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SpecialPage for MathImages 

Add new special page that displays
math images. (Either SVG- or PNG-Images)

Change-Id: I6065b474b8197232fcb4e79ae17bb08d9bef3ac4
This commit is contained in:
physikerwelt (Moritz Schubotz) 2014-06-06 00:12:33 +02:00
parent 9a645d96df
commit 8bc23cafb4
3 changed files with 129 additions and 0 deletions
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14
Math.alias.php Normal file
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@ -0,0 +1,14 @@
<?php
/**
* Aliases for Math
*
* @file
* @ingroup Extensions
*/
$specialPageAliases = array();
/** English (English) */
$specialPageAliases['en'] = array(
'MathShowImage' => array( 'MathShowImage', 'MathShowImage' ) // No need to translate! The PageTitle does not appear.
);

4
Math.php
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@ -211,11 +211,15 @@ $wgAutoloadClasses['MathMathML'] = $dir . 'MathMathML.php';
$wgAutoloadClasses['MathLaTeXML'] = $dir . 'MathLaTeXML.php';
$wgAutoloadClasses['MathInputCheck'] = $dir . 'MathInputCheck.php';
$wgAutoloadClasses['MathInputCheckTexvc'] = $dir . 'MathInputCheckTexvc.php';
$wgAutoloadClasses['SpecialMathShowImage'] = $dir . 'SpecialMathShowImage.php';
$wgMessagesDirs['Math'] = __DIR__ . '/i18n';
$wgExtensionMessagesFiles['Math'] = $dir . 'Math.i18n.php';
$wgExtensionMessagesFiles['MathAlias'] = $dir . 'Math.alias.php';
$wgParserTestFiles[] = $dir . 'mathParserTests.txt';
$wgSpecialPageGroups[ 'MathShowImage' ] = 'other';
$wgSpecialPages['MathShowImage'] = 'SpecialMathShowImage';
$wgResourceModules['ext.math.styles'] = array(
'localBasePath' => __DIR__ . '/modules',

111
SpecialMathShowImage.php Normal file
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@ -0,0 +1,111 @@
<?php
/**
* Description of SpecialMathShowSVG
*
* @author Moritz Schubotz (Physikerwelt)
*/
class SpecialMathShowImage extends SpecialPage {
private $noRender = false;
private $renderer = null;
private $mode = false;
function __construct() {
parent::__construct( 'MathShowImage' );
}
/**
* Sets headers - this should be called from the execute() method of all derived classes!
*/
function setHeaders( $success = true ) {
$out = $this->getOutput();
$request = $this->getRequest();
$out->setArticleBodyOnly( true );
$out->setArticleRelated( false );
$out->setRobotPolicy( "noindex,nofollow" );
$out->disable();
if ( $success && $this->mode == MW_MATH_PNG ) {
$request->response()->header( "Content-type: image/png;" );
} else {
$request->response()->header( "Content-type: image/svg+xml; charset=utf-8" );
}
if ( $success && !( $this->noRender ) ) {
$request->response()->header( 'Cache-Control: public max-age=2419200' ); // 4 weeks
$request->response()->header( 'Vary: User-Agent' );
}
}
function execute( $par ) {
$request = $this->getRequest();
$hash = $request->getText( 'hash', '' );
$tex = $request->getText( 'tex', '');
$asciimath = $request->getText( 'asciimath', '');
$this->mode = $request->getInt( 'mode', MW_MATH_MATHML );
if ( $hash === '' && $tex === '' && $asciimath === '' ) {
$this->setHeaders( false );
echo $this->printSvgError( 'No Inputhash specified' );
} else {
if ( $tex === '' && $asciimath === ''){
switch ( $this->mode ) {
case MW_MATH_PNG:
$this->renderer = MathTexvc::newFromMd5( $hash );
break;
case MW_MATH_LATEXML:
$this->renderer = MathLaTeXML::newFromMd5( $hash );
break;
default:
$this->renderer = MathMathML::newFromMd5( $hash );
}
$this->noRender = $request->getBool( 'noRender', false );
if ( $this->noRender ) {
$success = $this->renderer->readFromDatabase();
} else {
if ( $this->mode == MW_MATH_PNG ) {
$mmlRenderer = MathMathML::newFromMd5( $hash );
$mmlRenderer->readFromDatabase();
$this->renderer = new MathTexvc( $mmlRenderer->getUserInputTex() );
}
$success = $this->renderer->render();
}
} elseif ( $asciimath === '' ) {
$this->renderer = MathRenderer::getRenderer( $tex , array(), $this->mode );
$success = $this->renderer->render();
} else {
$this->renderer = MathRenderer::getRenderer( $asciimath , array( 'type' => 'ascii' ), $this->mode );
$success = $this->renderer->render();
}
if ( $success ) {
if ( $this->mode == MW_MATH_PNG ) {
$output = $this->renderer->getPng();
} else {
$output = $this->renderer->getSvg();
}
} else {
// Error message in PNG not supported
$output = $this->printSvgError( $this->renderer->getLastError() );
}
if ( $output == "" ) {
$output = $this->printSvgError( 'No Output produced' );
$success = false;
}
$this->setHeaders( $success );
echo $output;
$this->renderer->writeCache();
}
}
/**
* Prints the specified error message as svg.
* @param string $msg error message
* @return xml svg image with the error message
*/
private function printSvgError( $msg ) {
global $wgMathDebug;
$result = '<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 100 4"
preserveAspectRatio="xMidYMid meet" >' .
'<text text-anchor="start" fill="red" y="2">' . htmlspecialchars( $msg ) . '</text></svg>';
if ( $wgMathDebug ) {
$result .= '<!--'. var_export($this->renderer, true) .'-->';
}
return $result;
}
}