#!/usr/bin/env perl
# -*- coding: utf-8; -*-

### texi2html customization script for LilyPond
### Author: Reinhold Kainhofer <reinhold@kainhofer.com>, 2008.
###         Some code parts copied from texi2html and adapted. These functions
###         were written mainly by Patrice Dumas
### License: GPLv3+
###
###
### Features implemented here:
### -) For split manuals, the main page is index.html.
### -) All @unnumbered* sections are placed into the same file
###    (implemented by split_at_numbered_sections)
### -) Use our custom CSS file, with IE-specific fixes in another CSS file,
###    implemented by lilypond_css_lines
### -) TOC (folded, with the current page highlighted) in an overflown <div>
###    is added to every page; implemented by:
###           lilypond_print_element_header -- building of the TOC
###           lilypond_toc_body -- generation of customized TOC output
###           lilypond_print_page_head -- start <div id="main">
###           print_lilypond_page_foot -- closing id=main, output of footer & TOC
### -) External refs are formatted only as "Text of the node" (not as >>see
###    "NODE" section "SECTION" in "BOOK"<< like with default texi2html). Also,
###    the leading "(book-name)" is removed.
###    Implemented by overriding lilypond_external_ref
### -) Navigation bars on top/bottom of the page and between sections are not
###    left-aligned, but use a combination of left/center/right aligned table
###    cells; For this, I heavily extend the texi2html code to allow for
###    differently aligned cells and for multi-line tables);
###    Implemented in lilypond_print_navigation
### -) Different formatting than the default: example uses the same formatting
###    as quote.
### -) Allow translated section titles: All section titles can be translated,
###    the original (English) title is associated with @translationof. This is
###    needed, because the file name / anchor is generated from the original
###    English title, since otherwise language-autoselection would break with
###    posted links.
###    Since it is then no longer possible to obtain the file name from the
###    section title, I keep a sectionname<=>filename/anchor around. This way,
###    xrefs from other manuals can simply load that map and retrieve the
###    correct file name for the link. Implemented in:
###           lilypond_unknown (handling of @translationof, in case
###                             extract_texi_filenames.py messes up...)
###           lilypond_element_file_name (correct file name: use the map)
###           lilypond_element_target_name (correct anchor: use the map)
###           lilypond_init_map (read in the externally created map from disk)
###           lilypond_external_href (load the map for xrefs, use the correct
###                                   link target)
### -) The HTML anchors for all sections are derived from the node name /
###    section title (pre-generated in the .xref-map file). Implemented by:
###           lilypond_element_target_name (adjust section anchors)
### -) Use the standard footnote format "<sup>nr</sup> text" instead of the
###    ugly format of texi2html (<h3>(nr)</h3><p>text</p>). Implemented in
###           makeinfo_like_foot_line_and_ref
###           makeinfo_like_foot_lines
###           makeinfo_like_paragraph
### -) In tables, don't wrap <p> around the contents. Implemented in
###           makeinfo_like_paragraph
###
###
### Useful helper functions:
### -) texinfo_file_name($node_name): returns a texinfo-compatible file name
###    for the given string $node_name (whitespace trimmed/replaced by -,
###    non-standard chars replaced by _xxxx (ascii char code) and forced to
###    start with a letter by prepending t_g if necessary)

package main;
$original_normalise_node = \&normalise_node;

sub t2h_default_normalise_node($)
{
    my $text = shift;
    $original_normalise_node->($text);
}

*normalise_node = sub($)
{
    my $text = shift;
    return &$Texi2HTML::Config::normalise_node($text);
};

package Texi2HTML::Config;
##$normalise_node = \&t2h_default_normalise_node;
$normalise_node = \&lilypond_normalise_node;


use utf8;
use Encode qw(decode);

#############################################################################
### TRANSLATIONS
#############################################################################

my $LY_LANGUAGES = {};
$LY_LANGUAGES->{'cs'} = {
    'Back to Documentation Index' => '',
    '<p>Thanks to ${webdev_link} for hosting ${lily_site}.' => '',
};

$LY_LANGUAGES->{'de'} = {
    'Back to Documentation Index' => 'Zur Dokumentationsübersicht',
    '<p>Thanks to ${webdev_link} for hosting ${lily_site}.' => '',
};

$LY_LANGUAGES->{'es'} = {
    'Back to Documentation Index' => 'Volver al índice de la documentación',
    '<p>Thanks to ${webdev_link} for hosting ${lily_site}.' => '<p>Agradecemos a ${webdev_link} el alojamiento de ${lily_site}.',
};

$LY_LANGUAGES->{'fr'} = {
    'Back to Documentation Index' => 'Retour à l\'accueil de la documentation',
    '<p>Thanks to ${webdev_link} for hosting ${lily_site}.' => '<p>Remerciements à ${webdev_link} pour l\'hébergement de ${lily_site}.',
};


$LY_LANGUAGES->{'hu'} = {
    'Back to Documentation Index' => 'Vissza a dokumentációk jegyzékéhez',
    '<p>Thanks to ${webdev_link} for hosting ${lily_site}.' => '<p>Köszönet a ${webdev_link} részére a ${lily_site} tárhelyért.',
};

$LY_LANGUAGES->{'it'} = {
    'Back to Documentation Index' => 'Torna all\'indice della documentazione',
    '<p>Thanks to ${webdev_link} for hosting ${lily_site}.' => 'Grazie a ${webdev_link} per l\'hosting di ${lily_site}.',
};

$LY_LANGUAGES->{'ja'} = {
    'Back to Documentation Index' => 'ドキュメント インデックスに戻る',
    '<p>Thanks to ${webdev_link} for hosting ${lily_site}.' => '<p>${lily_site} をホスティングしてくれている ${webdev_link} に感謝します。',
};


$LY_LANGUAGES->{'nl'} = {
    'Back to Documentation Index' => 'Terug naar de Documentatieindex',
    '<p>Thanks to ${webdev_link} for hosting ${lily_site}.' => '<p>Met dank aan ${webdev_link} voor het hosten van ${lily_site}.',
};

$LY_LANGUAGES->{'zh'} = {
    'Back to Documentation Index' => '回到文档索引',
    '<p>Thanks to ${webdev_link} for hosting ${lily_site}.' => '<p>非常感谢 ${webdev_link} 提供 ${lily_site} 的主机空间。',
};

# FIXME: request the translations below then send them to texi2html/texinfo devs

$LANGUAGES->{'it'} = {
                       '  The buttons in the navigation panels have the following meaning:' => '  I bottoni nei pannelli di navigazione hanno il seguente significato:',
                       '  where the @strong{ Example } assumes that the current position is at @strong{ Subsubsection One-Two-Three } of a document of the following structure:' => '  dove @strong{ Esempio } assume che l\'attuale posizione è alla @strong{ Sottosottosezione Uno-Due-Tre } di un documento che ha la seguente struttura:',
                       ' Up ' => ' Su ',
                       '(outside of any element)' => '(fuori da qualsiasi elemento)',
                       '(outside of any node)' => '(fuori da qualsiasi nodo)',
                       '@b{{quotation_arg}:} ' => '@b{{quotation_arg}:} ',
                       '@cite{{book}}' => '@cite{{book}}',
                       '@{No value for `{value}\'@}' => '@{Nessun valore per `{value}\'@}',
                       'About' => 'Informazioni',
                       'About (help)' => 'Informazioni (aiuto)',
                       'About This Document' => 'Informazioni su questo documento',
                       'April' => 'Aprile',
                       'August' => 'Agosto',
                       'Back' => 'Indietro',
                       'Back section in previous file' => '',
                       'Beginning of this chapter or previous chapter' => 'Inizio di questo capitolo o capitolo precedente',
                       'Button' => 'Bottone',
                       'Contents' => 'Contenuti',
                       'Cover (top) of document' => 'Copertina (inizio) del documento',
                       'Current' => 'Attuale',
                       'Current Position' => 'Posizione Attuale',
                       'Current section' => 'Sezione attuale',
                       'December' => 'Dicembre',
                       'FastBack' => 'Indietro veloce',
                       'FastForward' => 'Avanti veloce',
                       'February' => 'Febbraio',
                       'First' => 'Primo',
                       'First section in reading order' => 'Prima sezione in ordine di lettura',
                       'Following' => 'Seguente',
                       'Following node' => 'Nodo seguente',
                       'Footnotes' => 'Note a piè di pagina',
                       'Forward' => 'Avanti',
                       'Forward section in next file' => 'Sezione successiva nel prossimo file',
                       'From 1.2.3 go to' => 'Da 1.2.3 vai a',
                       'Go to' => 'Vai a',
                       'Index' => 'Indice',
                       'Index Entry' => 'Voce dell\'indice',
                       'January' => 'Gennaio',
                       'July' => 'Luglio',
                       'Jump to' => 'Salta a',
                       'June' => 'Giugno',
                       'Last' => 'Ultimo',
                       'Last section in reading order' => 'Ultima sezione in ordine di lettura',
                       'March' => 'Marzo',
                       'May' => 'Maggio',
                       'Menu:' => 'Menu',
                       'Name' => 'Nome',
                       'Next' => 'Successivo',
                       'Next chapter' => 'Capitolo successivo',
                       'Next file' => 'File successivo',
                       'Next node' => 'Nodo successivo',
                       'Next section in reading order' => 'Sezione successiva in ordine di lettura',
                       'Next section on same level' => 'Sezione successiva sullo stesso livello',
                       'NextFile' => 'File successivo',
                       'Node following in node reading order' => 'Nodo seguente in ordine di lettura',
                       'Node up' => 'Nodo superiore',
                       'NodeNext' => 'Nodo successivo',
                       'NodePrev' => 'Nodo precedente',
                       'NodeUp' => 'Nodo superiore',
                       'November' => 'Novembre',
                       'October' => 'Ottobre',
                       'Overview' => 'Panoramica',
                       'Prev' => 'Prec.',
                       'PrevFile' => 'File precedente',
                       'Previous' => 'Precedente',
                       'Previous file' => 'File precedente',
                       'Previous node' => 'Nodo precedente',
                       'Previous section in reading order' => 'Sezione precedente in ordine di lettura',
                       'Previous section on same level' => 'Sezione precedente sullo stesso livello',
                       'Section' => 'Sezione',
                       'Section One' => 'Sezione uno',
                       'See ' => 'Vedi',
                       'See @cite{{book}}' => 'Vedi @cite{{book}}',
                       'See section `@asis{}`{section_name}\'@asis{}\' in @cite{{book}}' => 'Vedi la sezione `@asis{}`{section_name}\'@asis{}\' in @cite{{book}}',
                       'See section `{section}\' in @cite{{book}}' => 'Vedi la sezione `{section}\' in @cite{{book}}',
                       'See section {reference_name}' => 'Vedi la sezione {reference_name}',
                       'See {node_file_href}' => 'Vedi {node_file_href}',
                       'See {node_file_href} @cite{{book}}' => 'Vedi {node_file_href} @cite{{book}}',
                       'See {node_file_href} section `{section}\' in @cite{{book}}' => 'Vedi {node_file_href} nella sezione `{section}\' in @cite{{book}}',
                       'See {reference_name}' => 'Vedi {reference_name}',
                       'See {ref}' => 'Vedi {ref}',
                       'See {title_ref}' => 'Vedi {title_ref}',
                       'September' => 'Settembre',
                       'Short Table of Contents' => 'Indice breve',
                       'Short table of contents' => 'Indice breve',
                       'Subsection One-Four' => 'Sottosezione Uno-Quattro',
                       'Subsection One-One' => 'Sottosezione Uno-Uno',
                       'Subsection One-Three' => 'Sottosezione Uno-Tre',
                       'Subsection One-Two' => 'Sottosezione Uno-Due',
                       'Subsubsection One-Two-Four' => 'Sottosottosezione Uno-Due-Quattro',
                       'Subsubsection One-Two-One' => 'Sottosottosezione Uno-Due-Uno',
                       'Subsubsection One-Two-Three' => 'Sottosottosezione Uno-Due-Tre',
                       'Subsubsection One-Two-Two' => 'Sottosottosezione Uno-Due-Due',
                       'T2H_today' => '%s, %d %d',
                       'Table of Contents' => 'Indice',
                       'Table of contents' => 'Indice',
                       'The node you are looking for is at {href}.' => 'Il nodo che stai cercando è {href}',
                       'This' => 'Questo',
                       'This document was generated on @i{{date}} using @uref{{program_homepage}, @i{{program}}}.' => 'Questo documento è stato generato il @i{{date}} con @uref{{program_homepage}, @i{{program}}}.',
                       'This document was generated using @uref{{program_homepage}, @emph{{program}}}.' => 'Questo documento è stato generato con @uref{{program_homepage}, @emph{{program}}}.',
                       'Top' => 'Inizio',
                       'Untitled Document' => 'Documento senza titolo',
                       'Up' => 'Su',
                       'Up node' => 'Nodo superiore',
                       'Up section' => 'Sezione superiore',
                       'current' => 'attuale',
                       'on @emph{{date}}' => 'il @emph{{date}}',
                       'section `@asis{}`{section_name}\'@asis{}\' in @cite{{book}}' => 'sezione `@asis{}`{section_name}\'@asis{}\' in @cite{{book}}',
                       'section `{section}\' in @cite{{book}}' => 'sezione `{section}\' in @cite{{book}}',
                       'see ' => 'vedi ',
                       'see @cite{{book}}' => 'vedi @cite{{book}}',
                       'see section `@asis{}`{section_name}\'@asis{}\' in @cite{{book}}' => 'vedi la sezione `@asis{}`{section_name}\'@asis{}\' in @cite{{book}}',
                       'see section `{section}\' in @cite{{book}}' => 'vedi la sezione `{section}\' in @cite{{book}}',
                       'see section {reference_name}' => 'vedi la sezione {reference_name}',
                       'see {node_file_href}' => 'vedi {node_file_href}',
                       'see {node_file_href} @cite{{book}}' => 'vedi {node_file_href} @cite{{book}}',
                       'see {node_file_href} section `{section}\' in @cite{{book}}' => 'vedi {node_file_href} nella sezione `{section}\' in @cite{{book}}',
                       'see {reference_name}' => 'vedi {reference_name}',
                       'see {ref}' => 'vedi {ref}',
                       'see {title_ref}' => 'vedi {title_ref}',
                       '{acronym_like} ({explanation})' => '{acronym_like} ({explanation})',
                       '{name} of {class}' => '{name} di {class}',
                       '{name} on {class}' => '{name} in {class}',
                       '{node_file_href}' => '{node_file_href}',
                       '{node_file_href} @cite{{book}}' => '{node_file_href} @cite{{book}}',
                       '{node_file_href} section `{section}\' in @cite{{book}}' => '{node_file_href} nella sezione `{section}\' in @cite{{book}}',
                       '{reference_name}' => '{reference_name}',
                       '{ref}' => '{ref}',
                       '{style} {number}' => '{style} {number}',
                       '{style}: {caption_first_line}' => '{style}: {caption_first_line}',
                       '{style}: {shortcaption_first_line}' => '{style}: {shortcaption_first_line}',
                       '{title_ref}' => '{title_ref}'
                     };

$LANGUAGES->{'hu'} = {
                       '  The buttons in the navigation panels have the following meaning:' => '  A navigációs panelen levő gombok jelentése a következő:',
                       '  where the @strong{ Example } assumes that the current position is at @strong{ Subsubsection One-Two-Three } of a document of the following structure:' => '  @strong{ Példánkban } az aktuális pozíció az @strong{ 1.2.3 alalszakasz } egy olyan dokumentumban, melynek szerkezete a következő:',
                       ' Up ' => 'Fel',
                       '(outside of any element)' => '(bármelyik elemen kívül)',
                       '(outside of any node)' => '(bármelyik csomóponton kívül)',
                       '@b{{quotation_arg}:} ' => '@b{{quotation_arg}:} ',
                       '@cite{{book}}' => '@cite{{book}}',
                       '@{No value for `{value}\'@}' => '@{Nincs értéke ennek: `{value}\'@}',
                       'About' => 'Súgó',
                       'About (help)' => 'Segítség a navigációhoz',
                       'About This Document' => 'A navigációs panel használata',
                       'April' => 'április',
                       'August' => 'augusztus',
                       'Back' => 'Vissza',
                       'Back section in previous file' => 'Előző fájl hátsó szakasza',
                       'Beginning of this chapter or previous chapter' => 'Fejezet eleje vagy előző fejezet',
                       'Button' => 'Gomb',
                       'Contents' => 'Tartalom',
                       'Cover (top) of document' => 'Dokumentum címoldala',
                       'Current' => 'Aktuális',
                       'Current Position' => 'Aktuális pozíció',
                       'Current section' => 'Aktuális szakasz',
                       'December' => 'december',
                       'FastBack' => 'Visszaugrás',
                       'FastForward' => 'Előreugrás',
                       'February' => 'február',
                       'First' => 'Első',
                       'First section in reading order' => 'Első szakasz az olvasási sorrendben',
                       'Following' => 'Következő',
                       'Following node' => 'Következő csomópont',
                       'Footnotes' => 'Lábjegyzet',
                       'Forward' => 'Előre',
                       'Forward section in next file' => 'Következő fájl elülső szakasza',
                       'From 1.2.3 go to' => '1.2.3-ból ide jutunk',
                       'Go to' => 'Cél',
                       'Index' => 'Tárgymutató',
                       'Index Entry' => 'Tárgymutató-bejegyzés',
                       'January' => 'január',
                       'July' => 'július',
                       'Jump to' => 'Ugorj ide',
                       'June' => 'június',
                       'Last' => 'Utolsó',
                       'Last section in reading order' => 'Utolsó szakasz az olvasási sorrendben',
                       'March' => 'március',
                       'May' => 'május',
                       'Menu:' => 'Menü:',
                       'Name' => 'Név',
                       'Next' => 'Következő',
                       'Next chapter' => 'Következő fejezet',
                       'Next file' => 'Következő fájl',
                       'Next node' => 'Következő csomópont',
                       'Next section in reading order' => 'Következő szakasz az olvasási sorrendben',
                       'Next section on same level' => 'Következő szakasz ugyanazon a szinten',
                       'NextFile' => 'KövetkezőFájl',
                       'Node following in node reading order' => 'Következő csomópont az olvasási sorrendben',
                       'Node up' => 'Szülő csomópont',
                       'NodeNext' => 'KövetkezőCsomópont',
                       'NodePrev' => 'ElőzőCsomópont',
                       'NodeUp' => 'SzülőCsomópont',
                       'November' => 'november',
                       'October' => 'október',
                       'Overview' => 'Áttekintés',
                       'Prev' => 'Előző',
                       'PrevFile' => 'ElőzőFájl',
                       'Previous' => 'Előző',
                       'Previous file' => 'Előző fájl',
                       'Previous node' => 'Előző csomópont',
                       'Previous section in reading order' => 'Előző szakasz az olvasási sorrendben',
                       'Previous section on same level' => 'Előző szakasz ugyanazon a szinten',
                       'Section' => 'Szakasz',
                       'Section One' => 'szakasz',
                       'See ' => 'Ld. ',
                       'See @cite{{book}}' => 'Ld. @cite{{book}}',
                       'See section `@asis{}`{section_name}\'@asis{}\' in @cite{{book}}' => 'Ld. ezt a szakaszt: `@asis{}`{section_name}\'@asis{}\' itt: @cite{{book}}',
                       'See section `{section}\' in @cite{{book}}' => 'Ld. ezt a szakaszt: `{section}\' itt: @cite{{book}}',
                       'See section {reference_name}' => 'Ld. ezt a szakaszt: {reference_name}',
                       'See {node_file_href}' => 'Ld. {node_file_href}',
                       'See {node_file_href} @cite{{book}}' => 'See {node_file_href} @cite{{book}}',
                       'See {node_file_href} section `{section}\' in @cite{{book}}' => 'Ld. {node_file_href} ezt a szakaszt: `{section}\' itt: @cite{{book}}',
                       'See {reference_name}' => 'Ld. {reference_name}',
                       'See {ref}' => 'Ld. {ref}',
                       'See {title_ref}' => 'Ld. {title_ref}',
                       'September' => 'szeptember',
                       'Short Table of Contents' => 'Rövid tartalomjegyzék',
                       'Short table of contents' => 'Rövid tartalomjegyzék',
                       'Subsection One-Four' => 'alszakasz',
                       'Subsection One-One' => 'alszakasz',
                       'Subsection One-Three' => 'alszakasz',
                       'Subsection One-Two' => 'alszakasz',
                       'Subsubsection One-Two-Four' => 'alalszakasz',
                       'Subsubsection One-Two-One' => 'alalszakasz',
                       'Subsubsection One-Two-Three' => 'alalszakasz',
                       'Subsubsection One-Two-Two' => 'alalszakasz',
                       'T2H_today' => '%s, %d %d',
                       'Table of Contents' => 'Tartalomjegyzék',
                       'Table of contents' => 'Tartalomjegyzék',
                       'The node you are looking for is at {href}.' => 'A keresett csomópont itt található: {href}.',
                       'This' => 'Ez a(z)',
                       'This document was generated on @i{{date}} using @uref{{program_homepage}, @i{{program}}}.' => 'Ezt a dokumentumot @i{{date}} napon generálta a(z) @uref{{program_homepage}, @i{{program}}}.',
                       'This document was generated using @uref{{program_homepage}, @emph{{program}}}.' => 'Ezt a dokumentumot a(z) @uref{{program_homepage}, @emph{{program}}} generálta.',
                       'Top' => 'Címoldal',
                       'Untitled Document' => 'Névtelen dokumentum',
                       'Up' => 'Fel',
                       'Up node' => 'Szülő csomópont',
                       'Up section' => 'Szülő szakasz',
                       'current' => 'aktuális',
                       'on @emph{{date}}' => 'ekkor: @emph{{date}}',
                       'section `@asis{}`{section_name}\'@asis{}\' in @cite{{book}}' => 'szakasz: `@asis{}`{section_name}\'@asis{}\' itt: @cite{{book}}',
                       'section `{section}\' in @cite{{book}}' => 'szakasz: `{section}\' itt: @cite{{book}}',
                       'see ' => 'ld. ',
                       'see @cite{{book}}' => 'ld. @cite{{book}}',
                       'see section `@asis{}`{section_name}\'@asis{}\' in @cite{{book}}' => 'ld. ezt a szakaszt: `@asis{}`{section_name}\'@asis{}\' itt: @cite{{book}}',
                       'see section `{section}\' in @cite{{book}}' => 'ld. ezt a szakaszt: `{section}\' itt: @cite{{book}}',
                       'see section {reference_name}' => 'ld. ezt a szakaszt: {reference_name}',
                       'see {node_file_href}' => 'ld. {node_file_href}',
                       'see {node_file_href} @cite{{book}}' => 'ld. {node_file_href} @cite{{book}}',
                       'see {node_file_href} section `{section}\' in @cite{{book}}' => 'ld. {node_file_href} ezt a szakaszt: `{section}\' itt: @cite{{book}}',
                       'see {reference_name}' => 'ld. {reference_name}',
                       'see {ref}' => 'ld. {ref}',
                       'see {title_ref}' => 'ld. {title_ref}',
                       '{acronym_like} ({explanation})' => '{acronym_like} ({explanation})',
                       '{name} of {class}' => '{name} típusa: {class}',
                       '{name} on {class}' => '{name} ezen: {class}',
                       '{node_file_href}' => '{node_file_href}',
                       '{node_file_href} @cite{{book}}' => '{node_file_href} @cite{{book}}',
                       '{node_file_href} section `{section}\' in @cite{{book}}' => '{node_file_href} szakasz: `{section}\' itt: @cite{{book}}',
                       '{reference_name}' => '{reference_name}',
                       '{ref}' => '{ref}',
                       '{style} {number}' => '{style} {number}',
                       '{style}: {caption_first_line}' => '{style}: {caption_first_line}',
                       '{style}: {shortcaption_first_line}' => '{style}: {shortcaption_first_line}',
                       '{title_ref}' => '{title_ref}'
                     };

$LANGUAGES->{'ja'} = {
                       '  The buttons in the navigation panels have the following meaning:' => '  ナビゲーション パネルの中にあるボタンには以下のような意味があります:',
                       '  where the @strong{ Example } assumes that the current position is at @strong{ Subsubsection One-Two-Three } of a document of the following structure:' => '  この表で、@strong{ 行き先 } は、現在の位置が以下のような構造を持つドキュメントの @strong{ サブサブセクション 1-2-3 } であると仮定しています:',
                       ' Up ' => ' 上へ ',
                       '(outside of any element)' => '(outside of any element)',
                       '(outside of any node)' => '(outside of any node)',
                       '@b{{quotation_arg}:} ' => '@b{{quotation_arg}:} ',
                       '@cite{{book}}' => '@cite{{book}}',
                       '@{No value for `{value}\'@}' => '@{No value for `{value}\'@}',
                       'About' => '情報',
                       'About (help)' => '情報 (ヘルプ)',
                       'About This Document' => 'このドキュメントについて',
                       'April' => '4 月',
                       'August' => '8 月',
                       'Back' => '戻る',
                       'Back section in previous file' => '前のファイルのセクションに戻る',
                       'Beginning of this chapter or previous chapter' => 'この章あるいは前の章の先頭',
                       'Button' => 'ボタン',
                       'Contents' => '目次',
                       'Cover (top) of document' => 'ドキュメントの表紙 (先頭)',
                       'Current' => '現在の',
                       'Current Position' => '現在の位置',
                       'Current section' => '現在のセクション',
                       'December' => '12 月',
                       'FastBack' => '大きく戻る',
                       'FastForward' => '大きく進む',
                       'February' => '2 月',
                       'First' => '最初',
                       'First section in reading order' => '最初のセクション',
                       'Following' => '次',
                       'Following node' => '次のノード',
                       'Footnotes' => '脚注',
                       'Forward' => '進む',
                       'Forward section in next file' => '次のファイルのセクションに進む',
                       'From 1.2.3 go to' => '1.2.3 からの行き先',
                       'Go to' => '行き先',
                       'Index' => 'インデックス',
                       'Index Entry' => 'インデックス エントリ',
                       'January' => '1 月',
                       'July' => '7 月',
                       'Jump to' => '行き先',
                       'June' => '6月',
                       'Last' => '最後',
                       'Last section in reading order' => '最後のセクション',
                       'March' => '3 月',
                       'May' => '5 月',
                       'Menu:' => 'メニュー',
                       'Name' => '名前',
                       'Next' => '次',
                       'Next chapter' => '次の章',
                       'Next file' => '次のファイル',
                       'Next node' => '次のノード',
                       'Next section in reading order' => '次のセクション',
                       'Next section on same level' => '次のセクション',
                       'NextFile' => '次のファイル',
                       'Node following in node reading order' => '次のノード',
                       'Node up' => '上のノード',
                       'NodeNext' => '次のノード',
                       'NodePrev' => '前のノード',
                       'NodeUp' => '上のノード',
                       'November' => '11 月',
                       'October' => '10 月',
                       'Overview' => '概要',
                       'Prev' => '前',
                       'PrevFile' => '前のファイル',
                       'Previous' => '前の',
                       'Previous file' => '前のファイル',
                       'Previous node' => '前のノード',
                       'Previous section in reading order' => '前のセクション',
                       'Previous section on same level' => '前のセクション',
                       'Section' => 'セクション',
                       'Section One' => 'セクション 1',
                       'See ' => '参照',
                       'See @cite{{book}}' => '@cite{{book}} を参照してください',
                       'See section `@asis{}`{section_name}\'@asis{}\' in @cite{{book}}' => '@cite{{book}} のセクション `@asis{}`{section_name}\'@asis{}\' を参照してください',
                       'See section `{section}\' in @cite{{book}}' => '@cite{{book}} のセクション `{section}\' を参照してください',
                       'See section {reference_name}' => 'セクション {reference_name} を参照してください',
                       'See {node_file_href}' => '{node_file_href} を参照してください',
                       'See {node_file_href} @cite{{book}}' => '@cite{{book}} の {node_file_href} を参照してください',
                       'See {node_file_href} section `{section}\' in @cite{{book}}' => '@cite{{book}} の {node_file_href} セクション `{section}\' を参照してください',
                       'See {reference_name}' => '{reference_name} を参照してください',
                       'See {ref}' => '{ref} を参照してください',
                       'See {title_ref}' => '{title_ref} を参照してください',
                       'September' => '9 月',
                       'Short Table of Contents' => '簡単な目次',
                       'Short table of contents' => '簡単な目次',
                       'Subsection One-Four' => 'サブセクション 1-4',
                       'Subsection One-One' => 'サブセクション 1-1',
                       'Subsection One-Three' => 'サブセクション 1-3',
                       'Subsection One-Two' => 'サブセクション 1-2',
                       'Subsubsection One-Two-Four' => 'サブサブセクション 1-2-4',
                       'Subsubsection One-Two-One' => 'サブサブセクション 1-2-1',
                       'Subsubsection One-Two-Three' => 'サブサブセクション 1-2-3',
                       'Subsubsection One-Two-Two' => 'サブサブセクション 1-2-2',
                       'T2H_today' => '%s, %d %d',
                       'Table of Contents' => '目次',
                       'Table of contents' => '目次',
                       'The node you are looking for is at {href}.' => 'あなたが探しているノードは {href} にあります。',
                       'This' => 'この',
                       'This document was generated on @i{{date}} using @uref{{program_homepage}, @i{{program}}}.' => 'このドキュメントは @i{{date}} に、@uref{{program_homepage}, @i{{program}}} を用いて生成されました。',
                       'This document was generated using @uref{{program_homepage}, @emph{{program}}}.' => 'このドキュメントは @uref{{program_homepage}, @emph{{program}}} を用いて生成されました。',
                       'Top' => 'トップ',
                       'Untitled Document' => '無題のドキュメント',
                       'Up' => '上',
                       'Up node' => '上のノード',
                       'Up section' => '上のセクション',
                       'current' => '現在の',
                       'on @emph{{date}}' => '@emph{{date}} に',
                       'section `@asis{}`{section_name}\'@asis{}\' in @cite{{book}}' => '@cite{{book}} のセクション `@asis{}`{section_name}\'@asis{}\'',
                       'section `{section}\' in @cite{{book}}' => '@cite{{book}} のセクション `{section}\'',
                       'see ' => '参照',
                       'see @cite{{book}}' => '@cite{{book}} を参照してください',
                       'see section `@asis{}`{section_name}\'@asis{}\' in @cite{{book}}' => '@cite{{book}} のセクション `@asis{}`{section_name}\'@asis{}\' を参照してください',
                       'see section `{section}\' in @cite{{book}}' => '@cite{{book}} のセクション `{section}\' を参照してください',
                       'see section {reference_name}' => 'セクション {reference_name} を参照してください',
                       'see {node_file_href}' => '{node_file_href} を参照してください',
                       'see {node_file_href} @cite{{book}}' => '{node_file_href} @cite{{book}} を参照してください',
                       'see {node_file_href} section `{section}\' in @cite{{book}}' => '@cite{{book}} の {node_file_href} section `{section}\' を参照してください',
                       'see {reference_name}' => '{reference_name} を参照してください',
                       'see {ref}' => '{ref} を参照してくださ',
                       'see {title_ref}' => '{title_ref} を参照してくださ',
                       '{acronym_like} ({explanation})' => '{acronym_like} ({explanation})',
                       '{name} of {class}' => '{class} の {name}',
                       '{name} on {class}' => '{class} の {name}',
                       '{node_file_href}' => '{node_file_href}',
                       '{node_file_href} @cite{{book}}' => '{node_file_href} @cite{{book}}',
                       '{node_file_href} section `{section}\' in @cite{{book}}' => '@cite{{book}} の {node_file_href} セクション `{section}\'',
                       '{reference_name}' => '{reference_name}',
                       '{ref}' => '{ref}',
                       '{style} {number}' => '{style} {number}',
                       '{style}: {caption_first_line}' => '{style}: {caption_first_line}',
                       '{style}: {shortcaption_first_line}' => '{style}: {shortcaption_first_line}',
                       '{title_ref}' => '{title_ref}'
                     };

$LANGUAGES->{'cs'} = {
                       '  The buttons in the navigation panels have the following meaning:' => '',
                       '  where the @strong{ Example } assumes that the current position is at @strong{ Subsubsection One-Two-Three } of a document of the following structure:' => '',
                       ' Up ' => '',
                       '(outside of any element)' => '',
                       '(outside of any node)' => '',
                       '@b{{quotation_arg}:} ' => '',
                       '@cite{{book}}' => '',
                       '@{No value for `{value}\'@}' => '',
                       'About' => '',
                       'About (help)' => '',
                       'About This Document' => '',
                       'April' => '',
                       'August' => '',
                       'Back' => '',
                       'Back section in previous file' => '',
                       'Beginning of this chapter or previous chapter' => '',
                       'Button' => '',
                       'Contents' => '',
                       'Cover (top) of document' => '',
                       'Current' => '',
                       'Current Position' => '',
                       'Current section' => '',
                       'December' => '',
                       'FastBack' => '',
                       'FastForward' => '',
                       'February' => '',
                       'First' => '',
                       'First section in reading order' => '',
                       'Following' => '',
                       'Following node' => '',
                       'Footnotes' => '',
                       'Forward' => '',
                       'Forward section in next file' => '',
                       'From 1.2.3 go to' => '',
                       'Go to' => '',
                       'Index' => '',
                       'Index Entry' => '',
                       'January' => '',
                       'July' => '',
                       'Jump to' => '',
                       'June' => '',
                       'Last' => '',
                       'Last section in reading order' => '',
                       'March' => '',
                       'May' => '',
                       'Menu:' => '',
                       'Name' => '',
                       'Next' => '',
                       'Next chapter' => '',
                       'Next file' => '',
                       'Next node' => '',
                       'Next section in reading order' => '',
                       'Next section on same level' => '',
                       'NextFile' => '',
                       'Node following in node reading order' => '',
                       'Node up' => '',
                       'NodeNext' => '',
                       'NodePrev' => '',
                       'NodeUp' => '',
                       'November' => '',
                       'October' => '',
                       'Overview' => '',
                       'Prev' => '',
                       'PrevFile' => '',
                       'Previous' => '',
                       'Previous file' => '',
                       'Previous node' => '',
                       'Previous section in reading order' => '',
                       'Previous section on same level' => '',
                       'Section' => '',
                       'Section One' => '',
                       'See ' => '',
                       'See @cite{{book}}' => '',
                       'See section `@asis{}`{section_name}\'@asis{}\' in @cite{{book}}' => '',
                       'See section `{section}\' in @cite{{book}}' => '',
                       'See section {reference_name}' => '',
                       'See {node_file_href}' => '',
                       'See {node_file_href} @cite{{book}}' => '',
                       'See {node_file_href} section `{section}\' in @cite{{book}}' => '',
                       'See {reference_name}' => '',
                       'See {ref}' => '',
                       'See {title_ref}' => '',
                       'September' => '',
                       'Short Table of Contents' => '',
                       'Short table of contents' => '',
                       'Subsection One-Four' => '',
                       'Subsection One-One' => '',
                       'Subsection One-Three' => '',
                       'Subsection One-Two' => '',
                       'Subsubsection One-Two-Four' => '',
                       'Subsubsection One-Two-One' => '',
                       'Subsubsection One-Two-Three' => '',
                       'Subsubsection One-Two-Two' => '',
                       'T2H_today' => '',
                       'Table of Contents' => '',
                       'Table of contents' => '',
                       'The node you are looking for is at {href}.' => '',
                       'This' => '',
                       'This document was generated on @i{{date}} using @uref{{program_homepage}, @i{{program}}}.' => '',
                       'This document was generated using @uref{{program_homepage}, @emph{{program}}}.' => '',
                       'Top' => '',
                       'Untitled Document' => '',
                       'Up' => '',
                       'Up node' => '',
                       'Up section' => '',
                       'current' => '',
                       'on @emph{{date}}' => '',
                       'section `@asis{}`{section_name}\'@asis{}\' in @cite{{book}}' => '',
                       'section `{section}\' in @cite{{book}}' => '',
                       'see ' => '',
                       'see @cite{{book}}' => '',
                       'see section `@asis{}`{section_name}\'@asis{}\' in @cite{{book}}' => '',
                       'see section `{section}\' in @cite{{book}}' => '',
                       'see section {reference_name}' => '',
                       'see {node_file_href}' => '',
                       'see {node_file_href} @cite{{book}}' => '',
                       'see {node_file_href} section `{section}\' in @cite{{book}}' => '',
                       'see {reference_name}' => '',
                       'see {ref}' => '',
                       'see {title_ref}' => '',
                       '{acronym_like} ({explanation})' => '',
                       '{name} of {class}' => '',
                       '{name} on {class}' => '',
                       '{node_file_href}' => '',
                       '{node_file_href} @cite{{book}}' => '',
                       '{node_file_href} section `{section}\' in @cite{{book}}' => '',
                       '{reference_name}' => '',
                       '{ref}' => '',
                       '{style} {number}' => '',
                       '{style}: {caption_first_line}' => '',
                       '{style}: {shortcaption_first_line}' => '',
                       '{title_ref}' => '{title_ref}'
                     };

$LANGUAGES->{'zh'} = {
                       '  The buttons in the navigation panels have the following meaning:' => '  在导航面板上按钮有以下含意：',
                       '  where the @strong{ Example } assumes that the current position is at @strong{ Subsubsection One-Two-Three } of a document of the following structure:' => ' 这里的@strong{ 例子 } 假设当前的位置是在紧接着的结构的文档中的 @strong{ 小分段 1-2-3 }：',
                       ' Up ' => ' 上 ',
                       '(outside of any element)' => '(任何元素外面)',
                       '(outside of any node)' => '(任何节点外面)',
                       '@b{{quotation_arg}:} ' => '@b{{quotation_arg}:} ',
                       '@cite{{book}}' => '@cite{{book}}',
                       '@{No value for `{value}\'@}' => '@{没有值 `{value}\'@}',
                       'About' => '关于',
                       'About (help)' => '关于 (帮助)',
                       'About This Document' => '关于本文档',
                       'April' => '4 月',
                       'August' => '8 月',
                       'Back' => '返回',
                       'Back section in previous file' => '返回到前一个文件',
                       'Beginning of this chapter or previous chapter' => '本章开头或前一章',
                       'Button' => '按钮',
                       'Contents' => '目录',
                       'Cover (top) of document' => '文档的封面(首页)',
                       'Current' => '当前',
                       'Current Position' => '当前的位置',
                       'Current section' => '当前的段',
                       'December' => '12 月',
                       'FastBack' => '快速返回',
                       'FastForward' => '快速向前',
                       'February' => '2 月',
                       'First' => '第一个',
                       'First section in reading order' => '看的第一段',
                       'Following' => '紧接着的',
                       'Following node' => '紧接着的节点',
                       'Footnotes' => '脚注',
                       'Forward' => '向前',
                       'Forward section in next file' => '向前到下一个文件的段',
                       'From 1.2.3 go to' => '从1.2.3 到',
                       'Go to' => '到',
                       'Index' => '索引',
                       'Index Entry' => '索引条目',
                       'January' => '1 月',
                       'July' => '7 月',
                       'Jump to' => '跳转到',
                       'June' => '6 月',
                       'Last' => '最后',
                       'Last section in reading order' => '看的最后一段',
                       'March' => '3 月',
                       'May' => '5 月',
                       'Menu:' => '菜单',
                       'Name' => '名字',
                       'Next' => '下一个',
                       'Next chapter' => '下一章',
                       'Next file' => '下一个文件',
                       'Next node' => '下一个节点',
                       'Next section in reading order' => '看的下一段',
                       'Next section on same level' => '同级的下一段',
                       'NextFile' => '下一个文件',
                       'Node following in node reading order' => '看的下一个节点',
                       'Node up' => '向上一个节点',
                       'NodeNext' => '下一个节点',
                       'NodePrev' => '前一个节点',
                       'NodeUp' => '向上一个节点',
                       'November' => '11 月',
                       'October' => '10 月',
                       'Overview' => '综述',
                       'Prev' => '前一个',
                       'PrevFile' => '前一个文件',
                       'Previous' => '前一个',
                       'Previous file' => '前一个文件',
                       'Previous node' => '前一个节点',
                       'Previous section in reading order' => '看的前一段',
                       'Previous section on same level' => '同级的前一段',
                       'Section' => '段',
                       'Section One' => '段 1',
                       'See ' => '见',
                       'See @cite{{book}}' => '见 @cite{{book}}',
                       'See section `@asis{}`{section_name}\'@asis{}\' in @cite{{book}}' => '',
                       'See section `{section}\' in @cite{{book}}' => '',
                       'See section {reference_name}' => '见段 {reference_name}',
                       'See {node_file_href}' => '见 {node_file_href}',
                       'See {node_file_href} @cite{{book}}' => '见 {node_file_href} @cite{{book}}',
                       'See {node_file_href} section `{section}\' in @cite{{book}}' => '见在@cite{{book}} 中的 {node_file_href} 段 `{section}\' ',
                       'See {reference_name}' => '见 {reference_name}',
                       'See {ref}' => '见 {ref}',
                       'See {title_ref}' => '见 {title_ref}',
                       'September' => '9 月',
                       'Short Table of Contents' => '短目录',
                       'Short table of contents' => '短目录',
                       'Subsection One-Four' => '分段 1-4',
                       'Subsection One-One' => '分段 1-1',
                       'Subsection One-Three' => '分段 1-3',
                       'Subsection One-Two' => '分段 1-2',
                       'Subsubsection One-Two-Four' => '小分段 1-2-4',
                       'Subsubsection One-Two-One' => '小分段 1-2-1',
                       'Subsubsection One-Two-Three' => '小分段 1-2-3',
                       'Subsubsection One-Two-Two' => '小分段 1-2-2',
                       'T2H_today' => '',
                       'Table of Contents' => '目录',
                       'Table of contents' => '目录',
                       'The node you are looking for is at {href}.' => '你查找的节点在{href}。',
                       'This' => '这个',
                       'This document was generated on @i{{date}} using @uref{{program_homepage}, @i{{program}}}.' => '本文档在 @i{{date}} 上用 @uref{{program_homepage}, @i{{program}}} 生成的。',
                       'This document was generated using @uref{{program_homepage}, @emph{{program}}}.' => '本文档用 @uref{{program_homepage}, @emph{{program}}} 生成的。',
                       'Top' => '首页',
                       'Untitled Document' => '没有标题的文档',
                       'Up' => '上',
                       'Up node' => '上一节点',
                       'Up section' => '上一段',
                       'current' => '目前',
                       'on @emph{{date}}' => '@emph{{date}} 上',
                       'section `@asis{}`{section_name}\'@asis{}\' in @cite{{book}}' => '',
                       'section `{section}\' in @cite{{book}}' => '',
                       'see ' => '见',
                       'see @cite{{book}}' => '见 @cite{{book}}',
                       'see section `@asis{}`{section_name}\'@asis{}\' in @cite{{book}}' => '见在@cite{{book}}里的段`@asis{}`{section_name}\'@asis{}\'',
                       'see section `{section}\' in @cite{{book}}' => '见在@cite{{book}}里的段`{section}\'',
                       'see section {reference_name}' => '见段 {reference_name}',
                       'see {node_file_href}' => '见 {node_file_href}',
                       'see {node_file_href} @cite{{book}}' => '见 {node_file_href} @cite{{book}}',
                       'see {node_file_href} section `{section}\' in @cite{{book}}' => '见在@cite{{book}}里的{node_file_href} 段`{section}\'',
                       'see {reference_name}' => '见 {reference_name}',
                       'see {ref}' => '见 {ref}',
                       'see {title_ref}' => '见 {title_ref}',
                       '{acronym_like} ({explanation})' => '{acronym_like} ({explanation})',
                       '{name} of {class}' => '{class} 的 {name}',
                       '{name} on {class}' => '在{class} 上的 {name}',
                       '{node_file_href}' => '',
                       '{node_file_href} @cite{{book}}' => '',
                       '{node_file_href} section `{section}\' in @cite{{book}}' => '{node_file_href} 段 `{section}\' 在 @cite{{book}}里',
                       '{reference_name}' => '',
                       '{ref}' => '{ref}',
                       '{style} {number}' => '{style} {number}',
                       '{style}: {caption_first_line}' => '{style}: {caption_first_line}',
                       '{style}: {shortcaption_first_line}' => '{style}: {shortcaption_first_line}',
                       '{title_ref}' => '{title_ref}'
                     };


sub ly_get_string () {
    my $lang = $Texi2HTML::THISDOC{current_lang};
    my $string = shift;
    if ($lang and $lang ne "en" and $LY_LANGUAGES->{$lang}->{$string}) {
	return $LY_LANGUAGES->{$lang}->{$string};
    } else {
	return $string;
    }
}


#############################################################################
### FUNCTIONALITY FOR MAIN WEB PAGES
#############################################################################

our $web_manual;

#############################################################################
###  SETTINGS FOR TEXI2HTML
#############################################################################

# Validation fix for texi2html<=1.82
$Texi2HTML::Config::DOCTYPE = '<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">';

@Texi2HTML::Config::CSS_REFS = (
    {FILENAME => "lilypond-manuals.css", TITLE => "Default style"}
    );
@Texi2HTML::Config::ALT_CSS_REFS      = (
    );

sub web_settings() {
  print STDERR "Processing web site: [$Texi2HTML::THISDOC{current_lang}]\n";
  $Texi2HTML::Config::BODYTEXT = "";
  @Texi2HTML::Config::CSS_REFS      = (
      {FILENAME => "lilypond-website.css", TITLE => "Default style"}
      );
  @Texi2HTML::Config::ALT_CSS_REFS      = (
      );
}

$Texi2HTML::Config::USE_ACCESSKEY = 1;
$Texi2HTML::Config::USE_LINKS     = 1;
$Texi2HTML::Config::USE_REL_REV   = 1;
$Texi2HTML::Config::SPLIT_INDEX   = 0;
$Texi2HTML::Config::SEPARATED_FOOTNOTES = 0; # Print footnotes on same page, not separated

my $bigpage = 0;
my $have_index_entries = 0;
if ($Texi2HTML::Config::SPLIT eq 'section' or
    $Texi2HTML::Config::SPLIT eq 'node') {
  $Texi2HTML::Config::element_file_name    = \&lilypond_element_file_name;
  $bigpage = 0;
} else {
  $bigpage = 1;
}

$Texi2HTML::Config::anchor  = \&lilypond_anchor;
$Texi2HTML::Config::element_target_name  = \&lilypond_element_target_name;
$default_print_element_header = $Texi2HTML::Config::print_element_header;
$Texi2HTML::Config::print_element_header = \&lilypond_print_element_header;
$Texi2HTML::Config::print_page_foot      = \&print_lilypond_page_foot;
$Texi2HTML::Config::print_navigation     = \&lilypond_print_navigation;
$Texi2HTML::Config::external_ref         = \&lilypond_external_ref;
$default_external_href = $Texi2HTML::Config::external_href;
$Texi2HTML::Config::external_href        = \&lilypond_external_href;
$default_toc_body = $Texi2HTML::Config::toc_body;
$Texi2HTML::Config::toc_body             = \&lilypond_toc_body;
$Texi2HTML::Config::css_lines            = \&lilypond_css_lines;
$default_unknown = $Texi2HTML::Config::unknown;
$Texi2HTML::Config::unknown              = \&lilypond_unknown;
$default_print_page_head = $Texi2HTML::Config::print_page_head;
$Texi2HTML::Config::print_page_head      = \&lilypond_print_page_head;
# $Texi2HTML::Config::foot_line_and_ref    = \&lilypond_foot_line_and_ref;
$Texi2HTML::Config::foot_line_and_ref  = \&makeinfo_like_foot_line_and_ref;
$Texi2HTML::Config::foot_lines         = \&makeinfo_like_foot_lines;
$Texi2HTML::Config::paragraph          = \&makeinfo_like_paragraph;



# Examples should be formatted similar to quotes:
$Texi2HTML::Config::complex_format_map->{'example'} = {
  'begin' => q{"<blockquote>"},
  'end' => q{"</blockquote>\n"},
  'style' => 'code',
 };

%Texi2HTML::config::misc_pages_targets = (
   'Overview' => 'Overview',
   'Contents' => 'Contents',
   'About' => 'About'
);


my @section_to_filename;




#############################################################################
###  DEBUGGING
#############################################################################

use Data::Dumper;
$Data::Dumper::Maxdepth = 2;

sub print_element_info($)
{
  my $element = shift;
  print "~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n";
  print "Element: $element\n";
  print Dumper($element);
}





#############################################################################
###  HELPER FUNCTIONS
#############################################################################

# only lc() the last portion of an href
sub lc_last($)
{
  my $href = shift;
  my @hrefsplit = split('/', $href);
  # change the last portion (the filename), if it exists;
  # if it is a plain filename with no path, change the string as a whole
  if ($#hrefsplit > 0) {
    @hrefsplit[$#hrefsplit] = lc( @hrefsplit[$#hrefsplit] );
    $href = join("/", @hrefsplit);
  } else {
    $href = lc($href);
  }
  return $href;
}

# Convert a given node name to its proper file name (normalization as explained
# in the texinfo manual:
# http://www.gnu.org/software/texinfo/manual/texinfo/html_node/HTML-Xref-Node-Name-Expansion.html
sub texinfo_file_name($)
{
  my $text = shift;
  my $result = '';
  # File name normalization by texinfo:
  # 1/2: letters and numbers are left unchanged
  # 3/4: multiple, leading and trailing whitespace is removed
  $text = main::normalise_space($text);
  # 5/6: all remaining spaces are converted to '-', all other 7- or 8-bit
  #      chars are replaced by _xxxx (xxxx=ascii character code)
  while ($text ne '') {
    if ($text =~ s/^([A-Za-z0-9]+)//o) { # number or letter stay unchanged
      $result .= $1;
    } elsif ($text =~ s/^ //o) { # space -> '-'
      $result .= '-';
    } elsif ($text =~ s/^(.)//o) { # Otherwise use _xxxx (ascii char code)
      my $ccode = ord($1);
      if ( $ccode <= 0xFFFF ) {
        $result .= sprintf("_%04x", $ccode);
      } else {
        $result .= sprintf("__%06x", $ccode);
      }
    }
  }
  # 7: if name does not begin with a letter, prepend 't_g' (so it starts with a letter)
  if ($result !~ /^[a-zA-Z]/) {
    $result = 't_g' . $result;
  }
  # DONE
  return lc_last($result)
}

# Load a file containing a nodename<=>filename map (tab-sepatared, i.e.
# NODENAME\tFILENAME\tANCHOR
# Returns a ref to a hash "Node title" => ["FilenameWithoutExt", "Anchor"]
sub load_map_file ($)
{
  my $mapfile = shift;
  my $node_map = ();

  # For some unknown reason, Perl on my system (5.10.0 on Fedora 12)
  # refuses to open map files of translated documents with
  # '<:encoding(utf8)', but decoding from UTF-8 line by line works. -jm
  if (open(XREFFILE,'<', $mapfile)) {
    my $line;
    # print STDERR "*** PRINTING MAP FILE LINES ***\n";
    while ( $line = decode ('UTF-8', <XREFFILE>) ) {
      # parse the tab-separated entries and insert them into the map:
      chomp($line);
      my @entries = split(/\t/, $line);
      if (scalar (@entries) == 3) {
	$node_map->{$entries[0]} = [$entries[1], $entries[2]];
	$, = " ";
	# print STDERR @entries;
	# print STDERR "\n";
      } else {
	print STDERR "Invalid entry in the node file $mapfile: $line\n";
      }
    }
    close (XREFFILE);
  } else {
    print STDERR "WARNING: Unable to load the map file $mapfile\n";
  }
  return $node_map;
}


# Split the given path into dir and basename (with .texi removed). Used mainly
# to get the path/basename of the original texi input file
sub split_texi_filename ($)
{
  my $docu = shift;
  my ($docu_dir, $docu_name);
  if ($docu =~ /(.*\/)/) {
    chop($docu_dir = $1);
    $docu_name = $docu;
    $docu_name =~ s/.*\///;
  } else {
     $docu_dir = '.';
     $docu_name = $docu;
  }
  $docu_name =~ s/\.te?x(i|info)?$//;
  return ($docu_dir, $docu_name);
}





#############################################################################
###  CSS HANDLING
#############################################################################

# Include our standard CSS file, not hard-coded CSS code directly in the HTML!
# For IE, conditionally include the lilypond-ie-fixes.css style sheet
sub lilypond_css_lines ($$)
{
  my $import_lines = shift;
  my $rule_lines = shift;
  return if (defined($Texi2HTML::THISDOC{'CSS_LINES'}));
  if (@$rule_lines or @$import_lines)
  {
    $Texi2HTML::THISDOC{'CSS_LINES'} = "<style type=\"text/css\">\n<!--\n";
    $Texi2HTML::THISDOC{'CSS_LINES'} .= join('',@$import_lines) . "\n" if (@$import_lines);
    $Texi2HTML::THISDOC{'CSS_LINES'} .= join('',@$rule_lines) . "\n" if (@$rule_lines);
    $Texi2HTML::THISDOC{'CSS_LINES'} .= "-->\n</style>\n";
  }
  foreach my $ref (@CSS_REFS)
  {
    $Texi2HTML::THISDOC{'CSS_LINES'} .=
	"<link rel=\"stylesheet\" type=\"text/css\" title=\"$ref->{TITLE}\" href=\"css/$ref->{FILENAME}\">\n";
  }
  foreach my $ref (@Texi2HTML::Config::ALT_CSS_REFS)
  {
    $Texi2HTML::THISDOC{'CSS_LINES'} .=
	"<link rel=\"alternate stylesheet\" type=\"text/css\" href=\"css/$ref->{FILENAME}\" title=\"$ref->{TITLE}\">\n";
  }

  # The ie-fixes stylesheet is needed for the docs, but not the website.
  if (not ($web_manual)) {
    $Texi2HTML::THISDOC{'CSS_LINES'} .=
	"<!--[if lte IE 7]>\n<link href=\"css/lilypond-ie-fixes.css\" rel=\"stylesheet\" type=\"text/css\">\n<![endif]-->\n";
  }

  if ($ENV{'AJAX_SEARCH'} == 1) {
    # Add the JavaScript file only if we have an index.
    # Unfortunately, init_out is called after css_lines, so as a workaround
    # here we have to check again for the existence of an index...
    my $ix = main::get_index ("cp");
    $have_index_entries = (scalar $ix > 0);
    my $reldir = "";
    $reldir = "../" unless $bigpage;
    if ($have_index_entries) {
      $Texi2HTML::THISDOC{'CSS_LINES'} .= "<script language=\"JavaScript\" src=\"${reldir}lily_search.js\"></script>\n";
    }
  }
}





#############################################################################
###  SPLITTING BASED ON NUMBERED SECTIONS
#############################################################################

my $lastfilename;
my $docnr = 0;
my $node_to_filename_map = ();
$source_to_translationof_map = ();


# This function makes sure that files are only generated for numbered sections,
# but not for unnumbered ones. It is called after texi2html has done its own
# splitting and simply returns the filename for the node given as first argument
# Nodes with the same filename will be printed out to the same filename, so
# this really all we need. Also, make sure that the file names for sections
# are derived from the section title. We also might want to name the anchors
# according to node titles, which works by simply overriding the id element of
# the $element hash.
# If an external nodename<=>filename/anchor map file is found (loaded in
# the command handler, use the externally created values, otherwise use the
# same logic here.
sub lilypond_element_file_name($$$)
{
  my $element = shift;
  my $type = shift;
  my $docu_name = shift;
  my $docu_ext = $Texi2HTML::Config::EXTENSION;

  my $node_name = main::remove_texi($element->{'node_ref'}->{'texi'});
  # the snippets page does not use nodes for the snippets, so in this case
  # we'll have to use the section name!
  if ($node_name eq '') {
    $node_name = main::remove_texi($element->{'texi'});
  }

  # If we have an entry in the section<=>filename map, use that one, otherwise
  # generate the filename/anchor here. In the latter case, external manuals
  # will not be able to retrieve the file name for xrefs!!! Still, I already
  # had that code, so I'll leave it in in case something goes wrong with the
  # extract_texi_filenames.py script in the lilypond build process!
  if (exists ($node_to_filename_map->{$node_name})) {
    (my $filename, my $anchor) = @{$node_to_filename_map->{$node_name}};
    $filename .= ".$docu_ext" if (defined($docu_ext));
    # don't do lc_last here, otherwise the colors are messed up!
    $filename = lc($filename);

    # unnumbered sections (except those at top-level!) always go to the same
    # file as the previous numbered section
    if (not ($web_manual) and not ($element->{number})
	and not ($lastfilename eq '') and ($element->{level} > 1)) {
      $filename = $lastfilename;
    }
    if (($filename eq $lastfilename)) {
      $$element{doc_nr} = $docnr;
    } else {
      $docnr += 1;
      $$element{doc_nr} = $docnr;
      $lastfilename = $filename;
    }
    #print STDERR "Output file name: $filename\n";
    $filename = lc_last($filename);
    return $filename;

  } elsif ($type eq "top" or $type eq "toc" or $type eq "doc" or
	   $type eq "stoc" or $type eq "foot" or $type eq "about") {
    return;
  } else {
    print STDERR "WARNING: Node '$node_name' was NOT found in the map\n"
        unless ($node_name eq '') or ($element->{'tag'} eq 'unnumberedsec')
               or ($node_name =~ /NOT REALLY USED/);

    # Numbered sections will get a filename Node_title, unnumbered sections will use
    # the file name of the previous numbered section:
    if (($element->{number}) or ($lastfilename eq '') or ($element->{level} == 1)) {
      # normalize to the same file name as texinfo
      if ($element->{translationof}) {
        $node_name = main::remove_texi($element->{translationof});
      }
      my $filename = texinfo_file_name($node_name);
      $filename .= ".$docu_ext" if (defined($docu_ext));
      $filename = lc_last($filename);
      $docnr += 1;
      $$element{doc_nr} = $docnr;
      $lastfilename = $filename;
      print STDERR "File name: $filename\n";
      return $filename;
    } else {
      $$element{doc_nr} = $docnr;
      $filename = lc_last($filename);
      print STDERR "File name: $filename\n";
      return $filename;
    }
  }

  return;
}

sub lilypond_normalise_node($)
{
    my $text = shift;
    my $norm = main::t2h_default_normalise_node($text);
    if (exists ($source_to_translationof_map->{$text})) {
	my $original = $source_to_translationof_map->{$text};
	$norm = main::t2h_default_normalise_node($original);
    }

    return $norm;
}

# This function produces an anchor.
#
# arguments:
# $name           :   anchor name
# $href           :   anchor href
# text            :   text displayed
# extra_attribs   :   added to anchor attributes list
sub lilypond_anchor($;$$$)
{
    my $name = shift;
    my $href = shift;
    my $text = shift;
    my $attributes = shift;
    $href = remove_unneeded_anchor($href);
    if (!defined($attributes) or ($attributes !~ /\S/))
    {
        $attributes = '';
    }
    else
    {
        $attributes = ' ' . $attributes;
    }
    $name = '' if (!defined($name) or ($name !~ /\S/));
    $href = '' if (!defined($href) or ($href !~ /\S/));
    $text = '' if (!defined($text));
    return $text if (($name eq '') and ($href eq ''));
    $name = "name=\"$name\"" if ($name ne '');
    $href = "href=\"$href\"" if ($href ne '');
    $href = ' ' . $href if (($name ne '') and ($href ne ''));
    return "<a ${name}${href}${attributes}>$text</a>";
}


sub lilypond_element_target_name($$$)
{
  my $element = shift;
  my $target = shift;
  my $id = shift;
  # Target is based on node name (or sec name for secs without node attached)
  my $node_name = main::remove_texi($element->{'node_ref'}->{'texi'});
  if ($node_name eq '') {
    $node_name = main::remove_texi($element->{'texi'});
  }

  # If we have an entry in the section<=>filename map, use that one, otherwise
  # generate the anchor here.
  if (exists ($node_to_filename_map->{$node_name})) {
    (my $filename, $target) = @{$node_to_filename_map->{$node_name}};
  } else {
    my $anchor = $node_name;
    if ($element->{translationof}) {
      $anchor = main::remove_texi($element->{translationof});
    }
    # normalize to the same file name as texinfo
    $target = texinfo_file_name($anchor);
  }
  # TODO: Once texi2html correctly prints out the target and not the id for
  #       the sections, change this back to ($id, $target)
  # I don't understand this comment, so I'm reluctant to delete it -gp
  $target = lc_last($target);
  $id = lc($target);
# $id =~ s/-1$//i; # remove any trailing "-1"
  return ($target, $id);
}


## Load the map file for the corrently processed texi file. We do this
#  using a command init handler, since texi2html does not have any
#  other hooks that are called after THISDOC is filled but before phase 2
#  of the texi2html conversion.
sub lilypond_init_map ()
{
    my ($docu_dir, $docu_name) = split_texi_filename ($Texi2HTML::THISDOC{'input_file_name'});
    my $map_filename = main::locate_include_file ("${docu_name}.$Texi2HTML::THISDOC{current_lang}.xref-map")
	|| main::locate_include_file ("${docu_name}.xref-map");
    #print STDERR "Map filename is: $map_filename\nDocu name is $docu_name\n";
    if ($docu_name eq 'web') {
	$web_manual = 1;
	web_settings();
    }
    $node_to_filename_map = load_map_file ($map_filename);
}
push @Texi2HTML::Config::command_handler_init, \&lilypond_init_map;



#############################################################################
###  CLEANER LINK TITLE FOR EXTERNAL REFS
#############################################################################

# The default formatting of external refs returns e.g.
# "(lilypond-internals)Timing_translator", so we remove all (...) from the
# file_and_node argument. Also, we want only a very simple format, so we don't
# even call the default handler!
sub lilypond_external_ref($$$$$$)
{
  my $type = shift;
  my $section = shift;
  my $book = shift;
  my $file_node = shift;
  my $href = shift;

  $href = lc_last($href);

  my $cross_ref = shift;

  my $displaytext = '';

  # 1) if we have a cross ref name, that's the text to be displayed:
  # 2) For the top node, use the (printable) name of the manual, unless we
  #    have an explicit cross ref name
  # 3) In all other cases use the section name
  if ($cross_ref ne '') {
    $displaytext = $cross_ref;
  } elsif (($section eq '') or ($section eq 'Top')) {
    $displaytext = $book;
  } else {
    $displaytext = $section;
  }

  $displaytext = &$anchor('', $href, $displaytext) if ($displaytext ne '');
  return &$I('%{node_file_href}', { 'node_file_href' => $displaytext });
}





#############################################################################
###  HANDLING TRANSLATED SECTIONS: handle @translationof, secname<->filename
###                  map stored on disk, xrefs in other manuals load that map
#############################################################################


# Try to make use of @translationof to generate files according to the original
# English section title...
sub lilypond_unknown($$$$$)
{
    my $macro = shift;
    my $line = shift;
    my $pass = shift;
    my $stack = shift;
    my $state = shift;

    # the @translationof macro provides the original English section title,
    # which should be used for file/anchor naming, while the title will be
    # translated to each language
    # It is already used by extract_texi_filenames.py, so this should not be
    # necessary here at all. Still, I'll leave the code in just in case the
    # python script messed up ;-)
    if ($pass == 1 and $macro eq "translationof") {
      if (ref($state->{'element'}) eq 'HASH') {
	  $state->{'element'}->{'translationof'} = main::normalise_space($line);
	  my $source = main::normalise_space ($line);
	  if (ref($state->{'node_ref'}) eq 'HASH') {
	      my $translationof = $state->{'node_ref'}->{'texi'};
	      our %source_to_translationof_map;
	      $source_to_translationof_map->{$source} = $translationof;
	  }
      }
      return ('', 1, undef, undef);
    } else {
      return &$default_unknown($macro, $line, $pass, $stack, $state);
    }
}


my %translated_books = ();
# Construct a href to an external source of information.
# node is the node with texinfo @-commands
# node_id is the node transliterated and transformed as explained in the
#         texinfo manual
# node_xhtml_id is the node transformed such that it is unique and can
#     be used to make an html cross ref as explained in the texinfo manual
# file is the file in '(file)node'
sub lilypond_external_href($$$)
{
  my $node = shift;
  my $node_id = shift;
  my $node_xhtml_id = shift;
  my $file = shift;

  # 1) Keep a hash of book->section_map
  # 2) if not file in keys hash => try to load the map (assign empty map if
  #    non-existent => will load only once!)
  # 3) if node in the section=>(file, anchor) map, replace node_id and
  #    node_xhtml_id by the map's values
  # 4) call the default_external_href with these values (or the old ones if not found)

  if (($node_id ne '') and defined($file) and ($node_id ne 'Top')) {
    my $map_name = $file;
    $map_name =~ s/-big-page//;

    # Load the map if we haven't done so already
    if (!exists($translated_books{$map_name})) {
      my ($docu_dir, $docu_name) = split_texi_filename ($Texi2HTML::THISDOC{'input_file_name'});
      my $map_filename = main::locate_include_file ("${map_name}.$Texi2HTML::THISDOC{current_lang}.xref-map")
	  || main::locate_include_file ("${map_name}.xref-map");
      $translated_books{$map_name} = load_map_file ($map_filename);
    }

    # look up translation. use these values instead of the old filename/anchor
    my $section_name_map = $translated_books{$map_name};
    my $node_text = main::remove_texi($node);
    if (defined($section_name_map->{$node_text})) {
      ($node_id, $node_xhtml_id) = @{$section_name_map->{$node_text}};
    } else {
      print STDERR "WARNING: Unable to find node '$node_text' in book $map_name.\n";
    }
  }

  if (defined $file) {
    $href = &$default_external_href($node, $node_id, $node_xhtml_id, lc_last($file));
    $href = remove_unneeded_anchor($href);

    if ($web_manual) {
      my $only_web_version = $ENV{ONLY_WEB_VERSION};
      if ($only_web_version) {
        $href = "../../doc/".$only_web_version."/Documentation/web/".$href;
      }
    }

    return $href;
  } else {
    $href = &$default_external_href($node, $node_id, $node_xhtml_id);
    $href = remove_unneeded_anchor($href);
    return $href;
  }
}

sub remove_unneeded_anchor($)
{
  my $href = shift;
  my @hrefsplit = split("/", $href);
  for ($i = 0; $i < @hrefsplit; $i++) {
    $item = @hrefsplit[$i];
    if ($item =~ /#/) {
      @split = split(".html#", $item);
      if (@split[0] eq @split[1]) {
        @hrefsplit[$i] = @split[0] . ".html";
      }
    }
  }
  $href = join("/", @hrefsplit);
  return $href
}



#############################################################################
###  CUSTOM TOC FOR EACH PAGE (in a frame on the left)
#############################################################################

my $page_toc_depth = 2;
my @default_toc = [];

# Initialize the toc_depth to 1 if the command-line option -D=short_toc is given
sub lilypond_init_toc_depth ()
{
  if (exists($main::value{'short_toc'}) and not exists($main::value{'bigpage'})
      and not $web_manual) {
    $page_toc_depth = 1;
  }
}
# Set the TOC-depth (depending on a texinfo variable short_toc) in a
# command-handler, so we have them available when creating the pages
push @Texi2HTML::Config::command_handler_process, \&lilypond_init_toc_depth;



# recursively generate the TOC entries for the element and its children (which
# are only shown up to maxlevel. All ancestors of the current element are also
# shown with their immediate children, irrespective of their level.
# Unnumbered entries are only printed out if they are at top-level or 2nd level
# or their parent element is an ancestor of the currently viewed node.
# The conditions to call this method to print the entry for a child node is:
# -) the parent is an ancestor of the current page node
# -) the parent is a numbered element at top-level toplevel (i.e. show numbered
#    and unnumbered 2nd-level children of numbered nodes)
# -) the child element is a numbered node below level maxlevel
sub generate_ly_toc_entries($$$$$)
{
  my $element = shift;
  my $element_path = shift;
  my $maxlevel = shift;
  if ($web_manual) {
    $maxlevel = 1;
  }
  my $child_count = shift;
  my $current_element = shift;
  # Skip undefined sections, plus all sections generated by index splitting
  return() if (not defined($element) or exists($element->{'index_page'}));
  my @result = ();
  my $level = $element->{'toc_level'};
  my $is_parent_of_current = $element->{'id'} && $element_path->{$element->{'id'}};
  my $ind = '  ' x $level;
  my $this_css_class = " class=\"";
  # color indices for the second navigation bar on the website
  if ($web_manual) {
      my %color_maps = (
	  'introduction' => [2, 2, 2, 2, 3, 3, 4, 4],
	  'download' => [2, 2, 2, 3, 3, 4],
	  'manuals' => [1, 1, 1, 2, 2, 2, 3, 3, 3, 3, 3, 4, 4, 4],
	  'community' => [1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 4, 4],
	  );
      my $addColor = "colorDefault";
      while (($top_section, $color_indices) = each %color_maps) {
	  if (index ($element->{'sectionup'}->{'file'}, $top_section) >= 0) {
	      $addColor = "color" . $color_indices->[$child_count];
	  }
      }
      $this_css_class .= $addColor;
  }
  $this_css_class .= $is_parent_of_current ? ' toc_current"' : '"';
  my $entry = "$ind<li$this_css_class>" .
      &$anchor ($element->{'tocid'},
		"$element->{'file'}#$element->{'target'}",
		$element->{'text'});

  push (@result, $entry);
  my $children = $element->{'section_childs'};
  if (defined($children) and (ref($children) eq "ARRAY")) {
    my $force_children = $is_parent_of_current or ($level == 1 and $element->{'number'});
    my @child_result = ();
    my $sub_child_count = 0;
    foreach my $c (@$children) {
      my $is_numbered_child = defined ($c->{'number'});
      my $below_maxlevel = $c->{'toc_level'} le $maxlevel;
      if ($force_children or ($is_numbered_child and $below_maxlevel)) {
        my @child_res =
	    generate_ly_toc_entries($c, $element_path, $maxlevel, $sub_child_count, $current_element);
        push (@child_result, @child_res);
	$sub_child_count += 1;
      }
    }
    # if no child nodes were generated, e.g. for the index, where expanded pages
    # are ignored, don't generate a list at all...
    if (@child_result) {
      push (@result, "\n$ind<ul$NO_BULLET_LIST_ATTRIBUTE>\n");
      if ($web_manual) {
        push (@result, "$ind<li class=\"colorDefault" .
	      ($element->{'text'} eq $current_element->{'text'} ?
	       ' toc_current">' : '">') .
	      &$anchor ($element->{'tocid'},
			"$element->{'file'}#$element->{'target'}",
			$element->{'text'}) . "</li>\n");
      }
      push (@result, @child_result);
      push (@result, "$ind</ul>\n");
    }
  }
  push (@result, "$ind</li>\n");
  return @result;
}


# Print a customized TOC, containing only the first two levels plus the whole
# path to the current page
sub lilypond_generate_page_toc_body($)
{
    my $element = shift;
    my $current_element = $element;
    my %parentelements;
    $parentelements{$element->{'id'}} = 1;
    # Find the path to the current element
    while ( defined($current_element->{'sectionup'}) and
           ($current_element->{'sectionup'} ne $current_element) )
    {
      $parentelements{$current_element->{'sectionup'}->{'id'}} = 1
              if ($current_element->{'sectionup'}->{'id'} ne '');
      $current_element = $current_element->{'sectionup'};
      if ($web_manual) {
        if (exists($main::value{'shallow_toc'})) {
          last;
        }
      }
    }
    return () if not defined($current_element);
    # Create the toc entries recursively
    my @toc_entries = "";
    if ($web_manual) {
        @toc_entries = "<ul$NO_BULLET_LIST_ATTRIBUTE>\n";
        # FIXME: add link to main page, really hackily.
        if ($element->{'sectionup'}) {
            # it's not the top element
            push (@toc_entries, "<li><a href=\"index.html\">Main</a></li>\n");
        } else {
            push (@toc_entries,
		  "<li class=\"toc_current\"><a href=\"index.html\">Main</a></li>\n");
        }
    } else {
        push (@toc_entries, "<div class=\"contents\">\n");
        push (@toc_entries, "<ul$NO_BULLET_LIST_ATTRIBUTE>\n");
    }
    my $children = $current_element->{'section_childs'};
    foreach ( @$children ) {
      push (@toc_entries, generate_ly_toc_entries($_, \%parentelements, $page_toc_depth, 0, $element));
    }
    # search box
    #  I'm assuming that we wouldn't keep the google search box? -gp
    if (!($ENV{AJAX_SEARCH} == 1)) {
      local $/=undef;
      my $name = "search-box";
      $lang = $Texi2HTML::THISDOC{current_lang};
      open FILE, "$ENV{TOP_SRC_DIR}/Documentation/$lang/$name.ihtml" or
	open FILE, "$ENV{TOP_SRC_DIR}/Documentation/$name.ihtml"  or
	die "no such file: $name.ihtml: $!";
      my $search_string = decode ('UTF-8', <FILE>);
      $search_string = "<li>\n" . $search_string . "</li>\n";
      push (@toc_entries, $search_string);
      close FILE;
    }

    push (@toc_entries, "</ul>\n");
    if ($web_manual) {
	push (@toc_entries, "\n");
    } else {
	push (@toc_entries, "</div>\n");
    }
    return @toc_entries;
}

sub lilypond_print_toc_div ($$)
{
  my $fh = shift;
  my $tocref = shift;
  my @lines = @$tocref;
  # use default TOC if no custom lines have been generated
  @lines = @default_toc if (not @lines);
  if (@lines) {

    print $fh "\n\n<div id=\"tocframe\">\n";

    # Remove the leading "GNU LilyPond --- " from the manual title
    my $topname = $Texi2HTML::NAME{'Top'};
    $topname =~ s/^GNU LilyPond(:| &[mn]dash;) //;

    # construct the top-level Docs index (relative path and including language!)
    my $lang = $Texi2HTML::THISDOC{current_lang};
    if ($lang and $lang ne "en") {
      $lang .= ".";
    } else {
      $lang = "";
    }
    my $reldir = $ENV{DEPTH};
    # strip one depth level for translations
    if ($lang and $lang ne "en" and substr ($reldir, 0, 3) eq '../') {
	$reldir = substr ($reldir, 3);
    }
    # add a / at the end if there isn't one.
    if (substr ($reldir, -1) ne '/') {
        $reldir .= '/';
    }
    my $uplink = $reldir."Documentation/web/manuals.${lang}html";

    if (not $web_manual) {
      print $fh "<p class=\"toc_uplink\"><a href=\"$uplink\"
         title=\"Documentation Index\">&lt;&lt; " .
	 &ly_get_string ('Back to Documentation Index') .
	 "</a></p>\n";

      # AJAX search box, written in JavaScript
      if ($ENV{'AJAX_SEARCH'} == 1) {
        if ($have_index_entries) {
          my ($docu_dir, $docu_name) = split_texi_filename ($Texi2HTML::THISDOC{'input_file_name'});
          print $fh '<script language="JavaScript">print_search_field ("' .
             $Texi2HTML::THISDOC{current_lang} . '", "' . 
             $docu_name . "\", " . $bigpage . ")</script>\n";
        }
      }

      print $fh '<h4 class="toc_header"> ' . &$anchor('',
                                    $Texi2HTML::HREF{'Top'},
                                    $topname . " <!-- Sidebar Version Tag  --> ",
                                    'title="Start of the manual"'
                                   ) . "</h4>\n";
    }

    foreach my $line (@lines) {
      print $fh $line;
    }
    print $fh "</div>\n\n";
  }
}

# Create the custom TOC for this page (partially folded, current page is
# highlighted) and store it in a global variable. The TOC is written out after
# the html contents (but positioned correctly using CSS), so that browsers with
# css turned off still show the contents first.
our @this_page_toc = ();
sub lilypond_print_element_header
{
  my $first_in_page = shift;
  my $previous_is_top = shift;
  if ($first_in_page and not @this_page_toc) {
    if (defined($Texi2HTML::THIS_ELEMENT)) {
      # Create the TOC for this page
      @this_page_toc = lilypond_generate_page_toc_body($Texi2HTML::THIS_ELEMENT);
    }
  }
  return &$default_print_element_header( $first_in_page, $previous_is_top);
}

# Generate the HTML output for the TOC
sub lilypond_toc_body($)
{
    my $elements_list = shift;
    # Generate a default TOC for pages without THIS_ELEMENT
    @default_toc = lilypond_generate_page_toc_body(@$elements_list[0]);
    return &$default_toc_body($elements_list);
}

# Print out the TOC in a <div> at the beginning of the page
sub lilypond_print_page_head($)
{
    my $fh = shift;
    &$default_print_page_head($fh);
    print $fh "<div id=\"main\">\n";
}

# Print out the TOC in a <div> at the end of th page, which will be formatted as a
# sidebar mimicking a TOC frame
sub print_lilypond_page_foot($)
{
  my $fh = shift;
  my $program_string = &$program_string();
#   print $fh "<p><font size='-1'>$program_string</font><br>$PRE_BODY_CLOSE</p>\n";
  print $fh "<!-- FOOTER -->\n\n";
  print $fh "<!-- end div#main here -->\n</div>\n\n";
  if ($web_manual) {
    # FIXME: This div and p#languages need to be in div#footer.
    #        Should we move this div to postprocess_html.py ?
    print $fh "<div id=\"verifier_texinfo\">\n";
    print $fh "<h3>Validation</h3>\n";
    # FIXME: inlined text substitution, move to ly_get_string as soon as another case is needed
    my $webdev_link = "<a href=\"http://www.webdev.nl/\">webdev.nl</a>";
    my $lily_site = "<code>lilypond.org</code>";
    my $hosting_thanks = &ly_get_string ('<p>Thanks to ${webdev_link} for hosting ${lily_site}.');
    # this does the variable substitution ("quoting" in Perlish) after the localization
    $hosting_thanks =~ s/(\$\{\w+\})/$1/eeg;
    print $fh $hosting_thanks . "\n";
    print $fh "<a href=\"http://validator.w3.org/check?uri=referer\">\n";
    print $fh "<img src=\"http://www.w3.org/Icons/valid-html401\"\n";
    print $fh "     alt=\"Valid HTML 4.01 Transitional\"\n";
    print $fh "     height=\"31\" width=\"88\"></a></p>\n";
    print $fh "</div>";
  }

  # Print the TOC frame and reset the TOC:
  lilypond_print_toc_div ($fh, \@this_page_toc);
  @this_page_toc = ();

  # Close the page:
  print $fh "</body>\n</html>\n";
}





#############################################################################
###  NICER / MORE FLEXIBLE NAVIGATION PANELS
#############################################################################

sub get_navigation_text
{
  my $button = shift;
  my $text = $NAVIGATION_TEXT{$button};
  if ( ($button eq 'Back') or ($button eq 'FastBack') ) {
    $text = $text . $Texi2HTML::NODE{$button} . "&nbsp;";
  } elsif ( ($button eq 'Forward') or ($button eq 'FastForward') ) {
    $text = "&nbsp;" . $Texi2HTML::NODE{$button} . $text;
  } elsif ( $button eq 'Up' ) {
    $text = "&nbsp;".$text.":&nbsp;" . $Texi2HTML::NODE{$button} . "&nbsp;";
  }
  return $text;
}


# Don't automatically create left-aligned table cells for every link, but
# instead create a <td> only on an appropriate '(left|right|center)-aligned-cell-n'
# button text. It's alignment as well as the colspan will be taken from the
# name of the button. Also, add 'newline' button text to create a new table
# row. The texts of the buttons are generated by get_navigation_text and
# will contain the name of the next/previous section/chapter.
sub lilypond_print_navigation
{
    my $buttons = shift;
    my $vertical = shift;
    my $spacing = 1;
    my $result = "<table class=\"nav_table\">\n";

    $result .= "<tr>" unless $vertical;
    my $beginofline = 1;
    foreach my $button (@$buttons)
    {
        $result .= qq{<tr valign="top" align="left">\n} if $vertical;
        # Allow (left|right|center)-aligned-cell and newline as buttons!
        if ( $button =~ /^(.*)-aligned-cell-(.*)$/ )
        {
          $result .= qq{</td>} unless $beginofline;
          $result .= qq{<td valign="middle" align="$1" colspan="$2">};
          $beginofline = 0;
        }
        elsif ( $button eq 'newline' )
        {
          $result .= qq{</td>} unless $beginofline;
          $result .= qq{</tr>};
          $result .= qq{<tr>};
          $beginofline = 1;

        }
        elsif (ref($button) eq 'CODE')
        {
            $result .= &$button($vertical);
        }
        elsif (ref($button) eq 'SCALAR')
        {
            $result .= "$$button" if defined($$button);
        }
        elsif (ref($button) eq 'ARRAY')
        {
            my $text = $button->[1];
            my $button_href = $button->[0];
            # verify that $button_href is simple text and text is a reference
            if (defined($button_href) and !ref($button_href)
               and defined($text) and (ref($text) eq 'SCALAR') and defined($$text))
            {             # use given text
                if ($Texi2HTML::HREF{$button_href})
                {
                  my $anchor_attributes = '';
                  if ($USE_ACCESSKEY and (defined($BUTTONS_ACCESSKEY{$button_href})) and
		      ($BUTTONS_ACCESSKEY{$button_href} ne ''))
                  {
                      $anchor_attributes = "accesskey=\"$BUTTONS_ACCESSKEY{$button_href}\"";
                  }
                  if ($USE_REL_REV and (defined($BUTTONS_REL{$button_href})) and
		      ($BUTTONS_REL{$button_href} ne ''))
                  {
                      $anchor_attributes .= " rel=\"$BUTTONS_REL{$button_href}\"";
                  }
                  $result .=  "" .
                        &$anchor('',
                                    $Texi2HTML::HREF{$button_href},
                                    get_navigation_text($$text),
                                    $anchor_attributes
                                   );
                }
                else
                {
                  $result .=  get_navigation_text($$text);
                }
            }
        }
        elsif ($button eq ' ')
        {                       # handle space button
            $result .=
                ($ICONS && $ACTIVE_ICONS{' '}) ?
                    &$button_icon_img($BUTTONS_NAME{$button}, $ACTIVE_ICONS{' '}) :
                        $NAVIGATION_TEXT{' '};
            #next;
        }
        elsif ($Texi2HTML::HREF{$button})
        {                       # button is active
            my $btitle = $BUTTONS_GOTO{$button} ?
                'title="' . $BUTTONS_GOTO{$button} . '"' : '';
            if ($USE_ACCESSKEY and (defined($BUTTONS_ACCESSKEY{$button})) and
		($BUTTONS_ACCESSKEY{$button} ne ''))
            {
                $btitle .= " accesskey=\"$BUTTONS_ACCESSKEY{$button}\"";
            }
            if ($USE_REL_REV and (defined($BUTTONS_REL{$button})) and
		($BUTTONS_REL{$button} ne ''))
            {
                $btitle .= " rel=\"$BUTTONS_REL{$button}\"";
            }
            if ($ICONS && $ACTIVE_ICONS{$button})
            {                   # use icon
                $result .= '' .
                    &$anchor('',
                        $Texi2HTML::HREF{$button},
                        &$button_icon_img($BUTTONS_NAME{$button},
                                   $ACTIVE_ICONS{$button},
                                   $Texi2HTML::SIMPLE_TEXT{$button}),
                        $btitle
                      );
            }
            else
            {                   # use text
                $result .=
                    '[' .
                        &$anchor('',
                                    $Texi2HTML::HREF{$button},
                                    get_navigation_text($button),
                                    $btitle
                                   ) .
                                       ']';
            }
        }
        else
        {                       # button is passive
            $result .=
                $ICONS && $PASSIVE_ICONS{$button} ?
                    &$button_icon_img($BUTTONS_NAME{$button},
                                          $PASSIVE_ICONS{$button},
                                          $Texi2HTML::SIMPLE_TEXT{$button}) :

                                              "[" . get_navigation_text($button) . "]";
        }
        $result .= "</td>\n" if $vertical;
        $result .= "</tr>\n" if $vertical;
    }
    $result .= "</td>" unless $beginofline;
    $result .= "</tr>" unless $vertical;
    $result .= "</table>\n";
    if ($web_manual) {
      return "\n";
    } else {
      return $result;
    }
}


@Texi2HTML::Config::SECTION_BUTTONS =
    ('left-aligned-cell-1', 'FastBack',
     'center-aligned-cell-3', 'Top', 'Contents', 'Index', 'About',
     'right-aligned-cell-1', 'FastForward',
     'newline',
     'left-aligned-cell-2', 'Back',
     'center-aligned-cell-1', 'Up',
     'right-aligned-cell-2', 'Forward'
    );

# buttons for misc stuff
@Texi2HTML::Config::MISC_BUTTONS = ('center-aligned-cell-3',
				    'Top', 'Contents', 'Index', 'About');

# buttons for chapter file footers
# (and headers but only if SECTION_NAVIGATION is false)
@Texi2HTML::Config::CHAPTER_BUTTONS =
    ('left-aligned-cell-1', 'FastBack',
     'center-aligned-cell-3', 'Top', 'Contents', 'Index', 'About',
     'right-aligned-cell-1', 'FastForward',
    );

# buttons for section file footers
@Texi2HTML::Config::SECTION_FOOTER_BUTTONS =
    ('left-aligned-cell-1', 'FastBack',
     'center-aligned-cell-3', 'Top', 'Contents', 'Index', 'About',
     'right-aligned-cell-1', 'FastForward',
     'newline',
     'left-aligned-cell-2', 'Back',
     'center-aligned-cell-1', 'Up',
     'right-aligned-cell-2', 'Forward'
    );

@Texi2HTML::Config::NODE_FOOTER_BUTTONS =
    ('left-aligned-cell-1', 'FastBack',
     'center-aligned-cell-3', 'Top', 'Contents', 'Index', 'About',
     'right-aligned-cell-1', 'FastForward',
     'newline',
     'left-aligned-cell-2', 'Back',
     'center-aligned-cell-1', 'Up',
     'right-aligned-cell-2', 'Forward'
    );





#############################################################################
###  FOOTNOTE FORMATTING
#############################################################################

# Format footnotes in a nicer way: Instead of printing the number in a separate
# (nr) heading line, use the standard way of prepending <sup>nr</sup> immediately
# before the fn text.


# The following code is copied from texi2html's examples/makeinfo.init and
# should be updated when texi2html makes some changes there!

my $makekinfo_like_footnote_absolute_number = 0;

sub makeinfo_like_foot_line_and_ref($$$$$$$$)
{
    my $foot_num = shift;
    my $relative_num = shift;
    my $footid = shift;
    my $docid = shift;
    my $from_file = shift;
    my $footnote_file = shift;
    my $lines = shift;
    my $state = shift;

    $makekinfo_like_footnote_absolute_number++;

    # this is a bit obscure, this allows to add an anchor only if formatted
    # as part of the document.
    $docid = '' if ($state->{'outside_document'} or $state->{'multiple_pass'});

    if ($from_file eq $footnote_file)
    {
        $from_file = $footnote_file = '';
    }

    my $foot_anchor = "<sup>" .
	&$anchor($docid, "$footnote_file#$footid", $relative_num) . "</sup>";
    $foot_anchor = &$anchor($docid,
			    "$footnote_file#$footid",
			    "($relative_num)") if ($state->{'preformatted'});

#    unshift @$lines, "<li>";
#    push @$lines, "</li>\n";
    return ($lines, $foot_anchor);
}

sub makeinfo_like_foot_lines($)
{
    my $lines = shift;
    unshift @$lines, "<hr>\n<h4>$Texi2HTML::I18n::WORDS->{'Footnotes_Title'}</h4>\n";
#<ol type=\"1\">\n";
#    push @$lines, "</ol>";
    return $lines;
}

my %makekinfo_like_paragraph_in_footnote_nr;

sub makeinfo_like_paragraph ($$$$$$$$$$$$$)
{
    my $text = shift;
    my $align = shift;
    my $indent = shift;
    my $paragraph_command = shift;
    my $paragraph_command_formatted = shift;
    my $paragraph_number = shift;
    my $format = shift;
    my $item_nr = shift;
    my $enumerate_style = shift;
    my $number = shift;
    my $command_stack_at_end = shift;
    my $command_stack_at_begin = shift;
    my $state = shift;
#print STDERR "format: $format\n" if (defined($format));
#print STDERR "paragraph @$command_stack_at_end; @$command_stack_at_begin\n";
    $paragraph_command_formatted = '' if (!defined($paragraph_command_formatted) or
          exists($special_list_commands{$format}->{$paragraph_command}));
    return '' if ($text =~ /^\s*$/);
    foreach my $style(t2h_collect_styles($command_stack_at_begin))
    {
       $text = t2h_begin_style($style, $text);
    }
    foreach my $style(t2h_collect_styles($command_stack_at_end))
    {
       $text = t2h_end_style($style, $text);
    }
    if (defined($paragraph_number) and defined($$paragraph_number))
    {
         $$paragraph_number++;
         return $text  if (($format eq 'itemize' or $format eq 'enumerate') and
            ($$paragraph_number == 1));
    }
    # The cells of a table should not be wrapped in a <p> tag, so just return the text
    if (defined($command_stack_at_begin->[0]) and $command_stack_at_begin->[0] eq 'multitable')
    {
        return $text;
    }

    # Adjust all footnotes so that they look like good old makeinfo
    my $open = '<p';
    if ($align)
    {
        $open .= " align=\"$paragraph_style{$align}\"";
    }
    my $footnote_text = '';
    if (defined($command_stack_at_begin->[0]) and $command_stack_at_begin->[0] eq 'footnote')
    {
        my $state = $Texi2HTML::THISDOC{'state'};
        $makekinfo_like_paragraph_in_footnote_nr{$makekinfo_like_footnote_absolute_number}++;
        if ($makekinfo_like_paragraph_in_footnote_nr{$makekinfo_like_footnote_absolute_number} <= 1)
        {
           $open.=' class="footnote"';
           my $document_file = $state->{'footnote_document_file'};
           if ($document_file eq $state->{'footnote_footnote_file'})
           {
               $document_file = '';
           }
           my $docid = $state->{'footnote_place_id'};
           my $doc_state = $state->{'footnote_document_state'};
           $docid = '' if ($doc_state->{'outside_document'} or $doc_state->{'multiple_pass'});
           my $foot_label = &$anchor($state->{'footnote_footnote_id'},
                 $document_file . "#$state->{'footnote_place_id'}",
                 "$state->{'footnote_number_in_page'}");
           $footnote_text = "<small>[${foot_label}]</small> ";
        }
    }
    return $open.'>'.$footnote_text.$text.'</p>';
}


#############################################################################
###  WRITING OUT THE INDEX FOR THE AJAX SEARCH FIELD
#############################################################################

$Texi2HTML::Config::IDX_SUMMARY   = 1;
$Texi2HTML::Config::init_out                  = \&lilypond_init_out;
$Texi2HTML::Config::finish_out                = \&lilypond_finish_out;
$Texi2HTML::Config::index_summary_file_entry  = \&lilypond_index_summary_file_entry;

my @index_entries;

sub lilypond_init_out ()
{
  t2h_default_init_out ();
  # Check whether we have an index at all! If not -> don't print out a search box!
  my $ix = main::get_index ("cp");
  $have_index_entries = (scalar $ix > 0);
}

sub lilypond_index_summary_file_entry ($$$$$$$$$)
{
  my $index_name = shift;
  my $entry_text = shift;
  my $entry_reference = shift;
  my $formatted_entry = shift;
  my $texi_entry = shift;
  my $entry_element_reference = shift;
  my $entry_element_header = shift;
  my $is_printed = shift;
  my $manual_name = shift;

  if ($ENV{'AJAX_SEARCH'}==1) {
    if ($index_name eq "cp")
    {
      # The entries in the index file have the form:
      # SearchText \t FormattedText \t EntryURL \t SectionText \t SectionURL
      push @index_entries, "$entry_text\t$formatted_entry\t$entry_reference\t$entry_element_header\t$entry_element_reference\n";
    }
  }
}

sub lilypond_finish_out ()
{
  if ($ENV{'AJAX_SEARCH'}==1) {
    if (((scalar @index_entries) > 0) and $have_index_entries) {
      my $lang = $Texi2HTML::THISDOC{current_lang};
      my $big = "";
      $big = "-big-page" if $bigpage;
      my ($docu_dir, $docu_name) = split_texi_filename ($Texi2HTML::THISDOC{'input_file_name'});
      my $idx_file = "$docu_dir/$docu_name$big.$lang.idx";
      open IDXOUTFILE, ">:utf8", $idx_file;
      print IDXOUTFILE @index_entries;
      close IDXOUTFILE;
    }
  }
}



#############################################################################
###  OTHER SETTINGS
#############################################################################

# For split pages, use index.html as start page!
if ($Texi2HTML::Config::SPLIT eq 'section' or
    $Texi2HTML::Config::SPLIT eq 'node') {
  $Texi2HTML::Config::TOP_FILE = 'index.html';
}


return 1;
