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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
import socket
import sys
import curses
import _curses
from .displayable import DisplayableContainer
from .mouse_event import MouseEvent
from ranger.container import CommandList
TERMINALS_WITH_TITLE = ("xterm", "xterm-256color", "rxvt",
"rxvt-256color", "rxvt-unicode", "aterm", "Eterm",
"screen", "screen-256color")
class UI(DisplayableContainer):
is_set_up = False
mousemask = curses.ALL_MOUSE_EVENTS | curses.REPORT_MOUSE_POSITION
load_mode = False
def __init__(self, commandlist=None, 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
if commandlist is None:
self.commandlist = CommandList()
self.settings.keys.initialize_commands(self.commandlist)
else:
self.commandlist = commandlist
self.win = curses.initscr()
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()
curses.mousemask(self.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)
if not self.is_set_up:
self.is_set_up = True
self.setup()
self.update_size()
def suspend(self):
"""Turn off curses"""
# from ranger import log
# log("suspending ui!")
self.win.keypad(0)
curses.nocbreak()
curses.echo()
try:
curses.curs_set(1)
except:
pass
curses.mousemask(0)
curses.endwin()
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"""
DisplayableContainer.destroy(self)
self.suspend()
def handle_mouse(self):
"""Handles mouse input"""
try:
event = MouseEvent(curses.getmouse())
except _curses.error:
return
# from ranger import log
# log('{0:0>28b} ({0})'.format(event.bstate))
# log('y: {0} x: {1}'.format(event.y, event.x))
DisplayableContainer.click(self, event)
def handle_key(self, key):
"""Handles key input"""
if hasattr(self, 'hint'):
self.hint()
self.env.key_append(key)
if DisplayableContainer.press(self, key):
return
try:
tup = self.env.keybuffer.tuple_without_numbers()
if tup:
cmd = self.commandlist[tup]
else:
return
except KeyError:
self.env.key_clear()
return
self.env.cmd = cmd
if hasattr(cmd, 'show_obj') and hasattr(cmd.show_obj, 'hint'):
if hasattr(self, 'hint'):
self.hint(cmd.show_obj.hint)
elif hasattr(cmd, 'execute'):
try:
cmd.execute_wrap(self)
except Exception as error:
self.fm.notify(error)
self.env.key_clear()
def get_next_key(self):
"""Waits for key input and returns the pressed key"""
key = self.win.getch()
if key is not -1:
if self.settings.flushinput:
curses.flushinp()
return key
def setup(self):
"""
Called after an initialize() call.
Override this!
"""
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):
"""
Update self.env.termsize.
Extend this method to resize all widgets!
"""
self.env.termsize = self.win.getmaxyx()
def draw(self):
"""Erase the window, then 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:])
sys.stdout.write("\033]2;ranger:" + cwd + "\007")
self.win.refresh()
def finalize(self):
"""Finalize every object in container and refresh the window"""
DisplayableContainer.finalize(self)
self.win.refresh()
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