action_chains.py 文件源码

def key_down(self, value, element=None):
        """
        Sends a key press only, without releasing it.
           Should only be used with modifier keys (Control, Alt and Shift).

        :Args:
         - value: The modifier key to send. Values are defined in `Keys` class.
         - element: The element to send keys.
           If None, sends a key to current focused element.

        Example, pressing ctrl+c::

            ActionsChains(driver).key_down(Keys.CONTROL).send_keys('c').key_up(Keys.CONTROL).perform()

        """
        if element: self.click(element)
        self._actions.append(lambda:
            self._driver.execute(Command.SEND_KEYS_TO_ACTIVE_ELEMENT, {
                "value": self._keys_to_typing(value) }))
        return self