github.com/muhammedhassanm/blockchain@v0.0.0-20200120143007-697261defd4d/sawtooth-core-master/cli/sawtooth_cli/tty.py (about)

     1  # Copyright 2017 Intel Corporation
     2  #
     3  # Licensed under the Apache License, Version 2.0 (the 'License');
     4  # you may not use this file except in compliance with the License.
     5  # You may obtain a copy of the License at
     6  #
     7  #     http://www.apache.org/licenses/LICENSE-2.0
     8  #
     9  # Unless required by applicable law or agreed to in writing, software
    10  # distributed under the License is distributed on an "AS IS" BASIS,
    11  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  # See the License for the specific language governing permissions and
    13  # limitations under the License.
    14  # ------------------------------------------------------------------------------
    15  
    16  import sys
    17  import os
    18  
    19  
    20  DEFAULT_HEIGHT = 45
    21  DEFAULT_WIDTH = 158
    22  
    23  
    24  def size():
    25      """Determines the height and width of the console window
    26  
    27          Returns:
    28              tuple of int: The height in lines, then width in characters
    29      """
    30      try:
    31          assert os != 'nt' and sys.stdout.isatty()
    32          rows, columns = os.popen('stty size', 'r').read().split()
    33      except (AssertionError, AttributeError, ValueError):
    34          # in case of failure, use dimensions of a full screen 13" laptop
    35          rows, columns = DEFAULT_HEIGHT, DEFAULT_WIDTH
    36  
    37      return int(rows), int(columns)
    38  
    39  
    40  def height():
    41      """Determines the height of console window in lines
    42  
    43          Returns:
    44              int: The height in lines
    45      """
    46      console_height, _ = size()
    47      return console_height
    48  
    49  
    50  def width():
    51      """Determines the width of console window in characters
    52  
    53          Returns:
    54              int: The width in characters
    55      """
    56      _, console_width = size()
    57      return console_width