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Add SVG generation for LaTeXML 

Currently SVGs are generated only in
MathML mode but not in LaTeXML mode.
Since LaTeXML can benefit from the
SVGs as well this change introduces
the functionality to generate SVG
images from LaTeXML MathML input.

Generating SVG images for LaTeXML is an essential
part of Math 2.0. It enables to include LaTeXMLs Content
MathML and provides fallback
images for visitors with MathML disabled browsers.

Change-Id: If13a8b0825bf12dbfe4920ddb7ad552df9bc095f
This commit is contained in:
physikerwelt 2014-07-28 14:12:32 -04:00 committed by physikerwelt (Moritz Schubotz)
parent 272e6869ed
commit 6cb52f9190
1 changed files with 32 additions and 1 deletions
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33
MathLaTeXML.php
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@ -145,7 +145,6 @@ class MathLaTeXML extends MathMathML {
}
}
/**
* Internal version of @link self::embedMathML
* @return string
@ -174,6 +173,38 @@ class MathLaTeXML extends MathMathML {
return Xml::tags( 'span', $attribs, $mml );
}
/**
* Calculates the SVG image based on the MathML input
* No cache is used.
* @return boolean
*/
public function calulateSvg() {
$renderer = new MathMathML( $this->getTex() );
$renderer->setMathml( $this->getMathml() );
$renderer->setMode( MW_MATH_LATEXML );
$renderer->setPurge( true );
$res = $renderer->render();
if ( $res == true ) {
$this->svg = $renderer->getSvg();
} else {
$lastError = $renderer->getLastError();
wfDebugLog( 'Math', 'failed to convert LaTeXML-MathML to SVG:' . $lastError );
}
return $res;
}
/**
* Gets the SVG image
* Lazy evaluation: If no SVG image exists it's generated on the fly
* @return string XML-Document of the rendered SVG
*/
public function getSvg() {
if ( $this->isPurge() || $this->svg == '' ) {
$this->calulateSvg();
}
return $this->svg;
}
protected function getMathTableName() {
return 'mathlatexml';
}