Merge branch 'develop' into live_location_labs_flag

* develop:
  Space explore rooms screen alignment with design in figma (#5834)
  leaving space aligned with ios (#5942)
  Fix usage of System.currentTimeMillis(). This a bit mocky but anyway it's better to use SystemClock.elapsedRealtime() for this case.

changelog.d/5658.feature

@@ -0,0 +1 @@
+Space explore screen changes: removed space card, added rooms filtering

changelog.d/5728.misc

@@ -0,0 +1 @@
+leaving space experience changed to be aligned with iOS

library/core-utils/src/main/java/im/vector/lib/core/utils/flow/TimingOperators.kt

@@ -16,6 +16,7 @@
 
 package im.vector.lib.core.utils.flow
 
+import android.os.SystemClock
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.ExperimentalCoroutinesApi
 import kotlinx.coroutines.channels.Channel
@@ -68,10 +69,10 @@ fun <T> Flow<T>.chunk(durationInMillis: Long): Flow<List<T>> {
 
 @ExperimentalCoroutinesApi
 fun <T> Flow<T>.throttleFirst(windowDuration: Long): Flow<T> = flow {
-    var windowStartTime = System.currentTimeMillis()
+    var windowStartTime = SystemClock.elapsedRealtime()
     var emitted = false
     collect { value ->
-        val currentTime = System.currentTimeMillis()
+        val currentTime = SystemClock.elapsedRealtime()
         val delta = currentTime - windowStartTime
         if (delta >= windowDuration) {
             windowStartTime += delta / windowDuration * windowDuration

vector/src/androidTest/java/im/vector/app/ui/robot/space/SpaceMenuRobot.kt

@@ -104,11 +104,10 @@ class SpaceMenuRobot {
 
     fun leaveSpace() {
         clickOnSheet(R.id.leaveSpace)
-        waitUntilDialogVisible(ViewMatchers.withId(R.id.leaveButton))
-        clickOn(R.id.leave_selected)
         waitUntilActivityVisible<SpaceLeaveAdvancedActivity> {
             waitUntilViewVisible(ViewMatchers.withId(R.id.roomList))
         }
+        clickOn(R.id.spaceLeaveSelectAll)
         clickOn(R.id.spaceLeaveButton)
         waitUntilViewVisible(ViewMatchers.withId(R.id.groupListView))
     }

vector/src/main/java/im/vector/app/core/utils/ToggleableAppBarLayoutBehavior.kt

@@ -0,0 +1,67 @@
+/*
+ * Copyright (c) 2022 New Vector Ltd
+ *
+ * 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 im.vector.app.core.utils
+
+import android.content.Context
+import android.util.AttributeSet
+import android.view.View
+import androidx.coordinatorlayout.widget.CoordinatorLayout
+import com.google.android.material.appbar.AppBarLayout
+
+/**
+ * [AppBarLayout.Behavior] subclass with a possibility to disable behavior.
+ * Useful for cases when in some view state we want prevent toolbar from collapsing/expanding by scroll events
+ */
+class ToggleableAppBarLayoutBehavior : AppBarLayout.Behavior {
+    constructor() : super()
+    constructor(context: Context, attrs: AttributeSet) : super(context, attrs)
+
+    var isEnabled = true
+
+    override fun onStartNestedScroll(parent: CoordinatorLayout,
+                                     child: AppBarLayout,
+                                     directTargetChild: View,
+                                     target: View,
+                                     nestedScrollAxes: Int,
+                                     type: Int): Boolean {
+        return isEnabled && super.onStartNestedScroll(parent, child, directTargetChild, target, nestedScrollAxes, type)
+    }
+
+    override fun onNestedScroll(coordinatorLayout: CoordinatorLayout,
+                                child: AppBarLayout,
+                                target: View,
+                                dxConsumed: Int,
+                                dyConsumed: Int,
+                                dxUnconsumed: Int,
+                                dyUnconsumed: Int,
+                                type: Int,
+                                consumed: IntArray) {
+        if (!isEnabled) return
+        super.onNestedScroll(coordinatorLayout, child, target, dxConsumed, dyConsumed, dxUnconsumed, dyUnconsumed, type, consumed)
+    }
+
+    override fun onNestedPreScroll(coordinatorLayout: CoordinatorLayout,
+                                   child: AppBarLayout,
+                                   target: View,
+                                   dx: Int,
+                                   dy: Int,
+                                   consumed: IntArray,
+                                   type: Int) {
+        if (!isEnabled) return
+        super.onNestedPreScroll(coordinatorLayout, child, target, dx, dy, consumed, type)
+    }
+}

vector/src/main/java/im/vector/app/features/home/room/list/SpaceDirectoryFilterNoResults.kt

@@ -0,0 +1,27 @@
+/*
+ * Copyright 2019 New Vector Ltd
+ *
+ * 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 im.vector.app.features.home.room.list
+
+import com.airbnb.epoxy.EpoxyModelClass
+import im.vector.app.R
+import im.vector.app.core.epoxy.VectorEpoxyHolder
+import im.vector.app.core.epoxy.VectorEpoxyModel
+
+@EpoxyModelClass(layout = R.layout.item_space_directory_filter_no_results)
+abstract class SpaceDirectoryFilterNoResults : VectorEpoxyModel<SpaceDirectoryFilterNoResults.Holder>() {
+    class Holder : VectorEpoxyHolder()
+}

vector/src/main/java/im/vector/app/features/spaces/LeaveSpaceBottomSheet.kt

@@ -1,194 +0,0 @@
-/*
- * Copyright (c) 2021 New Vector Ltd
- *
- * 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 im.vector.app.features.spaces
-
-import android.app.Activity
-import android.graphics.Typeface
-import android.os.Bundle
-import android.os.Parcelable
-import android.view.LayoutInflater
-import android.view.View
-import android.view.ViewGroup
-import androidx.core.text.toSpannable
-import androidx.core.view.isInvisible
-import androidx.core.view.isVisible
-import androidx.lifecycle.lifecycleScope
-import com.airbnb.mvrx.Fail
-import com.airbnb.mvrx.Loading
-import com.airbnb.mvrx.args
-import com.airbnb.mvrx.parentFragmentViewModel
-import com.airbnb.mvrx.withState
-import dagger.hilt.android.AndroidEntryPoint
-import im.vector.app.R
-import im.vector.app.core.error.ErrorFormatter
-import im.vector.app.core.extensions.registerStartForActivityResult
-import im.vector.app.core.extensions.setTextOrHide
-import im.vector.app.core.platform.VectorBaseBottomSheetDialogFragment
-import im.vector.app.core.resources.ColorProvider
-import im.vector.app.core.utils.styleMatchingText
-import im.vector.app.databinding.BottomSheetLeaveSpaceBinding
-import im.vector.app.features.displayname.getBestName
-import im.vector.app.features.spaces.leave.SpaceLeaveAdvancedActivity
-import kotlinx.coroutines.flow.launchIn
-import kotlinx.coroutines.flow.onEach
-import kotlinx.parcelize.Parcelize
-import me.gujun.android.span.span
-import org.matrix.android.sdk.api.util.toMatrixItem
-import reactivecircus.flowbinding.android.widget.checkedChanges
-import javax.inject.Inject
-
-@AndroidEntryPoint
-class LeaveSpaceBottomSheet : VectorBaseBottomSheetDialogFragment<BottomSheetLeaveSpaceBinding>() {
-
-    val settingsViewModel: SpaceMenuViewModel by parentFragmentViewModel()
-
-    override fun getBinding(inflater: LayoutInflater, container: ViewGroup?): BottomSheetLeaveSpaceBinding {
-        return BottomSheetLeaveSpaceBinding.inflate(inflater, container, false)
-    }
-
-    @Inject lateinit var colorProvider: ColorProvider
-    @Inject lateinit var errorFormatter: ErrorFormatter
-
-    @Parcelize
-    data class Args(
-            val spaceId: String
-    ) : Parcelable
-
-    override val showExpanded = true
-
-    private val spaceArgs: SpaceBottomSheetSettingsArgs by args()
-
-    private val cherryPickLeaveActivityResult = registerStartForActivityResult { activityResult ->
-        if (activityResult.resultCode == Activity.RESULT_OK) {
-            // nothing actually?
-        } else {
-            // move back to default
-            settingsViewModel.handle(SpaceLeaveViewAction.SetAutoLeaveAll)
-        }
-    }
-
-    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
-        super.onViewCreated(view, savedInstanceState)
-        views.autoLeaveRadioGroup.checkedChanges()
-                .onEach {
-                    when (it) {
-                        views.leaveAll.id      -> {
-                            settingsViewModel.handle(SpaceLeaveViewAction.SetAutoLeaveAll)
-                        }
-                        views.leaveNone.id     -> {
-                            settingsViewModel.handle(SpaceLeaveViewAction.SetAutoLeaveNone)
-                        }
-                        views.leaveSelected.id -> {
-                            settingsViewModel.handle(SpaceLeaveViewAction.SetAutoLeaveSelected)
-                            // launch dedicated activity
-                            cherryPickLeaveActivityResult.launch(
-                                    SpaceLeaveAdvancedActivity.newIntent(requireContext(), spaceArgs.spaceId)
-                            )
-                        }
-                    }
-                }
-                .launchIn(viewLifecycleOwner.lifecycleScope)
-
-        views.leaveButton.debouncedClicks {
-            settingsViewModel.handle(SpaceLeaveViewAction.LeaveSpace)
-        }
-
-        views.cancelButton.debouncedClicks {
-            dismiss()
-        }
-    }
-
-    override fun invalidate() = withState(settingsViewModel) { state ->
-        super.invalidate()
-
-        val spaceSummary = state.spaceSummary ?: return@withState
-        val bestName = spaceSummary.toMatrixItem().getBestName()
-        val commonText = getString(R.string.space_leave_prompt_msg_with_name, bestName)
-                .toSpannable().styleMatchingText(bestName, Typeface.BOLD)
-
-        val warningMessage: CharSequence = if (spaceSummary.otherMemberIds.isEmpty()) {
-            span {
-                +commonText
-                +"\n\n"
-                span(getString(R.string.space_leave_prompt_msg_only_you)) {
-                    textColor = colorProvider.getColorFromAttribute(R.attr.colorError)
-                }
-            }
-        } else if (state.isLastAdmin) {
-            span {
-                +commonText
-                +"\n\n"
-                span(getString(R.string.space_leave_prompt_msg_as_admin)) {
-                    textColor = colorProvider.getColorFromAttribute(R.attr.colorError)
-                }
-            }
-        } else if (!spaceSummary.isPublic) {
-            span {
-                +commonText
-                +"\n\n"
-                span(getString(R.string.space_leave_prompt_msg_private)) {
-                    textColor = colorProvider.getColorFromAttribute(R.attr.colorError)
-                }
-            }
-        } else {
-            commonText
-        }
-
-        views.bottomLeaveSpaceWarningText.setTextOrHide(warningMessage)
-
-        views.inlineErrorText.setTextOrHide(null)
-        if (state.leavingState is Loading) {
-            views.leaveButton.isInvisible = true
-            views.cancelButton.isInvisible = true
-            views.leaveProgress.isVisible = true
-        } else {
-            views.leaveButton.isInvisible = false
-            views.cancelButton.isInvisible = false
-            views.leaveProgress.isVisible = false
-            if (state.leavingState is Fail) {
-                views.inlineErrorText.setTextOrHide(errorFormatter.toHumanReadable(state.leavingState.error))
-            }
-        }
-
-        val hasChildren = (spaceSummary.spaceChildren?.size ?: 0) > 0
-        if (hasChildren) {
-            views.autoLeaveRadioGroup.isVisible = true
-            when (state.leaveMode) {
-                SpaceMenuState.LeaveMode.LEAVE_ALL      -> {
-                    views.autoLeaveRadioGroup.check(views.leaveAll.id)
-                }
-                SpaceMenuState.LeaveMode.LEAVE_NONE     -> {
-                    views.autoLeaveRadioGroup.check(views.leaveNone.id)
-                }
-                SpaceMenuState.LeaveMode.LEAVE_SELECTED -> {
-                    views.autoLeaveRadioGroup.check(views.leaveSelected.id)
-                }
-            }
-        } else {
-            views.autoLeaveRadioGroup.isVisible = false
-        }
-    }
-
-    companion object {
-
-        fun newInstance(spaceId: String): LeaveSpaceBottomSheet {
-            return LeaveSpaceBottomSheet().apply {
-                setArguments(SpaceBottomSheetSettingsArgs(spaceId))
-            }
-        }
-    }
-}

vector/src/main/java/im/vector/app/features/spaces/SpaceSettingsMenuBottomSheet.kt

@@ -35,6 +35,7 @@ import im.vector.app.features.home.AvatarRenderer
 import im.vector.app.features.navigation.Navigator
 import im.vector.app.features.rageshake.BugReporter
 import im.vector.app.features.roomprofile.RoomProfileActivity
+import im.vector.app.features.spaces.leave.SpaceLeaveAdvancedActivity
 import im.vector.app.features.spaces.manage.ManageType
 import im.vector.app.features.spaces.manage.SpaceManageActivity
 import kotlinx.parcelize.Parcelize
@@ -109,7 +110,7 @@ class SpaceSettingsMenuBottomSheet : VectorBaseBottomSheetDialogFragment<BottomS
         }
 
         views.leaveSpace.views.bottomSheetActionClickableZone.debouncedClicks {
-            LeaveSpaceBottomSheet.newInstance(spaceArgs.spaceId).show(childFragmentManager, "LOGOUT")
+            startActivity(SpaceLeaveAdvancedActivity.newIntent(requireContext(), spaceArgs.spaceId))
         }
     }
 

vector/src/main/java/im/vector/app/features/spaces/explore/SpaceDirectoryController.kt

@@ -34,6 +34,8 @@ import im.vector.app.core.ui.list.genericEmptyWithActionItem
 import im.vector.app.core.ui.list.genericPillItem
 import im.vector.app.features.home.AvatarRenderer
 import im.vector.app.features.home.room.list.spaceChildInfoItem
+import im.vector.app.features.home.room.list.spaceDirectoryFilterNoResults
+import im.vector.app.features.spaces.manage.SpaceChildInfoMatchFilter
 import im.vector.lib.core.utils.epoxy.charsequence.toEpoxyCharSequence
 import me.gujun.android.span.span
 import org.matrix.android.sdk.api.extensions.orFalse
@@ -53,6 +55,7 @@ class SpaceDirectoryController @Inject constructor(
 ) : TypedEpoxyController<SpaceDirectoryState>() {
 
     interface InteractionListener {
+        fun onFilterQueryChanged(query: String?)
         fun onButtonClick(spaceChildInfo: SpaceChildInfo)
         fun onSpaceChildClick(spaceChildInfo: SpaceChildInfo)
         fun onRoomClick(spaceChildInfo: SpaceChildInfo)
@@ -62,6 +65,7 @@ class SpaceDirectoryController @Inject constructor(
     }
 
     var listener: InteractionListener? = null
+    private val matchFilter = SpaceChildInfoMatchFilter()
 
     override fun buildModels(data: SpaceDirectoryState?) {
         val host = this
@@ -76,7 +80,7 @@ class SpaceDirectoryController @Inject constructor(
             val failure = results.error
             if (failure is Failure.ServerError && failure.error.code == M_UNRECOGNIZED) {
                 genericPillItem {
-                    id("HS no Support")
+                    id("hs_no_support")
                     imageRes(R.drawable.error)
                     tintIcon(false)
                     text(
@@ -132,43 +136,52 @@ class SpaceDirectoryController @Inject constructor(
                     }
                 }
             } else {
-                flattenChildInfo.forEach { info ->
-                    val isSpace = info.roomType == RoomType.SPACE
-                    val isJoined = data?.joinedRoomsIds?.contains(info.childRoomId) == true
-                    val isLoading = data?.changeMembershipStates?.get(info.childRoomId)?.isInProgress() ?: false
-                    val error = (data?.changeMembershipStates?.get(info.childRoomId) as? ChangeMembershipState.FailedJoining)?.throwable
-                    // if it's known use that matrixItem because it would have a better computed name
-                    val matrixItem = data?.knownRoomSummaries?.find { it.roomId == info.childRoomId }?.toMatrixItem()
-                            ?: info.toMatrixItem()
+                matchFilter.filter = data?.currentFilter ?: ""
+                val filteredChildInfo = flattenChildInfo.filter { matchFilter.test(it) }
 
-                    spaceChildInfoItem {
-                        id(info.childRoomId)
-                        matrixItem(matrixItem)
-                        avatarRenderer(host.avatarRenderer)
-                        topic(info.topic)
-                        suggested(info.suggested.orFalse())
-                        errorLabel(
-                                error?.let {
-                                    host.stringProvider.getString(R.string.error_failed_to_join_room, host.errorFormatter.toHumanReadable(it))
+                if (filteredChildInfo.isEmpty()) {
+                    spaceDirectoryFilterNoResults {
+                        id("no_results")
+                    }
+                } else {
+                    filteredChildInfo.forEach { info ->
+                        val isSpace = info.roomType == RoomType.SPACE
+                        val isJoined = data?.joinedRoomsIds?.contains(info.childRoomId) == true
+                        val isLoading = data?.changeMembershipStates?.get(info.childRoomId)?.isInProgress() ?: false
+                        val error = (data?.changeMembershipStates?.get(info.childRoomId) as? ChangeMembershipState.FailedJoining)?.throwable
+                        // if it's known use that matrixItem because it would have a better computed name
+                        val matrixItem = data?.knownRoomSummaries?.find { it.roomId == info.childRoomId }?.toMatrixItem()
+                                ?: info.toMatrixItem()
+
+                        spaceChildInfoItem {
+                            id(info.childRoomId)
+                            matrixItem(matrixItem)
+                            avatarRenderer(host.avatarRenderer)
+                            topic(info.topic)
+                            suggested(info.suggested.orFalse())
+                            errorLabel(
+                                    error?.let {
+                                        host.stringProvider.getString(R.string.error_failed_to_join_room, host.errorFormatter.toHumanReadable(it))
+                                    }
+                            )
+                            memberCount(info.activeMemberCount ?: 0)
+                            loading(isLoading)
+                            buttonLabel(
+                                    when {
+                                        error != null -> host.stringProvider.getString(R.string.global_retry)
+                                        isJoined      -> host.stringProvider.getString(R.string.action_open)
+                                        else          -> host.stringProvider.getString(R.string.action_join)
+                                    }
+                            )
+                            apply {
+                                if (isSpace) {
+                                    itemClickListener { host.listener?.onSpaceChildClick(info) }
+                                } else {
+                                    itemClickListener { host.listener?.onRoomClick(info) }
                                 }
-                        )
-                        memberCount(info.activeMemberCount ?: 0)
-                        loading(isLoading)
-                        buttonLabel(
-                                when {
-                                    error != null -> host.stringProvider.getString(R.string.global_retry)
-                                    isJoined      -> host.stringProvider.getString(R.string.action_open)
-                                    else          -> host.stringProvider.getString(R.string.action_join)
-                                }
-                        )
-                        apply {
-                            if (isSpace) {
-                                itemClickListener { host.listener?.onSpaceChildClick(info) }
-                            } else {
-                                itemClickListener { host.listener?.onRoomClick(info) }
                             }
+                            buttonClickListener { host.listener?.onButtonClick(info) }
                         }
-                        buttonClickListener { host.listener?.onButtonClick(info) }
                     }
                 }
             }

vector/src/main/java/im/vector/app/features/spaces/explore/SpaceDirectoryFragment.kt

@@ -23,6 +23,7 @@ import android.view.Menu
 import android.view.MenuItem
 import android.view.View
 import android.view.ViewGroup
+import androidx.appcompat.widget.SearchView
 import androidx.core.text.toSpannable
 import androidx.core.view.isVisible
 import androidx.lifecycle.lifecycleScope
@@ -44,7 +45,6 @@ import im.vector.app.core.utils.openUrlInExternalBrowser
 import im.vector.app.databinding.FragmentSpaceDirectoryBinding
 import im.vector.app.features.analytics.plan.MobileScreen
 import im.vector.app.features.home.room.detail.timeline.TimelineEventController
-import im.vector.app.features.matrixto.SpaceCardRenderer
 import im.vector.app.features.permalink.PermalinkHandler
 import im.vector.app.features.spaces.manage.ManageType
 import im.vector.app.features.spaces.manage.SpaceAddRoomSpaceChooserBottomSheet
@@ -63,7 +63,6 @@ data class SpaceDirectoryArgs(
 class SpaceDirectoryFragment @Inject constructor(
         private val epoxyController: SpaceDirectoryController,
         private val permalinkHandler: PermalinkHandler,
-        private val spaceCardRenderer: SpaceCardRenderer,
         private val colorProvider: ColorProvider
 ) : VectorBaseFragment<FragmentSpaceDirectoryBinding>(),
         SpaceDirectoryController.InteractionListener,
@@ -123,9 +122,6 @@ class SpaceDirectoryFragment @Inject constructor(
             }
         }
 
-        views.spaceCard.matrixToCardMainButton.isVisible = false
-        views.spaceCard.matrixToCardSecondaryButton.isVisible = false
-
         // Hide FAB when list is scrolling
         views.spaceDirectoryList.addOnScrollListener(
                 object : RecyclerView.OnScrollListener() {
@@ -167,18 +163,37 @@ class SpaceDirectoryFragment @Inject constructor(
             // it's the root
             toolbar?.setTitle(R.string.space_explore_activity_title)
         } else {
-            toolbar?.title = state.currentRootSummary?.name
+            val spaceName = state.currentRootSummary?.name
                     ?: state.currentRootSummary?.canonicalAlias
-                            ?: getString(R.string.space_explore_activity_title)
+
+            if (spaceName != null) {
+                toolbar?.title = spaceName
+                toolbar?.subtitle = getString(R.string.space_explore_activity_title)
+            } else {
+                toolbar?.title = getString(R.string.space_explore_activity_title)
+            }
         }
 
-        spaceCardRenderer.render(state.currentRootSummary, emptyList(), this, views.spaceCard, showDescription = false)
         views.addOrCreateChatRoomButton.isVisible = state.canAddRooms
     }
 
     override fun onPrepareOptionsMenu(menu: Menu) = withState(viewModel) { state ->
         menu.findItem(R.id.spaceAddRoom)?.isVisible = state.canAddRooms
         menu.findItem(R.id.spaceCreateRoom)?.isVisible = false // Not yet implemented
+
+        menu.findItem(R.id.spaceSearch)?.let { searchItem ->
+            val searchView = searchItem.actionView as SearchView
+            searchView.setOnQueryTextListener(object : SearchView.OnQueryTextListener {
+                override fun onQueryTextSubmit(query: String?): Boolean {
+                    return true
+                }
+
+                override fun onQueryTextChange(newText: String?): Boolean {
+                    onFilterQueryChanged(newText)
+                    return true
+                }
+            })
+        }
         super.onPrepareOptionsMenu(menu)
     }
 
@@ -198,6 +213,10 @@ class SpaceDirectoryFragment @Inject constructor(
         return super.onOptionsItemSelected(item)
     }
 
+    override fun onFilterQueryChanged(query: String?) {
+        viewModel.handle(SpaceDirectoryViewAction.FilterRooms(query))
+    }
+
     override fun onButtonClick(spaceChildInfo: SpaceChildInfo) {
         viewModel.handle(SpaceDirectoryViewAction.JoinOrOpen(spaceChildInfo))
     }

vector/src/main/java/im/vector/app/features/spaces/explore/SpaceDirectoryViewAction.kt

@@ -22,6 +22,7 @@ import org.matrix.android.sdk.api.session.room.model.SpaceChildInfo
 sealed class SpaceDirectoryViewAction : VectorViewModelAction {
     data class ExploreSubSpace(val spaceChildInfo: SpaceChildInfo) : SpaceDirectoryViewAction()
     data class JoinOrOpen(val spaceChildInfo: SpaceChildInfo) : SpaceDirectoryViewAction()
+    data class FilterRooms(val query: String?) : SpaceDirectoryViewAction()
     data class ShowDetails(val spaceChildInfo: SpaceChildInfo) : SpaceDirectoryViewAction()
     data class NavigateToRoom(val roomId: String) : SpaceDirectoryViewAction()
     object CreateNewRoom : SpaceDirectoryViewAction()

vector/src/main/java/im/vector/app/features/spaces/explore/SpaceDirectoryViewModel.kt

@@ -225,9 +225,16 @@ class SpaceDirectoryViewModel @AssistedInject constructor(
                     _viewEvents.post(SpaceDirectoryViewEvents.NavigateToCreateNewRoom(state.currentRootSummary?.roomId ?: initialState.spaceId))
                 }
             }
+            is SpaceDirectoryViewAction.FilterRooms              -> {
+                filter(action.query)
+            }
         }
     }
 
+    private fun filter(query: String?) {
+        setState { copy(currentFilter = query.orEmpty()) }
+    }
+
     private fun handleBack() = withState { state ->
         if (state.hierarchyStack.isEmpty()) {
             _viewEvents.post(SpaceDirectoryViewEvents.Dismiss)

vector/src/main/java/im/vector/app/features/spaces/leave/SpaceLeaveAdvanceViewAction.kt

@@ -21,6 +21,9 @@ import im.vector.app.core.platform.VectorViewModelAction
 sealed class SpaceLeaveAdvanceViewAction : VectorViewModelAction {
     data class ToggleSelection(val roomId: String) : SpaceLeaveAdvanceViewAction()
     data class UpdateFilter(val filter: String) : SpaceLeaveAdvanceViewAction()
+    data class SetFilteringEnabled(val isEnabled: Boolean) : SpaceLeaveAdvanceViewAction()
     object DoLeave : SpaceLeaveAdvanceViewAction()
     object ClearError : SpaceLeaveAdvanceViewAction()
+    object SelectAll : SpaceLeaveAdvanceViewAction()
+    object SelectNone : SpaceLeaveAdvanceViewAction()
 }

vector/src/main/java/im/vector/app/features/spaces/leave/SpaceLeaveAdvanceViewState.kt

@@ -28,8 +28,11 @@ data class SpaceLeaveAdvanceViewState(
         val allChildren: Async<List<RoomSummary>> = Uninitialized,
         val selectedRooms: List<String> = emptyList(),
         val currentFilter: String = "",
-        val leaveState: Async<Unit> = Uninitialized
+        val leaveState: Async<Unit> = Uninitialized,
+        val isFilteringEnabled: Boolean = false,
+        val isLastAdmin: Boolean = false
 ) : MavericksState {
+
     constructor(args: SpaceBottomSheetSettingsArgs) : this(
             spaceId = args.spaceId
     )

vector/src/main/java/im/vector/app/features/spaces/leave/SpaceLeaveAdvancedFragment.kt

@@ -18,20 +18,23 @@ package im.vector.app.features.spaces.leave
 
 import android.os.Bundle
 import android.view.LayoutInflater
+import android.view.Menu
+import android.view.MenuItem
 import android.view.View
 import android.view.ViewGroup
-import androidx.lifecycle.lifecycleScope
+import androidx.appcompat.widget.SearchView
+import androidx.coordinatorlayout.widget.CoordinatorLayout
+import androidx.core.view.isVisible
+import com.airbnb.mvrx.Success
 import com.airbnb.mvrx.activityViewModel
 import com.airbnb.mvrx.withState
+import im.vector.app.R
 import im.vector.app.core.extensions.cleanup
 import im.vector.app.core.extensions.configureWith
 import im.vector.app.core.platform.VectorBaseFragment
+import im.vector.app.core.utils.ToggleableAppBarLayoutBehavior
 import im.vector.app.databinding.FragmentSpaceLeaveAdvancedBinding
-import kotlinx.coroutines.flow.debounce
-import kotlinx.coroutines.flow.launchIn
-import kotlinx.coroutines.flow.onEach
 import org.matrix.android.sdk.api.session.room.model.RoomSummary
-import reactivecircus.flowbinding.appcompat.queryTextChanges
 import javax.inject.Inject
 
 class SpaceLeaveAdvancedFragment @Inject constructor(
@@ -44,11 +47,33 @@ class SpaceLeaveAdvancedFragment @Inject constructor(
 
     val viewModel: SpaceLeaveAdvancedViewModel by activityViewModel()
 
+    override fun getMenuRes() = R.menu.menu_space_leave
+
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
         super.onViewCreated(view, savedInstanceState)
-        setupToolbar(views.toolbar)
-                .allowBack()
+
         controller.listener = this
+
+        withState(viewModel) { state ->
+            setupToolbar(views.toolbar)
+                    .setSubtitle(state.spaceSummary?.name)
+                    .allowBack()
+
+            state.spaceSummary?.let { summary ->
+                val warningMessage: CharSequence? = when {
+                    summary.otherMemberIds.isEmpty() -> getString(R.string.space_leave_prompt_msg_only_you)
+                    state.isLastAdmin                -> getString(R.string.space_leave_prompt_msg_as_admin)
+                    !summary.isPublic                -> getString(R.string.space_leave_prompt_msg_private)
+                    else                             -> null
+                }
+
+                views.spaceLeavePromptDescription.isVisible = warningMessage != null
+                views.spaceLeavePromptDescription.text = warningMessage
+            }
+
+            views.spaceLeavePromptTitle.text = getString(R.string.space_leave_prompt_msg_with_name, state.spaceSummary?.name ?: "")
+        }
+
         views.roomList.configureWith(controller)
         views.spaceLeaveCancel.debouncedClicks { requireActivity().finish() }
 
@@ -56,12 +81,23 @@ class SpaceLeaveAdvancedFragment @Inject constructor(
             viewModel.handle(SpaceLeaveAdvanceViewAction.DoLeave)
         }
 
-        views.publicRoomsFilter.queryTextChanges()
-                .debounce(100)
-                .onEach {
-                    viewModel.handle(SpaceLeaveAdvanceViewAction.UpdateFilter(it.toString()))
-                }
-                .launchIn(viewLifecycleOwner.lifecycleScope)
+        views.spaceLeaveSelectGroup.setOnCheckedChangeListener { _, optionId ->
+            when (optionId) {
+                R.id.spaceLeaveSelectAll  -> viewModel.handle(SpaceLeaveAdvanceViewAction.SelectAll)
+                R.id.spaceLeaveSelectNone -> viewModel.handle(SpaceLeaveAdvanceViewAction.SelectNone)
+            }
+        }
+    }
+
+    override fun onPrepareOptionsMenu(menu: Menu) {
+        menu.findItem(R.id.menu_space_leave_search)?.let { searchItem ->
+            searchItem.bind(
+                    onExpanded = { viewModel.handle(SpaceLeaveAdvanceViewAction.SetFilteringEnabled(isEnabled = true)) },
+                    onCollapsed = { viewModel.handle(SpaceLeaveAdvanceViewAction.SetFilteringEnabled(isEnabled = false)) },
+                    onTextChanged = { viewModel.handle(SpaceLeaveAdvanceViewAction.UpdateFilter(it)) }
+            )
+        }
+        super.onPrepareOptionsMenu(menu)
     }
 
     override fun onDestroyView() {
@@ -72,10 +108,63 @@ class SpaceLeaveAdvancedFragment @Inject constructor(
 
     override fun invalidate() = withState(viewModel) { state ->
         super.invalidate()
+
+        if (state.isFilteringEnabled) {
+            views.appBarLayout.setExpanded(false)
+        }
+
+        updateAppBarBehaviorState(state)
+        updateRadioButtonsState(state)
+
         controller.setData(state)
     }
 
     override fun onItemSelected(roomSummary: RoomSummary) {
         viewModel.handle(SpaceLeaveAdvanceViewAction.ToggleSelection(roomSummary.roomId))
     }
+
+    private fun updateAppBarBehaviorState(state: SpaceLeaveAdvanceViewState) {
+        val behavior = (views.appBarLayout.layoutParams as CoordinatorLayout.LayoutParams).behavior as ToggleableAppBarLayoutBehavior
+        behavior.isEnabled = !state.isFilteringEnabled
+    }
+
+    private fun updateRadioButtonsState(state: SpaceLeaveAdvanceViewState) {
+        (state.allChildren as? Success)?.invoke()?.size?.let { allChildrenCount ->
+            when (state.selectedRooms.size) {
+                0                -> views.spaceLeaveSelectNone.isChecked = true
+                allChildrenCount -> views.spaceLeaveSelectAll.isChecked = true
+                else             -> views.spaceLeaveSelectSemi.isChecked = true
+            }
+        }
+    }
+
+    private fun MenuItem.bind(
+            onExpanded: () -> Unit,
+            onCollapsed: () -> Unit,
+            onTextChanged: (String) -> Unit) {
+        setOnActionExpandListener(object : MenuItem.OnActionExpandListener {
+            override fun onMenuItemActionExpand(item: MenuItem?): Boolean {
+                onExpanded()
+                return true
+            }
+
+            override fun onMenuItemActionCollapse(item: MenuItem?): Boolean {
+                onCollapsed()
+                return true
+            }
+        })
+
+        val searchView = actionView as SearchView
+
+        searchView.setOnQueryTextListener(object : SearchView.OnQueryTextListener {
+            override fun onQueryTextSubmit(query: String?): Boolean {
+                return false
+            }
+
+            override fun onQueryTextChange(newText: String?): Boolean {
+                onTextChanged(newText ?: "")
+                return true
+            }
+        })
+    }
 }

vector/src/main/java/im/vector/app/features/spaces/leave/SpaceLeaveAdvancedViewModel.kt

@@ -36,9 +36,14 @@ import okhttp3.internal.toImmutableList
 import org.matrix.android.sdk.api.query.ActiveSpaceFilter
 import org.matrix.android.sdk.api.query.RoomCategoryFilter
 import org.matrix.android.sdk.api.session.Session
+import org.matrix.android.sdk.api.session.events.model.EventType
+import org.matrix.android.sdk.api.session.events.model.toModel
 import org.matrix.android.sdk.api.session.getRoom
-import org.matrix.android.sdk.api.session.getRoomSummary
+import org.matrix.android.sdk.api.session.room.getStateEvent
 import org.matrix.android.sdk.api.session.room.model.Membership
+import org.matrix.android.sdk.api.session.room.model.PowerLevelsContent
+import org.matrix.android.sdk.api.session.room.powerlevels.PowerLevelsHelper
+import org.matrix.android.sdk.api.session.room.powerlevels.Role
 import org.matrix.android.sdk.api.session.room.roomSummaryQueryParams
 import org.matrix.android.sdk.flow.flow
 import org.matrix.android.sdk.flow.unwrap
@@ -50,52 +55,24 @@ class SpaceLeaveAdvancedViewModel @AssistedInject constructor(
         private val appStateHandler: AppStateHandler
 ) : VectorViewModel<SpaceLeaveAdvanceViewState, SpaceLeaveAdvanceViewAction, EmptyViewEvents>(initialState) {
 
-    override fun handle(action: SpaceLeaveAdvanceViewAction) = withState { state ->
-        when (action) {
-            is SpaceLeaveAdvanceViewAction.ToggleSelection -> {
-                val existing = state.selectedRooms.toMutableList()
-                if (existing.contains(action.roomId)) {
-                    existing.remove(action.roomId)
-                } else {
-                    existing.add(action.roomId)
-                }
-                setState {
-                    copy(
-                            selectedRooms = existing.toImmutableList()
-                    )
-                }
-            }
-            is SpaceLeaveAdvanceViewAction.UpdateFilter    -> {
-                setState { copy(currentFilter = action.filter) }
-            }
-            SpaceLeaveAdvanceViewAction.DoLeave            -> {
-                setState { copy(leaveState = Loading()) }
-                viewModelScope.launch {
-                    try {
-                        state.selectedRooms.forEach {
-                            try {
-                                session.roomService().leaveRoom(it)
-                            } catch (failure: Throwable) {
-                                // silently ignore?
-                                Timber.e(failure, "Fail to leave sub rooms/spaces")
-                            }
-                        }
+    init {
+        val space = session.getRoom(initialState.spaceId)
+        val spaceSummary = space?.roomSummary()
 
-                        session.spaceService().leaveSpace(initialState.spaceId)
-                        // We observe the membership and to dismiss when we have remote echo of leaving
-                    } catch (failure: Throwable) {
-                        setState { copy(leaveState = Fail(failure)) }
-                    }
-                }
-            }
-            SpaceLeaveAdvanceViewAction.ClearError         -> {
-                setState { copy(leaveState = Uninitialized) }
+        val powerLevelsEvent = space?.getStateEvent(EventType.STATE_ROOM_POWER_LEVELS)
+        powerLevelsEvent?.content?.toModel<PowerLevelsContent>()?.let { powerLevelsContent ->
+            val powerLevelsHelper = PowerLevelsHelper(powerLevelsContent)
+            val isAdmin = powerLevelsHelper.getUserRole(session.myUserId) is Role.Admin
+            val otherAdminCount = spaceSummary?.otherMemberIds
+                    ?.map { powerLevelsHelper.getUserRole(it) }
+                    ?.count { it is Role.Admin }
+                    ?: 0
+            val isLastAdmin = isAdmin && otherAdminCount == 0
+            setState {
+                copy(isLastAdmin = isLastAdmin)
             }
         }
-    }
 
-    init {
-        val spaceSummary = session.getRoomSummary(initialState.spaceId)
         setState { copy(spaceSummary = spaceSummary) }
         session.getRoom(initialState.spaceId)?.let { room ->
             room.flow().liveRoomSummary()
@@ -127,6 +104,62 @@ class SpaceLeaveAdvancedViewModel @AssistedInject constructor(
         }
     }
 
+    override fun handle(action: SpaceLeaveAdvanceViewAction) {
+        when (action) {
+            is SpaceLeaveAdvanceViewAction.UpdateFilter -> setState { copy(currentFilter = action.filter) }
+            SpaceLeaveAdvanceViewAction.ClearError -> setState { copy(leaveState = Uninitialized) }
+            SpaceLeaveAdvanceViewAction.SelectNone -> setState { copy(selectedRooms = emptyList()) }
+            is SpaceLeaveAdvanceViewAction.SetFilteringEnabled -> setState { copy(isFilteringEnabled = action.isEnabled) }
+            is SpaceLeaveAdvanceViewAction.ToggleSelection -> handleSelectionToggle(action)
+            SpaceLeaveAdvanceViewAction.DoLeave -> handleLeave()
+            SpaceLeaveAdvanceViewAction.SelectAll -> handleSelectAll()
+        }
+    }
+
+    private fun handleSelectAll() = withState { state ->
+        val filteredRooms = (state.allChildren as? Success)?.invoke()?.filter {
+            it.name.contains(state.currentFilter, true)
+        }
+        filteredRooms?.let {
+            setState { copy(selectedRooms = it.map { it.roomId }) }
+        }
+    }
+
+    private fun handleLeave() = withState { state ->
+        setState { copy(leaveState = Loading()) }
+        viewModelScope.launch {
+            try {
+                state.selectedRooms.forEach {
+                    try {
+                        session.roomService().leaveRoom(it)
+                    } catch (failure: Throwable) {
+                        // silently ignore?
+                        Timber.e(failure, "Fail to leave sub rooms/spaces")
+                    }
+                }
+
+                session.spaceService().leaveSpace(initialState.spaceId)
+                // We observe the membership and to dismiss when we have remote echo of leaving
+            } catch (failure: Throwable) {
+                setState { copy(leaveState = Fail(failure)) }
+            }
+        }
+    }
+
+    private fun handleSelectionToggle(action: SpaceLeaveAdvanceViewAction.ToggleSelection) = withState { state ->
+        val existing = state.selectedRooms.toMutableList()
+        if (existing.contains(action.roomId)) {
+            existing.remove(action.roomId)
+        } else {
+            existing.add(action.roomId)
+        }
+        setState {
+            copy(
+                    selectedRooms = existing.toImmutableList(),
+            )
+        }
+    }
+
     @AssistedFactory
     interface Factory : MavericksAssistedViewModelFactory<SpaceLeaveAdvancedViewModel, SpaceLeaveAdvanceViewState> {
         override fun create(initialState: SpaceLeaveAdvanceViewState): SpaceLeaveAdvancedViewModel

vector/src/main/res/layout/bottom_sheet_leave_space.xml

@@ -1,105 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:tools="http://schemas.android.com/tools"
-    android:layout_width="match_parent"
-    android:layout_height="wrap_content"
-    android:background="?android:colorBackground"
-    android:orientation="vertical">
-
-    <TextView
-        android:id="@+id/bottom_leave_space_warning_text"
-        style="@style/Widget.Vector.TextView.Subtitle"
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        android:layout_marginStart="@dimen/layout_horizontal_margin"
-        android:layout_marginTop="20dp"
-        android:layout_marginEnd="@dimen/layout_horizontal_margin"
-        android:layout_marginBottom="8dp"
-        android:textColor="?vctr_content_primary"
-        tools:text="@string/space_leave_prompt_msg_with_name" />
-
-    <RadioGroup
-        android:id="@+id/autoLeaveRadioGroup"
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        android:orientation="vertical"
-        android:paddingStart="?dialogPreferredPadding"
-        android:paddingTop="12dp"
-        android:paddingEnd="?dialogPreferredPadding"
-        android:paddingBottom="12dp">
-
-        <RadioButton
-            android:id="@+id/leave_all"
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:text="@string/leave_all_rooms_and_spaces"
-            tools:checked="true" />
-
-        <RadioButton
-            android:id="@+id/leave_none"
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:minWidth="180dp"
-            android:text="@string/dont_leave_any" />
-
-        <RadioButton
-            android:id="@+id/leave_selected"
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:minWidth="180dp"
-            android:text="@string/leave_specific_ones" />
-
-    </RadioGroup>
-
-    <TextView
-        android:id="@+id/inlineErrorText"
-        style="@style/Widget.Vector.TextView.Body"
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        android:layout_marginStart="@dimen/layout_horizontal_margin"
-        android:layout_marginTop="4dp"
-        android:layout_marginEnd="@dimen/layout_horizontal_margin"
-        android:textColor="?colorError"
-        tools:visibility="visible"
-        tools:text="@string/error_no_network"
-        android:visibility="gone" />
-
-    <FrameLayout
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        android:layout_marginStart="16dp"
-        android:layout_marginTop="20dp"
-        android:layout_marginEnd="16dp">
-
-        <ProgressBar
-            android:id="@+id/leaveProgress"
-            style="?android:attr/progressBarStyle"
-            android:layout_width="40dp"
-            android:layout_height="40dp"
-            android:layout_gravity="center"
-            android:visibility="gone"
-            tools:visibility="visible" />
-
-        <Button
-            android:id="@+id/leaveButton"
-            style="@style/Widget.Vector.Button.Destructive"
-            android:layout_width="match_parent"
-            android:layout_height="56dp"
-            android:layout_gravity="center_horizontal"
-            android:text="@string/leave_space" />
-
-    </FrameLayout>
-
-    <Button
-        android:id="@+id/cancelButton"
-        style="@style/Widget.Vector.Button.Text"
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        android:layout_gravity="center_horizontal"
-        android:layout_marginStart="16dp"
-        android:layout_marginTop="8dp"
-        android:layout_marginEnd="16dp"
-        android:layout_marginBottom="8dp"
-        android:text="@string/action_cancel" />
-
-</LinearLayout>

vector/src/main/res/layout/fragment_space_directory.xml

@@ -11,35 +11,12 @@
         android:layout_width="match_parent"
         android:layout_height="wrap_content">
 
-        <com.google.android.material.appbar.CollapsingToolbarLayout
-            android:id="@+id/spaceExploreCollapsingToolbarLayout"
-            android:layout_width="match_parent"
-            android:layout_height="match_parent"
-            app:contentScrim="?android:colorBackground"
-            app:layout_scrollFlags="scroll|exitUntilCollapsed|snap"
-            app:scrimAnimationDuration="250"
-            app:scrimVisibleHeightTrigger="120dp"
-            app:titleEnabled="false"
-            app:toolbarId="@id/toolbar">
-
-            <FrameLayout
-                android:layout_width="match_parent"
-                android:layout_height="wrap_content"
-                android:layout_marginTop="40dp">
-
-                <include
-                    android:id="@+id/spaceCard"
-                    layout="@layout/fragment_matrix_to_room_space_card" />
-
-            </FrameLayout>
-
             <com.google.android.material.appbar.MaterialToolbar
                 android:id="@+id/toolbar"
                 android:layout_width="match_parent"
-                android:layout_height="wrap_content"
-                app:layout_collapseMode="pin" />
-
-        </com.google.android.material.appbar.CollapsingToolbarLayout>
+                android:layout_height="?attr/actionBarSize"
+                app:contentInsetStart="0dp">
+            </com.google.android.material.appbar.MaterialToolbar>
 
     </com.google.android.material.appbar.AppBarLayout>
 
@@ -57,7 +34,7 @@
         android:layout_height="wrap_content"
         android:layout_gravity="bottom|end"
         android:layout_marginEnd="16dp"
-        android:layout_marginBottom="16dp "
+        android:layout_marginBottom="16dp"
         android:contentDescription="@string/a11y_create_room"
         android:scaleType="center"
         android:src="@drawable/ic_fab_add"

vector/src/main/res/layout/fragment_space_leave_advanced.xml

@@ -16,41 +16,107 @@
         tools:listitem="@layout/item_room_to_add_in_space" />
 
     <com.google.android.material.appbar.AppBarLayout
+        android:id="@+id/appBarLayout"
         android:layout_width="match_parent"
-        android:layout_height="wrap_content">
+        android:layout_height="wrap_content"
+        app:layout_behavior="im.vector.app.core.utils.ToggleableAppBarLayoutBehavior">
 
-        <!-- minHeight="0dp" is important to collapse on scroll -->
-        <com.google.android.material.appbar.MaterialToolbar
-            android:id="@+id/toolbar"
+        <com.google.android.material.appbar.CollapsingToolbarLayout
+            android:id="@+id/spaceExploreCollapsingToolbarLayout"
             android:layout_width="match_parent"
-            android:layout_height="?attr/actionBarSize"
-            android:minHeight="0dp"
-            app:title="@string/pick_tings_to_leave"
-            app:layout_scrollFlags="scroll|exitUntilCollapsed|snap|enterAlways"/>
+            android:layout_height="match_parent"
+            app:contentScrim="?android:colorBackground"
+            app:layout_scrollFlags="scroll|exitUntilCollapsed|enterAlways|snap"
+            app:scrimAnimationDuration="250"
+            app:scrimVisibleHeightTrigger="120dp"
+            app:titleEnabled="false"
+            app:toolbarId="@id/toolbar">
 
-        <androidx.appcompat.widget.SearchView
-            android:id="@+id/publicRoomsFilter"
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:layout_marginTop="8dp"
-            android:layout_marginBottom="8dp"
-            app:layout_constraintBottom_toBottomOf="parent"
-            app:layout_constraintStart_toStartOf="parent"
-            app:layout_constraintTop_toBottomOf="@id/addRoomToSpaceToolbar"
-            app:queryHint="@string/search_hint_room_name" />
+            <androidx.appcompat.widget.LinearLayoutCompat
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="?attr/actionBarSize"
+                android:minHeight="0dp"
+                android:orientation="vertical"
+                android:paddingHorizontal="16dp">
+
+                <TextView
+                    android:id="@+id/spaceLeavePromptTitle"
+                    style="@style/TextAppearance.Vector.Body.Medium"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:layout_marginTop="24dp"
+                    android:text="@string/space_leave_prompt_msg_with_name" />
+
+                <TextView
+                    android:id="@+id/spaceLeavePromptDescription"
+                    style="@style/TextAppearance.Vector.Body"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:text="@string/space_leave_prompt_msg_only_you"
+                    android:textColor="?vctr_content_secondary" />
+
+                <TextView
+                    android:id="@+id/spaceLeaveRadioButtonsTitle"
+                    style="@style/TextAppearance.Vector.Subtitle.Medium"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:layout_marginTop="16dp"
+                    android:text="@string/space_leave_radio_buttons_title"
+                    android:textAllCaps="true"
+                    android:textColor="?vctr_content_primary" />
+
+                <RadioGroup
+                    android:id="@+id/spaceLeaveSelectGroup"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:orientation="horizontal"
+                    android:weightSum="2">
+
+                    <androidx.appcompat.widget.AppCompatRadioButton
+                        android:id="@+id/spaceLeaveSelectAll"
+                        android:layout_width="0dp"
+                        android:layout_height="wrap_content"
+                        android:layout_weight="1"
+                        android:text="@string/space_leave_radio_button_all" />
+
+                    <androidx.appcompat.widget.AppCompatRadioButton
+                        android:id="@+id/spaceLeaveSelectNone"
+                        android:layout_width="0dp"
+                        android:layout_height="wrap_content"
+                        android:layout_weight="1"
+                        android:text="@string/space_leave_radio_button_none" />
+
+                    <!--                    This view should never be visible! There are three possible states but only two buttons by design.-->
+                    <!--                    Third button is needed to make radiogroup work as expected, it's selected, but never shown-->
+                    <androidx.appcompat.widget.AppCompatRadioButton
+                        android:id="@+id/spaceLeaveSelectSemi"
+                        android:layout_width="0dp"
+                        android:layout_height="0dp"
+                        android:visibility="gone" />
+                </RadioGroup>
+
+            </androidx.appcompat.widget.LinearLayoutCompat>
+
+            <com.google.android.material.appbar.MaterialToolbar
+                android:id="@+id/toolbar"
+                android:layout_width="match_parent"
+                android:layout_height="?attr/actionBarSize"
+                app:layout_collapseMode="pin"
+                app:title="Leave space" />
+        </com.google.android.material.appbar.CollapsingToolbarLayout>
 
     </com.google.android.material.appbar.AppBarLayout>
 
     <LinearLayout
-        android:id="@+id/spacePreviewButtonBar"
-        app:layout_behavior="com.google.android.material.behavior.HideBottomViewOnScrollBehavior"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:layout_gravity="bottom"
-        android:background="?vctr_system"
+        android:background="@color/palette_white"
         android:elevation="2dp"
         android:orientation="horizontal"
-        android:padding="8dp">
+        android:padding="8dp"
+        app:layout_behavior="com.google.android.material.behavior.HideBottomViewOnScrollBehavior">
 
         <Button
             android:id="@+id/spaceLeaveCancel"
@@ -68,7 +134,6 @@
             android:layout_height="wrap_content"
             android:layout_weight="1"
             android:text="@string/leave_space" />
-
     </LinearLayout>
 
-</androidx.coordinatorlayout.widget.CoordinatorLayout>
+</androidx.coordinatorlayout.widget.CoordinatorLayout>

vector/src/main/res/layout/item_explore_space_child.xml

@@ -136,8 +136,8 @@
         android:layout_height="1dp"
         android:background="?vctr_list_separator_system"
         app:layout_constraintBottom_toBottomOf="parent"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintEnd_toEndOf="@id/joinSuggestedRoomButton"
+        app:layout_constraintStart_toStartOf="@id/roomNameView"
         app:layout_constraintTop_toBottomOf="@id/inlineErrorText" />
 
 </androidx.constraintlayout.widget.ConstraintLayout>

vector/src/main/res/layout/item_space_directory_filter_no_results.xml

@@ -0,0 +1,36 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.appcompat.widget.LinearLayoutCompat xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/space_explore_rooms_root"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:background="?android:colorBackground"
+    android:foreground="?attr/selectableItemBackground"
+    android:orientation="vertical"
+    android:paddingHorizontal="32dp"
+    android:paddingTop="16dp"
+    tools:viewBindingIgnore="true">
+
+    <TextView
+        style="@style/Widget.Vector.TextView.Body.Medium"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="@string/space_explore_filter_no_result_title" />
+
+    <TextView
+        style="@style/Widget.Vector.TextView.Body"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="8dp"
+        android:text="@string/space_explore_filter_no_result_description"
+        android:textColor="?vctr_content_secondary" />
+
+    <TextView
+        style="@style/Widget.Vector.TextView.Body.Medium"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="16dp"
+        android:text="@string/create_new_room"
+        android:textColor="?colorSecondary" />
+
+</androidx.appcompat.widget.LinearLayoutCompat>

vector/src/main/res/menu/menu_space_directory.xml

@@ -1,6 +1,16 @@
 <?xml version="1.0" encoding="utf-8"?>
-<menu xmlns:android="http://schemas.android.com/apk/res/android"
+<menu
+    xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto">
+
+    <item
+        android:id="@+id/spaceSearch"
+        android:icon="@drawable/ic_filter"
+        android:title="@string/search"
+        app:searchIcon="@drawable/ic_filter"
+        app:actionViewClass="androidx.appcompat.widget.SearchView"
+        app:showAsAction="ifRoom|collapseActionView" />
+
     <item
         android:id="@+id/spaceAddRoom"
         android:title="@string/space_add_existing_rooms"

vector/src/main/res/menu/menu_space_leave.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+<menu xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto">
+
+    <item
+        android:id="@+id/menu_space_leave_search"
+        android:icon="@drawable/ic_filter"
+        android:title="@string/search"
+        app:actionViewClass="androidx.appcompat.widget.SearchView"
+        app:searchIcon="@drawable/ic_filter"
+        app:showAsAction="ifRoom|collapseActionView" />
+
+</menu>

vector/src/main/res/values/strings.xml

@@ -2837,14 +2837,27 @@
     <string name="space_explore_activity_title">Explore rooms</string>
     <string name="space_add_child_title">Add rooms</string>
     <string name="leave_space">Leave</string>
+
+    <string name="space_leave_radio_buttons_title">Things in this space</string>
+    <string name="space_leave_radio_button_all">Leave all</string>
+    <string name="space_leave_radio_button_none">Leave none</string>
+
     <string name="space_leave_prompt_msg_with_name">Are you sure you want to leave %s?</string>
     <string name="space_leave_prompt_msg_only_you">You are the only person here. If you leave, no one will be able to join in the future, including you.</string>
     <string name="space_leave_prompt_msg_private">You won\'t be able to rejoin unless you are re-invited.</string>
     <string name="space_leave_prompt_msg_as_admin">You\'re the only admin of this space. Leaving it will mean no one has control over it.</string>
-    <string name="leave_all_rooms_and_spaces">Leave all rooms and spaces</string>
-    <string name="dont_leave_any">Don’t leave any rooms and spaces</string>
-    <string name="leave_specific_ones">Leave specific rooms and spaces…</string>
-    <string name="pick_tings_to_leave">Pick things to leave</string>
+
+    <!-- TODO delete -->
+    <string name="leave_all_rooms_and_spaces" tools:ignore="UnusedResources">Leave all rooms and spaces</string>
+    <!-- TODO delete -->
+    <string name="dont_leave_any" tools:ignore="UnusedResources">Don’t leave any rooms and spaces</string>
+    <!-- TODO delete -->
+    <string name="leave_specific_ones" tools:ignore="UnusedResources">Leave specific rooms and spaces…</string>
+    <!-- TODO delete -->
+    <string name="pick_tings_to_leave" tools:ignore="UnusedResources">Pick things to leave</string>
+
+    <string name="space_explore_filter_no_result_title">No results found</string>
+    <string name="space_explore_filter_no_result_description">Some results may be hidden because they’re private and you need an invite to them.</string>
 
     <string name="space_add_existing_rooms">Add existing rooms and space</string>
     <string name="space_add_existing_rooms_only">Add existing rooms</string>