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# Copyright (c) 2009, 2010 hut <hut@lavabit.com>
#
# Permission to use, copy, modify, and/or distribute this software for any
# purpose with or without fee is hereby granted, provided that the above
# copyright notice and this permission notice appear in all copies.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
import curses
import _curses
from .displayable import DisplayableContainer
from .mouse_event import MouseEvent
from ranger.container import CommandList
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):
import os
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)
curses.curs_set(0)
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()
curses.curs_set(1)
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
if hasattr(cmd, 'text'):
if hasattr(self, 'hint'):
self.hint(cmd.text)
elif hasattr(cmd, 'execute'):
cmd.execute_wrap(self)
self.env.key_clear()
def get_next_key(self):
"""Waits for key input and returns the pressed key"""
key = self.win.getch()
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)
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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