231 lines
13 KiB
Python
231 lines
13 KiB
Python
#!/bin/python
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# -*- coding: utf-8 -*-
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# Fenrir TTY screen reader
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# By Chrys, Storm Dragon, and contributers.
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import difflib
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import re
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import subprocess
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import fcntl
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import termios
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import time
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import select
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import dbus
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from core import debug
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from core.eventData import fenrirEventType
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from utils import screen_utils
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class driver():
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def __init__(self):
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self.vcsaDevicePath = '/dev/vcsa'
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self.ListSessions = None
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def initialize(self, environment):
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self.env = environment
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self.env['runtime']['eventManager'].addCustomEventThread(self.updateWatchdog)
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def shutdown(self):
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pass
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def getCurrScreen(self):
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self.env['screen']['oldTTY'] = self.env['screen']['newTTY']
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try:
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currScreenFile = open('/sys/devices/virtual/tty/tty0/active','r')
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self.env['screen']['newTTY'] = str(currScreenFile.read()[3:-1])
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currScreenFile.close()
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except Exception as e:
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self.env['runtime']['debug'].writeDebugOut(str(e),debug.debugLevel.ERROR)
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def injectTextToScreen(self, text, screen = None):
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useScreen = "/dev/tty" + self.env['screen']['newTTY']
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if screen != None:
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useScreen = screen
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with open(useScreen, 'w') as fd:
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for c in text:
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fcntl.ioctl(fd, termios.TIOCSTI, c)
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def getCurrApplication(self):
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apps = []
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try:
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currScreen = self.env['screen']['newTTY']
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apps = subprocess.Popen('ps -t tty' + currScreen + ' -o comm,tty,stat', shell=True, stdout=subprocess.PIPE).stdout.read().decode()[:-1].split('\n')
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except Exception as e:
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self.env['runtime']['debug'].writeDebugOut(str(e),debug.debugLevel.ERROR)
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return
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try:
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for i in apps:
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i = i.upper()
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i = i.split()
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i[0] = i[0]
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i[1] = i[1]
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if '+' in i[2]:
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if i[0] != '':
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if not "GREP" == i[0] and \
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not "SH" == i[0] and \
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not "PS" == i[0]:
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if "TTY"+currScreen in i[1]:
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if self.env['screen']['newApplication'] != i[0]:
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self.env['screen']['newApplication'] = i[0]
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return
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except Exception as e:
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self.env['runtime']['debug'].writeDebugOut(str(e),debug.debugLevel.ERROR)
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def getSessionInformation(self):
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try:
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bus = dbus.SystemBus()
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if not self.ListSessions:
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obj = bus.get_object('org.freedesktop.login1', '/org/freedesktop/login1')
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inf = dbus.Interface(obj, 'org.freedesktop.login1.Manager')
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self.ListSessions = inf.get_dbus_method('ListSessions')
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sessions = self.ListSessions()
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self.env['screen']['autoIgnoreScreens'] = []
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for session in sessions:
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obj = bus.get_object('org.freedesktop.login1', session[4])
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inf = dbus.Interface(obj, 'org.freedesktop.DBus.Properties')
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sessionType = inf.Get('org.freedesktop.login1.Session', 'Type')
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screen = str(inf.Get('org.freedesktop.login1.Session', 'VTNr'))
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if screen == '':
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screen = str(inf.Get('org.freedesktop.login1.Session', 'TTY'))
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screen = screen[screen.upper().find('TTY') + 3:]
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if screen == '':
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self.env['runtime']['debug'].writeDebugOut('No TTY found for session:' + session[4],debug.debugLevel.ERROR)
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return
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if sessionType.upper() == 'X11':
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self.env['screen']['autoIgnoreScreens'].append(screen)
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if screen == self.env['screen']['newTTY'] :
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if self.env['general']['currUser'] != session[2]:
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self.env['general']['prevUser'] = self.env['general']['currUser']
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self.env['general']['currUser'] = session[2]
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except Exception as e:
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self.env['runtime']['debug'].writeDebugOut('getSessionInformation: Maybe no LoginD:' + str(e),debug.debugLevel.ERROR)
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self.env['screen']['autoIgnoreScreens'] = []
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def updateWatchdog(self,active , eventQueue):
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try:
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vcsa = {}
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for i in range(1,7):
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vcsa[str(i)] = open('/dev/vcsa'+str(i),'rb')
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tty = open('/sys/devices/virtual/tty/tty0/active','r')
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currScreen = str(tty.read()[3:-1])
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oldScreen = currScreen
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watchdog = select.epoll()
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watchdog.register(vcsa[currScreen], select.EPOLLPRI)
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watchdog.register(tty, select.EPOLLPRI)
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lastScreenContent = b''
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while active.value == 1:
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changes = watchdog.poll(2)
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for change in changes:
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fileno = change[0]
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event = change[1]
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if fileno == tty.fileno():
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self.env['runtime']['debug'].writeDebugOut('ScreenChange',debug.debugLevel.INFO)
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tty.seek(0)
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currScreen = str(tty.read()[3:-1])
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if currScreen != oldScreen:
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watchdog.unregister(vcsa[ oldScreen ])
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watchdog.register(vcsa[ currScreen ], select.EPOLLPRI)
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oldScreen = currScreen
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eventQueue.put({"Type":fenrirEventType.ScreenChanged,"Data":''})
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vcsa[currScreen].seek(0)
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lastScreenContent = vcsa[currScreen].read()
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else:
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self.env['runtime']['debug'].writeDebugOut('ScreenUpdate',debug.debugLevel.INFO)
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vcsa[currScreen].seek(0)
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screenContent = vcsa[currScreen].read()
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if screenContent != lastScreenContent:
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eventQueue.put({"Type":fenrirEventType.ScreenUpdate,"Data":''})
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lastScreenContent = screenContent
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except Exception as e:
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self.env['runtime']['debug'].writeDebugOut('VCSA:updateWatchdog:' + str(e),debug.debugLevel.ERROR)
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def update(self, trigger='onUpdate'):
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if trigger == 'onInput': # no need for an update on input for VCSA
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return
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#print(self.env['screen']['newTTY'], self.env['screen']['oldTTY'])
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newContentBytes = b''
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try:
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# read screen
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vcsa = open(self.vcsaDevicePath + self.env['screen']['newTTY'],'rb',0)
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newContentBytes = vcsa.read()
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vcsa.close()
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if len(newContentBytes) < 5:
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return
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except Exception as e:
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self.env['runtime']['debug'].writeDebugOut(str(e),debug.debugLevel.ERROR)
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return
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screenEncoding = self.env['runtime']['settingsManager'].getSetting('screen', 'encoding')
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# set new "old" values
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self.env['screen']['oldContentBytes'] = self.env['screen']['newContentBytes']
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self.env['screen']['oldContentText'] = self.env['screen']['newContentText']
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self.env['screen']['oldContentAttrib'] = self.env['screen']['newContentAttrib']
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self.env['screen']['oldCursor'] = self.env['screen']['newCursor'].copy()
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if self.env['screen']['newCursorAttrib']:
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self.env['screen']['oldCursorAttrib'] = self.env['screen']['newCursorAttrib'].copy()
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self.env['screen']['oldDelta'] = self.env['screen']['newDelta']
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self.env['screen']['oldAttribDelta'] = self.env['screen']['newAttribDelta']
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self.env['screen']['oldNegativeDelta'] = self.env['screen']['newNegativeDelta']
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self.env['screen']['newContentBytes'] = newContentBytes
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# get metadata like cursor or screensize
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self.env['screen']['lines'] = int( self.env['screen']['newContentBytes'][0])
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self.env['screen']['columns'] = int( self.env['screen']['newContentBytes'][1])
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self.env['screen']['newCursor']['x'] = int( self.env['screen']['newContentBytes'][2])
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self.env['screen']['newCursor']['y'] = int( self.env['screen']['newContentBytes'][3])
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# analyze content
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self.env['screen']['newContentText'] = self.env['screen']['newContentBytes'][4:][::2].decode(screenEncoding, "replace").encode('utf-8').decode('utf-8')
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self.env['screen']['newContentText'] = screen_utils.removeNonprintable(self.env['screen']['newContentText'])
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self.env['screen']['newContentAttrib'] = self.env['screen']['newContentBytes'][5:][::2]
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self.env['screen']['newContentText'] = screen_utils.insertNewlines(self.env['screen']['newContentText'], self.env['screen']['columns'])
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if self.env['screen']['newTTY'] != self.env['screen']['oldTTY']:
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self.env['screen']['oldContentBytes'] = b''
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self.env['screen']['oldContentAttrib'] = b''
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self.env['screen']['oldContentText'] = ''
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self.env['screen']['oldCursor']['x'] = 0
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self.env['screen']['oldCursor']['y'] = 0
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self.env['screen']['oldDelta'] = ''
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self.env['screen']['oldAttribDelta'] = ''
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self.env['screen']['oldCursorAttrib'] = None
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self.env['screen']['newCursorAttrib'] = None
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self.env['screen']['oldNegativeDelta'] = ''
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# initialize current deltas
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self.env['screen']['newNegativeDelta'] = ''
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self.env['screen']['newDelta'] = ''
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self.env['screen']['newAttribDelta'] = ''
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# changes on the screen
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oldScreenText = re.sub(' +',' ',self.env['runtime']['screenManager'].getWindowAreaInText(self.env['screen']['oldContentText']))
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newScreenText = re.sub(' +',' ',self.env['runtime']['screenManager'].getWindowAreaInText(self.env['screen']['newContentText']))
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typing = False
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if (self.env['screen']['oldContentText'] != self.env['screen']['newContentText']) and \
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(self.env['screen']['newContentText'] != '' ):
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if oldScreenText == '' and\
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newScreenText != '':
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self.env['screen']['newDelta'] = newScreenText
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else:
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cursorLineStart = self.env['screen']['newCursor']['y'] * self.env['screen']['columns'] + self.env['screen']['newCursor']['y']
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cursorLineEnd = cursorLineStart + self.env['screen']['columns']
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if self.env['screen']['oldCursor']['x'] != self.env['screen']['newCursor']['x'] and \
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self.env['screen']['oldCursor']['y'] == self.env['screen']['newCursor']['y'] and \
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self.env['screen']['newContentText'][:cursorLineStart] == self.env['screen']['oldContentText'][:cursorLineStart]:
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oldScreenText = self.env['screen']['oldContentText'][cursorLineStart:cursorLineEnd]
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oldScreenText = re.sub(' +',' ',oldScreenText)
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newScreenText = self.env['screen']['newContentText'][cursorLineStart:cursorLineEnd]
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newScreenText = re.sub(' +',' ',newScreenText)
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diff = difflib.ndiff(oldScreenText, newScreenText)
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typing = True
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else:
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diff = difflib.ndiff( oldScreenText.split('\n'),\
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newScreenText.split('\n'))
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diffList = list(diff)
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if self.env['runtime']['settingsManager'].getSetting('general', 'newLinePause') and not typing:
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self.env['screen']['newDelta'] = '\n'.join(x[2:] for x in diffList if x[0] == '+')
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else:
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self.env['screen']['newDelta'] = ''.join(x[2:] for x in diffList if x[0] == '+')
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self.env['screen']['newNegativeDelta'] = ''.join(x[2:] for x in diffList if x[0] == '-')
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# track highlighted
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if self.env['screen']['oldContentAttrib'] != self.env['screen']['newContentAttrib']:
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if self.env['runtime']['settingsManager'].getSettingAsBool('focus', 'highlight'):
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self.env['screen']['newAttribDelta'], self.env['screen']['newCursorAttrib'] = screen_utils.trackHighlights(self.env['screen']['oldContentAttrib'], self.env['screen']['newContentAttrib'], self.env['screen']['newContentText'], self.env['screen']['columns'])
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