fenrir/src/fenrir.py

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#!/bin/python
# Fenrir TTY screen reader
# By Chrys, Storm Dragon, and contributers.
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import hashlib
import difflib
import textwrap
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import speech.es as es
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import speech.sd as sd
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runtime = {
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'running':True,
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'columns': 0,
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'lines': 0,
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'screenDriver': '/dev/vcsa',
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'delta': '',
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'oldCursor':{'x':0,'y':0},
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'oldContentBytes': b'',
'oldContentText': '',
'oldContentAttrib': b'',
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'newCursor':{'x':0,'y':0},
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'newContentBytes': b'',
'newContentText': '',
'newContentAttrib': b'',
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'oldTTY':'0',
'newTTY':'0',
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'speechDriverString':'es',
'speechDriver': es.speech()
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}
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while(runtime['running']):
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# read screen
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currTTY = open('/sys/devices/virtual/tty/tty0/active','r')
runtime['newTTY'] = currTTY.read()[3:-1]
currTTY.close()
runtime['newTTY'] = '3'
try:
vcsa = open(runtime['screenDriver'] + runtime['newTTY'] ,'rb')
runtime['newContentBytes'] = vcsa.read()
vcsa.close()
except:
print(runtime['screenDriver'] + runtime['newTTY'])
continue
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# get metadata like cursor or screensize
runtime['lines'] = int( runtime['newContentBytes'][0])
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runtime['columns'] = int( runtime['newContentBytes'][1])
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runtime['newCursor']['x'] = int( runtime['newContentBytes'][2])
runtime['newCursor']['y'] = int( runtime['newContentBytes'][3])
# analyze content
runtime['newContentText'] = str(runtime['newContentBytes'][4:][::2].decode('cp1252').encode('utf-8'))
runtime['newContentAttrib'] = runtime['newContentBytes'][5:][::2]
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runtime['newContentText'] = '\n'.join(textwrap.wrap(runtime['newContentText'], runtime['columns']))[:-1]
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if runtime['newTTY'] != runtime['oldTTY']:
runtime['oldContentBytes'] = b''
runtime['oldContentAttrib'] = b''
runtime['oldContentText'] = ''
runtime['oldCursor']['x'] = 0
runtime['oldCursor']['y'] = 0
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# changes on the screen
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if runtime['oldContentBytes'] != runtime['newContentBytes']:
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if len(runtime['delta']) < 3:
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runtime['speechDriver'].cancel()
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print(len(runtime['delta']))
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print("tty3 changed")
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print(runtime['delta'])
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diff = difflib.ndiff(runtime['oldContentText'], runtime['newContentText'])
runtime['delta'] = ''.join(x[2:] for x in diff if x.startswith('+ '))
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print(runtime['delta'])
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runtime['speechDriver'].speak(runtime['delta'])
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# set new "old" values
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runtime['oldContentBytes'] = runtime['newContentBytes']
runtime['oldContentText'] = runtime['newContentText']
runtime['oldContentTextAttrib'] = runtime['newContentAttrib']
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runtime['oldCursor']['x'] = runtime['newCursor']['x']
runtime['oldCursor']['y'] = runtime['newCursor']['y']
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runtime['oldTTY'] = runtime['newTTY']