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/*
* Copyright (C) 2014 The Android Open Source Project
*
* 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.android.calculator2;
import android.content.Context;
import java.text.DecimalFormat;
import java.text.DecimalFormatSymbols;
import java.text.NumberFormat;
import java.util.HashMap;
import java.util.Locale;
import java.util.Map;
import java.util.Map.Entry;
public class CalculatorExpressionTokenizer {
private final Map<String, String> mReplacementMap;
public CalculatorExpressionTokenizer(Context context) {
mReplacementMap = new HashMap<>();
Locale locale = context.getResources().getConfiguration().locale;
if (!context.getResources().getBoolean(R.bool.use_localized_digits)) {
locale = new Locale.Builder()
.setLocale(locale)
.setUnicodeLocaleKeyword("nu", "latn")
.build();
}
final DecimalFormatSymbols symbols = new DecimalFormatSymbols(locale);
final char zeroDigit = symbols.getZeroDigit();
mReplacementMap.put(".", String.valueOf(symbols.getDecimalSeparator()));
for (int i = 0; i <= 9; ++i) {
mReplacementMap.put(Integer.toString(i), String.valueOf((char) (i + zeroDigit)));
}
mReplacementMap.put("/", context.getString(R.string.op_div));
mReplacementMap.put("*", context.getString(R.string.op_mul));
mReplacementMap.put("-", context.getString(R.string.op_sub));
mReplacementMap.put("cos", context.getString(R.string.fun_cos));
mReplacementMap.put("ln", context.getString(R.string.fun_ln));
mReplacementMap.put("log", context.getString(R.string.fun_log));
mReplacementMap.put("sin", context.getString(R.string.fun_sin));
mReplacementMap.put("tan", context.getString(R.string.fun_tan));
mReplacementMap.put("Infinity", context.getString(R.string.inf));
}
public String getNormalizedExpression(String expr) {
for (Entry<String, String> replacementEntry : mReplacementMap.entrySet()) {
expr = expr.replace(replacementEntry.getValue(), replacementEntry.getKey());
}
return expr;
}
public String getLocalizedExpression(String expr) {
for (Entry<String, String> replacementEntry : mReplacementMap.entrySet()) {
expr = expr.replace(replacementEntry.getKey(), replacementEntry.getValue());
}
return expr;
}
}
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