text: /*
   * QR Code generator demo (JavaScript)
   *
   * Copyright (c) Project Nayuki. (MIT License)
   * https://www.nayuki.io/page/qr-code-generator-library
   *
   * Permission is hereby granted, free of charge, to any person obtaining a copy of
   * this software and associated documentation files (the "Software"), to deal in
   * the Software without restriction, including without limitation the rights to
   * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
   * the Software, and to permit persons to whom the Software is furnished to do so,
   * subject to the following conditions:
   * - The above copyright notice and this permission notice shall be included in
   *   all copies or substantial portions of the Software.
   * - The Software is provided "as is", without warranty of any kind, express or
   *   implied, including but not limited to the warranties of merchantability,
   *   fitness for a particular purpose and noninfringement. In no event shall the
   *   authors or copyright holders be liable for any claim, damages or other
   *   liability, whether in an action of contract, tort or otherwise, arising from,
   *   out of or in connection with the Software or the use or other dealings in the
   *   Software.
   */
  
  "use strict";
  
  
  var app = new function() {
  
  	function initialize() {
  		var elems = document.querySelectorAll("input[type=number], textarea");
  		for (var i = 0; i < elems.length; i++) {
  			if (elems[i].id.indexOf("version-") != 0)
  				elems[i].oninput = redrawQrCode;
  		}
  		elems = document.querySelectorAll("input[type=radio], input[type=checkbox]");
  		for (var i = 0; i < elems.length; i++)
  			elems[i].onchange = redrawQrCode;
  		redrawQrCode();
  	}
  
  
  	function redrawQrCode() {
  		// Show/hide rows based on bitmap/vector image output
  		var bitmapOutput = document.getElementById("output-format-bitmap").checked;
  		var scaleRow = document.getElementById("scale-row");
  		var svgXmlRow = document.getElementById("svg-xml-row");
  		if (bitmapOutput) {
  			scaleRow.style.removeProperty("display");
  			svgXmlRow.style.display = "none";
  		} else {
  			scaleRow.style.display = "none";
  			svgXmlRow.style.removeProperty("display");
  		}
  		var svgXml = document.getElementById("svg-xml-output");
  		svgXml.value = "";
  
  		// Reset output images in case of early termination
  		var canvas = document.getElementById("qrcode-canvas");
  		var svg = document.getElementById("qrcode-svg");
  		canvas.style.display = "none";
  		svg.style.display = "none";
  
  		// Returns a QrCode.Ecc object based on the radio buttons in the HTML form.
  		function getInputErrorCorrectionLevel() {
  			if (document.getElementById("errcorlvl-medium").checked)
  				return qrcodegen.QrCode.Ecc.MEDIUM;
  			else if (document.getElementById("errcorlvl-quartile").checked)
  				return qrcodegen.QrCode.Ecc.QUARTILE;
  			else if (document.getElementById("errcorlvl-high").checked)
  				return qrcodegen.QrCode.Ecc.HIGH;
  			else  // In case no radio button is depressed
  				return qrcodegen.QrCode.Ecc.LOW;
  		}
  
  		// Get form inputs and compute QR Code
  		var ecl = getInputErrorCorrectionLevel();
  		var text = document.getElementById("text-input").value;
  		var segs = qrcodegen.QrSegment.makeSegments(text);
  		var minVer = parseInt(document.getElementById("version-min-input").value, 10);
  		var maxVer = parseInt(document.getElementById("version-max-input").value, 10);
  		var mask = parseInt(document.getElementById("mask-input").value, 10);
  		var boostEcc = document.getElementById("boost-ecc-input").checked;
  		var qr = qrcodegen.QrCode.encodeSegments(segs, ecl, minVer, maxVer, mask, boostEcc);
  
  		// Draw image output
  		var border = parseInt(document.getElementById("border-input").value, 10);
  		if (border < 0 || border > 100)
  			return;
  		if (bitmapOutput) {
  			var scale = parseInt(document.getElementById("scale-input").value, 10);
  			if (scale <= 0 || scale > 30)
  				return;
  			qr.drawCanvas(scale, border, canvas);
  			canvas.style.removeProperty("display");
  		} else {
  			var code = qr.toSvgString(border);
  			svg.setAttribute("viewBox", / viewBox="([^"]*)"/.exec(code)[1]);
  			svg.querySelector("path").setAttribute("d", / d="([^"]*)"/.exec(code)[1]);
  			svg.style.removeProperty("display");
  			svgXml.value = qr.toSvgString(border);
  		}
  
  		// Returns a string to describe the given list of segments.
  		function describeSegments(segs) {
  			if (segs.length == 0)
  				return "none";
  			else if (segs.length == 1) {
  				var mode = segs[0].mode;
  				var Mode = qrcodegen.QrSegment.Mode;
  				if (mode == Mode.NUMERIC     )  return "numeric";
  				if (mode == Mode.ALPHANUMERIC)  return "alphanumeric";
  				if (mode == Mode.BYTE        )  return "byte";
  				if (mode == Mode.KANJI       )  return "kanji";
  				return "unknown";
  			} else
  				return "multiple";
  		}
  
  		// Returns the number of Unicode code points in the given UTF-16 string.
  		function countUnicodeChars(str) {
  			var result = 0;
  			for (var i = 0; i < str.length; i++, result++) {
  				var c = str.charCodeAt(i);
  				if (c < 0xD800 || c >= 0xE000)
  					continue;
  				else if (0xD800 <= c && c < 0xDC00 && i + 1 < str.length) {  // High surrogate
  					i++;
  					var d = str.charCodeAt(i);
  					if (0xDC00 <= d && d < 0xE000)  // Low surrogate
  						continue;
  				}
  				throw "Invalid UTF-16 string";
  			}
  			return result;
  		}
  
  		// Show the QR Code symbol's statistics as a string
  		var stats = "QR Code version = " + qr.version + ", ";
  		stats += "mask pattern = " + qr.mask + ", ";
  		stats += "character count = " + countUnicodeChars(text) + ",\n";
  		stats += "encoding mode = " + describeSegments(segs) + ", ";
  		stats += "error correction = level " + "LMQH".charAt(qr.errorCorrectionLevel.ordinal) + ", ";
  		stats += "data bits = " + qrcodegen.QrSegment.getTotalBits(segs, qr.version) + ".";
  		document.getElementById("statistics-output").textContent = stats;
  	}
  
  
  	this.handleVersionMinMax = function(which) {
  		var minElem = document.getElementById("version-min-input");
  		var maxElem = document.getElementById("version-max-input");
  		var minVal = parseInt(minElem.value, 10);
  		var maxVal = parseInt(maxElem.value, 10);
  		minVal = Math.max(Math.min(minVal, qrcodegen.QrCode.MAX_VERSION), qrcodegen.QrCode.MIN_VERSION);
  		maxVal = Math.max(Math.min(maxVal, qrcodegen.QrCode.MAX_VERSION), qrcodegen.QrCode.MIN_VERSION);
  		if (which == "min" && minVal > maxVal)
  			maxVal = minVal;
  		else if (which == "max" && maxVal < minVal)
  			minVal = maxVal;
  		minElem.value = minVal.toString();
  		maxElem.value = maxVal.toString();
  		redrawQrCode();
  	}
  
  
  	initialize();
  }
  