1671 lines
54 KiB
Perl
Executable File
1671 lines
54 KiB
Perl
Executable File
#! /usr/bin/env perl -w
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# html2texi.pl -- Convert HTML documentation to Texinfo format
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# Michael Ernst <mernst@cs.washington.edu>
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# Time-stamp: <1998-09-10 12:52:38 mernst>
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# This program converts HTML documentation trees into Texinfo format.
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# Given the name of a main (or contents) HTML file, it processes that file,
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# and other files (transitively) referenced by it, into a Texinfo file
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# (whose name is chosen from the file or directory name of the argument).
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# For instance:
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# html2texi.pl api/index.pl
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# produces file "api.texi".
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# Texinfo format can be easily converted to Info format (for browsing in
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# Emacs or the standalone Info browser), to a printed manual, or to HTML.
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# Thus, html2texi.pl permits conversion of HTML files to Info format, and
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# secondarily enables producing printed versions of Web page hierarchies.
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# Unlike HTML, Info format is searchable. Since Info is integrated into
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# Emacs, one can read documentation without starting a separate Web
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# browser. Additionally, Info browsers (including Emacs) contain
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# convenient features missing from Web browsers, such as easy index lookup
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# and mouse-free browsing.
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# Limitations:
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# html2texi.pl is currently tuned to latex2html output, but should be
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# extensible to arbitrary HTML documents. It will be most useful for HTML
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# with a hierarchical structure and an index. The HTML tree to be
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# traversed must be on local disk, rather than being accessed via HTTP.
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# This script requires the use of "checkargs.pm". To eliminate that
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# dependence, replace calls to check_args* by @_ (which is always the last
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# argument to those functions).
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# Also see the "to do" section, below.
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# Comments, suggestions, bug fixes, and enhancements are welcome.
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###
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### Typical usage for the Python documentation:
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###
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# (Actually, most of this is in a Makefile instead.)
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# The resulting Info format Python documentation is currently available at
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# ftp://ftp.cs.washington.edu/homes/mernst/python-info.tar.gz
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# Fix up HTML problems, eg <DL COMPACT><DD>
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# html2texi.pl /homes/fish/mernst/tmp/python-doc/html/api/index.html
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# html2texi.pl /homes/fish/mernst/tmp/python-doc/html/ext/index.html
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# html2texi.pl /homes/fish/mernst/tmp/python-doc/html/lib/index.html
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# html2texi.pl /homes/fish/mernst/tmp/python-doc/html/mac/index.html
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# html2texi.pl /homes/fish/mernst/tmp/python-doc/html/ref/index.html
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# html2texi.pl /homes/fish/mernst/tmp/python-doc/html/tut/index.html
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# Edit the generated .texi files:
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# * change @setfilename to prefix "python-"
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# * fix up any sectioning, such as for Abstract
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# * make Texinfo menus
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# * perhaps remove the @detailmenu ... @end detailmenu
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# In Emacs:
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# (progn (goto-char (point-min)) (replace-regexp "\\(@setfilename \\)\\([-a-z]*\\)$" "\\1python-\\2.info") (replace-string "@node Front Matter\n@chapter Abstract\n" "@node Abstract\n@section Abstract\n") (progn (mark-whole-buffer) (texinfo-master-menu 'update-all-nodes)) (save-buffer))
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# makeinfo api.texi
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# makeinfo ext.texi
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# makeinfo lib.texi
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# makeinfo mac.texi
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# makeinfo ref.texi
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# makeinfo tut.texi
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###
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### Structure of the code
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###
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# To be written...
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###
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### Design decisions
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###
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# Source and destination languages
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# --------------------------------
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#
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# The goal is Info files; I create Texinfo, so I don't have to worry about
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# the finer details of Info file creation. (I'm not even sure of its exact
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# format.)
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#
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# Why not start from LaTeX rather than HTML?
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# I could hack latex2html itself to produce Texinfo instead, or fix up
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# partparse.py (which already translates LaTeX to Teinfo).
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# Pros:
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# * has high-level information such as index entries, original formatting
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# Cons:
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# * those programs are complicated to read and understand
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# * those programs try to handle arbitrary LaTeX input, track catcodes,
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# and more: I don't want to go to that effort. HTML isn't as powerful
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# as LaTeX, so there are fewer subtleties.
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# * the result wouldn't work for arbitrary HTML documents; it would be
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# nice to eventually extend this program to HTML produced from Docbook,
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# Frame, and more.
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# Parsing
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# -------
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#
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# I don't want to view the text as a linear stream; I'd rather parse the
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# whole thing and then do pattern matching over the parsed representation (to
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# find idioms such as indices, lists of child nodes, etc.).
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# * Perl provides HTML::TreeBuilder, which does just what I want.
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# * libwww-perl: http://www.linpro.no/lwp/
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# * TreeBuilder: HTML-Tree-0.51.tar.gz
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# * Python Parsers, Formatters, and Writers don't really provide the right
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# interface (and the version in Grail doesn't correspond to another
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# distributed version, so I'm confused about which to be using). I could
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# write something in Python that creates a parse tree, but why bother?
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# Other implementation language issues:
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# * Python lacks variable declarations, reasonable scoping, and static
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# checking tools. I've written some of the latter for myself that make
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# my Perl programming a lot safer than my Python programming will be until
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# I have a similar suite for that language.
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###########################################################################
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### To do
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###
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# Section names:
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# Fix the problem with multiple sections in a single file (eg, Abstract in
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# Front Matter section).
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# Deal with cross-references, as in /homes/fish/mernst/tmp/python-doc/html/ref/types.html:310
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# Index:
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# Perhaps double-check that every tag mentioned in the index is found
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# in the text.
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# Python: email to python-docs@python.org, to get their feedback.
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# Compare to existing lib/ Info manual
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# Write the hooks into info-look; replace pyliblookup1-1.tar.gz.
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# Postpass to remove extra quotation marks around typography already in
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# a different font (to avoid double delimiters as in "`code'"); or
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# perhaps consider using only font-based markup so that we don't get
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# the extra *bold* and `code' markup in Info.
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## Perhaps don't rely on automatic means for adding up, next, prev; I have
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## all that info available to me already, so it's not so much trouble to
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## add it. (Right?) But it is *so* easy to use Emacs instead...
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###########################################################################
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### Strictures
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###
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# man HTML::TreeBuilder
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# man HTML::Parser
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# man HTML::Element
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# require HTML::ParserWComment;
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require HTML::Parser;
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require HTML::TreeBuilder;
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require HTML::Element;
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use File::Basename;
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use Cwd;
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use strict;
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# use Carp;
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use checkargs;
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###########################################################################
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### Variables
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###
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my @section_stack = (); # elements are chapter/section/subsec nodetitles (I think)
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my $current_ref_tdf; # for the file currently being processed;
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# used in error messages
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my $html_directory;
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my %footnotes;
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# First element should not be used.
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my @sectionmarker = ("manual", "chapter", "section", "subsection", "subsubsection");
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my %inline_markup = ("b" => "strong",
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"code" => "code",
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"i" => "emph",
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"kbd" => "kbd",
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"samp" => "samp",
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"strong" => "strong",
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"tt" => "code",
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"var" => "var");
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my @deferred_index_entries = ();
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my @index_titles = (); # list of (filename, type) lists
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my %index_info = ("Index" => ["\@blindex", "bl"],
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"Concept Index" => ["\@cindex", "cp"],
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"Module Index" => ["\@mdindex", "md"]);
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###########################################################################
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### Main/contents page
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###
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# Process first-level page on its own, or just a contents page? Well, I do
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# want the title, author, etc., and the front matter... For now, just add
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# that by hand at the end.
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# data structure possibilities:
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# * tree-like (need some kind of stack when processing (or parent pointers))
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# * list of name and depth; remember old and new depths.
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# Each element is a reference to a list of (nodetitle, depth, filename).
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my @contents_list = ();
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# The problem with doing fixups on the fly is that some sections may have
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# already been processed (and no longer available) by the time we notice
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# others with the same name. It's probably better to fully construct the
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# contents list (reading in all files of interest) upfront; that will also
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# let me do a better job with cross-references, because again, all files
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# will already be read in.
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my %contents_hash = ();
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my %contents_fixups = ();
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my @current_contents_list = ();
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# Merge @current_contents_list into @contents_list,
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# and set @current_contents_list to be empty.
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sub merge_contents_lists ( )
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{ check_args(0, @_);
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# Three possibilities:
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# * @contents_list is empty: replace it by @current_contents_list.
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# * prefixes of the two lists are identical: do nothing
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# * @current_contents_list is all at lower level than $contents_list[0];
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# prefix @contents_list by @current_contents_list
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if (scalar(@current_contents_list) == 0)
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{ die "empty current_contents_list"; }
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# if (scalar(@contents_list) == 0)
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# { @contents_list = @current_contents_list;
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# @current_contents_list = ();
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# return; }
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# if (($ {$contents_list[0]}[1]) < ($ {$current_contents_list[0]}[1]))
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# { unshift @contents_list, @current_contents_list;
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# @current_contents_list = ();
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# return; }
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for (my $i=0; $i<scalar(@current_contents_list); $i++)
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{ my $ref_c_tdf = $current_contents_list[$i];
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if ($i >= scalar(@contents_list))
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{ push @contents_list, $ref_c_tdf;
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my $title = $ {$ref_c_tdf}[0];
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if (defined $contents_hash{$title})
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{ $contents_fixups{$title} = 1; }
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else
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{ $contents_hash{$title} = 1; }
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next; }
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my $ref_tdf = $contents_list[$i];
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my ($title, $depth, $file) = @{$ref_tdf};
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my ($c_title, $c_depth, $c_file) = @{$ref_c_tdf};
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if (($title ne $c_title)
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&& ($depth < $c_depth)
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&& ($file ne $c_file))
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{ splice @contents_list, $i, 0, $ref_c_tdf;
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if (defined $contents_hash{$c_title})
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{ $contents_fixups{$c_title} = 1; }
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else
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{ $contents_hash{$c_title} = 1; }
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next; }
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if (($title ne $c_title)
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|| ($depth != $c_depth)
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|| ($file ne $c_file))
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{ die ("while processing $ {$current_ref_tdf}[2] at depth $ {$current_ref_tdf}[1], mismatch at index $i:",
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"\n main: <<<$title>>> $depth $file",
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"\n curr: <<<$c_title>>> $c_depth $c_file"); }
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}
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@current_contents_list = ();
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}
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# Set @current_contents_list to a list of (title, href, sectionlevel);
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# then merge that list into @contents_list.
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# Maybe this function should also produce a map
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# from title (or href) to sectionlevel (eg "chapter"?).
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sub process_child_links ( $ )
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{ my ($he) = check_args(1, @_);
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# $he->dump;
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if (scalar(@current_contents_list) != 0)
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{ die "current_contents_list nonempty: @current_contents_list"; }
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$he->traverse(\&increment_current_contents_list, 'ignore text');
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# Normalize the depths; for instance, convert 1,3,5 into 0,1,2.
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my %depths = ();
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for my $ref_tdf (@current_contents_list)
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{ $depths{$ {$ref_tdf}[1]} = 1; }
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my @sorted_depths = sort keys %depths;
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my $current_depth = scalar(@section_stack)-1;
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my $current_depth_2 = $ {$current_ref_tdf}[1];
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if ($current_depth != $current_depth_2)
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{ die "mismatch in current depths: $current_depth $current_depth_2; ", join(", ", @section_stack); }
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for (my $i=0; $i<scalar(@sorted_depths); $i++)
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{ $depths{$sorted_depths[$i]} = $i + $current_depth+1; }
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for my $ref_tdf (@current_contents_list)
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{ $ {$ref_tdf}[1] = $depths{$ {$ref_tdf}[1]}; }
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# Eliminate uninteresting sections. Hard-coded hack for now.
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if ($ {$current_contents_list[-1]}[0] eq "About this document ...")
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{ pop @current_contents_list; }
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if ((scalar(@current_contents_list) > 1)
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&& ($ {$current_contents_list[1]}[0] eq "Contents"))
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{ my $ref_first_tdf = shift @current_contents_list;
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$current_contents_list[0] = $ref_first_tdf; }
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for (my $i=0; $i<scalar(@current_contents_list); $i++)
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{ my $ref_tdf = $current_contents_list[$i];
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my $title = $ {$ref_tdf}[0];
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if (exists $index_info{$title})
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{ my $index_file = $ {$ref_tdf}[2];
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my ($indexing_command, $suffix) = @{$index_info{$title}};
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process_index_file($index_file, $indexing_command);
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print TEXI "\n\@defindex $suffix\n";
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push @index_titles, $title;
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splice @current_contents_list, $i, 1;
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$i--; }
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elsif ($title =~ /\bIndex$/)
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{ print STDERR "Warning: \"$title\" might be an index; if so, edit \%index_info.\n"; } }
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merge_contents_lists();
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# print_contents_list();
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# print_index_info();
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}
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sub increment_current_contents_list ( $$$ )
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{ my ($he, $startflag, $depth) = check_args(3, @_);
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if (!$startflag)
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{ return; }
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if ($he->tag eq "li")
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{ my @li_content = @{$he->content};
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if ($li_content[0]->tag ne "a")
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{ die "first element of <LI> should be <A>"; }
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my ($name, $href, @content) = anchor_info($li_content[0]);
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# unused $name
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my $title = join("", collect_texts($li_content[0]));
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$title = texi_remove_punctuation($title);
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# The problem with these is that they are formatted differently in
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# @menu and @node!
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$title =~ s/``/\"/g;
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$title =~ s/''/\"/g;
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$title =~ s/ -- / /g;
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push @current_contents_list, [ $title, $depth, $href ]; }
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return 1;
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}
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# Simple version for section titles
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sub html_to_texi ( $ )
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{ my ($he) = check_args(1, @_);
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if (!ref $he)
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{ return $he; }
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my $tag = $he->tag;
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if (exists $inline_markup{$tag})
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{ my $result = "\@$inline_markup{$tag}\{";
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for my $elt (@{$he->content})
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{ $result .= html_to_texi($elt); }
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$result .= "\}";
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return $result; }
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else
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{ $he->dump;
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die "html_to_texi confused by <$tag>"; }
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}
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sub print_contents_list ()
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{ check_args(0, @_);
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print STDERR "Contents list:\n";
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for my $ref_tdf (@contents_list)
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{ my ($title, $depth, $file) = @{$ref_tdf};
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print STDERR "$title $depth $file\n"; }
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}
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###########################################################################
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### Index
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###
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my $l2h_broken_link_name = "l2h-";
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# map from file to (map from anchor name to (list of index texts))
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# (The list is needed when a single LaTeX command like \envvar
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# expands to multiple \index commands.)
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my %file_index_entries = ();
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my %this_index_entries; # map from anchor name to (list of index texts)
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my %file_index_entries_broken = (); # map from file to (list of index texts)
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my @this_index_entries_broken;
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my $index_prefix = "";
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my @index_prefixes = ();
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my $this_indexing_command;
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sub print_index_info ()
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{ check_args(0, @_);
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my ($key, $val);
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for my $file (sort keys %file_index_entries)
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{ my %index_entries = %{$file_index_entries{$file}};
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print STDERR "file: $file\n";
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for my $aname (sort keys %index_entries)
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{ my @entries = @{$index_entries{$aname}};
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if (scalar(@entries) == 1)
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{ print STDERR " $aname : $entries[0]\n"; }
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else
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{ print STDERR " $aname : ", join("\n " . (" " x length($aname)), @entries), "\n"; } } }
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for my $file (sort keys %file_index_entries_broken)
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{ my @entries = @{$file_index_entries_broken{$file}};
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print STDERR "file: $file\n";
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for my $entry (@entries)
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{ print STDERR " $entry\n"; }
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}
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}
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sub process_index_file ( $$ )
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{ my ($file, $indexing_command) = check_args(2, @_);
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# print "process_index_file $file $indexing_command\n";
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my $he = file_to_tree($html_directory . $file);
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# $he->dump();
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$this_indexing_command = $indexing_command;
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$he->traverse(\&process_if_index_dl_compact, 'ignore text');
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undef $this_indexing_command;
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# print "process_index_file done\n";
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}
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sub process_if_index_dl_compact ( $$$ )
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{ my ($he, $startflag) = (check_args(3, @_))[0,1]; # ignore depth argument
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if (!$startflag)
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{ return; }
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if (($he->tag() eq "dl") && (defined $he->attr('compact')))
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{ process_index_dl_compact($he);
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return 0; }
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else
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{ return 1; }
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}
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# The elements of a <DL COMPACT> list from a LaTeX2HTML index:
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# * a single space: text to be ignored
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# * <DT> elements with an optional <DD> element following each one
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# Two types of <DT> elements:
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# * Followed by a <DD> element: the <DT> contains a single
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# string, and the <DD> contains a whitespace string to be ignored, a
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# <DL COMPACT> to be recursively processed (with the <DT> string as a
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# prefix), and a whitespace string to be ignored.
|
|
# * Not followed by a <DD> element: contains a list of anchors
|
|
# and texts (ignore the texts, which are only whitespace and commas).
|
|
# Optionally contains a <DL COMPACT> to be recursively processed (with
|
|
# the <DT> string as a prefix)
|
|
sub process_index_dl_compact ( $ )
|
|
{ my ($h) = check_args(1, @_);
|
|
my @content = @{$h->content()};
|
|
for (my $i = 0; $i < scalar(@content); $i++)
|
|
{ my $this_he = $content[$i];
|
|
if ($this_he->tag ne "dt")
|
|
{ $this_he->dump;
|
|
die "Expected <DT> tag: " . $this_he->tag; }
|
|
if (($i < scalar(@content) - 1) && ($content[$i+1]->tag eq "dd"))
|
|
{ process_index_dt_and_dd($this_he, $content[$i+1]);
|
|
$i++; }
|
|
else
|
|
{ process_index_lone_dt($this_he); } } }
|
|
|
|
|
|
|
|
# Argument is a <DT> element. If it contains more than one anchor, then
|
|
# the texts of all subsequent ones are "[Link]". Example:
|
|
# <DT>
|
|
# <A HREF="embedding.html#l2h-201">
|
|
# "$PATH"
|
|
# ", "
|
|
# <A HREF="embedding.html#l2h-205">
|
|
# "[Link]"
|
|
# Optionally contains a <DL COMPACT> as well. Example:
|
|
# <DT>
|
|
# <A HREF="types.html#l2h-616">
|
|
# "attribute"
|
|
# <DL COMPACT>
|
|
# <DT>
|
|
# <A HREF="assignment.html#l2h-3074">
|
|
# "assignment"
|
|
# ", "
|
|
# <A HREF="assignment.html#l2h-3099">
|
|
# "[Link]"
|
|
# <DT>
|
|
# <A HREF="types.html#l2h-">
|
|
# "assignment, class"
|
|
|
|
sub process_index_lone_dt ( $ )
|
|
{ my ($dt) = check_args(1, @_);
|
|
my @dtcontent = @{$dt->content()};
|
|
my $acontent;
|
|
my $acontent_suffix;
|
|
for my $a (@dtcontent)
|
|
{ if ($a eq ", ")
|
|
{ next; }
|
|
if (!ref $a)
|
|
{ $dt->dump;
|
|
die "Unexpected <DT> string element: $a"; }
|
|
|
|
if ($a->tag eq "dl")
|
|
{ push @index_prefixes, $index_prefix;
|
|
if (!defined $acontent_suffix)
|
|
{ die "acontent_suffix not yet defined"; }
|
|
$index_prefix .= $acontent_suffix . ", ";
|
|
process_index_dl_compact($a);
|
|
$index_prefix = pop(@index_prefixes);
|
|
return; }
|
|
|
|
if ($a->tag ne "a")
|
|
{ $dt->dump;
|
|
$a->dump;
|
|
die "Expected anchor in lone <DT>"; }
|
|
|
|
my ($aname, $ahref, @acontent) = anchor_info($a);
|
|
# unused $aname
|
|
if (scalar(@acontent) != 1)
|
|
{ die "Expected just one content of <A> in <DT>: @acontent"; }
|
|
if (ref $acontent[0])
|
|
{ $acontent[0]->dump;
|
|
die "Expected string content of <A> in <DT>: $acontent[0]"; }
|
|
if (!defined($acontent))
|
|
{ $acontent = $index_prefix . $acontent[0];
|
|
$acontent_suffix = $acontent[0]; }
|
|
elsif (($acontent[0] ne "[Link]") && ($acontent ne ($index_prefix . $acontent[0])))
|
|
{ die "Differing content: <<<$acontent>>>, <<<$acontent[0]>>>"; }
|
|
|
|
if (!defined $ahref)
|
|
{ $dt->dump;
|
|
die "no HREF in nachor in <DT>"; }
|
|
my ($ahref_file, $ahref_name) = split(/\#/, $ahref);
|
|
if (!defined $ahref_name)
|
|
{ # Reference to entire file
|
|
$ahref_name = ""; }
|
|
|
|
if ($ahref_name eq $l2h_broken_link_name)
|
|
{ if (!exists $file_index_entries_broken{$ahref_file})
|
|
{ $file_index_entries_broken{$ahref_file} = []; }
|
|
push @{$file_index_entries_broken{$ahref_file}}, "$this_indexing_command $acontent";
|
|
next; }
|
|
|
|
if (!exists $file_index_entries{$ahref_file})
|
|
{ $file_index_entries{$ahref_file} = {}; }
|
|
# Don't do this! It appears to make a copy, which is not desired.
|
|
# my %index_entries = %{$file_index_entries{$ahref_file}};
|
|
if (!exists $ {$file_index_entries{$ahref_file}}{$ahref_name})
|
|
{ $ {$file_index_entries{$ahref_file}}{$ahref_name} = []; }
|
|
# { my $oldcontent = $ {$file_index_entries{$ahref_file}}{$ahref_name};
|
|
# if ($acontent eq $oldcontent)
|
|
# { die "Multiple identical index entries?"; }
|
|
# die "Trying to add $acontent, but already have index entry pointing at $ahref_file\#$ahref_name: ${$file_index_entries{$ahref_file}}{$ahref_name}"; }
|
|
|
|
push @{$ {$file_index_entries{$ahref_file}}{$ahref_name}}, "$this_indexing_command $acontent";
|
|
# print STDERR "keys: ", keys %{$file_index_entries{$ahref_file}}, "\n";
|
|
}
|
|
}
|
|
|
|
sub process_index_dt_and_dd ( $$ )
|
|
{ my ($dt, $dd) = check_args(2, @_);
|
|
my $dtcontent;
|
|
{ my @dtcontent = @{$dt->content()};
|
|
if ((scalar(@dtcontent) != 1) || (ref $dtcontent[0]))
|
|
{ $dd->dump;
|
|
$dt->dump;
|
|
die "Expected single string (actual size = " . scalar(@dtcontent) . ") in content of <DT>: @dtcontent"; }
|
|
$dtcontent = $dtcontent[0];
|
|
$dtcontent =~ s/ +$//; }
|
|
my $ddcontent;
|
|
{ my @ddcontent = @{$dd->content()};
|
|
if (scalar(@ddcontent) != 1)
|
|
{ die "Expected single <DD> content, got ", scalar(@ddcontent), " elements:\n", join("\n", @ddcontent), "\n "; }
|
|
$ddcontent = $ddcontent[0]; }
|
|
if ($ddcontent->tag ne "dl")
|
|
{ die "Expected <DL> as content of <DD>, but saw: $ddcontent"; }
|
|
|
|
push @index_prefixes, $index_prefix;
|
|
$index_prefix .= $dtcontent . ", ";
|
|
process_index_dl_compact($ddcontent);
|
|
$index_prefix = pop(@index_prefixes);
|
|
}
|
|
|
|
|
|
###########################################################################
|
|
### Ordinary sections
|
|
###
|
|
|
|
sub process_section_file ( $$$ )
|
|
{ my ($file, $depth, $nodetitle) = check_args(3, @_);
|
|
my $he = file_to_tree(($file =~ /^\//) ? $file : $html_directory . $file);
|
|
|
|
# print STDERR "process_section_file: $file $depth $nodetitle\n";
|
|
|
|
# Equivalently:
|
|
# while ($depth >= scalar(@section_stack)) { pop(@section_stack); }
|
|
@section_stack = @section_stack[0..$depth-1];
|
|
|
|
# Not a great nodename fixup scheme; need a more global view
|
|
if ((defined $contents_fixups{$nodetitle})
|
|
&& (scalar(@section_stack) > 0))
|
|
{ my $up_title = $section_stack[$#section_stack];
|
|
# hack for Python Standard Library
|
|
$up_title =~ s/^(Built-in|Standard) Module //g;
|
|
my ($up_first_word) = split(/ /, $up_title);
|
|
$nodetitle = "$up_first_word $nodetitle";
|
|
}
|
|
|
|
push @section_stack, $nodetitle;
|
|
# print STDERR "new section_stack: ", join(", ", @section_stack), "\n";
|
|
|
|
$he->traverse(\&process_if_child_links, 'ignore text');
|
|
%footnotes = ();
|
|
# $he->dump;
|
|
$he->traverse(\&process_if_footnotes, 'ignore text');
|
|
|
|
# $he->dump;
|
|
|
|
if (exists $file_index_entries{$file})
|
|
{ %this_index_entries = %{$file_index_entries{$file}};
|
|
# print STDERR "this_index_entries:\n ", join("\n ", keys %this_index_entries), "\n";
|
|
}
|
|
else
|
|
{ # print STDERR "Warning: no index entries for file $file\n";
|
|
%this_index_entries = (); }
|
|
|
|
if (exists $file_index_entries_broken{$file})
|
|
{ @this_index_entries_broken = @{$file_index_entries_broken{$file}}; }
|
|
else
|
|
{ # print STDERR "Warning: no index entries for file $file\n";
|
|
@this_index_entries_broken = (); }
|
|
|
|
|
|
if ($he->tag() ne "html")
|
|
{ die "Expected <HTML> at top level"; }
|
|
my @content = @{$he->content()};
|
|
if ((!ref $content[0]) or ($content[0]->tag ne "head"))
|
|
{ $he->dump;
|
|
die "<HEAD> not first element of <HTML>"; }
|
|
if ((!ref $content[1]) or ($content[1]->tag ne "body"))
|
|
{ $he->dump;
|
|
die "<BODY> not second element of <HTML>"; }
|
|
|
|
$content[1]->traverse(\&output_body);
|
|
}
|
|
|
|
# stack of things we're inside that are preventing indexing from occurring now.
|
|
# These are "h1", "h2", "h3", "h4", "h5", "h6", "dt" (and possibly others?)
|
|
my @index_deferrers = ();
|
|
|
|
sub push_or_pop_index_deferrers ( $$ )
|
|
{ my ($tag, $startflag) = check_args(2, @_);
|
|
if ($startflag)
|
|
{ push @index_deferrers, $tag; }
|
|
else
|
|
{ my $old_deferrer = pop @index_deferrers;
|
|
if ($tag ne $old_deferrer)
|
|
{ die "Expected $tag at top of index_deferrers but saw $old_deferrer; remainder = ", join(" ", @index_deferrers); }
|
|
do_deferred_index_entries(); }
|
|
}
|
|
|
|
|
|
sub label_add_index_entries ( $;$ )
|
|
{ my ($label, $he) = check_args_range(1, 2, @_);
|
|
# print ((exists $this_index_entries{$label}) ? "*" : " "), " label_add_index_entries $label\n";
|
|
# $he is the anchor element
|
|
if (exists $this_index_entries{$label})
|
|
{ push @deferred_index_entries, @{$this_index_entries{$label}};
|
|
return; }
|
|
|
|
if ($label eq $l2h_broken_link_name)
|
|
{ # Try to find some text to use in guessing which links should point here
|
|
# I should probably only look at the previous element, or if that is
|
|
# all punctuation, the one before it; collecting all the previous texts
|
|
# is a bit of overkill.
|
|
my @anchor_texts = collect_texts($he);
|
|
my @previous_texts = collect_texts($he->parent, $he);
|
|
# 4 elements is arbitrary; ought to filter out punctuation and small words
|
|
# first, then perhaps keep fewer. Perhaps also filter out formatting so
|
|
# that we can see a larger chunk of text? (Probably not.)
|
|
# Also perhaps should do further chunking into words, in case the
|
|
# index term isn't a chunk of its own (eg, was in <tt>...</tt>.
|
|
my @candidate_texts = (@anchor_texts, (reverse(@previous_texts))[0..min(3,$#previous_texts)]);
|
|
|
|
my $guessed = 0;
|
|
for my $text (@candidate_texts)
|
|
{ # my $orig_text = $text;
|
|
if ($text =~ /^[\"\`\'().?! ]*$/)
|
|
{ next; }
|
|
if (length($text) <= 2)
|
|
{ next; }
|
|
# hack for Python manual; maybe defer until failure first time around?
|
|
$text =~ s/^sys\.//g;
|
|
for my $iterm (@this_index_entries_broken)
|
|
{ # I could test for zero: LaTeX2HTML's failures in the Python
|
|
# documentation are only for items of the form "... (built-in...)"
|
|
if (index($iterm, $text) != -1)
|
|
{ push @deferred_index_entries, $iterm;
|
|
# print STDERR "Guessing index term `$iterm' for text `$orig_text'\n";
|
|
$guessed = 1;
|
|
} } }
|
|
if (!$guessed)
|
|
{ # print STDERR "No guess in `", join("'; `", @this_index_entries_broken), "' for texts:\n `", join("'\n `", @candidate_texts), "'\n";
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
# Need to add calls to this at various places.
|
|
# Perhaps add HTML::Element argument and do the check for appropriateness
|
|
# here (ie, no action if inside <H1>, etc.).
|
|
sub do_deferred_index_entries ()
|
|
{ check_args(0, @_);
|
|
if ((scalar(@deferred_index_entries) > 0)
|
|
&& (scalar(@index_deferrers) == 0))
|
|
{ print TEXI "\n", join("\n", @deferred_index_entries), "\n";
|
|
@deferred_index_entries = (); }
|
|
}
|
|
|
|
my $table_columns; # undefined if not in a table
|
|
my $table_first_column; # boolean
|
|
|
|
sub output_body ( $$$ )
|
|
{ my ($he, $startflag) = (check_args(3, @_))[0,1]; # ignore depth argument
|
|
|
|
if (!ref $he)
|
|
{ my $space_index = index($he, " ");
|
|
if ($space_index != -1)
|
|
{ # Why does
|
|
# print TEXI texi_quote(substr($he, 0, $space_index+1));
|
|
# give: Can't locate object method "TEXI" via package "texi_quote"
|
|
# (Because the definition texi_quote hasn't been seen yet.)
|
|
print TEXI &texi_quote(substr($he, 0, $space_index+1));
|
|
do_deferred_index_entries();
|
|
print TEXI &texi_quote(substr($he, $space_index+1)); }
|
|
else
|
|
{ print TEXI &texi_quote($he); }
|
|
return; }
|
|
|
|
my $tag = $he->tag();
|
|
|
|
# Ordinary text markup first
|
|
if (exists $inline_markup{$tag})
|
|
{ if ($startflag)
|
|
{ print TEXI "\@$inline_markup{$tag}\{"; }
|
|
else
|
|
{ print TEXI "\}"; } }
|
|
elsif ($tag eq "a")
|
|
{ my ($name, $href, @content) = anchor_info($he);
|
|
if (!$href)
|
|
{ # This anchor is only here for indexing/cross referencing purposes.
|
|
if ($startflag)
|
|
{ label_add_index_entries($name, $he); }
|
|
}
|
|
elsif ($href =~ "^(ftp|http|news):")
|
|
{ if ($startflag)
|
|
{ # Should avoid second argument if it's identical to the URL.
|
|
print TEXI "\@uref\{$href, "; }
|
|
else
|
|
{ print TEXI "\}"; }
|
|
}
|
|
elsif ($href =~ /^\#(foot[0-9]+)$/)
|
|
{ # Footnote
|
|
if ($startflag)
|
|
{ # Could double-check name and content, but I'm not
|
|
# currently storing that information.
|
|
print TEXI "\@footnote\{";
|
|
$footnotes{$1}->traverse(\&output_body);
|
|
print TEXI "\}";
|
|
return 0; } }
|
|
else
|
|
{ if ($startflag)
|
|
{ $he->dump;
|
|
warn "Can't deal with internal HREF anchors yet"; }
|
|
}
|
|
}
|
|
elsif ($tag eq "address")
|
|
{ # this is part of the page footer, ignore
|
|
return 0;
|
|
}
|
|
elsif ($tag eq "br")
|
|
{ print TEXI "\@\n"; }
|
|
elsif ($tag eq "body")
|
|
{ }
|
|
elsif ($tag eq "center")
|
|
{ if (has_single_content_string($he)
|
|
&& ($ {$he->content}[0] =~ /^ *$/))
|
|
{ return 0; }
|
|
if ($startflag)
|
|
{ print TEXI "\n\@center\n"; }
|
|
else
|
|
{ print TEXI "\n\@end center\n"; }
|
|
}
|
|
elsif ($tag eq "div")
|
|
{ my $align = $he->attr('align');
|
|
if (defined($align) && ($align eq "center"))
|
|
{ if (has_single_content_string($he)
|
|
&& ($ {$he->content}[0] =~ /^ *$/))
|
|
{ return 0; }
|
|
if ($startflag)
|
|
{ print TEXI "\n\@center\n"; }
|
|
else
|
|
{ print TEXI "\n\@end center\n"; } }
|
|
}
|
|
elsif ($tag eq "dl")
|
|
{ # Recognize "<dl><dd><pre> ... </pre></dl>" paradigm for "@example"
|
|
if (has_single_content_with_tag($he, "dd"))
|
|
{ my $he_dd = $ {$he->content}[0];
|
|
if (has_single_content_with_tag($he_dd, "pre"))
|
|
{ my $he_pre = $ {$he_dd->content}[0];
|
|
print_pre($he_pre);
|
|
return 0; } }
|
|
if ($startflag)
|
|
{ # Could examine the elements, to be cleverer about formatting.
|
|
# (Also to use ftable, vtable...)
|
|
print TEXI "\n\@table \@asis\n"; }
|
|
else
|
|
{ print TEXI "\n\@end table\n"; }
|
|
}
|
|
elsif ($tag eq "dt")
|
|
{ push_or_pop_index_deferrers($tag, $startflag);
|
|
if ($startflag)
|
|
{ print TEXI "\n\@item "; }
|
|
else
|
|
{ } }
|
|
elsif ($tag eq "dd")
|
|
{ if ($startflag)
|
|
{ print TEXI "\n"; }
|
|
else
|
|
{ }
|
|
if (scalar(@index_deferrers) != 0)
|
|
{ $he->dump;
|
|
die "index deferrers: ", join(" ", @index_deferrers); }
|
|
do_deferred_index_entries();
|
|
}
|
|
elsif ($tag =~ /^(font|big|small)$/)
|
|
{ # Do nothing for now.
|
|
}
|
|
elsif ($tag =~ /^h[1-6]$/)
|
|
{ # We don't need this because we never recursively enter the heading content.
|
|
# push_or_pop_index_deferrers($tag, $startflag);
|
|
my $secname = "";
|
|
my @seclabels = ();
|
|
for my $elt (@{$he->content})
|
|
{ if (!ref $elt)
|
|
{ $secname .= $elt; }
|
|
elsif ($elt->tag eq "br")
|
|
{ }
|
|
elsif ($elt->tag eq "a")
|
|
{ my ($name, $href, @acontent) = anchor_info($elt);
|
|
if ($href)
|
|
{ $he->dump;
|
|
$elt->dump;
|
|
die "Nonsimple anchor in <$tag>"; }
|
|
if (!defined $name)
|
|
{ die "No NAME for anchor in $tag"; }
|
|
push @seclabels, $name;
|
|
for my $subelt (@acontent)
|
|
{ $secname .= html_to_texi($subelt); } }
|
|
else
|
|
{ $secname .= html_to_texi($elt); } }
|
|
if ($secname eq "")
|
|
{ die "No section name in <$tag>"; }
|
|
if (scalar(@section_stack) == 1)
|
|
{ if ($section_stack[-1] ne "Top")
|
|
{ die "Not top? $section_stack[-1]"; }
|
|
print TEXI "\@settitle $secname\n";
|
|
print TEXI "\@c %**end of header\n";
|
|
print TEXI "\n";
|
|
print TEXI "\@node Top\n";
|
|
print TEXI "\n"; }
|
|
else
|
|
{ print TEXI "\n\@node $section_stack[-1]\n";
|
|
print TEXI "\@$sectionmarker[scalar(@section_stack)-1] ", texi_remove_punctuation($secname), "\n"; }
|
|
for my $seclabel (@seclabels)
|
|
{ label_add_index_entries($seclabel); }
|
|
# This should only happen once per file.
|
|
label_add_index_entries("");
|
|
if (scalar(@index_deferrers) != 0)
|
|
{ die "index deferrers: ", join(" ", @index_deferrers); }
|
|
do_deferred_index_entries();
|
|
return 0;
|
|
}
|
|
elsif ($tag eq "hr")
|
|
{ }
|
|
elsif ($tag eq "ignore")
|
|
{ # Hack for ignored elements
|
|
return 0;
|
|
}
|
|
elsif ($tag eq "li")
|
|
{ if ($startflag)
|
|
{ print TEXI "\n\n\@item\n";
|
|
do_deferred_index_entries(); } }
|
|
elsif ($tag eq "ol")
|
|
{ if ($startflag)
|
|
{ print TEXI "\n\@enumerate \@bullet\n"; }
|
|
else
|
|
{ print TEXI "\n\@end enumerate\n"; } }
|
|
elsif ($tag eq "p")
|
|
{ if ($startflag)
|
|
{ print TEXI "\n\n"; }
|
|
if (scalar(@index_deferrers) != 0)
|
|
{ die "index deferrers: ", join(" ", @index_deferrers); }
|
|
do_deferred_index_entries(); }
|
|
elsif ($tag eq "pre")
|
|
{ print_pre($he);
|
|
return 0; }
|
|
elsif ($tag eq "table")
|
|
{ # Could also indicate common formatting for first column, or
|
|
# determine relative widths for columns (or determine a prototype row)
|
|
if ($startflag)
|
|
{ if (defined $table_columns)
|
|
{ $he->dump;
|
|
die "Can't deal with table nested inside $table_columns-column table"; }
|
|
$table_columns = table_columns($he);
|
|
if ($table_columns < 2)
|
|
{ $he->dump;
|
|
die "Column with $table_columns columns?"; }
|
|
elsif ($table_columns == 2)
|
|
{ print TEXI "\n\@table \@asis\n"; }
|
|
else
|
|
{ print TEXI "\n\@multitable \@columnfractions";
|
|
for (my $i=0; $i<$table_columns; $i++)
|
|
{ print TEXI " ", 1.0/$table_columns; }
|
|
print TEXI "\n"; } }
|
|
else
|
|
{ if ($table_columns == 2)
|
|
{ print TEXI "\n\@end table\n"; }
|
|
else
|
|
{ print TEXI "\n\@end multitable\n"; }
|
|
undef $table_columns; } }
|
|
elsif (($tag eq "td") || ($tag eq "th"))
|
|
{ if ($startflag)
|
|
{ if ($table_first_column)
|
|
{ print TEXI "\n\@item ";
|
|
$table_first_column = 0; }
|
|
elsif ($table_columns > 2)
|
|
{ print TEXI "\n\@tab "; } }
|
|
else
|
|
{ print TEXI "\n"; } }
|
|
elsif ($tag eq "tr")
|
|
{ if ($startflag)
|
|
{ $table_first_column = 1; } }
|
|
elsif ($tag eq "ul")
|
|
{ if ($startflag)
|
|
{ print TEXI "\n\@itemize \@bullet\n"; }
|
|
else
|
|
{ print TEXI "\n\@end itemize\n"; } }
|
|
else
|
|
{ print STDERR "\nBailing out\n";
|
|
$he->dump;
|
|
return 0; }
|
|
|
|
return 1;
|
|
}
|
|
|
|
sub print_pre ( $ )
|
|
{ my ($he_pre) = check_args(1, @_);
|
|
if (!has_single_content_string($he_pre))
|
|
{ die "Multiple or non-string content for <PRE>: ", @{$he_pre->content}; }
|
|
my $pre_content = $ {$he_pre->content}[0];
|
|
print TEXI "\n\@example";
|
|
print TEXI &texi_quote($pre_content);
|
|
print TEXI "\@end example\n";
|
|
}
|
|
|
|
sub table_columns ( $ )
|
|
{ my ($table) = check_args(1, @_);
|
|
my $result = 0;
|
|
for my $row (@{$table->content})
|
|
{ if ($row->tag ne "tr")
|
|
{ $table->dump;
|
|
$row->dump;
|
|
die "Expected <TR> as table row."; }
|
|
$result = max($result, scalar(@{$row->content})); }
|
|
return $result;
|
|
}
|
|
|
|
|
|
###########################################################################
|
|
### Utilities
|
|
###
|
|
|
|
sub min ( $$ )
|
|
{ my ($x, $y) = check_args(2, @_);
|
|
return ($x < $y) ? $x : $y;
|
|
}
|
|
|
|
sub max ( $$ )
|
|
{ my ($x, $y) = check_args(2, @_);
|
|
return ($x > $y) ? $x : $y;
|
|
}
|
|
|
|
sub file_to_tree ( $ )
|
|
{ my ($file) = check_args(1, @_);
|
|
|
|
my $tree = new HTML::TreeBuilder;
|
|
$tree->ignore_unknown(1);
|
|
# $tree->warn(1);
|
|
$tree->parse_file($file);
|
|
cleanup_parse_tree($tree);
|
|
return $tree
|
|
}
|
|
|
|
|
|
sub has_single_content ( $ )
|
|
{ my ($he) = check_args(1, @_);
|
|
if (!ref $he)
|
|
{ # return 0;
|
|
die "Non-reference argument: $he"; }
|
|
my $ref_content = $he->content;
|
|
if (!defined $ref_content)
|
|
{ return 0; }
|
|
my @content = @{$ref_content};
|
|
if (scalar(@content) != 1)
|
|
{ return 0; }
|
|
return 1;
|
|
}
|
|
|
|
|
|
# Return true if the content of the element contains only one element itself,
|
|
# and that inner element has the specified tag.
|
|
sub has_single_content_with_tag ( $$ )
|
|
{ my ($he, $tag) = check_args(2, @_);
|
|
if (!has_single_content($he))
|
|
{ return 0; }
|
|
my $content = $ {$he->content}[0];
|
|
if (!ref $content)
|
|
{ return 0; }
|
|
my $content_tag = $content->tag;
|
|
if (!defined $content_tag)
|
|
{ return 0; }
|
|
return $content_tag eq $tag;
|
|
}
|
|
|
|
sub has_single_content_string ( $ )
|
|
{ my ($he) = check_args(1, @_);
|
|
if (!has_single_content($he))
|
|
{ return 0; }
|
|
my $content = $ {$he->content}[0];
|
|
if (ref $content)
|
|
{ return 0; }
|
|
return 1;
|
|
}
|
|
|
|
|
|
# Return name, href, content. First two may be undefined; third is an array.
|
|
# I don't see how to determine if there are more attributes.
|
|
sub anchor_info ( $ )
|
|
{ my ($he) = check_args(1, @_);
|
|
if ($he->tag ne "a")
|
|
{ $he->dump;
|
|
die "passed non-anchor to anchor_info"; }
|
|
my $name = $he->attr('name');
|
|
my $href = $he->attr('href');
|
|
my @content = ();
|
|
{ my $ref_content = $he->content;
|
|
if (defined $ref_content)
|
|
{ @content = @{$ref_content}; } }
|
|
return ($name, $href, @content);
|
|
}
|
|
|
|
|
|
sub texi_quote ( $ )
|
|
{ my ($text) = check_args(1, @_);
|
|
$text =~ s/([\@\{\}])/\@$1/g;
|
|
$text =~ s/ -- / --- /g;
|
|
return $text;
|
|
}
|
|
|
|
# Eliminate bad punctuation (that confuses Makeinfo or Info) for section titles.
|
|
sub texi_remove_punctuation ( $ )
|
|
{ my ($text) = check_args(1, @_);
|
|
|
|
$text =~ s/^ +//g;
|
|
$text =~ s/[ :]+$//g;
|
|
$text =~ s/^[1-9][0-9.]* +//g;
|
|
$text =~ s/,//g;
|
|
# Both embedded colons and " -- " confuse makeinfo. (Perhaps " -- "
|
|
# gets converted into " - ", just as "---" would be converted into " -- ",
|
|
# so the names end up differing.)
|
|
# $text =~ s/:/ -- /g;
|
|
$text =~ s/://g;
|
|
return $text;
|
|
}
|
|
|
|
|
|
## Do not use this inside `traverse': it throws off the traversal. Use
|
|
## html_replace_by_ignore or html_replace_by_meta instead.
|
|
# Returns 1 if success, 0 if failure.
|
|
sub html_remove ( $;$ )
|
|
{ my ($he, $parent) = check_args_range(1, 2, @_);
|
|
if (!defined $parent)
|
|
{ $parent = $he->parent; }
|
|
my $ref_pcontent = $parent->content;
|
|
my @pcontent = @{$ref_pcontent};
|
|
for (my $i=0; $i<scalar(@pcontent); $i++)
|
|
{ if ($pcontent[$i] eq $he)
|
|
{ splice @{$ref_pcontent}, $i, 1;
|
|
$he->parent(undef);
|
|
return 1; } }
|
|
die "Didn't find $he in $parent";
|
|
}
|
|
|
|
|
|
sub html_replace ( $$;$ )
|
|
{ my ($orig, $new, $parent) = check_args_range(2, 3, @_);
|
|
if (!defined $parent)
|
|
{ $parent = $orig->parent; }
|
|
my $ref_pcontent = $parent->content;
|
|
my @pcontent = @{$ref_pcontent};
|
|
for (my $i=0; $i<scalar(@pcontent); $i++)
|
|
{ if ($pcontent[$i] eq $orig)
|
|
{ $ {$ref_pcontent}[$i] = $new;
|
|
$new->parent($parent);
|
|
$orig->parent(undef);
|
|
return 1; } }
|
|
die "Didn't find $orig in $parent";
|
|
}
|
|
|
|
sub html_replace_by_meta ( $;$ )
|
|
{ my ($orig, $parent) = check_args_range(1, 2, @_);
|
|
my $meta = new HTML::Element "meta";
|
|
if (!defined $parent)
|
|
{ $parent = $orig->parent; }
|
|
return html_replace($orig, $meta, $parent);
|
|
}
|
|
|
|
sub html_replace_by_ignore ( $;$ )
|
|
{ my ($orig, $parent) = check_args_range(1, 2, @_);
|
|
my $ignore = new HTML::Element "ignore";
|
|
if (!defined $parent)
|
|
{ $parent = $orig->parent; }
|
|
return html_replace($orig, $ignore, $parent);
|
|
}
|
|
|
|
|
|
|
|
###
|
|
### Collect text elements
|
|
###
|
|
|
|
my @collected_texts;
|
|
my $collect_texts_stoppoint;
|
|
my $done_collecting;
|
|
|
|
sub collect_texts ( $;$ )
|
|
{ my ($root, $stop) = check_args_range(1, 2, @_);
|
|
# print STDERR "collect_texts: $root $stop\n";
|
|
$collect_texts_stoppoint = $stop;
|
|
$done_collecting = 0;
|
|
@collected_texts = ();
|
|
$root->traverse(\&collect_if_text); # process texts
|
|
# print STDERR "collect_texts => ", join(";;;", @collected_texts), "\n";
|
|
return @collected_texts;
|
|
}
|
|
|
|
sub collect_if_text ( $$$ )
|
|
{ my $he = (check_args(3, @_))[0]; # ignore depth and startflag arguments
|
|
if ($done_collecting)
|
|
{ return 0; }
|
|
if (!defined $he)
|
|
{ return 0; }
|
|
if (!ref $he)
|
|
{ push @collected_texts, $he;
|
|
return 0; }
|
|
if ((defined $collect_texts_stoppoint) && ($he eq $collect_texts_stoppoint))
|
|
{ $done_collecting = 1;
|
|
return 0; }
|
|
return 1;
|
|
}
|
|
|
|
|
|
###########################################################################
|
|
### Clean up parse tree
|
|
###
|
|
|
|
sub cleanup_parse_tree ( $ )
|
|
{ my ($he) = check_args(1, @_);
|
|
$he->traverse(\&delete_if_navigation, 'ignore text');
|
|
$he->traverse(\&delete_extra_spaces, 'ignore text');
|
|
$he->traverse(\&merge_dl, 'ignore text');
|
|
return $he;
|
|
}
|
|
|
|
|
|
## Simpler version that deletes contents but not the element itself.
|
|
# sub delete_if_navigation ( $$$ )
|
|
# { my $he = (check_args(3, @_))[0]; # ignore startflag and depth
|
|
# if (($he->tag() eq "div") && ($he->attr('class') eq 'navigation'))
|
|
# { $he->delete();
|
|
# return 0; }
|
|
# else
|
|
# { return 1; }
|
|
# }
|
|
|
|
sub delete_if_navigation ( $$$ )
|
|
{ my ($he, $startflag) = (check_args(3, @_))[0,1]; # ignore depth argument
|
|
if (!$startflag)
|
|
{ return; }
|
|
|
|
if (($he->tag() eq "div") && (defined $he->attr('class')) && ($he->attr('class') eq 'navigation'))
|
|
{ my $ref_pcontent = $he->parent()->content();
|
|
# Don't try to modify @pcontent, which appears to be a COPY.
|
|
# my @pcontent = @{$ref_pcontent};
|
|
for (my $i = 0; $i<scalar(@{$ref_pcontent}); $i++)
|
|
{ if (${$ref_pcontent}[$i] eq $he)
|
|
{ splice(@{$ref_pcontent}, $i, 1);
|
|
last; } }
|
|
$he->delete();
|
|
return 0; }
|
|
else
|
|
{ return 1; }
|
|
}
|
|
|
|
sub delete_extra_spaces ( $$$ )
|
|
{ my ($he, $startflag) = (check_args(3, @_))[0,1]; # ignore depth argument
|
|
if (!$startflag)
|
|
{ return; }
|
|
|
|
my $tag = $he->tag;
|
|
if ($tag =~ /^(head|html|table|tr|ul)$/)
|
|
{ delete_child_spaces($he); }
|
|
delete_trailing_spaces($he);
|
|
return 1;
|
|
}
|
|
|
|
|
|
sub delete_child_spaces ( $ )
|
|
{ my ($he) = check_args(1, @_);
|
|
my $ref_content = $he->content();
|
|
for (my $i = 0; $i<scalar(@{$ref_content}); $i++)
|
|
{ if ($ {$ref_content}[$i] =~ /^ *$/)
|
|
{ splice(@{$ref_content}, $i, 1);
|
|
$i--; } }
|
|
}
|
|
|
|
sub delete_trailing_spaces ( $ )
|
|
{ my ($he) = check_args(1, @_);
|
|
my $ref_content = $he->content();
|
|
if (! defined $ref_content)
|
|
{ return; }
|
|
# Could also check for previous element = /^h[1-6]$/.
|
|
for (my $i = 0; $i<scalar(@{$ref_content})-1; $i++)
|
|
{ if ($ {$ref_content}[$i] =~ /^ *$/)
|
|
{ my $next_elt = $ {$ref_content}[$i+1];
|
|
if ((ref $next_elt) && ($next_elt->tag =~ /^(br|dd|dl|dt|hr|p|ul)$/))
|
|
{ splice(@{$ref_content}, $i, 1);
|
|
$i--; } } }
|
|
if ($he->tag =~ /^(dd|dt|^h[1-6]|li|p)$/)
|
|
{ my $last_elt = $ {$ref_content}[$#{$ref_content}];
|
|
if ((defined $last_elt) && ($last_elt =~ /^ *$/))
|
|
{ pop @{$ref_content}; } }
|
|
}
|
|
|
|
|
|
# If we find a paragraph that looks like
|
|
# <P>
|
|
# <HR>
|
|
# <UL>
|
|
# then accumulate its links into a contents_list and delete the paragraph.
|
|
sub process_if_child_links ( $$$ )
|
|
{ my ($he, $startflag) = (check_args(3, @_))[0,1]; # ignore depth argument
|
|
if (!$startflag)
|
|
{ return; }
|
|
|
|
if ($he->tag() eq "p")
|
|
{ my $ref_content = $he->content();
|
|
if (defined $ref_content)
|
|
{ my @content = @{$ref_content};
|
|
if ((scalar(@content) == 2)
|
|
&& (ref $content[0]) && $content[0]->tag() eq "hr"
|
|
&& (ref $content[1]) && $content[1]->tag() eq "ul")
|
|
{ process_child_links($he);
|
|
$he->delete();
|
|
return 0; } } }
|
|
return 1;
|
|
}
|
|
|
|
|
|
# If we find
|
|
# <H4>
|
|
# "Footnotes"
|
|
# <DL>
|
|
# <DT>
|
|
# <A NAME="foot560">
|
|
# "...borrow"
|
|
# <A HREF="refcountsInPython.html#tex2html2" NAME="foot560">
|
|
# "1.2"
|
|
# <DD>
|
|
# "The metaphor of ``borrowing'' a reference is not completely correct: the owner still has a copy of the reference. "
|
|
# ...
|
|
# then record the footnote information and delete the section and list.
|
|
|
|
my $process_if_footnotes_expect_dl_next = 0;
|
|
|
|
sub process_if_footnotes ( $$$ )
|
|
{ my ($he, $startflag) = (check_args(3, @_))[0,1]; # ignore depth argument
|
|
if (!$startflag)
|
|
{ return; }
|
|
|
|
if (($he->tag() eq "h4")
|
|
&& has_single_content_string($he)
|
|
&& ($ {$he->content}[0] eq "Footnotes"))
|
|
{ html_replace_by_ignore($he);
|
|
$process_if_footnotes_expect_dl_next = 1;
|
|
return 0; }
|
|
|
|
if ($process_if_footnotes_expect_dl_next && ($he->tag() eq "dl"))
|
|
{ my $ref_content = $he->content();
|
|
if (defined $ref_content)
|
|
{ $process_if_footnotes_expect_dl_next = 0;
|
|
my @content = @{$ref_content};
|
|
for (my $i=0; $i<$#content; $i+=2)
|
|
{ my $he_dt = $content[$i];
|
|
my $he_dd = $content[$i+1];
|
|
if (($he_dt->tag ne "dt") || ($he_dd->tag ne "dd"))
|
|
{ $he->dump;
|
|
die "expected <DT> and <DD> at positions $i and ", $i+1; }
|
|
my @dt_content = @{$he_dt->content()};
|
|
if ((scalar(@dt_content) != 2)
|
|
|| ($dt_content[0]->tag ne "a")
|
|
|| ($dt_content[1]->tag ne "a"))
|
|
{ $he_dt->dump;
|
|
die "Expected 2 anchors as content of <DT>"; }
|
|
my ($dt1_name, $dt1_href, $dt1_content) = anchor_info($dt_content[0]);
|
|
my ($dt2_name, $dt2_href, $dt2_content) = anchor_info($dt_content[0]);
|
|
# unused: $dt1_href, $dt1_content, $dt2_href, $dt2_content
|
|
if ($dt1_name ne $dt2_name)
|
|
{ $he_dt->dump;
|
|
die "Expected identical names for anchors"; }
|
|
html_replace_by_ignore($he_dd);
|
|
$he_dd->tag("div"); # has no effect
|
|
$footnotes{$dt1_name} = $he_dd; }
|
|
html_replace_by_ignore($he);
|
|
return 0; } }
|
|
|
|
if ($process_if_footnotes_expect_dl_next)
|
|
{ $he->dump;
|
|
die "Expected <DL> for footnotes next"; }
|
|
|
|
return 1;
|
|
}
|
|
|
|
|
|
|
|
## Merge two adjacent paragraphs containing <DL> items, such as:
|
|
# <P>
|
|
# <DL>
|
|
# <DT>
|
|
# ...
|
|
# <DD>
|
|
# ...
|
|
# <P>
|
|
# <DL>
|
|
# <DT>
|
|
# ...
|
|
# <DD>
|
|
# ...
|
|
|
|
sub merge_dl ( $$$ )
|
|
{ my ($he, $startflag) = (check_args(3, @_))[0,1]; # ignore depth argument
|
|
if (!$startflag)
|
|
{ return; }
|
|
|
|
my $ref_content = $he->content;
|
|
if (!defined $ref_content)
|
|
{ return; }
|
|
my $i = 0;
|
|
while ($i < scalar(@{$ref_content})-1)
|
|
{ my $p1 = $ {$ref_content}[$i];
|
|
if ((ref $p1) && ($p1->tag eq "p")
|
|
&& has_single_content_with_tag($p1, "dl"))
|
|
{ my $dl1 = $ {$p1->content}[0];
|
|
# In this loop, rhs, not lhs, of < comparison changes,
|
|
# because we are removing elements from the content of $he.
|
|
while ($i < scalar(@{$ref_content})-1)
|
|
{ my $p2 = $ {$ref_content}[$i+1];
|
|
if (!((ref $p2) && ($p2->tag eq "p")
|
|
&& has_single_content_with_tag($p2, "dl")))
|
|
{ last; }
|
|
# Merge these two elements.
|
|
splice(@{$ref_content}, $i+1, 1); # remove $p2
|
|
my $dl2 = $ {$p2->content}[0];
|
|
$dl1->push_content(@{$dl2->content}); # put $dl2's content in $dl1
|
|
}
|
|
# extra increment because next element isn't a candidate for $p1
|
|
$i++; }
|
|
$i++; }
|
|
return 1;
|
|
}
|
|
|
|
|
|
|
|
###########################################################################
|
|
### Testing
|
|
###
|
|
|
|
sub test ( $$ )
|
|
{ my ($action, $file) = check_args(2, @_);
|
|
|
|
# General testing
|
|
if (($action eq "view") || ($action eq ""))
|
|
{ # # $file = "/homes/gws/mernst/www/links.html";
|
|
# # $file = "/homes/gws/mernst/www/index.html";
|
|
# # $file = "/homes/fish/mernst/java/gud/doc/manual.html";
|
|
# # $file = "/projects/cecil/cecil/doc/manuals/stdlib-man/stdlib/stdlib.html";
|
|
# # $file = "/homes/fish/mernst/tmp/python-doc/html/index.html";
|
|
# $file = "/homes/fish/mernst/tmp/python-doc/html/api/complexObjects.html";
|
|
my $tree = file_to_tree($file);
|
|
|
|
## Testing
|
|
# print STDERR $tree->as_HTML;
|
|
$tree->dump();
|
|
|
|
# print STDERR $tree->tag(), "\n";
|
|
# print STDERR @{$tree->content()}, "\n";
|
|
#
|
|
# for (@{ $tree->extract_links(qw(a img)) }) {
|
|
# my ($link, $linkelem) = @$_;
|
|
# print STDERR "$link ", $linkelem->as_HTML;
|
|
# }
|
|
#
|
|
# print STDERR @{$tree->extract_links()}, "\n";
|
|
|
|
# my @top_level_elts = @{$tree->content()};
|
|
|
|
# if scalar(@{$tree->content()})
|
|
return;
|
|
}
|
|
|
|
elsif ($action eq "raw")
|
|
{ my $tree = new HTML::TreeBuilder;
|
|
$tree->ignore_unknown(1);
|
|
# $tree->warn(1);
|
|
$tree->parse_file($file);
|
|
|
|
$tree->dump();
|
|
|
|
# cleanup_parse_tree($tree);
|
|
# $tree->dump();
|
|
return;
|
|
}
|
|
|
|
# Test dealing with a section.
|
|
elsif ($action eq "section")
|
|
{ # my $file;
|
|
# $file = "/homes/fish/mernst/tmp/python-doc/html/api/intro.html";
|
|
# $file = "/homes/fish/mernst/tmp/python-doc/html/api/includes.html";
|
|
# $file = "/homes/fish/mernst/tmp/python-doc/html/api/complexObjects.html";
|
|
process_section_file($file, 0, "Title");
|
|
}
|
|
|
|
# Test dealing with many sections
|
|
elsif (0)
|
|
{ my @files = ("/homes/fish/mernst/tmp/python-doc/html/api/about.html",
|
|
"/homes/fish/mernst/tmp/python-doc/html/api/abstract.html",
|
|
"/homes/fish/mernst/tmp/python-doc/html/api/api.html",
|
|
"/homes/fish/mernst/tmp/python-doc/html/api/cObjects.html",
|
|
"/homes/fish/mernst/tmp/python-doc/html/api/complexObjects.html",
|
|
"/homes/fish/mernst/tmp/python-doc/html/api/concrete.html",
|
|
# "/homes/fish/mernst/tmp/python-doc/html/api/contents.html",
|
|
"/homes/fish/mernst/tmp/python-doc/html/api/countingRefs.html",
|
|
"/homes/fish/mernst/tmp/python-doc/html/api/debugging.html",
|
|
"/homes/fish/mernst/tmp/python-doc/html/api/dictObjects.html",
|
|
"/homes/fish/mernst/tmp/python-doc/html/api/embedding.html",
|
|
"/homes/fish/mernst/tmp/python-doc/html/api/exceptionHandling.html",
|
|
"/homes/fish/mernst/tmp/python-doc/html/api/exceptions.html",
|
|
"/homes/fish/mernst/tmp/python-doc/html/api/fileObjects.html",
|
|
"/homes/fish/mernst/tmp/python-doc/html/api/floatObjects.html",
|
|
"/homes/fish/mernst/tmp/python-doc/html/api/front.html",
|
|
"/homes/fish/mernst/tmp/python-doc/html/api/fundamental.html",
|
|
# "/homes/fish/mernst/tmp/python-doc/html/api/genindex.html",
|
|
"/homes/fish/mernst/tmp/python-doc/html/api/importing.html",
|
|
"/homes/fish/mernst/tmp/python-doc/html/api/includes.html",
|
|
"/homes/fish/mernst/tmp/python-doc/html/api/index.html",
|
|
"/homes/fish/mernst/tmp/python-doc/html/api/initialization.html",
|
|
"/homes/fish/mernst/tmp/python-doc/html/api/intObjects.html",
|
|
"/homes/fish/mernst/tmp/python-doc/html/api/intro.html",
|
|
"/homes/fish/mernst/tmp/python-doc/html/api/listObjects.html",
|
|
"/homes/fish/mernst/tmp/python-doc/html/api/longObjects.html",
|
|
"/homes/fish/mernst/tmp/python-doc/html/api/mapObjects.html",
|
|
"/homes/fish/mernst/tmp/python-doc/html/api/mapping.html",
|
|
"/homes/fish/mernst/tmp/python-doc/html/api/newTypes.html",
|
|
"/homes/fish/mernst/tmp/python-doc/html/api/node24.html",
|
|
"/homes/fish/mernst/tmp/python-doc/html/api/noneObject.html",
|
|
"/homes/fish/mernst/tmp/python-doc/html/api/number.html",
|
|
"/homes/fish/mernst/tmp/python-doc/html/api/numericObjects.html",
|
|
"/homes/fish/mernst/tmp/python-doc/html/api/object.html",
|
|
"/homes/fish/mernst/tmp/python-doc/html/api/objects.html",
|
|
"/homes/fish/mernst/tmp/python-doc/html/api/os.html",
|
|
"/homes/fish/mernst/tmp/python-doc/html/api/otherObjects.html",
|
|
"/homes/fish/mernst/tmp/python-doc/html/api/processControl.html",
|
|
"/homes/fish/mernst/tmp/python-doc/html/api/refcountDetails.html",
|
|
"/homes/fish/mernst/tmp/python-doc/html/api/refcounts.html",
|
|
"/homes/fish/mernst/tmp/python-doc/html/api/sequence.html",
|
|
"/homes/fish/mernst/tmp/python-doc/html/api/sequenceObjects.html",
|
|
"/homes/fish/mernst/tmp/python-doc/html/api/standardExceptions.html",
|
|
"/homes/fish/mernst/tmp/python-doc/html/api/stringObjects.html",
|
|
"/homes/fish/mernst/tmp/python-doc/html/api/threads.html",
|
|
"/homes/fish/mernst/tmp/python-doc/html/api/tupleObjects.html",
|
|
"/homes/fish/mernst/tmp/python-doc/html/api/typeObjects.html",
|
|
"/homes/fish/mernst/tmp/python-doc/html/api/types.html",
|
|
"/homes/fish/mernst/tmp/python-doc/html/api/utilities.html",
|
|
"/homes/fish/mernst/tmp/python-doc/html/api/veryhigh.html");
|
|
for my $file (@files)
|
|
{ print STDERR "\n", "=" x 75, "\n", "$file:\n";
|
|
process_section_file($file, 0, "Title");
|
|
}
|
|
}
|
|
|
|
# Test dealing with index.
|
|
elsif ($action eq "index")
|
|
{ # my $file;
|
|
# $file = "/homes/fish/mernst/tmp/python-doc/html/api/genindex.html";
|
|
|
|
process_index_file($file, "\@cindex");
|
|
print_index_info();
|
|
}
|
|
|
|
else
|
|
{ die "Unrecognized action `$action'"; }
|
|
}
|
|
|
|
|
|
###########################################################################
|
|
### Main loop
|
|
###
|
|
|
|
sub process_contents_file ( $ )
|
|
{ my ($file) = check_args(1, @_);
|
|
|
|
# could also use File::Basename
|
|
my $info_file = $file;
|
|
$info_file =~ s/(\/?index)?\.html$//;
|
|
if ($info_file eq "")
|
|
{ chomp($info_file = `pwd`); }
|
|
$info_file =~ s/^.*\///; # not the most efficient way to remove dirs
|
|
|
|
$html_directory = $file;
|
|
$html_directory =~ s/(\/|^)[^\/]+$/$1/;
|
|
|
|
my $texi_file = "$info_file.texi";
|
|
open(TEXI, ">$texi_file");
|
|
|
|
print TEXI "\\input texinfo \@c -*-texinfo-*-\n";
|
|
print TEXI "\@c %**start of header\n";
|
|
print TEXI "\@setfilename $info_file\n";
|
|
|
|
# 2. Summary Description and Copyright
|
|
# The "Summary Description and Copyright" segment describes the
|
|
# document and contains the copyright notice and copying permissions
|
|
# for the Info file. The segment must be enclosed between `@ifinfo'
|
|
# and `@end ifinfo' commands so that the formatters place it only in
|
|
# the Info file.
|
|
#
|
|
# The summary description and copyright segment does not appear in the
|
|
# printed document.
|
|
#
|
|
# @ifinfo
|
|
# This is a short example of a complete Texinfo file.
|
|
#
|
|
# Copyright @copyright{} 1990 Free Software Foundation, Inc.
|
|
# @end ifinfo
|
|
|
|
|
|
# 3. Title and Copyright
|
|
# The "Title and Copyright" segment contains the title and copyright
|
|
# pages and copying permissions for the printed manual. The segment
|
|
# must be enclosed between `@titlepage' and `@end titlepage'
|
|
# commands. The title and copyright page appear only in the printed
|
|
# manual.
|
|
#
|
|
# The titlepage segment does not appear in the Info file.
|
|
#
|
|
# @titlepage
|
|
# @sp 10
|
|
# @comment The title is printed in a large font.
|
|
# @center @titlefont{Sample Title}
|
|
#
|
|
# @c The following two commands start the copyright page.
|
|
# @page
|
|
# @vskip 0pt plus 1filll
|
|
# Copyright @copyright{} 1990 Free Software Foundation, Inc.
|
|
# @end titlepage
|
|
|
|
|
|
# 4. `Top' Node and Master Menu
|
|
# The "Master Menu" contains a complete menu of all the nodes in the
|
|
# whole Info file. It appears only in the Info file, in the `Top'
|
|
# node.
|
|
#
|
|
# The `Top' node contains the master menu for the Info file. Since a
|
|
# printed manual uses a table of contents rather than a menu, the master
|
|
# menu appears only in the Info file.
|
|
#
|
|
# @node Top, First Chapter, , (dir)
|
|
# @comment node-name, next, previous, up
|
|
#
|
|
# @menu
|
|
# * First Chapter:: The first chapter is the
|
|
# only chapter in this sample.
|
|
# * Concept Index:: This index has two entries.
|
|
# @end menu
|
|
|
|
|
|
|
|
$current_ref_tdf = [ "Top", 0, $ARGV[0] ];
|
|
process_section_file($file, 0, "Top");
|
|
while (scalar(@contents_list))
|
|
{ $current_ref_tdf = shift @contents_list;
|
|
process_section_file($ {$current_ref_tdf}[2], $ {$current_ref_tdf}[1], $ {$current_ref_tdf}[0]);
|
|
}
|
|
|
|
print TEXI "\n";
|
|
for my $indextitle (@index_titles)
|
|
{ print TEXI "\@node $indextitle\n";
|
|
print TEXI "\@unnumbered $indextitle\n";
|
|
print TEXI "\@printindex $ {$index_info{$indextitle}}[1]\n";
|
|
print TEXI "\n"; }
|
|
|
|
print TEXI "\@contents\n";
|
|
print TEXI "\@bye\n";
|
|
close(TEXI);
|
|
}
|
|
|
|
# This needs to be last so global variable initializations are reached.
|
|
|
|
if (scalar(@ARGV) == 0)
|
|
{ die "No arguments supplied to html2texi.pl"; }
|
|
|
|
if ($ARGV[0] eq "-test")
|
|
{ my @test_args = @ARGV[1..$#ARGV];
|
|
if (scalar(@test_args) == 0)
|
|
{ test("", "index.html"); }
|
|
elsif (scalar(@test_args) == 1)
|
|
{ test("", $test_args[0]); }
|
|
elsif (scalar(@test_args) == 2)
|
|
{ test($test_args[0], $test_args[1]); }
|
|
else
|
|
{ die "Too many test arguments passed to html2texi: ", join(" ", @ARGV); }
|
|
exit();
|
|
}
|
|
|
|
if (scalar(@ARGV) != 1)
|
|
{ die "Pass one argument, the main/contents page"; }
|
|
|
|
process_contents_file($ARGV[0]);
|