aboutsummaryrefslogtreecommitdiffstats
path: root/widgets/msglist.go
blob: 28eec0c9aa4eadc0b0e8cd479018e386bfe43299 (plain) (blame)
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
package widgets

import (
	"log"

	"github.com/gdamore/tcell"

	"git.sr.ht/~sircmpwn/aerc2/config"
	"git.sr.ht/~sircmpwn/aerc2/lib"
	"git.sr.ht/~sircmpwn/aerc2/lib/ui"
)

type MessageList struct {
	conf         *config.AercConfig
	logger       *log.Logger
	height       int
	onInvalidate func(d ui.Drawable)
	scroll       int
	selected     int
	spinner      *Spinner
	store        *lib.MessageStore
}

// TODO: fish in config
func NewMessageList(logger *log.Logger) *MessageList {
	ml := &MessageList{
		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) OnInvalidate(onInvalidate func(d ui.Drawable)) {
	ml.onInvalidate = onInvalidate
}

func (ml *MessageList) Invalidate() {
	if ml.onInvalidate != nil {
		ml.onInvalidate(ml)
	}
}

func (ml *MessageList) Draw(ctx *ui.Context) {
	ml.height = ctx.Height()
	ctx.Fill(0, 0, ctx.Width(), ctx.Height(), ' ', tcell.StyleDefault)

	if ml.store == nil {
		ml.spinner.Draw(ctx)
		return
	}

	var (
		needsHeaders []uint32
		row          int = 0
	)

	for i := len(ml.store.Uids) - 1 - ml.scroll; i >= 0; i-- {
		uid := ml.store.Uids[i]
		msg := ml.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.Background(tcell.ColorWhite).
				Foreground(tcell.ColorBlack)
		}
		ctx.Fill(0, row, ctx.Width(), 1, ' ', style)
		ctx.Printf(0, row, style, "%s", msg.Envelope.Subject)

		row += 1
	}

	if len(needsHeaders) != 0 {
		ml.store.FetchHeaders(needsHeaders)
		ml.spinner.Start()
	} else {
		ml.spinner.Stop()
	}
}

func (ml *MessageList) Height() int {
	return ml.height
}

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()
	} else {
		ml.spinner.Start()
	}
	ml.Invalidate()
}

func (ml *MessageList) nextPrev(delta int) {
	ml.selected += delta
	if ml.selected < 0 {
		ml.selected = 0
	}
	if ml.selected >= len(ml.store.Uids) {
		ml.selected = len(ml.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)
}