mirror of
https://github.com/kennethreitz-archive/bpython-gist.git
synced 2026-06-05 23:50:18 +00:00
Bob Farrell
ad410584c9
Now there's an option to require hitting tab to display the completion window instead of having it pop up automatically as you type. You need to edit the source at the moment (change OPTS.auto_display_list), the next commit should have config file support.
1460 lines
45 KiB
Python
1460 lines
45 KiB
Python
#!/usr/bin/env python
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# bpython 0.5.1::fancy curses interface to the Python repl::Bob Farrell 2008
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#
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# The MIT License
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#
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# Copyright (c) 2008 Bob Farrell
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#
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# Permission is hereby granted, free of charge, to any person obtaining a copy
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# of this software and associated documentation files (the "Software"), to deal
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# in the Software without restriction, including without limitation the rights
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# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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# copies of the Software, and to permit persons to whom the Software is
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# furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included in
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# all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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# THE SOFTWARE.
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#
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# Requires at least Python 2.5 and pygments (apt-get install python-pyments)
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#
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import os
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import sys
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import curses
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import code
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import codeop
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import traceback
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import re
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import time
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import math
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import urllib
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import rlcompleter
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import inspect
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import signal
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import struct
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import termios
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import fcntl
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import string
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import ConfigParser
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from bpython.formatter import BPythonFormatter
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class Dummy( object ):
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pass
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OPTS = Dummy()
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OPTS.auto_display_list = True
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try:
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from pygments import highlight
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from pygments.lexers import PythonLexer
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except ImportError:
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OPTS.syntax = False
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else:
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OPTS.syntax = True
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try:
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from pyparsing import Forward, Suppress, QuotedString, dblQuotedString, \
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Group, OneOrMore, ZeroOrMore, Literal, Optional, Word, \
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alphas, alphanums, printables, ParseException
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except ImportError:
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OPTS.argspec = False
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else:
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OPTS.argspec = True
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import pydoc
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# TODO:
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#
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# Keyboard interrupt needs to tidy up the screen afterwards.
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#
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# Ability to require a keypress (e.g. tab) to display autocomplete
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# list.
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#
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# No config file yet. This will allow things like "indent depth" for requiring
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# the user to hit return n times to signify the end of a code block.
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#
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# C-l doesn't repaint the screen yet.
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#
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# Tab completion does not work if not at the end of the line.
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#
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# Triple-quoted strings over multiple lines are not colourised correctly.
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#
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# Numerous optimisations can be made but it seems to do all the lookup stuff
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# fast enough on even my crappy server so I'm not too bothered about that
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# at the moment.
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#
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# The popup window that displays the argspecs and completion suggestions
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# needs to be an instance of a ListWin class or something so I can wrap
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# the addstr stuff to a higher level.
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#
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def DEBUG(s):
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"""This shouldn't ever be called in any release of bpython, so
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beat me up if you find anything calling it."""
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open('/home/bob/tmp/plonker','a').write( "%s\n" % str( s ) )
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def make_colours():
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"""Init all the colours in curses and bang them into a dictionary"""
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for i in range( 63 ):
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if i > 7: j = i / 8
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else: j = -1
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curses.init_pair( i+1, i % 8, j )
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c = {}
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# blacK, Red, Green, Yellow, Blue, Magenta, Cyan, White, Default:
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c["k"] = 0
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c["r"] = 1
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c["g"] = 2
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c["y"] = 3
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c["b"] = 4
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c["m"] = 5
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c["c"] = 6
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c["w"] = 7
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c["d"] = -1
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return c
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class Interpreter( code.InteractiveInterpreter ):
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def showtraceback( self ):
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"""This needs to override the default traceback thing
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so it can put it into a pretty colour and maybe other
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stuff, I don't know"""
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try:
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t, v, tb = sys.exc_info()
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sys.last_type = t
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sys.last_value = v
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sys.last_traceback = tb
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tblist = traceback.extract_tb( tb )
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del tblist[:1]
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l = traceback.format_list( tblist )
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if l:
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l.insert( 0, "Traceback (most recent call last):\n" )
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l[len(l):] = traceback.format_exception_only( t, v )
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finally:
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tblist = tb = None
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self.writetb( l )
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def writetb( self, l ):
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"""This outputs the traceback and should be overridden for anything
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fancy."""
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map( self.write, [ "\x01y\x03%s" % i for i in l ] )
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class Repl( object ):
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"""Implements the necessary guff for a Python-repl-alike interface
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The execution of the code entered and all that stuff was taken from the
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Python code module, I had to copy it instead of inheriting it, I can't
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remember why. The rest of the stuff is basically what makes it fancy.
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It reads what you type, passes it to a lexer and highlighter which
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returns a formatted string. This then gets passed to echo() which
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parses that string and prints to the curses screen in appropriate
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colours and/or bold attribute.
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The Repl class also keeps two stacks of lines that the user has typed in:
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One to be used for the undo feature. I am not happy with the way this works.
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The only way I have been able to think of is to keep the code that's been
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typed in in memory and re-evaluate it in its entirety for each "undo"
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operation. Obviously this means some operations could be extremely slow.
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I'm not even by any means certain that this truly represents a genuine "undo"
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implementation, but it does seem to be generally pretty effective.
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If anyone has any suggestions for how this could be improved, I'd be happy
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to hear them and implement it/accept a patch. I researched a bit into
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the idea of keeping the entire Python state in memory, but this really
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seems very difficult (I believe it may actually be impossible to work)
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and has its own problems too.
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The other stack is for keeping a history for pressing the up/down keys
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to go back and forth between lines.
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"""#TODO: Split the class up a bit so the curses stuff isn't so integrated.
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"""
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"""
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def __init__( self, scr, interp, statusbar=None, idle=None):
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"""Initialise the repl with, unfortunately, a curses screen passed to it.
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This needs to be split up so the curses crap isn't in here.
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interp is a Python code.InteractiveInterpreter instance
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The optional 'idle' parameter is a function that the repl call while
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it's blocking (waiting for keypresses). This, again, should be in a
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different class"""
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self.buffer = []
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self.scr = scr
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self.interp = interp
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self.match = False
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self.rl_hist = []
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self.stdout_hist = []
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self.s_hist = []
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self.history = []
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self.h_i = 0
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self.in_hist = False
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self.evaluating = False
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self.do_exit = False
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self.cpos = 0
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# Use the interpreter's namespace only for the readline stuff:
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self.completer = rlcompleter.Completer( self.interp.locals )
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self.statusbar = statusbar
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self.list_win = curses.newwin( 1, 1, 1, 1 )
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self.idle = idle
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self.f_string = ''
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self.matches = []
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self.argspec = None
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self.tablen = None
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self.s = ''
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self.list_win_visible = False
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if not OPTS.argspec:
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return
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pexp = Forward()
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chars = printables.replace('(', '')
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chars = chars.replace(')', '')
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pexpnest = Optional( Word( chars ) ) + Literal( "(" ) + Optional( Group( pexp ) ) + Optional( Literal( ")" ) )
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pexp << ( OneOrMore( Word( chars ) | pexpnest ) )
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self.pparser = pexp
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def cw( self ):
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"""Return the current word, i.e. the (incomplete) word
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directly to the left of the cursor"""
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if self.cpos: # I don't know if autocomplete should be disabled
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# if the cursor isn't at the end of the line, but that's what this does for now.
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return
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l = len( self.s )
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if not self.s or ( not self.s[ l-1 ].isalnum() and self.s[ l-1 ] not in ( '.', '_' ) ):
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return
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i = 1
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while i < l+1:
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if not self.s[ -i ].isalnum() and self.s[ -i ] not in ( '.', '_' ):
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break
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i += 1
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return self.s[ -i +1: ]
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def get_args( self ):
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"""Check if an unclosed parenthesis exists, then attempt to get the argspec()
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for it. On success, update self.argspec and return True, otherwise set
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self.argspec to None and return False"""
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def getpydocspec( f, func ):
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try:
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argspec = pydoc.getdoc( f )
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except NameError:
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return None
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rx = re.compile( r'([a-zA-Z_][a-zA-Z0-9_]*?)\((.*?)\)' )
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s = rx.search( argspec )
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if s is None:
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return None
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if s.groups()[0] != func:
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return None
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args = [ i.strip() for i in s.groups()[1].split(',') ]
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return [func, (args, None, None, None)]#None, None, None]
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def getargspec( func ):
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try:
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if func in self.interp.locals:
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f = self.interp.locals[ func ]
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except TypeError:
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return None
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else:
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try:
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f = eval( func, self.interp.locals )
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except Exception: # Same deal with the exceptions :(
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return None
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try:
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if inspect.isclass(f):
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argspec = inspect.getargspec( f.__init__ )
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else:
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argspec = inspect.getargspec( f )
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self.argspec = [func, argspec]#[0]]#"Args for %s: " + ", ".join( argspec[0] )
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#self.argspec = self.argspec % func
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return True
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except (NameError, TypeError, KeyError), x:
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t = getpydocspec( f, func )
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if t is None:
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return None
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self.argspec = t
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return True
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except AttributeError: # no __init__
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return None
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def parse_parens( s ):
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"""Run a string through the pyparsing pattern for paren
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counting."""
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try:
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parsed = self.pparser.parseString( s ).asList()
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except ParseException:
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return False
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return parsed
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def walk( seq ):
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"""Walk a nested list and return the last list found that
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doesn't have a close paren in it (i.e. the active function)"""
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r = None
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if isinstance( seq, list ):
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if ")" not in seq and "(" in seq:
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r = seq[ seq.index('(') - 1 ]
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for i in seq:
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t = walk( i )
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if t:
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r = t
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return r
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if not OPTS.argspec:
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return False
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t = parse_parens( self.s )
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if not t:
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return False
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func = walk( t )
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if not func:
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return False
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return getargspec( func )
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def complete( self, tab=False ):
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"""Wrap the _complete method to determine the visibility of list_win
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since there can be several reasons why it won't be displayed; this
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makes it more manageable."""
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if self.list_win_visible and not OPTS.auto_display_list:
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self.scr.touchwin()
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self.list_win_visible = False
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return
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if OPTS.auto_display_list or tab:
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self.list_win_visible = self._complete( tab )
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return
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def _complete( self, tab=False ):
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"""Construct a full list of possible completions and construct and
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display them in a window. Also check if there's an available argspec
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(via the inspect module) and bang that on top of the completions too.
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The return value is whether the list_win is visible or not."""
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words = []
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i = 0
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if not self.get_args():
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self.argspec = None
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cw = self.cw()
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if not (cw or self.argspec):
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self.scr.redrawwin()
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self.scr.refresh()
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return False
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if not cw:
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self.matches = []
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try:
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self.completer.complete( cw, 0 )
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except Exception: # This sucks, but it's either that or list all the
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# exceptions that could possibly be raised here, so if anyone wants to do that,
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# feel free to send me a patch.
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e = True
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else:
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e = False
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if (e or not self.completer.matches) and not self.argspec:
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self.scr.redrawwin()
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return False
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if not e and self.completer.matches:
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self.matches = sorted( set( self.completer.matches ) ) # remove duplicates and
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# restore order
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if len( self.matches ) == 1 and not OPTS.auto_display_list:
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self.list_win_visible = True
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self.tab()
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return False
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self.show_list( self.matches, self.argspec )
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return True
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def show_list( self, items, topline=None ):
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shared = Dummy()
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shared.cols = 0
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shared.rows = 0
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shared.wl = 0
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y, x = self.scr.getyx()
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h, w = self.scr.getmaxyx()
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down = (y < h / 2)
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max_h = h - y if down else y+1
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max_w = int(w * 0.6)
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self.list_win.erase()
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if topline:
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height_offset = self.mkargspec(topline, down) + 1
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else:
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height_offset = 0
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def lsize():
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wl = max( len(i) for i in v_items ) + 1 # longest word length (and a space)
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if not wl:
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wl = 1
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cols = (max_w - 2) / wl
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rows = len( v_items ) / (cols or 1)
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if cols * rows < len( v_items ):
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rows += 1
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if rows + 2 >= max_h:
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rows = max_h - 2
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return False
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shared.rows = rows
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shared.cols = cols
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shared.wl = wl
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return True
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if items:
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v_items = [ items[0][:max_w-3] ] # visible items (we'll append until we can't fit any more in)
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lsize()
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else:
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v_items = []
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for i in items[1:]:
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v_items.append( i[:max_w-3] )
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if not lsize():
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del v_items[-1]
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v_items[-1] = '...'
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break
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rows = shared.rows
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if rows + height_offset < max_h:
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rows += height_offset
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display_rows = rows
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else:
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display_rows = rows + height_offset
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cols = shared.cols
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wl = shared.wl
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if topline and not v_items:
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w = max_w
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elif wl + 3 > max_w:
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w = max_w
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else:
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w = (cols + 1) * wl + 3
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if height_offset and display_rows+5 >= max_h:
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del v_items[-(cols * (height_offset)):]
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self.list_win.resize( rows+2, w )#(cols + 1) * wl + 3 )
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if down:
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self.list_win.mvwin(y+1, 0)
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else:
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self.list_win.mvwin(y-rows-2, 0)
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if v_items:
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self.list_win.addstr( '\n ' )
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for ix, i in enumerate(v_items):
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padding = (wl - len(i)) * ' '
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self.list_win.addstr( i + padding, curses.color_pair( self._C["c"]+1 ) )
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if ((cols == 1) or (ix and not ix % cols)) and ix+1 < len(v_items):
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self.list_win.addstr( '\n ' )
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# XXX: After all the trouble I had with sizing the list box (I'm not very good
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# at that type of thing) I decided to do this bit of tidying up here just to make
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# sure there's no unnececessary blank lines, it makes things look nicer. :)
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y = self.list_win.getyx()[0]
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self.list_win.resize(y + 2, w )
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self.statusbar.win.touchwin()
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self.statusbar.win.noutrefresh()
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self.list_win.border()
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self.scr.touchwin()
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self.scr.cursyncup()
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self.scr.noutrefresh()
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self.scr.move( *self.scr.getyx() )
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self.list_win.refresh()
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|
|
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def mkargspec( self, topline, down ):
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"""This figures out what to do with the argspec and puts it nicely into
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the list window. It returns the number of lines used to display the argspec.
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It's also kind of messy due to it having to call so many addstr() to get
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the colouring right, but it seems to be pretty sturdy."""
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r = 3
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fn = topline[0]
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args = topline[1][0]
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kwargs = topline[1][3]
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_args = topline[1][1]
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_kwargs = topline[1][2]
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max_w = int(self.scr.getmaxyx()[1] * 0.6)
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self.list_win.erase()
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self.list_win.resize( 3, max_w )
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h, w = self.list_win.getmaxyx()
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self.list_win.addstr( '\n ')
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|
self.list_win.addstr( fn, curses.color_pair( self._C["b"]+1 ) | curses.A_BOLD )
|
|
self.list_win.addstr( ': ( ', curses.color_pair( self._C["y"]+1 ) )
|
|
maxh = self.scr.getmaxyx()[0]
|
|
|
|
for k, i in enumerate( args ):
|
|
y, x = self.list_win.getyx()
|
|
ln = len( str(i) )
|
|
kw = None
|
|
if kwargs and k+1 > len(args) - len(kwargs):
|
|
kw = '%s' % str(kwargs[ k - (len(args) - len(kwargs))])
|
|
ln += len( kw ) + 1
|
|
|
|
if ln + x >= w:
|
|
ty = self.list_win.getbegyx()[0]
|
|
if not down and ty > 0:
|
|
h +=1
|
|
self.list_win.mvwin( ty-1, 1 )
|
|
self.list_win.resize(h,w)
|
|
elif down and h + r < maxh-ty:
|
|
h += 1
|
|
self.list_win.resize(h,w)
|
|
else:
|
|
break
|
|
r += 1
|
|
self.list_win.addstr('\n\t')
|
|
|
|
self.list_win.addstr( str(i), curses.color_pair( self._C["g"]+1 ) | curses.A_BOLD )
|
|
if kw:
|
|
self.list_win.addstr( '=', curses.color_pair( self._C["c"]+1 ) )
|
|
self.list_win.addstr( kw, curses.color_pair( self._C["g"]+1) )
|
|
if k != len(args) -1:
|
|
self.list_win.addstr( ', ', curses.color_pair( self._C["g"]+1 ) )
|
|
|
|
if _args:
|
|
self.list_win.addstr( ', ', curses.color_pair( self._C["g"]+1 ) )
|
|
self.list_win.addstr( '*%s' % _args, curses.color_pair( self._C["m"]+1 ) )
|
|
if _kwargs:
|
|
self.list_win.addstr( ', ', curses.color_pair( self._C["g"]+1 ) )
|
|
self.list_win.addstr( '**%s' % _kwargs, curses.color_pair( self._C["m"]+1 ) )
|
|
self.list_win.addstr( ' )', curses.color_pair( self._C["y"]+1 ) )
|
|
|
|
return r
|
|
|
|
def getstdout( self ):
|
|
"""This method returns the 'spoofed' stdout buffer, for writing to a file
|
|
or sending to a pastebin or whatever."""
|
|
|
|
return "\n".join( self.stdout_hist )
|
|
|
|
def write2file( self ):
|
|
"""Prompt for a filename and write the current contents of the stdout buffer
|
|
to disk."""
|
|
|
|
fn = self.statusbar.prompt( 'Save to file: ' )
|
|
|
|
if fn.startswith('~'):
|
|
fn = os.path.expanduser( fn )
|
|
|
|
s = self.getstdout()
|
|
|
|
try:
|
|
f = open( fn, 'w' )
|
|
f.write( s )
|
|
f.close()
|
|
except IOError:
|
|
self.statusbar.message("Disk write error for file '%s'." % fn )
|
|
else:
|
|
self.statusbar.message( 'Saved to %s' % fn )
|
|
|
|
def pastebin( self ):
|
|
"""Upload to a pastebin and display the URL in the status bar."""
|
|
|
|
s = self.getstdout()
|
|
url = 'http://rafb.net/paste/paste.php'
|
|
pdata = { 'lang' : 'Python',
|
|
'cvt_tabs' : 'No',
|
|
'text' : s }
|
|
pdata = urllib.urlencode( pdata )
|
|
|
|
self.statusbar.message( 'Posting data to pastebin...' )
|
|
u = urllib.urlopen( url, data=pdata )
|
|
d = u.read()
|
|
|
|
rx = re.search( '(http://rafb.net/p/[0-9a-zA-Z]+\.html)', d )
|
|
if not rx:
|
|
self.statusbar.message( 'Error parsing pastebin URL! Please report a bug.' )
|
|
return
|
|
|
|
|
|
r_url = rx.groups()[ 0 ]
|
|
self.statusbar.message( 'Pastebin URL: %s' % r_url, 10 )
|
|
|
|
|
|
def make_list( self, items ):
|
|
"""Compile a list of items. At the moment this simply returns
|
|
the list; it's here in case I decide to add any more functionality.
|
|
I originally had this method return a list of items where each item
|
|
was prepended with a number/letter so the user could choose an option
|
|
but it doesn't seem appropriate for readline-like behaviour."""
|
|
|
|
return items
|
|
|
|
|
|
def push( self, s ):
|
|
"""Push a line of code onto the buffer so it can process it all
|
|
at once when a code block ends"""
|
|
s = s.rstrip('\n')
|
|
self.buffer.append( s )
|
|
|
|
more = self.interp.runsource( "\n".join( self.buffer ) )
|
|
|
|
if not more:
|
|
self.buffer = []
|
|
|
|
return more
|
|
|
|
def undo( self, n=1 ):
|
|
"""Go back in the undo history n steps and call reeavluate()
|
|
Note that in the program this is called "Rewind" because I
|
|
want it to be clear that this is by no means a true undo
|
|
implementation, it is merely a convenience bonus."""
|
|
if not self.history:
|
|
return None
|
|
|
|
if len( self.history ) < n:
|
|
n = len( self.history )
|
|
|
|
self.history = self.history[ : -n ]
|
|
self.reevaluate()
|
|
|
|
def enter_hist( self ):
|
|
"""Set flags for entering into the history by pressing up/down"""
|
|
if not self.in_hist:
|
|
self.in_hist = True
|
|
self.ts = self.s
|
|
|
|
def back( self ):
|
|
"""Replace the active line with previous line in history and
|
|
increment the index to keep track"""
|
|
|
|
if not self.rl_hist:
|
|
return None
|
|
|
|
self.cpos = 0
|
|
self.enter_hist()
|
|
|
|
if self.h_i < len( self.rl_hist ):
|
|
self.h_i += 1
|
|
|
|
self.s = self.rl_hist[ -self.h_i ].rstrip('\n')
|
|
self.print_line( self.s, clr=True )
|
|
|
|
def fwd( self ):
|
|
"""Same as back() but, well, forward"""
|
|
|
|
self.enter_hist()
|
|
|
|
self.cpos = 0
|
|
|
|
if self.h_i > 1:
|
|
self.h_i -= 1
|
|
self.s = self.rl_hist[ -self.h_i ]
|
|
else:
|
|
self.h_i = 0
|
|
self.s = self.ts
|
|
self.ts = ''
|
|
self.in_hist = False
|
|
|
|
self.print_line( self.s, clr=True )
|
|
|
|
def redraw( self ):
|
|
"""Redraw the screen."""
|
|
self.scr.erase()
|
|
for k, s in enumerate( self.s_hist ):
|
|
if not s:
|
|
continue
|
|
self.iy, self.ix = self.scr.getyx()
|
|
for i in s.split('\x04'):
|
|
self.echo( i, redraw=False )
|
|
if k < len( self.s_hist ) -1:
|
|
self.scr.addstr( '\n' )
|
|
self.iy, self.ix = self.scr.getyx()
|
|
self.print_line( self.s )
|
|
self.scr.refresh()
|
|
self.statusbar.refresh()
|
|
|
|
def reevaluate( self ):
|
|
"""Clear the buffer, redraw the screen and re-evaluate the history"""
|
|
|
|
self.evaluating = True
|
|
self.stdout_hist = []
|
|
self.f_string = ''
|
|
self.stdout_hist = []
|
|
self.buffer = []
|
|
self.scr.erase()
|
|
self.s_hist = []
|
|
|
|
self.prompt( False )
|
|
|
|
self.iy, self.ix = self.scr.getyx()
|
|
for line in self.history:
|
|
self.stdout_hist[-1] += line.rstrip('\n')
|
|
self.print_line( line )
|
|
self.s_hist[-1] += self.f_string
|
|
self.scr.addstr( '\n' ) # I decided it was easier to just do this manually
|
|
# than to make the print_line and history stuff more flexible.
|
|
more = self.push( line )
|
|
self.prompt( more )
|
|
self.iy, self.ix = self.scr.getyx()
|
|
|
|
self.s = ''
|
|
self.scr.refresh()
|
|
|
|
self.evaluating = False
|
|
#map( self.push, self.history ) # <-- That's how simple this function was at first :(
|
|
|
|
def prompt( self, more ):
|
|
"""Show the appropriate Python prompt"""
|
|
if not more:
|
|
self.echo( "\x01g\x03>>> " )
|
|
self.stdout_hist.append('>>> ')
|
|
self.s_hist.append( '\x01g\x03>>> \x04' )
|
|
else:
|
|
self.echo( "\x01r\x03... " )
|
|
self.stdout_hist.append('... ')
|
|
self.s_hist.append( '\x01r\x03... \x04' )
|
|
|
|
def repl( self ):
|
|
"""Initialise the repl and jump into the loop. This method also
|
|
has to keep a stack of lines entered for the horrible "undo"
|
|
feature. It also tracks everything that would normally go to stdout
|
|
in the normal Python interpreter so it can quickly write it to
|
|
stdout on exit after curses.endwin(), as well as a history of lines
|
|
entered for using up/down to go back and forth (which has to be separate
|
|
to the evaluation history, which will be truncated when undoing."""
|
|
|
|
# This was a feature request to have the PYTHONSTARTUP
|
|
# file executed on startup - I personally don't use this
|
|
# feature so please notify me of any breakage.
|
|
filename = os.environ.get('PYTHONSTARTUP')
|
|
if filename and os.path.isfile(filename):
|
|
for line in open(filename, 'r'):
|
|
self.push( line )
|
|
self.push( '\n' )
|
|
|
|
# The regular help() function uses PAGER to display the help, which
|
|
# screws with bpython.
|
|
from bpython import internal
|
|
internal.window = self.scr
|
|
self.push('from bpython import internal\n')
|
|
self.push('help = internal._help')
|
|
|
|
self.iy, self.ix = self.scr.getyx()
|
|
more = False
|
|
while not self.do_exit:
|
|
self.f_string = ''
|
|
self.prompt( more )
|
|
try:
|
|
inp = self.get_line()
|
|
except KeyboardInterrupt:
|
|
self.statusbar.message('KeyboardInterrupt')
|
|
self.scr.addstr('\n')
|
|
continue
|
|
|
|
self.scr.redrawwin()
|
|
if self.do_exit:
|
|
return
|
|
self.h_i = 0
|
|
self.history.append( inp )
|
|
self.s_hist[-1] += self.f_string
|
|
self.stdout_hist[-1] += inp.rstrip('\n')
|
|
self.rl_hist.append( inp ) # Keep two copies so you can go up and down in the hist
|
|
more = self.push( inp )
|
|
|
|
def size( self, scr ):
|
|
"""Set instance attributes for x and y top left corner coordinates
|
|
and width and heigth for the window."""
|
|
h, w = stdscr.getmaxyx()
|
|
self.y = 0
|
|
self.w = w
|
|
self.h = h-1
|
|
self.x = 0
|
|
|
|
def resize( self ):
|
|
"""This method exists simply to keep it straight forward when initialising
|
|
a window and resizing it."""
|
|
self.size( self.scr )
|
|
self.scr.erase()
|
|
self.scr.resize( self.h, self.w )
|
|
self.scr.mvwin( self.y, self.x )
|
|
self.redraw()
|
|
|
|
def write( self, s ):
|
|
"""For overriding stdout defaults"""
|
|
if s.rstrip('\n'):
|
|
if '\x03' in s:
|
|
t = s.split('\x03')[1].rstrip('\n')
|
|
else:
|
|
t = s.rstrip('\n')
|
|
self.stdout_hist.append( t )
|
|
self.echo( s )
|
|
self.s_hist.append( s.rstrip('\n') )
|
|
|
|
def flush( self ):
|
|
"""Olivier Grisel brought it to my attention that the logging
|
|
module tries to call this method, since it makes assumptions
|
|
about stdout that may not necessarily be true. The docs for
|
|
sys.stdout say:
|
|
|
|
"stdout and stderr needn't be built-in file objects: any
|
|
object is acceptable as long as it has a write() method
|
|
that takes a string argument."
|
|
|
|
So I consider this to be a bug in logging, and this is a hack
|
|
to fix it, unfortunately. I'm sure it's not the only module
|
|
to do it."""
|
|
pass
|
|
|
|
def close( self ):
|
|
"""See the flush() method docstring."""
|
|
pass
|
|
|
|
def echo( self, s, redraw=True ):
|
|
"""Parse and echo a formatted string with appropriate attributes. It uses the
|
|
formatting method as defined in formatter.py to parse the srings. It won't update
|
|
the screen if it's reevaluating the code (as it does with undo)."""
|
|
|
|
a = curses.color_pair( 0 )
|
|
if '\x01' in s:
|
|
rx = re.search( '\x01([a-z])([a-z]?)', s )
|
|
if rx:
|
|
p = self._C[ rx.groups()[ 0 ] ]
|
|
if rx.groups()[ 1 ]:
|
|
p *= self._C[ rx.groups()[ 1 ] ]
|
|
|
|
a = curses.color_pair( int( p ) + 1 )
|
|
s = re.sub( '\x01[a-z][a-z]?', '', s )
|
|
|
|
if '\x02' in s:
|
|
a = a | curses.A_BOLD
|
|
s = s.replace( '\x02', '' )
|
|
s = s.replace( '\x03', '' )
|
|
s = s.replace( '\x01', '' )
|
|
|
|
|
|
self.scr.addstr( s, a )
|
|
|
|
if redraw and not self.evaluating:
|
|
self.scr.refresh()
|
|
|
|
def mvc( self, i, refresh=True ):
|
|
"""This method moves the cursor relatively from the current
|
|
position, where:
|
|
0 == (right) end of current line
|
|
length of current line len(self.s) == beginning of current line
|
|
and:
|
|
current cursor position + i
|
|
for positive values of i the cursor will move towards the beginning
|
|
of the line, negative values the opposite."""
|
|
y, x = self.scr.getyx()
|
|
|
|
if self.cpos == 0 and i < 0:
|
|
return
|
|
|
|
if x == self.ix and y == self.iy and i >= 1:
|
|
return
|
|
|
|
h, w = gethw()
|
|
if x - i < 0:
|
|
y -= 1
|
|
x = w
|
|
|
|
if x - i >= w:
|
|
y += 1
|
|
x = 0 + i
|
|
|
|
self.cpos += i
|
|
self.scr.move( y, x - i )
|
|
if refresh:
|
|
self.scr.refresh()
|
|
|
|
def bs( self ):
|
|
"""Process a backspace"""
|
|
|
|
y, x = self.scr.getyx()
|
|
|
|
if not self.s:
|
|
return
|
|
|
|
if x == self.ix and y == self.iy:
|
|
return
|
|
|
|
n = 1
|
|
|
|
if x == 0:
|
|
y -= 1
|
|
x = gethw()[1]
|
|
|
|
if not self.cpos: # I know the nested if blocks look nasty. :(
|
|
if self.s[-1] == '\t':
|
|
n = self.tablen
|
|
if len(self.s) > 1:
|
|
n = n * 2
|
|
|
|
self.s = self.s[ : -1 ]
|
|
else:
|
|
self.s = self.s[ : -self.cpos-1 ] + self.s[ -self.cpos : ]
|
|
|
|
for i in range(n):
|
|
self.scr.delch( y, x - n )
|
|
self.scr.refresh()
|
|
|
|
def clrtobol( self ):
|
|
"""Clear from cursor to beginning of line; usual C-u behaviour"""
|
|
if not self.cpos:
|
|
self.s = ''
|
|
else:
|
|
self.s = self.s[ self.cpos : ]
|
|
|
|
self.print_line( self.s, clr=True )
|
|
self.scr.redrawwin()
|
|
self.scr.refresh()
|
|
|
|
def p_key( self ):
|
|
"""Process a keypress"""
|
|
|
|
|
|
if self.c is None:
|
|
return ''
|
|
|
|
if self.c == chr(8): # C-Backspace (on my computer anyway!)
|
|
self.clrtobol()
|
|
self.c = '\n'
|
|
# Don't return; let it get handled
|
|
if self.c == chr( 27 ):
|
|
return ''
|
|
|
|
if self.c in ( chr(127), 'KEY_BACKSPACE' ):
|
|
self.bs()
|
|
self.complete()
|
|
return ''
|
|
|
|
elif self.c == chr(18):# C-r
|
|
self.undo()
|
|
return ''
|
|
|
|
elif self.c == 'KEY_UP': # Cursor Up
|
|
self.back()
|
|
return ''
|
|
|
|
elif self.c == 'KEY_DOWN': # Cursor Down
|
|
self.fwd()
|
|
return ''
|
|
|
|
elif self.c == 'KEY_LEFT': # Cursor Left
|
|
self.mvc( 1 )
|
|
|
|
elif self.c == 'KEY_RIGHT': # Cursor Right
|
|
self.mvc( -1 )
|
|
|
|
elif self.c in ('^U', chr(21) ): # C-u
|
|
self.clrtobol()
|
|
return ''
|
|
|
|
elif self.c in ('^L', chr(12) ): # C-l
|
|
self.redraw()
|
|
return ''
|
|
|
|
elif self.c in ( chr(4), '^D' ): # C-d
|
|
self.do_exit = True
|
|
return None
|
|
|
|
elif self.c == 'KEY_F(2)':
|
|
self.write2file()
|
|
return ''
|
|
|
|
elif self.c == 'KEY_F(8)':
|
|
self.pastebin()
|
|
return ''
|
|
|
|
elif self.c == '\n':
|
|
self.lf()
|
|
return None
|
|
|
|
elif self.c == '\t':
|
|
return self.tab()
|
|
|
|
elif len( self.c ) == 1 and self.c in string.printable:#ord( self.c ) <= 127:
|
|
self.addc( self.c )
|
|
self.print_line( self.s )
|
|
|
|
else:
|
|
return ''
|
|
|
|
|
|
return True
|
|
|
|
def tab( self ):
|
|
"""Process the tab key being hit. If there's only whitespace
|
|
in the line or the line is blank then process a normal tab,
|
|
otherwise attempt to autocomplete to the best match of possible
|
|
choices in the match list."""
|
|
|
|
if self.tablen is None:
|
|
x = self.scr.getyx()[1]
|
|
|
|
if self.atbol():
|
|
self.addc( self.c )
|
|
self.print_line( self.s )
|
|
if self.tablen is None:
|
|
self.tablen = self.scr.getyx()[1] - x
|
|
return True
|
|
|
|
if not OPTS.auto_display_list and not self.list_win_visible:
|
|
self.complete( tab=True )
|
|
return True
|
|
|
|
cw = self.cw()
|
|
if not cw:
|
|
return True
|
|
|
|
b = self.strbase( self.matches )
|
|
if b:
|
|
self.s += b[ len( cw ) : ]
|
|
self.print_line( self.s )
|
|
if len( self.matches ) == 1 and OPTS.auto_display_list:
|
|
self.scr.touchwin()
|
|
return True
|
|
|
|
def strbase( self, l ):
|
|
"""Probably not the best way of doing it but this function returns
|
|
a common base string in a list of strings (for tab completion)."""
|
|
|
|
if len( l ) == 1:
|
|
return l[0]
|
|
|
|
sl = sorted( l, key=str.__len__ )
|
|
for i, c in enumerate( l[-1] ):
|
|
if not all( k.startswith( l[-1][:i] ) for k in sl ):
|
|
break
|
|
|
|
return l[-1][:i-1]
|
|
|
|
def atbol( self ):
|
|
"""Return True or False accordingly if the cursor is at the beginning
|
|
of the line (whitespace is ignored). This exists so that p_key() knows
|
|
how to handle the tab key being pressed - if there is nothing but white
|
|
space before the cursor then process it as a normal tab otherwise attempt
|
|
tab completion."""
|
|
|
|
if not self.s.lstrip():
|
|
return True
|
|
|
|
def lf( self ):
|
|
"""Process a linefeed character; it only needs to check the
|
|
cursor position and move appropriately so it doesn't clear
|
|
the current line after the cursor."""
|
|
if self.cpos:
|
|
for i in range( self.cpos ):
|
|
self.mvc( -1 )
|
|
|
|
self.echo( "\n" )
|
|
|
|
def addc( self, c ):
|
|
"""Add a character to the current input line and figure out
|
|
where it should go, depending on the cursor position."""
|
|
if not self.cpos:
|
|
self.s += self.c
|
|
else:
|
|
l = len( self.s )
|
|
self.s = self.s[ : l - self.cpos ] + self.c + self.s[ l - self.cpos : ]
|
|
|
|
self.complete()
|
|
|
|
def print_line( self, s, clr=False ):
|
|
"""Chuck a line of text through the highlighter, move the cursor
|
|
to the beginning of the line and output it to the screen."""
|
|
|
|
if not s:
|
|
clr = True
|
|
|
|
if OPTS.syntax:
|
|
o = highlight( s, PythonLexer(), BPythonFormatter() )
|
|
else:
|
|
o = s
|
|
|
|
self.f_string = o
|
|
self.scr.move( self.iy, self.ix )
|
|
|
|
if clr:
|
|
self.scr.clrtoeol()
|
|
|
|
if clr and not s:
|
|
self.scr.refresh()
|
|
|
|
if o:
|
|
for t in o.split('\x04'):
|
|
self.echo( t.rstrip('\n') )
|
|
|
|
if self.cpos:
|
|
t = self.cpos
|
|
for i in range( self.cpos ):
|
|
self.mvc( 1 )
|
|
self.cpos = t
|
|
|
|
def get_line( self ):
|
|
"""Get a line of text and return it
|
|
This function initialises an empty string and gets the
|
|
curses cursor position on the screen and stores it
|
|
for the echo() function to use later (I think).
|
|
Then it waits for key presses and passes them to p_key(),
|
|
which returns None if Enter is pressed (that means "Return",
|
|
idiot)."""
|
|
|
|
self.ts = ''
|
|
n_indent = re.split( '[^\t]', self.s, 1 )[0].count('\t')
|
|
indent = self.s.endswith(':')
|
|
self.s = ''
|
|
self.iy, self.ix = self.scr.getyx()
|
|
|
|
for i in range(n_indent):
|
|
self.c = '\t'
|
|
self.p_key()
|
|
|
|
if indent:
|
|
self.c = '\t'
|
|
self.p_key()
|
|
|
|
self.c = None
|
|
self.cpos = 0
|
|
while True:
|
|
if self.idle:
|
|
self.idle( self )
|
|
try:
|
|
self.c = self.scr.getkey()
|
|
except curses.error: # I'm quite annoyed with the ambiguity of
|
|
# this exception handler. I previously caught "curses.error, x" and accessed
|
|
# x.message and checked that it was "no input", which seemed a crappy way of
|
|
# doing it. But then I ran it on a different computer and the exception
|
|
# seems to have entirely different attributes. So let's hope getkey() doesn't
|
|
# raise any other crazy curses exceptions. :)
|
|
continue
|
|
|
|
if self.p_key() is None:
|
|
return self.s
|
|
|
|
class Statusbar( object ):
|
|
"""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( stdscr, scr, 'Initial text to display' )
|
|
or, for a blank statusbar:
|
|
foo = Statusbar( stdscr, scr )
|
|
|
|
It can also receive the argument 'c' which will be an integer referring
|
|
to a curses colour pair, e.g.:
|
|
foo = Statusbar( stdscr, 'Hello', c=4 )
|
|
|
|
stdscr should be a curses window object in which to put the status bar.
|
|
pwin should be the parent window. To be honest, this is only really here
|
|
so the cursor can be returned to the window properly.
|
|
|
|
"""
|
|
|
|
def __init__( self, scr, pwin, s=None, c=None ):
|
|
"""Initialise the statusbar and display the initial (text if there is any)"""
|
|
self.size( scr )
|
|
self.win = curses.newwin( self.h, self.w, self.y, self.x )
|
|
|
|
self.s = s or ''
|
|
self._s = self.s
|
|
self.c = c
|
|
self.timer = 0
|
|
self.pwin = pwin
|
|
self.settext( s, c )
|
|
|
|
def size( self, scr ):
|
|
"""Set instance attributes for x and y top left corner coordinates
|
|
and width and heigth for the window."""
|
|
h, w = gethw()
|
|
self.y = h-1
|
|
self.w = w
|
|
self.h = 1
|
|
self.x = 0
|
|
|
|
def resize( self ):
|
|
"""This method exists simply to keep it straight forward when initialising
|
|
a window and resizing it."""
|
|
self.size( self.win )
|
|
self.win.mvwin( self.y, self.x )
|
|
self.win.resize( self.h, self.w )
|
|
self.refresh()
|
|
|
|
def refresh( self ):
|
|
"""This is here to make sure the status bar text is redraw properly
|
|
after a resize."""
|
|
self.settext( self._s )
|
|
|
|
def check( self ):
|
|
"""This is the method that should be called every half second or so
|
|
to see if the status bar needs updating."""
|
|
if not self.timer:
|
|
return
|
|
|
|
if time.time() < self.timer:
|
|
return
|
|
|
|
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.timer = time.time() + n
|
|
self.settext( s )
|
|
|
|
|
|
def prompt( self, s='' ):
|
|
"""Prompt the user for some input (with the optional prompt 's') and
|
|
return the input text, then restore the statusbar to its original value."""
|
|
|
|
self.settext( s or '? ', p=True )
|
|
iy, ix = self.win.getyx()
|
|
|
|
def bs( s ):
|
|
y, x = self.win.getyx()
|
|
if x == ix:
|
|
return s
|
|
s = s[:-1]
|
|
self.win.delch(y,x-1)
|
|
self.win.move(y,x-1)
|
|
return s
|
|
|
|
o = ''
|
|
while True:
|
|
c = self.win.getch()
|
|
|
|
if c == 127:
|
|
o = bs( o )
|
|
continue
|
|
|
|
if not c or c > 127:
|
|
continue
|
|
c = chr( c )
|
|
|
|
if c == '\n':
|
|
break
|
|
|
|
self.win.addstr( c )
|
|
o += c
|
|
|
|
self.settext( self._s )
|
|
return o
|
|
|
|
def settext( self, s, c=None, p=False ):
|
|
"""Set the text on the status bar to a new permanent value; this is the value
|
|
that will be set after a prompt or message. c is the optional curses colour
|
|
pair to use (if not specified the last specified colour pair will be used).
|
|
p is True if the cursor is expected to stay in the status window (e.g. when
|
|
prompting)."""
|
|
|
|
self.win.erase()
|
|
if len( s ) >= self.w:
|
|
s = s[ : self.w-1 ]
|
|
|
|
self.s = s
|
|
if c:
|
|
self.c = c
|
|
|
|
if s:
|
|
if self.c:
|
|
self.win.addstr( s, curses.color_pair( self.c ) )
|
|
else:
|
|
self.win.addstr( s )
|
|
|
|
if not p:
|
|
self.win.noutrefresh()
|
|
self.pwin.refresh()
|
|
else:
|
|
self.win.refresh()
|
|
|
|
def clear( self ):
|
|
"""Clear the status bar."""
|
|
self.win.clear()
|
|
|
|
def init_wins( scr, cols ):
|
|
"""Initialise the two windows (the main repl interface and the
|
|
little status bar at the bottom with some stuff in it)"""
|
|
#TODO: Document better what stuff is on the status bar.
|
|
|
|
h, w = gethw()
|
|
|
|
main_win = curses.newwin( h-1, w, 0, 0 )
|
|
main_win.scrollok( True )
|
|
main_win.keypad(1) # Thanks to Angus Gibson for pointing out
|
|
# this missing line which was causing problems that needed dirty
|
|
# hackery to fix. :)
|
|
|
|
statusbar = Statusbar( scr, main_win, ".:: <C-d> Exit <C-r> Rewind <F2> Save <F8> Pastebin ::.", (cols["g"]) *cols["y"] +1 )
|
|
|
|
return main_win, statusbar
|
|
|
|
def sigwinch( scr ):
|
|
global DO_RESIZE
|
|
DO_RESIZE = True
|
|
|
|
def gethw():
|
|
"""I found this code on a usenet post, and snipped out the bit I needed,
|
|
so thanks to whoever wrote that, sorry I forgot your name, I'm sure you're
|
|
a great guy.
|
|
|
|
It's unfortunately necessary (unless someone has any better ideas) in order
|
|
to allow curses and readline to work together. I looked at the code for
|
|
libreadline and noticed this comment:
|
|
|
|
/* This is the stuff that is hard for me. I never seem to write good
|
|
display routines in C. Let's see how I do this time. */
|
|
|
|
So I'm not going to ask any questions.
|
|
|
|
"""
|
|
h, w = struct.unpack(
|
|
"hhhh", fcntl.ioctl(sys.__stdout__, termios.TIOCGWINSZ, "\000"*8))[0:2]
|
|
return h, w
|
|
|
|
def idle( caller ):
|
|
"""This is called once every iteration through the getkey()
|
|
loop (currently in the Repl class, see the get_line() method).
|
|
The statusbar check needs to go here to take care of timed
|
|
messages and the resize handlers need to be here to make
|
|
sure it happens conveniently."""
|
|
|
|
global stdscr
|
|
|
|
caller.statusbar.check()
|
|
|
|
if DO_RESIZE:
|
|
do_resize( caller )
|
|
|
|
def do_resize( caller ):
|
|
"""This needs to hack around readline and curses not playing
|
|
nicely together. See also gethw() above."""
|
|
global DO_RESIZE
|
|
h, w = gethw()
|
|
if not h:
|
|
return # Hopefully this shouldn't happen. :)
|
|
|
|
curses.endwin()
|
|
os.environ["LINES"] = str( h )
|
|
os.environ["COLUMNS"] = str( w )
|
|
curses.doupdate()
|
|
DO_RESIZE = False
|
|
|
|
caller.resize()
|
|
caller.statusbar.resize()
|
|
# The list win resizes itself every time it appears so no need to do it here.
|
|
|
|
def loadrc():
|
|
"""Attempt to load the rc file and apply settings."""
|
|
|
|
c = ConfigParser.ConfigParser()
|
|
if not( c.read( os.path.expanduser('~/.bpythonrc') ) ):
|
|
return
|
|
|
|
if not c.has_section('Global'):
|
|
return
|
|
|
|
if c.has_option('Global', 'requiretab'):
|
|
if c.get('Global', 'requiretab') == 'no':
|
|
OPTS.requiretab = True
|
|
else:
|
|
OPTS.requiretab = False
|
|
|
|
def main( scr ):
|
|
"""main function for the curses convenience wrapper
|
|
|
|
Initialise the two main objects: the interpreter
|
|
and the repl. The repl does what a repl does and lots
|
|
of other cool stuff like syntax highlighting and stuff.
|
|
I've tried to keep it well factored but it needs some
|
|
tidying up, especially in separating the curses stuff
|
|
from the rest of the repl.
|
|
"""
|
|
global stdscr
|
|
global DO_RESIZE
|
|
DO_RESIZE = False
|
|
signal.signal( signal.SIGWINCH, lambda x,y: sigwinch(scr) )
|
|
|
|
loadrc()
|
|
stdscr = scr
|
|
curses.start_color()
|
|
curses.use_default_colors()
|
|
cols = make_colours()
|
|
|
|
scr.timeout( 300 )
|
|
|
|
main_win, statusbar = init_wins( scr, cols )
|
|
|
|
|
|
interpreter = Interpreter()
|
|
|
|
repl = Repl( main_win, interpreter, statusbar, idle )
|
|
repl._C = cols
|
|
|
|
sys.stdout = repl
|
|
sys.stderr = repl
|
|
|
|
|
|
repl.repl()
|
|
return repl.getstdout()
|
|
|
|
tb = None
|
|
try:
|
|
o = curses.wrapper( main )
|
|
except:
|
|
tb = traceback.format_exc()
|
|
finally: # I don't know why this is necessary; without it the wrapper doesn't always
|
|
# do its job.
|
|
stdscr.keypad(0)
|
|
curses.echo()
|
|
curses.nocbreak()
|
|
curses.endwin()
|
|
|
|
sys.stdout = sys.__stdout__
|
|
if tb:
|
|
print tb
|
|
sys.exit(1)
|
|
|
|
sys.stdout.write( o ) # Fake stdout data so everything's still visible after exiting
|
|
sys.stdout.flush()
|