| /* |
| * Copyright 2006-2007 Jeremias Maerki. |
| * |
| * 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. |
| */ |
| |
| package com.google.zxing.datamatrix.encoder; |
| |
| import com.google.zxing.Dimension; |
| |
| import java.nio.charset.StandardCharsets; |
| |
| final class EncoderContext { |
| |
| private final String msg; |
| private SymbolShapeHint shape; |
| private Dimension minSize; |
| private Dimension maxSize; |
| private final StringBuilder codewords; |
| int pos; |
| private int newEncoding; |
| private SymbolInfo symbolInfo; |
| private int skipAtEnd; |
| |
| EncoderContext(String msg) { |
| //From this point on Strings are not Unicode anymore! |
| byte[] msgBinary = msg.getBytes(StandardCharsets.ISO_8859_1); |
| StringBuilder sb = new StringBuilder(msgBinary.length); |
| for (int i = 0, c = msgBinary.length; i < c; i++) { |
| char ch = (char) (msgBinary[i] & 0xff); |
| if (ch == '?' && msg.charAt(i) != '?') { |
| throw new IllegalArgumentException("Message contains characters outside ISO-8859-1 encoding."); |
| } |
| sb.append(ch); |
| } |
| this.msg = sb.toString(); //Not Unicode here! |
| shape = SymbolShapeHint.FORCE_NONE; |
| this.codewords = new StringBuilder(msg.length()); |
| newEncoding = -1; |
| } |
| |
| public void setSymbolShape(SymbolShapeHint shape) { |
| this.shape = shape; |
| } |
| |
| public void setSizeConstraints(Dimension minSize, Dimension maxSize) { |
| this.minSize = minSize; |
| this.maxSize = maxSize; |
| } |
| |
| public String getMessage() { |
| return this.msg; |
| } |
| |
| public void setSkipAtEnd(int count) { |
| this.skipAtEnd = count; |
| } |
| |
| public char getCurrentChar() { |
| return msg.charAt(pos); |
| } |
| |
| public char getCurrent() { |
| return msg.charAt(pos); |
| } |
| |
| public StringBuilder getCodewords() { |
| return codewords; |
| } |
| |
| public void writeCodewords(String codewords) { |
| this.codewords.append(codewords); |
| } |
| |
| public void writeCodeword(char codeword) { |
| this.codewords.append(codeword); |
| } |
| |
| public int getCodewordCount() { |
| return this.codewords.length(); |
| } |
| |
| public int getNewEncoding() { |
| return newEncoding; |
| } |
| |
| public void signalEncoderChange(int encoding) { |
| this.newEncoding = encoding; |
| } |
| |
| public void resetEncoderSignal() { |
| this.newEncoding = -1; |
| } |
| |
| public boolean hasMoreCharacters() { |
| return pos < getTotalMessageCharCount(); |
| } |
| |
| private int getTotalMessageCharCount() { |
| return msg.length() - skipAtEnd; |
| } |
| |
| public int getRemainingCharacters() { |
| return getTotalMessageCharCount() - pos; |
| } |
| |
| public SymbolInfo getSymbolInfo() { |
| return symbolInfo; |
| } |
| |
| public void updateSymbolInfo() { |
| updateSymbolInfo(getCodewordCount()); |
| } |
| |
| public void updateSymbolInfo(int len) { |
| if (this.symbolInfo == null || len > this.symbolInfo.getDataCapacity()) { |
| this.symbolInfo = SymbolInfo.lookup(len, shape, minSize, maxSize, true); |
| } |
| } |
| |
| public void resetSymbolInfo() { |
| this.symbolInfo = null; |
| } |
| } |