27 lines
811 B
JavaScript
27 lines
811 B
JavaScript
// markdown-it plugin for generating line numbers.
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// It depends on preWrapper plugin.
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module.exports = md => {
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const fence = md.renderer.rules.fence
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md.renderer.rules.fence = (...args) => {
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const rawCode = fence(...args)
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const code = rawCode.slice(
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rawCode.indexOf('<code>'),
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rawCode.indexOf('</code>')
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)
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const lines = code.split('\n')
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const lineNumbersCode = [...Array(lines.length - 1)]
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.map((line, index) => `<span class="line-number">${index + 1}</span><br>`).join('')
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const lineNumbersWrapperCode
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= `<div class="line-numbers-wrapper">${lineNumbersCode}</div>`
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const finalCode = rawCode
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.replace('<!--beforeend-->', `${lineNumbersWrapperCode}<!--beforeend-->`)
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.replace('extra-class', 'line-numbers-mode')
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return finalCode
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}
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}
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