mirror of
https://gerrit.wikimedia.org/r/mediawiki/extensions/Math
synced 2024-09-23 18:29:39 +00:00
dbe0a339de
mathematical function names when translating to HTML; adds support for the sen, the Spanish name for sin; and corrects a bug that eliminates spacing around \operatorname{...} in the resulting png. More specifically, texvc now dectect whether or not a standard function such as is followed by a delimitier such as (, {, [ etc. and adds a space or not as appropriate. This issue The code has been reorganized to include a list of standard LaTeX commands whose spacing rules are the same, and treates them all on an equal footing. It similarly treats functions defined for mediawiki in the same way it treats standard latex functions. One addition function is added, \sen, and others can be added easily if necessary. Finally LaTeX generated by texvc contained to many braces which altered the spacing created by the command \operatorname, this has now been corrected. These last two changes address the issues raised in bug 18912 and the chaning in translation to HTML address most, but not all, of the issues raised in bug 6722 . |
||
---|---|---|
.. | ||
.htaccess | ||
html.ml | ||
html.mli | ||
lexer.mll | ||
Makefile | ||
mathml.ml | ||
mathml.mli | ||
parser.mly | ||
README | ||
render.ml | ||
render_info.mli | ||
tex.mli | ||
texutil.ml | ||
texutil.mli | ||
texvc.ml | ||
texvc_cgi.ml | ||
texvc_test.ml | ||
texvc_tex.ml | ||
TODO | ||
util.ml |
== About texvc == texvc takes LaTeX-compatible equations and produces formatted output in HTML, MathML, and (via LaTeX/dvipng) rasterized PNG images. Input data is parsed and scrutinized for safety, and the output includes an estimate of whether the code is simple enough that HTML rendering will look acceptable. The program was written by Tomasz Wegrzanowski for use with MediaWiki; it's included as part of the MediaWiki package (http://www.mediawiki.org) and is under the GPL license. Please report bugs at: https://bugzilla.wikimedia.org/ with "MediaWiki extensions" as product and "texvc" as component. == Setup == === Requirements === OCaml 3.06 or later is required to compile texvc; this can be acquired from http://caml.inria.fr/ if your system doesn't have it available. The makefile requires GNU make. Rasterization is done via LaTeX, dvipng. These need to be installed and in the PATH: latex, dvipng AMS* packages for LaTeX also need to be installed. Without AMS* some equations will render correctly while others won't render. Most distributions of TeX already contain AMS*. In Debian/Ubuntu you need to install tetex-extra. To work properly with rendering non-ASCII Unicode characters, a supplemental TeX package is needed (cjk-latex in Debian) === Installation === Run 'make' (or 'gmake' if GNU make is not your default make). This should produce the texvc executable. Then you'll need to set $wgUseTeX to true in your LocalSettings.php. By default, MediaWiki will search in this directory for texvc, if you moved it elsewhere, you'll have to modify $wgTexvc and set it to the path of the texvc executable. == Usage == Normally texvc is called from MediaWiki's Math.php modules and everything Just Works. It can be run manually for testing or for use in another app. === Command-line parameters === texvc <temp directory> <output directory> <TeX code> <encoding> <color> Be sure to properly quote the TeX code! Example: texvc /home/wiki/tmp /home/wiki/math "y=x+2" iso-8859-1 "rgb 1.0 1.0 1.0" === Output format === Status codes and HTML/MathML transformations are returned on stdout. A rasterized PNG file will be written to the output directory, named for the MD5 hash code. texvc output format is like this: +%5 ok, but not html or mathml c%5%h ok, conservative html, no mathml m%5%h ok, moderate html, no mathml l%5%h ok, liberal html, no mathml C%5%h\0%m ok, conservative html, with mathml M%5%h\0%m ok, moderate html, with mathml L%5%h\0%m ok, liberal html, with mathml X%5%m ok, no html, with mathml S syntax error E lexing error F%s unknown function %s - other error \0 - null character %5 - md5, 32 hex characters %h - html code, without \0 characters %m - mathml code, without \0 characters == Troubleshooting == Unfortunately, many error conditions with rasterization are not well reported. texvc will return as though everything is successful, and the only obvious sign of problems for the user is a big X on a wiki page where an equation should be. Try running texvc from the command line to ensure that the software it relies upon is all set up. Ensure that the temporary and math directories exist and can be written to by the user account the web server runs under; if you don't control the server, you may have to make them world-writable. If some equations render correctly while others don't, you probably don't have AMS* packages for LaTeX installed. Most distributions of TeX come with AMS*. In Debian/Ubuntu AMS* is in tetex-extra package. To check if that is the problem you can try those two equations: x + y x \implies y The first uses only standard LaTeX, while the second uses symbol \implies from AMS*. If the first renders, but the second doesn't, you need to install AMS*. == Hacking == Before you start hacking on the math package its good to know the workflow, which is basically: 1. texvc gets called by Math/Math.body.php (check out the line begining with "$cmd") 2. texvc does its magic, which is basically to check for invalid latex code. 3. texvc takes the user input if valid and creates a latex file containing it, see get_preface in texutil.ml 4. dvipng(1) gets called to create a .png file See render.ml for this process (commenting out the removal of the temporary file is useful for debugging).