|
1
|
|
|
import os |
|
2
|
|
|
import platform |
|
3
|
|
|
import shlex |
|
4
|
|
|
import struct |
|
5
|
|
|
import subprocess |
|
6
|
|
|
from typing import Optional, Tuple |
|
7
|
|
|
|
|
8
|
|
|
|
|
9
|
|
|
class Terminal(object): |
|
10
|
|
|
""" |
|
11
|
|
|
Represents the current terminal. |
|
12
|
|
|
""" |
|
13
|
|
|
|
|
14
|
|
|
# ------------------------------------------------------------------------------------------------------------------ |
|
15
|
|
|
def __init__(self): |
|
16
|
|
|
""" |
|
17
|
|
|
Object constructor. |
|
18
|
|
|
""" |
|
19
|
|
|
self._width = None |
|
20
|
|
|
self._height = None |
|
21
|
|
|
|
|
22
|
|
|
# ------------------------------------------------------------------------------------------------------------------ |
|
23
|
|
|
@property |
|
24
|
|
|
def width(self) -> Optional[int]: |
|
25
|
|
|
""" |
|
26
|
|
|
Returns the width of the terminal. |
|
27
|
|
|
""" |
|
28
|
|
|
width = os.getenv('COLUMNS', '').strip() |
|
29
|
|
|
if width: |
|
30
|
|
|
return int(width) |
|
31
|
|
|
|
|
32
|
|
|
if self._width is None: |
|
33
|
|
|
self._init_dimensions() |
|
34
|
|
|
|
|
35
|
|
|
return self._width |
|
36
|
|
|
|
|
37
|
|
|
# ------------------------------------------------------------------------------------------------------------------ |
|
38
|
|
|
@property |
|
39
|
|
|
def height(self) -> Optional[int]: |
|
40
|
|
|
""" |
|
41
|
|
|
Returns the height of the terminal. |
|
42
|
|
|
""" |
|
43
|
|
|
height = os.getenv('LINES', '').strip() |
|
44
|
|
|
if height: |
|
45
|
|
|
return int(height) |
|
46
|
|
|
|
|
47
|
|
|
if self._height is None: |
|
48
|
|
|
self._init_dimensions() |
|
49
|
|
|
|
|
50
|
|
|
return self._height |
|
51
|
|
|
|
|
52
|
|
|
# ------------------------------------------------------------------------------------------------------------------ |
|
53
|
|
|
def _init_dimensions(self) -> None: |
|
54
|
|
|
""" |
|
55
|
|
|
Initializes the terminal dimensions. |
|
56
|
|
|
""" |
|
57
|
|
|
current_os = platform.system().lower() |
|
58
|
|
|
dimensions = None |
|
59
|
|
|
|
|
60
|
|
|
if current_os.lower() == 'windows': |
|
61
|
|
|
dimensions = self._get_terminal_size_windows() |
|
62
|
|
|
if dimensions is None: |
|
63
|
|
|
dimensions = self._get_terminal_size_tput() |
|
64
|
|
|
elif current_os.lower() in ['linux', 'darwin'] or current_os.startswith('cygwin'): |
|
65
|
|
|
dimensions = self._get_terminal_size_linux() |
|
66
|
|
|
|
|
67
|
|
|
if dimensions is None: |
|
68
|
|
|
dimensions = 80, 25 |
|
69
|
|
|
|
|
70
|
|
|
self._width, self._height = dimensions |
|
71
|
|
|
|
|
72
|
|
|
# ------------------------------------------------------------------------------------------------------------------ |
|
73
|
|
|
@staticmethod |
|
74
|
|
|
def _get_terminal_size_windows() -> Optional[Tuple[int, int]]: |
|
75
|
|
|
""" |
|
76
|
|
|
Returns the width and height of the terminal on MS-Windows |
|
77
|
|
|
""" |
|
78
|
|
|
try: |
|
79
|
|
|
from ctypes import windll, create_string_buffer |
|
80
|
|
|
# stdin handle is -10 |
|
81
|
|
|
# stdout handle is -11 |
|
82
|
|
|
# stderr handle is -12 |
|
83
|
|
|
h = windll.kernel32.GetStdHandle(-12) |
|
84
|
|
|
csbi = create_string_buffer(22) |
|
85
|
|
|
res = windll.kernel32.GetConsoleScreenBufferInfo(h, csbi) |
|
86
|
|
|
if res: |
|
87
|
|
|
(bufx, bufy, curx, cury, wattr, left, top, right, bottom, maxx, maxy) = struct.unpack("hhhhHhhhhhh", |
|
88
|
|
|
csbi.raw) |
|
89
|
|
|
sizex = right - left + 1 |
|
90
|
|
|
sizey = bottom - top + 1 |
|
91
|
|
|
return sizex, sizey |
|
92
|
|
|
except: |
|
93
|
|
|
return None |
|
94
|
|
|
|
|
95
|
|
|
# ------------------------------------------------------------------------------------------------------------------ |
|
96
|
|
|
@staticmethod |
|
97
|
|
|
def _get_terminal_size_tput() -> Optional[Tuple[int, int]]: |
|
98
|
|
|
""" |
|
99
|
|
|
Returns the width and height of the terminal on MS-Windows |
|
100
|
|
|
|
|
101
|
|
|
See: https://stackoverflow.com/questions/263890/how-do-i-find-the-width-height-of-a-terminal-window |
|
102
|
|
|
""" |
|
103
|
|
|
try: |
|
104
|
|
|
cols = int(subprocess.check_output(shlex.split('tput cols'), stderr=subprocess.STDOUT)) |
|
105
|
|
|
rows = int(subprocess.check_output(shlex.split('tput lines'), stderr=subprocess.STDOUT)) |
|
106
|
|
|
|
|
107
|
|
|
return cols, rows |
|
108
|
|
|
except: |
|
109
|
|
|
return None |
|
110
|
|
|
|
|
111
|
|
|
# ------------------------------------------------------------------------------------------------------------------ |
|
112
|
|
|
def _get_terminal_size_linux(self) -> Optional[Tuple[int, int]]: |
|
113
|
|
|
""" |
|
114
|
|
|
Returns the width and height of the terminal on Linux. |
|
115
|
|
|
""" |
|
116
|
|
|
|
|
117
|
|
|
def ioctl_GWINSZ(fd): |
|
118
|
|
|
try: |
|
119
|
|
|
import fcntl |
|
120
|
|
|
import termios |
|
121
|
|
|
cr = struct.unpack('hh', fcntl.ioctl(fd, termios.TIOCGWINSZ, '1234')) |
|
122
|
|
|
return cr |
|
123
|
|
|
except: |
|
124
|
|
|
pass |
|
125
|
|
|
|
|
126
|
|
|
cr = ioctl_GWINSZ(0) or ioctl_GWINSZ(1) or ioctl_GWINSZ(2) |
|
127
|
|
|
if not cr: |
|
128
|
|
|
try: |
|
129
|
|
|
fd = os.open(os.ctermid(), os.O_RDONLY) |
|
130
|
|
|
cr = ioctl_GWINSZ(fd) |
|
131
|
|
|
os.close(fd) |
|
132
|
|
|
except: |
|
133
|
|
|
pass |
|
134
|
|
|
|
|
135
|
|
|
if not cr: |
|
136
|
|
|
try: |
|
137
|
|
|
cr = (os.environ['LINES'], os.environ['COLUMNS']) |
|
138
|
|
|
except: |
|
139
|
|
|
return None |
|
140
|
|
|
|
|
141
|
|
|
return int(cr[1]), int(cr[0]) |
|
142
|
|
|
|
|
143
|
|
|
# ---------------------------------------------------------------------------------------------------------------------- |
|
144
|
|
|
|
DatabaseStratum /
py-stratum-backend
