lib/python/Components/config.py

   1 class configFile:
   2         def __init__(self):
   3                 self.changed = 0
   4                 self.configElements = { }
   5                 try:
   6                         self.file = open("config")
   7                 except IOError:
   8                         print "cannot open config file"
   9                         return
  10
  11                 while 1:
  12                         line = self.file.readline()
  13                         if line == "":
  14                                 break
  15
  16                         if line.startswith("#"):                #skip comments
  17                                 continue
  18
  19                         self.addElement(line)
  20                 self.file.close()
  21
  22         def addElement(self, line):
  23                 x = line.find("=")
  24                 if x > -1:
  25                         self.configElements[line[:x]] = line[x + 1:]
  26
  27         def getKey(self, key):
  28                 return self.configElements[key]
  29
  30         def setKey(self, key, value):
  31                 self.changed = 1
  32                 self.configElements[key] = value
  33
  34         def save(self):
  35                 if self.changed == 0:           #no changes, so no write to disk needed
  36                         return
  37
  38                 fileHandle = open("config", "w")
  39
  40                 for x in self.configElements:
  41                         wstr = x + "=" + self.configElements[x]
  42
  43                         if wstr[len(wstr) - 1] != '\n':
  44                                 wstr = wstr + "\n"
  45
  46                         fileHandle.write(wstr)
  47
  48                 fileHandle.close()
  49
  50 class configBoolean:
  51         def __init__(self, parent):
  52                 self.parent = parent
  53
  54         def checkValues(self):
  55                 if self.parent.value < 0:
  56                         self.parent.value = 0
  57
  58                 if(self.parent.value >= (len(self.parent.vals) - 1)):
  59                         self.parent.value = len(self.parent.vals) - 1
  60
  61         def cancel(self):
  62                 self.parent.reload()
  63
  64         def save(self):
  65                 self.parent.save()
  66
  67         def handleKey(self, key):
  68                 if key == config.prevElement:
  69                         self.parent.value = self.parent.value - 1
  70                 if key == config.nextElement:
  71                         self.parent.value = self.parent.value + 1
  72
  73                 self.checkValues()
  74
  75                 self.parent.change()
  76
  77         def __call__(self):                     #needed by configlist
  78                 self.checkValues()
  79                 return ("text", self.parent.vals[self.parent.value])
  80
  81 class configSequence:
  82         def __init__(self, parent):
  83                 self.parent = parent
  84
  85         def checkValues(self):
  86                 pass
  87 #               if self.parent.value < 0:
  88 #                       self.parent.value = 0
  89 #
  90 #               if(self.parent.value >= (len(self.parent.vals) - 1)):
  91 #                       self.parent.value = len(self.parent.vals) - 1
  92 #
  93         def cancel(self):
  94                 self.parent.reload()
  95
  96         def save(self):
  97                 self.parent.save()
  98
  99         def handleKey(self, key):
 100                 if key == config.prevElement:
 101                         self.parent.value = self.parent.value - 1
 102                 if key == config.nextElement:
 103                         self.parent.value = self.parent.value + 1
 104
 105                 self.checkValues()
 106
 107                 self.parent.change()
 108
 109         def __call__(self):                     #needed by configlist
 110                 value = ""
 111                 for i in self.parent.value:
 112                         if (value != ""):
 113                                 value += self.parent.vals[0]
 114                         value += str(i)
 115                 return ("text", value)
 116
 117 class configValue:
 118         def __init__(self, obj):
 119                 self.obj = obj
 120
 121         def __str__(self):
 122                 return self.obj
 123
 124 class Config:
 125         def __init__(self):
 126                 self.choseElement = 0
 127                 self.prevElement = 1
 128                 self.nextElement = 2
 129
 130 config = Config();
 131 configfile = configFile()
 132
 133 class ConfigSlider:
 134         def __init__(self, parent):
 135                 self.parent = parent
 136
 137         def cancel(self):
 138                 self.parent.reload()
 139
 140         def save(self):
 141                 self.parent.save()
 142
 143         def checkValues(self):
 144                 if self.parent.value < 0:
 145                         self.parent.value = 0
 146
 147                 if self.parent.value > 10:
 148                         self.parent.value = 10
 149
 150         def handleKey(self, key):
 151                 if key == config.prevElement:
 152                         self.parent.value = self.parent.value - 1
 153                 if key == config.nextElement:
 154                         self.parent.value = self.parent.value + 1
 155
 156                 self.checkValues()
 157                 self.parent.change()
 158
 159         def __call__(self):                     #needed by configlist
 160                 self.checkValues()
 161                 return ("slider", self.parent.value * 10)
 162
 163 class ConfigSubsection:
 164         def __init__(self):
 165                 pass
 166
 167 class configElement:
 168         def datafromFile(self, control, data):
 169                 if control == ConfigSlider:
 170                         return int(data);
 171                 elif control == configBoolean:
 172                         return int(data);
 173                 else:
 174                         return ""
 175
 176         def datatoFile(self, control, data):
 177                 if control == ConfigSlider:
 178                         return str(data);
 179                 elif control == configBoolean:
 180                         return str(data);
 181                 else:
 182                         return ""
 183
 184         def loadData(self):
 185                 try:
 186                         value = self.datafromFile(self.controlType, configfile.getKey(self.configPath))
 187                 except:
 188                         value = ""
 189
 190                 if value == "":
 191                         print "value not found - using default"
 192                         self.value = self.defaultValue
 193                         self.save()             #add missing value to dict
 194                 else:
 195                         self.value = value
 196
 197         def __init__(self, configPath, control, defaultValue, vals):
 198                 self.configPath = configPath
 199                 self.defaultValue = defaultValue
 200                 self.controlType = control
 201                 self.vals = vals
 202                 self.notifierList = [ ]
 203                 self.loadData()
 204         def addNotifier(self, notifier):
 205                 self.notifierList.append(notifier);
 206                 notifier(self);
 207         def change(self):
 208                 for notifier in self.notifierList:
 209                         notifier(self)
 210         def reload(self):
 211                 self.loadData()
 212         def save(self):
 213                 configfile.setKey(self.configPath, self.datatoFile(self.controlType,self.value))