class_docstr: Typical usage:
  
  ::
  
      output = Vt100_Output.from_pty(sys.stdout)
      r = Renderer(style, output)
      r.render(cli, layout=...)
class_docstr_tok: ["Typical","usage",":",":",":","output","=","Vt100_Output.from_pty","(","sys.stdout",")","r","=","Renderer","(","style",",","output",")","r.render","(","cli",",","layout=","...",")"]
docstr: True when the height from the cursor until the bottom of the terminal
  is known. (It's often nicer to draw bottom toolbars only if the height
  is known, in order to avoid flickering when the CPR response arrives.)
docstr_tok: ["True","when","the","height","from","the","cursor","until","the","bottom","of","the","terminal","is","known",".","(","It","'s","often","nicer","to","draw","bottom","toolbars","only","if","the","height","is","known",",","in","order","to","avoid","flickering","when","the","CPR","response","arrives",".",")"]
code: def height_is_known(self):
      """
      True when the height from the cursor until the bottom of the terminal
      is known. (It's often nicer to draw bottom toolbars only if the height
      is known, in order to avoid flickering when the CPR response arrives.)
      """
      return (
          self.use_alternate_screen
          or self._min_available_height > 0
          or is_windows()
      )
  
imports: from __future__ import unicode_literals
  from prompt_toolkit.filters import to_cli_filter
  from prompt_toolkit.layout.mouse_handlers import MouseHandlers
  from prompt_toolkit.layout.screen import Point, Screen, WritePosition
  from prompt_toolkit.output import Output
  from prompt_toolkit.styles import Style
  from prompt_toolkit.token import Token
  from prompt_toolkit.utils import is_windows
  from six.moves import range
label_desc: Use image node_id 3 for calling the Renderer obj's underlying member method code with example usage: obj.height_is_known() and returns: unknown