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// Show the QR-Code of a permalink (when the QR-Code icon is clicked).
function showQrCode(caller,loading)
{
// Dynamic javascript lib loading: We only load qr.js if the QR code icon is clicked:
if (typeof(qr) == 'undefined') // Load qr.js only if not present.
{
if (!loading) // If javascript lib is still loading, do not append script to body.
{
var element = document.createElement("script");
element.src = "plugins/qrcode/qr-1.1.3.min.js";
document.body.appendChild(element);
}
setTimeout(function() { showQrCode(caller,true);}, 200); // Retry in 200 milliseconds.
return false;
}
// Remove previous qrcode if present.
removeQrcode();
// Build the div which contains the QR-Code:
var element = document.createElement('div');
element.id = 'permalinkQrcode';
// Make QR-Code div commit sepuku when clicked:
if ( element.attachEvent ){
element.attachEvent('onclick', 'this.parentNode.removeChild(this);' );
} else {
// Damn IE
element.setAttribute('onclick', 'this.parentNode.removeChild(this);' );
}
// Build the QR-Code:
var image = qr.image({size: 8,value: caller.dataset.permalink});
if (image)
{
element.appendChild(image);
element.innerHTML += "<br>Click to close";
caller.parentNode.appendChild(element);
// Show the QRCode
qrcodeImage = document.getElementById('permalinkQrcode');
// Workaround to deal with newly created element lag for transition.
window.getComputedStyle(qrcodeImage).opacity;
qrcodeImage.className = 'show';
}
else
{
element.innerHTML = "Your browser does not seem to be HTML5 compatible.";
}
return false;
}
// Remove any displayed QR-Code
function removeQrcode()
{
var elem = document.getElementById('permalinkQrcode');
if (elem) {
elem.parentNode.removeChild(elem);
}
return false;
}
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