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16 package org.outerj.daisy.frontend;
17
18 import org.apache.cocoon.transformation.AbstractTransformer;
19 import org.apache.cocoon.environment.SourceResolver;
20 import org.apache.cocoon.environment.Request;
21 import org.apache.cocoon.environment.ObjectModelHelper;
22 import org.apache.cocoon.ProcessingException;
23 import org.apache.cocoon.components.flow.FlowHelper;
24 import org.apache.avalon.framework.parameters.Parameters;
25 import org.apache.commons.jxpath.JXPathContext;
26 import org.xml.sax.SAXException  ;
27 import org.xml.sax.Attributes ;
28 import org.xml.sax.helpers.AttributesImpl ;
29 import org.outerj.daisy.frontend.components.siteconf.SiteConf;
30 import org.outerj.daisy.frontend.util.DaisyLinkUtil;
31 import org.outerj.daisy.util.Constants;
32 import org.outerj.daisy.repository.VariantKey;
33
34 import java.util.Map ;
35 import java.util.regex.Matcher ;
36 import java.io.IOException ;
37
38 public class DaisyLinkTransformer extends AbstractTransformer {
39 private String mountPoint;
40 private SiteConf siteConf;
41 private VariantKey documentKey;
42
43 private static final String LT_NAMESPACE = "http://outerx.org/daisy/1.0#linktransformer";
44 private static final String PUBLISHER_NAMESPACE = "http://outerx.org/daisy/1.0#publisher";
45
46 public void setup(SourceResolver sourceResolver, Map objectModel, String s, Parameters parameters) throws ProcessingException, SAXException , IOException {
47 Request request = ObjectModelHelper.getRequest(objectModel);
48 siteConf = WikiHelper.getSiteConf(request);
49 mountPoint = WikiHelper.getMountPoint(request);
50
51 Object flowContext = FlowHelper.getContextObject(objectModel);
52 JXPathContext jxpc = JXPathContext.newContext(flowContext);
53 documentKey = (VariantKey)jxpc.getValue("/documentKey");
54 if (documentKey == null)
55 throw new ProcessingException("Unexpected error in DaisyLinkTransformer: documentKey is missing in flow context.");
56 }
57
58 public void recycle() {
59 super.recycle();
60 this.documentKey = null;
61 }
62
63 public void startElement(String namespaceURI, String localName, String qName, Attributes attributes) throws SAXException {
64 if (namespaceURI.equals(Constants.DAISY_NAMESPACE) && localName.equals("link")) {
65 attributes = translateLink(attributes, "target");
66 } else if (localName.equals("a") && namespaceURI.equals("")) {
67 attributes = translateLink(attributes, "href");
68 } else if (localName.equals("img") && namespaceURI.equals("")) {
69 attributes = translateLink(attributes, "src");
70 } else if (localName.equals("span") && namespaceURI.equals("") && "crossreference".equals(attributes.getValue("class"))) {
71 attributes = translateLink(attributes, "crossRefTarget");
73 }
74
75 super.startElement(namespaceURI, localName, qName, attributes);
76 }
77
78 Attributes translateLink(Attributes attributes, String linkAttrName) {
79 String href = attributes.getValue(linkAttrName);
80 if (href != null) {
81 Matcher matcher = Constants.DAISY_LINK_PATTERN.matcher(href);
82 if (matcher.matches()) {
83 String navigationPath = attributes.getValue(PUBLISHER_NAMESPACE, "navigationPath");
84
85 String documentId = matcher.group(1);
86 String version = matcher.group(7);
87
88 String partLink = attributes.getValue(LT_NAMESPACE, "partLink");
89 String fileName = attributes.getValue(LT_NAMESPACE, "fileName");
90 fileName = fileName != null && fileName.length() != 0 ? "/" + fileName : "";
91
92 StringBuffer path = new StringBuffer (300);
93 path.append(mountPoint).append('/').append(siteConf.getName());
94 if (navigationPath != null)
95 path.append(navigationPath);
96 else
97 path.append('/').append(documentId);
98
99 if (partLink != null) {
100 if (version == null)
101 version = "default";
102 path.append("/version/").append(version).append("/part/").append(partLink).append("/data").append(fileName);
103 } else if (version != null) {
104 path.append("/version/").append(version);
105 } else {
106 path.append(".html");
107 }
108
109 path.append(DaisyLinkUtil.getBranchLangQueryString(matcher, siteConf, documentKey.getBranchId(), documentKey.getLanguageId()));
110
111 String fragmentIdentifier = matcher.group(8);
112 if (fragmentIdentifier != null && !fragmentIdentifier.startsWith("#dsy")) {
113 fragmentIdentifier = "#dsy" + documentId + "_" + fragmentIdentifier.substring(1);
114 path.append(fragmentIdentifier);
115 }
116
117 AttributesImpl newAttributes = copyAttributesExceptHrefAndOwn(attributes, linkAttrName);
118 newAttributes.addAttribute("", linkAttrName, linkAttrName, "CDATA", path.toString());
119 attributes = newAttributes;
120 } else if (href.startsWith("#") && !href.startsWith("#dsy")) {
121 String newHref = "#dsy" + documentKey.getDocumentId() + "_" + href.substring(1);
122 AttributesImpl newAttributes = new AttributesImpl (attributes);
123 newAttributes.setAttribute(newAttributes.getIndex("", linkAttrName), "", linkAttrName, linkAttrName, "CDATA", newHref);
124 attributes = newAttributes;
125 }
126 }
127 return attributes;
128 }
129
130 private AttributesImpl copyAttributesExceptHrefAndOwn(Attributes attrs, String linkAttrName) {
131 AttributesImpl newAttrs = new AttributesImpl ();
132 for (int i = 0; i < attrs.getLength(); i++) {
133 if (!attrs.getURI(i).equals(LT_NAMESPACE) && !attrs.getURI(i).equals(PUBLISHER_NAMESPACE)
134 && !(attrs.getLocalName(i).equals(linkAttrName) && attrs.getURI(i).equals(""))) {
135 newAttrs.addAttribute(attrs.getURI(i), attrs.getLocalName(i), attrs.getQName(i), attrs.getType(i), attrs.getValue(i));
136 }
137 }
138 return newAttrs;
139 }
140
141 }
142 |
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