import StringBuilder from '../../util/StringBuilder';
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import SymbolInfo from './SymbolInfo';
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export class EncoderContext {
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constructor(msg) {
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this.msg = msg;
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this.pos = 0;
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this.skipAtEnd = 0;
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// From this point on Strings are not Unicode anymore!
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const msgBinary = msg.split('').map(c => c.charCodeAt(0));
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const sb = new StringBuilder();
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for (let i = 0, c = msgBinary.length; i < c; i++) {
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const ch = String.fromCharCode(msgBinary[i] & 0xff);
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if (ch === '?' && msg.charAt(i) !== '?') {
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throw new Error('Message contains characters outside ISO-8859-1 encoding.');
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}
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sb.append(ch);
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}
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this.msg = sb.toString(); // Not Unicode here!
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this.shape = 0 /* FORCE_NONE */;
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this.codewords = new StringBuilder();
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this.newEncoding = -1;
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}
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setSymbolShape(shape) {
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this.shape = shape;
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}
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setSizeConstraints(minSize, maxSize) {
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this.minSize = minSize;
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this.maxSize = maxSize;
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}
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getMessage() {
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return this.msg;
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}
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setSkipAtEnd(count) {
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this.skipAtEnd = count;
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}
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getCurrentChar() {
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return this.msg.charCodeAt(this.pos);
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}
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getCurrent() {
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return this.msg.charCodeAt(this.pos);
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}
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getCodewords() {
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return this.codewords;
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}
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writeCodewords(codewords) {
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this.codewords.append(codewords);
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}
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writeCodeword(codeword) {
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this.codewords.append(codeword);
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}
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getCodewordCount() {
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return this.codewords.length();
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}
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getNewEncoding() {
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return this.newEncoding;
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}
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signalEncoderChange(encoding) {
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this.newEncoding = encoding;
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}
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resetEncoderSignal() {
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this.newEncoding = -1;
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}
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hasMoreCharacters() {
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return this.pos < this.getTotalMessageCharCount();
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}
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getTotalMessageCharCount() {
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return this.msg.length - this.skipAtEnd;
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}
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getRemainingCharacters() {
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return this.getTotalMessageCharCount() - this.pos;
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}
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getSymbolInfo() {
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return this.symbolInfo;
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}
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updateSymbolInfo(len = this.getCodewordCount()) {
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if (this.symbolInfo == null || len > this.symbolInfo.getDataCapacity()) {
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this.symbolInfo = SymbolInfo.lookup(len, this.shape, this.minSize, this.maxSize, true);
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}
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}
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resetSymbolInfo() {
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this.symbolInfo = null;
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}
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}
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