TextArea get panic when undo(<C-z>) after SetText #844
Description
package main
import (
"github.com/gdamore/tcell/v2"
"github.com/rivo/tview"
)
var (
app = tview.NewApplication()
textArea = tview.NewTextArea()
)
func main() {
textArea.SetInputCapture(func(event *tcell.EventKey) *tcell.EventKey {
key := event.Key()
switch key {
case tcell.KeyCtrlQ:
textArea.SetText("", true)
}
return event
})
if err := app.SetRoot(textArea,
true).EnableMouse(true).Run(); err != nil {
panic(err)
}
}To reproduce
- Type something in textArea
- Press
<C-q>. In above example code, it'll clear text of textArea. - Press
<C-z>to undo
Then get the panic
panic: runtime error: index out of range [1] with length 0 [recovered]
panic: runtime error: index out of range [1] with length 0
goroutine 1 [running]:
github.com/rivo/tview.(*Application).Run.func1()
/home/xun/go/pkg/mod/github.com/rivo/tview@v0.0.0-20230406072732-e22ce9588bb4/application.go:251 +0x4d
panic({0x548f20, 0xc00048e018})
/usr/lib/go/src/runtime/panic.go:884 +0x213
github.com/rivo/tview.(*TextArea).InputHandler.func1(0xc000486220, 0x10?)
/home/xun/go/pkg/mod/github.com/rivo/tview@v0.0.0-20230406072732-e22ce9588bb4/textarea.go:2189 +0x3258
github.com/rivo/tview.(*Box).WrapInputHandler.func1(0xc000152000?, 0xc000147e58?)
/home/xun/go/pkg/mod/github.com/rivo/tview@v0.0.0-20230406072732-e22ce9588bb4/box.go:167 +0x53
github.com/rivo/tview.(*Application).Run(0xc00014c000)
/home/xun/go/pkg/mod/github.com/rivo/tview@v0.0.0-20230406072732-e22ce9588bb4/application.go:344 +0x57d
main.main()
/home/xun/waste/gotest/tui/main.go:24 +0x7e