widget-code-zb
Version:
中百二维码组件
296 lines (292 loc) • 10.9 kB
JavaScript
import QR8bitByte from './QR8bitByte.js';
import QRBitBuffer from './QRBitBuffer.js';
import QRPolynomial from './QRPolynomial.js';
import QRRSBlock from './QRRSBlock.js';
import QRUtil from './QRUtil.js';
function QRCodeModel(typeNumber, errorCorrectLevel) {
this.typeNumber = typeNumber;
this.errorCorrectLevel = errorCorrectLevel;
this.modules = null;
this.moduleCount = 0;
this.dataCache = null;
this.dataList = [];
}
QRCodeModel.prototype = {
addData: function(data) {
let newData = new QR8bitByte(data);
this.dataList.push(newData);
this.dataCache = null;
},
isDark: function(row, col) {
if (row < 0 || this.moduleCount <= row || col < 0 || this.moduleCount <= col) {
throw new Error(row + "," + col);
}
return this.modules[row][col];
},
getModuleCount: function() {
return this.moduleCount;
},
make: function() {
this.makeImpl(false, this.getBestMaskPattern());
},
makeImpl: function(test, maskPattern) {
this.moduleCount = this.typeNumber * 4 + 17;
this.modules = new Array(this.moduleCount);
for (let row = 0; row < this.moduleCount; row++) {
this.modules[row] = new Array(this.moduleCount);
for (let col = 0; col < this.moduleCount; col++) {
this.modules[row][col] = null;
}
}
this.setupPositionProbePattern(0, 0);
this.setupPositionProbePattern(this.moduleCount - 7, 0);
this.setupPositionProbePattern(0, this.moduleCount - 7);
this.setupPositionAdjustPattern();
this.setupTimingPattern();
this.setupTypeInfo(test, maskPattern);
if (this.typeNumber >= 7) {
this.setupTypeNumber(test);
}
if (this.dataCache == null) {
this.dataCache = QRCodeModel.createData(this.typeNumber, this.errorCorrectLevel, this.dataList);
}
this.mapData(this.dataCache, maskPattern);
},
setupPositionProbePattern: function(row, col) {
for (let r = -1; r <= 7; r++) {
if (row + r <= -1 || this.moduleCount <= row + r) continue;
for (let c = -1; c <= 7; c++) {
if (col + c <= -1 || this.moduleCount <= col + c) continue;
if ((0 <= r && r <= 6 && (c == 0 || c == 6)) || (0 <= c && c <= 6 && (r == 0 || r == 6)) || (2 <= r && r <= 4 && 2 <= c && c <= 4)) {
this.modules[row + r][col + c] = true;
} else {
this.modules[row + r][col + c] = false;
}
}
}
},
getBestMaskPattern: function() {
let minLostPoint = 0;
let pattern = 0;
for (let i = 0; i < 8; i++) {
this.makeImpl(true, i);
let lostPoint = QRUtil.getLostPoint(this);
if (i == 0 || minLostPoint > lostPoint) {
minLostPoint = lostPoint;
pattern = i;
}
}
return pattern;
},
createMovieClip: function(target_mc, instance_name, depth) {
let qr_mc = target_mc.createEmptyMovieClip(instance_name, depth);
let cs = 1;
this.make();
for (let row = 0; row < this.modules.length; row++) {
let y = row * cs;
for (let col = 0; col < this.modules[row].length; col++) {
let x = col * cs;
let dark = this.modules[row][col];
if (dark) {
qr_mc.beginFill(0, 100);
qr_mc.moveTo(x, y);
qr_mc.lineTo(x + cs, y);
qr_mc.lineTo(x + cs, y + cs);
qr_mc.lineTo(x, y + cs);
qr_mc.endFill();
}
}
}
return qr_mc;
},
setupTimingPattern: function() {
for (let r = 8; r < this.moduleCount - 8; r++) {
if (this.modules[r][6] != null) {
continue;
}
this.modules[r][6] = (r % 2 == 0);
}
for (let c = 8; c < this.moduleCount - 8; c++) {
if (this.modules[6][c] != null) {
continue;
}
this.modules[6][c] = (c % 2 == 0);
}
},
setupPositionAdjustPattern: function() {
let pos = QRUtil.getPatternPosition(this.typeNumber);
for (let i = 0; i < pos.length; i++) {
for (let j = 0; j < pos.length; j++) {
let row = pos[i];
let col = pos[j];
if (this.modules[row][col] != null) {
continue;
}
for (let r = -2; r <= 2; r++) {
for (let c = -2; c <= 2; c++) {
if (r == -2 || r == 2 || c == -2 || c == 2 || (r == 0 && c == 0)) {
this.modules[row + r][col + c] = true;
} else {
this.modules[row + r][col + c] = false;
}
}
}
}
}
},
setupTypeNumber: function(test) {
let bits = QRUtil.getBCHTypeNumber(this.typeNumber);
for (let i = 0; i < 18; i++) {
let mod = (!test && ((bits >> i) & 1) == 1);
this.modules[Math.floor(i / 3)][i % 3 + this.moduleCount - 8 - 3] = mod;
}
for (let i = 0; i < 18; i++) {
let mod = (!test && ((bits >> i) & 1) == 1);
this.modules[i % 3 + this.moduleCount - 8 - 3][Math.floor(i / 3)] = mod;
}
},
setupTypeInfo: function(test, maskPattern) {
let data = (this.errorCorrectLevel << 3) | maskPattern;
let bits = QRUtil.getBCHTypeInfo(data);
for (let i = 0; i < 15; i++) {
let mod = (!test && ((bits >> i) & 1) == 1);
if (i < 6) {
this.modules[i][8] = mod;
} else if (i < 8) {
this.modules[i + 1][8] = mod;
} else {
this.modules[this.moduleCount - 15 + i][8] = mod;
}
}
for (let i = 0; i < 15; i++) {
let mod = (!test && ((bits >> i) & 1) == 1);
if (i < 8) {
this.modules[8][this.moduleCount - i - 1] = mod;
} else if (i < 9) {
this.modules[8][15 - i - 1 + 1] = mod;
} else {
this.modules[8][15 - i - 1] = mod;
}
}
this.modules[this.moduleCount - 8][8] = (!test);
},
mapData: function(data, maskPattern) {
let inc = -1;
let row = this.moduleCount - 1;
let bitIndex = 7;
let byteIndex = 0;
for (let col = this.moduleCount - 1; col > 0; col -= 2) {
if (col == 6) col--;
while (true) {
for (let c = 0; c < 2; c++) {
if (this.modules[row][col - c] == null) {
let dark = false;
if (byteIndex < data.length) {
dark = (((data[byteIndex] >>> bitIndex) & 1) == 1);
}
let mask = QRUtil.getMask(maskPattern, row, col - c);
if (mask) {
dark = !dark;
}
this.modules[row][col - c] = dark;
bitIndex--;
if (bitIndex == -1) {
byteIndex++;
bitIndex = 7;
}
}
}
row += inc;
if (row < 0 || this.moduleCount <= row) {
row -= inc;
inc = -inc;
break;
}
}
}
}
};
QRCodeModel.PAD0 = 0xEC;
QRCodeModel.PAD1 = 0x11;
QRCodeModel.createData = function(typeNumber, errorCorrectLevel, dataList) {
let rsBlocks = QRRSBlock.getRSBlocks(typeNumber, errorCorrectLevel);
let buffer = new QRBitBuffer();
for (let i = 0; i < dataList.length; i++) {
let data = dataList[i];
buffer.put(data.mode, 4);
buffer.put(data.getLength(), QRUtil.getLengthInBits(data.mode, typeNumber));
data.write(buffer);
}
let totalDataCount = 0;
for (let i = 0; i < rsBlocks.length; i++) {
totalDataCount += rsBlocks[i].dataCount;
}
if (buffer.getLengthInBits() > totalDataCount * 8) {
throw new Error("code length overflow. (" + buffer.getLengthInBits() + ">" + totalDataCount * 8 + ")");
}
if (buffer.getLengthInBits() + 4 <= totalDataCount * 8) {
buffer.put(0, 4);
}
while (buffer.getLengthInBits() % 8 != 0) {
buffer.putBit(false);
}
while (true) {
if (buffer.getLengthInBits() >= totalDataCount * 8) {
break;
}
buffer.put(QRCodeModel.PAD0, 8);
if (buffer.getLengthInBits() >= totalDataCount * 8) {
break;
}
buffer.put(QRCodeModel.PAD1, 8);
}
return QRCodeModel.createBytes(buffer, rsBlocks);
};
QRCodeModel.createBytes = function(buffer, rsBlocks) {
let offset = 0;
let maxDcCount = 0;
let maxEcCount = 0;
let dcdata = new Array(rsBlocks.length);
let ecdata = new Array(rsBlocks.length);
for (let r = 0; r < rsBlocks.length; r++) {
let dcCount = rsBlocks[r].dataCount;
let ecCount = rsBlocks[r].totalCount - dcCount;
maxDcCount = Math.max(maxDcCount, dcCount);
maxEcCount = Math.max(maxEcCount, ecCount);
dcdata[r] = new Array(dcCount);
for (let i = 0; i < dcdata[r].length; i++) {
dcdata[r][i] = 0xff & buffer.buffer[i + offset];
}
offset += dcCount;
let rsPoly = QRUtil.getErrorCorrectPolynomial(ecCount);
let rawPoly = new QRPolynomial(dcdata[r], rsPoly.getLength() - 1);
let modPoly = rawPoly.mod(rsPoly);
ecdata[r] = new Array(rsPoly.getLength() - 1);
for (let i = 0; i < ecdata[r].length; i++) {
let modIndex = i + modPoly.getLength() - ecdata[r].length;
ecdata[r][i] = (modIndex >= 0) ? modPoly.get(modIndex) : 0;
}
}
let totalCodeCount = 0;
for (let i = 0; i < rsBlocks.length; i++) {
totalCodeCount += rsBlocks[i].totalCount;
}
let data = new Array(totalCodeCount);
let index = 0;
for (let i = 0; i < maxDcCount; i++) {
for (let r = 0; r < rsBlocks.length; r++) {
if (i < dcdata[r].length) {
data[index++] = dcdata[r][i];
}
}
}
for (let i = 0; i < maxEcCount; i++) {
for (let r = 0; r < rsBlocks.length; r++) {
if (i < ecdata[r].length) {
data[index++] = ecdata[r][i];
}
}
}
return data;
};
export default QRCodeModel;