Userscript to link to open tab tab page in Markdown or Zimwiki markup syntax, through a menu command or the 'ctrl-alt-c m' and 'ctrl-alt-c z' keyboard shortcuts

markdown_link.user.js

// ==UserScript==
// @name        Copy link to this page as Markdown
// @icon        https://upload.wikimedia.org/wikipedia/commons/4/48/Markdown-mark.svg
// @homepageURL https://gist.github.com/diogotito/8523ae0c9cee3db96ada0a6f2378d9d9
// @downloadURL https://gist.github.com/diogotito/8523ae0c9cee3db96ada0a6f2378d9d9/raw/markdown_link.user.js
// @namespace   https://gist.github.com/diogotito
// @match       *://*/*
// @noframes
// @grant       GM_notification
// @grant       GM_setClipboard
// @grant       GM_registerMenuCommand
// @grant       GM_getResourceURL
// @require     https://cdn.jsdelivr.net/npm/@violentmonkey/shortcut@1
// @version     1.0
// @author      diogotito
// @description 10/5/2022, 10:49:21 AM
// @resource    markdown_logo https://upload.wikimedia.org/wikipedia/commons/4/48/Markdown-mark.svg
// @resource    html_logo https://upload.wikimedia.org/wikipedia/commons/6/61/HTML5_logo_and_wordmark.svg
// @resource    latex_logo https://upload.wikimedia.org/wikipedia/commons/9/92/LaTeX_logo.svg
// @resource    zimwiki_logo https://zim-wiki.org/images/globe.png
// ==/UserScript==

const genShortcuts = (key) =>
    ['', 'ctrl-', 'alt-', 'ctrl-alt-']
      .map(mods => `ctrl-alt-c ${mods}${key}`)

//== Linkers =============================================================

registerLinker({
  name: "Markdown",
  formatter: (title, url) => `[${url}](${title})`,
  imageURL: GM_getResourceURL('markdown_logo'),
  shortcuts: genShortcuts('m'),
})

registerLinker({
  name: "HTML",
  formatter: (title, url) => `<a href="${url}">${title}</a>`,
  imageURL: GM_getResourceURL('html_logo'),
  shortcuts: genShortcuts('h'),
})

registerLinker({
  name: "LaTeX (hyperref)",
  formatter: (title, url) => String.raw`\href{${url}}{${title}}`,
  imageURL: GM_getResourceURL('latex_logo'),
  shortcuts: genShortcuts('l'),
})

registerLinker({
  name: "Zimwiki",
  formatter: (title, url) => `[[${url}|${title}]]`,
  imageURL: GM_getResourceURL('zimwiki_logo'),
  shortcuts: genShortcuts('z'),
})

//========================================================================

function registerLinker({name, imageURL, shortcuts=[], formatter}) {
  GM_registerMenuCommand(`Link as ${name} (${shortcuts[0]})`, doLink)

  for (const shortcut of shortcuts) {
    VM.shortcut.register(shortcut, doLink)
  }

  function doLink(_event) {
    const cb = formatter(document.title, window.location)
    GM_setClipboard(cb)
    GM_notification({
      title: `Copied ${name} link`,
      text: cb,
      image: imageURL,
    })
  }
}