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Keep chat drafts per conversation and open each at its newest line

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Switching conversations dropped the message being written, and showed
the next one at the scroll position of the last.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
ericek111
2026-09-25 15:12:50 +00:00
parent 70c6eb769c
commit 967fcadf77
1 changed files with 18 additions and 7 deletions
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25
android/app/src/main/java/com/ts3client/android/ui/ChatPane.kt
View File

@@ -27,11 +27,13 @@ import androidx.compose.material3.Text
import androidx.compose.runtime.Composable
import androidx.compose.runtime.LaunchedEffect
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.key
import androidx.compose.runtime.remember
import androidx.compose.runtime.rememberUpdatedState
import androidx.compose.runtime.mutableStateMapOf
import androidx.compose.runtime.saveable.Saver
import androidx.compose.runtime.saveable.rememberSaveable
import androidx.compose.runtime.setValue
import androidx.compose.runtime.snapshots.SnapshotStateMap
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.input.key.Key
@@ -68,17 +70,21 @@ fun ChatPane(
ConversationChip(conversation, conversation.key == selected.key, onSelect, onClose)
}
}
Lines(selected.lines, onLink, Modifier.weight(1f))
var draft by rememberSaveable(selected.key.toString()) { mutableStateOf("") }
// Each conversation opens at its newest line.
key(selected.key) { Lines(selected.lines, onLink, Modifier.weight(1f)) }
// One unsent message per conversation, kept while another one is on screen.
val drafts = rememberSaveable(saver = DraftsSaver) { mutableStateMapOf<String, String>() }
val draftKey = selected.key.toString()
val draft = drafts[draftKey].orEmpty()
val send = {
if (draft.isNotBlank()) {
onSend(draft.trim())
draft = ""
drafts.remove(draftKey)
}
}
Row(Modifier.padding(8.dp), verticalAlignment = Alignment.CenterVertically) {
OutlinedTextField(
draft, { draft = it },
draft, { drafts[draftKey] = it },
Modifier.weight(1f).onPreviewKeyEvent { e ->
// A hardware keyboard's Enter sends, as on the desktop; Shift+Enter starts a new line.
val enter = e.key == Key.Enter && !e.isShiftPressed
@@ -98,6 +104,11 @@ fun ChatPane(
}
}
private val DraftsSaver = Saver<SnapshotStateMap<String, String>, HashMap<String, String>>(
save = { HashMap(it) },
restore = { mutableStateMapOf<String, String>().apply { putAll(it) } },
)
@Composable
private fun ConversationChip(
conversation: Conversation,
@@ -120,7 +131,7 @@ private fun ConversationChip(
/** The conversation's lines, following new ones while the newest is in view. */
@Composable
private fun Lines(lines: List<ChatLine>, onLink: (String) -> Unit, modifier: Modifier) {
val listState = rememberLazyListState()
val listState = rememberLazyListState(initialFirstVisibleItemIndex = (lines.size - 1).coerceAtLeast(0))
val linkColor = MaterialTheme.colorScheme.primary
val link by rememberUpdatedState(onLink)
LaunchedEffect(lines.lastOrNull()?.id) {