fix: replace compose cursor position code with view

Signed-off-by: Infi <infi@infi.sh>

app/src/main/java/chat/revolt/components/chat/NativeMessageField.kt

@@ -78,7 +78,8 @@ fun NativeMessageField(
     disabled: Boolean = false,
     editMode: Boolean = false,
     cancelEdit: () -> Unit = {},
-    onFocusChange: (Boolean) -> Unit = {}
+    onFocusChange: (Boolean) -> Unit = {},
+    onSelectionChange: (Pair<Int, Int>) -> Unit = {}
 ) {
     val placeholderResource = when (channelType) {
         ChannelType.DirectMessage -> R.string.message_field_placeholder_dm
@@ -155,6 +156,11 @@ fun NativeMessageField(
                         }
                         return ic
                     }
+
+                    override fun onSelectionChanged(selStart: Int, selEnd: Int) {
+                        super.onSelectionChanged(selStart, selEnd)
+                        onSelectionChange(selStart to selEnd)
+                    }
                 }.apply {
                     background = null
                     textSize = 16f
@@ -319,6 +325,7 @@ fun NativeMessageFieldPreview() {
         disabled = false,
         editMode = false,
         cancelEdit = {},
-        onFocusChange = {}
+        onFocusChange = {},
+        onSelectionChange = {}
     )
 }

app/src/main/java/chat/revolt/screens/chat/views/channel/ChannelScreen.kt

@@ -57,7 +57,6 @@ import androidx.compose.ui.graphics.toArgb
 import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.platform.LocalFocusManager
 import androidx.compose.ui.res.stringResource
-import androidx.compose.ui.text.input.TextFieldValue
 import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.unit.dp
 import androidx.documentfile.provider.DocumentFile
@@ -91,10 +90,10 @@ import chat.revolt.sheets.ChannelInfoSheet
 import chat.revolt.sheets.MessageContextSheet
 import com.discord.simpleast.core.simple.SimpleMarkdownRules
 import com.discord.simpleast.core.simple.SimpleRenderer
-import java.io.File
-import java.io.FileNotFoundException
 import kotlinx.coroutines.flow.distinctUntilChanged
 import kotlinx.coroutines.launch
+import java.io.File
+import java.io.FileNotFoundException
 
 @OptIn(ExperimentalMaterial3Api::class)
 @Composable
@@ -180,13 +179,6 @@ fun ChannelScreen(
         label = "ScrollDownFABPadding"
     )
 
-    val fieldContent = remember(viewModel.pendingMessageContent, viewModel.textSelection) {
-        TextFieldValue(
-            viewModel.pendingMessageContent,
-            viewModel.textSelection
-        )
-    }
-
     LaunchedEffect(channelId) {
         viewModel.activeChannelId = channelId
         viewModel.fetchChannel(channelId)
@@ -479,7 +471,7 @@ fun ChannelScreen(
                     )
                 } else {
                     NativeMessageField(
-                        value = fieldContent.text,
+                        value = viewModel.pendingMessageContent,
                         onValueChange = {
                             viewModel.pendingMessageContent = it
                             // viewModel.textSelection = it.selection
@@ -528,6 +520,9 @@ fun ChannelScreen(
                             if (nowFocused && viewModel.currentBottomPane != BottomPane.None) {
                                 viewModel.currentBottomPane = BottomPane.None
                             }
+                        },
+                        onSelectionChange = {
+                            viewModel.textSelection = it
                         }
                     )
                 }

app/src/main/java/chat/revolt/screens/chat/views/channel/ChannelScreenViewModel.kt

@@ -8,7 +8,6 @@ import androidx.compose.runtime.mutableStateListOf
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.setValue
 import androidx.compose.runtime.toMutableStateList
-import androidx.compose.ui.text.TextRange
 import androidx.lifecycle.ViewModel
 import androidx.lifecycle.viewModelScope
 import chat.revolt.R
@@ -71,7 +70,7 @@ class ChannelScreenViewModel : ViewModel() {
     var hasNoMoreMessages by mutableStateOf(false)
 
     var pendingMessageContent by mutableStateOf("")
-    var textSelection by mutableStateOf(TextRange(0))
+    var textSelection by mutableStateOf(0 to 0)
     var pendingReplies = mutableStateListOf<SendMessageReply>()
     var pendingAttachments = mutableStateListOf<FileArgs>()
 
@@ -404,7 +403,8 @@ class ChannelScreenViewModel : ViewModel() {
                             msg.id == it.messageId
                         } ?: return@onEach
                         pendingMessageContent = message.content ?: ""
-                        textSelection = TextRange(message.content?.length ?: 0)
+                        textSelection =
+                            (message.content?.length ?: 0) to (message.content?.length ?: 0)
                     }
                 }
             }.catch {
@@ -456,18 +456,20 @@ class ChannelScreenViewModel : ViewModel() {
         val currentSelection = textSelection
 
         // if out of bounds, just append
-        if (currentSelection.start > currentContent.length) {
+        if (currentSelection.first > currentContent.length) {
             pendingMessageContent = currentContent + content
-            textSelection = TextRange(currentContent.length + content.length)
+            textSelection =
+                currentSelection.first + content.length to currentSelection.first + content.length
             return
         }
 
-        val newContent = currentContent.substring(0, currentSelection.start) +
+        val newContent = currentContent.substring(0, currentSelection.first) +
                 content +
-                currentContent.substring(currentSelection.end)
+                currentContent.substring(currentSelection.second)
 
         pendingMessageContent = newContent
-        textSelection = TextRange(currentSelection.start + content.length)
+        textSelection =
+            currentSelection.first + content.length to currentSelection.first + content.length
     }
 
     suspend fun checkShouldDenyMessageField() {