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Improve error handling in message viewer 

Still not great but at least it tells you when something went wrong
This commit is contained in:
Drew DeVault 2019-03-31 14:32:26 -04:00
parent bbdf9df75e
commit f9262e4b06
1 changed files with 36 additions and 10 deletions
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46
widgets/msgviewer.go
View File

@ -22,6 +22,7 @@ import (
type MessageViewer struct {
conf *config.AercConfig
err error
filter *exec.Cmd
msg *types.MessageInfo
pager *exec.Cmd
@ -97,17 +98,19 @@ func NewMessageViewer(conf *config.AercConfig, store *lib.MessageStore,
pager *exec.Cmd
pipe io.WriteCloser
pagerin io.WriteCloser
term *Terminal
viewer *MessageViewer
)
cmd, err := shlex.Split(conf.Viewer.Pager)
if err != nil {
panic(err) // TODO: something useful
goto handle_error
}
pager = exec.Command(cmd[0], cmd[1:]...)
for _, f := range conf.Filters {
cmd, err := shlex.Split(f.Command)
cmd, err = shlex.Split(f.Command)
if err != nil {
panic(err) // TODO: Something useful
goto handle_error
}
mime := msg.BodyStructure.MIMEType + "/" + msg.BodyStructure.MIMESubType
switch f.FilterType {
@ -125,14 +128,14 @@ func NewMessageViewer(conf *config.AercConfig, store *lib.MessageStore,
pipe, _ = pager.StdinPipe()
}
term, _ := NewTerminal(pager)
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{
viewer = &MessageViewer{
filter: filter,
grid: grid,
msg: msg,
@ -152,6 +155,14 @@ func NewMessageViewer(conf *config.AercConfig, store *lib.MessageStore,
}
return viewer
handle_error:
viewer = &MessageViewer{
err: err,
grid: grid,
msg: msg,
}
return viewer
}
func (mv *MessageViewer) attemptCopy() {
@ -167,20 +178,25 @@ func (mv *MessageViewer) attemptCopy() {
go func() {
_, err := io.Copy(mv.pagerin, stdout)
if err != nil {
io.WriteString(mv.sink, err.Error())
mv.err = err
mv.Invalidate()
}
mv.pagerin.Close()
stdout.Close()
}()
}
go func() {
entity, err := message.New(header, mv.source)
if err != nil {
io.WriteString(mv.sink, err.Error())
mv.err = err
mv.Invalidate()
return
}
reader := mail.NewReader(entity)
part, err := reader.NextPart()
if err != nil {
io.WriteString(mv.sink, err.Error())
mv.err = err
mv.Invalidate()
return
}
io.Copy(mv.sink, part.Body)
@ -190,6 +206,11 @@ func (mv *MessageViewer) attemptCopy() {
}
func (mv *MessageViewer) Draw(ctx *ui.Context) {
if mv.err != nil {
ctx.Fill(0, 0, ctx.Width(), ctx.Height(), ' ', tcell.StyleDefault)
ctx.Printf(0, 0, tcell.StyleDefault, "%s", mv.err.Error())
return
}
mv.grid.Draw(ctx)
}
@ -204,11 +225,16 @@ func (mv *MessageViewer) OnInvalidate(fn func(d ui.Drawable)) {
}
func (mv *MessageViewer) Event(event tcell.Event) bool {
return mv.term.Event(event)
if mv.term != nil {
return mv.term.Event(event)
}
return false
}
func (mv *MessageViewer) Focus(focus bool) {
mv.term.Focus(focus)
if mv.term != nil {
mv.term.Focus(focus)
}
}
type HeaderView struct {