text: # GUI Application automation and testing library
  # Copyright (C) 2006-2018 Mark Mc Mahon and Contributors
  # https://github.com/pywinauto/pywinauto/graphs/contributors
  # http://pywinauto.readthedocs.io/en/latest/credits.html
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  """Implementation of the class to deal with an UI element (based on UI Automation API)"""
  
  from comtypes import COMError
  from six import integer_types, text_type
  
  from .uia_defines import IUIA
  from .uia_defines import get_elem_interface
  
  from .handleprops import dumpwindow, controlid
  from .element_info import ElementInfo
  from .win32structures import RECT
  from .actionlogger import ActionLogger
  
  
  def elements_from_uia_array(ptrs, cache_enable=False):
      """Build a list of UIAElementInfo elements from IUIAutomationElementArray"""
      elements = []
      for n in range(ptrs.Length):
          try:
              elements.append(UIAElementInfo(ptrs.GetElement(n), cache_enable))
          except COMError:
              continue
      return elements
  
  
  class UIAElementInfo(ElementInfo):
      """UI element wrapper for IUIAutomation API"""
  
      def __init__(self, handle_or_elem=None, cache_enable=False):
          """
          Create an instance of UIAElementInfo from a handle (int or long)
          or from an IUIAutomationElement.
  
          If handle_or_elem is None create an instance for UI root element.
          """
          if handle_or_elem is not None:
              if isinstance(handle_or_elem, integer_types):
                  # Create instane of UIAElementInfo from a handle
                  self._element = IUIA().iuia.ElementFromHandle(handle_or_elem)
              elif isinstance(handle_or_elem, IUIA().ui_automation_client.IUIAutomationElement):
                  self._element = handle_or_elem
              else:
                  raise TypeError("UIAElementInfo object can be initialized " + \
                                  "with integer or IUIAutomationElement instance only!")
          else:
              self._element = IUIA().root
  
          self.set_cache_strategy(cached=cache_enable)
  
      def _get_current_class_name(self):
          """Return an actual class name of the element"""
          try:
              cn = self._element.CurrentClassName
              return text_type('') if cn is None else cn
          except COMError:
              return text_type('')  # probably element already doesn't exist
  
      def _get_cached_class_name(self):
          """Return a cached class name of the element"""
          if self._cached_class_name is None:
              self._cached_class_name = self._get_current_class_name()
          return self._cached_class_name
  
      def _get_current_handle(self):
          """Return an actual handle of the element"""
          try:
              return self._element.CurrentNativeWindowHandle
          except COMError:
              return None  # probably element already doesn't exist
  
      def _get_cached_handle(self):
          """Return a cached handle of the element"""
          if self._cached_handle is None:
              self._cached_handle = self._get_current_handle()
          return self._cached_handle
  
      def _get_current_control_type(self):
          """Return an actual control type of the element"""
          try:
              return IUIA().known_control_type_ids[self._element.CurrentControlType]
          except COMError:
              return None  # probably element already doesn't exist
  
      def _get_cached_control_type(self):
          """Return a cached control type of the element"""
          if self._cached_control_type is None:
              self._cached_control_type = self._get_current_control_type()
          return self._cached_control_type
  
      def _get_current_name(self):
          """Return an actual name of the element"""
          try:
              n = self._element.CurrentName
              return text_type('') if n is None else n
          except COMError:
              return text_type('')  # probably element already doesn't exist
  
      def _get_cached_name(self):
          """Return a cached name of the element"""
          if self._cached_name is None:
              self._cached_name = self._get_current_name()
          return self._cached_name
  
      def _get_current_visible(self):
          """Return an actual visible property of the element"""
          try:
              return bool(not self._element.CurrentIsOffscreen)
          except COMError:
              return False  # probably element already doesn't exist
  
      def _get_cached_visible(self):
          """Return a cached visible property of the element"""
          if self._cached_visible is None:
              self._cached_visible = self._get_current_visible()
          return self._cached_visible
  
      def _get_current_rich_text(self):
          """Return the actual rich_text of the element"""
          if not self.class_name:
              return self.name
          try:
              pattern = get_elem_interface(self._element, "Text")
              return pattern.DocumentRange.GetText(-1)
          except Exception:
              return self.name  # TODO: probably we should raise an exception here
  
      def _get_cached_rich_text(self):
          """Return the cached rich_text of the element"""
          if self._cached_rich_text is None:
              self._cached_rich_text = self._get_current_rich_text()
          return self._cached_rich_text
  
      def set_cache_strategy(self, cached=None):
          """Setup a cache strategy for frequently used attributes"""
          if cached is True:
              # Refresh cached attributes
              self._cached_class_name = None
              self._cached_handle = None
              self._cached_control_type = None
              self._cached_name = None
              self._cached_visible = None
              self._cached_rich_text = None
  
              # Switch to cached attributes
              self._get_class_name = self._get_cached_class_name
              self._get_handle = self._get_cached_handle
              self._get_control_type = self._get_cached_control_type
              self._get_name = self._get_cached_name
              self._get_visible = self._get_cached_visible
              self._get_rich_text = self._get_cached_rich_text
          else:
              # Switch to actual (non-cached) attributes
              self._get_class_name = self._get_current_class_name
              self._get_handle = self._get_current_handle
              self._get_control_type = self._get_current_control_type
              self._get_name = self._get_current_name
              self._get_visible = self._get_current_visible
              self._get_rich_text = self._get_current_rich_text
  
      @property
      def element(self):
          """Return AutomationElement's instance"""
          return self._element
  
      @property
      def automation_id(self):
          """Return AutomationId of the element"""
          try:
              return self._element.CurrentAutomationId
          except COMError:
              return None  # probably element already doesn't exist
  
      @property
      def control_id(self):
          """Return ControlId of the element if it has a handle"""
          if (self.handle):
              return controlid(self.handle)
          else:
              return None
  
      @property
      def process_id(self):
          """Return ProcessId of the element"""
          try:
              return self._element.CurrentProcessId
          except COMError:
              return None  # probably element already doesn't exist
  
      @property
      def framework_id(self):
          """Return FrameworkId of the element"""
          try:
              return self._element.CurrentFrameworkId
          except COMError:
              return None  # probably element already doesn't exist
  
      @property
      def runtime_id(self):
          """Return Runtime ID (hashable value but may be different from run to run)"""
          return self._element.GetRuntimeId()
  
      @property
      def name(self):
          """Return name of the element"""
          return self._get_name()
  
      @property
      def class_name(self):
          """Return class name of the element"""
          return self._get_class_name()
  
      @property
      def control_type(self):
          """Return control type of element"""
          return self._get_control_type()
  
      @property
      def handle(self):
          """Return handle of the element"""
          return self._get_handle()
  
      @property
      def parent(self):
          """Return parent of the element"""
          parent_elem = IUIA().iuia.ControlViewWalker.GetParentElement(self._element)
          if parent_elem:
              return UIAElementInfo(parent_elem)
          else:
              return None
  
      def _get_elements(self, tree_scope, cond=IUIA().true_condition, cache_enable=False):
          """Find all elements according to the given tree scope and conditions"""
          try:
              ptrs_array = self._element.FindAll(tree_scope, cond)
              return elements_from_uia_array(ptrs_array, cache_enable)
          except(COMError, ValueError):
              ActionLogger().log("COM error: can't get elements")
              return []
  
      def children(self, **kwargs):
          """Return a list of only immediate children of the element
  
           * **kwargs** is a criteria to reduce a list by process,
             class_name, control_type, content_only and/or title.
          """
          cache_enable = kwargs.pop('cache_enable', False)
          cond = IUIA().build_condition(**kwargs)
          return self._get_elements(IUIA().tree_scope["children"], cond, cache_enable)
  
      def iter_children(self, **kwargs):
          """Return a generator of only immediate children of the element
  
           * **kwargs** is a criteria to reduce a list by process,
             class_name, control_type, content_only and/or title.
          """
          cond = IUIA().build_condition(**kwargs)
          tree_walker = IUIA().iuia.CreateTreeWalker(cond)
          element = tree_walker.GetFirstChildElement(self._element)
          while element:
              yield UIAElementInfo(element)
              element = tree_walker.GetNextSiblingElement(element)
  
      def descendants(self, **kwargs):
          """Return a list of all descendant children of the element
  
           * **kwargs** is a criteria to reduce a list by process,
             class_name, control_type, content_only and/or title.
          """
          cache_enable = kwargs.pop('cache_enable', False)
          depth = kwargs.pop('depth', None)
          cond = IUIA().build_condition(**kwargs)
          elements = self._get_elements(IUIA().tree_scope["descendants"], cond, cache_enable)
  
          elements = ElementInfo.filter_with_depth(elements, self, depth)
  
          return elements
  
      @property
      def visible(self):
          """Check if the element is visible"""
          return self._get_visible()
  
      @property
      def enabled(self):
          """Check if the element is enabled"""
          return bool(self._element.CurrentIsEnabled)
  
      @property
      def rectangle(self):
          """Return rectangle of the element"""
          bound_rect = self._element.CurrentBoundingRectangle
          rect = RECT()
          rect.left = bound_rect.left
          rect.top = bound_rect.top
          rect.right = bound_rect.right
          rect.bottom = bound_rect.bottom
          return rect
  
      def dump_window(self):
          """Dump window to a set of properties"""
          return dumpwindow(self.handle)
  
      @property
      def rich_text(self):
          """Return rich_text of the element"""
          return self._get_rich_text()
  
      def __eq__(self, other):
          """Check if 2 UIAElementInfo objects describe 1 actual element"""
          if not isinstance(other, UIAElementInfo):
              return False
          return bool(IUIA().iuia.CompareElements(self.element, other.element))
  