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 configValue:
  82         def __init__(self, obj):
  83                 self.obj = obj
  84
  85         def __str__(self):
  86                 return self.obj
  87
  88 class Config:
  89         def __init__(self):
  90                 self.choseElement = 0
  91                 self.prevElement = 1
  92                 self.nextElement = 2
  93
  94 config = Config();
  95 configfile = configFile()
  96
  97 class ConfigSlider:
  98         def __init__(self, parent):
  99                 self.parent = parent
 100
 101         def cancel(self):
 102                 self.parent.reload()
 103
 104         def save(self):
 105                 self.parent.save()
 106
 107         def checkValues(self):
 108                 if self.parent.value < 0:
 109                         self.parent.value = 0
 110
 111                 if self.parent.value > 10:
 112                         self.parent.value = 10
 113
 114         def handleKey(self, key):
 115                 if key == config.prevElement:
 116                         self.parent.value = self.parent.value - 1
 117                 if key == config.nextElement:
 118                         self.parent.value = self.parent.value + 1
 119
 120                 self.checkValues()
 121                 self.parent.change()
 122
 123         def __call__(self):                     #needed by configlist
 124                 self.checkValues()
 125                 return ("slider", self.parent.value * 10)
 126
 127 class ConfigSubsection:
 128         def __init__(self):
 129                 pass
 130
 131 class configElement:
 132         def datafromFile(self, control, data):
 133                 if control == ConfigSlider:
 134                         return int(data);
 135                 elif control == configBoolean:
 136                         return int(data);
 137                 else:
 138                         return ""
 139
 140         def datatoFile(self, control, data):
 141                 if control == ConfigSlider:
 142                         return str(data);
 143                 elif control == configBoolean:
 144                         return str(data);
 145                 else:
 146                         return ""
 147
 148         def loadData(self):
 149                 try:
 150                         value = self.datafromFile(self.controlType, configfile.getKey(self.configPath))
 151                 except:
 152                         value = ""
 153
 154                 if value == "":
 155                         print "value not found - using default"
 156                         self.value = self.defaultValue
 157                         self.save()             #add missing value to dict
 158                 else:
 159                         self.value = value
 160
 161         def __init__(self, configPath, control, defaultValue, vals):
 162                 self.configPath = configPath
 163                 self.defaultValue = defaultValue
 164                 self.controlType = control
 165                 self.vals = vals
 166                 self.notifierList = [ ]
 167                 self.loadData()
 168         def addNotifier(self, notifier):
 169                 self.notifierList.append(notifier);
 170                 notifier(self);
 171         def change(self):
 172                 for notifier in self.notifierList:
 173                         notifier(self)
 174         def reload(self):
 175                 self.loadData()
 176         def save(self):
 177                 configfile.setKey(self.configPath, self.datatoFile(self.controlType,self.value))