[Let] T/U box

karubabu — 2017-10-22T10:36:06Z
/*
 * @title T/U box
 * @description w/ "{title} {url}" format. easy copyable title/url box; click to copy, double-click outer to close
 * @include http://*
 * @include https://*
 * @contributor	pacochi	http://let.hatelabo.jp/pacochi/let/hJme3OvVzN41
 * @contributor noromanba http://let.hatelabo.jp/noromanba/let/hJme3Pyylqos
 * @license MIT License	https://opensource.org/licenses/MIT
 * @javascript_url
 */

/* modifications

* Show confirm dialog for doubtful URL
 (location.pushState/replace will cause mismatch between meta URLs and current URL)
* Fix copy format
* Add Title+URL format
* Append location.hash
* Avoid to use array for querySelector (for cloudflare rocket.js)
* Close on click anywhere
* support relative URL

*/

(() => {
  'use strict';

  // https://gist.github.com/noromanba/d730ccf3ae5e6916cd60
  const canonical_base = 
        (document.querySelector('head meta[property="og:url"][content]') || {}).content ||
        (document.querySelector('head link[rel="canonical"][href]') || {}).href ||
        '';
  const prefix = canonical_base.startsWith('/') ? location.origin : '';
  const canonical = canonical_base ? prefix + canonical_base + location.hash : null;
  const title = document.title;
  
  const url =
        (!canonical && location.href) ||
        (new URL(canonical).pathname === location.pathname && canonical) ||
        (confirm(`次のURLがmetaタグから見つかりましたが、現在のpathと異なります。\nキャンセルを押すとlocation.hrefを使用します。\n${canonical}`) && canonical) ||
        location.href;

  const box = document.body.appendChild(Object.assign(document.createElement('div'), {
    id: 'copy-buttons',
    style: `
background-color: white;
border: 1px solid silver;
padding: 1em;
position: fixed;
top: 0;
left: 0;
z-index: ${Number.MAX_SAFE_INTEGER || Number.MAX_VALUE};
`,
  }));
  const onClose = e => {
    box.parentNode.removeChild(box);
    document.removeEventListener('click', onClose);
    e.stopPropagation();
  };
  
  box.addEventListener('click', e => e.stopPropagation());
  box.addEventListener('dblclick', onClose);
  document.addEventListener('click', onClose);
  
  // TBD alignment
  [
    { label: 'URL', value: url },
    { label: 'Title', value: title },
    { label: 'Title + URL', value: title + ' ' + url },
    { label: 'HatenaSyntax', value: `[${url}:title=${title}]` },
    { label: 'Markdown', value: `[${title}](${url})` },
  ].forEach(({label, value}) => {
    box.appendChild(Object.assign(document.createElement('label'), {
      style: `
display: block;
color: black;
background-color: silver;
text-align: left;
`,
      textContent: `${label}: `,
    })).appendChild(Object.assign(document.createElement('input'), {
      style: `
color: black;
background-color: silver;
margin: 0.5em;
`,
      value,
    })).addEventListener('click', e => {
      e.target.select();
      document.execCommand('copy');
      e.stopPropagation();
    });
  });
})();
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[Let] T/U box
