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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/>.
"""
The Console widget implements a vim-like console for entering
commands, searching and executing files.
"""
import curses
import re
from collections import deque
from . import Widget
from ranger.ext.direction import Direction
from ranger.ext.widestring import uwid, WideString
from ranger.container import History
from ranger.container.history import HistoryEmptyException
import ranger
class Console(Widget):
visible = False
last_cursor_mode = None
history_search_pattern = None
prompt = ':'
copy = ''
tab_deque = None
original_line = None
history = None
override = None
allow_close = False
historypath = None
def __init__(self, win):
Widget.__init__(self, win)
self.clear()
self.history = History(self.settings.max_console_history_size)
# load history from files
if not ranger.arg.clean:
self.historypath = self.fm.confpath('history')
try:
f = open(self.historypath, 'r')
except:
pass
else:
for line in f:
self.history.add(line[:-1])
f.close()
def destroy(self):
# save history to files
if ranger.arg.clean or not self.settings.save_console_history:
return
if self.historypath:
try:
f = open(self.historypath, 'w')
except:
pass
else:
for entry in self.history:
f.write(entry + '\n')
f.close()
def draw(self):
self.win.erase()
self.addstr(0, 0, self.prompt)
line = WideString(self.line)
overflow = -self.wid + len(self.prompt) + len(line) + 1
if overflow > 0:
self.addstr(str(line[overflow:]))
else:
self.addstr(self.line)
def finalize(self):
try:
pos = uwid(self.line[0:self.pos]) + len(self.prompt)
self.fm.ui.win.move(self.y, self.x + min(self.wid-1, pos))
except:
pass
def open(self, string='', prompt=None, position=None):
if prompt is not None:
assert isinstance(prompt, str)
self.prompt = prompt
elif 'prompt' in self.__dict__:
del self.prompt
if self.last_cursor_mode is None:
try:
self.last_cursor_mode = curses.curs_set(1)
except:
pass
self.allow_close = False
self.tab_deque = None
self.focused = True
self.visible = True
self.unicode_buffer = ""
self.line = string
self.history_search_pattern = self.line
self.pos = len(string)
if position is not None:
self.pos = min(self.pos, position)
self.history.fast_forward()
self.history.add('')
return True
def close(self, trigger_cancel_function=True):
if trigger_cancel_function:
cmd = self._get_cmd(quiet=True)
if cmd:
try:
cmd.cancel()
except Exception as error:
self.fm.notify(error)
if self.last_cursor_mode is not None:
try:
curses.curs_set(self.last_cursor_mode)
except:
pass
self.last_cursor_mode = None
self.add_to_history()
self.tab_deque = None
self.clear()
self.__class__ = Console
self.focused = False
self.visible = False
if hasattr(self, 'on_close'):
self.on_close()
def clear(self):
self.pos = 0
self.line = ''
def press(self, key):
self.env.keymaps.use_keymap('console')
if not self.fm.ui.press(key):
self.type_key(key)
def type_key(self, key):
self.tab_deque = None
if isinstance(key, int):
try:
key = chr(key)
except ValueError:
return
if self.fm.py3:
self.unicode_buffer += key
try:
decoded = self.unicode_buffer.encode("latin-1").decode("utf-8")
except UnicodeDecodeError:
return
except UnicodeEncodeError:
return
else:
self.unicode_buffer = ""
if self.pos == len(self.line):
self.line += decoded
else:
pos = self.pos
self.line = self.line[:pos] + decoded + self.line[pos:]
self.pos += len(decoded)
else:
if self.pos == len(self.line):
self.line += key
else:
self.line = self.line[:self.pos] + key + self.line[self.pos:]
self.pos += len(key)
self.on_line_change()
def history_move(self, n):
try:
current = self.history.current()
except HistoryEmptyException:
pass
else:
if self.line != current and self.line != self.history.top():
self.history.modify(self.line)
if self.history_search_pattern:
self.history.search(self.history_search_pattern, n)
else:
self.history.move(n)
current = self.history.current()
if self.line != current:
self.line = self.history.current()
self.pos = len(self.line)
def add_to_history(self):
self.history.fast_forward()
self.history.modify(self.line, unique=True)
def move(self, **keywords):
direction = Direction(keywords)
if direction.horizontal():
# Ensure that the pointer is moved utf-char-wise
if self.fm.py3:
self.pos = direction.move(
direction=direction.right(),
minimum=0,
maximum=len(self.line) + 1,
current=self.pos)
else:
if self.fm.py3:
uc = list(self.line)
upos = len(self.line[:self.pos])
else:
uc = list(self.line.decode('utf-8', 'ignore'))
upos = len(self.line[:self.pos].decode('utf-8', 'ignore'))
newupos = direction.move(
direction=direction.right(),
minimum=0,
maximum=len(uc) + 1,
current=upos)
self.pos = len(''.join(uc[:newupos]).encode('utf-8', 'ignore'))
def delete_rest(self, direction):
self.tab_deque = None
if direction > 0:
self.copy = self.line[self.pos:]
self.line = self.line[:self.pos]
else:
self.copy = self.line[:self.pos]
self.line = self.line[self.pos:]
self.pos = 0
self.on_line_change()
def paste(self):
if self.pos == len(self.line):
self.line += self.copy
else:
self.line = self.line[:self.pos] + self.copy + self.line[self.pos:]
self.pos += len(self.copy)
self.on_line_change()
def delete_word(self, backward=True):
if self.line:
self.tab_deque = None
if backward:
right_part = self.line[self.pos:]
i = self.pos - 2
while i >= 0 and re.match(r'[\w\d]', self.line[i], re.U):
i -= 1
self.copy = self.line[i + 1:self.pos]
self.line = self.line[:i + 1] + right_part
self.pos = i + 1
else:
left_part = self.line[:self.pos]
i = self.pos + 1
while i < len(self.line) and re.match(r'[\w\d]', self.line[i], re.U):
i += 1
self.copy = self.line[self.pos:i]
if i >= len(self.line):
self.line = left_part
self.pos = len(self.line)
else:
self.line = left_part + self.line[i:]
self.pos = len(left_part)
self.on_line_change()
def delete(self, mod):
self.tab_deque = None
if mod == -1 and self.pos == 0:
if not self.line:
self.close(trigger_cancel_function=False)
return
# Delete utf-char-wise
if self.fm.py3:
left_part = self.line[:self.pos + mod]
self.pos = len(left_part)
self.line = left_part + self.line[self.pos + 1:]
else:
uc = list(self.line.decode('utf-8', 'ignore'))
upos = len(self.line[:self.pos].decode('utf-8', 'ignore')) + mod
left_part = ''.join(uc[:upos]).encode('utf-8', 'ignore')
self.pos = len(left_part)
self.line = left_part + ''.join(uc[upos+1:]).encode('utf-8', 'ignore')
self.on_line_change()
def execute(self, cmd=None):
self.allow_close = True
if cmd is None:
cmd = self._get_cmd()
if cmd:
try:
cmd.execute()
except Exception as error:
self.fm.notify(error)
if self.allow_close:
self.close(trigger_cancel_function=False)
def _get_cmd(self, quiet=False):
try:
command_class = self._get_cmd_class()
except KeyError:
if not quiet:
error = "Command not found: `%s'" % self.line.split()[0]
self.fm.notify(error, bad=True)
except:
return None
else:
return command_class(self.line)
def _get_cmd_class(self):
return self.fm.commands.get_command(self.line.split()[0])
def _get_tab(self):
if ' ' in self.line:
cmd = self._get_cmd()
if cmd:
return cmd.tab()
else:
return None
return self.fm.commands.command_generator(self.line)
def tab(self, n=1):
if self.tab_deque is None:
tab_result = self._get_tab()
if isinstance(tab_result, str):
self.line = tab_result
self.pos = len(tab_result)
self.on_line_change()
elif tab_result == None:
pass
elif hasattr(tab_result, '__iter__'):
self.tab_deque = deque(tab_result)
self.tab_deque.appendleft(self.line)
if self.tab_deque is not None:
self.tab_deque.rotate(-n)
self.line = self.tab_deque[0]
self.pos = len(self.line)
self.on_line_change()
def on_line_change(self):
self.history_search_pattern = self.line
try:
cls = self._get_cmd_class()
except (KeyError, ValueError, IndexError):
pass
else:
cmd = cls(self.line)
if cmd and cmd.quick():
self.execute(cmd)
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