root/docs/docbook-xsl/fo/ebnf.xsl

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1 <?xml version='1.0'?>
2 <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
3                 xmlns:fo="http://www.w3.org/1999/XSL/Format"
4                 xmlns:doc="http://nwalsh.com/xsl/documentation/1.0"
5                 exclude-result-prefixes="doc"
6                 version='1.0'>
7
8 <!-- ********************************************************************
9      $Id: ebnf.xsl,v 1.6 2005/08/09 09:30:43 bobstayton Exp $
10      ********************************************************************
11
12      This file is part of the XSL DocBook Stylesheet distribution.
13      See ../README or http://nwalsh.com/docbook/xsl/ for copyright
14      and other information.
15
16      ******************************************************************** -->
17
18 <doc:reference xmlns="">
19 <referenceinfo>
20 <releaseinfo role="meta">
21 $Id: ebnf.xsl,v 1.6 2005/08/09 09:30:43 bobstayton Exp $
22 </releaseinfo>
23 <author><surname>Walsh</surname>
24 <firstname>Norman</firstname></author>
25 <copyright><year>1999</year><year>2000</year><year>2001</year>
26 <holder>Norman Walsh</holder>
27 </copyright>
28 </referenceinfo>
29 <title>HTML EBNF Reference</title>
30
31 <partintro>
32 <section><title>Introduction</title>
33
34 <para>This is technical reference documentation for the DocBook XSL
35 Stylesheets; it documents (some of) the parameters, templates, and
36 other elements of the stylesheets.</para>
37
38 <para>This reference describes the templates and parameters relevant
39 to formatting EBNF markup.</para>
40
41 <para>This is not intended to be <quote>user</quote> documentation.
42 It is provided for developers writing customization layers for the
43 stylesheets, and for anyone who's interested in <quote>how it
44 works</quote>.</para>
45
46 <para>Although I am trying to be thorough, this documentation is known
47 to be incomplete. Don't forget to read the source, too :-)</para>
48 </section>
49 </partintro>
50 </doc:reference>
51
52 <!-- ==================================================================== -->
53
54 <xsl:template match="productionset">
55   <xsl:variable name="id"><xsl:call-template name="object.id"/></xsl:variable>
56
57   <xsl:choose>
58     <xsl:when test="title">
59       <fo:block id="{$id}" xsl:use-attribute-sets="formal.object.properties">
60         <xsl:call-template name="formal.object.heading">
61           <xsl:with-param name="placement" select="'before'"/>
62         </xsl:call-template>
63
64         <fo:table table-layout="fixed" width="100%">
65           <fo:table-column column-number="1" column-width="3%"/>
66           <fo:table-column column-number="2" column-width="15%"/>
67           <fo:table-column column-number="3" column-width="5%"/>
68           <fo:table-column column-number="4" column-width="52%"/>
69           <fo:table-column column-number="5" column-width="25%"/>
70           <fo:table-body start-indent="0pt" end-indent="0pt">
71             <xsl:apply-templates select="production|productionrecap"/>
72           </fo:table-body>
73         </fo:table>
74       </fo:block>
75     </xsl:when>
76     <xsl:otherwise>
77       <fo:table id="{$id}" table-layout="fixed" width="100%">
78         <fo:table-column column-number="1" column-width="3%"/>
79         <fo:table-column column-number="2" column-width="15%"/>
80         <fo:table-column column-number="3" column-width="5%"/>
81         <fo:table-column column-number="4" column-width="52%"/>
82         <fo:table-column column-number="5" column-width="25%"/>
83         <fo:table-body start-indent="0pt" end-indent="0pt">
84           <xsl:apply-templates select="production|productionrecap"/>
85         </fo:table-body>
86       </fo:table>
87     </xsl:otherwise>
88   </xsl:choose>
89 </xsl:template>
90
91 <xsl:template match="productionset/title">
92   <!-- suppressed -->
93 </xsl:template>
94
95 <xsl:template match="production">
96   <xsl:param name="recap" select="false()"/>
97   <xsl:variable name="id"><xsl:call-template name="object.id"/></xsl:variable>
98   <fo:table-row>
99     <fo:table-cell>
100       <fo:block text-align="start">
101         <xsl:text>[</xsl:text>
102         <xsl:number count="production" level="any"/>
103         <xsl:text>]</xsl:text>
104       </fo:block>
105     </fo:table-cell>
106     <fo:table-cell>
107       <fo:block text-align="end">
108         <xsl:choose>
109           <xsl:when test="$recap">
110             <fo:basic-link internal-destination="{$id}"
111                            xsl:use-attribute-sets="xref.properties">
112               <xsl:apply-templates select="lhs"/>
113             </fo:basic-link>
114           </xsl:when>
115           <xsl:otherwise>
116             <fo:wrapper id="{$id}">
117               <xsl:apply-templates select="lhs"/>
118             </fo:wrapper>
119           </xsl:otherwise>
120         </xsl:choose>
121       </fo:block>
122     </fo:table-cell>
123     <fo:table-cell>
124       <fo:block text-align="center">
125         <xsl:copy-of select="$ebnf.assignment"/>
126       </fo:block>
127     </fo:table-cell>
128     <fo:table-cell>
129       <fo:block>
130         <xsl:apply-templates select="rhs"/>
131         <xsl:copy-of select="$ebnf.statement.terminator"/>
132       </fo:block>
133     </fo:table-cell>
134     <fo:table-cell border-start-width="3pt">
135       <fo:block text-align="start">
136         <xsl:choose>
137           <xsl:when test="rhs/lineannotation|constraint">
138             <xsl:apply-templates select="rhs/lineannotation" mode="rhslo"/>
139             <xsl:apply-templates select="constraint"/>
140           </xsl:when>
141           <xsl:otherwise>
142             <xsl:text>&#160;</xsl:text>
143           </xsl:otherwise>
144         </xsl:choose>
145       </fo:block>
146     </fo:table-cell>
147   </fo:table-row>
148 </xsl:template>
149
150 <xsl:template match="productionrecap">
151   <xsl:variable name="targets" select="key('id',@linkend)"/>
152   <xsl:variable name="target" select="$targets[1]"/>
153
154   <xsl:if test="count($targets)=0">
155     <xsl:message>
156       <xsl:text>Error: no ID for productionrecap linkend: </xsl:text>
157       <xsl:value-of select="@linkend"/>
158       <xsl:text>.</xsl:text>
159     </xsl:message>
160   </xsl:if>
161
162   <xsl:if test="count($targets)>1">
163     <xsl:message>
164       <xsl:text>Warning: multiple "IDs" for productionrecap linkend: </xsl:text>
165       <xsl:value-of select="@linkend"/>
166       <xsl:text>.</xsl:text>
167     </xsl:message>
168   </xsl:if>
169
170   <xsl:apply-templates select="$target">
171     <xsl:with-param name="recap" select="true()"/>
172   </xsl:apply-templates>
173 </xsl:template>
174
175 <xsl:template match="lhs">
176   <xsl:apply-templates/>
177 </xsl:template>
178
179 <xsl:template match="rhs">
180   <xsl:apply-templates/>
181 </xsl:template>
182
183 <xsl:template match="nonterminal">
184   <xsl:variable name="linkend">
185     <xsl:call-template name="xpointer.idref">
186       <xsl:with-param name="xpointer" select="@def"/>
187     </xsl:call-template>
188   </xsl:variable>
189
190   <xsl:call-template name="check.id.unique">
191     <xsl:with-param name="linkend" select="$linkend"/>
192   </xsl:call-template>
193
194   <xsl:call-template name="check.idref.targets">
195     <xsl:with-param name="linkend" select="$linkend"/>
196     <xsl:with-param name="element-list">production</xsl:with-param>
197   </xsl:call-template>
198
199   <!-- If you don't provide content, you can't point outside this doc. -->
200   <xsl:choose>
201     <xsl:when test="*|text()"><!--nop--></xsl:when>
202     <xsl:otherwise>
203       <xsl:if test="$linkend = ''">
204         <xsl:message>
205           <xsl:text>Non-terminals with no content must point to </xsl:text>
206           <xsl:text>production elements in the current document.</xsl:text>
207         </xsl:message>
208         <xsl:message>
209           <xsl:text>Invalid xpointer for empty nt: </xsl:text>
210           <xsl:value-of select="@def"/>
211         </xsl:message>
212       </xsl:if>
213     </xsl:otherwise>
214   </xsl:choose>
215
216   <xsl:variable name="href">
217     <xsl:choose>
218       <xsl:when test="$linkend != ''">
219         <xsl:variable name="targets" select="key('id',$linkend)"/>
220         <xsl:variable name="target" select="$targets[1]"/>
221         <xsl:call-template name="object.id">
222           <xsl:with-param name="object" select="$target"/>
223         </xsl:call-template>
224       </xsl:when>
225       <xsl:otherwise>
226         <xsl:value-of select="@def"/>
227       </xsl:otherwise>
228     </xsl:choose>
229   </xsl:variable>
230
231   <fo:basic-link internal-destination="{$href}"
232                  xsl:use-attribute-sets="xref.properties">
233     <xsl:choose>
234       <xsl:when test="*|text()">
235         <xsl:apply-templates/>
236       </xsl:when>
237       <xsl:otherwise>
238         <xsl:choose>
239           <xsl:when test="$linkend != ''">
240             <xsl:variable name="targets" select="key('id',$linkend)"/>
241             <xsl:variable name="target" select="$targets[1]"/>
242             <xsl:apply-templates select="$target/lhs"/>
243           </xsl:when>
244           <xsl:otherwise>
245             <xsl:text>???</xsl:text>
246           </xsl:otherwise>
247         </xsl:choose>
248       </xsl:otherwise>
249     </xsl:choose>
250   </fo:basic-link>
251 </xsl:template>
252
253 <xsl:template match="rhs/lineannotation">
254   <!--nop-->
255 </xsl:template>
256
257 <xsl:template match="rhs/lineannotation" mode="rhslo">
258   <xsl:text>/*&#160;</xsl:text>
259   <xsl:apply-templates/>
260   <xsl:text>&#160;*/</xsl:text>
261 </xsl:template>
262
263 <xsl:template match="constraint">
264   <xsl:call-template name="check.id.unique">
265     <xsl:with-param name="linkend" select="@linkend"/>
266   </xsl:call-template>
267
268   <xsl:call-template name="check.idref.targets">
269     <xsl:with-param name="linkend" select="@linkend"/>
270     <xsl:with-param name="element-list">constraintdef</xsl:with-param>
271   </xsl:call-template>
272
273   <xsl:variable name="href">
274     <xsl:variable name="targets" select="key('id',@linkend)"/>
275     <xsl:variable name="target" select="$targets[1]"/>
276     <xsl:call-template name="object.id">
277       <xsl:with-param name="object" select="$target"/>
278     </xsl:call-template>
279   </xsl:variable>
280
281   <xsl:if test="preceding-sibling::constraint">
282     <fo:inline linefeed-treatment="preserve">&#xA;</fo:inline>
283   </xsl:if>
284   <xsl:text>[&#160;</xsl:text>
285
286   <xsl:choose>
287     <xsl:when test="@role">
288       <xsl:value-of select="@role"/>
289       <xsl:text>: </xsl:text>
290     </xsl:when>
291     <xsl:otherwise>
292       <xsl:variable name="targets" select="key('id',@linkend)"/>
293       <xsl:variable name="target" select="$targets[1]"/>
294       <xsl:if test="$target/@role">
295         <xsl:value-of select="$target/@role"/>
296         <xsl:text>: </xsl:text>
297       </xsl:if>
298     </xsl:otherwise>
299   </xsl:choose>
300
301   <fo:basic-link internal-destination="{$href}"
302                  xsl:use-attribute-sets="xref.properties">
303     <xsl:variable name="targets" select="key('id',@linkend)"/>
304     <xsl:variable name="target" select="$targets[1]"/>
305     <xsl:apply-templates select="$target" mode="title.markup"/>
306   </fo:basic-link>
307   <xsl:text>&#160;]</xsl:text>
308 </xsl:template>
309
310 <xsl:template match="constraintdef">
311   <xsl:variable name="id"><xsl:call-template name="object.id"/></xsl:variable>
312   <fo:block id="{$id}">
313     <xsl:apply-templates/>
314   </fo:block>
315 </xsl:template>
316
317 <xsl:template match="constraintdef/title">
318   <fo:block font-weight="bold">
319     <xsl:apply-templates/>
320   </fo:block>
321 </xsl:template>
322
323 <!-- ==================================================================== -->
324
325 </xsl:stylesheet>
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