wxPython/wx/py/interpreter.py

   1 """Interpreter executes Python commands."""
   2
   3 __author__ = "Patrick K. O'Brien <pobrien@orbtech.com>"
   4 __cvsid__ = "$Id$"
   5 __revision__ = "$Revision$"[11:-2]
   6
   7 import os
   8 import sys
   9 from code import InteractiveInterpreter
  10 import dispatcher
  11 import introspect
  12 import wx
  13
  14 class Interpreter(InteractiveInterpreter):
  15     """Interpreter based on code.InteractiveInterpreter."""
  16
  17     revision = __revision__
  18
  19     def __init__(self, locals=None, rawin=None,
  20                  stdin=sys.stdin, stdout=sys.stdout, stderr=sys.stderr):
  21         """Create an interactive interpreter object."""
  22         InteractiveInterpreter.__init__(self, locals=locals)
  23         self.stdin = stdin
  24         self.stdout = stdout
  25         self.stderr = stderr
  26         if rawin:
  27             import __builtin__
  28             __builtin__.raw_input = rawin
  29             del __builtin__
  30         copyright = 'Type "help", "copyright", "credits" or "license"'
  31         copyright += ' for more information.'
  32         self.introText = 'Python %s on %s%s%s' % \
  33                          (sys.version, sys.platform, os.linesep, copyright)
  34         try:
  35             sys.ps1
  36         except AttributeError:
  37             sys.ps1 = '>>> '
  38         try:
  39             sys.ps2
  40         except AttributeError:
  41             sys.ps2 = '... '
  42         self.more = 0
  43         # List of lists to support recursive push().
  44         self.commandBuffer = []
  45         self.startupScript = os.environ.get('PYTHONSTARTUP')
  46
  47     def push(self, command):
  48         """Send command to the interpreter to be executed.
  49
  50         Because this may be called recursively, we append a new list
  51         onto the commandBuffer list and then append commands into
  52         that.  If the passed in command is part of a multi-line
  53         command we keep appending the pieces to the last list in
  54         commandBuffer until we have a complete command. If not, we
  55         delete that last list."""
  56
  57         # In case the command is unicode try encoding it
  58         if type(command) == unicode:
  59             try:
  60                 command = command.encode(wx.GetDefaultPyEncoding())
  61             except UnicodeEncodeError:
  62                 pass # otherwise leave it alone
  63
  64         if not self.more:
  65             try: del self.commandBuffer[-1]
  66             except IndexError: pass
  67         if not self.more: self.commandBuffer.append([])
  68         self.commandBuffer[-1].append(command)
  69         source = '\n'.join(self.commandBuffer[-1])
  70         more = self.more = self.runsource(source)
  71         dispatcher.send(signal='Interpreter.push', sender=self,
  72                         command=command, more=more, source=source)
  73         return more
  74
  75     def runsource(self, source):
  76         """Compile and run source code in the interpreter."""
  77         stdin, stdout, stderr = sys.stdin, sys.stdout, sys.stderr
  78         sys.stdin, sys.stdout, sys.stderr = \
  79                    self.stdin, self.stdout, self.stderr
  80         more = InteractiveInterpreter.runsource(self, source)
  81         # If sys.std* is still what we set it to, then restore it.
  82         # But, if the executed source changed sys.std*, assume it was
  83         # meant to be changed and leave it. Power to the people.
  84         if sys.stdin == self.stdin:
  85             sys.stdin = stdin
  86         if sys.stdout == self.stdout:
  87             sys.stdout = stdout
  88         if sys.stderr == self.stderr:
  89             sys.stderr = stderr
  90         return more
  91
  92     def getAutoCompleteKeys(self):
  93         """Return list of auto-completion keycodes."""
  94         return [ord('.')]
  95
  96     def getAutoCompleteList(self, command='', *args, **kwds):
  97         """Return list of auto-completion options for a command.
  98
  99         The list of options will be based on the locals namespace."""
 100         stdin, stdout, stderr = sys.stdin, sys.stdout, sys.stderr
 101         sys.stdin, sys.stdout, sys.stderr = \
 102                    self.stdin, self.stdout, self.stderr
 103         l = introspect.getAutoCompleteList(command, self.locals,
 104                                            *args, **kwds)
 105         sys.stdin, sys.stdout, sys.stderr = stdin, stdout, stderr
 106         return l
 107
 108     def getCallTip(self, command='', *args, **kwds):
 109         """Return call tip text for a command.
 110
 111         Call tip information will be based on the locals namespace."""
 112         return introspect.getCallTip(command, self.locals, *args, **kwds)
 113
 114
 115 class InterpreterAlaCarte(Interpreter):
 116     """Demo Interpreter."""
 117
 118     def __init__(self, locals, rawin, stdin, stdout, stderr,
 119                  ps1='main prompt', ps2='continuation prompt'):
 120         """Create an interactive interpreter object."""
 121         Interpreter.__init__(self, locals=locals, rawin=rawin,
 122                              stdin=stdin, stdout=stdout, stderr=stderr)
 123         sys.ps1 = ps1
 124         sys.ps2 = ps2
 125
 126