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/*
* Copyright (C) 2015 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.tv.tuner.cc;
import android.content.Context;
import android.util.AttributeSet;
import com.android.tv.tuner.data.nano.Track.AtscCaptionTrack;
import com.android.tv.tuner.layout.ScaledLayout;
/**
* Layout containing the safe title area that helps the closed captions look more prominent. This is
* required by CEA-708B.
*/
public class CaptionLayout extends ScaledLayout {
// The safe title area has 10% margins of the screen.
private static final float SAFE_TITLE_AREA_SCALE_START_X = 0.1f;
private static final float SAFE_TITLE_AREA_SCALE_END_X = 0.9f;
private static final float SAFE_TITLE_AREA_SCALE_START_Y = 0.1f;
private static final float SAFE_TITLE_AREA_SCALE_END_Y = 0.9f;
private final ScaledLayout mSafeTitleAreaLayout;
private AtscCaptionTrack mCaptionTrack;
public CaptionLayout(Context context) {
this(context, null);
}
public CaptionLayout(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public CaptionLayout(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
mSafeTitleAreaLayout = new ScaledLayout(context);
addView(
mSafeTitleAreaLayout,
new ScaledLayoutParams(
SAFE_TITLE_AREA_SCALE_START_X, SAFE_TITLE_AREA_SCALE_END_X,
SAFE_TITLE_AREA_SCALE_START_Y, SAFE_TITLE_AREA_SCALE_END_Y));
}
public void addOrUpdateViewToSafeTitleArea(
CaptionWindowLayout captionWindowLayout, ScaledLayoutParams scaledLayoutParams) {
int index = mSafeTitleAreaLayout.indexOfChild(captionWindowLayout);
if (index < 0) {
mSafeTitleAreaLayout.addView(captionWindowLayout, scaledLayoutParams);
return;
}
mSafeTitleAreaLayout.updateViewLayout(captionWindowLayout, scaledLayoutParams);
}
public void removeViewFromSafeTitleArea(CaptionWindowLayout captionWindowLayout) {
mSafeTitleAreaLayout.removeView(captionWindowLayout);
}
public void setCaptionTrack(AtscCaptionTrack captionTrack) {
mCaptionTrack = captionTrack;
}
public AtscCaptionTrack getCaptionTrack() {
return mCaptionTrack;
}
}
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