FloatNodes.java
/*
* Copyright 2022 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.wear.protolayout.expression.pipeline;
import static androidx.wear.protolayout.expression.pipeline.AnimationsHelper.applyAnimationSpecToAnimator;
import android.animation.ValueAnimator;
import android.util.Log;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.annotation.UiThread;
import androidx.wear.protolayout.expression.proto.AnimationParameterProto.AnimationSpec;
import androidx.wear.protolayout.expression.proto.DynamicProto.AnimatableFixedFloat;
import androidx.wear.protolayout.expression.proto.DynamicProto.ArithmeticFloatOp;
import androidx.wear.protolayout.expression.proto.FixedProto.FixedFloat;
/** Dynamic data nodes which yield floats. */
class FloatNodes {
private FloatNodes() {}
/** Dynamic float node that has a fixed value. */
static class FixedFloatNode implements DynamicDataSourceNode<Float> {
private final float mValue;
private final DynamicTypeValueReceiver<Float> mDownstream;
FixedFloatNode(FixedFloat protoNode, DynamicTypeValueReceiver<Float> downstream) {
this.mValue = protoNode.getValue();
this.mDownstream = downstream;
}
@Override
@UiThread
public void preInit() {
mDownstream.onPreUpdate();
}
@Override
@UiThread
public void init() {
mDownstream.onData(mValue);
}
@Override
@UiThread
public void destroy() {}
}
/** Dynamic float node that gets value from the state. */
static class StateFloatNode extends StateSourceNode<Float> {
StateFloatNode(
ObservableStateStore observableStateStore,
String bindKey,
DynamicTypeValueReceiver<Float> downstream) {
super(observableStateStore, bindKey, se -> se.getFloatVal().getValue(), downstream);
}
}
/** Dynamic float node that supports arithmetic operations. */
static class ArithmeticFloatNode extends DynamicDataBiTransformNode<Float, Float, Float> {
private static final String TAG = "ArithmeticFloatNode";
ArithmeticFloatNode(
ArithmeticFloatOp protoNode, DynamicTypeValueReceiver<Float> downstream) {
super(
downstream,
(lhs, rhs) -> {
try {
switch (protoNode.getOperationType()) {
case ARITHMETIC_OP_TYPE_UNDEFINED:
case UNRECOGNIZED:
Log.e(TAG, "Unknown operation type in ArithmeticFloatNode");
return Float.NaN;
case ARITHMETIC_OP_TYPE_ADD:
return lhs + rhs;
case ARITHMETIC_OP_TYPE_SUBTRACT:
return lhs - rhs;
case ARITHMETIC_OP_TYPE_MULTIPLY:
return lhs * rhs;
case ARITHMETIC_OP_TYPE_DIVIDE:
return lhs / rhs;
case ARITHMETIC_OP_TYPE_MODULO:
return lhs % rhs;
}
} catch (ArithmeticException ex) {
Log.e(TAG, "ArithmeticException in ArithmeticFloatNode", ex);
return Float.NaN;
}
Log.e(TAG, "Unknown operation type in ArithmeticFloatNode");
return Float.NaN;
});
}
}
/** Dynamic float node that gets value from INTEGER. */
static class Int32ToFloatNode extends DynamicDataTransformNode<Integer, Float> {
Int32ToFloatNode(DynamicTypeValueReceiver<Float> downstream) {
super(downstream, i -> (float) i);
}
}
/** Dynamic float node that gets animatable value from fixed source. */
static class AnimatableFixedFloatNode extends AnimatableNode
implements DynamicDataSourceNode<Float> {
private final AnimatableFixedFloat mProtoNode;
private final DynamicTypeValueReceiver<Float> mDownstream;
AnimatableFixedFloatNode(
AnimatableFixedFloat protoNode,
DynamicTypeValueReceiver<Float> downstream,
QuotaManager quotaManager) {
super(quotaManager);
this.mProtoNode = protoNode;
this.mDownstream = downstream;
}
@Override
@UiThread
public void preInit() {
mDownstream.onPreUpdate();
}
@Override
@UiThread
public void init() {
ValueAnimator animator =
ValueAnimator.ofFloat(mProtoNode.getFromValue(), mProtoNode.getToValue());
animator.addUpdateListener(a -> mDownstream.onData((float) a.getAnimatedValue()));
applyAnimationSpecToAnimator(animator, mProtoNode.getSpec());
mQuotaAwareAnimator.updateAnimator(animator);
startOrSkipAnimator();
}
@Override
@UiThread
public void destroy() {
mQuotaAwareAnimator.stopAnimator();
}
}
/** Dynamic float node that gets animatable value from dynamic source. */
static class DynamicAnimatedFloatNode extends AnimatableNode implements DynamicDataNode<Float> {
final DynamicTypeValueReceiver<Float> mDownstream;
private final DynamicTypeValueReceiver<Float> mInputCallback;
@Nullable Float mCurrentValue = null;
int mPendingCalls = 0;
// Static analysis complains about calling methods of parent class AnimatableNode under
// initialization but mInputCallback is only used after the constructor is finished.
@SuppressWarnings("method.invocation.invalid")
DynamicAnimatedFloatNode(
DynamicTypeValueReceiver<Float> downstream,
@NonNull AnimationSpec spec,
QuotaManager quotaManager) {
super(quotaManager);
this.mDownstream = downstream;
this.mInputCallback =
new DynamicTypeValueReceiver<Float>() {
@Override
public void onPreUpdate() {
mPendingCalls++;
if (mPendingCalls == 1) {
mDownstream.onPreUpdate();
mQuotaAwareAnimator.resetAnimator();
}
}
@Override
public void onData(@NonNull Float newData) {
if (mPendingCalls > 0) {
mPendingCalls--;
}
if (mPendingCalls == 0) {
if (mCurrentValue == null) {
mCurrentValue = newData;
mDownstream.onData(mCurrentValue);
} else {
ValueAnimator animator =
ValueAnimator.ofFloat(mCurrentValue, newData);
applyAnimationSpecToAnimator(animator, spec);
animator.addUpdateListener(
a -> {
if (mPendingCalls == 0) {
mCurrentValue = (float) a.getAnimatedValue();
mDownstream.onData(mCurrentValue);
}
});
mQuotaAwareAnimator.updateAnimator(animator);
startOrSkipAnimator();
}
}
}
@Override
public void onInvalidated() {
if (mPendingCalls > 0) {
mPendingCalls--;
}
if (mPendingCalls == 0) {
mCurrentValue = null;
mDownstream.onInvalidated();
}
}
};
}
public DynamicTypeValueReceiver<Float> getInputCallback() {
return mInputCallback;
}
}
}