Home | History | Annotate | Download | only in latin 
      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.Configuration;
     24 import android.content.res.Resources;
     25 import android.inputmethodservice.InputMethodService;
     26 import android.net.ConnectivityManager;
     27 import android.net.NetworkInfo;
     28 import android.os.AsyncTask;
     29 import android.os.IBinder;
     30 import android.util.Log;
     31 import android.view.inputmethod.InputMethodInfo;
     32 import android.view.inputmethod.InputMethodManager;
     33 import android.view.inputmethod.InputMethodSubtype;
     34 
     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 */ InputMethodManager mImm;
     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     // Note: This variable is always non-null after {@link #initialize(LatinIME)}.
     57     private InputMethodSubtype mCurrentSubtype;
     58     private Locale mCurrentSystemLocale;
     59     /*-----------------------------------------------------------*/
     60 
     61     private boolean mIsNetworkConnected;
     62 
     63     static final class NeedsToDisplayLanguage {
     64         private int mEnabledSubtypeCount;
     65         private boolean mIsSystemLanguageSameAsInputLanguage;
     66 
     67         public boolean getValue() {
     68             return mEnabledSubtypeCount >= 2 || !mIsSystemLanguageSameAsInputLanguage;
     69         }
     70 
     71         public void updateEnabledSubtypeCount(final int count) {
     72             mEnabledSubtypeCount = count;
     73         }
     74 
     75         public void updateIsSystemLanguageSameAsInputLanguage(final boolean isSame) {
     76             mIsSystemLanguageSameAsInputLanguage = isSame;
     77         }
     78     }
     79 
     80     public static SubtypeSwitcher getInstance() {
     81         return sInstance;
     82     }
     83 
     84     public static void init(final Context context) {
     85         SubtypeLocale.init(context);
     86         sInstance.initialize(context);
     87         sInstance.updateAllParameters(context);
     88     }
     89 
     90     private SubtypeSwitcher() {
     91         // Intentional empty constructor for singleton.
     92     }
     93 
     94     private void initialize(final Context service) {
     95         mResources = service.getResources();
     96         mImm = ImfUtils.getInputMethodManager(service);
     97         mConnectivityManager = (ConnectivityManager) service.getSystemService(
     98                 Context.CONNECTIVITY_SERVICE);
     99         mCurrentSystemLocale = mResources.getConfiguration().locale;
    100         mNoLanguageSubtype = ImfUtils.findSubtypeByLocaleAndKeyboardLayoutSet(
    101                 service, SubtypeLocale.NO_LANGUAGE, SubtypeLocale.QWERTY);
    102         mCurrentSubtype = ImfUtils.getCurrentInputMethodSubtype(service, mNoLanguageSubtype);
    103         if (mNoLanguageSubtype == null) {
    104             throw new RuntimeException("Can't find no lanugage with QWERTY subtype");
    105         }
    106 
    107         final NetworkInfo info = mConnectivityManager.getActiveNetworkInfo();
    108         mIsNetworkConnected = (info != null && info.isConnected());
    109     }
    110 
    111     // Update all parameters stored in SubtypeSwitcher.
    112     // Only configuration changed event is allowed to call this because this is heavy.
    113     private void updateAllParameters(final Context context) {
    114         mCurrentSystemLocale = mResources.getConfiguration().locale;
    115         updateSubtype(ImfUtils.getCurrentInputMethodSubtype(context, mNoLanguageSubtype));
    116         updateParametersOnStartInputViewAndReturnIfCurrentSubtypeEnabled();
    117     }
    118 
    119     /**
    120      * Update parameters which are changed outside LatinIME. This parameters affect UI so they
    121      * should be updated every time onStartInputView.
    122      *
    123      * @return true if the current subtype is enabled.
    124      */
    125     public boolean updateParametersOnStartInputViewAndReturnIfCurrentSubtypeEnabled() {
    126         final boolean currentSubtypeEnabled =
    127                 updateEnabledSubtypesAndReturnIfEnabled(mCurrentSubtype);
    128         updateShortcutIME();
    129         return currentSubtypeEnabled;
    130     }
    131 
    132     /**
    133      * Update enabled subtypes from the framework.
    134      *
    135      * @param subtype the subtype to be checked
    136      * @return true if the {@code subtype} is enabled.
    137      */
    138     private boolean updateEnabledSubtypesAndReturnIfEnabled(final InputMethodSubtype subtype) {
    139         final List<InputMethodSubtype> enabledSubtypesOfThisIme =
    140                 mImm.getEnabledInputMethodSubtypeList(null, true);
    141         mNeedsToDisplayLanguage.updateEnabledSubtypeCount(enabledSubtypesOfThisIme.size());
    142 
    143         for (final InputMethodSubtype ims : enabledSubtypesOfThisIme) {
    144             if (ims.equals(subtype)) {
    145                 return true;
    146             }
    147         }
    148         if (DBG) {
    149             Log.w(TAG, "Subtype: " + subtype.getLocale() + "/" + subtype.getExtraValue()
    150                     + " was disabled");
    151         }
    152         return false;
    153     }
    154 
    155     private void updateShortcutIME() {
    156         if (DBG) {
    157             Log.d(TAG, "Update shortcut IME from : "
    158                     + (mShortcutInputMethodInfo == null
    159                             ? "<null>" : mShortcutInputMethodInfo.getId()) + ", "
    160                     + (mShortcutSubtype == null ? "<null>" : (
    161                             mShortcutSubtype.getLocale() + ", " + mShortcutSubtype.getMode())));
    162         }
    163         // TODO: Update an icon for shortcut IME
    164         final Map<InputMethodInfo, List<InputMethodSubtype>> shortcuts =
    165                 mImm.getShortcutInputMethodsAndSubtypes();
    166         mShortcutInputMethodInfo = null;
    167         mShortcutSubtype = null;
    168         for (final InputMethodInfo imi : shortcuts.keySet()) {
    169             final List<InputMethodSubtype> subtypes = shortcuts.get(imi);
    170             // TODO: Returns the first found IMI for now. Should handle all shortcuts as
    171             // appropriate.
    172             mShortcutInputMethodInfo = imi;
    173             // TODO: Pick up the first found subtype for now. Should handle all subtypes
    174             // as appropriate.
    175             mShortcutSubtype = subtypes.size() > 0 ? subtypes.get(0) : null;
    176             break;
    177         }
    178         if (DBG) {
    179             Log.d(TAG, "Update shortcut IME to : "
    180                     + (mShortcutInputMethodInfo == null
    181                             ? "<null>" : mShortcutInputMethodInfo.getId()) + ", "
    182                     + (mShortcutSubtype == null ? "<null>" : (
    183                             mShortcutSubtype.getLocale() + ", " + mShortcutSubtype.getMode())));
    184         }
    185     }
    186 
    187     // Update the current subtype. LatinIME.onCurrentInputMethodSubtypeChanged calls this function.
    188     public void updateSubtype(InputMethodSubtype newSubtype) {
    189         if (DBG) {
    190             Log.w(TAG, "onCurrentInputMethodSubtypeChanged: to: "
    191                     + newSubtype.getLocale() + "/" + newSubtype.getExtraValue() + ", from: "
    192                     + mCurrentSubtype.getLocale() + "/" + mCurrentSubtype.getExtraValue());
    193         }
    194 
    195         final Locale newLocale = SubtypeLocale.getSubtypeLocale(newSubtype);
    196         mNeedsToDisplayLanguage.updateIsSystemLanguageSameAsInputLanguage(
    197                 mCurrentSystemLocale.equals(newLocale));
    198 
    199         if (newSubtype.equals(mCurrentSubtype)) return;
    200 
    201         mCurrentSubtype = newSubtype;
    202         updateShortcutIME();
    203     }
    204 
    205     ////////////////////////////
    206     // Shortcut IME functions //
    207     ////////////////////////////
    208 
    209     public void switchToShortcutIME(final InputMethodService context) {
    210         if (mShortcutInputMethodInfo == null) {
    211             return;
    212         }
    213 
    214         final String imiId = mShortcutInputMethodInfo.getId();
    215         switchToTargetIME(imiId, mShortcutSubtype, context);
    216     }
    217 
    218     private void switchToTargetIME(final String imiId, final InputMethodSubtype subtype,
    219             final InputMethodService context) {
    220         final IBinder token = context.getWindow().getWindow().getAttributes().token;
    221         if (token == null) {
    222             return;
    223         }
    224         final InputMethodManager imm = mImm;
    225         new AsyncTask<Void, Void, Void>() {
    226             @Override
    227             protected Void doInBackground(Void... params) {
    228                 imm.setInputMethodAndSubtype(token, imiId, subtype);
    229                 return null;
    230             }
    231         }.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
    232     }
    233 
    234     public boolean isShortcutImeEnabled() {
    235         if (mShortcutInputMethodInfo == null) {
    236             return false;
    237         }
    238         if (mShortcutSubtype == null) {
    239             return true;
    240         }
    241         final boolean allowsImplicitlySelectedSubtypes = true;
    242         for (final InputMethodSubtype enabledSubtype : mImm.getEnabledInputMethodSubtypeList(
    243                 mShortcutInputMethodInfo, allowsImplicitlySelectedSubtypes)) {
    244             if (enabledSubtype.equals(mShortcutSubtype)) {
    245                 return true;
    246             }
    247         }
    248         return false;
    249     }
    250 
    251     public boolean isShortcutImeReady() {
    252         if (mShortcutInputMethodInfo == null)
    253             return false;
    254         if (mShortcutSubtype == null)
    255             return true;
    256         if (mShortcutSubtype.containsExtraValueKey(REQ_NETWORK_CONNECTIVITY)) {
    257             return mIsNetworkConnected;
    258         }
    259         return true;
    260     }
    261 
    262     public void onNetworkStateChanged(final Intent intent) {
    263         final boolean noConnection = intent.getBooleanExtra(
    264                 ConnectivityManager.EXTRA_NO_CONNECTIVITY, false);
    265         mIsNetworkConnected = !noConnection;
    266 
    267         KeyboardSwitcher.getInstance().onNetworkStateChanged();
    268     }
    269 
    270     //////////////////////////////////
    271     // Subtype Switching functions //
    272     //////////////////////////////////
    273 
    274     public boolean needsToDisplayLanguage(final Locale keyboardLocale) {
    275         if (keyboardLocale.toString().equals(SubtypeLocale.NO_LANGUAGE)) {
    276             return true;
    277         }
    278         if (!keyboardLocale.equals(getCurrentSubtypeLocale())) {
    279             return false;
    280         }
    281         return mNeedsToDisplayLanguage.getValue();
    282     }
    283 
    284     public Locale getCurrentSubtypeLocale() {
    285         return SubtypeLocale.getSubtypeLocale(mCurrentSubtype);
    286     }
    287 
    288     public boolean onConfigurationChanged(final Configuration conf, final Context context) {
    289         final Locale systemLocale = conf.locale;
    290         final boolean systemLocaleChanged = !systemLocale.equals(mCurrentSystemLocale);
    291         // If system configuration was changed, update all parameters.
    292         if (systemLocaleChanged) {
    293             updateAllParameters(context);
    294         }
    295         return systemLocaleChanged;
    296     }
    297 
    298     public InputMethodSubtype getCurrentSubtype() {
    299         return mCurrentSubtype;
    300     }
    301 
    302     public InputMethodSubtype getNoLanguageSubtype() {
    303         return mNoLanguageSubtype;
    304     }
    305 }
    306