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 = None
  46
  47
  48     def push(self, command):
  49         """Send command to the interpreter to be executed.
  50
  51         Because this may be called recursively, we append a new list
  52         onto the commandBuffer list and then append commands into
  53         that.  If the passed in command is part of a multi-line
  54         command we keep appending the pieces to the last list in
  55         commandBuffer until we have a complete command. If not, we
  56         delete that last list."""
  57
  58         # In case the command is unicode try encoding it
  59         if type(command) == unicode:
  60             try:
  61                 command = command.encode(wx.GetDefaultPyEncoding())
  62             except UnicodeEncodeError:
  63                 pass # otherwise leave it alone
  64
  65         if not self.more:
  66             try: del self.commandBuffer[-1]
  67             except IndexError: pass
  68         if not self.more: self.commandBuffer.append([])
  69         self.commandBuffer[-1].append(command)
  70         source = '\n'.join(self.commandBuffer[-1])
  71         more = self.more = self.runsource(source)
  72         dispatcher.send(signal='Interpreter.push', sender=self,
  73                         command=command, more=more, source=source)
  74         return more
  75
  76     def runsource(self, source):
  77         """Compile and run source code in the interpreter."""
  78         stdin, stdout, stderr = sys.stdin, sys.stdout, sys.stderr
  79         sys.stdin, sys.stdout, sys.stderr = \
  80                    self.stdin, self.stdout, self.stderr
  81         more = InteractiveInterpreter.runsource(self, source)
  82         # If sys.std* is still what we set it to, then restore it.
  83         # But, if the executed source changed sys.std*, assume it was
  84         # meant to be changed and leave it. Power to the people.
  85         if sys.stdin == self.stdin:
  86             sys.stdin = stdin
  87         if sys.stdout == self.stdout:
  88             sys.stdout = stdout
  89         if sys.stderr == self.stderr:
  90             sys.stderr = stderr
  91         return more
  92
  93     def getAutoCompleteKeys(self):
  94         """Return list of auto-completion keycodes."""
  95         return [ord('.')]
  96
  97     def getAutoCompleteList(self, command='', *args, **kwds):
  98         """Return list of auto-completion options for a command.
  99
 100         The list of options will be based on the locals namespace."""
 101         stdin, stdout, stderr = sys.stdin, sys.stdout, sys.stderr
 102         sys.stdin, sys.stdout, sys.stderr = \
 103                    self.stdin, self.stdout, self.stderr
 104         l = introspect.getAutoCompleteList(command, self.locals,
 105                                            *args, **kwds)
 106         sys.stdin, sys.stdout, sys.stderr = stdin, stdout, stderr
 107         return l
 108
 109     def getCallTip(self, command='', *args, **kwds):
 110         """Return call tip text for a command.
 111
 112         Call tip information will be based on the locals namespace."""
 113         return introspect.getCallTip(command, self.locals, *args, **kwds)
 114
 115
 116 class InterpreterAlaCarte(Interpreter):
 117     """Demo Interpreter."""
 118
 119     def __init__(self, locals, rawin, stdin, stdout, stderr,
 120                  ps1='main prompt', ps2='continuation prompt'):
 121         """Create an interactive interpreter object."""
 122         Interpreter.__init__(self, locals=locals, rawin=rawin,
 123                              stdin=stdin, stdout=stdout, stderr=stderr)
 124         sys.ps1 = ps1
 125         sys.ps2 = ps2
 126
 127