b9af72ea11
The warn() method tries to set the color to red. This leads to a garbled tty after endwin() has been called. So lets simply use the UIBase implementation. Signed-off-by: Christoph Höger <christoph.hoeger@tu-berlin.de>
625 lines
22 KiB
Python
625 lines
22 KiB
Python
# Curses-based interfaces
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# Copyright (C) 2003-2011 John Goerzen & contributors
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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from threading import RLock, currentThread, Lock, Event
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from collections import deque
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import time
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import sys
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import os
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import signal
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import curses
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import logging
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from offlineimap.ui.UIBase import UIBase
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from offlineimap.threadutil import ExitNotifyThread
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import offlineimap
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class CursesUtil:
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def __init__(self, *args, **kwargs):
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# iolock protects access to the
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self.iolock = RLock()
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self.tframe_lock = RLock()
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"""tframe_lock protects the self.threadframes manipulation to
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only happen from 1 thread"""
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self.colormap = {}
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"""dict, translating color string to curses color pair number"""
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def curses_colorpair(self, col_name):
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"""Return the curses color pair, that corresponds to the color"""
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return curses.color_pair(self.colormap[col_name])
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def init_colorpairs(self):
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"""initialize the curses color pairs available"""
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# set special colors 'gray' and 'banner'
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self.colormap['white'] = 0 #hardcoded by curses
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curses.init_pair(1, curses.COLOR_WHITE, curses.COLOR_BLUE)
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self.colormap['banner'] = 1 # color 'banner' for bannerwin
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bcol = curses.COLOR_BLACK
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colors = ( # name, color, bold?
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('black', curses.COLOR_BLACK, False),
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('blue', curses.COLOR_BLUE,False),
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('red', curses.COLOR_RED, False),
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('purple', curses.COLOR_MAGENTA, False),
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('cyan', curses.COLOR_CYAN, False),
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('green', curses.COLOR_GREEN, False),
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('orange', curses.COLOR_YELLOW, False))
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#set the rest of all colors starting at pair 2
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i = 1
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for name, fcol, bold in colors:
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i += 1
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self.colormap[name] = i
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curses.init_pair(i, fcol, bcol)
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def lock(self, block=True):
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"""Locks the Curses ui thread
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Can be invoked multiple times from the owning thread. Invoking
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from a non-owning thread blocks and waits until it has been
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unlocked by the owning thread."""
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return self.iolock.acquire(block)
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def unlock(self):
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"""Unlocks the Curses ui thread
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Decrease the lock counter by one and unlock the ui thread if the
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counter reaches 0. Only call this method when the calling
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thread owns the lock. A RuntimeError is raised if this method is
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called when the lock is unlocked."""
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self.iolock.release()
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def exec_locked(self, target, *args, **kwargs):
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"""Perform an operation with full locking."""
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self.lock()
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try:
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target(*args, **kwargs)
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finally:
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self.unlock()
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def refresh(self):
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def lockedstuff():
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curses.panel.update_panels()
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curses.doupdate()
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self.exec_locked(lockedstuff)
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def isactive(self):
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return hasattr(self, 'stdscr')
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class CursesAccountFrame:
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"""Notable instance variables:
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- account: corresponding Account()
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- children
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- ui
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- key
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- window: curses window associated with an account
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"""
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def __init__(self, ui, account):
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"""
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:param account: An Account() or None (for eg SyncrunnerThread)"""
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self.children = []
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self.account = account if account else '*Control'
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self.ui = ui
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self.window = None
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"""Curses window associated with this acc"""
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self.acc_num = None
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"""Account number (& hotkey) associated with this acc"""
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self.location = 0
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"""length of the account prefix string"""
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def drawleadstr(self, secs = 0):
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"""Draw the account status string
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secs tells us how long we are going to sleep."""
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sleepstr = '%3d:%02d' % (secs // 60, secs % 60) if secs else 'active'
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accstr = '%s: [%s] %12.12s: ' % (self.acc_num, sleepstr, self.account)
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self.ui.exec_locked(self.window.addstr, 0, 0, accstr)
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self.location = len(accstr)
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def setwindow(self, curses_win, acc_num):
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"""Register an curses win and a hotkey as Account window
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:param curses_win: the curses window associated with an account
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:param acc_num: int denoting the hotkey associated with this account."""
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self.window = curses_win
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self.acc_num = acc_num
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self.drawleadstr()
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# Update the child ThreadFrames
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for child in self.children:
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child.update(curses_win, self.location, 0)
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self.location += 1
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def get_new_tframe(self):
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"""Create a new ThreadFrame and append it to self.children
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:returns: The new ThreadFrame"""
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tf = CursesThreadFrame(self.ui, self.window, self.location, 0)
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self.location += 1
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self.children.append(tf)
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return tf
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def sleeping(self, sleepsecs, remainingsecs):
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"""show how long we are going to sleep and sleep
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:returns: Boolean, whether we want to abort the sleep"""
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self.drawleadstr(remainingsecs)
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self.ui.exec_locked(self.window.refresh)
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time.sleep(sleepsecs)
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return self.account.get_abort_event()
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def syncnow(self):
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"""Request that we stop sleeping asap and continue to sync"""
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# if this belongs to an Account (and not *Control), set the
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# skipsleep pref
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if isinstance(self.account, offlineimap.accounts.Account):
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self.ui.info("Requested synchronization for acc: %s" % self.account)
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self.account.config.set('Account %s' % self.account.name,
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'skipsleep', '1')
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class CursesThreadFrame:
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"""
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curses_color: current color pair for logging"""
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def __init__(self, ui, acc_win, x, y):
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"""
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:param ui: is a Blinkenlights() instance
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:param acc_win: curses Account window"""
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self.ui = ui
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self.window = acc_win
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self.x = x
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self.y = y
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self.curses_color = curses.color_pair(0) #default color
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def setcolor(self, color, modifier=0):
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"""Draw the thread symbol '@' in the specified color
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:param modifier: Curses modified, such as curses.A_BOLD"""
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self.curses_color = modifier | self.ui.curses_colorpair(color)
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self.colorname = color
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self.display()
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def display(self):
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def locked_display():
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self.window.addch(self.y, self.x, '@', self.curses_color)
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self.window.refresh()
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# lock the curses IO while fudging stuff
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self.ui.exec_locked(locked_display)
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def update(self, acc_win, x, y):
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"""Update the xy position of the '.' (and possibly the aframe)"""
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self.window = acc_win
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self.y = y
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self.x = x
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self.display()
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def std_color(self):
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self.setcolor('black')
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class InputHandler(ExitNotifyThread):
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"""Listens for input via the curses interfaces"""
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#TODO, we need to use the ugly exitnotifythread (rather than simply
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#threading.Thread here, so exiting this thread via the callback
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#handler, kills off all parents too. Otherwise, they would simply
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#continue.
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def __init__(self, ui):
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super(InputHandler, self).__init__()
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self.char_handler = None
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self.ui = ui
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self.enabled = Event()
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"""We will only parse input if we are enabled"""
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self.inputlock = RLock()
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"""denotes whether we should be handling the next char."""
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self.start() #automatically start the thread
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def get_next_char(self):
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"""return the key pressed or -1
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Wait until `enabled` and loop internally every stdscr.timeout()
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msecs, releasing the inputlock.
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:returns: char or None if disabled while in here"""
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self.enabled.wait()
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while self.enabled.is_set():
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with self.inputlock:
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char = self.ui.stdscr.getch()
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if char != -1: yield char
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def run(self):
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while True:
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char_gen = self.get_next_char()
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for char in char_gen:
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self.char_handler(char)
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#curses.ungetch(char)
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def set_char_hdlr(self, callback):
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"""Sets a character callback handler
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If a key is pressed it will be passed to this handler. Keys
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include the curses.KEY_RESIZE key.
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callback is a function taking a single arg -- the char pressed.
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If callback is None, input will be ignored."""
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with self.inputlock:
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self.char_handler = callback
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# start or stop the parsing of things
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if callback is None:
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self.enabled.clear()
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else:
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self.enabled.set()
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def input_acquire(self):
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"""Call this method when you want exclusive input control.
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Make sure to call input_release afterwards! While this lockis
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held, input can go to e.g. the getpass input.
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"""
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self.enabled.clear()
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self.inputlock.acquire()
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def input_release(self):
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"""Call this method when you are done getting input."""
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self.inputlock.release()
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self.enabled.set()
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class CursesLogHandler(logging.StreamHandler):
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"""self.ui has been set to the UI class before anything is invoked"""
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def emit(self, record):
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log_str = logging.StreamHandler.format(self, record)
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color = self.ui.gettf().curses_color
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# We must acquire both locks. Otherwise, deadlock can result.
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# This can happen if one thread calls _msg (locking curses, then
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# tf) and another tries to set the color (locking tf, then curses)
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#
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# By locking both up-front here, in this order, we prevent deadlock.
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self.ui.tframe_lock.acquire()
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self.ui.lock()
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try:
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y,x = self.ui.logwin.getyx()
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if y or x: self.ui.logwin.addch(10) # no \n before 1st item
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self.ui.logwin.addstr(log_str, color)
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finally:
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self.ui.unlock()
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self.ui.tframe_lock.release()
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self.ui.logwin.noutrefresh()
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self.ui.stdscr.refresh()
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class Blinkenlights(UIBase, CursesUtil):
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"""Curses-cased fancy UI
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Notable instance variables self. ....:
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- stdscr: THe curses std screen
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- bannerwin: The top line banner window
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- width|height: The total curses screen dimensions
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- logheight: Available height for the logging part
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- log_con_handler: The CursesLogHandler()
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- threadframes:
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- accframes[account]: 'Accountframe'"""
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def __init__(self, *args, **kwargs):
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super(Blinkenlights, self).__init__(*args, **kwargs)
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CursesUtil.__init__(self)
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################################################## UTILS
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def setup_consolehandler(self):
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"""Backend specific console handler
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Sets up things and adds them to self.logger.
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:returns: The logging.Handler() for console output"""
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# create console handler with a higher log level
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ch = CursesLogHandler()
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#ch.setLevel(logging.DEBUG)
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# create formatter and add it to the handlers
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self.formatter = logging.Formatter("%(message)s")
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ch.setFormatter(self.formatter)
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# add the handlers to the logger
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self.logger.addHandler(ch)
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# the handler is not usable yet. We still need all the
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# intialization stuff currently done in init_banner. Move here?
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return ch
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def isusable(s):
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"""Returns true if the backend is usable ie Curses works"""
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# Not a terminal? Can't use curses.
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if not sys.stdout.isatty() and sys.stdin.isatty():
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return False
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# No TERM specified? Can't use curses.
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if not os.environ.get('TERM', None):
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return False
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# Test if ncurses actually starts up fine. Only do so for
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# python>=2.6.6 as calling initscr() twice messing things up.
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# see http://bugs.python.org/issue7567 in python 2.6 to 2.6.5
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if sys.version_info[0:3] < (2,6) or sys.version_info[0:3] >= (2,6,6):
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try:
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curses.initscr()
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curses.endwin()
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except:
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return False
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return True
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def init_banner(self):
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self.availablethreadframes = {}
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self.threadframes = {}
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self.accframes = {}
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self.aflock = Lock()
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self.stdscr = curses.initscr()
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# turn off automatic echoing of keys to the screen
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curses.noecho()
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# react to keys instantly, without Enter key
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curses.cbreak()
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# return special key values, eg curses.KEY_LEFT
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self.stdscr.keypad(1)
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# wait 1s for input, so we don't block the InputHandler infinitely
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self.stdscr.timeout(1000)
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curses.start_color()
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# turn off cursor and save original state
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self.oldcursor = None
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try:
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self.oldcursor = curses.curs_set(0)
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except:
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pass
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self.stdscr.clear()
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self.stdscr.refresh()
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self.init_colorpairs()
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# set log handlers ui to ourself
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self._log_con_handler.ui = self
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self.setupwindows()
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# Settup keyboard handler
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self.inputhandler = InputHandler(self)
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self.inputhandler.set_char_hdlr(self.on_keypressed)
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self.gettf().setcolor('red')
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self.info(offlineimap.banner)
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def acct(self, *args):
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"""Output that we start syncing an account (and start counting)"""
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self.gettf().setcolor('purple')
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super(Blinkenlights, self).acct(*args)
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def connecting(self, *args):
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self.gettf().setcolor('white')
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super(Blinkenlights, self).connecting(*args)
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def syncfolders(self, *args):
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self.gettf().setcolor('blue')
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super(Blinkenlights, self).syncfolders(*args)
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def syncingfolder(self, *args):
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self.gettf().setcolor('cyan')
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super(Blinkenlights, self).syncingfolder(*args)
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def skippingfolder(self, *args):
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self.gettf().setcolor('cyan')
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super(Blinkenlights, self).skippingfolder(*args)
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def loadmessagelist(self, *args):
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self.gettf().setcolor('green')
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super(Blinkenlights, self).loadmessagelist(*args)
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def syncingmessages(self, *args):
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self.gettf().setcolor('blue')
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super(Blinkenlights, self).syncingmessages(*args)
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def copyingmessage(self, *args):
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self.gettf().setcolor('orange')
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super(Blinkenlights, self).copyingmessage(*args)
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def deletingmessages(self, *args):
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self.gettf().setcolor('red')
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super(Blinkenlights, self).deletingmessages(*args)
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def addingflags(self, *args):
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self.gettf().setcolor('blue')
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super(Blinkenlights, self).addingflags(*args)
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def deletingflags(self, *args):
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self.gettf().setcolor('blue')
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super(Blinkenlights, self).deletingflags(*args)
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def callhook(self, *args):
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self.gettf().setcolor('white')
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super(Blinkenlights, self).callhook(*args)
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############ Generic logging functions #############################
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def warn(self, msg, minor=0):
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self.gettf().setcolor('red', curses.A_BOLD)
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super(Blinkenlights, self).warn(msg)
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def threadExited(self, thread):
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acc = self.getthreadaccount(thread)
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with self.tframe_lock:
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if thread in self.threadframes[acc]:
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tf = self.threadframes[acc][thread]
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tf.setcolor('black')
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self.availablethreadframes[acc].append(tf)
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del self.threadframes[acc][thread]
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super(Blinkenlights, self).threadExited(thread)
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def gettf(self):
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"""Return the ThreadFrame() of the current thread"""
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cur_thread = currentThread()
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acc = self.getthreadaccount() #Account() or None
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with self.tframe_lock:
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# Ideally we already have self.threadframes[accountname][thread]
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try:
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if cur_thread in self.threadframes[acc]:
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return self.threadframes[acc][cur_thread]
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except KeyError:
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# Ensure threadframes already has an account dict
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self.threadframes[acc] = {}
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self.availablethreadframes[acc] = deque()
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# If available, return a ThreadFrame()
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if len(self.availablethreadframes[acc]):
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tf = self.availablethreadframes[acc].popleft()
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tf.std_color()
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else:
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tf = self.getaccountframe(acc).get_new_tframe()
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self.threadframes[acc][cur_thread] = tf
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return tf
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def on_keypressed(self, key):
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# received special KEY_RESIZE, resize terminal
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if key == curses.KEY_RESIZE:
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self.resizeterm()
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if key < 1 or key > 255:
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return
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if chr(key) == 'q':
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# Request to quit completely.
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self.warn("Requested shutdown via 'q'")
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offlineimap.accounts.Account.set_abort_event(self.config, 3)
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try:
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index = int(chr(key))
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except ValueError:
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return # Key not a valid number: exit.
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if index >= len(self.hotkeys):
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# Not in our list of valid hotkeys.
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return
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# Trying to end sleep somewhere.
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self.getaccountframe(self.hotkeys[index]).syncnow()
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def sleep(self, sleepsecs, account):
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self.gettf().setcolor('red')
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self.info("Next sync in %d:%02d" % (sleepsecs / 60, sleepsecs % 60))
|
|
return super(Blinkenlights, self).sleep(sleepsecs, account)
|
|
|
|
def sleeping(self, sleepsecs, remainingsecs):
|
|
if not sleepsecs:
|
|
# reset color to default if we are done sleeping.
|
|
self.gettf().setcolor('white')
|
|
accframe = self.getaccountframe(self.getthreadaccount())
|
|
return accframe.sleeping(sleepsecs, remainingsecs)
|
|
|
|
def resizeterm(self):
|
|
"""Resize the current windows"""
|
|
self.exec_locked(self.setupwindows, True)
|
|
|
|
def mainException(self):
|
|
UIBase.mainException(self)
|
|
|
|
def getpass(self, accountname, config, errmsg = None):
|
|
# disable the hotkeys inputhandler
|
|
self.inputhandler.input_acquire()
|
|
|
|
# See comment on _msg for info on why both locks are obtained.
|
|
self.lock()
|
|
try:
|
|
#s.gettf().setcolor('white')
|
|
self.warn(" *** Input Required")
|
|
self.warn(" *** Please enter password for account %s: " % \
|
|
accountname)
|
|
self.logwin.refresh()
|
|
password = self.logwin.getstr()
|
|
finally:
|
|
self.unlock()
|
|
self.inputhandler.input_release()
|
|
return password
|
|
|
|
def setupwindows(self, resize=False):
|
|
"""Setup and draw bannerwin and logwin
|
|
|
|
If `resize`, don't create new windows, just adapt size. This
|
|
function should be invoked with CursesUtils.locked()."""
|
|
self.height, self.width = self.stdscr.getmaxyx()
|
|
self.logheight = self.height - len(self.accframes) - 1
|
|
if resize:
|
|
curses.resizeterm(self.height, self.width)
|
|
self.bannerwin.resize(1, self.width)
|
|
self.logwin.resize(self.logheight, self.width)
|
|
else:
|
|
self.bannerwin = curses.newwin(1, self.width, 0, 0)
|
|
self.logwin = curses.newwin(self.logheight, self.width, 1, 0)
|
|
|
|
self.draw_bannerwin()
|
|
self.logwin.idlok(True) # needed for scrollok below
|
|
self.logwin.scrollok(True) # scroll window when too many lines added
|
|
self.draw_logwin()
|
|
self.accounts = reversed(sorted(self.accframes.keys()))
|
|
pos = self.height - 1
|
|
index = 0
|
|
self.hotkeys = []
|
|
for account in self.accounts:
|
|
acc_win = curses.newwin(1, self.width, pos, 0)
|
|
self.accframes[account].setwindow(acc_win, index)
|
|
self.hotkeys.append(account)
|
|
index += 1
|
|
pos -= 1
|
|
curses.doupdate()
|
|
|
|
def draw_bannerwin(self):
|
|
"""Draw the top-line banner line"""
|
|
if curses.has_colors():
|
|
color = curses.A_BOLD | self.curses_colorpair('banner')
|
|
else:
|
|
color = curses.A_REVERSE
|
|
self.bannerwin.clear() # Delete old content (eg before resizes)
|
|
self.bannerwin.bkgd(' ', color) # Fill background with that color
|
|
string = "%s %s" % (offlineimap.__productname__,
|
|
offlineimap.__version__)
|
|
self.bannerwin.addstr(0, 0, string, color)
|
|
self.bannerwin.addstr(0, self.width -len(offlineimap.__copyright__) -1,
|
|
offlineimap.__copyright__, color)
|
|
self.bannerwin.noutrefresh()
|
|
|
|
def draw_logwin(self):
|
|
"""(Re)draw the current logwindow"""
|
|
if curses.has_colors():
|
|
color = curses.color_pair(0) #default colors
|
|
else:
|
|
color = curses.A_NORMAL
|
|
self.logwin.move(0, 0)
|
|
self.logwin.erase()
|
|
self.logwin.bkgd(' ', color)
|
|
|
|
def getaccountframe(self, acc_name):
|
|
"""Return an AccountFrame() corresponding to acc_name
|
|
|
|
Note that the *control thread uses acc_name `None`."""
|
|
with self.aflock:
|
|
# 1) Return existing or 2) create a new CursesAccountFrame.
|
|
if acc_name in self.accframes: return self.accframes[acc_name]
|
|
self.accframes[acc_name] = CursesAccountFrame(self, acc_name)
|
|
# update the window layout
|
|
self.setupwindows(resize= True)
|
|
return self.accframes[acc_name]
|
|
|
|
def terminate(self, *args, **kwargs):
|
|
curses.nocbreak();
|
|
self.stdscr.keypad(0);
|
|
curses.echo()
|
|
curses.endwin()
|
|
# need to remove the Curses console handler now and replace with
|
|
# basic one, so exceptions and stuff are properly displayed
|
|
self.logger.removeHandler(self._log_con_handler)
|
|
UIBase.setup_consolehandler(self)
|
|
# reset the warning method, we do not have curses anymore
|
|
self.warn = super(Blinkenlights, self).warn
|
|
# finally call parent terminate which prints out exceptions etc
|
|
super(Blinkenlights, self).terminate(*args, **kwargs)
|
|
|
|
def threadException(self, thread):
|
|
#self._log_con_handler.stop()
|
|
UIBase.threadException(self, thread)
|
|
|