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GeezerVison is showing github.com — bpython/bpython/urwid.py at master · godhelpjun/bpython Expand file tree/ Copy pathurwid.pyMore file actions 1360 lines (1131 loc) · 50 KB / Copy pathurwid.pyFile metadata and controls1360 lines (1131 loc) · 50 KB 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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 # encoding: utf-8 # # The MIT License # # Copyright (c) 2010-2011 Marien Zwart # # Permission is hereby granted, free of charge, to any person obtaining a copy # of this software and associated documentation files (the "Software"), to deal # in the Software without restriction, including without limitation the rights # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell # copies of the Software, and to permit persons to whom the Software is # furnished to do so, subject to the following conditions: # # The above copyright notice and this permission notice shall be included in # all copies or substantial portions of the Software. # # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN # THE SOFTWARE. """bpython backend based on Urwid. Based on Urwid 0.9.9. This steals many things from bpython's "cli" backend. This is still *VERY* rough. """ from __future__ import absolute_import, division, print_function import sys import os import time import locale import signal from optparse import Option from six.moves import range from six import iteritems, string_types from pygments.token import Token from . import args as bpargs, repl, translations from ._py3compat import py3 from .config import getpreferredencoding from .formatter import theme_map from .importcompletion import find_coroutine from .translations import _ from .keys import urwid_key_dispatch as key_dispatch import urwid if not py3: import inspect Parenthesis = Token.Punctuation.Parenthesis # Urwid colors are: # 'black', 'dark red', 'dark green', 'brown', 'dark blue', # 'dark magenta', 'dark cyan', 'light gray', 'dark gray', # 'light red', 'light green', 'yellow', 'light blue', # 'light magenta', 'light cyan', 'white' # and bpython has: # blacK, Red, Green, Yellow, Blue, Magenta, Cyan, White, Default COLORMAP = { 'k': 'black', 'r': 'dark red', # or light red? 'g': 'dark green', # or light green? 'y': 'yellow', 'b': 'dark blue', # or light blue? 'm': 'dark magenta', # or light magenta? 'c': 'dark cyan', # or light cyan? 'w': 'white', 'd': 'default', } try: from twisted.internet import protocol from twisted.protocols import basic except ImportError: pass else: class EvalProtocol(basic.LineOnlyReceiver): delimiter = '\n' def __init__(self, myrepl): self.repl = myrepl def lineReceived(self, line): # HACK! # TODO: deal with encoding issues here... self.repl.main_loop.process_input(line) self.repl.main_loop.process_input(['enter']) class EvalFactory(protocol.ServerFactory): def __init__(self, myrepl): self.repl = myrepl def buildProtocol(self, addr): return EvalProtocol(self.repl) # If Twisted is not available urwid has no TwistedEventLoop attribute. # Code below will try to import reactor before using TwistedEventLoop. # I assume TwistedEventLoop will be available if that import succeeds. if urwid.VERSION < (1, 0, 0) and hasattr(urwid, 'TwistedEventLoop'): class TwistedEventLoop(urwid.TwistedEventLoop): """TwistedEventLoop modified to properly stop the reactor. urwid 0.9.9 and 0.9.9.1 crash the reactor on ExitMainLoop instead of stopping it. One obvious way this breaks is if anything used the reactor's thread pool: that thread pool is not shut down if the reactor is not stopped, which means python hangs on exit (joining the non-daemon threadpool threads that never exit). And the default resolver is the ThreadedResolver, so if we looked up any names we hang on exit. That is bad enough that we hack up urwid a bit here to exit properly. """ def handle_exit(self, f): def wrapper(*args, **kwargs): try: return f(*args, **kwargs) except urwid.ExitMainLoop: # This is our change. self.reactor.stop() except: # This is the same as in urwid. # We are obviously not supposed to ever hit this. print(sys.exc_info()) self._exc_info = sys.exc_info() self.reactor.crash() return wrapper else: TwistedEventLoop = getattr(urwid, 'TwistedEventLoop', None) class StatusbarEdit(urwid.Edit): """Wrapper around urwid.Edit used for the prompt in Statusbar. This class only adds a single signal that is emitted if the user presses Enter.""" signals = urwid.Edit.signals + ['prompt_enter'] def __init__(self, *args, **kwargs): self.single = False urwid.Edit.__init__(self, *args, **kwargs) def keypress(self, size, key): if self.single: urwid.emit_signal(self, 'prompt_enter', self, key) elif key == 'enter': urwid.emit_signal(self, 'prompt_enter', self, self.get_edit_text()) else: return urwid.Edit.keypress(self, size, key) urwid.register_signal(StatusbarEdit, 'prompt_enter') class Statusbar(object): """Statusbar object, ripped off from bpython.cli. This class provides the status bar at the bottom of the screen. It has message() and prompt() methods for user interactivity, as well as settext() and clear() methods for changing its appearance. The check() method needs to be called repeatedly if the statusbar is going to be aware of when it should update its display after a message() has been called (it'll display for a couple of seconds and then disappear). It should be called as: foo = Statusbar('Initial text to display') or, for a blank statusbar: foo = Statusbar() The "widget" attribute is an urwid widget. """ signals = ['prompt_result'] def __init__(self, config, s=None, main_loop=None): self.config = config self.timer = None self.main_loop = main_loop self.s = s or '' self.text = urwid.Text(('main', self.s)) # use wrap mode 'clip' to just cut off at the end of line self.text.set_wrap_mode('clip') self.edit = StatusbarEdit(('main', '')) urwid.connect_signal(self.edit, 'prompt_enter', self._on_prompt_enter) self.widget = urwid.Columns([self.text, self.edit]) def _check(self, callback, userdata=None): """This is the method is called from the timer to reset the status bar.""" self.timer = None self.settext(self.s) def message(self, s, n=3): """Display a message for a short n seconds on the statusbar and return it to its original state.""" self.settext(s) self.timer = self.main_loop.set_alarm_in(n, self._check) def _reset_timer(self): """Reset the timer from message.""" if self.timer is not None: self.main_loop.remove_alarm(self.timer) self.timer = None def prompt(self, s=None, single=False): """Prompt the user for some input (with the optional prompt 's'). After the user hit enter the signal 'prompt_result' will be emitted and the status bar will be reset. If single is True, the first keypress will be returned.""" self._reset_timer() self.edit.single = single self.edit.set_caption(('main', s or '?')) self.edit.set_edit_text('') # hide the text and display the edit widget if not self.edit in self.widget.widget_list: self.widget.widget_list.append(self.edit) if self.text in self.widget.widget_list: self.widget.widget_list.remove(self.text) self.widget.set_focus_column(0) def settext(self, s, permanent=False): """Set the text on the status bar to a new value. If permanent is True, the new value will be permanent. If that status bar is in prompt mode, the prompt will be aborted. """ self._reset_timer() # hide the edit and display the text widget if self.edit in self.widget.widget_list: self.widget.widget_list.remove(self.edit) if not self.text in self.widget.widget_list: self.widget.widget_list.append(self.text) self.text.set_text(('main', s)) if permanent: self.s = s def clear(self): """Clear the status bar.""" self.settext('') def _on_prompt_enter(self, edit, new_text): """Reset the statusbar and pass the input from the prompt to the caller via 'prompt_result'.""" self.settext(self.s) urwid.emit_signal(self, 'prompt_result', new_text) urwid.register_signal(Statusbar, 'prompt_result') def decoding_input_filter(keys, raw): """Input filter for urwid which decodes each key with the locale's preferred encoding.'""" encoding = locale.getpreferredencoding() converted_keys = list() for key in keys: if isinstance(key, string_types): converted_keys.append(key.decode(encoding)) else: converted_keys.append(key) return converted_keys def format_tokens(tokensource): for token, text in tokensource: if text == '\n': continue # TODO: something about inversing Parenthesis while token not in theme_map: token = token.parent yield (theme_map[token], text) class BPythonEdit(urwid.Edit): """Customized editor *very* tightly interwoven with URWIDRepl. Changes include: - The edit text supports markup, not just the caption. This works by calling set_edit_markup from the change event as well as whenever markup changes while text does not. - The widget can be made readonly, which currently just means it is no longer selectable and stops drawing the cursor. This is currently a one-way operation, but that is just because I only need and test the readwrite->readonly transition. - move_cursor_to_coords is ignored (except for internal calls from keypress or mouse_event). - arrow up/down are ignored. - an "edit-pos-changed" signal is emitted when edit_pos changes. """ signals = ['edit-pos-changed'] def __init__(self, config, *args, **kwargs): self._bpy_text = '' self._bpy_attr = [] self._bpy_selectable = True self._bpy_may_move_cursor = False self.config = config self.tab_length = config.tab_length urwid.Edit.__init__(self, *args, **kwargs) def set_edit_pos(self, pos): urwid.Edit.set_edit_pos(self, pos) self._emit("edit-pos-changed", self.edit_pos) def get_edit_pos(self): return self._edit_pos edit_pos = property(get_edit_pos, set_edit_pos) def make_readonly(self): self._bpy_selectable = False # This is necessary to prevent the listbox we are in getting # fresh cursor coords of None from get_cursor_coords # immediately after we go readonly and then getting a cached # canvas that still has the cursor set. It spots that # inconsistency and raises. self._invalidate() def set_edit_markup(self, markup): """Call this when markup changes but the underlying text does not. You should arrange for this to be called from the 'change' signal. """ if markup: self._bpy_text, self._bpy_attr = urwid.decompose_tagmarkup(markup) else: # decompose_tagmarkup in some urwids fails on the empty list self._bpy_text, self._bpy_attr = '', [] # This is redundant when we're called off the 'change' signal. # I'm assuming this is cheap, making that ok. self._invalidate() def get_text(self): return self._caption + self._bpy_text, self._attrib + self._bpy_attr def selectable(self): return self._bpy_selectable def get_cursor_coords(self, *args, **kwargs): # urwid gets confused if a nonselectable widget has a cursor position. if not self._bpy_selectable: return None return urwid.Edit.get_cursor_coords(self, *args, **kwargs) def render(self, size, focus=False): # XXX I do not want to have to do this, but listbox gets confused # if I do not (getting None out of get_cursor_coords because # we just became unselectable, then having this render a cursor) if not self._bpy_selectable: focus = False return urwid.Edit.render(self, size, focus=focus) def get_pref_col(self, size): # Need to make this deal with us being nonselectable if not self._bpy_selectable: return 'left' return urwid.Edit.get_pref_col(self, size) def move_cursor_to_coords(self, *args): if self._bpy_may_move_cursor: return urwid.Edit.move_cursor_to_coords(self, *args) return False def keypress(self, size, key): if urwid.command_map[key] in ['cursor up', 'cursor down']: # Do not handle up/down arrow, leave them for the repl. return key self._bpy_may_move_cursor = True try: if urwid.command_map[key] == 'cursor max left': self.edit_pos = 0 elif urwid.command_map[key] == 'cursor max right': self.edit_pos = len(self.get_edit_text()) elif urwid.command_map[key] == 'clear word': # ^w if self.edit_pos == 0: return line = self.get_edit_text() # delete any space left of the cursor p = len(line[:self.edit_pos].strip()) line = line[:p] + line[self.edit_pos:] # delete a full word np = line.rfind(' ', 0, p) if np == -1: line = line[p:] np = 0 else: line = line[:np] + line[p:] self.set_edit_text(line) self.edit_pos = np elif urwid.command_map[key] == 'clear line': line = self.get_edit_text() self.set_edit_text(line[self.edit_pos:]) self.edit_pos = 0 elif key == 'backspace': line = self.get_edit_text() cpos = len(line) - self.edit_pos if not (cpos or len(line) % self.tab_length or line.strip()): self.set_edit_text(line[:-self.tab_length]) else: return urwid.Edit.keypress(self, size, key) else: # TODO: Add in specific keypress fetching code here return urwid.Edit.keypress(self, size, key) return None finally: self._bpy_may_move_cursor = False def mouse_event(self, *args): self._bpy_may_move_cursor = True try: return urwid.Edit.mouse_event(self, *args) finally: self._bpy_may_move_cursor = False class BPythonListBox(urwid.ListBox): """Like `urwid.ListBox`, except that it does not eat up and down keys. """ def keypress(self, size, key): if key not in ["up", "down"]: return urwid.ListBox.keypress(self, size, key) return key class Tooltip(urwid.BoxWidget): """Container inspired by Overlay to position our tooltip. bottom_w should be a BoxWidget. The top window currently has to be a listbox to support shrinkwrapping. This passes keyboard events to the bottom instead of the top window. It also positions the top window relative to the cursor position from the bottom window and hides it if there is no cursor. """ def __init__(self, bottom_w, listbox): self.__super.__init__() self.bottom_w = bottom_w self.listbox = listbox # TODO: this linebox should use the 'main' color. self.top_w = urwid.LineBox(listbox) self.tooltip_focus = False def selectable(self): return self.bottom_w.selectable() def keypress(self, size, key): return self.bottom_w.keypress(size, key) def mouse_event(self, size, event, button, col, row, focus): # TODO: pass to top widget if visible and inside it. if not hasattr(self.bottom_w, 'mouse_event'): return False return self.bottom_w.mouse_event( size, event, button, col, row, focus) def get_cursor_coords(self, size): return self.bottom_w.get_cursor_coords(size) def render(self, size, focus=False): maxcol, maxrow = size bottom_c = self.bottom_w.render(size, focus) cursor = bottom_c.cursor if not cursor: # Hide the tooltip if there is no cursor. return bottom_c cursor_x, cursor_y = cursor if cursor_y * 2 < maxrow: # Cursor is in the top half. Tooltip goes below it: y = cursor_y + 1 rows = maxrow - y else: # Cursor is in the bottom half. Tooltip fills the area above: y = 0 rows = cursor_y # HACK: shrink-wrap the tooltip. This is ugly in multiple ways: # - It only works on a listbox. # - It assumes the wrapping LineBox eats one char on each edge. # - It is a loop. # (ideally it would check how much free space there is, # instead of repeatedly trying smaller sizes) while 'bottom' in self.listbox.ends_visible((maxcol - 2, rows - 3)): rows -= 1 # If we're displaying above the cursor move the top edge down: if not y: y = cursor_y - rows # Render *both* windows focused. This is probably not normal in urwid, # but it works nicely. top_c = self.top_w.render((maxcol, rows), focus and self.tooltip_focus) combi_c = urwid.CanvasOverlay(top_c, bottom_c, 0, y) # Use the cursor coordinates from the bottom canvas. canvas = urwid.CompositeCanvas(combi_c) canvas.cursor = cursor return canvas class URWIDInteraction(repl.Interaction): def __init__(self, config, statusbar, frame): repl.Interaction.__init__(self, config, statusbar) self.frame = frame urwid.connect_signal(statusbar, 'prompt_result', self._prompt_result) self.callback = None def confirm(self, q, callback): """Ask for yes or no and call callback to return the result""" def callback_wrapper(result): callback(result.lower() in (_('y'), _('yes'))) self.prompt(q, callback_wrapper, single=True) def notify(self, s, n=10, wait_for_keypress=False): return self.statusbar.message(s, n) def prompt(self, s, callback=None, single=False): """Prompt the user for input. The result will be returned via calling callback. Note that there can only be one prompt active. But the callback can already start a new prompt.""" if self.callback is not None: raise Exception('Prompt already in progress') self.callback = callback self.statusbar.prompt(s, single=single) self.frame.set_focus('footer') def _prompt_result(self, text): self.frame.set_focus('body') if self.callback is not None: # The callback might want to start another prompt, so reset it # before calling the callback. callback = self.callback self.callback = None callback(text) class URWIDRepl(repl.Repl): _time_between_redraws = .05 # seconds def __init__(self, event_loop, palette, interpreter, config): repl.Repl.__init__(self, interpreter, config) self._redraw_handle = None self._redraw_pending = False self._redraw_time = 0 self.listbox = BPythonListBox(urwid.SimpleListWalker([])) self.tooltip = urwid.ListBox(urwid.SimpleListWalker([])) self.tooltip.grid = None self.overlay = Tooltip(self.listbox, self.tooltip) self.stdout_hist = '' # native str (bytes in Py2, unicode in Py3) self.frame = urwid.Frame(self.overlay) if urwid.get_encoding_mode() == 'narrow': input_filter = decoding_input_filter else: input_filter = None # This constructs a raw_display.Screen, which nabs sys.stdin/out. self.main_loop = urwid.MainLoop( self.frame, palette, event_loop=event_loop, unhandled_input=self.handle_input, input_filter=input_filter, handle_mouse=False) # String is straight from bpython.cli self.statusbar = Statusbar(config, _(" <%s> Rewind <%s> Save <%s> Pastebin " " <%s> Pager <%s> Show Source ") % (config.undo_key, config.save_key, config.pastebin_key, config.last_output_key, config.show_source_key), self.main_loop) self.frame.set_footer(self.statusbar.widget) self.interact = URWIDInteraction( self.config, self.statusbar, self.frame) self.edits = [] self.edit = None self.current_output = None self._completion_update_suppressed = False # Bulletproof: this is a value extract_exit_value accepts. self.exit_value = () load_urwid_command_map(config) # Subclasses of Repl need to implement echo, current_line, cw def echo(self, orig_s): s = orig_s.rstrip('\n') if s: if self.current_output is None: self.current_output = urwid.Text(('output', s)) if self.edit is None: self.listbox.body.append(self.current_output) # Focus the widget we just added to force the # listbox to scroll. This causes output to scroll # if the user runs a blocking call that prints # more than a screenful, instead of staying # scrolled to the previous input line and then # jumping to the bottom when done. self.listbox.set_focus(len(self.listbox.body) - 1) else: self.listbox.body.insert(-1, self.current_output) # The edit widget should be focused and *stay* focused. # XXX TODO: make sure the cursor stays in the same spot. self.listbox.set_focus(len(self.listbox.body) - 1) else: # XXX this assumes this all has "output" markup applied. self.current_output.set_text( ('output', self.current_output.text + s)) if orig_s.endswith('\n'): self.current_output = None # If we hit this repeatedly in a loop the redraw is rather # slow (testcase: pprint(__builtins__). So if we have recently # drawn the screen already schedule a call in the future. # # Unfortunately we may hit this function repeatedly through a # blocking call triggered by the user, in which case our # timeout will not run timely as we do not return to urwid's # eventloop. So we manually check if our timeout has long # since expired, and redraw synchronously if it has. if self._redraw_handle is None: self.main_loop.draw_screen() def maybe_redraw(loop, self): if self._redraw_pending: loop.draw_screen() self._redraw_pending = False self._redraw_handle = None self._redraw_handle = self.main_loop.set_alarm_in( self._time_between_redraws, maybe_redraw, self) self._redraw_time = time.time() else: self._redraw_pending = True now = time.time() if now - self._redraw_time > 2 * self._time_between_redraws: # The timeout is well past expired, assume we're # blocked and redraw synchronously. self.main_loop.draw_screen() self._redraw_time = now def _get_current_line(self): if self.edit is None: return '' return self.edit.get_edit_text() def _set_current_line(self, line): self.edit.set_edit_text(line) current_line = property(_get_current_line, _set_current_line, None, "Return the current line (the one the cursor is in).") def cw(self): """Return the current word (incomplete word left of cursor).""" if self.edit is None: return pos = self.edit.edit_pos text = self.edit.get_edit_text() if pos != len(text): # Disable autocomplete if not at end of line, like cli does. return # Stolen from cli. TODO: clean up and split out. if (not text or (not text[-1].isalnum() and text[-1] not in ('.', '_'))): return # Seek backwards in text for the first non-identifier char: for i, c in enumerate(reversed(text)): if not c.isalnum() and c not in ('.', '_'): break else: # No non-identifiers, return everything. return text # Return everything to the right of the non-identifier. return text[-i:] @property def cpos(self): if self.edit is not None: return len(self.current_line) - self.edit.edit_pos return 0 def _get_cursor_offset(self): return self.edit.edit_pos def _set_cursor_offset(self, offset): self.edit.edit_pos = offset cursor_offset = property(_get_cursor_offset, _set_cursor_offset, None, "The cursor offset from the beginning of the line") def _populate_completion(self): widget_list = self.tooltip.body while widget_list: widget_list.pop() # This is just me flailing around wildly. TODO: actually write. if self.complete(): if self.funcprops: # This is mostly just stolen from the cli module. func_name, args, is_bound = self.funcprops in_arg = self.arg_pos args, varargs, varkw, defaults = args[:4] if py3: kwonly = self.funcprops.argspec.kwonly kwonly_defaults = self.funcprops.argspec.kwonly_defaults or {} else: kwonly, kwonly_defaults = [], {} markup = [('bold name', func_name), ('name', ': (')] # the isinstance checks if we're in a positional arg # (instead of a keyword arg), I think if is_bound and isinstance(in_arg, int): in_arg += 1 # bpython.cli checks if this goes off the edge and # does clever wrapping. I do not (yet). for k, i in enumerate(args): if defaults and k + 1 > len(args) - len(defaults): kw = repr(defaults[k - (len(args) - len(defaults))]) else: kw = None if not k and str(i) == 'self': color = 'name' else: color = 'token' if k == in_arg or i == in_arg: color = 'bold ' + color if not py3: # See issue #138: We need to format tuple unpacking correctly # We use the undocumented function inspection.strseq() for # that. Fortunately, that madness is gone in Python 3. markup.append((color, inspect.strseq(i, str))) else: markup.append((color, str(i))) if kw is not None: markup.extend([('punctuation', '='), ('token', kw)]) if k != len(args) - 1: markup.append(('punctuation', ', ')) if varargs: if args: markup.append(('punctuation', ', ')) markup.append(('token', '*' + varargs)) if kwonly: if not varargs: if args: markup.append(('punctuation', ', ')) markup.append(('punctuation', '*')) for arg in kwonly: if arg == in_arg: color = 'bold token' else: color = 'token' markup.extend([('punctuation', ', '), (color, arg)]) if arg in kwonly_defaults: markup.extend([('punctuation', '='), ('token', repr(kwonly_defaults[arg]))]) if varkw: if args or varargs or kwonly: markup.append(('punctuation', ', ')) markup.append(('token', '**' + varkw)) markup.append(('punctuation', ')')) widget_list.append(urwid.Text(markup)) if self.matches_iter.matches: attr_map = {} focus_map = {'main': 'operator'} texts = [urwid.AttrMap(urwid.Text(('main', match)), attr_map, focus_map) for match in self.matches_iter.matches] width = max(text.original_widget.pack()[0] for text in texts) gridflow = urwid.GridFlow(texts, width, 1, 0, 'left') widget_list.append(gridflow) self.tooltip.grid = gridflow self.overlay.tooltip_focus = False else: self.tooltip.grid = None self.frame.body = self.overlay else: self.frame.body = self.listbox self.tooltip.grid = None if self.docstring: # TODO: use self.format_docstring? needs a width/height... docstring = self.docstring widget_list.append(urwid.Text(('comment', docstring))) def reprint_line(self, lineno, tokens): edit = self.edits[-len(self.buffer) + lineno - 1] edit.set_edit_markup(list(format_tokens(tokens))) def getstdout(self): """This method returns the 'spoofed' stdout buffer, for writing to a file or sending to a pastebin or whatever.""" return self.stdout_hist + '\n' def ask_confirmation(self, q): """Ask for yes or no and return boolean""" try: reply = self.statusbar.prompt(q) except ValueError: return False return reply.lower() in ('y', 'yes') def reevaluate(self): """Clear the buffer, redraw the screen and re-evaluate the history""" self.evaluating = True self.stdout_hist = '' self.f_string = '' self.buffer = [] self.scr.erase() self.s_hist = [] # Set cursor position to -1 to prevent paren matching self.cpos = -1 self.prompt(False) self.iy, self.ix = self.scr.getyx() for line in self.history: if py3: self.stdout_hist += line + '\n' else: self.stdout_hist += line.encode( locale.getpreferredencoding()) + '\n' self.print_line(line) self.s_hist[-1] += self.f_string # I decided it was easier to just do this manually # than to make the print_line and history stuff more flexible. self.scr.addstr('\n') more = self.push(line) self.prompt(more) self.iy, self.ix = self.scr.getyx() self.cpos = 0 indent = repl.next_indentation(self.s, self.config.tab_length) self.s = '' self.scr.refresh() if self.buffer: for unused in range(indent): self.tab() self.evaluating = False #map(self.push, self.history) # ^-- That's how simple this method was at first :( def write(self, s): """For overriding stdout defaults""" if '\x04' in s: for block in s.split('\x04'): self.write(block) return if s.rstrip() and '\x03' in s: t = s.split('\x03')[1] else: t = s if not py3 and isinstance(t, unicode): t = t.encode(locale.getpreferredencoding()) if not self.stdout_hist: self.stdout_hist = t else: self.stdout_hist += t self.echo(s) self.s_hist.append(s.rstrip()) def push(self, s, insert_into_history=True): # Restore the original SIGINT handler. This is needed to be able # to break out of infinite loops. If the interpreter itself # sees this it prints 'KeyboardInterrupt' and returns (good). orig_handler = signal.getsignal(signal.SIGINT) signal.signal(signal.SIGINT, signal.default_int_handler) # Pretty blindly adapted from bpython.cli try: return repl.Repl.push(self, s, insert_into_history) except SystemExit as e: self.exit_value = e.args raise urwid.ExitMainLoop() except KeyboardInterrupt: # KeyboardInterrupt happened between the except block around # user code execution and this code. This should be rare, # but make sure to not kill bpython here, so leaning on # ctrl+c to kill buggy code running inside bpython is safe. self.keyboard_interrupt() finally: signal.signal(signal.SIGINT, orig_handler) def start(self): self.prompt(False) def keyboard_interrupt(self): # If the user is currently editing, interrupt him. This # mirrors what the regular python REPL does. if self.edit is not None: # XXX this is a lot of code, and I am not sure it is # actually enough code. Needs some testing. self.edit.make_readonly() self.edit = None self.buffer = [] self.echo('KeyboardInterrupt') self.prompt(False) else: # I do not quite remember if this is reachable, but let's # be safe. self.echo('KeyboardInterrupt') def prompt(self, more): # Clear current output here, or output resulting from the # current prompt run will end up appended to the edit widget # sitting above this prompt: self.current_output = None # XXX is this the right place? self.rl_history.reset() # XXX what is s_hist? # We need the caption to use unicode as urwid normalizes later # input to be the same type, using ascii as encoding. If the # caption is bytes this breaks typing non-ascii into bpython. if not more: caption = ('prompt', self.ps1) if py3: self.stdout_hist += self.ps1 else: self.stdout_hist += self.ps1.encode(getpreferredencoding()) else: caption = ('prompt_more', self.ps2) if py3: self.stdout_hist += self.ps2 else: self.stdout_hist += self.ps2.encode(getpreferredencoding()) self.edit = BPythonEdit(self.config, caption=caption) |
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