Packages and Style-Files

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Similar to the document-class mechanism described in the previous section, L^ATEX2HTML provides a mechanism whereby the code to translate specific packages and style-files is automatically loaded, if such code is available. For example, when use of a style such as german.sty is detected in a L^ATEX source document, either by

• a \usepackage command of L^ATEX2_e;
• an option to the \documentstyle command of L^ATEX2.09;
• an explicit \input or \include command;

the translator looks for a corresponding .perl file having the same file-name prefix; e.g. the file $LATEX2HTMLDIR/styles/german.perl. If such a .perl file is found, then its code will be incorporated with the main script, to be used as required.

This mechanism helps to keep the core script smaller, as well as making it easier for others to contribute and share solutions on how to translate specific style-files.
^96.1
The current distribution includes the files to support the styles listed in the table below. These provide good examples of how you can create further extensions to L^ATEX2HTML.
^96.1

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Table 6: Supported L^ATEX2HTML style-files.

.perl file	Description
alltt335	Supports the LATEX2e's alltt package.
amsfonts336	provides recognition of the special AMS font symbols.
amsmath337	same as amstex.perl.
amssymb338	same as amsfonts.perl.
amstex339	Supports much of the AMS-LATEX package (not yet complete).
babel340	Interface to german.perl via the babel package.
changebar341	Provides rudimentary change-bar support.
chemsym342	defines the standard atomic symbols.
color343	Causes colored text to be processed as ordinary text by LATEX2HTML.
colordvi344	supports the Crayola colors.
enumerate345	supports structured labels for enumerate environments.
epsbox346	Processes embedded figures not enclosed in a figure environment.
epsfig347	Processes embedded figures not enclosed in a figure environment.
floatfig348	Processes floating figures.
floatflt349	Processes floating figures and tables.
foils350	Supports FoilTeX system.
frames351	Provides separate frames for navigation and footnotes.
francais352	Special support for the French language, same as french.perl.
french353	Special support for the French language.
german354	Special support for the German language.
germanb355	Special support for the German language, same as german.perl.
graphics356	Supports commands in the graphics package.
graphicx357	Supports the alternate syntax of graphics commands.
harvard358	Supports the harvard style of citation (same as fnnharvard.perl).
heqn359	Alters the way displayed equations are processed.
hthtml360	gives an alternative syntax for specifying hyperlinks, etc.
htmllist361	Provides support for fancy lists.
justify362	supports paragraph alignment--no longer needed.
latexsym363	supports the LATEX symbol font.
lgrind364	macros for nice layout of computer program code.
longtable365 366	supports use of long tables, as a single table.
makeidx367	provides more sophisticated indexing.
multicol368	suppresses requests for multi-columns.
natbib369	Supports many different styles for citations and bibliographies.
nharvard370	Supports harvard-style citations, using natbib.
seminar371	for creation of overhead-presentation slides.
supertabular372	supports use super-tables, as an ordinary table.
texdefs373	Supports some raw TEX commands.
verbatim374	Supports verbatim input of files.
verbatimfiles375	Supports verbatim input of files, also with line-numbering.
wrapfig376	Supports wrapped figures.
xspace377	Supports use of the xspace package and \xspace command.
xy378 379	Supports use of the XY-pic graphics package.

The problem however, is that writing such extensions requires an understanding of Perl programming and of the way the processing in L^ATEX2HTML is organised. Interfaces that are more ``user-friendly'' are being investigated. Some of the techniques currently used are explained in a later section.