From a2149e4f07188eef9ef9dd693e822bc24548ae09 Mon Sep 17 00:00:00 2001
From: Norman Walsh <ndw@nwalsh.com>
Date: Fri, 22 Jun 2001 12:33:07 +0000
Subject: [PATCH] Support EBNF

---
 xsl/fo/docbook.xsl   |   8 ++
 xsl/fo/ebnf.xsl      | 318 +++++++++++++++++++++++++++++++++++++++++++
 xsl/html/docbook.xsl |   1 +
 xsl/html/ebnf.xsl    |  41 +++---
 4 files changed, 345 insertions(+), 23 deletions(-)
 create mode 100644 xsl/fo/ebnf.xsl

diff --git a/xsl/fo/docbook.xsl b/xsl/fo/docbook.xsl
index 7f081a631..181b2aa22 100644
--- a/xsl/fo/docbook.xsl
+++ b/xsl/fo/docbook.xsl
@@ -59,8 +59,10 @@
 <xsl:include href="titlepage.templates.xsl"/>
 <xsl:include href="pagesetup.xsl"/>
 <xsl:include href="pi.xsl"/>
+<xsl:include href="ebnf.xsl"/>
 
 <xsl:include href="fop.xsl"/>
+<xsl:include href="xep.xsl"/>
 
 <!-- ==================================================================== -->
 
@@ -125,6 +127,9 @@
             <xsl:if test="$fop.extensions != 0">
               <xsl:apply-templates select="id($rootid)" mode="outline"/>
             </xsl:if>
+            <xsl:if test="$xep.extensions != 0">
+              <xsl:apply-templates select="id($rootid)" mode="xep.outline"/>
+            </xsl:if>
             <xsl:apply-templates select="id($rootid)"/>
           </xsl:otherwise>
         </xsl:choose>
@@ -133,6 +138,9 @@
         <xsl:if test="$fop.extensions != 0">
           <xsl:apply-templates mode="outline"/>
         </xsl:if>
+        <xsl:if test="$xep.extensions != 0">
+          <xsl:apply-templates mode="xep.outline"/>
+        </xsl:if>
         <xsl:apply-templates/>
       </xsl:otherwise>
     </xsl:choose>
diff --git a/xsl/fo/ebnf.xsl b/xsl/fo/ebnf.xsl
new file mode 100644
index 000000000..168060c68
--- /dev/null
+++ b/xsl/fo/ebnf.xsl
@@ -0,0 +1,318 @@
+<?xml version='1.0'?>
+<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
+                xmlns:fo="http://www.w3.org/1999/XSL/Format"
+                xmlns:doc="http://nwalsh.com/xsl/documentation/1.0"
+                exclude-result-prefixes="doc"
+                version='1.0'>
+
+<!-- ********************************************************************
+     $Id$
+     ********************************************************************
+
+     This file is part of the XSL DocBook Stylesheet distribution.
+     See ../README or http://nwalsh.com/docbook/xsl/ for copyright
+     and other information.
+
+     ******************************************************************** -->
+
+<doc:reference xmlns="">
+<referenceinfo>
+<releaseinfo role="meta">
+$Id$
+</releaseinfo>
+<author><surname>Walsh</surname>
+<firstname>Norman</firstname></author>
+<copyright><year>1999</year><year>2000</year><year>2001</year>
+<holder>Norman Walsh</holder>
+</copyright>
+</referenceinfo>
+<title>HTML EBNF Reference</title>
+
+<partintro>
+<section><title>Introduction</title>
+
+<para>This is technical reference documentation for the DocBook XSL
+Stylesheets; it documents (some of) the parameters, templates, and
+other elements of the stylesheets.</para>
+
+<para>This reference describes the templates and parameters relevant
+to formatting EBNF markup.</para>
+
+<para>This is not intended to be <quote>user</quote> documentation.
+It is provided for developers writing customization layers for the
+stylesheets, and for anyone who's interested in <quote>how it
+works</quote>.</para>
+
+<para>Although I am trying to be thorough, this documentation is known
+to be incomplete. Don't forget to read the source, too :-)</para>
+</section>
+</partintro>
+</doc:reference>
+
+<!-- ==================================================================== -->
+
+<xsl:template match="productionset">
+  <xsl:variable name="id"><xsl:call-template name="object.id"/></xsl:variable>
+
+  <xsl:choose>
+    <xsl:when test="title">
+      <fo:table-and-caption id="{$id}"
+                            xsl:use-attribute-sets="formal.object.properties">
+        <fo:table-caption>
+          <fo:block xsl:use-attribute-sets="formal.title.properties">
+            <xsl:apply-templates select="." mode="object.title.markup"/>
+          </fo:block>
+        </fo:table-caption>
+        <fo:table table-layout="fixed" width="100%">
+          <fo:table-body>
+            <xsl:apply-templates select="production|productionrecap"/>
+          </fo:table-body>
+        </fo:table>
+      </fo:table-and-caption>
+    </xsl:when>
+    <xsl:otherwise>
+      <fo:table table-layout="fixed" width="100%">
+        <fo:table-body>
+          <xsl:apply-templates select="production|productionrecap"/>
+        </fo:table-body>
+      </fo:table>
+    </xsl:otherwise>
+  </xsl:choose>
+</xsl:template>
+
+<xsl:template match="productionset/title">
+  <!-- suppressed -->
+</xsl:template>
+
+<xsl:template match="production">
+  <xsl:param name="recap" select="false()"/>
+  <xsl:variable name="id"><xsl:call-template name="object.id"/></xsl:variable>
+  <fo:table-row>
+    <fo:table-cell width="3%">
+      <fo:block text-align="start">
+        <xsl:text>[</xsl:text>
+        <xsl:number count="production" level="any"/>
+        <xsl:text>]</xsl:text>
+      </fo:block>
+    </fo:table-cell>
+    <fo:table-cell width="10%">
+      <fo:block text-align="end">
+        <xsl:choose>
+          <xsl:when test="$recap">
+            <fo:basic-link internal-destination="{$id}"
+                           xsl:use-attribute-sets="xref.properties">
+              <xsl:apply-templates select="lhs"/>
+            </fo:basic-link>
+          </xsl:when>
+          <xsl:otherwise>
+            <fo:wrapper id="{$id}">
+              <xsl:apply-templates select="lhs"/>
+            </fo:wrapper>
+          </xsl:otherwise>
+        </xsl:choose>
+      </fo:block>
+    </fo:table-cell>
+    <fo:table-cell width="5%">
+      <fo:block text-align="center">
+        <fo:inline font-family="{$monospace.font.family}">
+          <xsl:text>::=</xsl:text>
+        </fo:inline>
+      </fo:block>
+    </fo:table-cell>
+    <fo:table-cell width="52%">
+      <fo:block>
+        <xsl:apply-templates select="rhs"/>
+      </fo:block>
+    </fo:table-cell>
+    <fo:table-cell width="30%" border-start-width="3pt">
+      <fo:block text-align="start">
+        <xsl:choose>
+          <xsl:when test="rhs/lineannotation|constraint">
+            <xsl:apply-templates select="rhs/lineannotation" mode="rhslo"/>
+            <xsl:apply-templates select="constraint"/>
+          </xsl:when>
+          <xsl:otherwise>
+            <xsl:text>&#160;</xsl:text>
+          </xsl:otherwise>
+        </xsl:choose>
+      </fo:block>
+    </fo:table-cell>
+  </fo:table-row>
+</xsl:template>
+
+<xsl:template match="productionrecap">
+  <xsl:variable name="targets" select="id(@linkend)"/>
+  <xsl:variable name="target" select="$targets[1]"/>
+
+  <xsl:if test="count($targets)=0">
+    <xsl:message>
+      <xsl:text>Error: no ID for productionrecap linkend: </xsl:text>
+      <xsl:value-of select="@linkend"/>
+      <xsl:text>.</xsl:text>
+    </xsl:message>
+  </xsl:if>
+
+  <xsl:if test="count($targets)>1">
+    <xsl:message>
+      <xsl:text>Warning: multiple "IDs" for productionrecap linkend: </xsl:text>
+      <xsl:value-of select="@linkend"/>
+      <xsl:text>.</xsl:text>
+    </xsl:message>
+  </xsl:if>
+
+  <xsl:apply-templates select="$target">
+    <xsl:with-param name="recap" select="true()"/>
+  </xsl:apply-templates>
+</xsl:template>
+
+<xsl:template match="lhs">
+  <xsl:apply-templates/>
+</xsl:template>
+
+<xsl:template match="rhs">
+  <xsl:apply-templates/>
+</xsl:template>
+
+<xsl:template match="nonterminal">
+  <xsl:variable name="linkend">
+    <xsl:call-template name="xpointer.idref">
+      <xsl:with-param name="xpointer" select="@def"/>
+    </xsl:call-template>
+  </xsl:variable>
+
+  <xsl:call-template name="check.id.unique">
+    <xsl:with-param name="linkend" select="$linkend"/>
+  </xsl:call-template>
+
+  <xsl:call-template name="check.idref.targets">
+    <xsl:with-param name="linkend" select="$linkend"/>
+    <xsl:with-param name="element-list">production</xsl:with-param>
+  </xsl:call-template>
+
+  <!-- If you don't provide content, you can't point outside this doc. -->
+  <xsl:choose>
+    <xsl:when test="*|text()"><!--nop--></xsl:when>
+    <xsl:otherwise>
+      <xsl:if test="$linkend = ''">
+	<xsl:message>
+	  <xsl:text>Non-terminals with no content must point to </xsl:text>
+	  <xsl:text>production elements in the current document.</xsl:text>
+	</xsl:message>
+	<xsl:message>
+	  <xsl:text>Invalid xpointer for empty nt: </xsl:text>
+	  <xsl:value-of select="@def"/>
+	</xsl:message>
+      </xsl:if>
+    </xsl:otherwise>
+  </xsl:choose>
+
+  <xsl:variable name="href">
+    <xsl:choose>
+      <xsl:when test="$linkend != ''">
+	<xsl:variable name="targets" select="id($linkend)"/>
+	<xsl:variable name="target" select="$targets[1]"/>
+        <xsl:call-template name="object.id">
+          <xsl:with-param name="object" select="$target"/>
+        </xsl:call-template>
+      </xsl:when>
+      <xsl:otherwise>
+	<xsl:value-of select="@def"/>
+      </xsl:otherwise>
+    </xsl:choose>
+  </xsl:variable>
+
+  <fo:basic-link internal-destination="{$href}"
+                 xsl:use-attribute-sets="xref.properties">
+    <xsl:choose>
+      <xsl:when test="*|text()">
+        <xsl:apply-templates/>
+      </xsl:when>
+      <xsl:otherwise>
+        <xsl:choose>
+          <xsl:when test="$linkend != ''">
+            <xsl:variable name="targets" select="id($linkend)"/>
+            <xsl:variable name="target" select="$targets[1]"/>
+            <xsl:apply-templates select="$target/lhs"/>
+          </xsl:when>
+          <xsl:otherwise>
+            <xsl:text>???</xsl:text>
+          </xsl:otherwise>
+        </xsl:choose>
+      </xsl:otherwise>
+    </xsl:choose>
+  </fo:basic-link>
+</xsl:template>
+
+<xsl:template match="rhs/lineannotation">
+  <!--nop-->
+</xsl:template>
+
+<xsl:template match="rhs/lineannotation" mode="rhslo">
+  <xsl:text>/*&#160;</xsl:text>
+  <xsl:apply-templates/>
+  <xsl:text>&#160;*/</xsl:text>
+</xsl:template>
+
+<xsl:template match="constraint">
+  <xsl:call-template name="check.id.unique">
+    <xsl:with-param name="linkend" select="@linkend"/>
+  </xsl:call-template>
+
+  <xsl:call-template name="check.idref.targets">
+    <xsl:with-param name="linkend" select="@linkend"/>
+    <xsl:with-param name="element-list">constraintdef</xsl:with-param>
+  </xsl:call-template>
+
+  <xsl:variable name="href">
+    <xsl:variable name="targets" select="id(@linkend)"/>
+    <xsl:variable name="target" select="$targets[1]"/>
+    <xsl:call-template name="object.id">
+      <xsl:with-param name="object" select="$target"/>
+    </xsl:call-template>
+  </xsl:variable>
+
+  <xsl:if test="preceding-sibling::constraint">
+    <fo:inline linefeed-treatment="preserve">&#xA;</fo:inline>
+  </xsl:if>
+  <xsl:text>[&#160;</xsl:text>
+
+  <xsl:choose>
+    <xsl:when test="@role">
+      <xsl:value-of select="@role"/>
+      <xsl:text>: </xsl:text>
+    </xsl:when>
+    <xsl:otherwise>
+      <xsl:variable name="targets" select="id(@linkend)"/>
+      <xsl:variable name="target" select="$targets[1]"/>
+      <xsl:if test="$target/@role">
+	<xsl:value-of select="$target/@role"/>
+	<xsl:text>: </xsl:text>
+      </xsl:if>
+    </xsl:otherwise>
+  </xsl:choose>
+
+  <fo:basic-link internal-destination="{$href}"
+                 xsl:use-attribute-sets="xref.properties">
+    <xsl:variable name="targets" select="id(@linkend)"/>
+    <xsl:variable name="target" select="$targets[1]"/>
+    <xsl:apply-templates select="$target" mode="title.markup"/>
+  </fo:basic-link>
+  <xsl:text>&#160;]</xsl:text>
+</xsl:template>
+
+<xsl:template match="constraintdef">
+  <xsl:variable name="id"><xsl:call-template name="object.id"/></xsl:variable>
+  <fo:block id="{$id}">
+    <xsl:apply-templates/>
+  </fo:block>
+</xsl:template>
+
+<xsl:template match="constraintdef/title">
+  <fo:block font-weight="bold">
+    <xsl:apply-templates/>
+  </fo:block>
+</xsl:template>
+
+<!-- ==================================================================== -->
+
+</xsl:stylesheet>
diff --git a/xsl/html/docbook.xsl b/xsl/html/docbook.xsl
index df66280c3..54e335e3b 100644
--- a/xsl/html/docbook.xsl
+++ b/xsl/html/docbook.xsl
@@ -58,6 +58,7 @@
 <xsl:include href="titlepage.xsl"/>
 <xsl:include href="titlepage.templates.xsl"/>
 <xsl:include href="pi.xsl"/>
+<xsl:include href="ebnf.xsl"/>
 
 <!-- ==================================================================== -->
 
diff --git a/xsl/html/ebnf.xsl b/xsl/html/ebnf.xsl
index 598d577b4..1c75508bb 100644
--- a/xsl/html/ebnf.xsl
+++ b/xsl/html/ebnf.xsl
@@ -48,12 +48,6 @@ to be incomplete. Don't forget to read the source, too :-)</para>
 </partintro>
 </doc:reference>
 
-<!-- This module formats EBNF tables. The DTD that this supports is  -->
-<!-- under development by the DocBook community. This code is        -->
-<!-- experimental and is not (yet) part of the DocBook stylesheets.  -->
-
-<xsl:include href="docbook.xsl"/>
-
 <!-- ==================================================================== -->
 
 <xsl:param name="ebnf.table.bgcolor">#F5DCB3</xsl:param>
@@ -180,23 +174,22 @@ borders, otherwise they don't.</para>
   <xsl:variable name="targets" select="id(@linkend)"/>
   <xsl:variable name="target" select="$targets[1]"/>
 
-  <xsl:if test="$check.idref = '1'">
-    <xsl:if test="count($targets)=0">
-      <xsl:message>
-        <xsl:text>Error: no ID for productionrecap linkend: </xsl:text>
-        <xsl:value-of select="@linkend"/>
-        <xsl:text>.</xsl:text>
-      </xsl:message>
-    </xsl:if>
+  <xsl:if test="count($targets)=0">
+    <xsl:message>
+      <xsl:text>Error: no ID for productionrecap linkend: </xsl:text>
+      <xsl:value-of select="@linkend"/>
+      <xsl:text>.</xsl:text>
+    </xsl:message>
+  </xsl:if>
 
-    <xsl:if test="count($targets)>1">
-      <xsl:message>
-        <xsl:text>Warning: multiple "IDs" for productionrecap linkend: </xsl:text>
-        <xsl:value-of select="@linkend"/>
-        <xsl:text>.</xsl:text>
-      </xsl:message>
-    </xsl:if>
+  <xsl:if test="count($targets)>1">
+    <xsl:message>
+      <xsl:text>Warning: multiple "IDs" for productionrecap linkend: </xsl:text>
+      <xsl:value-of select="@linkend"/>
+      <xsl:text>.</xsl:text>
+    </xsl:message>
   </xsl:if>
+
   <xsl:apply-templates select="$target">
     <xsl:with-param name="recap" select="true()"/>
   </xsl:apply-templates>
@@ -310,7 +303,7 @@ borders, otherwise they don't.</para>
   <xsl:if test="preceding-sibling::constraint">
     <br/>
   </xsl:if>
-  <xsl:text>[ </xsl:text>
+  <xsl:text>[&#160;</xsl:text>
 
   <xsl:choose>
     <xsl:when test="@role">
@@ -332,11 +325,13 @@ borders, otherwise they don't.</para>
     <xsl:variable name="target" select="$targets[1]"/>
     <xsl:apply-templates select="$target" mode="title.markup"/>
   </a>
-  <xsl:text> ]</xsl:text>
+  <xsl:text>&#160;]</xsl:text>
 </xsl:template>
 
 <xsl:template match="constraintdef">
+  <xsl:variable name="id"><xsl:call-template name="object.id"/></xsl:variable>
   <div class="{name(.)}">
+    <a name="{$id}"/>
     <xsl:apply-templates/>
   </div>
 </xsl:template>
-- 
2.40.0