Justin Klaassen | 4b3af05 | 2014-05-27 17:53:10 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2014 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the 'License'); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an 'AS IS' BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | package com.android.calculator2; |
| 18 | |
| 19 | import android.content.Context; |
| 20 | |
Filipe Gonçalves | a12b3cf | 2016-05-31 13:37:26 +0100 | [diff] [blame] | 21 | import java.text.DecimalFormat; |
| 22 | import java.text.DecimalFormatSymbols; |
| 23 | import java.text.NumberFormat; |
Justin Klaassen | 4b3af05 | 2014-05-27 17:53:10 -0700 | [diff] [blame] | 24 | import java.util.HashMap; |
Filipe Gonçalves | a12b3cf | 2016-05-31 13:37:26 +0100 | [diff] [blame] | 25 | import java.util.Locale; |
Justin Klaassen | 4b3af05 | 2014-05-27 17:53:10 -0700 | [diff] [blame] | 26 | import java.util.Map; |
| 27 | import java.util.Map.Entry; |
| 28 | |
| 29 | public class CalculatorExpressionTokenizer { |
Justin Klaassen | 741471e | 2014-06-11 09:43:44 -0700 | [diff] [blame] | 30 | |
Justin Klaassen | 4b3af05 | 2014-05-27 17:53:10 -0700 | [diff] [blame] | 31 | private final Map<String, String> mReplacementMap; |
| 32 | |
Justin Klaassen | 2be4fdb | 2014-08-06 19:54:09 -0700 | [diff] [blame] | 33 | public CalculatorExpressionTokenizer(Context context) { |
Justin Klaassen | 4b3af05 | 2014-05-27 17:53:10 -0700 | [diff] [blame] | 34 | mReplacementMap = new HashMap<>(); |
| 35 | |
Filipe Gonçalves | a12b3cf | 2016-05-31 13:37:26 +0100 | [diff] [blame] | 36 | Locale locale = context.getResources().getConfiguration().locale; |
| 37 | if (!context.getResources().getBoolean(R.bool.use_localized_digits)) { |
| 38 | locale = new Locale.Builder() |
| 39 | .setLocale(locale) |
| 40 | .setUnicodeLocaleKeyword("nu", "latn") |
| 41 | .build(); |
| 42 | } |
Justin Klaassen | 4b3af05 | 2014-05-27 17:53:10 -0700 | [diff] [blame] | 43 | |
Filipe Gonçalves | a12b3cf | 2016-05-31 13:37:26 +0100 | [diff] [blame] | 44 | final DecimalFormatSymbols symbols = new DecimalFormatSymbols(locale); |
| 45 | final char zeroDigit = symbols.getZeroDigit(); |
| 46 | |
| 47 | mReplacementMap.put(".", String.valueOf(symbols.getDecimalSeparator())); |
| 48 | |
| 49 | for (int i = 0; i <= 9; ++i) { |
| 50 | mReplacementMap.put(Integer.toString(i), String.valueOf((char) (i + zeroDigit))); |
| 51 | } |
Justin Klaassen | 4b3af05 | 2014-05-27 17:53:10 -0700 | [diff] [blame] | 52 | |
| 53 | mReplacementMap.put("/", context.getString(R.string.op_div)); |
| 54 | mReplacementMap.put("*", context.getString(R.string.op_mul)); |
| 55 | mReplacementMap.put("-", context.getString(R.string.op_sub)); |
| 56 | |
| 57 | mReplacementMap.put("cos", context.getString(R.string.fun_cos)); |
| 58 | mReplacementMap.put("ln", context.getString(R.string.fun_ln)); |
| 59 | mReplacementMap.put("log", context.getString(R.string.fun_log)); |
| 60 | mReplacementMap.put("sin", context.getString(R.string.fun_sin)); |
| 61 | mReplacementMap.put("tan", context.getString(R.string.fun_tan)); |
| 62 | |
| 63 | mReplacementMap.put("Infinity", context.getString(R.string.inf)); |
| 64 | } |
| 65 | |
| 66 | public String getNormalizedExpression(String expr) { |
| 67 | for (Entry<String, String> replacementEntry : mReplacementMap.entrySet()) { |
| 68 | expr = expr.replace(replacementEntry.getValue(), replacementEntry.getKey()); |
| 69 | } |
| 70 | return expr; |
| 71 | } |
| 72 | |
| 73 | public String getLocalizedExpression(String expr) { |
| 74 | for (Entry<String, String> replacementEntry : mReplacementMap.entrySet()) { |
| 75 | expr = expr.replace(replacementEntry.getKey(), replacementEntry.getValue()); |
| 76 | } |
| 77 | return expr; |
| 78 | } |
| 79 | } |