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