From 6f090ad2b7ed6f4bdaef100157c33b3c8a46a47c Mon Sep 17 00:00:00 2001
From: Pierre Labastie <pierre.labastie@neuf.fr>
Date: Wed, 18 Oct 2023 23:54:57 +0200
Subject: [PATCH] pdf book: fix page numbering in part III

By default page numbering in <preface> is in roman numeral. This
is ok for the book preface, but not for the part III preface.
So copy the page.number.format template from docbook stylesheets
to stylesheets/lfs-xsl/pdf/lfs-pagesetup.xsl, and modify it.

Reported by: Vladimir Pertsev on lfs-dev list
---
 stylesheets/lfs-xsl/pdf/lfs-pagesetup.xsl | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/stylesheets/lfs-xsl/pdf/lfs-pagesetup.xsl b/stylesheets/lfs-xsl/pdf/lfs-pagesetup.xsl
index 49337d0ef..787a0e8c1 100644
--- a/stylesheets/lfs-xsl/pdf/lfs-pagesetup.xsl
+++ b/stylesheets/lfs-xsl/pdf/lfs-pagesetup.xsl
@@ -241,4 +241,22 @@
     </fo:block>
   </xsl:template>
 
+  <!-- page.number.format
+       We want roman numerals only in book's preface, not parts prefaces
+       (if any). The original template is in {docbook-xsl}/fo/pagesetup.xsl -->
+  <xsl:template name="page.number.format">
+    <xsl:param name="element" select="local-name(.)"/>
+    <xsl:param name="master-reference" select="''"/>
+
+    <xsl:choose>
+      <xsl:when test="$element = 'toc' and self::book">i</xsl:when>
+      <xsl:when test="$element = 'set'">i</xsl:when>
+      <xsl:when test="$element = 'book'">i</xsl:when>
+      <xsl:when test="$element = 'preface' and not(ancestor::part)">i</xsl:when>
+      <xsl:when test="$element = 'dedication'">i</xsl:when>
+      <xsl:when test="$element = 'acknowledgements'">i</xsl:when>
+      <xsl:otherwise>1</xsl:otherwise>
+    </xsl:choose>
+  </xsl:template>
+
 </xsl:stylesheet>