rivo/tview: how to show an InputField at the current list item's position?

main.go

package main

import (
	"strconv"

	"github.com/gdamore/tcell/v2"
	"github.com/rivo/tview"
)

const pageEditTitle = "editTitle"

func main() {
	app := tview.NewApplication()
	button := tview.NewButton("+ New chat")
	button.SetBorder(true)

	pages := tview.NewPages()
	editTitleInputField := tview.NewInputField().
		SetFieldWidth(40).
		SetAcceptanceFunc(tview.InputFieldMaxLength(40))

	modal := func(p tview.Primitive, currentIndex int) tview.Primitive {
		return tview.NewFlex().SetDirection(tview.FlexRow).
			AddItem(tview.NewFlex().SetDirection(tview.FlexColumn).
				AddItem(tview.NewFlex().SetDirection(tview.FlexRow).
					AddItem(nil, 4+(currentIndex*2), 1, false).
					AddItem(p, 1, 1, true).
					AddItem(nil, 0, 1, false), 0, 1, true).
				AddItem(tview.NewFlex().SetDirection(tview.FlexRow).
					AddItem(nil, 0, 1, false).
					AddItem(nil, 5, 1, false), 0, 3, false), 0, 1, true).
			AddItem(nil, 1, 1, false)
	}

	list := tview.NewList()
	list.SetTitle("History").SetBorder(true)
	for i := 0; i < 50; i++ {
		list.AddItem("item "+strconv.FormatInt(int64(i), 10), "", rune(0), nil)
	}
	list.SetInputCapture(func(event *tcell.EventKey) *tcell.EventKey {
		currentIndex := list.GetCurrentItem()
		currentTitle, _ := list.GetItemText(currentIndex)
		switch event.Rune() {
		case 'j':
			if list.GetCurrentItem() < list.GetItemCount() {
				list.SetCurrentItem(list.GetCurrentItem() + 1)
			}
		case 'k':
			if list.GetCurrentItem() > 0 {
				list.SetCurrentItem(list.GetCurrentItem() - 1)
			}
		case 'e':
			editTitleInputField.SetText(currentTitle)
			pages.AddPage(pageEditTitle, modal(editTitleInputField, currentIndex), true, false)
			pages.ShowPage(pageEditTitle)
		}
		return event
	})

	textView := tview.NewTextView()
	textView.SetTitle("Conversation").SetBorder(true)

	textArea := tview.NewTextArea()
	textArea.SetTitle("Question").SetBorder(true)

	mainFlex := tview.NewFlex().SetDirection(tview.FlexRow).
		AddItem(tview.NewFlex().SetDirection(tview.FlexColumn).
			AddItem(tview.NewFlex().SetDirection(tview.FlexRow).
				AddItem(button, 3, 1, false).
				AddItem(list, 0, 1, false), 0, 1, false).
			AddItem(tview.NewFlex().SetDirection(tview.FlexRow).
				AddItem(textView, 0, 1, false).
				AddItem(textArea, 5, 1, false), 0, 3, false), 0, 1, false)
	pages.
		AddPage("main", mainFlex, true, true).
		AddPage(pageEditTitle, modal(editTitleInputField, list.GetCurrentItem()), true, false)
	if err := app.SetRoot(pages, true).SetFocus(list).Run(); err != nil {
		panic(err)
	}
}