59 lines
2.4 KiB
Python
59 lines
2.4 KiB
Python
#!/bin/python
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import difflib
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import textwrap
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import time
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#import fenrir.utils.debug
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class screenManager():
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def __init__(self, device='/dev/vcsa'):
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self.vcsaDevice = device
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def analyzeScreen(self, runtime):
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# read screen
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currTTY = open('/sys/devices/virtual/tty/tty0/active','r')
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runtime['newTTY'] = currTTY.read()[3:-1]
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currTTY.close()
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try:
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vcsa = open(self.vcsaDevice + runtime['newTTY'] ,'rb',0)
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runtime['newContentBytes'] = vcsa.read()
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vcsa.close()
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except:
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return runtime
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# get metadata like cursor or screensize
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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])
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runtime['newCursor']['y'] = int( runtime['newContentBytes'][3])
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# analyze content
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runtime['newContentText'] = str(runtime['newContentBytes'][4:][::2].decode('cp1252').encode('utf-8'))[2:]
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runtime['newContentAttrib'] = runtime['newContentBytes'][5:][::2]
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runtime['newContentText'] = '\n'.join(textwrap.wrap(runtime['newContentText'], runtime['columns']))[:-2]
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if runtime['newTTY'] != runtime['oldTTY']:
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runtime['oldContentBytes'] = b''
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runtime['oldContentAttrib'] = b''
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runtime['oldContentText'] = ''
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runtime['oldCursor']['x'] = 0
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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']) < 4) or runtime['oldTTY'] != runtime['newTTY']):
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runtime['speechDriver'].cancel()
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diff = difflib.ndiff(runtime['oldContentText'], runtime['newContentText'])
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runtime['delta'] = ''.join(x[2:] for x in diff if x.startswith('+ '))
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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']
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runtime['oldContentText'] = runtime['newContentText']
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runtime['oldContentTextAttrib'] = runtime['newContentAttrib']
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runtime['oldCursor']['x'] = runtime['newCursor']['x']
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runtime['oldCursor']['y'] = runtime['newCursor']['y']
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runtime['oldTTY'] = runtime['newTTY']
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return runtime
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