~sircmpwn/aerc

aerc/widgets/aerc.go -rw-r--r-- 14.3 KiB
0b19b5e7Adnan Maolood lib/ui/textinput: Optimize ensureScroll 3 months ago
                                                                                
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
package widgets

import (
	"errors"
	"fmt"
	"io"
	"log"
	"net/url"
	"strings"
	"time"

	"github.com/emersion/go-message/mail"
	"github.com/gdamore/tcell/v2"
	"github.com/google/shlex"
	"golang.org/x/crypto/openpgp"

	"git.sr.ht/~sircmpwn/aerc/config"
	"git.sr.ht/~sircmpwn/aerc/lib"
	"git.sr.ht/~sircmpwn/aerc/lib/ui"
	"git.sr.ht/~sircmpwn/aerc/models"
)

type Aerc struct {
	accounts    map[string]*AccountView
	cmd         func(cmd []string) error
	cmdHistory  lib.History
	complete    func(cmd string) []string
	conf        *config.AercConfig
	focused     ui.Interactive
	grid        *ui.Grid
	logger      *log.Logger
	simulating  int
	statusbar   *ui.Stack
	statusline  *StatusLine
	pendingKeys []config.KeyStroke
	prompts     *ui.Stack
	tabs        *ui.Tabs
	ui          *ui.UI
	beep        func() error
	dialog      ui.DrawableInteractive
}

type Choice struct {
	Key     string
	Text    string
	Command []string
}

func NewAerc(conf *config.AercConfig, logger *log.Logger,
	cmd func(cmd []string) error, complete func(cmd string) []string,
	cmdHistory lib.History) *Aerc {

	tabs := ui.NewTabs(&conf.Ui)

	statusbar := ui.NewStack(conf.Ui)
	statusline := NewStatusLine(conf.Ui)
	statusbar.Push(statusline)

	grid := ui.NewGrid().Rows([]ui.GridSpec{
		{ui.SIZE_EXACT, ui.Const(1)},
		{ui.SIZE_WEIGHT, ui.Const(1)},
		{ui.SIZE_EXACT, ui.Const(1)},
	}).Columns([]ui.GridSpec{
		{ui.SIZE_WEIGHT, ui.Const(1)},
	})
	grid.AddChild(tabs.TabStrip)
	grid.AddChild(tabs.TabContent).At(1, 0)
	grid.AddChild(statusbar).At(2, 0)

	aerc := &Aerc{
		accounts:   make(map[string]*AccountView),
		conf:       conf,
		cmd:        cmd,
		cmdHistory: cmdHistory,
		complete:   complete,
		grid:       grid,
		logger:     logger,
		statusbar:  statusbar,
		statusline: statusline,
		prompts:    ui.NewStack(conf.Ui),
		tabs:       tabs,
	}

	statusline.SetAerc(aerc)
	conf.Triggers.ExecuteCommand = cmd

	for i, acct := range conf.Accounts {
		view, err := NewAccountView(aerc, conf, &conf.Accounts[i], logger, aerc)
		if err != nil {
			tabs.Add(errorScreen(err.Error(), conf.Ui), acct.Name)
		} else {
			aerc.accounts[acct.Name] = view
			tabs.Add(view, acct.Name)
		}
	}

	if len(conf.Accounts) == 0 {
		wizard := NewAccountWizard(aerc.Config(), aerc)
		wizard.Focus(true)
		aerc.NewTab(wizard, "New account")
	}

	tabs.CloseTab = func(index int) {
		switch content := aerc.tabs.Tabs[index].Content.(type) {
		case *AccountView:
			return
		case *AccountWizard:
			return
		case *Composer:
			aerc.RemoveTab(content)
			content.Close()
		case *Terminal:
			content.Close(nil)
		case *MessageViewer:
			aerc.RemoveTab(content)
		}
	}

	return aerc
}

func (aerc *Aerc) OnBeep(f func() error) {
	aerc.beep = f
}

func (aerc *Aerc) Beep() {
	if aerc.beep == nil {
		aerc.logger.Printf("should beep, but no beeper")
		return
	}
	if err := aerc.beep(); err != nil {
		aerc.logger.Printf("tried to beep, but could not: %v", err)
	}
}

func (aerc *Aerc) Tick() bool {
	more := false
	for _, acct := range aerc.accounts {
		more = acct.Tick() || more
	}

	if len(aerc.prompts.Children()) > 0 {
		more = true
		previous := aerc.focused
		prompt := aerc.prompts.Pop().(*ExLine)
		prompt.finish = func() {
			aerc.statusbar.Pop()
			aerc.focus(previous)
		}

		aerc.statusbar.Push(prompt)
		aerc.focus(prompt)
	}

	return more
}

func (aerc *Aerc) Children() []ui.Drawable {
	return aerc.grid.Children()
}

func (aerc *Aerc) OnInvalidate(onInvalidate func(d ui.Drawable)) {
	aerc.grid.OnInvalidate(func(_ ui.Drawable) {
		onInvalidate(aerc)
	})
}

func (aerc *Aerc) Invalidate() {
	aerc.grid.Invalidate()
}

func (aerc *Aerc) Focus(focus bool) {
	// who cares
}

func (aerc *Aerc) Draw(ctx *ui.Context) {
	aerc.grid.Draw(ctx)
	if aerc.dialog != nil {
		aerc.dialog.Draw(ctx.Subcontext(4, ctx.Height()/2-2,
			ctx.Width()-8, 4))
	}
}

func (aerc *Aerc) getBindings() *config.KeyBindings {
	switch view := aerc.SelectedTab().(type) {
	case *AccountView:
		return aerc.conf.Bindings.MessageList
	case *AccountWizard:
		return aerc.conf.Bindings.AccountWizard
	case *Composer:
		switch view.Bindings() {
		case "compose::editor":
			return aerc.conf.Bindings.ComposeEditor
		case "compose::review":
			return aerc.conf.Bindings.ComposeReview
		default:
			return aerc.conf.Bindings.Compose
		}
	case *MessageViewer:
		return aerc.conf.Bindings.MessageView
	case *Terminal:
		return aerc.conf.Bindings.Terminal
	default:
		return aerc.conf.Bindings.Global
	}
}

func (aerc *Aerc) simulate(strokes []config.KeyStroke) {
	aerc.pendingKeys = []config.KeyStroke{}
	aerc.simulating += 1
	for _, stroke := range strokes {
		simulated := tcell.NewEventKey(
			stroke.Key, stroke.Rune, tcell.ModNone)
		aerc.Event(simulated)
	}
	aerc.simulating -= 1
}

func (aerc *Aerc) Event(event tcell.Event) bool {
	if aerc.dialog != nil {
		return aerc.dialog.Event(event)
	}

	if aerc.focused != nil {
		return aerc.focused.Event(event)
	}

	switch event := event.(type) {
	case *tcell.EventKey:
		aerc.statusline.Expire()
		aerc.pendingKeys = append(aerc.pendingKeys, config.KeyStroke{
			Key:  event.Key(),
			Rune: event.Rune(),
		})
		aerc.statusline.Invalidate()
		bindings := aerc.getBindings()
		incomplete := false
		result, strokes := bindings.GetBinding(aerc.pendingKeys)
		switch result {
		case config.BINDING_FOUND:
			aerc.simulate(strokes)
			return true
		case config.BINDING_INCOMPLETE:
			incomplete = true
		case config.BINDING_NOT_FOUND:
		}
		if bindings.Globals {
			result, strokes = aerc.conf.Bindings.Global.
				GetBinding(aerc.pendingKeys)
			switch result {
			case config.BINDING_FOUND:
				aerc.simulate(strokes)
				return true
			case config.BINDING_INCOMPLETE:
				incomplete = true
			case config.BINDING_NOT_FOUND:
			}
		}
		if !incomplete {
			aerc.pendingKeys = []config.KeyStroke{}
			exKey := bindings.ExKey
			if aerc.simulating > 0 {
				// Keybindings still use : even if you change the ex key
				exKey = aerc.conf.Bindings.Global.ExKey
			}
			if event.Key() == exKey.Key && event.Rune() == exKey.Rune {
				aerc.BeginExCommand("")
				return true
			}
			interactive, ok := aerc.tabs.Tabs[aerc.tabs.Selected].Content.(ui.Interactive)
			if ok {
				return interactive.Event(event)
			}
			return false
		}
	case *tcell.EventMouse:
		if event.Buttons() == tcell.ButtonNone {
			return false
		}
		x, y := event.Position()
		aerc.grid.MouseEvent(x, y, event)
		return true
	}
	return false
}

func (aerc *Aerc) Config() *config.AercConfig {
	return aerc.conf
}

func (aerc *Aerc) Logger() *log.Logger {
	return aerc.logger
}

func (aerc *Aerc) SelectedAccount() *AccountView {
	switch tab := aerc.SelectedTab().(type) {
	case *AccountView:
		return tab
	case *MessageViewer:
		return tab.SelectedAccount()
	case *Composer:
		return tab.Account()
	}
	return nil
}

func (aerc *Aerc) SelectedTab() ui.Drawable {
	return aerc.tabs.Tabs[aerc.tabs.Selected].Content
}

func (aerc *Aerc) SelectedTabIndex() int {
	return aerc.tabs.Selected
}

func (aerc *Aerc) NumTabs() int {
	return len(aerc.tabs.Tabs)
}

func (aerc *Aerc) NewTab(clickable ui.Drawable, name string) *ui.Tab {
	tab := aerc.tabs.Add(clickable, name)
	aerc.tabs.Select(len(aerc.tabs.Tabs) - 1)
	return tab
}

func (aerc *Aerc) RemoveTab(tab ui.Drawable) {
	aerc.tabs.Remove(tab)
}

func (aerc *Aerc) ReplaceTab(tabSrc ui.Drawable, tabTarget ui.Drawable, name string) {
	aerc.tabs.Replace(tabSrc, tabTarget, name)
}

func (aerc *Aerc) MoveTab(i int) {
	aerc.tabs.MoveTab(i)
}

func (aerc *Aerc) PinTab() {
	aerc.tabs.PinTab()
}

func (aerc *Aerc) UnpinTab() {
	aerc.tabs.UnpinTab()
}

func (aerc *Aerc) NextTab() {
	aerc.tabs.NextTab()
}

func (aerc *Aerc) PrevTab() {
	aerc.tabs.PrevTab()
}

func (aerc *Aerc) SelectTab(name string) bool {
	for i, tab := range aerc.tabs.Tabs {
		if tab.Name == name {
			aerc.tabs.Select(i)
			return true
		}
	}
	return false
}

func (aerc *Aerc) SelectTabIndex(index int) bool {
	for i := range aerc.tabs.Tabs {
		if i == index {
			aerc.tabs.Select(i)
			return true
		}
	}
	return false
}

func (aerc *Aerc) TabNames() []string {
	var names []string
	for _, tab := range aerc.tabs.Tabs {
		names = append(names, tab.Name)
	}
	return names
}

func (aerc *Aerc) SelectPreviousTab() bool {
	return aerc.tabs.SelectPrevious()
}

// TODO: Use per-account status lines, but a global ex line
func (aerc *Aerc) SetStatus(status string) *StatusMessage {
	return aerc.statusline.Set(status)
}

func (aerc *Aerc) SetError(status string) *StatusMessage {
	return aerc.statusline.SetError(status)
}

func (aerc *Aerc) PushStatus(text string, expiry time.Duration) *StatusMessage {
	return aerc.statusline.Push(text, expiry)
}

func (aerc *Aerc) PushError(text string) *StatusMessage {
	return aerc.statusline.PushError(text)
}

func (aerc *Aerc) PushSuccess(text string) *StatusMessage {
	return aerc.statusline.PushSuccess(text)
}

func (aerc *Aerc) focus(item ui.Interactive) {
	if aerc.focused == item {
		return
	}
	if aerc.focused != nil {
		aerc.focused.Focus(false)
	}
	aerc.focused = item
	interactive, ok := aerc.tabs.Tabs[aerc.tabs.Selected].Content.(ui.Interactive)
	if item != nil {
		item.Focus(true)
		if ok {
			interactive.Focus(false)
		}
	} else {
		if ok {
			interactive.Focus(true)
		}
	}
}

func (aerc *Aerc) BeginExCommand(cmd string) {
	previous := aerc.focused
	exline := NewExLine(aerc.conf, cmd, func(cmd string) {
		parts, err := shlex.Split(cmd)
		if err != nil {
			aerc.PushError(err.Error())
		}
		err = aerc.cmd(parts)
		if err != nil {
			aerc.PushError(err.Error())
		}
		// only add to history if this is an unsimulated command,
		// ie one not executed from a keybinding
		if aerc.simulating == 0 {
			aerc.cmdHistory.Add(cmd)
		}
	}, func() {
		aerc.statusbar.Pop()
		aerc.focus(previous)
	}, func(cmd string) []string {
		return aerc.complete(cmd)
	}, aerc.cmdHistory)
	aerc.statusbar.Push(exline)
	aerc.focus(exline)
}

func (aerc *Aerc) RegisterPrompt(prompt string, cmd []string) {
	p := NewPrompt(aerc.conf, prompt, func(text string) {
		if text != "" {
			cmd = append(cmd, text)
		}
		err := aerc.cmd(cmd)
		if err != nil {
			aerc.PushError(err.Error())
		}
	}, func(cmd string) []string {
		return nil // TODO: completions
	})
	aerc.prompts.Push(p)
}

func (aerc *Aerc) RegisterChoices(choices []Choice) {
	cmds := make(map[string][]string)
	texts := []string{}
	for _, c := range choices {
		text := fmt.Sprintf("[%s] %s", c.Key, c.Text)
		if strings.Contains(c.Text, c.Key) {
			text = strings.Replace(c.Text, c.Key, "["+c.Key+"]", 1)
		}
		texts = append(texts, text)
		cmds[c.Key] = c.Command
	}
	prompt := strings.Join(texts, ", ") + "? "
	p := NewPrompt(aerc.conf, prompt, func(text string) {
		cmd, ok := cmds[text]
		if !ok {
			return
		}
		err := aerc.cmd(cmd)
		if err != nil {
			aerc.PushError(err.Error())
		}
	}, func(cmd string) []string {
		return nil // TODO: completions
	})
	aerc.prompts.Push(p)
}

func (aerc *Aerc) Mailto(addr *url.URL) error {
	acct := aerc.SelectedAccount()
	if acct == nil {
		return errors.New("No account selected")
	}

	var subject string
	h := &mail.Header{}
	to, err := mail.ParseAddressList(addr.Opaque)
	if err != nil {
		return fmt.Errorf("Could not parse to: %v", err)
	}
	h.SetAddressList("to", to)
	for key, vals := range addr.Query() {
		switch strings.ToLower(key) {
		case "cc":
			list, err := mail.ParseAddressList(strings.Join(vals, ","))
			if err != nil {
				break
			}
			h.SetAddressList("Cc", list)
		case "in-reply-to":
			for i, msgID := range vals {
				if len(msgID) > 1 && msgID[0] == '<' &&
					msgID[len(msgID)-1] == '>' {
					vals[i] = msgID[1 : len(msgID)-1]
				}
			}
			h.SetMsgIDList("In-Reply-To", vals)
		case "subject":
			subject = strings.Join(vals, ",")
			h.SetText("Subject", subject)
		default:
			// any other header gets ignored on purpose to avoid control headers
			// being injected
		}
	}

	composer, err := NewComposer(aerc, acct, aerc.Config(),
		acct.AccountConfig(), acct.Worker(), "", h, models.OriginalMail{})
	if err != nil {
		return nil
	}
	composer.FocusSubject()
	title := "New email"
	if subject != "" {
		title = subject
		composer.FocusTerminal()
	}
	tab := aerc.NewTab(composer, title)
	composer.OnHeaderChange("Subject", func(subject string) {
		if subject == "" {
			tab.Name = "New email"
		} else {
			tab.Name = subject
		}
		tab.Content.Invalidate()
	})
	return nil
}

func (aerc *Aerc) CloseBackends() error {
	var returnErr error
	for _, acct := range aerc.accounts {
		var raw interface{} = acct.worker.Backend
		c, ok := raw.(io.Closer)
		if !ok {
			continue
		}
		err := c.Close()
		if err != nil {
			returnErr = err
			aerc.logger.Printf("Closing backend failed for %v: %v\n",
				acct.Name(), err)
		}
	}
	return returnErr
}

func (aerc *Aerc) AddDialog(d ui.DrawableInteractive) {
	aerc.dialog = d
	aerc.dialog.OnInvalidate(func(_ ui.Drawable) {
		aerc.Invalidate()
	})
	aerc.Invalidate()
	return
}

func (aerc *Aerc) CloseDialog() {
	aerc.dialog = nil
	aerc.Invalidate()
	return
}

func (aerc *Aerc) GetPassword(title string, prompt string) (chText chan string, chErr chan error) {
	chText = make(chan string, 1)
	chErr = make(chan error, 1)
	getPasswd := NewGetPasswd(title, prompt, aerc.conf, func(pw string, err error) {
		defer func() {
			close(chErr)
			close(chText)
			aerc.CloseDialog()
		}()
		if err != nil {
			chErr <- err
			return
		}
		chErr <- nil
		chText <- pw
		return
	})
	aerc.AddDialog(getPasswd)

	return
}

func (aerc *Aerc) Initialize(ui *ui.UI) {
	aerc.ui = ui
}

func (aerc *Aerc) DecryptKeys(keys []openpgp.Key, symmetric bool) (b []byte, err error) {
	for _, key := range keys {
		ident := key.Entity.PrimaryIdentity()
		chPass, chErr := aerc.GetPassword("Decrypt PGP private key",
			fmt.Sprintf("Enter password for %s (%8X)\nPress <ESC> to cancel",
				ident.Name, key.PublicKey.KeyId))

		for {
			select {
			case err = <-chErr:
				if err != nil {
					return nil, err
				}
				pass := <-chPass
				err = key.PrivateKey.Decrypt([]byte(pass))
				return nil, err
			default:
				aerc.ui.Tick()
			}
		}
	}
	return nil, err
}

// errorScreen is a widget that draws an error in the middle of the context
func errorScreen(s string, conf config.UIConfig) ui.Drawable {
	errstyle := conf.GetStyle(config.STYLE_ERROR)
	text := ui.NewText(s, errstyle).Strategy(ui.TEXT_CENTER)
	grid := ui.NewGrid().Rows([]ui.GridSpec{
		{ui.SIZE_WEIGHT, ui.Const(1)},
		{ui.SIZE_EXACT, ui.Const(1)},
		{ui.SIZE_WEIGHT, ui.Const(1)},
	}).Columns([]ui.GridSpec{
		{ui.SIZE_WEIGHT, ui.Const(1)},
	})
	grid.AddChild(ui.NewFill(' ')).At(0, 0)
	grid.AddChild(text).At(1, 0)
	grid.AddChild(ui.NewFill(' ')).At(2, 0)
	return grid
}