 -----
 Introduction
 -----
 Hervé Boutemy
 Dennis Lundberg
 ------
 2015-12-20
 ------

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~~   http://www.apache.org/licenses/LICENSE-2.0
~~
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~~ software distributed under the License is distributed on an
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~~ NOTE: For help with the syntax of this file, see:
~~ http://maven.apache.org/doxia/references/apt-format.html

Doxia Sitetools - Site Renderer

  The Site Renderer handles the rendering of sites, assembling a common site template (also called <a skin>)
  with a collection of documents.

  Documents can be dynamically generated with {{{/doxia/doxia/doxia-sink-api/}Doxia Sink API}}, like Maven reports,
  or simply read from static files written in {{{/doxia/references/index.html}markup supported by Doxia Parsers}},
  eventually processed by {{{https://velocity.apache.org/engine/${velocityEngineVersion}/}Velocity}}
  if their file names end in <<<.vm>>>.

[doxia-site-renderer.png]

* Doxia Site Skins

  A default site template is included (see <<<default-site.vm>>>), but other templates can be used at will,
  either as a standalone template or packaged in a {{{../doxia-skin-model/}<<skin>> artifact}}.

  Maven team provides {{{/skins/}a collection of skins}} for projects use.

  Some documentation is available on {{{/plugins/maven-site-plugin/examples/creatingskins.html}how to create a new skin}}.

* Velocity processing

  Site and documents with file names ending in <<<.vm>>> are processed by Velocity.

  The Velocity context contains some variables related to rendering context that you can use:

*---------------------------------+----------------------+-------------------------------+
|| Variable                       || Type                || Description                 ||
*---------------------------------+----------------------+-------------------------------+
| <<<alignedFileName>>>           | <<<String>>>         | The file name of the (HTML) document being rendered, relative to the document being rendered. |
*---------------------------------+----------------------+-------------------------------+
| <<<decoration>>>                | {{{../doxia-site-model/apidocs/org/apache/maven/doxia/site/SiteModel.html}<<<SiteModel>>>}} | <<Deprecated>>}: use <<<site>>>. |
*---------------------------------+----------------------+-------------------------------+
| <<<currentFileName>>>           | <<<String>>>         | The file name of the (HTML) document being rendered, relative to the site root. |
*---------------------------------+----------------------+-------------------------------+
| <<<doxiaSiteRendererVersion>>>  | <<<String>>>         | The version of the Doxia Site Renderer in use. |
*---------------------------------+----------------------+-------------------------------+
| <<<locale>>>                    | <<<Locale>>>         | The locale for the document being rendered. |
*---------------------------------+----------------------+-------------------------------+
| <<<publishDate>>>               | <<<Date>>>           | An optional hardcoded publish date that has been set programmatically. |
*---------------------------------+----------------------+-------------------------------+
| <<<relativePath>>>              | <<<String>>>         | The path to the site root from the document being rendered. |
*---------------------------------+----------------------+-------------------------------+
| <<<site>>>                      | {{{../doxia-site-model/apidocs/org/apache/maven/doxia/site/SiteModel.html}<<<SiteModel>>>}} | This is a model that represents the data in your {{{../doxia-site-model/site.html}<<<site.xml>>>}}. |
*---------------------------------+----------------------+-------------------------------+
| <<<supportedLocales>>>          | <<<List\<Locale\>>>> | The list of locales that the site will contain. |
*---------------------------------+----------------------+-------------------------------+

  There are also some tools for general use:

#set( $plexus = "https://codehaus-plexus.github.io/plexus-utils/apidocs/org/codehaus/plexus/util" )
*---------------------------------+------------------------------------------------------+-------------------------------+
|| Variable                       || Type                                                || Description                 ||
*---------------------------------+------------------------------------------------------+-------------------------------+
| <<<PathTool>>>                  | {{{$plexus/PathTool.html}<<<PathTool>>>}}            |                               |
*---------------------------------+------------------------------------------------------+-------------------------------+
| <<<StringUtils>>>               | {{{$plexus/StringUtils.html}<<<StringUtils>>>}}      |                               |
*---------------------------------+------------------------------------------------------+-------------------------------+
| <<<plexus>>>                    | {{{https://github.com/eclipse/sisu.plexus/blob/master/org.eclipse.sisu.plexus/src/org/codehaus/plexus/PlexusContainer.java}<<<PlexusContainer>>>}} |  |
*---------------------------------+------------------------------------------------------+-------------------------------+

  Additionally, there are {{{https://velocity.apache.org/tools/${velocityToolsVersion}/tools-summary.html} Velocity Generic Tools}} populated
  with the site locale, the site model's date format, and site renderer's resource bundle:

#set( $generic = "https://velocity.apache.org/tools/${velocityToolsVersion}/tools-summary.html" )
*------------------+---------------------------------------------------------------+-------------------------------+
|| Variable        || Type                                                         || Description                 ||
*------------------+---------------------------------------------------------------+-------------------------------+
| <<<alternator>>> | {{{$generic${esc.hash}deprecated-tools}AlternatorTool}}       | {{{$generic${esc.hash}deprecated-tools}<<Deprecated>>}}: use CSS3 nth-child(even/odd) selectors or ${esc.hash}if($foreach.index % 2). For creating alternators to easily alternate over a set of values.
*------------------+---------------------------------------------------------------+-------------------------------+
| <<<class>>>      | {{{$generic${esc.hash}ClassTool}ClassTool}}                   | For simplifying reflective lookup of information about classes and their fields, methods and constructors.
*------------------+---------------------------------------------------------------+-------------------------------+
| <<<context>>>    | {{{$generic${esc.hash}ContextTool}ContextTool}}               | For convenient access to context data and metadata.
*------------------+---------------------------------------------------------------+-------------------------------+
| <<<convert>>>    | {{{$generic${esc.hash}deprecated-tools}ConversionTool}}       | {{{$generic${esc.hash}deprecated-tools}<<Deprecated>>}}: use NumberTool for numbers formatting/parsing, DateTool for date/time formatting/parsing, or CollectionTool for toStrings(). For converting String values to richer object Types.
*------------------+---------------------------------------------------------------+-------------------------------+
| <<<date>>>       | {{{$generic${esc.hash}ComparisonDateTool}ComparisonDateTool}} | For manipulating, formatting, and comparing dates.
*------------------+---------------------------------------------------------------+-------------------------------+
| <<<display>>>    | {{{$generic${esc.hash}DisplayTool}DisplayTool}}               | For controlling display of references (e.g., truncating values, "pretty printing" lists, and displaying alternates when a reference is null).
*------------------+---------------------------------------------------------------+-------------------------------+
| <<<esc>>>        | {{{$generic${esc.hash}EscapeTool}EscapeTool}}                 | For common escaping needs in Velocity templates (e.g. escaping html, xml, javascript etc.).
*------------------+---------------------------------------------------------------+-------------------------------+
| <<<field>>>      | {{{$generic${esc.hash}FieldTool}FieldTool}}                   | For (easy) access to static fields in a class, such as string constants.
*------------------+---------------------------------------------------------------+-------------------------------+
| <<<link>>>       | {{{$generic${esc.hash}LinkTool}LinkTool}}                     | For creating and manipulating URIs and URLs. The API for this tool is designed to closely resemble that of the VelocityView tool of the same name.
*------------------+---------------------------------------------------------------+-------------------------------+
| <<<loop>>>       | {{{$generic${esc.hash}LoopTool}LoopTool}}                     | A convenience tool to use with <<<${esc.hash}foreach>>> loops. It wraps a list with a custom iterator to provide greater control, allowing loops to end early, skip ahead and more.
*------------------+---------------------------------------------------------------+-------------------------------+
| <<<math>>>       | {{{$generic${esc.hash}MathTool}MathTool}}                     | For performing math functions.
*------------------+---------------------------------------------------------------+-------------------------------+
| <<<number>>>     | {{{$generic${esc.hash}NumberTool}NumberTool}}                 | For formatting and converting numbers.
*------------------+---------------------------------------------------------------+-------------------------------+
| <<<render>>>     | {{{$generic${esc.hash}RenderTool}RenderTool}}                 | To evaluate and render arbitrary strings of VTL, including recursive rendering.
*------------------+---------------------------------------------------------------+-------------------------------+
| <<<text>>>       | {{{$generic${esc.hash}ResourceTool}ResourceTool}}             | For simplified access to resource bundles for internationalization or other dynamic content needs.
*------------------+---------------------------------------------------------------+-------------------------------+
| <<<sorter>>>     | {{{$generic${esc.hash}deprecated-tools}SortTool}}             | {{{$generic${esc.hash}deprecated-tools}<<Deprecated>>}}: use CollectionTool sort methods. Used to sort collections (or arrays, iterators, etc) on any arbitary set of properties exposed by the objects contained within the collection.
*------------------+---------------------------------------------------------------+-------------------------------+
| <<<xml>>>        | {{{$generic${esc.hash}XmlTool}XmlTool}}                       | For reading/navigating XML files. This uses dom4j under the covers and provides complete XPath support.
*------------------+---------------------------------------------------------------+-------------------------------+

  If you intend to use custom Velocity tools, add them to the Maven Site Plugin's dependency list and make sure
  that they have a bundled configuration file in <<</META-INF/maven/site-tools.xml>>>.

  See <<<{{{./xref/org/apache/maven/doxia/siterenderer/DefaultSiteRenderer.html${esc.hash}L483}DefaultSiteRenderer.createToolManagedVelocityContext(...)}}>>>
  source for more details and the {{{https://velocity.apache.org/tools/devel/tools-summary.html}tools usage summary}}.

** Maven Site Plugin

  When <<<doxia-site-renderer>>> is used by <<<maven-site-plugin>>>, the following template properties are defined:

*---------------------------------+----------------------+-------------------------------+
|| Variable                       || Type                || Description                 ||
*---------------------------------+----------------------+-------------------------------+
| <<<inputEncoding>>>             | <<<String>>>         |                               |
*---------------------------------+----------------------+-------------------------------+
| <<<outputEncoding>>>            | <<<String>>>         |                               |
*---------------------------------+----------------------+-------------------------------+
| <<<project>>>                   | {{{/ref/current/maven-core/apidocs/org/apache/maven/project/MavenProject.html}<<<MavenProject>>>}} | The current project. |
*---------------------------------+----------------------+-------------------------------+
| <project properties>            | <<<String>>>         | Properties defined in POM are directly available. |
*---------------------------------+----------------------+-------------------------------+

  See <<<{{{/plugins/maven-site-plugin/apidocs/org/apache/maven/plugins/site/render/AbstractSiteRenderingMojo.html${esc.hash}createSiteRenderingContext(java.util.Locale)}AbstractSiteRenderingMojo.createSiteRenderingContext(...)}}>>>
  source for more details.

** Site Template

  When Velocity is processing the site template (be it from skin or local template), there are a few complementary variables
  available that give access to information taken from document being merged into the template:

*---------------------------------+----------------------+-------------------------------+
|| Variable                       || Type                || Description                 ||
*---------------------------------+----------------------+-------------------------------+
| <<<authors>>>                   | <<<List\<String\>>>> | A list of authors from the source document. |
*---------------------------------+----------------------+-------------------------------+
| <<<bodyContent>>>               | <<<String>>>         | HTML body content of the Doxia generated output. |
*---------------------------------+----------------------+-------------------------------+
| <<<documentDate>>>              | <<<String>>>         | The date specified in the source document: semantics has to be chosen by document writer (document creation date, or document last modification date, or ...), and format is not enforced. |
*---------------------------------+----------------------+-------------------------------+
| <<<headContent>>>               | <<<String>>>         | HTML head content of the Doxia generated output. |
*---------------------------------+----------------------+-------------------------------+
| <<<shortTitle>>>                | <<<String>>>         | The title of the document, excluding the project or site name. |
*---------------------------------+----------------------+-------------------------------+
| <<<title>>>                     | <<<String>>>         | The title of the document, including the project or site name. |
*---------------------------------+----------------------+-------------------------------+
| <<<docRenderingContext>>>       | {{{./apidocs/org/apache/maven/doxia/siterenderer/RenderingContext.html}<<<RenderingContext>>>}} | (since 1.8) The document rendering context. |
*---------------------------------+----------------------+-------------------------------+

  See <<<{{{./xref/org/apache/maven/doxia/siterenderer/DefaultSiteRenderer.html${esc.hash}L616}DefaultSiteRenderer.createSiteTemplateVelocityContext(...)}}>>>
  source for more details.