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1   package org.apache.maven.doxia.siterenderer;
2   
3   /*
4    * Licensed to the Apache Software Foundation (ASF) under one
5    * or more contributor license agreements.  See the NOTICE file
6    * distributed with this work for additional information
7    * regarding copyright ownership.  The ASF licenses this file
8    * to you under the Apache License, Version 2.0 (the
9    * "License"); you may not use this file except in compliance
10   * with the License.  You may obtain a copy of the License at
11   *
12   *   http://www.apache.org/licenses/LICENSE-2.0
13   *
14   * Unless required by applicable law or agreed to in writing,
15   * software distributed under the License is distributed on an
16   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17   * KIND, either express or implied.  See the License for the
18   * specific language governing permissions and limitations
19   * under the License.
20   */
21  
22  import java.io.BufferedReader;
23  import java.io.File;
24  import java.io.FileNotFoundException;
25  import java.io.FileOutputStream;
26  import java.io.IOException;
27  import java.io.InputStream;
28  import java.io.LineNumberReader;
29  import java.io.OutputStream;
30  import java.io.Reader;
31  import java.io.StringReader;
32  import java.io.StringWriter;
33  import java.io.UnsupportedEncodingException;
34  import java.io.Writer;
35  import java.net.MalformedURLException;
36  import java.net.URL;
37  import java.net.URLClassLoader;
38  import java.text.DateFormat;
39  import java.text.SimpleDateFormat;
40  import java.util.Arrays;
41  import java.util.Collection;
42  import java.util.Collections;
43  import java.util.Date;
44  import java.util.Enumeration;
45  import java.util.Iterator;
46  import java.util.LinkedHashMap;
47  import java.util.LinkedList;
48  import java.util.List;
49  import java.util.Locale;
50  import java.util.Map;
51  import java.util.Properties;
52  import java.util.zip.ZipEntry;
53  import java.util.zip.ZipException;
54  import java.util.zip.ZipFile;
55  
56  import org.apache.commons.lang3.ArrayUtils;
57  import org.apache.commons.lang3.SystemUtils;
58  import org.apache.maven.artifact.Artifact;
59  import org.apache.maven.artifact.versioning.ArtifactVersion;
60  import org.apache.maven.artifact.versioning.DefaultArtifactVersion;
61  import org.apache.maven.artifact.versioning.InvalidVersionSpecificationException;
62  import org.apache.maven.artifact.versioning.Restriction;
63  import org.apache.maven.artifact.versioning.VersionRange;
64  import org.apache.maven.doxia.Doxia;
65  import org.apache.maven.doxia.logging.PlexusLoggerWrapper;
66  import org.apache.maven.doxia.parser.ParseException;
67  import org.apache.maven.doxia.parser.Parser;
68  import org.apache.maven.doxia.parser.manager.ParserNotFoundException;
69  import org.apache.maven.doxia.site.decoration.DecorationModel;
70  import org.apache.maven.doxia.site.decoration.PublishDate;
71  import org.apache.maven.doxia.site.skin.SkinModel;
72  import org.apache.maven.doxia.site.skin.io.xpp3.SkinXpp3Reader;
73  import org.apache.maven.doxia.parser.module.ParserModule;
74  import org.apache.maven.doxia.parser.module.ParserModuleManager;
75  import org.apache.maven.doxia.parser.module.ParserModuleNotFoundException;
76  import org.apache.maven.doxia.siterenderer.sink.SiteRendererSink;
77  import org.apache.maven.doxia.util.XmlValidator;
78  import org.apache.velocity.Template;
79  import org.apache.velocity.context.Context;
80  import org.apache.velocity.exception.ParseErrorException;
81  import org.apache.velocity.exception.ResourceNotFoundException;
82  import org.apache.velocity.exception.VelocityException;
83  import org.apache.velocity.tools.Scope;
84  import org.apache.velocity.tools.ToolManager;
85  import org.apache.velocity.tools.config.ConfigurationUtils;
86  import org.apache.velocity.tools.config.EasyFactoryConfiguration;
87  import org.apache.velocity.tools.config.FactoryConfiguration;
88  import org.apache.velocity.tools.generic.AlternatorTool;
89  import org.apache.velocity.tools.generic.ClassTool;
90  import org.apache.velocity.tools.generic.ComparisonDateTool;
91  import org.apache.velocity.tools.generic.ContextTool;
92  import org.apache.velocity.tools.generic.ConversionTool;
93  import org.apache.velocity.tools.generic.DisplayTool;
94  import org.apache.velocity.tools.generic.EscapeTool;
95  import org.apache.velocity.tools.generic.FieldTool;
96  import org.apache.velocity.tools.generic.LinkTool;
97  import org.apache.velocity.tools.generic.LoopTool;
98  import org.apache.velocity.tools.generic.MathTool;
99  import org.apache.velocity.tools.generic.NumberTool;
100 import org.apache.velocity.tools.generic.RenderTool;
101 import org.apache.velocity.tools.generic.ResourceTool;
102 import org.apache.velocity.tools.generic.SortTool;
103 import org.apache.velocity.tools.generic.XmlTool;
104 import org.codehaus.plexus.PlexusContainer;
105 import org.codehaus.plexus.component.annotations.Component;
106 import org.codehaus.plexus.component.annotations.Requirement;
107 import org.codehaus.plexus.i18n.I18N;
108 import org.codehaus.plexus.logging.AbstractLogEnabled;
109 import org.codehaus.plexus.util.DirectoryScanner;
110 import org.codehaus.plexus.util.FileUtils;
111 import org.codehaus.plexus.util.IOUtil;
112 import org.codehaus.plexus.util.Os;
113 import org.codehaus.plexus.util.PathTool;
114 import org.codehaus.plexus.util.PropertyUtils;
115 import org.codehaus.plexus.util.ReaderFactory;
116 import org.codehaus.plexus.util.StringUtils;
117 import org.codehaus.plexus.util.WriterFactory;
118 import org.codehaus.plexus.util.xml.pull.XmlPullParserException;
119 import org.codehaus.plexus.velocity.VelocityComponent;
120 
121 /**
122  * <p>DefaultSiteRenderer class.</p>
123  *
124  * @author <a href="mailto:evenisse@codehaus.org">Emmanuel Venisse</a>
125  * @author <a href="mailto:vincent.siveton@gmail.com">Vincent Siveton</a>
126  * @since 1.0
127  */
128 @Component( role = Renderer.class )
129 public class DefaultSiteRenderer
130     extends AbstractLogEnabled
131     implements Renderer
132 {
133     // ----------------------------------------------------------------------
134     // Requirements
135     // ----------------------------------------------------------------------
136 
137     @Requirement
138     private VelocityComponent velocity;
139 
140     @Requirement
141     private ParserModuleManager parserModuleManager;
142 
143     @Requirement
144     private Doxia doxia;
145 
146     @Requirement
147     private I18N i18n;
148 
149     @Requirement
150     private PlexusContainer plexus;
151 
152     private static final String RESOURCE_DIR = "org/apache/maven/doxia/siterenderer/resources";
153 
154     private static final String DEFAULT_TEMPLATE = RESOURCE_DIR + "/default-site.vm";
155 
156     private static final String SKIN_TEMPLATE_LOCATION = "META-INF/maven/site.vm";
157 
158     private static final String TOOLS_LOCATION = "META-INF/maven/site-tools.xml";
159 
160     // ----------------------------------------------------------------------
161     // Renderer implementation
162     // ----------------------------------------------------------------------
163 
164     /** {@inheritDoc} */
165     public Map<String, DocumentRenderer> locateDocumentFiles( SiteRenderingContext siteRenderingContext )
166             throws IOException, RendererException
167     {
168         return locateDocumentFiles( siteRenderingContext, false );
169     }
170 
171     /** {@inheritDoc} */
172     public Map<String, DocumentRenderer> locateDocumentFiles( SiteRenderingContext siteRenderingContext,
173                                                               boolean editable )
174         throws IOException, RendererException
175     {
176         Map<String, DocumentRenderer> files = new LinkedHashMap<String, DocumentRenderer>();
177         Map<String, String> moduleExcludes = siteRenderingContext.getModuleExcludes();
178 
179         // look in every site directory (in general src/site or target/generated-site)
180         for ( File siteDirectory : siteRenderingContext.getSiteDirectories() )
181         {
182             if ( siteDirectory.exists() )
183             {
184                 Collection<ParserModule> modules = parserModuleManager.getParserModules();
185                 // use every Doxia parser module
186                 for ( ParserModule module : modules )
187                 {
188                     File moduleBasedir = new File( siteDirectory, module.getSourceDirectory() );
189 
190                     String excludes = ( moduleExcludes == null ) ? null : moduleExcludes.get( module.getParserId() );
191 
192                     addModuleFiles( siteRenderingContext.getRootDirectory(), moduleBasedir, module, excludes, files,
193                                     editable );
194                 }
195             }
196         }
197 
198         // look in specific modules directories (used for old Maven 1.x site layout: xdoc and fml docs in /xdocs)
199         for ( ExtraDoxiaModuleReference module : siteRenderingContext.getModules() )
200         {
201             try
202             {
203                 ParserModule parserModule = parserModuleManager.getParserModule( module.getParserId() );
204 
205                 String excludes = ( moduleExcludes == null ) ? null : moduleExcludes.get( module.getParserId() );
206 
207                 addModuleFiles( siteRenderingContext.getRootDirectory(), module.getBasedir(), parserModule, excludes,
208                                 files, editable );
209             }
210             catch ( ParserModuleNotFoundException e )
211             {
212                 throw new RendererException( "Unable to find module: " + e.getMessage(), e );
213             }
214         }
215         return files;
216     }
217 
218     private List<String> filterExtensionIgnoreCase( List<String> fileNames, String extension )
219     {
220         List<String> filtered = new LinkedList<String>( fileNames );
221         for ( Iterator<String> it = filtered.iterator(); it.hasNext(); )
222         {
223             String name = it.next();
224 
225             // Take care of extension case
226             if ( !endsWithIgnoreCase( name, extension ) )
227             {
228                 it.remove();
229             }
230         }
231         return filtered;
232     }
233 
234     private void addModuleFiles( File rootDir, File moduleBasedir, ParserModule module, String excludes,
235                                  Map<String, DocumentRenderer> files, boolean editable )
236             throws IOException, RendererException
237     {
238         if ( !moduleBasedir.exists() || ArrayUtils.isEmpty( module.getExtensions() ) )
239         {
240             return;
241         }
242 
243         String moduleRelativePath =
244             PathTool.getRelativeFilePath( rootDir.getAbsolutePath(), moduleBasedir.getAbsolutePath() );
245 
246         List<String> allFiles = FileUtils.getFileNames( moduleBasedir, "**/*.*", excludes, false );
247 
248         for ( String extension : module.getExtensions() )
249         {
250             String fullExtension = "." + extension;
251 
252             List<String> docs = filterExtensionIgnoreCase( allFiles, fullExtension );
253 
254             // *.<extension>.vm
255             List<String> velocityFiles = filterExtensionIgnoreCase( allFiles, fullExtension + ".vm" );
256 
257             docs.addAll( velocityFiles );
258 
259             for ( String doc : docs )
260             {
261                 RenderingContext context = new RenderingContext( moduleBasedir, moduleRelativePath, doc,
262                                                                  module.getParserId(), extension, editable );
263 
264                 // TODO: DOXIA-111: we need a general filter here that knows how to alter the context
265                 if ( endsWithIgnoreCase( doc, ".vm" ) )
266                 {
267                     context.setAttribute( "velocity", "true" );
268                 }
269 
270                 String key = context.getOutputName();
271                 key = StringUtils.replace( key, "\\", "/" );
272 
273                 if ( files.containsKey( key ) )
274                 {
275                     DocumentRenderer renderer = files.get( key );
276 
277                     RenderingContext originalContext = renderer.getRenderingContext();
278 
279                     File originalDoc = new File( originalContext.getBasedir(), originalContext.getInputName() );
280 
281                     throw new RendererException( "File '" + module.getSourceDirectory() + File.separator + doc
282                         + "' clashes with existing '" + originalDoc + "'." );
283                 }
284                 // -----------------------------------------------------------------------
285                 // Handle key without case differences
286                 // -----------------------------------------------------------------------
287                 for ( Map.Entry<String, DocumentRenderer> entry : files.entrySet() )
288                 {
289                     if ( entry.getKey().equalsIgnoreCase( key ) )
290                     {
291                         RenderingContext originalContext = entry.getValue().getRenderingContext();
292 
293                         File originalDoc = new File( originalContext.getBasedir(), originalContext.getInputName() );
294 
295                         if ( Os.isFamily( Os.FAMILY_WINDOWS ) )
296                         {
297                             throw new RendererException( "File '" + module.getSourceDirectory() + File.separator
298                                 + doc + "' clashes with existing '" + originalDoc + "'." );
299                         }
300 
301                         if ( getLogger().isWarnEnabled() )
302                         {
303                             getLogger().warn( "File '" + module.getSourceDirectory() + File.separator + doc
304                                 + "' could clash with existing '" + originalDoc + "'." );
305                         }
306                     }
307                 }
308 
309                 files.put( key, new DoxiaDocumentRenderer( context ) );
310             }
311         }
312     }
313 
314     /** {@inheritDoc} */
315     public void render( Collection<DocumentRenderer> documents, SiteRenderingContext siteRenderingContext,
316                         File outputDirectory )
317         throws RendererException, IOException
318     {
319         for ( DocumentRenderer docRenderer : documents )
320         {
321             RenderingContext renderingContext = docRenderer.getRenderingContext();
322 
323             File outputFile = new File( outputDirectory, docRenderer.getOutputName() );
324 
325             File inputFile = new File( renderingContext.getBasedir(), renderingContext.getInputName() );
326 
327             boolean modified = !outputFile.exists() || ( inputFile.lastModified() > outputFile.lastModified() )
328                 || ( siteRenderingContext.getDecoration().getLastModified() > outputFile.lastModified() );
329 
330             if ( modified || docRenderer.isOverwrite() )
331             {
332                 if ( !outputFile.getParentFile().exists() )
333                 {
334                     outputFile.getParentFile().mkdirs();
335                 }
336 
337                 if ( getLogger().isDebugEnabled() )
338                 {
339                     getLogger().debug( "Generating " + outputFile );
340                 }
341 
342                 Writer writer = null;
343                 try
344                 {
345                     if ( !docRenderer.isExternalReport() )
346                     {
347                         writer = WriterFactory.newWriter( outputFile, siteRenderingContext.getOutputEncoding() );
348                     }
349                     docRenderer.renderDocument( writer, this, siteRenderingContext );
350                 }
351                 finally
352                 {
353                     IOUtil.close( writer );
354                 }
355             }
356             else
357             {
358                 if ( getLogger().isDebugEnabled() )
359                 {
360                     getLogger().debug( inputFile + " unchanged, not regenerating..." );
361                 }
362             }
363         }
364     }
365 
366     /** {@inheritDoc} */
367     public void renderDocument( Writer writer, RenderingContext docRenderingContext, SiteRenderingContext siteContext )
368             throws RendererException, FileNotFoundException, UnsupportedEncodingException
369     {
370         SiteRendererSink sink = new SiteRendererSink( docRenderingContext );
371 
372         File doc = new File( docRenderingContext.getBasedir(), docRenderingContext.getInputName() );
373 
374         Reader reader = null;
375         try
376         {
377             String resource = doc.getAbsolutePath();
378 
379             Parser parser = doxia.getParser( docRenderingContext.getParserId() );
380             // DOXIASITETOOLS-146 don't render comments from source markup
381             parser.setEmitComments( false );
382 
383             // TODO: DOXIA-111: the filter used here must be checked generally.
384             if ( docRenderingContext.getAttribute( "velocity" ) != null )
385             {
386                 getLogger().debug( "Processing Velocity for " + docRenderingContext.getDoxiaSourcePath() );
387                 try
388                 {
389                     Context vc = createDocumentVelocityContext( docRenderingContext, siteContext );
390 
391                     StringWriter sw = new StringWriter();
392 
393                     velocity.getEngine().mergeTemplate( resource, siteContext.getInputEncoding(), vc, sw );
394 
395                     String doxiaContent = sw.toString();
396 
397                     if ( siteContext.getProcessedContentOutput() != null )
398                     {
399                         // save Velocity processing result, ie the Doxia content that will be parsed after
400                         saveVelocityProcessedContent( docRenderingContext, siteContext, doxiaContent );
401                     }
402 
403                     reader = new StringReader( doxiaContent );
404                 }
405                 catch ( VelocityException e )
406                 {
407                     throw new RendererException( "Error parsing " + docRenderingContext.getDoxiaSourcePath()
408                         + " as a Velocity template: " + e.getMessage(), e );
409                 }
410 
411                 if ( parser.getType() == Parser.XML_TYPE && siteContext.isValidate() )
412                 {
413                     reader = validate( reader, resource );
414                 }
415             }
416             else
417             {
418                 switch ( parser.getType() )
419                 {
420                     case Parser.XML_TYPE:
421                         reader = ReaderFactory.newXmlReader( doc );
422                         if ( siteContext.isValidate() )
423                         {
424                             reader = validate( reader, resource );
425                         }
426                         break;
427 
428                     case Parser.TXT_TYPE:
429                     case Parser.UNKNOWN_TYPE:
430                     default:
431                         reader = ReaderFactory.newReader( doc, siteContext.getInputEncoding() );
432                 }
433             }
434             sink.enableLogging( new PlexusLoggerWrapper( getLogger() ) );
435 
436             doxia.parse( reader, docRenderingContext.getParserId(), sink );
437         }
438         catch ( ParserNotFoundException e )
439         {
440             throw new RendererException( "Error getting a parser for '" + doc + "': " + e.getMessage(), e );
441         }
442         catch ( ParseException e )
443         {
444             throw new RendererException( "Error parsing '"
445                     + doc + "': line [" + e.getLineNumber() + "] " + e.getMessage(), e );
446         }
447         catch ( IOException e )
448         {
449             throw new RendererException( "IOException when processing '" + doc + "'", e );
450         }
451         finally
452         {
453             sink.flush();
454 
455             sink.close();
456 
457             IOUtil.close( reader );
458         }
459 
460         mergeDocumentIntoSite( writer, (DocumentContent) sink, siteContext );
461     }
462 
463     private void saveVelocityProcessedContent( RenderingContext docRenderingContext, SiteRenderingContext siteContext,
464                                                String doxiaContent )
465         throws IOException
466     {
467         if ( !siteContext.getProcessedContentOutput().exists() )
468         {
469             siteContext.getProcessedContentOutput().mkdirs();
470         }
471 
472         String input = docRenderingContext.getInputName();
473         File outputFile = new File( siteContext.getProcessedContentOutput(),
474                                     input.substring( 0, input.length() - 3 ) );
475 
476         File outputParent = outputFile.getParentFile();
477         if ( !outputParent.exists() )
478         {
479             outputParent.mkdirs();
480         }
481 
482         FileUtils.fileWrite( outputFile, siteContext.getInputEncoding(), doxiaContent );
483     }
484 
485     /**
486      * Creates a Velocity Context with all generic tools configured wit the site rendering context.
487      *
488      * @param siteRenderingContext the site rendering context
489      * @return a Velocity tools managed context
490      */
491     protected Context createToolManagedVelocityContext( SiteRenderingContext siteRenderingContext )
492     {
493         Locale locale = siteRenderingContext.getLocale();
494         String dateFormat = siteRenderingContext.getDecoration().getPublishDate().getFormat();
495 
496         EasyFactoryConfiguration config = new EasyFactoryConfiguration( false );
497         config.property( "safeMode", Boolean.FALSE );
498         config.toolbox( Scope.REQUEST )
499             .tool( ContextTool.class )
500             .tool( LinkTool.class )
501             .tool( LoopTool.class )
502             .tool( RenderTool.class );
503         config.toolbox( Scope.APPLICATION ).property( "locale", locale )
504             .tool( AlternatorTool.class )
505             .tool( ClassTool.class )
506             .tool( ComparisonDateTool.class ).property( "format", dateFormat )
507             .tool( ConversionTool.class ).property( "dateFormat", dateFormat )
508             .tool( DisplayTool.class )
509             .tool( EscapeTool.class )
510             .tool( FieldTool.class )
511             .tool( MathTool.class )
512             .tool( NumberTool.class )
513             .tool( ResourceTool.class ).property( "bundles", new String[] { "site-renderer" } )
514             .tool( SortTool.class )
515             .tool( XmlTool.class );
516 
517         FactoryConfiguration customConfig = ConfigurationUtils.findInClasspath( TOOLS_LOCATION );
518 
519         if ( customConfig != null )
520         {
521             config.addConfiguration( customConfig );
522         }
523 
524         ToolManager manager = new ToolManager( false, false );
525         manager.configure( config );
526 
527         return manager.createContext();
528     }
529 
530     /**
531      * Create a Velocity Context for a Doxia document, containing every information about rendered document.
532      *
533      * @param sink the site renderer sink for the document
534      * @param siteRenderingContext the site rendering context
535      * @return
536      */
537     protected Context createDocumentVelocityContext( RenderingContext renderingContext,
538                                                      SiteRenderingContext siteRenderingContext )
539     {
540         Context context = createToolManagedVelocityContext( siteRenderingContext );
541         // ----------------------------------------------------------------------
542         // Data objects
543         // ----------------------------------------------------------------------
544 
545         context.put( "relativePath", renderingContext.getRelativePath() );
546 
547         String currentFileName = renderingContext.getOutputName().replace( '\\', '/' );
548         context.put( "currentFileName", currentFileName );
549 
550         context.put( "alignedFileName", PathTool.calculateLink( currentFileName, renderingContext.getRelativePath() ) );
551 
552         context.put( "decoration", siteRenderingContext.getDecoration() );
553 
554         Locale locale = siteRenderingContext.getLocale();
555         context.put( "locale", locale );
556         context.put( "supportedLocales", Collections.unmodifiableList( siteRenderingContext.getSiteLocales() ) );
557 
558         context.put( "currentDate", new Date() );
559         SimpleDateFormat sdf = new SimpleDateFormat( "yyyyMMdd" );
560         context.put( "dateRevision", sdf.format( new Date() ) );
561 
562         context.put( "publishDate", siteRenderingContext.getPublishDate() );
563 
564         PublishDate publishDate = siteRenderingContext.getDecoration().getPublishDate();
565         DateFormat dateFormat = new SimpleDateFormat( publishDate.getFormat(), locale );
566         context.put( "dateFormat", dateFormat );
567 
568         // doxiaSiteRendererVersion
569         InputStream inputStream = this.getClass().getResourceAsStream( "/META-INF/"
570             + "maven/org.apache.maven.doxia/doxia-site-renderer/pom.properties" );
571         Properties properties = PropertyUtils.loadProperties( inputStream );
572         if ( inputStream == null )
573         {
574             getLogger().debug( "pom.properties for doxia-site-renderer could not be found." );
575         }
576         else if ( properties == null )
577         {
578             getLogger().debug( "Failed to load pom.properties, so doxiaVersion is not available"
579                 + " in the Velocity context." );
580         }
581         else
582         {
583             context.put( "doxiaSiteRendererVersion", properties.getProperty( "version" ) );
584         }
585 
586         // Add user properties
587         Map<String, ?> templateProperties = siteRenderingContext.getTemplateProperties();
588 
589         if ( templateProperties != null )
590         {
591             for ( Map.Entry<String, ?> entry : templateProperties.entrySet() )
592             {
593                 context.put( entry.getKey(), entry.getValue() );
594             }
595         }
596 
597         // ----------------------------------------------------------------------
598         // Tools
599         // ----------------------------------------------------------------------
600 
601         context.put( "PathTool", new PathTool() );
602 
603         context.put( "FileUtils", new FileUtils() );
604 
605         context.put( "StringUtils", new StringUtils() );
606 
607         context.put( "i18n", i18n );
608 
609         context.put( "plexus", plexus );
610         return context;
611     }
612 
613     /**
614      * Create a Velocity Context for the site template decorating the document. In addition to all the informations
615      * from the document, this context contains data gathered in {@link SiteRendererSink} during document rendering.
616      *
617      * @param content the document content to be merged into the template
618      * @param siteRenderingContext the site rendering context
619      * @return
620      */
621     protected Context createSiteTemplateVelocityContext( DocumentContent content,
622                                                          SiteRenderingContext siteRenderingContext )
623     {
624         // first get the context from document
625         Context context = createDocumentVelocityContext( content.getRenderingContext(), siteRenderingContext );
626 
627         // then add data objects from rendered document
628 
629         // Add infos from document
630         context.put( "authors", content.getAuthors() );
631 
632         context.put( "shortTitle", content.getTitle() );
633 
634         // DOXIASITETOOLS-70: Prepend the project name to the title, if any
635         String title = "";
636         if ( siteRenderingContext.getDecoration() != null
637                 && siteRenderingContext.getDecoration().getName() != null )
638         {
639             title = siteRenderingContext.getDecoration().getName();
640         }
641         else if ( siteRenderingContext.getDefaultWindowTitle() != null )
642         {
643             title = siteRenderingContext.getDefaultWindowTitle();
644         }
645 
646         if ( title.length() > 0 )
647         {
648             title += " &#x2013; "; // Symbol Name: En Dash, Html Entity: &ndash;
649         }
650         title += content.getTitle();
651 
652         context.put( "title", title );
653 
654         context.put( "headContent", content.getHead() );
655 
656         context.put( "bodyContent", content.getBody() );
657 
658         // document date (got from Doxia Sink date() API)
659         String documentDate = content.getDate();
660         if ( StringUtils.isNotEmpty( documentDate ) )
661         {
662             context.put( "documentDate", documentDate );
663 
664             // deprecated variables that rework the document date, suppose one semantics over others
665             // (ie creation date, while it may be last modification date if the document writer decided so)
666             // see DOXIASITETOOLS-20 for the beginning and DOXIASITETOOLS-164 for the end of this story
667             try
668             {
669                 // we support only ISO 8601 date
670                 Date creationDate = new SimpleDateFormat( "yyyy-MM-dd" ).parse( documentDate );
671 
672                 context.put( "creationDate", creationDate );
673                 SimpleDateFormat sdf = new SimpleDateFormat( "yyyyMMdd" );
674                 context.put( "dateCreation", sdf.format( creationDate ) );
675             }
676             catch ( java.text.ParseException e )
677             {
678                 getLogger().warn( "Could not parse date '" + documentDate + "' from "
679                     + content.getRenderingContext().getInputName()
680                     + " (expected yyyy-MM-dd format), ignoring!" );
681             }
682         }
683 
684         // document rendering context, to get eventual inputName
685         context.put( "docRenderingContext", content.getRenderingContext() );
686 
687         return context;
688     }
689 
690     /** {@inheritDoc} */
691     public void generateDocument( Writer writer, SiteRendererSink sink, SiteRenderingContext siteRenderingContext )
692             throws RendererException
693     {
694         mergeDocumentIntoSite( writer, sink, siteRenderingContext );
695     }
696 
697     /** {@inheritDoc} */
698     public void mergeDocumentIntoSite( Writer writer, DocumentContent content,
699                                            SiteRenderingContext siteRenderingContext )
700         throws RendererException
701     {
702         String templateName = siteRenderingContext.getTemplateName();
703 
704         getLogger().debug( "Processing Velocity for template " + templateName + " on "
705             + content.getRenderingContext().getInputName() );
706 
707         Context context = createSiteTemplateVelocityContext( content, siteRenderingContext );
708 
709         ClassLoader old = null;
710 
711         if ( siteRenderingContext.getTemplateClassLoader() != null )
712         {
713             // -------------------------------------------------------------------------
714             // If no template classloader was set we'll just use the context classloader
715             // -------------------------------------------------------------------------
716 
717             old = Thread.currentThread().getContextClassLoader();
718 
719             Thread.currentThread().setContextClassLoader( siteRenderingContext.getTemplateClassLoader() );
720         }
721 
722         try
723         {
724             Template template;
725             Artifact skin = siteRenderingContext.getSkin();
726 
727             try
728             {
729                 SkinModel skinModel = siteRenderingContext.getSkinModel();
730                 String encoding = ( skinModel == null ) ? null : skinModel.getEncoding();
731 
732                 template = ( encoding == null ) ? velocity.getEngine().getTemplate( templateName )
733                                 : velocity.getEngine().getTemplate( templateName, encoding );
734             }
735             catch ( ParseErrorException pee )
736             {
737                 throw new RendererException( "Velocity parsing error while reading the site decoration template "
738                     + ( ( skin == null ) ? ( "'" + templateName + "'" ) : ( "from " + skin.getId() + " skin" ) ),
739                                              pee );
740             }
741             catch ( ResourceNotFoundException rnfe )
742             {
743                 throw new RendererException( "Could not find the site decoration template "
744                     + ( ( skin == null ) ? ( "'" + templateName + "'" ) : ( "from " + skin.getId() + " skin" ) ),
745                                              rnfe );
746             }
747 
748             try
749             {
750                 StringWriter sw = new StringWriter();
751                 template.merge( context, sw );
752                 writer.write( sw.toString().replaceAll( "\r?\n", SystemUtils.LINE_SEPARATOR ) );
753             }
754             catch ( VelocityException ve )
755             {
756                 throw new RendererException( "Velocity error while merging site decoration template.", ve );
757             }
758             catch ( IOException ioe )
759             {
760                 throw new RendererException( "IO exception while merging site decoration template.", ioe );
761             }
762         }
763         finally
764         {
765             IOUtil.close( writer );
766 
767             if ( old != null )
768             {
769                 Thread.currentThread().setContextClassLoader( old );
770             }
771         }
772     }
773 
774     private SiteRenderingContext createSiteRenderingContext( Map<String, ?> attributes, DecorationModel decoration,
775                                                              String defaultWindowTitle, Locale locale )
776     {
777         SiteRenderingContext context = new SiteRenderingContext();
778 
779         context.setTemplateProperties( attributes );
780         context.setLocale( locale );
781         context.setDecoration( decoration );
782         context.setDefaultWindowTitle( defaultWindowTitle );
783 
784         return context;
785     }
786 
787     /** {@inheritDoc} */
788     public SiteRenderingContext createContextForSkin( Artifact skin, Map<String, ?> attributes,
789                                                       DecorationModel decoration, String defaultWindowTitle,
790                                                       Locale locale )
791             throws IOException, RendererException
792     {
793         SiteRenderingContext context = createSiteRenderingContext( attributes, decoration, defaultWindowTitle, locale );
794 
795         context.setSkin( skin );
796 
797         ZipFile zipFile = getZipFile( skin.getFile() );
798         InputStream in = null;
799 
800         try
801         {
802             if ( zipFile.getEntry( SKIN_TEMPLATE_LOCATION ) != null )
803             {
804                 context.setTemplateName( SKIN_TEMPLATE_LOCATION );
805                 context.setTemplateClassLoader( new URLClassLoader( new URL[]{skin.getFile().toURI().toURL()} ) );
806             }
807             else
808             {
809                 context.setTemplateName( DEFAULT_TEMPLATE );
810                 context.setTemplateClassLoader( getClass().getClassLoader() );
811                 context.setUsingDefaultTemplate( true );
812             }
813 
814             ZipEntry skinDescriptorEntry = zipFile.getEntry( SkinModel.SKIN_DESCRIPTOR_LOCATION );
815             if ( skinDescriptorEntry != null )
816             {
817                 in = zipFile.getInputStream( skinDescriptorEntry );
818 
819                 SkinModel skinModel = new SkinXpp3Reader().read( in );
820                 context.setSkinModel( skinModel );
821 
822                 String toolsPrerequisite =
823                     skinModel.getPrerequisites() == null ? null : skinModel.getPrerequisites().getDoxiaSitetools();
824 
825                 Package p = DefaultSiteRenderer.class.getPackage();
826                 String current = ( p == null ) ? null : p.getImplementationVersion();
827 
828                 if ( StringUtils.isNotBlank( toolsPrerequisite ) && ( current != null )
829                     && !matchVersion( current, toolsPrerequisite ) )
830                 {
831                     throw new RendererException( "Cannot use skin: has " + toolsPrerequisite
832                         + " Doxia Sitetools prerequisite, but current is " + current );
833                 }
834             }
835         }
836         catch ( XmlPullParserException e )
837         {
838             throw new RendererException( "Failed to parse " + SkinModel.SKIN_DESCRIPTOR_LOCATION
839                 + " skin descriptor from " + skin.getId() + " skin", e );
840         }
841         finally
842         {
843             IOUtil.close( in );
844             closeZipFile( zipFile );
845         }
846 
847         return context;
848     }
849 
850     boolean matchVersion( String current, String prerequisite )
851         throws RendererException
852     {
853         try
854         {
855             ArtifactVersion v = new DefaultArtifactVersion( current );
856             VersionRange vr = VersionRange.createFromVersionSpec( prerequisite );
857 
858             boolean matched = false;
859             ArtifactVersion recommendedVersion = vr.getRecommendedVersion();
860             if ( recommendedVersion == null )
861             {
862                 List<Restriction> restrictions = vr.getRestrictions();
863                 for ( Restriction restriction : restrictions )
864                 {
865                     if ( restriction.containsVersion( v ) )
866                     {
867                         matched = true;
868                         break;
869                     }
870                 }
871             }
872             else
873             {
874                 // only singular versions ever have a recommendedVersion
875                 @SuppressWarnings( "unchecked" )
876                 int compareTo = recommendedVersion.compareTo( v );
877                 matched = ( compareTo <= 0 );
878             }
879 
880             if ( getLogger().isDebugEnabled() )
881             {
882                 getLogger().debug( "Skin doxia-sitetools prerequisite: " + prerequisite + ", current: " + current
883                     + ", matched = " + matched );
884             }
885 
886             return matched;
887         }
888         catch ( InvalidVersionSpecificationException e )
889         {
890             throw new RendererException( "Invalid skin doxia-sitetools prerequisite: " + prerequisite, e );
891         }
892     }
893 
894     /** {@inheritDoc} */
895     @Deprecated
896     public SiteRenderingContext createContextForTemplate( File templateFile, Map<String, ?> attributes,
897                                                           DecorationModel decoration, String defaultWindowTitle,
898                                                           Locale locale )
899             throws MalformedURLException
900     {
901         SiteRenderingContext context = createSiteRenderingContext( attributes, decoration, defaultWindowTitle, locale );
902 
903         context.setTemplateName( templateFile.getName() );
904         context.setTemplateClassLoader( new URLClassLoader( new URL[]{templateFile.getParentFile().toURI().toURL()} ) );
905 
906         return context;
907     }
908 
909     /** {@inheritDoc} */
910     public void copyResources( SiteRenderingContext siteRenderingContext, File resourcesDirectory,
911                                File outputDirectory )
912         throws IOException
913     {
914         throw new AssertionError( "copyResources( SiteRenderingContext, File, File ) is deprecated." );
915     }
916 
917     /** {@inheritDoc} */
918     public void copyResources( SiteRenderingContext siteRenderingContext, File outputDirectory )
919         throws IOException
920     {
921         if ( siteRenderingContext.getSkin() != null )
922         {
923             ZipFile file = getZipFile( siteRenderingContext.getSkin().getFile() );
924 
925             try
926             {
927                 for ( Enumeration<? extends ZipEntry> e = file.entries(); e.hasMoreElements(); )
928                 {
929                     ZipEntry entry = e.nextElement();
930 
931                     if ( !entry.getName().startsWith( "META-INF/" ) )
932                     {
933                         File destFile = new File( outputDirectory, entry.getName() );
934                         if ( !entry.isDirectory() )
935                         {
936                             if ( destFile.exists() )
937                             {
938                                 // don't override existing content: avoids extra rewrite with same content or extra site
939                                 // resource
940                                 continue;
941                             }
942 
943                             destFile.getParentFile().mkdirs();
944 
945                             copyFileFromZip( file, entry, destFile );
946                         }
947                         else
948                         {
949                             destFile.mkdirs();
950                         }
951                     }
952                 }
953             }
954             finally
955             {
956                 closeZipFile( file );
957             }
958         }
959 
960         if ( siteRenderingContext.isUsingDefaultTemplate() )
961         {
962             InputStream resourceList = getClass().getClassLoader()
963                     .getResourceAsStream( RESOURCE_DIR + "/resources.txt" );
964 
965             if ( resourceList != null )
966             {
967                 Reader r = null;
968                 LineNumberReader reader = null;
969                 try
970                 {
971                     r = ReaderFactory.newReader( resourceList, ReaderFactory.UTF_8 );
972                     reader = new LineNumberReader( r );
973 
974                     String line;
975 
976                     while ( ( line = reader.readLine() ) != null )
977                     {
978                         if ( line.startsWith( "#" ) || line.trim().length() == 0 )
979                         {
980                             continue;
981                         }
982 
983                         InputStream is = getClass().getClassLoader().getResourceAsStream( RESOURCE_DIR + "/" + line );
984 
985                         if ( is == null )
986                         {
987                             throw new IOException( "The resource " + line + " doesn't exist." );
988                         }
989 
990                         File outputFile = new File( outputDirectory, line );
991 
992                         if ( outputFile.exists() )
993                         {
994                             // don't override existing content: avoids extra rewrite with same content or extra site
995                             // resource
996                             continue;
997                         }
998 
999                         if ( !outputFile.getParentFile().exists() )
1000                         {
1001                             outputFile.getParentFile().mkdirs();
1002                         }
1003 
1004                         OutputStream os = null;
1005                         try
1006                         {
1007                             // for the images
1008                             os = new FileOutputStream( outputFile );
1009                             IOUtil.copy( is, os );
1010                         }
1011                         finally
1012                         {
1013                             IOUtil.close( os );
1014                         }
1015 
1016                         IOUtil.close( is );
1017                     }
1018                 }
1019                 finally
1020                 {
1021                     IOUtil.close( reader );
1022                     IOUtil.close( r );
1023                 }
1024             }
1025         }
1026 
1027         // Copy extra site resources
1028         for ( File siteDirectory : siteRenderingContext.getSiteDirectories() )
1029         {
1030             File resourcesDirectory = new File( siteDirectory, "resources" );
1031 
1032             if ( resourcesDirectory != null && resourcesDirectory.exists() )
1033             {
1034                 copyDirectory( resourcesDirectory, outputDirectory );
1035             }
1036         }
1037 
1038         // Check for the existence of /css/site.css
1039         File siteCssFile = new File( outputDirectory, "/css/site.css" );
1040         if ( !siteCssFile.exists() )
1041         {
1042             // Create the subdirectory css if it doesn't exist, DOXIA-151
1043             File cssDirectory = new File( outputDirectory, "/css/" );
1044             boolean created = cssDirectory.mkdirs();
1045             if ( created && getLogger().isDebugEnabled() )
1046             {
1047                 getLogger().debug(
1048                     "The directory '" + cssDirectory.getAbsolutePath() + "' did not exist. It was created." );
1049             }
1050 
1051             // If the file is not there - create an empty file, DOXIA-86
1052             if ( getLogger().isDebugEnabled() )
1053             {
1054                 getLogger().debug(
1055                     "The file '" + siteCssFile.getAbsolutePath() + "' does not exist. Creating an empty file." );
1056             }
1057             Writer writer = null;
1058             try
1059             {
1060                 writer = WriterFactory.newWriter( siteCssFile, siteRenderingContext.getOutputEncoding() );
1061                 //DOXIA-290...the file should not be 0 bytes.
1062                 writer.write( "/* You can override this file with your own styles */"  );
1063             }
1064             finally
1065             {
1066                 IOUtil.close( writer );
1067             }
1068         }
1069     }
1070 
1071     private static void copyFileFromZip( ZipFile file, ZipEntry entry, File destFile )
1072             throws IOException
1073     {
1074         FileOutputStream fos = new FileOutputStream( destFile );
1075 
1076         try
1077         {
1078             IOUtil.copy( file.getInputStream( entry ), fos );
1079         }
1080         finally
1081         {
1082             IOUtil.close( fos );
1083         }
1084     }
1085 
1086     /**
1087      * Copy the directory
1088      *
1089      * @param source      source file to be copied
1090      * @param destination destination file
1091      * @throws java.io.IOException if any
1092      */
1093     protected void copyDirectory( File source, File destination )
1094             throws IOException
1095     {
1096         if ( source.exists() )
1097         {
1098             DirectoryScanner scanner = new DirectoryScanner();
1099 
1100             String[] includedResources = {"**/**"};
1101 
1102             scanner.setIncludes( includedResources );
1103 
1104             scanner.addDefaultExcludes();
1105 
1106             scanner.setBasedir( source );
1107 
1108             scanner.scan();
1109 
1110             List<String> includedFiles = Arrays.asList( scanner.getIncludedFiles() );
1111 
1112             for ( String name : includedFiles )
1113             {
1114                 File sourceFile = new File( source, name );
1115 
1116                 File destinationFile = new File( destination, name );
1117 
1118                 FileUtils.copyFile( sourceFile, destinationFile );
1119             }
1120         }
1121     }
1122 
1123     private Reader validate( Reader source, String resource )
1124             throws ParseException, IOException
1125     {
1126         getLogger().debug( "Validating: " + resource );
1127 
1128         try
1129         {
1130             String content = IOUtil.toString( new BufferedReader( source ) );
1131 
1132             new XmlValidator( new PlexusLoggerWrapper( getLogger() ) ).validate( content );
1133 
1134             return new StringReader( content );
1135         }
1136         finally
1137         {
1138             IOUtil.close( source );
1139         }
1140     }
1141 
1142     // TODO replace with StringUtils.endsWithIgnoreCase() from maven-shared-utils 0.7
1143     static boolean endsWithIgnoreCase( String str, String searchStr )
1144     {
1145         if ( str.length() < searchStr.length() )
1146         {
1147             return false;
1148         }
1149 
1150         return str.regionMatches( true, str.length() - searchStr.length(), searchStr, 0, searchStr.length() );
1151     }
1152 
1153     private static ZipFile getZipFile( File file )
1154         throws IOException
1155     {
1156         if ( file == null )
1157         {
1158             throw new IOException( "Error opening ZipFile: null" );
1159         }
1160 
1161         try
1162         {
1163             // TODO: plexus-archiver, if it could do the excludes
1164             return new ZipFile( file );
1165         }
1166         catch ( ZipException ex )
1167         {
1168             IOException ioe = new IOException( "Error opening ZipFile: " + file.getAbsolutePath() );
1169             ioe.initCause( ex );
1170             throw ioe;
1171         }
1172     }
1173 
1174     private static void closeZipFile( ZipFile zipFile )
1175     {
1176         // TODO: move to plexus utils
1177         try
1178         {
1179             zipFile.close();
1180         }
1181         catch ( IOException e )
1182         {
1183             // ignore
1184         }
1185     }
1186 }