1package editor
2
3import (
4 "fmt"
5 "os"
6 "os/exec"
7 "runtime"
8 "slices"
9 "strings"
10 "unicode"
11
12 "github.com/charmbracelet/bubbles/v2/key"
13 "github.com/charmbracelet/bubbles/v2/textarea"
14 tea "github.com/charmbracelet/bubbletea/v2"
15 "github.com/charmbracelet/crush/internal/app"
16 "github.com/charmbracelet/crush/internal/fsext"
17 "github.com/charmbracelet/crush/internal/message"
18 "github.com/charmbracelet/crush/internal/session"
19 "github.com/charmbracelet/crush/internal/tui/components/chat"
20 "github.com/charmbracelet/crush/internal/tui/components/completions"
21 "github.com/charmbracelet/crush/internal/tui/components/core/layout"
22 "github.com/charmbracelet/crush/internal/tui/components/dialogs"
23 "github.com/charmbracelet/crush/internal/tui/components/dialogs/filepicker"
24 "github.com/charmbracelet/crush/internal/tui/components/dialogs/quit"
25 "github.com/charmbracelet/crush/internal/tui/styles"
26 "github.com/charmbracelet/crush/internal/tui/util"
27 "github.com/charmbracelet/lipgloss/v2"
28)
29
30type Editor interface {
31 util.Model
32 layout.Sizeable
33 layout.Focusable
34 layout.Help
35 layout.Positional
36
37 SetSession(session session.Session) tea.Cmd
38 IsCompletionsOpen() bool
39 Cursor() *tea.Cursor
40}
41
42type FileCompletionItem struct {
43 Path string // The file path
44}
45
46type editorCmp struct {
47 width int
48 height int
49 x, y int
50 app *app.App
51 session session.Session
52 textarea textarea.Model
53 attachments []message.Attachment
54 deleteMode bool
55
56 keyMap EditorKeyMap
57
58 // File path completions
59 currentQuery string
60 completionsStartIndex int
61 isCompletionsOpen bool
62}
63
64var DeleteKeyMaps = DeleteAttachmentKeyMaps{
65 AttachmentDeleteMode: key.NewBinding(
66 key.WithKeys("ctrl+r"),
67 key.WithHelp("ctrl+r+{i}", "delete attachment at index i"),
68 ),
69 Escape: key.NewBinding(
70 key.WithKeys("esc"),
71 key.WithHelp("esc", "cancel delete mode"),
72 ),
73 DeleteAllAttachments: key.NewBinding(
74 key.WithKeys("r"),
75 key.WithHelp("ctrl+r+r", "delete all attachments"),
76 ),
77}
78
79const (
80 maxAttachments = 5
81)
82
83type openEditorMsg struct {
84 Text string
85}
86
87func (m *editorCmp) openEditor(value string) tea.Cmd {
88 editor := os.Getenv("EDITOR")
89 if editor == "" {
90 // Use platform-appropriate default editor
91 if runtime.GOOS == "windows" {
92 editor = "notepad"
93 } else {
94 editor = "nvim"
95 }
96 }
97
98 tmpfile, err := os.CreateTemp("", "msg_*.md")
99 if err != nil {
100 return util.ReportError(err)
101 }
102 defer tmpfile.Close() //nolint:errcheck
103 if _, err := tmpfile.WriteString(value); err != nil {
104 return util.ReportError(err)
105 }
106 c := exec.Command(editor, tmpfile.Name())
107 c.Stdin = os.Stdin
108 c.Stdout = os.Stdout
109 c.Stderr = os.Stderr
110 return tea.ExecProcess(c, func(err error) tea.Msg {
111 if err != nil {
112 return util.ReportError(err)
113 }
114 content, err := os.ReadFile(tmpfile.Name())
115 if err != nil {
116 return util.ReportError(err)
117 }
118 if len(content) == 0 {
119 return util.ReportWarn("Message is empty")
120 }
121 os.Remove(tmpfile.Name())
122 return openEditorMsg{
123 Text: strings.TrimSpace(string(content)),
124 }
125 })
126}
127
128func (m *editorCmp) Init() tea.Cmd {
129 return nil
130}
131
132func (m *editorCmp) send() tea.Cmd {
133 if m.app.CoderAgent == nil {
134 return util.ReportError(fmt.Errorf("coder agent is not initialized"))
135 }
136 if m.app.CoderAgent.IsSessionBusy(m.session.ID) {
137 return util.ReportWarn("Agent is working, please wait...")
138 }
139
140 value := m.textarea.Value()
141 value = strings.TrimSpace(value)
142
143 switch value {
144 case "exit", "quit":
145 m.textarea.Reset()
146 return util.CmdHandler(dialogs.OpenDialogMsg{Model: quit.NewQuitDialog()})
147 }
148
149 m.textarea.Reset()
150 attachments := m.attachments
151
152 m.attachments = nil
153 if value == "" {
154 return nil
155 }
156 return tea.Batch(
157 util.CmdHandler(chat.SendMsg{
158 Text: value,
159 Attachments: attachments,
160 }),
161 )
162}
163
164func (m *editorCmp) repositionCompletions() tea.Msg {
165 cur := m.textarea.Cursor()
166 x := cur.X + m.x // adjust for padding
167 y := cur.Y + m.y + 1
168 return completions.RepositionCompletionsMsg{X: x, Y: y}
169}
170
171func (m *editorCmp) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
172 var cmd tea.Cmd
173 var cmds []tea.Cmd
174 switch msg := msg.(type) {
175 case tea.WindowSizeMsg:
176 return m, m.repositionCompletions
177 case filepicker.FilePickedMsg:
178 if len(m.attachments) >= maxAttachments {
179 return m, util.ReportError(fmt.Errorf("cannot add more than %d images", maxAttachments))
180 }
181 m.attachments = append(m.attachments, msg.Attachment)
182 return m, nil
183 case completions.CompletionsOpenedMsg:
184 m.isCompletionsOpen = true
185 case completions.CompletionsClosedMsg:
186 m.isCompletionsOpen = false
187 m.currentQuery = ""
188 m.completionsStartIndex = 0
189 case completions.SelectCompletionMsg:
190 if !m.isCompletionsOpen {
191 return m, nil
192 }
193 if item, ok := msg.Value.(FileCompletionItem); ok {
194 // If the selected item is a file, insert its path into the textarea
195 value := m.textarea.Value()
196 value = value[:m.completionsStartIndex]
197 value += item.Path
198 m.textarea.SetValue(value)
199 if !msg.Insert {
200 m.isCompletionsOpen = false
201 m.currentQuery = ""
202 m.completionsStartIndex = 0
203 }
204 return m, nil
205 }
206 case openEditorMsg:
207 m.textarea.SetValue(msg.Text)
208 m.textarea.MoveToEnd()
209 case tea.KeyPressMsg:
210 switch {
211 // Completions
212 case msg.String() == "/" && !m.isCompletionsOpen &&
213 // only show if beginning of prompt, or if previous char is a space:
214 (len(m.textarea.Value()) == 0 || m.textarea.Value()[len(m.textarea.Value())-1] == ' '):
215 m.isCompletionsOpen = true
216 m.currentQuery = ""
217 m.completionsStartIndex = len(m.textarea.Value())
218 cmds = append(cmds, m.startCompletions)
219 case m.isCompletionsOpen && m.textarea.Cursor().X <= m.completionsStartIndex:
220 cmds = append(cmds, util.CmdHandler(completions.CloseCompletionsMsg{}))
221 }
222 if key.Matches(msg, DeleteKeyMaps.AttachmentDeleteMode) {
223 m.deleteMode = true
224 return m, nil
225 }
226 if key.Matches(msg, DeleteKeyMaps.DeleteAllAttachments) && m.deleteMode {
227 m.deleteMode = false
228 m.attachments = nil
229 return m, nil
230 }
231 rune := msg.Code
232 if m.deleteMode && unicode.IsDigit(rune) {
233 num := int(rune - '0')
234 m.deleteMode = false
235 if num < 10 && len(m.attachments) > num {
236 if num == 0 {
237 m.attachments = m.attachments[num+1:]
238 } else {
239 m.attachments = slices.Delete(m.attachments, num, num+1)
240 }
241 return m, nil
242 }
243 }
244 if key.Matches(msg, m.keyMap.OpenEditor) {
245 if m.app.CoderAgent.IsSessionBusy(m.session.ID) {
246 return m, util.ReportWarn("Agent is working, please wait...")
247 }
248 return m, m.openEditor(m.textarea.Value())
249 }
250 if key.Matches(msg, DeleteKeyMaps.Escape) {
251 m.deleteMode = false
252 return m, nil
253 }
254 if key.Matches(msg, m.keyMap.Newline) {
255 m.textarea.InsertRune('\n')
256 }
257 // Handle Enter key
258 if m.textarea.Focused() && key.Matches(msg, m.keyMap.SendMessage) {
259 value := m.textarea.Value()
260 if len(value) > 0 && value[len(value)-1] == '\\' {
261 // If the last character is a backslash, remove it and add a newline
262 m.textarea.SetValue(value[:len(value)-1])
263 } else {
264 // Otherwise, send the message
265 return m, m.send()
266 }
267 }
268 }
269
270 m.textarea, cmd = m.textarea.Update(msg)
271 cmds = append(cmds, cmd)
272
273 if m.textarea.Focused() {
274 kp, ok := msg.(tea.KeyPressMsg)
275 if ok {
276 if kp.String() == "space" || m.textarea.Value() == "" {
277 m.isCompletionsOpen = false
278 m.currentQuery = ""
279 m.completionsStartIndex = 0
280 cmds = append(cmds, util.CmdHandler(completions.CloseCompletionsMsg{}))
281 } else {
282 word := m.textarea.Word()
283 if strings.HasPrefix(word, "/") {
284 // XXX: wont' work if editing in the middle of the field.
285 m.completionsStartIndex = strings.LastIndex(m.textarea.Value(), word)
286 m.currentQuery = word[1:]
287 m.isCompletionsOpen = true
288 cmds = append(cmds, util.CmdHandler(completions.FilterCompletionsMsg{
289 Query: m.currentQuery,
290 Reopen: m.isCompletionsOpen,
291 }))
292 } else {
293 m.isCompletionsOpen = false
294 m.currentQuery = ""
295 m.completionsStartIndex = 0
296 cmds = append(cmds, util.CmdHandler(completions.CloseCompletionsMsg{}))
297 }
298 }
299 }
300 }
301
302 return m, tea.Batch(cmds...)
303}
304
305func (m *editorCmp) Cursor() *tea.Cursor {
306 cursor := m.textarea.Cursor()
307 if cursor != nil {
308 cursor.X = cursor.X + m.x + 1
309 cursor.Y = cursor.Y + m.y + 1 // adjust for padding
310 }
311 return cursor
312}
313
314func (m *editorCmp) View() string {
315 t := styles.CurrentTheme()
316 if len(m.attachments) == 0 {
317 content := t.S().Base.Padding(1).Render(
318 m.textarea.View(),
319 )
320 return content
321 }
322 content := t.S().Base.Padding(0, 1, 1, 1).Render(
323 lipgloss.JoinVertical(lipgloss.Top,
324 m.attachmentsContent(),
325 m.textarea.View(),
326 ),
327 )
328 return content
329}
330
331func (m *editorCmp) SetSize(width, height int) tea.Cmd {
332 m.width = width
333 m.height = height
334 m.textarea.SetWidth(width - 2) // adjust for padding
335 m.textarea.SetHeight(height - 2) // adjust for padding
336 return nil
337}
338
339func (m *editorCmp) GetSize() (int, int) {
340 return m.textarea.Width(), m.textarea.Height()
341}
342
343func (m *editorCmp) attachmentsContent() string {
344 var styledAttachments []string
345 t := styles.CurrentTheme()
346 attachmentStyles := t.S().Base.
347 MarginLeft(1).
348 Background(t.FgMuted).
349 Foreground(t.FgBase)
350 for i, attachment := range m.attachments {
351 var filename string
352 if len(attachment.FileName) > 10 {
353 filename = fmt.Sprintf(" %s %s...", styles.DocumentIcon, attachment.FileName[0:7])
354 } else {
355 filename = fmt.Sprintf(" %s %s", styles.DocumentIcon, attachment.FileName)
356 }
357 if m.deleteMode {
358 filename = fmt.Sprintf("%d%s", i, filename)
359 }
360 styledAttachments = append(styledAttachments, attachmentStyles.Render(filename))
361 }
362 content := lipgloss.JoinHorizontal(lipgloss.Left, styledAttachments...)
363 return content
364}
365
366func (m *editorCmp) SetPosition(x, y int) tea.Cmd {
367 m.x = x
368 m.y = y
369 return nil
370}
371
372func (m *editorCmp) startCompletions() tea.Msg {
373 files, _, _ := fsext.ListDirectory(".", []string{}, 0)
374 completionItems := make([]completions.Completion, 0, len(files))
375 for _, file := range files {
376 file = strings.TrimPrefix(file, "./")
377 completionItems = append(completionItems, completions.Completion{
378 Title: file,
379 Value: FileCompletionItem{
380 Path: file,
381 },
382 })
383 }
384
385 cur := m.textarea.Cursor()
386 x := cur.X + m.x // adjust for padding
387 y := cur.Y + m.y + 1
388 return completions.OpenCompletionsMsg{
389 Completions: completionItems,
390 X: x,
391 Y: y,
392 }
393}
394
395// Blur implements Container.
396func (c *editorCmp) Blur() tea.Cmd {
397 c.textarea.Blur()
398 return nil
399}
400
401// Focus implements Container.
402func (c *editorCmp) Focus() tea.Cmd {
403 return c.textarea.Focus()
404}
405
406// IsFocused implements Container.
407func (c *editorCmp) IsFocused() bool {
408 return c.textarea.Focused()
409}
410
411// Bindings implements Container.
412func (c *editorCmp) Bindings() []key.Binding {
413 return c.keyMap.KeyBindings()
414}
415
416// TODO: most likely we do not need to have the session here
417// we need to move some functionality to the page level
418func (c *editorCmp) SetSession(session session.Session) tea.Cmd {
419 c.session = session
420 return nil
421}
422
423func (c *editorCmp) IsCompletionsOpen() bool {
424 return c.isCompletionsOpen
425}
426
427func New(app *app.App) Editor {
428 t := styles.CurrentTheme()
429 ta := textarea.New()
430 ta.SetStyles(t.S().TextArea)
431 ta.SetPromptFunc(4, func(info textarea.PromptInfo) string {
432 if info.LineNumber == 0 {
433 return " > "
434 }
435 if info.Focused {
436 return t.S().Base.Foreground(t.GreenDark).Render("::: ")
437 } else {
438 return t.S().Muted.Render("::: ")
439 }
440 })
441 ta.ShowLineNumbers = false
442 ta.CharLimit = -1
443 ta.Placeholder = "Tell me more about this project..."
444 ta.SetVirtualCursor(false)
445 ta.Focus()
446
447 return &editorCmp{
448 // TODO: remove the app instance from here
449 app: app,
450 textarea: ta,
451 keyMap: DefaultEditorKeyMap(),
452 }
453}