@@ -1,2082 +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.copyToClipboard
149−import soy.iko.opencode.ui.components.LocalRelativeTimeTick
150−import soy.iko.opencode.ui.components.rememberRelativeTimeTick
151−import soy.iko.opencode.ui.components.showToast
152−import soy.iko.opencode.ui.components.toImageContext
153−import soy.iko.opencode.ui.vmFactory
154−import soy.iko.opencode.util.runCatchingCancellable
156−@OptIn(ExperimentalMaterial3Api::class)
159− container: AppContainer,
162− onOpenFile: ((String) -> Unit)? = null,
163− onOpenSession: ((String) -> Unit)? = null,
165− val vm: ChatViewModel = viewModel(key = sessionId, factory = vmFactory { ChatViewModel(container, sessionId) })
166− val hasMessages by vm.hasMessages.collectAsStateWithLifecycle()
167− val running by vm.running.collectAsStateWithLifecycle()
168− val aborting by vm.aborting.collectAsStateWithLifecycle()
169− val loading by vm.loading.collectAsStateWithLifecycle()
170− val loadError by vm.loadError.collectAsStateWithLifecycle()
171− val refreshing by vm.refreshing.collectAsStateWithLifecycle()
172− val models by vm.models.collectAsStateWithLifecycle()
173− val modelsLoading by vm.modelsLoading.collectAsStateWithLifecycle()
174− val modelsError by vm.modelsError.collectAsStateWithLifecycle()
175− val selectedModel by vm.selectedModel.collectAsStateWithLifecycle()
176− val connectionState by vm.connectionState.collectAsStateWithLifecycle()
177− val pendingPermission by vm.pendingPermission.collectAsStateWithLifecycle()
178− val permissionProgress by vm.permissionProgress.collectAsStateWithLifecycle()
179− val agents by vm.agents.collectAsStateWithLifecycle()
180− val agentsLoading by vm.agentsLoading.collectAsStateWithLifecycle()
181− val agentsError by vm.agentsError.collectAsStateWithLifecycle()
182− val selectedAgent by vm.selectedAgent.collectAsStateWithLifecycle()
183− val commands by vm.commands.collectAsStateWithLifecycle()
184− val commandsLoading by vm.commandsLoading.collectAsStateWithLifecycle()
185− val commandsError by vm.commandsError.collectAsStateWithLifecycle()
186− val sessionTitle by vm.sessionTitle.collectAsStateWithLifecycle()
187− val sessionDeleted by vm.sessionDeleted.collectAsStateWithLifecycle()
188− val draft by vm.draft.collectAsStateWithLifecycle()
189− val attachments by vm.attachments.collectAsStateWithLifecycle()
190− val reverted by vm.reverted.collectAsStateWithLifecycle()
191− val shareUrl by vm.shareUrl.collectAsStateWithLifecycle()
192− val reconnecting by vm.reconnecting.collectAsStateWithLifecycle()
193− val sendOnEnter by container.settingsStore.sendOnEnter.collectAsStateWithLifecycle(initialValue = true)
194− val isOnline by container.isOnline.collectAsStateWithLifecycle()
195− val haptics = LocalHapticFeedback.current
196− val scope = rememberCoroutineScope()
197− val shareContext = LocalContext.current
198− val defaultShareSubject = stringResource(R.string.share_subject)
199− val sessionLabel = stringResource(R.string.session)
200− val defaultModelLabel = stringResource(R.string.default_model)
201− val subtitle = remember(selectedModel?.modelLabel, selectedAgent, defaultModelLabel) {
203− append(selectedModel?.modelLabel ?: defaultModelLabel)
204− selectedAgent?.let { append(" · $it") }
208− // Connection profile (with auth) for rendering inline image attachments.
209− // Collect as state so a server switch recomposes the image context.
210− val activeConnection by container.activeConnection.collectAsStateWithLifecycle()
211− val imageContext = remember(activeConnection?.profile) {
212− activeConnection?.profile?.toImageContext()
215− // Mark this session as read while the user is viewing it; clear on leave so new
216− // background activity can badge it again.
217− DisposableEffect(sessionId) {
218− container.setCurrentSession(sessionId)
219− onDispose { if (container.currentSession.value == sessionId) container.setCurrentSession(null) }
222− // Navigate away when the session is deleted via SSE so the user isn't left
223− // on a zombie screen showing a conversation that no longer exists. Surface a
224− // toast (not a snackbar) because the screen is about to be popped — a snackbar
225− // would be torn down before the user could read it, while a toast survives.
226− // Covers both SSE-driven deletion (deleted on another device) and a user-
227− // initiated delete from the chat overflow menu (deleteSession in ChatViewModel
228− // sets the same flag on success).
229− val deletedContext = LocalContext.current
230− LaunchedEffect(sessionDeleted) {
231− if (sessionDeleted) {
232− showToast(deletedContext, deletedContext.getString(R.string.session_deleted_chat))
237− val snackbar = remember { SnackbarHostState() }
238− val retryLabel = stringResource(R.string.retry)
239− val inputFocusRequester = remember { androidx.compose.ui.focus.FocusRequester() }
240− var showModelPicker by rememberSaveable { mutableStateOf(false) }
241− var showAgentPicker by rememberSaveable { mutableStateOf(false) }
242− var showTitleMenu by rememberSaveable { mutableStateOf(false) }
243− var showCommandPicker by rememberSaveable { mutableStateOf(false) }
244− var showExitConfirm by rememberSaveable { mutableStateOf(false) }
245− var showStopConfirm by rememberSaveable { mutableStateOf(false) }
246− var showOverflowMenu by rememberSaveable { mutableStateOf(false) }
247− var showRenameDialog by rememberSaveable { mutableStateOf(false) }
248− var showDeleteDialog by rememberSaveable { mutableStateOf(false) }
249− var showShellDialog by rememberSaveable { mutableStateOf(false) }
250− var showPalette by rememberSaveable { mutableStateOf(false) }
251− // Summarize and init (generate AGENTS.md) are irreversible, so a single tap is gated behind
252− // a confirmation dialog (from both the overflow menu and the command palette).
253− var showSummarizeConfirm by rememberSaveable { mutableStateOf(false) }
254− var showInitConfirm by rememberSaveable { mutableStateOf(false) }
256− // Command-palette entries (keyboard-first: Ctrl+K). Labels resolved here so the remembered
257− // action list doesn't need a Composable context. Actions map to the same handlers the
258− // overflow menu drives, so the palette is a keyboard shortcut to them, not a parallel path.
259− val paletteModelLabel = stringResource(R.string.palette_switch_model)
260− val paletteAgentLabel = stringResource(R.string.palette_choose_agent)
261− val paletteCommandLabel = stringResource(R.string.palette_run_command)
262− val paletteSummarizeLabel = stringResource(R.string.palette_summarize)
263− val paletteRenameLabel = stringResource(R.string.rename_session_chat)
264− val paletteShellLabel = stringResource(R.string.run_shell_command)
265− val paletteActions = remember(
266− paletteModelLabel, paletteAgentLabel, paletteCommandLabel,
267− paletteSummarizeLabel, paletteRenameLabel, paletteShellLabel, hasMessages, running,
270− add(PaletteAction("model", paletteModelLabel) { showModelPicker = true })
271− add(PaletteAction("agent", paletteAgentLabel) { showAgentPicker = true })
272− add(PaletteAction("command", paletteCommandLabel) { showCommandPicker = true })
273− if (hasMessages && !running) add(PaletteAction("summarize", paletteSummarizeLabel) { showSummarizeConfirm = true })
274− if (!running) add(PaletteAction("shell", paletteShellLabel) { showShellDialog = true })
275− add(PaletteAction("rename", paletteRenameLabel) { showRenameDialog = true })
279− // Keep the screen awake while the agent is working in *this* session. The foreground
280− // service that holds process priority during a run is managed app-wide off
281− // container.anyRunActive (see OpencodeApp) so it survives navigating away from the chat
282− // mid-run — otherwise leaving the screen would drop priority and Doze could choke the
283− // SSE stream before the completion notification fires.
284− val currentView = LocalView.current
285− val appContext = LocalContext.current.applicationContext
286− DisposableEffect(running) {
287− currentView.keepScreenOn = running
288− onDispose { currentView.keepScreenOn = false }
291− LaunchedEffect(Unit) {
292− vm.errorEvents.collect { event ->
293− // Only a failed *send* is retryable; attaching Retry to any other error (e.g. a
294− // message-load failure) would silently re-submit the last prompt on tap.
295− val result = if (event.retryable) {
296− snackbar.showSnackbar(message = event.message, actionLabel = retryLabel)
298− snackbar.showSnackbar(event.message)
300− if (result == androidx.compose.material3.SnackbarResult.ActionPerformed) vm.retryFailed()
304− // In-place Undo for a user-initiated session delete. The delete is deferred for an undo
305− // window on the container; show the snackbar over the conversation the user is viewing so
306− // they can cancel without being navigated to the session list first. If the window expires
307− // the scheduled delete sets `sessionDeleted` and the effect below navigates away.
308− val undoLabel = stringResource(R.string.undo)
309− val sessionDeletedLabel = stringResource(R.string.session_deleted_chat)
310− LaunchedEffect(Unit) {
311− vm.deleteUndoEvents.collect {
313− val dismisser = launch {
314− delay(NetworkConfig.undoDeleteDelayMs)
315− snackbar.currentSnackbarData?.dismiss()
317− val result = snackbar.showSnackbar(
318− message = sessionDeletedLabel,
319− actionLabel = undoLabel,
320− duration = SnackbarDuration.Indefinite,
323− if (result == SnackbarResult.ActionPerformed) vm.cancelSessionDelete()
328− // --- Attachments, voice, and share-link plumbing ---
329− val attachTooLargeMsg = stringResource(R.string.attachment_too_large)
330− val attachFailedMsg = stringResource(R.string.attachment_failed)
331− val attachLimitMsg = stringResource(R.string.attachment_limit)
332− val noCameraMsg = stringResource(R.string.no_camera_app)
333− val noVoiceMsg = stringResource(R.string.no_voice_app)
334− val voicePrompt = stringResource(R.string.voice_prompt)
335− val linkCopiedMsg = stringResource(R.string.link_copied)
337− // Count of picks currently being read + base64-encoded off the main thread, so the
338− // composer can show a staging placeholder immediately (chips only materialize once done).
339− var stagingCount by remember { mutableStateOf(0) }
341− // Convert each picked Uri to a base64 attachment off the main thread, honoring the
342− // per-prompt count cap and surfacing per-file errors without aborting the batch.
343− fun stageUris(uris: List<Uri>) {
344− if (uris.isEmpty()) return
349− if (vm.attachments.value.size >= NetworkConfig.maxAttachments) {
350− snackbar.showSnackbar(attachLimitMsg)
353− when (val result = uri.toAttachmentResult(appContext)) {
354− is AttachmentResult.Ok -> vm.addAttachment(result.attachment)
355− AttachmentResult.TooLarge -> snackbar.showSnackbar(attachTooLargeMsg)
356− AttachmentResult.Failed -> snackbar.showSnackbar(attachFailedMsg)
365− val photoPicker = rememberLauncherForActivityResult(
366− ActivityResultContracts.PickMultipleVisualMedia(NetworkConfig.maxAttachments),
367− ) { uris -> stageUris(uris) }
369− val filePicker = rememberLauncherForActivityResult(
370− ActivityResultContracts.GetMultipleContents(),
371− ) { uris -> stageUris(uris) }
373− // Uri survives a config change mid-capture so the TakePicture result still resolves.
374− var pendingCaptureUri by rememberSaveable { mutableStateOf<Uri?>(null) }
375− val cameraLauncher = rememberLauncherForActivityResult(
376− ActivityResultContracts.TakePicture(),
378− val uri = pendingCaptureUri
379− pendingCaptureUri = null
380− if (success && uri != null) stageUris(listOf(uri))
383− val voiceLauncher = rememberLauncherForActivityResult(
384− ActivityResultContracts.StartActivityForResult(),
386− if (result.resultCode == Activity.RESULT_OK) {
387− val spoken = result.data
388− ?.getStringArrayListExtra(RecognizerIntent.EXTRA_RESULTS)
390− ?.takeIf { it.isNotBlank() }
391− if (spoken != null) {
392− // Append to the existing draft rather than replacing, so dictation adds to
393− // whatever the user already typed.
394− val current = vm.draft.value
395− val combined = if (current.isBlank()) spoken else "$current $spoken"
396− vm.updateDraft(combined.take(NetworkConfig.maxDraftLengthChars))
401− fun launchCamera() {
402− val uri = newCameraCaptureUri(appContext)
404− scope.launch { snackbar.showSnackbar(attachFailedMsg) }
407− pendingCaptureUri = uri
408− runCatching { cameraLauncher.launch(uri) }
409− .onFailure { pendingCaptureUri = null; scope.launch { snackbar.showSnackbar(noCameraMsg) } }
413− val intent = Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH).apply {
414− putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL, RecognizerIntent.LANGUAGE_MODEL_FREE_FORM)
415− putExtra(RecognizerIntent.EXTRA_PROMPT, voicePrompt)
417− runCatching { voiceLauncher.launch(intent) }
418− .onFailure { scope.launch { snackbar.showSnackbar(noVoiceMsg) } }
421− // A freshly-created share link is copied to the clipboard so the user can paste it right away.
422− LaunchedEffect(Unit) {
423− vm.shareLinkEvents.collect { url ->
424− copyToClipboard(shareContext, shareContext.getString(R.string.clip_label_share), url)
425− snackbar.showSnackbar(linkCopiedMsg)
429− // Navigate to a session freshly branched from a message (branchFrom), once it's created.
430− // Keyed on Unit (like the sibling one-shot collectors above): keying on the onOpenSession
431− // lambda would cancel/restart this collector whenever the lambda's identity changes, risking
432− // a dropped branch-navigation event in the gap.
433− val branchedMsg = stringResource(R.string.branch_created)
434− LaunchedEffect(Unit) {
435− vm.branchEvents.collect { newId ->
436− showToast(shareContext, branchedMsg)
437− onOpenSession?.invoke(newId)
441− // Stage images shared into the app (via the system share sheet) as attachments.
442− // Keyed on pendingSharedMedia (not Unit) so the effect re-fires when new media arrives
443− // while this ChatScreen is already composed — which happens in two-pane mode, where the
444− // detail ChatScreen is persistent (keyed on sessionId) and a LaunchedEffect(Unit) would
445− // only fire on first composition. consumePendingSharedMedia() atomically drains the
446− // pending list (compareAndSet to empty), so re-firing on the now-empty value is a no-op.
447− val pendingSharedMedia by container.pendingSharedMedia.collectAsStateWithLifecycle()
448− LaunchedEffect(pendingSharedMedia) {
449− val shared = container.consumePendingSharedMedia()
450− if (shared.isNotEmpty()) stageUris(shared.map { Uri.parse(it) })
454− if (vm.send(draft)) {
455− // TextHandleMove (a light tick) is semantically right for a send commit;
456− // LongPress is reserved for long-press/swipe gestures.
457− haptics.performHapticFeedback(androidx.compose.ui.hapticfeedback.HapticFeedbackType.TextHandleMove)
461− BackHandler(enabled = running && !showModelPicker && !showAgentPicker && !showCommandPicker) { showExitConfirm = true }
464− // Hardware-keyboard shortcuts (tablets / DeX / Chromebooks): Ctrl+K opens the command
465− // palette; Escape closes it, or stops a run. onPreviewKeyEvent on the Scaffold root sees
466− // events before the focused text field, but only Ctrl+K / Escape are consumed so normal
467− // typing (and the composer's own Enter-to-send handling) is untouched.
468− modifier = Modifier.onPreviewKeyEvent { ev ->
469− if (ev.type != KeyEventType.KeyDown) return@onPreviewKeyEvent false
471− ev.isCtrlPressed && ev.key == Key.K -> { showPalette = true; true }
472− ev.key == Key.Escape && showPalette -> { showPalette = false; true }
473− ev.key == Key.Escape && running && !showStopConfirm && !showExitConfirm -> {
474− showStopConfirm = true; true
482− val changeLabel = stringResource(R.string.change_model_agent)
483− // The subtitle reads "model · agent", so tapping the title offers *both*
484− // — a small menu picks which picker to open. Previously the tap went
485− // straight to the model picker, leaving the agent changeable only via
486− // the overflow menu despite the title implying otherwise.
489− // mergeDescendants so TalkBack reads the title/subtitle Texts as one
490− // node; the click label rides on `clickable` (onClickLabel) instead of
491− // an explicit contentDescription, which would have SUPPRESSED the child
492− // Texts and announced only "Change model and agent".
496− onClickLabel = changeLabel,
497− ) { showTitleMenu = true }
498− .semantics(mergeDescendants = true) {},
499− verticalAlignment = Alignment.CenterVertically,
501− Column(modifier = Modifier.weight(1f, fill = false)) {
502− // maxLines=1 + Ellipsis so a long session title can't wrap and
503− // push the top bar to multiple lines, shifting the whole layout.
505− sessionTitle ?: sessionLabel,
507− overflow = TextOverflow.Ellipsis,
511− style = MaterialTheme.typography.labelSmall,
512− color = MaterialTheme.colorScheme.onSurfaceVariant,
514− overflow = TextOverflow.Ellipsis,
517− // Always show the affordance so the title reads as tappable even when
518− // the model catalog failed to load (models empty). Without it the title
519− // is indistinguishable from plain text and the pickers are effectively
520− // undiscoverable — and the dropdown items already disable themselves
521− // while a catalog is loading or unavailable.
523− Icons.Filled.KeyboardArrowDown,
524− contentDescription = null,
525− tint = MaterialTheme.colorScheme.onSurfaceVariant,
526− modifier = Modifier.size(20.dp),
529− DropdownMenu(expanded = showTitleMenu, onDismissRequest = { showTitleMenu = false }) {
531− text = { Text(stringResource(R.string.palette_switch_model)) },
532− enabled = !modelsLoading || models.isNotEmpty(),
533− onClick = { showTitleMenu = false; showModelPicker = true },
536− text = { Text(stringResource(R.string.palette_choose_agent)) },
537− enabled = !agentsLoading || agents.isNotEmpty(),
538− onClick = { showTitleMenu = false; showAgentPicker = true },
544− IconButton(onClick = {
545− if (running) showExitConfirm = true else onBack()
547− Icon(Icons.AutoMirrored.Filled.ArrowBack, contentDescription = stringResource(R.string.back))
551− // At-a-glance run status in the top bar. When the user is scrolled
552− // up (jump-to-latest FAB visible), the input-bar Stop button and the
553− // trailing "working…" row are off-screen, so a top-bar spinner is the
554− // only signal the agent is still working.
556− val workingLabel = stringResource(R.string.working)
557− CircularProgressIndicator(
558− Modifier.size(18.dp).semantics { contentDescription = workingLabel },
562− // Manual refresh: forces an SSE reconnect, which re-seeds messages
563− // from REST. A recovery path when the stream silently drops and the
564− // auto-reconnect re-seed is slow or fails. Shows a brief spinner as
565− // immediate tap feedback — the SSE reconnect may not visibly change
566− // the connection state when already Connected, so without it the tap
567− // appears to do nothing.
568− val refreshLabel = stringResource(R.string.refresh)
570− onClick = { vm.refreshMessages() },
571− enabled = activeConnection != null && !refreshing,
574− CircularProgressIndicator(
575− Modifier.size(18.dp).semantics { contentDescription = refreshLabel },
579− Icon(Icons.Filled.Refresh, contentDescription = refreshLabel)
582− // Overflow menu consolidates the less-frequent actions (share,
583− // commands, agent, model, rename, delete) so the top bar stays
584− // scannable on narrow phones — previously 5 icons crowded the bar
585− // alongside the back button and tappable title. Catalog-loading
586− // spinners stay inline (next to the overflow) so a load state is
587− // visible without opening the menu.
588− val moreLabel = stringResource(R.string.more)
589− val loadingLabel = stringResource(R.string.loading)
590− val shareLabel = stringResource(R.string.share_conversation)
591− val commandsLabel = stringResource(R.string.commands)
592− val renameLabel = stringResource(R.string.rename_session_chat)
593− val deleteLabel = stringResource(R.string.delete_session_chat)
594− val createShareLabel = stringResource(R.string.create_share_link)
595− val copyShareLabel = stringResource(R.string.copy_share_link)
596− val stopShareLabel = stringResource(R.string.stop_sharing)
597− val summarizeLabel = stringResource(R.string.summarize_conversation)
598− val initLabel = stringResource(R.string.generate_agents_md)
599− val shellLabel = stringResource(R.string.run_shell_command)
601− IconButton(onClick = { showOverflowMenu = true }) {
602− Icon(Icons.Filled.MoreVert, contentDescription = moreLabel)
605− expanded = showOverflowMenu,
606− onDismissRequest = { showOverflowMenu = false },
609− text = { Text(shareLabel) },
610− enabled = hasMessages,
612− showOverflowMenu = false
614− val md = withContext(Dispatchers.Default) {
615− buildConversationMarkdown(vm.messages.value, sessionTitle)
617− val send = android.content.Intent(android.content.Intent.ACTION_SEND).apply {
618− type = "text/markdown"
619− putExtra(android.content.Intent.EXTRA_SUBJECT, sessionTitle ?: defaultShareSubject)
620− putExtra(android.content.Intent.EXTRA_TEXT, md)
622− runCatchingCancellable { shareContext.startActivity(android.content.Intent.createChooser(send, shareLabel)) }
623− .onFailure { showToast(shareContext, shareContext.getString(R.string.no_share_app)) }
628− text = { Text(commandsLabel) },
629− enabled = !commandsLoading || commands.isNotEmpty(),
630− onClick = { showOverflowMenu = false; showCommandPicker = true },
632− androidx.compose.material3.HorizontalDivider()
633− // Session sharing: create a public link, copy an existing one, or revoke it.
634− if (shareUrl == null) {
636− text = { Text(createShareLabel) },
637− enabled = hasMessages,
638− onClick = { showOverflowMenu = false; vm.shareSession() },
642− text = { Text(copyShareLabel) },
644− showOverflowMenu = false
646− copyToClipboard(shareContext, shareContext.getString(R.string.clip_label_share), it)
647− scope.launch { snackbar.showSnackbar(linkCopiedMsg) }
652− text = { Text(stopShareLabel) },
653− onClick = { showOverflowMenu = false; vm.unshareSession() },
657− text = { Text(summarizeLabel) },
658− enabled = hasMessages && !running,
659− onClick = { showOverflowMenu = false; showSummarizeConfirm = true },
662− text = { Text(initLabel) },
664− onClick = { showOverflowMenu = false; showInitConfirm = true },
667− text = { Text(shellLabel) },
669− onClick = { showOverflowMenu = false; showShellDialog = true },
671− androidx.compose.material3.HorizontalDivider()
673− text = { Text(renameLabel) },
674− onClick = { showOverflowMenu = false; showRenameDialog = true },
677− text = { Text(deleteLabel, color = MaterialTheme.colorScheme.error) },
678− onClick = { showOverflowMenu = false; showDeleteDialog = true },
681− // While a catalog is initially loading (empty list + loading flag),
682− // show a tiny inline spinner beside the overflow so the user can see
683− // a load is in progress without opening the menu. Once loaded the
684− // spinner disappears; the menu items are always enabled (tapping a
685− // picker with no items shows the "no models/agents/commands" state).
686− val catalogLoading = (commandsLoading && commands.isEmpty()) ||
687− (agentsLoading && agents.isEmpty()) ||
688− (modelsLoading && models.isEmpty())
689− if (catalogLoading) {
690− CircularProgressIndicator(
692− .align(Alignment.TopEnd)
694− .semantics { contentDescription = loadingLabel },
702− snackbarHost = { SnackbarHost(snackbar) },
704− val queuedFollowUp by vm.queuedFollowUp.collectAsStateWithLifecycle()
705− val todoPlan by vm.todoPlan.collectAsStateWithLifecycle()
706− val queuedOffline by vm.outbox.collectAsStateWithLifecycle()
707− val outboxSending by container.outboxSending.collectAsStateWithLifecycle()
709− // Pinned above the composer so the agent's plan and progress stay visible
710− // while scrolled up mid-run; renders nothing when there's no plan.
711− TodoPlanBar(todoPlan)
712− AnimatedVisibility(visible = reverted) {
713− RevertBanner(onUndo = { vm.unrevert() })
715− AnimatedVisibility(visible = queuedOffline.isNotEmpty()) {
717− count = queuedOffline.size,
718− sending = outboxSending,
719− onFlush = { vm.flushQueued() },
720− onDiscard = { vm.discardAllQueued() },
725− onValueChange = vm::updateDraft,
727− aborting = aborting,
728− enabled = activeConnection != null,
729− sendOnEnter = sendOnEnter,
731− onAbort = { showStopConfirm = true },
732− queuedFollowUp = queuedFollowUp,
733− onQueueFollowUp = vm::queueFollowUp,
734− onCancelQueue = { vm.queueFollowUp("") },
735− focusRequester = inputFocusRequester,
736− attachments = attachments,
737− staging = stagingCount > 0,
738− onRemoveAttachment = vm::removeAttachment,
741− PickVisualMediaRequest(ActivityResultContracts.PickVisualMedia.ImageOnly),
744− onPickFile = { filePicker.launch("*/*") },
745− onCamera = { launchCamera() },
746− onVoice = { launchVoice() },
751− // Collect messages inside the content lambda so streaming token updates
752− // recompose only this subtree, not the top bar / input bar / 20+ other
753− // state reads in the ChatScreen body.
754− val messages by vm.messages.collectAsStateWithLifecycle()
755− val optimisticStatuses by vm.optimisticStatuses.collectAsStateWithLifecycle()
756− val listState = rememberLazyListState()
757− val contentScope = rememberCoroutineScope()
758− val timeTick = rememberRelativeTimeTick()
759− // Dismiss the soft keyboard when the user scrolls the message list, a standard Android
760− // chat affordance for reading while the IME is open. Watching isScrollInProgress via
761− // snapshotFlow avoids wiring a nested scroll connection and fires on any scroll gesture.
762− val keyboardController = androidx.compose.ui.platform.LocalSoftwareKeyboardController.current
763− androidx.compose.runtime.LaunchedEffect(listState) {
764− androidx.compose.runtime.snapshotFlow { listState.isScrollInProgress }
765− .distinctUntilChanged()
766− .collect { scrolling -> if (scrolling) keyboardController?.hide() }
767− } // Group messages by day and interleave date separators so a long conversation
768− // has visual "Today"/"Yesterday"/date breaks. Computed once per messages
769− // emission (memoized) so a scroll-induced recomposition doesn't re-scan. Lives
770− // outside the PullToRefreshBox so the auto-scroll effects below can reference
771− // the same list the LazyColumn renders (separators shift the indices vs. the
772− // raw messages list, so scroll targets must be in listItems space).
773− val todayLabel = stringResource(R.string.today)
774− val yesterdayLabel = stringResource(R.string.yesterday)
775− val listItems = remember(messages, todayLabel, yesterdayLabel) {
776− buildMessageListItems(messages, todayLabel, yesterdayLabel)
778− // listItems is a plain (non-snapshot) local, rebuilt each recomposition. The
779− // derivedStateOf and snapshotFlow lambdas below are created once (keyless
780− // remember / LaunchedEffect(Unit)); reading `listItems` directly inside them
781− // would capture the first composition's list — which is empty, since `messages`
782− // starts empty — freezing it forever. That pinned isPinnedToBottom at true and
783− // AutoScrollSignal.size at 0, breaking streaming auto-scroll and the
784− // jump-to-latest FAB. rememberUpdatedState hands those lambdas a stable State
785− // whose value tracks the latest list.
786− val currentListItems by rememberUpdatedState(listItems)
788− // New-content signal for the jump-to-latest FAB: set when content grows while the user
789− // is scrolled away from the bottom, cleared once they return (see the collector below).
790− var hasNewContent by remember { mutableStateOf(false) }
792− val isPinnedToBottom by remember {
794− val lastVisible = listState.layoutInfo.visibleItemsInfo.lastOrNull()?.index ?: -1
795− // When a run is active, the LazyColumn has one trailing "__typing"
796− // item after the last list item. Account for it so "pinned to bottom"
797− // includes the working indicator — otherwise the pin check targets
798− // listItems.lastIndex, the typing row sits just below the viewport,
799− // and the user never sees the progress indicator even when pinned.
800− val items = currentListItems
801− val effectiveLast = if (running) items.size else items.lastIndex
802− lastVisible >= effectiveLast || items.isEmpty()
806− // Jump to the newest message once, when the conversation first loads. Guarded by a
807− // saveable one-shot flag so it doesn't re-fire on recomposition after a config change
808− // (rotation) — rememberLazyListState restores the user's scroll offset, and an
809− // unconditional scrollToItem here would clobber it, snapping them back to the bottom.
810− var didInitialScroll by rememberSaveable { mutableStateOf(false) }
811− LaunchedEffect(listItems.isNotEmpty()) {
812− if (listItems.isNotEmpty() && !didInitialScroll) {
813− // When a run is active the LazyColumn has a trailing "__typing" row at
814− // listItems.size; target it (not listItems.lastIndex) so deep-linking into a
815− // running session lands truly pinned to bottom and streaming auto-scroll engages.
816− listState.scrollToItem(if (running) listItems.size else listItems.lastIndex)
817− didInitialScroll = true
821− // When a run starts, the LazyColumn gains a trailing "__typing" row, so
822− // effectiveLast jumps from listItems.lastIndex to listItems.size and the
823− // isPinnedToBottom check flips to false the instant you send — freezing
824− // auto-scroll. If the user was pinned to the last item just before the run
825− // began, bring the typing row into view so the pin (and streaming follow) is
826− // preserved. Guard on the raw last-visible index (isPinnedToBottom has already
827− // recomputed to false by now) so we don't scroll when the user had scrolled up.
828− LaunchedEffect(running) {
829− if (running && listItems.isNotEmpty()) {
830− val lastVisible = listState.layoutInfo.visibleItemsInfo.lastOrNull()?.index ?: -1
831− if (lastVisible >= listItems.lastIndex) {
832− runCatchingCancellable { listState.animateScrollToItem(listItems.size) }
837− LaunchedEffect(Unit) {
841− // Track list size + the streaming length of the last part so we auto-scroll
842− // as content arrives, plus the pinned flag. A small data class with primitive
843− // fields avoids the per-frame boxing that Triple<Int,Int,Boolean> pays
844− // (snapshotFlow re-evaluates this lambda every snapshot), and reading only the
845− // last part's length is O(1) vs. a sumOf over every part. Covering reasoning
846− // and tool output — not just TextPart — keeps a pinned view following a long
847− // reasoning/tool block while it streams (previously it stalled at 0).
848− val lastLen = streamingContentLength(messages.lastOrNull()?.parts?.lastOrNull())
849− AutoScrollSignal(currentListItems.size, lastLen, isPinnedToBottom)
850− }.collect { signal ->
851− if (signal.pinned) {
852− // Back at the bottom: clear the new-content badge.
853− hasNewContent = false
854− if (signal.size > 0) {
855− // Scroll to the effective last index, including the trailing
856− // "__typing" row when a run is active so the working indicator
857− // is brought into view (not just the last message).
858− val items = currentListItems
859− val target = if (running) items.size else items.lastIndex
860− listState.scrollToItem(target)
862− } else if (signal.size > prevSize || signal.lastTextLength > prevLen) {
863− // Content arrived while scrolled up — badge the jump-to-latest FAB.
864− hasNewContent = true
866− prevSize = signal.size
867− prevLen = signal.lastTextLength
871− CompositionLocalProvider(LocalRelativeTimeTick provides timeTick) {
872− // The bottomBar (ChatInputBar) already has imePadding, and the Scaffold's
873− // content padding accounts for the bottomBar's raised height, so the message
874− // list is already above the keyboard. Adding imePadding here would double-apply
875− // the IME inset and push messages too far up.
876− Box(modifier = Modifier.fillMaxSize().padding(padding)) {
877− if (activeConnection == null) {
879− modifier = Modifier.align(Alignment.Center).padding(24.dp),
880− horizontalAlignment = Alignment.CenterHorizontally,
883− stringResource(R.string.not_connected),
884− color = MaterialTheme.colorScheme.error,
886− Spacer(Modifier.size(12.dp))
887− Button(onClick = { vm.reconnect() }, enabled = !reconnecting) {
889− CircularProgressIndicator(
890− Modifier.size(20.dp),
891− color = MaterialTheme.colorScheme.onPrimary,
895− Text(stringResource(R.string.reconnect))
900− val bannerVisible = !isOnline || connectionState != EventStreamClient.ConnectionState.Connected
901− // Measure the banner's actual height instead of hardcoding 44dp. At large
902− // accessibility font scales the banner's labelMedium text + spinner + Retry
903− // button exceed 44dp, so a fixed inset lets the first message hide behind it
904− // (the same hazard FileViewScreen's overlay calls out). onSizeChanged only
905− // fires while the banner is composed (visible), so gate the inset on
906− // bannerVisible and fall back to 44dp until the first measurement arrives.
907− var bannerHeightPx by remember { mutableIntStateOf(0) }
908− val density = LocalDensity.current
909− val topPad = if (bannerVisible) {
910− if (bannerHeightPx > 0) {
911− with(density) { bannerHeightPx.toDp() } + 4.dp
919− state = connectionState,
920− modifier = Modifier.align(Alignment.TopCenter).onSizeChanged { bannerHeightPx = it.height },
921− isOnline = isOnline,
922− // On a hard failure, retry by forcing an SSE reconnect (which
923− // re-seeds from REST). refreshMessages is the right recovery path
924− // when the connection is present but the stream died; reconnect()
925− // is the path when the whole connection is gone (handled by the
926− // separate "Not connected" state below).
927− onRetry = { vm.refreshMessages() },
929− // Pull-to-refresh wraps ALL content states (loading, error, empty, list) so
930− // recovery is a swipe away everywhere — not just when the message list is
931− // populated. Previously PTR was only around the populated list, leaving the
932− // error/loading states reachable only via a button tap.
934− isRefreshing = refreshing,
935− onRefresh = { vm.refreshMessages() },
936− // Cap width and center on large screens for readability — full-width
937− // bubbles stretch edge-to-edge on tablets, hurting line-length comfort.
938− modifier = Modifier.fillMaxSize().wrapContentWidth(Alignment.CenterHorizontally)
939− .widthIn(max = NetworkConfig.chatContentMaxWidthDp.dp),
941− // Reserve top space when the banner is visible so it doesn't overlap the
942− // first message / state content. (topPad computed above.)
943− if (loading && messages.isEmpty()) {
944− val loadingLabel = stringResource(R.string.loading)
945− // Attach the a11y label directly to the spinner (a detached zero-size Box
946− // isn't reliably focused/announced by TalkBack) and show a visible label so
947− // sighted users get "Loading…" rather than a bare spinner.
949− modifier = Modifier.align(Alignment.Center).padding(top = topPad),
950− horizontalAlignment = Alignment.CenterHorizontally,
952− CircularProgressIndicator(
953− Modifier.semantics { contentDescription = loadingLabel },
956− Spacer(Modifier.size(8.dp))
959− style = MaterialTheme.typography.labelMedium,
960− color = MaterialTheme.colorScheme.onSurfaceVariant,
963− } else if (loadError && messages.isEmpty()) {
964− // A failed load with nothing to show. Distinct from the empty
965− // conversation state below — the conversation isn't empty, it
966− // failed to load, and offering "Start a conversation" here is
967− // misleading. Offer a Retry instead, mirroring SessionListScreen.
969− modifier = Modifier.align(Alignment.Center).padding(top = topPad).padding(24.dp),
970− horizontalAlignment = Alignment.CenterHorizontally,
973− stringResource(R.string.load_messages_failed),
974− color = MaterialTheme.colorScheme.error,
976− Spacer(Modifier.size(12.dp))
977− Button(onClick = { vm.refreshMessages() }) {
978− Text(stringResource(R.string.retry))
981− } else if (messages.isEmpty() && running) {
982− // A run just started but no parts have arrived yet — the empty
983− // list with only the trailing "working…" row looks broken, so
984− // surface a clear starting state until the first part streams in.
985− val workingText = stringResource(R.string.working)
987− modifier = Modifier.align(Alignment.Center).padding(top = topPad).padding(24.dp),
988− horizontalAlignment = Alignment.CenterHorizontally,
990− CircularProgressIndicator(Modifier.size(28.dp), strokeWidth = 3.dp)
991− Spacer(Modifier.size(12.dp))
992− Text(workingText, style = MaterialTheme.typography.bodyMedium, color = MaterialTheme.colorScheme.onSurfaceVariant)
994− } else if (messages.isEmpty()) {
998− // Focus the input so the user can edit the suggestion before
999− // sending, instead of having to manually tap the field.
1000− runCatching { inputFocusRequester.requestFocus() }
1002− modifier = Modifier.align(Alignment.Center).padding(top = topPad),
1005− val lastMessageId = messages.lastOrNull()?.info?.id
1006− // Text-to-speech for reading assistant replies aloud; shuts down when the
1007− // message list leaves composition.
1008− val tts = rememberTtsController()
1009− val speakingMessageId by tts.speakingId
1012− modifier = Modifier.fillMaxSize(),
1013− // Extra bottom padding reserves room for the jump-to-latest FAB so it
1014− // never floats over the last message. Top padding grows when the
1015− // connection banner is visible so it doesn't overlap the first message.
1016− contentPadding = PaddingValues(
1020− bottom = 16.dp + NetworkConfig.chatListFabInsetDp.dp,
1022− verticalArrangement = Arrangement.spacedBy(16.dp),
1027− contentType = { it.contentType },
1029− // Default placement animation so inserted/moved rows glide in. Kept to the
1030− // default (no heavy fade spec) so a streaming message growing in place
1031− // doesn't animate on every token.
1032− Box(Modifier.animateItem()) {
1034− is MessageListItem.Separator -> DateSeparator(item.label)
1035− is MessageListItem.Message -> {
1036− val message = item.message
1037− // Only the last (streaming) message needs isRunning — it drives the
1038− // reasoning-block spinner. Passing the live flag to every bubble
1039− // makes all visible messages recompose whenever a run starts or stops.
1040− val modelLabel = remember(message.info, models) {
1041− (message.info as? soy.iko.opencode.data.model.AssistantMessage)
1042− ?.let { resolveModelLabel(it, models) }
1044− // Text used to drive swipe-to-reply (and pre-fill the quote). Empty for
1045− // image/code-only messages, which then opt out of the swipe gesture.
1046− val quoteText = remember(message.parts) {
1048− .filterIsInstance<TextPart>()
1049− .joinToString("\n\n") { it.text }
1051− .takeIf { it.isNotEmpty() }
1053− // Swipe-start-to-end reveals a reply affordance and triggers quote-reply,
1054− // snapping back (the message isn't dismissed — the quote fills the composer).
1055− // Only enabled when there's text to quote, so non-text messages don't
1056− // capture horizontal drags (e.g. inside a horizontally-scrollable code block).
1057− val swipeState = rememberSwipeToDismissBoxState(
1058− confirmValueChange = { value ->
1059− if (value == SwipeToDismissBoxValue.StartToEnd && quoteText != null) {
1060− haptics.performHapticFeedback(androidx.compose.ui.hapticfeedback.HapticFeedbackType.TextHandleMove)
1061− vm.quoteReply(quoteText)
1062− runCatching { inputFocusRequester.requestFocus() }
1068− state = swipeState,
1069− enableDismissFromEndToStart = false,
1070− enableDismissFromStartToEnd = quoteText != null,
1071− backgroundContent = {
1073− Modifier.fillMaxSize().padding(horizontal = 16.dp),
1074− contentAlignment = Alignment.CenterStart,
1077− Icons.AutoMirrored.Filled.Reply,
1078− contentDescription = null,
1079− tint = MaterialTheme.colorScheme.onSurfaceVariant,
1086− isRunning = running && message.info.id == lastMessageId,
1087− imageContext = imageContext,
1088− modelLabel = modelLabel,
1089− onOpenFile = onOpenFile,
1090− onRevert = { vm.revertTo(message.info.id) },
1092− // editMessage reverts to before this message (hiding it and
1093− // everything after); the revert banner surfaces the rewind
1094− // with an Undo. Focus + scroll the composer into view like the
1095− // Quote action so the prefilled draft isn't off-screen.
1096− haptics.performHapticFeedback(androidx.compose.ui.hapticfeedback.HapticFeedbackType.TextHandleMove)
1097− vm.editMessage(message.info.id, text)
1098− runCatching { inputFocusRequester.requestFocus() }
1099− contentScope.launch {
1100− runCatchingCancellable {
1101− listState.animateScrollToItem(listItems.lastIndex.coerceAtLeast(0))
1105− onSpeak = { text -> tts.toggle(message.info.id, text) },
1106− isSpeaking = message.info.id == speakingMessageId,
1107− onQuote = { text ->
1108− vm.quoteReply(text)
1109− runCatching { inputFocusRequester.requestFocus() }
1111− onBranch = { text -> vm.branchFrom(text) },
1112− sendStatus = optimisticStatuses[message.info.id]?.let { failed ->
1113− if (failed) soy.iko.opencode.ui.chat.MessageSendStatus.FAILED
1114− else soy.iko.opencode.ui.chat.MessageSendStatus.SENDING
1116− isEdited = message.info.time?.let { it.updated != null && it.updated != it.created } == true,
1117− onRetry = optimisticStatuses[message.info.id]?.let { failed ->
1119− { vm.retryOptimisticMessage(message.info.id) }
1124− onDismiss = optimisticStatuses[message.info.id]?.let { failed ->
1126− { vm.dismissOptimistic(message.info.id) }
1138− item(key = "__typing") {
1139− val workingText = stringResource(R.string.working)
1141− verticalAlignment = Alignment.CenterVertically,
1142− modifier = Modifier.semantics {
1143− contentDescription = workingText
1146− CircularProgressIndicator(Modifier.size(16.dp), strokeWidth = 2.dp)
1147− Text(workingText, style = MaterialTheme.typography.labelMedium, modifier = Modifier.padding(start = 6.dp))
1154− // Jump-to-latest affordance when the user has scrolled away during a stream.
1155− AnimatedVisibility(
1156− visible = !isPinnedToBottom && listItems.isNotEmpty(),
1157− modifier = Modifier.align(Alignment.BottomEnd),
1159− // Badge the FAB when new content arrived while the user was scrolled up, so
1160− // they know there's something new to jump to (cleared once back at bottom).
1163− if (hasNewContent) {
1164− val newContentLabel = stringResource(R.string.new_messages)
1165− Badge(modifier = Modifier.semantics { contentDescription = newContentLabel })
1168− modifier = Modifier.padding(end = 16.dp, bottom = 16.dp),
1170− ExtendedFloatingActionButton(
1172− hasNewContent = false
1173− if (listItems.isNotEmpty()) {
1174− // Scroll to the effective last index, including the
1175− // trailing "__typing" row when a run is active.
1176− val target = if (running) listItems.size else listItems.lastIndex
1177− contentScope.launch { runCatchingCancellable { listState.animateScrollToItem(target) } }
1180− // contentDescription null: the visible "Latest" text already labels
1181− // the FAB, so a description here makes TalkBack announce "Latest" twice.
1182− icon = { Icon(Icons.Filled.KeyboardArrowDown, contentDescription = null) },
1183− text = { Text(stringResource(R.string.latest)) },
1187− // Scroll-to-top affordance: a small FAB at the start edge, visible when the
1188− // user has scrolled down past the first few messages. Symmetric to the
1189− // jump-to-latest FAB, for long conversations where manual fling back is tedious.
1190− val scrolledDown by remember {
1191− derivedStateOf { listState.firstVisibleItemIndex > 0 || listState.firstVisibleItemScrollOffset > 200 }
1193− AnimatedVisibility(
1194− visible = scrolledDown && listItems.size > 4,
1195− modifier = Modifier.align(Alignment.BottomStart),
1197− SmallFloatingActionButton(
1199− contentScope.launch { runCatchingCancellable { listState.animateScrollToItem(0) } }
1201− modifier = Modifier.padding(start = 16.dp, bottom = 16.dp),
1204− Icons.Filled.KeyboardArrowUp,
1205− contentDescription = stringResource(R.string.scroll_to_top),
1214− if (showExitConfirm) {
1216− onDismissRequest = { showExitConfirm = false },
1217− title = { Text(stringResource(R.string.stop_and_exit_title)) },
1218− text = { Text(stringResource(R.string.stop_and_exit_text)) },
1220− TextButton(onClick = {
1221− showExitConfirm = false
1222− haptics.performHapticFeedback(androidx.compose.ui.hapticfeedback.HapticFeedbackType.TextHandleMove)
1225− }) { Text(stringResource(R.string.stop_and_exit)) }
1228− TextButton(onClick = { showExitConfirm = false }) { Text(stringResource(R.string.stay)) }
1233− if (showStopConfirm) {
1235− onDismissRequest = { showStopConfirm = false },
1236− title = { Text(stringResource(R.string.stop_run_title)) },
1237− text = { Text(stringResource(R.string.stop_run_text)) },
1239− TextButton(onClick = {
1240− showStopConfirm = false
1241− haptics.performHapticFeedback(androidx.compose.ui.hapticfeedback.HapticFeedbackType.TextHandleMove)
1243− }) { Text(stringResource(R.string.stop), color = MaterialTheme.colorScheme.error) }
1246− TextButton(onClick = { showStopConfirm = false }) { Text(stringResource(R.string.cancel)) }
1251− if (showSummarizeConfirm) {
1253− onDismissRequest = { showSummarizeConfirm = false },
1254− title = { Text(stringResource(R.string.summarize_confirm_title)) },
1255− text = { Text(stringResource(R.string.summarize_confirm_text)) },
1257− TextButton(onClick = {
1258− showSummarizeConfirm = false
1260− }) { Text(stringResource(R.string.action_continue)) }
1263− TextButton(onClick = { showSummarizeConfirm = false }) { Text(stringResource(R.string.cancel)) }
1268− if (showInitConfirm) {
1270− onDismissRequest = { showInitConfirm = false },
1271− title = { Text(stringResource(R.string.init_confirm_title)) },
1272− text = { Text(stringResource(R.string.init_confirm_text)) },
1274− TextButton(onClick = {
1275− showInitConfirm = false
1277− }) { Text(stringResource(R.string.action_continue)) }
1280− TextButton(onClick = { showInitConfirm = false }) { Text(stringResource(R.string.cancel)) }
1285− if (showRenameDialog) {
1286− RenameSessionChatDialog(
1287− initialTitle = sessionTitle ?: "",
1288− onDismiss = { showRenameDialog = false },
1289− onConfirm = { newName ->
1290− showRenameDialog = false
1291− vm.renameSession(newName)
1296− if (showDeleteDialog) {
1298− onDismissRequest = { showDeleteDialog = false },
1299− title = { Text(stringResource(R.string.delete_session_chat_title)) },
1300− text = { Text(stringResource(R.string.delete_session_chat_text, sessionTitle ?: sessionLabel)) },
1302− TextButton(onClick = {
1303− showDeleteDialog = false
1304− haptics.performHapticFeedback(androidx.compose.ui.hapticfeedback.HapticFeedbackType.LongPress)
1306− }) { Text(stringResource(R.string.delete), color = MaterialTheme.colorScheme.error) }
1309− TextButton(onClick = { showDeleteDialog = false }) { Text(stringResource(R.string.cancel)) }
1314− if (showShellDialog) {
1315− ShellCommandDialog(
1316− onDismiss = { showShellDialog = false },
1318− showShellDialog = false
1324− if (showModelPicker) {
1327− selected = selectedModel,
1328− loading = modelsLoading,
1329− error = modelsError,
1330− onSelect = { vm.selectModel(it) },
1331− onRetry = { vm.reloadModels() },
1332− onDismiss = { showModelPicker = false },
1336− if (showAgentPicker) {
1339− selected = selectedAgent,
1340− loading = agentsLoading,
1341− error = agentsError,
1342− onSelect = { vm.selectAgent(it?.name) },
1343− onRetry = { vm.reloadAgents() },
1344− onDismiss = { showAgentPicker = false },
1348− if (showCommandPicker) {
1349− CommandPickerSheet(
1350− commands = commands,
1351− loading = commandsLoading,
1352− error = commandsError,
1353− onSelect = { vm.runCommand(it) },
1354− onRetry = { vm.reloadCommands() },
1355− onDismiss = { showCommandPicker = false },
1359− pendingPermission?.let { permission ->
1361− permission = permission,
1362− position = permissionProgress.position,
1363− total = permissionProgress.total,
1364− onRespond = { response -> vm.respondPermission(permission, response) },
1369− CommandPalette(actions = paletteActions, onDismiss = { showPalette = false })
1374−private fun ChatInputBar(
1376− onValueChange: (String) -> Unit,
1380− sendOnEnter: Boolean,
1381− onSend: () -> Unit,
1382− onAbort: () -> Unit,
1383− queuedFollowUp: String?,
1384− onQueueFollowUp: (String) -> Unit,
1385− onCancelQueue: () -> Unit,
1386− focusRequester: androidx.compose.ui.focus.FocusRequester,
1387− attachments: List<PendingAttachment>,
1389− onRemoveAttachment: (String) -> Unit,
1390− onPickPhoto: () -> Unit,
1391− onPickFile: () -> Unit,
1392− onCamera: () -> Unit,
1393− onVoice: () -> Unit,
1395− // Sendable when there's text OR at least one attachment (an image-only prompt is valid).
1396− val hasContent = value.isNotBlank() || attachments.isNotEmpty()
1397− // Full-screen editor state: opened when the user wants more space for a long prompt.
1398− var showFullScreenEditor by rememberSaveable { mutableStateOf(false) }
1399− Surface(tonalElevation = 3.dp, modifier = Modifier.imePadding()) {
1400− Column(modifier = Modifier.fillMaxWidth().windowInsetsPadding(WindowInsets.navigationBars)) {
1401− // A queued follow-up replaces the Stop button with a "queued" chip so the
1402− // user sees their message will be sent when the run finishes, and can cancel.
1403− if (queuedFollowUp != null) {
1405− modifier = Modifier
1407− .padding(start = 12.dp, top = 6.dp, end = 4.dp),
1408− verticalAlignment = Alignment.CenterVertically,
1410− Column(modifier = Modifier.weight(1f)) {
1412− stringResource(R.string.queued),
1413− style = MaterialTheme.typography.labelSmall,
1414− color = MaterialTheme.colorScheme.onSurfaceVariant,
1418− style = MaterialTheme.typography.bodySmall,
1419− color = MaterialTheme.colorScheme.onSurfaceVariant,
1421− overflow = TextOverflow.Ellipsis,
1424− TextButton(onClick = onCancelQueue, contentPadding = androidx.compose.foundation.layout.PaddingValues(horizontal = 8.dp)) {
1425− Text(stringResource(R.string.cancel))
1429− // Staged attachments: horizontally-scrollable thumbnails/chips, each removable.
1430− AttachmentStrip(attachments, onRemove = onRemoveAttachment, staging = staging)
1432− modifier = Modifier.fillMaxWidth().padding(8.dp),
1433− verticalAlignment = Alignment.Bottom,
1435− // Attach menu: photo picker, camera, or any file.
1436− var showAttachMenu by remember { mutableStateOf(false) }
1438− IconButton(onClick = { showAttachMenu = true }, enabled = enabled) {
1439− Icon(Icons.Filled.Add, contentDescription = stringResource(R.string.add_attachment))
1441− DropdownMenu(expanded = showAttachMenu, onDismissRequest = { showAttachMenu = false }) {
1443− leadingIcon = { Icon(Icons.Filled.PhotoLibrary, contentDescription = null) },
1444− text = { Text(stringResource(R.string.attach_photo)) },
1445− onClick = { showAttachMenu = false; onPickPhoto() },
1448− leadingIcon = { Icon(Icons.Filled.PhotoCamera, contentDescription = null) },
1449− text = { Text(stringResource(R.string.attach_camera)) },
1450− onClick = { showAttachMenu = false; onCamera() },
1453− leadingIcon = { Icon(Icons.Filled.Description, contentDescription = null) },
1454− text = { Text(stringResource(R.string.attach_file)) },
1455− onClick = { showAttachMenu = false; onPickFile() },
1459− // Voice dictation: appends recognized speech to the draft.
1460− IconButton(onClick = onVoice, enabled = enabled) {
1461− Icon(Icons.Filled.Mic, contentDescription = stringResource(R.string.voice_input))
1463− // Expand to a full-screen editor for long prompts (the inline field caps at 6 lines).
1464− IconButton(onClick = { showFullScreenEditor = true }, enabled = enabled) {
1465− Icon(Icons.Filled.Expand, contentDescription = stringResource(R.string.expand_editor))
1469− onValueChange = { v ->
1470− // Cap input length so a huge paste can't stall the UI. Shares are
1471− // capped separately in MainActivity; this guards typed/pasted drafts.
1472− onValueChange(v.take(NetworkConfig.maxDraftLengthChars))
1474− modifier = Modifier
1476− .focusRequester(focusRequester)
1477− .testTag("chat_input")
1478− .onPreviewKeyEvent { event ->
1479− if (event.type != KeyEventType.KeyDown || event.key != Key.Enter) return@onPreviewKeyEvent false
1480− // With "Send on Enter" on, Enter sends (Shift+Enter newlines).
1481− // With it off, Enter inserts a newline and Ctrl+Enter sends.
1482− val send = enterShouldSend(
1484− hasContent = hasContent,
1485− sendOnEnter = sendOnEnter,
1486− shift = event.isShiftPressed,
1487− ctrl = event.isCtrlPressed,
1490− if (running) onQueueFollowUp(value) else onSend()
1496− // While a run is active a typed message only queues (sends after the run), so
1497− // the placeholder says so instead of the plain "Message…".
1499− Text(stringResource(if (running) R.string.composer_hint_running else R.string.message_placeholder))
1503− // Show a "N / max" countdown once the draft crosses a high fraction of
1504− // the cap, so the user knows a paste is about to be truncated instead
1505− // of being silently cut off. Hidden for normal short prompts to avoid
1506− // clutter under a typical one-line message.
1508− val threshold = (NetworkConfig.maxDraftLengthChars * NetworkConfig.draftCountdownThresholdFraction).toInt()
1509− if (value.length >= threshold) {
1512− R.string.draft_chars_remaining,
1513− NetworkConfig.maxDraftLengthChars - value.length,
1514− NetworkConfig.maxDraftLengthChars,
1516− style = MaterialTheme.typography.labelSmall,
1517− color = if (value.length >= NetworkConfig.maxDraftLengthChars) MaterialTheme.colorScheme.error
1518− else MaterialTheme.colorScheme.onSurfaceVariant,
1522− keyboardOptions = KeyboardOptions(
1523− // When "Send on Enter" is on, expose ImeAction.Send so the soft
1524− // keyboard shows a send key — matching the setting's intent and
1525− // giving touch-only users a keyboard send affordance. When off,
1526− // ImeAction.Default keeps the enter/newline key for multi-line input.
1527− imeAction = if (sendOnEnter) ImeAction.Send else ImeAction.Default,
1528− capitalization = KeyboardCapitalization.Sentences,
1530− keyboardActions = KeyboardActions(
1532− if (enabled && hasContent) onSend()
1536− ComposerTrailingButton(
1538− aborting = aborting,
1539− canSend = enabled && hasContent,
1540− canQueue = enabled && value.isNotBlank(),
1543− onQueue = { onQueueFollowUp(value) },
1547− if (showFullScreenEditor) {
1550− onValueChange = onValueChange,
1551− onDismiss = { showFullScreenEditor = false },
1552− onSend = { showFullScreenEditor = false; onSend() },
1553− canSend = enabled && hasContent,
1559−/** Full-screen editor dialog for composing long prompts. Gives the full viewport height to
1560− * the text field (vs the inline 6-line cap) with a Send button and a collapse action. */
1561−@OptIn(ExperimentalMaterial3Api::class)
1563−private fun FullScreenEditor(
1565− onValueChange: (String) -> Unit,
1566− onDismiss: () -> Unit,
1567− onSend: () -> Unit,
1570− androidx.compose.ui.window.Dialog(
1571− onDismissRequest = onDismiss,
1572− properties = androidx.compose.ui.window.DialogProperties(usePlatformDefaultWidth = false, decorFitsSystemWindows = false),
1576− androidx.compose.material3.TopAppBar(
1577− title = { Text(stringResource(R.string.message_placeholder)) },
1579− androidx.compose.material3.TextButton(onClick = onDismiss) {
1580− Text(stringResource(R.string.collapse_editor))
1586− Surface(tonalElevation = 3.dp) {
1588− modifier = Modifier.fillMaxWidth().imePadding().padding(12.dp),
1589− horizontalArrangement = Arrangement.End,
1591− androidx.compose.material3.Button(onClick = onSend, enabled = canSend) {
1592− Text(stringResource(R.string.send))
1600− onValueChange = { v -> onValueChange(v.take(NetworkConfig.maxDraftLengthChars)) },
1601− modifier = Modifier.fillMaxSize().padding(padding),
1602− placeholder = { Text(stringResource(R.string.message_placeholder)) },
1603− maxLines = Int.MAX_VALUE,
1604− keyboardOptions = KeyboardOptions(imeAction = ImeAction.Default, capitalization = KeyboardCapitalization.Sentences),
1610−/** Whether a hardware Enter keypress should send: never when disabled/empty; otherwise
1611− * Enter sends (unless Shift) when send-on-Enter is on, else only Ctrl+Enter sends. */
1612−private fun enterShouldSend(
1614− hasContent: Boolean,
1615− sendOnEnter: Boolean,
1619− !enabled || !hasContent -> false
1620− sendOnEnter -> !shift
1624−/** The composer's trailing button: while a run is active a Stop (with in-flight spinner),
1625− * preceded by a Queue button when the user has typed a follow-up; otherwise Send. Extracted so
1626− * [ChatInputBar] stays under the complexity threshold. */
1628−private fun ComposerTrailingButton(
1633− onSend: () -> Unit,
1634− onAbort: () -> Unit,
1635− onQueue: () -> Unit,
1638− Row(verticalAlignment = Alignment.CenterVertically) {
1639− // While a run is active the trailing action is Stop, so the only send affordance is
1640− // the keyboard's IME action — which is a plain newline when "Send on Enter" is off.
1641− // That leaves a touch-only user with the setting off no way to queue a follow-up
1642− // (Ctrl+Enter needs a hardware keyboard). Surface an explicit Queue button whenever
1643− // there's typed TEXT so queuing is always reachable, without changing the user's
1644− // Enter-inserts-a-newline preference. Gate on typed text — not the send-oriented
1645− // canSend, which is also true for an attachment-only composer — because queuing "" just
1646− // calls setQueuedFollowUp(null), silently cancelling any already-queued follow-up and
1647− // dropping the staged attachment (queued follow-ups don't carry attachments anyway).
1651− modifier = Modifier.testTag("queue_button"),
1653− // PlaylistAdd reads as "add to a queue/list" more clearly than a clock
1654− // icon (which can be read as "snooze" or "later"), and isn't confused with
1655− // the Send action sitting right beside the Stop button.
1657− Icons.AutoMirrored.Filled.PlaylistAdd,
1658− contentDescription = stringResource(R.string.queue_followup),
1662− // Show a spinner while the abort REST call is in flight so the user sees the stop
1663− // was sent, and disable to prevent a double-tap.
1666− enabled = !aborting,
1667− modifier = Modifier.padding(start = 4.dp).testTag("stop_button"),
1670− val stopLabel = stringResource(R.string.stop)
1671− CircularProgressIndicator(
1672− Modifier.size(18.dp).semantics { contentDescription = stopLabel },
1673− strokeWidth = 2.dp,
1676− Icon(Icons.Filled.Stop, contentDescription = stringResource(R.string.stop))
1684− modifier = Modifier.padding(start = 4.dp).testTag("send_button"),
1686− Icon(Icons.AutoMirrored.Filled.Send, contentDescription = stringResource(R.string.send))
1691−@OptIn(androidx.compose.foundation.layout.ExperimentalLayoutApi::class)
1693−private fun EmptyConversation(
1694− onSuggestion: (String) -> Unit,
1695− modifier: Modifier = Modifier,
1697− // A few example prompts so a first-time user has a one-tap path to their first
1698− // message instead of staring at a blank input. Tapping a chip fills the draft
1699− // (without sending) so the user can edit it before sending.
1700− val suggestions = remember {
1702− R.string.empty_chat_suggest_1,
1703− R.string.empty_chat_suggest_2,
1704− R.string.empty_chat_suggest_3,
1708− modifier = modifier.padding(32.dp),
1709− horizontalAlignment = Alignment.CenterHorizontally,
1712− Icons.Filled.AutoAwesome,
1713− contentDescription = null,
1714− modifier = Modifier.size(48.dp),
1715− tint = MaterialTheme.colorScheme.onSurfaceVariant,
1717− Spacer(Modifier.size(16.dp))
1719− stringResource(R.string.empty_chat_title),
1720− style = MaterialTheme.typography.titleMedium,
1722− Spacer(Modifier.size(8.dp))
1724− stringResource(R.string.empty_chat_hint),
1725− style = MaterialTheme.typography.bodyMedium,
1726− color = MaterialTheme.colorScheme.onSurfaceVariant,
1728− Spacer(Modifier.size(20.dp))
1729− // Suggestion chips wrap across rows on narrow screens instead of stacking full-width,
1730− // so a longer localized prompt doesn't push the chips off-screen on a phone.
1732− modifier = Modifier.fillMaxWidth(),
1733− horizontalArrangement = Arrangement.spacedBy(8.dp),
1734− verticalArrangement = Arrangement.spacedBy(8.dp),
1736− suggestions.forEach { resId ->
1737− val text = stringResource(resId)
1738− androidx.compose.material3.AssistChip(
1739− onClick = { onSuggestion(text) },
1740− label = { Text(text, style = MaterialTheme.typography.bodyMedium) },
1747−/** A banner shown while a revert checkpoint is active, offering an Undo (unrevert). */
1749−private fun RevertBanner(onUndo: () -> Unit) {
1751− color = MaterialTheme.colorScheme.tertiaryContainer,
1752− tonalElevation = 2.dp,
1753− modifier = Modifier.fillMaxWidth(),
1756− modifier = Modifier.fillMaxWidth().padding(start = 12.dp, end = 4.dp, top = 4.dp, bottom = 4.dp),
1757− verticalAlignment = Alignment.CenterVertically,
1758− horizontalArrangement = Arrangement.SpaceBetween,
1760− Row(verticalAlignment = Alignment.CenterVertically, modifier = Modifier.weight(1f)) {
1762− Icons.Filled.Restore,
1763− contentDescription = null,
1764− tint = MaterialTheme.colorScheme.onTertiaryContainer,
1765− modifier = Modifier.size(18.dp),
1768− stringResource(R.string.reverted_banner),
1769− style = MaterialTheme.typography.bodySmall,
1770− color = MaterialTheme.colorScheme.onTertiaryContainer,
1771− modifier = Modifier.padding(start = 8.dp),
1774− TextButton(onClick = onUndo) { Text(stringResource(R.string.undo)) }
1779−/** A banner shown while messages composed offline are queued in the outbox, with a
1780− * "Send now" nudge and a discard. Shows a spinner while the queue is flushing. */
1782−private fun OutboxBanner(
1785− onFlush: () -> Unit,
1786− onDiscard: () -> Unit,
1789− color = MaterialTheme.colorScheme.secondaryContainer,
1790− tonalElevation = 2.dp,
1791− modifier = Modifier.fillMaxWidth(),
1794− modifier = Modifier.fillMaxWidth().padding(start = 12.dp, end = 4.dp, top = 4.dp, bottom = 4.dp),
1795− verticalAlignment = Alignment.CenterVertically,
1796− horizontalArrangement = Arrangement.SpaceBetween,
1798− Row(verticalAlignment = Alignment.CenterVertically, modifier = Modifier.weight(1f)) {
1800− CircularProgressIndicator(
1801− Modifier.size(16.dp),
1802− strokeWidth = 2.dp,
1803− color = MaterialTheme.colorScheme.onSecondaryContainer,
1805− Spacer(Modifier.size(8.dp))
1809− stringResource(R.string.outbox_sending)
1811− val res = if (count == 1) R.string.outbox_pending_one else R.string.outbox_pending_many
1812− stringResource(res, count)
1814− style = MaterialTheme.typography.bodySmall,
1815− color = MaterialTheme.colorScheme.onSecondaryContainer,
1819− TextButton(onClick = onFlush) { Text(stringResource(R.string.outbox_flush)) }
1820− TextButton(onClick = onDiscard) {
1821− Text(stringResource(R.string.outbox_discard_all), color = MaterialTheme.colorScheme.error)
1828−/** Prompt for a one-off shell command to run in the session's worktree. */
1830−private fun ShellCommandDialog(onDismiss: () -> Unit, onRun: (String) -> Unit) {
1831− var command by rememberSaveable { mutableStateOf("") }
1833− onDismissRequest = onDismiss,
1834− title = { Text(stringResource(R.string.run_shell_command)) },
1838− onValueChange = { command = it },
1839− modifier = Modifier.fillMaxWidth(),
1840− placeholder = { Text(stringResource(R.string.shell_command_hint)) },
1841− label = { Text(stringResource(R.string.shell_command_label)) },
1843− keyboardOptions = KeyboardOptions(imeAction = ImeAction.Done),
1844− keyboardActions = KeyboardActions(onDone = { if (command.isNotBlank()) onRun(command.trim()) }),
1849− onClick = { if (command.isNotBlank()) onRun(command.trim()) },
1850− enabled = command.isNotBlank(),
1851− ) { Text(stringResource(R.string.run)) }
1853− dismissButton = { TextButton(onClick = onDismiss) { Text(stringResource(R.string.cancel)) } },
1858− * Change signal for the auto-scroll-on-stream watcher. Primitive fields avoid the
1859− * boxing `Triple<Int, Int, Boolean>` would impose on every snapshot evaluation, and
1860− * equality is structural so `snapshotFlow` emits only when something relevant changes.
1862−private data class AutoScrollSignal(val size: Int, val lastTextLength: Int, val pinned: Boolean)
1864−/** Length of the streaming content carried by [part], driving auto-scroll as it grows.
1865− * Covers text, reasoning, and tool output so a pinned view keeps following non-text
1866− * streaming, not just plain assistant text. O(1). */
1867−private fun streamingContentLength(part: Part?): Int = when (part) {
1868− is TextPart -> part.text.length
1869− is ReasoningPart -> part.text.length
1870− is ToolPart -> when (val st = part.state) {
1871− is ToolCompleted -> st.output?.length ?: 0
1872− is ToolError -> st.error?.length ?: 0
1873− is ToolRunning -> st.title?.length ?: 0
1879−/** Rename dialog for the currently-open session. Mirrors the SessionListScreen rename
1880− * dialog but lives in the chat screen so the user can rename without backing out to
1881− * the list. Pre-filled with the current title; the cap matches the list dialog. */
1883−private fun RenameSessionChatDialog(
1884− initialTitle: String,
1885− onDismiss: () -> Unit,
1886− onConfirm: (String) -> Unit,
1888− // Seed the field once (no key input) so a later external title change — e.g. opencode
1889− // auto-generating a session title after the first prompt, arriving via SessionUpdated —
1890− // doesn't re-initialize the box and discard the user's in-progress edit.
1891− var title by rememberSaveable { mutableStateOf(initialTitle) }
1893− onDismissRequest = onDismiss,
1894− title = { Text(stringResource(R.string.rename_session_chat)) },
1898− onValueChange = { v -> title = v.take(NetworkConfig.maxSessionTitleChars) },
1899− modifier = Modifier.fillMaxWidth(),
1900− placeholder = { Text(stringResource(R.string.session_title_hint)) },
1901− label = { Text(stringResource(R.string.rename_session_chat)) },
1903− keyboardOptions = KeyboardOptions(imeAction = ImeAction.Done),
1904− keyboardActions = KeyboardActions(onDone = { if (title.isNotBlank()) onConfirm(title.trim()) }),
1908− TextButton(onClick = { if (title.isNotBlank()) onConfirm(title.trim()) }, enabled = title.isNotBlank()) {
1909− Text(stringResource(R.string.save))
1913− TextButton(onClick = onDismiss) { Text(stringResource(R.string.cancel)) }
1919− * A single item in the chat message list — either a [Message] bubble or a day
1920− * [Separator] inserted before the first message of a new day. The separator shifts
1921− * the LazyColumn indices vs. the raw messages list, so scroll-target math must use
1922− * the [List] of these items (not `messages.size`/`lastIndex`).
1924−private sealed interface MessageListItem {
1926− val contentType: Any
1928− data class Message(val message: MessageWithParts, override val key: Any) : MessageListItem {
1929− override val contentType: Any get() = message.info::class
1932− data class Separator(val label: String, val ordinal: Int) : MessageListItem {
1933− // Key on the day-occurrence ordinal, not the label: two non-contiguous groups
1934− // can share a label (e.g. an untimestamped message — empty label — between two
1935− // same-day messages, or two untimestamped groups), and a label-only key would
1936− // then collide, which makes LazyColumn throw on duplicate keys. The ordinal is
1937− // stable for a given message ordering so slots aren't needlessly recreated.
1938− override val key: Any get() = "sep_${ordinal}_$label"
1939− // Separators share a contentType so the LazyColumn can recycle their slots.
1940− override val contentType: Any get() = "separator"
1945− * Build the interleaved list of [MessageListItem]s for the message list, inserting a
1946− * [MessageListItem.Separator] before the first message of each new calendar day. Uses
1947− * the message's `time.created` (falling back to `updated` then `completed`) to bucket.
1948− * Messages with no timestamp are grouped under an empty-label separator only if they
1949− * start the list, so a server that omits timestamps doesn't suppress the first divider.
1951− * [todayLabel]/[yesterdayLabel] are resolved by the caller (a @Composable can't call
1952− * stringResource from inside this plain function) and used for the "Today"/"Yesterday"
1953− * labels; older days fall back to a locale-stable medium-date format.
1955−private fun buildMessageListItems(
1956− messages: List<MessageWithParts>,
1957− todayLabel: String,
1958− yesterdayLabel: String,
1959−): List<MessageListItem> {
1960− if (messages.isEmpty()) return emptyList()
1961− val today = java.time.LocalDate.now(java.time.ZoneId.systemDefault())
1962− val dateFmt = mediumDateFormat()
1963− val result = ArrayList<MessageListItem>(messages.size + 4)
1964− val seenKeys = HashSet<String>(messages.size * 2)
1965− var lastDayKey: String? = null
1967− var emptyIdOrdinal = 0
1969− for (message in messages) {
1970− val ts = message.info.time?.created ?: message.info.time?.updated ?: message.info.time?.completed
1971− val dayKey = ts?.let { dayKey(it) } ?: ""
1972− // Emit a separator before the very first message (so a leading un-timestamped message
1973− // still gets the first divider, empty label and all), and thereafter only when crossing
1974− // into a new NON-empty calendar day. An un-timestamped message mid-list (empty key)
1975− // neither emits its own separator nor resets the day — otherwise a following same-day
1976− // message would see a "" -> "<today>" transition and emit a duplicate "Today" header.
1977− if (first || (dayKey.isNotEmpty() && dayKey != lastDayKey)) {
1978− result.add(MessageListItem.Separator(dayLabel(dayKey, ts ?: 0L, today, todayLabel, yesterdayLabel, dateFmt), sepOrdinal++))
1980− if (dayKey.isNotEmpty()) lastDayKey = dayKey
1982− // Most messages have a unique non-empty id. An unrecognized-role message can carry an
1983− // empty id — and the reducer intentionally keeps several such messages as distinct
1984− // holders — so give each a stable synthetic key and defensively de-collide any remaining
1985− // duplicate; otherwise LazyColumn throws on a duplicate key and the whole screen crashes.
1986− var key = message.info.id.ifEmpty { "msg-empty-${emptyIdOrdinal++}" }
1987− if (!seenKeys.add(key)) {
1989− while (!seenKeys.add("$key#$suffix")) suffix++
1990− key = "$key#$suffix"
1992− result.add(MessageListItem.Message(message, key))
1998− * A stable bucket key for a timestamp's calendar day (epoch-days as a string).
2000− * [buildMessageListItems] re-runs on every streaming snapshot (the memo is keyed on the
2001− * whole `messages` list, which must stay so the live message's fresh parts render), so a
2002− * naive implementation would re-allocate an `Instant`/`ZonedDateTime`/`LocalDate` for
2003− * every message on every token. Message timestamps are immutable once assigned, so we
2004− * memoize the parse per epoch-millis: after the first snapshot, each unchanged message is
2005− * a cheap hash lookup. Bounded LRU (access-order) caps memory; only touched on the main
2006− * thread during composition, so the coarse lock is uncontended.
2008−private val dayKeyCache = object : LinkedHashMap<Long, String>(128, 0.75f, true) {
2009− override fun removeEldestEntry(eldest: MutableMap.MutableEntry<Long, String>): Boolean = size > 1024
2012−private fun dayKey(epochMillis: Long): String = synchronized(dayKeyCache) {
2013− dayKeyCache.getOrPut(epochMillis) {
2014− java.time.Instant.ofEpochMilli(epochMillis)
2015− .atZone(java.time.ZoneId.systemDefault()).toLocalDate().toEpochDay().toString()
2019−// The medium-date formatter is an ICU locale lookup; cache one instance instead of
2020−// allocating a fresh one per buildMessageListItems call, rebuilding only if the default
2021−// locale changes at runtime. Main-thread-only, so no synchronization is needed.
2022−private var cachedDateFmt: java.text.DateFormat? = null
2023−private var cachedDateFmtLocale: java.util.Locale? = null
2025−private fun mediumDateFormat(): java.text.DateFormat {
2026− val locale = java.util.Locale.getDefault()
2027− val existing = cachedDateFmt
2028− if (existing != null && cachedDateFmtLocale == locale) return existing
2029− return java.text.DateFormat.getDateInstance(java.text.DateFormat.MEDIUM).also {
2031− cachedDateFmtLocale = locale
2036− * Resolve a day-key back to a human-readable label. "Today" / "Yesterday" for the
2037− * recent days, otherwise a locale-stable medium-date format. Returns an empty string
2038− * when [dayKey] is empty (no timestamp) so no separator is rendered for un-timestamped
2041−private fun dayLabel(
2044− today: java.time.LocalDate,
2045− todayLabel: String,
2046− yesterdayLabel: String,
2047− dateFmt: java.text.DateFormat,
2049− if (dayKey.isEmpty()) return ""
2050− val epochDay = dayKey.toLongOrNull() ?: return ""
2051− val date = java.time.LocalDate.ofEpochDay(epochDay)
2053− date == today -> todayLabel
2054− date == today.minusDays(1) -> yesterdayLabel
2055− else -> dateFmt.format(java.util.Date(ts))
2060− * A centered day divider in the message list. Renders nothing for an empty label
2061− * (the no-timestamp case) so un-timestamped messages don't get a stray blank divider.
2064−private fun DateSeparator(label: String) {
2065− if (label.isBlank()) return
2067− modifier = Modifier.fillMaxWidth(),
2068− horizontalArrangement = Arrangement.Center,
2071− color = MaterialTheme.colorScheme.surfaceVariant,
2072− shape = MaterialTheme.shapes.small,
2076− style = MaterialTheme.typography.labelSmall,
2077− color = MaterialTheme.colorScheme.onSurfaceVariant,
2078− modifier = Modifier.padding(horizontal = 12.dp, vertical = 4.dp),