|
|
# -*- coding: utf-8 -*-
|
|
|
"""Classes for handling input/output prompts.
|
|
|
|
|
|
Authors:
|
|
|
|
|
|
* Fernando Perez
|
|
|
* Brian Granger
|
|
|
"""
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Copyright (C) 2008-2011 The IPython Development Team
|
|
|
# Copyright (C) 2001-2007 Fernando Perez <fperez@colorado.edu>
|
|
|
#
|
|
|
# Distributed under the terms of the BSD License. The full license is in
|
|
|
# the file COPYING, distributed as part of this software.
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Imports
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
import os
|
|
|
import re
|
|
|
import socket
|
|
|
import sys
|
|
|
import time
|
|
|
|
|
|
from IPython.config.configurable import Configurable
|
|
|
from IPython.core import release
|
|
|
from IPython.utils import coloransi
|
|
|
from IPython.utils.traitlets import (Unicode, Instance, Dict, Bool, Int)
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Color schemes for prompts
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
InputColors = coloransi.InputTermColors # just a shorthand
|
|
|
Colors = coloransi.TermColors # just a shorthand
|
|
|
|
|
|
color_lists = dict(normal=Colors(), inp=InputColors(), nocolor=coloransi.NoColors())
|
|
|
|
|
|
PColNoColors = coloransi.ColorScheme(
|
|
|
'NoColor',
|
|
|
in_prompt = InputColors.NoColor, # Input prompt
|
|
|
in_number = InputColors.NoColor, # Input prompt number
|
|
|
in_prompt2 = InputColors.NoColor, # Continuation prompt
|
|
|
in_normal = InputColors.NoColor, # color off (usu. Colors.Normal)
|
|
|
|
|
|
out_prompt = Colors.NoColor, # Output prompt
|
|
|
out_number = Colors.NoColor, # Output prompt number
|
|
|
|
|
|
normal = Colors.NoColor # color off (usu. Colors.Normal)
|
|
|
)
|
|
|
|
|
|
# make some schemes as instances so we can copy them for modification easily:
|
|
|
PColLinux = coloransi.ColorScheme(
|
|
|
'Linux',
|
|
|
in_prompt = InputColors.Green,
|
|
|
in_number = InputColors.LightGreen,
|
|
|
in_prompt2 = InputColors.Green,
|
|
|
in_normal = InputColors.Normal, # color off (usu. Colors.Normal)
|
|
|
|
|
|
out_prompt = Colors.Red,
|
|
|
out_number = Colors.LightRed,
|
|
|
|
|
|
normal = Colors.Normal
|
|
|
)
|
|
|
|
|
|
# Slightly modified Linux for light backgrounds
|
|
|
PColLightBG = PColLinux.copy('LightBG')
|
|
|
|
|
|
PColLightBG.colors.update(
|
|
|
in_prompt = InputColors.Blue,
|
|
|
in_number = InputColors.LightBlue,
|
|
|
in_prompt2 = InputColors.Blue
|
|
|
)
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Utilities
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
class LazyEvaluate(object):
|
|
|
"""This is used for formatting strings with values that need to be updated
|
|
|
at that time, such as the current time or line number."""
|
|
|
def __init__(self, func, *args, **kwargs):
|
|
|
self.func = func
|
|
|
self.args = args
|
|
|
self.kwargs = kwargs
|
|
|
|
|
|
def __call__(self, **kwargs):
|
|
|
self.kwargs.update(kwargs)
|
|
|
return self.func(*self.args, **self.kwargs)
|
|
|
|
|
|
def __str__(self):
|
|
|
return str(self())
|
|
|
|
|
|
def multiple_replace(dict, text):
|
|
|
""" Replace in 'text' all occurences of any key in the given
|
|
|
dictionary by its corresponding value. Returns the new string."""
|
|
|
|
|
|
# Function by Xavier Defrang, originally found at:
|
|
|
# http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/81330
|
|
|
|
|
|
# Create a regular expression from the dictionary keys
|
|
|
regex = re.compile("(%s)" % "|".join(map(re.escape, dict.keys())))
|
|
|
# For each match, look-up corresponding value in dictionary
|
|
|
return regex.sub(lambda mo: dict[mo.string[mo.start():mo.end()]], text)
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Special characters that can be used in prompt templates, mainly bash-like
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
# If $HOME isn't defined (Windows), make it an absurd string so that it can
|
|
|
# never be expanded out into '~'. Basically anything which can never be a
|
|
|
# reasonable directory name will do, we just want the $HOME -> '~' operation
|
|
|
# to become a no-op. We pre-compute $HOME here so it's not done on every
|
|
|
# prompt call.
|
|
|
|
|
|
# FIXME:
|
|
|
|
|
|
# - This should be turned into a class which does proper namespace management,
|
|
|
# since the prompt specials need to be evaluated in a certain namespace.
|
|
|
# Currently it's just globals, which need to be managed manually by code
|
|
|
# below.
|
|
|
|
|
|
# - I also need to split up the color schemes from the prompt specials
|
|
|
# somehow. I don't have a clean design for that quite yet.
|
|
|
|
|
|
HOME = os.environ.get("HOME","//////:::::ZZZZZ,,,~~~")
|
|
|
|
|
|
# We precompute a few more strings here for the prompt_specials, which are
|
|
|
# fixed once ipython starts. This reduces the runtime overhead of computing
|
|
|
# prompt strings.
|
|
|
USER = os.environ.get("USER")
|
|
|
HOSTNAME = socket.gethostname()
|
|
|
HOSTNAME_SHORT = HOSTNAME.split(".")[0]
|
|
|
ROOT_SYMBOL = "#" if (os.name=='nt' or os.getuid()==0) else "$"
|
|
|
|
|
|
prompt_abbreviations = {
|
|
|
# Prompt/history count
|
|
|
'%n' : '{color.number}' '{count}' '{color.prompt}',
|
|
|
r'\#': '{color.number}' '{count}' '{color.prompt}',
|
|
|
# Just the prompt counter number, WITHOUT any coloring wrappers, so users
|
|
|
# can get numbers displayed in whatever color they want.
|
|
|
r'\N': '{count}',
|
|
|
|
|
|
# Prompt/history count, with the actual digits replaced by dots. Used
|
|
|
# mainly in continuation prompts (prompt_in2)
|
|
|
r'\D': '{dots}',
|
|
|
|
|
|
# Current time
|
|
|
r'\t' : '{time}',
|
|
|
# Current working directory
|
|
|
r'\w': '{cwd}',
|
|
|
# Basename of current working directory.
|
|
|
# (use os.sep to make this portable across OSes)
|
|
|
r'\W' : '{cwd_last}',
|
|
|
# These X<N> are an extension to the normal bash prompts. They return
|
|
|
# N terms of the path, after replacing $HOME with '~'
|
|
|
r'\X0': '{cwd_x[0])}',
|
|
|
r'\X1': '{cwd_x[1])}',
|
|
|
r'\X2': '{cwd_x[2])}',
|
|
|
r'\X3': '{cwd_x[3])}',
|
|
|
r'\X4': '{cwd_x[4])}',
|
|
|
r'\X5': '{cwd_x[5])}',
|
|
|
# Y<N> are similar to X<N>, but they show '~' if it's the directory
|
|
|
# N+1 in the list. Somewhat like %cN in tcsh.
|
|
|
r'\Y0': '{cwd_y[0])}',
|
|
|
r'\Y1': '{cwd_y[1])}',
|
|
|
r'\Y2': '{cwd_y[2])}',
|
|
|
r'\Y3': '{cwd_y[3])}',
|
|
|
r'\Y4': '{cwd_y[4])}',
|
|
|
r'\Y5': '{cwd_y[5])}',
|
|
|
# Hostname up to first .
|
|
|
r'\h': HOSTNAME_SHORT,
|
|
|
# Full hostname
|
|
|
r'\H': HOSTNAME,
|
|
|
# Username of current user
|
|
|
r'\u': USER,
|
|
|
# Escaped '\'
|
|
|
'\\\\': '\\',
|
|
|
# Newline
|
|
|
r'\n': '\n',
|
|
|
# Carriage return
|
|
|
r'\r': '\r',
|
|
|
# Release version
|
|
|
r'\v': release.version,
|
|
|
# Root symbol ($ or #)
|
|
|
r'\$': ROOT_SYMBOL,
|
|
|
}
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# More utilities
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
def str_safe(arg):
|
|
|
"""Convert to a string, without ever raising an exception.
|
|
|
|
|
|
If str(arg) fails, <ERROR: ... > is returned, where ... is the exception
|
|
|
error message."""
|
|
|
|
|
|
try:
|
|
|
out = str(arg)
|
|
|
except UnicodeError:
|
|
|
try:
|
|
|
out = arg.encode('utf_8','replace')
|
|
|
except Exception,msg:
|
|
|
# let's keep this little duplication here, so that the most common
|
|
|
# case doesn't suffer from a double try wrapping.
|
|
|
out = '<ERROR: %s>' % msg
|
|
|
except Exception,msg:
|
|
|
out = '<ERROR: %s>' % msg
|
|
|
#raise # dbg
|
|
|
return out
|
|
|
|
|
|
def cwd_filt(self, depth):
|
|
|
"""Return the last depth elements of the current working directory.
|
|
|
|
|
|
$HOME is always replaced with '~'.
|
|
|
If depth==0, the full path is returned."""
|
|
|
|
|
|
cwd = os.getcwd().replace(HOME,"~")
|
|
|
out = os.sep.join(cwd.split(os.sep)[-depth:])
|
|
|
return out or os.sep
|
|
|
|
|
|
def cwd_filt2(self, depth):
|
|
|
"""Return the last depth elements of the current working directory.
|
|
|
|
|
|
$HOME is always replaced with '~'.
|
|
|
If depth==0, the full path is returned."""
|
|
|
|
|
|
full_cwd = os.getcwd()
|
|
|
cwd = full_cwd.replace(HOME,"~").split(os.sep)
|
|
|
if '~' in cwd and len(cwd) == depth+1:
|
|
|
depth += 1
|
|
|
drivepart = ''
|
|
|
if sys.platform == 'win32' and len(cwd) > depth:
|
|
|
drivepart = os.path.splitdrive(full_cwd)[0]
|
|
|
out = drivepart + '/'.join(cwd[-depth:])
|
|
|
|
|
|
return out or os.sep
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Prompt classes
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
lazily_evaluate = {'time': LazyEvaluate(time.strftime, "%H:%M:%S"),
|
|
|
'cwd': LazyEvaluate(os.getcwd),
|
|
|
'cwd_last': LazyEvaluate(lambda: os.getcwd().split(os.sep)[-1]),
|
|
|
'cwd_x': [LazyEvaluate(lambda: os.getcwd().replace("%s","~"))] +\
|
|
|
[LazyEvaluate(cwd_filt, x) for x in range(1,6)],
|
|
|
'cwd_y': [LazyEvaluate(cwd_filt2, x) for x in range(6)]
|
|
|
}
|
|
|
|
|
|
|
|
|
class PromptManager(Configurable):
|
|
|
shell = Instance('IPython.core.interactiveshell.InteractiveShellABC')
|
|
|
|
|
|
color_scheme_table = Instance(coloransi.ColorSchemeTable)
|
|
|
color_scheme = Unicode('Linux')
|
|
|
def _color_scheme_changed(self, name, new_value):
|
|
|
self.color_scheme_table.set_active_scheme(new_value)
|
|
|
for pname in ['in', 'in2', 'out', 'rewrite']:
|
|
|
# We need to recalculate the number of invisible characters
|
|
|
self.update_prompt(pname)
|
|
|
|
|
|
# These fields can be referenced in prompt templates, and are evaluated
|
|
|
# when the prompt is generated - for things like timestamps. They are only
|
|
|
# evaluated if a prompt uses them.
|
|
|
lazy_evaluate_fields = Dict()
|
|
|
def _lazy_evaluate_fields_default(self): return lazily_evaluate.copy()
|
|
|
|
|
|
in_template = Unicode('In [\\#]: ', config=True)
|
|
|
in2_template = Unicode(' .\\D.: ', config=True)
|
|
|
out_template = Unicode('Out[\\#]: ', config=True)
|
|
|
rewrite_template = Unicode("------> ", config=True)
|
|
|
|
|
|
# Justify prompts by default?
|
|
|
justify = Bool(True)
|
|
|
|
|
|
# We actually store the expanded templates here:
|
|
|
templates = Dict()
|
|
|
|
|
|
# The number of characters in the last prompt rendered, not including
|
|
|
# colour characters.
|
|
|
width = Int()
|
|
|
|
|
|
# The number of characters in each prompt which don't contribute to width
|
|
|
invisible_chars = Dict()
|
|
|
def _invisible_chars_default(self):
|
|
|
return {'in': 0, 'in2': 0, 'out': 0, 'rewrite': 0}
|
|
|
|
|
|
def __init__(self, shell, config=None):
|
|
|
super(PromptManager, self).__init__(shell=shell, config=config)
|
|
|
|
|
|
# Prepare colour scheme table
|
|
|
self.color_scheme_table = coloransi.ColorSchemeTable([PColNoColors,
|
|
|
PColLinux, PColLightBG], self.color_scheme)
|
|
|
|
|
|
# Prepare templates
|
|
|
self.update_prompt('in', self.in_template)
|
|
|
self.update_prompt('in2', self.in2_template)
|
|
|
self.update_prompt('out', self.out_template)
|
|
|
self.update_prompt('rewrite', self.rewrite_template)
|
|
|
self.on_trait_change(self._update_prompt_trait, ['in_template',
|
|
|
'in2_template', 'out_template', 'rewrite_template'])
|
|
|
|
|
|
def update_prompt(self, name, new_template=None):
|
|
|
if new_template is not None:
|
|
|
self.templates[name] = multiple_replace(prompt_abbreviations, new_template)
|
|
|
invis_chars = len(self.render(name, color=True, just=False)) - \
|
|
|
len(self.render(name, color=False, just=False))
|
|
|
self.invisible_chars[name] = invis_chars
|
|
|
|
|
|
def _update_prompt_trait(self, traitname, new_template):
|
|
|
name = traitname[:-9] # Cut off '_template'
|
|
|
self.update_prompt(name, new_template)
|
|
|
|
|
|
def render(self, name, color=True, just=None, **kwargs):
|
|
|
"""
|
|
|
Render the selected prompt.
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
name : str
|
|
|
Which prompt to render. One of 'in', 'in2', 'out', 'rewrite'
|
|
|
color : bool
|
|
|
If True (default), include ANSI escape sequences for a coloured prompt.
|
|
|
just : bool
|
|
|
If True, justify the prompt to the width of the last prompt. The
|
|
|
default is stored in self.justify.
|
|
|
**kwargs :
|
|
|
Additional arguments will be passed to the string formatting operation,
|
|
|
so they can override the values that would otherwise fill in the
|
|
|
template.
|
|
|
|
|
|
Returns
|
|
|
-------
|
|
|
A string containing the rendered prompt.
|
|
|
"""
|
|
|
if color:
|
|
|
scheme = self.color_scheme_table.active_colors
|
|
|
if name=='out':
|
|
|
colors = color_lists['normal']
|
|
|
colors.number, colors.prompt, colors.normal = \
|
|
|
scheme.out_number, scheme.out_prompt, scheme.normal
|
|
|
else:
|
|
|
colors = color_lists['inp']
|
|
|
colors.number, colors.prompt, colors.normal = \
|
|
|
scheme.in_number, scheme.in_prompt, scheme.in_normal
|
|
|
if name=='in2':
|
|
|
colors.prompt = scheme.in_prompt2
|
|
|
else:
|
|
|
# No color
|
|
|
colors = color_lists['nocolor']
|
|
|
colors.number, colors.prompt, colors.normal = '', '', ''
|
|
|
|
|
|
count = self.shell.execution_count # Shorthand
|
|
|
# Build the dictionary to be passed to string formatting
|
|
|
fmtargs = dict(color=colors, count=count,
|
|
|
dots="."*len(str(count)) )
|
|
|
fmtargs.update(self.lazy_evaluate_fields)
|
|
|
fmtargs.update(kwargs)
|
|
|
|
|
|
# Prepare the prompt
|
|
|
prompt = colors.prompt + self.templates[name] + colors.normal
|
|
|
|
|
|
# Fill in required fields
|
|
|
res = prompt.format(**fmtargs)
|
|
|
|
|
|
# Handle justification of prompt
|
|
|
invis_chars = self.invisible_chars[name] if color else 0
|
|
|
just = self.justify if (just is None) else just
|
|
|
if just:
|
|
|
res = res.rjust(self.width + invis_chars)
|
|
|
self.width = len(res) - invis_chars
|
|
|
return res
|
|
|
|
|
|
|
