'use strict';
(function(definition) {
if (typeof define === 'function' && define.amd) {
define(['QRCode'], definition);
} else if (typeof module === 'object' && module.exports) {
var QRCode = require('qrjs');
module.exports = definition(QRCode);
} else {
definition(window.QRCode);
}
})(function(QRCode) {
//
// Prototype
//
var proto = Object.create(HTMLElement.prototype, {
//
// Attributes
//
attrs: {
value: {
data: null,
format: 'png',
modulesize: 5,
margin: 4
}
},
defineAttributes: {
value: function () {
var attrs = Object.keys(this.attrs),
attr;
for (var i=0; i<attrs.length; i++) {
attr = attrs[i];
(function (attr) {
Object.defineProperty(this, attr, {
get: function () {
var value = this.getAttribute(attr);
return value === null ? this.attrs[attr] : value;
},
set: function (value) {
this.setAttribute(attr, value);
}
});
}.bind(this))(attr);
}
}
},
//
// LifeCycle Callbacks
//
createdCallback: {
value: function () {
this.createShadowRoot();
this.defineAttributes();
this.generate();
}
},
attributeChangedCallback: {
value: function (attrName, oldVal, newVal) {
var fn = this[attrName+'Changed'];
if (fn && typeof fn === 'function') {
fn.call(this, oldVal, newVal);
}
this.generate();
}
},
//
// Methods
//
getOptions: {
value: function () {
var modulesize = this.modulesize,
margin = this.margin;
return {
modulesize: modulesize !== null ? parseInt(modulesize) : modulesize,
margin: margin !== null ? parseInt(margin) : margin
};
}
},
generate: {
value: function () {
if (this.data !== null) {
if (this.format === 'png') {
this.generatePNG();
}
else if (this.format === 'html') {
this.generateHTML();
}
else if (this.format === 'svg') {
this.generateSVG();
}
else {
this.shadowRoot.innerHTML = '<div>qr-code: '+ this.format +' not supported!</div>'
}
}
else {
this.shadowRoot.innerHTML = '<div>qr-code: no data!</div>'
}
}
},
generatePNG: {
value: function () {
try {
var img = document.createElement('img');
img.src = QRCode.generatePNG(this.data, this.getOptions());
this.clear();
this.shadowRoot.appendChild(img);
}
catch (e) {
this.shadowRoot.innerHTML = '<div>qr-code: no canvas support!</div>'
}
}
},
generateHTML: {
value: function () {
var div = QRCode.generateHTML(this.data, this.getOptions());
this.clear();
this.shadowRoot.appendChild(div);
}
},
generateSVG: {
value: function () {
var div = QRCode.generateSVG(this.data, this.getOptions());
this.clear();
this.shadowRoot.appendChild(div);
}
},
clear: {
value: function () {
while (this.shadowRoot.lastChild) {
this.shadowRoot.removeChild(this.shadowRoot.lastChild);
}
}
}
});
//
// Register
//
document.registerElement('qr-code', {
prototype: proto
});
});