Replace the SearchBar by a SearchField in the room select screen

The room select screen was using a SearchBar, with an active mode displaying the search results instead of the room
list. Use a SearchField instead, displayed above the room list, which filters the rooms directly. The account switch
section and the selected rooms are now also displayed while searching.

- Remove isSearchActive from the state, and the ToggleSearchActive event.
- The "No results" message is displayed when the query is not blank and no room matches it.
- The back button now always closes the screen.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

libraries/roomselect/impl/src/main/kotlin/io/element/android/libraries/roomselect/impl/RoomSelectEvent.kt

@@ -13,7 +13,6 @@ import io.element.android.libraries.matrix.ui.model.SelectRoomInfo
 
 sealed interface RoomSelectEvent {
     data class ToggleSelectedRoom(val room: SelectRoomInfo) : RoomSelectEvent
-    data object ToggleSearchActive : RoomSelectEvent
     data class UpdateVisibleRange(val range: IntRange) : RoomSelectEvent
     data object ToggleAccountListExpanded : RoomSelectEvent
     data class SelectAccount(val sessionId: SessionId) : RoomSelectEvent

libraries/roomselect/impl/src/main/kotlin/io/element/android/libraries/roomselect/impl/RoomSelectPresenter.kt

@@ -63,7 +63,6 @@ class RoomSelectPresenter(
     override fun present(): RoomSelectState {
         var selectedRooms by remember { mutableStateOf(persistentListOf<SelectRoomInfo>()) }
         val queryState = rememberTextFieldState()
-        var isSearchActive by remember { mutableStateOf(false) }
         var isAccountListExpanded by remember { mutableStateOf(false) }
         var selectedSessionId by remember { mutableStateOf(initialSessionId) }
         val sessions by remember { sessionStore.sessionsFlow() }.collectAsState(initial = emptyList())
@@ -136,7 +135,7 @@ class RoomSelectPresenter(
             derivedStateOf {
                 when {
                     roomSummaryDetailsList.isNotEmpty() -> SearchBarResultState.Results(roomSummaryDetailsList.toImmutableList())
-                    isSearchActive -> SearchBarResultState.NoResultsFound
+                    queryState.text.isNotBlank() -> SearchBarResultState.NoResultsFound
                     else -> SearchBarResultState.Initial
                 }
             }
@@ -152,7 +151,6 @@ class RoomSelectPresenter(
                         selectedRooms.adding(event.room)
                     }
                 }
-                RoomSelectEvent.ToggleSearchActive -> isSearchActive = !isSearchActive
                 RoomSelectEvent.ToggleAccountListExpanded -> isAccountListExpanded = !isAccountListExpanded
                 is RoomSelectEvent.SelectAccount -> {
                     selectedSessionId = event.sessionId
@@ -172,7 +170,6 @@ class RoomSelectPresenter(
             maxNumberOfRooms = maxNumberOfRooms,
             resultState = searchResults,
             searchQuery = queryState,
-            isSearchActive = isSearchActive,
             selectedRooms = selectedRooms,
             selectedAccount = selectedAccount,
             hasRoomListError = hasRoomListError,

libraries/roomselect/impl/src/main/kotlin/io/element/android/libraries/roomselect/impl/RoomSelectState.kt

@@ -20,7 +20,6 @@ data class RoomSelectState(
     val maxNumberOfRooms: Int,
     val resultState: SearchBarResultState<ImmutableList<SelectRoomInfo>>,
     val searchQuery: TextFieldState,
-    val isSearchActive: Boolean,
     val selectedRooms: ImmutableList<SelectRoomInfo>,
     val selectedAccount: MatrixUser,
     /**

libraries/roomselect/impl/src/main/kotlin/io/element/android/libraries/roomselect/impl/RoomSelectStatePreviewParam.kt

@@ -26,17 +26,15 @@ open class RoomSelectStatePreviewParam : PreviewParameterProvider<RoomSelectStat
     override val values: Sequence<RoomSelectState>
         get() = sequenceOf(
             aRoomSelectState(),
-            aRoomSelectState(searchQuery = "Test", isSearchActive = true),
+            aRoomSelectState(searchQuery = "Test", resultState = SearchBarResultState.NoResultsFound),
             aRoomSelectState(resultState = SearchBarResultState.Results(aRoomSelectRoomList())),
             aRoomSelectState(
                 resultState = SearchBarResultState.Results(aRoomSelectRoomList()),
                 searchQuery = "Test",
-                isSearchActive = true,
             ),
             aRoomSelectState(
                 resultState = SearchBarResultState.Results(aRoomSelectRoomList()),
                 searchQuery = "Test",
-                isSearchActive = true,
                 selectedRooms = aRoomSelectRoomList().subList(0, 1),
             ),
             aRoomSelectState(
@@ -76,7 +74,6 @@ internal fun aRoomSelectState(
     maxNumberOfRooms: Int = 10,
     resultState: SearchBarResultState<ImmutableList<SelectRoomInfo>> = SearchBarResultState.Initial,
     searchQuery: String = "",
-    isSearchActive: Boolean = false,
     selectedRooms: ImmutableList<SelectRoomInfo> = persistentListOf(),
     selectedAccount: MatrixUser = MatrixUser(UserId("@alice:example.org")),
     hasRoomListError: Boolean = false,
@@ -88,7 +85,6 @@ internal fun aRoomSelectState(
     maxNumberOfRooms = maxNumberOfRooms,
     resultState = resultState,
     searchQuery = TextFieldState(initialText = searchQuery),
-    isSearchActive = isSearchActive,
     selectedRooms = selectedRooms,
     selectedAccount = selectedAccount,
     hasRoomListError = hasRoomListError,

libraries/roomselect/impl/src/main/kotlin/io/element/android/libraries/roomselect/impl/RoomSelectView.kt

@@ -49,6 +49,7 @@ import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.semantics.semantics
 import androidx.compose.ui.semantics.stateDescription
 import androidx.compose.ui.text.font.FontStyle
+import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.text.style.TextOverflow
 import androidx.compose.ui.tooling.preview.PreviewParameter
 import androidx.compose.ui.unit.dp
@@ -70,8 +71,8 @@ import io.element.android.libraries.designsystem.theme.components.Icon
 import io.element.android.libraries.designsystem.theme.components.ListItem
 import io.element.android.libraries.designsystem.theme.components.ListSectionHeader
 import io.element.android.libraries.designsystem.theme.components.Scaffold
-import io.element.android.libraries.designsystem.theme.components.SearchBar
 import io.element.android.libraries.designsystem.theme.components.SearchBarResultState
+import io.element.android.libraries.designsystem.theme.components.SearchField
 import io.element.android.libraries.designsystem.theme.components.Text
 import io.element.android.libraries.designsystem.theme.components.TextButton
 import io.element.android.libraries.designsystem.theme.components.TopAppBar
@@ -123,10 +124,8 @@ fun RoomSelectView(
     }
 
     var canHandleBack by remember { mutableStateOf(true) }
-    fun onBackButton(state: RoomSelectState) {
+    fun onBackButton() {
-        if (state.isSearchActive) {
+        if (canHandleBack) {
-            state.eventSink(RoomSelectEvent.ToggleSearchActive)
-        } else if (canHandleBack) {
             canHandleBack = false
             onDismiss()
         }
@@ -134,7 +133,7 @@ fun RoomSelectView(
 
     BackHandler(
         enabled = canHandleBack,
-        onBack = { onBackButton(state) }
+        onBack = ::onBackButton,
     )
 
     // Use a new list state when the selected account changes, so that the list of rooms is scrolled to the top
@@ -159,7 +158,7 @@ fun RoomSelectView(
                 navigationIcon = {
                     BackButton(
                         enabled = canHandleBack,
-                        onClick = { onBackButton(state) }
+                        onClick = ::onBackButton,
                     )
                 },
                 actions = {
@@ -179,62 +178,27 @@ fun RoomSelectView(
                 .consumeWindowInsets(paddingValues)
                 .then(
                     // Only when the account switch section is displayed, else its unknown height would consume all the scroll events
-                    if (state.showAccountSwitch && !state.isSearchActive) {
+                    if (state.showAccountSwitch) {
                         Modifier.nestedScroll(accountSwitchScrollBehavior.nestedScrollConnection)
                     } else {
                         Modifier
                     }
                 )
         ) {
-            SearchBar(
+            SearchField(
+                state = state.searchQuery,
                 modifier = Modifier
                     .fillMaxWidth()
                     .padding(
                         WindowInsets.safeDrawing
                             .only(WindowInsetsSides.Horizontal)
                             .asPaddingValues()
-                    ),
-                placeHolderTitle = stringResource(CommonStrings.action_search),
-                queryState = state.searchQuery,
-                active = state.isSearchActive,
-                onActiveChange = { state.eventSink(RoomSelectEvent.ToggleSearchActive) },
-                resultState = state.resultState,
-                showBackButton = false,
-            ) { summaries ->
-                LazyColumn(
-                    state = lazyListState,
-                    contentPadding = lazyColumnContentPadding,
-                ) {
-                    if (summaries.isNotEmpty()) {
-                        item {
-                            ListSectionHeader(
-                                title = stringResource(CommonStrings.common_header_rooms),
-                                hasDivider = false,
                     )
-                        }
+                    .padding(horizontal = 16.dp, vertical = 8.dp),
-                    }
+                placeholder = stringResource(CommonStrings.action_search),
-                    item {
-                        SelectedRoomsHelper(
-                            selectedRooms = state.selectedRooms,
-                            showVerticalSpace = false,
             )
-                    }
-                    items(summaries, key = { it.roomId.value }) { roomSummary ->
-                        RoomSummaryView(
-                            roomSummary,
-                            isSelected = state.selectedRooms.any { it.roomId == roomSummary.roomId },
-                            onSelection = { roomSummary ->
-                                state.eventSink(RoomSelectEvent.ToggleSelectedRoom(roomSummary))
-                            },
-                            canBeSelected = state.canSelectMoreRooms,
-                        )
-                    }
-                }
-            }
-
-            if (!state.isSearchActive) {
             if (state.showAccountSwitch) {
-                    // Keep this space outside the collapsing section, so that the section does not touch the search bar when it is collapsing
+                // Keep this space outside the collapsing section, so that the section does not touch the search field when it is collapsing
                 Spacer(modifier = Modifier.height(8.dp))
                 TopAppBarScrollBehaviorLayout(scrollBehavior = accountSwitchScrollBehavior) {
                     AccountSwitchSection(
@@ -251,9 +215,10 @@ fun RoomSelectView(
                 // showVerticalSpace only if there is no other accounts
                 showVerticalSpace = !state.showAccountSwitch,
             )
-                if (state.hasRoomListError) {
+            when {
-                    RoomListError()
+                state.hasRoomListError -> RoomListError()
-                } else if (state.resultState is SearchBarResultState.Results) {
+                state.resultState is SearchBarResultState.NoResultsFound -> NoResultsFound()
+                state.resultState is SearchBarResultState.Results -> {
                     LazyColumn(
                         state = lazyListState,
                         contentPadding = lazyColumnContentPadding,
@@ -278,11 +243,24 @@ fun RoomSelectView(
                         }
                     }
                 }
+                else -> Unit
             }
         }
     }
 }
 
+@Composable
+private fun NoResultsFound() {
+    Text(
+        text = stringResource(CommonStrings.common_no_results),
+        textAlign = TextAlign.Center,
+        color = ElementTheme.colors.textSecondary,
+        modifier = Modifier
+            .fillMaxWidth()
+            .padding(horizontal = 16.dp, vertical = 80.dp),
+    )
+}
+
 @Composable
 private fun RoomListError() {
     IconTitleSubtitleMolecule(

libraries/roomselect/impl/src/test/kotlin/io/element/android/libraries/roomselect/impl/RoomSelectPresenterTest.kt

@@ -59,7 +59,6 @@ class RoomSelectPresenterTest {
             val initialState = awaitItem()
             assertThat(initialState.selectedRooms).isEmpty()
             assertThat(initialState.resultState).isInstanceOf(SearchBarResultState.Initial::class.java)
-            assertThat(initialState.isSearchActive).isFalse()
             assertThat(initialState.maxNumberOfRooms).isEqualTo(10)
             assertThat(initialState.canSelectMoreRooms).isTrue()
             assertThat(initialState.selectedAccount).isEqualTo(MatrixUser(A_SESSION_ID))
@@ -284,18 +283,6 @@ class RoomSelectPresenterTest {
         ),
     )
 
-    @Test
-    fun `present - toggle search active`() = runTest {
-        val presenter = createRoomSelectPresenter()
-        presenter.test {
-            val initialState = awaitItem()
-            initialState.eventSink(RoomSelectEvent.ToggleSearchActive)
-            assertThat(awaitItem().isSearchActive).isTrue()
-            initialState.eventSink(RoomSelectEvent.ToggleSearchActive)
-            assertThat(awaitItem().isSearchActive).isFalse()
-        }
-    }
-
     @Test
     fun `present - update query`() = runTest {
         val roomSummary = aRoomSummary()
@@ -314,8 +301,6 @@ class RoomSelectPresenterTest {
             // Do not compare the lambda because they will be different. So copy the lambda from expectedRoomSummary to result
             val result = (awaitItem().resultState as SearchBarResultState.Results).results
             assertThat(result).isEqualTo(listOf(expectedRoomInfo))
-            initialState.eventSink(RoomSelectEvent.ToggleSearchActive)
-            skipItems(1)
             initialState.searchQuery.setTextAndPlaceCursorAtEnd("string not contained")
             assertThat(
                 roomList.currentFilter.value

libraries/roomselect/impl/src/test/kotlin/io/element/android/libraries/roomselect/impl/RoomSelectViewTest.kt

@@ -155,6 +155,17 @@ class RoomSelectViewTest : RobolectricTest() {
         onNodeWithText("Room 0").assertIsNotDisplayed()
     }
 
+    @Test
+    fun `a message is displayed when no room matches the search query`() = runAndroidComposeUiTest {
+        setRoomSelectView(
+            aRoomSelectState(
+                searchQuery = "Test",
+                resultState = SearchBarResultState.NoResultsFound,
+            ),
+        )
+        onNodeWithText(activity!!.getString(CommonStrings.common_no_results)).assertIsDisplayed()
+    }
+
     @Test
     fun `an error is displayed instead of the rooms if they cannot be loaded`() = runAndroidComposeUiTest<ComponentActivity> {
         setRoomSelectView(