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00001 """
      Copyright (c) 2006-2008, Stefan Sakalik, Reinhard Katzmann, Matevz Jekovec, Canorus development team
      All Rights Reserved. See AUTHORS for a complete list of authors.

      Based on code inspired by similar code by Jeff Epler and Fredrik Lundh. :)

      Utilities needed to emulate Python's interactive interpreter.

# TODO: better STD* overrides
# TODO: interactive help

import sys
import traceback
import CanorusPython
import time
from threading import Thread
from codeop import CommandCompiler, compile_command

__all__ = ["InteractiveInterpreter", "InteractiveConsole", "interact",

def init(pluginDir, canorusInterface):
      print "Python CLI initialized"

def pycli(document, canorusInterface):

      sys.stdin = CanorusConsoleInterfaceIN(canorusInterface)
      sys.stdout = CanorusConsoleInterfaceOUT(canorusInterface, False)
      sys.stderr = CanorusConsoleInterfaceOUT(canorusInterface, True)

      interact("Canorus CLI initialized", sys.stdin.raw_input , {"CanorusPython":CanorusPython,"document":document})

00036 class CanorusConsoleInterfaceOUT:
      """Provides 'output' interface to canorus
      The class redirects STDOUT and STDERR to console in canorus

00042       def __init__(self, canorusInterface, stdErrMod):
            """Constructor. It takes a link to canorus consle as a parameter 
            self.canorusInterface = canorusInterface
            self.stdErrMod = stdErrMod
      def write(self, string):
            self.canorusInterface.bufferedOutput(string, self.stdErrMod)

00051 class CanorusConsoleInterfaceIN:
      """Provides 'input' interface to canorus
      The class redirects STDIN to console in canorus

00057       def __init__(self, canorusInterface):
            """Constructor. It takes a link to canorus consle as a parameter 
            self.canorusInterface = canorusInterface

      def readline(self):
            return self.canorusInterface.bufferedInput("") + '\n'

      def raw_input(self, prompt):
            return self.canorusInterface.bufferedInput(prompt)

def softspace(file, newvalue):
    oldvalue = 0
        oldvalue = file.softspace
    except AttributeError:
        file.softspace = newvalue
    except (AttributeError, TypeError):
        # "attribute-less object" or "read-only attributes"
    return oldvalue

00083 class InteractiveInterpreter:
    """Base class for InteractiveConsole.

    This class deals with parsing and interpreter state (the user's
    namespace); it doesn't deal with input buffering or prompting or
    input file naming (the filename is always passed in explicitly).


00092     def __init__(self, locals=None):

        The optional 'locals' argument specifies the dictionary in
        which code will be executed; it defaults to a newly created
        dictionary with key "__name__" set to "__console__" and key
        "__doc__" set to None.

        if locals is None:
            locals = {"__name__": "__console__", "__doc__": None}
        self.locals = locals
        self.compile = CommandCompiler()

00106     def runsource(self, source, filename="<input>", symbol="single"):
        """Compile and run some source in the interpreter.

        Arguments are as for compile_command().

        One several things can happen:

        1) The input is incorrect; compile_command() raised an
        exception (SyntaxError or OverflowError).  A syntax traceback
        will be printed by calling the showsyntaxerror() method.

        2) The input is incomplete, and more input is required;
        compile_command() returned None.  Nothing happens.

        3) The input is complete; compile_command() returned a code
        object.  The code is executed by calling self.runcode() (which
        also handles run-time exceptions, except for SystemExit).

        The return value is True in case 2, False in the other cases (unless
        an exception is raised).  The return value can be used to
        decide whether to use sys.ps1 or sys.ps2 to prompt the next

            code = self.compile(source, filename, symbol)
        except (OverflowError, SyntaxError, ValueError):
            # Case 1
            return False

        if code is None:
            # Case 2
            return True

        # Case 3
        return False

00145     def runcode(self, code):
        """Execute a code object.

        When an exception occurs, self.showtraceback() is called to
        display a traceback.  All exceptions are caught except
        SystemExit, which is reraised.

        A note about KeyboardInterrupt: this exception may occur
        elsewhere in this code, and may not always be caught.  The
        caller should be prepared to deal with it.

            exec code in self.locals
        except SystemExit:
            if softspace(sys.stdout, 0):

00167     def showsyntaxerror(self, filename=None):
        """Display the syntax error that just occurred.

        This doesn't display a stack trace because there isn't one.

        If a filename is given, it is stuffed in the exception instead
        of what was there before (because Python's parser always uses
        "<string>" when reading from a string).

        The output is written by self.write(), below.

        type, value, sys.last_traceback = sys.exc_info()
        sys.last_type = type
        sys.last_value = value
        if filename and type is SyntaxError:
            # Work hard to stuff the correct filename in the exception
                msg, (dummy_filename, lineno, offset, line) = value
                # Not the format we expect; leave it alone
                # Stuff in the right filename
                value = SyntaxError(msg, (filename, lineno, offset, line))
                sys.last_value = value
        list = traceback.format_exception_only(type, value)
        map(self.write, list)

00196     def showtraceback(self):
        """Display the exception that just occurred.

        We remove the first stack item because it is our own code.

        The output is written by self.write(), below.

            type, value, tb = sys.exc_info()
            sys.last_type = type
            sys.last_value = value
            sys.last_traceback = tb
            tblist = traceback.extract_tb(tb)
            del tblist[:1]
            list = traceback.format_list(tblist)
            if list:
                list.insert(0, "Traceback (most recent call last):\n")
            list[len(list):] = traceback.format_exception_only(type, value)
            tblist = tb = None
        map(self.write, list)

00219     def write(self, data):
        """Write a string.

        The base implementation writes to sys.stderr; a subclass may
        replace this with a different implementation.


00229 class InteractiveConsole(InteractiveInterpreter):
    """Closely emulate the behavior of the interactive Python interpreter.

    This class builds on InteractiveInterpreter and adds prompting
    using the familiar sys.ps1 and sys.ps2, and input buffering.


00237     def __init__(self, locals=None, filename="<console>"):

        The optional locals argument will be passed to the
        InteractiveInterpreter base class.

        The optional filename argument should specify the (file)name
        of the input stream; it will show up in tracebacks.

        InteractiveInterpreter.__init__(self, locals)
        self.filename = filename

00251     def resetbuffer(self):
        """Reset the input buffer."""
        self.buffer = []

00255     def interact(self, banner=None):
        """Closely emulate the interactive Python console.

        The optional banner argument specify the banner to print
        before the first interaction; by default it prints a banner
        similar to the one printed by the real Python interpreter,
        followed by the current class name in parentheses (so as not
        to confuse this with the real interpreter -- since it's so

        except AttributeError:
            sys.ps1 = ">>> "
        except AttributeError:
            sys.ps2 = "... "
        cprt = 'Type "help", "copyright", "credits" or "license" for more information.'
        if banner is None:
            self.write("Python %s on %s\n%s\n(%s)\n" %
                       (sys.version, sys.platform, cprt,
            self.write("%s\n" % str(banner))
        more = 0
        while 1:
                if more:
                    prompt = sys.ps2
                    prompt = sys.ps1
                    line = self.raw_input(prompt)
                except EOFError:
                    more = self.push(line)
            except KeyboardInterrupt:
                more = 0

00300     def push(self, line):
        """Push a line to the interpreter.

        The line should not have a trailing newline; it may have
        internal newlines.  The line is appended to a buffer and the
        interpreter's runsource() method is called with the
        concatenated contents of the buffer as source.  If this
        indicates that the command was executed or invalid, the buffer
        is reset; otherwise, the command is incomplete, and the buffer
        is left as it was after the line was appended.  The return
        value is 1 if more input is required, 0 if the line was dealt
        with in some way (this is the same as runsource()).

        source = "\n".join(self.buffer)
        more = self.runsource(source, self.filename)
        if not more:
        return more

00321     def raw_input(self, prompt=""):
        """Write a prompt and read a line.

        The returned line does not include the trailing newline.
        When the user enters the EOF key sequence, EOFError is raised.

        The base implementation uses the built-in function
        raw_input(); a subclass may replace this with a different

        return raw_input(prompt)

00335 def interact(banner=None, readfunc=None, local=None):
    """Closely emulate the interactive Python interpreter.

    This is a backwards compatible interface to the InteractiveConsole
    class.  When readfunc is not specified, it attempts to import the
    readline module to enable GNU readline if it is available.

    Arguments (all optional, all default to None):

    banner -- passed to InteractiveConsole.interact()
    readfunc -- if not None, replaces InteractiveConsole.raw_input()
    local -- passed to InteractiveInterpreter.__init__()

    console = InteractiveConsole(local)
    if readfunc is not None:
        console.raw_input = readfunc
            import readline
        except ImportError:

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