1package tui
2
3import (
4 "encoding/json"
5 "fmt"
6 "os"
7 "regexp"
8 "strconv"
9 "strings"
10
11 "github.com/patriceckhart/zot/internal/provider"
12)
13
14// expandTabs replaces tab characters with 4 spaces so code from
15// tab-indented languages (Go, Makefiles, etc.) renders at a
16// consistent width instead of the terminal's default 8-column tabs.
17func expandTabs(s string) string {
18 return strings.ReplaceAll(s, "\t", " ")
19}
20
21// pathFromToolArgs returns the "path" argument from a tool_call's
22// JSON arguments, or "" if the args aren't a JSON object or don't
23// include one. Used to pick a syntax language for rendering the
24// corresponding tool_result.
25func pathFromToolArgs(raw json.RawMessage) string {
26 if len(raw) == 0 {
27 return ""
28 }
29 var m map[string]any
30 if err := json.Unmarshal(raw, &m); err != nil {
31 return ""
32 }
33 for _, k := range []string{"path", "file_path"} {
34 if s, ok := m[k].(string); ok && s != "" {
35 return s
36 }
37 }
38 return ""
39}
40
41// offsetFromToolArgs returns the read tool's 1-indexed `offset`
42// arg (the first line of the slice the tool was asked to return),
43// or 0 when the call didn't specify one. Used by the tui to draw
44// the line-number gutter aligned to the right starting row, even
45// though the tool's text content itself no longer carries line
46// numbers.
47func offsetFromToolArgs(raw json.RawMessage) int {
48 if len(raw) == 0 {
49 return 0
50 }
51 var m map[string]any
52 if err := json.Unmarshal(raw, &m); err != nil {
53 return 0
54 }
55 switch v := m["offset"].(type) {
56 case float64:
57 return int(v)
58 case int:
59 return v
60 }
61 return 0
62}
63
64// osUserHomeDir is aliased so the test file can swap it.
65var osUserHomeDir = os.UserHomeDir
66
67// View turns a transcript + live state into a slice of styled lines,
68// already wrapped to width.
69type View struct {
70 Theme Theme
71 ImageProto ImageProtocol // how to render inline images in this terminal
72 Messages []provider.Message
73 // toolPaths maps tool_use_id to the "path" argument of the call, if
74 // any, so tool_result rendering can pick the right syntax language.
75 // Rebuilt on each Build().
76 toolPaths map[string]string
77 // toolStartLines maps tool_use_id to the 1-indexed first line
78 // number of a `read` result, pulled from the call's offset arg.
79 // Used by renderNumberedFile to draw a line-number gutter over
80 // raw (unnumbered) file content the model receives. Rebuilt on
81 // each Build().
82 toolStartLines map[string]int
83 // toolCallLabels maps tool_use_id to the box label (tool name +
84 // short args) for the call, so a tool_result message can render
85 // the box top edge without having to look back at the assistant
86 // message that originated the call. Rebuilt on each Build().
87 toolCallLabels map[string]string
88 Streaming string // current assistant text delta
89 StreamingActive bool
90 ToolCalls []ToolCallView // tool calls in flight or completed
91 StatusLine string
92 Err string
93
94 // ExpandAll forces every long tool result to render in full.
95 // Toggled from the tui by ctrl+o. When false, results longer than
96 // ToolCollapseLines collapse to ToolCollapsePreview lines plus a
97 // "... (N more lines, M total, ctrl+o to expand)" footer.
98 ExpandAll bool
99
100 // renderCache holds the per-message rendered line slices so Build
101 // doesn't re-markdown every message on every frame. Keyed by a
102 // struct of (content hash, width, expandAll) — any of those
103 // changing invalidates the entry. Messages are append-only after
104 // they finalise so keeping the cache across turns is safe.
105 //
106 // Streaming/in-flight work (v.Streaming, v.ToolCalls) is never
107 // cached because it changes every delta.
108 renderCache map[msgCacheKey][]string
109}
110
111// msgCacheKey identifies a cached message render. hash is a 64-bit
112// FNV-1a of the message's content, which is cheap to compute and
113// unambiguous enough for the cache (collisions produce a stale frame,
114// not wrong data, and we recompute on invalidation anyway).
115type msgCacheKey struct {
116 hash uint64
117 width int
118 expandAll bool
119 // turnOpen is true when the previous rendered message belongs to
120 // the same agent turn (assistant tool_use, or tool result). The
121 // header ("▍ zot") is suppressed in that case so a single turn
122 // — even one that spans many assistant/tool message round-trips
123 // in the underlying API — renders under one header instead of a
124 // new one per assistant message.
125 turnOpen bool
126}
127
128// InvalidateRenderCache drops all cached message renders. The tui
129// calls this when the transcript is replaced wholesale (/compact,
130// /clear, session swap) since messages can be replaced in place and
131// a content-hash miss alone doesn't reclaim the old entries.
132func (v *View) InvalidateRenderCache() {
133 v.renderCache = nil
134}
135
136// ToolCollapsePreview is the number of lines shown before a long tool
137// result is replaced with a "... ctrl+o to expand" footer. Tool
138// results shorter than ToolCollapseLines always render in full.
139const (
140 ToolCollapsePreview = 10
141 ToolCollapseLines = 12
142)
143
144// ToolCallView is a pending tool invocation plus optional result.
145type ToolCallView struct {
146 ID string
147 Name string
148 Args string // rendered argument summary
149 Result string // rendered result preview (truncated)
150 Error bool
151 Done bool
152
153 // Streaming is true while the model is still typing the tool
154 // call's JSON arguments. The TUI renders a live preview of any
155 // interesting string fields (for `write`, the `content`; for
156 // `bash`, the `command`) so the user can watch the file being
157 // composed. Set to false as soon as EvToolUseEnd arrives.
158 Streaming bool
159
160 // RawJSONBuf is the accumulator of every EvToolUseArgs delta
161 // the stream has delivered for this tool call. Used by the
162 // partial-JSON extractor to peel off the live string value
163 // of one named field on each render.
164 RawJSONBuf string
165
166 // LivePath is the `path` arg extracted as soon as it parses
167 // out of RawJSONBuf. Shown next to the tool name in the header
168 // so the user can see which file is being written to.
169 LivePath string
170}
171
172// MessageAnchor records where a rendered message starts in the chat
173// line slice. Used by /jump so the dialog can scroll the viewport to
174// the row where a turn's user prompt begins.
175type MessageAnchor struct {
176 MessageIdx int // index into v.Messages
177 Row int // first row of that message in the Build() output
178}
179
180// Build returns the chat log lines for the given width.
181func (v *View) Build(width int) []string {
182 lines, _ := v.BuildWithAnchors(width)
183 return lines
184}
185
186// BuildWithAnchors is like Build but additionally reports the first
187// row occupied by each message in v.Messages. Callers that need to
188// scroll to a specific turn (the /jump dialog) use the anchor slice
189// to map a message index back to a row offset.
190func (v *View) BuildWithAnchors(width int) ([]string, []MessageAnchor) {
191 v.refreshToolPaths()
192 if v.renderCache == nil {
193 v.renderCache = make(map[msgCacheKey][]string)
194 }
195
196 // Pre-render every message (hits the cache for unchanged ones) so
197 // we can allocate `out` in a single shot with the exact capacity.
198 // Growing via append on a long transcript copies the backing array
199 // log2(N) times; for a 2000-line scrollback that's enough memcpy
200 // to visibly stutter while typing.
201 rendered := make([][]string, len(v.Messages))
202 total := 0
203 for idx, m := range v.Messages {
204 // A turn is "open" once the assistant has started responding
205 // to the most recent user prompt. Walk back over consecutive
206 // assistant/tool messages: if any non-user message precedes
207 // this one without a user message in between, we're inside
208 // the same turn and should not draw a new "▍ zot" header.
209 turnOpen := false
210 if m.Role == provider.RoleAssistant {
211 for j := idx - 1; j >= 0; j-- {
212 prev := v.Messages[j]
213 // Skip compaction summary messages — they're
214 // rendered as a muted footer line (or hidden
215 // entirely when collapsed) and don't open a turn.
216 if prev.Meta["compaction"] == "true" {
217 continue
218 }
219 if prev.Role == provider.RoleAssistant || prev.Role == provider.RoleTool {
220 turnOpen = true
221 }
222 break
223 }
224 }
225 lines := v.renderMessageCached(m, width, turnOpen)
226 rendered[idx] = lines
227 total += len(lines) + 1 // +1 for the blank separator row
228 }
229
230 out := make([]string, 0, total+16)
231 anchors := make([]MessageAnchor, 0, len(v.Messages))
232 for idx := range v.Messages {
233 anchors = append(anchors, MessageAnchor{MessageIdx: idx, Row: len(out)})
234 out = append(out, rendered[idx]...)
235 // Skip the inter-message blank for messages that rendered
236 // to nothing. An assistant message whose only content is
237 // ToolCallBlock(s) has no rendered output of its own (each
238 // tool result owns its box now), so emitting a blank for it
239 // would compound with the blank from the next real message
240 // and produce two blank rows between adjacent tool boxes.
241 if len(rendered[idx]) == 0 {
242 continue
243 }
244 out = append(out, "")
245 }
246 // Only render the streaming header/body when there's actual
247 // text to show. An empty streaming block (streamOn=true,
248 // Streaming="") appears when a turn starts with a tool_use
249 // block instead of text — in that case the live tool-call
250 // overlay below is the real content and a naked "zot" bar
251 // above it reads as a stray empty message.
252 if v.StreamingActive && strings.TrimSpace(v.Streaming) != "" {
253 // Suppress the streaming "▍ zot" header if the turn is
254 // already open (a previous assistant/tool message in this
255 // turn already rendered one). Otherwise the streaming text
256 // would jump from headerless to under a new header once it
257 // finalises into a transcript message.
258 turnOpen := false
259 for j := len(v.Messages) - 1; j >= 0; j-- {
260 prev := v.Messages[j]
261 if prev.Meta["compaction"] == "true" {
262 continue
263 }
264 if prev.Role == provider.RoleAssistant || prev.Role == provider.RoleTool {
265 turnOpen = true
266 }
267 break
268 }
269 if !turnOpen {
270 out = append(out, v.Theme.FG256(v.Theme.Assistant, "▍ zot"))
271 }
272 // Stream the partial assistant text through the same markdown
273 // renderer used for finalised messages so code fences, diffs,
274 // lists, and inline styles look the same while streaming and
275 // don't suddenly reflow when the turn ends. Indent matches the
276 // finalised assistant body in renderMessage so the column
277 // stays consistent across the stream/finalise transition.
278 // Width is capped so ultra-wide terminals don't produce
279 // edge-to-edge rules / unreadably long prose lines.
280 const indent = " "
281 inner := assistantBodyWidth(width - len(indent))
282 md := RenderMarkdown(v.Streaming, v.Theme, inner)
283 for _, l := range strings.Split(md, "\n") {
284 for _, w := range wrapANSILine(l, inner) {
285 out = append(out, indent+w)
286 }
287 }
288 out = append(out, "")
289 }
290 // Live tool-call overlay: skip any entry whose assistant
291 // tool_use block OR tool_result has already made it into the
292 // transcript. The EvAssistantMessage for a tool-use turn
293 // lands BEFORE executeTools runs, so between that moment and
294 // the tool-result being appended the overlay and the
295 // finalised transcript both render the same call. Checking
296 // for either side of the pair suppresses the duplicate in
297 // both windows.
298 finalised := map[string]bool{}
299 for _, m := range v.Messages {
300 for _, c := range m.Content {
301 switch b := c.(type) {
302 case provider.ToolCallBlock:
303 finalised[b.ID] = true
304 case provider.ToolResultBlock:
305 finalised[b.CallID] = true
306 }
307 }
308 }
309 for _, tc := range v.ToolCalls {
310 if finalised[tc.ID] {
311 continue
312 }
313 out = append(out, v.renderToolCall(tc, width)...)
314 out = append(out, "")
315 }
316 if v.Err != "" {
317 out = append(out, v.Theme.FG256(v.Theme.Error, "✖ "+v.Err))
318 out = append(out, "")
319 }
320 return out, anchors
321}
322
323// refreshToolPaths rebuilds the tool_use_id -> path map from the
324// current transcript. Called once per Build() so tool result blocks
325// (which may be cached) can look up their syntax language when they
326// were originally rendered. Walking the transcript here is O(N) but
327// cheap compared to markdown/chroma work it enables.
328func (v *View) refreshToolPaths() {
329 v.toolPaths = map[string]string{}
330 v.toolStartLines = map[string]int{}
331 v.toolCallLabels = map[string]string{}
332 for _, m := range v.Messages {
333 for _, c := range m.Content {
334 if tc, ok := c.(provider.ToolCallBlock); ok {
335 if p := pathFromToolArgs(tc.Arguments); p != "" {
336 v.toolPaths[tc.ID] = p
337 }
338 if off := offsetFromToolArgs(tc.Arguments); off >= 1 {
339 v.toolStartLines[tc.ID] = off
340 }
341 v.toolCallLabels[tc.ID] = tc.Name + " " + ShortArgs(tc.Name, tc.Arguments)
342 }
343 }
344 }
345}
346
347// renderMessageCached returns the rendered line slice for m, using the
348// cache if the same (content hash, width, expandAll) combination has
349// been rendered before. The slice returned is shared — callers must
350// not mutate it; Build() only ever appends to its own `out` so the
351// shared slice is safe.
352func (v *View) renderMessageCached(m provider.Message, width int, turnOpen bool) []string {
353 key := msgCacheKey{
354 hash: hashMessage(m),
355 width: width,
356 expandAll: v.ExpandAll,
357 turnOpen: turnOpen,
358 }
359 if v.renderCache != nil {
360 if lines, ok := v.renderCache[key]; ok {
361 return lines
362 }
363 }
364 lines := v.renderMessage(m, width, turnOpen)
365 if v.renderCache != nil {
366 // Bound the cache: 4x the current message count is enough to
367 // survive /compact churn without leaking memory across a very
368 // long session.
369 max := len(v.Messages) * 4
370 if max < 32 {
371 max = 32
372 }
373 if len(v.renderCache) > max {
374 // Drop half the entries. map iteration order gives us a
375 // pseudo-LRU for free.
376 dropped := 0
377 target := len(v.renderCache) / 2
378 for k := range v.renderCache {
379 if dropped >= target {
380 break
381 }
382 delete(v.renderCache, k)
383 dropped++
384 }
385 }
386 v.renderCache[key] = lines
387 }
388 return lines
389}
390
391// hashMessage returns a 64-bit FNV-1a over the role + content blocks
392// of m. Serialising each block to its salient bytes is enough: two
393// messages with the same role and same content render identically.
394func hashMessage(m provider.Message) uint64 {
395 h := fnv64aInit
396 h = fnv64aWrite(h, []byte(m.Role))
397 h = fnv64aWriteByte(h, 0)
398 for _, c := range m.Content {
399 switch b := c.(type) {
400 case provider.TextBlock:
401 h = fnv64aWriteByte(h, 't')
402 h = fnv64aWrite(h, []byte(b.Text))
403 case provider.ImageBlock:
404 h = fnv64aWriteByte(h, 'i')
405 h = fnv64aWrite(h, []byte(b.MimeType))
406 h = fnv64aWrite(h, b.Data)
407 case provider.ToolCallBlock:
408 h = fnv64aWriteByte(h, 'c')
409 h = fnv64aWrite(h, []byte(b.ID))
410 h = fnv64aWrite(h, []byte(b.Name))
411 h = fnv64aWrite(h, []byte(b.Arguments))
412 case provider.ToolResultBlock:
413 h = fnv64aWriteByte(h, 'r')
414 h = fnv64aWrite(h, []byte(b.CallID))
415 if b.IsError {
416 h = fnv64aWriteByte(h, 'E')
417 }
418 for _, inner := range b.Content {
419 switch ib := inner.(type) {
420 case provider.TextBlock:
421 h = fnv64aWrite(h, []byte(ib.Text))
422 case provider.ImageBlock:
423 h = fnv64aWrite(h, []byte(ib.MimeType))
424 h = fnv64aWrite(h, ib.Data)
425 }
426 }
427 }
428 h = fnv64aWriteByte(h, 0)
429 }
430 return h
431}
432
433// FNV-1a implementation inlined so we don't pay the interface cost of
434// hash.Hash64 on every Build(). The whole point here is speed.
435const (
436 fnv64aInit uint64 = 0xcbf29ce484222325
437 fnv64aPrime uint64 = 0x100000001b3
438)
439
440// assistantBodyRightPad is the blank gutter kept on the right
441// side of every assistant prose line so text doesn't kiss the
442// terminal edge. Matches the 4-cell left indent, so a line of
443// fully-wrapped prose sits in a symmetric column.
444const assistantBodyRightPad = 4
445
446// assistantBodyWidth returns the usable width for the assistant
447// message body (markdown prose + code fences). Uses the full
448// column width passed in minus assistantBodyRightPad, clamped
449// at 1 so wrap helpers don't divide by zero on absurdly narrow
450// terminals. The right-side padding keeps a small breathing
451// column to the terminal edge that mirrors the left indent.
452func assistantBodyWidth(outer int) int {
453 outer -= assistantBodyRightPad
454 if outer < 1 {
455 return 1
456 }
457 return outer
458}
459
460func fnv64aWriteByte(h uint64, b byte) uint64 {
461 h ^= uint64(b)
462 h *= fnv64aPrime
463 return h
464}
465
466func fnv64aWrite(h uint64, p []byte) uint64 {
467 for _, b := range p {
468 h ^= uint64(b)
469 h *= fnv64aPrime
470 }
471 return h
472}
473
474func (v *View) renderMessage(m provider.Message, width int, turnOpen bool) []string {
475 var lines []string
476
477 // Compaction summary: render as a single muted line at the end
478 // of the chat instead of as a user message.
479 if m.Meta["compaction"] == "true" {
480 if v.ExpandAll {
481 return v.renderCompactionBlock(m, width)
482 }
483 // Collapsed: skip entirely. The status bar shows the info.
484 return nil
485 }
486
487 switch m.Role {
488 case provider.RoleUser:
489 header := v.Theme.FG256(v.Theme.User, "▍ you")
490 lines = append(lines, header)
491 for _, c := range m.Content {
492 switch b := c.(type) {
493 case provider.TextBlock:
494 for _, l := range strings.Split(b.Text, "\n") {
495 for _, w := range wrapLine(l, width-4, "") {
496 lines = append(lines, " "+v.Theme.FG256(v.Theme.Muted, w))
497 }
498 }
499 case provider.ImageBlock:
500 lines = append(lines, " "+v.Theme.FG256(v.Theme.Muted, fmt.Sprintf("[image %s, %d bytes]", b.MimeType, len(b.Data))))
501 }
502 }
503 case provider.RoleAssistant:
504 // Only draw the agent header at the start of a turn. Mid-turn
505 // assistant messages (e.g. another tool_use round-trip after a
506 // tool result) reuse the header that's already on screen.
507 if !turnOpen {
508 lines = append(lines, v.Theme.FG256(v.Theme.Assistant, "▍ zot"))
509 }
510 // Indent assistant body the same 4 cells the user body uses,
511 // so the conversation column lines up vertically. The width
512 // passed into the markdown renderer / wrap is reduced by the
513 // indent so long lines wrap inside the indented column, and
514 // capped so ultra-wide terminals don't produce edge-to-edge
515 // code-fence rules or unreadably long prose lines.
516 const indent = " "
517 inner := assistantBodyWidth(width - len(indent))
518 for _, c := range m.Content {
519 switch b := c.(type) {
520 case provider.TextBlock:
521 md := RenderMarkdown(strings.TrimLeft(b.Text, "\n"), v.Theme, inner)
522 for _, l := range strings.Split(md, "\n") {
523 for _, w := range wrapANSILine(l, inner) {
524 lines = append(lines, indent+w)
525 }
526 }
527 case provider.ToolCallBlock:
528 // The whole box (top + body + bottom) is rendered by
529 // the matching tool_result message so a single
530 // assistant message that batches multiple tool_use
531 // blocks doesn't produce a stack of unclosed top
532 // edges. Each tool result owns its own box.
533 _ = b
534 }
535 }
536 case provider.RoleTool:
537 for _, c := range m.Content {
538 if tr, ok := c.(provider.ToolResultBlock); ok {
539 color := v.Theme.ToolOut
540 if tr.IsError {
541 color = v.Theme.Error
542 }
543 path := ""
544 if v.toolPaths != nil {
545 path = v.toolPaths[tr.CallID]
546 }
547 startLine := 1
548 if v.toolStartLines != nil {
549 if s := v.toolStartLines[tr.CallID]; s > 0 {
550 startLine = s
551 }
552 }
553 label := ""
554 if v.toolCallLabels != nil {
555 label = v.toolCallLabels[tr.CallID]
556 }
557 // Each tool result owns a complete box: top edge with
558 // the call's label, body rows wrapped in vertical
559 // edges, bottom edge to close. The label is looked up
560 // from the matching ToolCallBlock so multiple calls
561 // in one assistant message render as N adjacent boxes
562 // instead of stacking unclosed top edges.
563 lines = append(lines, toolBoxTop(v.Theme, label, width))
564 if tr.IsError {
565 lines = append(lines, toolBoxSide(v.Theme, v.Theme.FG256(color, " error"), width))
566 }
567 for _, body := range v.renderToolResultContent(tr.Content, width, color, path, startLine) {
568 // Image escapes paint into a graphics layer that
569 // doesn't share the text grid; wrapping such a row
570 // in │ … │ produces visible artefacts on iTerm /
571 // Kitty, so leave image rows un-bordered. The
572 // surrounding lines still close the box top + bottom.
573 if hasImageEscapeLine(body) {
574 lines = append(lines, body)
575 continue
576 }
577 lines = append(lines, toolBoxSide(v.Theme, body, width))
578 }
579 lines = append(lines, toolBoxBottom(v.Theme, width))
580 }
581 }
582 }
583 return lines
584}
585
586func (v *View) renderToolCall(tc ToolCallView, width int) []string {
587 var lines []string
588
589 // Header label. While the call is still streaming, prefer the
590 // live path extracted from the partial args so the user sees
591 // the target file as soon as it's known, even before the full
592 // JSON arrived.
593 arg := tc.Args
594 if arg == "" && tc.LivePath != "" {
595 arg = tc.LivePath
596 }
597 label := tc.Name + " " + arg
598
599 // Every box is preceded by a blank line so it doesn't sit
600 // flush against the prose / previous tool block above it.
601 // Matches the transcript-side framing in renderMessage.
602
603 // Streaming body (write/edit): top edge with the label, body
604 // rows wrapped with vertical edges, bottom edge to close the
605 // box. When the call finalises, the live overlay disappears
606 // the same frame the transcript renders the closed box, so
607 // there's no visible hop.
608 if tc.Streaming && tc.Result == "" {
609 lines = append(lines, "")
610 lines = append(lines, toolBoxTop(v.Theme, label, width))
611 if body := v.renderLiveToolBody(tc, width); len(body) > 0 {
612 lines = append(lines, body...)
613 }
614 lines = append(lines, toolBoxBottom(v.Theme, width))
615 return lines
616 }
617
618 // Finished tool call with no body: just the labelled top edge
619 // directly closed by the bottom. Avoids a blank interior row
620 // for no-output tools.
621 if tc.Result == "" {
622 lines = append(lines, "")
623 lines = append(lines, toolBoxTop(v.Theme, label, width))
624 lines = append(lines, toolBoxBottom(v.Theme, width))
625 return lines
626 }
627
628 // Finished tool call with a result body. Top edge embeds the
629 // label; body lines go through toolBoxSide so each row gets
630 // vertical edges; bottom edge closes the box.
631 lines = append(lines, "")
632 lines = append(lines, toolBoxTop(v.Theme, label, width))
633 color := v.Theme.ToolOut
634 if tc.Error {
635 color = v.Theme.Error
636 }
637 body := toolResultBlock(v.Theme, tc.Result, width, color)
638 for _, l := range v.collapseToolBody(body, false) {
639 if hasImageEscapeLine(l) {
640 lines = append(lines, l)
641 continue
642 }
643 lines = append(lines, toolBoxSide(v.Theme, l, width))
644 }
645 lines = append(lines, toolBoxBottom(v.Theme, width))
646 return lines
647}
648
649// renderLiveToolBody renders the in-flight preview of a streaming
650// tool call. Supported tools:
651//
652// - write: shows the partial `content` field, syntax-highlighted
653// by the target path's language.
654// - edit: shows the partial `newText` of the edit currently being
655// streamed, prefixed with a "editing foo.ts (edit 2)" header so
656// the user can see which of a multi-edit batch is in progress.
657//
658// Anything else returns nil and only the tool-call header shows.
659func (v *View) renderLiveToolBody(tc ToolCallView, width int) []string {
660 switch tc.Name {
661 case "write", "Write":
662 partial, ok, _ := ExtractPartialStringField(tc.RawJSONBuf, "content")
663 if !ok || partial == "" {
664 return nil
665 }
666 return v.wrapLiveBody(v.renderRawFile(partial, tc.LivePath, 1), width)
667 case "edit", "Edit":
668 partial, ok, _, idx := ExtractLastNewText(tc.RawJSONBuf)
669 if !ok || partial == "" {
670 return nil
671 }
672 // Header line hints which edit is streaming and, when more
673 // than one has landed, how many the model is doing.
674 hint := fmt.Sprintf("edit %d (streaming)", idx)
675 body := []string{" " + v.Theme.FG256(v.Theme.Muted, hint), ""}
676 body = append(body, v.renderRawFile(partial, tc.LivePath, 1)...)
677 return v.wrapLiveBody(body, width)
678 }
679 return nil
680}
681
682// wrapLiveBody returns the streaming body content as a list of
683// box-side rows: each line wrapped in │ … │ with right padding so
684// the closing edge sits at column width-1. The caller (renderToolCall)
685// supplies the surrounding top/bottom edges so the live overlay
686// renders as a closed box matching the finalised transcript form.
687func (v *View) wrapLiveBody(body []string, width int) []string {
688 body = v.collapseToolBody(body, false)
689 out := make([]string, 0, len(body))
690 for _, l := range body {
691 if hasImageEscapeLine(l) {
692 out = append(out, l)
693 continue
694 }
695 out = append(out, toolBoxSide(v.Theme, l, width))
696 }
697 return out
698}
699
700// toolResultBlock wraps text in thin horizontal rules (top + bottom),
701// indenting the body with four spaces. The rules span the content column.
702// toolBlockRule renders the muted horizontal separator drawn
703// above and below a tool call block. Spans the full content
704// width so it reads as a real section break in the chat
705// regardless of terminal size.
706func toolBlockRule(th Theme, width int) string {
707 w := width
708 if w < 8 {
709 w = 8
710 }
711 return th.FG256(th.Muted, strings.Repeat("─", w))
712}
713
714// toolBoxInnerPad is the number of blank cells kept between a box
715// edge (┌, │, └) and the content inside it. One cell of breathing
716// room makes the label read as part of the box rather than fused to
717// the corner, and gives body lines a tiny gutter from the left side.
718const toolBoxInnerPad = 1
719
720// toolBoxTop renders the labelled top edge of a tool block:
721//
722// ┌─ bash xcrun simctl list devices ─────────────────────────────┐
723//
724// The label is the tool name + short args (the same string previously
725// shown on its own row beneath the rule). Padding fills the remainder
726// of the line so the right corner sits at column width-1, matching the
727// closing edge.
728func toolBoxTop(th Theme, label string, width int) string {
729 w := width
730 if w < 12 {
731 w = 12
732 }
733 innerPad := strings.Repeat(" ", toolBoxInnerPad)
734 // "┌─" + innerPad + " " + label + " " + innerPad = used; pad
735 // with ─ to width-1, then "┐".
736 prefix := "┌─" + innerPad + " "
737 suffix := " " + innerPad
738 used := visibleWidth(prefix) + visibleWidth(label) + visibleWidth(suffix)
739 fill := w - used - 1 // -1 for the closing corner
740 if fill < 0 {
741 // Label overflows; truncate with an ellipsis so the right
742 // corner still lands on the right edge. Rare on real
743 // terminals (the chat column is usually wide enough).
744 over := -fill
745 runes := []rune(label)
746 if over+1 < len(runes) {
747 label = string(runes[:len(runes)-over-1]) + "…"
748 } else {
749 label = "…"
750 }
751 used = visibleWidth(prefix) + visibleWidth(label) + visibleWidth(suffix)
752 fill = w - used - 1
753 if fill < 0 {
754 fill = 0
755 }
756 }
757 line := prefix + label + suffix + strings.Repeat("─", fill) + "┐"
758 return th.FG256(th.Muted, line)
759}
760
761// toolBoxBottom renders the bottom edge of a tool block:
762//
763// └─────────────────────────────────────────────────────────────────────────────┘
764//
765// Spans the same width as toolBoxTop so the corners line up.
766func toolBoxBottom(th Theme, width int) string {
767 w := width
768 if w < 12 {
769 w = 12
770 }
771 line := "└" + strings.Repeat("─", w-2) + "┘"
772 return th.FG256(th.Muted, line)
773}
774
775// hasImageEscapeLine reports whether s contains a Kitty (\x1b_G) or
776// iTerm2 (\x1b]1337;File=) inline-image escape. Such rows draw into
777// the terminal's graphics layer and shouldn't be wrapped with text
778// box edges.
779func hasImageEscapeLine(s string) bool {
780 return strings.Contains(s, "\x1b]1337;File=") || strings.Contains(s, "\x1b_G")
781}
782
783// toolBoxBodyTrimLeft is the number of leading literal spaces stripped
784// from each body line as it enters toolBoxSide. Body renderers
785// (renderToolText, renderRawFile, the diff/bash helpers, ...) all
786// emit a 4-cell indent so the content aligns with the assistant body
787// column when there's no box around it. Inside a box the box edge +
788// inner pad already supply most of that gutter, so we drop a couple
789// of cells from the body's own indent to keep the content from
790// drifting too far right.
791const toolBoxBodyTrimLeft = 2
792
793// toolBoxSide wraps a single body line with vertical box edges:
794//
795// │ foo bar baz │
796//
797// The middle preserves the line verbatim (including any ANSI escapes)
798// after stripping toolBoxBodyTrimLeft leading literal spaces. One cell
799// of inner padding sits on each side so the content breathes from the
800// edges; the right padding fills to column width-1.
801func toolBoxSide(th Theme, line string, width int) string {
802 w := width
803 if w < 12 {
804 w = 12
805 }
806 left := th.FG256(th.Muted, "│") + strings.Repeat(" ", toolBoxInnerPad)
807 right := strings.Repeat(" ", toolBoxInnerPad) + th.FG256(th.Muted, "│")
808 inner := w - 2 - 2*toolBoxInnerPad // available between the two pads
809 line = trimLeadingSpaces(line, toolBoxBodyTrimLeft)
810 cur := visibleWidth(line)
811 if cur > inner {
812 // Last-resort truncation. Strips ANSI styling at the cut
813 // point; rare path so the simpler implementation is fine.
814 line = stripANSI(line)
815 runes := []rune(line)
816 if len(runes) > inner {
817 line = string(runes[:inner])
818 }
819 cur = visibleWidth(line)
820 }
821 pad := inner - cur
822 if pad < 0 {
823 pad = 0
824 }
825 return left + line + strings.Repeat(" ", pad) + right
826}
827
828// trimLeadingSpaces removes up to n literal space characters from the
829// start of s without touching anything else. ANSI CSI escapes that
830// appear before the spaces are skipped over (so a coloured indent
831// like "\x1b[2m text" still loses its first n cells of indent).
832// Stops as soon as it hits a non-space character.
833func trimLeadingSpaces(s string, n int) string {
834 if n <= 0 || s == "" {
835 return s
836 }
837 var b strings.Builder
838 b.Grow(len(s))
839 trimmed := 0
840 i := 0
841 for i < len(s) {
842 // Pass through any ANSI escape sequence verbatim.
843 if s[i] == 0x1b && i+1 < len(s) && s[i+1] == '[' {
844 end := i + 2
845 for end < len(s) {
846 c := s[end]
847 end++
848 if c >= 0x40 && c <= 0x7e {
849 break
850 }
851 }
852 b.WriteString(s[i:end])
853 i = end
854 continue
855 }
856 if trimmed < n && s[i] == ' ' {
857 trimmed++
858 i++
859 continue
860 }
861 b.WriteString(s[i:])
862 return b.String()
863 }
864 return b.String()
865}
866
867// renderToolResultContent renders the body of a tool result block.
868// Text blocks get the usual rules-wrapped treatment; text that looks
869// like a unified diff gets +/- coloring. Image blocks are rendered
870// inline when the terminal supports a protocol, else as a text
871// placeholder with dimensions.
872func (v *View) renderToolResultContent(blocks []provider.Content, width, color int, sourcePath string, startLine int) []string {
873 var body []string
874 hasImage := false
875 for _, b := range blocks {
876 switch bb := b.(type) {
877 case provider.TextBlock:
878 body = append(body, v.renderToolText(bb.Text, width, color, sourcePath, startLine)...)
879 case provider.ImageBlock:
880 hasImage = true
881 body = append(body, v.renderImageBlock(bb, width)...)
882 }
883 }
884 return v.collapseToolBody(body, hasImage)
885}
886
887// collapseToolBody trims lines to the configured preview size when the
888// view is not in ExpandAll mode, appending a muted "... ctrl+o to
889// expand" footer. Image blocks never collapse — they're short in text
890// rows but represent real content the user wants to see.
891func (v *View) collapseToolBody(lines []string, hasImage bool) []string {
892 if v.ExpandAll || hasImage {
893 return lines
894 }
895 if len(lines) <= ToolCollapseLines {
896 return lines
897 }
898 kept := lines[:ToolCollapsePreview]
899 hidden := len(lines) - ToolCollapsePreview
900 total := len(lines)
901 footer := fmt.Sprintf(" ... (%d more lines, %d total, ctrl+o to expand)", hidden, total)
902 footer = v.Theme.FG256(v.Theme.Muted, footer)
903 return append(append([]string(nil), kept...), footer)
904}
905
906// renderToolText renders a text block inside a tool result. If the
907// text contains a unified-diff section (lines starting with "--- " /
908// "+++ " / "+" / "-"/" "), those rows are styled with add/remove
909// colors matching git diff conventions.
910func (v *View) renderToolText(text string, width, defaultColor int, sourcePath string, startLine int) []string {
911 // Legacy path: transcripts saved before we dropped line numbers
912 // from the read tool still carry " 1\t…" prefixes. Detect and
913 // strip them, then fall through to the highlighter.
914 if looksLikeNumberedFile(text) {
915 return v.renderNumberedFile(text, sourcePath)
916 }
917 // If the result embeds a unified diff (the edit tool's output
918 // starts with a short "applied N edit(s)" line and then a
919 // standard --- / +++ / +/- patch), render the patch with
920 // add/remove coloring. This takes priority over the file-like
921 // detector below because a diff technically has many lines of
922 // "file content" but what the user cares about is what changed,
923 // not a dump of the post-edit file.
924 if looksLikeUnifiedDiff(text) {
925 return v.renderUnifiedDiff(text, width, sourcePath)
926 }
927
928 // Current path: text came from `read` as raw file bytes. When a
929 // source path is known (the call had a `path` arg), render with
930 // a synthetic line-number gutter starting at startLine so the
931 // on-screen view still looks like cat -n. Doesn't apply to non-
932 // file tool outputs (bash stdout, display notes, etc.).
933 if sourcePath != "" && looksLikeFileContent(text) {
934 return v.renderRawFile(text, sourcePath, startLine)
935 }
936
937 // No truncation — the full tool output is rendered into chat and
938 // becomes part of the scrollback you can page back through.
939 lines := strings.Split(text, "\n")
940
941 // Bash-result styling: when the first row looks like a shell
942 // prompt line ("$ ...") emitted by the bash tool, style the
943 // prompt line in accent and the trailing "[exit N] Took X.Ys"
944 // line in muted type so the command + timing read at a glance.
945 // Everything between is left on the default tool-output color.
946 if len(lines) > 0 && strings.HasPrefix(lines[0], "$ ") {
947 return v.renderBashResult(lines, width, defaultColor)
948 }
949
950 inDiff := false
951 oldLine, newLine := 1, 1
952 var out []string
953 for _, l := range lines {
954 // Detect diff header: "--- name" followed somewhere by "+++ name".
955 if strings.HasPrefix(l, "--- ") || strings.HasPrefix(l, "+++ ") {
956 inDiff = true
957 out = append(out, " "+v.Theme.FG256(v.Theme.Muted, l))
958 continue
959 }
960 // Hunk header "@@ -a,b +c,d @@" resets the counters so patches
961 // that skip around in the file still get correct numbering.
962 if inDiff && strings.HasPrefix(l, "@@") {
963 if o, n, ok := parseHunkHeader(l); ok {
964 oldLine, newLine = o, n
965 }
966 out = append(out, " "+v.Theme.FG256(v.Theme.Muted, l))
967 continue
968 }
969 if inDiff && len(l) > 0 {
970 switch l[0] {
971 case '+':
972 out = append(out, v.renderDiffRow(l, width, v.Theme.Tool, newLine, '+', sourcePath))
973 newLine++
974 continue
975 case '-':
976 out = append(out, v.renderDiffRow(l, width, v.Theme.Error, oldLine, '-', sourcePath))
977 oldLine++
978 continue
979 case ' ':
980 out = append(out, v.renderDiffRow(l, width, v.Theme.Muted, newLine, ' ', sourcePath))
981 oldLine++
982 newLine++
983 continue
984 }
985 }
986 // Regular line.
987 for _, w := range wrapLine(l, width-4, " ") {
988 out = append(out, " "+v.Theme.FG256(defaultColor, w))
989 }
990 }
991 return out
992}
993
994// parseHunkHeader extracts the starting old/new line from a unified
995// diff hunk header ("@@ -12,5 +12,7 @@ ..."). Returns ok=false if the
996// header is malformed or missing numbers.
997func parseHunkHeader(l string) (oldStart, newStart int, ok bool) {
998 // Skip "@@ "
999 rest := strings.TrimPrefix(l, "@@")
1000 rest = strings.TrimSpace(rest)
1001 if !strings.HasPrefix(rest, "-") {
1002 return 0, 0, false
1003 }
1004 rest = rest[1:]
1005 space := strings.IndexByte(rest, ' ')
1006 if space < 0 {
1007 return 0, 0, false
1008 }
1009 oldPart := rest[:space]
1010 rest = strings.TrimSpace(rest[space+1:])
1011 if !strings.HasPrefix(rest, "+") {
1012 return 0, 0, false
1013 }
1014 rest = rest[1:]
1015 if sp := strings.IndexAny(rest, " \t"); sp >= 0 {
1016 rest = rest[:sp]
1017 }
1018 parseStart := func(s string) (int, bool) {
1019 if c := strings.IndexByte(s, ','); c >= 0 {
1020 s = s[:c]
1021 }
1022 n, err := strconv.Atoi(s)
1023 if err != nil || n < 1 {
1024 return 0, false
1025 }
1026 return n, true
1027 }
1028 o, ok1 := parseStart(oldPart)
1029 n, ok2 := parseStart(rest)
1030 if !ok1 || !ok2 {
1031 return 0, 0, false
1032 }
1033 return o, n, true
1034}
1035
1036// renderDiffRow renders one unified-diff line with a read-style gutter
1037// (6-cell right-aligned line number, muted) followed by the +/-/space
1038// marker and the code. Code is syntax-highlighted if sourcePath hints
1039// at a known language; falls back to the plain diff color otherwise.
1040func (v *View) renderDiffRow(line string, width, color int, lineNo int, mark byte, sourcePath string) string {
1041 if len(line) == 0 {
1042 return ""
1043 }
1044 code := expandTabs(line[1:]) // strip the leading marker; expand tabs
1045
1046 // Syntax-highlight the code half when we know the language. Use
1047 // the same HighlightCode pipeline as renderNumberedFile so the
1048 // palette matches.
1049 lang := LanguageFromPath(sourcePath)
1050 var codeRendered string
1051 if lang != "" {
1052 if h := HighlightCode(code, lang); len(h) == 1 {
1053 codeRendered = h[0]
1054 }
1055 }
1056 if codeRendered == "" {
1057 if mark == ' ' {
1058 codeRendered = v.Theme.FG256(v.Theme.Muted, code)
1059 } else {
1060 codeRendered = v.Theme.FG256(color, code)
1061 }
1062 }
1063
1064 // Gutter shape: sign + number share a color so they read as one
1065 // visual token ("+123") instead of a neutral line number next to
1066 // a stray marker. Unchanged context lines get a muted gutter and
1067 // a leading space so column alignment stays consistent with +/-
1068 // rows.
1069 var gutterText string
1070 switch mark {
1071 case '+':
1072 gutterText = fmt.Sprintf("+%3d ", lineNo)
1073 case '-':
1074 gutterText = fmt.Sprintf("-%3d ", lineNo)
1075 default:
1076 gutterText = fmt.Sprintf(" %3d ", lineNo)
1077 }
1078 var gutter string
1079 if mark == ' ' {
1080 gutter = v.Theme.FG256(v.Theme.Muted, gutterText)
1081 } else {
1082 gutter = v.Theme.FG256(color, gutterText)
1083 }
1084 row := " " + gutter + codeRendered
1085
1086 // Cheap width clamp: truncate visible text if the raw code is too
1087 // long. We work on the pre-ANSI code string because measuring ansi
1088 // output is unreliable.
1089 maxCode := width - 4 /* indent */ - 7 /* gutter (sign+5 digits+tab) */
1090 if maxCode > 0 && len(code) > maxCode {
1091 trunc := code[:maxCode-1] + "…"
1092 if lang != "" {
1093 if h := HighlightCode(trunc, lang); len(h) == 1 {
1094 codeRendered = h[0]
1095 } else if mark == ' ' {
1096 codeRendered = v.Theme.FG256(v.Theme.Muted, trunc)
1097 } else {
1098 codeRendered = v.Theme.FG256(color, trunc)
1099 }
1100 } else if mark == ' ' {
1101 codeRendered = v.Theme.FG256(v.Theme.Muted, trunc)
1102 } else {
1103 codeRendered = v.Theme.FG256(color, trunc)
1104 }
1105 row = " " + gutter + codeRendered
1106 }
1107 return row
1108}
1109
1110// renderImageBlock returns the lines for one image, inline if possible.
1111//
1112// Inline image escapes paint into multiple terminal rows but the zot
1113// renderer treats each slice entry as a single row. To prevent chat
1114// content from being drawn on top of the image, we pad with blank rows
1115// so the image's real footprint is reflected in the frame height.
1116func (v *View) renderImageBlock(b provider.ImageBlock, width int) []string {
1117 w, h := ImageDimensions(b.Data)
1118 kb := len(b.Data) / 1024
1119 // Four-space indent matches every other tool-output row
1120 // (renderRawFile, renderBashResult, diff rows, "... N more
1121 // lines" footers). Keeps the image's metadata line vertically
1122 // aligned with the file content above / below it.
1123 info := fmt.Sprintf(" image - %s - %dx%d - %d KB", b.MimeType, w, h, kb)
1124
1125 if v.ImageProto != ImageProtocolNone {
1126 // Clamp rendered width so the image never overflows the chat
1127 // column. Subtract a 4-cell indent for the tool result block,
1128 // cap at 60 cells, floor at 10.
1129 cells := width - 4
1130 if cells > 60 {
1131 cells = 60
1132 }
1133 if cells < 10 {
1134 cells = 10
1135 }
1136 const maxRows = 20
1137 if seq := RenderInlineImageScaled(v.ImageProto, b.Data, b.MimeType, cells, maxRows); seq != "" {
1138 rows := RowsForInlineImage(b.Data, cells, maxRows)
1139 if rows < 1 {
1140 rows = 1
1141 }
1142 // Reserve the image footprint first, then place the escape
1143 // in the top-left of that blank rectangle. Keeping the
1144 // metadata above the image made some terminals blend text and
1145 // graphics layers during full-screen repaints; metadata below
1146 // the reserved rectangle is more stable and easier to read.
1147 out := make([]string, 0, rows+3)
1148 out = append(out, " "+seq)
1149 for i := 1; i < rows; i++ {
1150 out = append(out, "")
1151 }
1152 out = append(out, v.Theme.FG256(v.Theme.Muted, info))
1153 return out
1154 }
1155 }
1156 return []string{v.Theme.FG256(v.Theme.Muted, info)}
1157}
1158
1159// looksLikeNumberedFile returns true when text matches the `read`
1160// tool's " N\tcontent" format for most of its lines.
1161func looksLikeNumberedFile(text string) bool {
1162 lines := strings.Split(text, "\n")
1163 if len(lines) == 0 {
1164 return false
1165 }
1166 hits := 0
1167 scanned := 0
1168 for _, l := range lines {
1169 if l == "" {
1170 continue
1171 }
1172 scanned++
1173 if scanned > 20 {
1174 break
1175 }
1176 if numberedLineRE.MatchString(l) {
1177 hits++
1178 }
1179 }
1180 if scanned == 0 {
1181 return false
1182 }
1183 return hits*2 >= scanned // majority of non-empty lines match
1184}
1185
1186var numberedLineRE = regexp.MustCompile(`^\s*\d+\t`)
1187
1188// renderNumberedFile strips line numbers, highlights the code, and
1189// re-attaches the line numbers in muted color.
1190func (v *View) renderNumberedFile(text, sourcePath string) []string {
1191 lines := strings.Split(text, "\n")
1192 gutters := make([]string, 0, len(lines))
1193 codes := make([]string, 0, len(lines))
1194 for _, l := range lines {
1195 idx := strings.IndexByte(l, '\t')
1196 if idx < 0 || !numberedLineRE.MatchString(l) {
1197 // Non-code footer (e.g. "[truncated at 2000 lines]").
1198 gutters = append(gutters, "")
1199 codes = append(codes, l)
1200 continue
1201 }
1202 gutter := l[:idx] + " " // replace tab with single space
1203 code := expandTabs(l[idx+1:])
1204 gutters = append(gutters, gutter)
1205 codes = append(codes, code)
1206 }
1207 lang := LanguageFromPath(sourcePath)
1208 var highlighted []string
1209 if lang != "" {
1210 highlighted = HighlightCode(strings.Join(codes, "\n"), lang)
1211 // Chroma sometimes collapses the trailing empty line. Pad to
1212 // align with the gutter slice so per-line zipping works.
1213 for len(highlighted) < len(codes) {
1214 highlighted = append(highlighted, "")
1215 }
1216 if len(highlighted) > len(codes) {
1217 highlighted = highlighted[:len(codes)]
1218 }
1219 } else {
1220 // No lexer for this file type — render in the ToolOut color so
1221 // code is visually distinct from the muted gutter.
1222 highlighted = make([]string, len(codes))
1223 for i, c := range codes {
1224 highlighted[i] = v.Theme.FG256(v.Theme.ToolOut, c)
1225 }
1226 }
1227 out := make([]string, 0, len(codes))
1228 for i, code := range highlighted {
1229 g := gutters[i]
1230 if g == "" {
1231 out = append(out, " "+v.Theme.FG256(v.Theme.Muted, code))
1232 continue
1233 }
1234 out = append(out, " "+v.Theme.FG256(v.Theme.Muted, g)+code)
1235 }
1236 return out
1237}
1238
1239// looksLikeFileContent is a cheap guard to distinguish a read-tool
1240// result from bash stdout or a status message. File content usually
1241// contains characters that status messages don't (code punctuation,
1242// longer lines, multiple lines) and rarely starts with the " >"-
1243// or "error:"-style prefixes tools emit. False positives are OK,
1244// the worst case is a line-number gutter on something that isn't
1245// really code.
1246// renderBashResult styles a bash tool result: the "$ command" first
1247// line in the accent color, the trailing "[exit N] Took X.Ys" line
1248// in muted type, everything else on the default tool-output color.
1249// Called from renderToolText when the first line starts with "$ ".
1250func (v *View) renderBashResult(lines []string, width, defaultColor int) []string {
1251 // Identify the footer line (exit + timing). The bash tool writes
1252 // it as the last non-empty line of the result.
1253 footerIdx := -1
1254 for i := len(lines) - 1; i >= 0; i-- {
1255 trimmed := strings.TrimSpace(lines[i])
1256 if trimmed == "" {
1257 continue
1258 }
1259 if strings.HasPrefix(trimmed, "[exit ") {
1260 footerIdx = i
1261 }
1262 break
1263 }
1264
1265 var out []string
1266 for i, l := range lines {
1267 switch {
1268 case i == 0 && strings.HasPrefix(l, "$ "):
1269 // Style the $ and the command text in accent. No
1270 // further processing / wrapping so the shell-style
1271 // prompt reads at a glance.
1272 for _, w := range wrapLine(l, width-4, " ") {
1273 out = append(out, " "+v.Theme.FG256(v.Theme.Accent, w))
1274 }
1275 case i == footerIdx:
1276 out = append(out, " "+v.Theme.FG256(v.Theme.Muted, l))
1277 default:
1278 for _, w := range wrapLine(l, width-4, " ") {
1279 out = append(out, " "+v.Theme.FG256(defaultColor, w))
1280 }
1281 }
1282 }
1283 return out
1284}
1285
1286// looksLikeUnifiedDiff reports whether text is a context diff as
1287// emitted by the edit tool: rows start with '+', '-', ' ', or
1288// literal "..." (context-break marker). The presence of at least
1289// one '+' or '-' row distinguishes a real diff from an ordinary
1290// file whose lines happen to begin with a space.
1291func looksLikeUnifiedDiff(text string) bool {
1292 lines := strings.Split(text, "\n")
1293 if len(lines) < 2 {
1294 return false
1295 }
1296 sawChange := false
1297 for _, l := range lines {
1298 if l == "" {
1299 continue
1300 }
1301 if l == "..." {
1302 continue
1303 }
1304 switch l[0] {
1305 case '+', '-':
1306 sawChange = true
1307 case ' ':
1308 // context, ok
1309 default:
1310 return false
1311 }
1312 }
1313 return sawChange
1314}
1315
1316// renderUnifiedDiff renders the edit tool's context diff. Each
1317// kept row shows a line-number gutter plus a marker column: '+'
1318// for additions (colored like add), '-' for deletions (colored
1319// like remove), and unmarked context in muted type. A literal
1320// "..." line between hunks renders as an ellipsis in muted type,
1321// indicating skipped unchanged rows. The old and new line
1322// counters advance so each row carries its actual position in
1323// the pre- or post-edit file. Heuristic: when we hit a "...", we
1324// can't know where the next hunk starts, so we don't reset the
1325// counters — they stay approximate in the rare multi-hunk case.
1326func (v *View) renderUnifiedDiff(text string, width int, sourcePath string) []string {
1327 lines := strings.Split(text, "\n")
1328 if n := len(lines); n > 0 && lines[n-1] == "" {
1329 lines = lines[:n-1]
1330 }
1331 oldLine, newLine := 1, 1
1332 var out []string
1333 for _, l := range lines {
1334 if l == "" {
1335 out = append(out, "")
1336 continue
1337 }
1338 if l == "..." {
1339 out = append(out, " "+v.Theme.FG256(v.Theme.Muted, "…"))
1340 continue
1341 }
1342 switch l[0] {
1343 case '+':
1344 out = append(out, v.renderDiffRow(l, width, v.Theme.Tool, newLine, '+', sourcePath))
1345 newLine++
1346 case '-':
1347 out = append(out, v.renderDiffRow(l, width, v.Theme.Error, oldLine, '-', sourcePath))
1348 oldLine++
1349 case ' ':
1350 out = append(out, v.renderDiffRow(l, width, v.Theme.Muted, newLine, ' ', sourcePath))
1351 oldLine++
1352 newLine++
1353 default:
1354 for _, w := range wrapLine(l, width-4, " ") {
1355 out = append(out, " "+v.Theme.FG256(v.Theme.Muted, w))
1356 }
1357 }
1358 }
1359 return out
1360}
1361
1362func looksLikeFileContent(text string) bool {
1363 if strings.TrimSpace(text) == "" {
1364 return false
1365 }
1366 lines := strings.Split(text, "\n")
1367 return len(lines) >= 2
1368}
1369
1370// renderRawFile renders file content received without embedded line
1371// numbers (the current read-tool output). Draws a muted gutter like
1372// "%6d \t" starting at startLine, highlights the code using the
1373// source path's language, and returns the formatted lines.
1374func (v *View) renderRawFile(text, sourcePath string, startLine int) []string {
1375 lines := strings.Split(text, "\n")
1376 // Drop the trailing empty line that Split produces when text ends
1377 // in "\n" so the gutter doesn't show a phantom last number.
1378 if n := len(lines); n > 0 && lines[n-1] == "" {
1379 lines = lines[:n-1]
1380 }
1381 // Split code from trailing footer lines ("... [truncated ...]")
1382 // so we don't number the footer.
1383 codeEnd := len(lines)
1384 for i := len(lines) - 1; i >= 0; i-- {
1385 if strings.HasPrefix(lines[i], "...") {
1386 codeEnd = i
1387 continue
1388 }
1389 break
1390 }
1391 code := lines[:codeEnd]
1392 footer := lines[codeEnd:]
1393
1394 // Expand tabs to 4 spaces so Go / Makefile code renders
1395 // at a consistent width.
1396 for i, c := range code {
1397 code[i] = expandTabs(c)
1398 }
1399
1400 lang := LanguageFromPath(sourcePath)
1401 var highlighted []string
1402 if lang != "" {
1403 highlighted = HighlightCode(strings.Join(code, "\n"), lang)
1404 for len(highlighted) < len(code) {
1405 highlighted = append(highlighted, "")
1406 }
1407 if len(highlighted) > len(code) {
1408 highlighted = highlighted[:len(code)]
1409 }
1410 } else {
1411 highlighted = make([]string, len(code))
1412 for i, c := range code {
1413 highlighted[i] = v.Theme.FG256(v.Theme.ToolOut, c)
1414 }
1415 }
1416
1417 out := make([]string, 0, len(lines))
1418 for i, c := range highlighted {
1419 gutter := fmt.Sprintf("%4d ", startLine+i)
1420 out = append(out, " "+v.Theme.FG256(v.Theme.Muted, gutter)+c)
1421 }
1422 for _, f := range footer {
1423 out = append(out, " "+v.Theme.FG256(v.Theme.Muted, f))
1424 }
1425 return out
1426}
1427
1428// toolResultBlock renders the live tool-call result body (shown
1429// while the turn is still in flight). The rules that used to
1430// bracket this block have been dropped so the live path looks
1431// identical to the transcript rendering that replaces it when
1432// the turn ends.
1433func toolResultBlock(th Theme, text string, width int, color int) []string {
1434 var out []string
1435 for _, l := range strings.Split(text, "\n") {
1436 for _, w := range wrapLine(l, width-4, " ") {
1437 out = append(out, " "+th.FG256(color, w))
1438 }
1439 }
1440 return out
1441}
1442
1443// ShortArgs renders a tool call's arguments into a one-line
1444// suffix for the "tool name <args>" header. tool is the tool
1445// name so we can add shape-specific decorations: for read we
1446// append the requested line range (e.g. "path:1-200") pulled
1447// from the offset/limit args, which is useful context at a
1448// glance without expanding the result body. Other tools keep
1449// the legacy "path or command, truncated at 60 cells" shape.
1450//
1451// Exported because the interactive mode pre-populates the
1452// ToolCallView.Args field with this value as soon as the tool
1453// call is announced, so the live overlay's header matches what
1454// the finalised transcript will later render.
1455func ShortArgs(tool string, raw json.RawMessage) string {
1456 var v any
1457 if err := json.Unmarshal(raw, &v); err != nil {
1458 return ""
1459 }
1460 x, ok := v.(map[string]any)
1461 if !ok {
1462 b, _ := json.Marshal(v)
1463 s := string(b)
1464 if len(s) > 60 {
1465 s = s[:57] + "..."
1466 }
1467 return s
1468 }
1469 var primary string
1470 for _, k := range []string{"path", "file_path", "command"} {
1471 if s, ok := x[k].(string); ok {
1472 primary = s
1473 break
1474 }
1475 }
1476 if primary == "" {
1477 b, _ := json.Marshal(v)
1478 s := string(b)
1479 if len(s) > 60 {
1480 s = s[:57] + "..."
1481 }
1482 return s
1483 }
1484
1485 // Tool-specific decoration. Only the read tool gets a range
1486 // suffix for now; other tools just truncate the primary arg.
1487 suffix := ""
1488 switch strings.ToLower(tool) {
1489 case "read":
1490 start := 1
1491 if n, ok := toInt(x["offset"]); ok && n >= 1 {
1492 start = n
1493 }
1494 if lim, ok := toInt(x["limit"]); ok && lim > 0 {
1495 end := start + lim - 1
1496 suffix = fmt.Sprintf(":%d-%d", start, end)
1497 } else if start > 1 {
1498 suffix = fmt.Sprintf(":%d-", start)
1499 }
1500 }
1501
1502 // Truncate the primary arg leaving room for the suffix so the
1503 // range stays visible even on absurdly long paths.
1504 max := 60 - len(suffix)
1505 if max < 10 {
1506 max = 10
1507 }
1508 if len(primary) > max {
1509 primary = primary[:max-3] + "..."
1510 }
1511 return primary + suffix
1512}
1513
1514// toInt coerces a json.Unmarshal'd number (float64) or a string
1515// containing a number into an int. Returns ok=false if the value
1516// is neither. Used by shortArgs to survive model quirks where
1517// numeric args come back as strings.
1518func toInt(v any) (int, bool) {
1519 switch n := v.(type) {
1520 case float64:
1521 return int(n), true
1522 case int:
1523 return n, true
1524 case string:
1525 i, err := strconv.Atoi(strings.TrimSpace(n))
1526 if err != nil {
1527 return 0, false
1528 }
1529 return i, true
1530 }
1531 return 0, false
1532}
1533
1534func collectText(blocks []provider.Content) string {
1535 var sb strings.Builder
1536 for _, b := range blocks {
1537 if tb, ok := b.(provider.TextBlock); ok {
1538 if sb.Len() > 0 {
1539 sb.WriteString("\n")
1540 }
1541 sb.WriteString(tb.Text)
1542 }
1543 }
1544 return sb.String()
1545}
1546
1547func truncateLines(s string, n int) string {
1548 lines := strings.Split(s, "\n")
1549 if len(lines) <= n {
1550 return s
1551 }
1552 return strings.Join(lines[:n], "\n") + "\n … (" + fmt.Sprintf("%d", len(lines)-n) + " more)"
1553}
1554
1555// renderCompactionBlock renders a compaction summary as a distinct
1556// visual block in the chat. When collapsed it shows a one-line label
1557// with the pre-compaction token count; when expanded (ctrl+o) it
1558// shows the full summary text.
1559func (v *View) renderCompactionBlock(m provider.Message, width int) []string {
1560 th := v.Theme
1561 const indent = " "
1562
1563 tokens := m.Meta["tokens_before"]
1564 if tokens == "" {
1565 tokens = "?"
1566 }
1567
1568 if v.ExpandAll {
1569 var lines []string
1570 header := th.FG256(th.Muted, fmt.Sprintf("compacted from ~%s tokens", tokens))
1571 lines = append(lines, indent+header)
1572 lines = append(lines, "")
1573 for _, c := range m.Content {
1574 if tb, ok := c.(provider.TextBlock); ok {
1575 text := tb.Text
1576 if idx := strings.Index(text, "\n\n"); idx >= 0 && strings.HasPrefix(text, "## Context Summary") {
1577 text = text[idx+2:]
1578 }
1579 md := RenderMarkdown(text, th, width-4)
1580 for _, l := range strings.Split(md, "\n") {
1581 lines = append(lines, indent+l)
1582 }
1583 }
1584 }
1585 return lines
1586 }
1587
1588 // Collapsed: single line, no banner.
1589 line := th.FG256(th.Muted, fmt.Sprintf("compacted from ~%s tokens (ctrl+o to expand)", tokens))
1590 return []string{indent + line}
1591}
1592
1593// StatusBarParams groups the many bits of state the status bar needs.
1594// Grew from a flat argument list once we settled on the layout.
1595type StatusBarParams struct {
1596 Theme Theme
1597 Provider string
1598 Model string
1599 Busy bool
1600 BusyPrefix string // spinner + funny line when busy
1601 CWD string
1602 Locked bool // sandbox on?
1603
1604 // Cumulative session usage and cost.
1605 Usage provider.Usage
1606 // Subscription is true when the credential is an OAuth token (claude
1607 // pro/max, chatgpt plus/pro) rather than a paid api key. We still
1608 // compute a cost for visibility and append "(sub)" so the user
1609 // knows no real money moved.
1610 Subscription bool
1611
1612 // Last turn's input+cache tokens (approximates current live context).
1613 ContextUsed int
1614 ContextMax int // model's context window; 0 disables the percentage
1615
1616 // AutoCompacting is true when the agent is currently running a
1617 // model-triggered condense pass. Surfaces as "(auto)" after the
1618 // context percentage so it's clear where the spinner is coming from.
1619 AutoCompacting bool
1620
1621 // Telegram true when the telegram bridge is connected. Adds a
1622 // small "- tg -" tag to the cwd line so the user can tell at a
1623 // glance that dms are being mirrored into this session.
1624 Telegram bool
1625
1626 Cols int // terminal width; drives right-alignment of cwd
1627}
1628
1629// StatusBar builds the status shown above the editor. Always returns
1630// two lines when a cwd is provided: the stats on the first line, the
1631// cwd on its own line below, indented to match the stats column. This
1632// keeps the status bar stable across terminal resizes (the cwd never
1633// jumps from right-aligned-on-line-1 to flush-left-on-line-2) and
1634// makes a long cwd safe at any width.
1635//
1636// Layout:
1637//
1638// <busyPrefix> (provider) model stats <- line 1
1639// cwd <- line 2 (2-space indent)
1640//
1641// The old "ctrl+c exit - /help" / "esc cancel" hint is gone entirely.
1642// The slash-command popup and the queued/sliding-in chips already
1643// cover the discoverability of those keybindings.
1644func StatusBar(p StatusBarParams) []string {
1645 th := p.Theme
1646
1647 // Token stats: only include each segment when non-zero. Keeps
1648 // the bar compact on brand-new sessions.
1649 var stats []string
1650 if p.Usage.InputTokens > 0 {
1651 stats = append(stats, fmt.Sprintf("↑%s", formatTokens(p.Usage.InputTokens)))
1652 }
1653 if p.Usage.OutputTokens > 0 {
1654 stats = append(stats, fmt.Sprintf("↓%s", formatTokens(p.Usage.OutputTokens)))
1655 }
1656 if p.Usage.CacheReadTokens > 0 {
1657 stats = append(stats, fmt.Sprintf("R%s", formatTokens(p.Usage.CacheReadTokens)))
1658 }
1659 if p.Usage.CacheWriteTokens > 0 {
1660 stats = append(stats, fmt.Sprintf("W%s", formatTokens(p.Usage.CacheWriteTokens)))
1661 }
1662
1663 // Cost: always show the dollar value computed from token counts,
1664 // even on subscription. Lets you see what the equivalent api cost
1665 // would be (handy for gauging subscription value). Append "(sub)"
1666 // only as a hint that no real money moved.
1667 var costStr string
1668 if p.Usage.CostUSD > 0 || p.Subscription {
1669 costStr = fmt.Sprintf("$%.3f", p.Usage.CostUSD)
1670 if p.Subscription {
1671 costStr += " (sub)"
1672 }
1673 }
1674 if costStr != "" {
1675 stats = append(stats, costStr)
1676 }
1677
1678 // Context %. Color-coded: yellow >70, red >90.
1679 ctx, ctxColor := contextUsage(th, p.ContextUsed, p.ContextMax)
1680 if ctx != "" {
1681 if p.AutoCompacting {
1682 ctx += " (auto)"
1683 }
1684 stats = append(stats, th.FG256(ctxColor, ctx))
1685 }
1686
1687 // Layout uses exactly 2 spaces of horizontal padding everywhere:
1688 // 2 spaces (openai) gpt-5.4 $0.000 (sub) 0.0%/400k ~/Sites/zot
1689 // matches the editor prompt's left inset so the bar lines up
1690 // vertically with the conversation column.
1691 const pad = " " // 2 spaces
1692
1693 left := fmt.Sprintf("(%s) %s", p.Provider, p.Model)
1694 middle := strings.Join(stats, " ")
1695
1696 var leftBuilder strings.Builder
1697 if p.BusyPrefix != "" {
1698 // Don't re-color the payload itself — the caller already set
1699 // fg colors on the spinner glyph, message, and elapsed
1700 // segments. Wrapping the whole thing here would override
1701 // those choices. The pad itself needs no color (it's spaces).
1702 leftBuilder.WriteString(pad + p.BusyPrefix)
1703 // Exactly one pad (2 spaces) between the busy segment and
1704 // the provider/model block. The leading pad above covers
1705 // the left indent.
1706 leftBuilder.WriteString(pad)
1707 } else {
1708 // Idle path: a single pad of left inset so the line
1709 // aligns with the conversation column on its left edge
1710 // (" you" / " zot" message markers). Without the busy
1711 // prefix there's no trailing separator to double-pad.
1712 leftBuilder.WriteString(pad)
1713 }
1714 leftBuilder.WriteString(th.FG256(th.Muted, left))
1715 if middle != "" {
1716 leftBuilder.WriteString(pad)
1717 // `middle` already has colorized context segments; wrap the rest in muted.
1718 leftBuilder.WriteString(th.FG256(th.Muted, middle))
1719 }
1720
1721 cwd := shortenHome(p.CWD)
1722 tags := ""
1723 if p.Locked {
1724 tags += "- jailed "
1725 }
1726 if p.Telegram {
1727 tags += "- tg "
1728 }
1729 if tags != "" && cwd != "" {
1730 cwd = tags + "- " + cwd
1731 }
1732
1733 primary := leftBuilder.String()
1734
1735 // On narrow terminals the single line wraps badly. If the visible
1736 // width exceeds cols and we have a busy prefix, split: keep the
1737 // busy prefix on line 1, put model+stats on line 2.
1738 if p.Cols > 0 && p.BusyPrefix != "" && visibleWidth(primary) > p.Cols {
1739 busyLine := pad + p.BusyPrefix
1740 var infoBuilder strings.Builder
1741 infoBuilder.WriteString(pad)
1742 infoBuilder.WriteString(th.FG256(th.Muted, left))
1743 if middle != "" {
1744 infoBuilder.WriteString(pad)
1745 infoBuilder.WriteString(th.FG256(th.Muted, middle))
1746 }
1747 lines := []string{busyLine, infoBuilder.String()}
1748 if cwd != "" {
1749 lines = append(lines, pad+th.FG256(th.Muted, cwd))
1750 }
1751 return lines
1752 }
1753
1754 if cwd == "" {
1755 return []string{primary}
1756 }
1757
1758 // Second line: indent with the same 2-space pad so the cwd lines
1759 // up under the "(provider)" column on line 1.
1760 cwdRendered := pad + th.FG256(th.Muted, cwd)
1761 return []string{primary, cwdRendered}
1762}
1763
1764// contextUsage renders the "N%/ctxMax" fragment, returning the
1765// rendered string plus the colour to wrap it in.
1766func contextUsage(th Theme, used, max int) (string, int) {
1767 if max <= 0 {
1768 if used <= 0 {
1769 return "", th.Muted
1770 }
1771 return formatTokens(used), th.Muted
1772 }
1773 pct := float64(used) / float64(max) * 100
1774 text := fmt.Sprintf("%.1f%%/%s", pct, formatTokens(max))
1775 switch {
1776 case pct > 90:
1777 return text, th.Error
1778 case pct > 70:
1779 return text, th.Warning
1780 }
1781 return text, th.Muted
1782}
1783
1784// formatTokens footer formatter:
1785//
1786// < 1000 -> "42"
1787// < 10_000 -> "2.7k"
1788// < 1_000_000 -> "35k"
1789// < 10M -> "1.1M"
1790// else -> "12M"
1791func formatTokens(n int) string {
1792 switch {
1793 case n < 0:
1794 return "0"
1795 case n < 1000:
1796 return fmt.Sprintf("%d", n)
1797 case n < 10000:
1798 return fmt.Sprintf("%.1fk", float64(n)/1000)
1799 case n < 1_000_000:
1800 return fmt.Sprintf("%dk", (n+500)/1000)
1801 case n < 10_000_000:
1802 return fmt.Sprintf("%.1fM", float64(n)/1_000_000)
1803 default:
1804 return fmt.Sprintf("%dM", (n+500_000)/1_000_000)
1805 }
1806}
1807
1808// shortenHome replaces the user's $HOME prefix with "~" for readability.
1809func shortenHome(p string) string {
1810 if p == "" {
1811 return ""
1812 }
1813 home := osUserHome()
1814 if home == "" {
1815 return p
1816 }
1817 if p == home {
1818 return "~"
1819 }
1820 if strings.HasPrefix(p, home+"/") {
1821 return "~" + p[len(home):]
1822 }
1823 return p
1824}
1825
1826// osUserHome is a tiny wrapper around os.UserHomeDir so tests can mock it.
1827var osUserHome = func() string {
1828 if h, err := osUserHomeDir(); err == nil {
1829 return h
1830 }
1831 return ""
1832}