fun inputString()

in src/main/java/com/maddyhome/idea/vim/ui/ex/ExEntryPanelService.kt [39:100]
57 lines of code
14 McCabe index (conditional complexity)

  fun inputString(vimEditor: VimEditor, context: ExecutionContext, prompt: String, finishOn: Char?): String? {
    val editor = vimEditor.ij
    if (vimEditor.inRepeatMode) {
      val input = Extension.consumeString()
      return input ?: error("Not enough strings saved: ${Extension.lastExtensionHandler}")
    }

    if (ApplicationManager.getApplication().isUnitTestMode) {
      val builder = StringBuilder()
      val inputModel = TestInputModel.getInstance(editor)
      var key: KeyStroke? = inputModel.nextKeyStroke()
      while (key != null &&
        !key.isCloseKeyStroke() && key.keyCode != KeyEvent.VK_ENTER &&
        (finishOn == null || key.keyChar != finishOn)
      ) {
        val c = key.keyChar
        if (c != KeyEvent.CHAR_UNDEFINED) {
          builder.append(c)
        }
        key = inputModel.nextKeyStroke()
      }
      if (finishOn != null && key != null && key.keyChar == finishOn) {
        builder.append(key.keyChar)
      }
      Extension.addString(builder.toString())
      return builder.toString()
    } else {
      var text: String? = null
      // XXX: The Ex entry panel is used only for UI here, its logic might be inappropriate for input()
      val commandLine = injector.commandLine.createSearchPrompt(vimEditor, context, prompt.ifEmpty { " " }, "")
      ModalEntry.activate(editor.vim) { key: KeyStroke ->
        return@activate when {
          key.isCloseKeyStroke() -> {
            commandLine.deactivate(refocusOwningEditor = true, resetCaret = true)
            false
          }

          key.keyCode == KeyEvent.VK_ENTER -> {
            text = commandLine.text
            commandLine.deactivate(refocusOwningEditor = true, resetCaret = true)
            false
          }

          finishOn != null && key.keyChar == finishOn -> {
            commandLine.handleKey(key)
            text = commandLine.text
            commandLine.deactivate(refocusOwningEditor = true, resetCaret = true)
            false
          }

          else -> {
            commandLine.handleKey(key)
            true
          }
        }
      }
      if (text != null) {
        Extension.addString(text)
      }
      return text
    }
  }