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165 lines
6.2 KiB
Kotlin
165 lines
6.2 KiB
Kotlin
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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package org.mozilla.fenix.tabstray
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import android.content.res.Configuration
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import android.util.DisplayMetrics
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import android.view.View
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import androidx.annotation.VisibleForTesting
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import androidx.core.view.ViewCompat
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import androidx.core.view.WindowInsetsCompat
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import com.google.android.material.bottomsheet.BottomSheetBehavior
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import mozilla.components.support.ktx.android.util.dpToPx
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@VisibleForTesting internal const val EXPANDED_OFFSET_IN_LANDSCAPE_DP = 0
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@VisibleForTesting internal const val EXPANDED_OFFSET_IN_PORTRAIT_DP = 40
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/**
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* The default max dim value of the [TabsTrayDialog].
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*/
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private const val DEFAULT_MAX_DIM = 0.6f
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/**
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* The dim amount is 0.0 - 1.0 inclusive. We use this to convert the view element to the dim scale.
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*/
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private const val DIM_CONVERSION = 1000f
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/**
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* Helper class for updating how the tray looks and behaves depending on app state / internal tray state.
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*
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* @param behavior [BottomSheetBehavior] that will actually control the tray.
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* @param orientation current Configuration.ORIENTATION_* of the device.
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* @param maxNumberOfTabs highest number of tabs in each tray page.
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* @param numberForExpandingTray limit depending on which the tray should be collapsed or expanded.
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* @param displayMetrics [DisplayMetrics] used for adapting resources to the current display.
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*/
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internal class TabSheetBehaviorManager(
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private val behavior: BottomSheetBehavior<out View>,
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orientation: Int,
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private val maxNumberOfTabs: Int,
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private val numberForExpandingTray: Int,
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private val displayMetrics: DisplayMetrics,
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) {
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@VisibleForTesting
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internal var currentOrientation = orientation
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init {
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val isInLandscape = isLandscape(orientation)
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updateBehaviorExpandedOffset(isInLandscape)
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updateBehaviorState(isInLandscape)
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}
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/**
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* Update how the tray looks depending on whether it is shown in landscape or portrait.
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*/
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internal fun updateDependingOnOrientation(newOrientation: Int) {
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if (currentOrientation != newOrientation) {
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currentOrientation = newOrientation
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val isInLandscape = isLandscape(newOrientation)
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updateBehaviorExpandedOffset(isInLandscape)
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updateBehaviorState(isInLandscape)
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}
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}
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@VisibleForTesting
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internal fun updateBehaviorState(isLandscape: Boolean) {
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behavior.state = if (isLandscape || maxNumberOfTabs >= numberForExpandingTray) {
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BottomSheetBehavior.STATE_EXPANDED
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} else {
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BottomSheetBehavior.STATE_COLLAPSED
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}
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}
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@VisibleForTesting
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internal fun updateBehaviorExpandedOffset(isLandscape: Boolean) {
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behavior.expandedOffset = if (isLandscape) {
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EXPANDED_OFFSET_IN_LANDSCAPE_DP.dpToPx(displayMetrics)
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} else {
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EXPANDED_OFFSET_IN_PORTRAIT_DP.dpToPx(displayMetrics)
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}
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}
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@VisibleForTesting
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internal fun isLandscape(orientation: Int) = Configuration.ORIENTATION_LANDSCAPE == orientation
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}
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internal class TraySheetBehaviorCallback(
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@get:VisibleForTesting internal val behavior: BottomSheetBehavior<out View>,
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@get:VisibleForTesting internal val trayInteractor: NavigationInteractor,
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private val tabsTrayDialog: TabsTrayDialog,
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private var newTabFab: View,
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) : BottomSheetBehavior.BottomSheetCallback() {
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@VisibleForTesting
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var draggedLowestSheetTop: Int? = null
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override fun onStateChanged(bottomSheet: View, newState: Int) {
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when (newState) {
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BottomSheetBehavior.STATE_HIDDEN -> trayInteractor.onTabTrayDismissed()
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// We only support expanded and collapsed states.
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// Otherwise the tray may be left in an unusable state. See #14980.
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BottomSheetBehavior.STATE_HALF_EXPANDED ->
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behavior.state = BottomSheetBehavior.STATE_HIDDEN
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// Reset the dragged lowest top value
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BottomSheetBehavior.STATE_EXPANDED, BottomSheetBehavior.STATE_COLLAPSED -> {
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draggedLowestSheetTop = null
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}
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BottomSheetBehavior.STATE_DRAGGING, BottomSheetBehavior.STATE_SETTLING -> {
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// Do nothing. Both cases are handled in the onSlide function.
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}
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}
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}
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override fun onSlide(bottomSheet: View, slideOffset: Float) {
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setTabsTrayDialogDimAmount(bottomSheet.top)
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setFabY(bottomSheet.top)
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}
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private fun setTabsTrayDialogDimAmount(bottomSheetTop: Int) {
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// Get any displayed bottom system bar.
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val bottomSystemBarHeight =
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ViewCompat.getRootWindowInsets(newTabFab)
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?.getInsets(WindowInsetsCompat.Type.systemBars())?.bottom ?: 0
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// Calculate and convert delta to dim amount.
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val appVisibleBottom = newTabFab.rootView.bottom - bottomSystemBarHeight
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val trayTopAppBottomDelta = appVisibleBottom - bottomSheetTop
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val convertedDimValue = trayTopAppBottomDelta / DIM_CONVERSION
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if (convertedDimValue < DEFAULT_MAX_DIM) {
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tabsTrayDialog.window?.setDimAmount(convertedDimValue)
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}
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}
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private fun setFabY(bottomSheetTop: Int) {
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if (behavior.state == BottomSheetBehavior.STATE_DRAGGING) {
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draggedLowestSheetTop = getDraggedLowestSheetTop(bottomSheetTop)
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val dynamicSheetButtonDelta = newTabFab.top - draggedLowestSheetTop!!
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newTabFab.y = getUpdatedFabY(bottomSheetTop, dynamicSheetButtonDelta)
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}
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if (behavior.state == BottomSheetBehavior.STATE_SETTLING) {
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val dynamicSheetButtonDelta = newTabFab.top - getDraggedLowestSheetTop(bottomSheetTop)
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newTabFab.y = getUpdatedFabY(bottomSheetTop, dynamicSheetButtonDelta)
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}
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}
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private fun getDraggedLowestSheetTop(currentBottomSheetTop: Int) =
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if (draggedLowestSheetTop == null || currentBottomSheetTop < draggedLowestSheetTop!!) {
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currentBottomSheetTop
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} else {
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draggedLowestSheetTop!!
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}
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private fun getUpdatedFabY(bottomSheetTop: Int, dynamicSheetButtonDelta: Int) =
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(bottomSheetTop + dynamicSheetButtonDelta).toFloat()
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}
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