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
|
package widgets
import (
"os/exec"
"sync/atomic"
"git.sr.ht/~rjarry/aerc/config"
"git.sr.ht/~rjarry/aerc/lib/ui"
"git.sr.ht/~rjarry/aerc/log"
tcellterm "git.sr.ht/~rockorager/tcell-term"
"github.com/gdamore/tcell/v2"
)
type Terminal struct {
closed int32
cmd *exec.Cmd
ctx *ui.Context
focus bool
visible bool
vterm *tcellterm.VT
running bool
OnClose func(err error)
OnEvent func(event tcell.Event) bool
OnStart func()
OnTitle func(title string)
}
func NewTerminal(cmd *exec.Cmd) (*Terminal, error) {
term := &Terminal{
cmd: cmd,
vterm: tcellterm.New(),
visible: true,
}
term.vterm.OSC8 = config.General.EnableOSC8
term.vterm.TERM = config.General.Term
return term, nil
}
func (term *Terminal) Close() {
term.closeErr(nil)
}
// TODO: replace with atomic.Bool when min go version will have it (1.19+)
const closed int32 = 1
func (term *Terminal) isClosed() bool {
return atomic.LoadInt32(&term.closed) == closed
}
func (term *Terminal) closeErr(err error) {
if atomic.SwapInt32(&term.closed, closed) == closed {
return
}
if term.vterm != nil {
// Stop receiving events
term.vterm.Detach()
term.vterm.Close()
}
if term.OnClose != nil {
term.OnClose(err)
}
ui.Invalidate()
}
func (term *Terminal) Destroy() {
// If we destroy, we don't want to call the OnClose callback
term.OnClose = nil
term.closeErr(nil)
}
func (term *Terminal) Invalidate() {
ui.Invalidate()
}
func (term *Terminal) Draw(ctx *ui.Context) {
term.vterm.SetSurface(ctx.View())
w, h := ctx.View().Size()
if !term.isClosed() && term.ctx != nil {
ow, oh := term.ctx.View().Size()
if w != ow || h != oh {
term.vterm.Resize(w, h)
}
}
term.ctx = ctx
if !term.running && term.cmd != nil {
term.vterm.Attach(term.HandleEvent)
if err := term.vterm.Start(term.cmd); err != nil {
log.Errorf("error running terminal: %v", err)
term.closeErr(err)
return
}
term.running = true
if term.OnStart != nil {
term.OnStart()
}
}
term.vterm.Draw()
if term.focus {
y, x, style, vis := term.vterm.Cursor()
if vis && !term.isClosed() {
ctx.SetCursor(x, y)
ctx.SetCursorStyle(style)
} else {
ctx.HideCursor()
}
}
}
func (term *Terminal) Show(visible bool) {
term.visible = visible
}
func (term *Terminal) MouseEvent(localX int, localY int, event tcell.Event) {
ev, ok := event.(*tcell.EventMouse)
if !ok {
return
}
if term.OnEvent != nil {
term.OnEvent(ev)
}
if term.isClosed() {
return
}
e := tcell.NewEventMouse(localX, localY, ev.Buttons(), ev.Modifiers())
term.vterm.HandleEvent(e)
}
func (term *Terminal) Focus(focus bool) {
if term.isClosed() {
return
}
term.focus = focus
if term.ctx != nil {
if !term.focus {
term.ctx.HideCursor()
} else {
y, x, style, _ := term.vterm.Cursor()
term.ctx.SetCursor(x, y)
term.ctx.SetCursorStyle(style)
term.Invalidate()
}
}
}
// HandleEvent is used to watch the underlying terminal events
func (term *Terminal) HandleEvent(ev tcell.Event) {
if term.isClosed() {
return
}
switch ev := ev.(type) {
case *tcellterm.EventRedraw:
if term.visible {
ui.Invalidate()
}
case *tcellterm.EventTitle:
if term.OnTitle != nil {
term.OnTitle(ev.Title())
}
case *tcellterm.EventClosed:
term.Close()
ui.Invalidate()
}
}
func (term *Terminal) Event(event tcell.Event) bool {
if term.OnEvent != nil {
if term.OnEvent(event) {
return true
}
}
if term.isClosed() {
return false
}
return term.vterm.HandleEvent(event)
}
|
