Hans Boehm | 8461495 | 2014-11-25 18:46:17 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2015 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.res.Resources; |
| 20 | import android.content.Context; |
Hans Boehm | 4a6b7cb | 2015-04-03 18:41:52 -0700 | [diff] [blame] | 21 | import android.app.Activity; |
| 22 | import android.util.Log; |
Hans Boehm | 8461495 | 2014-11-25 18:46:17 -0800 | [diff] [blame] | 23 | import android.view.View; |
Hans Boehm | 4a6b7cb | 2015-04-03 18:41:52 -0700 | [diff] [blame] | 24 | import android.widget.Button; |
| 25 | |
Hans Boehm | 8461495 | 2014-11-25 18:46:17 -0800 | [diff] [blame] | 26 | import java.text.DecimalFormatSymbols; |
Hans Boehm | 4a6b7cb | 2015-04-03 18:41:52 -0700 | [diff] [blame] | 27 | import java.util.HashMap; |
| 28 | import java.util.Locale; |
Hans Boehm | 8461495 | 2014-11-25 18:46:17 -0800 | [diff] [blame] | 29 | |
Hans Boehm | 013969e | 2015-04-13 20:29:47 -0700 | [diff] [blame] | 30 | // KeyMap instances are not meaningful; everything here is static. |
| 31 | // All functions are either pure, or are assumed to be called only from |
| 32 | // a single UI thread. |
| 33 | |
Hans Boehm | 8461495 | 2014-11-25 18:46:17 -0800 | [diff] [blame] | 34 | public class KeyMaps { |
Hans Boehm | 013969e | 2015-04-13 20:29:47 -0700 | [diff] [blame] | 35 | // Map key id to corresponding (internationalized) display string. |
| 36 | // Pure function. |
Hans Boehm | 8461495 | 2014-11-25 18:46:17 -0800 | [diff] [blame] | 37 | public static String toString(int id, Context context) { |
| 38 | Resources res = context.getResources(); |
| 39 | switch(id) { |
| 40 | case R.id.const_pi: return res.getString(R.string.const_pi); |
| 41 | case R.id.const_e: return res.getString(R.string.const_e); |
| 42 | case R.id.op_sqrt: return res.getString(R.string.op_sqrt); |
| 43 | case R.id.op_fact: return res.getString(R.string.op_fact); |
| 44 | case R.id.fun_sin: return res.getString(R.string.fun_sin) |
| 45 | + res.getString(R.string.lparen); |
Hans Boehm | 013969e | 2015-04-13 20:29:47 -0700 | [diff] [blame] | 46 | case R.id.fun_cos: return res.getString(R.string.fun_cos) |
Hans Boehm | 8461495 | 2014-11-25 18:46:17 -0800 | [diff] [blame] | 47 | + res.getString(R.string.lparen); |
| 48 | case R.id.fun_tan: return res.getString(R.string.fun_tan) |
| 49 | + res.getString(R.string.lparen); |
| 50 | case R.id.fun_arcsin: return res.getString(R.string.fun_arcsin) |
| 51 | + res.getString(R.string.lparen); |
Hans Boehm | 013969e | 2015-04-13 20:29:47 -0700 | [diff] [blame] | 52 | case R.id.fun_arccos: return res.getString(R.string.fun_arccos) |
Hans Boehm | 8461495 | 2014-11-25 18:46:17 -0800 | [diff] [blame] | 53 | + res.getString(R.string.lparen); |
| 54 | case R.id.fun_arctan: return res.getString(R.string.fun_arctan) |
| 55 | + res.getString(R.string.lparen); |
| 56 | case R.id.fun_ln: return res.getString(R.string.fun_ln) |
| 57 | + res.getString(R.string.lparen); |
| 58 | case R.id.fun_log: return res.getString(R.string.fun_log) |
| 59 | + res.getString(R.string.lparen); |
| 60 | case R.id.lparen: return res.getString(R.string.lparen); |
| 61 | case R.id.rparen: return res.getString(R.string.rparen); |
| 62 | case R.id.op_pow: return res.getString(R.string.op_pow); |
| 63 | case R.id.op_mul: return res.getString(R.string.op_mul); |
| 64 | case R.id.op_div: return res.getString(R.string.op_div); |
| 65 | case R.id.op_add: return res.getString(R.string.op_add); |
| 66 | case R.id.op_sub: return res.getString(R.string.op_sub); |
| 67 | case R.id.dec_point: return res.getString(R.string.dec_point); |
| 68 | case R.id.digit_0: return res.getString(R.string.digit_0); |
| 69 | case R.id.digit_1: return res.getString(R.string.digit_1); |
| 70 | case R.id.digit_2: return res.getString(R.string.digit_2); |
| 71 | case R.id.digit_3: return res.getString(R.string.digit_3); |
| 72 | case R.id.digit_4: return res.getString(R.string.digit_4); |
| 73 | case R.id.digit_5: return res.getString(R.string.digit_5); |
| 74 | case R.id.digit_6: return res.getString(R.string.digit_6); |
| 75 | case R.id.digit_7: return res.getString(R.string.digit_7); |
| 76 | case R.id.digit_8: return res.getString(R.string.digit_8); |
| 77 | case R.id.digit_9: return res.getString(R.string.digit_9); |
| 78 | default: return "?oops?"; |
| 79 | } |
| 80 | } |
| 81 | |
| 82 | // Does a button id correspond to a binary operator? |
Hans Boehm | 013969e | 2015-04-13 20:29:47 -0700 | [diff] [blame] | 83 | // Pure function. |
Hans Boehm | 8461495 | 2014-11-25 18:46:17 -0800 | [diff] [blame] | 84 | public static boolean isBinary(int id) { |
| 85 | switch(id) { |
| 86 | case R.id.op_pow: |
| 87 | case R.id.op_mul: |
| 88 | case R.id.op_div: |
| 89 | case R.id.op_add: |
| 90 | case R.id.op_sub: |
| 91 | return true; |
| 92 | default: |
| 93 | return false; |
| 94 | } |
| 95 | } |
| 96 | |
| 97 | // Does a button id correspond to a suffix operator? |
| 98 | public static boolean isSuffix(int id) { |
| 99 | return id == R.id.op_fact; |
| 100 | } |
| 101 | |
| 102 | public static final int NOT_DIGIT = 10; |
| 103 | |
Hans Boehm | 08e8f32 | 2015-04-21 13:18:38 -0700 | [diff] [blame^] | 104 | public static final String ELLIPSIS = "\u2026"; |
| 105 | |
Hans Boehm | 8461495 | 2014-11-25 18:46:17 -0800 | [diff] [blame] | 106 | // Map key id to digit or NOT_DIGIT |
Hans Boehm | 013969e | 2015-04-13 20:29:47 -0700 | [diff] [blame] | 107 | // Pure function. |
Hans Boehm | 8461495 | 2014-11-25 18:46:17 -0800 | [diff] [blame] | 108 | public static int digVal(int id) { |
| 109 | switch (id) { |
| 110 | case R.id.digit_0: |
| 111 | return 0; |
| 112 | case R.id.digit_1: |
| 113 | return 1; |
| 114 | case R.id.digit_2: |
| 115 | return 2; |
| 116 | case R.id.digit_3: |
| 117 | return 3; |
| 118 | case R.id.digit_4: |
| 119 | return 4; |
| 120 | case R.id.digit_5: |
| 121 | return 5; |
| 122 | case R.id.digit_6: |
| 123 | return 6; |
| 124 | case R.id.digit_7: |
| 125 | return 7; |
| 126 | case R.id.digit_8: |
| 127 | return 8; |
| 128 | case R.id.digit_9: |
| 129 | return 9; |
| 130 | default: |
| 131 | return NOT_DIGIT; |
| 132 | } |
| 133 | } |
| 134 | |
| 135 | // Map digit to corresponding key. Inverse of above. |
Hans Boehm | 013969e | 2015-04-13 20:29:47 -0700 | [diff] [blame] | 136 | // Pure function. |
Hans Boehm | 8461495 | 2014-11-25 18:46:17 -0800 | [diff] [blame] | 137 | public static int keyForDigVal(int v) { |
| 138 | switch(v) { |
| 139 | case 0: |
| 140 | return R.id.digit_0; |
| 141 | case 1: |
| 142 | return R.id.digit_1; |
| 143 | case 2: |
| 144 | return R.id.digit_2; |
| 145 | case 3: |
| 146 | return R.id.digit_3; |
| 147 | case 4: |
| 148 | return R.id.digit_4; |
| 149 | case 5: |
| 150 | return R.id.digit_5; |
| 151 | case 6: |
| 152 | return R.id.digit_6; |
| 153 | case 7: |
| 154 | return R.id.digit_7; |
| 155 | case 8: |
| 156 | return R.id.digit_8; |
| 157 | case 9: |
| 158 | return R.id.digit_9; |
| 159 | default: |
| 160 | return View.NO_ID; |
| 161 | } |
| 162 | } |
| 163 | |
Hans Boehm | 013969e | 2015-04-13 20:29:47 -0700 | [diff] [blame] | 164 | static char mDecimalPt = |
Hans Boehm | 8461495 | 2014-11-25 18:46:17 -0800 | [diff] [blame] | 165 | DecimalFormatSymbols.getInstance().getDecimalSeparator(); |
| 166 | |
Hans Boehm | 4a6b7cb | 2015-04-03 18:41:52 -0700 | [diff] [blame] | 167 | static char mPiChar; |
| 168 | |
| 169 | static char mFactChar; |
| 170 | |
| 171 | static HashMap<String, Integer> sKeyValForFun; |
| 172 | // Key value corresponding to given function name. |
| 173 | // We include both localized and English names. |
| 174 | |
Hans Boehm | 013969e | 2015-04-13 20:29:47 -0700 | [diff] [blame] | 175 | static HashMap<Character, String> sOutputForResultChar; |
| 176 | // Result string corresponding to a character in the |
| 177 | // calculator result. |
| 178 | // The string values in the map are expected to be one character |
| 179 | // long. |
| 180 | |
| 181 | static String sLocaleForMaps = "none"; |
| 182 | // Locale string corresponding to preceding map and character |
Hans Boehm | 4a6b7cb | 2015-04-03 18:41:52 -0700 | [diff] [blame] | 183 | // constants. |
| 184 | // We recompute the map if this is not the current locale. |
| 185 | |
Hans Boehm | 013969e | 2015-04-13 20:29:47 -0700 | [diff] [blame] | 186 | static Activity mActivity; // Activity to use for looking up |
| 187 | // buttons. |
| 188 | |
| 189 | // Called only by UI thread. |
| 190 | public static void setActivity(Activity a) { |
| 191 | mActivity = a; |
| 192 | } |
| 193 | |
Hans Boehm | 8461495 | 2014-11-25 18:46:17 -0800 | [diff] [blame] | 194 | // Return the button id corresponding to the supplied character |
| 195 | // or NO_ID |
Hans Boehm | 4a6b7cb | 2015-04-03 18:41:52 -0700 | [diff] [blame] | 196 | // Called only by UI thread. |
Hans Boehm | 013969e | 2015-04-13 20:29:47 -0700 | [diff] [blame] | 197 | public static int keyForChar(char c) { |
| 198 | validateMaps(); |
Hans Boehm | 8461495 | 2014-11-25 18:46:17 -0800 | [diff] [blame] | 199 | if (Character.isDigit(c)) { |
| 200 | int i = Character.digit(c, 10); |
| 201 | return KeyMaps.keyForDigVal(i); |
| 202 | } |
Hans Boehm | 8461495 | 2014-11-25 18:46:17 -0800 | [diff] [blame] | 203 | switch (c) { |
| 204 | case '.': |
| 205 | return R.id.dec_point; |
| 206 | case '-': |
| 207 | return R.id.op_sub; |
| 208 | case '+': |
| 209 | return R.id.op_add; |
| 210 | case '*': |
| 211 | return R.id.op_mul; |
| 212 | case '/': |
| 213 | return R.id.op_div; |
Hans Boehm | 4a6b7cb | 2015-04-03 18:41:52 -0700 | [diff] [blame] | 214 | // TODO: We have an issue if any of the localized function |
| 215 | // names start with 'e' or 'p'. That doesn't currently appear |
| 216 | // to be the case. In fact the first letters of the Latin |
| 217 | // allphabet ones seem rather predictable. |
Hans Boehm | 8461495 | 2014-11-25 18:46:17 -0800 | [diff] [blame] | 218 | case 'e': |
Hans Boehm | 4a6b7cb | 2015-04-03 18:41:52 -0700 | [diff] [blame] | 219 | case 'E': |
Hans Boehm | 8461495 | 2014-11-25 18:46:17 -0800 | [diff] [blame] | 220 | return R.id.const_e; |
Hans Boehm | 4a6b7cb | 2015-04-03 18:41:52 -0700 | [diff] [blame] | 221 | case 'p': |
| 222 | case 'P': |
| 223 | return R.id.const_pi; |
Hans Boehm | 8461495 | 2014-11-25 18:46:17 -0800 | [diff] [blame] | 224 | case '^': |
| 225 | return R.id.op_pow; |
Hans Boehm | 4a6b7cb | 2015-04-03 18:41:52 -0700 | [diff] [blame] | 226 | case '!': |
| 227 | return R.id.op_fact; |
| 228 | case '(': |
| 229 | return R.id.lparen; |
| 230 | case ')': |
| 231 | return R.id.rparen; |
Hans Boehm | 8461495 | 2014-11-25 18:46:17 -0800 | [diff] [blame] | 232 | default: |
Hans Boehm | 013969e | 2015-04-13 20:29:47 -0700 | [diff] [blame] | 233 | if (c == mDecimalPt) return R.id.dec_point; |
Hans Boehm | 4a6b7cb | 2015-04-03 18:41:52 -0700 | [diff] [blame] | 234 | if (c == mPiChar) return R.id.const_pi; |
| 235 | // pi is not translated, but it might be typable on |
| 236 | // a Greek keyboard, so we check ... |
Hans Boehm | 8461495 | 2014-11-25 18:46:17 -0800 | [diff] [blame] | 237 | return View.NO_ID; |
| 238 | } |
| 239 | } |
Hans Boehm | 4a6b7cb | 2015-04-03 18:41:52 -0700 | [diff] [blame] | 240 | |
| 241 | // Add information corresponding to the given button id to |
| 242 | // sKeyValForFun. |
Hans Boehm | 013969e | 2015-04-13 20:29:47 -0700 | [diff] [blame] | 243 | static void addButtonToFunMap(int button_id) { |
| 244 | Button button = (Button)mActivity.findViewById(button_id); |
Hans Boehm | 4a6b7cb | 2015-04-03 18:41:52 -0700 | [diff] [blame] | 245 | sKeyValForFun.put(button.getText().toString(), button_id); |
| 246 | } |
| 247 | |
Hans Boehm | 013969e | 2015-04-13 20:29:47 -0700 | [diff] [blame] | 248 | // Ditto, but for sOutputForResultChar. |
| 249 | static void addButtonToOutputMap(char c, int button_id) { |
| 250 | Button button = (Button)mActivity.findViewById(button_id); |
| 251 | sOutputForResultChar.put(c, button.getText().toString()); |
| 252 | } |
| 253 | |
Hans Boehm | 4a6b7cb | 2015-04-03 18:41:52 -0700 | [diff] [blame] | 254 | // Ensure that the preceding map and character constants are |
| 255 | // initialized and correspond to the current locale. |
| 256 | // Called only by a single thread, namely the UI thread. |
Hans Boehm | 013969e | 2015-04-13 20:29:47 -0700 | [diff] [blame] | 257 | static void validateMaps() { |
Hans Boehm | 4a6b7cb | 2015-04-03 18:41:52 -0700 | [diff] [blame] | 258 | Locale locale = Locale.getDefault(); |
| 259 | String lname = locale.toString(); |
Hans Boehm | 013969e | 2015-04-13 20:29:47 -0700 | [diff] [blame] | 260 | if (lname != sLocaleForMaps) { |
Hans Boehm | 4a6b7cb | 2015-04-03 18:41:52 -0700 | [diff] [blame] | 261 | Log.v ("Calculator", "Setting local to: " + lname); |
| 262 | sKeyValForFun = new HashMap<String, Integer>(); |
| 263 | sKeyValForFun.put("sin", R.id.fun_sin); |
| 264 | sKeyValForFun.put("cos", R.id.fun_cos); |
| 265 | sKeyValForFun.put("tan", R.id.fun_tan); |
| 266 | sKeyValForFun.put("arcsin", R.id.fun_arcsin); |
| 267 | sKeyValForFun.put("arccos", R.id.fun_arccos); |
| 268 | sKeyValForFun.put("arctan", R.id.fun_arctan); |
| 269 | sKeyValForFun.put("asin", R.id.fun_arcsin); |
| 270 | sKeyValForFun.put("acos", R.id.fun_arccos); |
| 271 | sKeyValForFun.put("atan", R.id.fun_arctan); |
| 272 | sKeyValForFun.put("ln", R.id.fun_ln); |
| 273 | sKeyValForFun.put("log", R.id.fun_log); |
| 274 | sKeyValForFun.put("sqrt", R.id.op_sqrt); // special treatment |
Hans Boehm | 013969e | 2015-04-13 20:29:47 -0700 | [diff] [blame] | 275 | addButtonToFunMap(R.id.fun_sin); |
| 276 | addButtonToFunMap(R.id.fun_cos); |
| 277 | addButtonToFunMap(R.id.fun_tan); |
| 278 | addButtonToFunMap(R.id.fun_arcsin); |
| 279 | addButtonToFunMap(R.id.fun_arccos); |
| 280 | addButtonToFunMap(R.id.fun_arctan); |
| 281 | addButtonToFunMap(R.id.fun_ln); |
| 282 | addButtonToFunMap(R.id.fun_log); |
Hans Boehm | 4a6b7cb | 2015-04-03 18:41:52 -0700 | [diff] [blame] | 283 | |
| 284 | // Set locale-dependent character "constants" |
Hans Boehm | 013969e | 2015-04-13 20:29:47 -0700 | [diff] [blame] | 285 | mDecimalPt = |
Hans Boehm | 4a6b7cb | 2015-04-03 18:41:52 -0700 | [diff] [blame] | 286 | DecimalFormatSymbols.getInstance().getDecimalSeparator(); |
Hans Boehm | 013969e | 2015-04-13 20:29:47 -0700 | [diff] [blame] | 287 | Resources res = mActivity.getResources(); |
Hans Boehm | 4a6b7cb | 2015-04-03 18:41:52 -0700 | [diff] [blame] | 288 | mPiChar = mFactChar = 0; |
| 289 | String piString = res.getString(R.string.const_pi); |
| 290 | if (piString.length() == 1) mPiChar = piString.charAt(0); |
| 291 | String factString = res.getString(R.string.op_fact); |
| 292 | if (factString.length() == 1) mFactChar = factString.charAt(0); |
| 293 | |
Hans Boehm | 013969e | 2015-04-13 20:29:47 -0700 | [diff] [blame] | 294 | sOutputForResultChar = new HashMap<Character, String>(); |
| 295 | sOutputForResultChar.put('e', "E"); |
| 296 | sOutputForResultChar.put('E', "E"); |
| 297 | sOutputForResultChar.put('.', String.valueOf(mDecimalPt)); |
Hans Boehm | 08e8f32 | 2015-04-21 13:18:38 -0700 | [diff] [blame^] | 298 | sOutputForResultChar.put(ELLIPSIS.charAt(0), ELLIPSIS); |
Hans Boehm | 013969e | 2015-04-13 20:29:47 -0700 | [diff] [blame] | 299 | sOutputForResultChar.put('/', "/"); |
| 300 | // Translate numbers for fraction display, but not |
| 301 | // the separating slash, which appears to be |
| 302 | // universal. |
| 303 | addButtonToOutputMap('-', R.id.op_sub); |
| 304 | for (int i = 0; i <= 9; ++i) { |
| 305 | addButtonToOutputMap((char)('0' + i), keyForDigVal(i)); |
| 306 | } |
| 307 | |
| 308 | sLocaleForMaps = lname; |
| 309 | |
Hans Boehm | 4a6b7cb | 2015-04-03 18:41:52 -0700 | [diff] [blame] | 310 | } |
| 311 | } |
| 312 | |
| 313 | // Return function button id for the substring of s starting |
| 314 | // at pos and ending with the next "(". |
| 315 | // Return NO_ID if there is none. |
| 316 | // We check for both standard English names and localized |
| 317 | // button labels, though those don't seem to differ much. |
| 318 | // Called only by a single thread, namely the UI thread. |
Hans Boehm | 013969e | 2015-04-13 20:29:47 -0700 | [diff] [blame] | 319 | public static int funForString(String s, int pos) { |
| 320 | validateMaps(); |
Hans Boehm | 4a6b7cb | 2015-04-03 18:41:52 -0700 | [diff] [blame] | 321 | int parenPos = s.indexOf('(', pos); |
| 322 | if (parenPos != -1) { |
| 323 | String funString = s.substring(pos, parenPos); |
| 324 | Integer keyValue = sKeyValForFun.get(funString); |
| 325 | if (keyValue == null) return View.NO_ID; |
| 326 | return keyValue; |
| 327 | } |
| 328 | return View.NO_ID; |
| 329 | } |
Hans Boehm | 013969e | 2015-04-13 20:29:47 -0700 | [diff] [blame] | 330 | |
| 331 | // Called only by UI thread. |
| 332 | public static String translateResult(String s) { |
| 333 | StringBuilder result = new StringBuilder(); |
| 334 | int len = s.length(); |
| 335 | validateMaps(); |
| 336 | for (int i = 0; i < len; ++i) { |
| 337 | char c = s.charAt(i); |
| 338 | String translation = sOutputForResultChar.get(c); |
| 339 | if (translation == null) { |
| 340 | // Should not get here. |
| 341 | Log.v("Calculator", "Bad character:" + c); |
| 342 | result.append(String.valueOf(c)); |
| 343 | } else { |
| 344 | result.append(translation); |
| 345 | } |
| 346 | } |
| 347 | return result.toString(); |
| 348 | } |
| 349 | |
Hans Boehm | 8461495 | 2014-11-25 18:46:17 -0800 | [diff] [blame] | 350 | } |