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1   package org.apache.maven.plugin.surefire;
2   
3   import java.util.ArrayList;
4   import java.util.Iterator;
5   import java.util.List;
6   
7   import org.apache.maven.plugin.AbstractMojo;
8   import org.apache.maven.plugin.MojoExecutionException;
9   
10  /**
11   * Display help information on maven-surefire-plugin.<br/> Call <pre>  mvn surefire:help -Ddetail=true -Dgoal=&lt;goal-name&gt;</pre> to display parameter details.
12   *
13   * @version generated on Tue Jan 24 23:20:22 CET 2012
14   * @author org.apache.maven.tools.plugin.generator.PluginHelpGenerator (version 2.8)
15   * @goal help
16   * @requiresProject false
17   * @threadSafe
18   */
19  @SuppressWarnings( "all" )
20  public class HelpMojo
21      extends AbstractMojo
22  {
23      /**
24       * If <code>true</code>, display all settable properties for each goal.
25       * 
26       * @parameter expression="${detail}" default-value="false"
27       */
28      private boolean detail;
29  
30      /**
31       * The name of the goal for which to show help. If unspecified, all goals will be displayed.
32       * 
33       * @parameter expression="${goal}"
34       */
35      private java.lang.String goal;
36  
37      /**
38       * The maximum length of a display line, should be positive.
39       * 
40       * @parameter expression="${lineLength}" default-value="80"
41       */
42      private int lineLength;
43  
44      /**
45       * The number of spaces per indentation level, should be positive.
46       * 
47       * @parameter expression="${indentSize}" default-value="2"
48       */
49      private int indentSize;
50  
51  
52      /** {@inheritDoc} */
53      public void execute()
54          throws MojoExecutionException
55      {
56          if ( lineLength <= 0 )
57          {
58              getLog().warn( "The parameter 'lineLength' should be positive, using '80' as default." );
59              lineLength = 80;
60          }
61          if ( indentSize <= 0 )
62          {
63              getLog().warn( "The parameter 'indentSize' should be positive, using '2' as default." );
64              indentSize = 2;
65          }
66  
67          StringBuffer sb = new StringBuffer();
68  
69          append( sb, "org.apache.maven.plugins:maven-surefire-plugin:2.12", 0 );
70          append( sb, "", 0 );
71  
72          append( sb, "Maven Surefire Plugin", 0 );
73          append( sb, "Surefire is a test framework project.", 1 );
74          append( sb, "", 0 );
75  
76          if ( goal == null || goal.length() <= 0 )
77          {
78              append( sb, "This plugin has 2 goals:", 0 );
79              append( sb, "", 0 );
80          }
81  
82          if ( goal == null || goal.length() <= 0 || "help".equals( goal ) )
83          {
84              append( sb, "surefire:help", 0 );
85              append( sb, "Display help information on maven-surefire-plugin.\nCall\n\u00a0\u00a0mvn\u00a0surefire:help\u00a0-Ddetail=true\u00a0-Dgoal=<goal-name>\nto display parameter details.", 1 );
86              append( sb, "", 0 );
87              if ( detail )
88              {
89                  append( sb, "Available parameters:", 1 );
90                  append( sb, "", 0 );
91  
92                  append( sb, "detail (Default: false)", 2 );
93                  append( sb, "If true, display all settable properties for each goal.", 3 );
94                  append( sb, "Expression: ${detail}", 3 );
95                  append( sb, "", 0 );
96  
97                  append( sb, "goal", 2 );
98                  append( sb, "The name of the goal for which to show help. If unspecified, all goals will be displayed.", 3 );
99                  append( sb, "Expression: ${goal}", 3 );
100                 append( sb, "", 0 );
101 
102                 append( sb, "indentSize (Default: 2)", 2 );
103                 append( sb, "The number of spaces per indentation level, should be positive.", 3 );
104                 append( sb, "Expression: ${indentSize}", 3 );
105                 append( sb, "", 0 );
106 
107                 append( sb, "lineLength (Default: 80)", 2 );
108                 append( sb, "The maximum length of a display line, should be positive.", 3 );
109                 append( sb, "Expression: ${lineLength}", 3 );
110                 append( sb, "", 0 );
111             }
112         }
113 
114         if ( goal == null || goal.length() <= 0 || "test".equals( goal ) )
115         {
116             append( sb, "surefire:test", 0 );
117             append( sb, "Run tests using Surefire.", 1 );
118             append( sb, "", 0 );
119             if ( detail )
120             {
121                 append( sb, "Available parameters:", 1 );
122                 append( sb, "", 0 );
123 
124                 append( sb, "additionalClasspathElements", 2 );
125                 append( sb, "Additional elements to be appended to the classpath.", 3 );
126                 append( sb, "", 0 );
127 
128                 append( sb, "argLine", 2 );
129                 append( sb, "Arbitrary JVM options to set on the command line.", 3 );
130                 append( sb, "Expression: ${argLine}", 3 );
131                 append( sb, "", 0 );
132 
133                 append( sb, "basedir (Default: ${basedir})", 2 );
134                 append( sb, "The base directory of the project being tested. This can be obtained in your unit test via System.getProperty(\'basedir\').", 3 );
135                 append( sb, "", 0 );
136 
137                 append( sb, "childDelegation (Default: false)", 2 );
138                 append( sb, "When false it makes tests run using the standard classloader delegation instead of the default Maven isolated classloader. Only used when forking (forkMode is not \'none\').\nSetting it to false helps with some problems caused by conflicts between xml parsers in the classpath and the Java 5 provider parser.", 3 );
139                 append( sb, "Expression: ${childDelegation}", 3 );
140                 append( sb, "", 0 );
141 
142                 append( sb, "classesDirectory (Default: ${project.build.outputDirectory})", 2 );
143                 append( sb, "The directory containing generated classes of the project being tested. This will be included after the test classes in the test classpath.", 3 );
144                 append( sb, "", 0 );
145 
146                 append( sb, "classpathDependencyExcludes", 2 );
147                 append( sb, "List of dependencies to exclude from the test classpath. Each dependency string must follow the format groupId:artifactId. For example: org.acme:project-a", 3 );
148                 append( sb, "", 0 );
149 
150                 append( sb, "classpathDependencyScopeExclude", 2 );
151                 append( sb, "A dependency scope to exclude from the test classpath. The scope can be one of the following scopes:\n-\tcompile - system, provided, compile\n-\truntime - compile, runtime\n-\ttest - system, provided, compile, runtime, test\n", 3 );
152                 append( sb, "", 0 );
153 
154                 append( sb, "debugForkedProcess", 2 );
155                 append( sb, "Attach a debugger to the forked JVM. If set to \'true\', the process will suspend and wait for a debugger to attach on port 5005. If set to some other string, that string will be appended to the argLine, allowing you to configure arbitrary debuggability options (without overwriting the other options specified through the argLine parameter).", 3 );
156                 append( sb, "Expression: ${maven.surefire.debug}", 3 );
157                 append( sb, "", 0 );
158 
159                 append( sb, "disableXmlReport (Default: false)", 2 );
160                 append( sb, "Flag to disable the generation of report files in xml format.", 3 );
161                 append( sb, "Expression: ${disableXmlReport}", 3 );
162                 append( sb, "", 0 );
163 
164                 append( sb, "enableAssertions (Default: true)", 2 );
165                 append( sb, "By default, Surefire enables JVM assertions for the execution of your test cases. To disable the assertions, set this flag to \'false\'.", 3 );
166                 append( sb, "Expression: ${enableAssertions}", 3 );
167                 append( sb, "", 0 );
168 
169                 append( sb, "environmentVariables", 2 );
170                 append( sb, "Additional environment variables to set on the command line.", 3 );
171                 append( sb, "", 0 );
172 
173                 append( sb, "excludedGroups", 2 );
174                 append( sb, "(TestNG/JUnit47 provider with JUnit4.8+ only) Excluded groups. Any methods/classes/etc with one of the groups specified in this list will specifically not be run.\nFor JUnit, this parameter forces the use of the 4.7 provider\nThis parameter is ignored if the suiteXmlFiles parameter is specified.", 3 );
175                 append( sb, "Expression: ${excludedGroups}", 3 );
176                 append( sb, "", 0 );
177 
178                 append( sb, "excludes", 2 );
179                 append( sb, "A list of <exclude> elements specifying the tests (by pattern) that should be excluded in testing. When not specified and when the test parameter is not specified, the default excludes will be \n<excludes>\n\u00a0<exclude>**/*$*</exclude>\n</excludes>\n(which excludes all inner classes).\nThis parameter is ignored if the TestNG suiteXmlFiles parameter is specified.", 3 );
180                 append( sb, "", 0 );
181 
182                 append( sb, "failIfNoSpecifiedTests", 2 );
183                 append( sb, "Set this to \'true\' to cause a failure if the none of the tests specified in -Dtest=... are run. Defaults to \'true\'.", 3 );
184                 append( sb, "Expression: ${surefire.failIfNoSpecifiedTests}", 3 );
185                 append( sb, "", 0 );
186 
187                 append( sb, "failIfNoTests", 2 );
188                 append( sb, "Set this to \'true\' to cause a failure if there are no tests to run. Defaults to \'false\'.", 3 );
189                 append( sb, "Expression: ${failIfNoTests}", 3 );
190                 append( sb, "", 0 );
191 
192                 append( sb, "forkedProcessTimeoutInSeconds", 2 );
193                 append( sb, "Kill the forked test process after a certain number of seconds. If set to 0, wait forever for the process, never timing out.", 3 );
194                 append( sb, "Expression: ${surefire.timeout}", 3 );
195                 append( sb, "", 0 );
196 
197                 append( sb, "forkMode (Default: once)", 2 );
198                 append( sb, "Option to specify the forking mode. Can be \'never\', \'once\', \'always\' or \'perthread\'. \'none\' and \'pertest\' are also accepted for backwards compatibility. \'always\' forks for each test-class. \'perthread\' will create \'threadCount\' parallel forks.", 3 );
199                 append( sb, "Expression: ${forkMode}", 3 );
200                 append( sb, "", 0 );
201 
202                 append( sb, "groups", 2 );
203                 append( sb, "(TestNG/JUnit47 provider with JUnit4.8+ only) Groups for this test. Only classes/methods/etc decorated with one of the groups specified here will be included in test run, if specified.\nFor JUnit, this parameter forces the use of the 4.7 provider\nThis parameter is ignored if the suiteXmlFiles parameter is specified. .", 3 );
204                 append( sb, "Expression: ${groups}", 3 );
205                 append( sb, "", 0 );
206 
207                 append( sb, "includes", 2 );
208                 append( sb, "A list of <include> elements specifying the tests (by pattern) that should be included in testing. When not specified and when the test parameter is not specified, the default includes will be \n<includes>\n\u00a0<include>**/Test*.java</include>\n\u00a0<include>**/*Test.java</include>\n\u00a0<include>**/*TestCase.java</include>\n</includes>\nThis parameter is ignored if the TestNG suiteXmlFiles parameter is specified.", 3 );
209                 append( sb, "", 0 );
210 
211                 append( sb, "junitArtifactName (Default: junit:junit)", 2 );
212                 append( sb, "Allows you to specify the name of the JUnit artifact. If not set, junit:junit will be used.", 3 );
213                 append( sb, "Expression: ${junitArtifactName}", 3 );
214                 append( sb, "", 0 );
215 
216                 append( sb, "jvm", 2 );
217                 append( sb, "Option to specify the jvm (or path to the java executable) to use with the forking options. For the default, the jvm will be a new instance of the same VM as the one used to run Maven. JVM settings are not inherited from MAVEN_OPTS.", 3 );
218                 append( sb, "Expression: ${jvm}", 3 );
219                 append( sb, "", 0 );
220 
221                 append( sb, "objectFactory", 2 );
222                 append( sb, "(TestNG only) Define the factory class used to create all test instances.", 3 );
223                 append( sb, "Expression: ${objectFactory}", 3 );
224                 append( sb, "", 0 );
225 
226                 append( sb, "parallel", 2 );
227                 append( sb, "(TestNG only) When you use the parallel attribute, TestNG will try to run all your test methods in separate threads, except for methods that depend on each other, which will be run in the same thread in order to respect their order of execution. (JUnit 4.7 provider) Supports values \'classes\'/\'methods\'/\'both\' to run in separate threads, as controlled by threadCount.", 3 );
228                 append( sb, "Expression: ${parallel}", 3 );
229                 append( sb, "", 0 );
230 
231                 append( sb, "perCoreThreadCount (Default: true)", 2 );
232                 append( sb, "(JUnit 4.7 provider) Indicates that threadCount is per cpu core.", 3 );
233                 append( sb, "Expression: ${perCoreThreadCount}", 3 );
234                 append( sb, "", 0 );
235 
236                 append( sb, "printSummary (Default: true)", 2 );
237                 append( sb, "Option to print summary of test suites or just print the test cases that have errors.", 3 );
238                 append( sb, "Expression: ${surefire.printSummary}", 3 );
239                 append( sb, "", 0 );
240 
241                 append( sb, "properties", 2 );
242                 append( sb, "List of properties for configuring all TestNG related configurations. This is the new preferred method of configuring TestNG.", 3 );
243                 append( sb, "", 0 );
244 
245                 append( sb, "redirectTestOutputToFile (Default: false)", 2 );
246                 append( sb, "Set this to \'true\' to redirect the unit test standard output to a file (found in reportsDirectory/testName-output.txt).", 3 );
247                 append( sb, "Expression: ${maven.test.redirectTestOutputToFile}", 3 );
248                 append( sb, "", 0 );
249 
250                 append( sb, "remoteRepositories", 2 );
251                 append( sb, "The remote plugin repositories declared in the POM.", 3 );
252                 append( sb, "Expression: ${project.pluginArtifactRepositories}", 3 );
253                 append( sb, "", 0 );
254 
255                 append( sb, "reportFormat (Default: brief)", 2 );
256                 append( sb, "Selects the formatting for the test report to be generated. Can be set as \'brief\' or \'plain\'.", 3 );
257                 append( sb, "Expression: ${surefire.reportFormat}", 3 );
258                 append( sb, "", 0 );
259 
260                 append( sb, "reportNameSuffix", 2 );
261                 append( sb, "Add custom text into report filename: TEST-testClassName-reportNameSuffix.xml, testClassName-reportNameSuffix.txt and testClassName-reportNameSuffix-output.txt. File TEST-testClassName-reportNameSuffix.xml has changed attributes \'testsuite\'--\'name\' and \'testcase\'--\'classname\' - reportNameSuffix is added to the attribute value.", 3 );
262                 append( sb, "Expression: ${surefire.reportNameSuffix}", 3 );
263                 append( sb, "", 0 );
264 
265                 append( sb, "reportsDirectory (Default: ${project.build.directory}/surefire-reports)", 2 );
266                 append( sb, "Base directory where all reports are written to.", 3 );
267                 append( sb, "", 0 );
268 
269                 append( sb, "runOrder (Default: filesystem)", 2 );
270                 append( sb, "Defines the order the tests will be run in. Supported values are \'alphabetical\', \'reversealphabetical\', \'random\', \'hourly\' (alphabetical on even hours, reverse alphabetical on odd hours), \'failedfirst\', \'balanced\' and \'filesystem\'. Odd/Even for hourly is determined at the time the of scanning the classpath, meaning it could change during a multi-module build. Failed first will run tests that failed on previous run first, as well as new tests for this run. Balanced is only relevant with parallel=classes, and will try to optimize the run-order of the tests to make all tests complete at the same time, reducing the overall execution time. Note that the statistics are stored in a file named .surefire-XXXXXXXXX beside pom.xml, and should not be checked into version control. The \'XXXXX\' is the SHA1 checksum of the entire surefire configuration, so different configurations will have different statistics files, meaning if you change any config settings you will re-run once before new statistics data can be established.", 3 );
271                 append( sb, "", 0 );
272 
273                 append( sb, "skip (Default: false)", 2 );
274                 append( sb, "Set this to \'true\' to bypass unit tests entirely. Its use is NOT RECOMMENDED, especially if you enable it using the \'maven.test.skip\' property, because maven.test.skip disables both running the tests and compiling the tests. Consider using the skipTests parameter instead.", 3 );
275                 append( sb, "Expression: ${maven.test.skip}", 3 );
276                 append( sb, "", 0 );
277 
278                 append( sb, "skipExec", 2 );
279                 append( sb, "Deprecated. Use skipTests instead.", 3 );
280                 append( sb, "", 0 );
281                 append( sb, "This old parameter is just like skipTests, but bound to the old property \'maven.test.skip.exec\'.", 3 );
282                 append( sb, "Expression: ${maven.test.skip.exec}", 3 );
283                 append( sb, "", 0 );
284 
285                 append( sb, "skipTests (Default: false)", 2 );
286                 append( sb, "Set this to \'true\' to skip running tests, but still compile them. Its use is NOT RECOMMENDED, but quite convenient on occasion.", 3 );
287                 append( sb, "Expression: ${skipTests}", 3 );
288                 append( sb, "", 0 );
289 
290                 append( sb, "suiteXmlFiles", 2 );
291                 append( sb, "(TestNG) List of <suiteXmlFile> elements specifying TestNG suite xml file locations. Note that suiteXmlFiles is incompatible with several other parameters of this plugin, like includes/excludes.\nThis parameter is ignored if the test parameter is specified (allowing you to run a single test instead of an entire suite).", 3 );
292                 append( sb, "", 0 );
293 
294                 append( sb, "systemProperties", 2 );
295                 append( sb, "Deprecated. Use systemPropertyVariables instead.", 3 );
296                 append( sb, "", 0 );
297                 append( sb, "List of System properties to pass to the JUnit tests.", 3 );
298                 append( sb, "", 0 );
299 
300                 append( sb, "systemPropertiesFile", 2 );
301                 append( sb, "List of System properties, loaded from a file, to pass to the JUnit tests.", 3 );
302                 append( sb, "", 0 );
303 
304                 append( sb, "systemPropertyVariables", 2 );
305                 append( sb, "List of System properties to pass to the JUnit tests.", 3 );
306                 append( sb, "", 0 );
307 
308                 append( sb, "test", 2 );
309                 append( sb, "Specify this parameter to run individual tests by file name, overriding the includes/excludes parameters. Each pattern you specify here will be used to create an include pattern formatted like **/${test}.java, so you can just type \'-Dtest=MyTest\' to run a single test called \'foo/MyTest.java\'.\nThis parameter overrides the includes/excludes parameters, and the TestNG suiteXmlFiles parameter. Since 2.7.3, you can execute a limited number of methods in the test by adding #myMethod or #my*ethod. For example, \'-Dtest=MyTest#myMethod\'. This is supported for junit 4.x and testNg.", 3 );
310                 append( sb, "Expression: ${test}", 3 );
311                 append( sb, "", 0 );
312 
313                 append( sb, "testClassesDirectory (Default: ${project.build.testOutputDirectory})", 2 );
314                 append( sb, "The directory containing generated test classes of the project being tested. This will be included at the beginning of the test classpath. *", 3 );
315                 append( sb, "", 0 );
316 
317                 append( sb, "testFailureIgnore (Default: false)", 2 );
318                 append( sb, "Set this to \'true\' to ignore a failure during testing. Its use is NOT RECOMMENDED, but quite convenient on occasion.", 3 );
319                 append( sb, "Expression: ${maven.test.failure.ignore}", 3 );
320                 append( sb, "", 0 );
321 
322                 append( sb, "testNGArtifactName (Default: org.testng:testng)", 2 );
323                 append( sb, "Allows you to specify the name of the TestNG artifact. If not set, org.testng:testng will be used.", 3 );
324                 append( sb, "Expression: ${testNGArtifactName}", 3 );
325                 append( sb, "", 0 );
326 
327                 append( sb, "testSourceDirectory (Default: ${project.build.testSourceDirectory})", 2 );
328                 append( sb, "The test source directory containing test class sources.", 3 );
329                 append( sb, "Required: Yes", 3 );
330                 append( sb, "", 0 );
331 
332                 append( sb, "threadCount", 2 );
333                 append( sb, "(forkMode=perthread or TestNG/JUnit 4.7 provider) The attribute thread-count allows you to specify how many threads should be allocated for this execution. Only makes sense to use in conjunction with the parallel parameter. (forkMode=perthread does not support/require the parallel parameter)", 3 );
334                 append( sb, "Expression: ${threadCount}", 3 );
335                 append( sb, "", 0 );
336 
337                 append( sb, "trimStackTrace (Default: true)", 2 );
338                 append( sb, "Whether to trim the stack trace in the reports to just the lines within the test, or show the full trace.", 3 );
339                 append( sb, "Expression: ${trimStackTrace}", 3 );
340                 append( sb, "", 0 );
341 
342                 append( sb, "useFile (Default: true)", 2 );
343                 append( sb, "Option to generate a file test report or just output the test report to the console.", 3 );
344                 append( sb, "Expression: ${surefire.useFile}", 3 );
345                 append( sb, "", 0 );
346 
347                 append( sb, "useManifestOnlyJar (Default: true)", 2 );
348                 append( sb, "By default, Surefire forks your tests using a manifest-only JAR; set this parameter to \'false\' to force it to launch your tests with a plain old Java classpath. (See http://maven.apache.org/plugins/maven-surefire-plugin/examples/class-loading.html for a more detailed explanation of manifest-only JARs and their benefits.) Beware, setting this to \'false\' may cause your tests to fail on Windows if your classpath is too long.", 3 );
349                 append( sb, "Expression: ${surefire.useManifestOnlyJar}", 3 );
350                 append( sb, "", 0 );
351 
352                 append( sb, "useSystemClassLoader (Default: true)", 2 );
353                 append( sb, "Option to pass dependencies to the system\'s classloader instead of using an isolated class loader when forking. Prevents problems with JDKs which implement the service provider lookup mechanism by using the system\'s classloader.", 3 );
354                 append( sb, "Expression: ${surefire.useSystemClassLoader}", 3 );
355                 append( sb, "", 0 );
356 
357                 append( sb, "useUnlimitedThreads (Default: false)", 2 );
358                 append( sb, "(JUnit 4.7 provider) Indicates that the thread pool will be unlimited. The parallel parameter and the actual number of classes/methods will decide. Setting this to \'true\' effectively disables perCoreThreadCount and threadCount. Defaults to \'false\'.", 3 );
359                 append( sb, "Expression: ${useUnlimitedThreads}", 3 );
360                 append( sb, "", 0 );
361 
362                 append( sb, "workingDirectory", 2 );
363                 append( sb, "Command line working directory.", 3 );
364                 append( sb, "Expression: ${basedir}", 3 );
365                 append( sb, "", 0 );
366             }
367         }
368 
369         if ( getLog().isInfoEnabled() )
370         {
371             getLog().info( sb.toString() );
372         }
373     }
374 
375     /**
376      * <p>Repeat a String <code>n</code> times to form a new string.</p>
377      *
378      * @param str String to repeat
379      * @param repeat number of times to repeat str
380      * @return String with repeated String
381      * @throws NegativeArraySizeException if <code>repeat < 0</code>
382      * @throws NullPointerException if str is <code>null</code>
383      */
384     private static String repeat( String str, int repeat )
385     {
386         StringBuffer buffer = new StringBuffer( repeat * str.length() );
387 
388         for ( int i = 0; i < repeat; i++ )
389         {
390             buffer.append( str );
391         }
392 
393         return buffer.toString();
394     }
395 
396     /** 
397      * Append a description to the buffer by respecting the indentSize and lineLength parameters.
398      * <b>Note</b>: The last character is always a new line.
399      * 
400      * @param sb The buffer to append the description, not <code>null</code>.
401      * @param description The description, not <code>null</code>.
402      * @param indent The base indentation level of each line, must not be negative.
403      */
404     private void append( StringBuffer sb, String description, int indent )
405     {
406         for ( Iterator it = toLines( description, indent, indentSize, lineLength ).iterator(); it.hasNext(); )
407         {
408             sb.append( it.next().toString() ).append( '\n' );
409         }
410     }
411 
412     /** 
413      * Splits the specified text into lines of convenient display length.
414      * 
415      * @param text The text to split into lines, must not be <code>null</code>.
416      * @param indent The base indentation level of each line, must not be negative.
417      * @param indentSize The size of each indentation, must not be negative.
418      * @param lineLength The length of the line, must not be negative.
419      * @return The sequence of display lines, never <code>null</code>.
420      * @throws NegativeArraySizeException if <code>indent < 0</code>
421      */
422     private static List toLines( String text, int indent, int indentSize, int lineLength )
423     {
424         List<String> lines = new ArrayList<String>();
425 
426         String ind = repeat( "\t", indent );
427         String[] plainLines = text.split( "(\r\n)|(\r)|(\n)" );
428         for ( int i = 0; i < plainLines.length; i++ )
429         {
430             toLines( lines, ind + plainLines[i], indentSize, lineLength );
431         }
432 
433         return lines;
434     }
435 
436     /** 
437      * Adds the specified line to the output sequence, performing line wrapping if necessary.
438      * 
439      * @param lines The sequence of display lines, must not be <code>null</code>.
440      * @param line The line to add, must not be <code>null</code>.
441      * @param indentSize The size of each indentation, must not be negative.
442      * @param lineLength The length of the line, must not be negative.
443      */
444     private static void toLines( List<String> lines, String line, int indentSize, int lineLength )
445     {
446         int lineIndent = getIndentLevel( line );
447         StringBuffer buf = new StringBuffer( 256 );
448         String[] tokens = line.split( " +" );
449         for ( int i = 0; i < tokens.length; i++ )
450         {
451             String token = tokens[i];
452             if ( i > 0 )
453             {
454                 if ( buf.length() + token.length() >= lineLength )
455                 {
456                     lines.add( buf.toString() );
457                     buf.setLength( 0 );
458                     buf.append( repeat( " ", lineIndent * indentSize ) );
459                 }
460                 else
461                 {
462                     buf.append( ' ' );
463                 }
464             }
465             for ( int j = 0; j < token.length(); j++ )
466             {
467                 char c = token.charAt( j );
468                 if ( c == '\t' )
469                 {
470                     buf.append( repeat( " ", indentSize - buf.length() % indentSize ) );
471                 }
472                 else if ( c == '\u00A0' )
473                 {
474                     buf.append( ' ' );
475                 }
476                 else
477                 {
478                     buf.append( c );
479                 }
480             }
481         }
482         lines.add( buf.toString() );
483     }
484 
485     /** 
486      * Gets the indentation level of the specified line.
487      * 
488      * @param line The line whose indentation level should be retrieved, must not be <code>null</code>.
489      * @return The indentation level of the line.
490      */
491     private static int getIndentLevel( String line )
492     {
493         int level = 0;
494         for ( int i = 0; i < line.length() && line.charAt( i ) == '\t'; i++ )
495         {
496             level++;
497         }
498         for ( int i = level + 1; i <= level + 4 && i < line.length(); i++ )
499         {
500             if ( line.charAt( i ) == '\t' )
501             {
502                 level++;
503                 break;
504             }
505         }
506         return level;
507     }
508 }