| /* |
| * 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; |
| } |
| } |