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/*
* Copyright (C) 2021 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 androidx.window.extensions.embedding;
import static android.graphics.Matrix.MSCALE_X;
import android.graphics.Rect;
import android.view.Choreographer;
import android.view.RemoteAnimationTarget;
import android.view.SurfaceControl;
import android.view.animation.Animation;
import android.view.animation.Transformation;
import androidx.annotation.NonNull;
/**
* Wrapper to handle the TaskFragment animation update in one {@link SurfaceControl.Transaction}.
*
* The base adapter can be used for {@link RemoteAnimationTarget} that is simple open/close.
*/
class TaskFragmentAnimationAdapter {
final Animation mAnimation;
final RemoteAnimationTarget mTarget;
final SurfaceControl mLeash;
final Transformation mTransformation = new Transformation();
final float[] mMatrix = new float[9];
final float[] mVecs = new float[4];
final Rect mRect = new Rect();
private boolean mIsFirstFrame = true;
TaskFragmentAnimationAdapter(@NonNull Animation animation,
@NonNull RemoteAnimationTarget target) {
this(animation, target, target.leash);
}
/**
* @param leash the surface to animate.
*/
TaskFragmentAnimationAdapter(@NonNull Animation animation,
@NonNull RemoteAnimationTarget target, @NonNull SurfaceControl leash) {
mAnimation = animation;
mTarget = target;
mLeash = leash;
}
/** Called on frame update. */
final void onAnimationUpdate(@NonNull SurfaceControl.Transaction t, long currentPlayTime) {
if (mIsFirstFrame) {
t.show(mLeash);
mIsFirstFrame = false;
}
// Extract the transformation to the current time.
mAnimation.getTransformation(Math.min(currentPlayTime, mAnimation.getDuration()),
mTransformation);
t.setFrameTimelineVsync(Choreographer.getInstance().getVsyncId());
onAnimationUpdateInner(t);
}
/** To be overridden by subclasses to adjust the animation surface change. */
void onAnimationUpdateInner(@NonNull SurfaceControl.Transaction t) {
mTransformation.getMatrix().postTranslate(
mTarget.localBounds.left, mTarget.localBounds.top);
t.setMatrix(mLeash, mTransformation.getMatrix(), mMatrix);
t.setAlpha(mLeash, mTransformation.getAlpha());
// Open/close animation may scale up the surface. Apply an inverse scale to the window crop
// so that it will not be covering other windows.
mVecs[1] = mVecs[2] = 0;
mVecs[0] = mVecs[3] = 1;
mTransformation.getMatrix().mapVectors(mVecs);
mVecs[0] = 1.f / mVecs[0];
mVecs[3] = 1.f / mVecs[3];
final Rect clipRect = mTarget.localBounds;
mRect.left = (int) (clipRect.left * mVecs[0] + 0.5f);
mRect.right = (int) (clipRect.right * mVecs[0] + 0.5f);
mRect.top = (int) (clipRect.top * mVecs[3] + 0.5f);
mRect.bottom = (int) (clipRect.bottom * mVecs[3] + 0.5f);
mRect.offsetTo(Math.round(mTarget.localBounds.width() * (1 - mVecs[0]) / 2.f),
Math.round(mTarget.localBounds.height() * (1 - mVecs[3]) / 2.f));
t.setWindowCrop(mLeash, mRect);
}
/** Called after animation finished. */
final void onAnimationEnd(@NonNull SurfaceControl.Transaction t) {
onAnimationUpdate(t, mAnimation.getDuration());
}
final long getDurationHint() {
return mAnimation.computeDurationHint();
}
/**
* Should be used when the {@link RemoteAnimationTarget} is in split with others, and want to
* animate together as one. This adapter will offset the animation leash to make the animate of
* two windows look like a single window.
*/
static class SplitAdapter extends TaskFragmentAnimationAdapter {
private final boolean mIsLeftHalf;
private final int mWholeAnimationWidth;
/**
* @param isLeftHalf whether this is the left half of the animation.
* @param wholeAnimationWidth the whole animation windows width.
*/
SplitAdapter(@NonNull Animation animation, @NonNull RemoteAnimationTarget target,
boolean isLeftHalf, int wholeAnimationWidth) {
super(animation, target);
mIsLeftHalf = isLeftHalf;
mWholeAnimationWidth = wholeAnimationWidth;
if (wholeAnimationWidth == 0) {
throw new IllegalArgumentException("SplitAdapter must provide wholeAnimationWidth");
}
}
@Override
void onAnimationUpdateInner(@NonNull SurfaceControl.Transaction t) {
float posX = mTarget.localBounds.left;
final float posY = mTarget.localBounds.top;
// This window is half of the whole animation window. Offset left/right to make it
// look as one with the other half.
mTransformation.getMatrix().getValues(mMatrix);
final int targetWidth = mTarget.localBounds.width();
final float scaleX = mMatrix[MSCALE_X];
final float totalOffset = mWholeAnimationWidth * (1 - scaleX) / 2;
final float curOffset = targetWidth * (1 - scaleX) / 2;
final float offsetDiff = totalOffset - curOffset;
if (mIsLeftHalf) {
posX += offsetDiff;
} else {
posX -= offsetDiff;
}
mTransformation.getMatrix().postTranslate(posX, posY);
t.setMatrix(mLeash, mTransformation.getMatrix(), mMatrix);
t.setAlpha(mLeash, mTransformation.getAlpha());
}
}
/**
* Should be used for the animation of the snapshot of a {@link RemoteAnimationTarget} that has
* size change.
*/
static class SnapshotAdapter extends TaskFragmentAnimationAdapter {
SnapshotAdapter(@NonNull Animation animation, @NonNull RemoteAnimationTarget target) {
// Start leash is the snapshot of the starting surface.
super(animation, target, target.startLeash);
}
@Override
void onAnimationUpdateInner(@NonNull SurfaceControl.Transaction t) {
// Snapshot should always be placed at the top left of the animation leash.
mTransformation.getMatrix().postTranslate(0, 0);
t.setMatrix(mLeash, mTransformation.getMatrix(), mMatrix);
t.setAlpha(mLeash, mTransformation.getAlpha());
}
}
/**
* Should be used for the animation of the {@link RemoteAnimationTarget} that has size change.
*/
static class BoundsChangeAdapter extends TaskFragmentAnimationAdapter {
BoundsChangeAdapter(@NonNull Animation animation, @NonNull RemoteAnimationTarget target) {
super(animation, target);
}
@Override
void onAnimationUpdateInner(@NonNull SurfaceControl.Transaction t) {
mTransformation.getMatrix().postTranslate(
mTarget.localBounds.left, mTarget.localBounds.top);
t.setMatrix(mLeash, mTransformation.getMatrix(), mMatrix);
t.setAlpha(mLeash, mTransformation.getAlpha());
// The following applies an inverse scale to the clip-rect so that it crops "after" the
// scale instead of before.
mVecs[1] = mVecs[2] = 0;
mVecs[0] = mVecs[3] = 1;
mTransformation.getMatrix().mapVectors(mVecs);
mVecs[0] = 1.f / mVecs[0];
mVecs[3] = 1.f / mVecs[3];
final Rect clipRect = mTransformation.getClipRect();
mRect.left = (int) (clipRect.left * mVecs[0] + 0.5f);
mRect.right = (int) (clipRect.right * mVecs[0] + 0.5f);
mRect.top = (int) (clipRect.top * mVecs[3] + 0.5f);
mRect.bottom = (int) (clipRect.bottom * mVecs[3] + 0.5f);
t.setWindowCrop(mLeash, mRect);
}
}
}
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