@@ -0,0 +1,3287 @@
1+@file:Suppress("TooManyFunctions")
2+
3+package soy.iko.opencode.ui.chat
4+
5+import android.app.Activity
6+import android.content.Intent
7+import android.net.Uri
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.FormatQuote
59+import androidx.compose.material.icons.filled.ExpandLess
60+import androidx.compose.material.icons.filled.ExpandMore
61+import androidx.compose.material.icons.filled.Search
62+import androidx.compose.material.icons.filled.KeyboardArrowDown
63+import androidx.compose.material.icons.filled.KeyboardArrowUp
64+import androidx.compose.material.icons.filled.Mic
65+import androidx.compose.material.icons.filled.MoreVert
66+import androidx.compose.material.icons.filled.PhotoCamera
67+import androidx.compose.material.icons.filled.PhotoLibrary
68+import androidx.compose.material.icons.filled.Refresh
69+import androidx.compose.material.icons.filled.Restore
70+import androidx.compose.material.icons.automirrored.filled.PlaylistAdd
71+import androidx.compose.material.icons.automirrored.filled.Reply
72+import androidx.compose.material.icons.filled.Schedule
73+import androidx.compose.material.icons.filled.Stop
74+import androidx.compose.material3.AlertDialog
75+import androidx.compose.material3.Badge
76+import androidx.compose.material3.BadgedBox
77+import androidx.compose.material3.Button
78+import androidx.compose.material3.CircularProgressIndicator
79+import androidx.compose.material3.SmallFloatingActionButton
80+import androidx.compose.material3.DropdownMenu
81+import androidx.compose.material3.DropdownMenuItem
82+import androidx.compose.material3.ExperimentalMaterial3Api
83+import androidx.compose.material3.ExtendedFloatingActionButton
84+import androidx.compose.material3.FloatingActionButton
85+import androidx.compose.material3.Icon
86+import androidx.compose.material3.IconButton
87+import androidx.compose.material3.MaterialTheme
88+import androidx.compose.material3.OutlinedTextField
89+import androidx.compose.material3.Scaffold
90+import androidx.compose.material3.SnackbarDuration
91+import androidx.compose.material3.SwipeToDismissBox
92+import androidx.compose.material3.SwipeToDismissBoxValue
93+import androidx.compose.material3.rememberSwipeToDismissBoxState
94+import androidx.compose.material3.SnackbarHost
95+import androidx.compose.material3.SnackbarHostState
96+import androidx.compose.material3.SnackbarResult
97+import androidx.compose.material3.Surface
98+import androidx.compose.material3.Text
99+import androidx.compose.material3.TextButton
100+import androidx.compose.material3.TopAppBar
101+import androidx.compose.material3.pulltorefresh.PullToRefreshBox
102+import androidx.compose.runtime.Composable
103+import androidx.compose.runtime.CompositionLocalProvider
104+import androidx.compose.runtime.DisposableEffect
105+import androidx.compose.runtime.LaunchedEffect
106+import androidx.compose.runtime.derivedStateOf
107+import androidx.compose.runtime.getValue
108+import androidx.compose.runtime.mutableIntStateOf
109+import androidx.compose.runtime.mutableLongStateOf
110+import androidx.compose.runtime.mutableStateOf
111+import androidx.compose.runtime.produceState
112+import androidx.compose.runtime.remember
113+import androidx.compose.runtime.rememberCoroutineScope
114+import androidx.compose.runtime.rememberUpdatedState
115+import androidx.compose.runtime.saveable.rememberSaveable
116+import androidx.compose.runtime.setValue
117+import androidx.compose.runtime.snapshotFlow
118+import androidx.compose.foundation.text.KeyboardActions
119+import androidx.compose.foundation.text.KeyboardOptions
120+import androidx.compose.ui.text.input.KeyboardCapitalization
121+import androidx.compose.ui.Alignment
122+import androidx.compose.ui.Modifier
123+import androidx.compose.ui.draw.alpha
124+import androidx.compose.ui.draw.clip
125+import androidx.compose.ui.focus.focusRequester
126+import androidx.compose.ui.input.key.Key
127+import androidx.compose.ui.input.key.KeyEventType
128+import androidx.compose.ui.input.key.isCtrlPressed
129+import androidx.compose.ui.input.key.isShiftPressed
130+import androidx.compose.ui.input.key.key
131+import androidx.compose.ui.input.key.onPreviewKeyEvent
132+import androidx.compose.ui.input.key.type
133+import androidx.compose.ui.layout.onSizeChanged
134+import androidx.compose.ui.platform.LocalContext
135+import androidx.compose.ui.platform.LocalDensity
136+import androidx.compose.ui.platform.LocalHapticFeedback
137+import androidx.compose.ui.platform.LocalLayoutDirection
138+import androidx.compose.ui.platform.LocalView
139+import androidx.compose.ui.platform.testTag
140+import androidx.compose.ui.unit.LayoutDirection
141+import androidx.compose.ui.res.pluralStringResource
142+import androidx.compose.ui.res.stringResource
143+import androidx.compose.ui.semantics.Role
144+import androidx.compose.ui.semantics.contentDescription
145+import androidx.compose.ui.semantics.heading
146+import androidx.compose.ui.semantics.liveRegion
147+import androidx.compose.ui.semantics.LiveRegionMode
148+import androidx.compose.ui.semantics.invisibleToUser
149+import androidx.compose.ui.semantics.semantics
150+import androidx.compose.ui.text.input.ImeAction
151+import androidx.compose.ui.text.style.TextOverflow
152+import androidx.compose.ui.unit.dp
153+import androidx.lifecycle.compose.collectAsStateWithLifecycle
154+import androidx.lifecycle.viewmodel.compose.viewModel
155+import kotlinx.coroutines.Dispatchers
156+import kotlinx.coroutines.coroutineScope
157+import kotlinx.coroutines.delay
158+import kotlinx.coroutines.flow.distinctUntilChanged
159+import kotlinx.coroutines.launch
160+import kotlinx.coroutines.withContext
161+import soy.iko.opencode.data.model.Part
162+import soy.iko.opencode.data.model.MessageWithParts
163+import soy.iko.opencode.data.model.AssistantMessage
164+import soy.iko.opencode.data.model.Command
165+import soy.iko.opencode.data.model.ReasoningPart
166+import soy.iko.opencode.data.model.TextPart
167+import soy.iko.opencode.data.model.ToolCompleted
168+import soy.iko.opencode.data.model.ToolError
169+import soy.iko.opencode.data.model.ToolPart
170+import soy.iko.opencode.data.model.ToolRunning
171+import soy.iko.opencode.data.model.FilePart
172+import soy.iko.opencode.data.model.sourcePath
173+import soy.iko.opencode.data.model.inputElement
174+import soy.iko.opencode.data.network.EventStreamClient
175+import soy.iko.opencode.data.network.NetworkConfig
176+import soy.iko.opencode.di.AppContainer
177+import soy.iko.opencode.R
178+import soy.iko.opencode.ui.components.CommandPalette
179+import soy.iko.opencode.ui.components.ConnectionBanner
180+import soy.iko.opencode.ui.components.DiffView
181+import soy.iko.opencode.ui.components.PaletteAction
182+import soy.iko.opencode.ui.components.LocalReducedMotion
183+import soy.iko.opencode.ui.components.LocalSearchHighlight
184+import soy.iko.opencode.ui.components.reducedMotionAnimateItem
185+import soy.iko.opencode.ui.components.copyToClipboard
186+import soy.iko.opencode.ui.components.LocalRelativeTimeTick
187+import soy.iko.opencode.ui.components.rememberRelativeTimeTick
188+import soy.iko.opencode.ui.components.rememberVisibilityTransitions
189+import soy.iko.opencode.ui.components.showToast
190+import soy.iko.opencode.ui.components.toImageContext
191+import soy.iko.opencode.ui.vmFactory
192+import soy.iko.opencode.util.runCatchingCancellable
193+
194+// Optional message id to scroll to and briefly highlight on first load (from global search).
195+// Consumed once: after the message is scrolled into view and highlighted, the focus is
196+// cleared so subsequent recompositions don't re-trigger the scroll.
197+@OptIn(ExperimentalMaterial3Api::class)
198+@Composable
199+fun ChatScreen(
200+ container: AppContainer,
201+ sessionId: String,
202+ onBack: () -> Unit,
203+ onOpenFile: ((String) -> Unit)? = null,
204+ onOpenSession: ((String) -> Unit)? = null,
205+ focusMessageId: String? = null,
206+ onEditProfile: ((String) -> Unit)? = null,
207+) {
208+ val vm: ChatViewModel = viewModel(key = sessionId, factory = vmFactory { ChatViewModel(container, sessionId) })
209+ val hasMessages by vm.hasMessages.collectAsStateWithLifecycle()
210+ val running by vm.running.collectAsStateWithLifecycle()
211+ val streamInterrupted by vm.streamInterrupted.collectAsStateWithLifecycle()
212+ val aborting by vm.aborting.collectAsStateWithLifecycle()
213+ val loading by vm.loading.collectAsStateWithLifecycle()
214+ val loadError by vm.loadError.collectAsStateWithLifecycle()
215+ val loadErrorInline by vm.loadErrorInline.collectAsStateWithLifecycle()
216+ val refreshing by vm.refreshing.collectAsStateWithLifecycle()
217+ val models by vm.models.collectAsStateWithLifecycle()
218+ val modelsLoading by vm.modelsLoading.collectAsStateWithLifecycle()
219+ val modelsError by vm.modelsError.collectAsStateWithLifecycle()
220+ val selectedModel by vm.selectedModel.collectAsStateWithLifecycle()
221+ val connectionState by vm.connectionState.collectAsStateWithLifecycle()
222+ val reconnectAttempts by vm.reconnectAttempts.collectAsStateWithLifecycle()
223+ val pendingPermission by vm.pendingPermission.collectAsStateWithLifecycle()
224+ val permissionProgress by vm.permissionProgress.collectAsStateWithLifecycle()
225+ val agents by vm.agents.collectAsStateWithLifecycle()
226+ val agentsLoading by vm.agentsLoading.collectAsStateWithLifecycle()
227+ val agentsError by vm.agentsError.collectAsStateWithLifecycle()
228+ val selectedAgent by vm.selectedAgent.collectAsStateWithLifecycle()
229+ val commands by vm.commands.collectAsStateWithLifecycle()
230+ val commandsLoading by vm.commandsLoading.collectAsStateWithLifecycle()
231+ val commandsError by vm.commandsError.collectAsStateWithLifecycle()
232+ val sessionTitle by vm.sessionTitle.collectAsStateWithLifecycle()
233+ val sessionDeleted by vm.sessionDeleted.collectAsStateWithLifecycle()
234+ val draft by vm.draft.collectAsStateWithLifecycle()
235+ val pendingQuote by vm.pendingQuote.collectAsStateWithLifecycle()
236+ val attachments by vm.attachments.collectAsStateWithLifecycle()
237+ val reverted by vm.reverted.collectAsStateWithLifecycle()
238+ val editing by vm.editing.collectAsStateWithLifecycle()
239+ val revertDiff by vm.revertDiff.collectAsStateWithLifecycle()
240+ val shareUrl by vm.shareUrl.collectAsStateWithLifecycle()
241+ val reconnecting by vm.reconnecting.collectAsStateWithLifecycle()
242+ val sendOnEnter by container.settingsStore.sendOnEnter.collectAsStateWithLifecycle(initialValue = true)
243+ val preferredModelId by container.settingsStore.preferredModelId.collectAsStateWithLifecycle(initialValue = "")
244+ val recentModelEntries by container.recentModelsStore.entries.collectAsStateWithLifecycle()
245+ val compactSpacing by container.settingsStore.compactMessageSpacing.collectAsStateWithLifecycle(initialValue = false)
246+ val notifPermission by container.settingsStore.notifPermission.collectAsStateWithLifecycle(initialValue = true)
247+ val isOnline by container.isOnline.collectAsStateWithLifecycle()
248+ val haptics = LocalHapticFeedback.current
249+ val layoutDirection = LocalLayoutDirection.current
250+ val scope = rememberCoroutineScope()
251+ val shareContext = LocalContext.current
252+ val defaultShareSubject = stringResource(R.string.share_subject)
253+ val sessionLabel = stringResource(R.string.session)
254+ val defaultModelLabel = stringResource(R.string.default_model)
255+ val subtitle = remember(selectedModel?.modelLabel, selectedAgent, defaultModelLabel) {
256+ buildString {
257+ append(selectedModel?.modelLabel ?: defaultModelLabel)
258+ selectedAgent?.let { append(" · $it") }
259+ }
260+ }
261+
262+ // Connection profile (with auth) for rendering inline image attachments.
263+ // Collect as state so a server switch recomposes the image context.
264+ val activeConnection by container.activeConnection.collectAsStateWithLifecycle()
265+ val imageContext = remember(activeConnection?.profile) {
266+ activeConnection?.profile?.toImageContext()
267+ }
268+
269+ // Mark this session as read while the user is viewing it; clear on leave so new
270+ // background activity can badge it again.
271+ DisposableEffect(sessionId) {
272+ container.setCurrentSession(sessionId)
273+ onDispose { if (container.currentSession.value == sessionId) container.setCurrentSession(null) }
274+ }
275+
276+ // Navigate away when the session is deleted via SSE so the user isn't left
277+ // on a zombie screen showing a conversation that no longer exists. Surface a
278+ // toast (not a snackbar) because the screen is about to be popped — a snackbar
279+ // would be torn down before the user could read it, while a toast survives.
280+ // Covers both SSE-driven deletion (deleted on another device) and a user-
281+ // initiated delete from the chat overflow menu (deleteSession in ChatViewModel
282+ // sets the same flag on success).
283+ val deletedContext = LocalContext.current
284+ LaunchedEffect(sessionDeleted) {
285+ if (sessionDeleted) {
286+ showToast(deletedContext, deletedContext.getString(R.string.session_deleted_chat))
287+ onBack()
288+ }
289+ }
290+
291+ val snackbar = remember { SnackbarHostState() }
292+ val retryLabel = stringResource(R.string.retry)
293+ val inputFocusRequester = remember { androidx.compose.ui.focus.FocusRequester() }
294+ // Dedicated focus requester for the in-conversation search field. The overflow menu's
295+ // "Find in conversation" and Ctrl+F previously called inputFocusRequester.requestFocus()
296+ // (the composer), so typing went to the composer instead of the search field.
297+ val searchFocusRequester = remember { androidx.compose.ui.focus.FocusRequester() }
298+ var showModelPicker by rememberSaveable { mutableStateOf(false) }
299+ var showAgentPicker by rememberSaveable { mutableStateOf(false) }
300+ var showTitleMenu by rememberSaveable { mutableStateOf(false) }
301+ var showCommandPicker by rememberSaveable { mutableStateOf(false) }
302+ var showExitConfirm by rememberSaveable { mutableStateOf(false) }
303+ var showOverflowMenu by rememberSaveable { mutableStateOf(false) }
304+ var showRenameDialog by rememberSaveable { mutableStateOf(false) }
305+ var showDeleteDialog by rememberSaveable { mutableStateOf(false) }
306+ var showShellDialog by rememberSaveable { mutableStateOf(false) }
307+ var showPalette by rememberSaveable { mutableStateOf(false) }
308+ var showShortcutsDialog by rememberSaveable { mutableStateOf(false) }
309+ var searchActive by rememberSaveable { mutableStateOf(false) }
310+ var chatSearch by rememberSaveable { mutableStateOf("") }
311+ // Index of the currently-focused in-conversation search match (into the filtered list).
312+ // Drives the up/down navigation: the search bar's arrows step through matches and scroll
313+ // the list to each one, mirroring desktop chat apps (the bare filtered list previously
314+ // required reading each message to find the term).
315+ var searchPos by rememberSaveable { mutableIntStateOf(0) }
316+ // Summarize and init (generate AGENTS.md) are irreversible, so a single tap is gated behind
317+ // a confirmation dialog (from both the overflow menu and the command palette).
318+ var showSummarizeConfirm by rememberSaveable { mutableStateOf(false) }
319+ var showInitConfirm by rememberSaveable { mutableStateOf(false) }
320+
321+ // Command-palette entries (keyboard-first: Ctrl+K). Labels resolved here so the remembered
322+ // action list doesn't need a Composable context. Actions map to the same handlers the
323+ // overflow menu drives, so the palette is a keyboard shortcut to them, not a parallel path.
324+ val paletteModelLabel = stringResource(R.string.palette_switch_model)
325+ val paletteAgentLabel = stringResource(R.string.palette_choose_agent)
326+ val paletteCommandLabel = stringResource(R.string.palette_run_command)
327+ val paletteSummarizeLabel = stringResource(R.string.palette_summarize)
328+ val paletteRenameLabel = stringResource(R.string.rename_session_chat)
329+ val paletteShellLabel = stringResource(R.string.run_shell_command)
330+ val paletteActions = remember(
331+ paletteModelLabel, paletteAgentLabel, paletteCommandLabel,
332+ paletteSummarizeLabel, paletteRenameLabel, paletteShellLabel, hasMessages, running,
333+ ) {
334+ buildList {
335+ add(PaletteAction("model", paletteModelLabel) { showModelPicker = true })
336+ add(PaletteAction("agent", paletteAgentLabel) { showAgentPicker = true })
337+ add(PaletteAction("command", paletteCommandLabel) { showCommandPicker = true })
338+ if (hasMessages && !running) add(PaletteAction("summarize", paletteSummarizeLabel) { showSummarizeConfirm = true })
339+ if (!running) add(PaletteAction("shell", paletteShellLabel) { showShellDialog = true })
340+ add(PaletteAction("rename", paletteRenameLabel) { showRenameDialog = true })
341+ }
342+ }
343+
344+ // Keep the screen awake while the agent is working in *this* session. The foreground
345+ // service that holds process priority during a run is managed app-wide off
346+ // container.anyRunActive (see OpencodeApp) so it survives navigating away from the chat
347+ // mid-run — otherwise leaving the screen would drop priority and Doze could choke the
348+ // SSE stream before the completion notification fires.
349+ val currentView = LocalView.current
350+ val appContext = LocalContext.current.applicationContext
351+ DisposableEffect(running) {
352+ currentView.keepScreenOn = running
353+ onDispose { currentView.keepScreenOn = false }
354+ }
355+
356+ LaunchedEffect(Unit) {
357+ vm.errorEvents.collect { event ->
358+ // Only a failed *send* is retryable; attaching Retry to any other error (e.g. a
359+ // message-load failure) would silently re-submit the last prompt on tap.
360+ val result = if (event.retryable) {
361+ snackbar.showSnackbar(message = event.message, actionLabel = retryLabel)
362+ } else {
363+ snackbar.showSnackbar(event.message)
364+ }
365+ if (result == androidx.compose.material3.SnackbarResult.ActionPerformed) vm.retryFailed()
366+ }
367+ }
368+
369+ // Stop-undo: abort() emits the last-sent prompt here so this collector can show a
370+ // "Stopped — Undo" snackbar. Tapping Undo re-sends the prompt, recovering an accidental
371+ // Stop without a confirmation dialog (Stop now happens on first tap).
372+ val undoStopLabel = stringResource(R.string.undo)
373+ val stoppedLabel = stringResource(R.string.run_stopped_undo)
374+ LaunchedEffect(Unit) {
375+ vm.stopUndoEvents.collect { prompt ->
376+ if (prompt != null) {
377+ val result = snackbar.showSnackbar(message = stoppedLabel, actionLabel = undoStopLabel)
378+ if (result == androidx.compose.material3.SnackbarResult.ActionPerformed) vm.resendLastPrompt()
379+ }
380+ }
381+ }
382+
383+ // In-place Undo for a user-initiated session delete. The delete is deferred for an undo
384+ // window on the container; show the snackbar over the conversation the user is viewing so
385+ // they can cancel without being navigated to the session list first. If the window expires
386+ // the scheduled delete sets `sessionDeleted` and the effect below navigates away.
387+ val undoLabel = stringResource(R.string.undo)
388+ val sessionDeletedLabel = stringResource(R.string.session_deleted_chat)
389+ LaunchedEffect(Unit) {
390+ vm.deleteUndoEvents.collect {
391+ coroutineScope {
392+ val dismisser = launch {
393+ delay(NetworkConfig.undoDeleteDelayMs)
394+ snackbar.currentSnackbarData?.dismiss()
395+ }
396+ val result = snackbar.showSnackbar(
397+ message = sessionDeletedLabel,
398+ actionLabel = undoLabel,
399+ duration = SnackbarDuration.Indefinite,
400+ )
401+ dismisser.cancel()
402+ if (result == SnackbarResult.ActionPerformed) vm.cancelSessionDelete()
403+ }
404+ }
405+ }
406+
407+ // --- Attachments, voice, and share-link plumbing ---
408+ val attachTooLargeMsg = stringResource(R.string.attachment_too_large)
409+ val attachFailedMsg = stringResource(R.string.attachment_failed)
410+ val attachLimitMsg = stringResource(R.string.attachment_limit)
411+ val noCameraMsg = stringResource(R.string.no_camera_app)
412+ val noVoiceMsg = stringResource(R.string.no_voice_app)
413+ val voicePrompt = stringResource(R.string.voice_prompt)
414+ val linkCopiedMsg = stringResource(R.string.link_copied)
415+ val ttsUnavailableMsg = stringResource(R.string.tts_unavailable)
416+
417+ // Count of picks currently being read + base64-encoded off the main thread, so the
418+ // composer can show a staging placeholder immediately (chips only materialize once done).
419+ var stagingCount by remember { mutableStateOf(0) }
420+ // Total number of files still being staged across all in-flight batches, so the
421+ // staging chip can show "Staging N files…" rather than a bare indeterminate spinner.
422+ // A separate counter from [stagingCount] (which tracks batches, not files) so a
423+ // multi-file pick reads as more work than a single-file pick.
424+ var stagingFileTotal by remember { mutableStateOf(0) }
425+
426+ // Convert each picked Uri to a base64 attachment off the main thread, honoring the
427+ // per-prompt count cap and surfacing per-file errors without aborting the batch.
428+ fun stageUris(uris: List<Uri>) {
429+ if (uris.isEmpty()) return
430+ scope.launch {
431+ stagingCount++
432+ stagingFileTotal += uris.size
433+ try {
434+ uris.forEachIndexed { index, uri ->
435+ if (vm.attachments.value.size >= NetworkConfig.maxAttachments) {
436+ snackbar.showSnackbar(attachLimitMsg)
437+ // The cap dropped the rest of this batch; account for the files we
438+ // won't process so stagingFileTotal doesn't linger over-counted.
439+ stagingFileTotal -= uris.size - index
440+ return@forEachIndexed
441+ }
442+ when (val result = uri.toAttachmentResult(appContext)) {
443+ is AttachmentResult.Ok -> vm.addAttachment(result.attachment)
444+ AttachmentResult.TooLarge -> snackbar.showSnackbar(attachTooLargeMsg)
445+ AttachmentResult.Failed -> snackbar.showSnackbar(attachFailedMsg)
446+ }
447+ stagingFileTotal--
448+ }
449+ } finally {
450+ stagingCount--
451+ }
452+ }
453+ }
454+
455+ val photoPicker = rememberLauncherForActivityResult(
456+ ActivityResultContracts.PickMultipleVisualMedia(NetworkConfig.maxAttachments),
457+ ) { uris -> stageUris(uris) }
458+
459+ val filePicker = rememberLauncherForActivityResult(
460+ ActivityResultContracts.GetMultipleContents(),
461+ ) { uris -> stageUris(uris) }
462+
463+ // Uri survives a config change mid-capture so the TakePicture result still resolves.
464+ var pendingCaptureUri by rememberSaveable { mutableStateOf<Uri?>(null) }
465+ val cameraLauncher = rememberLauncherForActivityResult(
466+ ActivityResultContracts.TakePicture(),
467+ ) { success ->
468+ val uri = pendingCaptureUri
469+ pendingCaptureUri = null
470+ if (success && uri != null) stageUris(listOf(uri))
471+ }
472+
473+ val voiceLauncher = rememberLauncherForActivityResult(
474+ ActivityResultContracts.StartActivityForResult(),
475+ ) { result ->
476+ if (result.resultCode == Activity.RESULT_OK) {
477+ val spoken = result.data
478+ ?.getStringArrayListExtra(RecognizerIntent.EXTRA_RESULTS)
479+ ?.firstOrNull()
480+ ?.takeIf { it.isNotBlank() }
481+ if (spoken != null) {
482+ // Append to the existing draft rather than replacing, so dictation adds to
483+ // whatever the user already typed.
484+ val current = vm.draft.value
485+ val combined = if (current.isBlank()) spoken else "$current $spoken"
486+ vm.updateDraft(combined.take(NetworkConfig.maxDraftLengthChars))
487+ }
488+ }
489+ }
490+
491+ fun launchCamera() {
492+ val uri = newCameraCaptureUri(appContext)
493+ if (uri == null) {
494+ scope.launch { snackbar.showSnackbar(attachFailedMsg) }
495+ return
496+ }
497+ pendingCaptureUri = uri
498+ runCatching { cameraLauncher.launch(uri) }
499+ .onFailure { pendingCaptureUri = null; scope.launch { snackbar.showSnackbar(noCameraMsg) } }
500+ }
501+
502+ fun launchVoice() {
503+ val intent = Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH).apply {
504+ putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL, RecognizerIntent.LANGUAGE_MODEL_FREE_FORM)
505+ putExtra(RecognizerIntent.EXTRA_PROMPT, voicePrompt)
506+ }
507+ runCatching { voiceLauncher.launch(intent) }
508+ .onFailure { scope.launch { snackbar.showSnackbar(noVoiceMsg) } }
509+ }
510+
511+ // A freshly-created share link is copied to the clipboard so the user can paste it right away.
512+ LaunchedEffect(Unit) {
513+ vm.shareLinkEvents.collect { url ->
514+ copyToClipboard(shareContext, shareContext.getString(R.string.clip_label_share), url)
515+ snackbar.showSnackbar(linkCopiedMsg)
516+ }
517+ }
518+
519+ // Navigate to a session freshly branched from a message (branchFrom), once it's created.
520+ // Keyed on Unit (like the sibling one-shot collectors above): keying on the onOpenSession
521+ // lambda would cancel/restart this collector whenever the lambda's identity changes, risking
522+ // a dropped branch-navigation event in the gap.
523+ val branchedMsg = stringResource(R.string.branch_created)
524+ LaunchedEffect(Unit) {
525+ vm.branchEvents.collect { newId ->
526+ showToast(shareContext, branchedMsg)
527+ onOpenSession?.invoke(newId)
528+ }
529+ }
530+
531+ // Stage images shared into the app (via the system share sheet) as attachments.
532+ // Keyed on pendingSharedMedia (not Unit) so the effect re-fires when new media arrives
533+ // while this ChatScreen is already composed — which happens in two-pane mode, where the
534+ // detail ChatScreen is persistent (keyed on sessionId) and a LaunchedEffect(Unit) would
535+ // only fire on first composition. consumePendingSharedMedia() atomically drains the
536+ // pending list (compareAndSet to empty), so re-firing on the now-empty value is a no-op.
537+ val pendingSharedMedia by container.pendingSharedMedia.collectAsStateWithLifecycle()
538+ LaunchedEffect(pendingSharedMedia) {
539+ val shared = container.consumePendingSharedMedia()
540+ if (shared.isNotEmpty()) stageUris(shared.map { Uri.parse(it) })
541+ }
542+
543+ fun doSend() {
544+ if (vm.send(draft)) {
545+ // TextHandleMove (a light tick) is semantically right for a send commit;
546+ // LongPress is reserved for long-press/swipe gestures.
547+ haptics.performHapticFeedback(androidx.compose.ui.hapticfeedback.HapticFeedbackType.TextHandleMove)
548+ }
549+ }
550+
551+ BackHandler(enabled = running && !showModelPicker && !showAgentPicker && !showCommandPicker) { showExitConfirm = true }
552+
553+ Scaffold(
554+ // Hardware-keyboard shortcuts (tablets / DeX / Chromebooks): Ctrl+K opens the command
555+ // palette; Escape closes it, or stops a run. onPreviewKeyEvent on the Scaffold root sees
556+ // events before the focused text field, but only Ctrl+K / Escape are consumed so normal
557+ // typing (and the composer's own Enter-to-send handling) is untouched.
558+ modifier = Modifier.onPreviewKeyEvent { ev ->
559+ if (ev.type != KeyEventType.KeyDown) return@onPreviewKeyEvent false
560+ when {
561+ ev.isCtrlPressed && ev.key == Key.K -> { showPalette = true; true }
562+ // Ctrl+F opens in-conversation search (the standard find shortcut), focusing
563+ // the field so the user can type immediately.
564+ ev.isCtrlPressed && ev.key == Key.F -> { searchActive = true; true }
565+ ev.key == Key.Escape && showPalette -> { showPalette = false; true }
566+ ev.key == Key.Escape && searchActive -> { searchActive = false; chatSearch = ""; true }
567+ ev.key == Key.Escape && running && !showExitConfirm -> {
568+ vm.abort(); true
569+ }
570+ else -> false
571+ }
572+ },
573+ topBar = {
574+ TopAppBar(
575+ title = {
576+ val changeLabel = stringResource(R.string.change_model_agent)
577+ // The subtitle reads "model · agent", so tapping the title offers *both*
578+ // — a small menu picks which picker to open. Previously the tap went
579+ // straight to the model picker, leaving the agent changeable only via
580+ // the overflow menu despite the title implying otherwise.
581+ Box {
582+ Row(
583+ // mergeDescendants so TalkBack reads the title/subtitle Texts as one
584+ // node; the click label rides on `clickable` (onClickLabel) instead of
585+ // an explicit contentDescription, which would have SUPPRESSED the child
586+ // Texts and announced only "Change model and agent".
587+ modifier = Modifier
588+ .clickable(
589+ role = Role.Button,
590+ onClickLabel = changeLabel,
591+ ) { showTitleMenu = true }
592+ .semantics(mergeDescendants = true) {},
593+ verticalAlignment = Alignment.CenterVertically,
594+ ) {
595+ Column(modifier = Modifier.weight(1f, fill = false)) {
596+ // maxLines=1 + Ellipsis so a long session title can't wrap and
597+ // push the top bar to multiple lines, shifting the whole layout.
598+ Text(
599+ sessionTitle ?: sessionLabel,
600+ maxLines = 1,
601+ overflow = TextOverflow.Ellipsis,
602+ )
603+ Text(
604+ subtitle,
605+ style = MaterialTheme.typography.labelSmall,
606+ color = MaterialTheme.colorScheme.onSurfaceVariant,
607+ maxLines = 1,
608+ overflow = TextOverflow.Ellipsis,
609+ )
610+ }
611+ // Always show the affordance so the title reads as tappable even when
612+ // the model catalog failed to load (models empty). Without it the title
613+ // is indistinguishable from plain text and the pickers are effectively
614+ // undiscoverable — and the dropdown items already disable themselves
615+ // while a catalog is loading or unavailable.
616+ Icon(
617+ Icons.Filled.KeyboardArrowDown,
618+ contentDescription = null,
619+ tint = MaterialTheme.colorScheme.onSurfaceVariant,
620+ modifier = Modifier.size(20.dp),
621+ )
622+ }
623+ DropdownMenu(expanded = showTitleMenu, onDismissRequest = { showTitleMenu = false }) {
624+ DropdownMenuItem(
625+ text = { Text(stringResource(R.string.palette_switch_model)) },
626+ enabled = !modelsLoading || models.isNotEmpty(),
627+ onClick = { showTitleMenu = false; showModelPicker = true },
628+ )
629+ DropdownMenuItem(
630+ text = { Text(stringResource(R.string.palette_choose_agent)) },
631+ enabled = !agentsLoading || agents.isNotEmpty(),
632+ onClick = { showTitleMenu = false; showAgentPicker = true },
633+ )
634+ }
635+ }
636+ },
637+ navigationIcon = {
638+ IconButton(onClick = {
639+ if (running) showExitConfirm = true else onBack()
640+ }) {
641+ Icon(Icons.AutoMirrored.Filled.ArrowBack, contentDescription = stringResource(R.string.back))
642+ }
643+ },
644+ actions = {
645+ // At-a-glance run status in the top bar. When the user is scrolled
646+ // up (jump-to-latest FAB visible), the input-bar Stop button and the
647+ // trailing "working…" row are off-screen, so a top-bar spinner is the
648+ // only signal the agent is still working.
649+ if (running) {
650+ val workingLabel = stringResource(R.string.working)
651+ CircularProgressIndicator(
652+ Modifier.size(18.dp).semantics { contentDescription = workingLabel },
653+ strokeWidth = 2.dp,
654+ )
655+ }
656+ // Manual refresh: forces an SSE reconnect, which re-seeds messages
657+ // from REST. A recovery path when the stream silently drops and the
658+ // auto-reconnect re-seed is slow or fails. Shows a brief spinner as
659+ // immediate tap feedback — the SSE reconnect may not visibly change
660+ // the connection state when already Connected, so without it the tap
661+ // appears to do nothing. Disabled while a run is active: a mid-run
662+ // refresh forces a reconnect that can interrupt the streaming reply,
663+ // and the working spinner already signals "wait" — the recovery path
664+ // is only needed when nothing is actively streaming.
665+ val refreshLabel = stringResource(R.string.refresh)
666+ IconButton(
667+ onClick = { vm.refreshMessages() },
668+ enabled = activeConnection != null && !refreshing && !running,
669+ ) {
670+ if (refreshing) {
671+ CircularProgressIndicator(
672+ Modifier.size(18.dp).semantics { contentDescription = refreshLabel },
673+ strokeWidth = 2.dp,
674+ )
675+ } else {
676+ Icon(Icons.Filled.Refresh, contentDescription = refreshLabel)
677+ }
678+ }
679+ // Overflow menu consolidates the less-frequent actions (share,
680+ // commands, agent, model, rename, delete) so the top bar stays
681+ // scannable on narrow phones — previously 5 icons crowded the bar
682+ // alongside the back button and tappable title. Catalog-loading
683+ // spinners stay inline (next to the overflow) so a load state is
684+ // visible without opening the menu.
685+ val moreLabel = stringResource(R.string.more)
686+ val loadingLabel = stringResource(R.string.loading)
687+ val shareLabel = stringResource(R.string.share_conversation)
688+ val copyAsMarkdownLabel = stringResource(R.string.copy_as_markdown)
689+ val shareAsJsonLabel = stringResource(R.string.share_as_json)
690+ val copyAsJsonLabel = stringResource(R.string.copy_as_json)
691+ val commandsLabel = stringResource(R.string.commands)
692+ val renameLabel = stringResource(R.string.rename_session_chat)
693+ val deleteLabel = stringResource(R.string.delete_session_chat)
694+ val createShareLabel = stringResource(R.string.create_share_link)
695+ val copyShareLabel = stringResource(R.string.copy_share_link)
696+ val stopShareLabel = stringResource(R.string.stop_sharing)
697+ val summarizeLabel = stringResource(R.string.summarize_conversation)
698+ val initLabel = stringResource(R.string.generate_agents_md)
699+ val shellLabel = stringResource(R.string.run_shell_command)
700+ Box {
701+ IconButton(onClick = { showOverflowMenu = true }) {
702+ Icon(Icons.Filled.MoreVert, contentDescription = moreLabel)
703+ }
704+ DropdownMenu(
705+ expanded = showOverflowMenu,
706+ onDismissRequest = { showOverflowMenu = false },
707+ ) {
708+ DropdownMenuItem(
709+ text = { Text(shareLabel) },
710+ enabled = hasMessages,
711+ onClick = {
712+ showOverflowMenu = false
713+ scope.launch {
714+ val md = withContext(Dispatchers.Default) {
715+ buildConversationMarkdown(vm.messages.value, sessionTitle)
716+ }
717+ val send = android.content.Intent(android.content.Intent.ACTION_SEND).apply {
718+ type = "text/markdown"
719+ putExtra(android.content.Intent.EXTRA_SUBJECT, sessionTitle ?: defaultShareSubject)
720+ putExtra(android.content.Intent.EXTRA_TEXT, md)
721+ }
722+ runCatchingCancellable { shareContext.startActivity(android.content.Intent.createChooser(send, shareLabel)) }
723+ .onFailure { showToast(shareContext, shareContext.getString(R.string.no_share_app)) }
724+ }
725+ },
726+ )
727+ // Copy the whole conversation as Markdown to the clipboard, so a
728+ // user can paste into another app without the share-sheet round-trip.
729+ DropdownMenuItem(
730+ text = { Text(copyAsMarkdownLabel) },
731+ enabled = hasMessages,
732+ onClick = {
733+ showOverflowMenu = false
734+ scope.launch {
735+ val md = withContext(Dispatchers.Default) {
736+ buildConversationMarkdown(vm.messages.value, sessionTitle)
737+ }
738+ copyToClipboard(shareContext, shareContext.getString(R.string.clip_label_message), md)
739+ }
740+ },
741+ )
742+ // Lossless JSON share: the full List<MessageWithParts> serialized with
743+ // the shared OpencodeJson, so tool outputs, file sources, and reasoning
744+ // survive verbatim (the Markdown export truncates/summarizes them).
745+ DropdownMenuItem(
746+ text = { Text(shareAsJsonLabel) },
747+ enabled = hasMessages,
748+ onClick = {
749+ showOverflowMenu = false
750+ scope.launch {
751+ val json = withContext(Dispatchers.Default) {
752+ buildConversationJson(vm.messages.value)
753+ }
754+ val send = android.content.Intent(android.content.Intent.ACTION_SEND).apply {
755+ type = "application/json"
756+ putExtra(android.content.Intent.EXTRA_SUBJECT, sessionTitle ?: defaultShareSubject)
757+ putExtra(android.content.Intent.EXTRA_TEXT, json)
758+ }
759+ runCatchingCancellable { shareContext.startActivity(android.content.Intent.createChooser(send, shareAsJsonLabel)) }
760+ .onFailure { showToast(shareContext, shareContext.getString(R.string.no_share_app)) }
761+ }
762+ },
763+ )
764+ DropdownMenuItem(
765+ text = { Text(copyAsJsonLabel) },
766+ enabled = hasMessages,
767+ onClick = {
768+ showOverflowMenu = false
769+ scope.launch {
770+ val json = withContext(Dispatchers.Default) {
771+ buildConversationJson(vm.messages.value)
772+ }
773+ copyToClipboard(shareContext, shareContext.getString(R.string.clip_label_message), json)
774+ }
775+ },
776+ )
777+ DropdownMenuItem(
778+ text = { Text(commandsLabel) },
779+ enabled = !commandsLoading || commands.isNotEmpty(),
780+ onClick = { showOverflowMenu = false; showCommandPicker = true },
781+ )
782+ DropdownMenuItem(
783+ text = { Text(stringResource(R.string.keyboard_shortcuts)) },
784+ onClick = { showOverflowMenu = false; showShortcutsDialog = true },
785+ )
786+ DropdownMenuItem(
787+ text = { Text(stringResource(R.string.find_in_conversation)) },
788+ onClick = {
789+ showOverflowMenu = false
790+ searchActive = true
791+ // Focus is requested by the LaunchedEffect(searchActive)
792+ // below, which waits for the search field to be composed
793+ // before requesting focus (calling requestFocus here would
794+ // target a field that isn't in the composition yet).
795+ },
796+ )
797+ androidx.compose.material3.HorizontalDivider()
798+ // Session sharing: create a public link, copy an existing one, or revoke it.
799+ if (shareUrl == null) {
800+ DropdownMenuItem(
801+ text = { Text(createShareLabel) },
802+ enabled = hasMessages,
803+ onClick = { showOverflowMenu = false; vm.shareSession() },
804+ )
805+ } else {
806+ DropdownMenuItem(
807+ text = { Text(copyShareLabel) },
808+ onClick = {
809+ showOverflowMenu = false
810+ shareUrl?.let {
811+ copyToClipboard(shareContext, shareContext.getString(R.string.clip_label_share), it)
812+ scope.launch { snackbar.showSnackbar(linkCopiedMsg) }
813+ }
814+ },
815+ )
816+ DropdownMenuItem(
817+ text = { Text(stopShareLabel) },
818+ onClick = { showOverflowMenu = false; vm.unshareSession() },
819+ )
820+ }
821+ DropdownMenuItem(
822+ text = { Text(summarizeLabel) },
823+ enabled = hasMessages && !running,
824+ onClick = { showOverflowMenu = false; showSummarizeConfirm = true },
825+ )
826+ DropdownMenuItem(
827+ text = { Text(initLabel) },
828+ enabled = !running,
829+ onClick = { showOverflowMenu = false; showInitConfirm = true },
830+ )
831+ DropdownMenuItem(
832+ text = { Text(shellLabel) },
833+ enabled = !running,
834+ onClick = { showOverflowMenu = false; showShellDialog = true },
835+ )
836+ androidx.compose.material3.HorizontalDivider()
837+ DropdownMenuItem(
838+ text = { Text(renameLabel) },
839+ onClick = { showOverflowMenu = false; showRenameDialog = true },
840+ )
841+ DropdownMenuItem(
842+ text = { Text(deleteLabel, color = MaterialTheme.colorScheme.error) },
843+ onClick = { showOverflowMenu = false; showDeleteDialog = true },
844+ )
845+ }
846+ // While a catalog is initially loading (empty list + loading flag),
847+ // show a tiny inline spinner beside the overflow so the user can see
848+ // a load is in progress without opening the menu. Once loaded the
849+ // spinner disappears; the menu items are always enabled (tapping a
850+ // picker with no items shows the "no models/agents/commands" state).
851+ val catalogLoading = (commandsLoading && commands.isEmpty()) ||
852+ (agentsLoading && agents.isEmpty()) ||
853+ (modelsLoading && models.isEmpty())
854+ if (catalogLoading) {
855+ CircularProgressIndicator(
856+ Modifier
857+ .align(Alignment.TopEnd)
858+ .size(10.dp)
859+ .semantics { contentDescription = loadingLabel },
860+ strokeWidth = 1.dp,
861+ )
862+ }
863+ }
864+ },
865+ )
866+ },
867+ snackbarHost = { SnackbarHost(snackbar) },
868+ bottomBar = {
869+ val queuedFollowUp by vm.queuedFollowUp.collectAsStateWithLifecycle()
870+ val todoPlan by vm.todoPlan.collectAsStateWithLifecycle()
871+ val queuedOffline by vm.outbox.collectAsStateWithLifecycle()
872+ val outboxSending by container.outboxSending.collectAsStateWithLifecycle()
873+ Column {
874+ // Pinned above the composer so the agent's plan and progress stay visible
875+ // while scrolled up mid-run; renders nothing when there's no plan.
876+ TodoPlanBar(todoPlan)
877+ val bannerMotion = rememberVisibilityTransitions()
878+ AnimatedVisibility(
879+ visible = reverted,
880+ enter = bannerMotion.enter,
881+ exit = bannerMotion.exit,
882+ ) {
883+ RevertBanner(
884+ diff = revertDiff,
885+ isEditing = editing,
886+ onUndo = { vm.unrevert() },
887+ )
888+ }
889+ AnimatedVisibility(
890+ visible = queuedOffline.isNotEmpty(),
891+ enter = bannerMotion.enter,
892+ exit = bannerMotion.exit,
893+ ) {
894+ OutboxBanner(
895+ count = queuedOffline.size,
896+ sending = outboxSending,
897+ onFlush = { vm.flushQueued() },
898+ onDiscard = { vm.discardAllQueued() },
899+ )
900+ }
901+ AnimatedVisibility(
902+ visible = pendingQuote != null,
903+ enter = bannerMotion.enter,
904+ exit = bannerMotion.exit,
905+ ) {
906+ pendingQuote?.let { QuoteReplyBanner(it, onCancel = { vm.cancelQuoteReply() }) }
907+ }
908+ ChatInputBar(
909+ value = draft,
910+ onValueChange = vm::updateDraft,
911+ running = running,
912+ aborting = aborting,
913+ enabled = activeConnection != null,
914+ sendOnEnter = sendOnEnter,
915+ onSend = ::doSend,
916+ onAbort = { vm.abort() },
917+ queuedFollowUp = queuedFollowUp,
918+ onQueueFollowUp = vm::queueFollowUp,
919+ onCancelQueue = { vm.queueFollowUp("") },
920+ focusRequester = inputFocusRequester,
921+ attachments = attachments,
922+ staging = stagingCount > 0,
923+ stagingFileCount = stagingFileTotal,
924+ onRemoveAttachment = vm::removeAttachment,
925+ onPickPhoto = {
926+ photoPicker.launch(
927+ PickVisualMediaRequest(ActivityResultContracts.PickVisualMedia.ImageOnly),
928+ )
929+ },
930+ onPickFile = { filePicker.launch("*/*") },
931+ onCamera = { launchCamera() },
932+ onVoice = { launchVoice() },
933+ onPasteImage = { stageUris(it) },
934+ commands = commands,
935+ onRunCommand = { cmd ->
936+ vm.runCommand(cmd)
937+ // Clear the draft so the typed /prefix doesn't linger after the
938+ // command fires (the command picker confirmation, if any, is
939+ // handled inside runCommand).
940+ vm.updateDraft("")
941+ },
942+ )
943+ }
944+ },
945+ ) { padding ->
946+ // Collect messages inside the content lambda so streaming token updates
947+ // recompose only this subtree, not the top bar / input bar / 20+ other
948+ // state reads in the ChatScreen body.
949+ val messages by vm.messages.collectAsStateWithLifecycle()
950+ val optimisticStatuses by vm.optimisticStatuses.collectAsStateWithLifecycle()
951+ val listState = rememberLazyListState()
952+ val contentScope = rememberCoroutineScope()
953+ val timeTick = rememberRelativeTimeTick()
954+ // Dismiss the soft keyboard when the user scrolls the message list, a standard Android
955+ // chat affordance for reading while the IME is open. Watching isScrollInProgress via
956+ // snapshotFlow avoids wiring a nested scroll connection and fires on any scroll gesture.
957+ val keyboardController = androidx.compose.ui.platform.LocalSoftwareKeyboardController.current
958+ androidx.compose.runtime.LaunchedEffect(listState) {
959+ androidx.compose.runtime.snapshotFlow { listState.isScrollInProgress }
960+ .distinctUntilChanged()
961+ .collect { scrolling -> if (scrolling) keyboardController?.hide() }
962+ } // Group messages by day and interleave date separators so a long conversation
963+ // has visual "Today"/"Yesterday"/date breaks. Computed once per messages
964+ // emission (memoized) so a scroll-induced recomposition doesn't re-scan. Lives
965+ // outside the PullToRefreshBox so the auto-scroll effects below can reference
966+ // the same list the LazyColumn renders (separators shift the indices vs. the
967+ // raw messages list, so scroll targets must be in listItems space).
968+ val todayLabel = stringResource(R.string.today)
969+ val yesterdayLabel = stringResource(R.string.yesterday)
970+ // In-conversation search: when active, narrow to messages whose text contains the query.
971+ // Computed on the filtered set so day separators still align with the visible messages.
972+ // Debounced + off-main-thread so a keystroke-by-keystroke filter walk over a long
973+ // conversation (with many tool parts whose state stringification is non-trivial)
974+ // doesn't jank the UI. produceState yields the empty list immediately and publishes
975+ // the filtered result once the debounce settles.
976+ val searchQuery = chatSearch.trim()
977+ val searchMessages by produceState(
978+ initialValue = if (searchQuery.isEmpty()) messages else emptyList(),
979+ messages,
980+ searchQuery,
981+ ) {
982+ if (searchQuery.isEmpty()) {
983+ value = messages
984+ } else {
985+ // Debounce: wait for the user to stop typing before running the filter,
986+ // so each keystroke doesn't kick off a fresh scan.
987+ kotlinx.coroutines.delay(NetworkConfig.chatSearchDebounceMs)
988+ // Run the filter off the main thread — the walk stringifies tool state
989+ // and scans every part of every message, which is non-trivial work for a
990+ // long conversation.
991+ value = withContext(Dispatchers.Default) {
992+ messages.filter { m ->
993+ m.parts.any { p ->
994+ when (p) {
995+ is TextPart -> p.text.contains(searchQuery, ignoreCase = true)
996+ is ReasoningPart -> p.text.contains(searchQuery, ignoreCase = true)
997+ is ToolPart -> {
998+ // Match the tool name plus its running/completed/error text and the
999+ // stringified input, so searching for an error string or a file the
1000+ // tool touched actually finds the message it appeared in.
1001+ p.tool.contains(searchQuery, ignoreCase = true) ||
1002+ (p.state is ToolRunning && p.state.title?.contains(searchQuery, ignoreCase = true) == true) ||
1003+ (p.state is ToolCompleted && (p.state.title?.contains(searchQuery, ignoreCase = true) == true ||
1004+ p.state.output?.contains(searchQuery, ignoreCase = true) == true)) ||
1005+ (p.state is ToolError && p.state.error?.contains(searchQuery, ignoreCase = true) == true) ||
1006+ p.state.inputElement()?.toString()?.contains(searchQuery, ignoreCase = true) == true
1007+ }
1008+ is FilePart -> p.filename?.contains(searchQuery, ignoreCase = true) == true ||
1009+ p.sourcePath?.contains(searchQuery, ignoreCase = true) == true
1010+ else -> false
1011+ }
1012+ }
1013+ }
1014+ }
1015+ }
1016+ }
1017+ // Keep the focused-match index in range as the query (and thus the match set) changes.
1018+ // A new query resets to the first match; a shrunk set clamps to the last valid index.
1019+ LaunchedEffect(searchQuery, searchMessages.size) {
1020+ if (searchPos >= searchMessages.size) searchPos = 0
1021+ }
1022+ val listItems = remember(searchMessages, todayLabel, yesterdayLabel) {
1023+ buildMessageListItems(searchMessages, todayLabel, yesterdayLabel)
1024+ }
1025+ // listItems is a plain (non-snapshot) local, rebuilt each recomposition. The
1026+ // derivedStateOf and snapshotFlow lambdas below are created once (keyless
1027+ // remember / LaunchedEffect(Unit)); reading `listItems` directly inside them
1028+ // would capture the first composition's list — which is empty, since `messages`
1029+ // starts empty — freezing it forever. That pinned isPinnedToBottom at true and
1030+ // AutoScrollSignal.size at 0, breaking streaming auto-scroll and the
1031+ // jump-to-latest FAB. rememberUpdatedState hands those lambdas a stable State
1032+ // whose value tracks the latest list.
1033+ val currentListItems by rememberUpdatedState(listItems)
1034+
1035+ // New-content signal for the jump-to-latest FAB: counts how many new items arrived
1036+ // while the user was scrolled away from the bottom, cleared once they return. A count
1037+ // (vs. a bare dot) tells the user how much they missed at a glance.
1038+ var newContentCount by remember { mutableIntStateOf(0) }
1039+
1040+ val isPinnedToBottom by remember {
1041+ derivedStateOf {
1042+ val lastVisible = listState.layoutInfo.visibleItemsInfo.lastOrNull()?.index ?: -1
1043+ // When a run is active, the LazyColumn has one trailing "__typing"
1044+ // item after the last list item. Account for it so "pinned to bottom"
1045+ // includes the working indicator — otherwise the pin check targets
1046+ // listItems.lastIndex, the typing row sits just below the viewport,
1047+ // and the user never sees the progress indicator even when pinned.
1048+ val items = currentListItems
1049+ val effectiveLast = if (running) items.size else items.lastIndex
1050+ lastVisible >= effectiveLast || items.isEmpty()
1051+ }
1052+ }
1053+
1054+ // Jump to the newest message once, when the conversation first loads. Guarded by a
1055+ // saveable one-shot flag so it doesn't re-fire on recomposition after a config change
1056+ // (rotation) — rememberLazyListState restores the user's scroll offset, and an
1057+ // unconditional scrollToItem here would clobber it, snapping them back to the bottom.
1058+ var didInitialScroll by rememberSaveable { mutableStateOf(false) }
1059+ LaunchedEffect(listItems.isNotEmpty()) {
1060+ if (listItems.isNotEmpty() && !didInitialScroll) {
1061+ // When a run is active the LazyColumn has a trailing "__typing" row at
1062+ // listItems.size; target it (not listItems.lastIndex) so deep-linking into a
1063+ // running session lands truly pinned to bottom and streaming auto-scroll engages.
1064+ listState.scrollToItem(if (running) listItems.size else listItems.lastIndex)
1065+ didInitialScroll = true
1066+ }
1067+ }
1068+
1069+ // When a run starts, the LazyColumn gains a trailing "__typing" row, so
1070+ // effectiveLast jumps from listItems.lastIndex to listItems.size and the
1071+ // isPinnedToBottom check flips to false the instant you send — freezing
1072+ // auto-scroll. If the user was pinned to the last item just before the run
1073+ // began, bring the typing row into view so the pin (and streaming follow) is
1074+ // preserved. Guard on the raw last-visible index (isPinnedToBottom has already
1075+ // recomputed to false by now) so we don't scroll when the user had scrolled up.
1076+ LaunchedEffect(running) {
1077+ if (running && listItems.isNotEmpty()) {
1078+ val lastVisible = listState.layoutInfo.visibleItemsInfo.lastOrNull()?.index ?: -1
1079+ if (lastVisible >= listItems.lastIndex) {
1080+ runCatchingCancellable { listState.animateScrollToItem(listItems.size) }
1081+ }
1082+ }
1083+ }
1084+
1085+ // Scroll the focused search match into view whenever the user steps through results with
1086+ // the up/down arrows. Resolves the filtered message to its slot in listItems (which
1087+ // includes date separators) and animates there.
1088+ LaunchedEffect(searchPos, searchQuery, listItems) {
1089+ if (!searchActive || searchQuery.isEmpty()) return@LaunchedEffect
1090+ val target = searchMessages.getOrNull(searchPos) ?: return@LaunchedEffect
1091+ val index = listItems.indexOfFirst {
1092+ it is MessageListItem.Message && it.message.info.id == target.info.id
1093+ }
1094+ if (index >= 0) runCatchingCancellable { listState.animateScrollToItem(index) }
1095+ }
1096+
1097+ // Global-search deep link: scroll to and briefly highlight the matched message. The
1098+ // focus id is threaded through the chat route from GlobalSearchScreen. The highlight
1099+ // clears itself after a short delay so the user can re-read the surrounding context
1100+ // without a persistent marker. Runs once per focusMessageId (cleared on consume).
1101+ var focusedMessageId by remember(focusMessageId) { mutableStateOf(focusMessageId) }
1102+ LaunchedEffect(focusedMessageId, listItems) {
1103+ val focus = focusedMessageId ?: return@LaunchedEffect
1104+ if (listItems.isEmpty()) return@LaunchedEffect
1105+ val index = listItems.indexOfFirst {
1106+ it is MessageListItem.Message && it.message.info.id == focus
1107+ }
1108+ if (index < 0) return@LaunchedEffect
1109+ runCatchingCancellable { listState.animateScrollToItem(index) }
1110+ kotlinx.coroutines.delay(2500)
1111+ focusedMessageId = null
1112+ }
1113+
1114+ // Scroll to bottom when the IME opens and the user was already pinned to bottom, so the
1115+ // latest reply stays visible as the composer rises. Without this the IME can obscure the
1116+ // last message even though the user was reading it a moment ago. WindowInsets.ime is a
1117+ // @Composable property, so we read it inside a snapshotFlow registered in the composable
1118+ // scope; the flow re-emits whenever the IME inset changes (open/close transitions).
1119+ val density = androidx.compose.ui.platform.LocalDensity.current
1120+ var wasImeOpen by remember { mutableStateOf(false) }
1121+ val imeBottomPx = WindowInsets.ime.getBottom(density)
1122+ androidx.compose.runtime.LaunchedEffect(imeBottomPx, listItems.isNotEmpty(), isPinnedToBottom) {
1123+ if (listItems.isEmpty()) return@LaunchedEffect
1124+ val imeOpen = imeBottomPx > 0
1125+ // Scroll to bottom only on the open transition (not close) and only when the user
1126+ // was already pinned to bottom — otherwise we'd yank them out of a mid-history read.
1127+ val shouldScroll = imeOpen && !wasImeOpen && isPinnedToBottom
1128+ if (shouldScroll) {
1129+ runCatchingCancellable {
1130+ listState.animateScrollToItem(if (running) listItems.size else listItems.lastIndex)
1131+ }
1132+ }
1133+ wasImeOpen = imeOpen
1134+ }
1135+
1136+ LaunchedEffect(Unit) {
1137+ var prevSize = 0
1138+ var prevLen = 0
1139+ snapshotFlow {
1140+ // Track list size + the streaming length of the last part so we auto-scroll
1141+ // as content arrives, plus the pinned flag. A small data class with primitive
1142+ // fields avoids the per-frame boxing that Triple<Int,Int,Boolean> pays
1143+ // (snapshotFlow re-evaluates this lambda every snapshot), and reading only the
1144+ // last part's length is O(1) vs. a sumOf over every part. Covering reasoning
1145+ // and tool output — not just TextPart — keeps a pinned view following a long
1146+ // reasoning/tool block while it streams (previously it stalled at 0).
1147+ val lastLen = streamingContentLength(messages.lastOrNull()?.parts?.lastOrNull())
1148+ AutoScrollSignal(currentListItems.size, lastLen, isPinnedToBottom)
1149+ }.collect { signal ->
1150+ if (signal.pinned) {
1151+ // Back at the bottom: clear the new-content badge.
1152+ newContentCount = 0
1153+ if (signal.size > 0) {
1154+ // Scroll to the effective last index, including the trailing
1155+ // "__typing" row when a run is active so the working indicator
1156+ // is brought into view (not just the last message).
1157+ val items = currentListItems
1158+ val target = if (running) items.size else items.lastIndex
1159+ listState.scrollToItem(target)
1160+ }
1161+ } else if (signal.size > prevSize || signal.lastTextLength > prevLen) {
1162+ // Content arrived while scrolled up — increment the jump-to-latest badge.
1163+ // Only count whole new items (not per-token growth) so the number reflects
1164+ // new messages, not a token count.
1165+ if (signal.size > prevSize) newContentCount += signal.size - prevSize
1166+ else if (newContentCount == 0) newContentCount = 1
1167+ }
1168+ prevSize = signal.size
1169+ prevLen = signal.lastTextLength
1170+ }
1171+ }
1172+
1173+ CompositionLocalProvider(LocalRelativeTimeTick provides timeTick) {
1174+ // The bottomBar (ChatInputBar) already has imePadding, and the Scaffold's
1175+ // content padding accounts for the bottomBar's raised height, so the message
1176+ // list is already above the keyboard. Adding imePadding here would double-apply
1177+ // the IME inset and push messages too far up.
1178+ //
1179+ // BoxWithConstraints so the FABs and search bar can align to the capped (800dp)
1180+ // message list on wide screens instead of floating at the screen edges — on a
1181+ // tablet the list is a centered column, so edge-aligned FABs are visually detached.
1182+ // The horizontal margin below is applied to the FAB/search containers so they
1183+ // track the list's left/right edges.
1184+ androidx.compose.foundation.layout.BoxWithConstraints(
1185+ modifier = Modifier.fillMaxSize().padding(padding),
1186+ ) {
1187+ val screenMaxWidth = maxWidth
1188+ val listMaxWidth = NetworkConfig.chatContentMaxWidthDp.dp
1189+ // Horizontal margin between the capped list's edge and the screen edge (0 on
1190+ // screens narrower than the cap). Applied as start/end padding so the FABs and
1191+ // search bar sit at the list's edges, not the screen's.
1192+ val sideMargin = ((screenMaxWidth - listMaxWidth) / 2).coerceAtLeast(0.dp)
1193+ if (activeConnection == null) {
1194+ Column(
1195+ modifier = Modifier.align(Alignment.Center).padding(24.dp),
1196+ horizontalAlignment = Alignment.CenterHorizontally,
1197+ ) {
1198+ Text(
1199+ stringResource(R.string.not_connected),
1200+ color = MaterialTheme.colorScheme.error,
1201+ )
1202+ Spacer(Modifier.size(12.dp))
1203+ Button(onClick = { vm.reconnect() }, enabled = !reconnecting) {
1204+ if (reconnecting) {
1205+ CircularProgressIndicator(
1206+ Modifier.size(20.dp),
1207+ color = MaterialTheme.colorScheme.onPrimary,
1208+ strokeWidth = 2.dp,
1209+ )
1210+ } else {
1211+ Text(stringResource(R.string.reconnect))
1212+ }
1213+ }
1214+ }
1215+ } else {
1216+ val bannerVisible = !isOnline || connectionState != EventStreamClient.ConnectionState.Connected
1217+ // Measure the banner's actual height instead of hardcoding 44dp. At large
1218+ // accessibility font scales the banner's labelMedium text + spinner + Retry
1219+ // button exceed 44dp, so a fixed inset lets the first message hide behind it
1220+ // (the same hazard FileViewScreen's overlay calls out). onSizeChanged only
1221+ // fires while the banner is composed (visible), so gate the inset on
1222+ // bannerVisible and fall back to 44dp until the first measurement arrives.
1223+ var bannerHeightPx by remember { mutableIntStateOf(0) }
1224+ // Track the search bar height so the list's top padding can grow when search
1225+ // is active — otherwise a scrolled-to match lands at index 0, hidden behind
1226+ // the floating search bar (the "scroll-under-the-search-bar" bug).
1227+ var searchbarHeightPx by remember { mutableIntStateOf(0) }
1228+ val density = LocalDensity.current
1229+ val topPad = if (bannerVisible) {
1230+ if (bannerHeightPx > 0) {
1231+ with(density) { bannerHeightPx.toDp() } + 4.dp
1232+ } else {
1233+ 44.dp
1234+ }
1235+ } else {
1236+ 16.dp
1237+ } + if (searchActive && searchbarHeightPx > 0) {
1238+ with(density) { searchbarHeightPx.toDp() } + 4.dp
1239+ } else {
1240+ 0.dp
1241+ }
1242+ ConnectionBanner(
1243+ state = connectionState,
1244+ modifier = Modifier.align(Alignment.TopCenter).onSizeChanged { bannerHeightPx = it.height },
1245+ isOnline = isOnline,
1246+ // On a hard endpoint failure, retry by forcing an SSE reconnect (which
1247+ // re-seeds from REST). refreshMessages is the right recovery path
1248+ // when the connection is present but the stream died; reconnect()
1249+ // is the path when the whole connection is gone (handled by the
1250+ // separate "Not connected" state below).
1251+ onRetry = { vm.refreshMessages() },
1252+ // On an auth failure (401/403), retrying with the same bad credentials
1253+ // is futile — offer a one-tap path to edit the active profile's
1254+ // credentials instead of making the user hunt for the server list.
1255+ onEditCredentials = {
1256+ val profileId = activeConnection?.profile?.id
1257+ if (profileId != null) onEditProfile?.invoke(profileId)
1258+ },
1259+ reconnectAttempts = reconnectAttempts,
1260+ )
1261+ // Persistent inline error banner for a mid-conversation load failure.
1262+ // Unlike the one-shot snackbar (which fires once per streak then goes
1263+ // silent), this stays visible until the stream recovers, so a persistent
1264+ // outage doesn't read as "everything is fine" after the snackbar dismisses.
1265+ // Anchored at the top, below the connection banner, so it doesn't overlap
1266+ // the message list.
1267+ if (loadErrorInline && hasMessages) {
1268+ Surface(
1269+ color = MaterialTheme.colorScheme.errorContainer,
1270+ shape = MaterialTheme.shapes.small,
1271+ modifier = Modifier
1272+ .align(Alignment.TopCenter)
1273+ .padding(top = if (bannerVisible) topPad else 8.dp)
1274+ .padding(horizontal = 16.dp)
1275+ .semantics { liveRegion = LiveRegionMode.Polite },
1276+ ) {
1277+ Row(
1278+ modifier = Modifier.padding(horizontal = 12.dp, vertical = 8.dp),
1279+ verticalAlignment = Alignment.CenterVertically,
1280+ horizontalArrangement = Arrangement.spacedBy(8.dp),
1281+ ) {
1282+ Icon(
1283+ Icons.Filled.ErrorOutline,
1284+ contentDescription = null,
1285+ modifier = Modifier.size(16.dp),
1286+ tint = MaterialTheme.colorScheme.onErrorContainer,
1287+ )
1288+ Text(
1289+ stringResource(R.string.load_error_persistent),
1290+ style = MaterialTheme.typography.labelMedium,
1291+ color = MaterialTheme.colorScheme.onErrorContainer,
1292+ modifier = Modifier.weight(1f),
1293+ )
1294+ TextButton(
1295+ onClick = { vm.refreshMessages() },
1296+ contentPadding = androidx.compose.foundation.layout.PaddingValues(horizontal = 8.dp),
1297+ ) {
1298+ Text(stringResource(R.string.retry))
1299+ }
1300+ }
1301+ }
1302+ }
1303+ // Pull-to-refresh wraps ALL content states (loading, error, empty, list) so
1304+ // recovery is a swipe away everywhere — not just when the message list is
1305+ // populated. Previously PTR was only around the populated list, leaving the
1306+ // error/loading states reachable only via a button tap.
1307+ PullToRefreshBox(
1308+ isRefreshing = refreshing,
1309+ // Suppress the refresh action while a run is active: a mid-stream
1310+ // refresh forces an SSE reconnect that can interrupt the actively
1311+ // streaming reply (matching the top-bar refresh button, which is
1312+ // also disabled while running). The pull gesture still responds, but
1313+ // the release no-ops instead of triggering a disruptive re-seed.
1314+ onRefresh = { if (!running) vm.refreshMessages() },
1315+ // Cap width and center on large screens for readability — full-width
1316+ // bubbles stretch edge-to-edge on tablets, hurting line-length comfort.
1317+ modifier = Modifier.fillMaxSize().wrapContentWidth(Alignment.CenterHorizontally)
1318+ .widthIn(max = NetworkConfig.chatContentMaxWidthDp.dp),
1319+ ) {
1320+ // Reserve top space when the banner is visible so it doesn't overlap the
1321+ // first message / state content. (topPad computed above.)
1322+ if (loading && messages.isEmpty()) {
1323+ // Skeleton bubbles pre-structure the layout so the perceived load is faster
1324+ // than a bare centered spinner and the first real messages pop into an
1325+ // already-shaped list instead of a blank-then-pop.
1326+ ChatSkeleton(topPad = topPad)
1327+ } else if (loadError && messages.isEmpty()) {
1328+ // A failed load with nothing to show. Distinct from the empty
1329+ // conversation state below — the conversation isn't empty, it
1330+ // failed to load, and offering "Start a conversation" here is
1331+ // misleading. Offer a Retry instead, mirroring SessionListScreen.
1332+ Column(
1333+ modifier = Modifier.align(Alignment.Center).padding(top = topPad).padding(24.dp),
1334+ horizontalAlignment = Alignment.CenterHorizontally,
1335+ ) {
1336+ Text(
1337+ stringResource(R.string.load_messages_failed),
1338+ color = MaterialTheme.colorScheme.error,
1339+ )
1340+ Spacer(Modifier.size(12.dp))
1341+ Button(onClick = { vm.refreshMessages() }) {
1342+ Text(stringResource(R.string.retry))
1343+ }
1344+ // When the VM's retryWhen loop is actively retrying (loading is true
1345+ // on top of the error state), surface a small "retrying…" indicator so
1346+ // the user knows the system is working — without it, the static error
1347+ // + Retry button reads as "broken, tap to fix", and the user may not
1348+ // realize an automatic retry is already in progress.
1349+ if (loading) {
1350+ Spacer(Modifier.size(12.dp))
1351+ val retryingLabel = stringResource(R.string.retrying_ellipsis)
1352+ Row(verticalAlignment = Alignment.CenterVertically) {
1353+ CircularProgressIndicator(
1354+ Modifier.size(14.dp),
1355+ strokeWidth = 2.dp,
1356+ )
1357+ Text(
1358+ retryingLabel,
1359+ style = MaterialTheme.typography.labelSmall,
1360+ color = MaterialTheme.colorScheme.onSurfaceVariant,
1361+ modifier = Modifier.padding(start = 6.dp),
1362+ )
1363+ }
1364+ }
1365+ }
1366+ } else if (messages.isEmpty() && running) {
1367+ // A run just started but no parts have arrived yet — the empty list with
1368+ // only the trailing "working…" row looks broken. Reuse the skeleton bubbles
1369+ // from the initial-load branch so the perceived start latency is lower and
1370+ // the first real assistant part pops into an already-shaped list.
1371+ ChatSkeleton(topPad = topPad)
1372+ } else if (messages.isEmpty()) {
1373+ EmptyConversation(
1374+ onSuggestion = {
1375+ vm.updateDraft(it)
1376+ // Focus the input so the user can edit the suggestion before
1377+ // sending, instead of having to manually tap the field.
1378+ runCatching { inputFocusRequester.requestFocus() }
1379+ },
1380+ modifier = Modifier.align(Alignment.Center).padding(top = topPad),
1381+ )
1382+ } else {
1383+ val lastMessageId = messages.lastOrNull()?.info?.id
1384+ // Text-to-speech for reading assistant replies aloud; shuts down when the
1385+ // message list leaves composition.
1386+ val tts = rememberTtsController()
1387+ val speakingMessageId by tts.speakingId
1388+ val ttsState by tts.state
1389+ // Provide the in-conversation search query to the markdown renderer so matching
1390+ // text spans are highlighted in-place (in addition to the focused-row highlight
1391+ // above). Scoped to the list so cleared search stops highlighting immediately.
1392+ val activeSearchQuery = searchQuery.takeIf { searchActive && it.isNotEmpty() }
1393+ CompositionLocalProvider(LocalSearchHighlight provides activeSearchQuery) {
1394+ LazyColumn(
1395+ state = listState,
1396+ modifier = Modifier.fillMaxSize(),
1397+ // Extra bottom padding reserves room for the jump-to-latest FAB so it
1398+ // never floats over the last message. Top padding grows when the
1399+ // connection banner is visible so it doesn't overlap the first message.
1400+ contentPadding = PaddingValues(
1401+ start = 16.dp,
1402+ top = topPad,
1403+ end = 16.dp,
1404+ bottom = 16.dp + NetworkConfig.chatListFabInsetDp.dp,
1405+ ),
1406+ // Compact spacing (8dp) vs the default 16dp — a power-user toggle to fit
1407+ // more conversation on screen without scrolling as much.
1408+ verticalArrangement = Arrangement.spacedBy(if (compactSpacing) 8.dp else 16.dp),
1409+ ) {
1410+ items(
1411+ items = listItems,
1412+ key = { it.key },
1413+ contentType = { it.contentType },
1414+ ) { item ->
1415+ // When in-conversation search is stepping through matches, highlight the
1416+ // focused one's row so the user can spot it at a glance among the filtered
1417+ // results (full in-text term highlighting would require threading the query
1418+ // through the markdown renderer; the row highlight + scroll-to-match covers
1419+ // the navigation use case desktop chat apps solve with next/prev).
1420+ val focusedMatchId = if (searchActive && searchQuery.isNotEmpty()) {
1421+ searchMessages.getOrNull(searchPos)?.info?.id
1422+ } else null
1423+ val isFocusedMatch = focusedMatchId != null &&
1424+ item is MessageListItem.Message &&
1425+ item.message.info.id == focusedMatchId
1426+ // Default placement animation so inserted/moved rows glide in. Skipped
1427+ // entirely under reduced motion so a streaming message growing in place
1428+ // doesn't animate on every token (and respects the a11y preference).
1429+ Box(
1430+ Modifier
1431+ .then(reducedMotionAnimateItem())
1432+ .then(
1433+ if (isFocusedMatch) {
1434+ Modifier.background(
1435+ MaterialTheme.colorScheme.secondaryContainer,
1436+ MaterialTheme.shapes.medium,
1437+ )
1438+ } else {
1439+ Modifier
1440+ },
1441+ ),
1442+ ) {
1443+ when (item) {
1444+ is MessageListItem.Separator -> DateSeparator(item.label)
1445+ is MessageListItem.Message -> {
1446+ val message = item.message
1447+ // Only the last (streaming) message needs isRunning — it drives the
1448+ // reasoning-block spinner. Passing the live flag to every bubble
1449+ // makes all visible messages recompose whenever a run starts or stops.
1450+ val modelLabel = remember(message.info, models) {
1451+ (message.info as? soy.iko.opencode.data.model.AssistantMessage)
1452+ ?.let { resolveModelLabel(it, models) }
1453+ }
1454+ val agentLabel = remember(message.parts) {
1455+ message.parts
1456+ .filterIsInstance<soy.iko.opencode.data.model.AgentPart>()
1457+ .firstOrNull { it.name.isNotBlank() }?.name
1458+ }
1459+ // Text used to drive swipe-to-reply (and pre-fill the quote). Empty for
1460+ // image/code-only messages, which then opt out of the swipe gesture.
1461+ val quoteText = remember(message.parts) {
1462+ message.parts
1463+ .filterIsInstance<TextPart>()
1464+ .joinToString("\n\n") { it.text }
1465+ .trim()
1466+ .takeIf { it.isNotEmpty() }
1467+ }
1468+ // Swipe-start-to-end reveals a reply affordance and triggers quote-reply,
1469+ // snapping back (the message isn't dismissed — the quote fills the composer).
1470+ // Enabled for non-text messages too (image/tool-only), but the confirm
1471+ // callback gives a haptic without triggering reply — so the user gets a
1472+ // perceptible "can't quote this" signal instead of a silently dead gesture.
1473+ val cantQuoteMsg = stringResource(R.string.cannot_quote_this)
1474+ val undoLabel = stringResource(R.string.undo)
1475+ val quoteReplyLabel = stringResource(R.string.quote_reply_banner)
1476+ val swipeState = rememberSwipeToDismissBoxState(
1477+ confirmValueChange = { value ->
1478+ val replyValue = if (layoutDirection == LayoutDirection.Rtl) {
1479+ SwipeToDismissBoxValue.EndToStart
1480+ } else {
1481+ SwipeToDismissBoxValue.StartToEnd
1482+ }
1483+ if (value == replyValue) {
1484+ if (quoteText != null) {
1485+ haptics.performHapticFeedback(androidx.compose.ui.hapticfeedback.HapticFeedbackType.TextHandleMove)
1486+ vm.quoteReply(quoteText)
1487+ runCatching { inputFocusRequester.requestFocus() }
1488+ // Offer a quick Undo for an accidental swipe,
1489+ // mirroring the app's undo-everywhere ethos so
1490+ // the user needn't reach for the banner's X.
1491+ scope.launch {
1492+ val res = snackbar.showSnackbar(
1493+ message = quoteReplyLabel,
1494+ actionLabel = undoLabel,
1495+ )
1496+ if (res == androidx.compose.material3.SnackbarResult.ActionPerformed) {
1497+ vm.cancelQuoteReply()
1498+ }
1499+ }
1500+ } else {
1501+ // Non-text message: give a longer haptic so the user
1502+ // feels the gesture was received but can't quote it,
1503+ // and surface a brief toast so the reason is clear.
1504+ haptics.performHapticFeedback(androidx.compose.ui.hapticfeedback.HapticFeedbackType.LongPress)
1505+ scope.launch { snackbar.showSnackbar(cantQuoteMsg) }
1506+ }
1507+ }
1508+ false
1509+ },
1510+ )
1511+ // In RTL locales, mirror the swipe direction so the reply
1512+ // gesture reads naturally (swipe from the trailing edge
1513+ // toward the leading edge), matching how LTR users swipe
1514+ // left-to-right. Without this, RTL users had no reply swipe.
1515+ val replyFromStartToEnd = layoutDirection != LayoutDirection.Rtl
1516+ SwipeToDismissBox(
1517+ state = swipeState,
1518+ enableDismissFromEndToStart = !replyFromStartToEnd,
1519+ enableDismissFromStartToEnd = replyFromStartToEnd,
1520+ backgroundContent = {
1521+ Box(
1522+ Modifier.fillMaxSize().padding(horizontal = 16.dp),
1523+ contentAlignment = if (replyFromStartToEnd) Alignment.CenterStart else Alignment.CenterEnd,
1524+ ) {
1525+ Icon(
1526+ Icons.AutoMirrored.Filled.Reply,
1527+ contentDescription = null,
1528+ tint = MaterialTheme.colorScheme.onSurfaceVariant,
1529+ )
1530+ }
1531+ },
1532+ ) {
1533+ MessageBubble(
1534+ message,
1535+ isRunning = running && message.info.id == lastMessageId,
1536+ imageContext = imageContext,
1537+ modelLabel = modelLabel,
1538+ agentLabel = agentLabel,
1539+ onOpenFile = onOpenFile,
1540+ onRevert = { vm.revertTo(message.info.id) },
1541+ onEdit = { text -> // editMessage reverts to before this message (hiding it and
1542+ // everything after); the revert banner surfaces the rewind
1543+ // with an Undo. Focus + scroll the composer into view like the
1544+ // Quote action so the prefilled draft isn't off-screen.
1545+ haptics.performHapticFeedback(androidx.compose.ui.hapticfeedback.HapticFeedbackType.TextHandleMove)
1546+ vm.editMessage(message.info.id, text)
1547+ runCatching { inputFocusRequester.requestFocus() }
1548+ contentScope.launch {
1549+ runCatchingCancellable {
1550+ listState.animateScrollToItem(listItems.lastIndex.coerceAtLeast(0))
1551+ }
1552+ }
1553+ },
1554+ onSpeak = { text ->
1555+ if (!tts.toggle(message.info.id, text)) {
1556+ // TTS engine unavailable (init failed / not yet ready
1557+ // / blank text): surface feedback so the button doesn't
1558+ // appear dead. Throttled so a rapid double-tap (stop
1559+ // then immediate re-tap before ready) doesn't spam.
1560+ scope.launch { snackbar.showSnackbar(ttsUnavailableMsg) }
1561+ }
1562+ },
1563+ isSpeaking = message.info.id == speakingMessageId,
1564+ ttsState = if (message.info.id == speakingMessageId) ttsState else TtsState.IDLE,
1565+ onPause = { tts.pause() },
1566+ onResume = { tts.resume() },
1567+ onStop = { tts.stop() },
1568+ onQuote = { text ->
1569+ vm.quoteReply(text)
1570+ runCatching { inputFocusRequester.requestFocus() }
1571+ },
1572+ onBranch = { text -> vm.branchFrom(text) },
1573+ // Regenerate is only meaningful for a finished assistant reply
1574+ // (not the actively-streaming one), so gate it on !running.
1575+ onRegenerate = if (!running) {
1576+ { vm.regenerate(message.info.id) }
1577+ } else null,
1578+ // Continue: resume a partial reply. Shown only for
1579+ // incomplete assistant messages (a partial reply that
1580+ // was aborted) and not while a run is active.
1581+ onContinue = if (!running && message.info is AssistantMessage && !message.info.isComplete) {
1582+ { vm.continueRun(message.info.id) }
1583+ } else null,
1584+ sendStatus = optimisticStatuses[message.info.id]?.let { failed ->
1585+ if (failed) soy.iko.opencode.ui.chat.MessageSendStatus.FAILED
1586+ else soy.iko.opencode.ui.chat.MessageSendStatus.SENDING
1587+ },
1588+ isEdited = message.info.time?.let { it.updated != null && it.updated != it.created } == true,
1589+ onRetry = optimisticStatuses[message.info.id]?.let { failed ->
1590+ if (failed) {
1591+ { vm.retryOptimisticMessage(message.info.id) }
1592+ } else {
1593+ null
1594+ }
1595+ },
1596+ onDismiss = optimisticStatuses[message.info.id]?.let { failed ->
1597+ if (failed) {
1598+ { vm.dismissOptimistic(message.info.id) }
1599+ } else {
1600+ null
1601+ }
1602+ },
1603+ onShare = {
1604+ // Per-message share: build a single-message Markdown
1605+ // transcript off-thread and fire ACTION_SEND, mirroring the
1606+ // whole-conversation share but scoped to just this message.
1607+ scope.launch {
1608+ val md = withContext(Dispatchers.Default) {
1609+ buildMessageMarkdown(message)
1610+ } ?: return@launch
1611+ val send = android.content.Intent(android.content.Intent.ACTION_SEND).apply {
1612+ type = "text/markdown"
1613+ putExtra(android.content.Intent.EXTRA_SUBJECT, sessionTitle ?: defaultShareSubject)
1614+ putExtra(android.content.Intent.EXTRA_TEXT, md)
1615+ }
1616+ runCatchingCancellable { shareContext.startActivity(android.content.Intent.createChooser(send, shareContext.getString(R.string.share_message))) }
1617+ .onFailure { showToast(shareContext, shareContext.getString(R.string.no_share_app)) }
1618+ }
1619+ },
1620+ isFirstOfSpeaker = item.isFirstOfSpeaker,
1621+ highlighted = focusedMessageId != null && message.info.id == focusedMessageId,
1622+ )
1623+ }
1624+ }
1625+ }
1626+ }
1627+ }
1628+ if (running) {
1629+ item(key = "__typing") {
1630+ val workingText = stringResource(R.string.working)
1631+ // When the SSE stream dropped mid-run, show a "reconnecting" label
1632+ // instead of the plain "working" text so the user understands the
1633+ // run is still active but the stream is reconnecting (not finished).
1634+ val reconnectingText = stringResource(R.string.reconnecting)
1635+ val interruptedLabel = if (streamInterrupted) reconnectingText else workingText
1636+ // Elapsed-since-run chip driven by the VM's runStartMs so the timer
1637+ // survives LazyColumn recycling — a local remember reset to 0:00 when
1638+ // the row was disposed and scrolled back into view. The VM stamps the
1639+ // start on the real false→true transition (send/run/init), not on
1640+ // SSE-reconnect relight, so reconnects don't restart the clock. Updates
1641+ // once per second; the value is decorative (the a11y label is the row's).
1642+ // The clock freezes when an abort is confirmed (aborting = true) so the
1643+ // user can see how long the run lasted before they stopped it, rather
1644+ // than the clock continuing to tick until SessionIdle clears _running.
1645+ val startMs by vm.runStartMs.collectAsStateWithLifecycle()
1646+ val elapsedMs by produceState(0L, startMs, aborting) {
1647+ if (startMs == 0L) return@produceState
1648+ if (aborting) {
1649+ // Freeze at the last-computed value: one final snapshot then stop.
1650+ value = (System.currentTimeMillis() - startMs).coerceAtLeast(0L)
1651+ return@produceState
1652+ }
1653+ while (true) {
1654+ value = (System.currentTimeMillis() - startMs).coerceAtLeast(0L)
1655+ delay(1000)
1656+ }
1657+ }
1658+ val elapsedText = remember(elapsedMs) {
1659+ val total = elapsedMs / 1000
1660+ // Locale.US for stable digit formatting: on locales with
1661+ // non-ASCII digits (ar-/fa-) the default locale would render
1662+ // localized digits inside the Monospace block, breaking the
1663+ // fixed-width alignment the monospace family was chosen for.
1664+ String.format(java.util.Locale.US, "%d:%02d", total / 60, total % 60)
1665+ }
1666+ Row(
1667+ verticalAlignment = Alignment.CenterVertically,
1668+ // Animate this slot in/out so the working row doesn't pop in and
1669+ // jolt the message list when a run starts/stops — matching the
1670+ // AnimatedVisibility used by every other transient banner/FAB here.
1671+ modifier = Modifier
1672+ .then(reducedMotionAnimateItem())
1673+ .padding(vertical = 4.dp),
1674+ ) {
1675+ // Merge the indicator + label + clock into one TalkBack node so
1676+ // it's announced once (the working label, then the elapsed time)
1677+ // instead of "working… / working… / 0:14" with the label read
1678+ // twice. The Stop IconButton below stays separately focusable.
1679+ Row(
1680+ verticalAlignment = Alignment.CenterVertically,
1681+ modifier = Modifier.semantics(mergeDescendants = true) {
1682+ contentDescription = "$interruptedLabel $elapsedText"
1683+ },
1684+ ) {
1685+ // Dim the spinner when interrupted so the row reads as
1686+ // "paused/reconnecting" rather than actively progressing.
1687+ CircularProgressIndicator(
1688+ Modifier.size(16.dp),
1689+ strokeWidth = 2.dp,
1690+ color = if (streamInterrupted) MaterialTheme.colorScheme.onSurfaceVariant
1691+ else MaterialTheme.colorScheme.primary,
1692+ )
1693+ Text(interruptedLabel, style = MaterialTheme.typography.labelMedium, modifier = Modifier.padding(start = 6.dp))
1694+ Spacer(Modifier.size(8.dp))
1695+ Icon(
1696+ Icons.Filled.Schedule,
1697+ contentDescription = null,
1698+ modifier = Modifier.size(14.dp),
1699+ tint = MaterialTheme.colorScheme.onSurfaceVariant,
1700+ )
1701+ Text(
1702+ elapsedText,
1703+ style = MaterialTheme.typography.labelMedium,
1704+ fontFamily = androidx.compose.ui.text.font.FontFamily.Monospace,
1705+ color = MaterialTheme.colorScheme.onSurfaceVariant,
1706+ modifier = Modifier.padding(start = 4.dp),
1707+ )
1708+ }
1709+ // A trailing Stop on the working row so the run can be aborted
1710+ // without scrolling back to the composer (which may be off-screen
1711+ // while the user reads the streaming output up-thread).
1712+ Spacer(Modifier.weight(1f))
1713+ val stopLabel = stringResource(R.string.stop)
1714+ IconButton(
1715+ onClick = { vm.abort() },
1716+ modifier = Modifier.semantics { contentDescription = stopLabel },
1717+ ) {
1718+ Icon(Icons.Filled.Stop, contentDescription = null)
1719+ }
1720+ }
1721+ }
1722+ }
1723+ }
1724+ }
1725+ }
1726+ }
1727+ // Jump-to-latest affordance when the user has scrolled away during a stream.
1728+ val fabMotion = rememberVisibilityTransitions()
1729+ AnimatedVisibility(
1730+ visible = !isPinnedToBottom && listItems.isNotEmpty(),
1731+ enter = fabMotion.enter,
1732+ exit = fabMotion.exit,
1733+ // Inset by sideMargin on wide screens so the FAB tracks the capped list's
1734+ // edge instead of floating at the screen edge (visually detached on tablets).
1735+ modifier = Modifier.align(Alignment.BottomEnd).padding(end = sideMargin),
1736+ ) {
1737+ // Badge the FAB when new content arrived while the user was scrolled up, so
1738+ // they know there's something new to jump to (cleared once back at bottom).
1739+ BadgedBox(
1740+ badge = {
1741+ if (newContentCount > 0) {
1742+ // Merge the count into the badge announcement so TalkBack reads
1743+ // "5 new messages" instead of the bare label and a separate number.
1744+ val newContentLabel = pluralStringResource(
1745+ R.plurals.plurals_new_messages,
1746+ newContentCount,
1747+ newContentCount,
1748+ )
1749+ Badge(
1750+ modifier = Modifier.semantics {
1751+ contentDescription = newContentLabel
1752+ // Announce new-content counts as they change so a
1753+ // TalkBack user hears "5 new messages" without having
1754+ // to focus the FAB. Polite so it doesn't interrupt an
1755+ // in-progress utterance (e.g. streaming token reads).
1756+ liveRegion = androidx.compose.ui.semantics.LiveRegionMode.Polite
1757+ },
1758+ ) {
1759+ Text(
1760+ if (newContentCount > 99) "99+" else newContentCount.toString(),
1761+ modifier = Modifier.semantics { invisibleToUser() },
1762+ )
1763+ }
1764+ }
1765+ },
1766+ modifier = Modifier.padding(end = 16.dp, bottom = 16.dp),
1767+ ) {
1768+ ExtendedFloatingActionButton(
1769+ onClick = {
1770+ newContentCount = 0
1771+ if (listItems.isNotEmpty()) {
1772+ // Scroll to the effective last index, including the
1773+ // trailing "__typing" row when a run is active.
1774+ val target = if (running) listItems.size else listItems.lastIndex
1775+ contentScope.launch { runCatchingCancellable { listState.animateScrollToItem(target) } }
1776+ }
1777+ },
1778+ // contentDescription null: the visible "Latest" text already labels
1779+ // the FAB, so a description here makes TalkBack announce "Latest" twice.
1780+ icon = { Icon(Icons.Filled.KeyboardArrowDown, contentDescription = null) },
1781+ text = { Text(stringResource(R.string.latest)) },
1782+ )
1783+ }
1784+ }
1785+ // Scroll-to-top affordance: a small FAB at the start edge, visible when the
1786+ // user has scrolled down past the first few messages. Symmetric to the
1787+ // jump-to-latest FAB, for long conversations where manual fling back is tedious.
1788+ val scrolledDown by remember {
1789+ derivedStateOf { listState.firstVisibleItemIndex > 0 || listState.firstVisibleItemScrollOffset > 200 }
1790+ }
1791+ AnimatedVisibility(
1792+ visible = scrolledDown && listItems.size > 4,
1793+ enter = fabMotion.enter,
1794+ exit = fabMotion.exit,
1795+ modifier = Modifier.align(Alignment.BottomStart).padding(start = sideMargin),
1796+ ) {
1797+ SmallFloatingActionButton(
1798+ onClick = {
1799+ contentScope.launch { runCatchingCancellable { listState.animateScrollToItem(0) } }
1800+ },
1801+ modifier = Modifier.padding(start = 16.dp, bottom = 16.dp),
1802+ ) {
1803+ Icon(
1804+ Icons.Filled.KeyboardArrowUp,
1805+ contentDescription = stringResource(R.string.scroll_to_top),
1806+ )
1807+ }
1808+ }
1809+ // In-conversation search bar. Overlays the list so typing filters messages in
1810+ // place; the match count + a no-matches note give immediate feedback.
1811+ val searchMotion = rememberVisibilityTransitions()
1812+ AnimatedVisibility(
1813+ visible = searchActive,
1814+ enter = searchMotion.enter,
1815+ exit = searchMotion.exit,
1816+ // Inset by sideMargin on wide screens so the search bar spans the capped
1817+ // list's width, not the full screen width.
1818+ modifier = Modifier.align(Alignment.TopCenter).padding(horizontal = sideMargin),
1819+ ) {
1820+ Surface(
1821+ tonalElevation = 3.dp,
1822+ modifier = Modifier
1823+ .padding(horizontal = 12.dp, vertical = 4.dp)
1824+ .fillMaxWidth()
1825+ .onSizeChanged { searchbarHeightPx = it.height },
1826+ ) {
1827+ // Focus the search field when the bar appears (from the overflow menu's
1828+ // "Find in conversation" or Ctrl+F), so the user can start typing
1829+ // immediately. Runs after the search field enters the composition.
1830+ LaunchedEffect(searchActive) {
1831+ if (searchActive) runCatching { searchFocusRequester.requestFocus() }
1832+ }
1833+ Row(
1834+ modifier = Modifier.padding(start = 8.dp, end = 4.dp),
1835+ verticalAlignment = Alignment.CenterVertically,
1836+ ) {
1837+ OutlinedTextField(
1838+ value = chatSearch,
1839+ onValueChange = { chatSearch = it },
1840+ modifier = Modifier.weight(1f).focusRequester(searchFocusRequester),
1841+ placeholder = { Text(stringResource(R.string.search_in_conversation)) },
1842+ singleLine = true,
1843+ leadingIcon = { Icon(Icons.Filled.Search, contentDescription = null) },
1844+ keyboardOptions = KeyboardOptions(imeAction = ImeAction.Search),
1845+ )
1846+ // Match counter: "N of M" where N is the focused match (1-based) and
1847+ // M is the total matching messages. Only shown when there's a query.
1848+ val matchCount = searchMessages.size
1849+ Text(
1850+ if (searchQuery.isNotEmpty() && matchCount > 0) {
1851+ stringResource(R.string.search_match_count, searchPos + 1, matchCount)
1852+ } else if (searchQuery.isNotEmpty()) {
1853+ stringResource(R.string.search_no_matches)
1854+ } else "",
1855+ style = MaterialTheme.typography.labelSmall,
1856+ color = MaterialTheme.colorScheme.onSurfaceVariant,
1857+ modifier = Modifier
1858+ .padding(horizontal = 4.dp)
1859+ // Live region so a TalkBack user hears "3 of 12" / "No
1860+ // matches" announce as they step through results, not just
1861+ // the sighted user seeing the counter update.
1862+ .semantics { liveRegion = androidx.compose.ui.semantics.LiveRegionMode.Polite },
1863+ )
1864+ // Step through matches (Previous / Next), disabled when there are
1865+ // fewer than two to navigate. Wrap around at the ends so repeated
1866+ // taps cycle through every hit.
1867+ val prevLabel = stringResource(R.string.find_previous)
1868+ val nextLabel = stringResource(R.string.find_next)
1869+ IconButton(
1870+ onClick = {
1871+ if (matchCount > 0) {
1872+ searchPos = (searchPos - 1 + matchCount) % matchCount
1873+ }
1874+ },
1875+ enabled = matchCount > 1,
1876+ ) {
1877+ Icon(Icons.Filled.KeyboardArrowUp, contentDescription = prevLabel)
1878+ }
1879+ IconButton(
1880+ onClick = {
1881+ if (matchCount > 0) {
1882+ searchPos = (searchPos + 1) % matchCount
1883+ }
1884+ },
1885+ enabled = matchCount > 1,
1886+ ) {
1887+ Icon(Icons.Filled.KeyboardArrowDown, contentDescription = nextLabel)
1888+ }
1889+ IconButton(onClick = {
1890+ searchActive = false
1891+ chatSearch = ""
1892+ }) {
1893+ Icon(Icons.Filled.Close, contentDescription = stringResource(R.string.clear_search))
1894+ }
1895+ }
1896+ }
1897+ }
1898+ // When a search yields no matches (but the conversation isn't empty), say so
1899+ // instead of showing a blank list.
1900+ if (searchActive && searchQuery.isNotEmpty() && searchMessages.isEmpty() && messages.isNotEmpty()) {
1901+ Text(
1902+ stringResource(R.string.search_no_matches),
1903+ style = MaterialTheme.typography.bodyMedium,
1904+ color = MaterialTheme.colorScheme.onSurfaceVariant,
1905+ modifier = Modifier.align(Alignment.Center),
1906+ )
1907+ }
1908+ }
1909+ }
1910+ }
1911+ }
1912+
1913+ if (showExitConfirm) {
1914+ AlertDialog(
1915+ onDismissRequest = { showExitConfirm = false },
1916+ title = { Text(stringResource(R.string.stop_and_exit_title)) },
1917+ text = { Text(stringResource(R.string.stop_and_exit_text)) },
1918+ confirmButton = {
1919+ TextButton(onClick = {
1920+ showExitConfirm = false
1921+ haptics.performHapticFeedback(androidx.compose.ui.hapticfeedback.HapticFeedbackType.TextHandleMove)
1922+ vm.abort()
1923+ onBack()
1924+ }) { Text(stringResource(R.string.stop_and_exit)) }
1925+ },
1926+ dismissButton = {
1927+ TextButton(onClick = { showExitConfirm = false }) { Text(stringResource(R.string.stay)) }
1928+ },
1929+ )
1930+ }
1931+
1932+ if (showSummarizeConfirm) {
1933+ AlertDialog(
1934+ onDismissRequest = { showSummarizeConfirm = false },
1935+ title = { Text(stringResource(R.string.summarize_confirm_title)) },
1936+ text = { Text(stringResource(R.string.summarize_confirm_text)) },
1937+ confirmButton = {
1938+ TextButton(onClick = {
1939+ showSummarizeConfirm = false
1940+ vm.summarize()
1941+ }) { Text(stringResource(R.string.action_continue)) }
1942+ },
1943+ dismissButton = {
1944+ TextButton(onClick = { showSummarizeConfirm = false }) { Text(stringResource(R.string.cancel)) }
1945+ },
1946+ )
1947+ }
1948+
1949+ if (showInitConfirm) {
1950+ AlertDialog(
1951+ onDismissRequest = { showInitConfirm = false },
1952+ title = { Text(stringResource(R.string.init_confirm_title)) },
1953+ text = { Text(stringResource(R.string.init_confirm_text)) },
1954+ confirmButton = {
1955+ TextButton(onClick = {
1956+ showInitConfirm = false
1957+ vm.initProject()
1958+ }) { Text(stringResource(R.string.action_continue)) }
1959+ },
1960+ dismissButton = {
1961+ TextButton(onClick = { showInitConfirm = false }) { Text(stringResource(R.string.cancel)) }
1962+ },
1963+ )
1964+ }
1965+
1966+ if (showRenameDialog) {
1967+ RenameSessionChatDialog(
1968+ initialTitle = sessionTitle ?: "",
1969+ onDismiss = { showRenameDialog = false },
1970+ onConfirm = { newName ->
1971+ showRenameDialog = false
1972+ vm.renameSession(newName)
1973+ },
1974+ )
1975+ }
1976+
1977+ if (showDeleteDialog) {
1978+ AlertDialog(
1979+ onDismissRequest = { showDeleteDialog = false },
1980+ title = { Text(stringResource(R.string.delete_session_chat_title)) },
1981+ text = { Text(stringResource(R.string.delete_session_chat_text, sessionTitle ?: sessionLabel)) },
1982+ confirmButton = {
1983+ TextButton(onClick = {
1984+ showDeleteDialog = false
1985+ haptics.performHapticFeedback(androidx.compose.ui.hapticfeedback.HapticFeedbackType.LongPress)
1986+ vm.deleteSession()
1987+ }) { Text(stringResource(R.string.delete), color = MaterialTheme.colorScheme.error) }
1988+ },
1989+ dismissButton = {
1990+ TextButton(onClick = { showDeleteDialog = false }) { Text(stringResource(R.string.cancel)) }
1991+ },
1992+ )
1993+ }
1994+
1995+ if (showShellDialog) {
1996+ ShellCommandDialog(
1997+ onDismiss = { showShellDialog = false },
1998+ onRun = { cmd ->
1999+ showShellDialog = false
2000+ vm.runShell(cmd)
2001+ },
2002+ )
2003+ }
2004+
2005+ if (showModelPicker) {
2006+ // Resolve persisted recent composite keys to the live ModelOption entries they refer
2007+ // to, dropping any whose model is no longer offered by the server. Ordered by
2008+ // recency (head of the store first).
2009+ val recentOptions = remember(models, recentModelEntries) {
2010+ val byKey = models.associateBy { it.providerID to it.modelID }
2011+ recentModelEntries.mapNotNull { entry ->
2012+ container.recentModelsStore.split(entry)?.let { (p, m) -> byKey[p to m] }
2013+ }
2014+ }
2015+ // Resolve snackbar strings in the composable scope; the onSetPreferredModel lambda
2016+ // below isn't @Composable, so stringResource can't be called inside it.
2017+ val defaultModelClearedMsg = stringResource(R.string.default_model_cleared)
2018+ val defaultModelSetFmt = stringResource(R.string.default_model_set, "%s")
2019+ ModelPickerSheet(
2020+ options = models,
2021+ selected = selectedModel,
2022+ loading = modelsLoading,
2023+ error = modelsError,
2024+ onSelect = {
2025+ vm.selectModel(it)
2026+ container.recentModelsStore.add(it.providerID, it.modelID)
2027+ },
2028+ onRetry = { vm.reloadModels() },
2029+ onDismiss = { showModelPicker = false },
2030+ preferredModelId = preferredModelId,
2031+ onSetPreferredModel = { id ->
2032+ scope.launch {
2033+ runCatchingCancellable { container.settingsStore.setPreferredModelId(id) }
2034+ // Confirm the change with a snackbar so the user sees it took effect —
2035+ // the toggle's label flip can be missed, especially when clearing.
2036+ val msg = if (id.isEmpty()) {
2037+ defaultModelClearedMsg
2038+ } else {
2039+ val label = models.firstOrNull { it.modelID == id }?.modelLabel ?: id
2040+ defaultModelSetFmt.format(label)
2041+ }
2042+ snackbar.showSnackbar(msg)
2043+ }
2044+ },
2045+ recent = recentOptions,
2046+ )
2047+ }
2048+
2049+ if (showAgentPicker) {
2050+ AgentPickerSheet(
2051+ agents = agents,
2052+ selected = selectedAgent,
2053+ loading = agentsLoading,
2054+ error = agentsError,
2055+ onSelect = { vm.selectAgent(it?.name) },
2056+ onRetry = { vm.reloadAgents() },
2057+ onDismiss = { showAgentPicker = false },
2058+ )
2059+ }
2060+
2061+ if (showCommandPicker) {
2062+ CommandPickerSheet(
2063+ commands = commands,
2064+ loading = commandsLoading,
2065+ error = commandsError,
2066+ onSelect = { vm.runCommand(it) },
2067+ onRetry = { vm.reloadCommands() },
2068+ onDismiss = { showCommandPicker = false },
2069+ )
2070+ }
2071+
2072+ pendingPermission?.let { permission ->
2073+ PermissionDialog(
2074+ permission = permission,
2075+ position = permissionProgress.position,
2076+ total = permissionProgress.total,
2077+ onRespond = { response -> vm.respondPermission(permission, response) },
2078+ // On auto-reject timeout, post a notification so a returning user finds a
2079+ // persistent record of why the run stopped (the dialog itself is gone).
2080+ // Gated by the user's notification setting (notifPermission).
2081+ onAutoReject = {
2082+ val conn = activeConnection
2083+ val ctx = appContext
2084+ val title = sessionTitle ?: sessionId
2085+ if (notifPermission) {
2086+ soy.iko.opencode.notification.SessionNotifications.postPermissionAutoRejected(
2087+ ctx, sessionId, title, conn?.profile?.id,
2088+ )
2089+ }
2090+ },
2091+ )
2092+ }
2093+
2094+ if (showPalette) {
2095+ CommandPalette(actions = paletteActions, onDismiss = { showPalette = false })
2096+ }
2097+
2098+ if (showShortcutsDialog) {
2099+ // Surfaces the hardware-keyboard shortcuts (Ctrl+K palette, Escape stop, Enter send)
2100+ // that are otherwise wired but undiscoverable. A simple key/value list; Enter behavior
2101+ // depends on the "Send on Enter" setting, noted inline.
2102+ AlertDialog(
2103+ onDismissRequest = { showShortcutsDialog = false },
2104+ title = { Text(stringResource(R.string.keyboard_shortcuts_title)) },
2105+ text = {
2106+ Column(verticalArrangement = Arrangement.spacedBy(10.dp)) {
2107+ ShortcutRow("Ctrl + K", stringResource(R.string.shortcut_open_palette))
2108+ ShortcutRow("Esc", stringResource(R.string.shortcut_stop_run))
2109+ ShortcutRow("Esc", stringResource(R.string.shortcut_close))
2110+ ShortcutRow("Enter", stringResource(R.string.shortcut_send))
2111+ ShortcutRow("Shift + Enter / Ctrl + Enter", stringResource(R.string.shortcut_newline))
2112+ }
2113+ },
2114+ confirmButton = {
2115+ TextButton(onClick = { showShortcutsDialog = false }) { Text(stringResource(R.string.action_continue)) }
2116+ },
2117+ )
2118+ }
2119+}
2120+
2121+@Composable
2122+private fun ShortcutRow(keys: String, desc: String) {
2123+ Row(verticalAlignment = Alignment.CenterVertically) {
2124+ Text(
2125+ keys,
2126+ style = MaterialTheme.typography.labelLarge,
2127+ fontFamily = androidx.compose.ui.text.font.FontFamily.Monospace,
2128+ modifier = Modifier.widthIn(min = 160.dp),
2129+ )
2130+ Text(
2131+ desc,
2132+ style = MaterialTheme.typography.bodyMedium,
2133+ color = MaterialTheme.colorScheme.onSurfaceVariant,
2134+ )
2135+ }
2136+}
2137+
2138+/**
2139+ * Slash-command autocomplete: when the draft starts with "/", show a filtered dropdown
2140+ * of matching commands above the composer. Tapping a command fires it immediately.
2141+ * Extracted from [ChatInputBar] to keep that function's cyclomatic complexity under
2142+ * the detekt threshold. Suppressed while running or when the command catalog is empty.
2143+ */
2144+@Composable
2145+private fun SlashCommandAutocomplete(
2146+ value: String,
2147+ commands: List<Command>,
2148+ running: Boolean,
2149+ onRunCommand: (Command) -> Unit,
2150+) {
2151+ if (running || commands.isEmpty()) return
2152+ val slashQuery = remember(value) {
2153+ if (value.startsWith("/")) value.removePrefix("/") else null
2154+ } ?: return
2155+ val matchingCommands = remember(slashQuery, commands) {
2156+ commands.filter { cmd ->
2157+ slashQuery.isEmpty() ||
2158+ cmd.name.contains(slashQuery, ignoreCase = true) ||
2159+ (cmd.description?.contains(slashQuery, ignoreCase = true) == true)
2160+ }.take(8)
2161+ }
2162+ if (matchingCommands.isNotEmpty()) {
2163+ CommandAutocompleteDropdown(
2164+ commands = matchingCommands,
2165+ onPick = onRunCommand,
2166+ )
2167+ }
2168+}
2169+
2170+/**
2171+ * Slash-command autocomplete dropdown shown above the composer when the draft starts
2172+ * with "/". Renders up to 8 matching commands as a scrollable, elevated surface so the
2173+ * user can discover and invoke commands by typing the conventional "/" prefix instead
2174+ * of opening the overflow menu / command palette. Tapping a row fires the command.
2175+ */
2176+@Composable
2177+private fun CommandAutocompleteDropdown(
2178+ commands: List<Command>,
2179+ onPick: (Command) -> Unit,
2180+) {
2181+ val haptics = LocalHapticFeedback.current
2182+ Surface(
2183+ color = MaterialTheme.colorScheme.surface,
2184+ tonalElevation = 3.dp,
2185+ shape = MaterialTheme.shapes.medium,
2186+ modifier = Modifier
2187+ .fillMaxWidth()
2188+ .padding(horizontal = 8.dp, vertical = 4.dp)
2189+ .heightIn(max = 240.dp),
2190+ ) {
2191+ LazyColumn {
2192+ items(
2193+ count = commands.size,
2194+ key = { commands[it].name },
2195+ ) { i ->
2196+ val cmd = commands[i]
2197+ Row(
2198+ modifier = Modifier
2199+ .fillMaxWidth()
2200+ .clickable(role = Role.Button) {
2201+ haptics.performHapticFeedback(androidx.compose.ui.hapticfeedback.HapticFeedbackType.TextHandleMove)
2202+ onPick(cmd)
2203+ }
2204+ .padding(horizontal = 16.dp, vertical = 10.dp),
2205+ verticalAlignment = Alignment.CenterVertically,
2206+ horizontalArrangement = Arrangement.spacedBy(12.dp),
2207+ ) {
2208+ Text(
2209+ "/${cmd.name}",
2210+ style = MaterialTheme.typography.labelLarge,
2211+ fontFamily = androidx.compose.ui.text.font.FontFamily.Monospace,
2212+ color = MaterialTheme.colorScheme.primary,
2213+ )
2214+ cmd.description?.takeIf { it.isNotBlank() }?.let { desc ->
2215+ Text(
2216+ desc,
2217+ style = MaterialTheme.typography.bodySmall,
2218+ color = MaterialTheme.colorScheme.onSurfaceVariant,
2219+ maxLines = 1,
2220+ overflow = TextOverflow.Ellipsis,
2221+ )
2222+ }
2223+ }
2224+ }
2225+ }
2226+ }
2227+}
2228+
2229+@OptIn(androidx.compose.foundation.ExperimentalFoundationApi::class)
2230+@Suppress("CyclomaticComplexMethod")
2231+@Composable
2232+private fun ChatInputBar(
2233+ value: String,
2234+ onValueChange: (String) -> Unit,
2235+ running: Boolean,
2236+ aborting: Boolean,
2237+ enabled: Boolean,
2238+ sendOnEnter: Boolean,
2239+ onSend: () -> Unit,
2240+ onAbort: () -> Unit,
2241+ queuedFollowUp: String?,
2242+ onQueueFollowUp: (String) -> Unit,
2243+ onCancelQueue: () -> Unit,
2244+ focusRequester: androidx.compose.ui.focus.FocusRequester,
2245+ attachments: List<PendingAttachment>,
2246+ staging: Boolean,
2247+ stagingFileCount: Int,
2248+ onRemoveAttachment: (String) -> Unit,
2249+ onPickPhoto: () -> Unit,
2250+ onPickFile: () -> Unit,
2251+ onCamera: () -> Unit,
2252+ onVoice: () -> Unit,
2253+ onPasteImage: (List<Uri>) -> Unit,
2254+ commands: List<Command> = emptyList(),
2255+ onRunCommand: (Command) -> Unit = {},
2256+) {
2257+ // Sendable when there's text OR at least one attachment (an image-only prompt is valid).
2258+ val hasContent = value.isNotBlank() || attachments.isNotEmpty()
2259+ val context = LocalContext.current
2260+ // Full-screen editor state: opened when the user wants more space for a long prompt.
2261+ var showFullScreenEditor by rememberSaveable { mutableStateOf(false) }
2262+ Surface(tonalElevation = 3.dp, modifier = Modifier.imePadding()) {
2263+ Column(modifier = Modifier.fillMaxWidth().windowInsetsPadding(WindowInsets.navigationBars)) {
2264+ // A queued follow-up replaces the Stop button with a "queued" chip so the
2265+ // user sees their message will be sent when the run finishes, and can cancel.
2266+ if (queuedFollowUp != null) {
2267+ val editLabel = stringResource(R.string.edit)
2268+ Row(
2269+ modifier = Modifier
2270+ .fillMaxWidth()
2271+ .padding(start = 12.dp, top = 6.dp, end = 4.dp),
2272+ verticalAlignment = Alignment.CenterVertically,
2273+ ) {
2274+ // Tapping the chip reloads the queued text into the draft (and clears the
2275+ // queue) so a typo spotted while queuing can be fixed without retyping.
2276+ Column(
2277+ modifier = Modifier
2278+ .weight(1f)
2279+ .clip(MaterialTheme.shapes.small)
2280+ .clickable(role = Role.Button, onClickLabel = editLabel) {
2281+ onValueChange(queuedFollowUp)
2282+ onCancelQueue()
2283+ }
2284+ .padding(vertical = 4.dp),
2285+ ) {
2286+ Text(
2287+ stringResource(R.string.queued),
2288+ style = MaterialTheme.typography.labelSmall,
2289+ color = MaterialTheme.colorScheme.onSurfaceVariant,
2290+ )
2291+ Text(
2292+ queuedFollowUp,
2293+ style = MaterialTheme.typography.bodySmall,
2294+ color = MaterialTheme.colorScheme.onSurfaceVariant,
2295+ maxLines = 1,
2296+ overflow = TextOverflow.Ellipsis,
2297+ )
2298+ }
2299+ TextButton(onClick = onCancelQueue, contentPadding = androidx.compose.foundation.layout.PaddingValues(horizontal = 8.dp)) {
2300+ Text(stringResource(R.string.cancel))
2301+ }
2302+ }
2303+ }
2304+ // Staged attachments: horizontally-scrollable thumbnails/chips, each removable.
2305+ AttachmentStrip(attachments, onRemove = onRemoveAttachment, staging = staging, stagingFileCount = stagingFileCount)
2306+ // Slash-command autocomplete: extracted to a helper to keep this function's
2307+ // complexity under the detekt threshold. Returns no-op when the draft doesn't
2308+ // start with "/" or the command catalog is empty.
2309+ SlashCommandAutocomplete(
2310+ value = value,
2311+ commands = commands,
2312+ running = running,
2313+ onRunCommand = onRunCommand,
2314+ )
2315+ Row(
2316+ modifier = Modifier.fillMaxWidth().padding(8.dp),
2317+ verticalAlignment = Alignment.Bottom,
2318+ ) {
2319+ // Attach menu: photo picker, camera, or any file.
2320+ var showAttachMenu by remember { mutableStateOf(false) }
2321+ Box {
2322+ IconButton(onClick = { showAttachMenu = true }, enabled = enabled) {
2323+ Icon(Icons.Filled.Add, contentDescription = stringResource(R.string.add_attachment))
2324+ }
2325+ DropdownMenu(expanded = showAttachMenu, onDismissRequest = { showAttachMenu = false }) {
2326+ DropdownMenuItem(
2327+ leadingIcon = { Icon(Icons.Filled.PhotoLibrary, contentDescription = null) },
2328+ text = { Text(stringResource(R.string.attach_photo)) },
2329+ onClick = { showAttachMenu = false; onPickPhoto() },
2330+ )
2331+ DropdownMenuItem(
2332+ leadingIcon = { Icon(Icons.Filled.PhotoCamera, contentDescription = null) },
2333+ text = { Text(stringResource(R.string.attach_camera)) },
2334+ onClick = { showAttachMenu = false; onCamera() },
2335+ )
2336+ DropdownMenuItem(
2337+ leadingIcon = { Icon(Icons.Filled.Description, contentDescription = null) },
2338+ text = { Text(stringResource(R.string.attach_file)) },
2339+ onClick = { showAttachMenu = false; onPickFile() },
2340+ )
2341+ }
2342+ }
2343+ // Voice dictation: appends recognized speech to the draft. Hidden (not just
2344+ // disabled) when the device has no speech-recognition activity, so a user
2345+ // without a voice app doesn't get a button that only fails noisily on tap.
2346+ val voiceAvailable = remember {
2347+ val pm = context.packageManager
2348+ val intent = Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH)
2349+ pm.queryIntentActivities(intent, 0).isNotEmpty()
2350+ }
2351+ if (voiceAvailable) {
2352+ IconButton(onClick = onVoice, enabled = enabled) {
2353+ Icon(Icons.Filled.Mic, contentDescription = stringResource(R.string.voice_input))
2354+ }
2355+ }
2356+ // Expand to a full-screen editor for long prompts (the inline field caps at 6 lines).
2357+ IconButton(onClick = { showFullScreenEditor = true }, enabled = enabled) {
2358+ Icon(Icons.Filled.Expand, contentDescription = stringResource(R.string.expand_editor))
2359+ }
2360+ OutlinedTextField(
2361+ value = value,
2362+ onValueChange = { v ->
2363+ // Cap input length so a huge paste can't stall the UI. Shares are
2364+ // capped separately in MainActivity; this guards typed/pasted drafts.
2365+ onValueChange(v.take(NetworkConfig.maxDraftLengthChars))
2366+ },
2367+ modifier = Modifier
2368+ .weight(1f)
2369+ .focusRequester(focusRequester)
2370+ .testTag("chat_input")
2371+ // Intercept image content pasted/dropped into the field (keyboard paste
2372+ // of a copied screenshot, drag from Files, etc.) and route it through the
2373+ // same staging path as the attach menu. Non-image content (text) falls
2374+ // through unchanged so normal typing/paste works.
2375+ .contentReceiver(
2376+ remember {
2377+ androidx.compose.foundation.content.ReceiveContentListener { transferable ->
2378+ val clipData = transferable.clipEntry?.clipData
2379+ if (clipData != null) {
2380+ val imageUris = (0 until clipData.itemCount).mapNotNull { i ->
2381+ val item = clipData.getItemAt(i)
2382+ item.uri?.takeIf { uri ->
2383+ item.text == null && uri.toString().let { s ->
2384+ s.startsWith("content:") || s.startsWith("file:")
2385+ }
2386+ }
2387+ }
2388+ if (imageUris.isNotEmpty()) {
2389+ onPasteImage(imageUris)
2390+ }
2391+ }
2392+ transferable
2393+ }
2394+ },
2395+ )
2396+ .onPreviewKeyEvent { event ->
2397+ if (event.type != KeyEventType.KeyDown || event.key != Key.Enter) return@onPreviewKeyEvent false
2398+ // With "Send on Enter" on, Enter sends (Shift+Enter newlines).
2399+ // With it off, Enter inserts a newline and Ctrl+Enter sends.
2400+ val send = enterShouldSend(
2401+ enabled = enabled,
2402+ hasContent = hasContent,
2403+ sendOnEnter = sendOnEnter,
2404+ shift = event.isShiftPressed,
2405+ ctrl = event.isCtrlPressed,
2406+ )
2407+ if (send) {
2408+ if (running) onQueueFollowUp(value) else onSend()
2409+ true
2410+ } else {
2411+ false
2412+ }
2413+ },
2414+ // While a run is active a typed message only queues (sends after the run), so
2415+ // the placeholder says so instead of the plain "Message…".
2416+ placeholder = {
2417+ Text(stringResource(if (running) R.string.composer_hint_running else R.string.message_placeholder))
2418+ },
2419+ enabled = enabled,
2420+ maxLines = 6,
2421+ // Show a "N / max" countdown once the draft crosses a high fraction of
2422+ // the cap, so the user knows a paste is about to be truncated instead
2423+ // of being silently cut off. Hidden for normal short prompts to avoid
2424+ // clutter under a typical one-line message.
2425+ supportingText = {
2426+ val threshold = (NetworkConfig.maxDraftLengthChars * NetworkConfig.draftCountdownThresholdFraction).toInt()
2427+ if (value.length >= threshold) {
2428+ Text(
2429+ stringResource(
2430+ R.string.draft_chars_remaining,
2431+ NetworkConfig.maxDraftLengthChars - value.length,
2432+ NetworkConfig.maxDraftLengthChars,
2433+ ),
2434+ style = MaterialTheme.typography.labelSmall,
2435+ color = if (value.length >= NetworkConfig.maxDraftLengthChars) MaterialTheme.colorScheme.error
2436+ else MaterialTheme.colorScheme.onSurfaceVariant,
2437+ )
2438+ } else if (value.lines().size > 6) {
2439+ // The inline field caps at 6 lines; once the draft crosses that,
2440+ // hint that a bigger full-screen editor exists (the Expand icon
2441+ // above is easy to miss among the icon row). A tappable label
2442+ // would be ideal, but a plain hint is enough to draw attention.
2443+ Text(
2444+ stringResource(R.string.open_full_editor_hint),
2445+ style = MaterialTheme.typography.labelSmall,
2446+ color = MaterialTheme.colorScheme.onSurfaceVariant,
2447+ )
2448+ }
2449+ },
2450+ keyboardOptions = KeyboardOptions(
2451+ // When "Send on Enter" is on, expose ImeAction.Send so the soft
2452+ // keyboard shows a send key — matching the setting's intent and
2453+ // giving touch-only users a keyboard send affordance. When off,
2454+ // ImeAction.Default keeps the enter/newline key for multi-line input.
2455+ imeAction = if (sendOnEnter) ImeAction.Send else ImeAction.Default,
2456+ capitalization = KeyboardCapitalization.Sentences,
2457+ ),
2458+ keyboardActions = KeyboardActions(
2459+ onSend = {
2460+ if (enabled && hasContent) onSend()
2461+ },
2462+ ),
2463+ )
2464+ ComposerTrailingButton(
2465+ running = running,
2466+ aborting = aborting,
2467+ canSend = enabled && hasContent,
2468+ canQueue = enabled && value.isNotBlank(),
2469+ onSend = onSend,
2470+ onAbort = onAbort,
2471+ onQueue = { onQueueFollowUp(value) },
2472+ )
2473+ }
2474+ }
2475+ if (showFullScreenEditor) {
2476+ FullScreenEditor(
2477+ value = value,
2478+ onValueChange = onValueChange,
2479+ onDismiss = { showFullScreenEditor = false },
2480+ onSend = {
2481+ showFullScreenEditor = false
2482+ // Mirror the inline composer's behavior: while a run is active a send
2483+ // can't go immediately, so queue the follow-up instead of silently
2484+ // dropping it (vm.send() returns false during a run, which previously
2485+ // lost the typed message with no feedback).
2486+ if (running) onQueueFollowUp(value) else onSend()
2487+ },
2488+ canSend = enabled && hasContent,
2489+ running = running,
2490+ sendOnEnter = sendOnEnter,
2491+ attachments = attachments,
2492+ onRemoveAttachment = onRemoveAttachment,
2493+ staging = staging,
2494+ stagingFileCount = stagingFileCount,
2495+ )
2496+ }
2497+ }
2498+}
2499+
2500+/** Full-screen editor dialog for composing long prompts. Gives the full viewport height to
2501+ * the text field (vs the inline 6-line cap) with a Send button and a collapse action. */
2502+@OptIn(ExperimentalMaterial3Api::class)
2503+@Composable
2504+private fun FullScreenEditor(
2505+ value: String,
2506+ onValueChange: (String) -> Unit,
2507+ onDismiss: () -> Unit,
2508+ onSend: () -> Unit,
2509+ canSend: Boolean,
2510+ running: Boolean = false,
2511+ sendOnEnter: Boolean = false,
2512+ attachments: List<PendingAttachment> = emptyList(),
2513+ onRemoveAttachment: (String) -> Unit = {},
2514+ staging: Boolean = false,
2515+ stagingFileCount: Int = 0,
2516+) {
2517+ androidx.compose.ui.window.Dialog(
2518+ onDismissRequest = onDismiss,
2519+ properties = androidx.compose.ui.window.DialogProperties(usePlatformDefaultWidth = false, decorFitsSystemWindows = false),
2520+ ) {
2521+ // Cap the editor width on large screens (tablets) so the text field doesn't stretch
2522+ // edge-to-edge — matching the chat list's readability rationale. BoxWithConstraints
2523+ // gives the available width so we can center a capped-width column.
2524+ androidx.compose.foundation.layout.BoxWithConstraints(
2525+ modifier = Modifier.fillMaxSize(),
2526+ contentAlignment = Alignment.Center,
2527+ ) {
2528+ val hPad = if (maxWidth > NetworkConfig.twoPaneWidthThresholdDp.dp)
2529+ ((maxWidth - NetworkConfig.composerDialogMaxWidthDp.dp) / 2).coerceAtLeast(0.dp)
2530+ else 0.dp
2531+ Scaffold(
2532+ modifier = Modifier.padding(horizontal = hPad),
2533+ topBar = {
2534+ androidx.compose.material3.TopAppBar(
2535+ title = { Text(stringResource(R.string.compose_editor_title)) },
2536+ navigationIcon = {
2537+ androidx.compose.material3.TextButton(onClick = onDismiss) {
2538+ Text(stringResource(R.string.collapse_editor))
2539+ }
2540+ },
2541+ )
2542+ },
2543+ bottomBar = {
2544+ Surface(tonalElevation = 3.dp) {
2545+ Row(
2546+ modifier = Modifier.fillMaxWidth().imePadding().padding(12.dp),
2547+ horizontalArrangement = Arrangement.End,
2548+ ) {
2549+ androidx.compose.material3.Button(onClick = onSend, enabled = canSend) {
2550+ Text(stringResource(if (running) R.string.queue else R.string.send))
2551+ }
2552+ }
2553+ }
2554+ },
2555+ ) { padding ->
2556+ Column(modifier = Modifier.fillMaxSize().padding(padding)) {
2557+ // Show staged attachments in the full-screen editor too, so a user who staged
2558+ // images then expanded for a long prompt can still see and remove them without
2559+ // collapsing first (mirrors the inline composer's AttachmentStrip).
2560+ AttachmentStrip(attachments, onRemove = onRemoveAttachment, staging = staging, stagingFileCount = stagingFileCount)
2561+ OutlinedTextField(
2562+ value = value,
2563+ onValueChange = { v -> onValueChange(v.take(NetworkConfig.maxDraftLengthChars)) },
2564+ modifier = Modifier
2565+ .fillMaxSize()
2566+ .weight(1f)
2567+ // Honor the "Send on Enter" setting here too, so the full-screen
2568+ // editor matches the inline composer: Enter sends (Shift+Enter
2569+ // newlines) when on; Enter inserts a newline and Ctrl+Enter sends
2570+ // when off. Previously this hard-coded ImeAction.Default and had no
2571+ // key handler, so a hardware-keyboard user got a different behaviour
2572+ // from the inline composer depending on which they happened to open.
2573+ .onPreviewKeyEvent { event ->
2574+ if (event.type != KeyEventType.KeyDown || event.key != Key.Enter) return@onPreviewKeyEvent false
2575+ val send = enterShouldSend(
2576+ enabled = canSend,
2577+ hasContent = canSend,
2578+ sendOnEnter = sendOnEnter,
2579+ shift = event.isShiftPressed,
2580+ ctrl = event.isCtrlPressed,
2581+ )
2582+ if (send) { onSend(); true } else false
2583+ },
2584+ placeholder = { Text(stringResource(R.string.message_placeholder)) },
2585+ maxLines = Int.MAX_VALUE,
2586+ keyboardOptions = KeyboardOptions(
2587+ imeAction = if (sendOnEnter) ImeAction.Send else ImeAction.Default,
2588+ capitalization = KeyboardCapitalization.Sentences,
2589+ ),
2590+ keyboardActions = KeyboardActions(
2591+ onSend = { if (canSend) onSend() },
2592+ ),
2593+ )
2594+ }
2595+ }
2596+ }
2597+ }
2598+}
2599+
2600+/** Whether a hardware Enter keypress should send: never when disabled/empty; otherwise
2601+ * Enter sends (unless Shift) when send-on-Enter is on, else only Ctrl+Enter sends. */
2602+private fun enterShouldSend(
2603+ enabled: Boolean,
2604+ hasContent: Boolean,
2605+ sendOnEnter: Boolean,
2606+ shift: Boolean,
2607+ ctrl: Boolean,
2608+): Boolean = when {
2609+ !enabled || !hasContent -> false
2610+ sendOnEnter -> !shift
2611+ else -> ctrl
2612+}
2613+
2614+/** The composer's trailing button: while a run is active a Stop (with in-flight spinner),
2615+ * preceded by a Queue button when the user has typed a follow-up; otherwise Send. Extracted so
2616+ * [ChatInputBar] stays under the complexity threshold. */
2617+@Composable
2618+private fun ComposerTrailingButton(
2619+ running: Boolean,
2620+ aborting: Boolean,
2621+ canSend: Boolean,
2622+ canQueue: Boolean,
2623+ onSend: () -> Unit,
2624+ onAbort: () -> Unit,
2625+ onQueue: () -> Unit,
2626+) {
2627+ if (running) {
2628+ Row(verticalAlignment = Alignment.CenterVertically) {
2629+ // While a run is active the trailing action is Stop, so the only send affordance is
2630+ // the keyboard's IME action — which is a plain newline when "Send on Enter" is off.
2631+ // That leaves a touch-only user with the setting off no way to queue a follow-up
2632+ // (Ctrl+Enter needs a hardware keyboard). Surface an explicit Queue button whenever
2633+ // there's typed TEXT so queuing is always reachable, without changing the user's
2634+ // Enter-inserts-a-newline preference. Gate on typed text — not the send-oriented
2635+ // canSend, which is also true for an attachment-only composer — because queuing "" just
2636+ // calls setQueuedFollowUp(null), silently cancelling any already-queued follow-up and
2637+ // dropping the staged attachment (queued follow-ups don't carry attachments anyway).
2638+ if (canQueue) {
2639+ IconButton(
2640+ onClick = onQueue,
2641+ modifier = Modifier.testTag("queue_button"),
2642+ ) {
2643+ // PlaylistAdd reads as "add to a queue/list" more clearly than a clock
2644+ // icon (which can be read as "snooze" or "later"), and isn't confused with
2645+ // the Send action sitting right beside the Stop button.
2646+ Icon(
2647+ Icons.AutoMirrored.Filled.PlaylistAdd,
2648+ contentDescription = stringResource(R.string.queue_followup),
2649+ )
2650+ }
2651+ }
2652+ // Show a spinner while the abort REST call is in flight so the user sees the stop
2653+ // was sent, and disable to prevent a double-tap.
2654+ IconButton(
2655+ onClick = onAbort,
2656+ enabled = !aborting,
2657+ modifier = Modifier.padding(start = 4.dp).testTag("stop_button"),
2658+ ) {
2659+ if (aborting) {
2660+ val stopLabel = stringResource(R.string.stop)
2661+ CircularProgressIndicator(
2662+ Modifier.size(18.dp).semantics { contentDescription = stopLabel },
2663+ strokeWidth = 2.dp,
2664+ )
2665+ } else {
2666+ Icon(Icons.Filled.Stop, contentDescription = stringResource(R.string.stop))
2667+ }
2668+ }
2669+ }
2670+ } else {
2671+ IconButton(
2672+ onClick = onSend,
2673+ enabled = canSend,
2674+ modifier = Modifier.padding(start = 4.dp).testTag("send_button"),
2675+ ) {
2676+ // Tint the send icon with primary when there's content to send so the commit action
2677+ // draws the eye; muted otherwise. A plain enabled/disabled flip is easy to miss.
2678+ Icon(
2679+ Icons.AutoMirrored.Filled.Send,
2680+ contentDescription = stringResource(R.string.send),
2681+ tint = if (canSend) MaterialTheme.colorScheme.primary
2682+ else MaterialTheme.colorScheme.onSurfaceVariant,
2683+ )
2684+ }
2685+ }
2686+}
2687+
2688+@OptIn(androidx.compose.foundation.layout.ExperimentalLayoutApi::class)
2689+@Composable
2690+private fun EmptyConversation(
2691+ onSuggestion: (String) -> Unit,
2692+ modifier: Modifier = Modifier,
2693+) {
2694+ // A few example prompts so a first-time user has a one-tap path to their first
2695+ // message instead of staring at a blank input. Tapping a chip fills the draft
2696+ // (without sending) so the user can edit it before sending.
2697+ val suggestions = remember {
2698+ listOf(
2699+ R.string.empty_chat_suggest_1,
2700+ R.string.empty_chat_suggest_2,
2701+ R.string.empty_chat_suggest_3,
2702+ )
2703+ }
2704+ Column(
2705+ modifier = modifier.padding(32.dp),
2706+ horizontalAlignment = Alignment.CenterHorizontally,
2707+ ) {
2708+ Icon(
2709+ Icons.Filled.AutoAwesome,
2710+ contentDescription = null,
2711+ modifier = Modifier.size(48.dp),
2712+ tint = MaterialTheme.colorScheme.onSurfaceVariant,
2713+ )
2714+ Spacer(Modifier.size(16.dp))
2715+ Text(
2716+ stringResource(R.string.empty_chat_title),
2717+ style = MaterialTheme.typography.titleMedium,
2718+ )
2719+ Spacer(Modifier.size(8.dp))
2720+ Text(
2721+ stringResource(R.string.empty_chat_hint),
2722+ style = MaterialTheme.typography.bodyMedium,
2723+ color = MaterialTheme.colorScheme.onSurfaceVariant,
2724+ )
2725+ Spacer(Modifier.size(20.dp))
2726+ // Suggestion chips wrap across rows on narrow screens instead of stacking full-width,
2727+ // so a longer localized prompt doesn't push the chips off-screen on a phone.
2728+ FlowRow(
2729+ modifier = Modifier.fillMaxWidth(),
2730+ horizontalArrangement = Arrangement.spacedBy(8.dp),
2731+ verticalArrangement = Arrangement.spacedBy(8.dp),
2732+ ) {
2733+ suggestions.forEach { resId ->
2734+ val text = stringResource(resId)
2735+ androidx.compose.material3.AssistChip(
2736+ onClick = { onSuggestion(text) },
2737+ label = { Text(text, style = MaterialTheme.typography.bodyMedium) },
2738+ )
2739+ }
2740+ }
2741+ }
2742+}
2743+
2744+/** A banner shown while a revert checkpoint is active, offering an Undo (unrevert). When the
2745+ * server included a diff of the revert, a collapsible "Show what changed" affordance reveals
2746+ * it inline via [DiffView] so the user can see what was rolled back before deciding to undo. */
2747+@Composable
2748+private fun RevertBanner(diff: String?, isEditing: Boolean, onUndo: () -> Unit) {
2749+ val haptics = LocalHapticFeedback.current
2750+ var showDiff by rememberSaveable { mutableStateOf(false) }
2751+ val expandMotion = rememberVisibilityTransitions()
2752+ Surface(
2753+ color = MaterialTheme.colorScheme.tertiaryContainer,
2754+ tonalElevation = 2.dp,
2755+ modifier = Modifier.fillMaxWidth(),
2756+ ) {
2757+ Column {
2758+ Row(
2759+ modifier = Modifier.fillMaxWidth().padding(start = 12.dp, end = 4.dp, top = 4.dp, bottom = 4.dp),
2760+ verticalAlignment = Alignment.CenterVertically,
2761+ horizontalArrangement = Arrangement.SpaceBetween,
2762+ ) {
2763+ Row(verticalAlignment = Alignment.CenterVertically, modifier = Modifier.weight(1f)) {
2764+ Icon(
2765+ if (isEditing) Icons.Filled.Edit else Icons.Filled.Restore,
2766+ contentDescription = null,
2767+ tint = MaterialTheme.colorScheme.onTertiaryContainer,
2768+ modifier = Modifier.size(18.dp),
2769+ )
2770+ Text(
2771+ stringResource(if (isEditing) R.string.editing_banner else R.string.reverted_banner),
2772+ style = MaterialTheme.typography.bodySmall,
2773+ color = MaterialTheme.colorScheme.onTertiaryContainer,
2774+ modifier = Modifier.padding(start = 8.dp),
2775+ )
2776+ // "Show what changed" toggle, shown only when the server provided a diff.
2777+ // Collapsible so the banner stays compact by default; a user curious about
2778+ // what the revert rolled back can expand it inline without leaving the chat.
2779+ if (!diff.isNullOrBlank()) {
2780+ TextButton(
2781+ onClick = {
2782+ haptics.performHapticFeedback(androidx.compose.ui.hapticfeedback.HapticFeedbackType.TextHandleMove)
2783+ showDiff = !showDiff
2784+ },
2785+ contentPadding = androidx.compose.foundation.layout.PaddingValues(start = 8.dp, end = 4.dp),
2786+ ) {
2787+ Icon(
2788+ if (showDiff) Icons.Filled.ExpandLess else Icons.Filled.ExpandMore,
2789+ contentDescription = null,
2790+ modifier = Modifier.size(16.dp),
2791+ )
2792+ Text(
2793+ stringResource(if (showDiff) R.string.revert_hide_diff else R.string.revert_show_diff),
2794+ style = MaterialTheme.typography.labelSmall,
2795+ modifier = Modifier.padding(start = 4.dp),
2796+ )
2797+ }
2798+ }
2799+ }
2800+ TextButton(onClick = {
2801+ // Haptic on undo to match the other destructive/important confirmations: a
2802+ // revert restores potentially hundreds of hidden messages.
2803+ haptics.performHapticFeedback(androidx.compose.ui.hapticfeedback.HapticFeedbackType.TextHandleMove)
2804+ onUndo()
2805+ }) { Text(stringResource(R.string.undo)) }
2806+ }
2807+ // The diff render lives inside the banner's Surface so it inherits the tertiary
2808+ // tonal container and reads as part of the banner, not a floating panel.
2809+ if (!diff.isNullOrBlank()) {
2810+ AnimatedVisibility(
2811+ visible = showDiff,
2812+ enter = expandMotion.enter,
2813+ exit = expandMotion.exit,
2814+ ) {
2815+ Column(modifier = Modifier.padding(start = 12.dp, end = 12.dp, bottom = 8.dp)) {
2816+ Text(
2817+ stringResource(R.string.revert_diff_header),
2818+ style = MaterialTheme.typography.labelSmall,
2819+ color = MaterialTheme.colorScheme.onTertiaryContainer,
2820+ modifier = Modifier.padding(bottom = 4.dp),
2821+ )
2822+ DiffView(diff, saveKey = "revertDiff")
2823+ }
2824+ }
2825+ }
2826+ }
2827+ }
2828+}
2829+
2830+/** A dismissible preview card shown above the composer when the user quote-replied to a
2831+ * message. Displays the quoted text (truncated) with a Cancel affordance so the user can
2832+ * abort the quote without digging into the draft to strip the `>`-prefixed lines. Mirrors
2833+ * the Discord/Slack quote-preview pattern. */
2834+@Composable
2835+private fun QuoteReplyBanner(quotedText: String, onCancel: () -> Unit) {
2836+ val haptics = LocalHapticFeedback.current
2837+ Surface(
2838+ color = MaterialTheme.colorScheme.secondaryContainer,
2839+ tonalElevation = 2.dp,
2840+ modifier = Modifier.fillMaxWidth(),
2841+ ) {
2842+ Row(
2843+ modifier = Modifier.fillMaxWidth().padding(start = 12.dp, end = 4.dp, top = 6.dp, bottom = 6.dp),
2844+ verticalAlignment = Alignment.Top,
2845+ ) {
2846+ Icon(
2847+ Icons.Filled.FormatQuote,
2848+ contentDescription = null,
2849+ tint = MaterialTheme.colorScheme.onSecondaryContainer,
2850+ modifier = Modifier.size(18.dp).padding(top = 2.dp),
2851+ )
2852+ Column(modifier = Modifier.weight(1f).padding(start = 8.dp)) {
2853+ Text(
2854+ stringResource(R.string.quote_reply_banner),
2855+ style = MaterialTheme.typography.labelSmall,
2856+ color = MaterialTheme.colorScheme.onSecondaryContainer,
2857+ )
2858+ Text(
2859+ quotedText,
2860+ style = MaterialTheme.typography.bodySmall,
2861+ color = MaterialTheme.colorScheme.onSecondaryContainer,
2862+ maxLines = 2,
2863+ overflow = TextOverflow.Ellipsis,
2864+ )
2865+ }
2866+ IconButton(onClick = {
2867+ haptics.performHapticFeedback(androidx.compose.ui.hapticfeedback.HapticFeedbackType.TextHandleMove)
2868+ onCancel()
2869+ }) {
2870+ Icon(
2871+ Icons.Filled.Close,
2872+ contentDescription = stringResource(R.string.cancel_quote_reply),
2873+ tint = MaterialTheme.colorScheme.onSecondaryContainer,
2874+ modifier = Modifier.size(18.dp),
2875+ )
2876+ }
2877+ }
2878+ }
2879+}
2880+
2881+/** A banner shown while messages composed offline are queued in the outbox, with a
2882+ * "Send now" nudge and a discard. Shows a spinner while the queue is flushing. */
2883+@Composable
2884+private fun OutboxBanner(
2885+ count: Int,
2886+ sending: Boolean,
2887+ onFlush: () -> Unit,
2888+ onDiscard: () -> Unit,
2889+) {
2890+ var showDiscardConfirm by rememberSaveable { mutableStateOf(false) }
2891+ Surface(
2892+ color = MaterialTheme.colorScheme.secondaryContainer,
2893+ tonalElevation = 2.dp,
2894+ modifier = Modifier.fillMaxWidth(),
2895+ ) {
2896+ Row(
2897+ modifier = Modifier.fillMaxWidth().padding(start = 12.dp, end = 4.dp, top = 4.dp, bottom = 4.dp),
2898+ verticalAlignment = Alignment.CenterVertically,
2899+ horizontalArrangement = Arrangement.SpaceBetween,
2900+ ) {
2901+ Row(verticalAlignment = Alignment.CenterVertically, modifier = Modifier.weight(1f)) {
2902+ if (sending) {
2903+ CircularProgressIndicator(
2904+ Modifier.size(16.dp),
2905+ strokeWidth = 2.dp,
2906+ color = MaterialTheme.colorScheme.onSecondaryContainer,
2907+ )
2908+ Spacer(Modifier.size(8.dp))
2909+ }
2910+ Text(
2911+ if (sending) {
2912+ stringResource(R.string.outbox_sending)
2913+ } else {
2914+ val res = if (count == 1) R.string.outbox_pending_one else R.string.outbox_pending_many
2915+ stringResource(res, count)
2916+ },
2917+ style = MaterialTheme.typography.bodySmall,
2918+ color = MaterialTheme.colorScheme.onSecondaryContainer,
2919+ )
2920+ }
2921+ if (!sending) {
2922+ val haptics = LocalHapticFeedback.current
2923+ TextButton(onClick = onFlush) { Text(stringResource(R.string.outbox_flush)) }
2924+ TextButton(onClick = {
2925+ // Confirm before discarding all queued messages (irreversible), matching
2926+ // the confirmation pattern used by deleteSession and other destructive
2927+ // actions. Previously a single tap dropped every queued message.
2928+ haptics.performHapticFeedback(androidx.compose.ui.hapticfeedback.HapticFeedbackType.LongPress)
2929+ showDiscardConfirm = true
2930+ }) {
2931+ Text(stringResource(R.string.outbox_discard_all), color = MaterialTheme.colorScheme.error)
2932+ }
2933+ }
2934+ }
2935+ }
2936+ if (showDiscardConfirm) {
2937+ androidx.compose.material3.AlertDialog(
2938+ onDismissRequest = { showDiscardConfirm = false },
2939+ title = { Text(stringResource(R.string.discard_queued_title)) },
2940+ text = { Text(stringResource(R.string.discard_queued_text, count)) },
2941+ confirmButton = {
2942+ androidx.compose.material3.TextButton(onClick = {
2943+ showDiscardConfirm = false
2944+ onDiscard()
2945+ }) { Text(stringResource(R.string.discard)) }
2946+ },
2947+ dismissButton = {
2948+ androidx.compose.material3.TextButton(onClick = { showDiscardConfirm = false }) {
2949+ Text(stringResource(R.string.cancel))
2950+ }
2951+ },
2952+ )
2953+ }
2954+}
2955+
2956+/** Prompt for a one-off shell command to run in the session's worktree. */
2957+@Composable
2958+private fun ShellCommandDialog(onDismiss: () -> Unit, onRun: (String) -> Unit) {
2959+ var command by rememberSaveable { mutableStateOf("") }
2960+ AlertDialog(
2961+ onDismissRequest = onDismiss,
2962+ title = { Text(stringResource(R.string.run_shell_command)) },
2963+ text = {
2964+ OutlinedTextField(
2965+ value = command,
2966+ onValueChange = { command = it },
2967+ modifier = Modifier.fillMaxWidth(),
2968+ placeholder = { Text(stringResource(R.string.shell_command_hint)) },
2969+ label = { Text(stringResource(R.string.shell_command_label)) },
2970+ singleLine = true,
2971+ keyboardOptions = KeyboardOptions(imeAction = ImeAction.Done),
2972+ keyboardActions = KeyboardActions(onDone = { if (command.isNotBlank()) onRun(command.trim()) }),
2973+ )
2974+ },
2975+ confirmButton = {
2976+ TextButton(
2977+ onClick = { if (command.isNotBlank()) onRun(command.trim()) },
2978+ enabled = command.isNotBlank(),
2979+ ) { Text(stringResource(R.string.run)) }
2980+ },
2981+ dismissButton = { TextButton(onClick = onDismiss) { Text(stringResource(R.string.cancel)) } },
2982+ )
2983+}
2984+
2985+/**
2986+ * Change signal for the auto-scroll-on-stream watcher. Primitive fields avoid the
2987+ * boxing `Triple<Int, Int, Boolean>` would impose on every snapshot evaluation, and
2988+ * equality is structural so `snapshotFlow` emits only when something relevant changes.
2989+ */
2990+private data class AutoScrollSignal(val size: Int, val lastTextLength: Int, val pinned: Boolean)
2991+
2992+/** Length of the streaming content carried by [part], driving auto-scroll as it grows.
2993+ * Covers text, reasoning, and tool output so a pinned view keeps following non-text
2994+ * streaming, not just plain assistant text. O(1). */
2995+private fun streamingContentLength(part: Part?): Int = when (part) {
2996+ is TextPart -> part.text.length
2997+ is ReasoningPart -> part.text.length
2998+ is ToolPart -> when (val st = part.state) {
2999+ is ToolCompleted -> st.output?.length ?: 0
3000+ is ToolError -> st.error?.length ?: 0
3001+ is ToolRunning -> st.title?.length ?: 0
3002+ else -> 0
3003+ }
3004+ else -> 0
3005+}
3006+
3007+/** Rename dialog for the currently-open session. Mirrors the SessionListScreen rename
3008+ * dialog but lives in the chat screen so the user can rename without backing out to
3009+ * the list. Pre-filled with the current title; the cap matches the list dialog. */
3010+@Composable
3011+private fun RenameSessionChatDialog(
3012+ initialTitle: String,
3013+ onDismiss: () -> Unit,
3014+ onConfirm: (String) -> Unit,
3015+) {
3016+ // Seed the field once (no key input) so a later external title change — e.g. opencode
3017+ // auto-generating a session title after the first prompt, arriving via SessionUpdated —
3018+ // doesn't re-initialize the box and discard the user's in-progress edit.
3019+ var title by rememberSaveable { mutableStateOf(initialTitle) }
3020+ AlertDialog(
3021+ onDismissRequest = onDismiss,
3022+ title = { Text(stringResource(R.string.rename_session_chat)) },
3023+ text = {
3024+ OutlinedTextField(
3025+ value = title,
3026+ onValueChange = { v -> title = v.take(NetworkConfig.maxSessionTitleChars) },
3027+ modifier = Modifier.fillMaxWidth(),
3028+ placeholder = { Text(stringResource(R.string.session_title_hint)) },
3029+ label = { Text(stringResource(R.string.rename_session_chat)) },
3030+ singleLine = true,
3031+ keyboardOptions = KeyboardOptions(imeAction = ImeAction.Done),
3032+ keyboardActions = KeyboardActions(onDone = { if (title.isNotBlank()) onConfirm(title.trim()) }),
3033+ )
3034+ },
3035+ confirmButton = {
3036+ TextButton(onClick = { if (title.isNotBlank()) onConfirm(title.trim()) }, enabled = title.isNotBlank()) {
3037+ Text(stringResource(R.string.save))
3038+ }
3039+ },
3040+ dismissButton = {
3041+ TextButton(onClick = onDismiss) { Text(stringResource(R.string.cancel)) }
3042+ },
3043+ )
3044+}
3045+
3046+/**
3047+ * A single item in the chat message list — either a [Message] bubble or a day
3048+ * [Separator] inserted before the first message of a new day. The separator shifts
3049+ * the LazyColumn indices vs. the raw messages list, so scroll-target math must use
3050+ * the [List] of these items (not `messages.size`/`lastIndex`).
3051+ */
3052+private sealed interface MessageListItem {
3053+ val key: Any
3054+ val contentType: Any
3055+
3056+ data class Message(
3057+ val message: MessageWithParts,
3058+ override val key: Any,
3059+ // Whether this is the first message in a consecutive run of the same speaker (role).
3060+ // Used to suppress the assistant avatar/header on follow-up messages in the same run,
3061+ // reducing visual noise in tool-heavy conversations where many assistant messages
3062+ // appear back-to-back. A separator or a role change resets the flag.
3063+ val isFirstOfSpeaker: Boolean,
3064+ ) : MessageListItem {
3065+ override val contentType: Any get() = message.info::class
3066+ }
3067+
3068+ data class Separator(val label: String, val ordinal: Int) : MessageListItem {
3069+ // Key on the day-occurrence ordinal, not the label: two non-contiguous groups
3070+ // can share a label (e.g. an untimestamped message — empty label — between two
3071+ // same-day messages, or two untimestamped groups), and a label-only key would
3072+ // then collide, which makes LazyColumn throw on duplicate keys. The ordinal is
3073+ // stable for a given message ordering so slots aren't needlessly recreated.
3074+ override val key: Any get() = "sep_${ordinal}_$label"
3075+ // Separators share a contentType so the LazyColumn can recycle their slots.
3076+ override val contentType: Any get() = "separator"
3077+ }
3078+}
3079+
3080+/**
3081+ * Build the interleaved list of [MessageListItem]s for the message list, inserting a
3082+ * [MessageListItem.Separator] before the first message of each new calendar day. Uses
3083+ * the message's `time.created` (falling back to `updated` then `completed`) to bucket.
3084+ * Messages with no timestamp are grouped under an empty-label separator only if they
3085+ * start the list, so a server that omits timestamps doesn't suppress the first divider.
3086+ *
3087+ * [todayLabel]/[yesterdayLabel] are resolved by the caller (a @Composable can't call
3088+ * stringResource from inside this plain function) and used for the "Today"/"Yesterday"
3089+ * labels; older days fall back to a locale-stable medium-date format.
3090+ */
3091+private fun buildMessageListItems(
3092+ messages: List<MessageWithParts>,
3093+ todayLabel: String,
3094+ yesterdayLabel: String,
3095+): List<MessageListItem> {
3096+ if (messages.isEmpty()) return emptyList()
3097+ val today = java.time.LocalDate.now(java.time.ZoneId.systemDefault())
3098+ val dateFmt = mediumDateFormat()
3099+ val result = ArrayList<MessageListItem>(messages.size + 4)
3100+ val seenKeys = HashSet<String>(messages.size * 2)
3101+ var lastDayKey: String? = null
3102+ var sepOrdinal = 0
3103+ var emptyIdOrdinal = 0
3104+ var first = true
3105+ // Track the previous message's role to detect consecutive same-speaker runs, so the
3106+ // avatar/header can be suppressed on follow-up messages in the same run. A null means
3107+ // "no previous message or a separator just interrupted the run", both of which make the
3108+ // next message the first of its group.
3109+ var prevRoleClass: kotlin.reflect.KClass<out soy.iko.opencode.data.model.MessageInfo>? = null
3110+ for (message in messages) {
3111+ val ts = message.info.time?.created ?: message.info.time?.updated ?: message.info.time?.completed
3112+ val dayKey = ts?.let { dayKey(it) } ?: ""
3113+ // Emit a separator before the very first message (so a leading un-timestamped message
3114+ // still gets the first divider, empty label and all), and thereafter only when crossing
3115+ // into a new NON-empty calendar day. An un-timestamped message mid-list (empty key)
3116+ // neither emits its own separator nor resets the day — otherwise a following same-day
3117+ // message would see a "" -> "<today>" transition and emit a duplicate "Today" header.
3118+ if (first || (dayKey.isNotEmpty() && dayKey != lastDayKey)) {
3119+ result.add(MessageListItem.Separator(dayLabel(dayKey, ts ?: 0L, today, todayLabel, yesterdayLabel, dateFmt), sepOrdinal++))
3120+ // A date separator visually breaks a speaker run, so the next message is treated
3121+ // as the first of its group (even if the same role continues across the day break).
3122+ prevRoleClass = null
3123+ }
3124+ if (dayKey.isNotEmpty()) lastDayKey = dayKey
3125+ first = false
3126+ // Most messages have a unique non-empty id. An unrecognized-role message can carry an
3127+ // empty id — and the reducer intentionally keeps several such messages as distinct
3128+ // holders — so give each a stable synthetic key and defensively de-collide any remaining
3129+ // duplicate; otherwise LazyColumn throws on a duplicate key and the whole screen crashes.
3130+ var key = message.info.id.ifEmpty { "msg-empty-${emptyIdOrdinal++}" }
3131+ if (!seenKeys.add(key)) {
3132+ var suffix = 1
3133+ while (!seenKeys.add("$key#$suffix")) suffix++
3134+ key = "$key#$suffix"
3135+ }
3136+ val roleClass = message.info::class
3137+ val isFirstOfSpeaker = prevRoleClass == null || roleClass != prevRoleClass
3138+ result.add(MessageListItem.Message(message, key, isFirstOfSpeaker))
3139+ prevRoleClass = roleClass
3140+ }
3141+ return result
3142+}
3143+
3144+/**
3145+ * A stable bucket key for a timestamp's calendar day (epoch-days as a string).
3146+ *
3147+ * [buildMessageListItems] re-runs on every streaming snapshot (the memo is keyed on the
3148+ * whole `messages` list, which must stay so the live message's fresh parts render), so a
3149+ * naive implementation would re-allocate an `Instant`/`ZonedDateTime`/`LocalDate` for
3150+ * every message on every token. Message timestamps are immutable once assigned, so we
3151+ * memoize the parse per epoch-millis: after the first snapshot, each unchanged message is
3152+ * a cheap hash lookup. Bounded LRU (access-order) caps memory; only touched on the main
3153+ * thread during composition, so the coarse lock is uncontended.
3154+ */
3155+private val dayKeyCache = object : LinkedHashMap<Long, String>(128, 0.75f, true) {
3156+ override fun removeEldestEntry(eldest: MutableMap.MutableEntry<Long, String>): Boolean = size > 1024
3157+}
3158+
3159+private fun dayKey(epochMillis: Long): String = synchronized(dayKeyCache) {
3160+ dayKeyCache.getOrPut(epochMillis) {
3161+ java.time.Instant.ofEpochMilli(epochMillis)
3162+ .atZone(java.time.ZoneId.systemDefault()).toLocalDate().toEpochDay().toString()
3163+ }
3164+}
3165+
3166+// The medium-date formatter is an ICU locale lookup; cache one instance instead of
3167+// allocating a fresh one per buildMessageListItems call, rebuilding only if the default
3168+// locale changes at runtime. Main-thread-only, so no synchronization is needed.
3169+private var cachedDateFmt: java.text.DateFormat? = null
3170+private var cachedDateFmtLocale: java.util.Locale? = null
3171+
3172+private fun mediumDateFormat(): java.text.DateFormat {
3173+ val locale = java.util.Locale.getDefault()
3174+ val existing = cachedDateFmt
3175+ if (existing != null && cachedDateFmtLocale == locale) return existing
3176+ return java.text.DateFormat.getDateInstance(java.text.DateFormat.MEDIUM).also {
3177+ cachedDateFmt = it
3178+ cachedDateFmtLocale = locale
3179+ }
3180+}
3181+
3182+/**
3183+ * Resolve a day-key back to a human-readable label. "Today" / "Yesterday" for the
3184+ * recent days, otherwise a locale-stable medium-date format. Returns an empty string
3185+ * when [dayKey] is empty (no timestamp) so no separator is rendered for un-timestamped
3186+ * messages.
3187+ */
3188+private fun dayLabel(
3189+ dayKey: String,
3190+ ts: Long,
3191+ today: java.time.LocalDate,
3192+ todayLabel: String,
3193+ yesterdayLabel: String,
3194+ dateFmt: java.text.DateFormat,
3195+): String {
3196+ if (dayKey.isEmpty()) return ""
3197+ val epochDay = dayKey.toLongOrNull() ?: return ""
3198+ val date = java.time.LocalDate.ofEpochDay(epochDay)
3199+ return when {
3200+ date == today -> todayLabel
3201+ date == today.minusDays(1) -> yesterdayLabel
3202+ else -> dateFmt.format(java.util.Date(ts))
3203+ }
3204+}
3205+
3206+/**
3207+ * A centered day divider in the message list. Renders nothing for an empty label
3208+ * (the no-timestamp case) so un-timestamped messages don't get a stray blank divider.
3209+ */
3210+@Composable
3211+private fun DateSeparator(label: String) {
3212+ if (label.isBlank()) return
3213+ Row(
3214+ modifier = Modifier.fillMaxWidth(),
3215+ horizontalArrangement = Arrangement.Center,
3216+ ) {
3217+ Surface(
3218+ color = MaterialTheme.colorScheme.surfaceVariant,
3219+ shape = MaterialTheme.shapes.small,
3220+ // Marked as a heading so TalkBack users can navigate day-by-day with the
3221+ // heading-skip gesture — the canonical affordance for date dividers in a list.
3222+ modifier = Modifier.semantics(mergeDescendants = true) { heading() },
3223+ ) {
3224+ Text(
3225+ label,
3226+ style = MaterialTheme.typography.labelSmall,
3227+ color = MaterialTheme.colorScheme.onSurfaceVariant,
3228+ modifier = Modifier.padding(horizontal = 12.dp, vertical = 4.dp),
3229+ )
3230+ }
3231+ }
3232+}
3233+
3234+/** Skeleton placeholder bubbles for the chat loading and run-started states. Alpha pulses
3235+ * (gated by reduced-motion) to convey ongoing work; the column carries the a11y label so
3236+ * TalkBack announces "Loading" instead of reading the skeleton bars. Rendered as a
3237+ * [BoxScope] extension so it can align itself to the top center of its host box. */
3238+@Composable
3239+private fun androidx.compose.foundation.layout.BoxScope.ChatSkeleton(topPad: androidx.compose.ui.unit.Dp) {
3240+ val loadingLabel = stringResource(R.string.loading)
3241+ val reducedMotion = LocalReducedMotion.current
3242+ val transition = rememberInfiniteTransition(label = "skeleton")
3243+ val pulse by transition.animateFloat(
3244+ initialValue = 0.35f,
3245+ targetValue = 0.7f,
3246+ animationSpec = infiniteRepeatable(tween(900), RepeatMode.Reverse),
3247+ label = "skeletonAlpha",
3248+ )
3249+ val skeletonAlpha = if (reducedMotion) 0.5f else pulse
3250+ val skeletonColor = MaterialTheme.colorScheme.surfaceVariant
3251+ @Composable
3252+ fun bar(widthFraction: Float) {
3253+ Box(
3254+ Modifier
3255+ .fillMaxWidth(widthFraction)
3256+ .height(14.dp)
3257+ .clip(RoundedCornerShape(4.dp))
3258+ .background(skeletonColor)
3259+ .alpha(skeletonAlpha),
3260+ )
3261+ }
3262+ Column(
3263+ modifier = Modifier
3264+ .align(Alignment.TopCenter)
3265+ .padding(top = topPad)
3266+ .padding(16.dp)
3267+ .fillMaxWidth()
3268+ .semantics { contentDescription = loadingLabel },
3269+ verticalArrangement = Arrangement.spacedBy(14.dp),
3270+ ) {
3271+ repeat(4) { i ->
3272+ val left = i % 2 == 0
3273+ Row(
3274+ modifier = Modifier.fillMaxWidth(),
3275+ horizontalArrangement = if (left) Arrangement.Start else Arrangement.End,
3276+ ) {
3277+ Column(
3278+ modifier = Modifier.fillMaxWidth(if (left) 0.7f else 0.55f),
3279+ verticalArrangement = Arrangement.spacedBy(6.dp),
3280+ ) {
3281+ bar(1f)
3282+ bar(0.8f)
3283+ }
3284+ }
3285+ }
3286+ }
3287+}