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103 lines
4.0 KiB
Kotlin
103 lines
4.0 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.constraintlayout.widget.ConstraintLayout
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import com.google.android.material.bottomsheet.BottomSheetBehavior
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import com.google.android.material.bottomsheet.BottomSheetBehavior.STATE_HIDDEN
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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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* 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 navigationInteractor [NavigationInteractor] used for tray updates / navigation.
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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<ConstraintLayout>,
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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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navigationInteractor: NavigationInteractor,
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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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behavior.addBottomSheetCallback(
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TraySheetBehaviorCallback(behavior, navigationInteractor)
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)
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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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@VisibleForTesting
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internal class TraySheetBehaviorCallback(
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@VisibleForTesting internal val behavior: BottomSheetBehavior<ConstraintLayout>,
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@VisibleForTesting internal val trayInteractor: NavigationInteractor
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) : BottomSheetBehavior.BottomSheetCallback() {
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override fun onStateChanged(bottomSheet: View, newState: Int) {
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if (newState == STATE_HIDDEN) {
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trayInteractor.onTabTrayDismissed()
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} else if (newState == BottomSheetBehavior.STATE_HALF_EXPANDED) {
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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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behavior.state = STATE_HIDDEN
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}
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}
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override fun onSlide(bottomSheet: View, slideOffset: Float) = Unit
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}
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