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convscallbacks.go
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convscallbacks.go
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// Copyright 2019-2022 Graham Clark. All rights reserved. Use of this source
// code is governed by the MIT license that can be found in the LICENSE
// file.
// Package ui contains user-interface functions and helpers for termshark.
package ui
import (
"strings"
"time"
"github.com/gcla/gowid"
"github.com/gcla/termshark/v2"
"github.com/gcla/termshark/v2/pkg/pcap"
)
//======================================================================
type IOnDataSync interface {
OnData(data string, app gowid.IApp)
OnCancel(gowid.IApp)
}
type convsParseHandler struct {
app gowid.IApp
tick *time.Ticker // for updating the spinner
stop chan struct{}
ondata IOnDataSync
pleaseWaitClosed bool
}
var _ pcap.IBeforeBegin = (*convsParseHandler)(nil)
var _ pcap.IAfterEnd = (*convsParseHandler)(nil)
func (t *convsParseHandler) OnData(data string) {
data = strings.Replace(data, "\r\n", "\n", -1) // For windows...
if t.ondata != nil {
t.app.Run(gowid.RunFunction(func(app gowid.IApp) {
t.ondata.OnData(data, app)
}))
}
}
func (t *convsParseHandler) AfterDataEnd(success bool) {
if t.ondata != nil && !success {
t.app.Run(gowid.RunFunction(func(app gowid.IApp) {
t.ondata.OnCancel(app)
}))
}
}
func (t *convsParseHandler) BeforeBegin(code pcap.HandlerCode, app gowid.IApp) {
if code&pcap.ConvCode == 0 {
return
}
app.Run(gowid.RunFunction(func(app gowid.IApp) {
OpenPleaseWait(appView, t.app)
}))
t.tick = time.NewTicker(time.Duration(200) * time.Millisecond)
t.stop = make(chan struct{})
termshark.TrackedGo(func() {
Loop:
for {
select {
case <-t.tick.C:
app.Run(gowid.RunFunction(func(app gowid.IApp) {
pleaseWaitSpinner.Update()
}))
case <-t.stop:
break Loop
}
}
}, Goroutinewg)
}
func (t *convsParseHandler) AfterEnd(code pcap.HandlerCode, app gowid.IApp) {
if code&pcap.ConvCode == 0 {
return
}
t.app.Run(gowid.RunFunction(func(app gowid.IApp) {
if !t.pleaseWaitClosed {
t.pleaseWaitClosed = true
ClosePleaseWait(t.app)
}
}))
close(t.stop)
}
//======================================================================
// Local Variables:
// mode: Go
// fill-column: 110
// End: