plugins/qrcode/shaarli-qrcode.js

   1 // Show the QR-Code of a permalink (when the QR-Code icon is clicked).
   2 function showQrCode(caller,loading)
   3 {
   4     // Dynamic javascript lib loading: We only load qr.js if the QR code icon is clicked:
   5     if (typeof(qr) == 'undefined') // Load qr.js only if not present.
   6     {
   7         if (!loading)  // If javascript lib is still loading, do not append script to body.
   8         {
   9             var element = document.createElement("script");
  10             element.src = "plugins/qrcode/qr-1.1.3.min.js";
  11             document.body.appendChild(element);
  12         }
  13         setTimeout(function() { showQrCode(caller,true);}, 200); // Retry in 200 milliseconds.
  14         return false;
  15     }
  16
  17     // Remove previous qrcode if present.
  18     removeQrcode();
  19
  20     // Build the div which contains the QR-Code:
  21     var element = document.createElement('div');
  22     element.id="permalinkQrcode";
  23
  24         // Make QR-Code div commit sepuku when clicked:
  25     if ( element.attachEvent ){
  26         element.attachEvent('onclick', 'this.parentNode.removeChild(this);' );
  27
  28     } else {
  29         // Damn IE
  30         element.setAttribute('onclick', 'this.parentNode.removeChild(this);' );
  31     }
  32
  33     // Build the QR-Code:
  34     var image = qr.image({size: 8,value: caller.dataset.permalink});
  35     if (image)
  36     {
  37         element.appendChild(image);
  38         element.innerHTML += "<br>Click to close";
  39         caller.parentNode.appendChild(element);
  40     }
  41     else
  42     {
  43         element.innerHTML = "Your browser does not seem to be HTML5 compatible.";
  44     }
  45     return false;
  46 }
  47
  48 // Remove any displayed QR-Code
  49 function removeQrcode()
  50 {
  51     var elem = document.getElementById("permalinkQrcode");
  52     if (elem) {
  53         elem.parentNode.removeChild(elem);
  54     }
  55     return false;
  56 }