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// QRCODE reader Copyright 2011 Lazar Laszlo
// http://www.webqr.com
var gCtx = null;
var gCanvas = null;
var c=0;
var stype=0;
var gUM=false;
var webkit=false;
var moz=false;
var v=null;
var imghtml='<div id="qrfile"><canvas id="out-canvas" width="320" height="240"></canvas>'+
'<div id="imghelp">Arrastra y suelta una imagen de codigo QR aqui'+
'<br>o selecciona un archivo'+
'<input type="file" onchange="handleFiles(this.files)"/>'+
'</div>'+
'</div>';
var vidhtml = '<video id="v" autoplay></video>';
function dragenter(e) {
e.stopPropagation();
e.preventDefault();
}
function dragover(e) {
e.stopPropagation();
e.preventDefault();
}
function drop(e) {
e.stopPropagation();
e.preventDefault();
var dt = e.dataTransfer;
var files = dt.files;
if(files.length>0)
{
handleFiles(files);
}
else
if(dt.getData('URL'))
{
qrcode.decode(dt.getData('URL'));
}
}
function handleFiles(f)
{
var o=[];
for(var i =0;i<f.length;i++)
{
var reader = new FileReader();
reader.onload = (function(theFile) {
return function(e) {
gCtx.clearRect(0, 0, gCanvas.width, gCanvas.height);
qrcode.decode(e.target.result);
};
})(f[i]);
reader.readAsDataURL(f[i]);
}
}
function initCanvas(w,h)
{
gCanvas = document.getElementById("qr-canvas");
gCanvas.style.width = w + "px";
gCanvas.style.height = h + "px";
gCanvas.width = w;
gCanvas.height = h;
gCtx = gCanvas.getContext("2d");
gCtx.clearRect(0, 0, w, h);
}
function captureToCanvas() {
if(stype!=1)
return;
if(gUM)
{
try{
gCtx.drawImage(v,0,0);
try{
qrcode.decode();
}
catch(e){
console.log(e);
setTimeout(captureToCanvas, 500);
};
}
catch(e){
console.log(e);
setTimeout(captureToCanvas, 500);
};
}
}
function htmlEntities(str) {
return String(str).replace(/&/g, '&').replace(/</g, '<').replace(/>/g, '>').replace(/"/g, '"');
}
function read(a)
{
var html="<br>";
if(a.indexOf("http://") === 0 || a.indexOf("https://") === 0)
html+="<a target='_blank' href='"+a+"'>"+a+"</a><br>";
html+="<b>"+htmlEntities(a)+"</b><br><br>";
document.getElementById("result").innerHTML=html;
document.getElementById("product_name").value=a.split("-")[1]+"\n";
$("#searchp").submit();
}
function isCanvasSupported(){
var elem = document.createElement('canvas');
return !!(elem.getContext && elem.getContext('2d'));
}
function success(stream) {
if(webkit)
v.src = window.URL.createObjectURL(stream);
else
if(moz)
{
v.mozSrcObject = stream;
v.play();
}
else
v.src = stream;
gUM=true;
setTimeout(captureToCanvas, 500);
}
function error(error) {
gUM=false;
return;
}
function load()
{
if(isCanvasSupported() && window.File && window.FileReader)
{
initCanvas(800, 600);
qrcode.callback = read;
document.getElementById("mainbody").style.display="inline";
setwebcam();
}
else
{
document.getElementById("mainbody").style.display="inline";
document.getElementById("mainbody").innerHTML='<p id="mp1">QR code scanner for HTML5 capable browsers</p><br>'+
'<br><p id="mp2">sorry your browser is not supported</p><br><br>'+
'<p id="mp1">try <a href="http://www.mozilla.com/firefox"><img src="firefox.png"/></a> or <a href="http://chrome.google.com"><img src="chrome_logo.gif"/></a> or <a href="http://www.opera.com"><img src="Opera-logo.png"/></a></p>';
}
}
function setwebcam()
{
var options = true;
if(navigator.mediaDevices && navigator.mediaDevices.enumerateDevices)
{
try{
navigator.mediaDevices.enumerateDevices()
.then(function(devices) {
devices.forEach(function(device) {
if (device.kind === 'videoinput') {
if(device.label.toLowerCase().search("back") >-1)
options={'deviceId': {'exact':device.deviceId}, 'facingMode':'environment'} ;
}
console.log(device.kind + ": " + device.label +" id = " + device.deviceId);
});
setwebcam2(options);
});
}
catch(e)
{
console.log(e);
}
}
else{
console.log("no navigator.mediaDevices.enumerateDevices" );
setwebcam2(options);
}
}
function setwebcam2(options)
{
console.log(options);
document.getElementById("result").innerHTML="- leyendo -";
if(stype==1)
{
setTimeout(captureToCanvas, 500);
return;
}
var n=navigator;
document.getElementById("outdiv").innerHTML = vidhtml;
v=document.getElementById("v");
if(n.getUserMedia)
n.getUserMedia({video: options, audio: false}, success, error);
else
if(n.webkitGetUserMedia)
{
webkit=true;
n.webkitGetUserMedia({video:options, audio: false}, success, error);
}
else
if(n.mozGetUserMedia)
{
moz=true;
n.mozGetUserMedia({video: options, audio: false}, success, error);
}
//document.getElementById("qrimg").src="qrimg2.png";
//document.getElementById("webcamimg").src="webcam.png";
document.getElementById("qrimg").style.opacity=0.2;
document.getElementById("webcamimg").style.opacity=1.0;
stype=1;
setTimeout(captureToCanvas, 500);
}
function setimg()
{
document.getElementById("result").innerHTML="";
if(stype==2)
return;
document.getElementById("outdiv").innerHTML = imghtml;
//document.getElementById("qrimg").src="qrimg.png";
//document.getElementById("webcamimg").src="webcam2.png";
document.getElementById("qrimg").style.opacity=1.0;
document.getElementById("webcamimg").style.opacity=0.2;
var qrfile = document.getElementById("qrfile");
qrfile.addEventListener("dragenter", dragenter, false);
qrfile.addEventListener("dragover", dragover, false);
qrfile.addEventListener("drop", drop, false);
stype=2;
}