The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2006 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.text; |
| 18 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 19 | import android.content.res.Resources; |
| 20 | import android.os.Parcel; |
| 21 | import android.os.Parcelable; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 22 | import android.text.style.AbsoluteSizeSpan; |
| 23 | import android.text.style.AlignmentSpan; |
| 24 | import android.text.style.BackgroundColorSpan; |
| 25 | import android.text.style.BulletSpan; |
| 26 | import android.text.style.CharacterStyle; |
Luca Zanolin | e6d3682 | 2011-08-30 18:04:34 +0100 | [diff] [blame] | 27 | import android.text.style.EasyEditSpan; |
Gilles Debunne | 0eea668 | 2011-08-29 13:30:31 -0700 | [diff] [blame] | 28 | import android.text.style.ForegroundColorSpan; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 29 | import android.text.style.LeadingMarginSpan; |
Victoria Lease | df8ef4b | 2012-08-17 15:34:01 -0700 | [diff] [blame] | 30 | import android.text.style.LocaleSpan; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 31 | import android.text.style.MetricAffectingSpan; |
| 32 | import android.text.style.QuoteSpan; |
| 33 | import android.text.style.RelativeSizeSpan; |
| 34 | import android.text.style.ReplacementSpan; |
| 35 | import android.text.style.ScaleXSpan; |
Gilles Debunne | 28294cc | 2011-08-24 12:02:05 -0700 | [diff] [blame] | 36 | import android.text.style.SpellCheckSpan; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 37 | import android.text.style.StrikethroughSpan; |
| 38 | import android.text.style.StyleSpan; |
| 39 | import android.text.style.SubscriptSpan; |
Gilles Debunne | 28294cc | 2011-08-24 12:02:05 -0700 | [diff] [blame] | 40 | import android.text.style.SuggestionRangeSpan; |
Gilles Debunne | a00972a | 2011-04-13 16:07:31 -0700 | [diff] [blame] | 41 | import android.text.style.SuggestionSpan; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 42 | import android.text.style.SuperscriptSpan; |
| 43 | import android.text.style.TextAppearanceSpan; |
| 44 | import android.text.style.TypefaceSpan; |
| 45 | import android.text.style.URLSpan; |
| 46 | import android.text.style.UnderlineSpan; |
| 47 | import android.util.Printer; |
| 48 | |
Fabrice Di Meglio | d3d9f3f | 2012-09-18 12:55:32 -0700 | [diff] [blame^] | 49 | import android.view.View; |
Doug Felt | cb379120 | 2011-07-07 11:57:48 -0700 | [diff] [blame] | 50 | import com.android.internal.R; |
| 51 | import com.android.internal.util.ArrayUtils; |
Fabrice Di Meglio | d3d9f3f | 2012-09-18 12:55:32 -0700 | [diff] [blame^] | 52 | import libcore.icu.ICU; |
Doug Felt | cb379120 | 2011-07-07 11:57:48 -0700 | [diff] [blame] | 53 | |
Gilles Debunne | 1e3ac18 | 2011-03-08 14:22:34 -0800 | [diff] [blame] | 54 | import java.lang.reflect.Array; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 55 | import java.util.Iterator; |
Fabrice Di Meglio | d3d9f3f | 2012-09-18 12:55:32 -0700 | [diff] [blame^] | 56 | import java.util.Locale; |
Doug Felt | e8e45f2 | 2010-03-29 14:58:40 -0700 | [diff] [blame] | 57 | import java.util.regex.Pattern; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 58 | |
| 59 | public class TextUtils { |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 60 | |
Fabrice Di Meglio | cb33264 | 2011-09-23 19:08:04 -0700 | [diff] [blame] | 61 | private TextUtils() { /* cannot be instantiated */ } |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 62 | |
| 63 | public static void getChars(CharSequence s, int start, int end, |
| 64 | char[] dest, int destoff) { |
Gilles Debunne | 1e3ac18 | 2011-03-08 14:22:34 -0800 | [diff] [blame] | 65 | Class<? extends CharSequence> c = s.getClass(); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 66 | |
| 67 | if (c == String.class) |
| 68 | ((String) s).getChars(start, end, dest, destoff); |
| 69 | else if (c == StringBuffer.class) |
| 70 | ((StringBuffer) s).getChars(start, end, dest, destoff); |
| 71 | else if (c == StringBuilder.class) |
| 72 | ((StringBuilder) s).getChars(start, end, dest, destoff); |
| 73 | else if (s instanceof GetChars) |
| 74 | ((GetChars) s).getChars(start, end, dest, destoff); |
| 75 | else { |
| 76 | for (int i = start; i < end; i++) |
| 77 | dest[destoff++] = s.charAt(i); |
| 78 | } |
| 79 | } |
| 80 | |
| 81 | public static int indexOf(CharSequence s, char ch) { |
| 82 | return indexOf(s, ch, 0); |
| 83 | } |
| 84 | |
| 85 | public static int indexOf(CharSequence s, char ch, int start) { |
Gilles Debunne | 1e3ac18 | 2011-03-08 14:22:34 -0800 | [diff] [blame] | 86 | Class<? extends CharSequence> c = s.getClass(); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 87 | |
| 88 | if (c == String.class) |
| 89 | return ((String) s).indexOf(ch, start); |
| 90 | |
| 91 | return indexOf(s, ch, start, s.length()); |
| 92 | } |
| 93 | |
| 94 | public static int indexOf(CharSequence s, char ch, int start, int end) { |
Gilles Debunne | 1e3ac18 | 2011-03-08 14:22:34 -0800 | [diff] [blame] | 95 | Class<? extends CharSequence> c = s.getClass(); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 96 | |
| 97 | if (s instanceof GetChars || c == StringBuffer.class || |
| 98 | c == StringBuilder.class || c == String.class) { |
| 99 | final int INDEX_INCREMENT = 500; |
| 100 | char[] temp = obtain(INDEX_INCREMENT); |
| 101 | |
| 102 | while (start < end) { |
| 103 | int segend = start + INDEX_INCREMENT; |
| 104 | if (segend > end) |
| 105 | segend = end; |
| 106 | |
| 107 | getChars(s, start, segend, temp, 0); |
| 108 | |
| 109 | int count = segend - start; |
| 110 | for (int i = 0; i < count; i++) { |
| 111 | if (temp[i] == ch) { |
| 112 | recycle(temp); |
| 113 | return i + start; |
| 114 | } |
| 115 | } |
| 116 | |
| 117 | start = segend; |
| 118 | } |
| 119 | |
| 120 | recycle(temp); |
| 121 | return -1; |
| 122 | } |
| 123 | |
| 124 | for (int i = start; i < end; i++) |
| 125 | if (s.charAt(i) == ch) |
| 126 | return i; |
| 127 | |
| 128 | return -1; |
| 129 | } |
| 130 | |
| 131 | public static int lastIndexOf(CharSequence s, char ch) { |
| 132 | return lastIndexOf(s, ch, s.length() - 1); |
| 133 | } |
| 134 | |
| 135 | public static int lastIndexOf(CharSequence s, char ch, int last) { |
Gilles Debunne | 1e3ac18 | 2011-03-08 14:22:34 -0800 | [diff] [blame] | 136 | Class<? extends CharSequence> c = s.getClass(); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 137 | |
| 138 | if (c == String.class) |
| 139 | return ((String) s).lastIndexOf(ch, last); |
| 140 | |
| 141 | return lastIndexOf(s, ch, 0, last); |
| 142 | } |
| 143 | |
| 144 | public static int lastIndexOf(CharSequence s, char ch, |
| 145 | int start, int last) { |
| 146 | if (last < 0) |
| 147 | return -1; |
| 148 | if (last >= s.length()) |
| 149 | last = s.length() - 1; |
| 150 | |
| 151 | int end = last + 1; |
| 152 | |
Gilles Debunne | 1e3ac18 | 2011-03-08 14:22:34 -0800 | [diff] [blame] | 153 | Class<? extends CharSequence> c = s.getClass(); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 154 | |
| 155 | if (s instanceof GetChars || c == StringBuffer.class || |
| 156 | c == StringBuilder.class || c == String.class) { |
| 157 | final int INDEX_INCREMENT = 500; |
| 158 | char[] temp = obtain(INDEX_INCREMENT); |
| 159 | |
| 160 | while (start < end) { |
| 161 | int segstart = end - INDEX_INCREMENT; |
| 162 | if (segstart < start) |
| 163 | segstart = start; |
| 164 | |
| 165 | getChars(s, segstart, end, temp, 0); |
| 166 | |
| 167 | int count = end - segstart; |
| 168 | for (int i = count - 1; i >= 0; i--) { |
| 169 | if (temp[i] == ch) { |
| 170 | recycle(temp); |
| 171 | return i + segstart; |
| 172 | } |
| 173 | } |
| 174 | |
| 175 | end = segstart; |
| 176 | } |
| 177 | |
| 178 | recycle(temp); |
| 179 | return -1; |
| 180 | } |
| 181 | |
| 182 | for (int i = end - 1; i >= start; i--) |
| 183 | if (s.charAt(i) == ch) |
| 184 | return i; |
| 185 | |
| 186 | return -1; |
| 187 | } |
| 188 | |
| 189 | public static int indexOf(CharSequence s, CharSequence needle) { |
| 190 | return indexOf(s, needle, 0, s.length()); |
| 191 | } |
| 192 | |
| 193 | public static int indexOf(CharSequence s, CharSequence needle, int start) { |
| 194 | return indexOf(s, needle, start, s.length()); |
| 195 | } |
| 196 | |
| 197 | public static int indexOf(CharSequence s, CharSequence needle, |
| 198 | int start, int end) { |
| 199 | int nlen = needle.length(); |
| 200 | if (nlen == 0) |
| 201 | return start; |
| 202 | |
| 203 | char c = needle.charAt(0); |
| 204 | |
| 205 | for (;;) { |
| 206 | start = indexOf(s, c, start); |
| 207 | if (start > end - nlen) { |
| 208 | break; |
| 209 | } |
| 210 | |
| 211 | if (start < 0) { |
| 212 | return -1; |
| 213 | } |
| 214 | |
| 215 | if (regionMatches(s, start, needle, 0, nlen)) { |
| 216 | return start; |
| 217 | } |
| 218 | |
| 219 | start++; |
| 220 | } |
| 221 | return -1; |
| 222 | } |
| 223 | |
| 224 | public static boolean regionMatches(CharSequence one, int toffset, |
| 225 | CharSequence two, int ooffset, |
| 226 | int len) { |
| 227 | char[] temp = obtain(2 * len); |
| 228 | |
| 229 | getChars(one, toffset, toffset + len, temp, 0); |
| 230 | getChars(two, ooffset, ooffset + len, temp, len); |
| 231 | |
| 232 | boolean match = true; |
| 233 | for (int i = 0; i < len; i++) { |
| 234 | if (temp[i] != temp[i + len]) { |
| 235 | match = false; |
| 236 | break; |
| 237 | } |
| 238 | } |
| 239 | |
| 240 | recycle(temp); |
| 241 | return match; |
| 242 | } |
| 243 | |
| 244 | /** |
| 245 | * Create a new String object containing the given range of characters |
| 246 | * from the source string. This is different than simply calling |
| 247 | * {@link CharSequence#subSequence(int, int) CharSequence.subSequence} |
| 248 | * in that it does not preserve any style runs in the source sequence, |
| 249 | * allowing a more efficient implementation. |
| 250 | */ |
| 251 | public static String substring(CharSequence source, int start, int end) { |
| 252 | if (source instanceof String) |
| 253 | return ((String) source).substring(start, end); |
| 254 | if (source instanceof StringBuilder) |
| 255 | return ((StringBuilder) source).substring(start, end); |
| 256 | if (source instanceof StringBuffer) |
| 257 | return ((StringBuffer) source).substring(start, end); |
| 258 | |
| 259 | char[] temp = obtain(end - start); |
| 260 | getChars(source, start, end, temp, 0); |
| 261 | String ret = new String(temp, 0, end - start); |
| 262 | recycle(temp); |
| 263 | |
| 264 | return ret; |
| 265 | } |
| 266 | |
| 267 | /** |
Jeff Sharkey | fa4d775 | 2011-08-17 15:08:27 -0700 | [diff] [blame] | 268 | * Returns list of multiple {@link CharSequence} joined into a single |
| 269 | * {@link CharSequence} separated by localized delimiter such as ", ". |
| 270 | * |
| 271 | * @hide |
| 272 | */ |
| 273 | public static CharSequence join(Iterable<CharSequence> list) { |
| 274 | final CharSequence delimiter = Resources.getSystem().getText(R.string.list_delimeter); |
| 275 | return join(delimiter, list); |
| 276 | } |
| 277 | |
| 278 | /** |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 279 | * Returns a string containing the tokens joined by delimiters. |
| 280 | * @param tokens an array objects to be joined. Strings will be formed from |
| 281 | * the objects by calling object.toString(). |
| 282 | */ |
| 283 | public static String join(CharSequence delimiter, Object[] tokens) { |
| 284 | StringBuilder sb = new StringBuilder(); |
| 285 | boolean firstTime = true; |
| 286 | for (Object token: tokens) { |
| 287 | if (firstTime) { |
| 288 | firstTime = false; |
| 289 | } else { |
| 290 | sb.append(delimiter); |
| 291 | } |
| 292 | sb.append(token); |
| 293 | } |
| 294 | return sb.toString(); |
| 295 | } |
| 296 | |
| 297 | /** |
| 298 | * Returns a string containing the tokens joined by delimiters. |
| 299 | * @param tokens an array objects to be joined. Strings will be formed from |
| 300 | * the objects by calling object.toString(). |
| 301 | */ |
| 302 | public static String join(CharSequence delimiter, Iterable tokens) { |
| 303 | StringBuilder sb = new StringBuilder(); |
| 304 | boolean firstTime = true; |
| 305 | for (Object token: tokens) { |
| 306 | if (firstTime) { |
| 307 | firstTime = false; |
| 308 | } else { |
| 309 | sb.append(delimiter); |
| 310 | } |
| 311 | sb.append(token); |
| 312 | } |
| 313 | return sb.toString(); |
| 314 | } |
| 315 | |
| 316 | /** |
| 317 | * String.split() returns [''] when the string to be split is empty. This returns []. This does |
| 318 | * not remove any empty strings from the result. For example split("a,", "," ) returns {"a", ""}. |
| 319 | * |
| 320 | * @param text the string to split |
| 321 | * @param expression the regular expression to match |
| 322 | * @return an array of strings. The array will be empty if text is empty |
| 323 | * |
| 324 | * @throws NullPointerException if expression or text is null |
| 325 | */ |
| 326 | public static String[] split(String text, String expression) { |
| 327 | if (text.length() == 0) { |
| 328 | return EMPTY_STRING_ARRAY; |
| 329 | } else { |
| 330 | return text.split(expression, -1); |
| 331 | } |
| 332 | } |
| 333 | |
| 334 | /** |
| 335 | * Splits a string on a pattern. String.split() returns [''] when the string to be |
| 336 | * split is empty. This returns []. This does not remove any empty strings from the result. |
| 337 | * @param text the string to split |
| 338 | * @param pattern the regular expression to match |
| 339 | * @return an array of strings. The array will be empty if text is empty |
| 340 | * |
| 341 | * @throws NullPointerException if expression or text is null |
| 342 | */ |
| 343 | public static String[] split(String text, Pattern pattern) { |
| 344 | if (text.length() == 0) { |
| 345 | return EMPTY_STRING_ARRAY; |
| 346 | } else { |
| 347 | return pattern.split(text, -1); |
| 348 | } |
| 349 | } |
| 350 | |
| 351 | /** |
| 352 | * An interface for splitting strings according to rules that are opaque to the user of this |
| 353 | * interface. This also has less overhead than split, which uses regular expressions and |
| 354 | * allocates an array to hold the results. |
| 355 | * |
| 356 | * <p>The most efficient way to use this class is: |
| 357 | * |
| 358 | * <pre> |
| 359 | * // Once |
| 360 | * TextUtils.StringSplitter splitter = new TextUtils.SimpleStringSplitter(delimiter); |
| 361 | * |
| 362 | * // Once per string to split |
| 363 | * splitter.setString(string); |
| 364 | * for (String s : splitter) { |
| 365 | * ... |
| 366 | * } |
| 367 | * </pre> |
| 368 | */ |
| 369 | public interface StringSplitter extends Iterable<String> { |
| 370 | public void setString(String string); |
| 371 | } |
| 372 | |
| 373 | /** |
| 374 | * A simple string splitter. |
| 375 | * |
| 376 | * <p>If the final character in the string to split is the delimiter then no empty string will |
| 377 | * be returned for the empty string after that delimeter. That is, splitting <tt>"a,b,"</tt> on |
| 378 | * comma will return <tt>"a", "b"</tt>, not <tt>"a", "b", ""</tt>. |
| 379 | */ |
| 380 | public static class SimpleStringSplitter implements StringSplitter, Iterator<String> { |
| 381 | private String mString; |
| 382 | private char mDelimiter; |
| 383 | private int mPosition; |
| 384 | private int mLength; |
| 385 | |
| 386 | /** |
| 387 | * Initializes the splitter. setString may be called later. |
| 388 | * @param delimiter the delimeter on which to split |
| 389 | */ |
| 390 | public SimpleStringSplitter(char delimiter) { |
| 391 | mDelimiter = delimiter; |
| 392 | } |
| 393 | |
| 394 | /** |
| 395 | * Sets the string to split |
| 396 | * @param string the string to split |
| 397 | */ |
| 398 | public void setString(String string) { |
| 399 | mString = string; |
| 400 | mPosition = 0; |
| 401 | mLength = mString.length(); |
| 402 | } |
| 403 | |
| 404 | public Iterator<String> iterator() { |
| 405 | return this; |
| 406 | } |
| 407 | |
| 408 | public boolean hasNext() { |
| 409 | return mPosition < mLength; |
| 410 | } |
| 411 | |
| 412 | public String next() { |
| 413 | int end = mString.indexOf(mDelimiter, mPosition); |
| 414 | if (end == -1) { |
| 415 | end = mLength; |
| 416 | } |
| 417 | String nextString = mString.substring(mPosition, end); |
| 418 | mPosition = end + 1; // Skip the delimiter. |
| 419 | return nextString; |
| 420 | } |
| 421 | |
| 422 | public void remove() { |
| 423 | throw new UnsupportedOperationException(); |
| 424 | } |
| 425 | } |
| 426 | |
| 427 | public static CharSequence stringOrSpannedString(CharSequence source) { |
| 428 | if (source == null) |
| 429 | return null; |
| 430 | if (source instanceof SpannedString) |
| 431 | return source; |
| 432 | if (source instanceof Spanned) |
| 433 | return new SpannedString(source); |
| 434 | |
| 435 | return source.toString(); |
| 436 | } |
| 437 | |
| 438 | /** |
| 439 | * Returns true if the string is null or 0-length. |
| 440 | * @param str the string to be examined |
| 441 | * @return true if str is null or zero length |
| 442 | */ |
| 443 | public static boolean isEmpty(CharSequence str) { |
| 444 | if (str == null || str.length() == 0) |
| 445 | return true; |
| 446 | else |
| 447 | return false; |
| 448 | } |
| 449 | |
| 450 | /** |
| 451 | * Returns the length that the specified CharSequence would have if |
| 452 | * spaces and control characters were trimmed from the start and end, |
| 453 | * as by {@link String#trim}. |
| 454 | */ |
| 455 | public static int getTrimmedLength(CharSequence s) { |
| 456 | int len = s.length(); |
| 457 | |
| 458 | int start = 0; |
| 459 | while (start < len && s.charAt(start) <= ' ') { |
| 460 | start++; |
| 461 | } |
| 462 | |
| 463 | int end = len; |
| 464 | while (end > start && s.charAt(end - 1) <= ' ') { |
| 465 | end--; |
| 466 | } |
| 467 | |
| 468 | return end - start; |
| 469 | } |
| 470 | |
| 471 | /** |
| 472 | * Returns true if a and b are equal, including if they are both null. |
| 473 | * <p><i>Note: In platform versions 1.1 and earlier, this method only worked well if |
| 474 | * both the arguments were instances of String.</i></p> |
| 475 | * @param a first CharSequence to check |
| 476 | * @param b second CharSequence to check |
| 477 | * @return true if a and b are equal |
| 478 | */ |
| 479 | public static boolean equals(CharSequence a, CharSequence b) { |
| 480 | if (a == b) return true; |
| 481 | int length; |
| 482 | if (a != null && b != null && (length = a.length()) == b.length()) { |
| 483 | if (a instanceof String && b instanceof String) { |
| 484 | return a.equals(b); |
| 485 | } else { |
| 486 | for (int i = 0; i < length; i++) { |
| 487 | if (a.charAt(i) != b.charAt(i)) return false; |
| 488 | } |
| 489 | return true; |
| 490 | } |
| 491 | } |
| 492 | return false; |
| 493 | } |
| 494 | |
| 495 | // XXX currently this only reverses chars, not spans |
| 496 | public static CharSequence getReverse(CharSequence source, |
| 497 | int start, int end) { |
| 498 | return new Reverser(source, start, end); |
| 499 | } |
| 500 | |
| 501 | private static class Reverser |
| 502 | implements CharSequence, GetChars |
| 503 | { |
| 504 | public Reverser(CharSequence source, int start, int end) { |
| 505 | mSource = source; |
| 506 | mStart = start; |
| 507 | mEnd = end; |
| 508 | } |
| 509 | |
| 510 | public int length() { |
| 511 | return mEnd - mStart; |
| 512 | } |
| 513 | |
| 514 | public CharSequence subSequence(int start, int end) { |
| 515 | char[] buf = new char[end - start]; |
| 516 | |
| 517 | getChars(start, end, buf, 0); |
| 518 | return new String(buf); |
| 519 | } |
| 520 | |
Gilles Debunne | 1e3ac18 | 2011-03-08 14:22:34 -0800 | [diff] [blame] | 521 | @Override |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 522 | public String toString() { |
| 523 | return subSequence(0, length()).toString(); |
| 524 | } |
| 525 | |
| 526 | public char charAt(int off) { |
| 527 | return AndroidCharacter.getMirror(mSource.charAt(mEnd - 1 - off)); |
| 528 | } |
| 529 | |
| 530 | public void getChars(int start, int end, char[] dest, int destoff) { |
| 531 | TextUtils.getChars(mSource, start + mStart, end + mStart, |
| 532 | dest, destoff); |
| 533 | AndroidCharacter.mirror(dest, 0, end - start); |
| 534 | |
| 535 | int len = end - start; |
| 536 | int n = (end - start) / 2; |
| 537 | for (int i = 0; i < n; i++) { |
| 538 | char tmp = dest[destoff + i]; |
| 539 | |
| 540 | dest[destoff + i] = dest[destoff + len - i - 1]; |
| 541 | dest[destoff + len - i - 1] = tmp; |
| 542 | } |
| 543 | } |
| 544 | |
| 545 | private CharSequence mSource; |
| 546 | private int mStart; |
| 547 | private int mEnd; |
| 548 | } |
| 549 | |
| 550 | /** @hide */ |
| 551 | public static final int ALIGNMENT_SPAN = 1; |
| 552 | /** @hide */ |
| 553 | public static final int FOREGROUND_COLOR_SPAN = 2; |
| 554 | /** @hide */ |
| 555 | public static final int RELATIVE_SIZE_SPAN = 3; |
| 556 | /** @hide */ |
| 557 | public static final int SCALE_X_SPAN = 4; |
| 558 | /** @hide */ |
| 559 | public static final int STRIKETHROUGH_SPAN = 5; |
| 560 | /** @hide */ |
| 561 | public static final int UNDERLINE_SPAN = 6; |
| 562 | /** @hide */ |
| 563 | public static final int STYLE_SPAN = 7; |
| 564 | /** @hide */ |
| 565 | public static final int BULLET_SPAN = 8; |
| 566 | /** @hide */ |
| 567 | public static final int QUOTE_SPAN = 9; |
| 568 | /** @hide */ |
| 569 | public static final int LEADING_MARGIN_SPAN = 10; |
| 570 | /** @hide */ |
| 571 | public static final int URL_SPAN = 11; |
| 572 | /** @hide */ |
| 573 | public static final int BACKGROUND_COLOR_SPAN = 12; |
| 574 | /** @hide */ |
| 575 | public static final int TYPEFACE_SPAN = 13; |
| 576 | /** @hide */ |
| 577 | public static final int SUPERSCRIPT_SPAN = 14; |
| 578 | /** @hide */ |
| 579 | public static final int SUBSCRIPT_SPAN = 15; |
| 580 | /** @hide */ |
| 581 | public static final int ABSOLUTE_SIZE_SPAN = 16; |
| 582 | /** @hide */ |
| 583 | public static final int TEXT_APPEARANCE_SPAN = 17; |
| 584 | /** @hide */ |
| 585 | public static final int ANNOTATION = 18; |
satok | adb4358 | 2011-03-09 10:08:47 +0900 | [diff] [blame] | 586 | /** @hide */ |
Gilles Debunne | a00972a | 2011-04-13 16:07:31 -0700 | [diff] [blame] | 587 | public static final int SUGGESTION_SPAN = 19; |
Gilles Debunne | 28294cc | 2011-08-24 12:02:05 -0700 | [diff] [blame] | 588 | /** @hide */ |
| 589 | public static final int SPELL_CHECK_SPAN = 20; |
| 590 | /** @hide */ |
| 591 | public static final int SUGGESTION_RANGE_SPAN = 21; |
Luca Zanolin | e6d3682 | 2011-08-30 18:04:34 +0100 | [diff] [blame] | 592 | /** @hide */ |
| 593 | public static final int EASY_EDIT_SPAN = 22; |
Victoria Lease | df8ef4b | 2012-08-17 15:34:01 -0700 | [diff] [blame] | 594 | /** @hide */ |
| 595 | public static final int LOCALE_SPAN = 23; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 596 | |
| 597 | /** |
| 598 | * Flatten a CharSequence and whatever styles can be copied across processes |
| 599 | * into the parcel. |
| 600 | */ |
| 601 | public static void writeToParcel(CharSequence cs, Parcel p, |
| 602 | int parcelableFlags) { |
| 603 | if (cs instanceof Spanned) { |
| 604 | p.writeInt(0); |
| 605 | p.writeString(cs.toString()); |
| 606 | |
| 607 | Spanned sp = (Spanned) cs; |
| 608 | Object[] os = sp.getSpans(0, cs.length(), Object.class); |
| 609 | |
| 610 | // note to people adding to this: check more specific types |
| 611 | // before more generic types. also notice that it uses |
| 612 | // "if" instead of "else if" where there are interfaces |
| 613 | // so one object can be several. |
| 614 | |
| 615 | for (int i = 0; i < os.length; i++) { |
| 616 | Object o = os[i]; |
| 617 | Object prop = os[i]; |
| 618 | |
| 619 | if (prop instanceof CharacterStyle) { |
| 620 | prop = ((CharacterStyle) prop).getUnderlying(); |
| 621 | } |
| 622 | |
| 623 | if (prop instanceof ParcelableSpan) { |
| 624 | ParcelableSpan ps = (ParcelableSpan)prop; |
| 625 | p.writeInt(ps.getSpanTypeId()); |
| 626 | ps.writeToParcel(p, parcelableFlags); |
| 627 | writeWhere(p, sp, o); |
| 628 | } |
| 629 | } |
| 630 | |
| 631 | p.writeInt(0); |
| 632 | } else { |
| 633 | p.writeInt(1); |
| 634 | if (cs != null) { |
| 635 | p.writeString(cs.toString()); |
| 636 | } else { |
| 637 | p.writeString(null); |
| 638 | } |
| 639 | } |
| 640 | } |
| 641 | |
| 642 | private static void writeWhere(Parcel p, Spanned sp, Object o) { |
| 643 | p.writeInt(sp.getSpanStart(o)); |
| 644 | p.writeInt(sp.getSpanEnd(o)); |
| 645 | p.writeInt(sp.getSpanFlags(o)); |
| 646 | } |
| 647 | |
| 648 | public static final Parcelable.Creator<CharSequence> CHAR_SEQUENCE_CREATOR |
| 649 | = new Parcelable.Creator<CharSequence>() { |
| 650 | /** |
| 651 | * Read and return a new CharSequence, possibly with styles, |
| 652 | * from the parcel. |
| 653 | */ |
Gilles Debunne | 1e3ac18 | 2011-03-08 14:22:34 -0800 | [diff] [blame] | 654 | public CharSequence createFromParcel(Parcel p) { |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 655 | int kind = p.readInt(); |
| 656 | |
Martin Wallgren | cee2051 | 2011-04-07 14:45:43 +0200 | [diff] [blame] | 657 | String string = p.readString(); |
| 658 | if (string == null) { |
| 659 | return null; |
| 660 | } |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 661 | |
Martin Wallgren | cee2051 | 2011-04-07 14:45:43 +0200 | [diff] [blame] | 662 | if (kind == 1) { |
| 663 | return string; |
| 664 | } |
| 665 | |
| 666 | SpannableString sp = new SpannableString(string); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 667 | |
| 668 | while (true) { |
| 669 | kind = p.readInt(); |
| 670 | |
| 671 | if (kind == 0) |
| 672 | break; |
| 673 | |
| 674 | switch (kind) { |
| 675 | case ALIGNMENT_SPAN: |
| 676 | readSpan(p, sp, new AlignmentSpan.Standard(p)); |
| 677 | break; |
| 678 | |
| 679 | case FOREGROUND_COLOR_SPAN: |
| 680 | readSpan(p, sp, new ForegroundColorSpan(p)); |
| 681 | break; |
| 682 | |
| 683 | case RELATIVE_SIZE_SPAN: |
| 684 | readSpan(p, sp, new RelativeSizeSpan(p)); |
| 685 | break; |
| 686 | |
| 687 | case SCALE_X_SPAN: |
| 688 | readSpan(p, sp, new ScaleXSpan(p)); |
| 689 | break; |
| 690 | |
| 691 | case STRIKETHROUGH_SPAN: |
| 692 | readSpan(p, sp, new StrikethroughSpan(p)); |
| 693 | break; |
| 694 | |
| 695 | case UNDERLINE_SPAN: |
| 696 | readSpan(p, sp, new UnderlineSpan(p)); |
| 697 | break; |
| 698 | |
| 699 | case STYLE_SPAN: |
| 700 | readSpan(p, sp, new StyleSpan(p)); |
| 701 | break; |
| 702 | |
| 703 | case BULLET_SPAN: |
| 704 | readSpan(p, sp, new BulletSpan(p)); |
| 705 | break; |
| 706 | |
| 707 | case QUOTE_SPAN: |
| 708 | readSpan(p, sp, new QuoteSpan(p)); |
| 709 | break; |
| 710 | |
| 711 | case LEADING_MARGIN_SPAN: |
| 712 | readSpan(p, sp, new LeadingMarginSpan.Standard(p)); |
| 713 | break; |
| 714 | |
| 715 | case URL_SPAN: |
| 716 | readSpan(p, sp, new URLSpan(p)); |
| 717 | break; |
| 718 | |
| 719 | case BACKGROUND_COLOR_SPAN: |
| 720 | readSpan(p, sp, new BackgroundColorSpan(p)); |
| 721 | break; |
| 722 | |
| 723 | case TYPEFACE_SPAN: |
| 724 | readSpan(p, sp, new TypefaceSpan(p)); |
| 725 | break; |
| 726 | |
| 727 | case SUPERSCRIPT_SPAN: |
| 728 | readSpan(p, sp, new SuperscriptSpan(p)); |
| 729 | break; |
| 730 | |
| 731 | case SUBSCRIPT_SPAN: |
| 732 | readSpan(p, sp, new SubscriptSpan(p)); |
| 733 | break; |
| 734 | |
| 735 | case ABSOLUTE_SIZE_SPAN: |
| 736 | readSpan(p, sp, new AbsoluteSizeSpan(p)); |
| 737 | break; |
| 738 | |
| 739 | case TEXT_APPEARANCE_SPAN: |
| 740 | readSpan(p, sp, new TextAppearanceSpan(p)); |
| 741 | break; |
| 742 | |
| 743 | case ANNOTATION: |
| 744 | readSpan(p, sp, new Annotation(p)); |
| 745 | break; |
| 746 | |
Gilles Debunne | a00972a | 2011-04-13 16:07:31 -0700 | [diff] [blame] | 747 | case SUGGESTION_SPAN: |
| 748 | readSpan(p, sp, new SuggestionSpan(p)); |
| 749 | break; |
| 750 | |
Gilles Debunne | 28294cc | 2011-08-24 12:02:05 -0700 | [diff] [blame] | 751 | case SPELL_CHECK_SPAN: |
| 752 | readSpan(p, sp, new SpellCheckSpan(p)); |
| 753 | break; |
| 754 | |
| 755 | case SUGGESTION_RANGE_SPAN: |
Gilles Debunne | 0eea668 | 2011-08-29 13:30:31 -0700 | [diff] [blame] | 756 | readSpan(p, sp, new SuggestionRangeSpan(p)); |
Gilles Debunne | 28294cc | 2011-08-24 12:02:05 -0700 | [diff] [blame] | 757 | break; |
Gilles Debunne | e90bed1 | 2011-08-30 14:28:27 -0700 | [diff] [blame] | 758 | |
Luca Zanolin | e6d3682 | 2011-08-30 18:04:34 +0100 | [diff] [blame] | 759 | case EASY_EDIT_SPAN: |
Gilles Debunne | 0eea668 | 2011-08-29 13:30:31 -0700 | [diff] [blame] | 760 | readSpan(p, sp, new EasyEditSpan()); |
Luca Zanolin | e6d3682 | 2011-08-30 18:04:34 +0100 | [diff] [blame] | 761 | break; |
| 762 | |
Victoria Lease | df8ef4b | 2012-08-17 15:34:01 -0700 | [diff] [blame] | 763 | case LOCALE_SPAN: |
| 764 | readSpan(p, sp, new LocaleSpan(p)); |
| 765 | break; |
| 766 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 767 | default: |
| 768 | throw new RuntimeException("bogus span encoding " + kind); |
| 769 | } |
| 770 | } |
| 771 | |
| 772 | return sp; |
| 773 | } |
| 774 | |
| 775 | public CharSequence[] newArray(int size) |
| 776 | { |
| 777 | return new CharSequence[size]; |
| 778 | } |
| 779 | }; |
| 780 | |
| 781 | /** |
| 782 | * Debugging tool to print the spans in a CharSequence. The output will |
| 783 | * be printed one span per line. If the CharSequence is not a Spanned, |
| 784 | * then the entire string will be printed on a single line. |
| 785 | */ |
| 786 | public static void dumpSpans(CharSequence cs, Printer printer, String prefix) { |
| 787 | if (cs instanceof Spanned) { |
| 788 | Spanned sp = (Spanned) cs; |
| 789 | Object[] os = sp.getSpans(0, cs.length(), Object.class); |
| 790 | |
| 791 | for (int i = 0; i < os.length; i++) { |
| 792 | Object o = os[i]; |
| 793 | printer.println(prefix + cs.subSequence(sp.getSpanStart(o), |
| 794 | sp.getSpanEnd(o)) + ": " |
| 795 | + Integer.toHexString(System.identityHashCode(o)) |
| 796 | + " " + o.getClass().getCanonicalName() |
| 797 | + " (" + sp.getSpanStart(o) + "-" + sp.getSpanEnd(o) |
| 798 | + ") fl=#" + sp.getSpanFlags(o)); |
| 799 | } |
| 800 | } else { |
| 801 | printer.println(prefix + cs + ": (no spans)"); |
| 802 | } |
| 803 | } |
| 804 | |
| 805 | /** |
| 806 | * Return a new CharSequence in which each of the source strings is |
| 807 | * replaced by the corresponding element of the destinations. |
| 808 | */ |
| 809 | public static CharSequence replace(CharSequence template, |
| 810 | String[] sources, |
| 811 | CharSequence[] destinations) { |
| 812 | SpannableStringBuilder tb = new SpannableStringBuilder(template); |
| 813 | |
| 814 | for (int i = 0; i < sources.length; i++) { |
| 815 | int where = indexOf(tb, sources[i]); |
| 816 | |
| 817 | if (where >= 0) |
| 818 | tb.setSpan(sources[i], where, where + sources[i].length(), |
Gilles Debunne | 1e3ac18 | 2011-03-08 14:22:34 -0800 | [diff] [blame] | 819 | Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 820 | } |
| 821 | |
| 822 | for (int i = 0; i < sources.length; i++) { |
| 823 | int start = tb.getSpanStart(sources[i]); |
| 824 | int end = tb.getSpanEnd(sources[i]); |
| 825 | |
| 826 | if (start >= 0) { |
| 827 | tb.replace(start, end, destinations[i]); |
| 828 | } |
| 829 | } |
| 830 | |
| 831 | return tb; |
| 832 | } |
| 833 | |
| 834 | /** |
| 835 | * Replace instances of "^1", "^2", etc. in the |
| 836 | * <code>template</code> CharSequence with the corresponding |
| 837 | * <code>values</code>. "^^" is used to produce a single caret in |
| 838 | * the output. Only up to 9 replacement values are supported, |
| 839 | * "^10" will be produce the first replacement value followed by a |
| 840 | * '0'. |
| 841 | * |
| 842 | * @param template the input text containing "^1"-style |
| 843 | * placeholder values. This object is not modified; a copy is |
| 844 | * returned. |
| 845 | * |
| 846 | * @param values CharSequences substituted into the template. The |
| 847 | * first is substituted for "^1", the second for "^2", and so on. |
| 848 | * |
| 849 | * @return the new CharSequence produced by doing the replacement |
| 850 | * |
| 851 | * @throws IllegalArgumentException if the template requests a |
| 852 | * value that was not provided, or if more than 9 values are |
| 853 | * provided. |
| 854 | */ |
| 855 | public static CharSequence expandTemplate(CharSequence template, |
| 856 | CharSequence... values) { |
| 857 | if (values.length > 9) { |
| 858 | throw new IllegalArgumentException("max of 9 values are supported"); |
| 859 | } |
| 860 | |
| 861 | SpannableStringBuilder ssb = new SpannableStringBuilder(template); |
| 862 | |
| 863 | try { |
| 864 | int i = 0; |
| 865 | while (i < ssb.length()) { |
| 866 | if (ssb.charAt(i) == '^') { |
| 867 | char next = ssb.charAt(i+1); |
| 868 | if (next == '^') { |
| 869 | ssb.delete(i+1, i+2); |
| 870 | ++i; |
| 871 | continue; |
| 872 | } else if (Character.isDigit(next)) { |
| 873 | int which = Character.getNumericValue(next) - 1; |
| 874 | if (which < 0) { |
| 875 | throw new IllegalArgumentException( |
| 876 | "template requests value ^" + (which+1)); |
| 877 | } |
| 878 | if (which >= values.length) { |
| 879 | throw new IllegalArgumentException( |
| 880 | "template requests value ^" + (which+1) + |
| 881 | "; only " + values.length + " provided"); |
| 882 | } |
| 883 | ssb.replace(i, i+2, values[which]); |
| 884 | i += values[which].length(); |
| 885 | continue; |
| 886 | } |
| 887 | } |
| 888 | ++i; |
| 889 | } |
| 890 | } catch (IndexOutOfBoundsException ignore) { |
| 891 | // happens when ^ is the last character in the string. |
| 892 | } |
| 893 | return ssb; |
| 894 | } |
| 895 | |
| 896 | public static int getOffsetBefore(CharSequence text, int offset) { |
| 897 | if (offset == 0) |
| 898 | return 0; |
| 899 | if (offset == 1) |
| 900 | return 0; |
| 901 | |
| 902 | char c = text.charAt(offset - 1); |
| 903 | |
| 904 | if (c >= '\uDC00' && c <= '\uDFFF') { |
| 905 | char c1 = text.charAt(offset - 2); |
| 906 | |
| 907 | if (c1 >= '\uD800' && c1 <= '\uDBFF') |
| 908 | offset -= 2; |
| 909 | else |
| 910 | offset -= 1; |
| 911 | } else { |
| 912 | offset -= 1; |
| 913 | } |
| 914 | |
| 915 | if (text instanceof Spanned) { |
| 916 | ReplacementSpan[] spans = ((Spanned) text).getSpans(offset, offset, |
| 917 | ReplacementSpan.class); |
| 918 | |
| 919 | for (int i = 0; i < spans.length; i++) { |
| 920 | int start = ((Spanned) text).getSpanStart(spans[i]); |
| 921 | int end = ((Spanned) text).getSpanEnd(spans[i]); |
| 922 | |
| 923 | if (start < offset && end > offset) |
| 924 | offset = start; |
| 925 | } |
| 926 | } |
| 927 | |
| 928 | return offset; |
| 929 | } |
| 930 | |
| 931 | public static int getOffsetAfter(CharSequence text, int offset) { |
| 932 | int len = text.length(); |
| 933 | |
| 934 | if (offset == len) |
| 935 | return len; |
| 936 | if (offset == len - 1) |
| 937 | return len; |
| 938 | |
| 939 | char c = text.charAt(offset); |
| 940 | |
| 941 | if (c >= '\uD800' && c <= '\uDBFF') { |
| 942 | char c1 = text.charAt(offset + 1); |
| 943 | |
| 944 | if (c1 >= '\uDC00' && c1 <= '\uDFFF') |
| 945 | offset += 2; |
| 946 | else |
| 947 | offset += 1; |
| 948 | } else { |
| 949 | offset += 1; |
| 950 | } |
| 951 | |
| 952 | if (text instanceof Spanned) { |
| 953 | ReplacementSpan[] spans = ((Spanned) text).getSpans(offset, offset, |
| 954 | ReplacementSpan.class); |
| 955 | |
| 956 | for (int i = 0; i < spans.length; i++) { |
| 957 | int start = ((Spanned) text).getSpanStart(spans[i]); |
| 958 | int end = ((Spanned) text).getSpanEnd(spans[i]); |
| 959 | |
| 960 | if (start < offset && end > offset) |
| 961 | offset = end; |
| 962 | } |
| 963 | } |
| 964 | |
| 965 | return offset; |
| 966 | } |
| 967 | |
| 968 | private static void readSpan(Parcel p, Spannable sp, Object o) { |
| 969 | sp.setSpan(o, p.readInt(), p.readInt(), p.readInt()); |
| 970 | } |
| 971 | |
Daisuke Miyakawa | c1d2748 | 2009-05-25 17:37:41 +0900 | [diff] [blame] | 972 | /** |
| 973 | * Copies the spans from the region <code>start...end</code> in |
| 974 | * <code>source</code> to the region |
| 975 | * <code>destoff...destoff+end-start</code> in <code>dest</code>. |
| 976 | * Spans in <code>source</code> that begin before <code>start</code> |
| 977 | * or end after <code>end</code> but overlap this range are trimmed |
| 978 | * as if they began at <code>start</code> or ended at <code>end</code>. |
| 979 | * |
| 980 | * @throws IndexOutOfBoundsException if any of the copied spans |
| 981 | * are out of range in <code>dest</code>. |
| 982 | */ |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 983 | public static void copySpansFrom(Spanned source, int start, int end, |
| 984 | Class kind, |
| 985 | Spannable dest, int destoff) { |
| 986 | if (kind == null) { |
| 987 | kind = Object.class; |
| 988 | } |
| 989 | |
| 990 | Object[] spans = source.getSpans(start, end, kind); |
| 991 | |
| 992 | for (int i = 0; i < spans.length; i++) { |
| 993 | int st = source.getSpanStart(spans[i]); |
| 994 | int en = source.getSpanEnd(spans[i]); |
| 995 | int fl = source.getSpanFlags(spans[i]); |
| 996 | |
| 997 | if (st < start) |
| 998 | st = start; |
| 999 | if (en > end) |
| 1000 | en = end; |
| 1001 | |
| 1002 | dest.setSpan(spans[i], st - start + destoff, en - start + destoff, |
| 1003 | fl); |
| 1004 | } |
| 1005 | } |
| 1006 | |
| 1007 | public enum TruncateAt { |
| 1008 | START, |
| 1009 | MIDDLE, |
| 1010 | END, |
| 1011 | MARQUEE, |
Fabrice Di Meglio | cb33264 | 2011-09-23 19:08:04 -0700 | [diff] [blame] | 1012 | /** |
| 1013 | * @hide |
| 1014 | */ |
| 1015 | END_SMALL |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1016 | } |
| 1017 | |
| 1018 | public interface EllipsizeCallback { |
| 1019 | /** |
| 1020 | * This method is called to report that the specified region of |
| 1021 | * text was ellipsized away by a call to {@link #ellipsize}. |
| 1022 | */ |
| 1023 | public void ellipsized(int start, int end); |
| 1024 | } |
| 1025 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1026 | /** |
| 1027 | * Returns the original text if it fits in the specified width |
| 1028 | * given the properties of the specified Paint, |
| 1029 | * or, if it does not fit, a truncated |
| 1030 | * copy with ellipsis character added at the specified edge or center. |
| 1031 | */ |
| 1032 | public static CharSequence ellipsize(CharSequence text, |
| 1033 | TextPaint p, |
| 1034 | float avail, TruncateAt where) { |
| 1035 | return ellipsize(text, p, avail, where, false, null); |
| 1036 | } |
| 1037 | |
| 1038 | /** |
| 1039 | * Returns the original text if it fits in the specified width |
| 1040 | * given the properties of the specified Paint, |
Doug Felt | e8e45f2 | 2010-03-29 14:58:40 -0700 | [diff] [blame] | 1041 | * or, if it does not fit, a copy with ellipsis character added |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1042 | * at the specified edge or center. |
| 1043 | * If <code>preserveLength</code> is specified, the returned copy |
| 1044 | * will be padded with zero-width spaces to preserve the original |
| 1045 | * length and offsets instead of truncating. |
| 1046 | * If <code>callback</code> is non-null, it will be called to |
Doug Felt | cb379120 | 2011-07-07 11:57:48 -0700 | [diff] [blame] | 1047 | * report the start and end of the ellipsized range. TextDirection |
| 1048 | * is determined by the first strong directional character. |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1049 | */ |
| 1050 | public static CharSequence ellipsize(CharSequence text, |
Doug Felt | e8e45f2 | 2010-03-29 14:58:40 -0700 | [diff] [blame] | 1051 | TextPaint paint, |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1052 | float avail, TruncateAt where, |
| 1053 | boolean preserveLength, |
| 1054 | EllipsizeCallback callback) { |
Fabrice Di Meglio | f3e6410 | 2012-07-31 13:39:06 -0700 | [diff] [blame] | 1055 | |
| 1056 | final String ellipsis = (where == TruncateAt.END_SMALL) ? |
| 1057 | Resources.getSystem().getString(R.string.ellipsis_two_dots) : |
| 1058 | Resources.getSystem().getString(R.string.ellipsis); |
| 1059 | |
Doug Felt | cb379120 | 2011-07-07 11:57:48 -0700 | [diff] [blame] | 1060 | return ellipsize(text, paint, avail, where, preserveLength, callback, |
Fabrice Di Meglio | cb33264 | 2011-09-23 19:08:04 -0700 | [diff] [blame] | 1061 | TextDirectionHeuristics.FIRSTSTRONG_LTR, |
Fabrice Di Meglio | f3e6410 | 2012-07-31 13:39:06 -0700 | [diff] [blame] | 1062 | ellipsis); |
Doug Felt | cb379120 | 2011-07-07 11:57:48 -0700 | [diff] [blame] | 1063 | } |
| 1064 | |
| 1065 | /** |
| 1066 | * Returns the original text if it fits in the specified width |
| 1067 | * given the properties of the specified Paint, |
| 1068 | * or, if it does not fit, a copy with ellipsis character added |
| 1069 | * at the specified edge or center. |
| 1070 | * If <code>preserveLength</code> is specified, the returned copy |
| 1071 | * will be padded with zero-width spaces to preserve the original |
| 1072 | * length and offsets instead of truncating. |
| 1073 | * If <code>callback</code> is non-null, it will be called to |
| 1074 | * report the start and end of the ellipsized range. |
| 1075 | * |
| 1076 | * @hide |
| 1077 | */ |
| 1078 | public static CharSequence ellipsize(CharSequence text, |
| 1079 | TextPaint paint, |
| 1080 | float avail, TruncateAt where, |
| 1081 | boolean preserveLength, |
| 1082 | EllipsizeCallback callback, |
Fabrice Di Meglio | cb33264 | 2011-09-23 19:08:04 -0700 | [diff] [blame] | 1083 | TextDirectionHeuristic textDir, String ellipsis) { |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1084 | |
| 1085 | int len = text.length(); |
| 1086 | |
Doug Felt | e8e45f2 | 2010-03-29 14:58:40 -0700 | [diff] [blame] | 1087 | MeasuredText mt = MeasuredText.obtain(); |
| 1088 | try { |
Doug Felt | cb379120 | 2011-07-07 11:57:48 -0700 | [diff] [blame] | 1089 | float width = setPara(mt, paint, text, 0, text.length(), textDir); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1090 | |
Doug Felt | e8e45f2 | 2010-03-29 14:58:40 -0700 | [diff] [blame] | 1091 | if (width <= avail) { |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1092 | if (callback != null) { |
| 1093 | callback.ellipsized(0, 0); |
| 1094 | } |
| 1095 | |
| 1096 | return text; |
| 1097 | } |
| 1098 | |
Doug Felt | e8e45f2 | 2010-03-29 14:58:40 -0700 | [diff] [blame] | 1099 | // XXX assumes ellipsis string does not require shaping and |
| 1100 | // is unaffected by style |
Fabrice Di Meglio | cb33264 | 2011-09-23 19:08:04 -0700 | [diff] [blame] | 1101 | float ellipsiswid = paint.measureText(ellipsis); |
Doug Felt | e8e45f2 | 2010-03-29 14:58:40 -0700 | [diff] [blame] | 1102 | avail -= ellipsiswid; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1103 | |
Doug Felt | e8e45f2 | 2010-03-29 14:58:40 -0700 | [diff] [blame] | 1104 | int left = 0; |
| 1105 | int right = len; |
| 1106 | if (avail < 0) { |
| 1107 | // it all goes |
| 1108 | } else if (where == TruncateAt.START) { |
Gilles Debunne | c70e7a0 | 2012-02-23 18:05:55 -0800 | [diff] [blame] | 1109 | right = len - mt.breakText(len, false, avail); |
Fabrice Di Meglio | cb33264 | 2011-09-23 19:08:04 -0700 | [diff] [blame] | 1110 | } else if (where == TruncateAt.END || where == TruncateAt.END_SMALL) { |
Gilles Debunne | c70e7a0 | 2012-02-23 18:05:55 -0800 | [diff] [blame] | 1111 | left = mt.breakText(len, true, avail); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1112 | } else { |
Gilles Debunne | c70e7a0 | 2012-02-23 18:05:55 -0800 | [diff] [blame] | 1113 | right = len - mt.breakText(len, false, avail / 2); |
Doug Felt | e8e45f2 | 2010-03-29 14:58:40 -0700 | [diff] [blame] | 1114 | avail -= mt.measure(right, len); |
Gilles Debunne | c70e7a0 | 2012-02-23 18:05:55 -0800 | [diff] [blame] | 1115 | left = mt.breakText(right, true, avail); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1116 | } |
| 1117 | |
| 1118 | if (callback != null) { |
| 1119 | callback.ellipsized(left, right); |
| 1120 | } |
| 1121 | |
Doug Felt | e8e45f2 | 2010-03-29 14:58:40 -0700 | [diff] [blame] | 1122 | char[] buf = mt.mChars; |
| 1123 | Spanned sp = text instanceof Spanned ? (Spanned) text : null; |
| 1124 | |
| 1125 | int remaining = len - (right - left); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1126 | if (preserveLength) { |
Doug Felt | e8e45f2 | 2010-03-29 14:58:40 -0700 | [diff] [blame] | 1127 | if (remaining > 0) { // else eliminate the ellipsis too |
Fabrice Di Meglio | cb33264 | 2011-09-23 19:08:04 -0700 | [diff] [blame] | 1128 | buf[left++] = ellipsis.charAt(0); |
Doug Felt | e8e45f2 | 2010-03-29 14:58:40 -0700 | [diff] [blame] | 1129 | } |
| 1130 | for (int i = left; i < right; i++) { |
Fabrice Di Meglio | cb33264 | 2011-09-23 19:08:04 -0700 | [diff] [blame] | 1131 | buf[i] = ZWNBS_CHAR; |
Doug Felt | e8e45f2 | 2010-03-29 14:58:40 -0700 | [diff] [blame] | 1132 | } |
| 1133 | String s = new String(buf, 0, len); |
| 1134 | if (sp == null) { |
| 1135 | return s; |
| 1136 | } |
| 1137 | SpannableString ss = new SpannableString(s); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1138 | copySpansFrom(sp, 0, len, Object.class, ss, 0); |
| 1139 | return ss; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1140 | } |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1141 | |
Doug Felt | e8e45f2 | 2010-03-29 14:58:40 -0700 | [diff] [blame] | 1142 | if (remaining == 0) { |
| 1143 | return ""; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1144 | } |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1145 | |
Doug Felt | e8e45f2 | 2010-03-29 14:58:40 -0700 | [diff] [blame] | 1146 | if (sp == null) { |
Fabrice Di Meglio | cb33264 | 2011-09-23 19:08:04 -0700 | [diff] [blame] | 1147 | StringBuilder sb = new StringBuilder(remaining + ellipsis.length()); |
Doug Felt | e8e45f2 | 2010-03-29 14:58:40 -0700 | [diff] [blame] | 1148 | sb.append(buf, 0, left); |
Fabrice Di Meglio | cb33264 | 2011-09-23 19:08:04 -0700 | [diff] [blame] | 1149 | sb.append(ellipsis); |
Doug Felt | e8e45f2 | 2010-03-29 14:58:40 -0700 | [diff] [blame] | 1150 | sb.append(buf, right, len - right); |
| 1151 | return sb.toString(); |
| 1152 | } |
| 1153 | |
| 1154 | SpannableStringBuilder ssb = new SpannableStringBuilder(); |
| 1155 | ssb.append(text, 0, left); |
Fabrice Di Meglio | cb33264 | 2011-09-23 19:08:04 -0700 | [diff] [blame] | 1156 | ssb.append(ellipsis); |
Doug Felt | e8e45f2 | 2010-03-29 14:58:40 -0700 | [diff] [blame] | 1157 | ssb.append(text, right, len); |
| 1158 | return ssb; |
| 1159 | } finally { |
| 1160 | MeasuredText.recycle(mt); |
| 1161 | } |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1162 | } |
| 1163 | |
| 1164 | /** |
| 1165 | * Converts a CharSequence of the comma-separated form "Andy, Bob, |
| 1166 | * Charles, David" that is too wide to fit into the specified width |
| 1167 | * into one like "Andy, Bob, 2 more". |
| 1168 | * |
| 1169 | * @param text the text to truncate |
| 1170 | * @param p the Paint with which to measure the text |
| 1171 | * @param avail the horizontal width available for the text |
| 1172 | * @param oneMore the string for "1 more" in the current locale |
| 1173 | * @param more the string for "%d more" in the current locale |
| 1174 | */ |
| 1175 | public static CharSequence commaEllipsize(CharSequence text, |
| 1176 | TextPaint p, float avail, |
| 1177 | String oneMore, |
| 1178 | String more) { |
Doug Felt | cb379120 | 2011-07-07 11:57:48 -0700 | [diff] [blame] | 1179 | return commaEllipsize(text, p, avail, oneMore, more, |
| 1180 | TextDirectionHeuristics.FIRSTSTRONG_LTR); |
| 1181 | } |
| 1182 | |
| 1183 | /** |
| 1184 | * @hide |
| 1185 | */ |
| 1186 | public static CharSequence commaEllipsize(CharSequence text, TextPaint p, |
| 1187 | float avail, String oneMore, String more, TextDirectionHeuristic textDir) { |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1188 | |
Doug Felt | e8e45f2 | 2010-03-29 14:58:40 -0700 | [diff] [blame] | 1189 | MeasuredText mt = MeasuredText.obtain(); |
| 1190 | try { |
| 1191 | int len = text.length(); |
Doug Felt | cb379120 | 2011-07-07 11:57:48 -0700 | [diff] [blame] | 1192 | float width = setPara(mt, p, text, 0, len, textDir); |
Doug Felt | e8e45f2 | 2010-03-29 14:58:40 -0700 | [diff] [blame] | 1193 | if (width <= avail) { |
| 1194 | return text; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1195 | } |
| 1196 | |
Doug Felt | e8e45f2 | 2010-03-29 14:58:40 -0700 | [diff] [blame] | 1197 | char[] buf = mt.mChars; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1198 | |
Doug Felt | e8e45f2 | 2010-03-29 14:58:40 -0700 | [diff] [blame] | 1199 | int commaCount = 0; |
| 1200 | for (int i = 0; i < len; i++) { |
| 1201 | if (buf[i] == ',') { |
| 1202 | commaCount++; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1203 | } |
| 1204 | } |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1205 | |
Doug Felt | e8e45f2 | 2010-03-29 14:58:40 -0700 | [diff] [blame] | 1206 | int remaining = commaCount + 1; |
| 1207 | |
| 1208 | int ok = 0; |
Doug Felt | e8e45f2 | 2010-03-29 14:58:40 -0700 | [diff] [blame] | 1209 | String okFormat = ""; |
| 1210 | |
| 1211 | int w = 0; |
| 1212 | int count = 0; |
| 1213 | float[] widths = mt.mWidths; |
| 1214 | |
Doug Felt | e8e45f2 | 2010-03-29 14:58:40 -0700 | [diff] [blame] | 1215 | MeasuredText tempMt = MeasuredText.obtain(); |
| 1216 | for (int i = 0; i < len; i++) { |
| 1217 | w += widths[i]; |
| 1218 | |
| 1219 | if (buf[i] == ',') { |
| 1220 | count++; |
| 1221 | |
| 1222 | String format; |
| 1223 | // XXX should not insert spaces, should be part of string |
| 1224 | // XXX should use plural rules and not assume English plurals |
| 1225 | if (--remaining == 1) { |
| 1226 | format = " " + oneMore; |
| 1227 | } else { |
| 1228 | format = " " + String.format(more, remaining); |
| 1229 | } |
| 1230 | |
| 1231 | // XXX this is probably ok, but need to look at it more |
Doug Felt | cb379120 | 2011-07-07 11:57:48 -0700 | [diff] [blame] | 1232 | tempMt.setPara(format, 0, format.length(), textDir); |
Brian Muramatsu | 4c8ad6e | 2011-01-27 18:13:39 -0800 | [diff] [blame] | 1233 | float moreWid = tempMt.addStyleRun(p, tempMt.mLen, null); |
Doug Felt | e8e45f2 | 2010-03-29 14:58:40 -0700 | [diff] [blame] | 1234 | |
| 1235 | if (w + moreWid <= avail) { |
| 1236 | ok = i + 1; |
Doug Felt | e8e45f2 | 2010-03-29 14:58:40 -0700 | [diff] [blame] | 1237 | okFormat = format; |
| 1238 | } |
| 1239 | } |
| 1240 | } |
| 1241 | MeasuredText.recycle(tempMt); |
| 1242 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1243 | SpannableStringBuilder out = new SpannableStringBuilder(okFormat); |
| 1244 | out.insert(0, text, 0, ok); |
| 1245 | return out; |
Doug Felt | e8e45f2 | 2010-03-29 14:58:40 -0700 | [diff] [blame] | 1246 | } finally { |
| 1247 | MeasuredText.recycle(mt); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1248 | } |
| 1249 | } |
| 1250 | |
Doug Felt | e8e45f2 | 2010-03-29 14:58:40 -0700 | [diff] [blame] | 1251 | private static float setPara(MeasuredText mt, TextPaint paint, |
Doug Felt | cb379120 | 2011-07-07 11:57:48 -0700 | [diff] [blame] | 1252 | CharSequence text, int start, int end, TextDirectionHeuristic textDir) { |
Doug Felt | e8e45f2 | 2010-03-29 14:58:40 -0700 | [diff] [blame] | 1253 | |
Doug Felt | cb379120 | 2011-07-07 11:57:48 -0700 | [diff] [blame] | 1254 | mt.setPara(text, start, end, textDir); |
Doug Felt | e8e45f2 | 2010-03-29 14:58:40 -0700 | [diff] [blame] | 1255 | |
| 1256 | float width; |
| 1257 | Spanned sp = text instanceof Spanned ? (Spanned) text : null; |
| 1258 | int len = end - start; |
| 1259 | if (sp == null) { |
| 1260 | width = mt.addStyleRun(paint, len, null); |
| 1261 | } else { |
| 1262 | width = 0; |
| 1263 | int spanEnd; |
| 1264 | for (int spanStart = 0; spanStart < len; spanStart = spanEnd) { |
| 1265 | spanEnd = sp.nextSpanTransition(spanStart, len, |
| 1266 | MetricAffectingSpan.class); |
| 1267 | MetricAffectingSpan[] spans = sp.getSpans( |
| 1268 | spanStart, spanEnd, MetricAffectingSpan.class); |
Gilles Debunne | 1e3ac18 | 2011-03-08 14:22:34 -0800 | [diff] [blame] | 1269 | spans = TextUtils.removeEmptySpans(spans, sp, MetricAffectingSpan.class); |
Doug Felt | e8e45f2 | 2010-03-29 14:58:40 -0700 | [diff] [blame] | 1270 | width += mt.addStyleRun(paint, spans, spanEnd - spanStart, null); |
| 1271 | } |
| 1272 | } |
| 1273 | |
| 1274 | return width; |
| 1275 | } |
| 1276 | |
| 1277 | private static final char FIRST_RIGHT_TO_LEFT = '\u0590'; |
| 1278 | |
| 1279 | /* package */ |
| 1280 | static boolean doesNotNeedBidi(CharSequence s, int start, int end) { |
| 1281 | for (int i = start; i < end; i++) { |
| 1282 | if (s.charAt(i) >= FIRST_RIGHT_TO_LEFT) { |
| 1283 | return false; |
| 1284 | } |
| 1285 | } |
| 1286 | return true; |
| 1287 | } |
| 1288 | |
| 1289 | /* package */ |
| 1290 | static boolean doesNotNeedBidi(char[] text, int start, int len) { |
| 1291 | for (int i = start, e = i + len; i < e; i++) { |
| 1292 | if (text[i] >= FIRST_RIGHT_TO_LEFT) { |
| 1293 | return false; |
| 1294 | } |
| 1295 | } |
| 1296 | return true; |
| 1297 | } |
| 1298 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1299 | /* package */ static char[] obtain(int len) { |
| 1300 | char[] buf; |
| 1301 | |
| 1302 | synchronized (sLock) { |
| 1303 | buf = sTemp; |
| 1304 | sTemp = null; |
| 1305 | } |
| 1306 | |
| 1307 | if (buf == null || buf.length < len) |
| 1308 | buf = new char[ArrayUtils.idealCharArraySize(len)]; |
| 1309 | |
| 1310 | return buf; |
| 1311 | } |
| 1312 | |
| 1313 | /* package */ static void recycle(char[] temp) { |
| 1314 | if (temp.length > 1000) |
| 1315 | return; |
| 1316 | |
| 1317 | synchronized (sLock) { |
| 1318 | sTemp = temp; |
| 1319 | } |
| 1320 | } |
| 1321 | |
| 1322 | /** |
| 1323 | * Html-encode the string. |
| 1324 | * @param s the string to be encoded |
| 1325 | * @return the encoded string |
| 1326 | */ |
| 1327 | public static String htmlEncode(String s) { |
| 1328 | StringBuilder sb = new StringBuilder(); |
| 1329 | char c; |
| 1330 | for (int i = 0; i < s.length(); i++) { |
| 1331 | c = s.charAt(i); |
| 1332 | switch (c) { |
| 1333 | case '<': |
| 1334 | sb.append("<"); //$NON-NLS-1$ |
| 1335 | break; |
| 1336 | case '>': |
| 1337 | sb.append(">"); //$NON-NLS-1$ |
| 1338 | break; |
| 1339 | case '&': |
| 1340 | sb.append("&"); //$NON-NLS-1$ |
| 1341 | break; |
| 1342 | case '\'': |
Marc Blank | f4832da | 2012-02-13 10:11:50 -0800 | [diff] [blame] | 1343 | //http://www.w3.org/TR/xhtml1 |
| 1344 | // The named character reference ' (the apostrophe, U+0027) was introduced in |
| 1345 | // XML 1.0 but does not appear in HTML. Authors should therefore use ' instead |
| 1346 | // of ' to work as expected in HTML 4 user agents. |
| 1347 | sb.append("'"); //$NON-NLS-1$ |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1348 | break; |
| 1349 | case '"': |
| 1350 | sb.append("""); //$NON-NLS-1$ |
| 1351 | break; |
| 1352 | default: |
| 1353 | sb.append(c); |
| 1354 | } |
| 1355 | } |
| 1356 | return sb.toString(); |
| 1357 | } |
| 1358 | |
| 1359 | /** |
| 1360 | * Returns a CharSequence concatenating the specified CharSequences, |
| 1361 | * retaining their spans if any. |
| 1362 | */ |
| 1363 | public static CharSequence concat(CharSequence... text) { |
| 1364 | if (text.length == 0) { |
| 1365 | return ""; |
| 1366 | } |
| 1367 | |
| 1368 | if (text.length == 1) { |
| 1369 | return text[0]; |
| 1370 | } |
| 1371 | |
| 1372 | boolean spanned = false; |
| 1373 | for (int i = 0; i < text.length; i++) { |
| 1374 | if (text[i] instanceof Spanned) { |
| 1375 | spanned = true; |
| 1376 | break; |
| 1377 | } |
| 1378 | } |
| 1379 | |
| 1380 | StringBuilder sb = new StringBuilder(); |
| 1381 | for (int i = 0; i < text.length; i++) { |
| 1382 | sb.append(text[i]); |
| 1383 | } |
| 1384 | |
| 1385 | if (!spanned) { |
| 1386 | return sb.toString(); |
| 1387 | } |
| 1388 | |
| 1389 | SpannableString ss = new SpannableString(sb); |
| 1390 | int off = 0; |
| 1391 | for (int i = 0; i < text.length; i++) { |
| 1392 | int len = text[i].length(); |
| 1393 | |
| 1394 | if (text[i] instanceof Spanned) { |
| 1395 | copySpansFrom((Spanned) text[i], 0, len, Object.class, ss, off); |
| 1396 | } |
| 1397 | |
| 1398 | off += len; |
| 1399 | } |
| 1400 | |
| 1401 | return new SpannedString(ss); |
| 1402 | } |
| 1403 | |
| 1404 | /** |
| 1405 | * Returns whether the given CharSequence contains any printable characters. |
| 1406 | */ |
| 1407 | public static boolean isGraphic(CharSequence str) { |
| 1408 | final int len = str.length(); |
| 1409 | for (int i=0; i<len; i++) { |
| 1410 | int gc = Character.getType(str.charAt(i)); |
| 1411 | if (gc != Character.CONTROL |
| 1412 | && gc != Character.FORMAT |
| 1413 | && gc != Character.SURROGATE |
| 1414 | && gc != Character.UNASSIGNED |
| 1415 | && gc != Character.LINE_SEPARATOR |
| 1416 | && gc != Character.PARAGRAPH_SEPARATOR |
| 1417 | && gc != Character.SPACE_SEPARATOR) { |
| 1418 | return true; |
| 1419 | } |
| 1420 | } |
| 1421 | return false; |
| 1422 | } |
| 1423 | |
| 1424 | /** |
| 1425 | * Returns whether this character is a printable character. |
| 1426 | */ |
| 1427 | public static boolean isGraphic(char c) { |
| 1428 | int gc = Character.getType(c); |
| 1429 | return gc != Character.CONTROL |
| 1430 | && gc != Character.FORMAT |
| 1431 | && gc != Character.SURROGATE |
| 1432 | && gc != Character.UNASSIGNED |
| 1433 | && gc != Character.LINE_SEPARATOR |
| 1434 | && gc != Character.PARAGRAPH_SEPARATOR |
| 1435 | && gc != Character.SPACE_SEPARATOR; |
| 1436 | } |
| 1437 | |
| 1438 | /** |
| 1439 | * Returns whether the given CharSequence contains only digits. |
| 1440 | */ |
| 1441 | public static boolean isDigitsOnly(CharSequence str) { |
| 1442 | final int len = str.length(); |
| 1443 | for (int i = 0; i < len; i++) { |
| 1444 | if (!Character.isDigit(str.charAt(i))) { |
| 1445 | return false; |
| 1446 | } |
| 1447 | } |
| 1448 | return true; |
| 1449 | } |
| 1450 | |
| 1451 | /** |
Daisuke Miyakawa | 973afa9 | 2009-12-03 10:43:45 +0900 | [diff] [blame] | 1452 | * @hide |
| 1453 | */ |
| 1454 | public static boolean isPrintableAscii(final char c) { |
| 1455 | final int asciiFirst = 0x20; |
| 1456 | final int asciiLast = 0x7E; // included |
| 1457 | return (asciiFirst <= c && c <= asciiLast) || c == '\r' || c == '\n'; |
| 1458 | } |
| 1459 | |
| 1460 | /** |
| 1461 | * @hide |
| 1462 | */ |
| 1463 | public static boolean isPrintableAsciiOnly(final CharSequence str) { |
| 1464 | final int len = str.length(); |
| 1465 | for (int i = 0; i < len; i++) { |
| 1466 | if (!isPrintableAscii(str.charAt(i))) { |
| 1467 | return false; |
| 1468 | } |
| 1469 | } |
| 1470 | return true; |
| 1471 | } |
| 1472 | |
| 1473 | /** |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1474 | * Capitalization mode for {@link #getCapsMode}: capitalize all |
| 1475 | * characters. This value is explicitly defined to be the same as |
| 1476 | * {@link InputType#TYPE_TEXT_FLAG_CAP_CHARACTERS}. |
| 1477 | */ |
| 1478 | public static final int CAP_MODE_CHARACTERS |
| 1479 | = InputType.TYPE_TEXT_FLAG_CAP_CHARACTERS; |
Doug Felt | e8e45f2 | 2010-03-29 14:58:40 -0700 | [diff] [blame] | 1480 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1481 | /** |
| 1482 | * Capitalization mode for {@link #getCapsMode}: capitalize the first |
| 1483 | * character of all words. This value is explicitly defined to be the same as |
| 1484 | * {@link InputType#TYPE_TEXT_FLAG_CAP_WORDS}. |
| 1485 | */ |
| 1486 | public static final int CAP_MODE_WORDS |
| 1487 | = InputType.TYPE_TEXT_FLAG_CAP_WORDS; |
Doug Felt | e8e45f2 | 2010-03-29 14:58:40 -0700 | [diff] [blame] | 1488 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1489 | /** |
| 1490 | * Capitalization mode for {@link #getCapsMode}: capitalize the first |
| 1491 | * character of each sentence. This value is explicitly defined to be the same as |
| 1492 | * {@link InputType#TYPE_TEXT_FLAG_CAP_SENTENCES}. |
| 1493 | */ |
| 1494 | public static final int CAP_MODE_SENTENCES |
| 1495 | = InputType.TYPE_TEXT_FLAG_CAP_SENTENCES; |
Doug Felt | e8e45f2 | 2010-03-29 14:58:40 -0700 | [diff] [blame] | 1496 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1497 | /** |
| 1498 | * Determine what caps mode should be in effect at the current offset in |
| 1499 | * the text. Only the mode bits set in <var>reqModes</var> will be |
| 1500 | * checked. Note that the caps mode flags here are explicitly defined |
| 1501 | * to match those in {@link InputType}. |
Doug Felt | e8e45f2 | 2010-03-29 14:58:40 -0700 | [diff] [blame] | 1502 | * |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1503 | * @param cs The text that should be checked for caps modes. |
| 1504 | * @param off Location in the text at which to check. |
| 1505 | * @param reqModes The modes to be checked: may be any combination of |
| 1506 | * {@link #CAP_MODE_CHARACTERS}, {@link #CAP_MODE_WORDS}, and |
| 1507 | * {@link #CAP_MODE_SENTENCES}. |
Mark Wagner | 6091995 | 2010-03-01 09:24:59 -0800 | [diff] [blame] | 1508 | * |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1509 | * @return Returns the actual capitalization modes that can be in effect |
| 1510 | * at the current position, which is any combination of |
| 1511 | * {@link #CAP_MODE_CHARACTERS}, {@link #CAP_MODE_WORDS}, and |
| 1512 | * {@link #CAP_MODE_SENTENCES}. |
| 1513 | */ |
| 1514 | public static int getCapsMode(CharSequence cs, int off, int reqModes) { |
Mark Wagner | 6091995 | 2010-03-01 09:24:59 -0800 | [diff] [blame] | 1515 | if (off < 0) { |
| 1516 | return 0; |
| 1517 | } |
| 1518 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1519 | int i; |
| 1520 | char c; |
| 1521 | int mode = 0; |
| 1522 | |
| 1523 | if ((reqModes&CAP_MODE_CHARACTERS) != 0) { |
| 1524 | mode |= CAP_MODE_CHARACTERS; |
| 1525 | } |
| 1526 | if ((reqModes&(CAP_MODE_WORDS|CAP_MODE_SENTENCES)) == 0) { |
| 1527 | return mode; |
| 1528 | } |
| 1529 | |
| 1530 | // Back over allowed opening punctuation. |
| 1531 | |
| 1532 | for (i = off; i > 0; i--) { |
| 1533 | c = cs.charAt(i - 1); |
| 1534 | |
| 1535 | if (c != '"' && c != '\'' && |
| 1536 | Character.getType(c) != Character.START_PUNCTUATION) { |
| 1537 | break; |
| 1538 | } |
| 1539 | } |
| 1540 | |
| 1541 | // Start of paragraph, with optional whitespace. |
| 1542 | |
| 1543 | int j = i; |
| 1544 | while (j > 0 && ((c = cs.charAt(j - 1)) == ' ' || c == '\t')) { |
| 1545 | j--; |
| 1546 | } |
| 1547 | if (j == 0 || cs.charAt(j - 1) == '\n') { |
| 1548 | return mode | CAP_MODE_WORDS; |
| 1549 | } |
| 1550 | |
| 1551 | // Or start of word if we are that style. |
| 1552 | |
| 1553 | if ((reqModes&CAP_MODE_SENTENCES) == 0) { |
| 1554 | if (i != j) mode |= CAP_MODE_WORDS; |
| 1555 | return mode; |
| 1556 | } |
| 1557 | |
| 1558 | // There must be a space if not the start of paragraph. |
| 1559 | |
| 1560 | if (i == j) { |
| 1561 | return mode; |
| 1562 | } |
| 1563 | |
| 1564 | // Back over allowed closing punctuation. |
| 1565 | |
| 1566 | for (; j > 0; j--) { |
| 1567 | c = cs.charAt(j - 1); |
| 1568 | |
| 1569 | if (c != '"' && c != '\'' && |
| 1570 | Character.getType(c) != Character.END_PUNCTUATION) { |
| 1571 | break; |
| 1572 | } |
| 1573 | } |
| 1574 | |
| 1575 | if (j > 0) { |
| 1576 | c = cs.charAt(j - 1); |
| 1577 | |
| 1578 | if (c == '.' || c == '?' || c == '!') { |
| 1579 | // Do not capitalize if the word ends with a period but |
| 1580 | // also contains a period, in which case it is an abbreviation. |
| 1581 | |
| 1582 | if (c == '.') { |
| 1583 | for (int k = j - 2; k >= 0; k--) { |
| 1584 | c = cs.charAt(k); |
| 1585 | |
| 1586 | if (c == '.') { |
| 1587 | return mode; |
| 1588 | } |
| 1589 | |
| 1590 | if (!Character.isLetter(c)) { |
| 1591 | break; |
| 1592 | } |
| 1593 | } |
| 1594 | } |
| 1595 | |
| 1596 | return mode | CAP_MODE_SENTENCES; |
| 1597 | } |
| 1598 | } |
| 1599 | |
| 1600 | return mode; |
| 1601 | } |
Doug Felt | e8e45f2 | 2010-03-29 14:58:40 -0700 | [diff] [blame] | 1602 | |
Brad Fitzpatrick | 11fe181 | 2010-09-10 16:07:52 -0700 | [diff] [blame] | 1603 | /** |
| 1604 | * Does a comma-delimited list 'delimitedString' contain a certain item? |
| 1605 | * (without allocating memory) |
| 1606 | * |
| 1607 | * @hide |
| 1608 | */ |
| 1609 | public static boolean delimitedStringContains( |
| 1610 | String delimitedString, char delimiter, String item) { |
| 1611 | if (isEmpty(delimitedString) || isEmpty(item)) { |
| 1612 | return false; |
| 1613 | } |
| 1614 | int pos = -1; |
| 1615 | int length = delimitedString.length(); |
| 1616 | while ((pos = delimitedString.indexOf(item, pos + 1)) != -1) { |
| 1617 | if (pos > 0 && delimitedString.charAt(pos - 1) != delimiter) { |
| 1618 | continue; |
| 1619 | } |
| 1620 | int expectedDelimiterPos = pos + item.length(); |
| 1621 | if (expectedDelimiterPos == length) { |
| 1622 | // Match at end of string. |
| 1623 | return true; |
| 1624 | } |
| 1625 | if (delimitedString.charAt(expectedDelimiterPos) == delimiter) { |
| 1626 | return true; |
| 1627 | } |
| 1628 | } |
| 1629 | return false; |
| 1630 | } |
| 1631 | |
Gilles Debunne | 1e3ac18 | 2011-03-08 14:22:34 -0800 | [diff] [blame] | 1632 | /** |
| 1633 | * Removes empty spans from the <code>spans</code> array. |
| 1634 | * |
| 1635 | * When parsing a Spanned using {@link Spanned#nextSpanTransition(int, int, Class)}, empty spans |
| 1636 | * will (correctly) create span transitions, and calling getSpans on a slice of text bounded by |
| 1637 | * one of these transitions will (correctly) include the empty overlapping span. |
| 1638 | * |
| 1639 | * However, these empty spans should not be taken into account when layouting or rendering the |
| 1640 | * string and this method provides a way to filter getSpans' results accordingly. |
| 1641 | * |
| 1642 | * @param spans A list of spans retrieved using {@link Spanned#getSpans(int, int, Class)} from |
| 1643 | * the <code>spanned</code> |
| 1644 | * @param spanned The Spanned from which spans were extracted |
| 1645 | * @return A subset of spans where empty spans ({@link Spanned#getSpanStart(Object)} == |
| 1646 | * {@link Spanned#getSpanEnd(Object)} have been removed. The initial order is preserved |
| 1647 | * @hide |
| 1648 | */ |
| 1649 | @SuppressWarnings("unchecked") |
| 1650 | public static <T> T[] removeEmptySpans(T[] spans, Spanned spanned, Class<T> klass) { |
| 1651 | T[] copy = null; |
| 1652 | int count = 0; |
| 1653 | |
| 1654 | for (int i = 0; i < spans.length; i++) { |
| 1655 | final T span = spans[i]; |
| 1656 | final int start = spanned.getSpanStart(span); |
| 1657 | final int end = spanned.getSpanEnd(span); |
| 1658 | |
| 1659 | if (start == end) { |
| 1660 | if (copy == null) { |
| 1661 | copy = (T[]) Array.newInstance(klass, spans.length - 1); |
| 1662 | System.arraycopy(spans, 0, copy, 0, i); |
| 1663 | count = i; |
| 1664 | } |
| 1665 | } else { |
| 1666 | if (copy != null) { |
| 1667 | copy[count] = span; |
| 1668 | count++; |
| 1669 | } |
| 1670 | } |
| 1671 | } |
| 1672 | |
| 1673 | if (copy != null) { |
| 1674 | T[] result = (T[]) Array.newInstance(klass, count); |
| 1675 | System.arraycopy(copy, 0, result, 0, count); |
| 1676 | return result; |
| 1677 | } else { |
| 1678 | return spans; |
| 1679 | } |
| 1680 | } |
| 1681 | |
Gilles Debunne | 6c488de | 2012-03-01 16:20:35 -0800 | [diff] [blame] | 1682 | /** |
| 1683 | * Pack 2 int values into a long, useful as a return value for a range |
| 1684 | * @see #unpackRangeStartFromLong(long) |
| 1685 | * @see #unpackRangeEndFromLong(long) |
| 1686 | * @hide |
| 1687 | */ |
| 1688 | public static long packRangeInLong(int start, int end) { |
| 1689 | return (((long) start) << 32) | end; |
| 1690 | } |
| 1691 | |
| 1692 | /** |
| 1693 | * Get the start value from a range packed in a long by {@link #packRangeInLong(int, int)} |
| 1694 | * @see #unpackRangeEndFromLong(long) |
| 1695 | * @see #packRangeInLong(int, int) |
| 1696 | * @hide |
| 1697 | */ |
| 1698 | public static int unpackRangeStartFromLong(long range) { |
| 1699 | return (int) (range >>> 32); |
| 1700 | } |
| 1701 | |
| 1702 | /** |
| 1703 | * Get the end value from a range packed in a long by {@link #packRangeInLong(int, int)} |
| 1704 | * @see #unpackRangeStartFromLong(long) |
| 1705 | * @see #packRangeInLong(int, int) |
| 1706 | * @hide |
| 1707 | */ |
| 1708 | public static int unpackRangeEndFromLong(long range) { |
| 1709 | return (int) (range & 0x00000000FFFFFFFFL); |
| 1710 | } |
| 1711 | |
Fabrice Di Meglio | d3d9f3f | 2012-09-18 12:55:32 -0700 | [diff] [blame^] | 1712 | /** |
| 1713 | * Return the layout direction for a given Locale |
| 1714 | * |
| 1715 | * @param locale the Locale for which we want the layout direction. Can be null. |
| 1716 | * @return the layout direction. This may be one of: |
| 1717 | * {@link android.view.View#LAYOUT_DIRECTION_LTR} or |
| 1718 | * {@link android.view.View#LAYOUT_DIRECTION_RTL}. |
| 1719 | * |
| 1720 | * Be careful: this code will need to be updated when vertical scripts will be supported |
| 1721 | */ |
| 1722 | public static int getLayoutDirectionFromLocale(Locale locale) { |
| 1723 | if (locale != null && !locale.equals(Locale.ROOT)) { |
| 1724 | final String scriptSubtag = ICU.getScript(ICU.addLikelySubtags(locale.toString())); |
| 1725 | if (scriptSubtag == null) return getLayoutDirectionFromFirstChar(locale); |
| 1726 | |
| 1727 | if (scriptSubtag.equalsIgnoreCase(ARAB_SCRIPT_SUBTAG) || |
| 1728 | scriptSubtag.equalsIgnoreCase(HEBR_SCRIPT_SUBTAG)) { |
| 1729 | return View.LAYOUT_DIRECTION_RTL; |
| 1730 | } |
| 1731 | } |
| 1732 | |
| 1733 | return View.LAYOUT_DIRECTION_LTR; |
| 1734 | } |
| 1735 | |
| 1736 | /** |
| 1737 | * Fallback algorithm to detect the locale direction. Rely on the fist char of the |
| 1738 | * localized locale name. This will not work if the localized locale name is in English |
| 1739 | * (this is the case for ICU 4.4 and "Urdu" script) |
| 1740 | * |
| 1741 | * @param locale |
| 1742 | * @return the layout direction. This may be one of: |
| 1743 | * {@link View#LAYOUT_DIRECTION_LTR} or |
| 1744 | * {@link View#LAYOUT_DIRECTION_RTL}. |
| 1745 | * |
| 1746 | * Be careful: this code will need to be updated when vertical scripts will be supported |
| 1747 | * |
| 1748 | * @hide |
| 1749 | */ |
| 1750 | private static int getLayoutDirectionFromFirstChar(Locale locale) { |
| 1751 | switch(Character.getDirectionality(locale.getDisplayName(locale).charAt(0))) { |
| 1752 | case Character.DIRECTIONALITY_RIGHT_TO_LEFT: |
| 1753 | case Character.DIRECTIONALITY_RIGHT_TO_LEFT_ARABIC: |
| 1754 | return View.LAYOUT_DIRECTION_RTL; |
| 1755 | |
| 1756 | case Character.DIRECTIONALITY_LEFT_TO_RIGHT: |
| 1757 | default: |
| 1758 | return View.LAYOUT_DIRECTION_LTR; |
| 1759 | } |
| 1760 | } |
| 1761 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1762 | private static Object sLock = new Object(); |
Fabrice Di Meglio | d3d9f3f | 2012-09-18 12:55:32 -0700 | [diff] [blame^] | 1763 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1764 | private static char[] sTemp = null; |
Fabrice Di Meglio | cb33264 | 2011-09-23 19:08:04 -0700 | [diff] [blame] | 1765 | |
| 1766 | private static String[] EMPTY_STRING_ARRAY = new String[]{}; |
| 1767 | |
| 1768 | private static final char ZWNBS_CHAR = '\uFEFF'; |
Fabrice Di Meglio | d3d9f3f | 2012-09-18 12:55:32 -0700 | [diff] [blame^] | 1769 | |
| 1770 | private static String ARAB_SCRIPT_SUBTAG = "Arab"; |
| 1771 | private static String HEBR_SCRIPT_SUBTAG = "Hebr"; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1772 | } |