1 /* 2 * Copyright (C) 2007 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 android.util; 18 19 import android.annotation.AnyRes; 20 import android.content.pm.ActivityInfo.Config; 21 22 /** 23 * Container for a dynamically typed data value. Primarily used with 24 * {@link android.content.res.Resources} for holding resource values. 25 */ 26 public class TypedValue { 27 /** The value contains no data. */ 28 public static final int TYPE_NULL = 0x00; 29 30 /** The <var>data</var> field holds a resource identifier. */ 31 public static final int TYPE_REFERENCE = 0x01; 32 /** The <var>data</var> field holds an attribute resource 33 * identifier (referencing an attribute in the current theme 34 * style, not a resource entry). */ 35 public static final int TYPE_ATTRIBUTE = 0x02; 36 /** The <var>string</var> field holds string data. In addition, if 37 * <var>data</var> is non-zero then it is the string block 38 * index of the string and <var>assetCookie</var> is the set of 39 * assets the string came from. */ 40 public static final int TYPE_STRING = 0x03; 41 /** The <var>data</var> field holds an IEEE 754 floating point number. */ 42 public static final int TYPE_FLOAT = 0x04; 43 /** The <var>data</var> field holds a complex number encoding a 44 * dimension value. */ 45 public static final int TYPE_DIMENSION = 0x05; 46 /** The <var>data</var> field holds a complex number encoding a fraction 47 * of a container. */ 48 public static final int TYPE_FRACTION = 0x06; 49 50 /** Identifies the start of plain integer values. Any type value 51 * from this to {@link #TYPE_LAST_INT} means the 52 * <var>data</var> field holds a generic integer value. */ 53 public static final int TYPE_FIRST_INT = 0x10; 54 55 /** The <var>data</var> field holds a number that was 56 * originally specified in decimal. */ 57 public static final int TYPE_INT_DEC = 0x10; 58 /** The <var>data</var> field holds a number that was 59 * originally specified in hexadecimal (0xn). */ 60 public static final int TYPE_INT_HEX = 0x11; 61 /** The <var>data</var> field holds 0 or 1 that was originally 62 * specified as "false" or "true". */ 63 public static final int TYPE_INT_BOOLEAN = 0x12; 64 65 /** Identifies the start of integer values that were specified as 66 * color constants (starting with '#'). */ 67 public static final int TYPE_FIRST_COLOR_INT = 0x1c; 68 69 /** The <var>data</var> field holds a color that was originally 70 * specified as #aarrggbb. */ 71 public static final int TYPE_INT_COLOR_ARGB8 = 0x1c; 72 /** The <var>data</var> field holds a color that was originally 73 * specified as #rrggbb. */ 74 public static final int TYPE_INT_COLOR_RGB8 = 0x1d; 75 /** The <var>data</var> field holds a color that was originally 76 * specified as #argb. */ 77 public static final int TYPE_INT_COLOR_ARGB4 = 0x1e; 78 /** The <var>data</var> field holds a color that was originally 79 * specified as #rgb. */ 80 public static final int TYPE_INT_COLOR_RGB4 = 0x1f; 81 82 /** Identifies the end of integer values that were specified as color 83 * constants. */ 84 public static final int TYPE_LAST_COLOR_INT = 0x1f; 85 86 /** Identifies the end of plain integer values. */ 87 public static final int TYPE_LAST_INT = 0x1f; 88 89 /* ------------------------------------------------------------ */ 90 91 /** Complex data: bit location of unit information. */ 92 public static final int COMPLEX_UNIT_SHIFT = 0; 93 /** Complex data: mask to extract unit information (after shifting by 94 * {@link #COMPLEX_UNIT_SHIFT}). This gives us 16 possible types, as 95 * defined below. */ 96 public static final int COMPLEX_UNIT_MASK = 0xf; 97 98 /** {@link #TYPE_DIMENSION} complex unit: Value is raw pixels. */ 99 public static final int COMPLEX_UNIT_PX = 0; 100 /** {@link #TYPE_DIMENSION} complex unit: Value is Device Independent 101 * Pixels. */ 102 public static final int COMPLEX_UNIT_DIP = 1; 103 /** {@link #TYPE_DIMENSION} complex unit: Value is a scaled pixel. */ 104 public static final int COMPLEX_UNIT_SP = 2; 105 /** {@link #TYPE_DIMENSION} complex unit: Value is in points. */ 106 public static final int COMPLEX_UNIT_PT = 3; 107 /** {@link #TYPE_DIMENSION} complex unit: Value is in inches. */ 108 public static final int COMPLEX_UNIT_IN = 4; 109 /** {@link #TYPE_DIMENSION} complex unit: Value is in millimeters. */ 110 public static final int COMPLEX_UNIT_MM = 5; 111 112 /** {@link #TYPE_FRACTION} complex unit: A basic fraction of the overall 113 * size. */ 114 public static final int COMPLEX_UNIT_FRACTION = 0; 115 /** {@link #TYPE_FRACTION} complex unit: A fraction of the parent size. */ 116 public static final int COMPLEX_UNIT_FRACTION_PARENT = 1; 117 118 /** Complex data: where the radix information is, telling where the decimal 119 * place appears in the mantissa. */ 120 public static final int COMPLEX_RADIX_SHIFT = 4; 121 /** Complex data: mask to extract radix information (after shifting by 122 * {@link #COMPLEX_RADIX_SHIFT}). This give us 4 possible fixed point 123 * representations as defined below. */ 124 public static final int COMPLEX_RADIX_MASK = 0x3; 125 126 /** Complex data: the mantissa is an integral number -- i.e., 0xnnnnnn.0 */ 127 public static final int COMPLEX_RADIX_23p0 = 0; 128 /** Complex data: the mantissa magnitude is 16 bits -- i.e, 0xnnnn.nn */ 129 public static final int COMPLEX_RADIX_16p7 = 1; 130 /** Complex data: the mantissa magnitude is 8 bits -- i.e, 0xnn.nnnn */ 131 public static final int COMPLEX_RADIX_8p15 = 2; 132 /** Complex data: the mantissa magnitude is 0 bits -- i.e, 0x0.nnnnnn */ 133 public static final int COMPLEX_RADIX_0p23 = 3; 134 135 /** Complex data: bit location of mantissa information. */ 136 public static final int COMPLEX_MANTISSA_SHIFT = 8; 137 /** Complex data: mask to extract mantissa information (after shifting by 138 * {@link #COMPLEX_MANTISSA_SHIFT}). This gives us 23 bits of precision; 139 * the top bit is the sign. */ 140 public static final int COMPLEX_MANTISSA_MASK = 0xffffff; 141 142 /* ------------------------------------------------------------ */ 143 144 /** 145 * {@link #TYPE_NULL} data indicating the value was not specified. 146 */ 147 public static final int DATA_NULL_UNDEFINED = 0; 148 /** 149 * {@link #TYPE_NULL} data indicating the value was explicitly set to null. 150 */ 151 public static final int DATA_NULL_EMPTY = 1; 152 153 /* ------------------------------------------------------------ */ 154 155 /** 156 * If {@link #density} is equal to this value, then the density should be 157 * treated as the system's default density value: {@link DisplayMetrics#DENSITY_DEFAULT}. 158 */ 159 public static final int DENSITY_DEFAULT = 0; 160 161 /** 162 * If {@link #density} is equal to this value, then there is no density 163 * associated with the resource and it should not be scaled. 164 */ 165 public static final int DENSITY_NONE = 0xffff; 166 167 /* ------------------------------------------------------------ */ 168 169 /** The type held by this value, as defined by the constants here. 170 * This tells you how to interpret the other fields in the object. */ 171 public int type; 172 173 /** If the value holds a string, this is it. */ 174 public CharSequence string; 175 176 /** Basic data in the value, interpreted according to {@link #type} */ 177 public int data; 178 179 /** Additional information about where the value came from; only 180 * set for strings. */ 181 public int assetCookie; 182 183 /** If Value came from a resource, this holds the corresponding resource id. */ 184 @AnyRes 185 public int resourceId; 186 187 /** 188 * If the value came from a resource, these are the configurations for 189 * which its contents can change. 190 * 191 * <p>For example, if a resource has a value defined for the -land resource qualifier, 192 * this field will have the {@link android.content.pm.ActivityInfo#CONFIG_ORIENTATION} bit set. 193 * </p> 194 * 195 * @see android.content.pm.ActivityInfo#CONFIG_MCC 196 * @see android.content.pm.ActivityInfo#CONFIG_MNC 197 * @see android.content.pm.ActivityInfo#CONFIG_LOCALE 198 * @see android.content.pm.ActivityInfo#CONFIG_TOUCHSCREEN 199 * @see android.content.pm.ActivityInfo#CONFIG_KEYBOARD 200 * @see android.content.pm.ActivityInfo#CONFIG_KEYBOARD_HIDDEN 201 * @see android.content.pm.ActivityInfo#CONFIG_NAVIGATION 202 * @see android.content.pm.ActivityInfo#CONFIG_ORIENTATION 203 * @see android.content.pm.ActivityInfo#CONFIG_SCREEN_LAYOUT 204 * @see android.content.pm.ActivityInfo#CONFIG_UI_MODE 205 * @see android.content.pm.ActivityInfo#CONFIG_SCREEN_SIZE 206 * @see android.content.pm.ActivityInfo#CONFIG_SMALLEST_SCREEN_SIZE 207 * @see android.content.pm.ActivityInfo#CONFIG_DENSITY 208 * @see android.content.pm.ActivityInfo#CONFIG_LAYOUT_DIRECTION 209 * @see android.content.pm.ActivityInfo#CONFIG_COLOR_MODE 210 * 211 */ 212 public @Config int changingConfigurations = -1; 213 214 /** 215 * If the Value came from a resource, this holds the corresponding pixel density. 216 * */ 217 public int density; 218 219 /* ------------------------------------------------------------ */ 220 221 /** Return the data for this value as a float. Only use for values 222 * whose type is {@link #TYPE_FLOAT}. */ 223 public final float getFloat() { 224 return Float.intBitsToFloat(data); 225 } 226 227 private static final float MANTISSA_MULT = 228 1.0f / (1<<TypedValue.COMPLEX_MANTISSA_SHIFT); 229 private static final float[] RADIX_MULTS = new float[] { 230 1.0f*MANTISSA_MULT, 1.0f/(1<<7)*MANTISSA_MULT, 231 1.0f/(1<<15)*MANTISSA_MULT, 1.0f/(1<<23)*MANTISSA_MULT 232 }; 233 234 /** 235 * Retrieve the base value from a complex data integer. This uses the 236 * {@link #COMPLEX_MANTISSA_MASK} and {@link #COMPLEX_RADIX_MASK} fields of 237 * the data to compute a floating point representation of the number they 238 * describe. The units are ignored. 239 * 240 * @param complex A complex data value. 241 * 242 * @return A floating point value corresponding to the complex data. 243 */ 244 public static float complexToFloat(int complex) 245 { 246 return (complex&(TypedValue.COMPLEX_MANTISSA_MASK 247 <<TypedValue.COMPLEX_MANTISSA_SHIFT)) 248 * RADIX_MULTS[(complex>>TypedValue.COMPLEX_RADIX_SHIFT) 249 & TypedValue.COMPLEX_RADIX_MASK]; 250 } 251 252 /** 253 * Converts a complex data value holding a dimension to its final floating 254 * point value. The given <var>data</var> must be structured as a 255 * {@link #TYPE_DIMENSION}. 256 * 257 * @param data A complex data value holding a unit, magnitude, and 258 * mantissa. 259 * @param metrics Current display metrics to use in the conversion -- 260 * supplies display density and scaling information. 261 * 262 * @return The complex floating point value multiplied by the appropriate 263 * metrics depending on its unit. 264 */ 265 public static float complexToDimension(int data, DisplayMetrics metrics) 266 { 267 return applyDimension( 268 (data>>COMPLEX_UNIT_SHIFT)&COMPLEX_UNIT_MASK, 269 complexToFloat(data), 270 metrics); 271 } 272 273 /** 274 * Converts a complex data value holding a dimension to its final value 275 * as an integer pixel offset. This is the same as 276 * {@link #complexToDimension}, except the raw floating point value is 277 * truncated to an integer (pixel) value. 278 * The given <var>data</var> must be structured as a 279 * {@link #TYPE_DIMENSION}. 280 * 281 * @param data A complex data value holding a unit, magnitude, and 282 * mantissa. 283 * @param metrics Current display metrics to use in the conversion -- 284 * supplies display density and scaling information. 285 * 286 * @return The number of pixels specified by the data and its desired 287 * multiplier and units. 288 */ 289 public static int complexToDimensionPixelOffset(int data, 290 DisplayMetrics metrics) 291 { 292 return (int)applyDimension( 293 (data>>COMPLEX_UNIT_SHIFT)&COMPLEX_UNIT_MASK, 294 complexToFloat(data), 295 metrics); 296 } 297 298 /** 299 * Converts a complex data value holding a dimension to its final value 300 * as an integer pixel size. This is the same as 301 * {@link #complexToDimension}, except the raw floating point value is 302 * converted to an integer (pixel) value for use as a size. A size 303 * conversion involves rounding the base value, and ensuring that a 304 * non-zero base value is at least one pixel in size. 305 * The given <var>data</var> must be structured as a 306 * {@link #TYPE_DIMENSION}. 307 * 308 * @param data A complex data value holding a unit, magnitude, and 309 * mantissa. 310 * @param metrics Current display metrics to use in the conversion -- 311 * supplies display density and scaling information. 312 * 313 * @return The number of pixels specified by the data and its desired 314 * multiplier and units. 315 */ 316 public static int complexToDimensionPixelSize(int data, 317 DisplayMetrics metrics) 318 { 319 final float value = complexToFloat(data); 320 final float f = applyDimension( 321 (data>>COMPLEX_UNIT_SHIFT)&COMPLEX_UNIT_MASK, 322 value, 323 metrics); 324 final int res = (int) ((f >= 0) ? (f + 0.5f) : (f - 0.5f)); 325 if (res != 0) return res; 326 if (value == 0) return 0; 327 if (value > 0) return 1; 328 return -1; 329 } 330 331 /** 332 * @hide Was accidentally exposed in API level 1 for debugging purposes. 333 * Kept for compatibility just in case although the debugging code has been removed. 334 */ 335 @Deprecated 336 public static float complexToDimensionNoisy(int data, DisplayMetrics metrics) 337 { 338 return complexToDimension(data, metrics); 339 } 340 341 /** 342 * Return the complex unit type for this value. For example, a dimen type 343 * with value 12sp will return {@link #COMPLEX_UNIT_SP}. Only use for values 344 * whose type is {@link #TYPE_DIMENSION}. 345 * 346 * @return The complex unit type. 347 */ 348 public int getComplexUnit() 349 { 350 return COMPLEX_UNIT_MASK & (data>>TypedValue.COMPLEX_UNIT_SHIFT); 351 } 352 353 /** 354 * Converts an unpacked complex data value holding a dimension to its final floating 355 * point value. The two parameters <var>unit</var> and <var>value</var> 356 * are as in {@link #TYPE_DIMENSION}. 357 * 358 * @param unit The unit to convert from. 359 * @param value The value to apply the unit to. 360 * @param metrics Current display metrics to use in the conversion -- 361 * supplies display density and scaling information. 362 * 363 * @return The complex floating point value multiplied by the appropriate 364 * metrics depending on its unit. 365 */ 366 public static float applyDimension(int unit, float value, 367 DisplayMetrics metrics) 368 { 369 switch (unit) { 370 case COMPLEX_UNIT_PX: 371 return value; 372 case COMPLEX_UNIT_DIP: 373 return value * metrics.density; 374 case COMPLEX_UNIT_SP: 375 return value * metrics.scaledDensity; 376 case COMPLEX_UNIT_PT: 377 return value * metrics.xdpi * (1.0f/72); 378 case COMPLEX_UNIT_IN: 379 return value * metrics.xdpi; 380 case COMPLEX_UNIT_MM: 381 return value * metrics.xdpi * (1.0f/25.4f); 382 } 383 return 0; 384 } 385 386 /** 387 * Return the data for this value as a dimension. Only use for values 388 * whose type is {@link #TYPE_DIMENSION}. 389 * 390 * @param metrics Current display metrics to use in the conversion -- 391 * supplies display density and scaling information. 392 * 393 * @return The complex floating point value multiplied by the appropriate 394 * metrics depending on its unit. 395 */ 396 public float getDimension(DisplayMetrics metrics) 397 { 398 return complexToDimension(data, metrics); 399 } 400 401 /** 402 * Converts a complex data value holding a fraction to its final floating 403 * point value. The given <var>data</var> must be structured as a 404 * {@link #TYPE_FRACTION}. 405 * 406 * @param data A complex data value holding a unit, magnitude, and 407 * mantissa. 408 * @param base The base value of this fraction. In other words, a 409 * standard fraction is multiplied by this value. 410 * @param pbase The parent base value of this fraction. In other 411 * words, a parent fraction (nn%p) is multiplied by this 412 * value. 413 * 414 * @return The complex floating point value multiplied by the appropriate 415 * base value depending on its unit. 416 */ 417 public static float complexToFraction(int data, float base, float pbase) 418 { 419 switch ((data>>COMPLEX_UNIT_SHIFT)&COMPLEX_UNIT_MASK) { 420 case COMPLEX_UNIT_FRACTION: 421 return complexToFloat(data) * base; 422 case COMPLEX_UNIT_FRACTION_PARENT: 423 return complexToFloat(data) * pbase; 424 } 425 return 0; 426 } 427 428 /** 429 * Return the data for this value as a fraction. Only use for values whose 430 * type is {@link #TYPE_FRACTION}. 431 * 432 * @param base The base value of this fraction. In other words, a 433 * standard fraction is multiplied by this value. 434 * @param pbase The parent base value of this fraction. In other 435 * words, a parent fraction (nn%p) is multiplied by this 436 * value. 437 * 438 * @return The complex floating point value multiplied by the appropriate 439 * base value depending on its unit. 440 */ 441 public float getFraction(float base, float pbase) 442 { 443 return complexToFraction(data, base, pbase); 444 } 445 446 /** 447 * Regardless of the actual type of the value, try to convert it to a 448 * string value. For example, a color type will be converted to a 449 * string of the form #aarrggbb. 450 * 451 * @return CharSequence The coerced string value. If the value is 452 * null or the type is not known, null is returned. 453 */ 454 public final CharSequence coerceToString() 455 { 456 int t = type; 457 if (t == TYPE_STRING) { 458 return string; 459 } 460 return coerceToString(t, data); 461 } 462 463 private static final String[] DIMENSION_UNIT_STRS = new String[] { 464 "px", "dip", "sp", "pt", "in", "mm" 465 }; 466 private static final String[] FRACTION_UNIT_STRS = new String[] { 467 "%", "%p" 468 }; 469 470 /** 471 * Perform type conversion as per {@link #coerceToString()} on an 472 * explicitly supplied type and data. 473 * 474 * @param type The data type identifier. 475 * @param data The data value. 476 * 477 * @return String The coerced string value. If the value is 478 * null or the type is not known, null is returned. 479 */ 480 public static final String coerceToString(int type, int data) 481 { 482 switch (type) { 483 case TYPE_NULL: 484 return null; 485 case TYPE_REFERENCE: 486 return "@" + data; 487 case TYPE_ATTRIBUTE: 488 return "?" + data; 489 case TYPE_FLOAT: 490 return Float.toString(Float.intBitsToFloat(data)); 491 case TYPE_DIMENSION: 492 return Float.toString(complexToFloat(data)) + DIMENSION_UNIT_STRS[ 493 (data>>COMPLEX_UNIT_SHIFT)&COMPLEX_UNIT_MASK]; 494 case TYPE_FRACTION: 495 return Float.toString(complexToFloat(data)*100) + FRACTION_UNIT_STRS[ 496 (data>>COMPLEX_UNIT_SHIFT)&COMPLEX_UNIT_MASK]; 497 case TYPE_INT_HEX: 498 return "0x" + Integer.toHexString(data); 499 case TYPE_INT_BOOLEAN: 500 return data != 0 ? "true" : "false"; 501 } 502 503 if (type >= TYPE_FIRST_COLOR_INT && type <= TYPE_LAST_COLOR_INT) { 504 return "#" + Integer.toHexString(data); 505 } else if (type >= TYPE_FIRST_INT && type <= TYPE_LAST_INT) { 506 return Integer.toString(data); 507 } 508 509 return null; 510 } 511 512 public void setTo(TypedValue other) 513 { 514 type = other.type; 515 string = other.string; 516 data = other.data; 517 assetCookie = other.assetCookie; 518 resourceId = other.resourceId; 519 density = other.density; 520 } 521 522 public String toString() 523 { 524 StringBuilder sb = new StringBuilder(); 525 sb.append("TypedValue{t=0x").append(Integer.toHexString(type)); 526 sb.append("/d=0x").append(Integer.toHexString(data)); 527 if (type == TYPE_STRING) { 528 sb.append(" \"").append(string != null ? string : "<null>").append("\""); 529 } 530 if (assetCookie != 0) { 531 sb.append(" a=").append(assetCookie); 532 } 533 if (resourceId != 0) { 534 sb.append(" r=0x").append(Integer.toHexString(resourceId)); 535 } 536 sb.append("}"); 537 return sb.toString(); 538 } 539 }; 540 541
