@zxing/library
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TypeScript port of ZXing multi-format 1D/2D barcode image processing library.
107 lines (106 loc) • 4.53 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.
*/
import IllegalArgumentException from '../../IllegalArgumentException';
export var ModeValues;
(function (ModeValues) {
ModeValues[ModeValues["TERMINATOR"] = 0] = "TERMINATOR";
ModeValues[ModeValues["NUMERIC"] = 1] = "NUMERIC";
ModeValues[ModeValues["ALPHANUMERIC"] = 2] = "ALPHANUMERIC";
ModeValues[ModeValues["STRUCTURED_APPEND"] = 3] = "STRUCTURED_APPEND";
ModeValues[ModeValues["BYTE"] = 4] = "BYTE";
ModeValues[ModeValues["ECI"] = 5] = "ECI";
ModeValues[ModeValues["KANJI"] = 6] = "KANJI";
ModeValues[ModeValues["FNC1_FIRST_POSITION"] = 7] = "FNC1_FIRST_POSITION";
ModeValues[ModeValues["FNC1_SECOND_POSITION"] = 8] = "FNC1_SECOND_POSITION";
/** See GBT 18284-2000; "Hanzi" is a transliteration of this mode name. */
ModeValues[ModeValues["HANZI"] = 9] = "HANZI";
})(ModeValues || (ModeValues = {}));
/**
* <p>See ISO 18004:2006, 6.4.1, Tables 2 and 3. This enum encapsulates the various modes in which
* data can be encoded to bits in the QR code standard.</p>
*
* @author Sean Owen
*/
export default class Mode {
constructor(value, stringValue, characterCountBitsForVersions, bits /*int*/) {
this.value = value;
this.stringValue = stringValue;
this.characterCountBitsForVersions = characterCountBitsForVersions;
this.bits = bits;
Mode.FOR_BITS.set(bits, this);
Mode.FOR_VALUE.set(value, this);
}
/**
* @param bits four bits encoding a QR Code data mode
* @return Mode encoded by these bits
* @throws IllegalArgumentException if bits do not correspond to a known mode
*/
static forBits(bits /*int*/) {
const mode = Mode.FOR_BITS.get(bits);
if (undefined === mode) {
throw new IllegalArgumentException();
}
return mode;
}
/**
* @param version version in question
* @return number of bits used, in this QR Code symbol {@link Version}, to encode the
* count of characters that will follow encoded in this Mode
*/
getCharacterCountBits(version) {
const versionNumber = version.getVersionNumber();
let offset;
if (versionNumber <= 9) {
offset = 0;
}
else if (versionNumber <= 26) {
offset = 1;
}
else {
offset = 2;
}
return this.characterCountBitsForVersions[offset];
}
getValue() {
return this.value;
}
getBits() {
return this.bits;
}
equals(o) {
if (!(o instanceof Mode)) {
return false;
}
const other = o;
return this.value === other.value;
}
toString() {
return this.stringValue;
}
}
Mode.FOR_BITS = new Map();
Mode.FOR_VALUE = new Map();
Mode.TERMINATOR = new Mode(ModeValues.TERMINATOR, 'TERMINATOR', Int32Array.from([0, 0, 0]), 0x00); // Not really a mode...
Mode.NUMERIC = new Mode(ModeValues.NUMERIC, 'NUMERIC', Int32Array.from([10, 12, 14]), 0x01);
Mode.ALPHANUMERIC = new Mode(ModeValues.ALPHANUMERIC, 'ALPHANUMERIC', Int32Array.from([9, 11, 13]), 0x02);
Mode.STRUCTURED_APPEND = new Mode(ModeValues.STRUCTURED_APPEND, 'STRUCTURED_APPEND', Int32Array.from([0, 0, 0]), 0x03); // Not supported
Mode.BYTE = new Mode(ModeValues.BYTE, 'BYTE', Int32Array.from([8, 16, 16]), 0x04);
Mode.ECI = new Mode(ModeValues.ECI, 'ECI', Int32Array.from([0, 0, 0]), 0x07); // character counts don't apply
Mode.KANJI = new Mode(ModeValues.KANJI, 'KANJI', Int32Array.from([8, 10, 12]), 0x08);
Mode.FNC1_FIRST_POSITION = new Mode(ModeValues.FNC1_FIRST_POSITION, 'FNC1_FIRST_POSITION', Int32Array.from([0, 0, 0]), 0x05);
Mode.FNC1_SECOND_POSITION = new Mode(ModeValues.FNC1_SECOND_POSITION, 'FNC1_SECOND_POSITION', Int32Array.from([0, 0, 0]), 0x09);
/** See GBT 18284-2000; "Hanzi" is a transliteration of this mode name. */
Mode.HANZI = new Mode(ModeValues.HANZI, 'HANZI', Int32Array.from([8, 10, 12]), 0x0D);