@tjieco/library
Version:
TypeScript port of ZXing multi-format 1D/2D barcode image processing library, with Code128 and ITF support.
95 lines • 4.13 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
var CharacterSetECI_1 = require("./../common/CharacterSetECI");
var Exception_1 = require("./../Exception");
var StringEncoding = /** @class */ (function () {
function StringEncoding() {
}
StringEncoding.decode = function (bytes, encoding) {
var encodingString;
if (typeof encoding === 'string') {
encodingString = encoding;
}
else {
encodingString = encoding.getName();
}
if (StringEncoding.isBrowser()) {
// tslint:disable-next-line:no-string-literal
var TextDecoderBrowser = window['TextDecoder'];
// use TextEncoder if is available (should be in newer browsers)
if (undefined !== TextDecoderBrowser) {
// console.log(TextDecoderBrowser)
return new TextDecoderBrowser(encoding).decode(bytes);
}
else {
// fall back to minimal decoding
return StringEncoding.decodeFallBack(bytes, encodingString);
}
}
else {
var TextDecoderFromTEClass = require('text-encoding').TextDecoder;
return new TextDecoderFromTEClass(encodingString).decode(bytes);
}
};
StringEncoding.encode = function (s, encoding) {
var encodingString;
if (typeof encoding === 'string') {
encodingString = encoding;
}
else {
encodingString = encoding.getName();
}
if (StringEncoding.isBrowser()) {
// tslint:disable-next-line:no-string-literal
var TextEncoderBrowser = window['TextEncoder'];
// use TextEncoder if is available (should be in newer browsers)
var ec = CharacterSetECI_1.default.getCharacterSetECIByName(encodingString);
if (undefined !== TextEncoderBrowser) {
// TODO: TextEncoder only supports utf-8 encoding as per specs
return new TextEncoderBrowser(encoding).encode(s);
}
else {
// fall back to minimal decoding
return StringEncoding.encodeFallBack(s, encodingString);
}
}
else {
// Note: NONSTANDARD_allowLegacyEncoding is required for other encodings than UTF8
// TextEncoder only encodes to UTF8 by default as specified by encoding.spec.whatwg.org
var TextEncoderFromTEClass = require('text-encoding').TextEncoder;
return new TextEncoderFromTEClass(encodingString, { NONSTANDARD_allowLegacyEncoding: true }).encode(s);
}
};
StringEncoding.isBrowser = function () {
return typeof window !== 'undefined' && ({}).toString.call(window) === '[object Window]';
};
StringEncoding.decodeFallBack = function (bytes, encoding) {
var ec = CharacterSetECI_1.default.getCharacterSetECIByName(encoding);
if (ec.equals(CharacterSetECI_1.default.UTF8) ||
ec.equals(CharacterSetECI_1.default.ISO8859_1) ||
ec.equals(CharacterSetECI_1.default.ASCII)) {
var s = '';
for (var i = 0, length_1 = bytes.length; i < length_1; i++) {
var h = bytes[i].toString(16);
if (h.length < 2) {
h = '0' + h;
}
s += '%' + h;
}
return decodeURIComponent(s);
}
else if (ec.equals(CharacterSetECI_1.default.UnicodeBigUnmarked)) {
return String.fromCharCode.apply(null, new Uint16Array(bytes.buffer));
}
else {
throw new Exception_1.default(Exception_1.default.UnsupportedOperationException, "encoding " + encoding + " not supported");
}
};
StringEncoding.encodeFallBack = function (s, encoding) {
// TODO: encode
return null;
};
return StringEncoding;
}());
exports.default = StringEncoding;
//# sourceMappingURL=StringEncoding.js.map