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replicant-frameworks_native/vcard/java/com/android/vcard/VCardConfig.java
Daisuke Miyakawa c146f15260 Small fix around intermideate charset (ISO-8859-1). 
After a few investigation, it is found that ISO-8859-1 is confirmed to be the
best charset for that use.

Modify comment so that we explicitly mention it.

Change-Id: I16e487fab33964a1665a1dd6991f2e8598f8895e
2010-05-21 17:11:09 -07:00

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/*
* Copyright (C) 2009 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.vcard;
import android.telephony.PhoneNumberUtils;
import android.util.Log;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
/**
* The class representing VCard related configurations. Useful static methods are not in this class
* but in VCardUtils.
*/
public class VCardConfig {
private static final String LOG_TAG = "VCardConfig";
/* package */ static final int LOG_LEVEL_NONE = 0;
/* package */ static final int LOG_LEVEL_PERFORMANCE_MEASUREMENT = 0x1;
/* package */ static final int LOG_LEVEL_SHOW_WARNING = 0x2;
/* package */ static final int LOG_LEVEL_VERBOSE =
LOG_LEVEL_PERFORMANCE_MEASUREMENT | LOG_LEVEL_SHOW_WARNING;
/* package */ static final int LOG_LEVEL = LOG_LEVEL_NONE;
/**
* <p>
* The charset used during import.
* </p>
* <p>
* We cannot determine which charset should be used to interpret lines in vCard,
* while Java requires us to specify it when InputStream is used.
* We need to rely on the mechanism due to some performance reason.
* </p>
* <p>
* In order to avoid "misinterpretation" of charset and lose any data in vCard,
* "ISO-8859-1" is first used for reading the stream.
* When a charset is specified in a property (with "CHARSET=..." parameter),
* the string is decoded to raw bytes and encoded into the specific charset,
* </p>
* <p>
* Unicode specification there's a one to one mapping between each byte in ISO-8859-1
* and a codepoint, and Java specification requires runtime must have the charset.
* Thus, ISO-8859-1 is one effective mapping for intermediate mapping.
* </p>
*/
public static final String DEFAULT_INTERMEDIATE_CHARSET = "ISO-8859-1";
/**
* The charset used when there's no information affbout what charset should be used to
* encode the binary given from vCard.
*/
public static final String DEFAULT_IMPORT_CHARSET = "UTF-8";
public static final String DEFAULT_EXPORT_CHARSET = "UTF-8";
public static final int FLAG_V21 = 0;
public static final int FLAG_V30 = 1;
// 0x2 is reserved for the future use ...
public static final int NAME_ORDER_DEFAULT = 0;
public static final int NAME_ORDER_EUROPE = 0x4;
public static final int NAME_ORDER_JAPANESE = 0x8;
private static final int NAME_ORDER_MASK = 0xC;
// 0x10 is reserved for safety
/**
* <p>
* The flag indicating the vCard composer will add some "X-" properties used only in Android
* when the formal vCard specification does not have appropriate fields for that data.
* </p>
* <p>
* For example, Android accepts nickname information while vCard 2.1 does not.
* When this flag is on, vCard composer emits alternative "X-" property (like "X-NICKNAME")
* instead of just dropping it.
* </p>
* <p>
* vCard parser code automatically parses the field emitted even when this flag is off.
* </p>
*/
private static final int FLAG_USE_ANDROID_PROPERTY = 0x80000000;
/**
* <p>
* The flag indicating the vCard composer will add some "X-" properties seen in the
* vCard data emitted by the other softwares/devices when the formal vCard specification
* does not have appropriate field(s) for that data.
* </p>
* <p>
* One example is X-PHONETIC-FIRST-NAME/X-PHONETIC-MIDDLE-NAME/X-PHONETIC-LAST-NAME, which are
* for phonetic name (how the name is pronounced), seen in the vCard emitted by some other
* non-Android devices/softwares. We chose to enable the vCard composer to use those
* defact properties since they are also useful for Android devices.
* </p>
* <p>
* Note for developers: only "X-" properties should be added with this flag. vCard 2.1/3.0
* allows any kind of "X-" properties but does not allow non-"X-" properties (except IANA tokens
* in vCard 3.0). Some external parsers may get confused with non-valid, non-"X-" properties.
* </p>
*/
private static final int FLAG_USE_DEFACT_PROPERTY = 0x40000000;
/**
* <p>
* The flag indicating some specific dialect seen in vCard of DoCoMo (one of Japanese
* mobile careers) should be used. This flag does not include any other information like
* that "the vCard is for Japanese". So it is "possible" that "the vCard should have DoCoMo's
* dialect but the name order should be European", but it is not recommended.
* </p>
*/
private static final int FLAG_DOCOMO = 0x20000000;
/**
* <p>
* The flag indicating the vCard composer does "NOT" use Quoted-Printable toward "primary"
* properties even though it is required by vCard 2.1 (QP is prohibited in vCard 3.0).
* </p>
* <p>
* We actually cannot define what is the "primary" property. Note that this is NOT defined
* in vCard specification either. Also be aware that it is NOT related to "primary" notion
* used in {@link android.provider.ContactsContract}.
* This notion is just for vCard composition in Android.
* </p>
* <p>
* We added this Android-specific notion since some (incomplete) vCard exporters for vCard 2.1
* do NOT use Quoted-Printable encoding toward some properties related names like "N", "FN", etc.
* even when their values contain non-ascii or/and CR/LF, while they use the encoding in the
* other properties like "ADR", "ORG", etc.
* <p>
* We are afraid of the case where some vCard importer also forget handling QP presuming QP is
* not used in such fields.
* </p>
* <p>
* This flag is useful when some target importer you are going to focus on does not accept
* such properties with Quoted-Printable encoding.
* </p>
* <p>
* Again, we should not use this flag at all for complying vCard 2.1 spec.
* </p>
* <p>
* In vCard 3.0, Quoted-Printable is explicitly "prohibitted", so we don't need to care this
* kind of problem (hopefully).
* </p>
* @hide
*/
public static final int FLAG_REFRAIN_QP_TO_NAME_PROPERTIES = 0x10000000;
/**
* <p>
* The flag indicating that phonetic name related fields must be converted to
* appropriate form. Note that "appropriate" is not defined in any vCard specification.
* This is Android-specific.
* </p>
* <p>
* One typical (and currently sole) example where we need this flag is the time when
* we need to emit Japanese phonetic names into vCard entries. The property values
* should be encoded into half-width katakana when the target importer is Japanese mobile
* phones', which are probably not able to parse full-width hiragana/katakana for
* historical reasons, while the vCard importers embedded to softwares for PC should be
* able to parse them as we expect.
* </p>
*/
public static final int FLAG_CONVERT_PHONETIC_NAME_STRINGS = 0x08000000;
/**
* <p>
* The flag indicating the vCard composer "for 2.1" emits "TYPE=" string toward TYPE params
* every time possible. The default behavior does not emit it and is valid in the spec.
* In vCrad 3.0, this flag is unnecessary, since "TYPE=" is MUST in vCard 3.0 specification.
* </p>
* <p>
* Detail:
* How more than one TYPE fields are expressed is different between vCard 2.1 and vCard 3.0.
* </p>
* <p>
* e.g.
* </p>
* <ol>
* <li>Probably valid in both vCard 2.1 and vCard 3.0: "ADR;TYPE=DOM;TYPE=HOME:..."</li>
* <li>Valid in vCard 2.1 but not in vCard 3.0: "ADR;DOM;HOME:..."</li>
* <li>Valid in vCard 3.0 but not in vCard 2.1: "ADR;TYPE=DOM,HOME:..."</li>
* </ol>
* <p>
* If you are targeting to the importer which cannot accept TYPE params without "TYPE="
* strings (which should be rare though), please use this flag.
* </p>
* <p>
* Example usage:
* <pre class="prettyprint">int type = (VCARD_TYPE_V21_GENERIC | FLAG_APPEND_TYPE_PARAM);</pre>
* </p>
*/
public static final int FLAG_APPEND_TYPE_PARAM = 0x04000000;
/**
* <p>
* The flag indicating the vCard composer does touch nothing toward phone number Strings
* but leave it as is.
* </p>
* <p>
* The vCard specifications mention nothing toward phone numbers, while some devices
* do (wrongly, but with innevitable reasons).
* For example, there's a possibility Japanese mobile phones are expected to have
* just numbers, hypens, plus, etc. but not usual alphabets, while US mobile phones
* should get such characters. To make exported vCard simple for external parsers,
* we have used {@link PhoneNumberUtils#formatNumber(String)} during export, and
* removed unnecessary characters inside the number (e.g. "111-222-3333 (Miami)"
* becomes "111-222-3333").
* Unfortunate side effect of that use was some control characters used in the other
* areas may be badly affected by the formatting.
* </p>
* <p>
* This flag disables that formatting, affecting both importer and exporter.
* If the user is aware of some side effects due to the implicit formatting, use this flag.
* </p>
*/
public static final int FLAG_REFRAIN_PHONE_NUMBER_FORMATTING = 0x02000000;
/**
* <p>
* For importer only. Ignored in exporter.
* </p>
* <p>
* The flag indicating the parser should handle a nested vCard, in which vCard clause starts
* in another vCard clause. Here's a typical example.
* </p>
* <pre class="prettyprint">BEGIN:VCARD
* BEGIN:VCARD
* VERSION:2.1
* ...
* END:VCARD
* END:VCARD</pre>
* <p>
* The vCard 2.1 specification allows the nest, but also let parsers ignore nested entries,
* while some mobile devices emit nested ones as primary data to be imported.
* </p>
* <p>
* This flag forces a vCard parser to torelate such a nest and understand its content.
* </p>
*/
public static final int FLAG_TORELATE_NEST = 0x01000000;
//// The followings are VCard types available from importer/exporter. ////
/**
* <p>
* The type indicating nothing. Used by {@link VCardSourceDetector} when it
* was not able to guess the exact vCard type.
* </p>
*/
public static final int VCARD_TYPE_UNKNOWN = 0;
/**
* <p>
* Generic vCard format with the vCard 2.1. When composing a vCard entry,
* the US convension will be used toward formatting some values.
* </p>
* <p>
* e.g. The order of the display name would be "Prefix Given Middle Family Suffix",
* while it should be "Prefix Family Middle Given Suffix" in Japan for example.
* </p>
* <p>
* Uses UTF-8 for the charset as a charset for exporting. Note that old vCard importer
* outside Android cannot accept it since vCard 2.1 specifically does not allow
* that charset, while we need to use it to support various languages around the world.
* </p>
* <p>
* If you want to use alternative charset, you should notify the charset to the other
* compontent to be used.
* </p>
*/
public static final int VCARD_TYPE_V21_GENERIC =
(FLAG_V21 | NAME_ORDER_DEFAULT | FLAG_USE_DEFACT_PROPERTY | FLAG_USE_ANDROID_PROPERTY);
/* package */ static String VCARD_TYPE_V21_GENERIC_STR = "v21_generic";
/**
* <p>
* General vCard format with the version 3.0. Uses UTF-8 for the charset.
* </p>
* <p>
* Not fully ready yet. Use with caution when you use this.
* </p>
*/
public static final int VCARD_TYPE_V30_GENERIC =
(FLAG_V30 | NAME_ORDER_DEFAULT | FLAG_USE_DEFACT_PROPERTY | FLAG_USE_ANDROID_PROPERTY);
/* package */ static final String VCARD_TYPE_V30_GENERIC_STR = "v30_generic";
/**
* <p>
* General vCard format for the vCard 2.1 with some Europe convension. Uses Utf-8.
* Currently, only name order is considered ("Prefix Middle Given Family Suffix")
* </p>
*/
public static final int VCARD_TYPE_V21_EUROPE =
(FLAG_V21 | NAME_ORDER_EUROPE | FLAG_USE_DEFACT_PROPERTY | FLAG_USE_ANDROID_PROPERTY);
/* package */ static final String VCARD_TYPE_V21_EUROPE_STR = "v21_europe";
/**
* <p>
* General vCard format with the version 3.0 with some Europe convension. Uses UTF-8.
* </p>
* <p>
* Not ready yet. Use with caution when you use this.
* </p>
*/
public static final int VCARD_TYPE_V30_EUROPE =
(FLAG_V30 | NAME_ORDER_EUROPE | FLAG_USE_DEFACT_PROPERTY | FLAG_USE_ANDROID_PROPERTY);
/* package */ static final String VCARD_TYPE_V30_EUROPE_STR = "v30_europe";
/**
* <p>
* The vCard 2.1 format for miscellaneous Japanese devices, using UTF-8 as default charset.
* </p>
* <p>
* Not ready yet. Use with caution when you use this.
* </p>
*/
public static final int VCARD_TYPE_V21_JAPANESE =
(FLAG_V21 | NAME_ORDER_JAPANESE | FLAG_USE_DEFACT_PROPERTY | FLAG_USE_ANDROID_PROPERTY);
/* package */ static final String VCARD_TYPE_V21_JAPANESE_STR = "v21_japanese_utf8";
/**
* <p>
* The vCard 3.0 format for miscellaneous Japanese devices, using UTF-8 as default charset.
* </p>
* <p>
* Not ready yet. Use with caution when you use this.
* </p>
*/
public static final int VCARD_TYPE_V30_JAPANESE =
(FLAG_V30 | NAME_ORDER_JAPANESE | FLAG_USE_DEFACT_PROPERTY | FLAG_USE_ANDROID_PROPERTY);
/* package */ static final String VCARD_TYPE_V30_JAPANESE_STR = "v30_japanese_utf8";
/**
* <p>
* The vCard 2.1 based format which (partially) considers the convention in Japanese
* mobile phones, where phonetic names are translated to half-width katakana if
* possible, etc. It would be better to use Shift_JIS as a charset for maximum
* compatibility.
* </p>
* @hide Should not be available world wide.
*/
public static final int VCARD_TYPE_V21_JAPANESE_MOBILE =
(FLAG_V21 | NAME_ORDER_JAPANESE |
FLAG_CONVERT_PHONETIC_NAME_STRINGS | FLAG_REFRAIN_QP_TO_NAME_PROPERTIES);
/* package */ static final String VCARD_TYPE_V21_JAPANESE_MOBILE_STR = "v21_japanese_mobile";
/**
* <p>
* The vCard format used in DoCoMo, which is one of Japanese mobile phone careers.
* </p>
* <p>
* Base version is vCard 2.1, but the data has several DoCoMo-specific convensions.
* No Android-specific property nor defact property is included. The "Primary" properties
* are NOT encoded to Quoted-Printable.
* </p>
* @hide Should not be available world wide.
*/
public static final int VCARD_TYPE_DOCOMO =
(VCARD_TYPE_V21_JAPANESE_MOBILE | FLAG_DOCOMO);
/* package */ static final String VCARD_TYPE_DOCOMO_STR = "docomo";
public static int VCARD_TYPE_DEFAULT = VCARD_TYPE_V21_GENERIC;
private static final Map<String, Integer> sVCardTypeMap;
private static final Set<Integer> sJapaneseMobileTypeSet;
static {
sVCardTypeMap = new HashMap<String, Integer>();
sVCardTypeMap.put(VCARD_TYPE_V21_GENERIC_STR, VCARD_TYPE_V21_GENERIC);
sVCardTypeMap.put(VCARD_TYPE_V30_GENERIC_STR, VCARD_TYPE_V30_GENERIC);
sVCardTypeMap.put(VCARD_TYPE_V21_EUROPE_STR, VCARD_TYPE_V21_EUROPE);
sVCardTypeMap.put(VCARD_TYPE_V30_EUROPE_STR, VCARD_TYPE_V30_EUROPE);
sVCardTypeMap.put(VCARD_TYPE_V21_JAPANESE_STR, VCARD_TYPE_V21_JAPANESE);
sVCardTypeMap.put(VCARD_TYPE_V30_JAPANESE_STR, VCARD_TYPE_V30_JAPANESE);
sVCardTypeMap.put(VCARD_TYPE_V21_JAPANESE_MOBILE_STR, VCARD_TYPE_V21_JAPANESE_MOBILE);
sVCardTypeMap.put(VCARD_TYPE_DOCOMO_STR, VCARD_TYPE_DOCOMO);
sJapaneseMobileTypeSet = new HashSet<Integer>();
sJapaneseMobileTypeSet.add(VCARD_TYPE_V21_JAPANESE);
sJapaneseMobileTypeSet.add(VCARD_TYPE_V30_JAPANESE);
sJapaneseMobileTypeSet.add(VCARD_TYPE_V21_JAPANESE_MOBILE);
sJapaneseMobileTypeSet.add(VCARD_TYPE_DOCOMO);
}
public static int getVCardTypeFromString(final String vcardTypeString) {
final String loweredKey = vcardTypeString.toLowerCase();
if (sVCardTypeMap.containsKey(loweredKey)) {
return sVCardTypeMap.get(loweredKey);
} else if ("default".equalsIgnoreCase(vcardTypeString)) {
return VCARD_TYPE_DEFAULT;
} else {
Log.e(LOG_TAG, "Unknown vCard type String: \"" + vcardTypeString + "\"");
return VCARD_TYPE_DEFAULT;
}
}
public static boolean isV30(final int vcardType) {
return ((vcardType & FLAG_V30) != 0);
}
public static boolean shouldUseQuotedPrintable(final int vcardType) {
return !isV30(vcardType);
}
public static int getNameOrderType(final int vcardType) {
return vcardType & NAME_ORDER_MASK;
}
public static boolean usesAndroidSpecificProperty(final int vcardType) {
return ((vcardType & FLAG_USE_ANDROID_PROPERTY) != 0);
}
public static boolean usesDefactProperty(final int vcardType) {
return ((vcardType & FLAG_USE_DEFACT_PROPERTY) != 0);
}
public static boolean showPerformanceLog() {
return (VCardConfig.LOG_LEVEL & VCardConfig.LOG_LEVEL_PERFORMANCE_MEASUREMENT) != 0;
}
public static boolean shouldRefrainQPToNameProperties(final int vcardType) {
return (!shouldUseQuotedPrintable(vcardType) ||
((vcardType & FLAG_REFRAIN_QP_TO_NAME_PROPERTIES) != 0));
}
public static boolean appendTypeParamName(final int vcardType) {
return (isV30(vcardType) || ((vcardType & FLAG_APPEND_TYPE_PARAM) != 0));
}
/**
* @return true if the device is Japanese and some Japanese convension is
* applied to creating "formatted" something like FORMATTED_ADDRESS.
*/
public static boolean isJapaneseDevice(final int vcardType) {
// TODO: Some mask will be required so that this method wrongly interpret
// Japanese"-like" vCard type.
// e.g. VCARD_TYPE_V21_JAPANESE_SJIS | FLAG_APPEND_TYPE_PARAMS
return sJapaneseMobileTypeSet.contains(vcardType);
}
/* package */ static boolean refrainPhoneNumberFormatting(final int vcardType) {
return ((vcardType & FLAG_REFRAIN_PHONE_NUMBER_FORMATTING) != 0);
}
public static boolean needsToConvertPhoneticString(final int vcardType) {
return ((vcardType & FLAG_CONVERT_PHONETIC_NAME_STRINGS) != 0);
}
public static boolean onlyOneNoteFieldIsAvailable(final int vcardType) {
return vcardType == VCARD_TYPE_DOCOMO;
}
public static boolean isDoCoMo(final int vcardType) {
return ((vcardType & FLAG_DOCOMO) != 0);
}
private VCardConfig() {
}
}
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