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91 | /*
* LetterAvatar
*
* Artur Heinze
* Create Letter avatar based on Initials
* based on https://gist.github.com/leecrossley/6027780
*/
(function(w, d){
function LetterAvatar (name, size) {
name = name || '';
size = size || 60;
var colours = [
"#1abc9c", "#2ecc71", "#3498db", "#9b59b6", "#34495e", "#16a085", "#27ae60", "#2980b9", "#8e44ad", "#2c3e50",
"#f1c40f", "#e67e22", "#e74c3c", "#ecf0f1", "#95a5a6", "#f39c12", "#d35400", "#c0392b", "#bdc3c7", "#7f8c8d"
],
nameSplit = String(name).toUpperCase().split(' '),
initials, charIndex, colourIndex, canvas, context, dataURI;
if (nameSplit.length == 1) {
initials = nameSplit[0] ? nameSplit[0].charAt(0):'?';
} else {
initials = nameSplit[0].charAt(0) + nameSplit[1].charAt(0);
}
if (w.devicePixelRatio) {
size = (size * w.devicePixelRatio);
}
charIndex = (initials == '?' ? 72 : initials.charCodeAt(0)) - 64;
colourIndex = charIndex % 20;
canvas = d.createElement('canvas');
canvas.width = size;
canvas.height = size;
context = canvas.getContext("2d");
context.fillStyle = colours[colourIndex - 1];
context.fillRect (0, 0, canvas.width, canvas.height);
context.font = Math.round(canvas.width/2)+"px Arial";
context.textAlign = "center";
context.fillStyle = "#FFF";
context.fillText(initials, size / 2, size / 1.5);
dataURI = canvas.toDataURL();
canvas = null;
return dataURI;
}
LetterAvatar.transform = function() {
Array.prototype.forEach.call(d.querySelectorAll('img[avatar]'), function(img, name) {
name = img.getAttribute('avatar');
img.src = LetterAvatar(name, img.getAttribute('width'));
img.removeAttribute('avatar');
img.setAttribute('alt', name);
});
};
// AMD support
if (typeof define === 'function' && define.amd) {
define(function () { return LetterAvatar; });
// CommonJS and Node.js module support.
} else if (typeof exports !== 'undefined') {
// Support Node.js specific `module.exports` (which can be a function)
if (typeof module != 'undefined' && module.exports) {
exports = module.exports = LetterAvatar;
}
// But always support CommonJS module 1.1.1 spec (`exports` cannot be a function)
exports.LetterAvatar = LetterAvatar;
} else {
window.LetterAvatar = LetterAvatar;
d.addEventListener('DOMContentLoaded', function(event) {
LetterAvatar.transform();
});
}
})(window, document);
|
