1package editor
2
3import (
4 "context"
5 "fmt"
6 "io/fs"
7 "log/slog"
8 "math/rand"
9 "net/http"
10 "os"
11 "os/exec"
12 "path/filepath"
13 "runtime"
14 "slices"
15 "strings"
16 "unicode"
17
18 "github.com/charmbracelet/bubbles/v2/key"
19 "github.com/charmbracelet/bubbles/v2/textarea"
20 tea "github.com/charmbracelet/bubbletea/v2"
21 "github.com/charmbracelet/crush/internal/app"
22 "github.com/charmbracelet/crush/internal/config"
23 "github.com/charmbracelet/crush/internal/fsext"
24 "github.com/charmbracelet/crush/internal/message"
25 "github.com/charmbracelet/crush/internal/session"
26 "github.com/charmbracelet/crush/internal/tui/components/chat"
27 "github.com/charmbracelet/crush/internal/tui/components/completions"
28 "github.com/charmbracelet/crush/internal/tui/components/core/layout"
29 "github.com/charmbracelet/crush/internal/tui/components/dialogs"
30 "github.com/charmbracelet/crush/internal/tui/components/dialogs/commands"
31 "github.com/charmbracelet/crush/internal/tui/components/dialogs/filepicker"
32 "github.com/charmbracelet/crush/internal/tui/components/dialogs/quit"
33 "github.com/charmbracelet/crush/internal/tui/styles"
34 "github.com/charmbracelet/crush/internal/tui/util"
35 "github.com/charmbracelet/lipgloss/v2"
36)
37
38type Editor interface {
39 util.Model
40 layout.Sizeable
41 layout.Focusable
42 layout.Help
43 layout.Positional
44
45 SetSession(session session.Session) tea.Cmd
46 IsCompletionsOpen() bool
47 HasAttachments() bool
48 Cursor() *tea.Cursor
49}
50
51type FileCompletionItem struct {
52 Path string // The file path
53}
54
55type editorCmp struct {
56 width int
57 height int
58 x, y int
59 app *app.App
60 session session.Session
61 textarea *textarea.Model
62 attachments []message.Attachment
63 deleteMode bool
64 readyPlaceholder string
65 workingPlaceholder string
66
67 keyMap EditorKeyMap
68
69 // injected file dir lister
70 listDirResolver fsext.DirectoryListerResolver
71
72 // File path completions
73 currentQuery string
74 completionsStartIndex int
75 isCompletionsOpen bool
76}
77
78var DeleteKeyMaps = DeleteAttachmentKeyMaps{
79 AttachmentDeleteMode: key.NewBinding(
80 key.WithKeys("ctrl+r"),
81 key.WithHelp("ctrl+r+{i}", "delete attachment at index i"),
82 ),
83 Escape: key.NewBinding(
84 key.WithKeys("esc", "alt+esc"),
85 key.WithHelp("esc", "cancel delete mode"),
86 ),
87 DeleteAllAttachments: key.NewBinding(
88 key.WithKeys("r"),
89 key.WithHelp("ctrl+r+r", "delete all attachments"),
90 ),
91}
92
93const (
94 maxAttachments = 5
95)
96
97type OpenEditorMsg struct {
98 Text string
99}
100
101func (m *editorCmp) openEditor(value string) tea.Cmd {
102 editor := os.Getenv("EDITOR")
103 if editor == "" {
104 // Use platform-appropriate default editor
105 if runtime.GOOS == "windows" {
106 editor = "notepad"
107 } else {
108 editor = "nvim"
109 }
110 }
111
112 tmpfile, err := os.CreateTemp("", "msg_*.md")
113 if err != nil {
114 return util.ReportError(err)
115 }
116 defer tmpfile.Close() //nolint:errcheck
117 if _, err := tmpfile.WriteString(value); err != nil {
118 return util.ReportError(err)
119 }
120 c := exec.CommandContext(context.TODO(), editor, tmpfile.Name())
121 c.Stdin = os.Stdin
122 c.Stdout = os.Stdout
123 c.Stderr = os.Stderr
124 return tea.ExecProcess(c, func(err error) tea.Msg {
125 if err != nil {
126 return util.ReportError(err)
127 }
128 content, err := os.ReadFile(tmpfile.Name())
129 if err != nil {
130 return util.ReportError(err)
131 }
132 if len(content) == 0 {
133 return util.ReportWarn("Message is empty")
134 }
135 os.Remove(tmpfile.Name())
136 return OpenEditorMsg{
137 Text: strings.TrimSpace(string(content)),
138 }
139 })
140}
141
142func (m *editorCmp) Init() tea.Cmd {
143 return nil
144}
145
146func (m *editorCmp) send() tea.Cmd {
147 value := m.textarea.Value()
148 value = strings.TrimSpace(value)
149
150 switch value {
151 case "exit", "quit":
152 m.textarea.Reset()
153 return util.CmdHandler(dialogs.OpenDialogMsg{Model: quit.NewQuitDialog()})
154 }
155
156 m.textarea.Reset()
157 attachments := m.attachments
158
159 m.attachments = nil
160 if value == "" {
161 return nil
162 }
163
164 // Change the placeholder when sending a new message.
165 m.randomizePlaceholders()
166
167 return tea.Batch(
168 util.CmdHandler(chat.SendMsg{
169 Text: value,
170 Attachments: attachments,
171 }),
172 )
173}
174
175func (m *editorCmp) repositionCompletions() tea.Msg {
176 x, y := m.completionsPosition()
177 return completions.RepositionCompletionsMsg{X: x, Y: y}
178}
179
180func onCompletionItemSelect(fsys fs.FS, activeModelHasImageSupport func() (bool, string), item FileCompletionItem, insert bool, m *editorCmp) (tea.Model, tea.Cmd) {
181 var cmd tea.Cmd
182 path := item.Path
183 // check if item is an image
184 if isExtOfAllowedImageType(path) {
185 if imagesSupported, modelName := activeModelHasImageSupport(); !imagesSupported {
186 // TODO(tauraamui): consolidate this kind of standard image attachment related warning
187 return m, util.ReportWarn("File attachments are not supported by the current model: " + modelName)
188 }
189 slog.Debug("checking if image is too big", path, 1)
190 tooBig, _ := filepicker.IsFileTooBigWithFS(os.DirFS(filepath.Dir(path)), path, filepicker.MaxAttachmentSize)
191 if tooBig {
192 return m, nil
193 }
194
195 content, err := fs.ReadFile(fsys, path)
196 if err != nil {
197 return m, nil
198 }
199 mimeBufferSize := min(512, len(content))
200 mimeType := http.DetectContentType(content[:mimeBufferSize])
201 fileName := filepath.Base(path)
202 attachment := message.Attachment{FilePath: path, FileName: fileName, MimeType: mimeType, Content: content}
203 cmd = util.CmdHandler(filepicker.FilePickedMsg{
204 Attachment: attachment,
205 })
206 }
207
208 word := m.textarea.Word()
209 // If the selected item is a file, insert its path into the textarea
210 originalValue := m.textarea.Value()
211 newValue := originalValue[:m.completionsStartIndex] // Remove the current query
212 if cmd == nil {
213 newValue += path // insert the file path for non-images
214 }
215 newValue += originalValue[m.completionsStartIndex+len(word):] // Append the rest of the value
216 // XXX: This will always move the cursor to the end of the textarea.
217 m.textarea.SetValue(newValue)
218 m.textarea.MoveToEnd()
219 if !insert {
220 m.isCompletionsOpen = false
221 m.currentQuery = ""
222 m.completionsStartIndex = 0
223 }
224
225 return m, cmd
226}
227
228func isExtOfAllowedImageType(path string) bool {
229 isAllowedType := false
230 // TODO(tauraamui) [17/09/2025]: this needs to be combined with the actual data inference/checking
231 // of the contents that happens when we resolve the "mime" type
232 for _, ext := range filepicker.AllowedTypes {
233 if strings.HasSuffix(path, ext) {
234 isAllowedType = true
235 break
236 }
237 }
238 return isAllowedType
239}
240
241type ResolveAbs func(path string) (string, error)
242
243func onPaste(msg tea.PasteMsg) tea.Msg {
244 return filepicker.OnPaste(filepicker.ResolveFS, string(msg))
245}
246
247func activeModelHasImageSupport() (bool, string) {
248 agentCfg := config.Get().Agents["coder"]
249 model := config.Get().GetModelByType(agentCfg.Model)
250 return model.SupportsImages, model.Name
251}
252
253func (m *editorCmp) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
254 var cmd tea.Cmd
255 var cmds []tea.Cmd
256 switch msg := msg.(type) {
257 case tea.WindowSizeMsg:
258 return m, m.repositionCompletions
259 case filepicker.FilePickedMsg:
260 if len(m.attachments) >= maxAttachments {
261 return m, util.ReportError(fmt.Errorf("cannot add more than %d images", maxAttachments))
262 }
263 m.attachments = append(m.attachments, msg.Attachment)
264 return m, nil
265 case completions.CompletionsOpenedMsg:
266 m.isCompletionsOpen = true
267 case completions.CompletionsClosedMsg:
268 m.isCompletionsOpen = false
269 m.currentQuery = ""
270 m.completionsStartIndex = 0
271 case completions.SelectCompletionMsg:
272 if !m.isCompletionsOpen {
273 return m, nil
274 }
275 if item, ok := msg.Value.(FileCompletionItem); ok {
276 return onCompletionItemSelect(os.DirFS("."), activeModelHasImageSupport, item, msg.Insert, m)
277 }
278 case commands.OpenExternalEditorMsg:
279 if m.app.CoderAgent.IsSessionBusy(m.session.ID) {
280 return m, util.ReportWarn("Agent is working, please wait...")
281 }
282 return m, m.openEditor(m.textarea.Value())
283 case OpenEditorMsg:
284 m.textarea.SetValue(msg.Text)
285 m.textarea.MoveToEnd()
286 case tea.PasteMsg:
287 agentCfg := config.Get().Agents["coder"]
288 model := config.Get().GetModelByType(agentCfg.Model)
289 if !model.SupportsImages {
290 return m, util.ReportWarn("File attachments are not supported by the current model: " + model.Name)
291 }
292 return m, filepicker.OnPaste(filepicker.ResolveFS, string(msg)) // inject fsys accessibly from PWD
293
294 case commands.ToggleYoloModeMsg:
295 m.setEditorPrompt()
296 return m, nil
297 case tea.KeyPressMsg:
298 cur := m.textarea.Cursor()
299 curIdx := m.textarea.Width()*cur.Y + cur.X
300 switch {
301 // Completions
302 case msg.String() == "/" && !m.isCompletionsOpen &&
303 // only show if beginning of prompt, or if previous char is a space or newline:
304 (len(m.textarea.Value()) == 0 || unicode.IsSpace(rune(m.textarea.Value()[len(m.textarea.Value())-1]))):
305 m.isCompletionsOpen = true
306 m.currentQuery = ""
307 m.completionsStartIndex = curIdx
308
309 cmds = append(cmds, m.startCompletions())
310 case m.isCompletionsOpen && curIdx <= m.completionsStartIndex:
311 cmds = append(cmds, util.CmdHandler(completions.CloseCompletionsMsg{}))
312 }
313 if key.Matches(msg, DeleteKeyMaps.AttachmentDeleteMode) {
314 m.deleteMode = true
315 return m, nil
316 }
317 if key.Matches(msg, DeleteKeyMaps.DeleteAllAttachments) && m.deleteMode {
318 m.deleteMode = false
319 m.attachments = nil
320 return m, nil
321 }
322 rune := msg.Code
323 if m.deleteMode && unicode.IsDigit(rune) {
324 num := int(rune - '0')
325 m.deleteMode = false
326 if num < 10 && len(m.attachments) > num {
327 if num == 0 {
328 m.attachments = m.attachments[num+1:]
329 } else {
330 m.attachments = slices.Delete(m.attachments, num, num+1)
331 }
332 return m, nil
333 }
334 }
335 if key.Matches(msg, m.keyMap.OpenEditor) {
336 if m.app.CoderAgent.IsSessionBusy(m.session.ID) {
337 return m, util.ReportWarn("Agent is working, please wait...")
338 }
339 return m, m.openEditor(m.textarea.Value())
340 }
341 if key.Matches(msg, DeleteKeyMaps.Escape) {
342 m.deleteMode = false
343 return m, nil
344 }
345 if key.Matches(msg, m.keyMap.Newline) {
346 m.textarea.InsertRune('\n')
347 cmds = append(cmds, util.CmdHandler(completions.CloseCompletionsMsg{}))
348 }
349 // Handle Enter key
350 if m.textarea.Focused() && key.Matches(msg, m.keyMap.SendMessage) {
351 value := m.textarea.Value()
352 if strings.HasSuffix(value, "\\") {
353 // If the last character is a backslash, remove it and add a newline.
354 m.textarea.SetValue(strings.TrimSuffix(value, "\\"))
355 } else {
356 // Otherwise, send the message
357 return m, m.send()
358 }
359 }
360 }
361
362 m.textarea, cmd = m.textarea.Update(msg)
363 cmds = append(cmds, cmd)
364
365 if m.textarea.Focused() {
366 kp, ok := msg.(tea.KeyPressMsg)
367 if ok {
368 if kp.String() == "space" || m.textarea.Value() == "" {
369 m.isCompletionsOpen = false
370 m.currentQuery = ""
371 m.completionsStartIndex = 0
372 cmds = append(cmds, util.CmdHandler(completions.CloseCompletionsMsg{}))
373 } else {
374 word := m.textarea.Word()
375 if strings.HasPrefix(word, "/") {
376 // XXX: wont' work if editing in the middle of the field.
377 m.completionsStartIndex = strings.LastIndex(m.textarea.Value(), word)
378 m.currentQuery = word[1:]
379 x, y := m.completionsPosition()
380 x -= len(m.currentQuery)
381 m.isCompletionsOpen = true
382 cmds = append(cmds,
383 util.CmdHandler(completions.FilterCompletionsMsg{
384 Query: m.currentQuery,
385 Reopen: m.isCompletionsOpen,
386 X: x,
387 Y: y,
388 }),
389 )
390 } else if m.isCompletionsOpen {
391 m.isCompletionsOpen = false
392 m.currentQuery = ""
393 m.completionsStartIndex = 0
394 cmds = append(cmds, util.CmdHandler(completions.CloseCompletionsMsg{}))
395 }
396 }
397 }
398 }
399
400 return m, tea.Batch(cmds...)
401}
402
403func (m *editorCmp) setEditorPrompt() {
404 if perm := m.app.Permissions; perm != nil {
405 if perm.SkipRequests() {
406 m.textarea.SetPromptFunc(4, yoloPromptFunc)
407 return
408 }
409 }
410 m.textarea.SetPromptFunc(4, normalPromptFunc)
411}
412
413func (m *editorCmp) completionsPosition() (int, int) {
414 cur := m.textarea.Cursor()
415 if cur == nil {
416 return m.x, m.y + 1 // adjust for padding
417 }
418 x := cur.X + m.x
419 y := cur.Y + m.y + 1 // adjust for padding
420 return x, y
421}
422
423func (m *editorCmp) Cursor() *tea.Cursor {
424 cursor := m.textarea.Cursor()
425 if cursor != nil {
426 cursor.X = cursor.X + m.x + 1
427 cursor.Y = cursor.Y + m.y + 1 // adjust for padding
428 }
429 return cursor
430}
431
432var readyPlaceholders = [...]string{
433 "Ready!",
434 "Ready...",
435 "Ready?",
436 "Ready for instructions",
437}
438
439var workingPlaceholders = [...]string{
440 "Working!",
441 "Working...",
442 "Brrrrr...",
443 "Prrrrrrrr...",
444 "Processing...",
445 "Thinking...",
446}
447
448func (m *editorCmp) randomizePlaceholders() {
449 m.workingPlaceholder = workingPlaceholders[rand.Intn(len(workingPlaceholders))]
450 m.readyPlaceholder = readyPlaceholders[rand.Intn(len(readyPlaceholders))]
451}
452
453func (m *editorCmp) View() string {
454 t := styles.CurrentTheme()
455 // Update placeholder
456 if m.app.CoderAgent != nil && m.app.CoderAgent.IsBusy() {
457 m.textarea.Placeholder = m.workingPlaceholder
458 } else {
459 m.textarea.Placeholder = m.readyPlaceholder
460 }
461 if m.app.Permissions.SkipRequests() {
462 m.textarea.Placeholder = "Yolo mode!"
463 }
464 if len(m.attachments) == 0 {
465 content := t.S().Base.Padding(1).Render(
466 m.textarea.View(),
467 )
468 return content
469 }
470 content := t.S().Base.Padding(0, 1, 1, 1).Render(
471 lipgloss.JoinVertical(lipgloss.Top,
472 m.attachmentsContent(),
473 m.textarea.View(),
474 ),
475 )
476 return content
477}
478
479func (m *editorCmp) SetSize(width, height int) tea.Cmd {
480 m.width = width
481 m.height = height
482 m.textarea.SetWidth(width - 2) // adjust for padding
483 m.textarea.SetHeight(height - 2) // adjust for padding
484 return nil
485}
486
487func (m *editorCmp) GetSize() (int, int) {
488 return m.textarea.Width(), m.textarea.Height()
489}
490
491func (m *editorCmp) attachmentsContent() string {
492 var styledAttachments []string
493 t := styles.CurrentTheme()
494 attachmentStyles := t.S().Base.
495 MarginLeft(1).
496 Background(t.FgMuted).
497 Foreground(t.FgBase)
498 for i, attachment := range m.attachments {
499 var filename string
500 if len(attachment.FileName) > 10 {
501 filename = fmt.Sprintf(" %s %s...", styles.DocumentIcon, attachment.FileName[0:7])
502 } else {
503 filename = fmt.Sprintf(" %s %s", styles.DocumentIcon, attachment.FileName)
504 }
505 if m.deleteMode {
506 filename = fmt.Sprintf("%d%s", i, filename)
507 }
508 styledAttachments = append(styledAttachments, attachmentStyles.Render(filename))
509 }
510 content := lipgloss.JoinHorizontal(lipgloss.Left, styledAttachments...)
511 return content
512}
513
514func (m *editorCmp) SetPosition(x, y int) tea.Cmd {
515 m.x = x
516 m.y = y
517 return nil
518}
519
520func (m *editorCmp) startCompletions() func() tea.Msg {
521 return func() tea.Msg {
522 files, _, _ := m.listDirResolver()(".", nil)
523 slices.Sort(files)
524 completionItems := make([]completions.Completion, 0, len(files))
525 for _, file := range files {
526 file = strings.TrimPrefix(file, "./")
527 completionItems = append(completionItems, completions.Completion{
528 Title: file,
529 Value: FileCompletionItem{
530 Path: file,
531 },
532 })
533 }
534
535 x, y := m.completionsPosition()
536 return completions.OpenCompletionsMsg{
537 Completions: completionItems,
538 X: x,
539 Y: y,
540 }
541 }
542}
543
544// Blur implements Container.
545func (c *editorCmp) Blur() tea.Cmd {
546 c.textarea.Blur()
547 return nil
548}
549
550// Focus implements Container.
551func (c *editorCmp) Focus() tea.Cmd {
552 return c.textarea.Focus()
553}
554
555// IsFocused implements Container.
556func (c *editorCmp) IsFocused() bool {
557 return c.textarea.Focused()
558}
559
560// Bindings implements Container.
561func (c *editorCmp) Bindings() []key.Binding {
562 return c.keyMap.KeyBindings()
563}
564
565// TODO: most likely we do not need to have the session here
566// we need to move some functionality to the page level
567func (c *editorCmp) SetSession(session session.Session) tea.Cmd {
568 c.session = session
569 return nil
570}
571
572func (c *editorCmp) IsCompletionsOpen() bool {
573 return c.isCompletionsOpen
574}
575
576func (c *editorCmp) HasAttachments() bool {
577 return len(c.attachments) > 0
578}
579
580func normalPromptFunc(info textarea.PromptInfo) string {
581 t := styles.CurrentTheme()
582 if info.LineNumber == 0 {
583 return " > "
584 }
585 if info.Focused {
586 return t.S().Base.Foreground(t.GreenDark).Render("::: ")
587 }
588 return t.S().Muted.Render("::: ")
589}
590
591func yoloPromptFunc(info textarea.PromptInfo) string {
592 t := styles.CurrentTheme()
593 if info.LineNumber == 0 {
594 if info.Focused {
595 return fmt.Sprintf("%s ", t.YoloIconFocused)
596 } else {
597 return fmt.Sprintf("%s ", t.YoloIconBlurred)
598 }
599 }
600 if info.Focused {
601 return fmt.Sprintf("%s ", t.YoloDotsFocused)
602 }
603 return fmt.Sprintf("%s ", t.YoloDotsBlurred)
604}
605
606func newTextArea() *textarea.Model {
607 t := styles.CurrentTheme()
608 ta := textarea.New()
609 ta.SetStyles(t.S().TextArea)
610 ta.ShowLineNumbers = false
611 ta.CharLimit = -1
612 ta.SetVirtualCursor(false)
613 ta.Focus()
614 return ta
615}
616
617func newEditor(app *app.App, resolveDirLister fsext.DirectoryListerResolver) *editorCmp {
618 e := editorCmp{
619 // TODO: remove the app instance from here
620 app: app,
621 textarea: newTextArea(),
622 keyMap: DefaultEditorKeyMap(),
623 listDirResolver: resolveDirLister,
624 }
625 e.setEditorPrompt()
626
627 e.randomizePlaceholders()
628 e.textarea.Placeholder = e.readyPlaceholder
629
630 return &e
631}
632
633func New(app *app.App) Editor {
634 ls := app.Config().Options.TUI.Completions.Limits
635 return newEditor(app, fsext.ResolveDirectoryLister(ls()))
636}