Set version to 0.9.1
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<?php
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<?php
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/*
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/*
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Copyright (C) 2023 by 7u83 7u83@mail.ru
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Copyright (C) 2023 by 7u83 7u83@mail.ru
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Permission to use, copy, modify, and/or distribute this software
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Permission to use, copy, modify, and/or distribute this software
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for any purpose with or without fee is hereby granted.
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for any purpose with or without fee is hereby granted.
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THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
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THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
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WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
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WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
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WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
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AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
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AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
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DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
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DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
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DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
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DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
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OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE
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OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE
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*/
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*/
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namespace ProcessWire;
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namespace ProcessWire;
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class TextFormatterLatexMathML extends Textformatter {
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class TextFormatterLatexMathML extends Textformatter {
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public static function getModuleInfo() {
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public static function getModuleInfo() {
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return array(
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return array(
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'title' => 'LatexMathML Text Formatter',
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'title' => 'LatexMathML Text Formatter',
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'version' => '1.0.0',
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'version' => '0.9.1',
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'summary' => 'Replaces $latexformula$ with inline MathML',
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'summary' => 'Replaces $latexformula$ with inline MathML',
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'author' = '7u83',
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'author' = '7u83',
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'autoload' => true,
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'autoload' => true,
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'singular' => true,
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'singular' => true,
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'href' => 'https://git.planix.org/7u83/processwire-TextformatterLatexMathML',
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'href' => 'https://git.planix.org/7u83/processwire-TextformatterLatexMathML',
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'requires' => array('ProcessWire>=3.0.0'),
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'requires' => array('ProcessWire>=3.0.0'),
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);
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);
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}
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}
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public function format(&$str) {
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public function format(&$str) {
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// Regular expression to match LaTeX formulas within $ symbols
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// Regular expression to match LaTeX formulas within $ symbols
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$latexPattern = '/(?<!\\\\)\$([^$\\\\]*(\\\\.[^$\\\\]*)*)\$/';
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$latexPattern = '/(?<!\\\\)\$([^$\\\\]*(\\\\.[^$\\\\]*)*)\$/';
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$inputString = $str;
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$inputString = $str;
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// Create a DOMDocument object
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// Create a DOMDocument object
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$dom = new \DOMDocument('1.0', 'UTF-8');
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$dom = new \DOMDocument('1.0', 'UTF-8');
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// Load the HTML string into the DOMDocument
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// Load the HTML string into the DOMDocument
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$dom->loadHTML('<?xml encoding="utf-8" ?><html>'.$inputString.'</html>', LIBXML_HTML_NOIMPLIED | LIBXML_HTML_NODEFDTD);
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$dom->loadHTML('<?xml encoding="utf-8" ?><html>'.$inputString.'</html>', LIBXML_HTML_NOIMPLIED | LIBXML_HTML_NODEFDTD);
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// Create a DOMXPath object to navigate the DOMDocument
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// Create a DOMXPath object to navigate the DOMDocument
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$xpath = new \DOMXPath($dom);
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$xpath = new \DOMXPath($dom);
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// Find all <p>, <div>, <span> ... elements
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// Find all <p>, <div>, <span> ... elements
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$elements = $xpath->query('//p | //div | //span | //strong | //b | //i | //em');
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$elements = $xpath->query('//p | //div | //span | //strong | //b | //i | //em');
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$nodesForReplacement = array();
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$nodesForReplacement = array();
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// Iterate through the elements and create and arraz of nodes to modify
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// Iterate through the elements and create and arraz of nodes to modify
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foreach ($elements as $element) {
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foreach ($elements as $element) {
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foreach ($element->childNodes as $node) {
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foreach ($element->childNodes as $node) {
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if ($node->nodeType === XML_TEXT_NODE) {
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if ($node->nodeType === XML_TEXT_NODE) {
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// convert $formula$ to mathml
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// convert $formula$ to mathml
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$modifiedValue = preg_replace_callback($latexPattern, array($this,'convertToMathML'), $node->nodeValue);
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$modifiedValue = preg_replace_callback($latexPattern, array($this,'convertToMathML'), $node->nodeValue);
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// unescape esaped $-signs
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// unescape esaped $-signs
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$modifiedValue = str_replace('\$', '$',$modifiedValue);
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$modifiedValue = str_replace('\$', '$',$modifiedValue);
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// Save the node and its modified content for later replacement
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// Save the node and its modified content for later replacement
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$nodesForReplacement[] = array(
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$nodesForReplacement[] = array(
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'node' => $node,
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'node' => $node,
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'modifiedValue' => $modifiedValue
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'modifiedValue' => $modifiedValue
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);
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);
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}
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}
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}
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}
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}
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}
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// Replace the nodes
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// Replace the nodes
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foreach ($nodesForReplacement as $replacement) {
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foreach ($nodesForReplacement as $replacement) {
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$fragment = $dom->createDocumentFragment();
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$fragment = $dom->createDocumentFragment();
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$fragment->appendXML($replacement['modifiedValue']);
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$fragment->appendXML($replacement['modifiedValue']);
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$replacement['node']->parentNode->replaceChild($fragment, $replacement['node']);
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$replacement['node']->parentNode->replaceChild($fragment, $replacement['node']);
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}
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}
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// Output the modified HTML
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// Output the modified HTML
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$str = str_replace(array('<html>','</html>') , '' , $dom->saveHTML($dom->documentElement));
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$str = str_replace(array('<html>','</html>') , '' , $dom->saveHTML($dom->documentElement));
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}
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}
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// Define a callback function to convert the matched formula to MathML
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// Define a callback function to convert the matched formula to MathML
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function convertToMathML($matches) {
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function convertToMathML($matches) {
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$cache = wire('cache');
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$cache = wire('cache');
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// $matches[1] contains the matched substring within '$'
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// $matches[1] contains the matched substring within '$'
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$formula = $matches[1];
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$formula = $matches[1];
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$cn = "TFLatexMathML$formula";
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$cn = "TFLatexMathML$formula";
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$mathml = base64_decode($cache->get($cn));
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$mathml = base64_decode($cache->get($cn));
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if ($mathml)
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if ($mathml)
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return $mathml;
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return $mathml;
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$mathml = $this->convertFormulaToMathML($formula);
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$mathml = $this->convertFormulaToMathML($formula);
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$cache->save($cn,base64_encode($mathml));
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$cache->save($cn,base64_encode($mathml));
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// Return the processed result as the replacement
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// Return the processed result as the replacement
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return $mathml;
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return $mathml;
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}
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}
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// Function to convert a formula to MathML
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// Function to convert a formula to MathML
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function convertFormulaToMathML($formula) {
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function convertFormulaToMathML($formula) {
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$command = 'latexmlmath --quiet -';
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$command = 'latexmlmath --quiet -';
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$inputString = '$'.$formula.'$';
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$inputString = '$'.$formula.'$';
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// Construct the full command with the input string
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// Construct the full command with the input string
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$fullCommand = sprintf('echo %s | %s', escapeshellarg($inputString), $command);
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$fullCommand = sprintf('echo %s | %s', escapeshellarg($inputString), $command);
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// Execute the command and capture the output
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// Execute the command and capture the output
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$output = shell_exec($fullCommand);
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$output = shell_exec($fullCommand);
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return $output;
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return $output;
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}
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}
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}
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}
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