@@ -1,2100 +0,0 @@
1−@file:Suppress("TooManyFunctions")
3−package soy.iko.opencode.ui.chat
5−import android.app.Activity
6−import android.content.Intent
8−import android.speech.RecognizerIntent
9−import androidx.activity.compose.BackHandler
10−import androidx.activity.compose.rememberLauncherForActivityResult
11−import androidx.activity.result.PickVisualMediaRequest
12−import androidx.activity.result.contract.ActivityResultContracts
13−import androidx.compose.animation.AnimatedVisibility
14−import androidx.compose.foundation.clickable
15−import androidx.compose.foundation.layout.Arrangement
16−import androidx.compose.foundation.layout.Box
17−import androidx.compose.foundation.layout.Column
18−import androidx.compose.foundation.layout.FlowRow
19−import androidx.compose.foundation.layout.PaddingValues
20−import androidx.compose.foundation.layout.Row
21−import androidx.compose.foundation.layout.Spacer
22−import androidx.compose.foundation.layout.WindowInsets
23−import androidx.compose.foundation.layout.fillMaxSize
24−import androidx.compose.foundation.layout.fillMaxWidth
25−import androidx.compose.foundation.layout.imePadding
26−import androidx.compose.foundation.layout.navigationBars
27−import androidx.compose.foundation.layout.padding
28−import androidx.compose.foundation.layout.size
29−import androidx.compose.foundation.layout.union
30−import androidx.compose.foundation.layout.widthIn
31−import androidx.compose.foundation.layout.windowInsetsPadding
32−import androidx.compose.foundation.layout.wrapContentWidth
33−import androidx.compose.foundation.lazy.LazyColumn
34−import androidx.compose.foundation.lazy.items
35−import androidx.compose.foundation.lazy.rememberLazyListState
36−import androidx.compose.material.icons.Icons
37−import androidx.compose.material.icons.automirrored.filled.ArrowBack
38−import androidx.compose.material.icons.automirrored.filled.Send
39−import androidx.compose.material.icons.filled.Add
40−import androidx.compose.material.icons.filled.AutoAwesome
41−import androidx.compose.material.icons.filled.Delete
42−import androidx.compose.material.icons.filled.Description
43−import androidx.compose.material.icons.filled.Edit
44−import androidx.compose.material.icons.filled.Expand
45−import androidx.compose.material.icons.filled.KeyboardArrowDown
46−import androidx.compose.material.icons.filled.KeyboardArrowUp
47−import androidx.compose.material.icons.filled.Mic
48−import androidx.compose.material.icons.filled.MoreVert
49−import androidx.compose.material.icons.filled.PhotoCamera
50−import androidx.compose.material.icons.filled.PhotoLibrary
51−import androidx.compose.material.icons.filled.Refresh
52−import androidx.compose.material.icons.filled.Restore
53−import androidx.compose.material.icons.automirrored.filled.PlaylistAdd
54−import androidx.compose.material.icons.automirrored.filled.Reply
55−import androidx.compose.material.icons.filled.Schedule
56−import androidx.compose.material.icons.filled.Stop
57−import androidx.compose.material3.AlertDialog
58−import androidx.compose.material3.Badge
59−import androidx.compose.material3.BadgedBox
60−import androidx.compose.material3.Button
61−import androidx.compose.material3.CircularProgressIndicator
62−import androidx.compose.material3.SmallFloatingActionButton
63−import androidx.compose.material3.DropdownMenu
64−import androidx.compose.material3.DropdownMenuItem
65−import androidx.compose.material3.ExperimentalMaterial3Api
66−import androidx.compose.material3.ExtendedFloatingActionButton
67−import androidx.compose.material3.FloatingActionButton
68−import androidx.compose.material3.Icon
69−import androidx.compose.material3.IconButton
70−import androidx.compose.material3.MaterialTheme
71−import androidx.compose.material3.OutlinedTextField
72−import androidx.compose.material3.Scaffold
73−import androidx.compose.material3.SnackbarDuration
74−import androidx.compose.material3.SwipeToDismissBox
75−import androidx.compose.material3.SwipeToDismissBoxValue
76−import androidx.compose.material3.rememberSwipeToDismissBoxState
77−import androidx.compose.material3.SnackbarHost
78−import androidx.compose.material3.SnackbarHostState
79−import androidx.compose.material3.SnackbarResult
80−import androidx.compose.material3.Surface
81−import androidx.compose.material3.Text
82−import androidx.compose.material3.TextButton
83−import androidx.compose.material3.TopAppBar
84−import androidx.compose.material3.pulltorefresh.PullToRefreshBox
85−import androidx.compose.runtime.Composable
86−import androidx.compose.runtime.CompositionLocalProvider
87−import androidx.compose.runtime.DisposableEffect
88−import androidx.compose.runtime.LaunchedEffect
89−import androidx.compose.runtime.derivedStateOf
90−import androidx.compose.runtime.getValue
91−import androidx.compose.runtime.mutableIntStateOf
92−import androidx.compose.runtime.mutableStateOf
93−import androidx.compose.runtime.remember
94−import androidx.compose.runtime.rememberCoroutineScope
95−import androidx.compose.runtime.rememberUpdatedState
96−import androidx.compose.runtime.saveable.rememberSaveable
97−import androidx.compose.runtime.setValue
98−import androidx.compose.runtime.snapshotFlow
99−import androidx.compose.foundation.text.KeyboardActions
100−import androidx.compose.foundation.text.KeyboardOptions
101−import androidx.compose.ui.text.input.KeyboardCapitalization
102−import androidx.compose.ui.Alignment
103−import androidx.compose.ui.Modifier
104−import androidx.compose.ui.focus.focusRequester
105−import androidx.compose.ui.input.key.Key
106−import androidx.compose.ui.input.key.KeyEventType
107−import androidx.compose.ui.input.key.isCtrlPressed
108−import androidx.compose.ui.input.key.isShiftPressed
109−import androidx.compose.ui.input.key.key
110−import androidx.compose.ui.input.key.onPreviewKeyEvent
111−import androidx.compose.ui.input.key.type
112−import androidx.compose.ui.layout.onSizeChanged
113−import androidx.compose.ui.platform.LocalContext
114−import androidx.compose.ui.platform.LocalDensity
115−import androidx.compose.ui.platform.LocalHapticFeedback
116−import androidx.compose.ui.platform.LocalView
117−import androidx.compose.ui.platform.testTag
118−import androidx.compose.ui.res.stringResource
119−import androidx.compose.ui.semantics.Role
120−import androidx.compose.ui.semantics.contentDescription
121−import androidx.compose.ui.semantics.semantics
122−import androidx.compose.ui.text.input.ImeAction
123−import androidx.compose.ui.text.style.TextOverflow
124−import androidx.compose.ui.unit.dp
125−import androidx.lifecycle.compose.collectAsStateWithLifecycle
126−import androidx.lifecycle.viewmodel.compose.viewModel
127−import kotlinx.coroutines.Dispatchers
128−import kotlinx.coroutines.coroutineScope
129−import kotlinx.coroutines.delay
130−import kotlinx.coroutines.flow.distinctUntilChanged
131−import kotlinx.coroutines.launch
132−import kotlinx.coroutines.withContext
133−import soy.iko.opencode.data.model.Part
134−import soy.iko.opencode.data.model.MessageWithParts
135−import soy.iko.opencode.data.model.ReasoningPart
136−import soy.iko.opencode.data.model.TextPart
137−import soy.iko.opencode.data.model.ToolCompleted
138−import soy.iko.opencode.data.model.ToolError
139−import soy.iko.opencode.data.model.ToolPart
140−import soy.iko.opencode.data.model.ToolRunning
141−import soy.iko.opencode.data.network.EventStreamClient
142−import soy.iko.opencode.data.network.NetworkConfig
143−import soy.iko.opencode.di.AppContainer
144−import soy.iko.opencode.R
145−import soy.iko.opencode.ui.components.CommandPalette
146−import soy.iko.opencode.ui.components.ConnectionBanner
147−import soy.iko.opencode.ui.components.PaletteAction
148−import soy.iko.opencode.ui.components.LocalReducedMotion
149−import soy.iko.opencode.ui.components.copyToClipboard
150−import soy.iko.opencode.ui.components.LocalRelativeTimeTick
151−import soy.iko.opencode.ui.components.rememberRelativeTimeTick
152−import soy.iko.opencode.ui.components.rememberVisibilityTransitions
153−import soy.iko.opencode.ui.components.showToast
154−import soy.iko.opencode.ui.components.toImageContext
155−import soy.iko.opencode.ui.vmFactory
156−import soy.iko.opencode.util.runCatchingCancellable
158−@OptIn(ExperimentalMaterial3Api::class)
161− container: AppContainer,
164− onOpenFile: ((String) -> Unit)? = null,
165− onOpenSession: ((String) -> Unit)? = null,
167− val vm: ChatViewModel = viewModel(key = sessionId, factory = vmFactory { ChatViewModel(container, sessionId) })
168− val hasMessages by vm.hasMessages.collectAsStateWithLifecycle()
169− val running by vm.running.collectAsStateWithLifecycle()
170− val aborting by vm.aborting.collectAsStateWithLifecycle()
171− val loading by vm.loading.collectAsStateWithLifecycle()
172− val loadError by vm.loadError.collectAsStateWithLifecycle()
173− val refreshing by vm.refreshing.collectAsStateWithLifecycle()
174− val models by vm.models.collectAsStateWithLifecycle()
175− val modelsLoading by vm.modelsLoading.collectAsStateWithLifecycle()
176− val modelsError by vm.modelsError.collectAsStateWithLifecycle()
177− val selectedModel by vm.selectedModel.collectAsStateWithLifecycle()
178− val connectionState by vm.connectionState.collectAsStateWithLifecycle()
179− val pendingPermission by vm.pendingPermission.collectAsStateWithLifecycle()
180− val permissionProgress by vm.permissionProgress.collectAsStateWithLifecycle()
181− val agents by vm.agents.collectAsStateWithLifecycle()
182− val agentsLoading by vm.agentsLoading.collectAsStateWithLifecycle()
183− val agentsError by vm.agentsError.collectAsStateWithLifecycle()
184− val selectedAgent by vm.selectedAgent.collectAsStateWithLifecycle()
185− val commands by vm.commands.collectAsStateWithLifecycle()
186− val commandsLoading by vm.commandsLoading.collectAsStateWithLifecycle()
187− val commandsError by vm.commandsError.collectAsStateWithLifecycle()
188− val sessionTitle by vm.sessionTitle.collectAsStateWithLifecycle()
189− val sessionDeleted by vm.sessionDeleted.collectAsStateWithLifecycle()
190− val draft by vm.draft.collectAsStateWithLifecycle()
191− val attachments by vm.attachments.collectAsStateWithLifecycle()
192− val reverted by vm.reverted.collectAsStateWithLifecycle()
193− val shareUrl by vm.shareUrl.collectAsStateWithLifecycle()
194− val reconnecting by vm.reconnecting.collectAsStateWithLifecycle()
195− val sendOnEnter by container.settingsStore.sendOnEnter.collectAsStateWithLifecycle(initialValue = true)
196− val isOnline by container.isOnline.collectAsStateWithLifecycle()
197− val haptics = LocalHapticFeedback.current
198− val scope = rememberCoroutineScope()
199− val shareContext = LocalContext.current
200− val defaultShareSubject = stringResource(R.string.share_subject)
201− val sessionLabel = stringResource(R.string.session)
202− val defaultModelLabel = stringResource(R.string.default_model)
203− val subtitle = remember(selectedModel?.modelLabel, selectedAgent, defaultModelLabel) {
205− append(selectedModel?.modelLabel ?: defaultModelLabel)
206− selectedAgent?.let { append(" · $it") }
210− // Connection profile (with auth) for rendering inline image attachments.
211− // Collect as state so a server switch recomposes the image context.
212− val activeConnection by container.activeConnection.collectAsStateWithLifecycle()
213− val imageContext = remember(activeConnection?.profile) {
214− activeConnection?.profile?.toImageContext()
217− // Mark this session as read while the user is viewing it; clear on leave so new
218− // background activity can badge it again.
219− DisposableEffect(sessionId) {
220− container.setCurrentSession(sessionId)
221− onDispose { if (container.currentSession.value == sessionId) container.setCurrentSession(null) }
224− // Navigate away when the session is deleted via SSE so the user isn't left
225− // on a zombie screen showing a conversation that no longer exists. Surface a
226− // toast (not a snackbar) because the screen is about to be popped — a snackbar
227− // would be torn down before the user could read it, while a toast survives.
228− // Covers both SSE-driven deletion (deleted on another device) and a user-
229− // initiated delete from the chat overflow menu (deleteSession in ChatViewModel
230− // sets the same flag on success).
231− val deletedContext = LocalContext.current
232− LaunchedEffect(sessionDeleted) {
233− if (sessionDeleted) {
234− showToast(deletedContext, deletedContext.getString(R.string.session_deleted_chat))
239− val snackbar = remember { SnackbarHostState() }
240− val retryLabel = stringResource(R.string.retry)
241− val inputFocusRequester = remember { androidx.compose.ui.focus.FocusRequester() }
242− var showModelPicker by rememberSaveable { mutableStateOf(false) }
243− var showAgentPicker by rememberSaveable { mutableStateOf(false) }
244− var showTitleMenu by rememberSaveable { mutableStateOf(false) }
245− var showCommandPicker by rememberSaveable { mutableStateOf(false) }
246− var showExitConfirm by rememberSaveable { mutableStateOf(false) }
247− var showStopConfirm by rememberSaveable { mutableStateOf(false) }
248− var showOverflowMenu by rememberSaveable { mutableStateOf(false) }
249− var showRenameDialog by rememberSaveable { mutableStateOf(false) }
250− var showDeleteDialog by rememberSaveable { mutableStateOf(false) }
251− var showShellDialog by rememberSaveable { mutableStateOf(false) }
252− var showPalette by rememberSaveable { mutableStateOf(false) }
253− // Summarize and init (generate AGENTS.md) are irreversible, so a single tap is gated behind
254− // a confirmation dialog (from both the overflow menu and the command palette).
255− var showSummarizeConfirm by rememberSaveable { mutableStateOf(false) }
256− var showInitConfirm by rememberSaveable { mutableStateOf(false) }
258− // Command-palette entries (keyboard-first: Ctrl+K). Labels resolved here so the remembered
259− // action list doesn't need a Composable context. Actions map to the same handlers the
260− // overflow menu drives, so the palette is a keyboard shortcut to them, not a parallel path.
261− val paletteModelLabel = stringResource(R.string.palette_switch_model)
262− val paletteAgentLabel = stringResource(R.string.palette_choose_agent)
263− val paletteCommandLabel = stringResource(R.string.palette_run_command)
264− val paletteSummarizeLabel = stringResource(R.string.palette_summarize)
265− val paletteRenameLabel = stringResource(R.string.rename_session_chat)
266− val paletteShellLabel = stringResource(R.string.run_shell_command)
267− val paletteActions = remember(
268− paletteModelLabel, paletteAgentLabel, paletteCommandLabel,
269− paletteSummarizeLabel, paletteRenameLabel, paletteShellLabel, hasMessages, running,
272− add(PaletteAction("model", paletteModelLabel) { showModelPicker = true })
273− add(PaletteAction("agent", paletteAgentLabel) { showAgentPicker = true })
274− add(PaletteAction("command", paletteCommandLabel) { showCommandPicker = true })
275− if (hasMessages && !running) add(PaletteAction("summarize", paletteSummarizeLabel) { showSummarizeConfirm = true })
276− if (!running) add(PaletteAction("shell", paletteShellLabel) { showShellDialog = true })
277− add(PaletteAction("rename", paletteRenameLabel) { showRenameDialog = true })
281− // Keep the screen awake while the agent is working in *this* session. The foreground
282− // service that holds process priority during a run is managed app-wide off
283− // container.anyRunActive (see OpencodeApp) so it survives navigating away from the chat
284− // mid-run — otherwise leaving the screen would drop priority and Doze could choke the
285− // SSE stream before the completion notification fires.
286− val currentView = LocalView.current
287− val appContext = LocalContext.current.applicationContext
288− DisposableEffect(running) {
289− currentView.keepScreenOn = running
290− onDispose { currentView.keepScreenOn = false }
293− LaunchedEffect(Unit) {
294− vm.errorEvents.collect { event ->
295− // Only a failed *send* is retryable; attaching Retry to any other error (e.g. a
296− // message-load failure) would silently re-submit the last prompt on tap.
297− val result = if (event.retryable) {
298− snackbar.showSnackbar(message = event.message, actionLabel = retryLabel)
300− snackbar.showSnackbar(event.message)
302− if (result == androidx.compose.material3.SnackbarResult.ActionPerformed) vm.retryFailed()
306− // In-place Undo for a user-initiated session delete. The delete is deferred for an undo
307− // window on the container; show the snackbar over the conversation the user is viewing so
308− // they can cancel without being navigated to the session list first. If the window expires
309− // the scheduled delete sets `sessionDeleted` and the effect below navigates away.
310− val undoLabel = stringResource(R.string.undo)
311− val sessionDeletedLabel = stringResource(R.string.session_deleted_chat)
312− LaunchedEffect(Unit) {
313− vm.deleteUndoEvents.collect {
315− val dismisser = launch {
316− delay(NetworkConfig.undoDeleteDelayMs)
317− snackbar.currentSnackbarData?.dismiss()
319− val result = snackbar.showSnackbar(
320− message = sessionDeletedLabel,
321− actionLabel = undoLabel,
322− duration = SnackbarDuration.Indefinite,
325− if (result == SnackbarResult.ActionPerformed) vm.cancelSessionDelete()
330− // --- Attachments, voice, and share-link plumbing ---
331− val attachTooLargeMsg = stringResource(R.string.attachment_too_large)
332− val attachFailedMsg = stringResource(R.string.attachment_failed)
333− val attachLimitMsg = stringResource(R.string.attachment_limit)
334− val noCameraMsg = stringResource(R.string.no_camera_app)
335− val noVoiceMsg = stringResource(R.string.no_voice_app)
336− val voicePrompt = stringResource(R.string.voice_prompt)
337− val linkCopiedMsg = stringResource(R.string.link_copied)
339− // Count of picks currently being read + base64-encoded off the main thread, so the
340− // composer can show a staging placeholder immediately (chips only materialize once done).
341− var stagingCount by remember { mutableStateOf(0) }
343− // Convert each picked Uri to a base64 attachment off the main thread, honoring the
344− // per-prompt count cap and surfacing per-file errors without aborting the batch.
345− fun stageUris(uris: List<Uri>) {
346− if (uris.isEmpty()) return
351− if (vm.attachments.value.size >= NetworkConfig.maxAttachments) {
352− snackbar.showSnackbar(attachLimitMsg)
355− when (val result = uri.toAttachmentResult(appContext)) {
356− is AttachmentResult.Ok -> vm.addAttachment(result.attachment)
357− AttachmentResult.TooLarge -> snackbar.showSnackbar(attachTooLargeMsg)
358− AttachmentResult.Failed -> snackbar.showSnackbar(attachFailedMsg)
367− val photoPicker = rememberLauncherForActivityResult(
368− ActivityResultContracts.PickMultipleVisualMedia(NetworkConfig.maxAttachments),
369− ) { uris -> stageUris(uris) }
371− val filePicker = rememberLauncherForActivityResult(
372− ActivityResultContracts.GetMultipleContents(),
373− ) { uris -> stageUris(uris) }
375− // Uri survives a config change mid-capture so the TakePicture result still resolves.
376− var pendingCaptureUri by rememberSaveable { mutableStateOf<Uri?>(null) }
377− val cameraLauncher = rememberLauncherForActivityResult(
378− ActivityResultContracts.TakePicture(),
380− val uri = pendingCaptureUri
381− pendingCaptureUri = null
382− if (success && uri != null) stageUris(listOf(uri))
385− val voiceLauncher = rememberLauncherForActivityResult(
386− ActivityResultContracts.StartActivityForResult(),
388− if (result.resultCode == Activity.RESULT_OK) {
389− val spoken = result.data
390− ?.getStringArrayListExtra(RecognizerIntent.EXTRA_RESULTS)
392− ?.takeIf { it.isNotBlank() }
393− if (spoken != null) {
394− // Append to the existing draft rather than replacing, so dictation adds to
395− // whatever the user already typed.
396− val current = vm.draft.value
397− val combined = if (current.isBlank()) spoken else "$current $spoken"
398− vm.updateDraft(combined.take(NetworkConfig.maxDraftLengthChars))
403− fun launchCamera() {
404− val uri = newCameraCaptureUri(appContext)
406− scope.launch { snackbar.showSnackbar(attachFailedMsg) }
409− pendingCaptureUri = uri
410− runCatching { cameraLauncher.launch(uri) }
411− .onFailure { pendingCaptureUri = null; scope.launch { snackbar.showSnackbar(noCameraMsg) } }
415− val intent = Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH).apply {
416− putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL, RecognizerIntent.LANGUAGE_MODEL_FREE_FORM)
417− putExtra(RecognizerIntent.EXTRA_PROMPT, voicePrompt)
419− runCatching { voiceLauncher.launch(intent) }
420− .onFailure { scope.launch { snackbar.showSnackbar(noVoiceMsg) } }
423− // A freshly-created share link is copied to the clipboard so the user can paste it right away.
424− LaunchedEffect(Unit) {
425− vm.shareLinkEvents.collect { url ->
426− copyToClipboard(shareContext, shareContext.getString(R.string.clip_label_share), url)
427− snackbar.showSnackbar(linkCopiedMsg)
431− // Navigate to a session freshly branched from a message (branchFrom), once it's created.
432− // Keyed on Unit (like the sibling one-shot collectors above): keying on the onOpenSession
433− // lambda would cancel/restart this collector whenever the lambda's identity changes, risking
434− // a dropped branch-navigation event in the gap.
435− val branchedMsg = stringResource(R.string.branch_created)
436− LaunchedEffect(Unit) {
437− vm.branchEvents.collect { newId ->
438− showToast(shareContext, branchedMsg)
439− onOpenSession?.invoke(newId)
443− // Stage images shared into the app (via the system share sheet) as attachments.
444− // Keyed on pendingSharedMedia (not Unit) so the effect re-fires when new media arrives
445− // while this ChatScreen is already composed — which happens in two-pane mode, where the
446− // detail ChatScreen is persistent (keyed on sessionId) and a LaunchedEffect(Unit) would
447− // only fire on first composition. consumePendingSharedMedia() atomically drains the
448− // pending list (compareAndSet to empty), so re-firing on the now-empty value is a no-op.
449− val pendingSharedMedia by container.pendingSharedMedia.collectAsStateWithLifecycle()
450− LaunchedEffect(pendingSharedMedia) {
451− val shared = container.consumePendingSharedMedia()
452− if (shared.isNotEmpty()) stageUris(shared.map { Uri.parse(it) })
456− if (vm.send(draft)) {
457− // TextHandleMove (a light tick) is semantically right for a send commit;
458− // LongPress is reserved for long-press/swipe gestures.
459− haptics.performHapticFeedback(androidx.compose.ui.hapticfeedback.HapticFeedbackType.TextHandleMove)
463− BackHandler(enabled = running && !showModelPicker && !showAgentPicker && !showCommandPicker) { showExitConfirm = true }
466− // Hardware-keyboard shortcuts (tablets / DeX / Chromebooks): Ctrl+K opens the command
467− // palette; Escape closes it, or stops a run. onPreviewKeyEvent on the Scaffold root sees
468− // events before the focused text field, but only Ctrl+K / Escape are consumed so normal
469− // typing (and the composer's own Enter-to-send handling) is untouched.
470− modifier = Modifier.onPreviewKeyEvent { ev ->
471− if (ev.type != KeyEventType.KeyDown) return@onPreviewKeyEvent false
473− ev.isCtrlPressed && ev.key == Key.K -> { showPalette = true; true }
474− ev.key == Key.Escape && showPalette -> { showPalette = false; true }
475− ev.key == Key.Escape && running && !showStopConfirm && !showExitConfirm -> {
476− showStopConfirm = true; true
484− val changeLabel = stringResource(R.string.change_model_agent)
485− // The subtitle reads "model · agent", so tapping the title offers *both*
486− // — a small menu picks which picker to open. Previously the tap went
487− // straight to the model picker, leaving the agent changeable only via
488− // the overflow menu despite the title implying otherwise.
491− // mergeDescendants so TalkBack reads the title/subtitle Texts as one
492− // node; the click label rides on `clickable` (onClickLabel) instead of
493− // an explicit contentDescription, which would have SUPPRESSED the child
494− // Texts and announced only "Change model and agent".
498− onClickLabel = changeLabel,
499− ) { showTitleMenu = true }
500− .semantics(mergeDescendants = true) {},
501− verticalAlignment = Alignment.CenterVertically,
503− Column(modifier = Modifier.weight(1f, fill = false)) {
504− // maxLines=1 + Ellipsis so a long session title can't wrap and
505− // push the top bar to multiple lines, shifting the whole layout.
507− sessionTitle ?: sessionLabel,
509− overflow = TextOverflow.Ellipsis,
513− style = MaterialTheme.typography.labelSmall,
514− color = MaterialTheme.colorScheme.onSurfaceVariant,
516− overflow = TextOverflow.Ellipsis,
519− // Always show the affordance so the title reads as tappable even when
520− // the model catalog failed to load (models empty). Without it the title
521− // is indistinguishable from plain text and the pickers are effectively
522− // undiscoverable — and the dropdown items already disable themselves
523− // while a catalog is loading or unavailable.
525− Icons.Filled.KeyboardArrowDown,
526− contentDescription = null,
527− tint = MaterialTheme.colorScheme.onSurfaceVariant,
528− modifier = Modifier.size(20.dp),
531− DropdownMenu(expanded = showTitleMenu, onDismissRequest = { showTitleMenu = false }) {
533− text = { Text(stringResource(R.string.palette_switch_model)) },
534− enabled = !modelsLoading || models.isNotEmpty(),
535− onClick = { showTitleMenu = false; showModelPicker = true },
538− text = { Text(stringResource(R.string.palette_choose_agent)) },
539− enabled = !agentsLoading || agents.isNotEmpty(),
540− onClick = { showTitleMenu = false; showAgentPicker = true },
546− IconButton(onClick = {
547− if (running) showExitConfirm = true else onBack()
549− Icon(Icons.AutoMirrored.Filled.ArrowBack, contentDescription = stringResource(R.string.back))
553− // At-a-glance run status in the top bar. When the user is scrolled
554− // up (jump-to-latest FAB visible), the input-bar Stop button and the
555− // trailing "working…" row are off-screen, so a top-bar spinner is the
556− // only signal the agent is still working.
558− val workingLabel = stringResource(R.string.working)
559− CircularProgressIndicator(
560− Modifier.size(18.dp).semantics { contentDescription = workingLabel },
564− // Manual refresh: forces an SSE reconnect, which re-seeds messages
565− // from REST. A recovery path when the stream silently drops and the
566− // auto-reconnect re-seed is slow or fails. Shows a brief spinner as
567− // immediate tap feedback — the SSE reconnect may not visibly change
568− // the connection state when already Connected, so without it the tap
569− // appears to do nothing.
570− val refreshLabel = stringResource(R.string.refresh)
572− onClick = { vm.refreshMessages() },
573− enabled = activeConnection != null && !refreshing,
576− CircularProgressIndicator(
577− Modifier.size(18.dp).semantics { contentDescription = refreshLabel },
581− Icon(Icons.Filled.Refresh, contentDescription = refreshLabel)
584− // Overflow menu consolidates the less-frequent actions (share,
585− // commands, agent, model, rename, delete) so the top bar stays
586− // scannable on narrow phones — previously 5 icons crowded the bar
587− // alongside the back button and tappable title. Catalog-loading
588− // spinners stay inline (next to the overflow) so a load state is
589− // visible without opening the menu.
590− val moreLabel = stringResource(R.string.more)
591− val loadingLabel = stringResource(R.string.loading)
592− val shareLabel = stringResource(R.string.share_conversation)
593− val commandsLabel = stringResource(R.string.commands)
594− val renameLabel = stringResource(R.string.rename_session_chat)
595− val deleteLabel = stringResource(R.string.delete_session_chat)
596− val createShareLabel = stringResource(R.string.create_share_link)
597− val copyShareLabel = stringResource(R.string.copy_share_link)
598− val stopShareLabel = stringResource(R.string.stop_sharing)
599− val summarizeLabel = stringResource(R.string.summarize_conversation)
600− val initLabel = stringResource(R.string.generate_agents_md)
601− val shellLabel = stringResource(R.string.run_shell_command)
603− IconButton(onClick = { showOverflowMenu = true }) {
604− Icon(Icons.Filled.MoreVert, contentDescription = moreLabel)
607− expanded = showOverflowMenu,
608− onDismissRequest = { showOverflowMenu = false },
611− text = { Text(shareLabel) },
612− enabled = hasMessages,
614− showOverflowMenu = false
616− val md = withContext(Dispatchers.Default) {
617− buildConversationMarkdown(vm.messages.value, sessionTitle)
619− val send = android.content.Intent(android.content.Intent.ACTION_SEND).apply {
620− type = "text/markdown"
621− putExtra(android.content.Intent.EXTRA_SUBJECT, sessionTitle ?: defaultShareSubject)
622− putExtra(android.content.Intent.EXTRA_TEXT, md)
624− runCatchingCancellable { shareContext.startActivity(android.content.Intent.createChooser(send, shareLabel)) }
625− .onFailure { showToast(shareContext, shareContext.getString(R.string.no_share_app)) }
630− text = { Text(commandsLabel) },
631− enabled = !commandsLoading || commands.isNotEmpty(),
632− onClick = { showOverflowMenu = false; showCommandPicker = true },
634− androidx.compose.material3.HorizontalDivider()
635− // Session sharing: create a public link, copy an existing one, or revoke it.
636− if (shareUrl == null) {
638− text = { Text(createShareLabel) },
639− enabled = hasMessages,
640− onClick = { showOverflowMenu = false; vm.shareSession() },
644− text = { Text(copyShareLabel) },
646− showOverflowMenu = false
648− copyToClipboard(shareContext, shareContext.getString(R.string.clip_label_share), it)
649− scope.launch { snackbar.showSnackbar(linkCopiedMsg) }
654− text = { Text(stopShareLabel) },
655− onClick = { showOverflowMenu = false; vm.unshareSession() },
659− text = { Text(summarizeLabel) },
660− enabled = hasMessages && !running,
661− onClick = { showOverflowMenu = false; showSummarizeConfirm = true },
664− text = { Text(initLabel) },
666− onClick = { showOverflowMenu = false; showInitConfirm = true },
669− text = { Text(shellLabel) },
671− onClick = { showOverflowMenu = false; showShellDialog = true },
673− androidx.compose.material3.HorizontalDivider()
675− text = { Text(renameLabel) },
676− onClick = { showOverflowMenu = false; showRenameDialog = true },
679− text = { Text(deleteLabel, color = MaterialTheme.colorScheme.error) },
680− onClick = { showOverflowMenu = false; showDeleteDialog = true },
683− // While a catalog is initially loading (empty list + loading flag),
684− // show a tiny inline spinner beside the overflow so the user can see
685− // a load is in progress without opening the menu. Once loaded the
686− // spinner disappears; the menu items are always enabled (tapping a
687− // picker with no items shows the "no models/agents/commands" state).
688− val catalogLoading = (commandsLoading && commands.isEmpty()) ||
689− (agentsLoading && agents.isEmpty()) ||
690− (modelsLoading && models.isEmpty())
691− if (catalogLoading) {
692− CircularProgressIndicator(
694− .align(Alignment.TopEnd)
696− .semantics { contentDescription = loadingLabel },
704− snackbarHost = { SnackbarHost(snackbar) },
706− val queuedFollowUp by vm.queuedFollowUp.collectAsStateWithLifecycle()
707− val todoPlan by vm.todoPlan.collectAsStateWithLifecycle()
708− val queuedOffline by vm.outbox.collectAsStateWithLifecycle()
709− val outboxSending by container.outboxSending.collectAsStateWithLifecycle()
711− // Pinned above the composer so the agent's plan and progress stay visible
712− // while scrolled up mid-run; renders nothing when there's no plan.
713− TodoPlanBar(todoPlan)
714− val bannerMotion = rememberVisibilityTransitions()
717− enter = bannerMotion.enter,
718− exit = bannerMotion.exit,
720− RevertBanner(onUndo = { vm.unrevert() })
723− visible = queuedOffline.isNotEmpty(),
724− enter = bannerMotion.enter,
725− exit = bannerMotion.exit,
728− count = queuedOffline.size,
729− sending = outboxSending,
730− onFlush = { vm.flushQueued() },
731− onDiscard = { vm.discardAllQueued() },
736− onValueChange = vm::updateDraft,
738− aborting = aborting,
739− enabled = activeConnection != null,
740− sendOnEnter = sendOnEnter,
742− onAbort = { showStopConfirm = true },
743− queuedFollowUp = queuedFollowUp,
744− onQueueFollowUp = vm::queueFollowUp,
745− onCancelQueue = { vm.queueFollowUp("") },
746− focusRequester = inputFocusRequester,
747− attachments = attachments,
748− staging = stagingCount > 0,
749− onRemoveAttachment = vm::removeAttachment,
752− PickVisualMediaRequest(ActivityResultContracts.PickVisualMedia.ImageOnly),
755− onPickFile = { filePicker.launch("*/*") },
756− onCamera = { launchCamera() },
757− onVoice = { launchVoice() },
762− // Collect messages inside the content lambda so streaming token updates
763− // recompose only this subtree, not the top bar / input bar / 20+ other
764− // state reads in the ChatScreen body.
765− val messages by vm.messages.collectAsStateWithLifecycle()
766− val optimisticStatuses by vm.optimisticStatuses.collectAsStateWithLifecycle()
767− val listState = rememberLazyListState()
768− val contentScope = rememberCoroutineScope()
769− val timeTick = rememberRelativeTimeTick()
770− // Dismiss the soft keyboard when the user scrolls the message list, a standard Android
771− // chat affordance for reading while the IME is open. Watching isScrollInProgress via
772− // snapshotFlow avoids wiring a nested scroll connection and fires on any scroll gesture.
773− val keyboardController = androidx.compose.ui.platform.LocalSoftwareKeyboardController.current
774− androidx.compose.runtime.LaunchedEffect(listState) {
775− androidx.compose.runtime.snapshotFlow { listState.isScrollInProgress }
776− .distinctUntilChanged()
777− .collect { scrolling -> if (scrolling) keyboardController?.hide() }
778− } // Group messages by day and interleave date separators so a long conversation
779− // has visual "Today"/"Yesterday"/date breaks. Computed once per messages
780− // emission (memoized) so a scroll-induced recomposition doesn't re-scan. Lives
781− // outside the PullToRefreshBox so the auto-scroll effects below can reference
782− // the same list the LazyColumn renders (separators shift the indices vs. the
783− // raw messages list, so scroll targets must be in listItems space).
784− val todayLabel = stringResource(R.string.today)
785− val yesterdayLabel = stringResource(R.string.yesterday)
786− val listItems = remember(messages, todayLabel, yesterdayLabel) {
787− buildMessageListItems(messages, todayLabel, yesterdayLabel)
789− // listItems is a plain (non-snapshot) local, rebuilt each recomposition. The
790− // derivedStateOf and snapshotFlow lambdas below are created once (keyless
791− // remember / LaunchedEffect(Unit)); reading `listItems` directly inside them
792− // would capture the first composition's list — which is empty, since `messages`
793− // starts empty — freezing it forever. That pinned isPinnedToBottom at true and
794− // AutoScrollSignal.size at 0, breaking streaming auto-scroll and the
795− // jump-to-latest FAB. rememberUpdatedState hands those lambdas a stable State
796− // whose value tracks the latest list.
797− val currentListItems by rememberUpdatedState(listItems)
799− // New-content signal for the jump-to-latest FAB: set when content grows while the user
800− // is scrolled away from the bottom, cleared once they return (see the collector below).
801− var hasNewContent by remember { mutableStateOf(false) }
803− val isPinnedToBottom by remember {
805− val lastVisible = listState.layoutInfo.visibleItemsInfo.lastOrNull()?.index ?: -1
806− // When a run is active, the LazyColumn has one trailing "__typing"
807− // item after the last list item. Account for it so "pinned to bottom"
808− // includes the working indicator — otherwise the pin check targets
809− // listItems.lastIndex, the typing row sits just below the viewport,
810− // and the user never sees the progress indicator even when pinned.
811− val items = currentListItems
812− val effectiveLast = if (running) items.size else items.lastIndex
813− lastVisible >= effectiveLast || items.isEmpty()
817− // Jump to the newest message once, when the conversation first loads. Guarded by a
818− // saveable one-shot flag so it doesn't re-fire on recomposition after a config change
819− // (rotation) — rememberLazyListState restores the user's scroll offset, and an
820− // unconditional scrollToItem here would clobber it, snapping them back to the bottom.
821− var didInitialScroll by rememberSaveable { mutableStateOf(false) }
822− LaunchedEffect(listItems.isNotEmpty()) {
823− if (listItems.isNotEmpty() && !didInitialScroll) {
824− // When a run is active the LazyColumn has a trailing "__typing" row at
825− // listItems.size; target it (not listItems.lastIndex) so deep-linking into a
826− // running session lands truly pinned to bottom and streaming auto-scroll engages.
827− listState.scrollToItem(if (running) listItems.size else listItems.lastIndex)
828− didInitialScroll = true
832− // When a run starts, the LazyColumn gains a trailing "__typing" row, so
833− // effectiveLast jumps from listItems.lastIndex to listItems.size and the
834− // isPinnedToBottom check flips to false the instant you send — freezing
835− // auto-scroll. If the user was pinned to the last item just before the run
836− // began, bring the typing row into view so the pin (and streaming follow) is
837− // preserved. Guard on the raw last-visible index (isPinnedToBottom has already
838− // recomputed to false by now) so we don't scroll when the user had scrolled up.
839− LaunchedEffect(running) {
840− if (running && listItems.isNotEmpty()) {
841− val lastVisible = listState.layoutInfo.visibleItemsInfo.lastOrNull()?.index ?: -1
842− if (lastVisible >= listItems.lastIndex) {
843− runCatchingCancellable { listState.animateScrollToItem(listItems.size) }
848− LaunchedEffect(Unit) {
852− // Track list size + the streaming length of the last part so we auto-scroll
853− // as content arrives, plus the pinned flag. A small data class with primitive
854− // fields avoids the per-frame boxing that Triple<Int,Int,Boolean> pays
855− // (snapshotFlow re-evaluates this lambda every snapshot), and reading only the
856− // last part's length is O(1) vs. a sumOf over every part. Covering reasoning
857− // and tool output — not just TextPart — keeps a pinned view following a long
858− // reasoning/tool block while it streams (previously it stalled at 0).
859− val lastLen = streamingContentLength(messages.lastOrNull()?.parts?.lastOrNull())
860− AutoScrollSignal(currentListItems.size, lastLen, isPinnedToBottom)
861− }.collect { signal ->
862− if (signal.pinned) {
863− // Back at the bottom: clear the new-content badge.
864− hasNewContent = false
865− if (signal.size > 0) {
866− // Scroll to the effective last index, including the trailing
867− // "__typing" row when a run is active so the working indicator
868− // is brought into view (not just the last message).
869− val items = currentListItems
870− val target = if (running) items.size else items.lastIndex
871− listState.scrollToItem(target)
873− } else if (signal.size > prevSize || signal.lastTextLength > prevLen) {
874− // Content arrived while scrolled up — badge the jump-to-latest FAB.
875− hasNewContent = true
877− prevSize = signal.size
878− prevLen = signal.lastTextLength
882− CompositionLocalProvider(LocalRelativeTimeTick provides timeTick) {
883− // The bottomBar (ChatInputBar) already has imePadding, and the Scaffold's
884− // content padding accounts for the bottomBar's raised height, so the message
885− // list is already above the keyboard. Adding imePadding here would double-apply
886− // the IME inset and push messages too far up.
887− Box(modifier = Modifier.fillMaxSize().padding(padding)) {
888− if (activeConnection == null) {
890− modifier = Modifier.align(Alignment.Center).padding(24.dp),
891− horizontalAlignment = Alignment.CenterHorizontally,
894− stringResource(R.string.not_connected),
895− color = MaterialTheme.colorScheme.error,
897− Spacer(Modifier.size(12.dp))
898− Button(onClick = { vm.reconnect() }, enabled = !reconnecting) {
900− CircularProgressIndicator(
901− Modifier.size(20.dp),
902− color = MaterialTheme.colorScheme.onPrimary,
906− Text(stringResource(R.string.reconnect))
911− val bannerVisible = !isOnline || connectionState != EventStreamClient.ConnectionState.Connected
912− // Measure the banner's actual height instead of hardcoding 44dp. At large
913− // accessibility font scales the banner's labelMedium text + spinner + Retry
914− // button exceed 44dp, so a fixed inset lets the first message hide behind it
915− // (the same hazard FileViewScreen's overlay calls out). onSizeChanged only
916− // fires while the banner is composed (visible), so gate the inset on
917− // bannerVisible and fall back to 44dp until the first measurement arrives.
918− var bannerHeightPx by remember { mutableIntStateOf(0) }
919− val density = LocalDensity.current
920− val topPad = if (bannerVisible) {
921− if (bannerHeightPx > 0) {
922− with(density) { bannerHeightPx.toDp() } + 4.dp
930− state = connectionState,
931− modifier = Modifier.align(Alignment.TopCenter).onSizeChanged { bannerHeightPx = it.height },
932− isOnline = isOnline,
933− // On a hard failure, retry by forcing an SSE reconnect (which
934− // re-seeds from REST). refreshMessages is the right recovery path
935− // when the connection is present but the stream died; reconnect()
936− // is the path when the whole connection is gone (handled by the
937− // separate "Not connected" state below).
938− onRetry = { vm.refreshMessages() },
940− // Pull-to-refresh wraps ALL content states (loading, error, empty, list) so
941− // recovery is a swipe away everywhere — not just when the message list is
942− // populated. Previously PTR was only around the populated list, leaving the
943− // error/loading states reachable only via a button tap.
945− isRefreshing = refreshing,
946− onRefresh = { vm.refreshMessages() },
947− // Cap width and center on large screens for readability — full-width
948− // bubbles stretch edge-to-edge on tablets, hurting line-length comfort.
949− modifier = Modifier.fillMaxSize().wrapContentWidth(Alignment.CenterHorizontally)
950− .widthIn(max = NetworkConfig.chatContentMaxWidthDp.dp),
952− // Reserve top space when the banner is visible so it doesn't overlap the
953− // first message / state content. (topPad computed above.)
954− if (loading && messages.isEmpty()) {
955− val loadingLabel = stringResource(R.string.loading)
956− // Attach the a11y label directly to the spinner (a detached zero-size Box
957− // isn't reliably focused/announced by TalkBack) and show a visible label so
958− // sighted users get "Loading…" rather than a bare spinner.
960− modifier = Modifier.align(Alignment.Center).padding(top = topPad),
961− horizontalAlignment = Alignment.CenterHorizontally,
963− CircularProgressIndicator(
964− Modifier.semantics { contentDescription = loadingLabel },
967− Spacer(Modifier.size(8.dp))
970− style = MaterialTheme.typography.labelMedium,
971− color = MaterialTheme.colorScheme.onSurfaceVariant,
974− } else if (loadError && messages.isEmpty()) {
975− // A failed load with nothing to show. Distinct from the empty
976− // conversation state below — the conversation isn't empty, it
977− // failed to load, and offering "Start a conversation" here is
978− // misleading. Offer a Retry instead, mirroring SessionListScreen.
980− modifier = Modifier.align(Alignment.Center).padding(top = topPad).padding(24.dp),
981− horizontalAlignment = Alignment.CenterHorizontally,
984− stringResource(R.string.load_messages_failed),
985− color = MaterialTheme.colorScheme.error,
987− Spacer(Modifier.size(12.dp))
988− Button(onClick = { vm.refreshMessages() }) {
989− Text(stringResource(R.string.retry))
992− } else if (messages.isEmpty() && running) {
993− // A run just started but no parts have arrived yet — the empty
994− // list with only the trailing "working…" row looks broken, so
995− // surface a clear starting state until the first part streams in.
996− val workingText = stringResource(R.string.working)
998− modifier = Modifier.align(Alignment.Center).padding(top = topPad).padding(24.dp),
999− horizontalAlignment = Alignment.CenterHorizontally,
1001− CircularProgressIndicator(Modifier.size(28.dp), strokeWidth = 3.dp)
1002− Spacer(Modifier.size(12.dp))
1003− Text(workingText, style = MaterialTheme.typography.bodyMedium, color = MaterialTheme.colorScheme.onSurfaceVariant)
1005− } else if (messages.isEmpty()) {
1009− // Focus the input so the user can edit the suggestion before
1010− // sending, instead of having to manually tap the field.
1011− runCatching { inputFocusRequester.requestFocus() }
1013− modifier = Modifier.align(Alignment.Center).padding(top = topPad),
1016− val lastMessageId = messages.lastOrNull()?.info?.id
1017− // Text-to-speech for reading assistant replies aloud; shuts down when the
1018− // message list leaves composition.
1019− val tts = rememberTtsController()
1020− val speakingMessageId by tts.speakingId
1023− modifier = Modifier.fillMaxSize(),
1024− // Extra bottom padding reserves room for the jump-to-latest FAB so it
1025− // never floats over the last message. Top padding grows when the
1026− // connection banner is visible so it doesn't overlap the first message.
1027− contentPadding = PaddingValues(
1031− bottom = 16.dp + NetworkConfig.chatListFabInsetDp.dp,
1033− verticalArrangement = Arrangement.spacedBy(16.dp),
1038− contentType = { it.contentType },
1040− // Default placement animation so inserted/moved rows glide in. Skipped
1041− // entirely under reduced motion so a streaming message growing in place
1042− // doesn't animate on every token (and respects the a11y preference).
1044− if (LocalReducedMotion.current) Modifier else Modifier.animateItem(),
1047− is MessageListItem.Separator -> DateSeparator(item.label)
1048− is MessageListItem.Message -> {
1049− val message = item.message
1050− // Only the last (streaming) message needs isRunning — it drives the
1051− // reasoning-block spinner. Passing the live flag to every bubble
1052− // makes all visible messages recompose whenever a run starts or stops.
1053− val modelLabel = remember(message.info, models) {
1054− (message.info as? soy.iko.opencode.data.model.AssistantMessage)
1055− ?.let { resolveModelLabel(it, models) }
1057− // Text used to drive swipe-to-reply (and pre-fill the quote). Empty for
1058− // image/code-only messages, which then opt out of the swipe gesture.
1059− val quoteText = remember(message.parts) {
1061− .filterIsInstance<TextPart>()
1062− .joinToString("\n\n") { it.text }
1064− .takeIf { it.isNotEmpty() }
1066− // Swipe-start-to-end reveals a reply affordance and triggers quote-reply,
1067− // snapping back (the message isn't dismissed — the quote fills the composer).
1068− // Only enabled when there's text to quote, so non-text messages don't
1069− // capture horizontal drags (e.g. inside a horizontally-scrollable code block).
1070− val swipeState = rememberSwipeToDismissBoxState(
1071− confirmValueChange = { value ->
1072− if (value == SwipeToDismissBoxValue.StartToEnd && quoteText != null) {
1073− haptics.performHapticFeedback(androidx.compose.ui.hapticfeedback.HapticFeedbackType.TextHandleMove)
1074− vm.quoteReply(quoteText)
1075− runCatching { inputFocusRequester.requestFocus() }
1081− state = swipeState,
1082− enableDismissFromEndToStart = false,
1083− enableDismissFromStartToEnd = quoteText != null,
1084− backgroundContent = {
1086− Modifier.fillMaxSize().padding(horizontal = 16.dp),
1087− contentAlignment = Alignment.CenterStart,
1090− Icons.AutoMirrored.Filled.Reply,
1091− contentDescription = null,
1092− tint = MaterialTheme.colorScheme.onSurfaceVariant,
1099− isRunning = running && message.info.id == lastMessageId,
1100− imageContext = imageContext,
1101− modelLabel = modelLabel,
1102− onOpenFile = onOpenFile,
1103− onRevert = { vm.revertTo(message.info.id) },
1105− // editMessage reverts to before this message (hiding it and
1106− // everything after); the revert banner surfaces the rewind
1107− // with an Undo. Focus + scroll the composer into view like the
1108− // Quote action so the prefilled draft isn't off-screen.
1109− haptics.performHapticFeedback(androidx.compose.ui.hapticfeedback.HapticFeedbackType.TextHandleMove)
1110− vm.editMessage(message.info.id, text)
1111− runCatching { inputFocusRequester.requestFocus() }
1112− contentScope.launch {
1113− runCatchingCancellable {
1114− listState.animateScrollToItem(listItems.lastIndex.coerceAtLeast(0))
1118− onSpeak = { text -> tts.toggle(message.info.id, text) },
1119− isSpeaking = message.info.id == speakingMessageId,
1120− onQuote = { text ->
1121− vm.quoteReply(text)
1122− runCatching { inputFocusRequester.requestFocus() }
1124− onBranch = { text -> vm.branchFrom(text) },
1125− sendStatus = optimisticStatuses[message.info.id]?.let { failed ->
1126− if (failed) soy.iko.opencode.ui.chat.MessageSendStatus.FAILED
1127− else soy.iko.opencode.ui.chat.MessageSendStatus.SENDING
1129− isEdited = message.info.time?.let { it.updated != null && it.updated != it.created } == true,
1130− onRetry = optimisticStatuses[message.info.id]?.let { failed ->
1132− { vm.retryOptimisticMessage(message.info.id) }
1137− onDismiss = optimisticStatuses[message.info.id]?.let { failed ->
1139− { vm.dismissOptimistic(message.info.id) }
1151− item(key = "__typing") {
1152− val workingText = stringResource(R.string.working)
1154− verticalAlignment = Alignment.CenterVertically,
1155− modifier = Modifier.semantics {
1156− contentDescription = workingText
1159− CircularProgressIndicator(Modifier.size(16.dp), strokeWidth = 2.dp)
1160− Text(workingText, style = MaterialTheme.typography.labelMedium, modifier = Modifier.padding(start = 6.dp))
1167− // Jump-to-latest affordance when the user has scrolled away during a stream.
1168− val fabMotion = rememberVisibilityTransitions()
1169− AnimatedVisibility(
1170− visible = !isPinnedToBottom && listItems.isNotEmpty(),
1171− enter = fabMotion.enter,
1172− exit = fabMotion.exit,
1173− modifier = Modifier.align(Alignment.BottomEnd),
1175− // Badge the FAB when new content arrived while the user was scrolled up, so
1176− // they know there's something new to jump to (cleared once back at bottom).
1179− if (hasNewContent) {
1180− val newContentLabel = stringResource(R.string.new_messages)
1181− Badge(modifier = Modifier.semantics { contentDescription = newContentLabel })
1184− modifier = Modifier.padding(end = 16.dp, bottom = 16.dp),
1186− ExtendedFloatingActionButton(
1188− hasNewContent = false
1189− if (listItems.isNotEmpty()) {
1190− // Scroll to the effective last index, including the
1191− // trailing "__typing" row when a run is active.
1192− val target = if (running) listItems.size else listItems.lastIndex
1193− contentScope.launch { runCatchingCancellable { listState.animateScrollToItem(target) } }
1196− // contentDescription null: the visible "Latest" text already labels
1197− // the FAB, so a description here makes TalkBack announce "Latest" twice.
1198− icon = { Icon(Icons.Filled.KeyboardArrowDown, contentDescription = null) },
1199− text = { Text(stringResource(R.string.latest)) },
1203− // Scroll-to-top affordance: a small FAB at the start edge, visible when the
1204− // user has scrolled down past the first few messages. Symmetric to the
1205− // jump-to-latest FAB, for long conversations where manual fling back is tedious.
1206− val scrolledDown by remember {
1207− derivedStateOf { listState.firstVisibleItemIndex > 0 || listState.firstVisibleItemScrollOffset > 200 }
1209− AnimatedVisibility(
1210− visible = scrolledDown && listItems.size > 4,
1211− enter = fabMotion.enter,
1212− exit = fabMotion.exit,
1213− modifier = Modifier.align(Alignment.BottomStart),
1215− SmallFloatingActionButton(
1217− contentScope.launch { runCatchingCancellable { listState.animateScrollToItem(0) } }
1219− modifier = Modifier.padding(start = 16.dp, bottom = 16.dp),
1222− Icons.Filled.KeyboardArrowUp,
1223− contentDescription = stringResource(R.string.scroll_to_top),
1232− if (showExitConfirm) {
1234− onDismissRequest = { showExitConfirm = false },
1235− title = { Text(stringResource(R.string.stop_and_exit_title)) },
1236− text = { Text(stringResource(R.string.stop_and_exit_text)) },
1238− TextButton(onClick = {
1239− showExitConfirm = false
1240− haptics.performHapticFeedback(androidx.compose.ui.hapticfeedback.HapticFeedbackType.TextHandleMove)
1243− }) { Text(stringResource(R.string.stop_and_exit)) }
1246− TextButton(onClick = { showExitConfirm = false }) { Text(stringResource(R.string.stay)) }
1251− if (showStopConfirm) {
1253− onDismissRequest = { showStopConfirm = false },
1254− title = { Text(stringResource(R.string.stop_run_title)) },
1255− text = { Text(stringResource(R.string.stop_run_text)) },
1257− TextButton(onClick = {
1258− showStopConfirm = false
1259− haptics.performHapticFeedback(androidx.compose.ui.hapticfeedback.HapticFeedbackType.TextHandleMove)
1261− }) { Text(stringResource(R.string.stop), color = MaterialTheme.colorScheme.error) }
1264− TextButton(onClick = { showStopConfirm = false }) { Text(stringResource(R.string.cancel)) }
1269− if (showSummarizeConfirm) {
1271− onDismissRequest = { showSummarizeConfirm = false },
1272− title = { Text(stringResource(R.string.summarize_confirm_title)) },
1273− text = { Text(stringResource(R.string.summarize_confirm_text)) },
1275− TextButton(onClick = {
1276− showSummarizeConfirm = false
1278− }) { Text(stringResource(R.string.action_continue)) }
1281− TextButton(onClick = { showSummarizeConfirm = false }) { Text(stringResource(R.string.cancel)) }
1286− if (showInitConfirm) {
1288− onDismissRequest = { showInitConfirm = false },
1289− title = { Text(stringResource(R.string.init_confirm_title)) },
1290− text = { Text(stringResource(R.string.init_confirm_text)) },
1292− TextButton(onClick = {
1293− showInitConfirm = false
1295− }) { Text(stringResource(R.string.action_continue)) }
1298− TextButton(onClick = { showInitConfirm = false }) { Text(stringResource(R.string.cancel)) }
1303− if (showRenameDialog) {
1304− RenameSessionChatDialog(
1305− initialTitle = sessionTitle ?: "",
1306− onDismiss = { showRenameDialog = false },
1307− onConfirm = { newName ->
1308− showRenameDialog = false
1309− vm.renameSession(newName)
1314− if (showDeleteDialog) {
1316− onDismissRequest = { showDeleteDialog = false },
1317− title = { Text(stringResource(R.string.delete_session_chat_title)) },
1318− text = { Text(stringResource(R.string.delete_session_chat_text, sessionTitle ?: sessionLabel)) },
1320− TextButton(onClick = {
1321− showDeleteDialog = false
1322− haptics.performHapticFeedback(androidx.compose.ui.hapticfeedback.HapticFeedbackType.LongPress)
1324− }) { Text(stringResource(R.string.delete), color = MaterialTheme.colorScheme.error) }
1327− TextButton(onClick = { showDeleteDialog = false }) { Text(stringResource(R.string.cancel)) }
1332− if (showShellDialog) {
1333− ShellCommandDialog(
1334− onDismiss = { showShellDialog = false },
1336− showShellDialog = false
1342− if (showModelPicker) {
1345− selected = selectedModel,
1346− loading = modelsLoading,
1347− error = modelsError,
1348− onSelect = { vm.selectModel(it) },
1349− onRetry = { vm.reloadModels() },
1350− onDismiss = { showModelPicker = false },
1354− if (showAgentPicker) {
1357− selected = selectedAgent,
1358− loading = agentsLoading,
1359− error = agentsError,
1360− onSelect = { vm.selectAgent(it?.name) },
1361− onRetry = { vm.reloadAgents() },
1362− onDismiss = { showAgentPicker = false },
1366− if (showCommandPicker) {
1367− CommandPickerSheet(
1368− commands = commands,
1369− loading = commandsLoading,
1370− error = commandsError,
1371− onSelect = { vm.runCommand(it) },
1372− onRetry = { vm.reloadCommands() },
1373− onDismiss = { showCommandPicker = false },
1377− pendingPermission?.let { permission ->
1379− permission = permission,
1380− position = permissionProgress.position,
1381− total = permissionProgress.total,
1382− onRespond = { response -> vm.respondPermission(permission, response) },
1387− CommandPalette(actions = paletteActions, onDismiss = { showPalette = false })
1392−private fun ChatInputBar(
1394− onValueChange: (String) -> Unit,
1398− sendOnEnter: Boolean,
1399− onSend: () -> Unit,
1400− onAbort: () -> Unit,
1401− queuedFollowUp: String?,
1402− onQueueFollowUp: (String) -> Unit,
1403− onCancelQueue: () -> Unit,
1404− focusRequester: androidx.compose.ui.focus.FocusRequester,
1405− attachments: List<PendingAttachment>,
1407− onRemoveAttachment: (String) -> Unit,
1408− onPickPhoto: () -> Unit,
1409− onPickFile: () -> Unit,
1410− onCamera: () -> Unit,
1411− onVoice: () -> Unit,
1413− // Sendable when there's text OR at least one attachment (an image-only prompt is valid).
1414− val hasContent = value.isNotBlank() || attachments.isNotEmpty()
1415− // Full-screen editor state: opened when the user wants more space for a long prompt.
1416− var showFullScreenEditor by rememberSaveable { mutableStateOf(false) }
1417− Surface(tonalElevation = 3.dp, modifier = Modifier.imePadding()) {
1418− Column(modifier = Modifier.fillMaxWidth().windowInsetsPadding(WindowInsets.navigationBars)) {
1419− // A queued follow-up replaces the Stop button with a "queued" chip so the
1420− // user sees their message will be sent when the run finishes, and can cancel.
1421− if (queuedFollowUp != null) {
1423− modifier = Modifier
1425− .padding(start = 12.dp, top = 6.dp, end = 4.dp),
1426− verticalAlignment = Alignment.CenterVertically,
1428− Column(modifier = Modifier.weight(1f)) {
1430− stringResource(R.string.queued),
1431− style = MaterialTheme.typography.labelSmall,
1432− color = MaterialTheme.colorScheme.onSurfaceVariant,
1436− style = MaterialTheme.typography.bodySmall,
1437− color = MaterialTheme.colorScheme.onSurfaceVariant,
1439− overflow = TextOverflow.Ellipsis,
1442− TextButton(onClick = onCancelQueue, contentPadding = androidx.compose.foundation.layout.PaddingValues(horizontal = 8.dp)) {
1443− Text(stringResource(R.string.cancel))
1447− // Staged attachments: horizontally-scrollable thumbnails/chips, each removable.
1448− AttachmentStrip(attachments, onRemove = onRemoveAttachment, staging = staging)
1450− modifier = Modifier.fillMaxWidth().padding(8.dp),
1451− verticalAlignment = Alignment.Bottom,
1453− // Attach menu: photo picker, camera, or any file.
1454− var showAttachMenu by remember { mutableStateOf(false) }
1456− IconButton(onClick = { showAttachMenu = true }, enabled = enabled) {
1457− Icon(Icons.Filled.Add, contentDescription = stringResource(R.string.add_attachment))
1459− DropdownMenu(expanded = showAttachMenu, onDismissRequest = { showAttachMenu = false }) {
1461− leadingIcon = { Icon(Icons.Filled.PhotoLibrary, contentDescription = null) },
1462− text = { Text(stringResource(R.string.attach_photo)) },
1463− onClick = { showAttachMenu = false; onPickPhoto() },
1466− leadingIcon = { Icon(Icons.Filled.PhotoCamera, contentDescription = null) },
1467− text = { Text(stringResource(R.string.attach_camera)) },
1468− onClick = { showAttachMenu = false; onCamera() },
1471− leadingIcon = { Icon(Icons.Filled.Description, contentDescription = null) },
1472− text = { Text(stringResource(R.string.attach_file)) },
1473− onClick = { showAttachMenu = false; onPickFile() },
1477− // Voice dictation: appends recognized speech to the draft.
1478− IconButton(onClick = onVoice, enabled = enabled) {
1479− Icon(Icons.Filled.Mic, contentDescription = stringResource(R.string.voice_input))
1481− // Expand to a full-screen editor for long prompts (the inline field caps at 6 lines).
1482− IconButton(onClick = { showFullScreenEditor = true }, enabled = enabled) {
1483− Icon(Icons.Filled.Expand, contentDescription = stringResource(R.string.expand_editor))
1487− onValueChange = { v ->
1488− // Cap input length so a huge paste can't stall the UI. Shares are
1489− // capped separately in MainActivity; this guards typed/pasted drafts.
1490− onValueChange(v.take(NetworkConfig.maxDraftLengthChars))
1492− modifier = Modifier
1494− .focusRequester(focusRequester)
1495− .testTag("chat_input")
1496− .onPreviewKeyEvent { event ->
1497− if (event.type != KeyEventType.KeyDown || event.key != Key.Enter) return@onPreviewKeyEvent false
1498− // With "Send on Enter" on, Enter sends (Shift+Enter newlines).
1499− // With it off, Enter inserts a newline and Ctrl+Enter sends.
1500− val send = enterShouldSend(
1502− hasContent = hasContent,
1503− sendOnEnter = sendOnEnter,
1504− shift = event.isShiftPressed,
1505− ctrl = event.isCtrlPressed,
1508− if (running) onQueueFollowUp(value) else onSend()
1514− // While a run is active a typed message only queues (sends after the run), so
1515− // the placeholder says so instead of the plain "Message…".
1517− Text(stringResource(if (running) R.string.composer_hint_running else R.string.message_placeholder))
1521− // Show a "N / max" countdown once the draft crosses a high fraction of
1522− // the cap, so the user knows a paste is about to be truncated instead
1523− // of being silently cut off. Hidden for normal short prompts to avoid
1524− // clutter under a typical one-line message.
1526− val threshold = (NetworkConfig.maxDraftLengthChars * NetworkConfig.draftCountdownThresholdFraction).toInt()
1527− if (value.length >= threshold) {
1530− R.string.draft_chars_remaining,
1531− NetworkConfig.maxDraftLengthChars - value.length,
1532− NetworkConfig.maxDraftLengthChars,
1534− style = MaterialTheme.typography.labelSmall,
1535− color = if (value.length >= NetworkConfig.maxDraftLengthChars) MaterialTheme.colorScheme.error
1536− else MaterialTheme.colorScheme.onSurfaceVariant,
1540− keyboardOptions = KeyboardOptions(
1541− // When "Send on Enter" is on, expose ImeAction.Send so the soft
1542− // keyboard shows a send key — matching the setting's intent and
1543− // giving touch-only users a keyboard send affordance. When off,
1544− // ImeAction.Default keeps the enter/newline key for multi-line input.
1545− imeAction = if (sendOnEnter) ImeAction.Send else ImeAction.Default,
1546− capitalization = KeyboardCapitalization.Sentences,
1548− keyboardActions = KeyboardActions(
1550− if (enabled && hasContent) onSend()
1554− ComposerTrailingButton(
1556− aborting = aborting,
1557− canSend = enabled && hasContent,
1558− canQueue = enabled && value.isNotBlank(),
1561− onQueue = { onQueueFollowUp(value) },
1565− if (showFullScreenEditor) {
1568− onValueChange = onValueChange,
1569− onDismiss = { showFullScreenEditor = false },
1570− onSend = { showFullScreenEditor = false; onSend() },
1571− canSend = enabled && hasContent,
1577−/** Full-screen editor dialog for composing long prompts. Gives the full viewport height to
1578− * the text field (vs the inline 6-line cap) with a Send button and a collapse action. */
1579−@OptIn(ExperimentalMaterial3Api::class)
1581−private fun FullScreenEditor(
1583− onValueChange: (String) -> Unit,
1584− onDismiss: () -> Unit,
1585− onSend: () -> Unit,
1588− androidx.compose.ui.window.Dialog(
1589− onDismissRequest = onDismiss,
1590− properties = androidx.compose.ui.window.DialogProperties(usePlatformDefaultWidth = false, decorFitsSystemWindows = false),
1594− androidx.compose.material3.TopAppBar(
1595− title = { Text(stringResource(R.string.message_placeholder)) },
1597− androidx.compose.material3.TextButton(onClick = onDismiss) {
1598− Text(stringResource(R.string.collapse_editor))
1604− Surface(tonalElevation = 3.dp) {
1606− modifier = Modifier.fillMaxWidth().imePadding().padding(12.dp),
1607− horizontalArrangement = Arrangement.End,
1609− androidx.compose.material3.Button(onClick = onSend, enabled = canSend) {
1610− Text(stringResource(R.string.send))
1618− onValueChange = { v -> onValueChange(v.take(NetworkConfig.maxDraftLengthChars)) },
1619− modifier = Modifier.fillMaxSize().padding(padding),
1620− placeholder = { Text(stringResource(R.string.message_placeholder)) },
1621− maxLines = Int.MAX_VALUE,
1622− keyboardOptions = KeyboardOptions(imeAction = ImeAction.Default, capitalization = KeyboardCapitalization.Sentences),
1628−/** Whether a hardware Enter keypress should send: never when disabled/empty; otherwise
1629− * Enter sends (unless Shift) when send-on-Enter is on, else only Ctrl+Enter sends. */
1630−private fun enterShouldSend(
1632− hasContent: Boolean,
1633− sendOnEnter: Boolean,
1637− !enabled || !hasContent -> false
1638− sendOnEnter -> !shift
1642−/** The composer's trailing button: while a run is active a Stop (with in-flight spinner),
1643− * preceded by a Queue button when the user has typed a follow-up; otherwise Send. Extracted so
1644− * [ChatInputBar] stays under the complexity threshold. */
1646−private fun ComposerTrailingButton(
1651− onSend: () -> Unit,
1652− onAbort: () -> Unit,
1653− onQueue: () -> Unit,
1656− Row(verticalAlignment = Alignment.CenterVertically) {
1657− // While a run is active the trailing action is Stop, so the only send affordance is
1658− // the keyboard's IME action — which is a plain newline when "Send on Enter" is off.
1659− // That leaves a touch-only user with the setting off no way to queue a follow-up
1660− // (Ctrl+Enter needs a hardware keyboard). Surface an explicit Queue button whenever
1661− // there's typed TEXT so queuing is always reachable, without changing the user's
1662− // Enter-inserts-a-newline preference. Gate on typed text — not the send-oriented
1663− // canSend, which is also true for an attachment-only composer — because queuing "" just
1664− // calls setQueuedFollowUp(null), silently cancelling any already-queued follow-up and
1665− // dropping the staged attachment (queued follow-ups don't carry attachments anyway).
1669− modifier = Modifier.testTag("queue_button"),
1671− // PlaylistAdd reads as "add to a queue/list" more clearly than a clock
1672− // icon (which can be read as "snooze" or "later"), and isn't confused with
1673− // the Send action sitting right beside the Stop button.
1675− Icons.AutoMirrored.Filled.PlaylistAdd,
1676− contentDescription = stringResource(R.string.queue_followup),
1680− // Show a spinner while the abort REST call is in flight so the user sees the stop
1681− // was sent, and disable to prevent a double-tap.
1684− enabled = !aborting,
1685− modifier = Modifier.padding(start = 4.dp).testTag("stop_button"),
1688− val stopLabel = stringResource(R.string.stop)
1689− CircularProgressIndicator(
1690− Modifier.size(18.dp).semantics { contentDescription = stopLabel },
1691− strokeWidth = 2.dp,
1694− Icon(Icons.Filled.Stop, contentDescription = stringResource(R.string.stop))
1702− modifier = Modifier.padding(start = 4.dp).testTag("send_button"),
1704− Icon(Icons.AutoMirrored.Filled.Send, contentDescription = stringResource(R.string.send))
1709−@OptIn(androidx.compose.foundation.layout.ExperimentalLayoutApi::class)
1711−private fun EmptyConversation(
1712− onSuggestion: (String) -> Unit,
1713− modifier: Modifier = Modifier,
1715− // A few example prompts so a first-time user has a one-tap path to their first
1716− // message instead of staring at a blank input. Tapping a chip fills the draft
1717− // (without sending) so the user can edit it before sending.
1718− val suggestions = remember {
1720− R.string.empty_chat_suggest_1,
1721− R.string.empty_chat_suggest_2,
1722− R.string.empty_chat_suggest_3,
1726− modifier = modifier.padding(32.dp),
1727− horizontalAlignment = Alignment.CenterHorizontally,
1730− Icons.Filled.AutoAwesome,
1731− contentDescription = null,
1732− modifier = Modifier.size(48.dp),
1733− tint = MaterialTheme.colorScheme.onSurfaceVariant,
1735− Spacer(Modifier.size(16.dp))
1737− stringResource(R.string.empty_chat_title),
1738− style = MaterialTheme.typography.titleMedium,
1740− Spacer(Modifier.size(8.dp))
1742− stringResource(R.string.empty_chat_hint),
1743− style = MaterialTheme.typography.bodyMedium,
1744− color = MaterialTheme.colorScheme.onSurfaceVariant,
1746− Spacer(Modifier.size(20.dp))
1747− // Suggestion chips wrap across rows on narrow screens instead of stacking full-width,
1748− // so a longer localized prompt doesn't push the chips off-screen on a phone.
1750− modifier = Modifier.fillMaxWidth(),
1751− horizontalArrangement = Arrangement.spacedBy(8.dp),
1752− verticalArrangement = Arrangement.spacedBy(8.dp),
1754− suggestions.forEach { resId ->
1755− val text = stringResource(resId)
1756− androidx.compose.material3.AssistChip(
1757− onClick = { onSuggestion(text) },
1758− label = { Text(text, style = MaterialTheme.typography.bodyMedium) },
1765−/** A banner shown while a revert checkpoint is active, offering an Undo (unrevert). */
1767−private fun RevertBanner(onUndo: () -> Unit) {
1769− color = MaterialTheme.colorScheme.tertiaryContainer,
1770− tonalElevation = 2.dp,
1771− modifier = Modifier.fillMaxWidth(),
1774− modifier = Modifier.fillMaxWidth().padding(start = 12.dp, end = 4.dp, top = 4.dp, bottom = 4.dp),
1775− verticalAlignment = Alignment.CenterVertically,
1776− horizontalArrangement = Arrangement.SpaceBetween,
1778− Row(verticalAlignment = Alignment.CenterVertically, modifier = Modifier.weight(1f)) {
1780− Icons.Filled.Restore,
1781− contentDescription = null,
1782− tint = MaterialTheme.colorScheme.onTertiaryContainer,
1783− modifier = Modifier.size(18.dp),
1786− stringResource(R.string.reverted_banner),
1787− style = MaterialTheme.typography.bodySmall,
1788− color = MaterialTheme.colorScheme.onTertiaryContainer,
1789− modifier = Modifier.padding(start = 8.dp),
1792− TextButton(onClick = onUndo) { Text(stringResource(R.string.undo)) }
1797−/** A banner shown while messages composed offline are queued in the outbox, with a
1798− * "Send now" nudge and a discard. Shows a spinner while the queue is flushing. */
1800−private fun OutboxBanner(
1803− onFlush: () -> Unit,
1804− onDiscard: () -> Unit,
1807− color = MaterialTheme.colorScheme.secondaryContainer,
1808− tonalElevation = 2.dp,
1809− modifier = Modifier.fillMaxWidth(),
1812− modifier = Modifier.fillMaxWidth().padding(start = 12.dp, end = 4.dp, top = 4.dp, bottom = 4.dp),
1813− verticalAlignment = Alignment.CenterVertically,
1814− horizontalArrangement = Arrangement.SpaceBetween,
1816− Row(verticalAlignment = Alignment.CenterVertically, modifier = Modifier.weight(1f)) {
1818− CircularProgressIndicator(
1819− Modifier.size(16.dp),
1820− strokeWidth = 2.dp,
1821− color = MaterialTheme.colorScheme.onSecondaryContainer,
1823− Spacer(Modifier.size(8.dp))
1827− stringResource(R.string.outbox_sending)
1829− val res = if (count == 1) R.string.outbox_pending_one else R.string.outbox_pending_many
1830− stringResource(res, count)
1832− style = MaterialTheme.typography.bodySmall,
1833− color = MaterialTheme.colorScheme.onSecondaryContainer,
1837− TextButton(onClick = onFlush) { Text(stringResource(R.string.outbox_flush)) }
1838− TextButton(onClick = onDiscard) {
1839− Text(stringResource(R.string.outbox_discard_all), color = MaterialTheme.colorScheme.error)
1846−/** Prompt for a one-off shell command to run in the session's worktree. */
1848−private fun ShellCommandDialog(onDismiss: () -> Unit, onRun: (String) -> Unit) {
1849− var command by rememberSaveable { mutableStateOf("") }
1851− onDismissRequest = onDismiss,
1852− title = { Text(stringResource(R.string.run_shell_command)) },
1856− onValueChange = { command = it },
1857− modifier = Modifier.fillMaxWidth(),
1858− placeholder = { Text(stringResource(R.string.shell_command_hint)) },
1859− label = { Text(stringResource(R.string.shell_command_label)) },
1861− keyboardOptions = KeyboardOptions(imeAction = ImeAction.Done),
1862− keyboardActions = KeyboardActions(onDone = { if (command.isNotBlank()) onRun(command.trim()) }),
1867− onClick = { if (command.isNotBlank()) onRun(command.trim()) },
1868− enabled = command.isNotBlank(),
1869− ) { Text(stringResource(R.string.run)) }
1871− dismissButton = { TextButton(onClick = onDismiss) { Text(stringResource(R.string.cancel)) } },
1876− * Change signal for the auto-scroll-on-stream watcher. Primitive fields avoid the
1877− * boxing `Triple<Int, Int, Boolean>` would impose on every snapshot evaluation, and
1878− * equality is structural so `snapshotFlow` emits only when something relevant changes.
1880−private data class AutoScrollSignal(val size: Int, val lastTextLength: Int, val pinned: Boolean)
1882−/** Length of the streaming content carried by [part], driving auto-scroll as it grows.
1883− * Covers text, reasoning, and tool output so a pinned view keeps following non-text
1884− * streaming, not just plain assistant text. O(1). */
1885−private fun streamingContentLength(part: Part?): Int = when (part) {
1886− is TextPart -> part.text.length
1887− is ReasoningPart -> part.text.length
1888− is ToolPart -> when (val st = part.state) {
1889− is ToolCompleted -> st.output?.length ?: 0
1890− is ToolError -> st.error?.length ?: 0
1891− is ToolRunning -> st.title?.length ?: 0
1897−/** Rename dialog for the currently-open session. Mirrors the SessionListScreen rename
1898− * dialog but lives in the chat screen so the user can rename without backing out to
1899− * the list. Pre-filled with the current title; the cap matches the list dialog. */
1901−private fun RenameSessionChatDialog(
1902− initialTitle: String,
1903− onDismiss: () -> Unit,
1904− onConfirm: (String) -> Unit,
1906− // Seed the field once (no key input) so a later external title change — e.g. opencode
1907− // auto-generating a session title after the first prompt, arriving via SessionUpdated —
1908− // doesn't re-initialize the box and discard the user's in-progress edit.
1909− var title by rememberSaveable { mutableStateOf(initialTitle) }
1911− onDismissRequest = onDismiss,
1912− title = { Text(stringResource(R.string.rename_session_chat)) },
1916− onValueChange = { v -> title = v.take(NetworkConfig.maxSessionTitleChars) },
1917− modifier = Modifier.fillMaxWidth(),
1918− placeholder = { Text(stringResource(R.string.session_title_hint)) },
1919− label = { Text(stringResource(R.string.rename_session_chat)) },
1921− keyboardOptions = KeyboardOptions(imeAction = ImeAction.Done),
1922− keyboardActions = KeyboardActions(onDone = { if (title.isNotBlank()) onConfirm(title.trim()) }),
1926− TextButton(onClick = { if (title.isNotBlank()) onConfirm(title.trim()) }, enabled = title.isNotBlank()) {
1927− Text(stringResource(R.string.save))
1931− TextButton(onClick = onDismiss) { Text(stringResource(R.string.cancel)) }
1937− * A single item in the chat message list — either a [Message] bubble or a day
1938− * [Separator] inserted before the first message of a new day. The separator shifts
1939− * the LazyColumn indices vs. the raw messages list, so scroll-target math must use
1940− * the [List] of these items (not `messages.size`/`lastIndex`).
1942−private sealed interface MessageListItem {
1944− val contentType: Any
1946− data class Message(val message: MessageWithParts, override val key: Any) : MessageListItem {
1947− override val contentType: Any get() = message.info::class
1950− data class Separator(val label: String, val ordinal: Int) : MessageListItem {
1951− // Key on the day-occurrence ordinal, not the label: two non-contiguous groups
1952− // can share a label (e.g. an untimestamped message — empty label — between two
1953− // same-day messages, or two untimestamped groups), and a label-only key would
1954− // then collide, which makes LazyColumn throw on duplicate keys. The ordinal is
1955− // stable for a given message ordering so slots aren't needlessly recreated.
1956− override val key: Any get() = "sep_${ordinal}_$label"
1957− // Separators share a contentType so the LazyColumn can recycle their slots.
1958− override val contentType: Any get() = "separator"
1963− * Build the interleaved list of [MessageListItem]s for the message list, inserting a
1964− * [MessageListItem.Separator] before the first message of each new calendar day. Uses
1965− * the message's `time.created` (falling back to `updated` then `completed`) to bucket.
1966− * Messages with no timestamp are grouped under an empty-label separator only if they
1967− * start the list, so a server that omits timestamps doesn't suppress the first divider.
1969− * [todayLabel]/[yesterdayLabel] are resolved by the caller (a @Composable can't call
1970− * stringResource from inside this plain function) and used for the "Today"/"Yesterday"
1971− * labels; older days fall back to a locale-stable medium-date format.
1973−private fun buildMessageListItems(
1974− messages: List<MessageWithParts>,
1975− todayLabel: String,
1976− yesterdayLabel: String,
1977−): List<MessageListItem> {
1978− if (messages.isEmpty()) return emptyList()
1979− val today = java.time.LocalDate.now(java.time.ZoneId.systemDefault())
1980− val dateFmt = mediumDateFormat()
1981− val result = ArrayList<MessageListItem>(messages.size + 4)
1982− val seenKeys = HashSet<String>(messages.size * 2)
1983− var lastDayKey: String? = null
1985− var emptyIdOrdinal = 0
1987− for (message in messages) {
1988− val ts = message.info.time?.created ?: message.info.time?.updated ?: message.info.time?.completed
1989− val dayKey = ts?.let { dayKey(it) } ?: ""
1990− // Emit a separator before the very first message (so a leading un-timestamped message
1991− // still gets the first divider, empty label and all), and thereafter only when crossing
1992− // into a new NON-empty calendar day. An un-timestamped message mid-list (empty key)
1993− // neither emits its own separator nor resets the day — otherwise a following same-day
1994− // message would see a "" -> "<today>" transition and emit a duplicate "Today" header.
1995− if (first || (dayKey.isNotEmpty() && dayKey != lastDayKey)) {
1996− result.add(MessageListItem.Separator(dayLabel(dayKey, ts ?: 0L, today, todayLabel, yesterdayLabel, dateFmt), sepOrdinal++))
1998− if (dayKey.isNotEmpty()) lastDayKey = dayKey
2000− // Most messages have a unique non-empty id. An unrecognized-role message can carry an
2001− // empty id — and the reducer intentionally keeps several such messages as distinct
2002− // holders — so give each a stable synthetic key and defensively de-collide any remaining
2003− // duplicate; otherwise LazyColumn throws on a duplicate key and the whole screen crashes.
2004− var key = message.info.id.ifEmpty { "msg-empty-${emptyIdOrdinal++}" }
2005− if (!seenKeys.add(key)) {
2007− while (!seenKeys.add("$key#$suffix")) suffix++
2008− key = "$key#$suffix"
2010− result.add(MessageListItem.Message(message, key))
2016− * A stable bucket key for a timestamp's calendar day (epoch-days as a string).
2018− * [buildMessageListItems] re-runs on every streaming snapshot (the memo is keyed on the
2019− * whole `messages` list, which must stay so the live message's fresh parts render), so a
2020− * naive implementation would re-allocate an `Instant`/`ZonedDateTime`/`LocalDate` for
2021− * every message on every token. Message timestamps are immutable once assigned, so we
2022− * memoize the parse per epoch-millis: after the first snapshot, each unchanged message is
2023− * a cheap hash lookup. Bounded LRU (access-order) caps memory; only touched on the main
2024− * thread during composition, so the coarse lock is uncontended.
2026−private val dayKeyCache = object : LinkedHashMap<Long, String>(128, 0.75f, true) {
2027− override fun removeEldestEntry(eldest: MutableMap.MutableEntry<Long, String>): Boolean = size > 1024
2030−private fun dayKey(epochMillis: Long): String = synchronized(dayKeyCache) {
2031− dayKeyCache.getOrPut(epochMillis) {
2032− java.time.Instant.ofEpochMilli(epochMillis)
2033− .atZone(java.time.ZoneId.systemDefault()).toLocalDate().toEpochDay().toString()
2037−// The medium-date formatter is an ICU locale lookup; cache one instance instead of
2038−// allocating a fresh one per buildMessageListItems call, rebuilding only if the default
2039−// locale changes at runtime. Main-thread-only, so no synchronization is needed.
2040−private var cachedDateFmt: java.text.DateFormat? = null
2041−private var cachedDateFmtLocale: java.util.Locale? = null
2043−private fun mediumDateFormat(): java.text.DateFormat {
2044− val locale = java.util.Locale.getDefault()
2045− val existing = cachedDateFmt
2046− if (existing != null && cachedDateFmtLocale == locale) return existing
2047− return java.text.DateFormat.getDateInstance(java.text.DateFormat.MEDIUM).also {
2049− cachedDateFmtLocale = locale
2054− * Resolve a day-key back to a human-readable label. "Today" / "Yesterday" for the
2055− * recent days, otherwise a locale-stable medium-date format. Returns an empty string
2056− * when [dayKey] is empty (no timestamp) so no separator is rendered for un-timestamped
2059−private fun dayLabel(
2062− today: java.time.LocalDate,
2063− todayLabel: String,
2064− yesterdayLabel: String,
2065− dateFmt: java.text.DateFormat,
2067− if (dayKey.isEmpty()) return ""
2068− val epochDay = dayKey.toLongOrNull() ?: return ""
2069− val date = java.time.LocalDate.ofEpochDay(epochDay)
2071− date == today -> todayLabel
2072− date == today.minusDays(1) -> yesterdayLabel
2073− else -> dateFmt.format(java.util.Date(ts))
2078− * A centered day divider in the message list. Renders nothing for an empty label
2079− * (the no-timestamp case) so un-timestamped messages don't get a stray blank divider.
2082−private fun DateSeparator(label: String) {
2083− if (label.isBlank()) return
2085− modifier = Modifier.fillMaxWidth(),
2086− horizontalArrangement = Arrangement.Center,
2089− color = MaterialTheme.colorScheme.surfaceVariant,
2090− shape = MaterialTheme.shapes.small,
2094− style = MaterialTheme.typography.labelSmall,
2095− color = MaterialTheme.colorScheme.onSurfaceVariant,
2096− modifier = Modifier.padding(horizontal = 12.dp, vertical = 4.dp),