man/custom-html.xsl

   1 <?xml version='1.0'?> <!--*-nxml-*-->
   2
   3 <!--
   4   SPDX-License-Identifier: LGPL-2.1+
   5
   6   Copyright 2011 Lennart Poettering
   7 -->
   8
   9 <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">
  10
  11 <xsl:import href="http://docbook.sourceforge.net/release/xsl/current/html/docbook.xsl"/>
  12 <!--
  13   - The docbook stylesheet injects empty anchor tags into generated HTML, identified by an auto-generated ID.
  14   - Ask the docbook stylesheet to generate reproducible output when generating (these) ID values.
  15   - This makes the output of this stylesheet reproducible across identical invocations on the same input,
  16   - which is an easy and significant win for achieving reproducible builds.
  17   -
  18   - It may be even better to strip the empty anchors from the document output in addition to turning on consistent IDs,
  19   - for this stylesheet contains its own custom ID logic (for generating permalinks) already.
  20  -->
  21 <xsl:param name="generate.consistent.ids" select="1"/>
  22
  23 <!-- translate man page references to links to html pages -->
  24 <xsl:template match="citerefentry[not(@project)]">
  25   <a>
  26     <xsl:attribute name="href">
  27       <xsl:value-of select="refentrytitle"/><xsl:text>.html#</xsl:text>
  28       <xsl:value-of select="refentrytitle/@target"/>
  29     </xsl:attribute>
  30     <xsl:call-template name="inline.charseq"/>
  31   </a>
  32 </xsl:template>
  33
  34 <xsl:template match="citerefentry[@project='man-pages'] | citerefentry[manvolnum='2'] | citerefentry[manvolnum='4']">
  35   <a>
  36     <xsl:attribute name="href">
  37       <xsl:text>http://man7.org/linux/man-pages/man</xsl:text>
  38       <xsl:value-of select="manvolnum"/>
  39       <xsl:text>/</xsl:text>
  40       <xsl:value-of select="refentrytitle"/>
  41       <xsl:text>.</xsl:text>
  42       <xsl:value-of select="manvolnum"/>
  43       <xsl:text>.html</xsl:text>
  44     </xsl:attribute>
  45     <xsl:call-template name="inline.charseq"/>
  46   </a>
  47 </xsl:template>
  48
  49 <xsl:template match="citerefentry[@project='die-net']">
  50   <a>
  51     <xsl:attribute name="href">
  52       <xsl:text>http://linux.die.net/man/</xsl:text>
  53       <xsl:value-of select="manvolnum"/>
  54       <xsl:text>/</xsl:text>
  55       <xsl:value-of select="refentrytitle"/>
  56     </xsl:attribute>
  57     <xsl:call-template name="inline.charseq"/>
  58   </a>
  59 </xsl:template>
  60
  61 <xsl:template match="citerefentry[@project='wireguard']">
  62   <a>
  63     <xsl:attribute name="href">
  64       <xsl:text>https://git.zx2c4.com/WireGuard/about/src/tools/</xsl:text>
  65       <xsl:value-of select="refentrytitle"/>
  66       <xsl:text>.</xsl:text>
  67       <xsl:value-of select="manvolnum"/>
  68     </xsl:attribute>
  69     <xsl:call-template name="inline.charseq"/>
  70   </a>
  71 </xsl:template>
  72
  73 <xsl:template match="citerefentry[@project='mankier']">
  74   <a>
  75     <xsl:attribute name="href">
  76       <xsl:text>https://www.mankier.com/</xsl:text>
  77       <xsl:value-of select="manvolnum"/>
  78       <xsl:text>/</xsl:text>
  79       <xsl:value-of select="refentrytitle"/>
  80     </xsl:attribute>
  81     <xsl:call-template name="inline.charseq"/>
  82   </a>
  83 </xsl:template>
  84
  85 <xsl:template match="citerefentry[@project='archlinux']">
  86   <a>
  87     <xsl:attribute name="href">
  88       <xsl:text>https://www.archlinux.org/</xsl:text>
  89       <xsl:value-of select="refentrytitle"/>
  90       <xsl:text>/</xsl:text>
  91       <xsl:value-of select="refentrytitle"/>
  92       <xsl:text>.</xsl:text>
  93       <xsl:value-of select="manvolnum"/>
  94       <xsl:text>.html</xsl:text>
  95     </xsl:attribute>
  96     <xsl:call-template name="inline.charseq"/>
  97   </a>
  98 </xsl:template>
  99
 100 <xsl:template match="citerefentry[@project='freebsd']">
 101   <a>
 102     <xsl:attribute name="href">
 103       <xsl:text>https://www.freebsd.org/cgi/man.cgi?</xsl:text>
 104       <xsl:value-of select="refentrytitle"/>
 105       <xsl:text>(</xsl:text>
 106       <xsl:value-of select="manvolnum"/>
 107       <xsl:text>)</xsl:text>
 108     </xsl:attribute>
 109     <xsl:call-template name="inline.charseq"/>
 110   </a>
 111 </xsl:template>
 112
 113 <xsl:template match="citerefentry[@project='dbus']">
 114   <a>
 115     <xsl:attribute name="href">
 116       <xsl:text>http://dbus.freedesktop.org/doc/</xsl:text>
 117       <xsl:value-of select="refentrytitle"/>
 118       <xsl:text>.</xsl:text>
 119       <xsl:value-of select="manvolnum"/>
 120       <xsl:text>.html</xsl:text>
 121     </xsl:attribute>
 122     <xsl:call-template name="inline.charseq"/>
 123   </a>
 124 </xsl:template>
 125
 126 <!--
 127   - helper template to do conflict resolution between various headings with the same inferred ID attribute/tag from the headerlink template
 128   - this conflict resolution is necessary to prevent malformed HTML output (multiple ID attributes with the same value)
 129   - and it fixes xsltproc warnings during compilation of HTML man pages
 130   -
 131   - A simple top-to-bottom numbering scheme is implemented for nodes with the same ID value to derive unique ID values for HTML output.
 132   - It uses two parameters:
 133       templateID  the proposed ID string to use which must be checked for conflicts
 134       keyNode     the context node which 'produced' the given templateID.
 135   -
 136   - Conflicts are detected solely based on keyNode, templateID is not taken into account for that purpose.
 137  -->
 138 <xsl:template name="generateID">
 139   <!-- node which generatedID needs to assume as the 'source' of the ID -->
 140   <xsl:param name="keyNode"/>
 141   <!-- suggested value for generatedID output, a contextually meaningful ID string -->
 142   <xsl:param name="templateID"/>
 143   <xsl:variable name="conflictSource" select="preceding::refsect1/title|preceding::refsect1/info/title|
 144                                               preceding::refsect2/title|preceding::refsect2/info/title|
 145                                               preceding::varlistentry/term[1]"/>
 146   <xsl:variable name="conflictCount" select="count($conflictSource[. = $keyNode])"/>
 147   <xsl:choose>
 148     <!-- special case conflictCount = 0 to preserve compatibility with URLs generated by previous versions of this XSL stylesheet where possible -->
 149     <xsl:when test="$conflictCount = 0">
 150       <xsl:value-of select="$templateID"/>
 151     </xsl:when>
 152     <xsl:otherwise>
 153       <xsl:value-of select="concat($templateID, $conflictCount)"/>
 154     </xsl:otherwise>
 155   </xsl:choose>
 156 </xsl:template>
 157
 158 <!--
 159   - a helper template to abstract over the structure of generated subheading + permalink HTML output
 160   - It helps reduce tedious repetition and groups all actual markup output (as opposed to URL/ID logic) in a single location.
 161  -->
 162 <xsl:template name="permalink">
 163   <xsl:param name="nodeType"/> <!-- local name of the element node to generate, e.g. 'h2' for <h2></h2> -->
 164   <xsl:param name="nodeContent"/> <!-- nodeset to apply further templates to obtain the content of the subheading/term -->
 165   <xsl:param name="linkTitle"/> <!-- value for title attribute of generated permalink, e.g. 'this is a permalink' -->
 166
 167   <!-- parameters passed to generateID template, otherwise unused. -->
 168   <xsl:param name="keyNode"/>
 169   <xsl:param name="templateID"/>
 170
 171   <!--
 172     - If stable URLs with fragment markers (references to the ID) turn out not to be important:
 173     - generatedID could simply take the value of generate-id(), and various other helper templates may be dropped entirely.
 174     - Alternatively, if xsltproc is patched to generate reproducible generate-id() output, the same simplifications can be
 175     - applied at the cost of breaking compatibility with URLs generated from output of previous versions of this stylesheet.
 176    -->
 177   <xsl:variable name="generatedID">
 178     <xsl:call-template name="generateID">
 179       <xsl:with-param name="keyNode" select="$keyNode"/>
 180       <xsl:with-param name="templateID" select="$templateID"/>
 181     </xsl:call-template>
 182   </xsl:variable>
 183
 184   <xsl:element name="{$nodeType}">
 185     <xsl:attribute name="id">
 186       <xsl:value-of select="$generatedID"/>
 187     </xsl:attribute>
 188     <xsl:apply-templates select="$nodeContent"/>
 189     <a class="headerlink" title="{$linkTitle}" href="#{$generatedID}">¶</a>
 190   </xsl:element>
 191 </xsl:template>
 192
 193 <!-- simple wrapper around permalink to avoid repeating common info for each level of subheading covered by the permalink logic (h2, h3) -->
 194 <xsl:template name="headerlink">
 195   <xsl:param name="nodeType"/>
 196   <xsl:call-template name="permalink">
 197     <xsl:with-param name="nodeType" select="$nodeType"/>
 198     <xsl:with-param name="linkTitle" select="'Permalink to this headline'"/>
 199     <xsl:with-param name="nodeContent" select="node()"/>
 200     <xsl:with-param name="keyNode" select="."/>
 201     <!--
 202       - To retain compatibility with IDs generated by previous versions of the template, inline.charseq must be called.
 203       - The purpose of that template is to generate markup (according to docbook documentation its purpose is to mark/format something as plain text).
 204       - The only reason to call this template is to get the auto-generated text such as brackets ([]) before flattening it.
 205      -->
 206     <xsl:with-param name="templateID">
 207       <xsl:call-template name="inline.charseq"/>
 208     </xsl:with-param>
 209   </xsl:call-template>
 210 </xsl:template>
 211
 212 <xsl:template match="refsect1/title|refsect1/info/title">
 213   <!-- the ID is output in the block.object call for refsect1 -->
 214   <xsl:call-template name="headerlink">
 215     <xsl:with-param name="nodeType" select="'h2'"/>
 216   </xsl:call-template>
 217 </xsl:template>
 218
 219 <xsl:template match="refsect2/title|refsect2/info/title">
 220   <xsl:call-template name="headerlink">
 221     <xsl:with-param name="nodeType" select="'h3'"/>
 222   </xsl:call-template>
 223 </xsl:template>
 224
 225 <xsl:template match="varlistentry">
 226   <xsl:call-template name="permalink">
 227     <xsl:with-param name="nodeType" select="'dt'"/>
 228     <xsl:with-param name="linkTitle" select="'Permalink to this term'"/>
 229     <xsl:with-param name="nodeContent" select="term"/>
 230     <xsl:with-param name="keyNode" select="term[1]"/>
 231     <!--
 232       - To retain compatibility with IDs generated by previous versions of the template, inline.charseq must be called.
 233       - The purpose of that template is to generate markup (according to docbook documentation its purpose is to mark/format something as plain text).
 234       - The only reason to call this template is to get the auto-generated text such as brackets ([]) before flattening it.
 235      -->
 236     <xsl:with-param name="templateID">
 237       <xsl:call-template name="inline.charseq">
 238         <xsl:with-param name="content" select="term[1]"/>
 239       </xsl:call-template>
 240     </xsl:with-param>
 241   </xsl:call-template>
 242   <dd>
 243     <xsl:apply-templates select="listitem"/>
 244   </dd>
 245 </xsl:template>
 246
 247
 248 <!-- add Index link at top of page -->
 249 <xsl:template name="user.header.content">
 250   <style>
 251     a.headerlink {
 252       color: #c60f0f;
 253       font-size: 0.8em;
 254       padding: 0 4px 0 4px;
 255       text-decoration: none;
 256       visibility: hidden;
 257     }
 258
 259     a.headerlink:hover {
 260       background-color: #c60f0f;
 261       color: white;
 262     }
 263
 264     h1:hover > a.headerlink, h2:hover > a.headerlink, h3:hover > a.headerlink, dt:hover > a.headerlink {
 265       visibility: visible;
 266     }
 267   </style>
 268
 269   <a>
 270     <xsl:attribute name="href">
 271       <xsl:text>index.html</xsl:text>
 272     </xsl:attribute>
 273     <xsl:text>Index </xsl:text>
 274   </a>·
 275   <a>
 276     <xsl:attribute name="href">
 277       <xsl:text>systemd.directives.html</xsl:text>
 278     </xsl:attribute>
 279     <xsl:text>Directives </xsl:text>
 280   </a>
 281
 282   <span style="float:right">
 283     <xsl:text>systemd </xsl:text>
 284     <xsl:value-of select="$systemd.version"/>
 285   </span>
 286   <hr/>
 287 </xsl:template>
 288
 289 <xsl:template match="literal">
 290   <xsl:text>"</xsl:text>
 291   <xsl:call-template name="inline.monoseq"/>
 292   <xsl:text>"</xsl:text>
 293 </xsl:template>
 294
 295 <!-- Switch things to UTF-8, ISO-8859-1 is soo yesteryear -->
 296 <xsl:output method="html" encoding="UTF-8" indent="no"/>
 297
 298 </xsl:stylesheet>