1/* 2 * Copyright (C) 2009 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 */ 16package com.android.vcard; 17 18import com.android.vcard.exception.VCardException; 19 20import android.content.ContentProviderOperation; 21import android.provider.ContactsContract.Data; 22import android.provider.ContactsContract.CommonDataKinds.Im; 23import android.provider.ContactsContract.CommonDataKinds.Phone; 24import android.provider.ContactsContract.CommonDataKinds.StructuredPostal; 25import android.telephony.PhoneNumberUtils; 26import android.text.SpannableStringBuilder; 27import android.text.TextUtils; 28import android.util.Log; 29 30import java.io.ByteArrayOutputStream; 31import java.io.UnsupportedEncodingException; 32import java.nio.ByteBuffer; 33import java.nio.charset.Charset; 34import java.util.ArrayList; 35import java.util.Arrays; 36import java.util.Collection; 37import java.util.HashMap; 38import java.util.HashSet; 39import java.util.List; 40import java.util.Map; 41import java.util.Set; 42 43/** 44 * Utilities for VCard handling codes. 45 */ 46public class VCardUtils { 47 private static final String LOG_TAG = VCardConstants.LOG_TAG; 48 49 /** 50 * See org.apache.commons.codec.DecoderException 51 */ 52 private static class DecoderException extends Exception { 53 public DecoderException(String pMessage) { 54 super(pMessage); 55 } 56 } 57 58 /** 59 * See org.apache.commons.codec.net.QuotedPrintableCodec 60 */ 61 private static class QuotedPrintableCodecPort { 62 private static byte ESCAPE_CHAR = '='; 63 public static final byte[] decodeQuotedPrintable(byte[] bytes) 64 throws DecoderException { 65 if (bytes == null) { 66 return null; 67 } 68 ByteArrayOutputStream buffer = new ByteArrayOutputStream(); 69 for (int i = 0; i < bytes.length; i++) { 70 int b = bytes[i]; 71 if (b == ESCAPE_CHAR) { 72 try { 73 int u = Character.digit((char) bytes[++i], 16); 74 int l = Character.digit((char) bytes[++i], 16); 75 if (u == -1 || l == -1) { 76 throw new DecoderException("Invalid quoted-printable encoding"); 77 } 78 buffer.write((char) ((u << 4) + l)); 79 } catch (ArrayIndexOutOfBoundsException e) { 80 throw new DecoderException("Invalid quoted-printable encoding"); 81 } 82 } else { 83 buffer.write(b); 84 } 85 } 86 return buffer.toByteArray(); 87 } 88 } 89 90 /** 91 * Ported methods which are hidden in {@link PhoneNumberUtils}. 92 */ 93 public static class PhoneNumberUtilsPort { 94 public static String formatNumber(String source, int defaultFormattingType) { 95 final SpannableStringBuilder text = new SpannableStringBuilder(source); 96 PhoneNumberUtils.formatNumber(text, defaultFormattingType); 97 return text.toString(); 98 } 99 } 100 101 /** 102 * Ported methods which are hidden in {@link TextUtils}. 103 */ 104 public static class TextUtilsPort { 105 public static boolean isPrintableAscii(final char c) { 106 final int asciiFirst = 0x20; 107 final int asciiLast = 0x7E; // included 108 return (asciiFirst <= c && c <= asciiLast) || c == '\r' || c == '\n'; 109 } 110 111 public static boolean isPrintableAsciiOnly(final CharSequence str) { 112 final int len = str.length(); 113 for (int i = 0; i < len; i++) { 114 if (!isPrintableAscii(str.charAt(i))) { 115 return false; 116 } 117 } 118 return true; 119 } 120 } 121 122 // Note that not all types are included in this map/set, since, for example, TYPE_HOME_FAX is 123 // converted to two parameter Strings. These only contain some minor fields valid in both 124 // vCard and current (as of 2009-08-07) Contacts structure. 125 private static final Map<Integer, String> sKnownPhoneTypesMap_ItoS; 126 private static final Set<String> sPhoneTypesUnknownToContactsSet; 127 private static final Map<String, Integer> sKnownPhoneTypeMap_StoI; 128 private static final Map<Integer, String> sKnownImPropNameMap_ItoS; 129 private static final Set<String> sMobilePhoneLabelSet; 130 131 static { 132 sKnownPhoneTypesMap_ItoS = new HashMap<Integer, String>(); 133 sKnownPhoneTypeMap_StoI = new HashMap<String, Integer>(); 134 135 sKnownPhoneTypesMap_ItoS.put(Phone.TYPE_CAR, VCardConstants.PARAM_TYPE_CAR); 136 sKnownPhoneTypeMap_StoI.put(VCardConstants.PARAM_TYPE_CAR, Phone.TYPE_CAR); 137 sKnownPhoneTypesMap_ItoS.put(Phone.TYPE_PAGER, VCardConstants.PARAM_TYPE_PAGER); 138 sKnownPhoneTypeMap_StoI.put(VCardConstants.PARAM_TYPE_PAGER, Phone.TYPE_PAGER); 139 sKnownPhoneTypesMap_ItoS.put(Phone.TYPE_ISDN, VCardConstants.PARAM_TYPE_ISDN); 140 sKnownPhoneTypeMap_StoI.put(VCardConstants.PARAM_TYPE_ISDN, Phone.TYPE_ISDN); 141 142 sKnownPhoneTypeMap_StoI.put(VCardConstants.PARAM_TYPE_HOME, Phone.TYPE_HOME); 143 sKnownPhoneTypeMap_StoI.put(VCardConstants.PARAM_TYPE_WORK, Phone.TYPE_WORK); 144 sKnownPhoneTypeMap_StoI.put(VCardConstants.PARAM_TYPE_CELL, Phone.TYPE_MOBILE); 145 146 sKnownPhoneTypeMap_StoI.put(VCardConstants.PARAM_PHONE_EXTRA_TYPE_OTHER, Phone.TYPE_OTHER); 147 sKnownPhoneTypeMap_StoI.put(VCardConstants.PARAM_PHONE_EXTRA_TYPE_CALLBACK, 148 Phone.TYPE_CALLBACK); 149 sKnownPhoneTypeMap_StoI.put( 150 VCardConstants.PARAM_PHONE_EXTRA_TYPE_COMPANY_MAIN, Phone.TYPE_COMPANY_MAIN); 151 sKnownPhoneTypeMap_StoI.put(VCardConstants.PARAM_PHONE_EXTRA_TYPE_RADIO, Phone.TYPE_RADIO); 152 sKnownPhoneTypeMap_StoI.put(VCardConstants.PARAM_PHONE_EXTRA_TYPE_TTY_TDD, 153 Phone.TYPE_TTY_TDD); 154 sKnownPhoneTypeMap_StoI.put(VCardConstants.PARAM_PHONE_EXTRA_TYPE_ASSISTANT, 155 Phone.TYPE_ASSISTANT); 156 157 sPhoneTypesUnknownToContactsSet = new HashSet<String>(); 158 sPhoneTypesUnknownToContactsSet.add(VCardConstants.PARAM_TYPE_MODEM); 159 sPhoneTypesUnknownToContactsSet.add(VCardConstants.PARAM_TYPE_MSG); 160 sPhoneTypesUnknownToContactsSet.add(VCardConstants.PARAM_TYPE_BBS); 161 sPhoneTypesUnknownToContactsSet.add(VCardConstants.PARAM_TYPE_VIDEO); 162 163 sKnownImPropNameMap_ItoS = new HashMap<Integer, String>(); 164 sKnownImPropNameMap_ItoS.put(Im.PROTOCOL_AIM, VCardConstants.PROPERTY_X_AIM); 165 sKnownImPropNameMap_ItoS.put(Im.PROTOCOL_MSN, VCardConstants.PROPERTY_X_MSN); 166 sKnownImPropNameMap_ItoS.put(Im.PROTOCOL_YAHOO, VCardConstants.PROPERTY_X_YAHOO); 167 sKnownImPropNameMap_ItoS.put(Im.PROTOCOL_SKYPE, VCardConstants.PROPERTY_X_SKYPE_USERNAME); 168 sKnownImPropNameMap_ItoS.put(Im.PROTOCOL_GOOGLE_TALK, 169 VCardConstants.PROPERTY_X_GOOGLE_TALK); 170 sKnownImPropNameMap_ItoS.put(Im.PROTOCOL_ICQ, VCardConstants.PROPERTY_X_ICQ); 171 sKnownImPropNameMap_ItoS.put(Im.PROTOCOL_JABBER, VCardConstants.PROPERTY_X_JABBER); 172 sKnownImPropNameMap_ItoS.put(Im.PROTOCOL_QQ, VCardConstants.PROPERTY_X_QQ); 173 sKnownImPropNameMap_ItoS.put(Im.PROTOCOL_NETMEETING, VCardConstants.PROPERTY_X_NETMEETING); 174 175 // \u643A\u5E2F\u96FB\u8A71 = Full-width Hiragana "Keitai-Denwa" (mobile phone) 176 // \u643A\u5E2F = Full-width Hiragana "Keitai" (mobile phone) 177 // \u30B1\u30A4\u30BF\u30A4 = Full-width Katakana "Keitai" (mobile phone) 178 // \uFF79\uFF72\uFF80\uFF72 = Half-width Katakana "Keitai" (mobile phone) 179 sMobilePhoneLabelSet = new HashSet<String>(Arrays.asList( 180 "MOBILE", "\u643A\u5E2F\u96FB\u8A71", "\u643A\u5E2F", "\u30B1\u30A4\u30BF\u30A4", 181 "\uFF79\uFF72\uFF80\uFF72")); 182 } 183 184 public static String getPhoneTypeString(Integer type) { 185 return sKnownPhoneTypesMap_ItoS.get(type); 186 } 187 188 /** 189 * Returns Interger when the given types can be parsed as known type. Returns String object 190 * when not, which should be set to label. 191 */ 192 public static Object getPhoneTypeFromStrings(Collection<String> types, 193 String number) { 194 if (number == null) { 195 number = ""; 196 } 197 int type = -1; 198 String label = null; 199 boolean isFax = false; 200 boolean hasPref = false; 201 202 if (types != null) { 203 for (final String typeStringOrg : types) { 204 if (typeStringOrg == null) { 205 continue; 206 } 207 final String typeStringUpperCase = typeStringOrg.toUpperCase(); 208 if (typeStringUpperCase.equals(VCardConstants.PARAM_TYPE_PREF)) { 209 hasPref = true; 210 } else if (typeStringUpperCase.equals(VCardConstants.PARAM_TYPE_FAX)) { 211 isFax = true; 212 } else { 213 final String labelCandidate; 214 if (typeStringUpperCase.startsWith("X-") && type < 0) { 215 labelCandidate = typeStringOrg.substring(2); 216 } else { 217 labelCandidate = typeStringOrg; 218 } 219 if (labelCandidate.length() == 0) { 220 continue; 221 } 222 // e.g. "home" -> TYPE_HOME 223 final Integer tmp = sKnownPhoneTypeMap_StoI.get(labelCandidate.toUpperCase()); 224 if (tmp != null) { 225 final int typeCandidate = tmp; 226 // TYPE_PAGER is prefered when the number contains @ surronded by 227 // a pager number and a domain name. 228 // e.g. 229 // o 1111@domain.com 230 // x @domain.com 231 // x 1111@ 232 final int indexOfAt = number.indexOf("@"); 233 if ((typeCandidate == Phone.TYPE_PAGER 234 && 0 < indexOfAt && indexOfAt < number.length() - 1) 235 || type < 0 236 || type == Phone.TYPE_CUSTOM) { 237 type = tmp; 238 } 239 } else if (type < 0) { 240 type = Phone.TYPE_CUSTOM; 241 label = labelCandidate; 242 } 243 } 244 } 245 } 246 if (type < 0) { 247 if (hasPref) { 248 type = Phone.TYPE_MAIN; 249 } else { 250 // default to TYPE_HOME 251 type = Phone.TYPE_HOME; 252 } 253 } 254 if (isFax) { 255 if (type == Phone.TYPE_HOME) { 256 type = Phone.TYPE_FAX_HOME; 257 } else if (type == Phone.TYPE_WORK) { 258 type = Phone.TYPE_FAX_WORK; 259 } else if (type == Phone.TYPE_OTHER) { 260 type = Phone.TYPE_OTHER_FAX; 261 } 262 } 263 if (type == Phone.TYPE_CUSTOM) { 264 return label; 265 } else { 266 return type; 267 } 268 } 269 270 @SuppressWarnings("deprecation") 271 public static boolean isMobilePhoneLabel(final String label) { 272 // For backward compatibility. 273 // Detail: Until Donut, there isn't TYPE_MOBILE for email while there is now. 274 // To support mobile type at that time, this custom label had been used. 275 return ("_AUTO_CELL".equals(label) || sMobilePhoneLabelSet.contains(label)); 276 } 277 278 public static boolean isValidInV21ButUnknownToContactsPhoteType(final String label) { 279 return sPhoneTypesUnknownToContactsSet.contains(label); 280 } 281 282 public static String getPropertyNameForIm(final int protocol) { 283 return sKnownImPropNameMap_ItoS.get(protocol); 284 } 285 286 public static String[] sortNameElements(final int nameOrder, 287 final String familyName, final String middleName, final String givenName) { 288 final String[] list = new String[3]; 289 final int nameOrderType = VCardConfig.getNameOrderType(nameOrder); 290 switch (nameOrderType) { 291 case VCardConfig.NAME_ORDER_JAPANESE: { 292 if (containsOnlyPrintableAscii(familyName) && 293 containsOnlyPrintableAscii(givenName)) { 294 list[0] = givenName; 295 list[1] = middleName; 296 list[2] = familyName; 297 } else { 298 list[0] = familyName; 299 list[1] = middleName; 300 list[2] = givenName; 301 } 302 break; 303 } 304 case VCardConfig.NAME_ORDER_EUROPE: { 305 list[0] = middleName; 306 list[1] = givenName; 307 list[2] = familyName; 308 break; 309 } 310 default: { 311 list[0] = givenName; 312 list[1] = middleName; 313 list[2] = familyName; 314 break; 315 } 316 } 317 return list; 318 } 319 320 public static int getPhoneNumberFormat(final int vcardType) { 321 if (VCardConfig.isJapaneseDevice(vcardType)) { 322 return PhoneNumberUtils.FORMAT_JAPAN; 323 } else { 324 return PhoneNumberUtils.FORMAT_NANP; 325 } 326 } 327 328 public static String constructNameFromElements(final int nameOrder, 329 final String familyName, final String middleName, final String givenName) { 330 return constructNameFromElements(nameOrder, familyName, middleName, givenName, 331 null, null); 332 } 333 334 public static String constructNameFromElements(final int nameOrder, 335 final String familyName, final String middleName, final String givenName, 336 final String prefix, final String suffix) { 337 final StringBuilder builder = new StringBuilder(); 338 final String[] nameList = sortNameElements(nameOrder, familyName, middleName, givenName); 339 boolean first = true; 340 if (!TextUtils.isEmpty(prefix)) { 341 first = false; 342 builder.append(prefix); 343 } 344 for (final String namePart : nameList) { 345 if (!TextUtils.isEmpty(namePart)) { 346 if (first) { 347 first = false; 348 } else { 349 builder.append(' '); 350 } 351 builder.append(namePart); 352 } 353 } 354 if (!TextUtils.isEmpty(suffix)) { 355 if (!first) { 356 builder.append(' '); 357 } 358 builder.append(suffix); 359 } 360 return builder.toString(); 361 } 362 363 /** 364 * Splits the given value into pieces using the delimiter ';' inside it. 365 * 366 * Escaped characters in those values are automatically unescaped into original form. 367 */ 368 public static List<String> constructListFromValue(final String value, 369 final int vcardType) { 370 final List<String> list = new ArrayList<String>(); 371 StringBuilder builder = new StringBuilder(); 372 final int length = value.length(); 373 for (int i = 0; i < length; i++) { 374 char ch = value.charAt(i); 375 if (ch == '\\' && i < length - 1) { 376 char nextCh = value.charAt(i + 1); 377 final String unescapedString; 378 if (VCardConfig.isVersion40(vcardType)) { 379 unescapedString = VCardParserImpl_V40.unescapeCharacter(nextCh); 380 } else if (VCardConfig.isVersion30(vcardType)) { 381 unescapedString = VCardParserImpl_V30.unescapeCharacter(nextCh); 382 } else { 383 if (!VCardConfig.isVersion21(vcardType)) { 384 // Unknown vCard type 385 Log.w(LOG_TAG, "Unknown vCard type"); 386 } 387 unescapedString = VCardParserImpl_V21.unescapeCharacter(nextCh); 388 } 389 390 if (unescapedString != null) { 391 builder.append(unescapedString); 392 i++; 393 } else { 394 builder.append(ch); 395 } 396 } else if (ch == ';') { 397 list.add(builder.toString()); 398 builder = new StringBuilder(); 399 } else { 400 builder.append(ch); 401 } 402 } 403 list.add(builder.toString()); 404 return list; 405 } 406 407 public static boolean containsOnlyPrintableAscii(final String...values) { 408 if (values == null) { 409 return true; 410 } 411 return containsOnlyPrintableAscii(Arrays.asList(values)); 412 } 413 414 public static boolean containsOnlyPrintableAscii(final Collection<String> values) { 415 if (values == null) { 416 return true; 417 } 418 for (final String value : values) { 419 if (TextUtils.isEmpty(value)) { 420 continue; 421 } 422 if (!TextUtilsPort.isPrintableAsciiOnly(value)) { 423 return false; 424 } 425 } 426 return true; 427 } 428 429 /** 430 * <p> 431 * This is useful when checking the string should be encoded into quoted-printable 432 * or not, which is required by vCard 2.1. 433 * </p> 434 * <p> 435 * See the definition of "7bit" in vCard 2.1 spec for more information. 436 * </p> 437 */ 438 public static boolean containsOnlyNonCrLfPrintableAscii(final String...values) { 439 if (values == null) { 440 return true; 441 } 442 return containsOnlyNonCrLfPrintableAscii(Arrays.asList(values)); 443 } 444 445 public static boolean containsOnlyNonCrLfPrintableAscii(final Collection<String> values) { 446 if (values == null) { 447 return true; 448 } 449 final int asciiFirst = 0x20; 450 final int asciiLast = 0x7E; // included 451 for (final String value : values) { 452 if (TextUtils.isEmpty(value)) { 453 continue; 454 } 455 final int length = value.length(); 456 for (int i = 0; i < length; i = value.offsetByCodePoints(i, 1)) { 457 final int c = value.codePointAt(i); 458 if (!(asciiFirst <= c && c <= asciiLast)) { 459 return false; 460 } 461 } 462 } 463 return true; 464 } 465 466 private static final Set<Character> sUnAcceptableAsciiInV21WordSet = 467 new HashSet<Character>(Arrays.asList('[', ']', '=', ':', '.', ',', ' ')); 468 469 /** 470 * <p> 471 * This is useful since vCard 3.0 often requires the ("X-") properties and groups 472 * should contain only alphabets, digits, and hyphen. 473 * </p> 474 * <p> 475 * Note: It is already known some devices (wrongly) outputs properties with characters 476 * which should not be in the field. One example is "X-GOOGLE TALK". We accept 477 * such kind of input but must never output it unless the target is very specific 478 * to the device which is able to parse the malformed input. 479 * </p> 480 */ 481 public static boolean containsOnlyAlphaDigitHyphen(final String...values) { 482 if (values == null) { 483 return true; 484 } 485 return containsOnlyAlphaDigitHyphen(Arrays.asList(values)); 486 } 487 488 public static boolean containsOnlyAlphaDigitHyphen(final Collection<String> values) { 489 if (values == null) { 490 return true; 491 } 492 final int upperAlphabetFirst = 0x41; // A 493 final int upperAlphabetAfterLast = 0x5b; // [ 494 final int lowerAlphabetFirst = 0x61; // a 495 final int lowerAlphabetAfterLast = 0x7b; // { 496 final int digitFirst = 0x30; // 0 497 final int digitAfterLast = 0x3A; // : 498 final int hyphen = '-'; 499 for (final String str : values) { 500 if (TextUtils.isEmpty(str)) { 501 continue; 502 } 503 final int length = str.length(); 504 for (int i = 0; i < length; i = str.offsetByCodePoints(i, 1)) { 505 int codepoint = str.codePointAt(i); 506 if (!((lowerAlphabetFirst <= codepoint && codepoint < lowerAlphabetAfterLast) || 507 (upperAlphabetFirst <= codepoint && codepoint < upperAlphabetAfterLast) || 508 (digitFirst <= codepoint && codepoint < digitAfterLast) || 509 (codepoint == hyphen))) { 510 return false; 511 } 512 } 513 } 514 return true; 515 } 516 517 public static boolean containsOnlyWhiteSpaces(final String...values) { 518 if (values == null) { 519 return true; 520 } 521 return containsOnlyWhiteSpaces(Arrays.asList(values)); 522 } 523 524 public static boolean containsOnlyWhiteSpaces(final Collection<String> values) { 525 if (values == null) { 526 return true; 527 } 528 for (final String str : values) { 529 if (TextUtils.isEmpty(str)) { 530 continue; 531 } 532 final int length = str.length(); 533 for (int i = 0; i < length; i = str.offsetByCodePoints(i, 1)) { 534 if (!Character.isWhitespace(str.codePointAt(i))) { 535 return false; 536 } 537 } 538 } 539 return true; 540 } 541 542 /** 543 * <p> 544 * Returns true when the given String is categorized as "word" specified in vCard spec 2.1. 545 * </p> 546 * <p> 547 * vCard 2.1 specifies:<br /> 548 * word = <any printable 7bit us-ascii except []=:., > 549 * </p> 550 */ 551 public static boolean isV21Word(final String value) { 552 if (TextUtils.isEmpty(value)) { 553 return true; 554 } 555 final int asciiFirst = 0x20; 556 final int asciiLast = 0x7E; // included 557 final int length = value.length(); 558 for (int i = 0; i < length; i = value.offsetByCodePoints(i, 1)) { 559 final int c = value.codePointAt(i); 560 if (!(asciiFirst <= c && c <= asciiLast) || 561 sUnAcceptableAsciiInV21WordSet.contains((char)c)) { 562 return false; 563 } 564 } 565 return true; 566 } 567 568 private static final int[] sEscapeIndicatorsV30 = new int[]{ 569 ':', ';', ',', ' ' 570 }; 571 572 private static final int[] sEscapeIndicatorsV40 = new int[]{ 573 ';', ':' 574 }; 575 576 /** 577 * <P> 578 * Returns String available as parameter value in vCard 3.0. 579 * </P> 580 * <P> 581 * RFC 2426 requires vCard composer to quote parameter values when it contains 582 * semi-colon, for example (See RFC 2426 for more information). 583 * This method checks whether the given String can be used without quotes. 584 * </P> 585 * <P> 586 * Note: We remove DQUOTE inside the given value silently for now. 587 * </P> 588 */ 589 public static String toStringAsV30ParamValue(String value) { 590 return toStringAsParamValue(value, sEscapeIndicatorsV30); 591 } 592 593 public static String toStringAsV40ParamValue(String value) { 594 return toStringAsParamValue(value, sEscapeIndicatorsV40); 595 } 596 597 private static String toStringAsParamValue(String value, final int[] escapeIndicators) { 598 if (TextUtils.isEmpty(value)) { 599 value = ""; 600 } 601 final int asciiFirst = 0x20; 602 final int asciiLast = 0x7E; // included 603 final StringBuilder builder = new StringBuilder(); 604 final int length = value.length(); 605 boolean needQuote = false; 606 for (int i = 0; i < length; i = value.offsetByCodePoints(i, 1)) { 607 final int codePoint = value.codePointAt(i); 608 if (codePoint < asciiFirst || codePoint == '"') { 609 // CTL characters and DQUOTE are never accepted. Remove them. 610 continue; 611 } 612 builder.appendCodePoint(codePoint); 613 for (int indicator : escapeIndicators) { 614 if (codePoint == indicator) { 615 needQuote = true; 616 break; 617 } 618 } 619 } 620 621 final String result = builder.toString(); 622 return ((result.isEmpty() || VCardUtils.containsOnlyWhiteSpaces(result)) 623 ? "" 624 : (needQuote ? ('"' + result + '"') 625 : result)); 626 } 627 628 public static String toHalfWidthString(final String orgString) { 629 if (TextUtils.isEmpty(orgString)) { 630 return null; 631 } 632 final StringBuilder builder = new StringBuilder(); 633 final int length = orgString.length(); 634 for (int i = 0; i < length; i = orgString.offsetByCodePoints(i, 1)) { 635 // All Japanese character is able to be expressed by char. 636 // Do not need to use String#codepPointAt(). 637 final char ch = orgString.charAt(i); 638 final String halfWidthText = JapaneseUtils.tryGetHalfWidthText(ch); 639 if (halfWidthText != null) { 640 builder.append(halfWidthText); 641 } else { 642 builder.append(ch); 643 } 644 } 645 return builder.toString(); 646 } 647 648 /** 649 * Guesses the format of input image. Currently just the first few bytes are used. 650 * The type "GIF", "PNG", or "JPEG" is returned when possible. Returns null when 651 * the guess failed. 652 * @param input Image as byte array. 653 * @return The image type or null when the type cannot be determined. 654 */ 655 public static String guessImageType(final byte[] input) { 656 if (input == null) { 657 return null; 658 } 659 if (input.length >= 3 && input[0] == 'G' && input[1] == 'I' && input[2] == 'F') { 660 return "GIF"; 661 } else if (input.length >= 4 && input[0] == (byte) 0x89 662 && input[1] == 'P' && input[2] == 'N' && input[3] == 'G') { 663 // Note: vCard 2.1 officially does not support PNG, but we may have it and 664 // using X- word like "X-PNG" may not let importers know it is PNG. 665 // So we use the String "PNG" as is... 666 return "PNG"; 667 } else if (input.length >= 2 && input[0] == (byte) 0xff 668 && input[1] == (byte) 0xd8) { 669 return "JPEG"; 670 } else { 671 return null; 672 } 673 } 674 675 /** 676 * @return True when all the given values are null or empty Strings. 677 */ 678 public static boolean areAllEmpty(final String...values) { 679 if (values == null) { 680 return true; 681 } 682 683 for (final String value : values) { 684 if (!TextUtils.isEmpty(value)) { 685 return false; 686 } 687 } 688 return true; 689 } 690 691 //// The methods bellow may be used by unit test. 692 693 /** 694 * Unquotes given Quoted-Printable value. value must not be null. 695 */ 696 public static String parseQuotedPrintable( 697 final String value, boolean strictLineBreaking, 698 String sourceCharset, String targetCharset) { 699 // "= " -> " ", "=\t" -> "\t". 700 // Previous code had done this replacement. Keep on the safe side. 701 final String quotedPrintable; 702 { 703 final StringBuilder builder = new StringBuilder(); 704 final int length = value.length(); 705 for (int i = 0; i < length; i++) { 706 char ch = value.charAt(i); 707 if (ch == '=' && i < length - 1) { 708 char nextCh = value.charAt(i + 1); 709 if (nextCh == ' ' || nextCh == '\t') { 710 builder.append(nextCh); 711 i++; 712 continue; 713 } 714 } 715 builder.append(ch); 716 } 717 quotedPrintable = builder.toString(); 718 } 719 720 String[] lines; 721 if (strictLineBreaking) { 722 lines = quotedPrintable.split("\r\n"); 723 } else { 724 StringBuilder builder = new StringBuilder(); 725 final int length = quotedPrintable.length(); 726 ArrayList<String> list = new ArrayList<String>(); 727 for (int i = 0; i < length; i++) { 728 char ch = quotedPrintable.charAt(i); 729 if (ch == '\n') { 730 list.add(builder.toString()); 731 builder = new StringBuilder(); 732 } else if (ch == '\r') { 733 list.add(builder.toString()); 734 builder = new StringBuilder(); 735 if (i < length - 1) { 736 char nextCh = quotedPrintable.charAt(i + 1); 737 if (nextCh == '\n') { 738 i++; 739 } 740 } 741 } else { 742 builder.append(ch); 743 } 744 } 745 final String lastLine = builder.toString(); 746 if (lastLine.length() > 0) { 747 list.add(lastLine); 748 } 749 lines = list.toArray(new String[0]); 750 } 751 752 final StringBuilder builder = new StringBuilder(); 753 for (String line : lines) { 754 if (line.endsWith("=")) { 755 line = line.substring(0, line.length() - 1); 756 } 757 builder.append(line); 758 } 759 760 final String rawString = builder.toString(); 761 if (TextUtils.isEmpty(rawString)) { 762 Log.w(LOG_TAG, "Given raw string is empty."); 763 } 764 765 byte[] rawBytes = null; 766 try { 767 rawBytes = rawString.getBytes(sourceCharset); 768 } catch (UnsupportedEncodingException e) { 769 Log.w(LOG_TAG, "Failed to decode: " + sourceCharset); 770 rawBytes = rawString.getBytes(); 771 } 772 773 byte[] decodedBytes = null; 774 try { 775 decodedBytes = QuotedPrintableCodecPort.decodeQuotedPrintable(rawBytes); 776 } catch (DecoderException e) { 777 Log.e(LOG_TAG, "DecoderException is thrown."); 778 decodedBytes = rawBytes; 779 } 780 781 try { 782 return new String(decodedBytes, targetCharset); 783 } catch (UnsupportedEncodingException e) { 784 Log.e(LOG_TAG, "Failed to encode: charset=" + targetCharset); 785 return new String(decodedBytes); 786 } 787 } 788 789 public static final VCardParser getAppropriateParser(int vcardType) 790 throws VCardException { 791 if (VCardConfig.isVersion21(vcardType)) { 792 return new VCardParser_V21(); 793 } else if (VCardConfig.isVersion30(vcardType)) { 794 return new VCardParser_V30(); 795 } else if (VCardConfig.isVersion40(vcardType)) { 796 return new VCardParser_V40(); 797 } else { 798 throw new VCardException("Version is not specified"); 799 } 800 } 801 802 public static final String convertStringCharset( 803 String originalString, String sourceCharset, String targetCharset) { 804 if (sourceCharset.equalsIgnoreCase(targetCharset)) { 805 return originalString; 806 } 807 final Charset charset = Charset.forName(sourceCharset); 808 final ByteBuffer byteBuffer = charset.encode(originalString); 809 // byteBuffer.array() "may" return byte array which is larger than 810 // byteBuffer.remaining(). Here, we keep on the safe side. 811 final byte[] bytes = new byte[byteBuffer.remaining()]; 812 byteBuffer.get(bytes); 813 try { 814 return new String(bytes, targetCharset); 815 } catch (UnsupportedEncodingException e) { 816 Log.e(LOG_TAG, "Failed to encode: charset=" + targetCharset); 817 return null; 818 } 819 } 820 821 // TODO: utilities for vCard 4.0: datetime, timestamp, integer, float, and boolean 822 823 private VCardUtils() { 824 } 825} 826