748 lines
27 KiB
JavaScript
748 lines
27 KiB
JavaScript
'use strict';
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var QrCodeDataType = /* @__PURE__ */ ((QrCodeDataType2) => {
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QrCodeDataType2[QrCodeDataType2["Border"] = -1] = "Border";
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QrCodeDataType2[QrCodeDataType2["Data"] = 0] = "Data";
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QrCodeDataType2[QrCodeDataType2["Function"] = 1] = "Function";
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QrCodeDataType2[QrCodeDataType2["Position"] = 2] = "Position";
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QrCodeDataType2[QrCodeDataType2["Timing"] = 3] = "Timing";
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QrCodeDataType2[QrCodeDataType2["Alignment"] = 4] = "Alignment";
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return QrCodeDataType2;
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})(QrCodeDataType || {});
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var __defProp = Object.defineProperty;
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var __defNormalProp = (obj, key, value) => key in obj ? __defProp(obj, key, { enumerable: true, configurable: true, writable: true, value }) : obj[key] = value;
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var __publicField = (obj, key, value) => {
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__defNormalProp(obj, typeof key !== "symbol" ? key + "" : key, value);
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return value;
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};
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const LOW = [0, 1];
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const MEDIUM = [1, 0];
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const QUARTILE = [2, 3];
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const HIGH = [3, 2];
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const EccMap = {
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L: LOW,
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M: MEDIUM,
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Q: QUARTILE,
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H: HIGH
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};
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const NUMERIC_REGEX = /^[0-9]*$/;
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const ALPHANUMERIC_REGEX = /^[A-Z0-9 $%*+.\/:-]*$/;
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const ALPHANUMERIC_CHARSET = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ $%*+-./:";
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const MIN_VERSION = 1;
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const MAX_VERSION = 40;
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const PENALTY_N1 = 3;
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const PENALTY_N2 = 3;
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const PENALTY_N3 = 40;
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const PENALTY_N4 = 10;
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const ECC_CODEWORDS_PER_BLOCK = [
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// Version: (note that index 0 is for padding, and is set to an illegal value)
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// 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
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[-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],
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// Low
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[-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],
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// Medium
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[-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],
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// Quartile
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[-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]
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// High
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];
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const NUM_ERROR_CORRECTION_BLOCKS = [
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// Version: (note that index 0 is for padding, and is set to an illegal value)
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// 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
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[-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],
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// Low
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[-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],
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// Medium
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[-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],
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// Quartile
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[-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]
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// High
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];
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class QrCode {
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/* -- Constructor (low level) and fields -- */
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// Creates a new QR Code with the given version number,
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// error correction level, data codeword bytes, and mask number.
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// This is a low-level API that most users should not use directly.
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// A mid-level API is the encodeSegments() function.
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constructor(version, ecc, dataCodewords, msk) {
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this.version = version;
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this.ecc = ecc;
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/* -- Fields -- */
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// The width and height of this QR Code, measured in modules, between
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// 21 and 177 (inclusive). This is equal to version * 4 + 17.
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__publicField(this, "size");
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// The index of the mask pattern used in this QR Code, which is between 0 and 7 (inclusive).
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// Even if a QR Code is created with automatic masking requested (mask = -1),
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// the resulting object still has a mask value between 0 and 7.
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__publicField(this, "mask");
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// The modules of this QR Code (false = light, true = dark).
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// Immutable after constructor finishes. Accessed through getModule().
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__publicField(this, "modules", []);
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__publicField(this, "types", []);
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if (version < MIN_VERSION || version > MAX_VERSION)
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throw new RangeError("Version value out of range");
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if (msk < -1 || msk > 7)
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throw new RangeError("Mask value out of range");
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this.size = version * 4 + 17;
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const row = Array.from({ length: this.size }, () => false);
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for (let i = 0; i < this.size; i++) {
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this.modules.push(row.slice());
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this.types.push(row.map(() => 0));
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}
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this.drawFunctionPatterns();
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const allCodewords = this.addEccAndInterleave(dataCodewords);
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this.drawCodewords(allCodewords);
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if (msk === -1) {
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let minPenalty = 1e9;
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for (let i = 0; i < 8; i++) {
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this.applyMask(i);
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this.drawFormatBits(i);
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const penalty = this.getPenaltyScore();
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if (penalty < minPenalty) {
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msk = i;
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minPenalty = penalty;
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}
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this.applyMask(i);
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}
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}
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this.mask = msk;
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this.applyMask(msk);
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this.drawFormatBits(msk);
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}
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/* -- Accessor methods -- */
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// Returns the color of the module (pixel) at the given coordinates, which is false
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// for light or true for dark. The top left corner has the coordinates (x=0, y=0).
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// If the given coordinates are out of bounds, then false (light) is returned.
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getModule(x, y) {
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return x >= 0 && x < this.size && y >= 0 && y < this.size && this.modules[y][x];
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}
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/* -- Private helper methods for constructor: Drawing function modules -- */
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// Reads this object's version field, and draws and marks all function modules.
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drawFunctionPatterns() {
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for (let i = 0; i < this.size; i++) {
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this.setFunctionModule(6, i, i % 2 === 0, QrCodeDataType.Timing);
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this.setFunctionModule(i, 6, i % 2 === 0, QrCodeDataType.Timing);
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}
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this.drawFinderPattern(3, 3);
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this.drawFinderPattern(this.size - 4, 3);
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this.drawFinderPattern(3, this.size - 4);
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const alignPatPos = this.getAlignmentPatternPositions();
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const numAlign = alignPatPos.length;
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for (let i = 0; i < numAlign; i++) {
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for (let j = 0; j < numAlign; j++) {
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if (!(i === 0 && j === 0 || i === 0 && j === numAlign - 1 || i === numAlign - 1 && j === 0))
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this.drawAlignmentPattern(alignPatPos[i], alignPatPos[j]);
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}
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}
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this.drawFormatBits(0);
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this.drawVersion();
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}
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// Draws two copies of the format bits (with its own error correction code)
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// based on the given mask and this object's error correction level field.
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drawFormatBits(mask) {
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const data = this.ecc[1] << 3 | mask;
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let rem = data;
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for (let i = 0; i < 10; i++)
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rem = rem << 1 ^ (rem >>> 9) * 1335;
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const bits = (data << 10 | rem) ^ 21522;
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for (let i = 0; i <= 5; i++)
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this.setFunctionModule(8, i, getBit(bits, i));
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this.setFunctionModule(8, 7, getBit(bits, 6));
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this.setFunctionModule(8, 8, getBit(bits, 7));
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this.setFunctionModule(7, 8, getBit(bits, 8));
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for (let i = 9; i < 15; i++)
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this.setFunctionModule(14 - i, 8, getBit(bits, i));
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for (let i = 0; i < 8; i++)
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this.setFunctionModule(this.size - 1 - i, 8, getBit(bits, i));
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for (let i = 8; i < 15; i++)
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this.setFunctionModule(8, this.size - 15 + i, getBit(bits, i));
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this.setFunctionModule(8, this.size - 8, true);
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}
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// Draws two copies of the version bits (with its own error correction code),
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// based on this object's version field, iff 7 <= version <= 40.
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drawVersion() {
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if (this.version < 7)
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return;
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let rem = this.version;
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for (let i = 0; i < 12; i++)
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rem = rem << 1 ^ (rem >>> 11) * 7973;
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const bits = this.version << 12 | rem;
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for (let i = 0; i < 18; i++) {
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const color = getBit(bits, i);
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const a = this.size - 11 + i % 3;
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const b = Math.floor(i / 3);
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this.setFunctionModule(a, b, color);
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this.setFunctionModule(b, a, color);
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}
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}
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// Draws a 9*9 finder pattern including the border separator,
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// with the center module at (x, y). Modules can be out of bounds.
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drawFinderPattern(x, y) {
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for (let dy = -4; dy <= 4; dy++) {
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for (let dx = -4; dx <= 4; dx++) {
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const dist = Math.max(Math.abs(dx), Math.abs(dy));
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const xx = x + dx;
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const yy = y + dy;
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if (xx >= 0 && xx < this.size && yy >= 0 && yy < this.size)
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this.setFunctionModule(xx, yy, dist !== 2 && dist !== 4, QrCodeDataType.Position);
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}
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}
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}
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// Draws a 5*5 alignment pattern, with the center module
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// at (x, y). All modules must be in bounds.
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drawAlignmentPattern(x, y) {
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for (let dy = -2; dy <= 2; dy++) {
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for (let dx = -2; dx <= 2; dx++) {
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this.setFunctionModule(
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x + dx,
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y + dy,
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Math.max(Math.abs(dx), Math.abs(dy)) !== 1,
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QrCodeDataType.Alignment
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);
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}
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}
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}
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// Sets the color of a module and marks it as a function module.
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// Only used by the constructor. Coordinates must be in bounds.
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setFunctionModule(x, y, isDark, type = QrCodeDataType.Function) {
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this.modules[y][x] = isDark;
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this.types[y][x] = type;
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}
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/* -- Private helper methods for constructor: Codewords and masking -- */
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// Returns a new byte string representing the given data with the appropriate error correction
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// codewords appended to it, based on this object's version and error correction level.
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addEccAndInterleave(data) {
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const ver = this.version;
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const ecl = this.ecc;
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if (data.length !== getNumDataCodewords(ver, ecl))
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throw new RangeError("Invalid argument");
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const numBlocks = NUM_ERROR_CORRECTION_BLOCKS[ecl[0]][ver];
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const blockEccLen = ECC_CODEWORDS_PER_BLOCK[ecl[0]][ver];
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const rawCodewords = Math.floor(getNumRawDataModules(ver) / 8);
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const numShortBlocks = numBlocks - rawCodewords % numBlocks;
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const shortBlockLen = Math.floor(rawCodewords / numBlocks);
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const blocks = [];
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const rsDiv = reedSolomonComputeDivisor(blockEccLen);
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for (let i = 0, k = 0; i < numBlocks; i++) {
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const dat = data.slice(k, k + shortBlockLen - blockEccLen + (i < numShortBlocks ? 0 : 1));
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k += dat.length;
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const ecc = reedSolomonComputeRemainder(dat, rsDiv);
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if (i < numShortBlocks)
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dat.push(0);
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blocks.push(dat.concat(ecc));
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}
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const result = [];
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for (let i = 0; i < blocks[0].length; i++) {
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blocks.forEach((block, j) => {
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if (i !== shortBlockLen - blockEccLen || j >= numShortBlocks)
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result.push(block[i]);
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});
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}
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return result;
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}
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// Draws the given sequence of 8-bit codewords (data and error correction) onto the entire
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// data area of this QR Code. Function modules need to be marked off before this is called.
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drawCodewords(data) {
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if (data.length !== Math.floor(getNumRawDataModules(this.version) / 8))
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throw new RangeError("Invalid argument");
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let i = 0;
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for (let right = this.size - 1; right >= 1; right -= 2) {
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if (right === 6)
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right = 5;
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for (let vert = 0; vert < this.size; vert++) {
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for (let j = 0; j < 2; j++) {
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const x = right - j;
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const upward = (right + 1 & 2) === 0;
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const y = upward ? this.size - 1 - vert : vert;
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if (!this.types[y][x] && i < data.length * 8) {
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this.modules[y][x] = getBit(data[i >>> 3], 7 - (i & 7));
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i++;
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}
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}
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}
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}
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}
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// XORs the codeword modules in this QR Code with the given mask pattern.
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// The function modules must be marked and the codeword bits must be drawn
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// before masking. Due to the arithmetic of XOR, calling applyMask() with
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// the same mask value a second time will undo the mask. A final well-formed
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// QR Code needs exactly one (not zero, two, etc.) mask applied.
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applyMask(mask) {
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if (mask < 0 || mask > 7)
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throw new RangeError("Mask value out of range");
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for (let y = 0; y < this.size; y++) {
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for (let x = 0; x < this.size; x++) {
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let invert;
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switch (mask) {
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case 0:
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invert = (x + y) % 2 === 0;
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break;
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case 1:
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invert = y % 2 === 0;
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break;
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case 2:
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invert = x % 3 === 0;
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break;
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case 3:
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invert = (x + y) % 3 === 0;
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break;
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case 4:
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invert = (Math.floor(x / 3) + Math.floor(y / 2)) % 2 === 0;
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break;
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case 5:
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invert = x * y % 2 + x * y % 3 === 0;
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break;
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case 6:
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invert = (x * y % 2 + x * y % 3) % 2 === 0;
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break;
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case 7:
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invert = ((x + y) % 2 + x * y % 3) % 2 === 0;
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break;
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default:
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throw new Error("Unreachable");
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}
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if (!this.types[y][x] && invert)
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this.modules[y][x] = !this.modules[y][x];
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}
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}
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}
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// Calculates and returns the penalty score based on state of this QR Code's current modules.
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// This is used by the automatic mask choice algorithm to find the mask pattern that yields the lowest score.
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getPenaltyScore() {
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let result = 0;
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for (let y = 0; y < this.size; y++) {
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let runColor = false;
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let runX = 0;
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const runHistory = [0, 0, 0, 0, 0, 0, 0];
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for (let x = 0; x < this.size; x++) {
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if (this.modules[y][x] === runColor) {
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runX++;
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if (runX === 5)
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result += PENALTY_N1;
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else if (runX > 5)
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result++;
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} else {
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this.finderPenaltyAddHistory(runX, runHistory);
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if (!runColor)
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result += this.finderPenaltyCountPatterns(runHistory) * PENALTY_N3;
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runColor = this.modules[y][x];
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runX = 1;
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}
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}
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result += this.finderPenaltyTerminateAndCount(runColor, runX, runHistory) * PENALTY_N3;
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}
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for (let x = 0; x < this.size; x++) {
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let runColor = false;
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let runY = 0;
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const runHistory = [0, 0, 0, 0, 0, 0, 0];
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for (let y = 0; y < this.size; y++) {
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if (this.modules[y][x] === runColor) {
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runY++;
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if (runY === 5)
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result += PENALTY_N1;
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else if (runY > 5)
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result++;
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} else {
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this.finderPenaltyAddHistory(runY, runHistory);
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if (!runColor)
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result += this.finderPenaltyCountPatterns(runHistory) * PENALTY_N3;
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runColor = this.modules[y][x];
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runY = 1;
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}
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}
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result += this.finderPenaltyTerminateAndCount(runColor, runY, runHistory) * PENALTY_N3;
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}
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for (let y = 0; y < this.size - 1; y++) {
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for (let x = 0; x < this.size - 1; x++) {
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const color = this.modules[y][x];
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if (color === this.modules[y][x + 1] && color === this.modules[y + 1][x] && color === this.modules[y + 1][x + 1])
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result += PENALTY_N2;
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}
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}
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let dark = 0;
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for (const row of this.modules)
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dark = row.reduce((sum, color) => sum + (color ? 1 : 0), dark);
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const total = this.size * this.size;
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const k = Math.ceil(Math.abs(dark * 20 - total * 10) / total) - 1;
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result += k * PENALTY_N4;
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return result;
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}
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/* -- Private helper functions -- */
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// Returns an ascending list of positions of alignment patterns for this version number.
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// Each position is in the range [0,177), and are used on both the x and y axes.
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// This could be implemented as lookup table of 40 variable-length lists of integers.
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getAlignmentPatternPositions() {
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if (this.version === 1) {
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return [];
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} else {
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const numAlign = Math.floor(this.version / 7) + 2;
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const step = this.version === 32 ? 26 : Math.ceil((this.version * 4 + 4) / (numAlign * 2 - 2)) * 2;
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const result = [6];
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for (let pos = this.size - 7; result.length < numAlign; pos -= step)
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result.splice(1, 0, pos);
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return result;
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}
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}
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// Can only be called immediately after a light run is added, and
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// returns either 0, 1, or 2. A helper function for getPenaltyScore().
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finderPenaltyCountPatterns(runHistory) {
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const n = runHistory[1];
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const 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().
|
|
finderPenaltyTerminateAndCount(currentRunColor, currentRunLength, runHistory) {
|
|
if (currentRunColor) {
|
|
this.finderPenaltyAddHistory(currentRunLength, runHistory);
|
|
currentRunLength = 0;
|
|
}
|
|
currentRunLength += this.size;
|
|
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().
|
|
finderPenaltyAddHistory(currentRunLength, runHistory) {
|
|
if (runHistory[0] === 0)
|
|
currentRunLength += this.size;
|
|
runHistory.pop();
|
|
runHistory.unshift(currentRunLength);
|
|
}
|
|
}
|
|
function appendBits(val, len, bb) {
|
|
if (len < 0 || len > 31 || val >>> len !== 0)
|
|
throw new RangeError("Value out of range");
|
|
for (let i = len - 1; i >= 0; i--)
|
|
bb.push(val >>> i & 1);
|
|
}
|
|
function getBit(x, i) {
|
|
return (x >>> i & 1) !== 0;
|
|
}
|
|
class QrSegment {
|
|
// 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 constraint isn't checked. The given bit buffer is cloned and stored.
|
|
constructor(mode, numChars, bitData) {
|
|
this.mode = mode;
|
|
this.numChars = numChars;
|
|
this.bitData = bitData;
|
|
if (numChars < 0)
|
|
throw new RangeError("Invalid argument");
|
|
this.bitData = bitData.slice();
|
|
}
|
|
/* -- Methods -- */
|
|
// Returns a new copy of the data bits of this segment.
|
|
getData() {
|
|
return this.bitData.slice();
|
|
}
|
|
}
|
|
const MODE_NUMERIC = [1, 10, 12, 14];
|
|
const MODE_ALPHANUMERIC = [2, 9, 11, 13];
|
|
const MODE_BYTE = [4, 8, 16, 16];
|
|
function numCharCountBits(mode, ver) {
|
|
return mode[Math.floor((ver + 7) / 17) + 1];
|
|
}
|
|
function makeBytes(data) {
|
|
const bb = [];
|
|
for (const b of data)
|
|
appendBits(b, 8, bb);
|
|
return new QrSegment(MODE_BYTE, data.length, bb);
|
|
}
|
|
function makeNumeric(digits) {
|
|
if (!isNumeric(digits))
|
|
throw new RangeError("String contains non-numeric characters");
|
|
const bb = [];
|
|
for (let i = 0; i < digits.length; ) {
|
|
const n = Math.min(digits.length - i, 3);
|
|
appendBits(Number.parseInt(digits.substring(i, i + n), 10), n * 3 + 1, bb);
|
|
i += n;
|
|
}
|
|
return new QrSegment(MODE_NUMERIC, digits.length, bb);
|
|
}
|
|
function makeAlphanumeric(text) {
|
|
if (!isAlphanumeric(text))
|
|
throw new RangeError("String contains unencodable characters in alphanumeric mode");
|
|
const bb = [];
|
|
let i;
|
|
for (i = 0; i + 2 <= text.length; i += 2) {
|
|
let temp = ALPHANUMERIC_CHARSET.indexOf(text.charAt(i)) * 45;
|
|
temp += ALPHANUMERIC_CHARSET.indexOf(text.charAt(i + 1));
|
|
appendBits(temp, 11, bb);
|
|
}
|
|
if (i < text.length)
|
|
appendBits(ALPHANUMERIC_CHARSET.indexOf(text.charAt(i)), 6, bb);
|
|
return new QrSegment(MODE_ALPHANUMERIC, text.length, bb);
|
|
}
|
|
function makeSegments(text) {
|
|
if (text === "")
|
|
return [];
|
|
else if (isNumeric(text))
|
|
return [makeNumeric(text)];
|
|
else if (isAlphanumeric(text))
|
|
return [makeAlphanumeric(text)];
|
|
else
|
|
return [makeBytes(toUtf8ByteArray(text))];
|
|
}
|
|
function isNumeric(text) {
|
|
return NUMERIC_REGEX.test(text);
|
|
}
|
|
function isAlphanumeric(text) {
|
|
return ALPHANUMERIC_REGEX.test(text);
|
|
}
|
|
function getTotalBits(segs, version) {
|
|
let result = 0;
|
|
for (const seg of segs) {
|
|
const ccbits = numCharCountBits(seg.mode, version);
|
|
if (seg.numChars >= 1 << ccbits)
|
|
return Number.POSITIVE_INFINITY;
|
|
result += 4 + ccbits + seg.bitData.length;
|
|
}
|
|
return result;
|
|
}
|
|
function toUtf8ByteArray(str) {
|
|
str = encodeURI(str);
|
|
const result = [];
|
|
for (let i = 0; i < str.length; i++) {
|
|
if (str.charAt(i) !== "%") {
|
|
result.push(str.charCodeAt(i));
|
|
} else {
|
|
result.push(Number.parseInt(str.substring(i + 1, i + 3), 16));
|
|
i += 2;
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
function getNumRawDataModules(ver) {
|
|
if (ver < MIN_VERSION || ver > MAX_VERSION)
|
|
throw new RangeError("Version number out of range");
|
|
let result = (16 * ver + 128) * ver + 64;
|
|
if (ver >= 2) {
|
|
const numAlign = Math.floor(ver / 7) + 2;
|
|
result -= (25 * numAlign - 10) * numAlign - 55;
|
|
if (ver >= 7)
|
|
result -= 36;
|
|
}
|
|
return result;
|
|
}
|
|
function getNumDataCodewords(ver, ecl) {
|
|
return Math.floor(getNumRawDataModules(ver) / 8) - ECC_CODEWORDS_PER_BLOCK[ecl[0]][ver] * NUM_ERROR_CORRECTION_BLOCKS[ecl[0]][ver];
|
|
}
|
|
function reedSolomonComputeDivisor(degree) {
|
|
if (degree < 1 || degree > 255)
|
|
throw new RangeError("Degree out of range");
|
|
const result = [];
|
|
for (let i = 0; i < degree - 1; i++)
|
|
result.push(0);
|
|
result.push(1);
|
|
let root = 1;
|
|
for (let i = 0; i < degree; i++) {
|
|
for (let j = 0; j < result.length; j++) {
|
|
result[j] = reedSolomonMultiply(result[j], root);
|
|
if (j + 1 < result.length)
|
|
result[j] ^= result[j + 1];
|
|
}
|
|
root = reedSolomonMultiply(root, 2);
|
|
}
|
|
return result;
|
|
}
|
|
function reedSolomonComputeRemainder(data, divisor) {
|
|
const result = divisor.map((_) => 0);
|
|
for (const b of data) {
|
|
const factor = b ^ result.shift();
|
|
result.push(0);
|
|
divisor.forEach((coef, i) => result[i] ^= reedSolomonMultiply(coef, factor));
|
|
}
|
|
return result;
|
|
}
|
|
function reedSolomonMultiply(x, y) {
|
|
if (x >>> 8 !== 0 || y >>> 8 !== 0)
|
|
throw new RangeError("Byte out of range");
|
|
let z = 0;
|
|
for (let i = 7; i >= 0; i--) {
|
|
z = z << 1 ^ (z >>> 7) * 285;
|
|
z ^= (y >>> i & 1) * x;
|
|
}
|
|
return z;
|
|
}
|
|
function encodeSegments(segs, ecl, minVersion = 1, maxVersion = 40, mask = -1, boostEcl = true) {
|
|
if (!(MIN_VERSION <= minVersion && minVersion <= maxVersion && maxVersion <= MAX_VERSION) || mask < -1 || mask > 7)
|
|
throw new RangeError("Invalid value");
|
|
let version;
|
|
let dataUsedBits;
|
|
for (version = minVersion; ; version++) {
|
|
const dataCapacityBits2 = getNumDataCodewords(version, ecl) * 8;
|
|
const usedBits = getTotalBits(segs, version);
|
|
if (usedBits <= dataCapacityBits2) {
|
|
dataUsedBits = usedBits;
|
|
break;
|
|
}
|
|
if (version >= maxVersion)
|
|
throw new RangeError("Data too long");
|
|
}
|
|
for (const newEcl of [MEDIUM, QUARTILE, HIGH]) {
|
|
if (boostEcl && dataUsedBits <= getNumDataCodewords(version, newEcl) * 8)
|
|
ecl = newEcl;
|
|
}
|
|
const bb = [];
|
|
for (const seg of segs) {
|
|
appendBits(seg.mode[0], 4, bb);
|
|
appendBits(seg.numChars, numCharCountBits(seg.mode, version), bb);
|
|
for (const b of seg.getData())
|
|
bb.push(b);
|
|
}
|
|
const dataCapacityBits = getNumDataCodewords(version, ecl) * 8;
|
|
appendBits(0, Math.min(4, dataCapacityBits - bb.length), bb);
|
|
appendBits(0, (8 - bb.length % 8) % 8, bb);
|
|
for (let padByte = 236; bb.length < dataCapacityBits; padByte ^= 236 ^ 17)
|
|
appendBits(padByte, 8, bb);
|
|
const dataCodewords = Array.from({ length: Math.ceil(bb.length / 8) }, () => 0);
|
|
bb.forEach((b, i) => dataCodewords[i >>> 3] |= b << 7 - (i & 7));
|
|
return new QrCode(version, ecl, dataCodewords, mask);
|
|
}
|
|
|
|
function encode(data, options) {
|
|
const {
|
|
ecc = "L",
|
|
boostEcc = false,
|
|
minVersion = 1,
|
|
maxVersion = 40,
|
|
maskPattern = -1,
|
|
border = 1
|
|
} = options || {};
|
|
const segment = typeof data === "string" ? makeSegments(data) : Array.isArray(data) ? [makeBytes(data)] : void 0;
|
|
if (!segment)
|
|
throw new Error(`uqr only supports encoding string and binary data, but got: ${typeof data}`);
|
|
const qr = encodeSegments(
|
|
segment,
|
|
EccMap[ecc],
|
|
minVersion,
|
|
maxVersion,
|
|
maskPattern,
|
|
boostEcc
|
|
);
|
|
const result = addBorder({
|
|
version: qr.version,
|
|
maskPattern: qr.mask,
|
|
size: qr.size,
|
|
data: qr.modules,
|
|
types: qr.types
|
|
}, border);
|
|
if (options?.invert)
|
|
result.data = result.data.map((row) => row.map((mod) => !mod));
|
|
options?.onEncoded?.(result);
|
|
return result;
|
|
}
|
|
function addBorder(input, border = 1) {
|
|
if (!border)
|
|
return input;
|
|
const { size } = input;
|
|
const newSize = size + border * 2;
|
|
input.size = newSize;
|
|
input.data.forEach((row) => {
|
|
for (let i = 0; i < border; i++) {
|
|
row.unshift(false);
|
|
row.push(false);
|
|
}
|
|
});
|
|
for (let i = 0; i < border; i++) {
|
|
input.data.unshift(Array.from({ length: newSize }, (_) => false));
|
|
input.data.push(Array.from({ length: newSize }, (_) => false));
|
|
}
|
|
const b = QrCodeDataType.Border;
|
|
input.types.forEach((row) => {
|
|
for (let i = 0; i < border; i++) {
|
|
row.unshift(b);
|
|
row.push(b);
|
|
}
|
|
});
|
|
for (let i = 0; i < border; i++) {
|
|
input.types.unshift(Array.from({ length: newSize }, (_) => b));
|
|
input.types.push(Array.from({ length: newSize }, (_) => b));
|
|
}
|
|
return input;
|
|
}
|
|
function getDataAt(data, x, y, defaults = false) {
|
|
if (x < 0 || y < 0 || x >= data.length || y >= data.length)
|
|
return defaults;
|
|
return data[y][x];
|
|
}
|
|
|
|
function renderUnicode(data, options = {}) {
|
|
const {
|
|
whiteChar = "\u2588",
|
|
blackChar = "\u2591"
|
|
} = options;
|
|
const result = encode(data, options);
|
|
return result.data.map((row) => {
|
|
return row.map((mod) => mod ? blackChar : whiteChar).join("");
|
|
}).join("\n");
|
|
}
|
|
function renderANSI(data, options = {}) {
|
|
return renderUnicode(data, {
|
|
...options,
|
|
blackChar: "\x1B[40m\u3000\x1B[0m",
|
|
whiteChar: "\x1B[47m\u3000\x1B[0m"
|
|
});
|
|
}
|
|
function renderUnicodeCompact(data, options = {}) {
|
|
const platte = {
|
|
WHITE_ALL: "\u2588",
|
|
WHITE_BLACK: "\u2580",
|
|
BLACK_WHITE: "\u2584",
|
|
BLACK_ALL: " "
|
|
};
|
|
const result = encode(data, options);
|
|
const WHITE = false;
|
|
const BLACK = true;
|
|
const at = (x, y) => getDataAt(result.data, x, y, true);
|
|
const lines = [];
|
|
let line = "";
|
|
for (let row = 0; row < result.size; row += 2) {
|
|
for (let col = 0; col < result.size; col++) {
|
|
if (at(col, row) === WHITE && at(col, row + 1) === WHITE)
|
|
line += platte.WHITE_ALL;
|
|
else if (at(col, row) === WHITE && at(col, row + 1) === BLACK)
|
|
line += platte.WHITE_BLACK;
|
|
else if (at(col, row) === BLACK && at(col, row + 1) === WHITE)
|
|
line += platte.BLACK_WHITE;
|
|
else
|
|
line += platte.BLACK_ALL;
|
|
}
|
|
lines.push(line);
|
|
line = "";
|
|
}
|
|
return lines.join("\n");
|
|
}
|
|
|
|
function renderSVG(data, options = {}) {
|
|
const result = encode(data, options);
|
|
const {
|
|
pixelSize = 10,
|
|
whiteColor = "white",
|
|
blackColor = "black"
|
|
} = options;
|
|
const height = result.size * pixelSize;
|
|
const width = result.size * pixelSize;
|
|
let svg = `<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 ${width} ${height}">`;
|
|
const pathes = [];
|
|
for (let row = 0; row < result.size; row++) {
|
|
for (let col = 0; col < result.size; col++) {
|
|
const x = col * pixelSize;
|
|
const y = row * pixelSize;
|
|
if (result.data[row][col])
|
|
pathes.push(`M${x},${y}h${pixelSize}v${pixelSize}h-${pixelSize}z`);
|
|
}
|
|
}
|
|
svg += `<rect fill="${whiteColor}" width="${width}" height="${height}"/>`;
|
|
svg += `<path fill="${blackColor}" d="${pathes.join("")}"/>`;
|
|
svg += "</svg>";
|
|
return svg;
|
|
}
|
|
|
|
exports.QrCodeDataType = QrCodeDataType;
|
|
exports.encode = encode;
|
|
exports.renderANSI = renderANSI;
|
|
exports.renderSVG = renderSVG;
|
|
exports.renderUnicode = renderUnicode;
|
|
exports.renderUnicodeCompact = renderUnicodeCompact;
|