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iceraven-browser/app/src/main/java/org/mozilla/fenix/tabstray/TabLayoutMediator.kt

94 lines
3.1 KiB
Kotlin

/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
package org.mozilla.fenix.tabstray
import androidx.annotation.VisibleForTesting
import androidx.viewpager2.widget.ViewPager2
import com.google.android.material.tabs.TabLayout
import mozilla.components.browser.state.store.BrowserStore
import mozilla.components.support.base.feature.LifecycleAwareFeature
import mozilla.telemetry.glean.private.NoExtras
import org.mozilla.fenix.GleanMetrics.TabsTray
import org.mozilla.fenix.browser.browsingmode.BrowsingModeManager
import org.mozilla.fenix.tabstray.TrayPagerAdapter.Companion.POSITION_NORMAL_TABS
import org.mozilla.fenix.tabstray.TrayPagerAdapter.Companion.POSITION_PRIVATE_TABS
import org.mozilla.fenix.utils.Do
/**
* Selected the selected pager depending on the [BrowserStore] state and synchronizes user actions
* with the pager position.
*/
class TabLayoutMediator(
private val tabLayout: TabLayout,
private val tabPager: ViewPager2,
interactor: TabsTrayInteractor,
private val browsingModeManager: BrowsingModeManager,
private val tabsTrayStore: TabsTrayStore,
) : LifecycleAwareFeature {
private val observer = TabLayoutObserver(interactor)
/**
* Start observing the [TabLayout] and select the current tab for initial state.
*/
override fun start() {
tabLayout.addOnTabSelectedListener(observer)
selectActivePage()
}
override fun stop() {
tabLayout.removeOnTabSelectedListener(observer)
}
@VisibleForTesting
internal fun selectActivePage() {
val selectedPagerPosition =
when (browsingModeManager.mode.isPrivate) {
true -> POSITION_PRIVATE_TABS
false -> POSITION_NORMAL_TABS
}
selectTabAtPosition(selectedPagerPosition)
}
fun selectTabAtPosition(position: Int) {
tabLayout.getTabAt(position)?.select()
tabPager.setCurrentItem(position, false)
tabsTrayStore.dispatch(TabsTrayAction.PageSelected(Page.positionToPage(position)))
}
}
/**
* An observer for the [TabLayout] used for the Tabs Tray.
*/
internal class TabLayoutObserver(
private val interactor: TabsTrayInteractor,
) : TabLayout.OnTabSelectedListener {
private var initialScroll = true
override fun onTabSelected(tab: TabLayout.Tab) {
// Do not animate the initial scroll when opening the tabs tray.
val animate = if (initialScroll) {
initialScroll = false
false
} else {
true
}
interactor.onTrayPositionSelected(tab.position, animate)
Do exhaustive when (Page.positionToPage(tab.position)) {
Page.NormalTabs -> TabsTray.normalModeTapped.record(NoExtras())
Page.PrivateTabs -> TabsTray.privateModeTapped.record(NoExtras())
Page.SyncedTabs -> TabsTray.syncedModeTapped.record(NoExtras())
}
}
override fun onTabUnselected(tab: TabLayout.Tab) = Unit
override fun onTabReselected(tab: TabLayout.Tab) = Unit
}