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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 com.android.launcher3.taskbar;
import android.animation.Animator;
import android.animation.AnimatorListenerAdapter;
import android.animation.ValueAnimator;
import android.content.SharedPreferences;
import android.content.res.Resources;
import android.graphics.Outline;
import android.graphics.Rect;
import android.view.View;
import android.view.ViewOutlineProvider;
import com.android.launcher3.R;
import com.android.launcher3.Utilities;
import com.android.launcher3.anim.RevealOutlineAnimation;
import com.android.launcher3.anim.RoundedRectRevealOutlineProvider;
import com.android.launcher3.util.Executors;
import com.android.launcher3.util.MultiValueAlpha;
import com.android.quickstep.AnimatedFloat;
import com.android.systemui.shared.navigationbar.RegionSamplingHelper;
/**
* Handles properties/data collection, then passes the results to our stashed handle View to render.
*/
public class StashedHandleViewController {
public static final int ALPHA_INDEX_STASHED = 0;
public static final int ALPHA_INDEX_HOME_DISABLED = 1;
private static final int NUM_ALPHA_CHANNELS = 2;
/**
* The SharedPreferences key for whether the stashed handle region is dark.
*/
private static final String SHARED_PREFS_STASHED_HANDLE_REGION_DARK_KEY =
"stashed_handle_region_is_dark";
private final TaskbarActivityContext mActivity;
private final SharedPreferences mPrefs;
private final StashedHandleView mStashedHandleView;
private final int mStashedHandleWidth;
private final int mStashedHandleHeight;
private final RegionSamplingHelper mRegionSamplingHelper;
private final MultiValueAlpha mTaskbarStashedHandleAlpha;
private final AnimatedFloat mTaskbarStashedHandleHintScale = new AnimatedFloat(
this::updateStashedHandleHintScale);
// Initialized in init.
private TaskbarControllers mControllers;
// The bounds we want to clip to in the settled state when showing the stashed handle.
private final Rect mStashedHandleBounds = new Rect();
private float mStashedHandleRadius;
// When the reveal animation is cancelled, we can assume it's about to create a new animation,
// which should start off at the same point the cancelled one left off.
private float mStartProgressForNextRevealAnim;
private boolean mWasLastRevealAnimReversed;
public StashedHandleViewController(TaskbarActivityContext activity,
StashedHandleView stashedHandleView) {
mActivity = activity;
mPrefs = Utilities.getPrefs(mActivity);
mStashedHandleView = stashedHandleView;
mTaskbarStashedHandleAlpha = new MultiValueAlpha(mStashedHandleView, NUM_ALPHA_CHANNELS);
mTaskbarStashedHandleAlpha.setUpdateVisibility(true);
mStashedHandleView.updateHandleColor(
mPrefs.getBoolean(SHARED_PREFS_STASHED_HANDLE_REGION_DARK_KEY, false),
false /* animate */);
final Resources resources = mActivity.getResources();
mStashedHandleWidth = resources.getDimensionPixelSize(R.dimen.taskbar_stashed_handle_width);
mStashedHandleHeight = resources.getDimensionPixelSize(
R.dimen.taskbar_stashed_handle_height);
mRegionSamplingHelper = new RegionSamplingHelper(mStashedHandleView,
new RegionSamplingHelper.SamplingCallback() {
@Override
public void onRegionDarknessChanged(boolean isRegionDark) {
mStashedHandleView.updateHandleColor(isRegionDark, true /* animate */);
mPrefs.edit().putBoolean(SHARED_PREFS_STASHED_HANDLE_REGION_DARK_KEY,
isRegionDark).apply();
}
@Override
public Rect getSampledRegion(View sampledView) {
return mStashedHandleView.getSampledRegion();
}
}, Executors.UI_HELPER_EXECUTOR);
}
public void init(TaskbarControllers controllers) {
mControllers = controllers;
mStashedHandleView.getLayoutParams().height = mActivity.getDeviceProfile().taskbarSize;
mTaskbarStashedHandleAlpha.getProperty(ALPHA_INDEX_STASHED).setValue(0);
mTaskbarStashedHandleHintScale.updateValue(1f);
final int stashedTaskbarHeight = mControllers.taskbarStashController.getStashedHeight();
mStashedHandleView.setOutlineProvider(new ViewOutlineProvider() {
@Override
public void getOutline(View view, Outline outline) {
final int stashedCenterX = view.getWidth() / 2;
final int stashedCenterY = view.getHeight() - stashedTaskbarHeight / 2;
mStashedHandleBounds.set(
stashedCenterX - mStashedHandleWidth / 2,
stashedCenterY - mStashedHandleHeight / 2,
stashedCenterX + mStashedHandleWidth / 2,
stashedCenterY + mStashedHandleHeight / 2);
mStashedHandleView.updateSampledRegion(mStashedHandleBounds);
mStashedHandleRadius = view.getHeight() / 2f;
outline.setRoundRect(mStashedHandleBounds, mStashedHandleRadius);
}
});
mStashedHandleView.addOnLayoutChangeListener((view, i, i1, i2, i3, i4, i5, i6, i7) -> {
final int stashedCenterX = view.getWidth() / 2;
final int stashedCenterY = view.getHeight() - stashedTaskbarHeight / 2;
view.setPivotX(stashedCenterX);
view.setPivotY(stashedCenterY);
});
}
public void onDestroy() {
mRegionSamplingHelper.stopAndDestroy();
}
public MultiValueAlpha getStashedHandleAlpha() {
return mTaskbarStashedHandleAlpha;
}
public AnimatedFloat getStashedHandleHintScale() {
return mTaskbarStashedHandleHintScale;
}
/**
* Creates and returns a {@link RevealOutlineAnimation} Animator that updates the stashed handle
* shape and size. When stashed, the shape is a thin rounded pill. When unstashed, the shape
* morphs into the size of where the taskbar icons will be.
*/
public Animator createRevealAnimToIsStashed(boolean isStashed) {
final RevealOutlineAnimation handleRevealProvider = new RoundedRectRevealOutlineProvider(
mStashedHandleRadius, mStashedHandleRadius,
mControllers.taskbarViewController.getIconLayoutBounds(), mStashedHandleBounds);
boolean isReversed = !isStashed;
boolean changingDirection = mWasLastRevealAnimReversed != isReversed;
mWasLastRevealAnimReversed = isReversed;
if (changingDirection) {
mStartProgressForNextRevealAnim = 1f - mStartProgressForNextRevealAnim;
}
ValueAnimator revealAnim = handleRevealProvider.createRevealAnimator(mStashedHandleView,
isReversed, mStartProgressForNextRevealAnim);
revealAnim.addListener(new AnimatorListenerAdapter() {
@Override
public void onAnimationEnd(Animator animation) {
mStartProgressForNextRevealAnim = ((ValueAnimator) animation).getAnimatedFraction();
}
});
return revealAnim;
}
public void onIsStashed(boolean isStashed) {
mRegionSamplingHelper.setWindowVisible(isStashed);
if (isStashed) {
mStashedHandleView.updateSampledRegion(mStashedHandleBounds);
mRegionSamplingHelper.start(mStashedHandleView.getSampledRegion());
} else {
mRegionSamplingHelper.stop();
}
}
protected void updateStashedHandleHintScale() {
mStashedHandleView.setScaleX(mTaskbarStashedHandleHintScale.value);
mStashedHandleView.setScaleY(mTaskbarStashedHandleHintScale.value);
}
/**
* Should be called when the home button is disabled, so we can hide this handle as well.
*/
public void setIsHomeButtonDisabled(boolean homeDisabled) {
mTaskbarStashedHandleAlpha.getProperty(ALPHA_INDEX_HOME_DISABLED).setValue(
homeDisabled ? 0 : 1);
}
public boolean isStashedHandleVisible() {
return mStashedHandleView.getVisibility() == View.VISIBLE;
}
}
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