Room list : quickly branch filter room name field

app/src/main/java/im/vector/riotredesign/core/extensions/EditText.kt

@@ -0,0 +1,44 @@
+package im.vector.riotredesign.core.extensions
+
+import android.text.Editable
+import android.text.InputType
+import android.text.TextWatcher
+import android.view.MotionEvent
+import android.view.View
+import android.view.inputmethod.EditorInfo
+import android.widget.EditText
+import im.vector.riotredesign.R
+
+fun EditText.setupAsSearch() {
+    addTextChangedListener(object : TextWatcher {
+        override fun afterTextChanged(editable: Editable?) {
+            val clearIcon = if (editable?.isNotEmpty() == true) R.drawable.ic_clear_white else 0
+            setCompoundDrawablesWithIntrinsicBounds(0, 0, clearIcon, 0)
+        }
+
+        override fun beforeTextChanged(s: CharSequence?, start: Int, count: Int, after: Int) = Unit
+        override fun onTextChanged(s: CharSequence?, start: Int, before: Int, count: Int) = Unit
+    })
+
+    maxLines = 1
+    inputType = InputType.TYPE_CLASS_TEXT
+    imeOptions = EditorInfo.IME_ACTION_SEARCH
+    setOnEditorActionListener { _, actionId, event ->
+        var consumed = false
+        if (actionId == EditorInfo.IME_ACTION_SEARCH) {
+            hideKeyboard()
+            consumed = true
+        }
+        consumed
+    }
+
+    setOnTouchListener(View.OnTouchListener { _, event ->
+        if (event.action == MotionEvent.ACTION_UP) {
+            if (event.rawX >= (this.right - this.compoundPaddingRight)) {
+                text = null
+                return@OnTouchListener true
+            }
+        }
+        return@OnTouchListener false
+    })
+}

app/src/main/java/im/vector/riotredesign/core/extensions/View.kt

@@ -0,0 +1,10 @@
+package im.vector.riotredesign.core.extensions
+
+import android.content.Context
+import android.view.View
+import android.view.inputmethod.InputMethodManager
+
+fun View.hideKeyboard() {
+    val imm = context.getSystemService(Context.INPUT_METHOD_SERVICE) as InputMethodManager
+    imm.hideSoftInputFromWindow(windowToken, 0)
+}

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

@@ -8,4 +8,6 @@ sealed class RoomListActions {
 
     object RoomDisplayed : RoomListActions()
 
+    data class FilterRooms(val roomName: CharSequence? = null) : RoomListActions()
+
 }

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

@@ -1,9 +1,12 @@
 package im.vector.riotredesign.features.home.room.list
 
 import android.os.Bundle
+import android.text.Editable
+import android.text.TextWatcher
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
+import android.view.inputmethod.EditorInfo
 import com.airbnb.mvrx.Fail
 import com.airbnb.mvrx.Incomplete
 import com.airbnb.mvrx.Success
@@ -11,6 +14,8 @@ import com.airbnb.mvrx.activityViewModel
 import im.vector.matrix.android.api.failure.Failure
 import im.vector.matrix.android.api.session.room.model.RoomSummary
 import im.vector.riotredesign.R
+import im.vector.riotredesign.core.extensions.hideKeyboard
+import im.vector.riotredesign.core.extensions.setupAsSearch
 import im.vector.riotredesign.core.platform.RiotFragment
 import im.vector.riotredesign.core.platform.StateView
 import im.vector.riotredesign.features.home.HomeNavigator
@@ -38,6 +43,7 @@ class RoomListFragment : RiotFragment(), RoomSummaryController.Callback {
         roomController = RoomSummaryController(this)
         stateView.contentView = epoxyRecyclerView
         epoxyRecyclerView.setController(roomController)
+        setupFilterView()
         homeViewModel.subscribe { renderState(it) }
     }
 
@@ -70,6 +76,21 @@ class RoomListFragment : RiotFragment(), RoomSummaryController.Callback {
         stateView.state = StateView.State.Error(message)
     }
 
+    private fun setupFilterView() {
+        filterRoomView.setupAsSearch()
+        filterRoomView.addTextChangedListener(object : TextWatcher {
+            override fun afterTextChanged(s: Editable?) = Unit
+
+            override fun beforeTextChanged(s: CharSequence?, start: Int, count: Int, after: Int) = Unit
+
+            override fun onTextChanged(s: CharSequence?, start: Int, before: Int, count: Int) {
+                homeViewModel.accept(RoomListActions.FilterRooms(s))
+            }
+        })
+    }
+
+    // RoomSummaryController.Callback **************************************************************
+
     override fun onRoomSelected(room: RoomSummary) {
         homeViewModel.accept(RoomListActions.SelectRoom(room))
         homeNavigator.openRoomDetail(room.roomId, null)

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

@@ -3,6 +3,7 @@ package im.vector.riotredesign.features.home.room.list
 import arrow.core.Option
 import com.airbnb.mvrx.MvRxViewModelFactory
 import com.airbnb.mvrx.ViewModelContext
+import com.jakewharton.rxrelay2.BehaviorRelay
 import im.vector.matrix.android.api.Matrix
 import im.vector.matrix.android.api.session.Session
 import im.vector.matrix.android.api.session.group.model.GroupSummary
@@ -12,10 +13,12 @@ import im.vector.riotredesign.core.platform.RiotViewModel
 import im.vector.riotredesign.features.home.group.SelectedGroupHolder
 import im.vector.riotredesign.features.home.room.VisibleRoomHolder
 import io.reactivex.Observable
-import io.reactivex.functions.BiFunction
+import io.reactivex.functions.Function3
 import io.reactivex.rxkotlin.subscribeBy
 import org.koin.android.ext.android.get
 
+typealias RoomListFilterName = CharSequence
+
 class RoomListViewModel(initialState: RoomListViewState,
                         private val session: Session,
                         private val selectedGroupHolder: SelectedGroupHolder,
@@ -35,6 +38,9 @@ class RoomListViewModel(initialState: RoomListViewState,
         }
     }
 
+
+    private val roomListFilter = BehaviorRelay.createDefault<Option<RoomListFilterName>>(Option.empty())
+
     init {
         observeRoomSummaries()
         observeVisibleRoom()
@@ -43,6 +49,7 @@ class RoomListViewModel(initialState: RoomListViewState,
     fun accept(action: RoomListActions) {
         when (action) {
             is RoomListActions.SelectRoom  -> handleSelectRoom(action)
+            is RoomListActions.FilterRooms -> handleFilterRooms(action)
         }
     }
 
@@ -54,6 +61,11 @@ class RoomListViewModel(initialState: RoomListViewState,
         }
     }
 
+    private fun handleFilterRooms(action: RoomListActions.FilterRooms) {
+        val optionalFilter = Option.fromNullable(action.roomName)
+        roomListFilter.accept(optionalFilter)
+    }
+
     private fun observeVisibleRoom() {
         visibleRoomHolder.visibleRoom()
                 .subscribeBy {
@@ -63,13 +75,22 @@ class RoomListViewModel(initialState: RoomListViewState,
     }
 
     private fun observeRoomSummaries() {
-        Observable.combineLatest<List<RoomSummary>, Option<GroupSummary>, RoomSummaries>(
+        Observable.combineLatest<List<RoomSummary>, Option<GroupSummary>, Option<RoomListFilterName>, RoomSummaries>(
                 session.rx().liveRoomSummaries(),
                 selectedGroupHolder.selectedGroup(),
-                BiFunction { rooms, selectedGroupOption ->
-                    val selectedGroup = selectedGroupOption.orNull()
+                roomListFilter,
+                Function3 { rooms, selectedGroupOption, filterRoomOption ->
+                    val filterRoom = filterRoomOption.orNull()
+                    val filteredRooms = rooms.filter {
+                        if (filterRoom.isNullOrBlank()) {
+                            true
+                        } else {
+                            it.displayName.contains(other = filterRoom, ignoreCase = true)
+                        }
+                    }
 
-                    val filteredDirectRooms = rooms
+                    val selectedGroup = selectedGroupOption.orNull()
+                    val filteredDirectRooms = filteredRooms
                             .filter { it.isDirect }
                             .filter {
                                 if (selectedGroup == null) {
@@ -81,7 +102,7 @@ class RoomListViewModel(initialState: RoomListViewState,
                                 }
                             }
 
-                    val filteredGroupRooms = rooms
+                    val filteredGroupRooms = filteredRooms
                             .filter { !it.isDirect }
                             .filter {
                                 selectedGroup?.roomIds?.contains(it.roomId) ?: true

app/src/main/res/layout/fragment_room_list.xml

@@ -11,15 +11,16 @@
         android:id="@+id/filterRoomView"
         android:layout_width="0dp"
         android:layout_height="32dp"
-        android:layout_marginBottom="8dp"
-        android:layout_marginEnd="16dp"
         android:layout_marginStart="8dp"
         android:layout_marginTop="8dp"
+        android:layout_marginEnd="16dp"
+        android:layout_marginBottom="8dp"
         android:background="@drawable/bg_search_edit_text"
         android:drawableLeft="@drawable/ic_search_white"
         android:drawablePadding="8dp"
         android:drawableTint="#9fa9ba"
         android:hint="Filter by name..."
+        android:lines="1"
         android:paddingLeft="8dp"
         app:layout_constraintBottom_toTopOf="@+id/stateView"
         app:layout_constraintEnd_toEndOf="parent"
@@ -30,8 +31,8 @@
         android:id="@+id/stateView"
         android:layout_width="0dp"
         android:layout_height="0dp"
-        android:layout_marginBottom="0dp"
         android:layout_marginEnd="0dp"
+        android:layout_marginBottom="0dp"
         app:layout_constraintBottom_toBottomOf="parent"
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintStart_toStartOf="parent"