Fix for message composer losing focus in Compose 1.8.0 (#4853)

Co-authored-by: ElementBot <android@element.io>

features/messages/impl/src/main/kotlin/io/element/android/features/messages/impl/ExpandableBottomSheetScaffold.kt

@@ -10,7 +10,10 @@
 package io.element.android.features.messages.impl
 
 import androidx.compose.foundation.layout.PaddingValues
+import androidx.compose.foundation.layout.WindowInsets
 import androidx.compose.foundation.layout.fillMaxHeight
+import androidx.compose.foundation.layout.ime
+import androidx.compose.foundation.layout.windowInsetsPadding
 import androidx.compose.material3.ExperimentalMaterial3Api
 import androidx.compose.material3.SheetValue
 import androidx.compose.material3.rememberBottomSheetScaffoldState
@@ -112,7 +115,7 @@ internal fun ExpandableBottomSheetScaffold(
     }
 
     SubcomposeLayout(
-        modifier = modifier,
+        modifier = modifier.windowInsetsPadding(WindowInsets.ime),
         measurePolicy = { constraints: Constraints ->
             val sheetContentSub = subcompose(Slot.SheetContent(sheetContentKey)) { sheetContent(true) }.map {
                 it.measure(Constraints(maxWidth = constraints.maxWidth))
@@ -123,7 +126,7 @@ internal fun ExpandableBottomSheetScaffold(
             val dragHandleHeight = dragHandleSub?.height?.toDp() ?: 0.dp
 
             val maxHeight = constraints.maxHeight.toDp()
-            val contentHeight = sheetContentSub.height.toDp() + dragHandleHeight
+            val contentHeight = sheetContentSub.measuredHeight.toDp() + dragHandleHeight
 
             contentOverflows = contentHeight > maxHeight
 
@@ -140,7 +143,7 @@ internal fun ExpandableBottomSheetScaffold(
                         measurePolicy = { measurables, constraints ->
                             val constraintHeight = constraints.maxHeight
                             val offset = tryOrNull { scaffoldState.bottomSheetState.requireOffset() } ?: 0f
-                            val height = Integer.max(0, constraintHeight - offset.roundToInt())
+                            val height = Integer.max(peekHeight.roundToPx(), constraintHeight - offset.roundToInt())
                             val top = measurables[0].measure(
                                 constraints.copy(
                                     minHeight = height,

libraries/androidutils/src/main/kotlin/io/element/android/libraries/androidutils/ui/View.kt

@@ -27,6 +27,11 @@ fun View.showKeyboard(andRequestFocus: Boolean = false) {
     imm?.showSoftInput(this, InputMethodManager.SHOW_IMPLICIT)
 }
 
+fun View.isKeyboardVisible(): Boolean {
+    val imm = context?.getSystemService<InputMethodManager>()
+    return imm?.isAcceptingText == true
+}
+
 suspend fun View.awaitWindowFocus() = suspendCancellableCoroutine { continuation ->
     if (hasWindowFocus()) {
         continuation.resume(Unit)

libraries/textcomposer/impl/src/main/kotlin/io/element/android/libraries/textcomposer/SoftKeyboardEffect.kt

@@ -7,6 +7,8 @@
 
 package io.element.android.libraries.textcomposer
 
+import android.os.Build
+import android.view.WindowInsets
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.getValue
@@ -14,6 +16,7 @@ import androidx.compose.runtime.rememberUpdatedState
 import androidx.compose.ui.platform.LocalView
 import androidx.compose.ui.viewinterop.AndroidView
 import io.element.android.libraries.androidutils.ui.awaitWindowFocus
+import io.element.android.libraries.androidutils.ui.isKeyboardVisible
 import io.element.android.libraries.androidutils.ui.showKeyboard
 
 /**
@@ -40,11 +43,17 @@ internal fun <T> SoftKeyboardEffect(
             // Await window focus in case returning from a dialog
             view.awaitWindowFocus()
 
-            // Show the keyboard, temporarily using the root view for focus
-            view.showKeyboard(andRequestFocus = true)
+            if (!view.isKeyboardVisible()) {
+                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
+                    view.windowInsetsController?.show(WindowInsets.Type.ime())
+                } else {
+                    // Show the keyboard, temporarily using the root view for focus
+                    view.showKeyboard(andRequestFocus = true)
+                }
 
-            // Refocus to the correct view
-            latestOnRequestFocus()
+                // Refocus to the correct view
+                latestOnRequestFocus()
+            }
         }
     }
 }

libraries/textcomposer/impl/src/main/kotlin/io/element/android/libraries/textcomposer/TextComposer.kt

@@ -18,12 +18,14 @@ import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.IntrinsicSize
 import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.WindowInsets
 import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.height
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.requiredHeightIn
 import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.layout.systemBars
 import androidx.compose.foundation.layout.width
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.LaunchedEffect
@@ -35,6 +37,7 @@ import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.draw.clip
+import androidx.compose.ui.platform.LocalDensity
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.text.style.TextOverflow
 import androidx.compose.ui.tooling.preview.Preview
@@ -432,8 +435,9 @@ private fun TextFormattingLayout(
     sendButton: @Composable () -> Unit,
     modifier: Modifier = Modifier
 ) {
+    val bottomPadding = with(LocalDensity.current) { WindowInsets.systemBars.getBottom(this).toDp() + 8.dp }
     Column(
-        modifier = modifier.padding(vertical = 4.dp),
+        modifier = modifier.padding(vertical = 4.dp).padding(bottom = bottomPadding),
         verticalArrangement = Arrangement.spacedBy(4.dp),
     ) {
         if (isRoomEncrypted == false) {

libraries/textcomposer/impl/src/main/kotlin/io/element/android/libraries/textcomposer/components/markdown/MarkdownEditText.kt

@@ -8,7 +8,6 @@
 package io.element.android.libraries.textcomposer.components.markdown
 
 import android.content.Context
-import android.view.View
 import androidx.appcompat.widget.AppCompatEditText
 
 internal class MarkdownEditText(
@@ -37,8 +36,4 @@ internal class MarkdownEditText(
             onSelectionChangeListener?.invoke(selStart, selEnd)
         }
     }
-
-    override fun focusSearch(direction: Int): View? {
-        return null
-    }
 }

libraries/textcomposer/impl/src/main/kotlin/io/element/android/libraries/textcomposer/components/markdown/MarkdownTextInput.kt

@@ -118,6 +118,11 @@ fun MarkdownTextInput(
                         )
                     }
                     state.requestFocusAction = { this.requestFocus() }
+                } else {
+                    isEnabled = false
+                    isFocusable = false
+                    isFocusableInTouchMode = false
+                    isClickable = false
                 }
             }
         },