func buildCommandArea()

in plc4go/tools/plc4xbrowser/ui/ui.go [113:210]
92 lines of code
13 McCabe index (conditional complexity)

func buildCommandArea(newPrimitive func(text string) tview.Primitive, application *tview.Application) tview.Primitive {
	commandAreaHeader := newPrimitive("Commands")
	commandArea := tview.NewGrid().
		SetRows(3, 0, 3).
		SetColumns(0).
		AddItem(commandAreaHeader, 0, 0, 1, 1, 0, 0, false)
	{
		enteredCommandsView := tview.NewTextView().
			SetDynamicColors(true).
			SetRegions(true).
			SetWordWrap(true).
			SetChangedFunc(func() {
				application.Draw()
			})
		commandOutput = enteredCommandsView
		commandOutputClear = func() {
			enteredCommandsView.SetText("")
		}

		commandArea.AddItem(enteredCommandsView, 1, 0, 1, 1, 0, 0, false)

		commandInputField := tview.NewInputField().
			SetLabel("$").
			SetFieldWidth(30)
		application.SetInputCapture(func(event *tcell.EventKey) *tcell.EventKey {
			switch event.Key() {
			case tcell.KeyCtrlC:
				commandInputField.SetText("")
				application.SetFocus(commandInputField)
				return nil
			case tcell.KeyCtrlD:
				// TODO: maybe add a modal here
				application.Stop()
				return nil
			}
			return event
		})
		commandInputField.
			SetDoneFunc(func(key tcell.Key) {
				commandText := commandInputField.GetText()
				if commandText == "quit" {
					// TODO: maybe add a modal here
					application.Stop()
					return
				}
				commandsExecuted++
				go func() {
					commandHistoryShortcut, _ := regexp.Compile("^[0-9]$")
					if commandHistoryShortcut.MatchString(commandText) {
						atoi, _ := strconv.Atoi(commandHistoryShortcut.FindString(commandText))
						if atoi < len(config.History.Last10Commands) {
							commandText = config.History.Last10Commands[atoi]
						} else {
							_, _ = fmt.Fprintf(enteredCommandsView, "[#ff0000]%s %s[white]\n", time.Now().Format("04:05"), errors.Errorf("No such elements %d in command history", atoi))
							return
						}
					}
					_, _ = fmt.Fprintf(enteredCommandsView, "%s [\"%d\"]%s[\"\"]\n", time.Now().Format("04:05"), commandsExecuted, commandText)
					if err := Execute(commandText); err != nil {
						_, _ = fmt.Fprintf(enteredCommandsView, "[#ff0000]%s %s[white]\n", time.Now().Format("04:05"), err)
						return
					}
					application.QueueUpdateDraw(func() {
						commandInputField.SetText("")
					})
				}()
			})
		commandInputField.SetAutocompleteFunc(rootCommand.Completions)

		enteredCommandsView.SetDoneFunc(func(key tcell.Key) {
			currentSelection := enteredCommandsView.GetHighlights()
			if key == tcell.KeyEnter {
				if len(currentSelection) > 0 {
					enteredCommandsView.Highlight()
				} else {
					enteredCommandsView.Highlight("0").ScrollToHighlight()
				}
				if len(currentSelection) == 1 {
					commandInputField.SetText(enteredCommandsView.GetRegionText(currentSelection[0]))
					application.SetFocus(commandInputField)
				}
			} else if len(currentSelection) > 0 {
				index, _ := strconv.Atoi(currentSelection[0])
				if key == tcell.KeyTab {
					index = (index + 1) % commandsExecuted
				} else if key == tcell.KeyBacktab {
					index = (index - 1 + commandsExecuted) % commandsExecuted
				} else {
					return
				}
				enteredCommandsView.Highlight(strconv.Itoa(index)).ScrollToHighlight()
			}
		})

		commandArea.AddItem(commandInputField, 2, 0, 1, 1, 0, 0, true)
	}
	return commandArea
}