702 lines
30 KiB
JavaScript
702 lines
30 KiB
JavaScript
var qrcodegen;
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((qrcodegen2) => {
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const _QrCode = 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, errorCorrectionLevel, dataCodewords, msk) {
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this.version = version;
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this.errorCorrectionLevel = errorCorrectionLevel;
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this.modules = [];
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this.isFunction = [];
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if (version < _QrCode.MIN_VERSION || version > _QrCode.MAX_VERSION)
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throw "Version value out of range";
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if (msk < -1 || msk > 7)
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throw "Mask value out of range";
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this.size = version * 4 + 17;
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const row = [];
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for (let i = 0; i < this.size; i++)
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row.push(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.isFunction.push(row.slice());
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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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assert(0 <= msk && msk <= 7);
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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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this.isFunction = [];
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}
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/*-- Static factory functions (high level) --*/
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// Returns a QR Code representing the given Unicode text string at the given error correction level.
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// As a conservative upper bound, this function is guaranteed to succeed for strings that have 738 or fewer
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// Unicode code points (not UTF-16 code units) if the low error correction level is used. The smallest possible
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// QR Code version is automatically chosen for the output. The ECC level of the result may be higher than the
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// ecl argument if it can be done without increasing the version.
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static encodeText(text, ecl) {
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const segs = qrcodegen2.QrSegment.makeSegments(text);
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return _QrCode.encodeSegments(segs, ecl);
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}
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// Returns a QR Code representing the given binary data at the given error correction level.
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// This function always encodes using the binary segment mode, not any text mode. The maximum number of
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// bytes allowed is 2953. The smallest possible QR Code version is automatically chosen for the output.
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// The ECC level of the result may be higher than the ecl argument if it can be done without increasing the version.
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static encodeBinary(data, ecl) {
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const seg = qrcodegen2.QrSegment.makeBytes(data);
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return _QrCode.encodeSegments([seg], ecl);
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}
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/*-- Static factory functions (mid level) --*/
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// Returns a QR Code representing the given segments with the given encoding parameters.
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// The smallest possible QR Code version within the given range is automatically
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// chosen for the output. Iff boostEcl is true, then the ECC level of the result
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// may be higher than the ecl argument if it can be done without increasing the
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// version. The mask number is either between 0 to 7 (inclusive) to force that
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// mask, or -1 to automatically choose an appropriate mask (which may be slow).
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// This function allows the user to create a custom sequence of segments that switches
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// between modes (such as alphanumeric and byte) to encode text in less space.
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// This is a mid-level API; the high-level API is encodeText() and encodeBinary().
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static encodeSegments(segs, ecl, minVersion = 1, maxVersion = 40, mask = -1, boostEcl = true) {
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if (!(_QrCode.MIN_VERSION <= minVersion && minVersion <= maxVersion && maxVersion <= _QrCode.MAX_VERSION) || mask < -1 || mask > 7)
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throw "Invalid value";
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let version;
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let dataUsedBits;
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for (version = minVersion; ; version++) {
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const dataCapacityBits2 = _QrCode.getNumDataCodewords(version, ecl) * 8;
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const usedBits = QrSegment.getTotalBits(segs, version);
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if (usedBits <= dataCapacityBits2) {
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dataUsedBits = usedBits;
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break;
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}
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if (version >= maxVersion)
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throw "Data too long";
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}
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for (const newEcl of [_QrCode.Ecc.MEDIUM, _QrCode.Ecc.QUARTILE, _QrCode.Ecc.HIGH]) {
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if (boostEcl && dataUsedBits <= _QrCode.getNumDataCodewords(version, newEcl) * 8)
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ecl = newEcl;
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}
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const bb = [];
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for (const seg of segs) {
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appendBits(seg.mode.modeBits, 4, bb);
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appendBits(seg.numChars, seg.mode.numCharCountBits(version), bb);
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for (const b of seg.getData())
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bb.push(b);
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}
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assert(bb.length == dataUsedBits);
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const dataCapacityBits = _QrCode.getNumDataCodewords(version, ecl) * 8;
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assert(bb.length <= dataCapacityBits);
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appendBits(0, Math.min(4, dataCapacityBits - bb.length), bb);
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appendBits(0, (8 - bb.length % 8) % 8, bb);
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assert(bb.length % 8 == 0);
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for (let padByte = 236; bb.length < dataCapacityBits; padByte ^= 236 ^ 17)
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appendBits(padByte, 8, bb);
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const dataCodewords = [];
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while (dataCodewords.length * 8 < bb.length)
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dataCodewords.push(0);
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bb.forEach((b, i) => dataCodewords[i >>> 3] |= b << 7 - (i & 7));
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return new _QrCode(version, ecl, dataCodewords, mask);
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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 0 <= x && x < this.size && 0 <= y && 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);
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this.setFunctionModule(i, 6, i % 2 == 0);
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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.errorCorrectionLevel.formatBits << 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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assert(bits >>> 15 == 0);
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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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assert(bits >>> 18 == 0);
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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 (0 <= xx && xx < this.size && 0 <= yy && yy < this.size)
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this.setFunctionModule(xx, yy, dist != 2 && dist != 4);
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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(x + dx, y + dy, Math.max(Math.abs(dx), Math.abs(dy)) != 1);
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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) {
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this.modules[y][x] = isDark;
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this.isFunction[y][x] = true;
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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.errorCorrectionLevel;
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if (data.length != _QrCode.getNumDataCodewords(ver, ecl))
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throw "Invalid argument";
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const numBlocks = _QrCode.NUM_ERROR_CORRECTION_BLOCKS[ecl.ordinal][ver];
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const blockEccLen = _QrCode.ECC_CODEWORDS_PER_BLOCK[ecl.ordinal][ver];
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const rawCodewords = Math.floor(_QrCode.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 = _QrCode.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 = _QrCode.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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assert(result.length == rawCodewords);
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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(_QrCode.getNumRawDataModules(this.version) / 8))
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throw "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.isFunction[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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assert(i == data.length * 8);
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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 "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 "Unreachable";
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}
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if (!this.isFunction[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 += _QrCode.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) * _QrCode.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) * _QrCode.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 += _QrCode.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) * _QrCode.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) * _QrCode.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 += _QrCode.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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assert(0 <= k && k <= 9);
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result += k * _QrCode.PENALTY_N4;
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assert(0 <= result && result <= 2568888);
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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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// Returns the number of data bits that can be stored in a QR Code of the given version number, after
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// all function modules are excluded. This includes remainder bits, so it might not be a multiple of 8.
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// The result is in the range [208, 29648]. This could be implemented as a 40-entry lookup table.
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static getNumRawDataModules(ver) {
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if (ver < _QrCode.MIN_VERSION || ver > _QrCode.MAX_VERSION)
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throw "Version number out of range";
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let result = (16 * ver + 128) * ver + 64;
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if (ver >= 2) {
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const numAlign = Math.floor(ver / 7) + 2;
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result -= (25 * numAlign - 10) * numAlign - 55;
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if (ver >= 7)
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result -= 36;
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}
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assert(208 <= result && result <= 29648);
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return result;
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}
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// Returns the number of 8-bit data (i.e. not error correction) codewords contained in any
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// QR Code of the given version number and error correction level, with remainder bits discarded.
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// This stateless pure function could be implemented as a (40*4)-cell lookup table.
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static getNumDataCodewords(ver, ecl) {
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return Math.floor(_QrCode.getNumRawDataModules(ver) / 8) - _QrCode.ECC_CODEWORDS_PER_BLOCK[ecl.ordinal][ver] * _QrCode.NUM_ERROR_CORRECTION_BLOCKS[ecl.ordinal][ver];
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}
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// Returns a Reed-Solomon ECC generator polynomial for the given degree. This could be
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// implemented as a lookup table over all possible parameter values, instead of as an algorithm.
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static reedSolomonComputeDivisor(degree) {
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if (degree < 1 || degree > 255)
|
|
throw "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] = _QrCode.reedSolomonMultiply(result[j], root);
|
|
if (j + 1 < result.length)
|
|
result[j] ^= result[j + 1];
|
|
}
|
|
root = _QrCode.reedSolomonMultiply(root, 2);
|
|
}
|
|
return result;
|
|
}
|
|
// Returns the Reed-Solomon error correction codeword for the given data and divisor polynomials.
|
|
static 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] ^= _QrCode.reedSolomonMultiply(coef, factor));
|
|
}
|
|
return result;
|
|
}
|
|
// Returns the product of the two given field elements modulo GF(2^8/0x11D). The arguments and result
|
|
// are unsigned 8-bit integers. This could be implemented as a lookup table of 256*256 entries of uint8.
|
|
static reedSolomonMultiply(x, y) {
|
|
if (x >>> 8 != 0 || y >>> 8 != 0)
|
|
throw "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;
|
|
}
|
|
assert(z >>> 8 == 0);
|
|
return z;
|
|
}
|
|
// Can only be called immediately after a light run is added, and
|
|
// returns either 0, 1, or 2. A helper function for getPenaltyScore().
|
|
finderPenaltyCountPatterns(runHistory) {
|
|
const n = runHistory[1];
|
|
assert(n <= this.size * 3);
|
|
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);
|
|
}
|
|
};
|
|
_QrCode.MIN_VERSION = 1;
|
|
_QrCode.MAX_VERSION = 40;
|
|
_QrCode.PENALTY_N1 = 3;
|
|
_QrCode.PENALTY_N2 = 3;
|
|
_QrCode.PENALTY_N3 = 40;
|
|
_QrCode.PENALTY_N4 = 10;
|
|
_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
|
|
];
|
|
_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
|
|
];
|
|
let QrCode = _QrCode;
|
|
qrcodegen2.QrCode = QrCode;
|
|
function appendBits(val, len, bb) {
|
|
if (len < 0 || len > 31 || val >>> len != 0)
|
|
throw "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;
|
|
}
|
|
function assert(cond) {
|
|
if (!cond)
|
|
throw "Assertion error";
|
|
}
|
|
const _QrSegment = class _QrSegment {
|
|
/*-- Constructor (low level) and fields --*/
|
|
// 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 "Invalid argument";
|
|
this.bitData = bitData.slice();
|
|
}
|
|
/*-- 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.
|
|
static makeBytes(data) {
|
|
const bb = [];
|
|
for (const b of data)
|
|
appendBits(b, 8, bb);
|
|
return new _QrSegment(_QrSegment.Mode.BYTE, data.length, bb);
|
|
}
|
|
// Returns a segment representing the given string of decimal digits encoded in numeric mode.
|
|
static makeNumeric(digits) {
|
|
if (!_QrSegment.isNumeric(digits))
|
|
throw "String contains non-numeric characters";
|
|
const bb = [];
|
|
for (let i = 0; i < digits.length; ) {
|
|
const n = Math.min(digits.length - i, 3);
|
|
appendBits(parseInt(digits.substr(i, n), 10), n * 3 + 1, bb);
|
|
i += n;
|
|
}
|
|
return new _QrSegment(_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.
|
|
static makeAlphanumeric(text) {
|
|
if (!_QrSegment.isAlphanumeric(text))
|
|
throw "String contains unencodable characters in alphanumeric mode";
|
|
const bb = [];
|
|
let i;
|
|
for (i = 0; i + 2 <= text.length; i += 2) {
|
|
let 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)
|
|
appendBits(_QrSegment.ALPHANUMERIC_CHARSET.indexOf(text.charAt(i)), 6, bb);
|
|
return new _QrSegment(_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.
|
|
static makeSegments(text) {
|
|
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.
|
|
static makeEci(assignVal) {
|
|
const bb = [];
|
|
if (assignVal < 0)
|
|
throw "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 < 1e6) {
|
|
appendBits(6, 3, bb);
|
|
appendBits(assignVal, 21, bb);
|
|
} else
|
|
throw "ECI assignment value out of range";
|
|
return new _QrSegment(_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.
|
|
static 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.
|
|
static isAlphanumeric(text) {
|
|
return _QrSegment.ALPHANUMERIC_REGEX.test(text);
|
|
}
|
|
/*-- Methods --*/
|
|
// Returns a new copy of the data bits of this segment.
|
|
getData() {
|
|
return this.bitData.slice();
|
|
}
|
|
// (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.
|
|
static getTotalBits(segs, version) {
|
|
let result = 0;
|
|
for (const seg of segs) {
|
|
const ccbits = seg.mode.numCharCountBits(version);
|
|
if (seg.numChars >= 1 << ccbits)
|
|
return Infinity;
|
|
result += 4 + ccbits + seg.bitData.length;
|
|
}
|
|
return result;
|
|
}
|
|
// Returns a new array of bytes representing the given string encoded in UTF-8.
|
|
static 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(parseInt(str.substr(i + 1, 2), 16));
|
|
i += 2;
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
};
|
|
_QrSegment.NUMERIC_REGEX = /^[0-9]*$/;
|
|
_QrSegment.ALPHANUMERIC_REGEX = /^[A-Z0-9 $%*+.\/:-]*$/;
|
|
_QrSegment.ALPHANUMERIC_CHARSET = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ $%*+-./:";
|
|
let QrSegment = _QrSegment;
|
|
qrcodegen2.QrSegment = QrSegment;
|
|
})(qrcodegen || (qrcodegen = {}));
|
|
((qrcodegen2) => {
|
|
((QrCode2) => {
|
|
const _Ecc = class _Ecc {
|
|
// The QR Code can tolerate about 30% erroneous codewords
|
|
/*-- Constructor and fields --*/
|
|
constructor(ordinal, formatBits) {
|
|
this.ordinal = ordinal;
|
|
this.formatBits = formatBits;
|
|
}
|
|
};
|
|
_Ecc.LOW = new _Ecc(0, 1);
|
|
_Ecc.MEDIUM = new _Ecc(1, 0);
|
|
_Ecc.QUARTILE = new _Ecc(2, 3);
|
|
_Ecc.HIGH = new _Ecc(3, 2);
|
|
let Ecc = _Ecc;
|
|
QrCode2.Ecc = Ecc;
|
|
})(qrcodegen2.QrCode || (qrcodegen2.QrCode = {}));
|
|
})(qrcodegen || (qrcodegen = {}));
|
|
((qrcodegen2) => {
|
|
((QrSegment2) => {
|
|
const _Mode = class _Mode {
|
|
/*-- Constructor and fields --*/
|
|
constructor(modeBits, numBitsCharCount) {
|
|
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].
|
|
numCharCountBits(ver) {
|
|
return this.numBitsCharCount[Math.floor((ver + 7) / 17)];
|
|
}
|
|
};
|
|
_Mode.NUMERIC = new _Mode(1, [10, 12, 14]);
|
|
_Mode.ALPHANUMERIC = new _Mode(2, [9, 11, 13]);
|
|
_Mode.BYTE = new _Mode(4, [8, 16, 16]);
|
|
_Mode.KANJI = new _Mode(8, [8, 10, 12]);
|
|
_Mode.ECI = new _Mode(7, [0, 0, 0]);
|
|
let Mode = _Mode;
|
|
QrSegment2.Mode = Mode;
|
|
})(qrcodegen2.QrSegment || (qrcodegen2.QrSegment = {}));
|
|
})(qrcodegen || (qrcodegen = {}));
|
|
export {
|
|
qrcodegen
|
|
};
|