@zxing/library
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TypeScript port of ZXing multi-format 1D/2D barcode image processing library.
88 lines (87 loc) • 3.73 kB
JavaScript
/*
* Copyright 2007 ZXing authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/*namespace com.google.zxing.qrcode.decoder {*/
import ArgumentException from '../../ArgumentException';
import IllegalArgumentException from '../../IllegalArgumentException';
export var ErrorCorrectionLevelValues;
(function (ErrorCorrectionLevelValues) {
ErrorCorrectionLevelValues[ErrorCorrectionLevelValues["L"] = 0] = "L";
ErrorCorrectionLevelValues[ErrorCorrectionLevelValues["M"] = 1] = "M";
ErrorCorrectionLevelValues[ErrorCorrectionLevelValues["Q"] = 2] = "Q";
ErrorCorrectionLevelValues[ErrorCorrectionLevelValues["H"] = 3] = "H";
})(ErrorCorrectionLevelValues || (ErrorCorrectionLevelValues = {}));
/**
* <p>See ISO 18004:2006, 6.5.1. This enum encapsulates the four error correction levels
* defined by the QR code standard.</p>
*
* @author Sean Owen
*/
var ErrorCorrectionLevel = /** @class */ (function () {
function ErrorCorrectionLevel(value, stringValue, bits /*int*/) {
this.value = value;
this.stringValue = stringValue;
this.bits = bits;
ErrorCorrectionLevel.FOR_BITS.set(bits, this);
ErrorCorrectionLevel.FOR_VALUE.set(value, this);
}
ErrorCorrectionLevel.prototype.getValue = function () {
return this.value;
};
ErrorCorrectionLevel.prototype.getBits = function () {
return this.bits;
};
ErrorCorrectionLevel.fromString = function (s) {
switch (s) {
case 'L': return ErrorCorrectionLevel.L;
case 'M': return ErrorCorrectionLevel.M;
case 'Q': return ErrorCorrectionLevel.Q;
case 'H': return ErrorCorrectionLevel.H;
default: throw new ArgumentException(s + 'not available');
}
};
ErrorCorrectionLevel.prototype.toString = function () {
return this.stringValue;
};
ErrorCorrectionLevel.prototype.equals = function (o) {
if (!(o instanceof ErrorCorrectionLevel)) {
return false;
}
var other = o;
return this.value === other.value;
};
/**
* @param bits int containing the two bits encoding a QR Code's error correction level
* @return ErrorCorrectionLevel representing the encoded error correction level
*/
ErrorCorrectionLevel.forBits = function (bits /*int*/) {
if (bits < 0 || bits >= ErrorCorrectionLevel.FOR_BITS.size) {
throw new IllegalArgumentException();
}
return ErrorCorrectionLevel.FOR_BITS.get(bits);
};
ErrorCorrectionLevel.FOR_BITS = new Map();
ErrorCorrectionLevel.FOR_VALUE = new Map();
/** L = ~7% correction */
ErrorCorrectionLevel.L = new ErrorCorrectionLevel(ErrorCorrectionLevelValues.L, 'L', 0x01);
/** M = ~15% correction */
ErrorCorrectionLevel.M = new ErrorCorrectionLevel(ErrorCorrectionLevelValues.M, 'M', 0x00);
/** Q = ~25% correction */
ErrorCorrectionLevel.Q = new ErrorCorrectionLevel(ErrorCorrectionLevelValues.Q, 'Q', 0x03);
/** H = ~30% correction */
ErrorCorrectionLevel.H = new ErrorCorrectionLevel(ErrorCorrectionLevelValues.H, 'H', 0x02);
return ErrorCorrectionLevel;
}());
export default ErrorCorrectionLevel;