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added documentation tree git-svn-id: https://ssl.bulix.org/svn/lcd4linux/trunk@458 3ae390bd-cb1e-0410-b409-cd5a39f66f1f
103 lines
6.2 KiB
XML
103 lines
6.2 KiB
XML
<?xml version="1.0" encoding="UTF-8" standalone="no" ?>
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<?xml-stylesheet type="text/xsl" href="../xsl/doc.xsl"?>
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<!DOCTYPE doc SYSTEM "../dtd/doc.dtd">
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<doc>
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<head>
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<title>How to write documentation for &l4l; ?</title>
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<ref>write_doc</ref>
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<!-- <links>
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<link ref="i2c_sensors"/>
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</links>-->
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</head>
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<body>
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<h2>Overview</h2>
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<p>The &l4l; documentation is composed of XML files which are processed with XSL stylesheets to produce XHTML files.
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There these XML files are writen in a syntax similar to the HTML syntax, plus some helpers.</p>
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<p>The whole documentation is generated through a make system, which uses <tt>xmllint</tt> to check the validy of the xml files and <tt>xsltproc</tt> to process them and generate the XHTML pages. <i>These two programs are mandatory</i></p>
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<h2>The syntax</h2>
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A doc page looks like this :
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<conf><?xml version="1.0" encoding="UTF-8" standalone="no" ?>
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<?xml-stylesheet type="text/xsl" href="../xsl/doc.xsl"?>
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<!DOCTYPE doc SYSTEM "../dtd/doc.dtd">
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<doc>
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<head>
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<title>How to write documentation for &l4l; ?</title>
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<ref>write_doc</ref>
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<links>
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<link ref="http://lcd4linux.sf.net"/>
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</links>
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</head>
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<body>
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...
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</body>
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</doc>
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</conf>
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<li>The three first lines are the preambule of the file, don't touch them.</li>
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<li>The root of the document is <tt><doc></tt>, it's the equivalent of <html>.</li>
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<li>Then, there's a <tt><head></tt> node, containing the information about the page. See later for the childs.</li>
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<li>The core of the doc is the <body> node, like in HTML, containing the content.</li>
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<h3>The <head></h3>
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The head contains some information about the document :
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<li><title> is the title of the document, which will be displayed as a <h1></li>
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<li><ref> is a unique reference for the document, which is assumed to be the same as in <i>references.xml</i> (we'll discuss later about this file)</li>
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<li><links> is the section responsible of the "See Alo" box, containing links to other help pages, or to urls. It can contain several <link> elements, whose syntax is explained in the next part.</li>
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<li>There may be other elements, but we'll only use these ones for now.</li>
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<h3>The helpers</h3>
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You can use a lot of helpers in the body :
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<li><link> is a helper to create links. It is used with one of these two arguments :
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<ul>
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<li><tt><link ref="xxx"/></tt> will create a link to the documentation page associated with this reference (defined in <i>references.xml</i>)</li>
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<li><tt><link url="http://..."/></tt> will create a link to the url</li>
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</ul>
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Note that if you don't provide a text, the text of the link will be the label of the reference or the url. You can specify a text writing <tt><link url="http://...">TEXT</link></tt>
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</li>
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<warn>As this is XML, you <b>must</b> close all the tags you open, or use self-closing tags for empty ones :<br/>For example, you have to write <tt><br/></tt> but not <tt><br>.</tt></warn>
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<li><cmd> Opens a box with write text on black background, used to indicate something's happening in a console (compilation, logs, ...). The text is in "pre" mode, so spaces and newlines are kept, no need of &nbsp; or <br/>, <b>But beware of < and ></b> (you must replace them with &lt; and &gt;)</li>
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<cmd>xav:~$ echo "An example of <cmd> box"
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An example of <cmd> box
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xav:~$
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</cmd>
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<li><conf> works like <cmd> but with black text on grey background, to print lcd4linux.conf examples.</li>
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<conf>Widget Lightning {
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class 'icon'
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speed 100
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visible cpu('busy', 500)-50
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bitmap {
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row1 '...***'
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row2 '..***.'
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row3 '.***..'
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row4 '.****.'
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row5 '..**..'
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row6 '.**...'
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row7 '**....'
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row8 '*.....'
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}
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}</conf>
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<li><note> is to display a box with a small icon, to point out a detail, or an advice</li>
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<note>To dry a wet cat, don't put it in a microwave ;)</note>
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<li><warn> works like <note> but with a red exclamation mark and a red border, to display warnings. In general, use a note for a detail or an advice and warn to point configuration problems, hardware hazards, or other happy things ;)</li>
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<warn>We're not responsible for damages caused to your microwave if you don't read the above note !</warn>
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<li><index> is a cool thing. It displays the list of pages of a specified class. It's used to display indexes. For example <index class="drivers"/> will display a list of all pages about drivers. If there's no class specified, it'll parse the list of pages of the "lcd4linux" class.</li>
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<li><new> is in the DTD, but is not yet implemented :/</li>
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<li>You can use any other XHTML-valid tag. The most used should be : <br/> <h2> <h3> <li> <b> <i> <tt> ...</li>
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<h3>references.xml</h3>
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There's a file in <tt>data/</tt> called <tt>references.xml</tt>. It isn't processed directly, but is used to parse links and indexes. It's syntax is quite straightforward, so I won't explain it.<br/>
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You must add a new entry in it for each page you write so that other pages can have links to it and index it.
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<note>A null <class/> attribute corresponds to the lcd4linux class. It's not a bug, it's a feature, used to make links (the lcd4linux class is in the root of the documentation)</note>
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<h2>The compilation system</h2>
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The documentation is compiled with a Makefile build system. There's a toplevel Makefile which calls the apropriate targets in each subdirs which contains xml files (for the moment, <tt>lcd4linux</tt>, <tt>drivers</tt> and <tt>plugins</tt>). In these subdirs, the Makefile is a link to <tt>Makefile.generic</tt>.<br/>
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To compile the documentation, just type make at the toplevel, and look in the <tt>HTML</tt> folder. Type make help for help ;)
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<warn>Two programs are mandatory to build the documentation :
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<ul><li><tt>xmllint</tt> from libxml2 is used to validate the xml pages to be processed. It's in the debian package <tt>libxml2</tt></li>
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<li><tt>xsltproc</tt> from libxslt processes the xml files to generate the html pages. It's in the libxslt tarballs or in the <tt>xsltproc</tt> debian package</li></ul>
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</warn>
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</body>
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</doc>
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