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      1 /*
      2  * Copyright (C) 2010 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;
     18 
     19 import static com.android.inputmethod.latin.Constants.Subtype.ExtraValue.REQ_NETWORK_CONNECTIVITY;
     20 
     21 import android.content.Context;
     22 import android.content.Intent;
     23 import android.content.res.Resources;
     24 import android.inputmethodservice.InputMethodService;
     25 import android.net.ConnectivityManager;
     26 import android.net.NetworkInfo;
     27 import android.os.AsyncTask;
     28 import android.os.IBinder;
     29 import android.util.Log;
     30 import android.view.inputmethod.InputMethodInfo;
     31 import android.view.inputmethod.InputMethodManager;
     32 import android.view.inputmethod.InputMethodSubtype;
     33 
     34 import com.android.inputmethod.annotations.UsedForTesting;
     35 import com.android.inputmethod.keyboard.KeyboardSwitcher;
     36 
     37 import java.util.List;
     38 import java.util.Locale;
     39 import java.util.Map;
     40 
     41 public final class SubtypeSwitcher {
     42     private static boolean DBG = LatinImeLogger.sDBG;
     43     private static final String TAG = SubtypeSwitcher.class.getSimpleName();
     44 
     45     private static final SubtypeSwitcher sInstance = new SubtypeSwitcher();
     46     private /* final */ RichInputMethodManager mRichImm;
     47     private /* final */ Resources mResources;
     48     private /* final */ ConnectivityManager mConnectivityManager;
     49 
     50     /*-----------------------------------------------------------*/
     51     // Variants which should be changed only by reload functions.
     52     private NeedsToDisplayLanguage mNeedsToDisplayLanguage = new NeedsToDisplayLanguage();
     53     private InputMethodInfo mShortcutInputMethodInfo;
     54     private InputMethodSubtype mShortcutSubtype;
     55     private InputMethodSubtype mNoLanguageSubtype;
     56     /*-----------------------------------------------------------*/
     57 
     58     private boolean mIsNetworkConnected;
     59 
     60     static final class NeedsToDisplayLanguage {
     61         private int mEnabledSubtypeCount;
     62         private boolean mIsSystemLanguageSameAsInputLanguage;
     63 
     64         public boolean getValue() {
     65             return mEnabledSubtypeCount >= 2 || !mIsSystemLanguageSameAsInputLanguage;
     66         }
     67 
     68         public void updateEnabledSubtypeCount(final int count) {
     69             mEnabledSubtypeCount = count;
     70         }
     71 
     72         public void updateIsSystemLanguageSameAsInputLanguage(final boolean isSame) {
     73             mIsSystemLanguageSameAsInputLanguage = isSame;
     74         }
     75     }
     76 
     77     public static SubtypeSwitcher getInstance() {
     78         return sInstance;
     79     }
     80 
     81     public static void init(final Context context) {
     82         SubtypeLocale.init(context);
     83         RichInputMethodManager.init(context);
     84         sInstance.initialize(context);
     85     }
     86 
     87     private SubtypeSwitcher() {
     88         // Intentional empty constructor for singleton.
     89     }
     90 
     91     private void initialize(final Context context) {
     92         if (mResources != null) {
     93             return;
     94         }
     95         mResources = context.getResources();
     96         mRichImm = RichInputMethodManager.getInstance();
     97         mConnectivityManager = (ConnectivityManager) context.getSystemService(
     98                 Context.CONNECTIVITY_SERVICE);
     99         mNoLanguageSubtype = mRichImm.findSubtypeByLocaleAndKeyboardLayoutSet(
    100                 SubtypeLocale.NO_LANGUAGE, SubtypeLocale.QWERTY);
    101         if (mNoLanguageSubtype == null) {
    102             throw new RuntimeException("Can't find no lanugage with QWERTY subtype");
    103         }
    104 
    105         final NetworkInfo info = mConnectivityManager.getActiveNetworkInfo();
    106         mIsNetworkConnected = (info != null && info.isConnected());
    107 
    108         onSubtypeChanged(getCurrentSubtype());
    109         updateParametersOnStartInputView();
    110     }
    111 
    112     /**
    113      * Update parameters which are changed outside LatinIME. This parameters affect UI so that they
    114      * should be updated every time onStartInputView is called.
    115      */
    116     public void updateParametersOnStartInputView() {
    117         final List<InputMethodSubtype> enabledSubtypesOfThisIme =
    118                 mRichImm.getMyEnabledInputMethodSubtypeList(true);
    119         mNeedsToDisplayLanguage.updateEnabledSubtypeCount(enabledSubtypesOfThisIme.size());
    120         updateShortcutIME();
    121     }
    122 
    123     private void updateShortcutIME() {
    124         if (DBG) {
    125             Log.d(TAG, "Update shortcut IME from : "
    126                     + (mShortcutInputMethodInfo == null
    127                             ? "<null>" : mShortcutInputMethodInfo.getId()) + ", "
    128                     + (mShortcutSubtype == null ? "<null>" : (
    129                             mShortcutSubtype.getLocale() + ", " + mShortcutSubtype.getMode())));
    130         }
    131         // TODO: Update an icon for shortcut IME
    132         final Map<InputMethodInfo, List<InputMethodSubtype>> shortcuts =
    133                 mRichImm.getInputMethodManager().getShortcutInputMethodsAndSubtypes();
    134         mShortcutInputMethodInfo = null;
    135         mShortcutSubtype = null;
    136         for (final InputMethodInfo imi : shortcuts.keySet()) {
    137             final List<InputMethodSubtype> subtypes = shortcuts.get(imi);
    138             // TODO: Returns the first found IMI for now. Should handle all shortcuts as
    139             // appropriate.
    140             mShortcutInputMethodInfo = imi;
    141             // TODO: Pick up the first found subtype for now. Should handle all subtypes
    142             // as appropriate.
    143             mShortcutSubtype = subtypes.size() > 0 ? subtypes.get(0) : null;
    144             break;
    145         }
    146         if (DBG) {
    147             Log.d(TAG, "Update shortcut IME to : "
    148                     + (mShortcutInputMethodInfo == null
    149                             ? "<null>" : mShortcutInputMethodInfo.getId()) + ", "
    150                     + (mShortcutSubtype == null ? "<null>" : (
    151                             mShortcutSubtype.getLocale() + ", " + mShortcutSubtype.getMode())));
    152         }
    153     }
    154 
    155     // Update the current subtype. LatinIME.onCurrentInputMethodSubtypeChanged calls this function.
    156     public void onSubtypeChanged(final InputMethodSubtype newSubtype) {
    157         if (DBG) {
    158             Log.w(TAG, "onSubtypeChanged: " + SubtypeLocale.getSubtypeDisplayName(newSubtype));
    159         }
    160 
    161         final Locale newLocale = SubtypeLocale.getSubtypeLocale(newSubtype);
    162         final Locale systemLocale = mResources.getConfiguration().locale;
    163         final boolean sameLocale = systemLocale.equals(newLocale);
    164         final boolean sameLanguage = systemLocale.getLanguage().equals(newLocale.getLanguage());
    165         final boolean implicitlyEnabled =
    166                 mRichImm.checkIfSubtypeBelongsToThisImeAndImplicitlyEnabled(newSubtype);
    167         mNeedsToDisplayLanguage.updateIsSystemLanguageSameAsInputLanguage(
    168                 sameLocale || (sameLanguage && implicitlyEnabled));
    169 
    170         updateShortcutIME();
    171     }
    172 
    173     ////////////////////////////
    174     // Shortcut IME functions //
    175     ////////////////////////////
    176 
    177     public void switchToShortcutIME(final InputMethodService context) {
    178         if (mShortcutInputMethodInfo == null) {
    179             return;
    180         }
    181 
    182         final String imiId = mShortcutInputMethodInfo.getId();
    183         switchToTargetIME(imiId, mShortcutSubtype, context);
    184     }
    185 
    186     private void switchToTargetIME(final String imiId, final InputMethodSubtype subtype,
    187             final InputMethodService context) {
    188         final IBinder token = context.getWindow().getWindow().getAttributes().token;
    189         if (token == null) {
    190             return;
    191         }
    192         final InputMethodManager imm = mRichImm.getInputMethodManager();
    193         new AsyncTask<Void, Void, Void>() {
    194             @Override
    195             protected Void doInBackground(Void... params) {
    196                 imm.setInputMethodAndSubtype(token, imiId, subtype);
    197                 return null;
    198             }
    199         }.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
    200     }
    201 
    202     public boolean isShortcutImeEnabled() {
    203         if (mShortcutInputMethodInfo == null) {
    204             return false;
    205         }
    206         if (mShortcutSubtype == null) {
    207             return true;
    208         }
    209         return mRichImm.checkIfSubtypeBelongsToImeAndEnabled(
    210                 mShortcutInputMethodInfo, mShortcutSubtype);
    211     }
    212 
    213     public boolean isShortcutImeReady() {
    214         if (mShortcutInputMethodInfo == null)
    215             return false;
    216         if (mShortcutSubtype == null)
    217             return true;
    218         if (mShortcutSubtype.containsExtraValueKey(REQ_NETWORK_CONNECTIVITY)) {
    219             return mIsNetworkConnected;
    220         }
    221         return true;
    222     }
    223 
    224     public void onNetworkStateChanged(final Intent intent) {
    225         final boolean noConnection = intent.getBooleanExtra(
    226                 ConnectivityManager.EXTRA_NO_CONNECTIVITY, false);
    227         mIsNetworkConnected = !noConnection;
    228 
    229         KeyboardSwitcher.getInstance().onNetworkStateChanged();
    230     }
    231 
    232     //////////////////////////////////
    233     // Subtype Switching functions //
    234     //////////////////////////////////
    235 
    236     public boolean needsToDisplayLanguage(final Locale keyboardLocale) {
    237         if (keyboardLocale.toString().equals(SubtypeLocale.NO_LANGUAGE)) {
    238             return true;
    239         }
    240         if (!keyboardLocale.equals(getCurrentSubtypeLocale())) {
    241             return false;
    242         }
    243         return mNeedsToDisplayLanguage.getValue();
    244     }
    245 
    246     private static Locale sForcedLocaleForTesting = null;
    247     @UsedForTesting
    248     void forceLocale(final Locale locale) {
    249         sForcedLocaleForTesting = locale;
    250     }
    251 
    252     public Locale getCurrentSubtypeLocale() {
    253         if (null != sForcedLocaleForTesting) return sForcedLocaleForTesting;
    254         return SubtypeLocale.getSubtypeLocale(getCurrentSubtype());
    255     }
    256 
    257     public InputMethodSubtype getCurrentSubtype() {
    258         return mRichImm.getCurrentInputMethodSubtype(mNoLanguageSubtype);
    259     }
    260 
    261     public InputMethodSubtype getNoLanguageSubtype() {
    262         return mNoLanguageSubtype;
    263     }
    264 }
    265