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Slideshare Downloader

Slideshare Slide Downloader (images)

  1. // ==UserScript==
  2. // @name         Slideshare Downloader
  3. // @namespace    Slideshare Slide Downloader
  4. // @version      0.4
  5. // @description  Slideshare Slide Downloader (images)
  6. // @author       Hosamn Based on DownloadBoxy By QQBoxy
  7. // @match        https://www.slideshare.net/*
  8. // @grant        none
  9. // ==/UserScript==
  10.  
  11. function getHighestResImg(element) {
  12.   if (element.getAttribute("srcset")) {
  13.     return element
  14.       .getAttribute("srcset")
  15.       .split(",")
  16.       .reduce(
  17.         (acc, item) => {
  18.           let [url, width] = item.trim().split(" ");
  19.           width = parseInt(width);
  20.           if (width > acc.width) return { width, url };
  21.           return acc;
  22.         },
  23.         { width: 0, url: "" }
  24.       ).url;
  25.   }
  26.  
  27.   return element.getAttribute("src");
  28. }
  29.  
  30.  
  31. function slideshareboxy() {
  32.     var e = document.getElementById('slide-container').getElementsByTagName('source');
  33.     var o = "";
  34.     var a ;
  35.     for(var key=0; key<e.length; key+=1) {
  36.         if(e[key].attributes.srcset) {
  37.             var url = getHighestResImg(e[key])
  38.             a = document.createElement("a");
  39.             a.target = url;
  40.             a.href = url;
  41.             a.download = key;
  42.             a.click();
  43.             // let picBlob = new Blob(url, {type: 'text/html'});
  44.             // tar??.gz
  45.             // https://stackoverflow.com/questions/49736214/force-a-download-to-download-image-instead-of-opening-url-link-to-image
  46.         }
  47.     }
  48. }
  49.  
  50. function downloadboxy() {
  51.     var btn = document.createElement("button");
  52.     btn.onclick = function() {
  53.         slideshareboxy();
  54.     };
  55.  
  56.     btn.innerHTML = ">> Download Images <<";
  57.     btn.style.textDecoration = "underline"
  58.     document.getElementsByClassName('player-toolbar-item')[0].appendChild(btn);
  59. }
  60.  
  61.  
  62.  
  63. function waitForElementToDisplay(selector, callback, checkFrequencyInMs, timeoutInMs) {
  64.   var startTimeInMs = Date.now();
  65.   (function loopSearch() {
  66.     if (document.querySelector(selector) != null) {
  67.       callback();
  68.       return;
  69.     }
  70.     else {
  71.       setTimeout(function () {
  72.         if (timeoutInMs && Date.now() - startTimeInMs > timeoutInMs) {
  73.           return;
  74.         loopSearch();
  75.         }
  76.       }, checkFrequencyInMs);
  77.     }
  78.   })();
  79. }
  80.  
  81.  
  82. waitForElementToDisplay("#player-toolbar", downloadboxy, 100,10000);
  83.