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
|
package widgets
import (
"bytes"
"fmt"
"io"
"os/exec"
"github.com/danwakefield/fnmatch"
"github.com/emersion/go-imap"
"github.com/emersion/go-message"
"github.com/emersion/go-message/mail"
"github.com/gdamore/tcell"
"github.com/google/shlex"
"github.com/mattn/go-runewidth"
"git.sr.ht/~sircmpwn/aerc2/config"
"git.sr.ht/~sircmpwn/aerc2/lib"
"git.sr.ht/~sircmpwn/aerc2/lib/ui"
"git.sr.ht/~sircmpwn/aerc2/worker/types"
)
type MessageViewer struct {
conf *config.AercConfig
filter *exec.Cmd
msg *types.MessageInfo
pager *exec.Cmd
source io.Reader
pagerin io.WriteCloser
sink io.WriteCloser
grid *ui.Grid
term *Terminal
}
func formatAddresses(addrs []*imap.Address) string {
val := bytes.Buffer{}
for i, addr := range addrs {
if addr.PersonalName != "" {
val.WriteString(fmt.Sprintf("%s <%s@%s>",
addr.PersonalName, addr.MailboxName, addr.HostName))
} else {
val.WriteString(fmt.Sprintf("%s@%s",
addr.MailboxName, addr.HostName))
}
if i != len(addrs)-1 {
val.WriteString(", ")
}
}
return val.String()
}
func NewMessageViewer(conf *config.AercConfig, store *lib.MessageStore,
msg *types.MessageInfo) *MessageViewer {
grid := ui.NewGrid().Rows([]ui.GridSpec{
{ui.SIZE_EXACT, 3}, // TODO: Based on number of header rows
{ui.SIZE_WEIGHT, 1},
}).Columns([]ui.GridSpec{
{ui.SIZE_WEIGHT, 1},
})
// TODO: let user specify additional headers to show by default
headers := ui.NewGrid().Rows([]ui.GridSpec{
{ui.SIZE_EXACT, 1},
{ui.SIZE_EXACT, 1},
{ui.SIZE_EXACT, 1},
}).Columns([]ui.GridSpec{
{ui.SIZE_WEIGHT, 1},
{ui.SIZE_WEIGHT, 1},
})
headers.AddChild(
&HeaderView{
Name: "From",
Value: formatAddresses(msg.Envelope.From),
}).At(0, 0)
headers.AddChild(
&HeaderView{
Name: "To",
Value: formatAddresses(msg.Envelope.To),
}).At(0, 1)
headers.AddChild(
&HeaderView{
Name: "Subject",
Value: msg.Envelope.Subject,
}).At(1, 0).Span(1, 2)
headers.AddChild(ui.NewFill(' ')).At(2, 0).Span(1, 2)
body := ui.NewGrid().Rows([]ui.GridSpec{
{ui.SIZE_WEIGHT, 1},
}).Columns([]ui.GridSpec{
{ui.SIZE_WEIGHT, 1},
{ui.SIZE_EXACT, 20},
})
var (
filter *exec.Cmd
pager *exec.Cmd
pipe io.WriteCloser
pagerin io.WriteCloser
)
cmd, err := shlex.Split(conf.Viewer.Pager)
if err != nil {
panic(err) // TODO: something useful
}
pager = exec.Command(cmd[0], cmd[1:]...)
for _, f := range conf.Filters {
cmd, err := shlex.Split(f.Command)
if err != nil {
panic(err) // TODO: Something useful
}
mime := msg.BodyStructure.MIMEType + "/" + msg.BodyStructure.MIMESubType
switch f.FilterType {
case config.FILTER_MIMETYPE:
if fnmatch.Match(f.Filter, mime, 0) {
filter = exec.Command(cmd[0], cmd[1:]...)
fmt.Printf("Using filter for %s: %s\n", mime, f.Command)
}
}
}
if filter != nil {
pipe, _ = filter.StdinPipe()
pagerin, _ = pager.StdinPipe()
} else {
pipe, _ = pager.StdinPipe()
}
term, _ := NewTerminal(pager)
// TODO: configure multipart view. I left a spot for it in the grid
body.AddChild(term).At(0, 0).Span(1, 2)
grid.AddChild(headers).At(0, 0)
grid.AddChild(body).At(1, 0)
viewer := &MessageViewer{
filter: filter,
grid: grid,
msg: msg,
pager: pager,
pagerin: pagerin,
sink: pipe,
term: term,
}
store.FetchBodyPart(msg.Uid, 0, func(reader io.Reader) {
viewer.source = reader
viewer.attemptCopy()
})
term.OnStart = func() {
viewer.attemptCopy()
}
return viewer
}
func (mv *MessageViewer) attemptCopy() {
if mv.source != nil && mv.pager.Process != nil {
header := make(message.Header)
header.Set("Content-Transfer-Encoding", mv.msg.BodyStructure.Encoding)
header.SetContentType(
mv.msg.BodyStructure.MIMEType, mv.msg.BodyStructure.Params)
header.SetContentDescription(mv.msg.BodyStructure.Description)
if mv.filter != nil {
stdout, _ := mv.filter.StdoutPipe()
mv.filter.Start()
go func() {
_, err := io.Copy(mv.pagerin, stdout)
if err != nil {
io.WriteString(mv.sink, err.Error())
}
}()
}
go func() {
entity, err := message.New(header, mv.source)
if err != nil {
io.WriteString(mv.sink, err.Error())
return
}
reader := mail.NewReader(entity)
part, err := reader.NextPart()
if err != nil {
io.WriteString(mv.sink, err.Error())
return
}
io.Copy(mv.sink, part.Body)
mv.sink.Close()
}()
}
}
func (mv *MessageViewer) Draw(ctx *ui.Context) {
mv.grid.Draw(ctx)
}
func (mv *MessageViewer) Invalidate() {
mv.grid.Invalidate()
}
func (mv *MessageViewer) OnInvalidate(fn func(d ui.Drawable)) {
mv.grid.OnInvalidate(func(_ ui.Drawable) {
fn(mv)
})
}
func (mv *MessageViewer) Event(event tcell.Event) bool {
return mv.term.Event(event)
}
func (mv *MessageViewer) Focus(focus bool) {
mv.term.Focus(focus)
}
type HeaderView struct {
onInvalidate func(d ui.Drawable)
Name string
Value string
}
func (hv *HeaderView) Draw(ctx *ui.Context) {
name := hv.Name
size := runewidth.StringWidth(name)
lim := ctx.Width() - size - 1
value := runewidth.Truncate(" "+hv.Value, lim, "…")
var (
hstyle tcell.Style
vstyle tcell.Style
)
// TODO: Make this more robust and less dumb
if hv.Name == "PGP" {
vstyle = tcell.StyleDefault.Foreground(tcell.ColorGreen)
hstyle = tcell.StyleDefault.Bold(true)
} else {
vstyle = tcell.StyleDefault
hstyle = tcell.StyleDefault.Bold(true)
}
ctx.Fill(0, 0, ctx.Width(), ctx.Height(), ' ', vstyle)
ctx.Printf(0, 0, hstyle, name)
ctx.Printf(size, 0, vstyle, value)
}
func (hv *HeaderView) Invalidate() {
if hv.onInvalidate != nil {
hv.onInvalidate(hv)
}
}
func (hv *HeaderView) OnInvalidate(fn func(d ui.Drawable)) {
hv.onInvalidate = fn
}
type MultipartView struct {
onInvalidate func(d ui.Drawable)
}
func (mpv *MultipartView) Draw(ctx *ui.Context) {
ctx.Fill(0, 0, ctx.Width(), ctx.Height(), ' ', tcell.StyleDefault)
ctx.Fill(0, 0, ctx.Width(), 1, ' ', tcell.StyleDefault.Reverse(true))
ctx.Printf(0, 0, tcell.StyleDefault.Reverse(true), "text/plain")
ctx.Printf(0, 1, tcell.StyleDefault, "text/html")
ctx.Printf(0, 2, tcell.StyleDefault, "application/pgp-si…")
}
func (mpv *MultipartView) Invalidate() {
if mpv.onInvalidate != nil {
mpv.onInvalidate(mpv)
}
}
func (mpv *MultipartView) OnInvalidate(fn func(d ui.Drawable)) {
mpv.onInvalidate = fn
}
|