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PuciekTM / Floating youtube player

// ==UserScript==
// @name         Floating youtube player
// @namespace    https://www.youtube.com/
// @version      1.0
// @license      MIT
// @description  Make youtube player float
// @author       pcktm
// @icon         https://youtube.com/favicon.ico
// @match        https://www.youtube.com/watch?v=*
// @grant        none
// @require      https://code.jquery.com/jquery-3.3.1.slim.min.js
// ==/UserScript==

(function () {
  'use strict';
  console.log('Floating youtube init');
})();

let state = {
  bool: 1
};
let element = $('video')

$(window).scroll(function () {
  if ($('.title').visible()) {
    if (state.bool == 0) {
      element.attr('style', state.initStyle);
      state.bool = 1;
    }
  }
  else {
    if (state.bool == 1) {
      state.initStyle = element.attr("style")
      var size = {
        width: state.initStyle.split(';')[0].split(' ')[1].slice(0, -2),
        height: state.initStyle.split(';')[1].split(' ')[2].slice(0, -2)
      }
      size.calc = calculateAspectRatioFit(size.width, size.height, $(window).width() / 3, $(window).width() / 3)
      element.attr('style', '');
      element.css({
        'position': 'fixed',
        'left': $(window).width() - $(window).width() / 30 - size.calc.width + 'px',
        'top': $(window).height() - $(window).height() / 30 - size.calc.height + 'px',
        'width': size.calc.width,
        'height': size.calc.height
      })
      state.bool = 0;
    }
  }
})

function calculateAspectRatioFit(srcWidth, srcHeight, maxWidth, maxHeight) {
  var ratio = Math.min(maxWidth / srcWidth, maxHeight / srcHeight);
  return {
    width: srcWidth * ratio,
    height: srcHeight * ratio
  };
}

//EXTERNAL JQUERY PLUGIN THAT GREASESCRIPT DIDN'T LET ME LOAD (JQUERY VISIBLE)
! function (t) {
  var i = t(window);
  t.fn.visible = function (t, e, o) {
    if (!(this.length < 1)) {
      var r = this.length > 1 ? this.eq(0) : this,
        n = r.get(0),
        f = i.width(),
        h = i.height(),
        o = o ? o : "both",
        l = e === !0 ? n.offsetWidth * n.offsetHeight : !0;
      if ("function" == typeof n.getBoundingClientRect) {
        var g = n.getBoundingClientRect(),
          u = g.top >= 0 && g.top < h,
          s = g.bottom > 0 && g.bottom <= h,
          c = g.left >= 0 && g.left < f,
          a = g.right > 0 && g.right <= f,
          v = t ? u || s : u && s,
          b = t ? c || a : c && a;
        if ("both" === o) return l && v && b;
        if ("vertical" === o) return l && v;
        if ("horizontal" === o) return l && b
      }
      else {
        var d = i.scrollTop(),
          p = d + h,
          w = i.scrollLeft(),
          m = w + f,
          y = r.offset(),
          z = y.top,
          B = z + r.height(),
          C = y.left,
          R = C + r.width(),
          j = t === !0 ? B : z,
          q = t === !0 ? z : B,
          H = t === !0 ? R : C,
          L = t === !0 ? C : R;
        if ("both" === o) return !!l && p >= q && j >= d && m >= L && H >= w;
        if ("vertical" === o) return !!l && p >= q && j >= d;
        if ("horizontal" === o) return !!l && m >= L && H >= w
      }
    }
  }
}(jQuery);