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      1 /*
      2  * Copyright (C) 2016 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.tv.settings.system;
     18 
     19 import android.app.Activity;
     20 import android.content.BroadcastReceiver;
     21 import android.content.Context;
     22 import android.content.Intent;
     23 import android.content.IntentFilter;
     24 import android.os.Bundle;
     25 import android.support.annotation.NonNull;
     26 import android.support.v4.content.LocalBroadcastManager;
     27 import android.view.LayoutInflater;
     28 import android.view.View;
     29 import android.view.ViewGroup;
     30 import android.view.accessibility.CaptioningManager;
     31 
     32 import com.android.internal.widget.SubtitleView;
     33 import com.android.settingslib.accessibility.AccessibilityUtils;
     34 import com.android.tv.settings.BaseSettingsFragment;
     35 import com.android.tv.settings.R;
     36 
     37 import java.util.Locale;
     38 
     39 public class CaptionSettingsFragment extends BaseSettingsFragment {
     40 
     41     public static final String ACTION_REFRESH_CAPTIONS_PREVIEW = "CaptionSettingsFragment.refresh";
     42 
     43     private int mDefaultFontSize;
     44 
     45     private SubtitleView mPreviewText;
     46     private View mPreviewWindow;
     47     private CaptioningManager mCaptioningManager;
     48     private final CaptioningManager.CaptioningChangeListener mCaptionChangeListener =
     49             new CaptioningManager.CaptioningChangeListener() {
     50 
     51                 @Override
     52                 public void onEnabledChanged(boolean enabled) {
     53                     refreshPreviewText();
     54                 }
     55 
     56                 @Override
     57                 public void onUserStyleChanged(@NonNull CaptioningManager.CaptionStyle userStyle) {
     58                     loadCaptionSettings();
     59                     refreshPreviewText();
     60                 }
     61 
     62                 @Override
     63                 public void onLocaleChanged(Locale locale) {
     64                     loadCaptionSettings();
     65                     refreshPreviewText();
     66                 }
     67 
     68                 @Override
     69                 public void onFontScaleChanged(float fontScale) {
     70                     loadCaptionSettings();
     71                     refreshPreviewText();
     72                 }
     73             };
     74     private final BroadcastReceiver mRefreshReceiver = new BroadcastReceiver() {
     75         @Override
     76         public void onReceive(Context context, Intent intent) {
     77             refreshPreviewText();
     78         }
     79     };
     80 
     81     private float mFontScale;
     82     private int mStyleId;
     83     private Locale mLocale;
     84 
     85     public static CaptionSettingsFragment newInstance() {
     86         return new CaptionSettingsFragment();
     87     }
     88 
     89     @Override
     90     public View onCreateView(LayoutInflater inflater, ViewGroup container,
     91             Bundle savedInstanceState) {
     92         final ViewGroup v = (ViewGroup) super.onCreateView(inflater, container, savedInstanceState);
     93         if (v == null) {
     94             throw new IllegalStateException("Unexpectedly null view from super");
     95         }
     96         inflater.inflate(R.layout.captioning_preview, v, true);
     97         return v;
     98     }
     99 
    100     @Override
    101     public void onCreate(Bundle savedInstanceState) {
    102         super.onCreate(savedInstanceState);
    103 
    104         mCaptioningManager =
    105                 (CaptioningManager) getActivity().getSystemService(Context.CAPTIONING_SERVICE);
    106 
    107         mDefaultFontSize =
    108                 getResources().getInteger(R.integer.captioning_preview_default_font_size);
    109 
    110         loadCaptionSettings();
    111     }
    112 
    113     @Override
    114     public void onViewCreated(View view, Bundle savedInstanceState) {
    115         super.onViewCreated(view, savedInstanceState);
    116         mPreviewText = view.findViewById(R.id.preview_text);
    117         mPreviewWindow = view.findViewById(R.id.preview_window);
    118     }
    119 
    120     @Override
    121     public void onPreferenceStartInitialScreen() {
    122         startPreferenceFragment(CaptionFragment.newInstance());
    123     }
    124 
    125     @Override
    126     public void onStart() {
    127         super.onStart();
    128         mCaptioningManager.addCaptioningChangeListener (mCaptionChangeListener);
    129         LocalBroadcastManager.getInstance(getContext()).registerReceiver(mRefreshReceiver,
    130                 new IntentFilter(ACTION_REFRESH_CAPTIONS_PREVIEW));
    131         refreshPreviewText();
    132     }
    133 
    134     @Override
    135     public void onStop() {
    136         super.onStop();
    137         mCaptioningManager.removeCaptioningChangeListener (mCaptionChangeListener);
    138         LocalBroadcastManager.getInstance(getContext()).unregisterReceiver(mRefreshReceiver);
    139     }
    140 
    141     private void loadCaptionSettings() {
    142         mFontScale = mCaptioningManager.getFontScale();
    143         mStyleId = mCaptioningManager.getRawUserStyle();
    144         mLocale = mCaptioningManager.getLocale();
    145     }
    146 
    147     private void refreshPreviewText() {
    148         if (mPreviewText != null) {
    149             boolean enabled = mCaptioningManager.isEnabled();
    150             if (enabled) {
    151                 mPreviewText.setVisibility(View.VISIBLE);
    152                 Activity activity = getActivity();
    153                 mPreviewText.setStyle(mStyleId);
    154                 mPreviewText.setTextSize(mFontScale * mDefaultFontSize);
    155                 if (mLocale != null) {
    156                     CharSequence localizedText = AccessibilityUtils.getTextForLocale(
    157                             activity, mLocale, R.string.captioning_preview_text);
    158                     mPreviewText.setText(localizedText);
    159                 } else {
    160                     mPreviewText.setText(getResources()
    161                             .getString(R.string.captioning_preview_text));
    162                 }
    163 
    164                 final CaptioningManager.CaptionStyle style = mCaptioningManager.getUserStyle();
    165                 if (style.hasWindowColor()) {
    166                     mPreviewWindow.setBackgroundColor(style.windowColor);
    167                 } else {
    168                     final CaptioningManager.CaptionStyle defStyle =
    169                             CaptioningManager.CaptionStyle.DEFAULT;
    170                     mPreviewWindow.setBackgroundColor(defStyle.windowColor);
    171                 }
    172 
    173                 mPreviewText.invalidate();
    174             } else {
    175                 mPreviewText.setVisibility(View.INVISIBLE);
    176             }
    177         }
    178     }
    179 }
    180