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# This file is part of ranger, the console file manager.
# License: GNU GPL version 3, see the file "AUTHORS" for details.
import os
import sys
import curses
import _curses
import threading
from .displayable import DisplayableContainer
from .mouse_event import MouseEvent
from ranger.ext.keybinding_parser import KeyBuffer, KeyMaps, ALT_KEY
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 a mouse click triggers an action that disables curses and
## starts curses again, (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, so this avoids an errorneous scroll-down action)
curses.ungetmouse(0,0,0,0,0)
else:
curses.mousemask(0)
class UI(DisplayableContainer):
is_set_up = False
load_mode = False
is_on = False
termsize = None
def __init__(self, env=None, fm=None):
self.keybuffer = KeyBuffer()
self.keymaps = KeyMaps(self.keybuffer)
self.redrawlock = threading.Event()
self.redrawlock.set()
if fm is not None:
self.fm = fm
def setup_curses(self):
os.environ['ESCDELAY'] = '25' # don't know a cleaner way
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.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()
try:
curses.use_default_colors()
except:
pass
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._draw_title = curses.tigetflag('hs') # has_status_line
self.update_size()
self.is_on = True
if self.settings.update_tmux_title:
sys.stdout.write("\033kranger\033\\")
sys.stdout.flush()
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)
# Sanitize halfdelay setting
halfdelay = min(255, max(1, self.settings.idle_delay // 100))
curses.halfdelay(halfdelay)
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
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.keybuffer.clear()
elif not DisplayableContainer.press(self, key):
self.keymaps.use_keymap('browser')
self.press(key)
def press(self, key):
keybuffer = self.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
from ranger.ext.vcs import VcsThread
# 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)
# Create VCS thread
self.vcsthread = VcsThread(self, max(1, self.settings.idle_delay / 1000))
self.vcsthread.start()
def redraw(self):
"""Redraw all widgets"""
self.redrawlock.wait()
self.redrawlock.clear()
self.poke()
# determine which widgets are shown
if self.console.wait_for_command_input or self.console.question_queue:
self.console.focused = True
self.console.visible = True
self.status.visible = False
else:
self.console.focused = False
self.console.visible = False
self.status.visible = True
self.draw()
self.finalize()
self.redrawlock.set()
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.termsize = self.win.getmaxyx()
y, x = self.termsize
self.browser.resize(self.settings.status_bar_on_top and 2 or 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(self.settings.status_bar_on_top and 1 or 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.thisdir.path
if cwd.startswith(self.fm.home_path):
cwd = '~' + cwd[len(self.fm.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("%sranger:%s%s" %
(curses.tigetstr('tsl').decode('latin-1'), fixed_cwd,
curses.tigetstr('fsl').decode('latin-1')))
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 draw_images(self):
if self.pager.visible:
self.pager.draw_image()
elif self.browser.pager.visible:
self.browser.pager.draw_image()
else:
self.browser.columns[-1].draw_image()
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):
self.browser.columns[-1].clear_image(force=True)
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()
for column in self.browser.columns:
if column == self.browser.main_column:
break
column.level_shift(amount=1)
return self.browser.pager
def close_embedded_pager(self):
self.browser.close_pager()
for column in self.browser.columns:
column.level_restore()
def open_console(self, string='', prompt=None, position=None):
if self.console.open(string, prompt=prompt, position=position):
self.status.msg = None
def close_console(self):
self.console.close()
self.close_pager()
def open_taskview(self):
self.browser.columns[-1].clear_image(force=True)
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
def get_pager(self):
if self.browser.pager.visible:
return self.browser.pager
else:
return self.pager
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