@@ -0,0 +1,3033 @@
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.animation.core.RepeatMode
15+import androidx.compose.animation.core.animateFloat
16+import androidx.compose.animation.core.infiniteRepeatable
17+import androidx.compose.animation.core.rememberInfiniteTransition
18+import androidx.compose.animation.core.tween
19+import androidx.compose.foundation.background
20+import androidx.compose.foundation.clickable
21+import androidx.compose.foundation.content.contentReceiver
22+import androidx.compose.foundation.layout.Arrangement
23+import androidx.compose.foundation.layout.Box
24+import androidx.compose.foundation.layout.Column
25+import androidx.compose.foundation.layout.FlowRow
26+import androidx.compose.foundation.layout.PaddingValues
27+import androidx.compose.foundation.layout.Row
28+import androidx.compose.foundation.layout.Spacer
29+import androidx.compose.foundation.layout.WindowInsets
30+import androidx.compose.foundation.layout.fillMaxSize
31+import androidx.compose.foundation.layout.fillMaxWidth
32+import androidx.compose.foundation.layout.heightIn
33+import androidx.compose.foundation.layout.height
34+import androidx.compose.foundation.layout.imePadding
35+import androidx.compose.foundation.layout.ime
36+import androidx.compose.foundation.layout.navigationBars
37+import androidx.compose.foundation.layout.padding
38+import androidx.compose.foundation.layout.size
39+import androidx.compose.foundation.layout.union
40+import androidx.compose.foundation.layout.widthIn
41+import androidx.compose.foundation.layout.windowInsetsPadding
42+import androidx.compose.foundation.layout.wrapContentWidth
43+import androidx.compose.foundation.lazy.LazyColumn
44+import androidx.compose.foundation.lazy.items
45+import androidx.compose.foundation.lazy.rememberLazyListState
46+import androidx.compose.foundation.shape.RoundedCornerShape
47+import androidx.compose.material.icons.Icons
48+import androidx.compose.material.icons.automirrored.filled.ArrowBack
49+import androidx.compose.material.icons.automirrored.filled.Send
50+import androidx.compose.material.icons.filled.ErrorOutline
51+import androidx.compose.material.icons.filled.Add
52+import androidx.compose.material.icons.filled.AutoAwesome
53+import androidx.compose.material.icons.filled.Delete
54+import androidx.compose.material.icons.filled.Description
55+import androidx.compose.material.icons.filled.Close
56+import androidx.compose.material.icons.filled.Edit
57+import androidx.compose.material.icons.filled.Expand
58+import androidx.compose.material.icons.filled.ExpandLess
59+import androidx.compose.material.icons.filled.ExpandMore
60+import androidx.compose.material.icons.filled.Search
61+import androidx.compose.material.icons.filled.KeyboardArrowDown
62+import androidx.compose.material.icons.filled.KeyboardArrowUp
63+import androidx.compose.material.icons.filled.Mic
64+import androidx.compose.material.icons.filled.MoreVert
65+import androidx.compose.material.icons.filled.PhotoCamera
66+import androidx.compose.material.icons.filled.PhotoLibrary
67+import androidx.compose.material.icons.filled.Refresh
68+import androidx.compose.material.icons.filled.Restore
69+import androidx.compose.material.icons.automirrored.filled.PlaylistAdd
70+import androidx.compose.material.icons.automirrored.filled.Reply
71+import androidx.compose.material.icons.filled.Schedule
72+import androidx.compose.material.icons.filled.Stop
73+import androidx.compose.material3.AlertDialog
74+import androidx.compose.material3.Badge
75+import androidx.compose.material3.BadgedBox
76+import androidx.compose.material3.Button
77+import androidx.compose.material3.CircularProgressIndicator
78+import androidx.compose.material3.SmallFloatingActionButton
79+import androidx.compose.material3.DropdownMenu
80+import androidx.compose.material3.DropdownMenuItem
81+import androidx.compose.material3.ExperimentalMaterial3Api
82+import androidx.compose.material3.ExtendedFloatingActionButton
83+import androidx.compose.material3.FloatingActionButton
84+import androidx.compose.material3.Icon
85+import androidx.compose.material3.IconButton
86+import androidx.compose.material3.MaterialTheme
87+import androidx.compose.material3.OutlinedTextField
88+import androidx.compose.material3.Scaffold
89+import androidx.compose.material3.SnackbarDuration
90+import androidx.compose.material3.SwipeToDismissBox
91+import androidx.compose.material3.SwipeToDismissBoxValue
92+import androidx.compose.material3.rememberSwipeToDismissBoxState
93+import androidx.compose.material3.SnackbarHost
94+import androidx.compose.material3.SnackbarHostState
95+import androidx.compose.material3.SnackbarResult
96+import androidx.compose.material3.Surface
97+import androidx.compose.material3.Text
98+import androidx.compose.material3.TextButton
99+import androidx.compose.material3.TopAppBar
100+import androidx.compose.material3.pulltorefresh.PullToRefreshBox
101+import androidx.compose.runtime.Composable
102+import androidx.compose.runtime.CompositionLocalProvider
103+import androidx.compose.runtime.DisposableEffect
104+import androidx.compose.runtime.LaunchedEffect
105+import androidx.compose.runtime.derivedStateOf
106+import androidx.compose.runtime.getValue
107+import androidx.compose.runtime.mutableIntStateOf
108+import androidx.compose.runtime.mutableLongStateOf
109+import androidx.compose.runtime.mutableStateOf
110+import androidx.compose.runtime.produceState
111+import androidx.compose.runtime.remember
112+import androidx.compose.runtime.rememberCoroutineScope
113+import androidx.compose.runtime.rememberUpdatedState
114+import androidx.compose.runtime.saveable.rememberSaveable
115+import androidx.compose.runtime.setValue
116+import androidx.compose.runtime.snapshotFlow
117+import androidx.compose.foundation.text.KeyboardActions
118+import androidx.compose.foundation.text.KeyboardOptions
119+import androidx.compose.ui.text.input.KeyboardCapitalization
120+import androidx.compose.ui.Alignment
121+import androidx.compose.ui.Modifier
122+import androidx.compose.ui.draw.alpha
123+import androidx.compose.ui.draw.clip
124+import androidx.compose.ui.focus.focusRequester
125+import androidx.compose.ui.input.key.Key
126+import androidx.compose.ui.input.key.KeyEventType
127+import androidx.compose.ui.input.key.isCtrlPressed
128+import androidx.compose.ui.input.key.isShiftPressed
129+import androidx.compose.ui.input.key.key
130+import androidx.compose.ui.input.key.onPreviewKeyEvent
131+import androidx.compose.ui.input.key.type
132+import androidx.compose.ui.layout.onSizeChanged
133+import androidx.compose.ui.platform.LocalContext
134+import androidx.compose.ui.platform.LocalDensity
135+import androidx.compose.ui.platform.LocalHapticFeedback
136+import androidx.compose.ui.platform.LocalLayoutDirection
137+import androidx.compose.ui.platform.LocalView
138+import androidx.compose.ui.platform.testTag
139+import androidx.compose.ui.unit.LayoutDirection
140+import androidx.compose.ui.res.pluralStringResource
141+import androidx.compose.ui.res.stringResource
142+import androidx.compose.ui.semantics.Role
143+import androidx.compose.ui.semantics.contentDescription
144+import androidx.compose.ui.semantics.heading
145+import androidx.compose.ui.semantics.liveRegion
146+import androidx.compose.ui.semantics.LiveRegionMode
147+import androidx.compose.ui.semantics.invisibleToUser
148+import androidx.compose.ui.semantics.semantics
149+import androidx.compose.ui.text.input.ImeAction
150+import androidx.compose.ui.text.style.TextOverflow
151+import androidx.compose.ui.unit.dp
152+import androidx.lifecycle.compose.collectAsStateWithLifecycle
153+import androidx.lifecycle.viewmodel.compose.viewModel
154+import kotlinx.coroutines.Dispatchers
155+import kotlinx.coroutines.coroutineScope
156+import kotlinx.coroutines.delay
157+import kotlinx.coroutines.flow.distinctUntilChanged
158+import kotlinx.coroutines.launch
159+import kotlinx.coroutines.withContext
160+import soy.iko.opencode.data.model.Part
161+import soy.iko.opencode.data.model.MessageWithParts
162+import soy.iko.opencode.data.model.AssistantMessage
163+import soy.iko.opencode.data.model.Command
164+import soy.iko.opencode.data.model.ReasoningPart
165+import soy.iko.opencode.data.model.TextPart
166+import soy.iko.opencode.data.model.ToolCompleted
167+import soy.iko.opencode.data.model.ToolError
168+import soy.iko.opencode.data.model.ToolPart
169+import soy.iko.opencode.data.model.ToolRunning
170+import soy.iko.opencode.data.model.FilePart
171+import soy.iko.opencode.data.model.sourcePath
172+import soy.iko.opencode.data.model.inputElement
173+import soy.iko.opencode.data.network.EventStreamClient
174+import soy.iko.opencode.data.network.NetworkConfig
175+import soy.iko.opencode.di.AppContainer
176+import soy.iko.opencode.R
177+import soy.iko.opencode.ui.components.CommandPalette
178+import soy.iko.opencode.ui.components.ConnectionBanner
179+import soy.iko.opencode.ui.components.DiffView
180+import soy.iko.opencode.ui.components.PaletteAction
181+import soy.iko.opencode.ui.components.LocalReducedMotion
182+import soy.iko.opencode.ui.components.LocalSearchHighlight
183+import soy.iko.opencode.ui.components.reducedMotionAnimateItem
184+import soy.iko.opencode.ui.components.copyToClipboard
185+import soy.iko.opencode.ui.components.LocalRelativeTimeTick
186+import soy.iko.opencode.ui.components.rememberRelativeTimeTick
187+import soy.iko.opencode.ui.components.rememberVisibilityTransitions
188+import soy.iko.opencode.ui.components.showToast
189+import soy.iko.opencode.ui.components.toImageContext
190+import soy.iko.opencode.ui.vmFactory
191+import soy.iko.opencode.util.runCatchingCancellable
193+@OptIn(ExperimentalMaterial3Api::class)
196+ container: AppContainer,
199+ onOpenFile: ((String) -> Unit)? = null,
200+ onOpenSession: ((String) -> Unit)? = null,
202+ val vm: ChatViewModel = viewModel(key = sessionId, factory = vmFactory { ChatViewModel(container, sessionId) })
203+ val hasMessages by vm.hasMessages.collectAsStateWithLifecycle()
204+ val running by vm.running.collectAsStateWithLifecycle()
205+ val aborting by vm.aborting.collectAsStateWithLifecycle()
206+ val loading by vm.loading.collectAsStateWithLifecycle()
207+ val loadError by vm.loadError.collectAsStateWithLifecycle()
208+ val loadErrorInline by vm.loadErrorInline.collectAsStateWithLifecycle()
209+ val refreshing by vm.refreshing.collectAsStateWithLifecycle()
210+ val models by vm.models.collectAsStateWithLifecycle()
211+ val modelsLoading by vm.modelsLoading.collectAsStateWithLifecycle()
212+ val modelsError by vm.modelsError.collectAsStateWithLifecycle()
213+ val selectedModel by vm.selectedModel.collectAsStateWithLifecycle()
214+ val connectionState by vm.connectionState.collectAsStateWithLifecycle()
215+ val pendingPermission by vm.pendingPermission.collectAsStateWithLifecycle()
216+ val permissionProgress by vm.permissionProgress.collectAsStateWithLifecycle()
217+ val agents by vm.agents.collectAsStateWithLifecycle()
218+ val agentsLoading by vm.agentsLoading.collectAsStateWithLifecycle()
219+ val agentsError by vm.agentsError.collectAsStateWithLifecycle()
220+ val selectedAgent by vm.selectedAgent.collectAsStateWithLifecycle()
221+ val commands by vm.commands.collectAsStateWithLifecycle()
222+ val commandsLoading by vm.commandsLoading.collectAsStateWithLifecycle()
223+ val commandsError by vm.commandsError.collectAsStateWithLifecycle()
224+ val sessionTitle by vm.sessionTitle.collectAsStateWithLifecycle()
225+ val sessionDeleted by vm.sessionDeleted.collectAsStateWithLifecycle()
226+ val draft by vm.draft.collectAsStateWithLifecycle()
227+ val attachments by vm.attachments.collectAsStateWithLifecycle()
228+ val reverted by vm.reverted.collectAsStateWithLifecycle()
229+ val revertDiff by vm.revertDiff.collectAsStateWithLifecycle()
230+ val shareUrl by vm.shareUrl.collectAsStateWithLifecycle()
231+ val reconnecting by vm.reconnecting.collectAsStateWithLifecycle()
232+ val sendOnEnter by container.settingsStore.sendOnEnter.collectAsStateWithLifecycle(initialValue = true)
233+ val preferredModelId by container.settingsStore.preferredModelId.collectAsStateWithLifecycle(initialValue = "")
234+ val recentModelEntries by container.recentModelsStore.entries.collectAsStateWithLifecycle()
235+ val compactSpacing by container.settingsStore.compactMessageSpacing.collectAsStateWithLifecycle(initialValue = false)
236+ val isOnline by container.isOnline.collectAsStateWithLifecycle()
237+ val haptics = LocalHapticFeedback.current
238+ val layoutDirection = LocalLayoutDirection.current
239+ val scope = rememberCoroutineScope()
240+ val shareContext = LocalContext.current
241+ val defaultShareSubject = stringResource(R.string.share_subject)
242+ val sessionLabel = stringResource(R.string.session)
243+ val defaultModelLabel = stringResource(R.string.default_model)
244+ val subtitle = remember(selectedModel?.modelLabel, selectedAgent, defaultModelLabel) {
246+ append(selectedModel?.modelLabel ?: defaultModelLabel)
247+ selectedAgent?.let { append(" · $it") }
251+ // Connection profile (with auth) for rendering inline image attachments.
252+ // Collect as state so a server switch recomposes the image context.
253+ val activeConnection by container.activeConnection.collectAsStateWithLifecycle()
254+ val imageContext = remember(activeConnection?.profile) {
255+ activeConnection?.profile?.toImageContext()
258+ // Mark this session as read while the user is viewing it; clear on leave so new
259+ // background activity can badge it again.
260+ DisposableEffect(sessionId) {
261+ container.setCurrentSession(sessionId)
262+ onDispose { if (container.currentSession.value == sessionId) container.setCurrentSession(null) }
265+ // Navigate away when the session is deleted via SSE so the user isn't left
266+ // on a zombie screen showing a conversation that no longer exists. Surface a
267+ // toast (not a snackbar) because the screen is about to be popped — a snackbar
268+ // would be torn down before the user could read it, while a toast survives.
269+ // Covers both SSE-driven deletion (deleted on another device) and a user-
270+ // initiated delete from the chat overflow menu (deleteSession in ChatViewModel
271+ // sets the same flag on success).
272+ val deletedContext = LocalContext.current
273+ LaunchedEffect(sessionDeleted) {
274+ if (sessionDeleted) {
275+ showToast(deletedContext, deletedContext.getString(R.string.session_deleted_chat))
280+ val snackbar = remember { SnackbarHostState() }
281+ val retryLabel = stringResource(R.string.retry)
282+ val inputFocusRequester = remember { androidx.compose.ui.focus.FocusRequester() }
283+ // Dedicated focus requester for the in-conversation search field. The overflow menu's
284+ // "Find in conversation" and Ctrl+F previously called inputFocusRequester.requestFocus()
285+ // (the composer), so typing went to the composer instead of the search field.
286+ val searchFocusRequester = remember { androidx.compose.ui.focus.FocusRequester() }
287+ var showModelPicker by rememberSaveable { mutableStateOf(false) }
288+ var showAgentPicker by rememberSaveable { mutableStateOf(false) }
289+ var showTitleMenu by rememberSaveable { mutableStateOf(false) }
290+ var showCommandPicker by rememberSaveable { mutableStateOf(false) }
291+ var showExitConfirm by rememberSaveable { mutableStateOf(false) }
292+ var showStopConfirm by rememberSaveable { mutableStateOf(false) }
293+ var showOverflowMenu by rememberSaveable { mutableStateOf(false) }
294+ var showRenameDialog by rememberSaveable { mutableStateOf(false) }
295+ var showDeleteDialog by rememberSaveable { mutableStateOf(false) }
296+ var showShellDialog by rememberSaveable { mutableStateOf(false) }
297+ var showPalette by rememberSaveable { mutableStateOf(false) }
298+ var showShortcutsDialog by rememberSaveable { mutableStateOf(false) }
299+ var searchActive by rememberSaveable { mutableStateOf(false) }
300+ var chatSearch by rememberSaveable { mutableStateOf("") }
301+ // Index of the currently-focused in-conversation search match (into the filtered list).
302+ // Drives the up/down navigation: the search bar's arrows step through matches and scroll
303+ // the list to each one, mirroring desktop chat apps (the bare filtered list previously
304+ // required reading each message to find the term).
305+ var searchPos by rememberSaveable { mutableIntStateOf(0) }
306+ // Summarize and init (generate AGENTS.md) are irreversible, so a single tap is gated behind
307+ // a confirmation dialog (from both the overflow menu and the command palette).
308+ var showSummarizeConfirm by rememberSaveable { mutableStateOf(false) }
309+ var showInitConfirm by rememberSaveable { mutableStateOf(false) }
311+ // Command-palette entries (keyboard-first: Ctrl+K). Labels resolved here so the remembered
312+ // action list doesn't need a Composable context. Actions map to the same handlers the
313+ // overflow menu drives, so the palette is a keyboard shortcut to them, not a parallel path.
314+ val paletteModelLabel = stringResource(R.string.palette_switch_model)
315+ val paletteAgentLabel = stringResource(R.string.palette_choose_agent)
316+ val paletteCommandLabel = stringResource(R.string.palette_run_command)
317+ val paletteSummarizeLabel = stringResource(R.string.palette_summarize)
318+ val paletteRenameLabel = stringResource(R.string.rename_session_chat)
319+ val paletteShellLabel = stringResource(R.string.run_shell_command)
320+ val paletteActions = remember(
321+ paletteModelLabel, paletteAgentLabel, paletteCommandLabel,
322+ paletteSummarizeLabel, paletteRenameLabel, paletteShellLabel, hasMessages, running,
325+ add(PaletteAction("model", paletteModelLabel) { showModelPicker = true })
326+ add(PaletteAction("agent", paletteAgentLabel) { showAgentPicker = true })
327+ add(PaletteAction("command", paletteCommandLabel) { showCommandPicker = true })
328+ if (hasMessages && !running) add(PaletteAction("summarize", paletteSummarizeLabel) { showSummarizeConfirm = true })
329+ if (!running) add(PaletteAction("shell", paletteShellLabel) { showShellDialog = true })
330+ add(PaletteAction("rename", paletteRenameLabel) { showRenameDialog = true })
334+ // Keep the screen awake while the agent is working in *this* session. The foreground
335+ // service that holds process priority during a run is managed app-wide off
336+ // container.anyRunActive (see OpencodeApp) so it survives navigating away from the chat
337+ // mid-run — otherwise leaving the screen would drop priority and Doze could choke the
338+ // SSE stream before the completion notification fires.
339+ val currentView = LocalView.current
340+ val appContext = LocalContext.current.applicationContext
341+ DisposableEffect(running) {
342+ currentView.keepScreenOn = running
343+ onDispose { currentView.keepScreenOn = false }
346+ LaunchedEffect(Unit) {
347+ vm.errorEvents.collect { event ->
348+ // Only a failed *send* is retryable; attaching Retry to any other error (e.g. a
349+ // message-load failure) would silently re-submit the last prompt on tap.
350+ val result = if (event.retryable) {
351+ snackbar.showSnackbar(message = event.message, actionLabel = retryLabel)
353+ snackbar.showSnackbar(event.message)
355+ if (result == androidx.compose.material3.SnackbarResult.ActionPerformed) vm.retryFailed()
359+ // In-place Undo for a user-initiated session delete. The delete is deferred for an undo
360+ // window on the container; show the snackbar over the conversation the user is viewing so
361+ // they can cancel without being navigated to the session list first. If the window expires
362+ // the scheduled delete sets `sessionDeleted` and the effect below navigates away.
363+ val undoLabel = stringResource(R.string.undo)
364+ val sessionDeletedLabel = stringResource(R.string.session_deleted_chat)
365+ LaunchedEffect(Unit) {
366+ vm.deleteUndoEvents.collect {
368+ val dismisser = launch {
369+ delay(NetworkConfig.undoDeleteDelayMs)
370+ snackbar.currentSnackbarData?.dismiss()
372+ val result = snackbar.showSnackbar(
373+ message = sessionDeletedLabel,
374+ actionLabel = undoLabel,
375+ duration = SnackbarDuration.Indefinite,
378+ if (result == SnackbarResult.ActionPerformed) vm.cancelSessionDelete()
383+ // --- Attachments, voice, and share-link plumbing ---
384+ val attachTooLargeMsg = stringResource(R.string.attachment_too_large)
385+ val attachFailedMsg = stringResource(R.string.attachment_failed)
386+ val attachLimitMsg = stringResource(R.string.attachment_limit)
387+ val noCameraMsg = stringResource(R.string.no_camera_app)
388+ val noVoiceMsg = stringResource(R.string.no_voice_app)
389+ val voicePrompt = stringResource(R.string.voice_prompt)
390+ val linkCopiedMsg = stringResource(R.string.link_copied)
391+ val ttsUnavailableMsg = stringResource(R.string.tts_unavailable)
393+ // Count of picks currently being read + base64-encoded off the main thread, so the
394+ // composer can show a staging placeholder immediately (chips only materialize once done).
395+ var stagingCount by remember { mutableStateOf(0) }
396+ // Total number of files still being staged across all in-flight batches, so the
397+ // staging chip can show "Staging N files…" rather than a bare indeterminate spinner.
398+ // A separate counter from [stagingCount] (which tracks batches, not files) so a
399+ // multi-file pick reads as more work than a single-file pick.
400+ var stagingFileTotal by remember { mutableStateOf(0) }
402+ // Convert each picked Uri to a base64 attachment off the main thread, honoring the
403+ // per-prompt count cap and surfacing per-file errors without aborting the batch.
404+ fun stageUris(uris: List<Uri>) {
405+ if (uris.isEmpty()) return
408+ stagingFileTotal += uris.size
410+ uris.forEachIndexed { index, uri ->
411+ if (vm.attachments.value.size >= NetworkConfig.maxAttachments) {
412+ snackbar.showSnackbar(attachLimitMsg)
413+ // The cap dropped the rest of this batch; account for the files we
414+ // won't process so stagingFileTotal doesn't linger over-counted.
415+ stagingFileTotal -= uris.size - index
416+ return@forEachIndexed
418+ when (val result = uri.toAttachmentResult(appContext)) {
419+ is AttachmentResult.Ok -> vm.addAttachment(result.attachment)
420+ AttachmentResult.TooLarge -> snackbar.showSnackbar(attachTooLargeMsg)
421+ AttachmentResult.Failed -> snackbar.showSnackbar(attachFailedMsg)
431+ val photoPicker = rememberLauncherForActivityResult(
432+ ActivityResultContracts.PickMultipleVisualMedia(NetworkConfig.maxAttachments),
433+ ) { uris -> stageUris(uris) }
435+ val filePicker = rememberLauncherForActivityResult(
436+ ActivityResultContracts.GetMultipleContents(),
437+ ) { uris -> stageUris(uris) }
439+ // Uri survives a config change mid-capture so the TakePicture result still resolves.
440+ var pendingCaptureUri by rememberSaveable { mutableStateOf<Uri?>(null) }
441+ val cameraLauncher = rememberLauncherForActivityResult(
442+ ActivityResultContracts.TakePicture(),
444+ val uri = pendingCaptureUri
445+ pendingCaptureUri = null
446+ if (success && uri != null) stageUris(listOf(uri))
449+ val voiceLauncher = rememberLauncherForActivityResult(
450+ ActivityResultContracts.StartActivityForResult(),
452+ if (result.resultCode == Activity.RESULT_OK) {
453+ val spoken = result.data
454+ ?.getStringArrayListExtra(RecognizerIntent.EXTRA_RESULTS)
456+ ?.takeIf { it.isNotBlank() }
457+ if (spoken != null) {
458+ // Append to the existing draft rather than replacing, so dictation adds to
459+ // whatever the user already typed.
460+ val current = vm.draft.value
461+ val combined = if (current.isBlank()) spoken else "$current $spoken"
462+ vm.updateDraft(combined.take(NetworkConfig.maxDraftLengthChars))
467+ fun launchCamera() {
468+ val uri = newCameraCaptureUri(appContext)
470+ scope.launch { snackbar.showSnackbar(attachFailedMsg) }
473+ pendingCaptureUri = uri
474+ runCatching { cameraLauncher.launch(uri) }
475+ .onFailure { pendingCaptureUri = null; scope.launch { snackbar.showSnackbar(noCameraMsg) } }
479+ val intent = Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH).apply {
480+ putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL, RecognizerIntent.LANGUAGE_MODEL_FREE_FORM)
481+ putExtra(RecognizerIntent.EXTRA_PROMPT, voicePrompt)
483+ runCatching { voiceLauncher.launch(intent) }
484+ .onFailure { scope.launch { snackbar.showSnackbar(noVoiceMsg) } }
487+ // A freshly-created share link is copied to the clipboard so the user can paste it right away.
488+ LaunchedEffect(Unit) {
489+ vm.shareLinkEvents.collect { url ->
490+ copyToClipboard(shareContext, shareContext.getString(R.string.clip_label_share), url)
491+ snackbar.showSnackbar(linkCopiedMsg)
495+ // Navigate to a session freshly branched from a message (branchFrom), once it's created.
496+ // Keyed on Unit (like the sibling one-shot collectors above): keying on the onOpenSession
497+ // lambda would cancel/restart this collector whenever the lambda's identity changes, risking
498+ // a dropped branch-navigation event in the gap.
499+ val branchedMsg = stringResource(R.string.branch_created)
500+ LaunchedEffect(Unit) {
501+ vm.branchEvents.collect { newId ->
502+ showToast(shareContext, branchedMsg)
503+ onOpenSession?.invoke(newId)
507+ // Stage images shared into the app (via the system share sheet) as attachments.
508+ // Keyed on pendingSharedMedia (not Unit) so the effect re-fires when new media arrives
509+ // while this ChatScreen is already composed — which happens in two-pane mode, where the
510+ // detail ChatScreen is persistent (keyed on sessionId) and a LaunchedEffect(Unit) would
511+ // only fire on first composition. consumePendingSharedMedia() atomically drains the
512+ // pending list (compareAndSet to empty), so re-firing on the now-empty value is a no-op.
513+ val pendingSharedMedia by container.pendingSharedMedia.collectAsStateWithLifecycle()
514+ LaunchedEffect(pendingSharedMedia) {
515+ val shared = container.consumePendingSharedMedia()
516+ if (shared.isNotEmpty()) stageUris(shared.map { Uri.parse(it) })
520+ if (vm.send(draft)) {
521+ // TextHandleMove (a light tick) is semantically right for a send commit;
522+ // LongPress is reserved for long-press/swipe gestures.
523+ haptics.performHapticFeedback(androidx.compose.ui.hapticfeedback.HapticFeedbackType.TextHandleMove)
527+ BackHandler(enabled = running && !showModelPicker && !showAgentPicker && !showCommandPicker) { showExitConfirm = true }
530+ // Hardware-keyboard shortcuts (tablets / DeX / Chromebooks): Ctrl+K opens the command
531+ // palette; Escape closes it, or stops a run. onPreviewKeyEvent on the Scaffold root sees
532+ // events before the focused text field, but only Ctrl+K / Escape are consumed so normal
533+ // typing (and the composer's own Enter-to-send handling) is untouched.
534+ modifier = Modifier.onPreviewKeyEvent { ev ->
535+ if (ev.type != KeyEventType.KeyDown) return@onPreviewKeyEvent false
537+ ev.isCtrlPressed && ev.key == Key.K -> { showPalette = true; true }
538+ // Ctrl+F opens in-conversation search (the standard find shortcut), focusing
539+ // the field so the user can type immediately.
540+ ev.isCtrlPressed && ev.key == Key.F -> { searchActive = true; true }
541+ ev.key == Key.Escape && showPalette -> { showPalette = false; true }
542+ ev.key == Key.Escape && searchActive -> { searchActive = false; chatSearch = ""; true }
543+ ev.key == Key.Escape && running && !showStopConfirm && !showExitConfirm -> {
544+ showStopConfirm = true; true
552+ val changeLabel = stringResource(R.string.change_model_agent)
553+ // The subtitle reads "model · agent", so tapping the title offers *both*
554+ // — a small menu picks which picker to open. Previously the tap went
555+ // straight to the model picker, leaving the agent changeable only via
556+ // the overflow menu despite the title implying otherwise.
559+ // mergeDescendants so TalkBack reads the title/subtitle Texts as one
560+ // node; the click label rides on `clickable` (onClickLabel) instead of
561+ // an explicit contentDescription, which would have SUPPRESSED the child
562+ // Texts and announced only "Change model and agent".
566+ onClickLabel = changeLabel,
567+ ) { showTitleMenu = true }
568+ .semantics(mergeDescendants = true) {},
569+ verticalAlignment = Alignment.CenterVertically,
571+ Column(modifier = Modifier.weight(1f, fill = false)) {
572+ // maxLines=1 + Ellipsis so a long session title can't wrap and
573+ // push the top bar to multiple lines, shifting the whole layout.
575+ sessionTitle ?: sessionLabel,
577+ overflow = TextOverflow.Ellipsis,
581+ style = MaterialTheme.typography.labelSmall,
582+ color = MaterialTheme.colorScheme.onSurfaceVariant,
584+ overflow = TextOverflow.Ellipsis,
587+ // Always show the affordance so the title reads as tappable even when
588+ // the model catalog failed to load (models empty). Without it the title
589+ // is indistinguishable from plain text and the pickers are effectively
590+ // undiscoverable — and the dropdown items already disable themselves
591+ // while a catalog is loading or unavailable.
593+ Icons.Filled.KeyboardArrowDown,
594+ contentDescription = null,
595+ tint = MaterialTheme.colorScheme.onSurfaceVariant,
596+ modifier = Modifier.size(20.dp),
599+ DropdownMenu(expanded = showTitleMenu, onDismissRequest = { showTitleMenu = false }) {
601+ text = { Text(stringResource(R.string.palette_switch_model)) },
602+ enabled = !modelsLoading || models.isNotEmpty(),
603+ onClick = { showTitleMenu = false; showModelPicker = true },
606+ text = { Text(stringResource(R.string.palette_choose_agent)) },
607+ enabled = !agentsLoading || agents.isNotEmpty(),
608+ onClick = { showTitleMenu = false; showAgentPicker = true },
614+ IconButton(onClick = {
615+ if (running) showExitConfirm = true else onBack()
617+ Icon(Icons.AutoMirrored.Filled.ArrowBack, contentDescription = stringResource(R.string.back))
621+ // At-a-glance run status in the top bar. When the user is scrolled
622+ // up (jump-to-latest FAB visible), the input-bar Stop button and the
623+ // trailing "working…" row are off-screen, so a top-bar spinner is the
624+ // only signal the agent is still working.
626+ val workingLabel = stringResource(R.string.working)
627+ CircularProgressIndicator(
628+ Modifier.size(18.dp).semantics { contentDescription = workingLabel },
632+ // Manual refresh: forces an SSE reconnect, which re-seeds messages
633+ // from REST. A recovery path when the stream silently drops and the
634+ // auto-reconnect re-seed is slow or fails. Shows a brief spinner as
635+ // immediate tap feedback — the SSE reconnect may not visibly change
636+ // the connection state when already Connected, so without it the tap
637+ // appears to do nothing.
638+ val refreshLabel = stringResource(R.string.refresh)
640+ onClick = { vm.refreshMessages() },
641+ enabled = activeConnection != null && !refreshing,
644+ CircularProgressIndicator(
645+ Modifier.size(18.dp).semantics { contentDescription = refreshLabel },
649+ Icon(Icons.Filled.Refresh, contentDescription = refreshLabel)
652+ // Overflow menu consolidates the less-frequent actions (share,
653+ // commands, agent, model, rename, delete) so the top bar stays
654+ // scannable on narrow phones — previously 5 icons crowded the bar
655+ // alongside the back button and tappable title. Catalog-loading
656+ // spinners stay inline (next to the overflow) so a load state is
657+ // visible without opening the menu.
658+ val moreLabel = stringResource(R.string.more)
659+ val loadingLabel = stringResource(R.string.loading)
660+ val shareLabel = stringResource(R.string.share_conversation)
661+ val copyAsMarkdownLabel = stringResource(R.string.copy_as_markdown)
662+ val shareAsJsonLabel = stringResource(R.string.share_as_json)
663+ val copyAsJsonLabel = stringResource(R.string.copy_as_json)
664+ val commandsLabel = stringResource(R.string.commands)
665+ val renameLabel = stringResource(R.string.rename_session_chat)
666+ val deleteLabel = stringResource(R.string.delete_session_chat)
667+ val createShareLabel = stringResource(R.string.create_share_link)
668+ val copyShareLabel = stringResource(R.string.copy_share_link)
669+ val stopShareLabel = stringResource(R.string.stop_sharing)
670+ val summarizeLabel = stringResource(R.string.summarize_conversation)
671+ val initLabel = stringResource(R.string.generate_agents_md)
672+ val shellLabel = stringResource(R.string.run_shell_command)
674+ IconButton(onClick = { showOverflowMenu = true }) {
675+ Icon(Icons.Filled.MoreVert, contentDescription = moreLabel)
678+ expanded = showOverflowMenu,
679+ onDismissRequest = { showOverflowMenu = false },
682+ text = { Text(shareLabel) },
683+ enabled = hasMessages,
685+ showOverflowMenu = false
687+ val md = withContext(Dispatchers.Default) {
688+ buildConversationMarkdown(vm.messages.value, sessionTitle)
690+ val send = android.content.Intent(android.content.Intent.ACTION_SEND).apply {
691+ type = "text/markdown"
692+ putExtra(android.content.Intent.EXTRA_SUBJECT, sessionTitle ?: defaultShareSubject)
693+ putExtra(android.content.Intent.EXTRA_TEXT, md)
695+ runCatchingCancellable { shareContext.startActivity(android.content.Intent.createChooser(send, shareLabel)) }
696+ .onFailure { showToast(shareContext, shareContext.getString(R.string.no_share_app)) }
700+ // Copy the whole conversation as Markdown to the clipboard, so a
701+ // user can paste into another app without the share-sheet round-trip.
703+ text = { Text(copyAsMarkdownLabel) },
704+ enabled = hasMessages,
706+ showOverflowMenu = false
708+ val md = withContext(Dispatchers.Default) {
709+ buildConversationMarkdown(vm.messages.value, sessionTitle)
711+ copyToClipboard(shareContext, shareContext.getString(R.string.clip_label_message), md)
715+ // Lossless JSON share: the full List<MessageWithParts> serialized with
716+ // the shared OpencodeJson, so tool outputs, file sources, and reasoning
717+ // survive verbatim (the Markdown export truncates/summarizes them).
719+ text = { Text(shareAsJsonLabel) },
720+ enabled = hasMessages,
722+ showOverflowMenu = false
724+ val json = withContext(Dispatchers.Default) {
725+ buildConversationJson(vm.messages.value)
727+ val send = android.content.Intent(android.content.Intent.ACTION_SEND).apply {
728+ type = "application/json"
729+ putExtra(android.content.Intent.EXTRA_SUBJECT, sessionTitle ?: defaultShareSubject)
730+ putExtra(android.content.Intent.EXTRA_TEXT, json)
732+ runCatchingCancellable { shareContext.startActivity(android.content.Intent.createChooser(send, shareAsJsonLabel)) }
733+ .onFailure { showToast(shareContext, shareContext.getString(R.string.no_share_app)) }
738+ text = { Text(copyAsJsonLabel) },
739+ enabled = hasMessages,
741+ showOverflowMenu = false
743+ val json = withContext(Dispatchers.Default) {
744+ buildConversationJson(vm.messages.value)
746+ copyToClipboard(shareContext, shareContext.getString(R.string.clip_label_message), json)
751+ text = { Text(commandsLabel) },
752+ enabled = !commandsLoading || commands.isNotEmpty(),
753+ onClick = { showOverflowMenu = false; showCommandPicker = true },
756+ text = { Text(stringResource(R.string.keyboard_shortcuts)) },
757+ onClick = { showOverflowMenu = false; showShortcutsDialog = true },
760+ text = { Text(stringResource(R.string.find_in_conversation)) },
762+ showOverflowMenu = false
764+ // Focus is requested by the LaunchedEffect(searchActive)
765+ // below, which waits for the search field to be composed
766+ // before requesting focus (calling requestFocus here would
767+ // target a field that isn't in the composition yet).
770+ androidx.compose.material3.HorizontalDivider()
771+ // Session sharing: create a public link, copy an existing one, or revoke it.
772+ if (shareUrl == null) {
774+ text = { Text(createShareLabel) },
775+ enabled = hasMessages,
776+ onClick = { showOverflowMenu = false; vm.shareSession() },
780+ text = { Text(copyShareLabel) },
782+ showOverflowMenu = false
784+ copyToClipboard(shareContext, shareContext.getString(R.string.clip_label_share), it)
785+ scope.launch { snackbar.showSnackbar(linkCopiedMsg) }
790+ text = { Text(stopShareLabel) },
791+ onClick = { showOverflowMenu = false; vm.unshareSession() },
795+ text = { Text(summarizeLabel) },
796+ enabled = hasMessages && !running,
797+ onClick = { showOverflowMenu = false; showSummarizeConfirm = true },
800+ text = { Text(initLabel) },
802+ onClick = { showOverflowMenu = false; showInitConfirm = true },
805+ text = { Text(shellLabel) },
807+ onClick = { showOverflowMenu = false; showShellDialog = true },
809+ androidx.compose.material3.HorizontalDivider()
811+ text = { Text(renameLabel) },
812+ onClick = { showOverflowMenu = false; showRenameDialog = true },
815+ text = { Text(deleteLabel, color = MaterialTheme.colorScheme.error) },
816+ onClick = { showOverflowMenu = false; showDeleteDialog = true },
819+ // While a catalog is initially loading (empty list + loading flag),
820+ // show a tiny inline spinner beside the overflow so the user can see
821+ // a load is in progress without opening the menu. Once loaded the
822+ // spinner disappears; the menu items are always enabled (tapping a
823+ // picker with no items shows the "no models/agents/commands" state).
824+ val catalogLoading = (commandsLoading && commands.isEmpty()) ||
825+ (agentsLoading && agents.isEmpty()) ||
826+ (modelsLoading && models.isEmpty())
827+ if (catalogLoading) {
828+ CircularProgressIndicator(
830+ .align(Alignment.TopEnd)
832+ .semantics { contentDescription = loadingLabel },
840+ snackbarHost = { SnackbarHost(snackbar) },
842+ val queuedFollowUp by vm.queuedFollowUp.collectAsStateWithLifecycle()
843+ val todoPlan by vm.todoPlan.collectAsStateWithLifecycle()
844+ val queuedOffline by vm.outbox.collectAsStateWithLifecycle()
845+ val outboxSending by container.outboxSending.collectAsStateWithLifecycle()
847+ // Pinned above the composer so the agent's plan and progress stay visible
848+ // while scrolled up mid-run; renders nothing when there's no plan.
849+ TodoPlanBar(todoPlan)
850+ val bannerMotion = rememberVisibilityTransitions()
853+ enter = bannerMotion.enter,
854+ exit = bannerMotion.exit,
858+ onUndo = { vm.unrevert() },
862+ visible = queuedOffline.isNotEmpty(),
863+ enter = bannerMotion.enter,
864+ exit = bannerMotion.exit,
867+ count = queuedOffline.size,
868+ sending = outboxSending,
869+ onFlush = { vm.flushQueued() },
870+ onDiscard = { vm.discardAllQueued() },
875+ onValueChange = vm::updateDraft,
877+ aborting = aborting,
878+ enabled = activeConnection != null,
879+ sendOnEnter = sendOnEnter,
881+ onAbort = { showStopConfirm = true },
882+ queuedFollowUp = queuedFollowUp,
883+ onQueueFollowUp = vm::queueFollowUp,
884+ onCancelQueue = { vm.queueFollowUp("") },
885+ focusRequester = inputFocusRequester,
886+ attachments = attachments,
887+ staging = stagingCount > 0,
888+ stagingFileCount = stagingFileTotal,
889+ onRemoveAttachment = vm::removeAttachment,
892+ PickVisualMediaRequest(ActivityResultContracts.PickVisualMedia.ImageOnly),
895+ onPickFile = { filePicker.launch("*/*") },
896+ onCamera = { launchCamera() },
897+ onVoice = { launchVoice() },
898+ onPasteImage = { stageUris(it) },
899+ commands = commands,
900+ onRunCommand = { cmd ->
902+ // Clear the draft so the typed /prefix doesn't linger after the
903+ // command fires (the command picker confirmation, if any, is
904+ // handled inside runCommand).
911+ // Collect messages inside the content lambda so streaming token updates
912+ // recompose only this subtree, not the top bar / input bar / 20+ other
913+ // state reads in the ChatScreen body.
914+ val messages by vm.messages.collectAsStateWithLifecycle()
915+ val optimisticStatuses by vm.optimisticStatuses.collectAsStateWithLifecycle()
916+ val listState = rememberLazyListState()
917+ val contentScope = rememberCoroutineScope()
918+ val timeTick = rememberRelativeTimeTick()
919+ // Dismiss the soft keyboard when the user scrolls the message list, a standard Android
920+ // chat affordance for reading while the IME is open. Watching isScrollInProgress via
921+ // snapshotFlow avoids wiring a nested scroll connection and fires on any scroll gesture.
922+ val keyboardController = androidx.compose.ui.platform.LocalSoftwareKeyboardController.current
923+ androidx.compose.runtime.LaunchedEffect(listState) {
924+ androidx.compose.runtime.snapshotFlow { listState.isScrollInProgress }
925+ .distinctUntilChanged()
926+ .collect { scrolling -> if (scrolling) keyboardController?.hide() }
927+ } // Group messages by day and interleave date separators so a long conversation
928+ // has visual "Today"/"Yesterday"/date breaks. Computed once per messages
929+ // emission (memoized) so a scroll-induced recomposition doesn't re-scan. Lives
930+ // outside the PullToRefreshBox so the auto-scroll effects below can reference
931+ // the same list the LazyColumn renders (separators shift the indices vs. the
932+ // raw messages list, so scroll targets must be in listItems space).
933+ val todayLabel = stringResource(R.string.today)
934+ val yesterdayLabel = stringResource(R.string.yesterday)
935+ // In-conversation search: when active, narrow to messages whose text contains the query.
936+ // Computed on the filtered set so day separators still align with the visible messages.
937+ // Debounced + off-main-thread so a keystroke-by-keystroke filter walk over a long
938+ // conversation (with many tool parts whose state stringification is non-trivial)
939+ // doesn't jank the UI. produceState yields the empty list immediately and publishes
940+ // the filtered result once the debounce settles.
941+ val searchQuery = chatSearch.trim()
942+ val searchMessages by produceState(
943+ initialValue = if (searchQuery.isEmpty()) messages else emptyList(),
947+ if (searchQuery.isEmpty()) {
950+ // Debounce: wait for the user to stop typing before running the filter,
951+ // so each keystroke doesn't kick off a fresh scan.
952+ kotlinx.coroutines.delay(NetworkConfig.chatSearchDebounceMs)
953+ // Run the filter off the main thread — the walk stringifies tool state
954+ // and scans every part of every message, which is non-trivial work for a
955+ // long conversation.
956+ value = withContext(Dispatchers.Default) {
957+ messages.filter { m ->
960+ is TextPart -> p.text.contains(searchQuery, ignoreCase = true)
961+ is ReasoningPart -> p.text.contains(searchQuery, ignoreCase = true)
963+ // Match the tool name plus its running/completed/error text and the
964+ // stringified input, so searching for an error string or a file the
965+ // tool touched actually finds the message it appeared in.
966+ p.tool.contains(searchQuery, ignoreCase = true) ||
967+ (p.state is ToolRunning && p.state.title?.contains(searchQuery, ignoreCase = true) == true) ||
968+ (p.state is ToolCompleted && (p.state.title?.contains(searchQuery, ignoreCase = true) == true ||
969+ p.state.output?.contains(searchQuery, ignoreCase = true) == true)) ||
970+ (p.state is ToolError && p.state.error?.contains(searchQuery, ignoreCase = true) == true) ||
971+ p.state.inputElement()?.toString()?.contains(searchQuery, ignoreCase = true) == true
973+ is FilePart -> p.filename?.contains(searchQuery, ignoreCase = true) == true ||
974+ p.sourcePath?.contains(searchQuery, ignoreCase = true) == true
982+ // Keep the focused-match index in range as the query (and thus the match set) changes.
983+ // A new query resets to the first match; a shrunk set clamps to the last valid index.
984+ LaunchedEffect(searchQuery, searchMessages.size) {
985+ if (searchPos >= searchMessages.size) searchPos = 0
987+ val listItems = remember(searchMessages, todayLabel, yesterdayLabel) {
988+ buildMessageListItems(searchMessages, todayLabel, yesterdayLabel)
990+ // listItems is a plain (non-snapshot) local, rebuilt each recomposition. The
991+ // derivedStateOf and snapshotFlow lambdas below are created once (keyless
992+ // remember / LaunchedEffect(Unit)); reading `listItems` directly inside them
993+ // would capture the first composition's list — which is empty, since `messages`
994+ // starts empty — freezing it forever. That pinned isPinnedToBottom at true and
995+ // AutoScrollSignal.size at 0, breaking streaming auto-scroll and the
996+ // jump-to-latest FAB. rememberUpdatedState hands those lambdas a stable State
997+ // whose value tracks the latest list.
998+ val currentListItems by rememberUpdatedState(listItems)
1000+ // New-content signal for the jump-to-latest FAB: counts how many new items arrived
1001+ // while the user was scrolled away from the bottom, cleared once they return. A count
1002+ // (vs. a bare dot) tells the user how much they missed at a glance.
1003+ var newContentCount by remember { mutableIntStateOf(0) }
1005+ val isPinnedToBottom by remember {
1007+ val lastVisible = listState.layoutInfo.visibleItemsInfo.lastOrNull()?.index ?: -1
1008+ // When a run is active, the LazyColumn has one trailing "__typing"
1009+ // item after the last list item. Account for it so "pinned to bottom"
1010+ // includes the working indicator — otherwise the pin check targets
1011+ // listItems.lastIndex, the typing row sits just below the viewport,
1012+ // and the user never sees the progress indicator even when pinned.
1013+ val items = currentListItems
1014+ val effectiveLast = if (running) items.size else items.lastIndex
1015+ lastVisible >= effectiveLast || items.isEmpty()
1019+ // Jump to the newest message once, when the conversation first loads. Guarded by a
1020+ // saveable one-shot flag so it doesn't re-fire on recomposition after a config change
1021+ // (rotation) — rememberLazyListState restores the user's scroll offset, and an
1022+ // unconditional scrollToItem here would clobber it, snapping them back to the bottom.
1023+ var didInitialScroll by rememberSaveable { mutableStateOf(false) }
1024+ LaunchedEffect(listItems.isNotEmpty()) {
1025+ if (listItems.isNotEmpty() && !didInitialScroll) {
1026+ // When a run is active the LazyColumn has a trailing "__typing" row at
1027+ // listItems.size; target it (not listItems.lastIndex) so deep-linking into a
1028+ // running session lands truly pinned to bottom and streaming auto-scroll engages.
1029+ listState.scrollToItem(if (running) listItems.size else listItems.lastIndex)
1030+ didInitialScroll = true
1034+ // When a run starts, the LazyColumn gains a trailing "__typing" row, so
1035+ // effectiveLast jumps from listItems.lastIndex to listItems.size and the
1036+ // isPinnedToBottom check flips to false the instant you send — freezing
1037+ // auto-scroll. If the user was pinned to the last item just before the run
1038+ // began, bring the typing row into view so the pin (and streaming follow) is
1039+ // preserved. Guard on the raw last-visible index (isPinnedToBottom has already
1040+ // recomputed to false by now) so we don't scroll when the user had scrolled up.
1041+ LaunchedEffect(running) {
1042+ if (running && listItems.isNotEmpty()) {
1043+ val lastVisible = listState.layoutInfo.visibleItemsInfo.lastOrNull()?.index ?: -1
1044+ if (lastVisible >= listItems.lastIndex) {
1045+ runCatchingCancellable { listState.animateScrollToItem(listItems.size) }
1050+ // Scroll the focused search match into view whenever the user steps through results with
1051+ // the up/down arrows. Resolves the filtered message to its slot in listItems (which
1052+ // includes date separators) and animates there.
1053+ LaunchedEffect(searchPos, searchQuery, listItems) {
1054+ if (!searchActive || searchQuery.isEmpty()) return@LaunchedEffect
1055+ val target = searchMessages.getOrNull(searchPos) ?: return@LaunchedEffect
1056+ val index = listItems.indexOfFirst {
1057+ it is MessageListItem.Message && it.message.info.id == target.info.id
1059+ if (index >= 0) runCatchingCancellable { listState.animateScrollToItem(index) }
1062+ // Scroll to bottom when the IME opens and the user was already pinned to bottom, so the
1063+ // latest reply stays visible as the composer rises. Without this the IME can obscure the
1064+ // last message even though the user was reading it a moment ago. WindowInsets.ime is a
1065+ // @Composable property, so we read it inside a snapshotFlow registered in the composable
1066+ // scope; the flow re-emits whenever the IME inset changes (open/close transitions).
1067+ val density = androidx.compose.ui.platform.LocalDensity.current
1068+ var wasImeOpen by remember { mutableStateOf(false) }
1069+ val imeBottomPx = WindowInsets.ime.getBottom(density)
1070+ androidx.compose.runtime.LaunchedEffect(imeBottomPx, listItems.isNotEmpty(), isPinnedToBottom) {
1071+ if (listItems.isEmpty()) return@LaunchedEffect
1072+ val imeOpen = imeBottomPx > 0
1073+ // Scroll to bottom only on the open transition (not close) and only when the user
1074+ // was already pinned to bottom — otherwise we'd yank them out of a mid-history read.
1075+ val shouldScroll = imeOpen && !wasImeOpen && isPinnedToBottom
1076+ if (shouldScroll) {
1077+ runCatchingCancellable {
1078+ listState.animateScrollToItem(if (running) listItems.size else listItems.lastIndex)
1081+ wasImeOpen = imeOpen
1084+ LaunchedEffect(Unit) {
1088+ // Track list size + the streaming length of the last part so we auto-scroll
1089+ // as content arrives, plus the pinned flag. A small data class with primitive
1090+ // fields avoids the per-frame boxing that Triple<Int,Int,Boolean> pays
1091+ // (snapshotFlow re-evaluates this lambda every snapshot), and reading only the
1092+ // last part's length is O(1) vs. a sumOf over every part. Covering reasoning
1093+ // and tool output — not just TextPart — keeps a pinned view following a long
1094+ // reasoning/tool block while it streams (previously it stalled at 0).
1095+ val lastLen = streamingContentLength(messages.lastOrNull()?.parts?.lastOrNull())
1096+ AutoScrollSignal(currentListItems.size, lastLen, isPinnedToBottom)
1097+ }.collect { signal ->
1098+ if (signal.pinned) {
1099+ // Back at the bottom: clear the new-content badge.
1100+ newContentCount = 0
1101+ if (signal.size > 0) {
1102+ // Scroll to the effective last index, including the trailing
1103+ // "__typing" row when a run is active so the working indicator
1104+ // is brought into view (not just the last message).
1105+ val items = currentListItems
1106+ val target = if (running) items.size else items.lastIndex
1107+ listState.scrollToItem(target)
1109+ } else if (signal.size > prevSize || signal.lastTextLength > prevLen) {
1110+ // Content arrived while scrolled up — increment the jump-to-latest badge.
1111+ // Only count whole new items (not per-token growth) so the number reflects
1112+ // new messages, not a token count.
1113+ if (signal.size > prevSize) newContentCount += signal.size - prevSize
1114+ else if (newContentCount == 0) newContentCount = 1
1116+ prevSize = signal.size
1117+ prevLen = signal.lastTextLength
1121+ CompositionLocalProvider(LocalRelativeTimeTick provides timeTick) {
1122+ // The bottomBar (ChatInputBar) already has imePadding, and the Scaffold's
1123+ // content padding accounts for the bottomBar's raised height, so the message
1124+ // list is already above the keyboard. Adding imePadding here would double-apply
1125+ // the IME inset and push messages too far up.
1126+ Box(modifier = Modifier.fillMaxSize().padding(padding)) {
1127+ if (activeConnection == null) {
1129+ modifier = Modifier.align(Alignment.Center).padding(24.dp),
1130+ horizontalAlignment = Alignment.CenterHorizontally,
1133+ stringResource(R.string.not_connected),
1134+ color = MaterialTheme.colorScheme.error,
1136+ Spacer(Modifier.size(12.dp))
1137+ Button(onClick = { vm.reconnect() }, enabled = !reconnecting) {
1138+ if (reconnecting) {
1139+ CircularProgressIndicator(
1140+ Modifier.size(20.dp),
1141+ color = MaterialTheme.colorScheme.onPrimary,
1142+ strokeWidth = 2.dp,
1145+ Text(stringResource(R.string.reconnect))
1150+ val bannerVisible = !isOnline || connectionState != EventStreamClient.ConnectionState.Connected
1151+ // Measure the banner's actual height instead of hardcoding 44dp. At large
1152+ // accessibility font scales the banner's labelMedium text + spinner + Retry
1153+ // button exceed 44dp, so a fixed inset lets the first message hide behind it
1154+ // (the same hazard FileViewScreen's overlay calls out). onSizeChanged only
1155+ // fires while the banner is composed (visible), so gate the inset on
1156+ // bannerVisible and fall back to 44dp until the first measurement arrives.
1157+ var bannerHeightPx by remember { mutableIntStateOf(0) }
1158+ val density = LocalDensity.current
1159+ val topPad = if (bannerVisible) {
1160+ if (bannerHeightPx > 0) {
1161+ with(density) { bannerHeightPx.toDp() } + 4.dp
1169+ state = connectionState,
1170+ modifier = Modifier.align(Alignment.TopCenter).onSizeChanged { bannerHeightPx = it.height },
1171+ isOnline = isOnline,
1172+ // On a hard failure, retry by forcing an SSE reconnect (which
1173+ // re-seeds from REST). refreshMessages is the right recovery path
1174+ // when the connection is present but the stream died; reconnect()
1175+ // is the path when the whole connection is gone (handled by the
1176+ // separate "Not connected" state below).
1177+ onRetry = { vm.refreshMessages() },
1179+ // Persistent inline error banner for a mid-conversation load failure.
1180+ // Unlike the one-shot snackbar (which fires once per streak then goes
1181+ // silent), this stays visible until the stream recovers, so a persistent
1182+ // outage doesn't read as "everything is fine" after the snackbar dismisses.
1183+ // Anchored at the top, below the connection banner, so it doesn't overlap
1184+ // the message list.
1185+ if (loadErrorInline && hasMessages) {
1187+ color = MaterialTheme.colorScheme.errorContainer,
1188+ shape = MaterialTheme.shapes.small,
1189+ modifier = Modifier
1190+ .align(Alignment.TopCenter)
1191+ .padding(top = if (bannerVisible) topPad else 8.dp)
1192+ .padding(horizontal = 16.dp)
1193+ .semantics { liveRegion = LiveRegionMode.Polite },
1196+ modifier = Modifier.padding(horizontal = 12.dp, vertical = 8.dp),
1197+ verticalAlignment = Alignment.CenterVertically,
1198+ horizontalArrangement = Arrangement.spacedBy(8.dp),
1201+ Icons.Filled.ErrorOutline,
1202+ contentDescription = null,
1203+ modifier = Modifier.size(16.dp),
1204+ tint = MaterialTheme.colorScheme.onErrorContainer,
1207+ stringResource(R.string.load_error_persistent),
1208+ style = MaterialTheme.typography.labelMedium,
1209+ color = MaterialTheme.colorScheme.onErrorContainer,
1210+ modifier = Modifier.weight(1f),
1213+ onClick = { vm.refreshMessages() },
1214+ contentPadding = androidx.compose.foundation.layout.PaddingValues(horizontal = 8.dp),
1216+ Text(stringResource(R.string.retry))
1221+ // Pull-to-refresh wraps ALL content states (loading, error, empty, list) so
1222+ // recovery is a swipe away everywhere — not just when the message list is
1223+ // populated. Previously PTR was only around the populated list, leaving the
1224+ // error/loading states reachable only via a button tap.
1226+ isRefreshing = refreshing,
1227+ onRefresh = { vm.refreshMessages() },
1228+ // Cap width and center on large screens for readability — full-width
1229+ // bubbles stretch edge-to-edge on tablets, hurting line-length comfort.
1230+ modifier = Modifier.fillMaxSize().wrapContentWidth(Alignment.CenterHorizontally)
1231+ .widthIn(max = NetworkConfig.chatContentMaxWidthDp.dp),
1233+ // Reserve top space when the banner is visible so it doesn't overlap the
1234+ // first message / state content. (topPad computed above.)
1235+ if (loading && messages.isEmpty()) {
1236+ // Skeleton bubbles pre-structure the layout so the perceived load is faster
1237+ // than a bare centered spinner and the first real messages pop into an
1238+ // already-shaped list instead of a blank-then-pop.
1239+ ChatSkeleton(topPad = topPad)
1240+ } else if (loadError && messages.isEmpty()) {
1241+ // A failed load with nothing to show. Distinct from the empty
1242+ // conversation state below — the conversation isn't empty, it
1243+ // failed to load, and offering "Start a conversation" here is
1244+ // misleading. Offer a Retry instead, mirroring SessionListScreen.
1246+ modifier = Modifier.align(Alignment.Center).padding(top = topPad).padding(24.dp),
1247+ horizontalAlignment = Alignment.CenterHorizontally,
1250+ stringResource(R.string.load_messages_failed),
1251+ color = MaterialTheme.colorScheme.error,
1253+ Spacer(Modifier.size(12.dp))
1254+ Button(onClick = { vm.refreshMessages() }) {
1255+ Text(stringResource(R.string.retry))
1258+ } else if (messages.isEmpty() && running) {
1259+ // A run just started but no parts have arrived yet — the empty list with
1260+ // only the trailing "working…" row looks broken. Reuse the skeleton bubbles
1261+ // from the initial-load branch so the perceived start latency is lower and
1262+ // the first real assistant part pops into an already-shaped list.
1263+ ChatSkeleton(topPad = topPad)
1264+ } else if (messages.isEmpty()) {
1268+ // Focus the input so the user can edit the suggestion before
1269+ // sending, instead of having to manually tap the field.
1270+ runCatching { inputFocusRequester.requestFocus() }
1272+ modifier = Modifier.align(Alignment.Center).padding(top = topPad),
1275+ val lastMessageId = messages.lastOrNull()?.info?.id
1276+ // Text-to-speech for reading assistant replies aloud; shuts down when the
1277+ // message list leaves composition.
1278+ val tts = rememberTtsController()
1279+ val speakingMessageId by tts.speakingId
1280+ val ttsState by tts.state
1281+ // Provide the in-conversation search query to the markdown renderer so matching
1282+ // text spans are highlighted in-place (in addition to the focused-row highlight
1283+ // above). Scoped to the list so cleared search stops highlighting immediately.
1284+ val activeSearchQuery = searchQuery.takeIf { searchActive && it.isNotEmpty() }
1285+ CompositionLocalProvider(LocalSearchHighlight provides activeSearchQuery) {
1288+ modifier = Modifier.fillMaxSize(),
1289+ // Extra bottom padding reserves room for the jump-to-latest FAB so it
1290+ // never floats over the last message. Top padding grows when the
1291+ // connection banner is visible so it doesn't overlap the first message.
1292+ contentPadding = PaddingValues(
1296+ bottom = 16.dp + NetworkConfig.chatListFabInsetDp.dp,
1298+ // Compact spacing (8dp) vs the default 16dp — a power-user toggle to fit
1299+ // more conversation on screen without scrolling as much.
1300+ verticalArrangement = Arrangement.spacedBy(if (compactSpacing) 8.dp else 16.dp),
1305+ contentType = { it.contentType },
1307+ // When in-conversation search is stepping through matches, highlight the
1308+ // focused one's row so the user can spot it at a glance among the filtered
1309+ // results (full in-text term highlighting would require threading the query
1310+ // through the markdown renderer; the row highlight + scroll-to-match covers
1311+ // the navigation use case desktop chat apps solve with next/prev).
1312+ val focusedMatchId = if (searchActive && searchQuery.isNotEmpty()) {
1313+ searchMessages.getOrNull(searchPos)?.info?.id
1315+ val isFocusedMatch = focusedMatchId != null &&
1316+ item is MessageListItem.Message &&
1317+ item.message.info.id == focusedMatchId
1318+ // Default placement animation so inserted/moved rows glide in. Skipped
1319+ // entirely under reduced motion so a streaming message growing in place
1320+ // doesn't animate on every token (and respects the a11y preference).
1323+ .then(reducedMotionAnimateItem())
1325+ if (isFocusedMatch) {
1326+ Modifier.background(
1327+ MaterialTheme.colorScheme.secondaryContainer,
1328+ MaterialTheme.shapes.medium,
1336+ is MessageListItem.Separator -> DateSeparator(item.label)
1337+ is MessageListItem.Message -> {
1338+ val message = item.message
1339+ // Only the last (streaming) message needs isRunning — it drives the
1340+ // reasoning-block spinner. Passing the live flag to every bubble
1341+ // makes all visible messages recompose whenever a run starts or stops.
1342+ val modelLabel = remember(message.info, models) {
1343+ (message.info as? soy.iko.opencode.data.model.AssistantMessage)
1344+ ?.let { resolveModelLabel(it, models) }
1346+ val agentLabel = remember(message.parts) {
1348+ .filterIsInstance<soy.iko.opencode.data.model.AgentPart>()
1349+ .firstOrNull { it.name.isNotBlank() }?.name
1351+ // Text used to drive swipe-to-reply (and pre-fill the quote). Empty for
1352+ // image/code-only messages, which then opt out of the swipe gesture.
1353+ val quoteText = remember(message.parts) {
1355+ .filterIsInstance<TextPart>()
1356+ .joinToString("\n\n") { it.text }
1358+ .takeIf { it.isNotEmpty() }
1360+ // Swipe-start-to-end reveals a reply affordance and triggers quote-reply,
1361+ // snapping back (the message isn't dismissed — the quote fills the composer).
1362+ // Only enabled when there's text to quote, so non-text messages don't
1363+ // capture horizontal drags (e.g. inside a horizontally-scrollable code block).
1364+ val swipeState = rememberSwipeToDismissBoxState(
1365+ confirmValueChange = { value ->
1366+ val replyValue = if (layoutDirection == LayoutDirection.Rtl) {
1367+ SwipeToDismissBoxValue.EndToStart
1369+ SwipeToDismissBoxValue.StartToEnd
1371+ if (value == replyValue && quoteText != null) {
1372+ haptics.performHapticFeedback(androidx.compose.ui.hapticfeedback.HapticFeedbackType.TextHandleMove)
1373+ vm.quoteReply(quoteText)
1374+ runCatching { inputFocusRequester.requestFocus() }
1379+ // In RTL locales, mirror the swipe direction so the reply
1380+ // gesture reads naturally (swipe from the trailing edge
1381+ // toward the leading edge), matching how LTR users swipe
1382+ // left-to-right. Without this, RTL users had no reply swipe.
1383+ val replyFromStartToEnd = layoutDirection != LayoutDirection.Rtl
1385+ state = swipeState,
1386+ enableDismissFromEndToStart = !replyFromStartToEnd && quoteText != null,
1387+ enableDismissFromStartToEnd = replyFromStartToEnd && quoteText != null,
1388+ backgroundContent = {
1390+ Modifier.fillMaxSize().padding(horizontal = 16.dp),
1391+ contentAlignment = if (replyFromStartToEnd) Alignment.CenterStart else Alignment.CenterEnd,
1394+ Icons.AutoMirrored.Filled.Reply,
1395+ contentDescription = null,
1396+ tint = MaterialTheme.colorScheme.onSurfaceVariant,
1403+ isRunning = running && message.info.id == lastMessageId,
1404+ imageContext = imageContext,
1405+ modelLabel = modelLabel,
1406+ agentLabel = agentLabel,
1407+ onOpenFile = onOpenFile,
1408+ onRevert = { vm.revertTo(message.info.id) },
1410+ // editMessage reverts to before this message (hiding it and
1411+ // everything after); the revert banner surfaces the rewind
1412+ // with an Undo. Focus + scroll the composer into view like the
1413+ // Quote action so the prefilled draft isn't off-screen.
1414+ haptics.performHapticFeedback(androidx.compose.ui.hapticfeedback.HapticFeedbackType.TextHandleMove)
1415+ vm.editMessage(message.info.id, text)
1416+ runCatching { inputFocusRequester.requestFocus() }
1417+ contentScope.launch {
1418+ runCatchingCancellable {
1419+ listState.animateScrollToItem(listItems.lastIndex.coerceAtLeast(0))
1423+ onSpeak = { text ->
1424+ if (!tts.toggle(message.info.id, text)) {
1425+ // TTS engine unavailable (init failed / not yet ready
1426+ // / blank text): surface feedback so the button doesn't
1427+ // appear dead. Throttled so a rapid double-tap (stop
1428+ // then immediate re-tap before ready) doesn't spam.
1429+ scope.launch { snackbar.showSnackbar(ttsUnavailableMsg) }
1432+ isSpeaking = message.info.id == speakingMessageId,
1433+ ttsState = if (message.info.id == speakingMessageId) ttsState else TtsState.IDLE,
1434+ onPause = { tts.pause() },
1435+ onResume = { tts.resume() },
1436+ onStop = { tts.stop() },
1437+ onQuote = { text ->
1438+ vm.quoteReply(text)
1439+ runCatching { inputFocusRequester.requestFocus() }
1441+ onBranch = { text -> vm.branchFrom(text) },
1442+ // Regenerate is only meaningful for a finished assistant reply
1443+ // (not the actively-streaming one), so gate it on !running.
1444+ onRegenerate = if (!running) {
1445+ { vm.regenerate(message.info.id) }
1447+ // Continue: resume a partial reply. Shown only for
1448+ // incomplete assistant messages (a partial reply that
1449+ // was aborted) and not while a run is active.
1450+ onContinue = if (!running && message.info is AssistantMessage && !message.info.isComplete) {
1451+ { vm.continueRun(message.info.id) }
1453+ sendStatus = optimisticStatuses[message.info.id]?.let { failed ->
1454+ if (failed) soy.iko.opencode.ui.chat.MessageSendStatus.FAILED
1455+ else soy.iko.opencode.ui.chat.MessageSendStatus.SENDING
1457+ isEdited = message.info.time?.let { it.updated != null && it.updated != it.created } == true,
1458+ onRetry = optimisticStatuses[message.info.id]?.let { failed ->
1460+ { vm.retryOptimisticMessage(message.info.id) }
1465+ onDismiss = optimisticStatuses[message.info.id]?.let { failed ->
1467+ { vm.dismissOptimistic(message.info.id) }
1473+ // Per-message share: build a single-message Markdown
1474+ // transcript off-thread and fire ACTION_SEND, mirroring the
1475+ // whole-conversation share but scoped to just this message.
1477+ val md = withContext(Dispatchers.Default) {
1478+ buildMessageMarkdown(message)
1480+ val send = android.content.Intent(android.content.Intent.ACTION_SEND).apply {
1481+ type = "text/markdown"
1482+ putExtra(android.content.Intent.EXTRA_SUBJECT, sessionTitle ?: defaultShareSubject)
1483+ putExtra(android.content.Intent.EXTRA_TEXT, md)
1485+ runCatchingCancellable { shareContext.startActivity(android.content.Intent.createChooser(send, shareContext.getString(R.string.share_message))) }
1486+ .onFailure { showToast(shareContext, shareContext.getString(R.string.no_share_app)) }
1496+ item(key = "__typing") {
1497+ val workingText = stringResource(R.string.working)
1498+ // Elapsed-since-run chip driven by the VM's runStartMs so the timer
1499+ // survives LazyColumn recycling — a local remember reset to 0:00 when
1500+ // the row was disposed and scrolled back into view. The VM stamps the
1501+ // start on the real false→true transition (send/run/init), not on
1502+ // SSE-reconnect relight, so reconnects don't restart the clock. Updates
1503+ // once per second; the value is decorative (the a11y label is the row's).
1504+ // The clock freezes when an abort is confirmed (aborting = true) so the
1505+ // user can see how long the run lasted before they stopped it, rather
1506+ // than the clock continuing to tick until SessionIdle clears _running.
1507+ val startMs by vm.runStartMs.collectAsStateWithLifecycle()
1508+ val elapsedMs by produceState(0L, startMs, aborting) {
1509+ if (startMs == 0L) return@produceState
1511+ // Freeze at the last-computed value: one final snapshot then stop.
1512+ value = (System.currentTimeMillis() - startMs).coerceAtLeast(0L)
1513+ return@produceState
1516+ value = (System.currentTimeMillis() - startMs).coerceAtLeast(0L)
1520+ val elapsedText = remember(elapsedMs) {
1521+ val total = elapsedMs / 1000
1522+ // Locale.US for stable digit formatting: on locales with
1523+ // non-ASCII digits (ar-/fa-) the default locale would render
1524+ // localized digits inside the Monospace block, breaking the
1525+ // fixed-width alignment the monospace family was chosen for.
1526+ String.format(java.util.Locale.US, "%d:%02d", total / 60, total % 60)
1529+ verticalAlignment = Alignment.CenterVertically,
1530+ // Animate this slot in/out so the working row doesn't pop in and
1531+ // jolt the message list when a run starts/stops — matching the
1532+ // AnimatedVisibility used by every other transient banner/FAB here.
1533+ modifier = Modifier
1534+ .then(reducedMotionAnimateItem())
1535+ .padding(vertical = 4.dp),
1537+ // Merge the indicator + label + clock into one TalkBack node so
1538+ // it's announced once (the working label, then the elapsed time)
1539+ // instead of "working… / working… / 0:14" with the label read
1540+ // twice. The Stop IconButton below stays separately focusable.
1542+ verticalAlignment = Alignment.CenterVertically,
1543+ modifier = Modifier.semantics(mergeDescendants = true) {
1544+ contentDescription = "$workingText $elapsedText"
1547+ CircularProgressIndicator(Modifier.size(16.dp), strokeWidth = 2.dp)
1548+ Text(workingText, style = MaterialTheme.typography.labelMedium, modifier = Modifier.padding(start = 6.dp))
1549+ Spacer(Modifier.size(8.dp))
1551+ Icons.Filled.Schedule,
1552+ contentDescription = null,
1553+ modifier = Modifier.size(14.dp),
1554+ tint = MaterialTheme.colorScheme.onSurfaceVariant,
1558+ style = MaterialTheme.typography.labelMedium,
1559+ fontFamily = androidx.compose.ui.text.font.FontFamily.Monospace,
1560+ color = MaterialTheme.colorScheme.onSurfaceVariant,
1561+ modifier = Modifier.padding(start = 4.dp),
1564+ // A trailing Stop on the working row so the run can be aborted
1565+ // without scrolling back to the composer (which may be off-screen
1566+ // while the user reads the streaming output up-thread).
1567+ Spacer(Modifier.weight(1f))
1568+ val stopLabel = stringResource(R.string.stop)
1570+ onClick = { showStopConfirm = true },
1571+ modifier = Modifier.semantics { contentDescription = stopLabel },
1573+ Icon(Icons.Filled.Stop, contentDescription = null)
1582+ // Jump-to-latest affordance when the user has scrolled away during a stream.
1583+ val fabMotion = rememberVisibilityTransitions()
1584+ AnimatedVisibility(
1585+ visible = !isPinnedToBottom && listItems.isNotEmpty(),
1586+ enter = fabMotion.enter,
1587+ exit = fabMotion.exit,
1588+ modifier = Modifier.align(Alignment.BottomEnd),
1590+ // Badge the FAB when new content arrived while the user was scrolled up, so
1591+ // they know there's something new to jump to (cleared once back at bottom).
1594+ if (newContentCount > 0) {
1595+ // Merge the count into the badge announcement so TalkBack reads
1596+ // "5 new messages" instead of the bare label and a separate number.
1597+ val newContentLabel = pluralStringResource(
1598+ R.plurals.plurals_new_messages,
1602+ Badge(modifier = Modifier.semantics { contentDescription = newContentLabel }) {
1604+ if (newContentCount > 99) "99+" else newContentCount.toString(),
1605+ modifier = Modifier.semantics { invisibleToUser() },
1610+ modifier = Modifier.padding(end = 16.dp, bottom = 16.dp),
1612+ ExtendedFloatingActionButton(
1614+ newContentCount = 0
1615+ if (listItems.isNotEmpty()) {
1616+ // Scroll to the effective last index, including the
1617+ // trailing "__typing" row when a run is active.
1618+ val target = if (running) listItems.size else listItems.lastIndex
1619+ contentScope.launch { runCatchingCancellable { listState.animateScrollToItem(target) } }
1622+ // contentDescription null: the visible "Latest" text already labels
1623+ // the FAB, so a description here makes TalkBack announce "Latest" twice.
1624+ icon = { Icon(Icons.Filled.KeyboardArrowDown, contentDescription = null) },
1625+ text = { Text(stringResource(R.string.latest)) },
1629+ // Scroll-to-top affordance: a small FAB at the start edge, visible when the
1630+ // user has scrolled down past the first few messages. Symmetric to the
1631+ // jump-to-latest FAB, for long conversations where manual fling back is tedious.
1632+ val scrolledDown by remember {
1633+ derivedStateOf { listState.firstVisibleItemIndex > 0 || listState.firstVisibleItemScrollOffset > 200 }
1635+ AnimatedVisibility(
1636+ visible = scrolledDown && listItems.size > 4,
1637+ enter = fabMotion.enter,
1638+ exit = fabMotion.exit,
1639+ modifier = Modifier.align(Alignment.BottomStart),
1641+ SmallFloatingActionButton(
1643+ contentScope.launch { runCatchingCancellable { listState.animateScrollToItem(0) } }
1645+ modifier = Modifier.padding(start = 16.dp, bottom = 16.dp),
1648+ Icons.Filled.KeyboardArrowUp,
1649+ contentDescription = stringResource(R.string.scroll_to_top),
1653+ // In-conversation search bar. Overlays the list so typing filters messages in
1654+ // place; the match count + a no-matches note give immediate feedback.
1655+ val searchMotion = rememberVisibilityTransitions()
1656+ AnimatedVisibility(
1657+ visible = searchActive,
1658+ enter = searchMotion.enter,
1659+ exit = searchMotion.exit,
1660+ modifier = Modifier.align(Alignment.TopCenter),
1663+ tonalElevation = 3.dp,
1664+ modifier = Modifier
1665+ .padding(horizontal = 12.dp, vertical = 4.dp)
1668+ // Focus the search field when the bar appears (from the overflow menu's
1669+ // "Find in conversation" or Ctrl+F), so the user can start typing
1670+ // immediately. Runs after the search field enters the composition.
1671+ LaunchedEffect(searchActive) {
1672+ if (searchActive) runCatching { searchFocusRequester.requestFocus() }
1675+ modifier = Modifier.padding(start = 8.dp, end = 4.dp),
1676+ verticalAlignment = Alignment.CenterVertically,
1679+ value = chatSearch,
1680+ onValueChange = { chatSearch = it },
1681+ modifier = Modifier.weight(1f).focusRequester(searchFocusRequester),
1682+ placeholder = { Text(stringResource(R.string.search_in_conversation)) },
1684+ leadingIcon = { Icon(Icons.Filled.Search, contentDescription = null) },
1685+ keyboardOptions = KeyboardOptions(imeAction = ImeAction.Search),
1687+ // Match counter: "N of M" where N is the focused match (1-based) and
1688+ // M is the total matching messages. Only shown when there's a query.
1689+ val matchCount = searchMessages.size
1691+ if (searchQuery.isNotEmpty() && matchCount > 0) {
1692+ stringResource(R.string.search_match_count, searchPos + 1, matchCount)
1693+ } else if (searchQuery.isNotEmpty()) {
1694+ stringResource(R.string.search_no_matches)
1696+ style = MaterialTheme.typography.labelSmall,
1697+ color = MaterialTheme.colorScheme.onSurfaceVariant,
1698+ modifier = Modifier.padding(horizontal = 4.dp),
1700+ // Step through matches (Previous / Next), disabled when there are
1701+ // fewer than two to navigate. Wrap around at the ends so repeated
1702+ // taps cycle through every hit.
1703+ val prevLabel = stringResource(R.string.find_previous)
1704+ val nextLabel = stringResource(R.string.find_next)
1707+ if (matchCount > 0) {
1708+ searchPos = (searchPos - 1 + matchCount) % matchCount
1711+ enabled = matchCount > 1,
1713+ Icon(Icons.Filled.KeyboardArrowUp, contentDescription = prevLabel)
1717+ if (matchCount > 0) {
1718+ searchPos = (searchPos + 1) % matchCount
1721+ enabled = matchCount > 1,
1723+ Icon(Icons.Filled.KeyboardArrowDown, contentDescription = nextLabel)
1725+ IconButton(onClick = {
1726+ searchActive = false
1729+ Icon(Icons.Filled.Close, contentDescription = stringResource(R.string.clear_search))
1734+ // When a search yields no matches (but the conversation isn't empty), say so
1735+ // instead of showing a blank list.
1736+ if (searchActive && searchQuery.isNotEmpty() && searchMessages.isEmpty() && messages.isNotEmpty()) {
1738+ stringResource(R.string.search_no_matches),
1739+ style = MaterialTheme.typography.bodyMedium,
1740+ color = MaterialTheme.colorScheme.onSurfaceVariant,
1741+ modifier = Modifier.align(Alignment.Center),
1749+ if (showExitConfirm) {
1751+ onDismissRequest = { showExitConfirm = false },
1752+ title = { Text(stringResource(R.string.stop_and_exit_title)) },
1753+ text = { Text(stringResource(R.string.stop_and_exit_text)) },
1755+ TextButton(onClick = {
1756+ showExitConfirm = false
1757+ haptics.performHapticFeedback(androidx.compose.ui.hapticfeedback.HapticFeedbackType.TextHandleMove)
1760+ }) { Text(stringResource(R.string.stop_and_exit)) }
1763+ TextButton(onClick = { showExitConfirm = false }) { Text(stringResource(R.string.stay)) }
1768+ if (showStopConfirm) {
1770+ onDismissRequest = { showStopConfirm = false },
1771+ title = { Text(stringResource(R.string.stop_run_title)) },
1772+ text = { Text(stringResource(R.string.stop_run_text)) },
1774+ TextButton(onClick = {
1775+ showStopConfirm = false
1776+ haptics.performHapticFeedback(androidx.compose.ui.hapticfeedback.HapticFeedbackType.TextHandleMove)
1778+ }) { Text(stringResource(R.string.stop), color = MaterialTheme.colorScheme.error) }
1781+ TextButton(onClick = { showStopConfirm = false }) { Text(stringResource(R.string.cancel)) }
1786+ if (showSummarizeConfirm) {
1788+ onDismissRequest = { showSummarizeConfirm = false },
1789+ title = { Text(stringResource(R.string.summarize_confirm_title)) },
1790+ text = { Text(stringResource(R.string.summarize_confirm_text)) },
1792+ TextButton(onClick = {
1793+ showSummarizeConfirm = false
1795+ }) { Text(stringResource(R.string.action_continue)) }
1798+ TextButton(onClick = { showSummarizeConfirm = false }) { Text(stringResource(R.string.cancel)) }
1803+ if (showInitConfirm) {
1805+ onDismissRequest = { showInitConfirm = false },
1806+ title = { Text(stringResource(R.string.init_confirm_title)) },
1807+ text = { Text(stringResource(R.string.init_confirm_text)) },
1809+ TextButton(onClick = {
1810+ showInitConfirm = false
1812+ }) { Text(stringResource(R.string.action_continue)) }
1815+ TextButton(onClick = { showInitConfirm = false }) { Text(stringResource(R.string.cancel)) }
1820+ if (showRenameDialog) {
1821+ RenameSessionChatDialog(
1822+ initialTitle = sessionTitle ?: "",
1823+ onDismiss = { showRenameDialog = false },
1824+ onConfirm = { newName ->
1825+ showRenameDialog = false
1826+ vm.renameSession(newName)
1831+ if (showDeleteDialog) {
1833+ onDismissRequest = { showDeleteDialog = false },
1834+ title = { Text(stringResource(R.string.delete_session_chat_title)) },
1835+ text = { Text(stringResource(R.string.delete_session_chat_text, sessionTitle ?: sessionLabel)) },
1837+ TextButton(onClick = {
1838+ showDeleteDialog = false
1839+ haptics.performHapticFeedback(androidx.compose.ui.hapticfeedback.HapticFeedbackType.LongPress)
1841+ }) { Text(stringResource(R.string.delete), color = MaterialTheme.colorScheme.error) }
1844+ TextButton(onClick = { showDeleteDialog = false }) { Text(stringResource(R.string.cancel)) }
1849+ if (showShellDialog) {
1850+ ShellCommandDialog(
1851+ onDismiss = { showShellDialog = false },
1853+ showShellDialog = false
1859+ if (showModelPicker) {
1860+ // Resolve persisted recent composite keys to the live ModelOption entries they refer
1861+ // to, dropping any whose model is no longer offered by the server. Ordered by
1862+ // recency (head of the store first).
1863+ val recentOptions = remember(models, recentModelEntries) {
1864+ val byKey = models.associateBy { it.providerID to it.modelID }
1865+ recentModelEntries.mapNotNull { entry ->
1866+ container.recentModelsStore.split(entry)?.let { (p, m) -> byKey[p to m] }
1871+ selected = selectedModel,
1872+ loading = modelsLoading,
1873+ error = modelsError,
1876+ container.recentModelsStore.add(it.providerID, it.modelID)
1878+ onRetry = { vm.reloadModels() },
1879+ onDismiss = { showModelPicker = false },
1880+ preferredModelId = preferredModelId,
1881+ onSetPreferredModel = { id ->
1882+ scope.launch { runCatchingCancellable { container.settingsStore.setPreferredModelId(id) } }
1884+ recent = recentOptions,
1888+ if (showAgentPicker) {
1891+ selected = selectedAgent,
1892+ loading = agentsLoading,
1893+ error = agentsError,
1894+ onSelect = { vm.selectAgent(it?.name) },
1895+ onRetry = { vm.reloadAgents() },
1896+ onDismiss = { showAgentPicker = false },
1900+ if (showCommandPicker) {
1901+ CommandPickerSheet(
1902+ commands = commands,
1903+ loading = commandsLoading,
1904+ error = commandsError,
1905+ onSelect = { vm.runCommand(it) },
1906+ onRetry = { vm.reloadCommands() },
1907+ onDismiss = { showCommandPicker = false },
1911+ pendingPermission?.let { permission ->
1913+ permission = permission,
1914+ position = permissionProgress.position,
1915+ total = permissionProgress.total,
1916+ onRespond = { response -> vm.respondPermission(permission, response) },
1921+ CommandPalette(actions = paletteActions, onDismiss = { showPalette = false })
1924+ if (showShortcutsDialog) {
1925+ // Surfaces the hardware-keyboard shortcuts (Ctrl+K palette, Escape stop, Enter send)
1926+ // that are otherwise wired but undiscoverable. A simple key/value list; Enter behavior
1927+ // depends on the "Send on Enter" setting, noted inline.
1929+ onDismissRequest = { showShortcutsDialog = false },
1930+ title = { Text(stringResource(R.string.keyboard_shortcuts_title)) },
1932+ Column(verticalArrangement = Arrangement.spacedBy(10.dp)) {
1933+ ShortcutRow("Ctrl + K", stringResource(R.string.shortcut_open_palette))
1934+ ShortcutRow("Esc", stringResource(R.string.shortcut_stop_run))
1935+ ShortcutRow("Esc", stringResource(R.string.shortcut_close))
1936+ ShortcutRow("Enter", stringResource(R.string.shortcut_send))
1937+ ShortcutRow("Shift + Enter / Ctrl + Enter", stringResource(R.string.shortcut_newline))
1941+ TextButton(onClick = { showShortcutsDialog = false }) { Text(stringResource(R.string.action_continue)) }
1948+private fun ShortcutRow(keys: String, desc: String) {
1949+ Row(verticalAlignment = Alignment.CenterVertically) {
1952+ style = MaterialTheme.typography.labelLarge,
1953+ fontFamily = androidx.compose.ui.text.font.FontFamily.Monospace,
1954+ modifier = Modifier.widthIn(min = 160.dp),
1958+ style = MaterialTheme.typography.bodyMedium,
1959+ color = MaterialTheme.colorScheme.onSurfaceVariant,
1965+ * Slash-command autocomplete: when the draft starts with "/", show a filtered dropdown
1966+ * of matching commands above the composer. Tapping a command fires it immediately.
1967+ * Extracted from [ChatInputBar] to keep that function's cyclomatic complexity under
1968+ * the detekt threshold. Suppressed while running or when the command catalog is empty.
1971+private fun SlashCommandAutocomplete(
1973+ commands: List<Command>,
1975+ onRunCommand: (Command) -> Unit,
1977+ if (running || commands.isEmpty()) return
1978+ val slashQuery = remember(value) {
1979+ if (value.startsWith("/")) value.removePrefix("/") else null
1981+ val matchingCommands = remember(slashQuery, commands) {
1982+ commands.filter { cmd ->
1983+ slashQuery.isEmpty() ||
1984+ cmd.name.contains(slashQuery, ignoreCase = true) ||
1985+ (cmd.description?.contains(slashQuery, ignoreCase = true) == true)
1988+ if (matchingCommands.isNotEmpty()) {
1989+ CommandAutocompleteDropdown(
1990+ commands = matchingCommands,
1991+ onPick = onRunCommand,
1997+ * Slash-command autocomplete dropdown shown above the composer when the draft starts
1998+ * with "/". Renders up to 8 matching commands as a scrollable, elevated surface so the
1999+ * user can discover and invoke commands by typing the conventional "/" prefix instead
2000+ * of opening the overflow menu / command palette. Tapping a row fires the command.
2003+private fun CommandAutocompleteDropdown(
2004+ commands: List<Command>,
2005+ onPick: (Command) -> Unit,
2007+ val haptics = LocalHapticFeedback.current
2009+ color = MaterialTheme.colorScheme.surface,
2010+ tonalElevation = 3.dp,
2011+ shape = MaterialTheme.shapes.medium,
2012+ modifier = Modifier
2014+ .padding(horizontal = 8.dp, vertical = 4.dp)
2015+ .heightIn(max = 240.dp),
2019+ count = commands.size,
2020+ key = { commands[it].name },
2022+ val cmd = commands[i]
2024+ modifier = Modifier
2026+ .clickable(role = Role.Button) {
2027+ haptics.performHapticFeedback(androidx.compose.ui.hapticfeedback.HapticFeedbackType.TextHandleMove)
2030+ .padding(horizontal = 16.dp, vertical = 10.dp),
2031+ verticalAlignment = Alignment.CenterVertically,
2032+ horizontalArrangement = Arrangement.spacedBy(12.dp),
2036+ style = MaterialTheme.typography.labelLarge,
2037+ fontFamily = androidx.compose.ui.text.font.FontFamily.Monospace,
2038+ color = MaterialTheme.colorScheme.primary,
2040+ cmd.description?.takeIf { it.isNotBlank() }?.let { desc ->
2043+ style = MaterialTheme.typography.bodySmall,
2044+ color = MaterialTheme.colorScheme.onSurfaceVariant,
2046+ overflow = TextOverflow.Ellipsis,
2055+@OptIn(androidx.compose.foundation.ExperimentalFoundationApi::class)
2056+@Suppress("CyclomaticComplexMethod")
2058+private fun ChatInputBar(
2060+ onValueChange: (String) -> Unit,
2064+ sendOnEnter: Boolean,
2065+ onSend: () -> Unit,
2066+ onAbort: () -> Unit,
2067+ queuedFollowUp: String?,
2068+ onQueueFollowUp: (String) -> Unit,
2069+ onCancelQueue: () -> Unit,
2070+ focusRequester: androidx.compose.ui.focus.FocusRequester,
2071+ attachments: List<PendingAttachment>,
2073+ stagingFileCount: Int,
2074+ onRemoveAttachment: (String) -> Unit,
2075+ onPickPhoto: () -> Unit,
2076+ onPickFile: () -> Unit,
2077+ onCamera: () -> Unit,
2078+ onVoice: () -> Unit,
2079+ onPasteImage: (List<Uri>) -> Unit,
2080+ commands: List<Command> = emptyList(),
2081+ onRunCommand: (Command) -> Unit = {},
2083+ // Sendable when there's text OR at least one attachment (an image-only prompt is valid).
2084+ val hasContent = value.isNotBlank() || attachments.isNotEmpty()
2085+ val context = LocalContext.current
2086+ // Full-screen editor state: opened when the user wants more space for a long prompt.
2087+ var showFullScreenEditor by rememberSaveable { mutableStateOf(false) }
2088+ Surface(tonalElevation = 3.dp, modifier = Modifier.imePadding()) {
2089+ Column(modifier = Modifier.fillMaxWidth().windowInsetsPadding(WindowInsets.navigationBars)) {
2090+ // A queued follow-up replaces the Stop button with a "queued" chip so the
2091+ // user sees their message will be sent when the run finishes, and can cancel.
2092+ if (queuedFollowUp != null) {
2093+ val editLabel = stringResource(R.string.edit)
2095+ modifier = Modifier
2097+ .padding(start = 12.dp, top = 6.dp, end = 4.dp),
2098+ verticalAlignment = Alignment.CenterVertically,
2100+ // Tapping the chip reloads the queued text into the draft (and clears the
2101+ // queue) so a typo spotted while queuing can be fixed without retyping.
2103+ modifier = Modifier
2105+ .clip(MaterialTheme.shapes.small)
2106+ .clickable(role = Role.Button, onClickLabel = editLabel) {
2107+ onValueChange(queuedFollowUp)
2110+ .padding(vertical = 4.dp),
2113+ stringResource(R.string.queued),
2114+ style = MaterialTheme.typography.labelSmall,
2115+ color = MaterialTheme.colorScheme.onSurfaceVariant,
2119+ style = MaterialTheme.typography.bodySmall,
2120+ color = MaterialTheme.colorScheme.onSurfaceVariant,
2122+ overflow = TextOverflow.Ellipsis,
2125+ TextButton(onClick = onCancelQueue, contentPadding = androidx.compose.foundation.layout.PaddingValues(horizontal = 8.dp)) {
2126+ Text(stringResource(R.string.cancel))
2130+ // Staged attachments: horizontally-scrollable thumbnails/chips, each removable.
2131+ AttachmentStrip(attachments, onRemove = onRemoveAttachment, staging = staging, stagingFileCount = stagingFileCount)
2132+ // Slash-command autocomplete: extracted to a helper to keep this function's
2133+ // complexity under the detekt threshold. Returns no-op when the draft doesn't
2134+ // start with "/" or the command catalog is empty.
2135+ SlashCommandAutocomplete(
2137+ commands = commands,
2139+ onRunCommand = onRunCommand,
2142+ modifier = Modifier.fillMaxWidth().padding(8.dp),
2143+ verticalAlignment = Alignment.Bottom,
2145+ // Attach menu: photo picker, camera, or any file.
2146+ var showAttachMenu by remember { mutableStateOf(false) }
2148+ IconButton(onClick = { showAttachMenu = true }, enabled = enabled) {
2149+ Icon(Icons.Filled.Add, contentDescription = stringResource(R.string.add_attachment))
2151+ DropdownMenu(expanded = showAttachMenu, onDismissRequest = { showAttachMenu = false }) {
2153+ leadingIcon = { Icon(Icons.Filled.PhotoLibrary, contentDescription = null) },
2154+ text = { Text(stringResource(R.string.attach_photo)) },
2155+ onClick = { showAttachMenu = false; onPickPhoto() },
2158+ leadingIcon = { Icon(Icons.Filled.PhotoCamera, contentDescription = null) },
2159+ text = { Text(stringResource(R.string.attach_camera)) },
2160+ onClick = { showAttachMenu = false; onCamera() },
2163+ leadingIcon = { Icon(Icons.Filled.Description, contentDescription = null) },
2164+ text = { Text(stringResource(R.string.attach_file)) },
2165+ onClick = { showAttachMenu = false; onPickFile() },
2169+ // Voice dictation: appends recognized speech to the draft. Hidden (not just
2170+ // disabled) when the device has no speech-recognition activity, so a user
2171+ // without a voice app doesn't get a button that only fails noisily on tap.
2172+ val voiceAvailable = remember {
2173+ val pm = context.packageManager
2174+ val intent = Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH)
2175+ pm.queryIntentActivities(intent, 0).isNotEmpty()
2177+ if (voiceAvailable) {
2178+ IconButton(onClick = onVoice, enabled = enabled) {
2179+ Icon(Icons.Filled.Mic, contentDescription = stringResource(R.string.voice_input))
2182+ // Expand to a full-screen editor for long prompts (the inline field caps at 6 lines).
2183+ IconButton(onClick = { showFullScreenEditor = true }, enabled = enabled) {
2184+ Icon(Icons.Filled.Expand, contentDescription = stringResource(R.string.expand_editor))
2188+ onValueChange = { v ->
2189+ // Cap input length so a huge paste can't stall the UI. Shares are
2190+ // capped separately in MainActivity; this guards typed/pasted drafts.
2191+ onValueChange(v.take(NetworkConfig.maxDraftLengthChars))
2193+ modifier = Modifier
2195+ .focusRequester(focusRequester)
2196+ .testTag("chat_input")
2197+ // Intercept image content pasted/dropped into the field (keyboard paste
2198+ // of a copied screenshot, drag from Files, etc.) and route it through the
2199+ // same staging path as the attach menu. Non-image content (text) falls
2200+ // through unchanged so normal typing/paste works.
2203+ androidx.compose.foundation.content.ReceiveContentListener { transferable ->
2204+ val clipData = transferable.clipEntry?.clipData
2205+ if (clipData != null) {
2206+ val imageUris = (0 until clipData.itemCount).mapNotNull { i ->
2207+ val item = clipData.getItemAt(i)
2208+ item.uri?.takeIf { uri ->
2209+ item.text == null && uri.toString().let { s ->
2210+ s.startsWith("content:") || s.startsWith("file:")
2214+ if (imageUris.isNotEmpty()) {
2215+ onPasteImage(imageUris)
2222+ .onPreviewKeyEvent { event ->
2223+ if (event.type != KeyEventType.KeyDown || event.key != Key.Enter) return@onPreviewKeyEvent false
2224+ // With "Send on Enter" on, Enter sends (Shift+Enter newlines).
2225+ // With it off, Enter inserts a newline and Ctrl+Enter sends.
2226+ val send = enterShouldSend(
2228+ hasContent = hasContent,
2229+ sendOnEnter = sendOnEnter,
2230+ shift = event.isShiftPressed,
2231+ ctrl = event.isCtrlPressed,
2234+ if (running) onQueueFollowUp(value) else onSend()
2240+ // While a run is active a typed message only queues (sends after the run), so
2241+ // the placeholder says so instead of the plain "Message…".
2243+ Text(stringResource(if (running) R.string.composer_hint_running else R.string.message_placeholder))
2247+ // Show a "N / max" countdown once the draft crosses a high fraction of
2248+ // the cap, so the user knows a paste is about to be truncated instead
2249+ // of being silently cut off. Hidden for normal short prompts to avoid
2250+ // clutter under a typical one-line message.
2252+ val threshold = (NetworkConfig.maxDraftLengthChars * NetworkConfig.draftCountdownThresholdFraction).toInt()
2253+ if (value.length >= threshold) {
2256+ R.string.draft_chars_remaining,
2257+ NetworkConfig.maxDraftLengthChars - value.length,
2258+ NetworkConfig.maxDraftLengthChars,
2260+ style = MaterialTheme.typography.labelSmall,
2261+ color = if (value.length >= NetworkConfig.maxDraftLengthChars) MaterialTheme.colorScheme.error
2262+ else MaterialTheme.colorScheme.onSurfaceVariant,
2266+ keyboardOptions = KeyboardOptions(
2267+ // When "Send on Enter" is on, expose ImeAction.Send so the soft
2268+ // keyboard shows a send key — matching the setting's intent and
2269+ // giving touch-only users a keyboard send affordance. When off,
2270+ // ImeAction.Default keeps the enter/newline key for multi-line input.
2271+ imeAction = if (sendOnEnter) ImeAction.Send else ImeAction.Default,
2272+ capitalization = KeyboardCapitalization.Sentences,
2274+ keyboardActions = KeyboardActions(
2276+ if (enabled && hasContent) onSend()
2280+ ComposerTrailingButton(
2282+ aborting = aborting,
2283+ canSend = enabled && hasContent,
2284+ canQueue = enabled && value.isNotBlank(),
2287+ onQueue = { onQueueFollowUp(value) },
2291+ if (showFullScreenEditor) {
2294+ onValueChange = onValueChange,
2295+ onDismiss = { showFullScreenEditor = false },
2297+ showFullScreenEditor = false
2298+ // Mirror the inline composer's behavior: while a run is active a send
2299+ // can't go immediately, so queue the follow-up instead of silently
2300+ // dropping it (vm.send() returns false during a run, which previously
2301+ // lost the typed message with no feedback).
2302+ if (running) onQueueFollowUp(value) else onSend()
2304+ canSend = enabled && hasContent,
2306+ sendOnEnter = sendOnEnter,
2307+ attachments = attachments,
2308+ onRemoveAttachment = onRemoveAttachment,
2310+ stagingFileCount = stagingFileCount,
2316+/** Full-screen editor dialog for composing long prompts. Gives the full viewport height to
2317+ * the text field (vs the inline 6-line cap) with a Send button and a collapse action. */
2318+@OptIn(ExperimentalMaterial3Api::class)
2320+private fun FullScreenEditor(
2322+ onValueChange: (String) -> Unit,
2323+ onDismiss: () -> Unit,
2324+ onSend: () -> Unit,
2326+ running: Boolean = false,
2327+ sendOnEnter: Boolean = false,
2328+ attachments: List<PendingAttachment> = emptyList(),
2329+ onRemoveAttachment: (String) -> Unit = {},
2330+ staging: Boolean = false,
2331+ stagingFileCount: Int = 0,
2333+ androidx.compose.ui.window.Dialog(
2334+ onDismissRequest = onDismiss,
2335+ properties = androidx.compose.ui.window.DialogProperties(usePlatformDefaultWidth = false, decorFitsSystemWindows = false),
2337+ // Cap the editor width on large screens (tablets) so the text field doesn't stretch
2338+ // edge-to-edge — matching the chat list's readability rationale. BoxWithConstraints
2339+ // gives the available width so we can center a capped-width column.
2340+ androidx.compose.foundation.layout.BoxWithConstraints(
2341+ modifier = Modifier.fillMaxSize(),
2342+ contentAlignment = Alignment.Center,
2344+ val hPad = if (maxWidth > NetworkConfig.twoPaneWidthThresholdDp.dp)
2345+ ((maxWidth - NetworkConfig.composerDialogMaxWidthDp.dp) / 2).coerceAtLeast(0.dp)
2348+ modifier = Modifier.padding(horizontal = hPad),
2350+ androidx.compose.material3.TopAppBar(
2351+ title = { Text(stringResource(R.string.compose_editor_title)) },
2353+ androidx.compose.material3.TextButton(onClick = onDismiss) {
2354+ Text(stringResource(R.string.collapse_editor))
2360+ Surface(tonalElevation = 3.dp) {
2362+ modifier = Modifier.fillMaxWidth().imePadding().padding(12.dp),
2363+ horizontalArrangement = Arrangement.End,
2365+ androidx.compose.material3.Button(onClick = onSend, enabled = canSend) {
2366+ Text(stringResource(if (running) R.string.queue else R.string.send))
2372+ Column(modifier = Modifier.fillMaxSize().padding(padding)) {
2373+ // Show staged attachments in the full-screen editor too, so a user who staged
2374+ // images then expanded for a long prompt can still see and remove them without
2375+ // collapsing first (mirrors the inline composer's AttachmentStrip).
2376+ AttachmentStrip(attachments, onRemove = onRemoveAttachment, staging = staging, stagingFileCount = stagingFileCount)
2379+ onValueChange = { v -> onValueChange(v.take(NetworkConfig.maxDraftLengthChars)) },
2380+ modifier = Modifier
2383+ // Honor the "Send on Enter" setting here too, so the full-screen
2384+ // editor matches the inline composer: Enter sends (Shift+Enter
2385+ // newlines) when on; Enter inserts a newline and Ctrl+Enter sends
2386+ // when off. Previously this hard-coded ImeAction.Default and had no
2387+ // key handler, so a hardware-keyboard user got a different behaviour
2388+ // from the inline composer depending on which they happened to open.
2389+ .onPreviewKeyEvent { event ->
2390+ if (event.type != KeyEventType.KeyDown || event.key != Key.Enter) return@onPreviewKeyEvent false
2391+ val send = enterShouldSend(
2393+ hasContent = canSend,
2394+ sendOnEnter = sendOnEnter,
2395+ shift = event.isShiftPressed,
2396+ ctrl = event.isCtrlPressed,
2398+ if (send) { onSend(); true } else false
2400+ placeholder = { Text(stringResource(R.string.message_placeholder)) },
2401+ maxLines = Int.MAX_VALUE,
2402+ keyboardOptions = KeyboardOptions(
2403+ imeAction = if (sendOnEnter) ImeAction.Send else ImeAction.Default,
2404+ capitalization = KeyboardCapitalization.Sentences,
2406+ keyboardActions = KeyboardActions(
2407+ onSend = { if (canSend) onSend() },
2416+/** Whether a hardware Enter keypress should send: never when disabled/empty; otherwise
2417+ * Enter sends (unless Shift) when send-on-Enter is on, else only Ctrl+Enter sends. */
2418+private fun enterShouldSend(
2420+ hasContent: Boolean,
2421+ sendOnEnter: Boolean,
2425+ !enabled || !hasContent -> false
2426+ sendOnEnter -> !shift
2430+/** The composer's trailing button: while a run is active a Stop (with in-flight spinner),
2431+ * preceded by a Queue button when the user has typed a follow-up; otherwise Send. Extracted so
2432+ * [ChatInputBar] stays under the complexity threshold. */
2434+private fun ComposerTrailingButton(
2439+ onSend: () -> Unit,
2440+ onAbort: () -> Unit,
2441+ onQueue: () -> Unit,
2444+ Row(verticalAlignment = Alignment.CenterVertically) {
2445+ // While a run is active the trailing action is Stop, so the only send affordance is
2446+ // the keyboard's IME action — which is a plain newline when "Send on Enter" is off.
2447+ // That leaves a touch-only user with the setting off no way to queue a follow-up
2448+ // (Ctrl+Enter needs a hardware keyboard). Surface an explicit Queue button whenever
2449+ // there's typed TEXT so queuing is always reachable, without changing the user's
2450+ // Enter-inserts-a-newline preference. Gate on typed text — not the send-oriented
2451+ // canSend, which is also true for an attachment-only composer — because queuing "" just
2452+ // calls setQueuedFollowUp(null), silently cancelling any already-queued follow-up and
2453+ // dropping the staged attachment (queued follow-ups don't carry attachments anyway).
2457+ modifier = Modifier.testTag("queue_button"),
2459+ // PlaylistAdd reads as "add to a queue/list" more clearly than a clock
2460+ // icon (which can be read as "snooze" or "later"), and isn't confused with
2461+ // the Send action sitting right beside the Stop button.
2463+ Icons.AutoMirrored.Filled.PlaylistAdd,
2464+ contentDescription = stringResource(R.string.queue_followup),
2468+ // Show a spinner while the abort REST call is in flight so the user sees the stop
2469+ // was sent, and disable to prevent a double-tap.
2472+ enabled = !aborting,
2473+ modifier = Modifier.padding(start = 4.dp).testTag("stop_button"),
2476+ val stopLabel = stringResource(R.string.stop)
2477+ CircularProgressIndicator(
2478+ Modifier.size(18.dp).semantics { contentDescription = stopLabel },
2479+ strokeWidth = 2.dp,
2482+ Icon(Icons.Filled.Stop, contentDescription = stringResource(R.string.stop))
2490+ modifier = Modifier.padding(start = 4.dp).testTag("send_button"),
2492+ // Tint the send icon with primary when there's content to send so the commit action
2493+ // draws the eye; muted otherwise. A plain enabled/disabled flip is easy to miss.
2495+ Icons.AutoMirrored.Filled.Send,
2496+ contentDescription = stringResource(R.string.send),
2497+ tint = if (canSend) MaterialTheme.colorScheme.primary
2498+ else MaterialTheme.colorScheme.onSurfaceVariant,
2504+@OptIn(androidx.compose.foundation.layout.ExperimentalLayoutApi::class)
2506+private fun EmptyConversation(
2507+ onSuggestion: (String) -> Unit,
2508+ modifier: Modifier = Modifier,
2510+ // A few example prompts so a first-time user has a one-tap path to their first
2511+ // message instead of staring at a blank input. Tapping a chip fills the draft
2512+ // (without sending) so the user can edit it before sending.
2513+ val suggestions = remember {
2515+ R.string.empty_chat_suggest_1,
2516+ R.string.empty_chat_suggest_2,
2517+ R.string.empty_chat_suggest_3,
2521+ modifier = modifier.padding(32.dp),
2522+ horizontalAlignment = Alignment.CenterHorizontally,
2525+ Icons.Filled.AutoAwesome,
2526+ contentDescription = null,
2527+ modifier = Modifier.size(48.dp),
2528+ tint = MaterialTheme.colorScheme.onSurfaceVariant,
2530+ Spacer(Modifier.size(16.dp))
2532+ stringResource(R.string.empty_chat_title),
2533+ style = MaterialTheme.typography.titleMedium,
2535+ Spacer(Modifier.size(8.dp))
2537+ stringResource(R.string.empty_chat_hint),
2538+ style = MaterialTheme.typography.bodyMedium,
2539+ color = MaterialTheme.colorScheme.onSurfaceVariant,
2541+ Spacer(Modifier.size(20.dp))
2542+ // Suggestion chips wrap across rows on narrow screens instead of stacking full-width,
2543+ // so a longer localized prompt doesn't push the chips off-screen on a phone.
2545+ modifier = Modifier.fillMaxWidth(),
2546+ horizontalArrangement = Arrangement.spacedBy(8.dp),
2547+ verticalArrangement = Arrangement.spacedBy(8.dp),
2549+ suggestions.forEach { resId ->
2550+ val text = stringResource(resId)
2551+ androidx.compose.material3.AssistChip(
2552+ onClick = { onSuggestion(text) },
2553+ label = { Text(text, style = MaterialTheme.typography.bodyMedium) },
2560+/** A banner shown while a revert checkpoint is active, offering an Undo (unrevert). When the
2561+ * server included a diff of the revert, a collapsible "Show what changed" affordance reveals
2562+ * it inline via [DiffView] so the user can see what was rolled back before deciding to undo. */
2564+private fun RevertBanner(diff: String?, onUndo: () -> Unit) {
2565+ val haptics = LocalHapticFeedback.current
2566+ var showDiff by rememberSaveable { mutableStateOf(false) }
2567+ val expandMotion = rememberVisibilityTransitions()
2569+ color = MaterialTheme.colorScheme.tertiaryContainer,
2570+ tonalElevation = 2.dp,
2571+ modifier = Modifier.fillMaxWidth(),
2575+ modifier = Modifier.fillMaxWidth().padding(start = 12.dp, end = 4.dp, top = 4.dp, bottom = 4.dp),
2576+ verticalAlignment = Alignment.CenterVertically,
2577+ horizontalArrangement = Arrangement.SpaceBetween,
2579+ Row(verticalAlignment = Alignment.CenterVertically, modifier = Modifier.weight(1f)) {
2581+ Icons.Filled.Restore,
2582+ contentDescription = null,
2583+ tint = MaterialTheme.colorScheme.onTertiaryContainer,
2584+ modifier = Modifier.size(18.dp),
2587+ stringResource(R.string.reverted_banner),
2588+ style = MaterialTheme.typography.bodySmall,
2589+ color = MaterialTheme.colorScheme.onTertiaryContainer,
2590+ modifier = Modifier.padding(start = 8.dp),
2592+ // "Show what changed" toggle, shown only when the server provided a diff.
2593+ // Collapsible so the banner stays compact by default; a user curious about
2594+ // what the revert rolled back can expand it inline without leaving the chat.
2595+ if (!diff.isNullOrBlank()) {
2598+ haptics.performHapticFeedback(androidx.compose.ui.hapticfeedback.HapticFeedbackType.TextHandleMove)
2599+ showDiff = !showDiff
2601+ contentPadding = androidx.compose.foundation.layout.PaddingValues(start = 8.dp, end = 4.dp),
2604+ if (showDiff) Icons.Filled.ExpandLess else Icons.Filled.ExpandMore,
2605+ contentDescription = null,
2606+ modifier = Modifier.size(16.dp),
2609+ stringResource(if (showDiff) R.string.revert_hide_diff else R.string.revert_show_diff),
2610+ style = MaterialTheme.typography.labelSmall,
2611+ modifier = Modifier.padding(start = 4.dp),
2616+ TextButton(onClick = {
2617+ // Haptic on undo to match the other destructive/important confirmations: a
2618+ // revert restores potentially hundreds of hidden messages.
2619+ haptics.performHapticFeedback(androidx.compose.ui.hapticfeedback.HapticFeedbackType.TextHandleMove)
2621+ }) { Text(stringResource(R.string.undo)) }
2623+ // The diff render lives inside the banner's Surface so it inherits the tertiary
2624+ // tonal container and reads as part of the banner, not a floating panel.
2625+ if (!diff.isNullOrBlank()) {
2626+ AnimatedVisibility(
2627+ visible = showDiff,
2628+ enter = expandMotion.enter,
2629+ exit = expandMotion.exit,
2631+ Column(modifier = Modifier.padding(start = 12.dp, end = 12.dp, bottom = 8.dp)) {
2633+ stringResource(R.string.revert_diff_header),
2634+ style = MaterialTheme.typography.labelSmall,
2635+ color = MaterialTheme.colorScheme.onTertiaryContainer,
2636+ modifier = Modifier.padding(bottom = 4.dp),
2638+ DiffView(diff, saveKey = "revertDiff")
2646+/** A banner shown while messages composed offline are queued in the outbox, with a
2647+ * "Send now" nudge and a discard. Shows a spinner while the queue is flushing. */
2649+private fun OutboxBanner(
2652+ onFlush: () -> Unit,
2653+ onDiscard: () -> Unit,
2655+ var showDiscardConfirm by rememberSaveable { mutableStateOf(false) }
2657+ color = MaterialTheme.colorScheme.secondaryContainer,
2658+ tonalElevation = 2.dp,
2659+ modifier = Modifier.fillMaxWidth(),
2662+ modifier = Modifier.fillMaxWidth().padding(start = 12.dp, end = 4.dp, top = 4.dp, bottom = 4.dp),
2663+ verticalAlignment = Alignment.CenterVertically,
2664+ horizontalArrangement = Arrangement.SpaceBetween,
2666+ Row(verticalAlignment = Alignment.CenterVertically, modifier = Modifier.weight(1f)) {
2668+ CircularProgressIndicator(
2669+ Modifier.size(16.dp),
2670+ strokeWidth = 2.dp,
2671+ color = MaterialTheme.colorScheme.onSecondaryContainer,
2673+ Spacer(Modifier.size(8.dp))
2677+ stringResource(R.string.outbox_sending)
2679+ val res = if (count == 1) R.string.outbox_pending_one else R.string.outbox_pending_many
2680+ stringResource(res, count)
2682+ style = MaterialTheme.typography.bodySmall,
2683+ color = MaterialTheme.colorScheme.onSecondaryContainer,
2687+ val haptics = LocalHapticFeedback.current
2688+ TextButton(onClick = onFlush) { Text(stringResource(R.string.outbox_flush)) }
2689+ TextButton(onClick = {
2690+ // Confirm before discarding all queued messages (irreversible), matching
2691+ // the confirmation pattern used by deleteSession and other destructive
2692+ // actions. Previously a single tap dropped every queued message.
2693+ haptics.performHapticFeedback(androidx.compose.ui.hapticfeedback.HapticFeedbackType.LongPress)
2694+ showDiscardConfirm = true
2696+ Text(stringResource(R.string.outbox_discard_all), color = MaterialTheme.colorScheme.error)
2701+ if (showDiscardConfirm) {
2702+ androidx.compose.material3.AlertDialog(
2703+ onDismissRequest = { showDiscardConfirm = false },
2704+ title = { Text(stringResource(R.string.discard_queued_title)) },
2705+ text = { Text(stringResource(R.string.discard_queued_text, count)) },
2707+ androidx.compose.material3.TextButton(onClick = {
2708+ showDiscardConfirm = false
2710+ }) { Text(stringResource(R.string.discard)) }
2713+ androidx.compose.material3.TextButton(onClick = { showDiscardConfirm = false }) {
2714+ Text(stringResource(R.string.cancel))
2721+/** Prompt for a one-off shell command to run in the session's worktree. */
2723+private fun ShellCommandDialog(onDismiss: () -> Unit, onRun: (String) -> Unit) {
2724+ var command by rememberSaveable { mutableStateOf("") }
2726+ onDismissRequest = onDismiss,
2727+ title = { Text(stringResource(R.string.run_shell_command)) },
2731+ onValueChange = { command = it },
2732+ modifier = Modifier.fillMaxWidth(),
2733+ placeholder = { Text(stringResource(R.string.shell_command_hint)) },
2734+ label = { Text(stringResource(R.string.shell_command_label)) },
2736+ keyboardOptions = KeyboardOptions(imeAction = ImeAction.Done),
2737+ keyboardActions = KeyboardActions(onDone = { if (command.isNotBlank()) onRun(command.trim()) }),
2742+ onClick = { if (command.isNotBlank()) onRun(command.trim()) },
2743+ enabled = command.isNotBlank(),
2744+ ) { Text(stringResource(R.string.run)) }
2746+ dismissButton = { TextButton(onClick = onDismiss) { Text(stringResource(R.string.cancel)) } },
2751+ * Change signal for the auto-scroll-on-stream watcher. Primitive fields avoid the
2752+ * boxing `Triple<Int, Int, Boolean>` would impose on every snapshot evaluation, and
2753+ * equality is structural so `snapshotFlow` emits only when something relevant changes.
2755+private data class AutoScrollSignal(val size: Int, val lastTextLength: Int, val pinned: Boolean)
2757+/** Length of the streaming content carried by [part], driving auto-scroll as it grows.
2758+ * Covers text, reasoning, and tool output so a pinned view keeps following non-text
2759+ * streaming, not just plain assistant text. O(1). */
2760+private fun streamingContentLength(part: Part?): Int = when (part) {
2761+ is TextPart -> part.text.length
2762+ is ReasoningPart -> part.text.length
2763+ is ToolPart -> when (val st = part.state) {
2764+ is ToolCompleted -> st.output?.length ?: 0
2765+ is ToolError -> st.error?.length ?: 0
2766+ is ToolRunning -> st.title?.length ?: 0
2772+/** Rename dialog for the currently-open session. Mirrors the SessionListScreen rename
2773+ * dialog but lives in the chat screen so the user can rename without backing out to
2774+ * the list. Pre-filled with the current title; the cap matches the list dialog. */
2776+private fun RenameSessionChatDialog(
2777+ initialTitle: String,
2778+ onDismiss: () -> Unit,
2779+ onConfirm: (String) -> Unit,
2781+ // Seed the field once (no key input) so a later external title change — e.g. opencode
2782+ // auto-generating a session title after the first prompt, arriving via SessionUpdated —
2783+ // doesn't re-initialize the box and discard the user's in-progress edit.
2784+ var title by rememberSaveable { mutableStateOf(initialTitle) }
2786+ onDismissRequest = onDismiss,
2787+ title = { Text(stringResource(R.string.rename_session_chat)) },
2791+ onValueChange = { v -> title = v.take(NetworkConfig.maxSessionTitleChars) },
2792+ modifier = Modifier.fillMaxWidth(),
2793+ placeholder = { Text(stringResource(R.string.session_title_hint)) },
2794+ label = { Text(stringResource(R.string.rename_session_chat)) },
2796+ keyboardOptions = KeyboardOptions(imeAction = ImeAction.Done),
2797+ keyboardActions = KeyboardActions(onDone = { if (title.isNotBlank()) onConfirm(title.trim()) }),
2801+ TextButton(onClick = { if (title.isNotBlank()) onConfirm(title.trim()) }, enabled = title.isNotBlank()) {
2802+ Text(stringResource(R.string.save))
2806+ TextButton(onClick = onDismiss) { Text(stringResource(R.string.cancel)) }
2812+ * A single item in the chat message list — either a [Message] bubble or a day
2813+ * [Separator] inserted before the first message of a new day. The separator shifts
2814+ * the LazyColumn indices vs. the raw messages list, so scroll-target math must use
2815+ * the [List] of these items (not `messages.size`/`lastIndex`).
2817+private sealed interface MessageListItem {
2819+ val contentType: Any
2821+ data class Message(val message: MessageWithParts, override val key: Any) : MessageListItem {
2822+ override val contentType: Any get() = message.info::class
2825+ data class Separator(val label: String, val ordinal: Int) : MessageListItem {
2826+ // Key on the day-occurrence ordinal, not the label: two non-contiguous groups
2827+ // can share a label (e.g. an untimestamped message — empty label — between two
2828+ // same-day messages, or two untimestamped groups), and a label-only key would
2829+ // then collide, which makes LazyColumn throw on duplicate keys. The ordinal is
2830+ // stable for a given message ordering so slots aren't needlessly recreated.
2831+ override val key: Any get() = "sep_${ordinal}_$label"
2832+ // Separators share a contentType so the LazyColumn can recycle their slots.
2833+ override val contentType: Any get() = "separator"
2838+ * Build the interleaved list of [MessageListItem]s for the message list, inserting a
2839+ * [MessageListItem.Separator] before the first message of each new calendar day. Uses
2840+ * the message's `time.created` (falling back to `updated` then `completed`) to bucket.
2841+ * Messages with no timestamp are grouped under an empty-label separator only if they
2842+ * start the list, so a server that omits timestamps doesn't suppress the first divider.
2844+ * [todayLabel]/[yesterdayLabel] are resolved by the caller (a @Composable can't call
2845+ * stringResource from inside this plain function) and used for the "Today"/"Yesterday"
2846+ * labels; older days fall back to a locale-stable medium-date format.
2848+private fun buildMessageListItems(
2849+ messages: List<MessageWithParts>,
2850+ todayLabel: String,
2851+ yesterdayLabel: String,
2852+): List<MessageListItem> {
2853+ if (messages.isEmpty()) return emptyList()
2854+ val today = java.time.LocalDate.now(java.time.ZoneId.systemDefault())
2855+ val dateFmt = mediumDateFormat()
2856+ val result = ArrayList<MessageListItem>(messages.size + 4)
2857+ val seenKeys = HashSet<String>(messages.size * 2)
2858+ var lastDayKey: String? = null
2860+ var emptyIdOrdinal = 0
2862+ for (message in messages) {
2863+ val ts = message.info.time?.created ?: message.info.time?.updated ?: message.info.time?.completed
2864+ val dayKey = ts?.let { dayKey(it) } ?: ""
2865+ // Emit a separator before the very first message (so a leading un-timestamped message
2866+ // still gets the first divider, empty label and all), and thereafter only when crossing
2867+ // into a new NON-empty calendar day. An un-timestamped message mid-list (empty key)
2868+ // neither emits its own separator nor resets the day — otherwise a following same-day
2869+ // message would see a "" -> "<today>" transition and emit a duplicate "Today" header.
2870+ if (first || (dayKey.isNotEmpty() && dayKey != lastDayKey)) {
2871+ result.add(MessageListItem.Separator(dayLabel(dayKey, ts ?: 0L, today, todayLabel, yesterdayLabel, dateFmt), sepOrdinal++))
2873+ if (dayKey.isNotEmpty()) lastDayKey = dayKey
2875+ // Most messages have a unique non-empty id. An unrecognized-role message can carry an
2876+ // empty id — and the reducer intentionally keeps several such messages as distinct
2877+ // holders — so give each a stable synthetic key and defensively de-collide any remaining
2878+ // duplicate; otherwise LazyColumn throws on a duplicate key and the whole screen crashes.
2879+ var key = message.info.id.ifEmpty { "msg-empty-${emptyIdOrdinal++}" }
2880+ if (!seenKeys.add(key)) {
2882+ while (!seenKeys.add("$key#$suffix")) suffix++
2883+ key = "$key#$suffix"
2885+ result.add(MessageListItem.Message(message, key))
2891+ * A stable bucket key for a timestamp's calendar day (epoch-days as a string).
2893+ * [buildMessageListItems] re-runs on every streaming snapshot (the memo is keyed on the
2894+ * whole `messages` list, which must stay so the live message's fresh parts render), so a
2895+ * naive implementation would re-allocate an `Instant`/`ZonedDateTime`/`LocalDate` for
2896+ * every message on every token. Message timestamps are immutable once assigned, so we
2897+ * memoize the parse per epoch-millis: after the first snapshot, each unchanged message is
2898+ * a cheap hash lookup. Bounded LRU (access-order) caps memory; only touched on the main
2899+ * thread during composition, so the coarse lock is uncontended.
2901+private val dayKeyCache = object : LinkedHashMap<Long, String>(128, 0.75f, true) {
2902+ override fun removeEldestEntry(eldest: MutableMap.MutableEntry<Long, String>): Boolean = size > 1024
2905+private fun dayKey(epochMillis: Long): String = synchronized(dayKeyCache) {
2906+ dayKeyCache.getOrPut(epochMillis) {
2907+ java.time.Instant.ofEpochMilli(epochMillis)
2908+ .atZone(java.time.ZoneId.systemDefault()).toLocalDate().toEpochDay().toString()
2912+// The medium-date formatter is an ICU locale lookup; cache one instance instead of
2913+// allocating a fresh one per buildMessageListItems call, rebuilding only if the default
2914+// locale changes at runtime. Main-thread-only, so no synchronization is needed.
2915+private var cachedDateFmt: java.text.DateFormat? = null
2916+private var cachedDateFmtLocale: java.util.Locale? = null
2918+private fun mediumDateFormat(): java.text.DateFormat {
2919+ val locale = java.util.Locale.getDefault()
2920+ val existing = cachedDateFmt
2921+ if (existing != null && cachedDateFmtLocale == locale) return existing
2922+ return java.text.DateFormat.getDateInstance(java.text.DateFormat.MEDIUM).also {
2924+ cachedDateFmtLocale = locale
2929+ * Resolve a day-key back to a human-readable label. "Today" / "Yesterday" for the
2930+ * recent days, otherwise a locale-stable medium-date format. Returns an empty string
2931+ * when [dayKey] is empty (no timestamp) so no separator is rendered for un-timestamped
2934+private fun dayLabel(
2937+ today: java.time.LocalDate,
2938+ todayLabel: String,
2939+ yesterdayLabel: String,
2940+ dateFmt: java.text.DateFormat,
2942+ if (dayKey.isEmpty()) return ""
2943+ val epochDay = dayKey.toLongOrNull() ?: return ""
2944+ val date = java.time.LocalDate.ofEpochDay(epochDay)
2946+ date == today -> todayLabel
2947+ date == today.minusDays(1) -> yesterdayLabel
2948+ else -> dateFmt.format(java.util.Date(ts))
2953+ * A centered day divider in the message list. Renders nothing for an empty label
2954+ * (the no-timestamp case) so un-timestamped messages don't get a stray blank divider.
2957+private fun DateSeparator(label: String) {
2958+ if (label.isBlank()) return
2960+ modifier = Modifier.fillMaxWidth(),
2961+ horizontalArrangement = Arrangement.Center,
2964+ color = MaterialTheme.colorScheme.surfaceVariant,
2965+ shape = MaterialTheme.shapes.small,
2966+ // Marked as a heading so TalkBack users can navigate day-by-day with the
2967+ // heading-skip gesture — the canonical affordance for date dividers in a list.
2968+ modifier = Modifier.semantics(mergeDescendants = true) { heading() },
2972+ style = MaterialTheme.typography.labelSmall,
2973+ color = MaterialTheme.colorScheme.onSurfaceVariant,
2974+ modifier = Modifier.padding(horizontal = 12.dp, vertical = 4.dp),
2980+/** Skeleton placeholder bubbles for the chat loading and run-started states. Alpha pulses
2981+ * (gated by reduced-motion) to convey ongoing work; the column carries the a11y label so
2982+ * TalkBack announces "Loading" instead of reading the skeleton bars. Rendered as a
2983+ * [BoxScope] extension so it can align itself to the top center of its host box. */
2985+private fun androidx.compose.foundation.layout.BoxScope.ChatSkeleton(topPad: androidx.compose.ui.unit.Dp) {
2986+ val loadingLabel = stringResource(R.string.loading)
2987+ val reducedMotion = LocalReducedMotion.current
2988+ val transition = rememberInfiniteTransition(label = "skeleton")
2989+ val pulse by transition.animateFloat(
2990+ initialValue = 0.35f,
2991+ targetValue = 0.7f,
2992+ animationSpec = infiniteRepeatable(tween(900), RepeatMode.Reverse),
2993+ label = "skeletonAlpha",
2995+ val skeletonAlpha = if (reducedMotion) 0.5f else pulse
2996+ val skeletonColor = MaterialTheme.colorScheme.surfaceVariant
2998+ fun bar(widthFraction: Float) {
3001+ .fillMaxWidth(widthFraction)
3003+ .clip(RoundedCornerShape(4.dp))
3004+ .background(skeletonColor)
3005+ .alpha(skeletonAlpha),
3009+ modifier = Modifier
3010+ .align(Alignment.TopCenter)
3011+ .padding(top = topPad)
3014+ .semantics { contentDescription = loadingLabel },
3015+ verticalArrangement = Arrangement.spacedBy(14.dp),
3018+ val left = i % 2 == 0
3020+ modifier = Modifier.fillMaxWidth(),
3021+ horizontalArrangement = if (left) Arrangement.Start else Arrangement.End,
3024+ modifier = Modifier.fillMaxWidth(if (left) 0.7f else 0.55f),
3025+ verticalArrangement = Arrangement.spacedBy(6.dp),