function render()
{
list($success, $res) = $this->invokeBlahtex($this->mr->tex, $this->mr->hash == null);
if (!$success) {
$this->errmsg = $res;
} else {
$parser = new blahtexOutputParser();
$output = $parser->parse($res);
$blahtexErrmsg = $this->processOutput($output);
if ($blahtexErrmsg && $this->errmsg) {
$this->errmsg = $blahtexErrmsg;
} else {
$this->errmsg = '';
}
}
}
/**
* Main function, which renders the LaTeX fragment.
* This function renders the LaTeX fragment specified in the
* constructor. The output depends on the output mode, set with
* setOutputMode(), as follows:
* - @c MW_MATH_PNG : Output is in PNG format, fall back to HTML.
* - @c MW_MATH_SIMPLE : Output is in HTML format if the HTML is
* simple and in PNG otherwise.
* - @c MW_MATH_HTML : Output is in HTML format, fall back to PNG.
* - @c MW_MATH_SOURCE : Output the LaTeX fragment verbatim,
* surrounded by a pair of @c $ characters.
* - @c MW_MATH_MODERN : Output is in HTML format unless the HTML
* is complicated, fall back to PNG.
* - @c MW_MATH_MATHML : Output is in MathML format, fall back to
* PNG.
*
* @return String containing HTML fragment, representing the
* formula in the given LaTeX fragment.
* @public
*/
function render()
{
global $wgBlahtex;
$fname = 'MathRenderer::render';
if ($this->mode == MW_MATH_SOURCE) {
# No need to render or parse anything more!
return '$ ' . htmlspecialchars($this->tex) . ' $';
}
if (!$this->_recall()) {
$res = $this->testEnvironment();
if ($res) {
return $res;
}
// Run texvc
list($success, $res) = $this->invokeTexvc($this->tex);
if (!$success) {
return $res;
}
$texvcError = $this->processTexvcOutput($res);
// Run blahtex, if configured
if ($wgBlahtex) {
list($success, $res) = $this->invokeBlahtex($this->tex, $this->hash == NULL);
if (!$success) {
return $res;
}
$parser = new blahtexOutputParser();
$res = $parser->parse($res);
wfDebug(print_r($res, TRUE));
$blahtexError = $this->processBlahtexOutput($res);
if ($blahtexError && $texvcError) {
return $blahtexError;
}
} else {
if ($texvcError) {
return $texvcError;
}
}
# Now save it back to the DB:
if (!wfReadOnly()) {
if ($this->hash) {
$outmd5_sql = pack('H32', $this->hash);
} else {
$outmd5_sql = '';
}
$md5_sql = pack('H32', $this->md5);
# Binary packed, not hex
$dbw =& wfGetDB(DB_MASTER);
$dbw->replace('math', array('math_inputhash'), array('math_inputhash' => $md5_sql, 'math_outputhash' => $outmd5_sql, 'math_html_conservativeness' => $this->conservativeness, 'math_html' => $this->html, 'math_mathml' => $this->mathml), $fname, array('IGNORE'));
}
}
return $this->_doRender();
}
