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