forked from Shinonome/dots-hyprland
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end-4
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// SPDX-FileCopyrightText: 2021 Uwe Jugel
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// SPDX-License-Identifier: MIT
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// This file is part of md2pango (https://github.com/ubunatic/md2pango).
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const monospaceFonts = 'JetBrains Mono NF, JetBrains Mono Nerd Font, JetBrains Mono NL, SpaceMono NF, SpaceMono Nerd Font, monospace'
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const H1 = "H1", H2 = "H2", H3 = "H3", H4 = "H4", H5 = "H5", BULLET = "BULLET", NUMBERING = "NUMBERING", CODE = "CODE"
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const BOLD = "BOLD", EMPH = "EMPH", INLCODE = "INLCODE", LINK = "LINK", HEXCOLOR = "HEXCOLOR", UND = "UND"
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let sub_h1, sub_h2, sub_h3, sub_h4, sub_h5
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// m2p_sections defines how to detect special markdown sections.
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// These expressions scan the full line to detect headings, lists, and code.
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const m2p_sections = [
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// h1 is actually 210% on github, but it's unecessary large imo
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sub_h1 = { name: H1, re: /^(#\s+)(.*)(\s*)$/, sub: "<span font_weight='bold' size='150%'>$2</span>" },
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sub_h2 = { name: H2, re: /^(##\s+)(.*)(\s*)$/, sub: "<span font_weight='bold' size='125%'>$2</span>" },
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sub_h3 = { name: H3, re: /^(###\s+)(.*)(\s*)$/, sub: "<span font_weight='bold' size='100%'>$2</span>" },
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sub_h4 = { name: H4, re: /^(####\s+)(.*)(\s*)$/, sub: "<span font_weight='bold' size='90%'>$2</span>" },
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sub_h5 = { name: H5, re: /^(#####\s+)(.*)(\s*)$/, sub: "<span font_weight='bold' size='80%'>$2</span>" },
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{ name: BULLET, re: /^(\s*)([\*\-]\s)(.*)(\s*)$/, sub: "$1• $3" },
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{ name: NUMBERING, re: /^(\s*[0-9]+\.\s)(.*)(\s*)$/, sub: " $1$2" },
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]
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// m2p_styles defines how to replace inline styled text
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const m2p_styles = [
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{ name: BOLD, re: /(\*\*)(\S[\s\S]*?\S)(\*\*)/g, sub: "<b>$2</b>" },
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{ name: UND, re: /(__)(\S[\s\S]*?\S)(__)/g, sub: "<u>$2</u>" },
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{ name: EMPH, re: /\*(\S.*?\S)\*/g, sub: "<i>$1</i>" },
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// { name: EMPH, re: /_(\S.*?\S)_/g, sub: "<i>$1</i>" },
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{ name: HEXCOLOR, re: /#([A-Fa-f0-9]{6}|[A-Fa-f0-9]{3})/g, sub: `<span bgcolor='#$1' fgcolor='#000000' font_family='${monospaceFonts}'> #$1 </span>` },
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{ name: INLCODE, re: /(`)([^`]*)(`)/g, sub: `<span font_weight='bold' font_family='${monospaceFonts}' bgcolor='#000000' fgcolor='#ffffff'> $2 </span>` },
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// { name: UND, re: /(__|\*\*)(\S[\s\S]*?\S)(__|\*\*)/g, sub: "<u>$2</u>" },
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]
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const re_comment = /^\s*<!--.*-->\s*$/
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const re_color = /^(\s*<!--\s*(fg|bg)=(#?[0-9a-z_A-Z-]*)\s*((fg|bg)=(#?[0-9a-z_A-Z-]*))?\s*-->\s*)$/
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const re_reset = /(<!--\/-->)/
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const re_uri = /http[s]?:\/\/[^\s']*/
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const re_href = "/href='(http[s]?:\\/\\/[^\\s]*)'"
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const re_atag = "<a\s.*>.*(http[s]?:\\/\\/[^\\s]*).*</a>/"
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const re_h1line = /^===+\s*$/
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const re_h2line = /^---+\s*$/
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const m2p_escapes = [
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[/<!--.*-->/, ''],
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[/&/g, '&'],
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[/</g, '<'],
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[/>/g, '>'],
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]
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const code_color_span = "<span foreground='#bbb' background='#222'>"
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const escape_line = (line) => m2p_escapes.reduce((l, esc) => l.replace(...esc), line)
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const pad = (lines, start = 1, end = 1) => {
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let len = lines.reduce((n, l) => l.length > n ? l.length : n, 0)
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return lines.map((l) => l.padEnd(len + end, ' ').padStart(len + end + start, ' '))
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}
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export function convert(text) {
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let lines = text.split('\n')
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// Indicates if the current line is within a code block
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let is_code = false
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let code_lines = []
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let output = []
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let color_span_open = false
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let tt_must_close = false
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const try_close_span = () => {
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if (color_span_open) {
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output.push('</span>')
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color_span_open = false
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}
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}
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const try_open_span = () => {
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if (!color_span_open) {
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output.push('</span>')
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color_span_open = false
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}
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}
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for (const line of lines) {
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// first parse color macros in non-code texts
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if (!is_code) {
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let colors = line.match(re_color)
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if (colors || line.match(re_reset)) {
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try_close_span()
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}
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if (colors) {
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try_close_span()
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if (color_span_open) {
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close_span()
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}
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let fg = colors[2] == 'fg' ? colors[3] : colors[5] == 'fg' ? colors[6] : ''
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let bg = colors[2] == 'bg' ? colors[3] : colors[5] == 'bg' ? colors[6] : ''
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let attrs = ''
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if (fg != '') {
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attrs += ` foreground='${fg}'`
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}
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if (bg != '') {
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attrs += ` background='${bg}'`
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}
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if (attrs != '') {
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output.push(`<span${attrs}>`)
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color_span_open = true
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}
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}
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}
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// all macros processed, let's remove remaining comments
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if (line.match(re_comment)) {
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continue
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}
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// is this line an opening statement of a code block
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let code_start = false
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// escape all non-verbatim text
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let result = is_code ? line : escape_line(line)
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for (const { name, re, sub } of m2p_sections) {
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if (line.match(re)) {
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if (name === CODE) {
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if (!is_code) {
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// haven't been inside a code block, so ``` indicates
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// that it is starting now
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code_start = true
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is_code = true
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if (color_span_open) {
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// cannot color
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result = '<tt>'
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tt_must_close = false
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} else {
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result = code_color_span + '<tt>'
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tt_must_close = true
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}
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} else {
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// the code block ends now
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is_code = false
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output.push(...pad(code_lines).map(escape_line))
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code_lines = []
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result = '</tt>'
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if (tt_must_close) {
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result += '</span>'
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tt_must_close = false
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}
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}
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} else {
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if (is_code) {
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result = line
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} else {
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result = line.replace(re, sub)
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}
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}
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}
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}
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if (is_code && !code_start) {
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code_lines.push(result)
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continue
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}
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if (line.match(re_h1line)) {
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output.push(`# ${output.pop()}`.replace(sub_h1.re, sub_h1.sub))
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continue
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}
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if (line.match(re_h2line)) {
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output.push(`## ${output.pop()}`.replace(sub_h2.re, sub_h2.sub))
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continue
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}
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// all other text can be styled
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for (const style of m2p_styles) {
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result = result.replace(style.re, style.sub)
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}
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// all raw urls can be linked if possible
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let uri = result.match(re_uri) // look for any URI
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let href = result.match(re_href) // and for URIs in href=''
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let atag = result.match(re_atag) // and for URIs in <a></a>
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href = href && href[1] == uri
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atag = href && atag[1] == uri
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if (uri && (href || atag)) {
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result = result.replace(uri, `<a href='${uri}'>${uri}</a>`)
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}
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output.push(result)
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}
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try_close_span()
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// remove trailing whitespaces
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output = output.map(line => line.replace(/ +$/, ''))
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return output.join('\n')
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}
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const readFile = (f) => {
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// node.js only and when running from the command line
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const fs = require('fs')
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return fs.readFileSync(f, 'utf8')
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}
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let __is_nodejs_main = false
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try {
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// node.js specific checks and exports
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__is_nodejs_main = (require.main === module)
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exports.convert = convert
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} catch (e) { }
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if (__is_nodejs_main) {
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// running in node.js called from the CLI
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let args = process.argv.slice(2)
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if (args.length == 0 || args.find((a) => a == '-h')) {
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console.log(`Usage: ${process.argv[1]} FILE [FILE...]`)
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process.exit(0)
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}
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args.forEach((f) => process.stdout.write(convert(readFile(f))))
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}
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export const markdownTest = `# Heading 1
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## Heading 2
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### Heading 3
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#### Heading 4
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##### Heading 5
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1. yes
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2. no
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127. well
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- Bulletpoint starting with minus
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* Bulletpoint starting with asterisk
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---
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- __Underline__ __ No underline __
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- **Bold** ** No bold **
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- _Italics1_ *Italics2* _ No Italics _
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- A color: #D6BAFF
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- nvidia green: #7ABB08
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- sub-item
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\`\`\`javascript
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// A code block!
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myArray = [23, 123, 43, 54, '6969'];
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console.log('uwu');
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\`\`\`
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To update arch lincox, run \`sudo pacman -Syu\`
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`;
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