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/*!
* WebCodeCamJS 2.1.0 javascript Bar code and QR code decoder
* Author: Tóth András
* Web: http://atandrastoth.co.uk
* email: atandrastoth@gmail.com
* Licensed under the MIT license
*/
(function(undefined) {
"use strict";
function Q(el) {
if (typeof el === "string") {
var els = document.querySelectorAll(el);
return typeof els === "undefined" ? undefined : els.length > 1 ? els : els[0];
}
return el;
}
var txt = "innerText" in HTMLElement.prototype ? "innerText" : "textContent";
var scannerLaser = Q(".scanner-laser"),
imageUrl = new Q("#image-url"),
play = Q("#play"),
scannedImg = Q("#scanned-img"),
scannedQR = Q("#scanned-QR"),
grabImg = Q("#grab-img"),
decodeLocal = Q("#decode-img"),
pause = Q("#pause"),
stop = Q("#stop"),
contrast = Q("#contrast"),
contrastValue = Q("#contrast-value"),
zoom = Q("#zoom"),
zoomValue = Q("#zoom-value"),
brightness = Q("#brightness"),
brightnessValue = Q("#brightness-value"),
threshold = Q("#threshold"),
thresholdValue = Q("#threshold-value"),
sharpness = Q("#sharpness"),
sharpnessValue = Q("#sharpness-value"),
grayscale = Q("#grayscale"),
grayscaleValue = Q("#grayscale-value"),
flipVertical = Q("#flipVertical"),
flipVerticalValue = Q("#flipVertical-value"),
flipHorizontal = Q("#flipHorizontal"),
flipHorizontalValue = Q("#flipHorizontal-value");
var args = {
autoBrightnessValue: 100,
resultFunction: function(res) {
[].forEach.call(scannerLaser, function(el) {
fadeOut(el, 0.5);
setTimeout(function() {
fadeIn(el, 0.5);
}, 300);
});
scannedImg.src = res.imgData;
scannedQR[txt] = res.format + ": " + res.code;
},
getDevicesError: function(error) {
var p, message = "Error detected with the following parameters:\n";
for (p in error) {
message += p + ": " + error[p] + "\n";
}
alert(message);
},
getUserMediaError: function(error) {
var p, message = "Error detected with the following parameters:\n";
for (p in error) {
message += p + ": " + error[p] + "\n";
}
alert(message);
},
cameraError: function(error) {
var p, message = "Error detected with the following parameters:\n";
if (error.name == "NotSupportedError") {
var ans = confirm("Your browser does not support getUserMedia via HTTP!\n(see: https:goo.gl/Y0ZkNV).\n You want to see github demo page in a new window?");
if (ans) {
window.open("https://andrastoth.github.io/webcodecamjs/");
}
} else {
for (p in error) {
message += p + ": " + error[p] + "\n";
}
alert(message);
}
},
cameraSuccess: function() {
grabImg.classList.remove("disabled");
}
};
var decoder = new WebCodeCamJS("#webcodecam-canvas").buildSelectMenu("#camera-select", "environment|back").init(args);
decodeLocal.addEventListener("click", function() {
Page.decodeLocalImage();
}, false);
play.addEventListener("click", function() {
if (!decoder.isInitialized()) {
scannedQR[txt] = "Scanning ...";
} else {
scannedQR[txt] = "Scanning ...";
decoder.play();
}
}, false);
grabImg.addEventListener("click", function() {
if (!decoder.isInitialized()) {
return;
}
var src = decoder.getLastImageSrc();
scannedImg.setAttribute("src", src);
}, false);
pause.addEventListener("click", function(event) {
scannedQR[txt] = "Paused";
decoder.pause();
}, false);
stop.addEventListener("click", function(event) {
grabImg.classList.add("disabled");
scannedQR[txt] = "Stopped";
decoder.stop();
}, false);
Page.changeZoom = function(a) {
if (decoder.isInitialized()) {
var value = typeof a !== "undefined" ? parseFloat(a.toPrecision(2)) : zoom.value / 10;
zoomValue[txt] = zoomValue[txt].split(":")[0] + ": " + value.toString();
decoder.options.zoom = value;
if (typeof a != "undefined") {
zoom.value = a * 10;
}
}
};
Page.changeContrast = function() {
if (decoder.isInitialized()) {
var value = contrast.value;
contrastValue[txt] = contrastValue[txt].split(":")[0] + ": " + value.toString();
decoder.options.contrast = parseFloat(value);
}
};
Page.changeBrightness = function() {
if (decoder.isInitialized()) {
var value = brightness.value;
brightnessValue[txt] = brightnessValue[txt].split(":")[0] + ": " + value.toString();
decoder.options.brightness = parseFloat(value);
}
};
Page.changeThreshold = function() {
if (decoder.isInitialized()) {
var value = threshold.value;
thresholdValue[txt] = thresholdValue[txt].split(":")[0] + ": " + value.toString();
decoder.options.threshold = parseFloat(value);
}
};
Page.changeSharpness = function() {
if (decoder.isInitialized()) {
var value = sharpness.checked;
if (value) {
sharpnessValue[txt] = sharpnessValue[txt].split(":")[0] + ": on";
decoder.options.sharpness = [0, -1, 0, -1, 5, -1, 0, -1, 0];
} else {
sharpnessValue[txt] = sharpnessValue[txt].split(":")[0] + ": off";
decoder.options.sharpness = [];
}
}
};
Page.changeVertical = function() {
if (decoder.isInitialized()) {
var value = flipVertical.checked;
if (value) {
flipVerticalValue[txt] = flipVerticalValue[txt].split(":")[0] + ": on";
decoder.options.flipVertical = value;
} else {
flipVerticalValue[txt] = flipVerticalValue[txt].split(":")[0] + ": off";
decoder.options.flipVertical = value;
}
}
};
Page.changeHorizontal = function() {
if (decoder.isInitialized()) {
var value = flipHorizontal.checked;
if (value) {
flipHorizontalValue[txt] = flipHorizontalValue[txt].split(":")[0] + ": on";
decoder.options.flipHorizontal = value;
} else {
flipHorizontalValue[txt] = flipHorizontalValue[txt].split(":")[0] + ": off";
decoder.options.flipHorizontal = value;
}
}
};
Page.changeGrayscale = function() {
if (decoder.isInitialized()) {
var value = grayscale.checked;
if (value) {
grayscaleValue[txt] = grayscaleValue[txt].split(":")[0] + ": on";
decoder.options.grayScale = true;
} else {
grayscaleValue[txt] = grayscaleValue[txt].split(":")[0] + ": off";
decoder.options.grayScale = false;
}
}
};
Page.decodeLocalImage = function() {
if (decoder.isInitialized()) {
decoder.decodeLocalImage(imageUrl.value);
}
imageUrl.value = null;
};
var getZomm = setInterval(function() {
var a;
try {
a = decoder.getOptimalZoom();
} catch (e) {
a = 0;
}
if (!!a && a !== 0) {
Page.changeZoom(a);
clearInterval(getZomm);
}
}, 500);
function fadeOut(el, v) {
el.style.opacity = 1;
(function fade() {
if ((el.style.opacity -= 0.1) < v) {
el.style.display = "none";
el.classList.add("is-hidden");
} else {
requestAnimationFrame(fade);
}
})();
}
function fadeIn(el, v, display) {
if (el.classList.contains("is-hidden")) {
el.classList.remove("is-hidden");
}
el.style.opacity = 0;
el.style.display = display || "block";
(function fade() {
var val = parseFloat(el.style.opacity);
if (!((val += 0.1) > v)) {
el.style.opacity = val;
requestAnimationFrame(fade);
}
})();
}
document.querySelector("#camera-select").addEventListener("change", function() {
if (decoder.isInitialized()) {
decoder.stop().play();
}
});
}).call(window.Page = window.Page || {});