7u83/processwire-TextformatterLatexMathML
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Uses katex now to convert latex to mathml.

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This commit is contained in:
7u83
2025-08-01 11:05:07 +02:00
parent bb37fc62bd
commit 8851ae4658
1 changed files with 61 additions and 6 deletions
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67
TextformatterLatexMathML.module
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@ -30,9 +30,59 @@ class TextFormatterLatexMathML extends Textformatter {
'href' => 'https://git.planix.org/7u83/processwire-TextformatterLatexMathML',
'requires' => array('ProcessWire>=3.0.0'),
);
}
}
public function format(&$str) {
function smartQuotesGermanHTML($html) {
$doc = new \DOMDocument();
libxml_use_internal_errors(true); // Verhindert Warnungen bei schlechtem HTML
$doc->loadHTML(mb_convert_encoding($html, 'HTML-ENTITIES', 'UTF-8'));
$xpath = new \DOMXPath($doc);
foreach ($xpath->query('//text()') as $textNode) {
$text = $textNode->nodeValue;
$r = $this->replaceQuotesInText($text);
$textNode->nodeValue = $r; //this->replaceQuotesInText($text);
}
// Nur <body> extrahieren, weil DOMDocument <html><body> etc. einfügt
$bodyNode = $doc->getElementsByTagName('body')->item(0);
$innerHTML = '';
foreach ($bodyNode->childNodes as $child) {
$innerHTML .= $doc->saveHTML($child);
}
return $innerHTML;
}
function replaceQuotesInText($text) {
static $isOpen = true;
$result = '';
$len = mb_strlen($text);
for ($i = 0; $i < $len; $i++) {
$char = mb_substr($text, $i, 1);
if ($char === '"') {
$result .= $isOpen ? '„' : '“';
$isOpen = !$isOpen;
} else {
$result .= $char;
}
}
return $result;
}
public function format(&$str) {
# $str = $this->smartQuotesGermanHTML($str);
# return;
// Regular expression to match LaTeX formulas within $ symbols
$latexPattern = '/(?<!\\\\)\$([^$\\\\]*(\\\\.[^$\\\\]*)*)\$/';
@ -43,7 +93,7 @@ class TextFormatterLatexMathML extends Textformatter {
$dom = new \DOMDocument('1.0', 'UTF-8');
// Load the HTML string into the DOMDocument
$dom->loadHTML('<?xml encoding="utf-8" ?><html>'.$inputString.'</html>', LIBXML_HTML_NOIMPLIED | LIBXML_HTML_NODEFDTD);
$dom->loadHTML('<?xml encoding="utf-8" ?'.'><html>'.$inputString.'</html>', LIBXML_HTML_NOIMPLIED | LIBXML_HTML_NODEFDTD);
// Create a DOMXPath object to navigate the DOMDocument
$xpath = new \DOMXPath($dom);
@ -92,7 +142,7 @@ class TextFormatterLatexMathML extends Textformatter {
// Define a callback function to convert the matched formula to MathML
function convertToMathML($matches) {
$cache = wire('cache');
# $cache->deleteAll();
# $cache->deleteAll();
// $matches[1] contains the matched substring within '$'
$formula = $matches[1];
@ -112,8 +162,12 @@ class TextFormatterLatexMathML extends Textformatter {
// Function to convert a formula to MathML
function convertFormulaToMathML($formula) {
$command = 'latexmlmath --quiet -';
$inputString = '$'.$formula.'$';
# $command = 'latexmlmath --quiet -';
#
$command = '/usr/local/bin/katex --format mathml';
# $inputString = '$'.$formula.'$';
$inputString = $formula;
// Construct the full command with the input string
@ -122,6 +176,7 @@ class TextFormatterLatexMathML extends Textformatter {
// Execute the command and capture the output
$output = shell_exec($fullCommand);
$output = str_replace(' xmlns="http://www.w3.org/1998/Math/MathML"', '', $output);
return $output;
}