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      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.settings.inputmethod;
     18 
     19 import android.app.AlertDialog.Builder;
     20 import android.content.ActivityNotFoundException;
     21 import android.content.Context;
     22 import android.content.DialogInterface;
     23 import android.content.Intent;
     24 import android.support.v7.preference.PreferenceViewHolder;
     25 import android.text.TextUtils;
     26 import android.view.View;
     27 import android.view.View.OnClickListener;
     28 import android.view.textservice.SpellCheckerInfo;
     29 
     30 import com.android.settings.CustomListPreference;
     31 import com.android.settings.R;
     32 
     33 /**
     34  * Spell checker service preference.
     35  *
     36  * This preference represents a spell checker service. It is used for two purposes. 1) A radio
     37  * button on the left side is used to choose the current spell checker service. 2) A settings
     38  * icon on the right side is used to invoke the setting activity of the spell checker service.
     39  */
     40 class SpellCheckerPreference extends CustomListPreference {
     41 
     42     private final SpellCheckerInfo[] mScis;
     43     private Intent mIntent;
     44 
     45     public SpellCheckerPreference(final Context context, final SpellCheckerInfo[] scis) {
     46         super(context, null);
     47         mScis = scis;
     48         setWidgetLayoutResource(R.layout.preference_widget_gear);
     49         CharSequence[] labels = new CharSequence[scis.length];
     50         CharSequence[] values = new CharSequence[scis.length];
     51         for (int i = 0 ; i < scis.length; i++) {
     52             labels[i] = scis[i].loadLabel(context.getPackageManager());
     53             // Use values as indexing since ListPreference doesn't support generic objects.
     54             values[i] = String.valueOf(i);
     55         }
     56         setEntries(labels);
     57         setEntryValues(values);
     58     }
     59 
     60     @Override
     61     protected void onPrepareDialogBuilder(Builder builder,
     62             DialogInterface.OnClickListener listener) {
     63         builder.setTitle(R.string.choose_spell_checker);
     64         builder.setSingleChoiceItems(getEntries(), findIndexOfValue(getValue()), listener);
     65     }
     66 
     67     public void setSelected(SpellCheckerInfo currentSci) {
     68         if (currentSci == null) {
     69             setValue(null);
     70             return;
     71         }
     72         for (int i = 0; i < mScis.length; i++) {
     73             if (mScis[i].getId().equals(currentSci.getId())) {
     74                 setValueIndex(i);
     75                 return;
     76             }
     77         }
     78     }
     79 
     80     @Override
     81     public void setValue(String value) {
     82         super.setValue(value);
     83         int index = value != null ? Integer.parseInt(value) : -1;
     84         if (index == -1) {
     85             mIntent = null;
     86             return;
     87         }
     88         SpellCheckerInfo sci = mScis[index];
     89         final String settingsActivity = sci.getSettingsActivity();
     90         if (TextUtils.isEmpty(settingsActivity)) {
     91             mIntent = null;
     92         } else {
     93             mIntent = new Intent(Intent.ACTION_MAIN);
     94             mIntent.setClassName(sci.getPackageName(), settingsActivity);
     95         }
     96     }
     97 
     98     @Override
     99     public boolean callChangeListener(Object newValue) {
    100         newValue = newValue != null ? mScis[Integer.parseInt((String) newValue)] : null;
    101         return super.callChangeListener(newValue);
    102     }
    103 
    104     @Override
    105     public void onBindViewHolder(PreferenceViewHolder view) {
    106         super.onBindViewHolder(view);
    107         View settingsButton = view.findViewById(R.id.settings_button);
    108         settingsButton.setVisibility(mIntent != null ? View.VISIBLE : View.INVISIBLE);
    109         settingsButton.setOnClickListener(new OnClickListener() {
    110             @Override
    111             public void onClick(View v) {
    112                 onSettingsButtonClicked();
    113             }
    114         });
    115     }
    116 
    117     private void onSettingsButtonClicked() {
    118         final Context context = getContext();
    119         try {
    120             final Intent intent = mIntent;
    121             if (intent != null) {
    122                 // Invoke a settings activity of an spell checker.
    123                 context.startActivity(intent);
    124             }
    125         } catch (final ActivityNotFoundException e) {
    126         }
    127     }
    128 }
    129