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