GreasyFork script icon

On a script info page it shows its icon from the script meta block
Verze ze dne 17. 02. 2020. Zobrazit nejnovější verzi.
Zeptejte se na otázku, přidejte recenzi nebo skript nahlašte.
Wrap lines
// ==UserScript==
// @name        GreasyFork script icon
// @namespace   wOxxOm.scripts
// @description On a script info page it shows its icon from the script meta block
// @icon        https://icons.iconarchive.com/icons/custom-icon-design/mono-general-1/64/information-icon.png
// @version     1.1.6
// @author      wOxxOm
// @match       https://greasyfork.org/*scripts/*
// @include     /^https://(sleazy)fork.org/.*?scripts/.*?/
// @exclude     /^https://(greasy|sleazy)fork\.org/([^/]+/)?scripts/(\D|$)/
// @run-at      document-start
// @connect-src *
// @grant       GM_xmlhttpRequest
// @grant       GM_setValue
// @grant       GM_getValue
// ==/UserScript==

var scriptID = location.href.match(/scripts\/(\d+)/)[1];
var iconsrc = GM_getValue(scriptID);

if (iconsrc && iconsrc.match(/^data:image|https:/))
  addIcon();
else {
  GM_xmlhttpRequest({
    method: 'GET',
    url: location.pathname.replace(/(scripts\/\d+[^/]+)(\/.*)?$/,'$1/code/1.user.js'),
    timeout: 10000,
    onload: function (r) {
      var m = r.responseText.match(/\n\s*\/\/\s+@icon(?:url)?\s+(https?|data)(:(?:\/\/|image).*?)[\s\r\n]/i);
      if (!m)
        return;

      if (m[1] == 'https' || m[1] == 'data')
        return addIcon(m[1]+m[2]);

      // download http icon and store it in script db if it's small
      GM_xmlhttpRequest({
        method: 'GET',
        url: m[1]+m[2],
        timeout: 10000,
        headers: {'Accept':'image/png,image/*;q=0.8,*/*;q=0.5'},
        overrideMimeType: 'text\/plain; charset=x-user-defined',
        onload: function(ri) {
          var rb = ri.response, rbl = rb.length;
          if (rbl > 100000) {
            console.log('Script icon exceeds 100k, ignoring');
            return;
          }

          var ext = ri.finalUrl.substr(ri.finalUrl.lastIndexOf('.')+1).toLowerCase();
          var mime = ['png','bmp','gif'].indexOf(ext) >= 0 ? ext : ext.match(/'^jpe?g?/) ? 'jpeg' : ext=='ico' ? 'x-icon' : null;
          if (!mime)
            return;

          var rb8 = new Uint8Array(rbl);
          for (var i=0; i<rbl; i++)
            rb8[i] = rb.charCodeAt(i);
          var rbs = String.fromCharCode.apply(null, rb8);

          addIcon('data:image/' + mime + ';base64,' + btoa(rbs));
        }
      });
    }
  });
}

function addIcon(url) {
  if (url)
    iconsrc = url;

  var h2 = document.querySelector('#script-info header h2');
  h2 ? __add(h2) : __wait();

  function __add(h2) {
    if (!h2)
      if (!(h2 = document.querySelector('#script-info header h2')))
        return;

    h2.insertAdjacentHTML('afterbegin','<div style="\
        position: absolute;\
        width: 80px;\
        margin-left: calc(-80px - 1ex);\
        display: inline-block;\
        text-align: right"></div>');
    var img = h2.firstChild.appendChild(document.createElement('img'));
    img.style.maxWidth = img.style.maxHeight = '64px';
    img.style.width = img.style.height = 'auto';
    img.src = iconsrc;

    GM_setValue(scriptID, iconsrc);
  }

  function __wait() {
    var ob = new MutationObserver(function(mutations){
      for (var i=0, ml=mutations.length, m; (i<ml) && (m=mutations[i]); i++) {
        if (m.target.localName == 'h2') {
          __add();
          ob.disconnect();
          return;
        }
      }
    });
    ob.observe(document, {subtree:true, childList:true});
  }
}