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/**
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 * Patches showdown to unrestrictedly unhash HTML spans.
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 * @param {import('showdown')} showdown The showdown object to patch
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 */
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export function addShowdownPatch(showdown) {
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    showdown.subParser('unhashHTMLSpans', function (text, options, globals) {
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        'use strict';
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        text = globals.converter._dispatch('unhashHTMLSpans.before', text, options, globals);
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        for (var i = 0; i < globals.gHtmlSpans.length; ++i) {
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            var repText = globals.gHtmlSpans[i],
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                // limiter to prevent infinite loop (assume 10 as limit for recurse)
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                limit = 0;
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            while (/¨C(\d+)C/.test(repText)) {
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                var num = RegExp.$1;
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                repText = repText.replace('¨C' + num + 'C', globals.gHtmlSpans[num]);
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                if (limit === 10000) {
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                    console.error('maximum nesting of 10000 spans reached!!!');
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                    break;
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                }
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                ++limit;
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            }
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            text = text.replace('¨C' + i + 'C', repText);
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        }
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        text = globals.converter._dispatch('unhashHTMLSpans.after', text, options, globals);
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        return text;
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    });
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}