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Move page logic into an inner class for better readability

This commit is contained in:
Ensar Sarajčić 2023-08-23 12:41:07 +02:00
parent 8f96073e45
commit 53efffde51
1 changed files with 291 additions and 237 deletions
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416
app/src/main/kotlin/com/simplemobiletools/launcher/views/HomeScreenGrid.kt
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@ -67,14 +67,7 @@ class HomeScreenGrid(context: Context, attrs: AttributeSet, defStyle: Int) : Rel
private var redrawWidgets = false
private var iconSize = 0
private var lastPage = 0
private var currentPage = 0
private var pageChangeLastArea = PageChangeArea.MIDDLE
private var pageChangeLastAreaEntryTime = 0L
private var pageChangeAnimLeftPercentage = 0f
private var pageChangeEnabled = true
private var pageChangeIndicatorsAlpha = 0f
private var pageChangeSwipedPercentage = 0f
private val pager = Pager()
// apply fake margins at the home screen. Real ones would cause the icons be cut at dragging at screen sides
var sideMargins = Rect()
@ -90,26 +83,6 @@ class HomeScreenGrid(context: Context, attrs: AttributeSet, defStyle: Int) : Rel
var itemClickListener: ((HomeScreenGridItem) -> Unit)? = null
var itemLongClickListener: ((HomeScreenGridItem) -> Unit)? = null
private val checkAndExecuteDelayedPageChange: Runnable = Runnable {
if (System.currentTimeMillis() - pageChangeLastAreaEntryTime > PAGE_CHANGE_HOLD_THRESHOLD) {
when (pageChangeLastArea) {
PageChangeArea.RIGHT -> nextOrAdditionalPage(true)
PageChangeArea.LEFT -> prevPage(true)
else -> clearPageChangeFlags()
}
}
}
private val startFadingIndicators: Runnable = Runnable {
ValueAnimator.ofFloat(1f, 0f)
.apply {
addUpdateListener {
pageChangeIndicatorsAlpha = it.animatedValue as Float
redrawGrid()
}
start()
}
}
init {
ViewCompat.setAccessibilityDelegate(this, HomeScreenGridTouchHelper(this))
@ -195,7 +168,7 @@ class HomeScreenGrid(context: Context, attrs: AttributeSet, defStyle: Int) : Rel
}
gridItems.removeIf { it.id == item.id }
if (currentPage > getMaxPage()) {
if (pager.isOutsideOfPageRange()) {
post {
prevPage()
}
@ -230,8 +203,6 @@ class HomeScreenGrid(context: Context, attrs: AttributeSet, defStyle: Int) : Rel
return
}
pageChangeIndicatorsAlpha = 1f
removeCallbacks(startFadingIndicators)
if (draggedItemCurrentCoords.first == -1 && draggedItemCurrentCoords.second == -1 && draggedItem != null) {
if (draggedItem!!.type == ITEM_TYPE_WIDGET) {
val draggedWidgetView = widgetViews.firstOrNull { it.tag == draggedItem?.widgetId }
@ -244,47 +215,10 @@ class HomeScreenGrid(context: Context, attrs: AttributeSet, defStyle: Int) : Rel
}
draggedItemCurrentCoords = Pair(x, y)
if (x > right - sideMargins.right - cellWidth / 2) {
doWithPageChangeDelay(PageChangeArea.RIGHT) {
nextOrAdditionalPage()
}
} else if (x < left + sideMargins.left + cellWidth / 2) {
doWithPageChangeDelay(PageChangeArea.LEFT) {
prevPage()
}
} else {
clearPageChangeFlags()
}
pager.handleItemMovement(x, y)
redrawGrid()
}
private fun clearPageChangeFlags() {
pageChangeLastArea = PageChangeArea.MIDDLE
pageChangeLastAreaEntryTime = 0
removeCallbacks(checkAndExecuteDelayedPageChange)
}
private fun schedulePageChange() {
pageChangeLastAreaEntryTime = System.currentTimeMillis()
postDelayed(checkAndExecuteDelayedPageChange, PAGE_CHANGE_HOLD_THRESHOLD)
}
private fun scheduleIndicatorsFade() {
pageChangeIndicatorsAlpha = 1f
postDelayed(startFadingIndicators, PAGE_INDICATORS_FADE_DELAY)
}
private fun doWithPageChangeDelay(needed: PageChangeArea, pageChangeFunction: () -> Boolean) {
if (pageChangeLastArea != needed) {
pageChangeLastArea = needed
schedulePageChange()
} else if (System.currentTimeMillis() - pageChangeLastAreaEntryTime > PAGE_CHANGE_HOLD_THRESHOLD) {
if (pageChangeFunction()) {
clearPageChangeFlags()
}
}
}
// figure out at which cell was the item dropped, if it is empty
fun itemDraggingStopped() {
widgetViews.forEach {
@ -295,7 +229,7 @@ class HomeScreenGrid(context: Context, attrs: AttributeSet, defStyle: Int) : Rel
return
}
scheduleIndicatorsFade()
pager.itemMovementStopped()
when (draggedItem!!.type) {
ITEM_TYPE_ICON, ITEM_TYPE_SHORTCUT -> addAppIconOrShortcut()
ITEM_TYPE_WIDGET -> addWidget()
@ -371,7 +305,7 @@ class HomeScreenGrid(context: Context, attrs: AttributeSet, defStyle: Int) : Rel
// check if the destination cell is empty
var areAllCellsEmpty = true
val wantedCell = Pair(xIndex, yIndex)
gridItems.filter { it.page == currentPage || it.docked }.forEach { item ->
gridItems.filter { pager.isItemOnCurrentPage(it) || it.docked }.forEach { item ->
for (xCell in item.left..item.right) {
for (yCell in item.getDockAdjustedTop(rowCount)..item.getDockAdjustedBottom(rowCount)) {
val cell = Pair(xCell, yCell)
@ -394,7 +328,7 @@ class HomeScreenGrid(context: Context, attrs: AttributeSet, defStyle: Int) : Rel
top = yIndex
right = xIndex
bottom = yIndex
page = currentPage
page = pager.getCurrentPage()
docked = yIndex == rowCount - 1
ensureBackgroundThread {
@ -410,7 +344,7 @@ class HomeScreenGrid(context: Context, attrs: AttributeSet, defStyle: Int) : Rel
yIndex,
xIndex,
yIndex,
currentPage,
pager.getCurrentPage(),
draggedItem!!.packageName,
draggedItem!!.activityName,
draggedItem!!.title,
@ -477,7 +411,7 @@ class HomeScreenGrid(context: Context, attrs: AttributeSet, defStyle: Int) : Rel
}
var areAllCellsEmpty = true
gridItems.filter { it.id != draggedItem?.id && (it.page == currentPage || it.docked) }.forEach { item ->
gridItems.filter { it.id != draggedItem?.id && (pager.isItemOnCurrentPage(it) || it.docked) }.forEach { item ->
for (xCell in item.left..item.right) {
for (yCell in item.getDockAdjustedTop(rowCount)..item.getDockAdjustedBottom(rowCount)) {
val cell = Pair(xCell, yCell)
@ -497,7 +431,7 @@ class HomeScreenGrid(context: Context, attrs: AttributeSet, defStyle: Int) : Rel
top = widgetRect.top
right = widgetRect.right
bottom = widgetRect.bottom
page = currentPage
page = pager.getCurrentPage()
}
ensureBackgroundThread {
@ -514,7 +448,7 @@ class HomeScreenGrid(context: Context, attrs: AttributeSet, defStyle: Int) : Rel
widgetItem.top,
widgetItem.right,
widgetItem.bottom,
currentPage,
pager.getCurrentPage(),
false,
widgetItem.id!!
)
@ -573,7 +507,7 @@ class HomeScreenGrid(context: Context, attrs: AttributeSet, defStyle: Int) : Rel
removeItemFromHomeScreen(item)
}
if (currentPage > getMaxPage()) {
if (pager.isOutsideOfPageRange()) {
prevPage(redraw = true)
}
}
@ -608,7 +542,7 @@ class HomeScreenGrid(context: Context, attrs: AttributeSet, defStyle: Int) : Rel
}
private fun updateWidgetPositionAndSize(widgetView: AppWidgetHostView, item: HomeScreenGridItem): Size {
val currentViewPosition = getCurrentViewPositionInFullPageSpace() * width.toFloat()
val currentViewPosition = pager.getCurrentViewPositionInFullPageSpace() * width.toFloat()
val x = calculateWidgetX(item.left) + width * item.page - currentViewPosition
widgetView.x = x
widgetView.y = calculateWidgetY(item.top)
@ -666,8 +600,8 @@ class HomeScreenGrid(context: Context, attrs: AttributeSet, defStyle: Int) : Rel
fillCellSizes()
}
val currentXFactor = getXFactorForCurrentPage()
val lastXFactor = getXFactorForLastPage()
val currentXFactor = pager.getXFactorForCurrentPage()
val lastXFactor = pager.getXFactorForLastPage()
fun handleItemDrawing(item: HomeScreenGridItem, xFactor: Float) {
if (item.id != draggedItem?.id) {
@ -702,7 +636,7 @@ class HomeScreenGrid(context: Context, attrs: AttributeSet, defStyle: Int) : Rel
}
}
gridItems.filter { (it.drawable != null && it.type == ITEM_TYPE_ICON || it.type == ITEM_TYPE_SHORTCUT) && it.page == currentPage && !it.docked }
gridItems.filter { (it.drawable != null && it.type == ITEM_TYPE_ICON || it.type == ITEM_TYPE_SHORTCUT) && pager.isItemOnCurrentPage(it) && !it.docked }
.forEach { item ->
if (item.outOfBounds()) {
return@forEach
@ -717,8 +651,8 @@ class HomeScreenGrid(context: Context, attrs: AttributeSet, defStyle: Int) : Rel
handleItemDrawing(item, 0f)
}
if (pageChangeAnimLeftPercentage > 0f) {
gridItems.filter { (it.drawable != null && it.type == ITEM_TYPE_ICON || it.type == ITEM_TYPE_SHORTCUT) && it.page == lastPage && !it.docked }
if (pager.isAnimatingPageChange()) {
gridItems.filter { (it.drawable != null && it.type == ITEM_TYPE_ICON || it.type == ITEM_TYPE_SHORTCUT) && pager.isItemOnLastPage(it) && !it.docked }
.forEach { item ->
if (item.outOfBounds()) {
return@forEach
@ -728,10 +662,10 @@ class HomeScreenGrid(context: Context, attrs: AttributeSet, defStyle: Int) : Rel
}
}
if (abs(pageChangeSwipedPercentage) > 0f) {
if (pager.isSwiped()) {
gridItems.filter {
(it.drawable != null && it.type == ITEM_TYPE_ICON || it.type == ITEM_TYPE_SHORTCUT)
&& ((pageChangeSwipedPercentage > 0f && it.page == currentPage - 1) || (pageChangeSwipedPercentage < 0f && it.page == currentPage + 1))
&& pager.isItemInSwipeRange(it)
&& !it.docked
}.forEach { item ->
if (item.outOfBounds()) {
@ -755,19 +689,15 @@ class HomeScreenGrid(context: Context, attrs: AttributeSet, defStyle: Int) : Rel
}
// Only draw page indicators when there is a need for it
if (pageChangeAnimLeftPercentage > 0f || pageChangeIndicatorsAlpha != 0f || abs(pageChangeSwipedPercentage) > 0f) {
val pageCount = max(getMaxPage(), currentPage) + 1
if (pager.shouldDisplayPageChangeIndicator()) {
val pageCount = pager.getPageCount()
val pageIndicatorsRequiredWidth = pageCount * pageIndicatorRadius * 2 + pageCount * (pageIndicatorMargin - 1)
val usableWidth = getFakeWidth()
val pageIndicatorsStart = (usableWidth - pageIndicatorsRequiredWidth) / 2 + sideMargins.left
var currentPageIndicatorLeft = pageIndicatorsStart
val pageIndicatorY = cellYCoords[rowCount - 1].toFloat() + sideMargins.top + extraYMargin + iconMargin
val pageIndicatorStep = pageIndicatorRadius * 2 + pageIndicatorMargin
if (pageChangeIndicatorsAlpha != 0f) {
emptyPageIndicatorPaint.alpha = (pageChangeIndicatorsAlpha * 255.0f).toInt()
} else {
emptyPageIndicatorPaint.alpha = 255
}
emptyPageIndicatorPaint.alpha = pager.getPageChangeIndicatorsAlpha()
// Draw empty page indicators
for (page in 0 until pageCount) {
canvas.drawCircle(currentPageIndicatorLeft + pageIndicatorRadius, pageIndicatorY, pageIndicatorRadius, emptyPageIndicatorPaint)
@ -775,12 +705,8 @@ class HomeScreenGrid(context: Context, attrs: AttributeSet, defStyle: Int) : Rel
}
// Draw current page indicator on exact position
val currentIndicatorPosition = pageIndicatorsStart + getCurrentViewPositionInFullPageSpace() * pageIndicatorStep
if (pageChangeIndicatorsAlpha != 0f) {
currentPageIndicatorPaint.alpha = (pageChangeIndicatorsAlpha * 255.0f).toInt()
} else {
currentPageIndicatorPaint.alpha = 255
}
val currentIndicatorPosition = pageIndicatorsStart + pager.getCurrentViewPositionInFullPageSpace() * pageIndicatorStep
currentPageIndicatorPaint.alpha = pager.getPageChangeIndicatorsAlpha()
canvas.drawCircle(currentIndicatorPosition + pageIndicatorRadius, pageIndicatorY, pageIndicatorRadius, currentPageIndicatorPaint)
}
@ -927,7 +853,7 @@ class HomeScreenGrid(context: Context, attrs: AttributeSet, defStyle: Int) : Rel
}
fun isClickingGridItem(x: Int, y: Int): HomeScreenGridItem? {
for (gridItem in gridItems.filter { it.page == currentPage || it.docked }) {
for (gridItem in gridItems.filter { it.page == pager.getCurrentPage() || it.docked }) {
if (gridItem.outOfBounds()) {
continue
}
@ -1023,90 +949,66 @@ class HomeScreenGrid(context: Context, attrs: AttributeSet, defStyle: Int) : Rel
private fun getMaxPage() = gridItems.filter { !it.docked && !it.outOfBounds() }.maxOfOrNull { it.page } ?: 0
private fun nextOrAdditionalPage(redraw: Boolean = false): Boolean {
if (currentPage < getMaxPage() + 1 && pageChangeEnabled) {
lastPage = currentPage
currentPage++
handlePageChange(redraw)
return true
}
return false
}
fun nextPage(redraw: Boolean = false): Boolean {
if (currentPage < getMaxPage() && pageChangeEnabled) {
lastPage = currentPage
currentPage++
handlePageChange(redraw)
return true
}
return false
return pager.nextPage(redraw)
}
fun prevPage(redraw: Boolean = false): Boolean {
if (currentPage > 0 && pageChangeEnabled) {
lastPage = currentPage
currentPage--
handlePageChange(redraw)
return true
}
return false
return pager.prevPage(redraw)
}
fun skipToPage(targetPage: Int): Boolean {
if (currentPage != targetPage && targetPage < getMaxPage() + 1) {
lastPage = currentPage
currentPage = targetPage
handlePageChange()
return true
}
return false
return pager.skipToPage(targetPage)
}
fun getCurrentIconSize(): Int = iconSize
private fun handlePageChange(redraw: Boolean = false) {
pageChangeEnabled = false
pageChangeIndicatorsAlpha = 0f
val startingAt = 1 - abs(pageChangeSwipedPercentage)
pageChangeSwipedPercentage = 0f
removeCallbacks(startFadingIndicators)
if (redraw) {
redrawGrid()
fun setSwipeMovement(diffX: Float) {
pager.setSwipeMovement(diffX)
}
ValueAnimator.ofFloat(startingAt, 0f)
.apply {
addUpdateListener {
pageChangeAnimLeftPercentage = it.animatedValue as Float
redrawGrid()
fun finalizeSwipe() {
pager.finalizeSwipe()
}
addListener(object : AnimatorListenerAdapter() {
override fun onAnimationEnd(animation: Animator) {
super.onAnimationEnd(animation)
pageChangeAnimLeftPercentage = 0f
pageChangeEnabled = true
lastPage = currentPage
if (draggedItem != null) {
schedulePageChange()
private inner class Pager {
private var lastPage = 0
private var currentPage = 0
private var pageChangeLastArea = PageChangeArea.MIDDLE
private var pageChangeLastAreaEntryTime = 0L
private var pageChangeAnimLeftPercentage = 0f
private var pageChangeEnabled = true
private var pageChangeIndicatorsAlpha = 0f
private var pageChangeSwipedPercentage = 0f
fun getCurrentPage() = currentPage
fun isItemOnCurrentPage(item: HomeScreenGridItem) = item.page == currentPage
fun isItemOnLastPage(item: HomeScreenGridItem) = item.page == lastPage
fun getPageCount() = max(getMaxPage(), pager.currentPage) + 1
fun isOutsideOfPageRange() = currentPage > getMaxPage()
fun isItemInSwipeRange(item: HomeScreenGridItem) =
((pageChangeSwipedPercentage > 0f && item.page == currentPage - 1) || (pageChangeSwipedPercentage < 0f && item.page == currentPage + 1))
fun isSwiped() = abs(pageChangeSwipedPercentage) > 0f
fun isAnimatingPageChange() = pager.pageChangeAnimLeftPercentage > 0f
fun shouldDisplayPageChangeIndicator() = isSwiped() || isAnimatingPageChange() || pageChangeIndicatorsAlpha > 0f
fun getPageChangeIndicatorsAlpha() = if (pageChangeIndicatorsAlpha != 0f) {
(pager.pageChangeIndicatorsAlpha * 255.0f).toInt()
} else {
clearPageChangeFlags()
}
scheduleIndicatorsFade()
redrawGrid()
}
})
start()
}
255
}
private fun isBetweenPages() =
(pageChangeSwipedPercentage > 0f && pageChangeSwipedPercentage < 1f) || (pageChangeAnimLeftPercentage > 0f && pageChangeAnimLeftPercentage < 1f)
private fun getXFactorForCurrentPage(): Float {
fun getXFactorForCurrentPage(): Float {
return if (abs(pageChangeSwipedPercentage) > 0f) {
pageChangeSwipedPercentage
} else {
@ -1118,7 +1020,7 @@ class HomeScreenGrid(context: Context, attrs: AttributeSet, defStyle: Int) : Rel
}
}
private fun getXFactorForLastPage(): Float {
fun getXFactorForLastPage(): Float {
return if (abs(pageChangeSwipedPercentage) > 0f) {
(1 - abs(pageChangeSwipedPercentage)) * -sign(pageChangeSwipedPercentage)
} else {
@ -1130,6 +1032,26 @@ class HomeScreenGrid(context: Context, attrs: AttributeSet, defStyle: Int) : Rel
}
}
fun getCurrentViewPositionInFullPageSpace(): Float {
val rangeStart = lastPage.toFloat()
val rangeEndPage = if (abs(pageChangeSwipedPercentage) > 0f) {
if (pageChangeSwipedPercentage > 0f) {
currentPage - 1
} else {
currentPage + 1
}
} else {
currentPage
}
val rangeEnd = rangeEndPage.toFloat()
val lerpAmount = if (pageChangeAnimLeftPercentage > 0f) {
1 - pageChangeAnimLeftPercentage
} else {
abs(pageChangeSwipedPercentage)
}
return MathUtils.lerp(rangeStart, rangeEnd, lerpAmount)
}
fun setSwipeMovement(diffX: Float) {
if (!pageChangeEnabled || draggedItem != null) {
return
@ -1165,24 +1087,155 @@ class HomeScreenGrid(context: Context, attrs: AttributeSet, defStyle: Int) : Rel
}
}
private fun getCurrentViewPositionInFullPageSpace(): Float {
val rangeStart = lastPage.toFloat()
val rangeEndPage = if (abs(pageChangeSwipedPercentage) > 0f) {
if (pageChangeSwipedPercentage > 0f) {
currentPage - 1
} else {
currentPage + 1
fun handleItemMovement(x: Int, y: Int) {
showIndicators()
if (x > right - sideMargins.right - cellWidth / 2) {
doWithPageChangeDelay(PageChangeArea.RIGHT) {
nextOrAdditionalPage()
}
} else if (x < left + sideMargins.left + cellWidth / 2) {
doWithPageChangeDelay(PageChangeArea.LEFT) {
prevPage()
}
} else {
currentPage
clearPageChangeFlags()
}
val rangeEnd = rangeEndPage.toFloat()
val lerpAmount = if (pageChangeAnimLeftPercentage > 0f) {
1 - pageChangeAnimLeftPercentage
}
fun itemMovementStopped() {
scheduleIndicatorsFade()
}
fun nextPage(redraw: Boolean = false): Boolean {
if (currentPage < getMaxPage() && pageChangeEnabled) {
lastPage = currentPage
currentPage++
handlePageChange(redraw)
return true
}
return false
}
fun prevPage(redraw: Boolean = false): Boolean {
if (currentPage > 0 && pageChangeEnabled) {
lastPage = currentPage
currentPage--
handlePageChange(redraw)
return true
}
return false
}
fun skipToPage(targetPage: Int): Boolean {
if (currentPage != targetPage && targetPage < getMaxPage() + 1) {
lastPage = currentPage
currentPage = targetPage
handlePageChange()
return true
}
return false
}
private val checkAndExecuteDelayedPageChange: Runnable = Runnable {
if (System.currentTimeMillis() - pageChangeLastAreaEntryTime > PAGE_CHANGE_HOLD_THRESHOLD) {
when (pageChangeLastArea) {
PageChangeArea.RIGHT -> nextOrAdditionalPage(true)
PageChangeArea.LEFT -> prevPage(true)
else -> clearPageChangeFlags()
}
}
}
private val startFadingIndicators: Runnable = Runnable {
ValueAnimator.ofFloat(1f, 0f)
.apply {
addUpdateListener {
pageChangeIndicatorsAlpha = it.animatedValue as Float
redrawGrid()
}
start()
}
}
private fun showIndicators() {
pageChangeIndicatorsAlpha = 1f
removeCallbacks(startFadingIndicators)
}
private fun clearPageChangeFlags() {
pageChangeLastArea = PageChangeArea.MIDDLE
pageChangeLastAreaEntryTime = 0
removeCallbacks(checkAndExecuteDelayedPageChange)
}
private fun schedulePageChange() {
pageChangeLastAreaEntryTime = System.currentTimeMillis()
postDelayed(checkAndExecuteDelayedPageChange, PAGE_CHANGE_HOLD_THRESHOLD)
}
private fun scheduleIndicatorsFade() {
pageChangeIndicatorsAlpha = 1f
postDelayed(startFadingIndicators, PAGE_INDICATORS_FADE_DELAY)
}
private fun doWithPageChangeDelay(needed: PageChangeArea, pageChangeFunction: () -> Boolean) {
if (pageChangeLastArea != needed) {
pageChangeLastArea = needed
schedulePageChange()
} else if (System.currentTimeMillis() - pageChangeLastAreaEntryTime > PAGE_CHANGE_HOLD_THRESHOLD) {
if (pageChangeFunction()) {
clearPageChangeFlags()
}
}
}
private fun nextOrAdditionalPage(redraw: Boolean = false): Boolean {
if (currentPage < getMaxPage() + 1 && pageChangeEnabled) {
lastPage = currentPage
currentPage++
handlePageChange(redraw)
return true
}
return false
}
private fun handlePageChange(redraw: Boolean = false) {
pageChangeEnabled = false
pageChangeIndicatorsAlpha = 0f
val startingAt = 1 - abs(pageChangeSwipedPercentage)
pageChangeSwipedPercentage = 0f
removeCallbacks(startFadingIndicators)
if (redraw) {
redrawGrid()
}
ValueAnimator.ofFloat(startingAt, 0f)
.apply {
addUpdateListener {
pageChangeAnimLeftPercentage = it.animatedValue as Float
redrawGrid()
}
addListener(object : AnimatorListenerAdapter() {
override fun onAnimationEnd(animation: Animator) {
super.onAnimationEnd(animation)
pageChangeAnimLeftPercentage = 0f
pageChangeEnabled = true
lastPage = currentPage
if (draggedItem != null) {
schedulePageChange()
} else {
abs(pageChangeSwipedPercentage)
clearPageChangeFlags()
}
scheduleIndicatorsFade()
redrawGrid()
}
})
start()
}
}
return MathUtils.lerp(rangeStart, rangeEnd, lerpAmount)
}
companion object {
@ -1195,4 +1248,5 @@ class HomeScreenGrid(context: Context, attrs: AttributeSet, defStyle: Int) : Rel
RIGHT
}
}
}