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from os.path import abspath, normpath, join, expanduser, isdir
import os
from ranger.fsobject.directory import Directory, NoDirectoryGiven
from ranger.container import KeyBuffer, History
from ranger.shared import SettingsAware
import curses
class Environment(SettingsAware):
"""A collection of data which is relevant for more than
one class.
"""
pwd = None # current directory
cf = None # current file
copy = None
cut = None
termsize = None
history = None
directories = None
last_search = None
pathway = None
path = None
keybuffer = None
def __init__(self, path):
self.path = abspath(expanduser(path))
self.pathway = ()
self.directories = {}
self.keybuffer = KeyBuffer()
self.copy = set()
self.history = History(self.settings.max_history_size)
from ranger.shared import EnvironmentAware
EnvironmentAware.env = self
def key_append(self, key):
"""Append a key to the keybuffer"""
# special keys:
if key == curses.KEY_RESIZE:
self.keybuffer.clear()
self.keybuffer.append(key)
def key_clear(self):
"""Clear the keybuffer"""
self.keybuffer.clear()
def at_level(self, level):
"""Returns the FileSystemObject at the given level.
level 1 => preview
level 0 => current file/directory
level <0 => parent directories"""
if level <= 0:
try:
return self.pathway[level - 1]
except IndexError:
return None
else:
try:
return self.directories[self.cf.path]
except AttributeError:
return None
except KeyError:
return self.cf
def garbage_collect(self):
"""Delete unused directory objects"""
from ranger.fsobject.fsobject import FileSystemObject
for key in tuple(self.directories.keys()):
value = self.directories[key]
if isinstance(value, FileSystemObject):
if value.is_older_than(1200):
del self.directories[key]
def get_selection(self):
if self.pwd:
return self.pwd.get_selection()
return set()
def get_directory(self, path):
"""Get the directory object at the given path"""
path = abspath(path)
try:
return self.directories[path]
except KeyError:
obj = Directory(path)
self.directories[path] = obj
return obj
def assign_correct_cursor_positions(self):
"""Assign correct cursor positions for subdirectories"""
last_path = None
for path in reversed(self.pathway):
if last_path is None:
last_path = path
continue
path.move_to_obj(last_path)
last_path = path
def history_go(self, relative):
"""Move relative in history"""
if self.history:
# self.enter_dir(self.history.move(relative))
self.history.move(relative).go()
def enter_dir(self, path, history = True):
"""Enter given path"""
if path is None: return
path = str(path)
# get the absolute path
path = normpath(join(self.path, expanduser(path)))
if not isdir(path):
return
try:
new_pwd = self.get_directory(path)
except NoDirectoryGiven:
return False
self.path = path
self.pwd = new_pwd
os.chdir(path)
self.pwd.load_content_if_outdated()
# build the pathway, a tuple of directory objects which lie
# on the path to the current directory.
if path == '/':
self.pathway = (self.get_directory('/'), )
else:
pathway = []
currentpath = '/'
for dir in path.split('/'):
currentpath = join(currentpath, dir)
pathway.append(self.get_directory(currentpath))
self.pathway = tuple(pathway)
self.assign_correct_cursor_positions()
# set the current file.
self.pwd.directories_first = self.settings.directories_first
self.pwd.sort_if_outdated()
self.cf = self.pwd.pointed_obj
if history:
self.history.add(new_pwd)
return True
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