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