/usr/share/pyshared/pexpect/ANSI.py is in python-pexpect 3.2-1.
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 | '''This implements an ANSI (VT100) terminal emulator as a subclass of screen.
PEXPECT LICENSE
This license is approved by the OSI and FSF as GPL-compatible.
http://opensource.org/licenses/isc-license.txt
Copyright (c) 2012, Noah Spurrier <noah@noah.org>
PERMISSION TO USE, COPY, MODIFY, AND/OR DISTRIBUTE THIS SOFTWARE FOR ANY
PURPOSE WITH OR WITHOUT FEE IS HEREBY GRANTED, PROVIDED THAT THE ABOVE
COPYRIGHT NOTICE AND THIS PERMISSION NOTICE APPEAR IN ALL COPIES.
THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
'''
# references:
# http://en.wikipedia.org/wiki/ANSI_escape_code
# http://www.retards.org/terminals/vt102.html
# http://vt100.net/docs/vt102-ug/contents.html
# http://vt100.net/docs/vt220-rm/
# http://www.termsys.demon.co.uk/vtansi.htm
from . import screen
from . import FSM
import string
#
# The 'Do.*' functions are helper functions for the ANSI class.
#
def DoEmit (fsm):
screen = fsm.memory[0]
screen.write_ch(fsm.input_symbol)
def DoStartNumber (fsm):
fsm.memory.append (fsm.input_symbol)
def DoBuildNumber (fsm):
ns = fsm.memory.pop()
ns = ns + fsm.input_symbol
fsm.memory.append (ns)
def DoBackOne (fsm):
screen = fsm.memory[0]
screen.cursor_back ()
def DoBack (fsm):
count = int(fsm.memory.pop())
screen = fsm.memory[0]
screen.cursor_back (count)
def DoDownOne (fsm):
screen = fsm.memory[0]
screen.cursor_down ()
def DoDown (fsm):
count = int(fsm.memory.pop())
screen = fsm.memory[0]
screen.cursor_down (count)
def DoForwardOne (fsm):
screen = fsm.memory[0]
screen.cursor_forward ()
def DoForward (fsm):
count = int(fsm.memory.pop())
screen = fsm.memory[0]
screen.cursor_forward (count)
def DoUpReverse (fsm):
screen = fsm.memory[0]
screen.cursor_up_reverse()
def DoUpOne (fsm):
screen = fsm.memory[0]
screen.cursor_up ()
def DoUp (fsm):
count = int(fsm.memory.pop())
screen = fsm.memory[0]
screen.cursor_up (count)
def DoHome (fsm):
c = int(fsm.memory.pop())
r = int(fsm.memory.pop())
screen = fsm.memory[0]
screen.cursor_home (r,c)
def DoHomeOrigin (fsm):
c = 1
r = 1
screen = fsm.memory[0]
screen.cursor_home (r,c)
def DoEraseDown (fsm):
screen = fsm.memory[0]
screen.erase_down()
def DoErase (fsm):
arg = int(fsm.memory.pop())
screen = fsm.memory[0]
if arg == 0:
screen.erase_down()
elif arg == 1:
screen.erase_up()
elif arg == 2:
screen.erase_screen()
def DoEraseEndOfLine (fsm):
screen = fsm.memory[0]
screen.erase_end_of_line()
def DoEraseLine (fsm):
arg = int(fsm.memory.pop())
screen = fsm.memory[0]
if arg == 0:
screen.erase_end_of_line()
elif arg == 1:
screen.erase_start_of_line()
elif arg == 2:
screen.erase_line()
def DoEnableScroll (fsm):
screen = fsm.memory[0]
screen.scroll_screen()
def DoCursorSave (fsm):
screen = fsm.memory[0]
screen.cursor_save_attrs()
def DoCursorRestore (fsm):
screen = fsm.memory[0]
screen.cursor_restore_attrs()
def DoScrollRegion (fsm):
screen = fsm.memory[0]
r2 = int(fsm.memory.pop())
r1 = int(fsm.memory.pop())
screen.scroll_screen_rows (r1,r2)
def DoMode (fsm):
screen = fsm.memory[0]
mode = fsm.memory.pop() # Should be 4
# screen.setReplaceMode ()
def DoLog (fsm):
screen = fsm.memory[0]
fsm.memory = [screen]
fout = open ('log', 'a')
fout.write (fsm.input_symbol + ',' + fsm.current_state + '\n')
fout.close()
class term (screen.screen):
'''This class is an abstract, generic terminal.
This does nothing. This is a placeholder that
provides a common base class for other terminals
such as an ANSI terminal. '''
def __init__ (self, r=24, c=80):
screen.screen.__init__(self, r,c)
class ANSI (term):
'''This class implements an ANSI (VT100) terminal.
It is a stream filter that recognizes ANSI terminal
escape sequences and maintains the state of a screen object. '''
def __init__ (self, r=24,c=80):
term.__init__(self,r,c)
#self.screen = screen (24,80)
self.state = FSM.FSM ('INIT',[self])
self.state.set_default_transition (DoLog, 'INIT')
self.state.add_transition_any ('INIT', DoEmit, 'INIT')
self.state.add_transition ('\x1b', 'INIT', None, 'ESC')
self.state.add_transition_any ('ESC', DoLog, 'INIT')
self.state.add_transition ('(', 'ESC', None, 'G0SCS')
self.state.add_transition (')', 'ESC', None, 'G1SCS')
self.state.add_transition_list ('AB012', 'G0SCS', None, 'INIT')
self.state.add_transition_list ('AB012', 'G1SCS', None, 'INIT')
self.state.add_transition ('7', 'ESC', DoCursorSave, 'INIT')
self.state.add_transition ('8', 'ESC', DoCursorRestore, 'INIT')
self.state.add_transition ('M', 'ESC', DoUpReverse, 'INIT')
self.state.add_transition ('>', 'ESC', DoUpReverse, 'INIT')
self.state.add_transition ('<', 'ESC', DoUpReverse, 'INIT')
self.state.add_transition ('=', 'ESC', None, 'INIT') # Selects application keypad.
self.state.add_transition ('#', 'ESC', None, 'GRAPHICS_POUND')
self.state.add_transition_any ('GRAPHICS_POUND', None, 'INIT')
self.state.add_transition ('[', 'ESC', None, 'ELB')
# ELB means Escape Left Bracket. That is ^[[
self.state.add_transition ('H', 'ELB', DoHomeOrigin, 'INIT')
self.state.add_transition ('D', 'ELB', DoBackOne, 'INIT')
self.state.add_transition ('B', 'ELB', DoDownOne, 'INIT')
self.state.add_transition ('C', 'ELB', DoForwardOne, 'INIT')
self.state.add_transition ('A', 'ELB', DoUpOne, 'INIT')
self.state.add_transition ('J', 'ELB', DoEraseDown, 'INIT')
self.state.add_transition ('K', 'ELB', DoEraseEndOfLine, 'INIT')
self.state.add_transition ('r', 'ELB', DoEnableScroll, 'INIT')
self.state.add_transition ('m', 'ELB', None, 'INIT')
self.state.add_transition ('?', 'ELB', None, 'MODECRAP')
self.state.add_transition_list (string.digits, 'ELB', DoStartNumber, 'NUMBER_1')
self.state.add_transition_list (string.digits, 'NUMBER_1', DoBuildNumber, 'NUMBER_1')
self.state.add_transition ('D', 'NUMBER_1', DoBack, 'INIT')
self.state.add_transition ('B', 'NUMBER_1', DoDown, 'INIT')
self.state.add_transition ('C', 'NUMBER_1', DoForward, 'INIT')
self.state.add_transition ('A', 'NUMBER_1', DoUp, 'INIT')
self.state.add_transition ('J', 'NUMBER_1', DoErase, 'INIT')
self.state.add_transition ('K', 'NUMBER_1', DoEraseLine, 'INIT')
self.state.add_transition ('l', 'NUMBER_1', DoMode, 'INIT')
### It gets worse... the 'm' code can have infinite number of
### number;number;number before it. I've never seen more than two,
### but the specs say it's allowed. crap!
self.state.add_transition ('m', 'NUMBER_1', None, 'INIT')
### LED control. Same implementation problem as 'm' code.
self.state.add_transition ('q', 'NUMBER_1', None, 'INIT')
# \E[?47h switch to alternate screen
# \E[?47l restores to normal screen from alternate screen.
self.state.add_transition_list (string.digits, 'MODECRAP', DoStartNumber, 'MODECRAP_NUM')
self.state.add_transition_list (string.digits, 'MODECRAP_NUM', DoBuildNumber, 'MODECRAP_NUM')
self.state.add_transition ('l', 'MODECRAP_NUM', None, 'INIT')
self.state.add_transition ('h', 'MODECRAP_NUM', None, 'INIT')
#RM Reset Mode Esc [ Ps l none
self.state.add_transition (';', 'NUMBER_1', None, 'SEMICOLON')
self.state.add_transition_any ('SEMICOLON', DoLog, 'INIT')
self.state.add_transition_list (string.digits, 'SEMICOLON', DoStartNumber, 'NUMBER_2')
self.state.add_transition_list (string.digits, 'NUMBER_2', DoBuildNumber, 'NUMBER_2')
self.state.add_transition_any ('NUMBER_2', DoLog, 'INIT')
self.state.add_transition ('H', 'NUMBER_2', DoHome, 'INIT')
self.state.add_transition ('f', 'NUMBER_2', DoHome, 'INIT')
self.state.add_transition ('r', 'NUMBER_2', DoScrollRegion, 'INIT')
### It gets worse... the 'm' code can have infinite number of
### number;number;number before it. I've never seen more than two,
### but the specs say it's allowed. crap!
self.state.add_transition ('m', 'NUMBER_2', None, 'INIT')
### LED control. Same problem as 'm' code.
self.state.add_transition ('q', 'NUMBER_2', None, 'INIT')
self.state.add_transition (';', 'NUMBER_2', None, 'SEMICOLON_X')
# Create a state for 'q' and 'm' which allows an infinite number of ignored numbers
self.state.add_transition_any ('SEMICOLON_X', DoLog, 'INIT')
self.state.add_transition_list (string.digits, 'SEMICOLON_X', None, 'NUMBER_X')
self.state.add_transition_any ('NUMBER_X', DoLog, 'INIT')
self.state.add_transition ('m', 'NUMBER_X', None, 'INIT')
self.state.add_transition ('q', 'NUMBER_X', None, 'INIT')
self.state.add_transition (';', 'NUMBER_2', None, 'SEMICOLON_X')
def process (self, c):
"""Process a single byte. Called by :meth:`write`."""
self.state.process(c)
def process_list (self, l):
self.write(l)
def write (self, s):
"""Process text, writing it to the virtual screen while handling
ANSI escape codes.
"""
for c in s:
self.process(c)
def flush (self):
pass
def write_ch (self, ch):
'''This puts a character at the current cursor position. The cursor
position is moved forward with wrap-around, but no scrolling is done if
the cursor hits the lower-right corner of the screen. '''
#\r and \n both produce a call to cr() and lf(), respectively.
ch = ch[0]
if ch == '\r':
self.cr()
return
if ch == '\n':
self.crlf()
return
if ch == chr(screen.BS):
self.cursor_back()
return
if ch not in string.printable:
fout = open ('log', 'a')
fout.write ('Nonprint: ' + str(ord(ch)) + '\n')
fout.close()
return
self.put_abs(self.cur_r, self.cur_c, ch)
old_r = self.cur_r
old_c = self.cur_c
self.cursor_forward()
if old_c == self.cur_c:
self.cursor_down()
if old_r != self.cur_r:
self.cursor_home (self.cur_r, 1)
else:
self.scroll_up ()
self.cursor_home (self.cur_r, 1)
self.erase_line()
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