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
17package com.android.settings.inputmethod;
18
19import android.app.AlertDialog.Builder;
20import android.content.ActivityNotFoundException;
21import android.content.Context;
22import android.content.DialogInterface;
23import android.content.Intent;
24import android.support.v7.preference.ListPreference;
25import android.support.v7.preference.PreferenceViewHolder;
26import android.text.TextUtils;
27import android.view.View;
28import android.view.View.OnClickListener;
29import android.view.textservice.SpellCheckerInfo;
30
31import com.android.settings.CustomListPreference;
32import com.android.settings.R;
33
34/**
35 * Spell checker service preference.
36 *
37 * This preference represents a spell checker service. It is used for two purposes. 1) A radio
38 * button on the left side is used to choose the current spell checker service. 2) A settings
39 * icon on the right side is used to invoke the setting activity of the spell checker service.
40 */
41class SpellCheckerPreference extends CustomListPreference {
42
43    private final SpellCheckerInfo[] mScis;
44    private Intent mIntent;
45
46    public SpellCheckerPreference(final Context context, final SpellCheckerInfo[] scis) {
47        super(context, null);
48        mScis = scis;
49        setWidgetLayoutResource(R.layout.preference_widget_settings);
50        CharSequence[] labels = new CharSequence[scis.length];
51        CharSequence[] values = new CharSequence[scis.length];
52        for (int i = 0 ; i < scis.length; i++) {
53            labels[i] = scis[i].loadLabel(context.getPackageManager());
54            // Use values as indexing since ListPreference doesn't support generic objects.
55            values[i] = String.valueOf(i);
56        }
57        setEntries(labels);
58        setEntryValues(values);
59    }
60
61    @Override
62    protected void onPrepareDialogBuilder(Builder builder,
63            DialogInterface.OnClickListener listener) {
64        builder.setTitle(R.string.choose_spell_checker);
65        builder.setSingleChoiceItems(getEntries(), findIndexOfValue(getValue()), listener);
66    }
67
68    public void setSelected(SpellCheckerInfo currentSci) {
69        if (currentSci == null) {
70            setValue(null);
71            return;
72        }
73        for (int i = 0; i < mScis.length; i++) {
74            if (mScis[i].getId().equals(currentSci.getId())) {
75                setValueIndex(i);
76                return;
77            }
78        }
79    }
80
81    @Override
82    public void setValue(String value) {
83        super.setValue(value);
84        int index = value != null ? Integer.parseInt(value) : -1;
85        if (index == -1) {
86            mIntent = null;
87            return;
88        }
89        SpellCheckerInfo sci = mScis[index];
90        final String settingsActivity = sci.getSettingsActivity();
91        if (TextUtils.isEmpty(settingsActivity)) {
92            mIntent = null;
93        } else {
94            mIntent = new Intent(Intent.ACTION_MAIN);
95            mIntent.setClassName(sci.getPackageName(), settingsActivity);
96        }
97    }
98
99    @Override
100    public boolean callChangeListener(Object newValue) {
101        newValue = newValue != null ? mScis[Integer.parseInt((String) newValue)] : null;
102        return super.callChangeListener(newValue);
103    }
104
105    @Override
106    public void onBindViewHolder(PreferenceViewHolder view) {
107        super.onBindViewHolder(view);
108        View settingsButton = view.findViewById(R.id.settings_button);
109        settingsButton.setVisibility(mIntent != null ? View.VISIBLE : View.INVISIBLE);
110        settingsButton.setOnClickListener(new OnClickListener() {
111            @Override
112            public void onClick(View v) {
113                onSettingsButtonClicked();
114            }
115        });
116    }
117
118    private void onSettingsButtonClicked() {
119        final Context context = getContext();
120        try {
121            final Intent intent = mIntent;
122            if (intent != null) {
123                // Invoke a settings activity of an spell checker.
124                context.startActivity(intent);
125            }
126        } catch (final ActivityNotFoundException e) {
127        }
128    }
129}
130