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/*
* Copyright 2018 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.widget;
import android.content.Context;
import android.graphics.Canvas;
import android.media.SubtitleController.Anchor;
import android.media.SubtitleTrack.RenderingWidget;
import android.os.Looper;
import android.support.annotation.Nullable;
import android.util.AttributeSet;
import android.widget.FrameLayout;
class SubtitleView extends FrameLayout implements Anchor {
private static final String TAG = "SubtitleView";
private RenderingWidget mSubtitleWidget;
private RenderingWidget.OnChangedListener mSubtitlesChangedListener;
public SubtitleView(Context context) {
this(context, null);
}
public SubtitleView(Context context, @Nullable AttributeSet attrs) {
this(context, attrs, 0);
}
public SubtitleView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
this(context, attrs, defStyleAttr, 0);
}
public SubtitleView(
Context context, @Nullable AttributeSet attrs, int defStyleAttr, int defStyleRes) {
super(context, attrs, defStyleAttr, defStyleRes);
}
@Override
public void setSubtitleWidget(RenderingWidget subtitleWidget) {
if (mSubtitleWidget == subtitleWidget) {
return;
}
final boolean attachedToWindow = isAttachedToWindow();
if (mSubtitleWidget != null) {
if (attachedToWindow) {
mSubtitleWidget.onDetachedFromWindow();
}
mSubtitleWidget.setOnChangedListener(null);
}
mSubtitleWidget = subtitleWidget;
if (subtitleWidget != null) {
if (mSubtitlesChangedListener == null) {
mSubtitlesChangedListener = new RenderingWidget.OnChangedListener() {
@Override
public void onChanged(RenderingWidget renderingWidget) {
invalidate();
}
};
}
setWillNotDraw(false);
subtitleWidget.setOnChangedListener(mSubtitlesChangedListener);
if (attachedToWindow) {
subtitleWidget.onAttachedToWindow();
requestLayout();
}
} else {
setWillNotDraw(true);
}
invalidate();
}
@Override
public Looper getSubtitleLooper() {
return Looper.getMainLooper();
}
@Override
public void onAttachedToWindow() {
super.onAttachedToWindow();
if (mSubtitleWidget != null) {
mSubtitleWidget.onAttachedToWindow();
}
}
@Override
public void onDetachedFromWindow() {
super.onDetachedFromWindow();
if (mSubtitleWidget != null) {
mSubtitleWidget.onDetachedFromWindow();
}
}
@Override
public void onLayout(boolean changed, int left, int top, int right, int bottom) {
super.onLayout(changed, left, top, right, bottom);
if (mSubtitleWidget != null) {
final int width = getWidth() - getPaddingLeft() - getPaddingRight();
final int height = getHeight() - getPaddingTop() - getPaddingBottom();
mSubtitleWidget.setSize(width, height);
}
}
@Override
public void draw(Canvas canvas) {
super.draw(canvas);
if (mSubtitleWidget != null) {
final int saveCount = canvas.save();
canvas.translate(getPaddingLeft(), getPaddingTop());
mSubtitleWidget.draw(canvas);
canvas.restoreToCount(saveCount);
}
}
@Override
public CharSequence getAccessibilityClassName() {
return SubtitleView.class.getName();
}
}
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