Source Code for Module brailleDisplayDrivers.lilli

  1  #brailleDisplayDrivers/lilli.py 
  2  #A part of NonVisual Desktop Access (NVDA) 
  3  #This file is covered by the GNU General Public License. 
  4  #See the file COPYING for more details. 
  5  #Copyright (C) 2008-2011 Gianluca Casalino <gianluca@spazioausili.net>, Alberto Benassati <benassati@cavazza.it> 
  6   
  7  from logHandler import log 
  8  from ctypes import * 
  9  import inputCore 
 10  import wx 
 11  import braille 
 12   
 13  try: 
 14          lilliDll=windll.LoadLibrary("brailleDisplayDrivers\\lilli.dll") 
 15  except: 
 16          lilliDll=None 
 17   
 18  lilliCellsMap=[] 
 19  KEY_CHECK_INTERVAL = 50 
 20   
 21  LILLI_KEYS = [ 
 22          "", "F1", "F2", "F3", "F4",  "F5", "F6", "F7", "F8", "F9", "F10", "LF", "UP", "RG", "DN", "",  
 23          "", "SF1", "SF2", "SF3", "SF4",  "SF5", "SF6", "SF7", "SF8", "SF9", "SF10", "SLF", "SUP", "SRG", "SDN", "",  
 24          "", "LF1", "LF2", "LF3", "LF4",  "LF5", "LF6", "LF7", "LF8", "LF9", "LF10", "LLF", "LUP", "LRG", "LDN", "",  
 25          "", "SLF1", "SLF2", "SLF3", "SLF4",  "SLF5", "SLF6", "SLF7", "SLF8", "SLF9", "SLF10", "SLLF", "SLUP", "SLRG", "SLDN", "SFDN", "SFUP", 
 26          "route" 
 27  ] 
 28   
 29   
 30 -def convertLilliCells(cell): 
 31          newCell = ((1<<6 if cell & 1<<4 else 0) | 
 32                  (1<<5 if cell & 1<<5  else 0) | 
 33                  (1<<0 if cell & 1<<6  else 0) | 
 34                  (1<<3 if cell & 1<<0  else 0) | 
 35                  (1<<2 if cell & 1<<1  else 0) | 
 36                  (1<<1 if cell & 1<<2  else 0) | 
 37                  (1<<7 if cell & 1<<3  else 0) | 
 38                  (1<<4 if cell & 1<<7  else 0)) 
 39          return newCell 
 40   
 41 -class BrailleDisplayDriver(braille.BrailleDisplayDriver): 
 42          name = "lilli" 
 43          description = _("MDV Lilli") 
 44   
 45          @classmethod 
 46 -        def check(cls): 
 47                  return bool(lilliDll) 
 48   
 49 -        def  __init__(self): 
 50                  global lilliCellsMap 
 51                  super(BrailleDisplayDriver, self).__init__() 
 52                  lilliCellsMap=[convertLilliCells(x) for x in range(256)] 
 53                  if (lilliDll.Init408USB()): 
 54                          self._keyCheckTimer = wx.PyTimer(self._handleKeyPresses) 
 55                          self._keyCheckTimer.Start(KEY_CHECK_INTERVAL) 
 56                  else: 
 57                          raise RuntimeError("No display found") 
 58   
 59 -        def terminate(self): 
 60                  super(BrailleDisplayDriver, self).terminate() 
 61                  try: 
 62                          self._keyCheckTimer.Stop() 
 63                          self._keyCheckTimer = None 
 64                  except: 
 65                          pass 
 66                  lilliDll.Close408USB() 
 67   
 68 -        def _get_numCells(self): 
 69                  return 40 
 70   
 71 -        def _handleKeyPresses(self): 
 72                  while True: 
 73                          try: 
 74                                  key=lilliDll.ReadBuf() 
 75                          except: 
 76                                  pass 
 77                          if not key: break 
 78                          if (key <= 64) or ((key >= 257) and (key <= 296)):  
 79                                  self._onKeyPress(key) 
 80   
 81 -        def _onKeyPress(self, key): 
 82                  try: 
 83                          if (key >= 257) and (key <= 296):                                  
 84                                  inputCore.manager.executeGesture(InputGesture(LILLI_KEYS[65],key-256)) 
 85                          elif (key <= 64): 
 86                                  inputCore.manager.executeGesture(InputGesture(LILLI_KEYS[key],0)) 
 87                  except inputCore.NoInputGestureAction: 
 88                          pass 
 89   
 90 -        def display(self, cells): 
 91                  cells="".join(chr(lilliCellsMap[x]) for x in cells) 
 92                  lilliDll.WriteBuf(cells)  
 93   
 94          gestureMap = inputCore.GlobalGestureMap({ 
 95                  "globalCommands.GlobalCommands": { 
 96                          "braille_routeTo": ("br(lilli):route",), 
 97                          "braille_scrollBack": ("br(lilli):LF",), 
 98                          "braille_previousLine": ("br(lilli):UP",), 
 99                          "braille_nextLine": ("br(lilli):DN",), 
100                          "braille_scrollForward": ("br(lilli):RG",),                      
101                          "kb:shift+tab": ("br(lilli):SLF",), 
102                          "kb:tab": ("br(lilli):SRG",), 
103                          "kb:alt+tab": ("br(lilli):SDN",), 
104                          "kb:alt+shift+tab": ("br(lilli):SUP",), 
105                  } 
106          }) 
107   
108 -class InputGesture(braille.BrailleDisplayGesture): 
109   
110          source = BrailleDisplayDriver.name 
111   
112 -        def __init__(self, command, argument): 
113                  super(InputGesture, self).__init__() 
114                  self.id = command 
115                  if (command == LILLI_KEYS[65]): 
116                          self.routingIndex = argument 
117