/usr/share/pyshared/ranger/gui/ui.py is in ranger 1.5.4-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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#
# 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
import sys
import curses
import _curses
from .displayable import DisplayableContainer
from .mouse_event import MouseEvent
from ranger.ext.keybinding_parser import ALT_KEY
TERMINALS_WITH_TITLE = ("xterm", "xterm-256color", "rxvt",
"rxvt-256color", "rxvt-unicode", "rxvt-unicode-256color",
"aterm", "Eterm", "screen", "screen-256color")
MOUSEMASK = curses.ALL_MOUSE_EVENTS | curses.REPORT_MOUSE_POSITION
_ASCII = ''.join(chr(c) for c in range(32, 127))
def ascii_only(string):
return ''.join(c if c in _ASCII else '?' for c in string)
def _setup_mouse(signal):
if signal['value']:
curses.mousemask(MOUSEMASK)
curses.mouseinterval(0)
## this line solves this problem:
## If an action, following a mouse click, includes the
## suspension and re-initializion of the ui (e.g. running a
## file by clicking on its preview) and the next key is another
## mouse click, the bstate of this mouse event will be invalid.
## (atm, invalid bstates are recognized as scroll-down)
curses.ungetmouse(0,0,0,0,0)
else:
curses.mousemask(0)
# TODO: progress bar
# TODO: branch view
class UI(DisplayableContainer):
is_set_up = False
load_mode = False
is_on = False
def __init__(self, env=None, fm=None):
self._draw_title = os.environ["TERM"] in TERMINALS_WITH_TITLE
os.environ['ESCDELAY'] = '25' # don't know a cleaner way
if env is not None:
self.env = env
if fm is not None:
self.fm = fm
try:
self.win = curses.initscr()
except _curses.error as e:
if e.args[0] == "setupterm: could not find terminal":
os.environ['TERM'] = 'linux'
self.win = curses.initscr()
self.env.keymaps.use_keymap('browser')
DisplayableContainer.__init__(self, None)
def initialize(self):
"""initialize curses, then call setup (at the first time) and resize."""
self.win.leaveok(0)
self.win.keypad(1)
self.load_mode = False
curses.cbreak()
curses.noecho()
curses.halfdelay(20)
try:
curses.curs_set(int(bool(self.settings.show_cursor)))
except:
pass
curses.start_color()
curses.use_default_colors()
self.settings.signal_bind('setopt.mouse_enabled', _setup_mouse)
_setup_mouse(dict(value=self.settings.mouse_enabled))
if not self.is_set_up:
self.is_set_up = True
self.setup()
self.win.addstr("loading...")
self.win.refresh()
self.update_size()
self.is_on = True
def suspend(self):
"""Turn off curses"""
self.win.keypad(0)
curses.nocbreak()
curses.echo()
try:
curses.curs_set(1)
except:
pass
if self.settings.mouse_enabled:
_setup_mouse(dict(value=False))
curses.endwin()
self.is_on = False
def set_load_mode(self, boolean):
boolean = bool(boolean)
if boolean != self.load_mode:
self.load_mode = boolean
if boolean:
# don't wait for key presses in the load mode
curses.cbreak()
self.win.nodelay(1)
else:
self.win.nodelay(0)
curses.halfdelay(20)
def destroy(self):
"""Destroy all widgets and turn off curses"""
self.suspend()
DisplayableContainer.destroy(self)
def handle_mouse(self):
"""Handles mouse input"""
try:
event = MouseEvent(curses.getmouse())
except _curses.error:
return
if not self.console.visible:
DisplayableContainer.click(self, event)
def handle_key(self, key):
"""Handles key input"""
if hasattr(self, 'hint'):
self.hint()
if key < 0:
self.env.keybuffer.clear()
elif not DisplayableContainer.press(self, key):
self.env.keymaps.use_keymap('browser')
self.press(key)
def press(self, key):
keybuffer = self.env.keybuffer
self.status.clear_message()
keybuffer.add(key)
self.fm.hide_bookmarks()
self.browser.draw_hints = not keybuffer.finished_parsing \
and keybuffer.finished_parsing_quantifier
if keybuffer.result is not None:
try:
self.fm.execute_console(keybuffer.result,
wildcards=keybuffer.wildcards,
quantifier=keybuffer.quantifier)
finally:
if keybuffer.finished_parsing:
keybuffer.clear()
elif keybuffer.finished_parsing:
keybuffer.clear()
return False
return True
def handle_keys(self, *keys):
for key in keys:
self.handle_key(key)
def handle_input(self):
key = self.win.getch()
if key is 27 or key >= 128 and key < 256:
# Handle special keys like ALT+X or unicode here:
keys = [key]
previous_load_mode = self.load_mode
self.set_load_mode(True)
for n in range(4):
getkey = self.win.getch()
if getkey is not -1:
keys.append(getkey)
if len(keys) == 1:
keys.append(-1)
elif keys[0] == 27:
keys[0] = ALT_KEY
if self.settings.xterm_alt_key:
if len(keys) == 2 and keys[1] in range(127, 256):
if keys[0] == 195:
keys = [ALT_KEY, keys[1] - 64]
elif keys[0] == 194:
keys = [ALT_KEY, keys[1] - 128]
self.handle_keys(*keys)
self.set_load_mode(previous_load_mode)
if self.settings.flushinput and not self.console.visible:
curses.flushinp()
else:
# Handle simple key presses, CTRL+X, etc here:
if key > 0:
if self.settings.flushinput and not self.console.visible:
curses.flushinp()
if key == curses.KEY_MOUSE:
self.handle_mouse()
elif key == curses.KEY_RESIZE:
self.update_size()
else:
if not self.fm.input_is_blocked():
self.handle_key(key)
def setup(self):
"""Build up the UI by initializing widgets."""
from ranger.gui.widgets.browserview import BrowserView
from ranger.gui.widgets.titlebar import TitleBar
from ranger.gui.widgets.console import Console
from ranger.gui.widgets.statusbar import StatusBar
from ranger.gui.widgets.taskview import TaskView
from ranger.gui.widgets.pager import Pager
# Create a title bar
self.titlebar = TitleBar(self.win)
self.add_child(self.titlebar)
# Create the browser view
self.browser = BrowserView(self.win, self.settings.column_ratios)
self.settings.signal_bind('setopt.column_ratios',
self.browser.change_ratios)
self.add_child(self.browser)
# Create the process manager
self.taskview = TaskView(self.win)
self.taskview.visible = False
self.add_child(self.taskview)
# Create the status bar
self.status = StatusBar(self.win, self.browser.main_column)
self.add_child(self.status)
# Create the console
self.console = Console(self.win)
self.add_child(self.console)
self.console.visible = False
# Create the pager
self.pager = Pager(self.win)
self.pager.visible = False
self.add_child(self.pager)
def redraw(self):
"""Redraw all widgets"""
self.poke()
self.draw()
self.finalize()
def redraw_window(self):
"""Redraw the window. This only calls self.win.redrawwin()."""
self.win.erase()
self.win.redrawwin()
self.win.refresh()
self.win.redrawwin()
self.need_redraw = True
def update_size(self):
"""resize all widgets"""
self.env.termsize = self.win.getmaxyx()
y, x = self.env.termsize
self.browser.resize(1, 0, y - 2, x)
self.taskview.resize(1, 0, y - 2, x)
self.pager.resize(1, 0, y - 2, x)
self.titlebar.resize(0, 0, 1, x)
self.status.resize(y - 1, 0, 1, x)
self.console.resize(y - 1, 0, 1, x)
def draw(self):
"""Draw all objects in the container"""
self.win.touchwin()
DisplayableContainer.draw(self)
if self._draw_title and self.settings.update_title:
cwd = self.fm.env.cwd.path
if cwd.startswith(self.env.home_path):
cwd = '~' + cwd[len(self.env.home_path):]
if self.settings.shorten_title:
split = cwd.rsplit(os.sep, self.settings.shorten_title)
if os.sep in split[0]:
cwd = os.sep.join(split[1:])
try:
fixed_cwd = cwd.encode('utf-8', 'surrogateescape'). \
decode('utf-8', 'replace')
sys.stdout.write("\033]2;ranger:" + fixed_cwd + "\007")
sys.stdout.flush()
except:
pass
self.win.refresh()
def finalize(self):
"""Finalize every object in container and refresh the window"""
DisplayableContainer.finalize(self)
self.win.refresh()
def close_pager(self):
if self.console.visible:
self.console.focused = True
self.pager.close()
self.pager.visible = False
self.pager.focused = False
self.browser.visible = True
def open_pager(self):
if self.console.focused:
self.console.focused = False
self.pager.open()
self.pager.visible = True
self.pager.focused = True
self.browser.visible = False
return self.pager
def open_embedded_pager(self):
self.browser.open_pager()
return self.browser.pager
def close_embedded_pager(self):
self.browser.close_pager()
def open_console(self, string='', prompt=None, position=None):
if self.console.open(string, prompt=prompt, position=position):
self.status.msg = None
self.console.on_close = self.close_console
self.console.visible = True
self.status.visible = False
def close_console(self):
self.console.visible = False
self.status.visible = True
self.close_pager()
def open_taskview(self):
self.pager.close()
self.pager.visible = False
self.pager.focused = False
self.console.visible = False
self.browser.visible = False
self.taskview.visible = True
self.taskview.focused = True
def redraw_main_column(self):
self.browser.main_column.need_redraw = True
def close_taskview(self):
self.taskview.visible = False
self.browser.visible = True
self.taskview.focused = False
def throbber(self, string='.', remove=False):
if remove:
self.titlebar.throbber = type(self.titlebar).throbber
else:
self.titlebar.throbber = string
def hint(self, text=None):
self.status.hint = text
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