/usr/lib/python2.7/dist-packages/prompt_toolkit/terminal/vt100_output.py is in python-prompt-toolkit 1.0.9-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 | """
Output for vt100 terminals.
A lot of thanks, regarding outputting of colors, goes to the Pygments project:
(We don't rely on Pygments anymore, because many things are very custom, and
everything has been highly optimized.)
http://pygments.org/
"""
from __future__ import unicode_literals
from prompt_toolkit.filters import to_simple_filter, Condition
from prompt_toolkit.layout.screen import Size
from prompt_toolkit.renderer import Output
from prompt_toolkit.styles import ANSI_COLOR_NAMES
from six.moves import range
import array
import errno
import os
import six
__all__ = (
'Vt100_Output',
)
FG_ANSI_COLORS = {
'ansidefault': 39,
'ansiblack': 30,
'ansidarkgray': 37,
'ansilightgray':90,
'ansiwhite': 97,
# Low intensity.
'ansidarkred': 31,
'ansidarkgreen': 32,
'ansibrown': 33,
'ansidarkblue': 34,
'ansipurple': 35,
'ansiteal': 36,
# High intensity.
'ansired': 91,
'ansigreen': 92,
'ansiyellow': 93,
'ansiblue': 94,
'ansifuchsia': 95,
'ansiturquoise': 96,
}
BG_ANSI_COLORS = {
'ansidefault': 49,
'ansiblack': 40,
'ansidarkgray': 47,
'ansiwhite': 107,
'ansilightgray': 100,
# Low intensity.
'ansidarkred': 41,
'ansidarkgreen': 42,
'ansibrown': 43,
'ansidarkblue': 44,
'ansipurple': 45,
'ansiteal': 46,
# High intensity.
'ansired': 101,
'ansigreen': 102,
'ansiyellow': 103,
'ansiblue': 104,
'ansifuchsia': 105,
'ansiturquoise': 106,
}
ANSI_COLORS_TO_RGB = {
'ansidefault': (0x00, 0x00, 0x00), # Don't use, 'default' doesn't really have a value.
'ansiblack': (0x00, 0x00, 0x00),
'ansidarkgray': (0x7f, 0x7f, 0x7f),
'ansiwhite': (0xff, 0xff, 0xff),
'ansilightgray': (0xe5, 0xe5, 0xe5),
# Low intensity.
'ansidarkred': (0xcd, 0x00, 0x00),
'ansidarkgreen': (0x00, 0xcd, 0x00),
'ansibrown': (0xcd, 0xcd, 0x00),
'ansidarkblue': (0x00, 0x00, 0xcd),
'ansipurple': (0xcd, 0x00, 0xcd),
'ansiteal': (0x00, 0xcd, 0xcd),
# High intensity.
'ansired': (0xff, 0x00, 0x00),
'ansigreen': (0x00, 0xff, 0x00),
'ansiyellow': (0xff, 0xff, 0x00),
'ansiblue': (0x00, 0x00, 0xff),
'ansifuchsia': (0xff, 0x00, 0xff),
'ansiturquoise': (0x00, 0xff, 0xff),
}
assert set(FG_ANSI_COLORS) == set(ANSI_COLOR_NAMES)
assert set(BG_ANSI_COLORS) == set(ANSI_COLOR_NAMES)
assert set(ANSI_COLORS_TO_RGB) == set(ANSI_COLOR_NAMES)
def _get_closest_ansi_color(r, g, b, exclude=()):
"""
Find closest ANSI color. Return it by name.
:param r: Red (Between 0 and 255.)
:param g: Green (Between 0 and 255.)
:param b: Blue (Between 0 and 255.)
:param exclude: A tuple of color names to exclude. (E.g. ``('ansired', )``.)
"""
assert isinstance(exclude, tuple)
# When we have a bit of saturation, avoid the gray-like colors, otherwise,
# too often the distance to the gray color is less.
saturation = abs(r - g) + abs(g - b) + abs(b - r) # Between 0..510
if saturation > 30:
exclude += ('ansilightgray', 'ansidarkgray', 'ansiwhite', 'ansiblack')
# Take the closest color.
# (Thanks to Pygments for this part.)
distance = 257*257*3 # "infinity" (>distance from #000000 to #ffffff)
match = 'ansidefault'
for name, (r2, g2, b2) in ANSI_COLORS_TO_RGB.items():
if name != 'ansidefault' and name not in exclude:
d = (r - r2) ** 2 + (g - g2) ** 2 + (b - b2) ** 2
if d < distance:
match = name
distance = d
return match
class _16ColorCache(dict):
"""
Cache which maps (r, g, b) tuples to 16 ansi colors.
:param bg: Cache for background colors, instead of foreground.
"""
def __init__(self, bg=False):
assert isinstance(bg, bool)
self.bg = bg
def get_code(self, value, exclude=()):
"""
Return a (ansi_code, ansi_name) tuple. (E.g. ``(44, 'ansiblue')``.) for
a given (r,g,b) value.
"""
key = (value, exclude)
if key not in self:
self[key] = self._get(value, exclude)
return self[key]
def _get(self, value, exclude=()):
r, g, b = value
match = _get_closest_ansi_color(r, g, b, exclude=exclude)
# Turn color name into code.
if self.bg:
code = BG_ANSI_COLORS[match]
else:
code = FG_ANSI_COLORS[match]
self[value] = code
return code, match
class _256ColorCache(dict):
"""
Cach which maps (r, g, b) tuples to 256 colors.
"""
def __init__(self):
# Build color table.
colors = []
# colors 0..15: 16 basic colors
colors.append((0x00, 0x00, 0x00)) # 0
colors.append((0xcd, 0x00, 0x00)) # 1
colors.append((0x00, 0xcd, 0x00)) # 2
colors.append((0xcd, 0xcd, 0x00)) # 3
colors.append((0x00, 0x00, 0xee)) # 4
colors.append((0xcd, 0x00, 0xcd)) # 5
colors.append((0x00, 0xcd, 0xcd)) # 6
colors.append((0xe5, 0xe5, 0xe5)) # 7
colors.append((0x7f, 0x7f, 0x7f)) # 8
colors.append((0xff, 0x00, 0x00)) # 9
colors.append((0x00, 0xff, 0x00)) # 10
colors.append((0xff, 0xff, 0x00)) # 11
colors.append((0x5c, 0x5c, 0xff)) # 12
colors.append((0xff, 0x00, 0xff)) # 13
colors.append((0x00, 0xff, 0xff)) # 14
colors.append((0xff, 0xff, 0xff)) # 15
# colors 16..232: the 6x6x6 color cube
valuerange = (0x00, 0x5f, 0x87, 0xaf, 0xd7, 0xff)
for i in range(217):
r = valuerange[(i // 36) % 6]
g = valuerange[(i // 6) % 6]
b = valuerange[i % 6]
colors.append((r, g, b))
# colors 233..253: grayscale
for i in range(1, 22):
v = 8 + i * 10
colors.append((v, v, v))
self.colors = colors
def __missing__(self, value):
r, g, b = value
# Find closest color.
# (Thanks to Pygments for this!)
distance = 257*257*3 # "infinity" (>distance from #000000 to #ffffff)
match = 0
for i, (r2, g2, b2) in enumerate(self.colors):
d = (r - r2) ** 2 + (g - g2) ** 2 + (b - b2) ** 2
if d < distance:
match = i
distance = d
# Turn color name into code.
self[value] = match
return match
_16_fg_colors = _16ColorCache(bg=False)
_16_bg_colors = _16ColorCache(bg=True)
_256_colors = _256ColorCache()
class _EscapeCodeCache(dict):
"""
Cache for VT100 escape codes. It maps
(fgcolor, bgcolor, bold, underline, reverse) tuples to VT100 escape sequences.
:param true_color: When True, use 24bit colors instead of 256 colors.
"""
def __init__(self, true_color=False, ansi_colors_only=False):
assert isinstance(true_color, bool)
self.true_color = true_color
self.ansi_colors_only = to_simple_filter(ansi_colors_only)
def __missing__(self, attrs):
fgcolor, bgcolor, bold, underline, italic, blink, reverse = attrs
parts = []
parts.extend(self._colors_to_code(fgcolor, bgcolor))
if bold:
parts.append('1')
if italic:
parts.append('3')
if blink:
parts.append('5')
if underline:
parts.append('4')
if reverse:
parts.append('7')
if parts:
result = '\x1b[0;' + ';'.join(parts) + 'm'
else:
result = '\x1b[0m'
self[attrs] = result
return result
def _color_name_to_rgb(self, color):
" Turn 'ffffff', into (0xff, 0xff, 0xff). "
try:
rgb = int(color, 16)
except ValueError:
raise
else:
r = (rgb >> 16) & 0xff
g = (rgb >> 8) & 0xff
b = rgb & 0xff
return r, g, b
def _colors_to_code(self, fg_color, bg_color):
" Return a tuple with the vt100 values that represent this color. "
# When requesting ANSI colors only, and both fg/bg color were converted
# to ANSI, ensure that the foreground and background color are not the
# same. (Unless they were explicitely defined to be the same color.)
fg_ansi = [()]
def get(color, bg):
table = BG_ANSI_COLORS if bg else FG_ANSI_COLORS
if color is None:
return ()
# 16 ANSI colors. (Given by name.)
elif color in table:
return (table[color], )
# RGB colors. (Defined as 'ffffff'.)
else:
try:
rgb = self._color_name_to_rgb(color)
except ValueError:
return ()
# When only 16 colors are supported, use that.
if self.ansi_colors_only():
if bg: # Background.
if fg_color != bg_color:
exclude = (fg_ansi[0], )
else:
exclude = ()
code, name = _16_bg_colors.get_code(rgb, exclude=exclude)
return (code, )
else: # Foreground.
code, name = _16_fg_colors.get_code(rgb)
fg_ansi[0] = name
return (code, )
# True colors. (Only when this feature is enabled.)
elif self.true_color:
r, g, b = rgb
return (48 if bg else 38, 2, r, g, b)
# 256 RGB colors.
else:
return (48 if bg else 38, 5, _256_colors[rgb])
result = []
result.extend(get(fg_color, False))
result.extend(get(bg_color, True))
return map(six.text_type, result)
def _get_size(fileno):
# Thanks to fabric (fabfile.org), and
# http://sqizit.bartletts.id.au/2011/02/14/pseudo-terminals-in-python/
"""
Get the size of this pseudo terminal.
:param fileno: stdout.fileno()
:returns: A (rows, cols) tuple.
"""
# Inline imports, because these modules are not available on Windows.
# (This file is used by ConEmuOutput, which is used on Windows.)
import fcntl
import termios
# Buffer for the C call
buf = array.array(b'h' if six.PY2 else u'h', [0, 0, 0, 0])
# Do TIOCGWINSZ (Get)
# Note: We should not pass 'True' as a fourth parameter to 'ioctl'. (True
# is the default.) This causes segmentation faults on some systems.
# See: https://github.com/jonathanslenders/python-prompt-toolkit/pull/364
fcntl.ioctl(fileno, termios.TIOCGWINSZ, buf)
# Return rows, cols
return buf[0], buf[1]
class Vt100_Output(Output):
"""
:param get_size: A callable which returns the `Size` of the output terminal.
:param stdout: Any object with has a `write` and `flush` method + an 'encoding' property.
:param true_color: Use 24bit color instead of 256 colors. (Can be a :class:`SimpleFilter`.)
When `ansi_colors_only` is set, only 16 colors are used.
:param ansi_colors_only: Restrict to 16 ANSI colors only.
:param term: The terminal environment variable. (xterm, xterm-256color, linux, ...)
:param write_binary: Encode the output before writing it. If `True` (the
default), the `stdout` object is supposed to expose an `encoding` attribute.
"""
def __init__(self, stdout, get_size, true_color=False,
ansi_colors_only=None, term=None, write_binary=True):
assert callable(get_size)
assert term is None or isinstance(term, six.text_type)
assert all(hasattr(stdout, a) for a in ('write', 'flush'))
if write_binary:
assert hasattr(stdout, 'encoding')
self._buffer = []
self.stdout = stdout
self.write_binary = write_binary
self.get_size = get_size
self.true_color = to_simple_filter(true_color)
self.term = term or 'xterm'
# ANSI colors only?
if ansi_colors_only is None:
# When not given, use the following default.
ANSI_COLORS_ONLY = bool(os.environ.get(
'PROMPT_TOOLKIT_ANSI_COLORS_ONLY', False))
@Condition
def ansi_colors_only():
return ANSI_COLORS_ONLY or term in ('linux', 'eterm-color')
else:
ansi_colors_only = to_simple_filter(ansi_colors_only)
self.ansi_colors_only = ansi_colors_only
# Cache for escape codes.
self._escape_code_cache = _EscapeCodeCache(ansi_colors_only=ansi_colors_only)
self._escape_code_cache_true_color = _EscapeCodeCache(
true_color=True, ansi_colors_only=ansi_colors_only)
@classmethod
def from_pty(cls, stdout, true_color=False, ansi_colors_only=None, term=None):
"""
Create an Output class from a pseudo terminal.
(This will take the dimensions by reading the pseudo
terminal attributes.)
"""
assert stdout.isatty()
def get_size():
rows, columns = _get_size(stdout.fileno())
return Size(rows=rows, columns=columns)
return cls(stdout, get_size, true_color=true_color,
ansi_colors_only=ansi_colors_only, term=term)
def fileno(self):
" Return file descriptor. "
return self.stdout.fileno()
def encoding(self):
" Return encoding used for stdout. "
return self.stdout.encoding
def write_raw(self, data):
"""
Write raw data to output.
"""
self._buffer.append(data)
def write(self, data):
"""
Write text to output.
(Removes vt100 escape codes. -- used for safely writing text.)
"""
self._buffer.append(data.replace('\x1b', '?'))
def set_title(self, title):
"""
Set terminal title.
"""
if self.term not in ('linux', 'eterm-color'): # Not supported by the Linux console.
self.write_raw('\x1b]2;%s\x07' % title.replace('\x1b', '').replace('\x07', ''))
def clear_title(self):
self.set_title('')
def erase_screen(self):
"""
Erases the screen with the background colour and moves the cursor to
home.
"""
self.write_raw('\x1b[2J')
def enter_alternate_screen(self):
self.write_raw('\x1b[?1049h\x1b[H')
def quit_alternate_screen(self):
self.write_raw('\x1b[?1049l')
def enable_mouse_support(self):
self.write_raw('\x1b[?1000h')
# Enable urxvt Mouse mode. (For terminals that understand this.)
self.write_raw('\x1b[?1015h')
# Also enable Xterm SGR mouse mode. (For terminals that understand this.)
self.write_raw('\x1b[?1006h')
# Note: E.g. lxterminal understands 1000h, but not the urxvt or sgr
# extensions.
def disable_mouse_support(self):
self.write_raw('\x1b[?1000l')
self.write_raw('\x1b[?1015l')
self.write_raw('\x1b[?1006l')
def erase_end_of_line(self):
"""
Erases from the current cursor position to the end of the current line.
"""
self.write_raw('\x1b[K')
def erase_down(self):
"""
Erases the screen from the current line down to the bottom of the
screen.
"""
self.write_raw('\x1b[J')
def reset_attributes(self):
self.write_raw('\x1b[0m')
def set_attributes(self, attrs):
"""
Create new style and output.
:param attrs: `Attrs` instance.
"""
if self.true_color() and not self.ansi_colors_only():
self.write_raw(self._escape_code_cache_true_color[attrs])
else:
self.write_raw(self._escape_code_cache[attrs])
def disable_autowrap(self):
self.write_raw('\x1b[?7l')
def enable_autowrap(self):
self.write_raw('\x1b[?7h')
def enable_bracketed_paste(self):
self.write_raw('\x1b[?2004h')
def disable_bracketed_paste(self):
self.write_raw('\x1b[?2004l')
def cursor_goto(self, row=0, column=0):
""" Move cursor position. """
self.write_raw('\x1b[%i;%iH' % (row, column))
def cursor_up(self, amount):
if amount == 0:
pass
elif amount == 1:
self.write_raw('\x1b[A')
else:
self.write_raw('\x1b[%iA' % amount)
def cursor_down(self, amount):
if amount == 0:
pass
elif amount == 1:
# Note: Not the same as '\n', '\n' can cause the window content to
# scroll.
self.write_raw('\x1b[B')
else:
self.write_raw('\x1b[%iB' % amount)
def cursor_forward(self, amount):
if amount == 0:
pass
elif amount == 1:
self.write_raw('\x1b[C')
else:
self.write_raw('\x1b[%iC' % amount)
def cursor_backward(self, amount):
if amount == 0:
pass
elif amount == 1:
self.write_raw('\b') # '\x1b[D'
else:
self.write_raw('\x1b[%iD' % amount)
def hide_cursor(self):
self.write_raw('\x1b[?25l')
def show_cursor(self):
self.write_raw('\x1b[?12l\x1b[?25h') # Stop blinking cursor and show.
def flush(self):
"""
Write to output stream and flush.
"""
if not self._buffer:
return
data = ''.join(self._buffer)
try:
# (We try to encode ourself, because that way we can replace
# characters that don't exist in the character set, avoiding
# UnicodeEncodeError crashes. E.g. u'\xb7' does not appear in 'ascii'.)
# My Arch Linux installation of july 2015 reported 'ANSI_X3.4-1968'
# for sys.stdout.encoding in xterm.
if self.write_binary:
if hasattr(self.stdout, 'buffer'):
out = self.stdout.buffer # Py3.
else:
out = self.stdout
out.write(data.encode(self.stdout.encoding or 'utf-8', 'replace'))
else:
self.stdout.write(data)
self.stdout.flush()
except IOError as e:
if e.args and e.args[0] == errno.EINTR:
# Interrupted system call. Can happpen in case of a window
# resize signal. (Just ignore. The resize handler will render
# again anyway.)
pass
elif e.args and e.args[0] == 0:
# This can happen when there is a lot of output and the user
# sends a KeyboardInterrupt by pressing Control-C. E.g. in
# a Python REPL when we execute "while True: print('test')".
# (The `ptpython` REPL uses this `Output` class instead of
# `stdout` directly -- in order to be network transparent.)
# So, just ignore.
pass
else:
raise
self._buffer = []
def ask_for_cpr(self):
"""
Asks for a cursor position report (CPR).
"""
self.write_raw('\x1b[6n')
self.flush()
def bell(self):
" Sound bell. "
self.write_raw('\a')
self.flush()
|