Source

pypy / lib_pypy / pyrepl / unix_console.py

  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
#   Copyright 2000-2010 Michael Hudson-Doyle <micahel@gmail.com>
#                       Antonio Cuni
#                       Armin Rigo
#
#                        All Rights Reserved
#
#
# Permission to use, copy, modify, and distribute this software and
# its documentation for any purpose is hereby granted without fee,
# provided that the above copyright notice appear in all copies and
# that both that copyright notice and this permission notice appear in
# supporting documentation.
#
# THE AUTHOR MICHAEL HUDSON 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,
# 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.

import termios, select, os, struct, errno
import signal, re, time, sys
from fcntl import ioctl
from pyrepl import curses
from pyrepl.fancy_termios import tcgetattr, tcsetattr
from pyrepl.console import Console, Event
from pyrepl import unix_eventqueue

class InvalidTerminal(RuntimeError):
    pass

_error = (termios.error, curses.error, InvalidTerminal)

# there are arguments for changing this to "refresh"
SIGWINCH_EVENT = 'repaint'

FIONREAD = getattr(termios, "FIONREAD", None)
TIOCGWINSZ = getattr(termios, "TIOCGWINSZ", None)

def _my_getstr(cap, optional=0):
    r = curses.tigetstr(cap)
    if not optional and r is None:
        raise InvalidTerminal, \
              "terminal doesn't have the required '%s' capability"%cap
    return r

# at this point, can we say: AAAAAAAAAAAAAAAAAAAAAARGH!
def maybe_add_baudrate(dict, rate):
    name = 'B%d'%rate
    if hasattr(termios, name):
        dict[getattr(termios, name)] = rate

ratedict = {}
for r in [0, 110, 115200, 1200, 134, 150, 1800, 19200, 200, 230400,
          2400, 300, 38400, 460800, 4800, 50, 57600, 600, 75, 9600]:
    maybe_add_baudrate(ratedict, r)

del r, maybe_add_baudrate

delayprog = re.compile("\\$<([0-9]+)((?:/|\\*){0,2})>")

try:
    poll = select.poll
except AttributeError:
    # this is exactly the minumum necessary to support what we
    # do with poll objects
    class poll:
        def __init__(self):
            pass
        def register(self, fd, flag):
            self.fd = fd
        def poll(self, timeout=None):
            r,w,e = select.select([self.fd],[],[],timeout)
            return r

POLLIN = getattr(select, "POLLIN", None)

class UnixConsole(Console):
    def __init__(self, f_in=0, f_out=1, term=None, encoding=None):
        if encoding is None:
            encoding = sys.getdefaultencoding()
            
        self.encoding = encoding

        if isinstance(f_in, int):
            self.input_fd = f_in
        else:
            self.input_fd = f_in.fileno()

        if isinstance(f_out, int):
            self.output_fd = f_out
        else:
            self.output_fd = f_out.fileno()
        
        self.pollob = poll()
        self.pollob.register(self.input_fd, POLLIN)
        curses.setupterm(term, self.output_fd)
        self.term = term
        
        self._bel   = _my_getstr("bel")
        self._civis = _my_getstr("civis", optional=1)
        self._clear = _my_getstr("clear")
        self._cnorm = _my_getstr("cnorm", optional=1)
        self._cub   = _my_getstr("cub",   optional=1)
        self._cub1  = _my_getstr("cub1",  1)
        self._cud   = _my_getstr("cud",   1)
        self._cud1  = _my_getstr("cud1",  1)
        self._cuf   = _my_getstr("cuf",   1)
        self._cuf1  = _my_getstr("cuf1",  1)
        self._cup   = _my_getstr("cup")
        self._cuu   = _my_getstr("cuu",   1)
        self._cuu1  = _my_getstr("cuu1",  1)
        self._dch1  = _my_getstr("dch1",  1)
        self._dch   = _my_getstr("dch",   1)
        self._el    = _my_getstr("el")
        self._hpa   = _my_getstr("hpa",   1)
        self._ich   = _my_getstr("ich",   1)
        self._ich1  = _my_getstr("ich1",  1)
        self._ind   = _my_getstr("ind",   1)
        self._pad   = _my_getstr("pad",   1)
        self._ri    = _my_getstr("ri",    1)
        self._rmkx  = _my_getstr("rmkx",  1)
        self._smkx  = _my_getstr("smkx",  1)
        
        ## work out how we're going to sling the cursor around
        if 0 and self._hpa: # hpa don't work in windows telnet :-(
            self.__move_x = self.__move_x_hpa
        elif self._cub and self._cuf:
            self.__move_x = self.__move_x_cub_cuf
        elif self._cub1 and self._cuf1:
            self.__move_x = self.__move_x_cub1_cuf1
        else:
            raise RuntimeError, "insufficient terminal (horizontal)"

        if self._cuu and self._cud:
            self.__move_y = self.__move_y_cuu_cud
        elif self._cuu1 and self._cud1:
            self.__move_y = self.__move_y_cuu1_cud1
        else:
            raise RuntimeError, "insufficient terminal (vertical)"

        if self._dch1:
            self.dch1 = self._dch1
        elif self._dch:
            self.dch1 = curses.tparm(self._dch, 1)
        else:
            self.dch1 = None

        if self._ich1:
            self.ich1 = self._ich1
        elif self._ich:
            self.ich1 = curses.tparm(self._ich, 1)
        else:
            self.ich1 = None

        self.__move = self.__move_short

        self.event_queue = unix_eventqueue.EventQueue(self.input_fd)
        self.partial_char = ''
        self.cursor_visible = 1

    def change_encoding(self, encoding):
        self.encoding = encoding
    
    def refresh(self, screen, cxy):
        # this function is still too long (over 90 lines)

        if not self.__gone_tall:
            while len(self.screen) < min(len(screen), self.height):
                self.__hide_cursor()
                self.__move(0, len(self.screen) - 1)
                self.__write("\n")
                self.__posxy = 0, len(self.screen)
                self.screen.append("")
        else:
            while len(self.screen) < len(screen):
                self.screen.append("")            

        if len(screen) > self.height:
            self.__gone_tall = 1
            self.__move = self.__move_tall

        px, py = self.__posxy
        old_offset = offset = self.__offset
        height = self.height

        if 0:
            global counter
            try:
                counter
            except NameError:
                counter = 0
            self.__write_code(curses.tigetstr("setaf"), counter)
            counter += 1
            if counter > 8:
                counter = 0

        # we make sure the cursor is on the screen, and that we're
        # using all of the screen if we can
        cx, cy = cxy
        if cy < offset:
            offset = cy
        elif cy >= offset + height:
            offset = cy - height + 1
        elif offset > 0 and len(screen) < offset + height:
            offset = max(len(screen) - height, 0)
            screen.append("")

        oldscr = self.screen[old_offset:old_offset + height]
        newscr = screen[offset:offset + height]

        # use hardware scrolling if we have it.
        if old_offset > offset and self._ri:
            self.__hide_cursor()
            self.__write_code(self._cup, 0, 0)
            self.__posxy = 0, old_offset
            for i in range(old_offset - offset):
                self.__write_code(self._ri)
                oldscr.pop(-1)
                oldscr.insert(0, "")
        elif old_offset < offset and self._ind:
            self.__hide_cursor()
            self.__write_code(self._cup, self.height - 1, 0)
            self.__posxy = 0, old_offset + self.height - 1
            for i in range(offset - old_offset):
                self.__write_code(self._ind)
                oldscr.pop(0)
                oldscr.append("")

        self.__offset = offset

        for y, oldline, newline, in zip(range(offset, offset + height),
                                        oldscr,
                                        newscr):
            if oldline != newline:
                self.__write_changed_line(y, oldline, newline, px)
                
        y = len(newscr)
        while y < len(oldscr):
            self.__hide_cursor()
            self.__move(0, y)
            self.__posxy = 0, y
            self.__write_code(self._el)
            y += 1

        self.__show_cursor()
        
        self.screen = screen
        self.move_cursor(cx, cy)
        self.flushoutput()

    def __write_changed_line(self, y, oldline, newline, px):
        # this is frustrating; there's no reason to test (say)
        # self.dch1 inside the loop -- but alternative ways of
        # structuring this function are equally painful (I'm trying to
        # avoid writing code generators these days...)
        x = 0
        minlen = min(len(oldline), len(newline))
        #
        # reuse the oldline as much as possible, but stop as soon as we
        # encounter an ESCAPE, because it might be the start of an escape
        # sequene
        while x < minlen and oldline[x] == newline[x] and newline[x] != '\x1b':
            x += 1
        if oldline[x:] == newline[x+1:] and self.ich1:
            if ( y == self.__posxy[1] and x > self.__posxy[0]
                 and oldline[px:x] == newline[px+1:x+1] ):
                x = px
            self.__move(x, y)
            self.__write_code(self.ich1)
            self.__write(newline[x])
            self.__posxy = x + 1, y
        elif x < minlen and oldline[x + 1:] == newline[x + 1:]:
            self.__move(x, y)
            self.__write(newline[x])
            self.__posxy = x + 1, y
        elif (self.dch1 and self.ich1 and len(newline) == self.width
              and x < len(newline) - 2
              and newline[x+1:-1] == oldline[x:-2]):
            self.__hide_cursor()
            self.__move(self.width - 2, y)
            self.__posxy = self.width - 2, y
            self.__write_code(self.dch1)
            self.__move(x, y)
            self.__write_code(self.ich1)
            self.__write(newline[x])
            self.__posxy = x + 1, y
        else:
            self.__hide_cursor()
            self.__move(x, y)
            if len(oldline) > len(newline):
                self.__write_code(self._el)
            self.__write(newline[x:])
            self.__posxy = len(newline), y
        
        if '\x1b' in newline:
            # ANSI escape characters are present, so we can't assume
            # anything about the position of the cursor.  Moving the cursor
            # to the left margin should work to get to a known position.
            self.move_cursor(0, y)

    def __write(self, text):
        self.__buffer.append((text, 0))

    def __write_code(self, fmt, *args):
        self.__buffer.append((curses.tparm(fmt, *args), 1))

    def __maybe_write_code(self, fmt, *args):
        if fmt:
            self.__write_code(fmt, *args)

    def __move_y_cuu1_cud1(self, y):
        dy = y - self.__posxy[1]
        if dy > 0:
            self.__write_code(dy*self._cud1)
        elif dy < 0:
            self.__write_code((-dy)*self._cuu1)

    def __move_y_cuu_cud(self, y):
        dy = y - self.__posxy[1]
        if dy > 0:
            self.__write_code(self._cud, dy)
        elif dy < 0:
            self.__write_code(self._cuu, -dy)

    def __move_x_hpa(self, x):
        if x != self.__posxy[0]:
            self.__write_code(self._hpa, x)

    def __move_x_cub1_cuf1(self, x):
        dx = x - self.__posxy[0]
        if dx > 0:
            self.__write_code(self._cuf1*dx)
        elif dx < 0:
            self.__write_code(self._cub1*(-dx))

    def __move_x_cub_cuf(self, x):
        dx = x - self.__posxy[0]
        if dx > 0:
            self.__write_code(self._cuf, dx)
        elif dx < 0:
            self.__write_code(self._cub, -dx)

    def __move_short(self, x, y):
        self.__move_x(x)
        self.__move_y(y)

    def __move_tall(self, x, y):
        assert 0 <= y - self.__offset < self.height, y - self.__offset
        self.__write_code(self._cup, y - self.__offset, x)

    def move_cursor(self, x, y):
        if y < self.__offset or y >= self.__offset + self.height:
            self.event_queue.insert(Event('scroll', None))
        else:
            self.__move(x, y)
            self.__posxy = x, y
            self.flushoutput()

    def prepare(self):
        # per-readline preparations:
        self.__svtermstate = tcgetattr(self.input_fd)
        raw = self.__svtermstate.copy()
        raw.iflag &=~ (termios.BRKINT | termios.INPCK |
                       termios.ISTRIP | termios.IXON)
        raw.oflag &=~ (termios.OPOST)
        raw.cflag &=~ (termios.CSIZE|termios.PARENB)
        raw.cflag |=  (termios.CS8)
        raw.lflag &=~ (termios.ICANON|termios.ECHO|
                       termios.IEXTEN|(termios.ISIG*1))
        raw.cc[termios.VMIN] = 1
        raw.cc[termios.VTIME] = 0
        tcsetattr(self.input_fd, termios.TCSADRAIN, raw)

        self.screen = []
        self.height, self.width = self.getheightwidth()

        self.__buffer = []
        
        self.__posxy = 0, 0
        self.__gone_tall = 0
        self.__move = self.__move_short
        self.__offset = 0

        self.__maybe_write_code(self._smkx)

        try:
            self.old_sigwinch = signal.signal(
                signal.SIGWINCH, self.__sigwinch)
        except ValueError:
            pass

    def restore(self):
        self.__maybe_write_code(self._rmkx)
        self.flushoutput()
        tcsetattr(self.input_fd, termios.TCSADRAIN, self.__svtermstate)

        if hasattr(self, 'old_sigwinch'):
            signal.signal(signal.SIGWINCH, self.old_sigwinch)

    def __sigwinch(self, signum, frame):
        self.height, self.width = self.getheightwidth()
        self.event_queue.insert(Event('resize', None))

    def push_char(self, char):
        self.partial_char += char
        try:
            c = unicode(self.partial_char, self.encoding)
        except UnicodeError, e:
            if len(e.args) > 4 and \
                   e.args[4] == 'unexpected end of data':
                pass
            else:
                # was: "raise".  But it crashes pyrepl, and by extension the
                # pypy currently running, in which we are e.g. in the middle
                # of some debugging session.  Argh.  Instead just print an
                # error message to stderr and continue running, for now.
                self.partial_char = ''
                sys.stderr.write('\n%s: %s\n' % (e.__class__.__name__, e))
        else:
            self.partial_char = ''
            self.event_queue.push(c)
        
    def get_event(self, block=1):
        while self.event_queue.empty():
            while 1: # All hail Unix!
                try:
                    self.push_char(os.read(self.input_fd, 1))
                except (IOError, OSError), err:
                    if err.errno == errno.EINTR:
                        if not self.event_queue.empty():
                            return self.event_queue.get()
                        else:
                            continue
                    else:
                        raise
                else:
                    break
            if not block:
                break
        return self.event_queue.get()

    def wait(self):
        self.pollob.poll()

    def set_cursor_vis(self, vis):
        if vis:
            self.__show_cursor()
        else:
            self.__hide_cursor()

    def __hide_cursor(self):
        if self.cursor_visible:
            self.__maybe_write_code(self._civis)
            self.cursor_visible = 0

    def __show_cursor(self):
        if not self.cursor_visible:
            self.__maybe_write_code(self._cnorm)
            self.cursor_visible = 1

    def repaint_prep(self):
        if not self.__gone_tall:
            self.__posxy = 0, self.__posxy[1]
            self.__write("\r")
            ns = len(self.screen)*['\000'*self.width]
            self.screen = ns
        else:
            self.__posxy = 0, self.__offset
            self.__move(0, self.__offset)
            ns = self.height*['\000'*self.width]
            self.screen = ns

    if TIOCGWINSZ:
        def getheightwidth(self):
            try:
                return int(os.environ["LINES"]), int(os.environ["COLUMNS"])
            except KeyError:
                height, width = struct.unpack(
                    "hhhh", ioctl(self.input_fd, TIOCGWINSZ, "\000"*8))[0:2]
                if not height: return 25, 80
                return height, width
    else:
        def getheightwidth(self):
            try:
                return int(os.environ["LINES"]), int(os.environ["COLUMNS"])
            except KeyError:
                return 25, 80

    def forgetinput(self):
        termios.tcflush(self.input_fd, termios.TCIFLUSH)

    def flushoutput(self):
        for text, iscode in self.__buffer:
            if iscode:
                self.__tputs(text)
            else:
                os.write(self.output_fd, text.encode(self.encoding))
        del self.__buffer[:]

    def __tputs(self, fmt, prog=delayprog):
        """A Python implementation of the curses tputs function; the
        curses one can't really be wrapped in a sane manner.

        I have the strong suspicion that this is complexity that
        will never do anyone any good."""
        # using .get() means that things will blow up
        # only if the bps is actually needed (which I'm
        # betting is pretty unlkely)
        bps = ratedict.get(self.__svtermstate.ospeed)
        while 1:
            m = prog.search(fmt)
            if not m:
                os.write(self.output_fd, fmt)
                break
            x, y = m.span()
            os.write(self.output_fd, fmt[:x])
            fmt = fmt[y:]
            delay = int(m.group(1))
            if '*' in m.group(2):
                delay *= self.height
            if self._pad:
                nchars = (bps*delay)/1000
                os.write(self.output_fd, self._pad*nchars)
            else:
                time.sleep(float(delay)/1000.0)

    def finish(self):
        y = len(self.screen) - 1
        while y >= 0 and not self.screen[y]:
            y -= 1
        self.__move(0, min(y, self.height + self.__offset - 1))
        self.__write("\n\r")
        self.flushoutput()

    def beep(self):
        self.__maybe_write_code(self._bel)
        self.flushoutput()

    if FIONREAD:
        def getpending(self):
            e = Event('key', '', '')

            while not self.event_queue.empty():
                e2 = self.event_queue.get()
                e.data += e2.data
                e.raw += e.raw
                
            amount = struct.unpack(
                "i", ioctl(self.input_fd, FIONREAD, "\0\0\0\0"))[0]
            raw = unicode(os.read(self.input_fd, amount), self.encoding, 'replace')
            e.data += raw
            e.raw += raw
            return e
    else:
        def getpending(self):
            e = Event('key', '', '')

            while not self.event_queue.empty():
                e2 = self.event_queue.get()
                e.data += e2.data
                e.raw += e.raw
                
            amount = 10000
            raw = unicode(os.read(self.input_fd, amount), self.encoding, 'replace')
            e.data += raw
            e.raw += raw
            return e

    def clear(self):
        self.__write_code(self._clear)
        self.__gone_tall = 1
        self.__move = self.__move_tall
        self.__posxy = 0, 0
        self.screen = []
Tip: Filter by directory path e.g. /media app.js to search for public/media/app.js.
Tip: Use camelCasing e.g. ProjME to search for ProjectModifiedEvent.java.
Tip: Filter by extension type e.g. /repo .js to search for all .js files in the /repo directory.
Tip: Separate your search with spaces e.g. /ssh pom.xml to search for src/ssh/pom.xml.
Tip: Use ↑ and ↓ arrow keys to navigate and return to view the file.
Tip: You can also navigate files with Ctrl+j (next) and Ctrl+k (previous) and view the file with Ctrl+o.
Tip: You can also navigate files with Alt+j (next) and Alt+k (previous) and view the file with Alt+o.