diff options
Diffstat (limited to 'java/com/android/dialer/smartdial/map/CompositeSmartDialMap.java')
-rw-r--r-- | java/com/android/dialer/smartdial/map/CompositeSmartDialMap.java | 172 |
1 files changed, 172 insertions, 0 deletions
diff --git a/java/com/android/dialer/smartdial/map/CompositeSmartDialMap.java b/java/com/android/dialer/smartdial/map/CompositeSmartDialMap.java new file mode 100644 index 000000000..df32d4ce7 --- /dev/null +++ b/java/com/android/dialer/smartdial/map/CompositeSmartDialMap.java @@ -0,0 +1,172 @@ +/* + * Copyright (C) 2017 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.dialer.smartdial.map; + +import android.content.Context; +import android.support.annotation.VisibleForTesting; +import android.support.v4.util.SimpleArrayMap; +import com.android.dialer.compat.CompatUtils; +import com.android.dialer.configprovider.ConfigProviderBindings; +import com.google.common.base.Optional; + +/** + * A utility class that combines the functionality of two implementations of {@link SmartDialMap} so + * that we support smart dial for dual alphabets. + * + * <p>Of the two implementations of {@link SmartDialMap}, the default one always takes precedence. + * The second one is consulted only when the default one is unable to provide a valid result. + * + * <p>Note that the second implementation can be absent if it is not defined for the system's 1st + * language preference. + */ +@SuppressWarnings("Guava") +public class CompositeSmartDialMap { + @VisibleForTesting + public static final String FLAG_ENABLE_DUAL_ALPHABETS = "enable_dual_alphabets_on_t9"; + + private static final SmartDialMap DEFAULT_MAP = LatinSmartDialMap.getInstance(); + + // A map in which each key is an ISO 639-2 language code and the corresponding value is a + // SmartDialMap + private static final SimpleArrayMap<String, SmartDialMap> EXTRA_MAPS = new SimpleArrayMap<>(); + + static { + EXTRA_MAPS.put("bul", BulgarianSmartDialMap.getInstance()); + EXTRA_MAPS.put("rus", RussianSmartDialMap.getInstance()); + EXTRA_MAPS.put("ukr", UkrainianSmartDialMap.getInstance()); + } + + private CompositeSmartDialMap() {} + + /** + * Returns true if the provided character can be mapped to a key on the dialpad. + * + * <p>The provided character is expected to be a normalized character. See {@link + * SmartDialMap#normalizeCharacter(char)} for details. + */ + public static boolean isValidDialpadCharacter(Context context, char ch) { + if (DEFAULT_MAP.isValidDialpadCharacter(ch)) { + return true; + } + + Optional<SmartDialMap> extraMap = getExtraMap(context); + return extraMap.isPresent() && extraMap.get().isValidDialpadCharacter(ch); + } + + /** + * Returns true if the provided character is a letter, and can be mapped to a key on the dialpad. + * + * <p>The provided character is expected to be a normalized character. See {@link + * SmartDialMap#normalizeCharacter(char)} for details. + */ + public static boolean isValidDialpadAlphabeticChar(Context context, char ch) { + if (DEFAULT_MAP.isValidDialpadAlphabeticChar(ch)) { + return true; + } + + Optional<SmartDialMap> extraMap = getExtraMap(context); + return extraMap.isPresent() && extraMap.get().isValidDialpadAlphabeticChar(ch); + } + + /** + * Returns true if the provided character is a digit, and can be mapped to a key on the dialpad. + */ + public static boolean isValidDialpadNumericChar(Context context, char ch) { + if (DEFAULT_MAP.isValidDialpadNumericChar(ch)) { + return true; + } + + Optional<SmartDialMap> extraMap = getExtraMap(context); + return extraMap.isPresent() && extraMap.get().isValidDialpadNumericChar(ch); + } + + /** + * Get the index of the key on the dialpad which the character corresponds to. + * + * <p>The provided character is expected to be a normalized character. See {@link + * SmartDialMap#normalizeCharacter(char)} for details. + * + * <p>If the provided character can't be mapped to a key on the dialpad, return -1. + */ + public static byte getDialpadIndex(Context context, char ch) { + Optional<Byte> dialpadIndex = DEFAULT_MAP.getDialpadIndex(ch); + if (dialpadIndex.isPresent()) { + return dialpadIndex.get(); + } + + Optional<SmartDialMap> extraMap = getExtraMap(context); + if (extraMap.isPresent()) { + dialpadIndex = extraMap.get().getDialpadIndex(ch); + } + + return dialpadIndex.isPresent() ? dialpadIndex.get() : -1; + } + + /** + * Get the actual numeric character on the dialpad which the character corresponds to. + * + * <p>The provided character is expected to be a normalized character. See {@link + * SmartDialMap#normalizeCharacter(char)} for details. + * + * <p>If the provided character can't be mapped to a key on the dialpad, return the character. + */ + public static char getDialpadNumericCharacter(Context context, char ch) { + Optional<Character> dialpadNumericChar = DEFAULT_MAP.getDialpadNumericCharacter(ch); + if (dialpadNumericChar.isPresent()) { + return dialpadNumericChar.get(); + } + + Optional<SmartDialMap> extraMap = getExtraMap(context); + if (extraMap.isPresent()) { + dialpadNumericChar = extraMap.get().getDialpadNumericCharacter(ch); + } + + return dialpadNumericChar.isPresent() ? dialpadNumericChar.get() : ch; + } + + /** + * Converts uppercase characters to lower case ones, and on a best effort basis, strips accents + * from accented characters. + * + * <p>If the provided character can't be mapped to a key on the dialpad, return the character. + */ + public static char normalizeCharacter(Context context, char ch) { + Optional<Character> normalizedChar = DEFAULT_MAP.normalizeCharacter(ch); + if (normalizedChar.isPresent()) { + return normalizedChar.get(); + } + + Optional<SmartDialMap> extraMap = getExtraMap(context); + if (extraMap.isPresent()) { + normalizedChar = extraMap.get().normalizeCharacter(ch); + } + + return normalizedChar.isPresent() ? normalizedChar.get() : ch; + } + + @VisibleForTesting + static Optional<SmartDialMap> getExtraMap(Context context) { + if (!ConfigProviderBindings.get(context).getBoolean(FLAG_ENABLE_DUAL_ALPHABETS, false)) { + return Optional.absent(); + } + + String languageCode = CompatUtils.getLocale(context).getISO3Language(); + return EXTRA_MAPS.containsKey(languageCode) + ? Optional.of(EXTRA_MAPS.get(languageCode)) + : Optional.absent(); + } +} |