = -1;
+ for (int i = 0; i < children.getLength(); i++) {
+ Node node = children.item(i);
+ if (node instanceof Element) {
+ pos++;
+ Element domEl = (Element)node;
+ KnuthElement knuthEl = (KnuthElement)elementList.getElementList().get(pos);
+ if ("skip".equals(domEl.getLocalName())) {
+ pos += Integer.parseInt(getElementText(domEl)) - 1;
+ } else if ("box".equals(domEl.getLocalName())) {
+ if (!(knuthEl instanceof KnuthBox)) {
+ fail("Expected KnuthBox"
+ + " at position " + pos
+ + " but got: " + knuthEl.getClass().getName());
+ }
+ if (domEl.getAttribute("w").length() > 0) {
+ int w = Integer.parseInt(domEl.getAttribute("w"));
+ if (w != knuthEl.getW()) {
+ fail("Expected w=" + w
+ + " at position " + pos
+ + " but got: " + knuthEl.getW());
+ }
+ }
+ } else if ("penalty".equals(domEl.getLocalName())) {
+ if (!(knuthEl instanceof KnuthPenalty)) {
+ fail("Expected KnuthPenalty "
+ + " at position " + pos
+ + " but got: " + knuthEl.getClass().getName());
+ }
+ KnuthPenalty pen = (KnuthPenalty)knuthEl;
+ if (domEl.getAttribute("w").length() > 0) {
+ int w = Integer.parseInt(domEl.getAttribute("w"));
+ if (w != knuthEl.getW()) {
+ fail("Expected w=" + w
+ + " at position " + pos
+ + " but got: " + knuthEl.getW());
+ }
+ }
+ if (domEl.getAttribute("p").length() > 0) {
+ int p;
+ if ("INF".equalsIgnoreCase(domEl.getAttribute("p"))) {
+ p = KnuthPenalty.INFINITE;
+ } else if ("INFINITE".equalsIgnoreCase(domEl.getAttribute("p"))) {
+ p = KnuthPenalty.INFINITE;
+ } else if ("-INF".equalsIgnoreCase(domEl.getAttribute("p"))) {
+ p = -KnuthPenalty.INFINITE;
+ } else if ("-INFINITE".equalsIgnoreCase(domEl.getAttribute("p"))) {
+ p = -KnuthPenalty.INFINITE;
+ } else {
+ p = Integer.parseInt(domEl.getAttribute("p"));
+ }
+ if (p != knuthEl.getP()) {
+ fail("Expected p=" + p
+ + " at position " + pos
+ + " but got: " + knuthEl.getP());
+ }
+ }
+ if ("true".equals(domEl.getAttribute("flagged"))) {
+ if (!pen.isFlagged()) {
+ fail("Expected flagged penalty"
+ + " at position " + pos);
+ }
+ } else if ("false".equals(domEl.getAttribute("flagged"))) {
+ if (pen.isFlagged()) {
+ fail("Expected non-flagged penalty"
+ + " at position " + pos);
+ }
+ }
+ if ("true".equals(domEl.getAttribute("aux"))) {
+ if (!pen.isAuxiliary()) {
+ fail("Expected auxiliary penalty"
+ + " at position " + pos);
+ }
+ } else if ("false".equals(domEl.getAttribute("aux"))) {
+ if (pen.isAuxiliary()) {
+ fail("Expected non-auxiliary penalty"
+ + " at position " + pos);
+ }
+ }
+ } else if ("glue".equals(domEl.getLocalName())) {
+ if (!(knuthEl instanceof KnuthGlue)) {
+ fail("Expected KnuthGlue"
+ + " at position " + pos
+ + " but got: " + knuthEl.getClass().getName());
+ }
+ KnuthGlue glue = (KnuthGlue)knuthEl;
+ if (domEl.getAttribute("w").length() > 0) {
+ int w = Integer.parseInt(domEl.getAttribute("w"));
+ if (w != knuthEl.getW()) {
+ fail("Expected w=" + w
+ + " at position " + pos
+ + " but got: " + knuthEl.getW());
+ }
+ }
+ //TODO Check stretch and shrink
+ } else {
+ throw new IllegalArgumentException("Invalid child node for 'element-list': "
+ + domEl.getLocalName()
+ + " at position " + pos + " (" + this + ")");
+ }
+
+ }
+ }
+ pos++;
+ if (elementList.getElementList().size() > pos) {
+ fail("There are "
+ + (elementList.getElementList().size() - pos)
+ + " unchecked elements at the end of the list");
+ }
+ }
+
+ private void fail(String msg) {
+ throw new RuntimeException(msg + " (" + this + ")");
+ }
+
+ private boolean haveID() {
+ return (this.id != null && this.id.length() > 0);
+ }
+
+ private ElementListCollector.ElementList findElementList(LayoutResult result) {
+ List candidates = new java.util.ArrayList();
+ Iterator iter = result.getElementListCollector().getElementLists().iterator();
+ while (iter.hasNext()) {
+ ElementListCollector.ElementList el = (ElementListCollector.ElementList)iter.next();
+ if (el.getCategory().equals(category)) {
+ if (haveID() && this.id.equals(el.getID())) {
+ candidates.add(el);
+ break;
+ } else if (!haveID()) {
+ candidates.add(el);
+ }
+ }
+ }
+ if (candidates.size() == 0) {
+ throw new ArrayIndexOutOfBoundsException("Requested element list not found");
+ } else if (index >= 0) {
+ return (ElementListCollector.ElementList)candidates.get(index);
+ } else {
+ return (ElementListCollector.ElementList)candidates.get(0);
+ }
+ }
+
+ private static String getElementText(Element el) {
+ StringBuffer sb = new StringBuffer();
+ NodeList children = el.getChildNodes();
+ for (int i = 0; i < children.getLength(); i++) {
+ Node node = children.item(i);
+ if (node instanceof Text) {
+ sb.append(((Text)node).getData());
+ } else if (node instanceof CDATASection) {
+ sb.append(((CDATASection)node).getData());
+ }
+ }
+ return sb.toString();
+ }
+
+ /** @see java.lang.Object#toString() */
+ public String toString() {
+ StringBuffer sb = new StringBuffer("element-list");
+ sb.append(" category=").append(category);
+ if (haveID()) {
+ sb.append(" id=").append(id);
+ } else if (index >= 0) {
+ sb.append(" index=").append(index);
+ }
+ return sb.toString();
+ }
+}