100 lines
3.2 KiB
PHP
100 lines
3.2 KiB
PHP
<?php
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/*
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Plugin Name: SyntaxHighlighter-NG
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Version: 1.0
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Plugin URI: https://git.la10cy.net/DeltaLima/flatpress-plugin-syntaxhighlighter-ng
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Description: <a href="https://git.la10cy.net/DeltaLima/flatpress-plugin-syntaxhighlighter-ng/">SyntaxHighlighter-NG 1.0.0</a> (forked from <a href="https://forum.flatpress.org/viewtopic.php?p=1130&hilit=syntax+highlight#p1135">Arvid's forum post</a>, using now <a href="https://prismjs.com">prism.js</a>)
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Author: 2005 NoWhereMan, 2023 DeltaLima
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Author URI: https://deltalima.org
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*/
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function plugin_syntaxhighlighter_add($lang=null) {
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static $languages = array();
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$pdir=plugin_geturl('syntaxhighlighter');
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// create array containing the used languages
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$languages[] = "{$lang}";
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// remove unique
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$languages = array_unique($languages);
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return $languages;
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}
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function plugin_syntaxhighlighter_head() {
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$pdir=plugin_geturl('syntaxhighlighter');
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echo <<<PRISMJS
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<!-- start of prism.js -->
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<link rel="stylesheet" type="text/css" href="{$pdir}res/prism.okaidia.css" />
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<!-- end of prism.js -->
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PRISMJS;
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}
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add_action('wp_head', 'plugin_syntaxhighlighter_head');
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function plugin_syntaxhighlighter_foot() {
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// convert the returned array into an json one, to have an easier time
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// giving it to the javascript below
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$used_languages = json_encode(plugin_syntaxhighlighter_add());
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$pdir=plugin_geturl('syntaxhighlighter');
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// javascript part
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echo <<<PRISMBOX
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<!-- start of prism.js -->
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<script type="text/javascript" src="{$pdir}res/prism.full.js"></script>
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<!-- wrapping the content of pre html-tags into code-tags, as said in https://prismjs.com/index.html#basic-usage -->
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<script type="text/javascript">
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// wrap the content of <pre> elements into <code></code> for prismjs
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// get an array of <pre></pre> elements
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//var preEl = document.getElementsByTagName("pre");
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// split used_languages list into array
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let used_languages = $used_languages;
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// iterate through all used_languages
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for (let iUl = 0;iUl < used_languages.length; iUl++)
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{
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// handle [code] without language definition as "none"
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// and we have to look for them up a bit different
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if ( used_languages[iUl] == "" )
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{
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used_languages[iUl] == "none"
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var preElements = document.querySelectorAll("pre:not([class])");
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} else {
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var preElements = document.querySelectorAll("pre." + used_languages[iUl]);
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}
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// iterate through all <pre>
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for (let iEl = 0;iEl < preElements.length; iEl++)
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{
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org_html = preElements[iEl].innerHTML;
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new_html = "<code class=\"language-" + used_languages[iUl] + "\">" + org_html + "</code>";
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preElements[iEl].innerHTML = new_html;
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}
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}
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</script>
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<!-- end of prism.js -->
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PRISMBOX;
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}
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add_action('wp_footer', 'plugin_syntaxhighlighter_foot');
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?>
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