File: /var/www/design.system/node_modules/@rc-component/qrcode/lib/libs/qrcodegen.js
"use strict";
var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault").default;
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.QrSegment = exports.QrCode = exports.Mode = exports.Ecc = void 0;
var _createForOfIteratorHelper2 = _interopRequireDefault(require("@babel/runtime/helpers/createForOfIteratorHelper"));
var _classCallCheck2 = _interopRequireDefault(require("@babel/runtime/helpers/classCallCheck"));
var _createClass2 = _interopRequireDefault(require("@babel/runtime/helpers/createClass"));
var _defineProperty2 = _interopRequireDefault(require("@babel/runtime/helpers/defineProperty"));
var _class, _class2;
// Copyright (c) Project Nayuki. (MIT License)
// https://www.nayuki.io/page/qr-code-generator-library
// Modification with code reorder and prettier
// --------------------------------------------
// Appends the given number of low-order bits of the given value
// to the given buffer. Requires 0 <= len <= 31 and 0 <= val < 2^len.
function appendBits(val, len, bb) {
if (len < 0 || len > 31 || val >>> len != 0) throw new RangeError('Value out of range');
for (var i = len - 1; i >= 0; i-- // Append bit by bit
) bb.push(val >>> i & 1);
}
// Returns true iff the i'th bit of x is set to 1.
function getBit(x, i) {
return (x >>> i & 1) != 0;
}
// Throws an exception if the given condition is false.
function assert(cond) {
if (!cond) throw new Error('Assertion error');
}
/*---- Public helper enumeration ----*/
/*
* Describes how a segment's data bits are numbererpreted. Immutable.
*/
var Mode = exports.Mode = /*#__PURE__*/function () {
function Mode(modeBits, numBitsCharCount) {
(0, _classCallCheck2.default)(this, Mode);
/*-- Constructor and fields --*/
// The mode indicator bits, which is a unumber4 value (range 0 to 15).
(0, _defineProperty2.default)(this, "modeBits", void 0);
// Number of character count bits for three different version ranges.
(0, _defineProperty2.default)(this, "numBitsCharCount", void 0);
this.modeBits = modeBits;
this.numBitsCharCount = numBitsCharCount;
}
/*-- Method --*/
// (Package-private) Returns the bit width of the character count field for a segment in
// this mode in a QR Code at the given version number. The result is in the range [0, 16].
(0, _createClass2.default)(Mode, [{
key: "numCharCountBits",
value: function numCharCountBits(ver) {
return this.numBitsCharCount[Math.floor((ver + 7) / 17)];
}
}]);
return Mode;
}();
/*---- Public helper enumeration ----*/
/*
* The error correction level in a QR Code symbol. Immutable.
*/
_class = Mode;
/*-- Constants --*/
(0, _defineProperty2.default)(Mode, "NUMERIC", new _class(0x1, [10, 12, 14]));
(0, _defineProperty2.default)(Mode, "ALPHANUMERIC", new _class(0x2, [9, 11, 13]));
(0, _defineProperty2.default)(Mode, "BYTE", new _class(0x4, [8, 16, 16]));
(0, _defineProperty2.default)(Mode, "KANJI", new _class(0x8, [8, 10, 12]));
(0, _defineProperty2.default)(Mode, "ECI", new _class(0x7, [0, 0, 0]));
var Ecc = exports.Ecc = /*#__PURE__*/(0, _createClass2.default)(function Ecc(ordinal, formatBits) {
(0, _classCallCheck2.default)(this, Ecc);
// The QR Code can tolerate about 30% erroneous codewords
/*-- Constructor and fields --*/
// In the range 0 to 3 (unsigned 2-bit numbereger).
(0, _defineProperty2.default)(this, "ordinal", void 0);
// (Package-private) In the range 0 to 3 (unsigned 2-bit numbereger).
(0, _defineProperty2.default)(this, "formatBits", void 0);
this.ordinal = ordinal;
this.formatBits = formatBits;
});
/*
* A segment of character/binary/control data in a QR Code symbol.
* Instances of this class are immutable.
* The mid-level way to create a segment is to take the payload data
* and call a static factory function such as QrSegment.makeNumeric().
* The low-level way to create a segment is to custom-make the bit buffer
* and call the QrSegment() constructor with appropriate values.
* This segment class imposes no length restrictions, but QR Codes have restrictions.
* Even in the most favorable conditions, a QR Code can only hold 7089 characters of data.
* Any segment longer than this is meaningless for the purpose of generating QR Codes.
*/
_class2 = Ecc;
/*-- Constants --*/
(0, _defineProperty2.default)(Ecc, "LOW", new _class2(0, 1));
// The QR Code can tolerate about 7% erroneous codewords
(0, _defineProperty2.default)(Ecc, "MEDIUM", new _class2(1, 0));
// The QR Code can tolerate about 15% erroneous codewords
(0, _defineProperty2.default)(Ecc, "QUARTILE", new _class2(2, 3));
// The QR Code can tolerate about 25% erroneous codewords
(0, _defineProperty2.default)(Ecc, "HIGH", new _class2(3, 2));
var QrSegment = exports.QrSegment = /*#__PURE__*/function () {
// Creates a new QR Code segment with the given attributes and data.
// The character count (numChars) must agree with the mode and the bit buffer length,
// but the constranumber isn't checked. The given bit buffer is cloned and stored.
function QrSegment(mode, numChars, bitData) {
(0, _classCallCheck2.default)(this, QrSegment);
/*-- Constructor (low level) and fields --*/
// The mode indicator of this segment.
(0, _defineProperty2.default)(this, "mode", void 0);
// The length of this segment's unencoded data. Measured in characters for
// numeric/alphanumeric/kanji mode, bytes for byte mode, and 0 for ECI mode.
// Always zero or positive. Not the same as the data's bit length.
(0, _defineProperty2.default)(this, "numChars", void 0);
// The data bits of this segment. Accessed through getData().
(0, _defineProperty2.default)(this, "bitData", void 0);
this.mode = mode;
this.numChars = numChars;
this.bitData = bitData;
if (numChars < 0) throw new RangeError('Invalid argument');
this.bitData = bitData.slice(); // Make defensive copy
}
/*-- Methods --*/
// Returns a new copy of the data bits of this segment.
(0, _createClass2.default)(QrSegment, [{
key: "getData",
value: function getData() {
return this.bitData.slice(); // Make defensive copy
}
// (Package-private) Calculates and returns the number of bits needed to encode the given segments at
// the given version. The result is infinity if a segment has too many characters to fit its length field.
}], [{
key: "makeBytes",
value: /*-- Static factory functions (mid level) --*/
// Returns a segment representing the given binary data encoded in
// byte mode. All input byte arrays are acceptable. Any text string
// can be converted to UTF-8 bytes and encoded as a byte mode segment.
function makeBytes(data) {
var bb = [];
var _iterator = (0, _createForOfIteratorHelper2.default)(data),
_step;
try {
for (_iterator.s(); !(_step = _iterator.n()).done;) {
var b = _step.value;
appendBits(b, 8, bb);
}
} catch (err) {
_iterator.e(err);
} finally {
_iterator.f();
}
return new QrSegment(Mode.BYTE, data.length, bb);
}
// Returns a segment representing the given string of decimal digits encoded in numeric mode.
}, {
key: "makeNumeric",
value: function makeNumeric(digits) {
if (!QrSegment.isNumeric(digits)) throw new RangeError('String contains non-numeric characters');
var bb = [];
for (var i = 0; i < digits.length;) {
// Consume up to 3 digits per iteration
var n = Math.min(digits.length - i, 3);
appendBits(parseInt(digits.substring(i, i + n), 10), n * 3 + 1, bb);
i += n;
}
return new QrSegment(Mode.NUMERIC, digits.length, bb);
}
// Returns a segment representing the given text string encoded in alphanumeric mode.
// The characters allowed are: 0 to 9, A to Z (uppercase only), space,
// dollar, percent, asterisk, plus, hyphen, period, slash, colon.
}, {
key: "makeAlphanumeric",
value: function makeAlphanumeric(text) {
if (!QrSegment.isAlphanumeric(text)) throw new RangeError('String contains unencodable characters in alphanumeric mode');
var bb = [];
var i;
for (i = 0; i + 2 <= text.length; i += 2) {
// Process groups of 2
var temp = QrSegment.ALPHANUMERIC_CHARSET.indexOf(text.charAt(i)) * 45;
temp += QrSegment.ALPHANUMERIC_CHARSET.indexOf(text.charAt(i + 1));
appendBits(temp, 11, bb);
}
if (i < text.length)
// 1 character remaining
appendBits(QrSegment.ALPHANUMERIC_CHARSET.indexOf(text.charAt(i)), 6, bb);
return new QrSegment(Mode.ALPHANUMERIC, text.length, bb);
}
// Returns a new mutable list of zero or more segments to represent the given Unicode text string.
// The result may use various segment modes and switch modes to optimize the length of the bit stream.
}, {
key: "makeSegments",
value: function makeSegments(text) {
// Select the most efficient segment encoding automatically
if (text == '') return [];else if (QrSegment.isNumeric(text)) return [QrSegment.makeNumeric(text)];else if (QrSegment.isAlphanumeric(text)) return [QrSegment.makeAlphanumeric(text)];else return [QrSegment.makeBytes(QrSegment.toUtf8ByteArray(text))];
}
// Returns a segment representing an Extended Channel Interpretation
// (ECI) designator with the given assignment value.
}, {
key: "makeEci",
value: function makeEci(assignVal) {
var bb = [];
if (assignVal < 0) throw new RangeError('ECI assignment value out of range');else if (assignVal < 1 << 7) appendBits(assignVal, 8, bb);else if (assignVal < 1 << 14) {
appendBits(2, 2, bb);
appendBits(assignVal, 14, bb);
} else if (assignVal < 1000000) {
appendBits(6, 3, bb);
appendBits(assignVal, 21, bb);
} else throw new RangeError('ECI assignment value out of range');
return new QrSegment(Mode.ECI, 0, bb);
}
// Tests whether the given string can be encoded as a segment in numeric mode.
// A string is encodable iff each character is in the range 0 to 9.
}, {
key: "isNumeric",
value: function isNumeric(text) {
return QrSegment.NUMERIC_REGEX.test(text);
}
// Tests whether the given string can be encoded as a segment in alphanumeric mode.
// A string is encodable iff each character is in the following set: 0 to 9, A to Z
// (uppercase only), space, dollar, percent, asterisk, plus, hyphen, period, slash, colon.
}, {
key: "isAlphanumeric",
value: function isAlphanumeric(text) {
return QrSegment.ALPHANUMERIC_REGEX.test(text);
}
}, {
key: "getTotalBits",
value: function getTotalBits(segs, version) {
var result = 0;
var _iterator2 = (0, _createForOfIteratorHelper2.default)(segs),
_step2;
try {
for (_iterator2.s(); !(_step2 = _iterator2.n()).done;) {
var seg = _step2.value;
var ccbits = seg.mode.numCharCountBits(version);
if (seg.numChars >= 1 << ccbits) return Infinity; // The segment's length doesn't fit the field's bit width
result += 4 + ccbits + seg.bitData.length;
}
} catch (err) {
_iterator2.e(err);
} finally {
_iterator2.f();
}
return result;
}
// Returns a new array of bytes representing the given string encoded in UTF-8.
}, {
key: "toUtf8ByteArray",
value: function toUtf8ByteArray(input) {
var str = encodeURI(input);
var result = [];
for (var i = 0; i < str.length; i++) {
if (str.charAt(i) != '%') result.push(str.charCodeAt(i));else {
result.push(parseInt(str.substring(i + 1, i + 3), 16));
i += 2;
}
}
return result;
}
/*-- Constants --*/
// Describes precisely all strings that are encodable in numeric mode.
}]);
return QrSegment;
}();
/*
* A QR Code symbol, which is a type of two-dimension barcode.
* Invented by Denso Wave and described in the ISO/IEC 18004 standard.
* Instances of this class represent an immutable square grid of dark and light cells.
* The class provides static factory functions to create a QR Code from text or binary data.
* The class covers the QR Code Model 2 specification, supporting all versions (sizes)
* from 1 to 40, all 4 error correction levels, and 4 character encoding modes.
*
* Ways to create a QR Code object:
* - High level: Take the payload data and call QrCode.encodeText() or QrCode.encodeBinary().
* - Mid level: Custom-make the list of segments and call QrCode.encodeSegments().
* - Low level: Custom-make the array of data codeword bytes (including
* segment headers and final padding, excluding error correction codewords),
* supply the appropriate version number, and call the QrCode() constructor.
* (Note that all ways require supplying the desired error correction level.)
*/
(0, _defineProperty2.default)(QrSegment, "NUMERIC_REGEX", /^[0-9]*$/);
// Describes precisely all strings that are encodable in alphanumeric mode.
(0, _defineProperty2.default)(QrSegment, "ALPHANUMERIC_REGEX", /^[A-Z0-9 $%*+.\/:-]*$/);
// The set of all legal characters in alphanumeric mode,
// where each character value maps to the index in the string.
(0, _defineProperty2.default)(QrSegment, "ALPHANUMERIC_CHARSET", '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ $%*+-./:');
var QrCode = exports.QrCode = /*#__PURE__*/function () {
// Creates a new QR Code with the given version number,
// error correction level, data codeword bytes, and mask number.
// This is a low-level API that most users should not use directly.
// A mid-level API is the encodeSegments() function.
function QrCode(
// The version number of this QR Code, which is between 1 and 40 (inclusive).
// This determines the size of this barcode.
version,
// The error correction level used in this QR Code.
errorCorrectionLevel, dataCodewords, oriMsk) {
(0, _classCallCheck2.default)(this, QrCode);
/*-- Fields --*/
// The width and height of this QR Code, measured in modules, between
// 21 and 177 (inclusive). This is equal to version * 4 + 17.
(0, _defineProperty2.default)(this, "size", void 0);
// The index of the mask pattern used in this QR Code, which is between 0 and 7 (inclusive).
// Even if a QR Code is created with automatic masking requested (mask = -1),
// the resulting object still has a mask value between 0 and 7.
(0, _defineProperty2.default)(this, "mask", void 0);
// The modules of this QR Code (false = light, true = dark).
// Immutable after constructor finishes. Accessed through getModule().
(0, _defineProperty2.default)(this, "modules", []);
// Indicates function modules that are not subjected to masking. Discarded when constructor finishes.
(0, _defineProperty2.default)(this, "isFunction", []);
/*-- Constructor (low level) and fields --*/
// The version number of this QR Code, which is between 1 and 40 (inclusive).
// This determines the size of this barcode.
(0, _defineProperty2.default)(this, "version", void 0);
// The error correction level used in this QR Code.
(0, _defineProperty2.default)(this, "errorCorrectionLevel", void 0);
var msk = oriMsk;
this.version = version;
this.errorCorrectionLevel = errorCorrectionLevel;
// Check scalar arguments
if (version < QrCode.MIN_VERSION || version > QrCode.MAX_VERSION) throw new RangeError('Version value out of range');
if (msk < -1 || msk > 7) throw new RangeError('Mask value out of range');
this.size = version * 4 + 17;
// Initialize both grids to be size*size arrays of Boolean false
var row = [];
for (var i = 0; i < this.size; i++) row.push(false);
for (var _i = 0; _i < this.size; _i++) {
this.modules.push(row.slice()); // Initially all light
this.isFunction.push(row.slice());
}
// Compute ECC, draw modules
this.drawFunctionPatterns();
var allCodewords = this.addEccAndInterleave(dataCodewords);
this.drawCodewords(allCodewords);
// Do masking
if (msk == -1) {
// Automatically choose best mask
var minPenalty = 1000000000;
for (var _i2 = 0; _i2 < 8; _i2++) {
this.applyMask(_i2);
this.drawFormatBits(_i2);
var penalty = this.getPenaltyScore();
if (penalty < minPenalty) {
msk = _i2;
minPenalty = penalty;
}
this.applyMask(_i2); // Undoes the mask due to XOR
}
}
assert(0 <= msk && msk <= 7);
this.mask = msk;
this.applyMask(msk); // Apply the final choice of mask
this.drawFormatBits(msk); // Overwrite old format bits
this.isFunction = [];
}
/*-- Accessor methods --*/
// Returns the color of the module (pixel) at the given coordinates, which is false
// for light or true for dark. The top left corner has the coordinates (x=0, y=0).
// If the given coordinates are out of bounds, then false (light) is returned.
(0, _createClass2.default)(QrCode, [{
key: "getModule",
value: function getModule(x, y) {
return 0 <= x && x < this.size && 0 <= y && y < this.size && this.modules[y][x];
}
// Modified to expose modules for easy access
}, {
key: "getModules",
value: function getModules() {
return this.modules;
}
/*-- Private helper methods for constructor: Drawing function modules --*/
// Reads this object's version field, and draws and marks all function modules.
}, {
key: "drawFunctionPatterns",
value: function drawFunctionPatterns() {
// Draw horizontal and vertical timing patterns
for (var i = 0; i < this.size; i++) {
this.setFunctionModule(6, i, i % 2 == 0);
this.setFunctionModule(i, 6, i % 2 == 0);
}
// Draw 3 finder patterns (all corners except bottom right; overwrites some timing modules)
this.drawFinderPattern(3, 3);
this.drawFinderPattern(this.size - 4, 3);
this.drawFinderPattern(3, this.size - 4);
// Draw numerous alignment patterns
var alignPatPos = this.getAlignmentPatternPositions();
var numAlign = alignPatPos.length;
for (var _i3 = 0; _i3 < numAlign; _i3++) {
for (var j = 0; j < numAlign; j++) {
// Don't draw on the three finder corners
if (!(_i3 == 0 && j == 0 || _i3 == 0 && j == numAlign - 1 || _i3 == numAlign - 1 && j == 0)) this.drawAlignmentPattern(alignPatPos[_i3], alignPatPos[j]);
}
}
// Draw configuration data
this.drawFormatBits(0); // Dummy mask value; overwritten later in the constructor
this.drawVersion();
}
// Draws two copies of the format bits (with its own error correction code)
// based on the given mask and this object's error correction level field.
}, {
key: "drawFormatBits",
value: function drawFormatBits(mask) {
// Calculate error correction code and pack bits
var data = this.errorCorrectionLevel.formatBits << 3 | mask; // errCorrLvl is unumber2, mask is unumber3
var rem = data;
for (var i = 0; i < 10; i++) rem = rem << 1 ^ (rem >>> 9) * 0x537;
var bits = (data << 10 | rem) ^ 0x5412; // unumber15
assert(bits >>> 15 == 0);
// Draw first copy
for (var _i4 = 0; _i4 <= 5; _i4++) this.setFunctionModule(8, _i4, getBit(bits, _i4));
this.setFunctionModule(8, 7, getBit(bits, 6));
this.setFunctionModule(8, 8, getBit(bits, 7));
this.setFunctionModule(7, 8, getBit(bits, 8));
for (var _i5 = 9; _i5 < 15; _i5++) this.setFunctionModule(14 - _i5, 8, getBit(bits, _i5));
// Draw second copy
for (var _i6 = 0; _i6 < 8; _i6++) this.setFunctionModule(this.size - 1 - _i6, 8, getBit(bits, _i6));
for (var _i7 = 8; _i7 < 15; _i7++) this.setFunctionModule(8, this.size - 15 + _i7, getBit(bits, _i7));
this.setFunctionModule(8, this.size - 8, true); // Always dark
}
// Draws two copies of the version bits (with its own error correction code),
// based on this object's version field, iff 7 <= version <= 40.
}, {
key: "drawVersion",
value: function drawVersion() {
if (this.version < 7) return;
// Calculate error correction code and pack bits
var rem = this.version; // version is unumber6, in the range [7, 40]
for (var i = 0; i < 12; i++) rem = rem << 1 ^ (rem >>> 11) * 0x1f25;
var bits = this.version << 12 | rem; // unumber18
assert(bits >>> 18 == 0);
// Draw two copies
for (var _i8 = 0; _i8 < 18; _i8++) {
var color = getBit(bits, _i8);
var a = this.size - 11 + _i8 % 3;
var b = Math.floor(_i8 / 3);
this.setFunctionModule(a, b, color);
this.setFunctionModule(b, a, color);
}
}
// Draws a 9*9 finder pattern including the border separator,
// with the center module at (x, y). Modules can be out of bounds.
}, {
key: "drawFinderPattern",
value: function drawFinderPattern(x, y) {
for (var dy = -4; dy <= 4; dy++) {
for (var dx = -4; dx <= 4; dx++) {
var dist = Math.max(Math.abs(dx), Math.abs(dy)); // Chebyshev/infinity norm
var xx = x + dx;
var yy = y + dy;
if (0 <= xx && xx < this.size && 0 <= yy && yy < this.size) this.setFunctionModule(xx, yy, dist != 2 && dist != 4);
}
}
}
// Draws a 5*5 alignment pattern, with the center module
// at (x, y). All modules must be in bounds.
}, {
key: "drawAlignmentPattern",
value: function drawAlignmentPattern(x, y) {
for (var dy = -2; dy <= 2; dy++) {
for (var dx = -2; dx <= 2; dx++) this.setFunctionModule(x + dx, y + dy, Math.max(Math.abs(dx), Math.abs(dy)) != 1);
}
}
// Sets the color of a module and marks it as a function module.
// Only used by the constructor. Coordinates must be in bounds.
}, {
key: "setFunctionModule",
value: function setFunctionModule(x, y, isDark) {
this.modules[y][x] = isDark;
this.isFunction[y][x] = true;
}
/*-- Private helper methods for constructor: Codewords and masking --*/
// Returns a new byte string representing the given data with the appropriate error correction
// codewords appended to it, based on this object's version and error correction level.
}, {
key: "addEccAndInterleave",
value: function addEccAndInterleave(data) {
var ver = this.version;
var ecl = this.errorCorrectionLevel;
if (data.length != QrCode.getNumDataCodewords(ver, ecl)) throw new RangeError('Invalid argument');
// Calculate parameter numbers
var numBlocks = QrCode.NUM_ERROR_CORRECTION_BLOCKS[ecl.ordinal][ver];
var blockEccLen = QrCode.ECC_CODEWORDS_PER_BLOCK[ecl.ordinal][ver];
var rawCodewords = Math.floor(QrCode.getNumRawDataModules(ver) / 8);
var numShortBlocks = numBlocks - rawCodewords % numBlocks;
var shortBlockLen = Math.floor(rawCodewords / numBlocks);
// Split data numbero blocks and append ECC to each block
var blocks = [];
var rsDiv = QrCode.reedSolomonComputeDivisor(blockEccLen);
for (var i = 0, k = 0; i < numBlocks; i++) {
var dat = data.slice(k, k + shortBlockLen - blockEccLen + (i < numShortBlocks ? 0 : 1));
k += dat.length;
var ecc = QrCode.reedSolomonComputeRemainder(dat, rsDiv);
if (i < numShortBlocks) dat.push(0);
blocks.push(dat.concat(ecc));
}
// Interleave (not concatenate) the bytes from every block numbero a single sequence
var result = [];
var _loop = function _loop(_i9) {
blocks.forEach(function (block, j) {
// Skip the padding byte in short blocks
if (_i9 != shortBlockLen - blockEccLen || j >= numShortBlocks) result.push(block[_i9]);
});
};
for (var _i9 = 0; _i9 < blocks[0].length; _i9++) {
_loop(_i9);
}
assert(result.length == rawCodewords);
return result;
}
// Draws the given sequence of 8-bit codewords (data and error correction) onto the entire
// data area of this QR Code. Function modules need to be marked off before this is called.
}, {
key: "drawCodewords",
value: function drawCodewords(data) {
if (data.length != Math.floor(QrCode.getNumRawDataModules(this.version) / 8)) throw new RangeError('Invalid argument');
var i = 0; // Bit index numbero the data
// Do the funny zigzag scan
for (var right = this.size - 1; right >= 1; right -= 2) {
// Index of right column in each column pair
if (right == 6) right = 5;
for (var vert = 0; vert < this.size; vert++) {
// Vertical counter
for (var j = 0; j < 2; j++) {
var x = right - j; // Actual x coordinate
var upward = (right + 1 & 2) == 0;
var y = upward ? this.size - 1 - vert : vert; // Actual y coordinate
if (!this.isFunction[y][x] && i < data.length * 8) {
this.modules[y][x] = getBit(data[i >>> 3], 7 - (i & 7));
i++;
}
// If this QR Code has any remainder bits (0 to 7), they were assigned as
// 0/false/light by the constructor and are left unchanged by this method
}
}
}
assert(i == data.length * 8);
}
// XORs the codeword modules in this QR Code with the given mask pattern.
// The function modules must be marked and the codeword bits must be drawn
// before masking. Due to the arithmetic of XOR, calling applyMask() with
// the same mask value a second time will undo the mask. A final well-formed
// QR Code needs exactly one (not zero, two, etc.) mask applied.
}, {
key: "applyMask",
value: function applyMask(mask) {
if (mask < 0 || mask > 7) throw new RangeError('Mask value out of range');
for (var y = 0; y < this.size; y++) {
for (var x = 0; x < this.size; x++) {
var invert = void 0;
switch (mask) {
case 0:
invert = (x + y) % 2 == 0;
break;
case 1:
invert = y % 2 == 0;
break;
case 2:
invert = x % 3 == 0;
break;
case 3:
invert = (x + y) % 3 == 0;
break;
case 4:
invert = (Math.floor(x / 3) + Math.floor(y / 2)) % 2 == 0;
break;
case 5:
invert = x * y % 2 + x * y % 3 == 0;
break;
case 6:
invert = (x * y % 2 + x * y % 3) % 2 == 0;
break;
case 7:
invert = ((x + y) % 2 + x * y % 3) % 2 == 0;
break;
default:
throw new Error('Unreachable');
}
if (!this.isFunction[y][x] && invert) this.modules[y][x] = !this.modules[y][x];
}
}
}
// Calculates and returns the penalty score based on state of this QR Code's current modules.
// This is used by the automatic mask choice algorithm to find the mask pattern that yields the lowest score.
}, {
key: "getPenaltyScore",
value: function getPenaltyScore() {
var result = 0;
// Adjacent modules in row having same color, and finder-like patterns
for (var y = 0; y < this.size; y++) {
var runColor = false;
var runX = 0;
var runHistory = [0, 0, 0, 0, 0, 0, 0];
for (var x = 0; x < this.size; x++) {
if (this.modules[y][x] == runColor) {
runX++;
if (runX == 5) result += QrCode.PENALTY_N1;else if (runX > 5) result++;
} else {
this.finderPenaltyAddHistory(runX, runHistory);
if (!runColor) result += this.finderPenaltyCountPatterns(runHistory) * QrCode.PENALTY_N3;
runColor = this.modules[y][x];
runX = 1;
}
}
result += this.finderPenaltyTerminateAndCount(runColor, runX, runHistory) * QrCode.PENALTY_N3;
}
// Adjacent modules in column having same color, and finder-like patterns
for (var _x = 0; _x < this.size; _x++) {
var _runColor = false;
var runY = 0;
var _runHistory = [0, 0, 0, 0, 0, 0, 0];
for (var _y = 0; _y < this.size; _y++) {
if (this.modules[_y][_x] == _runColor) {
runY++;
if (runY == 5) result += QrCode.PENALTY_N1;else if (runY > 5) result++;
} else {
this.finderPenaltyAddHistory(runY, _runHistory);
if (!_runColor) result += this.finderPenaltyCountPatterns(_runHistory) * QrCode.PENALTY_N3;
_runColor = this.modules[_y][_x];
runY = 1;
}
}
result += this.finderPenaltyTerminateAndCount(_runColor, runY, _runHistory) * QrCode.PENALTY_N3;
}
// 2*2 blocks of modules having same color
for (var _y2 = 0; _y2 < this.size - 1; _y2++) {
for (var _x2 = 0; _x2 < this.size - 1; _x2++) {
var color = this.modules[_y2][_x2];
if (color == this.modules[_y2][_x2 + 1] && color == this.modules[_y2 + 1][_x2] && color == this.modules[_y2 + 1][_x2 + 1]) result += QrCode.PENALTY_N2;
}
}
// Balance of dark and light modules
var dark = 0;
var _iterator3 = (0, _createForOfIteratorHelper2.default)(this.modules),
_step3;
try {
for (_iterator3.s(); !(_step3 = _iterator3.n()).done;) {
var row = _step3.value;
dark = row.reduce(function (sum, color) {
return sum + (color ? 1 : 0);
}, dark);
}
} catch (err) {
_iterator3.e(err);
} finally {
_iterator3.f();
}
var total = this.size * this.size; // Note that size is odd, so dark/total != 1/2
// Compute the smallest numbereger k >= 0 such that (45-5k)% <= dark/total <= (55+5k)%
var k = Math.ceil(Math.abs(dark * 20 - total * 10) / total) - 1;
assert(0 <= k && k <= 9);
result += k * QrCode.PENALTY_N4;
assert(0 <= result && result <= 2568888); // Non-tight upper bound based on default values of PENALTY_N1, ..., N4
return result;
}
/*-- Private helper functions --*/
// Returns an ascending list of positions of alignment patterns for this version number.
// Each position is in the range [0,177), and are used on both the x and y axes.
// This could be implemented as lookup table of 40 variable-length lists of numberegers.
}, {
key: "getAlignmentPatternPositions",
value: function getAlignmentPatternPositions() {
if (this.version == 1) return [];else {
var numAlign = Math.floor(this.version / 7) + 2;
var step = this.version == 32 ? 26 : Math.ceil((this.version * 4 + 4) / (numAlign * 2 - 2)) * 2;
var result = [6];
for (var pos = this.size - 7; result.length < numAlign; pos -= step) result.splice(1, 0, pos);
return result;
}
}
// Returns the number of data bits that can be stored in a QR Code of the given version number, after
// all function modules are excluded. This includes remainder bits, so it might not be a multiple of 8.
// The result is in the range [208, 29648]. This could be implemented as a 40-entry lookup table.
}, {
key: "finderPenaltyCountPatterns",
value:
// Can only be called immediately after a light run is added, and
// returns either 0, 1, or 2. A helper function for getPenaltyScore().
function finderPenaltyCountPatterns(runHistory) {
var n = runHistory[1];
assert(n <= this.size * 3);
var core = n > 0 && runHistory[2] == n && runHistory[3] == n * 3 && runHistory[4] == n && runHistory[5] == n;
return (core && runHistory[0] >= n * 4 && runHistory[6] >= n ? 1 : 0) + (core && runHistory[6] >= n * 4 && runHistory[0] >= n ? 1 : 0);
}
// Must be called at the end of a line (row or column) of modules. A helper function for getPenaltyScore().
}, {
key: "finderPenaltyTerminateAndCount",
value: function finderPenaltyTerminateAndCount(currentRunColor, oriCurrentRunLength, runHistory) {
var currentRunLength = oriCurrentRunLength;
if (currentRunColor) {
// Terminate dark run
this.finderPenaltyAddHistory(currentRunLength, runHistory);
currentRunLength = 0;
}
currentRunLength += this.size; // Add light border to final run
this.finderPenaltyAddHistory(currentRunLength, runHistory);
return this.finderPenaltyCountPatterns(runHistory);
}
// Pushes the given value to the front and drops the last value. A helper function for getPenaltyScore().
}, {
key: "finderPenaltyAddHistory",
value: function finderPenaltyAddHistory(oriCurrentRunLength, runHistory) {
var currentRunLength = oriCurrentRunLength;
if (runHistory[0] == 0) currentRunLength += this.size; // Add light border to initial run
runHistory.pop();
runHistory.unshift(currentRunLength);
}
/*-- Constants and tables --*/
// The minimum version number supported in the QR Code Model 2 standard.
}], [{
key: "encodeText",
value: /*-- Static factory functions (high level) --*/
// Returns a QR Code representing the given Unicode text string at the given error correction level.
// As a conservative upper bound, this function is guaranteed to succeed for strings that have 738 or fewer
// Unicode code ponumbers (not UTF-16 code units) if the low error correction level is used. The smallest possible
// QR Code version is automatically chosen for the output. The ECC level of the result may be higher than the
// ecl argument if it can be done without increasing the version.
function encodeText(text, ecl) {
var segs = QrSegment.makeSegments(text);
return QrCode.encodeSegments(segs, ecl);
}
// Returns a QR Code representing the given binary data at the given error correction level.
// This function always encodes using the binary segment mode, not any text mode. The maximum number of
// bytes allowed is 2953. The smallest possible QR Code version is automatically chosen for the output.
// The ECC level of the result may be higher than the ecl argument if it can be done without increasing the version.
}, {
key: "encodeBinary",
value: function encodeBinary(data, ecl) {
var seg = QrSegment.makeBytes(data);
return QrCode.encodeSegments([seg], ecl);
}
/*-- Static factory functions (mid level) --*/
// Returns a QR Code representing the given segments with the given encoding parameters.
// The smallest possible QR Code version within the given range is automatically
// chosen for the output. Iff boostEcl is true, then the ECC level of the result
// may be higher than the ecl argument if it can be done without increasing the
// version. The mask number is either between 0 to 7 (inclusive) to force that
// mask, or -1 to automatically choose an appropriate mask (which may be slow).
// This function allows the user to create a custom sequence of segments that switches
// between modes (such as alphanumeric and byte) to encode text in less space.
// This is a mid-level API; the high-level API is encodeText() and encodeBinary().
}, {
key: "encodeSegments",
value: function encodeSegments(segs, oriEcl) {
var minVersion = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : 1;
var maxVersion = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : 40;
var mask = arguments.length > 4 && arguments[4] !== undefined ? arguments[4] : -1;
var boostEcl = arguments.length > 5 && arguments[5] !== undefined ? arguments[5] : true;
if (!(QrCode.MIN_VERSION <= minVersion && minVersion <= maxVersion && maxVersion <= QrCode.MAX_VERSION) || mask < -1 || mask > 7) throw new RangeError('Invalid value');
// Find the minimal version number to use
var version;
var dataUsedBits;
for (version = minVersion;; version++) {
var _dataCapacityBits = QrCode.getNumDataCodewords(version, oriEcl) * 8; // Number of data bits available
var usedBits = QrSegment.getTotalBits(segs, version);
if (usedBits <= _dataCapacityBits) {
dataUsedBits = usedBits;
break; // This version number is found to be suitable
}
if (version >= maxVersion)
// All versions in the range could not fit the given data
throw new RangeError('Data too long');
}
var ecl = oriEcl;
// Increase the error correction level while the data still fits in the current version number
for (var _i10 = 0, _arr = [Ecc.MEDIUM, Ecc.QUARTILE, Ecc.HIGH]; _i10 < _arr.length; _i10++) {
var newEcl = _arr[_i10];
// From low to high
if (boostEcl && dataUsedBits <= QrCode.getNumDataCodewords(version, newEcl) * 8) ecl = newEcl;
}
// Concatenate all segments to create the data bit string
var bb = [];
var _iterator4 = (0, _createForOfIteratorHelper2.default)(segs),
_step4;
try {
for (_iterator4.s(); !(_step4 = _iterator4.n()).done;) {
var seg = _step4.value;
appendBits(seg.mode.modeBits, 4, bb);
appendBits(seg.numChars, seg.mode.numCharCountBits(version), bb);
var _iterator5 = (0, _createForOfIteratorHelper2.default)(seg.getData()),
_step5;
try {
for (_iterator5.s(); !(_step5 = _iterator5.n()).done;) {
var b = _step5.value;
bb.push(b);
}
} catch (err) {
_iterator5.e(err);
} finally {
_iterator5.f();
}
}
} catch (err) {
_iterator4.e(err);
} finally {
_iterator4.f();
}
assert(bb.length == dataUsedBits);
// Add terminator and pad up to a byte if applicable
var dataCapacityBits = QrCode.getNumDataCodewords(version, ecl) * 8;
assert(bb.length <= dataCapacityBits);
appendBits(0, Math.min(4, dataCapacityBits - bb.length), bb);
appendBits(0, (8 - bb.length % 8) % 8, bb);
assert(bb.length % 8 == 0);
// Pad with alternating bytes until data capacity is reached
for (var padByte = 0xec; bb.length < dataCapacityBits; padByte ^= 0xec ^ 0x11) appendBits(padByte, 8, bb);
// Pack bits numbero bytes in big endian
var dataCodewords = [];
while (dataCodewords.length * 8 < bb.length) dataCodewords.push(0);
bb.forEach(function (b, i) {
return dataCodewords[i >>> 3] |= b << 7 - (i & 7);
});
// Create the QR Code object
return new QrCode(version, ecl, dataCodewords, mask);
}
}, {
key: "getNumRawDataModules",
value: function getNumRawDataModules(ver) {
if (ver < QrCode.MIN_VERSION || ver > QrCode.MAX_VERSION) throw new RangeError('Version number out of range');
var result = (16 * ver + 128) * ver + 64;
if (ver >= 2) {
var numAlign = Math.floor(ver / 7) + 2;
result -= (25 * numAlign - 10) * numAlign - 55;
if (ver >= 7) result -= 36;
}
assert(208 <= result && result <= 29648);
return result;
}
// Returns the number of 8-bit data (i.e. not error correction) codewords contained in any
// QR Code of the given version number and error correction level, with remainder bits discarded.
// This stateless pure function could be implemented as a (40*4)-cell lookup table.
}, {
key: "getNumDataCodewords",
value: function getNumDataCodewords(ver, ecl) {
return Math.floor(QrCode.getNumRawDataModules(ver) / 8) - QrCode.ECC_CODEWORDS_PER_BLOCK[ecl.ordinal][ver] * QrCode.NUM_ERROR_CORRECTION_BLOCKS[ecl.ordinal][ver];
}
// Returns a Reed-Solomon ECC generator polynomial for the given degree. This could be
// implemented as a lookup table over all possible parameter values, instead of as an algorithm.
}, {
key: "reedSolomonComputeDivisor",
value: function reedSolomonComputeDivisor(degree) {
if (degree < 1 || degree > 255) throw new RangeError('Degree out of range');
// Polynomial coefficients are stored from highest to lowest power, excluding the leading term which is always 1.
// For example the polynomial x^3 + 255x^2 + 8x + 93 is stored as the unumber8 array [255, 8, 93].
var result = [];
for (var i = 0; i < degree - 1; i++) result.push(0);
result.push(1); // Start off with the monomial x^0
// Compute the product polynomial (x - r^0) * (x - r^1) * (x - r^2) * ... * (x - r^{degree-1}),
// and drop the highest monomial term which is always 1x^degree.
// Note that r = 0x02, which is a generator element of this field GF(2^8/0x11D).
var root = 1;
for (var _i11 = 0; _i11 < degree; _i11++) {
// Multiply the current product by (x - r^i)
for (var j = 0; j < result.length; j++) {
result[j] = QrCode.reedSolomonMultiply(result[j], root);
if (j + 1 < result.length) result[j] ^= result[j + 1];
}
root = QrCode.reedSolomonMultiply(root, 0x02);
}
return result;
}
// Returns the Reed-Solomon error correction codeword for the given data and divisor polynomials.
}, {
key: "reedSolomonComputeRemainder",
value: function reedSolomonComputeRemainder(data, divisor) {
var result = divisor.map(function () {
return 0;
});
var _iterator6 = (0, _createForOfIteratorHelper2.default)(data),
_step6;
try {
var _loop2 = function _loop2() {
var b = _step6.value;
// Polynomial division
var factor = b ^ result.shift();
result.push(0);
divisor.forEach(function (coef, i) {
return result[i] ^= QrCode.reedSolomonMultiply(coef, factor);
});
};
for (_iterator6.s(); !(_step6 = _iterator6.n()).done;) {
_loop2();
}
} catch (err) {
_iterator6.e(err);
} finally {
_iterator6.f();
}
return result;
}
// Returns the product of the two given field elements modulo GF(2^8/0x11D). The arguments and result
// are unsigned 8-bit numberegers. This could be implemented as a lookup table of 256*256 entries of unumber8.
}, {
key: "reedSolomonMultiply",
value: function reedSolomonMultiply(x, y) {
if (x >>> 8 != 0 || y >>> 8 != 0) throw new RangeError('Byte out of range');
// Russian peasant multiplication
var z = 0;
for (var i = 7; i >= 0; i--) {
z = z << 1 ^ (z >>> 7) * 0x11d;
z ^= (y >>> i & 1) * x;
}
assert(z >>> 8 == 0);
return z;
}
}]);
return QrCode;
}();
(0, _defineProperty2.default)(QrCode, "MIN_VERSION", 1);
// The maximum version number supported in the QR Code Model 2 standard.
(0, _defineProperty2.default)(QrCode, "MAX_VERSION", 40);
// For use in getPenaltyScore(), when evaluating which mask is best.
(0, _defineProperty2.default)(QrCode, "PENALTY_N1", 3);
(0, _defineProperty2.default)(QrCode, "PENALTY_N2", 3);
(0, _defineProperty2.default)(QrCode, "PENALTY_N3", 40);
(0, _defineProperty2.default)(QrCode, "PENALTY_N4", 10);
(0, _defineProperty2.default)(QrCode, "ECC_CODEWORDS_PER_BLOCK", [
// Version: (note that index 0 is for padding, and is set to an illegal value)
//0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40 Error correction level
[-1, 7, 10, 15, 20, 26, 18, 20, 24, 30, 18, 20, 24, 26, 30, 22, 24, 28, 30, 28, 28, 28, 28, 30, 30, 26, 28, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30],
// Low
[-1, 10, 16, 26, 18, 24, 16, 18, 22, 22, 26, 30, 22, 22, 24, 24, 28, 28, 26, 26, 26, 26, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28],
// Medium
[-1, 13, 22, 18, 26, 18, 24, 18, 22, 20, 24, 28, 26, 24, 20, 30, 24, 28, 28, 26, 30, 28, 30, 30, 30, 30, 28, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30],
// Quartile
[-1, 17, 28, 22, 16, 22, 28, 26, 26, 24, 28, 24, 28, 22, 24, 24, 30, 28, 28, 26, 28, 30, 24, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30] // High
]);
(0, _defineProperty2.default)(QrCode, "NUM_ERROR_CORRECTION_BLOCKS", [
// Version: (note that index 0 is for padding, and is set to an illegal value)
//0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40 Error correction level
[-1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 4, 4, 4, 4, 4, 6, 6, 6, 6, 7, 8, 8, 9, 9, 10, 12, 12, 12, 13, 14, 15, 16, 17, 18, 19, 19, 20, 21, 22, 24, 25],
// Low
[-1, 1, 1, 1, 2, 2, 4, 4, 4, 5, 5, 5, 8, 9, 9, 10, 10, 11, 13, 14, 16, 17, 17, 18, 20, 21, 23, 25, 26, 28, 29, 31, 33, 35, 37, 38, 40, 43, 45, 47, 49],
// Medium
[-1, 1, 1, 2, 2, 4, 4, 6, 6, 8, 8, 8, 10, 12, 16, 12, 17, 16, 18, 21, 20, 23, 23, 25, 27, 29, 34, 34, 35, 38, 40, 43, 45, 48, 51, 53, 56, 59, 62, 65, 68],
// Quartile
[-1, 1, 1, 2, 4, 4, 4, 5, 6, 8, 8, 11, 11, 16, 16, 18, 16, 19, 21, 25, 25, 25, 34, 30, 32, 35, 37, 40, 42, 45, 48, 51, 54, 57, 60, 63, 66, 70, 74, 77, 81] // High
]);