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# Copyright (C) 2009, 2010 Roman Zimbelmann <romanz@lavabit.com>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import os
from collections import deque
from ranger.api import *
from ranger.core.shared import FileManagerAware
from ranger.ext.lazy_property import lazy_property
from ranger.ext.command_parser import LazyParser as parse
# A dummy that allows the generation of docstrings in ranger.defaults.commands
def alias(*_):
pass
class CommandContainer(object):
def __init__(self):
self.aliases = {}
self.commands = {}
def __getitem__(self, key):
return self.commands[key]
def alias(self, new, old):
self.aliases[new] = old
def load_commands_from_module(self, module):
for varname, var in vars(module).items():
try:
if issubclass(var, Command) and var != Command:
classdict = var.__mro__[0].__dict__
if 'name' in classdict and classdict['name']:
self.commands[var.name] = var
else:
self.commands[varname] = var
except TypeError:
pass
for new, old in self.aliases.items():
try:
self.commands[new] = self.commands[old]
except:
pass
def load_commands_from_object(self, obj, filtr):
for attribute_name in dir(obj):
if attribute_name[0] == '_' or attribute_name not in filtr:
continue
attribute = getattr(obj, attribute_name)
if hasattr(attribute, '__call__'):
cmd = type(attribute_name, (FunctionCommand, ), dict())
cmd._based_function = attribute
cmd._function_name = attribute.__name__
cmd._object_name = obj.__class__.__name__
self.commands[attribute_name] = cmd
def get_command(self, name, abbrev=True):
if abbrev:
lst = [cls for cmd, cls in self.commands.items() \
if cls.allow_abbrev and cmd.startswith(name) \
or cmd == name]
if len(lst) == 0:
raise KeyError
if len(lst) == 1:
return lst[0]
if self.commands[name] in lst:
return self.commands[name]
raise ValueError("Ambiguous command")
else:
try:
return self.commands[name]
except KeyError:
return None
def command_generator(self, start):
return (cmd + ' ' for cmd in self.commands if cmd.startswith(start))
class Command(FileManagerAware):
"""Abstract command class"""
name = None
allow_abbrev = True
resolve_macros = True
_shifted = 0
def __init__(self, line):
self.line = line
self.args = line.split()
def execute(self):
"""Override this"""
def tab(self):
"""Override this"""
def quick(self):
"""Override this"""
def cancel(self):
"""Override this"""
# Easy ways to get information
def arg(self, n):
"""Returns the nth space separated word"""
try:
return self.args[n]
except IndexError:
return ""
def rest(self, n):
"""Returns everything from and after arg(n)"""
got_space = False
word_count = 0
for i in range(len(self.line)):
if self.line[i] == " ":
if not got_space:
got_space = True
word_count += 1
elif got_space:
got_space = False
if word_count == n + self._shifted:
return self.line[i:]
return ""
def start(self, n):
"""Returns everything until (inclusively) arg(n)"""
return ' '.join(self.args[:n]) + " " # XXX
def shift(self):
del self.args[0]
self._shifted += 1
def tabinsert(self, word):
return ''.join([self._tabinsert_left, word, self._tabinsert_right])
@lazy_property
def _tabinsert_left(self):
try:
return self.line[:self.line[0:self.pos].rindex(' ') + 1]
except ValueError:
return ''
@lazy_property
def _tabinsert_right(self):
return self.line[self.pos:]
# COMPAT: this is still used in old commands.py configs
def _tab_only_directories(self):
from os.path import dirname, basename, expanduser, join, isdir
line = parse(self.line)
cwd = self.fm.env.cwd.path
try:
rel_dest = line.rest(1)
except IndexError:
rel_dest = ''
# expand the tilde into the user directory
if rel_dest.startswith('~'):
rel_dest = expanduser(rel_dest)
# define some shortcuts
abs_dest = join(cwd, rel_dest)
abs_dirname = dirname(abs_dest)
rel_basename = basename(rel_dest)
rel_dirname = dirname(rel_dest)
try:
# are we at the end of a directory?
if rel_dest.endswith('/') or rel_dest == '':
_, dirnames, _ = next(os.walk(abs_dest))
# are we in the middle of the filename?
else:
_, dirnames, _ = next(os.walk(abs_dirname))
dirnames = [dn for dn in dirnames \
if dn.startswith(rel_basename)]
except (OSError, StopIteration):
# os.walk found nothing
pass
else:
dirnames.sort()
# no results, return None
if len(dirnames) == 0:
return
# one result. since it must be a directory, append a slash.
if len(dirnames) == 1:
return line.start(1) + join(rel_dirname, dirnames[0]) + '/'
# more than one result. append no slash, so the user can
# manually type in the slash to advance into that directory
return (line.start(1) + join(rel_dirname, dirname) for dirname in dirnames)
def _tab_directory_content(self):
from os.path import dirname, basename, expanduser, join, isdir
line = parse(self.line)
cwd = self.fm.env.cwd.path
try:
rel_dest = line.rest(1)
except IndexError:
rel_dest = ''
# expand the tilde into the user directory
if rel_dest.startswith('~'):
rel_dest = expanduser(rel_dest)
# define some shortcuts
abs_dest = join(cwd, rel_dest)
abs_dirname = dirname(abs_dest)
rel_basename = basename(rel_dest)
rel_dirname = dirname(rel_dest)
try:
# are we at the end of a directory?
if rel_dest.endswith('/') or rel_dest == '':
_, dirnames, filenames = next(os.walk(abs_dest))
names = dirnames + filenames
# are we in the middle of the filename?
else:
_, dirnames, filenames = next(os.walk(abs_dirname))
names = [name for name in (dirnames + filenames) \
if name.startswith(rel_basename)]
except (OSError, StopIteration):
# os.walk found nothing
pass
else:
names.sort()
# no results, return None
if len(names) == 0:
return
# one result. since it must be a directory, append a slash.
if len(names) == 1:
return line.start(1) + join(rel_dirname, names[0]) + '/'
# more than one result. append no slash, so the user can
# manually type in the slash to advance into that directory
return (line.start(1) + join(rel_dirname, name) for name in names)
class FunctionCommand(Command):
_based_function = None
_object_name = ""
_function_name = "unknown"
def execute(self):
if not self._based_function:
return
if len(self.args) == 1:
return self._based_function()
args, keywords = list(), dict()
for arg in self.args[1:]:
equal_sign = arg.find("=")
value = arg if (equal_sign is -1) else arg[equal_sign + 1:]
try:
value = int(value)
except:
if value in ('True', 'False'):
value = (value == 'True')
else:
try:
value = float(value)
except:
pass
if equal_sign == -1:
args.append(value)
else:
keywords[arg[:equal_sign]] = value
try:
return self._based_function(*args, **keywords)
except TypeError:
self.fm.notify("Bad arguments for %s.%s: %s, %s" %
(self._object_name, self._function_name,
repr(args), repr(keywords)), bad=True)
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