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
|
package ui
import (
"os"
"os/signal"
"sync/atomic"
"syscall"
"git.sr.ht/~rjarry/aerc/config"
"git.sr.ht/~rjarry/aerc/log"
"git.sr.ht/~rockorager/vaxis"
)
// Use unbuffered channels (always blocking unless somebody can read
// immediately) We are merely using this as a proxy to the internal vaxis event
// channel.
var Events = make(chan vaxis.Event)
var Quit = make(chan struct{})
var Callbacks = make(chan func(), 50)
// QueueFunc queues a function to be called in the main goroutine. This can be
// used to prevent race conditions from delayed functions
func QueueFunc(fn func()) {
Callbacks <- fn
}
// Use a buffered channel of size 1 to avoid blocking callers of Invalidate()
var Redraw = make(chan bool, 1)
// Invalidate marks the entire UI as invalid and request a redraw as soon as
// possible. Invalidate can be called from any goroutine and will never block.
func Invalidate() {
if atomic.SwapUint32(&state.dirty, 1) != 1 {
Redraw <- true
}
}
var state struct {
content DrawableInteractive
ctx *Context
vx *vaxis.Vaxis
popover *Popover
dirty uint32 // == 1 if render has been queued in Redraw channel
// == 1 if suspend is pending
suspending uint32
}
func Initialize(content DrawableInteractive) error {
opts := vaxis.Options{
DisableMouse: !config.Ui.MouseEnabled,
DisableKittyKeyboard: true,
}
vx, err := vaxis.New(opts)
if err != nil {
return err
}
vx.Window().Clear()
vx.HideCursor()
state.content = content
state.vx = vx
state.ctx = NewContext(state.vx, onPopover)
Invalidate()
if beeper, ok := content.(DrawableInteractiveBeeper); ok {
beeper.OnBeep(vx.Bell)
}
content.Focus(true)
go func() {
defer log.PanicHandler()
for event := range vx.Events() {
Events <- event
}
}()
return nil
}
func onPopover(p *Popover) {
state.popover = p
}
func Exit() {
close(Quit)
}
var SuspendQueue = make(chan bool, 1)
func QueueSuspend() {
if atomic.SwapUint32(&state.suspending, 1) != 1 {
SuspendQueue <- true
}
}
func Suspend() error {
var err error
if atomic.SwapUint32(&state.suspending, 0) != 0 {
err = state.vx.Suspend()
if err == nil {
sigcont := make(chan os.Signal, 1)
signal.Notify(sigcont, syscall.SIGCONT)
err = syscall.Kill(0, syscall.SIGTSTP)
if err == nil {
<-sigcont
}
signal.Reset(syscall.SIGCONT)
err = state.vx.Resume()
state.content.Draw(state.ctx)
state.vx.Render()
}
}
return err
}
func Close() {
state.vx.Close()
}
func Render() {
if atomic.SwapUint32(&state.dirty, 0) != 0 {
state.vx.Window().Clear()
// reset popover for the next Draw
state.popover = nil
state.content.Draw(state.ctx)
if state.popover != nil {
// if the Draw resulted in a popover, draw it
state.popover.Draw(state.ctx)
}
state.vx.Render()
}
}
func HandleEvent(event vaxis.Event) {
switch event := event.(type) {
case vaxis.Resize:
state.ctx = NewContext(state.vx, onPopover)
Invalidate()
case vaxis.Redraw:
Invalidate()
default:
// if we have a popover, and it can handle the event, it does so
if state.popover == nil || !state.popover.Event(event) {
// otherwise, we send the event to the main content
state.content.Event(event)
}
}
}
|
