#!/usr/bin/env perl
### texi2html customization script for Lilypond
### Author: Reinhold Kainhofer , 2008.
### Some code parts copied from texi2html and adapted.
### License: GPLv2+
###
###
### 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,
### impelmented by lilypond_css_lines
### -) TOC (folded, with the current page highlighted) in an iframe 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
### 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...)
### split_at_numbered_sections (correct file name: use the map)
### lilypond_init_out (read in the externally created map from disk)
### lilypond_external_href (load the map for xrefs, use the correct
### link target)
###
###
### 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 Texi2HTML::Config;
#############################################################################
### SETTINGS FOR TEXI2HTML
#############################################################################
@Texi2HTML::Config::CSS_REFS = ("lilypond.css");
$Texi2HTML::Config::USE_ACCESSKEY = 1;
$Texi2HTML::Config::USE_LINKS = 1;
$Texi2HTML::Config::USE_REL_REV = 1;
$Texi2HTML::Config::element_file_name = \&split_at_numbered_sections;
$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;
$Texi2HTML::Config::external_href = \&lilypond_external_href;
$Texi2HTML::Config::toc_body = \&lilypond_toc_body;
$Texi2HTML::Config::css_lines = \&lilypond_css_lines;
$Texi2HTML::Config::init_out = \&lilypond_init_out;
$Texi2HTML::Config::unknown = \&lilypond_unknown;
$Texi2HTML::Config::print_page_head = \&lilypond_print_page_head;
# Examples should be formatted similar to quotes:
$Texi2HTML::Config::complex_format_map->{'example'} = {
'begin' => q{"
"},
'end' => q{"
\n"},
};
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
#############################################################################
# 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 $result
}
# Load a file containing a nodename<=>filename map (tab-sepatared, i.e.
# NODENAME\tFILENAME\tANCHOR
# Returns a ref to a hash "Node title" => ["FilenameWithoutExt", "Anchor"]
sub load_map_file ($)
{
my $mapfile = shift;
my $node_map = ();
# TODO: Load and parse the file
if (open(XREFFILE, $mapfilename)) {
@nodelist = ;
close (XREFFILE);
# parse the tab-separated entries and insert them into the map:
foreach $node (@nodelist) {
chomp($node);
my @entries = split(/\t/, $node);
if (length (@entries) == 3) {
$node_map->{$entries[0]} = [$entries[1], $entries[2]];
} else {
print STDERR "Invalid entry in the node file $mapfile: $node\n";
}
}
} else {
print STDERR "Unable to load the map file $mapfile\n";
}
return $node_map;
}
#############################################################################
### 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 ($$)
{
my $import_lines = shift;
my $rule_lines = shift;
return if (defined($CSS_LINES));
if (@$rule_lines or @$import_lines)
{
$CSS_LINES = "\n";
}
foreach my $ref (@CSS_REFS)
{
$CSS_LINES .= "\n";
}
$CSS_LINES .= "\n";
}
#############################################################################
### SPLITTING BASED ON NUMBERED SECTIONS
#############################################################################
my $lastfilename;
my $docnr = 0;
my $node_to_filename_map = ();
# This function makes sure that files are only generated for numbered sections,
# but not for unnumbered ones. It is called after texi2html has done its own
# splitting and simply returns the filename for the node given as first argument
# Nodes with the same filename will be printed out to the same filename, so
# this really all we need. Also, make sure that the file names for sections
# are derived from the section title. We also might want to name the anchors
# according to node titles, which works by simply overriding the id element of
# the $element hash.
# If an external nodename<=>filename/anchor map file is found (loaded in
# lilypond_init_out, use the externally created values, otherwise use the
# same logic here.
sub split_at_numbered_sections($$$)
{
my $element = shift;
my $type = shift;
my $docu_name = shift;
my $docu_ext = $Texi2HTML::Config::EXTENSION;
my $node_name = $element->{'node_ref'}->{'no_texi'};
if (exists ($node_to_filename_map->{$node_name})) {
(my $filename, my $anchor) = @$node_to_filename_map->{$node_name};
$filename .= ".$docu_ext" if (defined($docu_ext));
# TODO: Does this work?
print "Stored target: " + $node_to_filename_map->{$node_name};
$element->{id} = $anchor;
if ($filename == $lastfilename) {
$$element{doc_nr} = $docnr;
} else {
$docnr += 1;
$$element{doc_nr} = $docnr;
$lastfilename = $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") {
# TOC, footer, about etc. are called with undefined $element and $type == "toc"|"stoc"|"foot"|"about"
return;
} else {
# 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!
# TODO: lookup node name in nodename<=>filename map
# derive the name of the anchor (i.e. the part after # in the links!),
# don't use texi2html's SECx.x default!
my $sec_name = main::remove_texi($element->{'texi'});
if ($element->{'node_ref'}->{'texi'} ne '') { # if we have a node, use its name:
$sec_name = main::remove_texi($element->{'node_ref'}->{'texi'});
}
my $anchor = $sec_name;
if ($$element{translationof}) {
$anchor = main::remove_texi($$element{translationof});
}
# normalize to the same file name as texinfo
$anchor = texinfo_file_name($anchor);
$$element{id} = $anchor;
# Numbered sections will get a filename Node_title, unnumbered sections will use
# the file name of the previous numbered section:
if (($element->{number}) or ($lastfilename eq '') or ($element->{level} == 1)) {
my $filename = $anchor;
$filename .= ".$docu_ext" if (defined($docu_ext));
$docnr += 1;
$$element{doc_nr} = $docnr;
$lastfilename = $filename;
return $filename;
} else {
$$element{doc_nr} = $docnr;
return $lastfilename;
}
}
return;
}
sub lilypond_init_out ()
{
t2h_default_init_out ();
# TODO: find correct path to the map file
# my $map_filename = "$Texi2HTML::THISDOC{'destination_directory'}$Texi2HTML::THISDOC{'file_base_name'}_xref.map";
my $map_filename = "$Texi2HTML::THISDOC{'file_base_name'}_xref.map";
$node_to_filename_map = load_map_file ($map_filename);
}
#############################################################################
### CLEANER LINK TITLE FOR EXTERNAL REFS
#############################################################################
# The default formatting of external refs returns e.g.
# "(lilypond-internals)Timing_translator", so we remove all (...) from the
# file_and_node argument. Also, we want only a very simple format, so we don't
# even call the default handler!
sub lilypond_external_ref($$$$$$)
{
my $type = shift;
my $section = shift;
my $book = shift;
my $file_node = shift;
my $href = shift;
my $cross_ref = shift;
$file_node =~ s/\(.*\)//;
$file_node = &$anchor('', $href, $file_node) if ($file_node ne '');
return &$I('%{node_file_href}', { 'node_file_href' => $file_node });
# Default: format as "see NODE section 'SECTION' in BOOK". We don't want this!
# return t2h_default_external_ref($type, $section, $book, $file_node, $href, $cross_ref);
}
#############################################################################
### 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($$$$$)
{
my $macro = shift;
my $line = shift;
my $pass = shift;
my $stack = shift;
my $state = shift;
# the @translationof macro provides the original English section title,
# which should be used for file/anchor naming, while the title will be
# translated to each language
# It is already used by extract_texi_filenames.py, so this should not be
# necessary here at all. Still, I'll leave the code in just in case the
# python script messed up ;-)
if ($pass == 1 and $macro eq "translationof") {
if (ref($state->{'element'})=='HASH') {
$state->{'element'}->{'translationof'} = main::normalise_space($line);
}
return ('', true, undef, undef);
} else {
return t2h_default_unknown($macro, $line, $pass, $stack, $state);
}
}
my %translated_books = ();
# Construct a href to an external source of information.
# node is the node with texinfo @-commands
# node_id is the node transliterated and transformed as explained in the
# texinfo manual
# node_xhtml_id is the node transformed such that it is unique and can
# be used to make an html cross ref as explained in the texinfo manual
# file is the file in '(file)node'
sub lilypond_external_href($$$)
{
my $node = shift;
my $node_id = shift;
my $node_xhtml_id = shift;
my $file = shift;
my $original_func = \&t2h_default_external_href;
# TODO:
# 1) Keep a hash of book->section_map
# 2) if not file in keys hash => try to load the map (assign empty map is non-existent => will load only once!)
# 3) if node in the section=>(file, anchor) map, replace node_id and node_xhtml_id by the map's values
# 4) call the t2h_default_external_href with these values (or the old ones if not found)
print STDERR "lilypond_external_href: texi_node='$node', node_file='$node_id', node_xhtml_id='$node_xhtml_id', file='$file'\n";
if (($node_id ne '') and defined($file)) {
if (!exists($translated_books{$file})) {
print STDERR "Map for book $file not yet loaded, trying to initialize\n";
# TODO: Load the file...
$translated_books{$file}={};
}
my $section_name_map = $translated_books{$file};
if (exists($section_name_map->{$node_id})) {
print STDERR "Found key $node_id in section_name_map\n";
# TODO: Assign the new values to $file, $node_id and $node_xhtml_id!
# TODO: Am I doing this right?
(my $filename, my $anchor) = @$section_name_map->{$node_id};
$filename .= ".$docu_ext" if (defined($docu_ext));
print "Stored target: " + $node_to_filename_map->{$node_name};
$node_xhtml_id = $anchor;
$file = $filename;
} else {
print STDERR "Unable to find key $node_id in section_name_map\n";
}
}
# Code copied from texi2html:
# I'll need to find the correct path to the map file and texi2html already
# seems to do a good job for this with the following code, which I will
# need to strip down to those parts that we really need:
#
# $file = '' if (!defined($file));
# my $default_target_split = $EXTERNAL_CROSSREF_SPLIT;
# my $target_split;
# my $target_mono;
# my $href_split;
# my $href_mono;
# if ($file ne '')
# {
# if ($NEW_CROSSREF_STYLE)
# {
# $file =~ s/\.[^\.]*$//;
# $file =~ s/^.*\///;
# my $href;
# if (exists($Texi2HTML::THISDOC{'htmlxref'}->{$file}))
# {
# if (exists($Texi2HTML::THISDOC{'htmlxref'}->{$file}->{'split'}))
# {
# $target_split = 1;
# $href_split = $Texi2HTML::THISDOC{'htmlxref'}->{$file}->{'split'}->{'href'};
# }
# if (exists($Texi2HTML::THISDOC{'htmlxref'}->{$file}->{'mono'}))
# {
# $target_mono = 1;
# $href_mono = $Texi2HTML::THISDOC{'htmlxref'}->{$file}->{'mono'}->{'href'};
# }
# }
#
# if ((not $target_mono) and (not $target_split))
# { # nothing specified for that manual, use default
# $target_split = $default_target_split;
# }
# elsif ($target_split and $target_mono)
# { # depends on the splitting of the manual
# $target_split = $SPLIT;
# }
# elsif ($target_mono)
# { # only mono specified
# $target_split = 0;
# }
#
# if ($target_split)
# {
# if (defined($href_split))
# {
# $file = "$href_split";
# }
# elsif (defined($EXTERNAL_DIR))
# {
# $file = "$EXTERNAL_DIR/$file";
# }
# elsif ($SPLIT)
# {
# $file = "../$file";
# }
# $file .= "/";
# }
# else
# {# target not split
# if (defined($href_mono))
# {
# $file = "$href_mono";
# }
# else
# {
# if (defined($EXTERNAL_DIR))
# {
# $file = "$EXTERNAL_DIR/$file";
# }
# elsif ($SPLIT)
# {
# $file = "../$file";
# }
# $file .= "." . $NODE_FILE_EXTENSION;
# }
# }
# }
# else
# {
# $file .= "/";
# if (defined($EXTERNAL_DIR))
# {
# $file = $EXTERNAL_DIR . $file;
# }
# else
# {
# $file = '../' . $file;
# }
# }
# }
# else
# {
# $target_split = $default_target_split;
# }
# if ($node eq '')
# {
# if ($NEW_CROSSREF_STYLE)
# {
# if ($target_split)
# {
# return $file . $TOP_NODE_FILE . '.' . $NODE_FILE_EXTENSION . '#Top';
# # or ?
# #return $file . '#Top';
# }
# else
# {
# return $file . '#Top';
# }
# }
# else
# {
# return $file;
# }
# }
# my $target;
# if ($NEW_CROSSREF_STYLE)
# {
# $node = $node_id;
# $target = $node_xhtml_id;
# }
# else
# {
# $node = main::remove_texi($node);
# $node =~ s/[^\w\.\-]/-/g;
# }
# my $file_basename = $node;
# $file_basename = $TOP_NODE_FILE if ($node =~ /^top$/i);
# if ($NEW_CROSSREF_STYLE)
# {
# if ($target_split)
# {
# return $file . $file_basename . ".$NODE_FILE_EXTENSION" . '#' . $target;
# }
# else
# {
# return $file . '#' . $target;
# }
# }
# else
# {
# return $file . $file_basename . ".$NODE_FILE_EXTENSION";
# }
if (defined $file) {
return &$original_func($node, $node_id, $node_hxmlt_id, $file);
} else {
return &$original_func($node, $node_id, $node_hxmlt_id);
}
}
#############################################################################
### CUSTOM TOC FOR EACH PAGE (in a frame on the left)
#############################################################################
my $page_toc_depth = 2;
my @default_toc = [];
# 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 their
# parent element is an ancestor of the currently viewed node.
sub generate_ly_toc_entries($$$$)
{
my $element = shift;
my $element_path = shift;
my $maxlevel = shift;
my $always_show_unnumbered_children = 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 $print_children = ( ($level < $maxlevel) or $is_parent_of_current );
my $ind = ' ' x $level;
my $this_css_class = $is_parent_of_current ? " class=\"toc_current\"" : "";
my $entry = "$ind
" . &$anchor ($element->{'tocid'}, "$element->{'file'}#$element->{'id'}",$element->{'text'});
my $children = $element->{'section_childs'};
# Don't add unnumbered entries, unless they are at top-level or a parent of the current!
if (not ($element->{'number'} or $always_show_unnumbered_children)) {
return @result;
}
if ( $print_children and defined($children) and (ref($children) eq "ARRAY") ) {
push (@result, $entry);
my @child_result = ();
foreach (@$children) {
push (@child_result, generate_ly_toc_entries($_, $element_path, $maxlevel, $is_parent_of_current));
}
# 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
\n");
}
} else {
push (@result, $entry . "\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'};
}
return () if not defined($current_element);
# Create the toc entries recursively
my @toc_entries = ("
\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
\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 $fh = shift;
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 T2H_DEFAULT_print_element_header( $fh, $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 T2H_GPL_toc_body($elements_list);
}
# Print out the TOC in a
at the beginning of the page
sub lilypond_print_page_head($)
{
my $fh = shift;
T2H_DEFAULT_print_page_head($fh);
print $fh "
\n";
}
# Print out the TOC in a
at the end of th page, which will be formatted as a
# sidebar mimicking a TOC frame
sub print_lilypond_page_foot($)
{
my $fh = shift;
my $program_string = &$program_string();
print $fh "
$program_string $PRE_BODY_CLOSE
\n";
print $fh "\n\n";
print $fh "\n
\n\n";
# Print the TOC frame and reset the TOC:
lilypond_print_toc_div ($fh, \@this_page_toc);
@this_page_toc = ();
# Close the page:
print $fh "