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/*
* Copyright (C) 2023 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.customization.picker.clock.ui.view
import android.content.Context
import android.content.res.ColorStateList
import android.content.res.Resources
import android.util.AttributeSet
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import android.widget.FrameLayout
import androidx.constraintlayout.helper.widget.Carousel
import androidx.constraintlayout.motion.widget.MotionLayout
import androidx.constraintlayout.widget.ConstraintSet
import androidx.core.view.doOnPreDraw
import androidx.core.view.get
import androidx.core.view.isNotEmpty
import com.android.customization.picker.clock.shared.ClockSize
import com.android.customization.picker.clock.ui.viewmodel.ClockCarouselItemViewModel
import com.android.systemui.plugins.ClockController
import com.android.wallpaper.R
import com.android.wallpaper.picker.FixedWidthDisplayRatioFrameLayout
import java.lang.Float.max
class ClockCarouselView(
context: Context,
attrs: AttributeSet,
) :
FrameLayout(
context,
attrs,
) {
val carousel: Carousel
private val motionLayout: MotionLayout
private lateinit var adapter: ClockCarouselAdapter
private lateinit var clockViewFactory: ClockViewFactory
private var toCenterClockController: ClockController? = null
private var offCenterClockController: ClockController? = null
private var toCenterClockScaleView: View? = null
private var offCenterClockScaleView: View? = null
private var toCenterClockHostView: ClockHostView? = null
private var offCenterClockHostView: ClockHostView? = null
private var toCenterCardView: View? = null
private var offCenterCardView: View? = null
init {
val clockCarousel = LayoutInflater.from(context).inflate(R.layout.clock_carousel, this)
carousel = clockCarousel.requireViewById(R.id.carousel)
motionLayout = clockCarousel.requireViewById(R.id.motion_container)
motionLayout.contentDescription = context.getString(R.string.custom_clocks_label)
}
/**
* Make sure to set [clockViewFactory] before calling any functions from [ClockCarouselView].
*/
fun setClockViewFactory(factory: ClockViewFactory) {
clockViewFactory = factory
}
// This function is for the custom accessibility action to trigger a transition to the next
// carousel item. If the current item is the last item in the carousel, the next item
// will be the first item.
fun transitionToNext() {
if (carousel.count != 0) {
val index = (carousel.currentIndex + 1) % carousel.count
carousel.jumpToIndex(index)
// Explicitly called this since using transitionToIndex(index) leads to
// race-condition between announcement of content description of the correct clock-face
// and the selection of clock face itself
adapter.onNewItem(index)
}
}
// This function is for the custom accessibility action to trigger a transition to
// the previous carousel item. If the current item is the first item in the carousel,
// the previous item will be the last item.
fun transitionToPrevious() {
if (carousel.count != 0) {
val index = (carousel.currentIndex + carousel.count - 1) % carousel.count
carousel.jumpToIndex(index)
// Explicitly called this since using transitionToIndex(index) leads to
// race-condition between announcement of content description of the correct clock-face
// and the selection of clock face itself
adapter.onNewItem(index)
}
}
fun scrollToNext() {
if (
carousel.count <= 1 ||
(!carousel.isInfinite && carousel.currentIndex == carousel.count - 1)
) {
// No need to scroll if the count is equal or less than 1
return
}
if (motionLayout.currentState == R.id.start) {
motionLayout.transitionToState(R.id.next, TRANSITION_DURATION)
}
}
fun scrollToPrevious() {
if (carousel.count <= 1 || (!carousel.isInfinite && carousel.currentIndex == 0)) {
// No need to scroll if the count is equal or less than 1
return
}
if (motionLayout.currentState == R.id.start) {
motionLayout.transitionToState(R.id.previous, TRANSITION_DURATION)
}
}
fun getContentDescription(index: Int): String {
return adapter.getContentDescription(index, resources)
}
fun setUpClockCarouselView(
clockSize: ClockSize,
clocks: List<ClockCarouselItemViewModel>,
onClockSelected: (clock: ClockCarouselItemViewModel) -> Unit,
isTwoPaneAndSmallWidth: Boolean,
) {
if (isTwoPaneAndSmallWidth) {
overrideScreenPreviewWidth()
}
adapter = ClockCarouselAdapter(clockSize, clocks, clockViewFactory, onClockSelected)
carousel.isInfinite = clocks.size >= MIN_CLOCKS_TO_ENABLE_INFINITE_CAROUSEL
carousel.setAdapter(adapter)
val indexOfSelectedClock =
clocks
.indexOfFirst { it.isSelected }
// If not found, default to the first clock as selected:
.takeIf { it != -1 }
?: 0
carousel.jumpToIndex(indexOfSelectedClock)
motionLayout.setTransitionListener(
object : MotionLayout.TransitionListener {
override fun onTransitionStarted(
motionLayout: MotionLayout?,
startId: Int,
endId: Int
) {
if (motionLayout == null) {
return
}
when (clockSize) {
ClockSize.DYNAMIC -> prepareDynamicClockView(motionLayout, endId)
ClockSize.SMALL -> prepareSmallClockView(motionLayout, endId)
}
prepareCardView(motionLayout, endId)
setCarouselItemAnimationState(true)
}
override fun onTransitionChange(
motionLayout: MotionLayout?,
startId: Int,
endId: Int,
progress: Float,
) {
when (clockSize) {
ClockSize.DYNAMIC -> onDynamicClockViewTransition(progress)
ClockSize.SMALL -> onSmallClockViewTransition(progress)
}
onCardViewTransition(progress)
}
override fun onTransitionCompleted(motionLayout: MotionLayout?, currentId: Int) {
setCarouselItemAnimationState(currentId == R.id.start)
}
private fun prepareDynamicClockView(motionLayout: MotionLayout, endId: Int) {
val scalingDownClockId = adapter.clocks[carousel.currentIndex].clockId
val scalingUpIdx =
if (endId == R.id.next) (carousel.currentIndex + 1) % adapter.count()
else (carousel.currentIndex - 1 + adapter.count()) % adapter.count()
val scalingUpClockId = adapter.clocks[scalingUpIdx].clockId
offCenterClockController = clockViewFactory.getController(scalingDownClockId)
toCenterClockController = clockViewFactory.getController(scalingUpClockId)
offCenterClockScaleView = motionLayout.findViewById(R.id.clock_scale_view_2)
toCenterClockScaleView =
motionLayout.findViewById(
if (endId == R.id.next) R.id.clock_scale_view_3
else R.id.clock_scale_view_1
)
}
private fun prepareSmallClockView(motionLayout: MotionLayout, endId: Int) {
offCenterClockHostView = motionLayout.findViewById(R.id.clock_host_view_2)
toCenterClockHostView =
motionLayout.findViewById(
if (endId == R.id.next) R.id.clock_host_view_3
else R.id.clock_host_view_1
)
}
private fun prepareCardView(motionLayout: MotionLayout, endId: Int) {
offCenterCardView = motionLayout.findViewById(R.id.item_card_2)
toCenterCardView =
motionLayout.findViewById(
if (endId == R.id.next) R.id.item_card_3 else R.id.item_card_1
)
}
private fun onCardViewTransition(progress: Float) {
offCenterCardView?.alpha = getShowingAlpha(progress)
toCenterCardView?.alpha = getHidingAlpha(progress)
}
private fun onDynamicClockViewTransition(progress: Float) {
offCenterClockController
?.largeClock
?.animations
?.onPickerCarouselSwiping(1 - progress)
toCenterClockController
?.largeClock
?.animations
?.onPickerCarouselSwiping(progress)
val scalingDownScale = getScalingDownScale(progress)
val scalingUpScale = getScalingUpScale(progress)
offCenterClockScaleView?.scaleX = scalingDownScale
offCenterClockScaleView?.scaleY = scalingDownScale
toCenterClockScaleView?.scaleX = scalingUpScale
toCenterClockScaleView?.scaleY = scalingUpScale
}
private fun onSmallClockViewTransition(progress: Float) {
val offCenterClockHostView = offCenterClockHostView ?: return
val toCenterClockHostView = toCenterClockHostView ?: return
val offCenterClockFrame =
if (offCenterClockHostView.isNotEmpty()) {
offCenterClockHostView[0]
} else {
null
}
?: return
val toCenterClockFrame =
if (toCenterClockHostView.isNotEmpty()) {
toCenterClockHostView[0]
} else {
null
}
?: return
offCenterClockHostView.doOnPreDraw {
it.pivotX =
progress * it.width / 2 + (1 - progress) * getCenteredHostViewPivotX(it)
it.pivotY = progress * it.height / 2
}
toCenterClockHostView.doOnPreDraw {
it.pivotX =
(1 - progress) * it.width / 2 + progress * getCenteredHostViewPivotX(it)
it.pivotY = (1 - progress) * it.height / 2
}
offCenterClockFrame.translationX =
getTranslationDistance(
offCenterClockHostView.width,
offCenterClockFrame.width,
offCenterClockFrame.left,
) * progress
offCenterClockFrame.translationY =
getTranslationDistance(
offCenterClockHostView.height,
offCenterClockFrame.height,
offCenterClockFrame.top,
) * progress
toCenterClockFrame.translationX =
getTranslationDistance(
toCenterClockHostView.width,
toCenterClockFrame.width,
toCenterClockFrame.left,
) * (1 - progress)
toCenterClockFrame.translationY =
getTranslationDistance(
toCenterClockHostView.height,
toCenterClockFrame.height,
toCenterClockFrame.top,
) * (1 - progress)
}
private fun setCarouselItemAnimationState(isStart: Boolean) {
when (clockSize) {
ClockSize.DYNAMIC -> onDynamicClockViewTransition(if (isStart) 0f else 1f)
ClockSize.SMALL -> onSmallClockViewTransition(if (isStart) 0f else 1f)
}
onCardViewTransition(if (isStart) 0f else 1f)
}
override fun onTransitionTrigger(
motionLayout: MotionLayout?,
triggerId: Int,
positive: Boolean,
progress: Float
) {}
}
)
}
fun setSelectedClockIndex(
index: Int,
) {
// 1. setUpClockCarouselView() can possibly not be called before setSelectedClockIndex().
// We need to check if index out of bound.
// 2. jumpToIndex() to the same position can cause the views unnecessarily populate again.
// We only call jumpToIndex when the index is different from the current carousel.
if (index < carousel.count && index != carousel.currentIndex) {
carousel.jumpToIndex(index)
}
}
fun setCarouselCardColor(color: Int) {
itemViewIds.forEach { id ->
val cardViewId = getClockCardViewId(id)
cardViewId?.let {
val cardView = motionLayout.requireViewById<View>(it)
cardView.backgroundTintList = ColorStateList.valueOf(color)
}
}
}
private fun overrideScreenPreviewWidth() {
val overrideWidth =
context.resources.getDimensionPixelSize(
R.dimen.screen_preview_width_for_2_pane_small_width
)
itemViewIds.forEach { id ->
val itemView = motionLayout.requireViewById<FrameLayout>(id)
val itemViewLp = itemView.layoutParams
itemViewLp.width = overrideWidth
itemView.layoutParams = itemViewLp
getClockScaleViewId(id)?.let {
val scaleView = motionLayout.requireViewById<FixedWidthDisplayRatioFrameLayout>(it)
val scaleViewLp = scaleView.layoutParams
scaleViewLp.width = overrideWidth
scaleView.layoutParams = scaleViewLp
}
}
val previousConstaintSet = motionLayout.getConstraintSet(R.id.previous)
val startConstaintSet = motionLayout.getConstraintSet(R.id.start)
val nextConstaintSet = motionLayout.getConstraintSet(R.id.next)
val constaintSetList =
listOf<ConstraintSet>(previousConstaintSet, startConstaintSet, nextConstaintSet)
constaintSetList.forEach { constraintSet ->
itemViewIds.forEach { id ->
constraintSet.getConstraint(id)?.let { constraint ->
val layout = constraint.layout
if (
constraint.layout.mWidth ==
context.resources.getDimensionPixelSize(R.dimen.screen_preview_width)
) {
layout.mWidth = overrideWidth
}
if (
constraint.layout.widthMax ==
context.resources.getDimensionPixelSize(R.dimen.screen_preview_width)
) {
layout.widthMax = overrideWidth
}
}
}
}
}
private class ClockCarouselAdapter(
val clockSize: ClockSize,
val clocks: List<ClockCarouselItemViewModel>,
private val clockViewFactory: ClockViewFactory,
private val onClockSelected: (clock: ClockCarouselItemViewModel) -> Unit
) : Carousel.Adapter {
fun getContentDescription(index: Int, resources: Resources): String {
return clocks[index].getContentDescription(resources)
}
override fun count(): Int {
return clocks.size
}
override fun populate(view: View?, index: Int) {
val viewRoot = view as? ViewGroup ?: return
val cardView =
getClockCardViewId(viewRoot.id)?.let { viewRoot.findViewById(it) as? View }
?: return
val clockScaleView =
getClockScaleViewId(viewRoot.id)?.let { viewRoot.findViewById(it) as? View }
?: return
val clockHostView =
getClockHostViewId(viewRoot.id)?.let { viewRoot.findViewById(it) as? ClockHostView }
?: return
val clockId = clocks[index].clockId
// Add the clock view to the cloc host view
clockHostView.removeAllViews()
val clockView =
when (clockSize) {
ClockSize.DYNAMIC -> clockViewFactory.getLargeView(clockId)
ClockSize.SMALL -> clockViewFactory.getSmallView(clockId)
}
// The clock view might still be attached to an existing parent. Detach before adding to
// another parent.
(clockView.parent as? ViewGroup)?.removeView(clockView)
clockHostView.addView(clockView)
val isMiddleView = isMiddleView(viewRoot.id)
// Accessibility
viewRoot.contentDescription = getContentDescription(index, view.resources)
viewRoot.isSelected = isMiddleView
when (clockSize) {
ClockSize.DYNAMIC ->
initializeDynamicClockView(
isMiddleView,
clockScaleView,
clockId,
clockHostView,
)
ClockSize.SMALL ->
initializeSmallClockView(
isMiddleView,
clockHostView,
clockView,
)
}
cardView.alpha = if (isMiddleView) 0f else 1f
}
private fun initializeDynamicClockView(
isMiddleView: Boolean,
clockScaleView: View,
clockId: String,
clockHostView: ClockHostView,
) {
clockHostView.doOnPreDraw {
it.pivotX = it.width / 2F
it.pivotY = it.height / 2F
}
if (isMiddleView) {
clockScaleView.scaleX = 1f
clockScaleView.scaleY = 1f
clockViewFactory
.getController(clockId)
.largeClock
.animations
.onPickerCarouselSwiping(1F)
} else {
clockScaleView.scaleX = CLOCK_CAROUSEL_VIEW_SCALE
clockScaleView.scaleY = CLOCK_CAROUSEL_VIEW_SCALE
clockViewFactory
.getController(clockId)
.largeClock
.animations
.onPickerCarouselSwiping(0F)
}
}
private fun initializeSmallClockView(
isMiddleView: Boolean,
clockHostView: ClockHostView,
clockView: View,
) {
clockHostView.doOnPreDraw {
if (isMiddleView) {
it.pivotX = getCenteredHostViewPivotX(it)
it.pivotY = 0F
clockView.translationX = 0F
clockView.translationY = 0F
} else {
it.pivotX = it.width / 2F
it.pivotY = it.height / 2F
clockView.translationX =
getTranslationDistance(
clockHostView.width,
clockView.width,
clockView.left,
)
clockView.translationY =
getTranslationDistance(
clockHostView.height,
clockView.height,
clockView.top,
)
}
}
}
override fun onNewItem(index: Int) {
onClockSelected.invoke(clocks[index])
}
}
companion object {
// The carousel needs to have at least 5 different clock faces to be infinite
const val MIN_CLOCKS_TO_ENABLE_INFINITE_CAROUSEL = 5
const val CLOCK_CAROUSEL_VIEW_SCALE = 0.5f
const val TRANSITION_DURATION = 250
val itemViewIds =
listOf(
R.id.item_view_0,
R.id.item_view_1,
R.id.item_view_2,
R.id.item_view_3,
R.id.item_view_4
)
fun getScalingUpScale(progress: Float) =
CLOCK_CAROUSEL_VIEW_SCALE + progress * (1f - CLOCK_CAROUSEL_VIEW_SCALE)
fun getScalingDownScale(progress: Float) = 1f - progress * (1f - CLOCK_CAROUSEL_VIEW_SCALE)
// This makes the card only starts to reveal in the last quarter of the trip so
// the card won't overlap the preview.
fun getShowingAlpha(progress: Float) = max(progress - 0.75f, 0f) * 4
// This makes the card starts to hide in the first quarter of the trip so the
// card won't overlap the preview.
fun getHidingAlpha(progress: Float) = max(1f - progress * 4, 0f)
fun getClockHostViewId(rootViewId: Int): Int? {
return when (rootViewId) {
R.id.item_view_0 -> R.id.clock_host_view_0
R.id.item_view_1 -> R.id.clock_host_view_1
R.id.item_view_2 -> R.id.clock_host_view_2
R.id.item_view_3 -> R.id.clock_host_view_3
R.id.item_view_4 -> R.id.clock_host_view_4
else -> null
}
}
fun getClockScaleViewId(rootViewId: Int): Int? {
return when (rootViewId) {
R.id.item_view_0 -> R.id.clock_scale_view_0
R.id.item_view_1 -> R.id.clock_scale_view_1
R.id.item_view_2 -> R.id.clock_scale_view_2
R.id.item_view_3 -> R.id.clock_scale_view_3
R.id.item_view_4 -> R.id.clock_scale_view_4
else -> null
}
}
fun getClockCardViewId(rootViewId: Int): Int? {
return when (rootViewId) {
R.id.item_view_0 -> R.id.item_card_0
R.id.item_view_1 -> R.id.item_card_1
R.id.item_view_2 -> R.id.item_card_2
R.id.item_view_3 -> R.id.item_card_3
R.id.item_view_4 -> R.id.item_card_4
else -> null
}
}
fun isMiddleView(rootViewId: Int): Boolean {
return rootViewId == R.id.item_view_2
}
fun getCenteredHostViewPivotX(hostView: View): Float {
return if (hostView.isLayoutRtl) hostView.width.toFloat() else 0F
}
private fun getTranslationDistance(
hostLength: Int,
frameLength: Int,
edgeDimen: Int,
): Float {
return ((hostLength - frameLength) / 2 - edgeDimen).toFloat()
}
}
}
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