X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=man%2Fcustom-html.xsl;h=5ee5d228c9981247d2eff30465121934668df7e6;hb=86e97d599f8b1ca379dce64fadac9b8f6b002ac5;hp=c612baf4d808814c76964e19c7cf058c2f5b6af2;hpb=2cc8d9731aff3e401bc6a5a243f20fec123d48e6;p=elogind.git

diff --git a/man/custom-html.xsl b/man/custom-html.xsl
index c612baf4d..5ee5d228c 100644
--- a/man/custom-html.xsl
+++ b/man/custom-html.xsl
@@ -22,9 +22,19 @@
 <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">
 
 <xsl:import href="http://docbook.sourceforge.net/release/xsl/current/html/docbook.xsl"/>
+<!--
+  - The docbook stylesheet injects empty anchor tags into generated HTML, identified by an auto-generated ID.
+  - Ask the docbook stylesheet to generate reproducible output when generating (these) ID values.
+  - This makes the output of this stylesheet reproducible across identical invocations on the same input,
+  - which is an easy and significant win for achieving reproducible builds.
+  -
+  - It may be even better to strip the empty anchors from the document output in addition to turning on consistent IDs,
+  - for this stylesheet contains its own custom ID logic (for generating permalinks) already.
+ -->
+<xsl:param name="generate.consistent.ids" select="1"/>
 
 <!-- translate man page references to links to html pages -->
-<xsl:template match="citerefentry">
+<xsl:template match="citerefentry[not(@project)]">
   <a>
     <xsl:attribute name="href">
       <xsl:value-of select="refentrytitle"/><xsl:text>.html</xsl:text>
@@ -33,41 +43,248 @@
   </a>
 </xsl:template>
 
-<!-- add Index link at top of page -->
-<xsl:template name="user.header.content">
+<xsl:template match="citerefentry[@project='man-pages'] | citerefentry[manvolnum='2'] | citerefentry[manvolnum='4']">
   <a>
     <xsl:attribute name="href">
-      <xsl:text>index.html</xsl:text>
+      <xsl:text>http://man7.org/linux/man-pages/man</xsl:text>
+      <xsl:value-of select="manvolnum"/>
+      <xsl:text>/</xsl:text>
+      <xsl:value-of select="refentrytitle"/>
+      <xsl:text>.</xsl:text>
+      <xsl:value-of select="manvolnum"/>
+      <xsl:text>.html</xsl:text>
     </xsl:attribute>
-    <xsl:text>Index </xsl:text>
-  </a>·
+    <xsl:call-template name="inline.charseq"/>
+  </a>
+</xsl:template>
+
+<xsl:template match="citerefentry[@project='die-net']">
+  <a>
+    <xsl:attribute name="href">
+      <xsl:text>http://linux.die.net/man/</xsl:text>
+      <xsl:value-of select="manvolnum"/>
+      <xsl:text>/</xsl:text>
+      <xsl:value-of select="refentrytitle"/>
+    </xsl:attribute>
+    <xsl:call-template name="inline.charseq"/>
+  </a>
+</xsl:template>
+
+<xsl:template match="citerefentry[@project='mankier']">
   <a>
     <xsl:attribute name="href">
-      <xsl:text>systemd.directives.html</xsl:text>
+      <xsl:text>https://www.mankier.com/</xsl:text>
+      <xsl:value-of select="manvolnum"/>
+      <xsl:text>/</xsl:text>
+      <xsl:value-of select="refentrytitle"/>
     </xsl:attribute>
-    <xsl:text>Directives </xsl:text>
-  </a>·
+    <xsl:call-template name="inline.charseq"/>
+  </a>
+</xsl:template>
+
+<xsl:template match="citerefentry[@project='archlinux']">
   <a>
     <xsl:attribute name="href">
-      <xsl:text>../python-systemd/index.html</xsl:text>
+      <xsl:text>https://www.archlinux.org/</xsl:text>
+      <xsl:value-of select="refentrytitle"/>
+      <xsl:text>/</xsl:text>
+      <xsl:value-of select="refentrytitle"/>
+      <xsl:text>.</xsl:text>
+      <xsl:value-of select="manvolnum"/>
+      <xsl:text>.html</xsl:text>
     </xsl:attribute>
-    <xsl:text>Python </xsl:text>
-  </a>·
+    <xsl:call-template name="inline.charseq"/>
+  </a>
+</xsl:template>
+
+<xsl:template match="citerefentry[@project='freebsd']">
   <a>
     <xsl:attribute name="href">
-      <xsl:text>../libudev/index.html</xsl:text>
+      <xsl:text>https://www.freebsd.org/cgi/man.cgi?</xsl:text>
+      <xsl:value-of select="refentrytitle"/>
+      <xsl:text>(</xsl:text>
+      <xsl:value-of select="manvolnum"/>
+      <xsl:text>)</xsl:text>
     </xsl:attribute>
-    <xsl:text>libudev </xsl:text>
-  </a>·
+    <xsl:call-template name="inline.charseq"/>
+  </a>
+</xsl:template>
+
+<xsl:template match="citerefentry[@project='dbus']">
   <a>
     <xsl:attribute name="href">
-      <xsl:text>../libudev/index.html</xsl:text>
+      <xsl:text>http://dbus.freedesktop.org/doc/</xsl:text>
+      <xsl:value-of select="refentrytitle"/>
+      <xsl:text>.</xsl:text>
+      <xsl:value-of select="manvolnum"/>
+      <xsl:text>.html</xsl:text>
     </xsl:attribute>
-    <xsl:text>gudev </xsl:text>
+    <xsl:call-template name="inline.charseq"/>
   </a>
+</xsl:template>
+
+<!--
+  - helper template to do conflict resolution between various headings with the same inferred ID attribute/tag from the headerlink template
+  - this conflict resolution is necessary to prevent malformed HTML output (multiple id attributes with the same value)
+  - and it fixes xsltproc warnings during compilation of HTML man pages
+  -
+  - A simple top-to-bottom numbering scheme is implemented for nodes with the same ID value to derive unique ID values for HTML output.
+  - It uses two parameters:
+      templateID  the proposed ID string to use which must be checked for conflicts
+      keyNode     the context node which 'produced' the given templateID.
+  -
+  - Conflicts are detected solely based on keyNode, templateID is not taken into account for that purpose.
+ -->
+<xsl:template name="generateID">
+  <!-- node which generatedID needs to assume as the 'source' of the ID -->
+  <xsl:param name="keyNode"/>
+  <!-- suggested value for generatedID output, a contextually meaningful ID string -->
+  <xsl:param name="templateID"/>
+  <xsl:variable name="conflictSource" select="preceding::refsect1/title|preceding::refsect1/info/title|
+					      preceding::refsect2/title|preceding::refsect2/info/title|
+					      preceding::varlistentry/term[1]"/>
+  <xsl:variable name="conflictCount" select="count($conflictSource[. = $keyNode])"/>
+  <xsl:choose>
+    <!-- special case conflictCount = 0 to preserve compatibility with URLs generated by previous versions of this XSL stylesheet where possible -->
+    <xsl:when test="$conflictCount = 0">
+      <xsl:value-of select="$templateID"/>
+    </xsl:when>
+    <xsl:otherwise>
+      <xsl:value-of select="concat($templateID, $conflictCount)"/>
+    </xsl:otherwise>
+  </xsl:choose>
+</xsl:template>
+
+<!--
+  - a helper template to abstract over the structure of generated subheading + permalink HTML output
+  - It helps reduce tedious repetition and groups all actual markup output (as opposed to URL/ID logic) in a single location.
+ -->
+<xsl:template name="permalink">
+  <xsl:param name="nodeType"/> <!-- local name of the element node to generate, e.g. 'h2' for <h2></h2> -->
+  <xsl:param name="nodeContent"/> <!-- nodeset to apply further templates to obtain the content of the subheading/term -->
+  <xsl:param name="linkTitle"/> <!-- value for title attribute of generated permalink, e.g. 'this is a permalink' -->
+
+  <!-- parameters passed to generateID template, otherwise unused. -->
+  <xsl:param name="keyNode"/>
+  <xsl:param name="templateID"/>
+
+  <!--
+    - If stable URLs with fragment markers (references to the ID) turn out not to be important:
+    - generatedID could simply take the value of generate-id(), and various other helper templates may be dropped entirely.
+    - Alternatively if xsltproc is patched to generate reproducible generate-id() output the same simplifications can be
+    - applied at the cost of breaking compatibility with URLs generated from output of previous versions of this stylesheet.
+   -->
+  <xsl:variable name="generatedID">
+    <xsl:call-template name="generateID">
+      <xsl:with-param name="keyNode" select="$keyNode"/>
+      <xsl:with-param name="templateID" select="$templateID"/>
+    </xsl:call-template>
+  </xsl:variable>
+
+  <xsl:element name="{$nodeType}">
+    <xsl:attribute name="id">
+      <xsl:value-of select="$generatedID"/>
+    </xsl:attribute>
+    <xsl:apply-templates select="$nodeContent"/>
+    <a class="headerlink" title="{$linkTitle}" href="#{$generatedID}">¶</a>
+  </xsl:element>
+</xsl:template>
+
+<!-- simple wrapper around permalink to avoid repeating common info for each level of subheading covered by the permalink logic (h2, h3) -->
+<xsl:template name="headerlink">
+  <xsl:param name="nodeType"/>
+  <xsl:call-template name="permalink">
+    <xsl:with-param name="nodeType" select="$nodeType"/>
+    <xsl:with-param name="linkTitle" select="'Permalink to this headline'"/>
+    <xsl:with-param name="nodeContent" select="node()"/>
+    <xsl:with-param name="keyNode" select="."/>
+    <!--
+      - To retain compatibility with IDs generated by previous versions of the template, inline.charseq must be called.
+      - The purpose of that template is to generate markup (according to docbook documentation its purpose is to mark/format something as plain text).
+      - The only reason to call this template is to get the auto-generated text such as brackets ([]) before flattening it.
+     -->
+    <xsl:with-param name="templateID">
+      <xsl:call-template name="inline.charseq"/>
+    </xsl:with-param>
+  </xsl:call-template>
+</xsl:template>
+
+<xsl:template match="refsect1/title|refsect1/info/title">
+  <!-- the ID is output in the block.object call for refsect1 -->
+  <xsl:call-template name="headerlink">
+    <xsl:with-param name="nodeType" select="'h2'"/>
+  </xsl:call-template>
+</xsl:template>
+
+<xsl:template match="refsect2/title|refsect2/info/title">
+  <xsl:call-template name="headerlink">
+    <xsl:with-param name="nodeType" select="'h3'"/>
+  </xsl:call-template>
+</xsl:template>
+
+<xsl:template match="varlistentry">
+  <xsl:call-template name="permalink">
+    <xsl:with-param name="nodeType" select="'dt'"/>
+    <xsl:with-param name="linkTitle" select="'Permalink to this term'"/>
+    <xsl:with-param name="nodeContent" select="term"/>
+    <xsl:with-param name="keyNode" select="term[1]"/>
+    <!--
+      - To retain compatibility with IDs generated by previous versions of the template, inline.charseq must be called.
+      - The purpose of that template is to generate markup (according to docbook documentation its purpose is to mark/format something as plain text).
+      - The only reason to call this template is to get the auto-generated text such as brackets ([]) before flattening it.
+     -->
+    <xsl:with-param name="templateID">
+      <xsl:call-template name="inline.charseq">
+	<xsl:with-param name="content" select="term[1]"/>
+      </xsl:call-template>
+    </xsl:with-param>
+  </xsl:call-template>
+  <dd>
+    <xsl:apply-templates select="listitem"/>
+  </dd>
+</xsl:template>
+
+
+<!-- add Index link at top of page -->
+<xsl:template name="user.header.content">
+  <style>
+    a.headerlink {
+      color: #c60f0f;
+      font-size: 0.8em;
+      padding: 0 4px 0 4px;
+      text-decoration: none;
+      visibility: hidden;
+    }
+
+    a.headerlink:hover {
+      background-color: #c60f0f;
+      color: white;
+    }
+
+    h1:hover > a.headerlink, h2:hover > a.headerlink, h3:hover > a.headerlink, dt:hover > a.headerlink {
+      visibility: visible;
+    }
+  </style>
+
+  <a>
+    <xsl:attribute name="href">
+      <xsl:text>index.html</xsl:text>
+    </xsl:attribute>
+    <xsl:text>Index </xsl:text>
+
+  <span style="float:right">
+    <xsl:text>elogind </xsl:text>
+    <xsl:value-of select="$elogind.version"/>
+  </span>
   <hr/>
 </xsl:template>
 
+<xsl:template match="literal">
+  <xsl:text>"</xsl:text>
+  <xsl:call-template name="inline.monoseq"/>
+  <xsl:text>"</xsl:text>
+</xsl:template>
+
 <!-- Switch things to UTF-8, ISO-8859-1 is soo yesteryear -->
 <xsl:output method="html" encoding="UTF-8" indent="no"/>