1 /* 2 * Copyright (C) 2015 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.tuner.cc; 18 19 import android.content.Context; 20 import android.util.AttributeSet; 21 import com.android.tv.tuner.data.Track.AtscCaptionTrack; 22 import com.android.tv.tuner.layout.ScaledLayout; 23 24 /** 25 * Layout containing the safe title area that helps the closed captions look more prominent. This is 26 * required by CEA-708B. 27 */ 28 public class CaptionLayout extends ScaledLayout { 29 // The safe title area has 10% margins of the screen. 30 private static final float SAFE_TITLE_AREA_SCALE_START_X = 0.1f; 31 private static final float SAFE_TITLE_AREA_SCALE_END_X = 0.9f; 32 private static final float SAFE_TITLE_AREA_SCALE_START_Y = 0.1f; 33 private static final float SAFE_TITLE_AREA_SCALE_END_Y = 0.9f; 34 35 private final ScaledLayout mSafeTitleAreaLayout; 36 private AtscCaptionTrack mCaptionTrack; 37 CaptionLayout(Context context)38 public CaptionLayout(Context context) { 39 this(context, null); 40 } 41 CaptionLayout(Context context, AttributeSet attrs)42 public CaptionLayout(Context context, AttributeSet attrs) { 43 this(context, attrs, 0); 44 } 45 CaptionLayout(Context context, AttributeSet attrs, int defStyleAttr)46 public CaptionLayout(Context context, AttributeSet attrs, int defStyleAttr) { 47 super(context, attrs, defStyleAttr); 48 mSafeTitleAreaLayout = new ScaledLayout(context); 49 addView( 50 mSafeTitleAreaLayout, 51 new ScaledLayoutParams( 52 SAFE_TITLE_AREA_SCALE_START_X, SAFE_TITLE_AREA_SCALE_END_X, 53 SAFE_TITLE_AREA_SCALE_START_Y, SAFE_TITLE_AREA_SCALE_END_Y)); 54 } 55 addOrUpdateViewToSafeTitleArea( CaptionWindowLayout captionWindowLayout, ScaledLayoutParams scaledLayoutParams)56 public void addOrUpdateViewToSafeTitleArea( 57 CaptionWindowLayout captionWindowLayout, ScaledLayoutParams scaledLayoutParams) { 58 int index = mSafeTitleAreaLayout.indexOfChild(captionWindowLayout); 59 if (index < 0) { 60 mSafeTitleAreaLayout.addView(captionWindowLayout, scaledLayoutParams); 61 return; 62 } 63 mSafeTitleAreaLayout.updateViewLayout(captionWindowLayout, scaledLayoutParams); 64 } 65 removeViewFromSafeTitleArea(CaptionWindowLayout captionWindowLayout)66 public void removeViewFromSafeTitleArea(CaptionWindowLayout captionWindowLayout) { 67 mSafeTitleAreaLayout.removeView(captionWindowLayout); 68 } 69 setCaptionTrack(AtscCaptionTrack captionTrack)70 public void setCaptionTrack(AtscCaptionTrack captionTrack) { 71 mCaptionTrack = captionTrack; 72 } 73 getCaptionTrack()74 public AtscCaptionTrack getCaptionTrack() { 75 return mCaptionTrack; 76 } 77 } 78