1 /* 2 * Copyright (C) 2014 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 com.android.inputmethod.latin.utils; 18 19 import android.view.inputmethod.InputMethodSubtype; 20 21 import com.android.inputmethod.latin.RichInputMethodSubtype; 22 23 import java.util.Collections; 24 import java.util.List; 25 import java.util.Locale; 26 27 import javax.annotation.Nonnull; 28 29 /** 30 * This class determines that the language name on the spacebar should be displayed in what format. 31 */ 32 public final class LanguageOnSpacebarUtils { 33 public static final int FORMAT_TYPE_NONE = 0; 34 public static final int FORMAT_TYPE_LANGUAGE_ONLY = 1; 35 public static final int FORMAT_TYPE_FULL_LOCALE = 2; 36 37 private static List<InputMethodSubtype> sEnabledSubtypes = Collections.emptyList(); 38 private static boolean sIsSystemLanguageSameAsInputLanguage; 39 LanguageOnSpacebarUtils()40 private LanguageOnSpacebarUtils() { 41 // This utility class is not publicly instantiable. 42 } 43 getLanguageOnSpacebarFormatType( @onnull final RichInputMethodSubtype subtype)44 public static int getLanguageOnSpacebarFormatType( 45 @Nonnull final RichInputMethodSubtype subtype) { 46 if (subtype.isNoLanguage()) { 47 return FORMAT_TYPE_FULL_LOCALE; 48 } 49 // Only this subtype is enabled and equals to the system locale. 50 if (sEnabledSubtypes.size() < 2 && sIsSystemLanguageSameAsInputLanguage) { 51 return FORMAT_TYPE_NONE; 52 } 53 final Locale locale = subtype.getLocale(); 54 if (locale == null) { 55 return FORMAT_TYPE_NONE; 56 } 57 final String keyboardLanguage = locale.getLanguage(); 58 final String keyboardLayout = subtype.getKeyboardLayoutSetName(); 59 int sameLanguageAndLayoutCount = 0; 60 for (final InputMethodSubtype ims : sEnabledSubtypes) { 61 final String language = SubtypeLocaleUtils.getSubtypeLocale(ims).getLanguage(); 62 if (keyboardLanguage.equals(language) && keyboardLayout.equals( 63 SubtypeLocaleUtils.getKeyboardLayoutSetName(ims))) { 64 sameLanguageAndLayoutCount++; 65 } 66 } 67 // Display full locale name only when there are multiple subtypes that have the same 68 // locale and keyboard layout. Otherwise displaying language name is enough. 69 return sameLanguageAndLayoutCount > 1 ? FORMAT_TYPE_FULL_LOCALE 70 : FORMAT_TYPE_LANGUAGE_ONLY; 71 } 72 setEnabledSubtypes(@onnull final List<InputMethodSubtype> enabledSubtypes)73 public static void setEnabledSubtypes(@Nonnull final List<InputMethodSubtype> enabledSubtypes) { 74 sEnabledSubtypes = enabledSubtypes; 75 } 76 onSubtypeChanged(@onnull final RichInputMethodSubtype subtype, final boolean implicitlyEnabledSubtype, @Nonnull final Locale systemLocale)77 public static void onSubtypeChanged(@Nonnull final RichInputMethodSubtype subtype, 78 final boolean implicitlyEnabledSubtype, @Nonnull final Locale systemLocale) { 79 final Locale newLocale = subtype.getLocale(); 80 if (systemLocale.equals(newLocale)) { 81 sIsSystemLanguageSameAsInputLanguage = true; 82 return; 83 } 84 if (!systemLocale.getLanguage().equals(newLocale.getLanguage())) { 85 sIsSystemLanguageSameAsInputLanguage = false; 86 return; 87 } 88 // If the subtype is enabled explicitly, the language name should be displayed even when 89 // the keyboard language and the system language are equal. 90 sIsSystemLanguageSameAsInputLanguage = implicitlyEnabledSubtype; 91 } 92 } 93