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
|
package widgets
import (
"log"
"github.com/gdamore/tcell"
"git.sr.ht/~sircmpwn/aerc/config"
"git.sr.ht/~sircmpwn/aerc/lib"
"git.sr.ht/~sircmpwn/aerc/lib/ui"
"git.sr.ht/~sircmpwn/aerc/worker/types"
)
type MessageList struct {
ui.Invalidatable
conf *config.AercConfig
logger *log.Logger
height int
scroll int
selected int
nmsgs int
spinner *Spinner
store *lib.MessageStore
}
func NewMessageList(conf *config.AercConfig, logger *log.Logger) *MessageList {
ml := &MessageList{
conf: conf,
logger: logger,
selected: 0,
spinner: NewSpinner(),
}
ml.spinner.OnInvalidate(func(_ ui.Drawable) {
ml.Invalidate()
})
// TODO: stop spinner, probably
ml.spinner.Start()
return ml
}
func (ml *MessageList) Invalidate() {
ml.DoInvalidate(ml)
}
func (ml *MessageList) Draw(ctx *ui.Context) {
ml.height = ctx.Height()
ctx.Fill(0, 0, ctx.Width(), ctx.Height(), ' ', tcell.StyleDefault)
store := ml.Store()
if store == nil {
ml.spinner.Draw(ctx)
return
}
var (
needsHeaders []uint32
row int = 0
)
for i := len(store.Uids) - 1 - ml.scroll; i >= 0; i-- {
uid := store.Uids[i]
msg := store.Messages[uid]
if row >= ctx.Height() {
break
}
if msg == nil {
needsHeaders = append(needsHeaders, uid)
ml.spinner.Draw(ctx.Subcontext(0, row, ctx.Width(), 1))
row += 1
continue
}
style := tcell.StyleDefault
if row == ml.selected-ml.scroll {
style = style.Reverse(true)
}
if _, ok := store.Deleted[msg.Uid]; ok {
style = style.Foreground(tcell.ColorGray)
}
ctx.Fill(0, row, ctx.Width(), 1, ' ', style)
ctx.Printf(0, row, style, "%s", msg.Envelope.Subject)
row += 1
}
if len(store.Uids) == 0 {
msg := ml.conf.Ui.EmptyMessage
ctx.Printf((ctx.Width()/2)-(len(msg)/2), 0,
tcell.StyleDefault, "%s", msg)
}
if len(needsHeaders) != 0 {
store.FetchHeaders(needsHeaders, nil)
ml.spinner.Start()
} else {
ml.spinner.Stop()
}
}
func (ml *MessageList) Height() int {
return ml.height
}
func (ml *MessageList) storeUpdate(store *lib.MessageStore) {
if ml.Store() != store {
return
}
if len(store.Uids) > 0 {
// Prevent selecting beyond the last message
for ml.selected >= len(store.Uids) {
ml.Prev()
}
// When new messages come in, advance the cursor accordingly
// Note that this assumes new messages are appended to the top, which
// isn't necessarily true once we implement SORT... ideally we'd look
// for the previously selected UID.
if len(store.Uids) > ml.nmsgs && ml.nmsgs != 0 {
for i := 0; i < len(store.Uids)-ml.nmsgs; i++ {
ml.Next()
}
}
ml.nmsgs = len(store.Uids)
}
ml.Invalidate()
}
func (ml *MessageList) SetStore(store *lib.MessageStore) {
if ml.Store() == store {
ml.scroll = 0
ml.selected = 0
}
ml.store = store
if store != nil {
ml.spinner.Stop()
ml.nmsgs = len(store.Uids)
store.OnUpdate(ml.storeUpdate)
} else {
ml.spinner.Start()
}
ml.Invalidate()
}
func (ml *MessageList) Store() *lib.MessageStore {
return ml.store
}
func (ml *MessageList) Empty() bool {
store := ml.Store()
return store == nil || len(store.Uids) == 0
}
func (ml *MessageList) Selected() *types.MessageInfo {
store := ml.Store()
return store.Messages[store.Uids[len(store.Uids)-ml.selected-1]]
}
func (ml *MessageList) Select(index int) {
store := ml.Store()
ml.selected = index
for ; ml.selected < 0; ml.selected = len(store.Uids) + ml.selected {
}
if ml.selected > len(store.Uids) {
ml.selected = len(store.Uids)
}
// I'm too lazy to do the math right now
for ml.selected-ml.scroll >= ml.Height() {
ml.scroll += 1
}
for ml.selected-ml.scroll < 0 {
ml.scroll -= 1
}
}
func (ml *MessageList) nextPrev(delta int) {
store := ml.Store()
if store == nil || len(store.Uids) == 0 {
return
}
ml.selected += delta
if ml.selected < 0 {
ml.selected = 0
}
if ml.selected >= len(store.Uids) {
ml.selected = len(store.Uids) - 1
}
if ml.Height() != 0 {
if ml.selected-ml.scroll >= ml.Height() {
ml.scroll += 1
} else if ml.selected-ml.scroll < 0 {
ml.scroll -= 1
}
}
ml.Invalidate()
}
func (ml *MessageList) Next() {
ml.nextPrev(1)
}
func (ml *MessageList) Prev() {
ml.nextPrev(-1)
}
|
