synchronize with editor patch

IPython/Debugger.py

@@ -1,517 +1,529 b''
 # -*- coding: utf-8 -*-
 """
 Pdb debugger class.
 
 Modified from the standard pdb.Pdb class to avoid including readline, so that
 the command line completion of other programs which include this isn't
 damaged.
 
 In the future, this class will be expanded with improvements over the standard
 pdb.
 
 The code in this file is mainly lifted out of cmd.py in Python 2.2, with minor
 changes. Licensing should therefore be under the standard Python terms.  For
 details on the PSF (Python Software Foundation) standard license, see:
 
 http://www.python.org/2.2.3/license.html
 
 $Id: Debugger.py 2913 2007-12-31 12:42:14Z vivainio $"""
 
 #*****************************************************************************
 #
 #       This file is licensed under the PSF license.
 #
 #       Copyright (C) 2001 Python Software Foundation, www.python.org
 #       Copyright (C) 2005-2006 Fernando Perez. <[e-mail]>
 #
 #
 #*****************************************************************************
 
 from IPython import Release
 __author__  = '%s <%s>' % Release.authors['Fernando']
 __license__ = 'Python'
 
 import bdb
 import cmd
 import linecache
 import os
 import sys
 
 from IPython import PyColorize, ColorANSI, ipapi
 from IPython.genutils import Term
 from IPython.excolors import ExceptionColors
 
 # See if we can use pydb.
 has_pydb = False
 prompt = 'ipdb> '
 #We have to check this directly from sys.argv, config struct not yet available
 if '-pydb' in sys.argv:
     try:        
         import pydb
         if hasattr(pydb.pydb, "runl") and pydb.version>'1.17':
             # Version 1.17 is broken, and that's what ships with Ubuntu Edgy, so we
             # better protect against it.
             has_pydb = True
     except ImportError:
         print "Pydb (http://bashdb.sourceforge.net/pydb/) does not seem to be available"
 
 if has_pydb:
     from pydb import Pdb as OldPdb
     #print "Using pydb for %run -d and post-mortem" #dbg
     prompt = 'ipydb> '
 else:
     from pdb import Pdb as OldPdb
 
 # Allow the set_trace code to operate outside of an ipython instance, even if
 # it does so with some limitations.  The rest of this support is implemented in
 # the Tracer constructor.
 def BdbQuit_excepthook(et,ev,tb):
     if et==bdb.BdbQuit:
         print 'Exiting Debugger.'
     else:
         BdbQuit_excepthook.excepthook_ori(et,ev,tb)
 
 def BdbQuit_IPython_excepthook(self,et,ev,tb):
     print 'Exiting Debugger.'
 
 class Tracer(object):
     """Class for local debugging, similar to pdb.set_trace.
 
     Instances of this class, when called, behave like pdb.set_trace, but
     providing IPython's enhanced capabilities.
 
     This is implemented as a class which must be initialized in your own code
     and not as a standalone function because we need to detect at runtime
     whether IPython is already active or not.  That detection is done in the
     constructor, ensuring that this code plays nicely with a running IPython,
     while functioning acceptably (though with limitations) if outside of it.
     """
 
     def __init__(self,colors=None):
         """Create a local debugger instance.
 
         :Parameters:
 
           - `colors` (None): a string containing the name of the color scheme to
         use, it must be one of IPython's valid color schemes.  If not given, the
         function will default to the current IPython scheme when running inside
         IPython, and to 'NoColor' otherwise.
 
         Usage example:
 
         from IPython.Debugger import Tracer; debug_here = Tracer()
 
         ... later in your code
         debug_here()  # -> will open up the debugger at that point.
 
         Once the debugger activates, you can use all of its regular commands to
         step through code, set breakpoints, etc.  See the pdb documentation
         from the Python standard library for usage details.
         """
 
         global __IPYTHON__
         try:
             __IPYTHON__
         except NameError:
             # Outside of ipython, we set our own exception hook manually
             __IPYTHON__ = ipapi.get(True,False)
             BdbQuit_excepthook.excepthook_ori = sys.excepthook
             sys.excepthook = BdbQuit_excepthook
             def_colors = 'NoColor'
             try:
                 # Limited tab completion support
                 import rlcompleter,readline
                 readline.parse_and_bind('tab: complete')
             except ImportError:
                 pass
         else:
             # In ipython, we use its custom exception handler mechanism
             ip = ipapi.get()
             def_colors = ip.options.colors
             ip.set_custom_exc((bdb.BdbQuit,),BdbQuit_IPython_excepthook)
 
         if colors is None:
             colors = def_colors
         self.debugger = Pdb(colors)
 
     def __call__(self):
         """Starts an interactive debugger at the point where called.
 
         This is similar to the pdb.set_trace() function from the std lib, but
         using IPython's enhanced debugger."""
         
         self.debugger.set_trace(sys._getframe().f_back)
 
 def decorate_fn_with_doc(new_fn, old_fn, additional_text=""):
     """Make new_fn have old_fn's doc string. This is particularly useful
     for the do_... commands that hook into the help system.
     Adapted from from a comp.lang.python posting
     by Duncan Booth."""
     def wrapper(*args, **kw):
         return new_fn(*args, **kw)
     if old_fn.__doc__:
         wrapper.__doc__ = old_fn.__doc__ + additional_text
     return wrapper
 
 def _file_lines(fname):
     """Return the contents of a named file as a list of lines.
 
     This function never raises an IOError exception: if the file can't be
     read, it simply returns an empty list."""
 
     try:
         outfile = open(fname)
     except IOError:
         return []
     else:
         out = outfile.readlines()
         outfile.close()
         return out
 
 class Pdb(OldPdb):
     """Modified Pdb class, does not load readline."""
 
     if sys.version[:3] >= '2.5' or has_pydb:
         def __init__(self,color_scheme='NoColor',completekey=None,
                      stdin=None, stdout=None):
 
             # Parent constructor:
             if has_pydb and completekey is None:
                 OldPdb.__init__(self,stdin=stdin,stdout=Term.cout)
             else:
                 OldPdb.__init__(self,completekey,stdin,stdout)
                 
             self.prompt = prompt # The default prompt is '(Pdb)'
             
             # IPython changes...
             self.is_pydb = has_pydb
 
             if self.is_pydb:
 
                 # iplib.py's ipalias seems to want pdb's checkline
                 # which located in pydb.fn
                 import pydb.fns
                 self.checkline = lambda filename, lineno: \
                                  pydb.fns.checkline(self, filename, lineno)
 
                 self.curframe = None
                 self.do_restart = self.new_do_restart
 
                 self.old_all_completions = __IPYTHON__.Completer.all_completions
                 __IPYTHON__.Completer.all_completions=self.all_completions
 
                 self.do_list = decorate_fn_with_doc(self.list_command_pydb,
                                                     OldPdb.do_list)
                 self.do_l     = self.do_list
                 self.do_frame = decorate_fn_with_doc(self.new_do_frame,
                                                      OldPdb.do_frame)
 
             self.aliases = {}
 
             # Create color table: we copy the default one from the traceback
             # module and add a few attributes needed for debugging
             self.color_scheme_table = ExceptionColors.copy()
 
             # shorthands 
             C = ColorANSI.TermColors
             cst = self.color_scheme_table
 
             cst['NoColor'].colors.breakpoint_enabled = C.NoColor
             cst['NoColor'].colors.breakpoint_disabled = C.NoColor
 
             cst['Linux'].colors.breakpoint_enabled = C.LightRed
             cst['Linux'].colors.breakpoint_disabled = C.Red
 
             cst['LightBG'].colors.breakpoint_enabled = C.LightRed
             cst['LightBG'].colors.breakpoint_disabled = C.Red
 
             self.set_colors(color_scheme)
 
             # Add a python parser so we can syntax highlight source while
             # debugging.
             self.parser = PyColorize.Parser()
 
 
     else:
         # Ugly hack: for Python 2.3-2.4, we can't call the parent constructor,
         # because it binds readline and breaks tab-completion.  This means we
         # have to COPY the constructor here.
         def __init__(self,color_scheme='NoColor'):
             bdb.Bdb.__init__(self)
             cmd.Cmd.__init__(self,completekey=None) # don't load readline
             self.prompt = 'ipdb> ' # The default prompt is '(Pdb)'
             self.aliases = {}
 
             # These two lines are part of the py2.4 constructor, let's put them
             # unconditionally here as they won't cause any problems in 2.3.
             self.mainpyfile = ''
             self._wait_for_mainpyfile = 0
 
             # Read $HOME/.pdbrc and ./.pdbrc
             try:
                 self.rcLines = _file_lines(os.path.join(os.environ['HOME'],
                                                         ".pdbrc"))
             except KeyError:
                 self.rcLines = []
             self.rcLines.extend(_file_lines(".pdbrc"))
 
             # Create color table: we copy the default one from the traceback
             # module and add a few attributes needed for debugging
             ExceptionColors.set_active_scheme(color_scheme)
             self.color_scheme_table = ExceptionColors.copy()
 
             # shorthands 
             C = ColorANSI.TermColors
             cst = self.color_scheme_table
 
             cst['NoColor'].colors.breakpoint_enabled = C.NoColor
             cst['NoColor'].colors.breakpoint_disabled = C.NoColor
 
             cst['Linux'].colors.breakpoint_enabled = C.LightRed
             cst['Linux'].colors.breakpoint_disabled = C.Red
 
             cst['LightBG'].colors.breakpoint_enabled = C.LightRed
             cst['LightBG'].colors.breakpoint_disabled = C.Red
 
             self.set_colors(color_scheme)
 
             # Add a python parser so we can syntax highlight source while
             # debugging.
             self.parser = PyColorize.Parser()
         
     def set_colors(self, scheme):
         """Shorthand access to the color table scheme selector method."""
         self.color_scheme_table.set_active_scheme(scheme)
 
     def interaction(self, frame, traceback):
         __IPYTHON__.set_completer_frame(frame)
         OldPdb.interaction(self, frame, traceback)
 
     def new_do_up(self, arg):
         OldPdb.do_up(self, arg)
         __IPYTHON__.set_completer_frame(self.curframe)
     do_u = do_up = decorate_fn_with_doc(new_do_up, OldPdb.do_up)
 
     def new_do_down(self, arg):
         OldPdb.do_down(self, arg)
         __IPYTHON__.set_completer_frame(self.curframe)
 
     do_d = do_down = decorate_fn_with_doc(new_do_down, OldPdb.do_down)
 
     def new_do_frame(self, arg):
         OldPdb.do_frame(self, arg)
         __IPYTHON__.set_completer_frame(self.curframe)
 
     def new_do_quit(self, arg):
         
         if hasattr(self, 'old_all_completions'):
             __IPYTHON__.Completer.all_completions=self.old_all_completions
         
         
         return OldPdb.do_quit(self, arg)
 
     do_q = do_quit = decorate_fn_with_doc(new_do_quit, OldPdb.do_quit)
 
     def new_do_restart(self, arg):
         """Restart command. In the context of ipython this is exactly the same
         thing as 'quit'."""
         self.msg("Restart doesn't make sense here. Using 'quit' instead.")
         return self.do_quit(arg)
 
     def postloop(self):
         __IPYTHON__.set_completer_frame(None)
 
     def print_stack_trace(self):
         try:
             for frame_lineno in self.stack:
                 self.print_stack_entry(frame_lineno, context = 5)
         except KeyboardInterrupt:
             pass
 
     def print_stack_entry(self,frame_lineno,prompt_prefix='\n-> ',
                           context = 3):
         #frame, lineno = frame_lineno
         print >>Term.cout, self.format_stack_entry(frame_lineno, '', context)
 
+        # vds: >>
+        frame, lineno = frame_lineno
+        filename = frame.f_code.co_filename
+        __IPYTHON__.hooks.synchronize_with_editor(filename, lineno, 0)
+        # vds: <<
+
     def format_stack_entry(self, frame_lineno, lprefix=': ', context = 3):
         import linecache, repr
         
         ret = []
         
         Colors = self.color_scheme_table.active_colors
         ColorsNormal = Colors.Normal
         tpl_link = '%s%%s%s' % (Colors.filenameEm, ColorsNormal)
         tpl_call = '%s%%s%s%%s%s' % (Colors.vName, Colors.valEm, ColorsNormal)
         tpl_line = '%%s%s%%s %s%%s' % (Colors.lineno, ColorsNormal)
         tpl_line_em = '%%s%s%%s %s%%s%s' % (Colors.linenoEm, Colors.line,
                                             ColorsNormal)
         
         frame, lineno = frame_lineno
         
         return_value = ''
         if '__return__' in frame.f_locals:
             rv = frame.f_locals['__return__']
             #return_value += '->'
             return_value += repr.repr(rv) + '\n'
         ret.append(return_value)
 
         #s = filename + '(' + `lineno` + ')'
         filename = self.canonic(frame.f_code.co_filename)
         link = tpl_link % filename
         
         if frame.f_code.co_name:
             func = frame.f_code.co_name
         else:
             func = "<lambda>"
             
         call = ''
         if func != '?':         
             if '__args__' in frame.f_locals:
                 args = repr.repr(frame.f_locals['__args__'])
             else:
                 args = '()'
             call = tpl_call % (func, args)
 
         # The level info should be generated in the same format pdb uses, to
         # avoid breaking the pdbtrack functionality of python-mode in *emacs.
         if frame is self.curframe:
             ret.append('> ')
         else:
             ret.append('  ')
         ret.append('%s(%s)%s\n' % (link,lineno,call))
             
         start = lineno - 1 - context//2
         lines = linecache.getlines(filename)
         start = max(start, 0)
         start = min(start, len(lines) - context)
         lines = lines[start : start + context]
             
         for i,line in enumerate(lines):
             show_arrow = (start + 1 + i == lineno)
             linetpl = (frame is self.curframe or show_arrow) \
                       and tpl_line_em \
                       or tpl_line
             ret.append(self.__format_line(linetpl, filename,
                                           start + 1 + i, line,
                                           arrow = show_arrow) )
 
         return ''.join(ret)
 
     def __format_line(self, tpl_line, filename, lineno, line, arrow = False):
         bp_mark = ""
         bp_mark_color = ""
 
         scheme = self.color_scheme_table.active_scheme_name
         new_line, err = self.parser.format2(line, 'str', scheme)
         if not err: line = new_line
 
         bp = None
         if lineno in self.get_file_breaks(filename):
             bps = self.get_breaks(filename, lineno)
             bp = bps[-1]
         
         if bp:
             Colors = self.color_scheme_table.active_colors
             bp_mark = str(bp.number)
             bp_mark_color = Colors.breakpoint_enabled
             if not bp.enabled:
                 bp_mark_color = Colors.breakpoint_disabled
 
         numbers_width = 7
         if arrow:
             # This is the line with the error
             pad = numbers_width - len(str(lineno)) - len(bp_mark)
             if pad >= 3:
                 marker = '-'*(pad-3) + '-> '
             elif pad == 2:
                  marker = '> '
             elif pad == 1:
                  marker = '>'
             else:
                  marker = ''
             num = '%s%s' % (marker, str(lineno))
             line = tpl_line % (bp_mark_color + bp_mark, num, line)
         else:
             num = '%*s' % (numbers_width - len(bp_mark), str(lineno))
             line = tpl_line % (bp_mark_color + bp_mark, num, line)
             
         return line
 
     def list_command_pydb(self, arg):
         """List command to use if we have a newer pydb installed"""
         filename, first, last = OldPdb.parse_list_cmd(self, arg)
         if filename is not None:
             self.print_list_lines(filename, first, last)
         
     def print_list_lines(self, filename, first, last):
         """The printing (as opposed to the parsing part of a 'list'
         command."""
         try:
             Colors = self.color_scheme_table.active_colors
             ColorsNormal = Colors.Normal
             tpl_line = '%%s%s%%s %s%%s' % (Colors.lineno, ColorsNormal)
             tpl_line_em = '%%s%s%%s %s%%s%s' % (Colors.linenoEm, Colors.line, ColorsNormal)
             src = []
             for lineno in range(first, last+1):
                 line = linecache.getline(filename, lineno)
                 if not line:
                     break
 
                 if lineno == self.curframe.f_lineno:
                     line = self.__format_line(tpl_line_em, filename, lineno, line, arrow = True)
                 else:
                     line = self.__format_line(tpl_line, filename, lineno, line, arrow = False)
 
                 src.append(line)
                 self.lineno = lineno
 
             print >>Term.cout, ''.join(src)
 
         except KeyboardInterrupt:
             pass
 
     def do_list(self, arg):
         self.lastcmd = 'list'
         last = None
         if arg:
             try:
                 x = eval(arg, {}, {})
                 if type(x) == type(()):
                     first, last = x
                     first = int(first)
                     last = int(last)
                     if last < first:
                         # Assume it's a count
                         last = first + last
                 else:
                     first = max(1, int(x) - 5)
             except:
                 print '*** Error in argument:', `arg`
                 return
         elif self.lineno is None:
             first = max(1, self.curframe.f_lineno - 5)
         else:
             first = self.lineno + 1
         if last is None:
             last = first + 10
         self.print_list_lines(self.curframe.f_code.co_filename, first, last)
 
+        # vds: >>
+        lineno = first
+        filename = self.curframe.f_code.co_filename
+        __IPYTHON__.hooks.synchronize_with_editor(filename, lineno, 0)
+        # vds: <<
+
     do_l = do_list
 
     def do_pdef(self, arg):
         """The debugger interface to magic_pdef"""
         namespaces = [('Locals', self.curframe.f_locals),
                       ('Globals', self.curframe.f_globals)]
         __IPYTHON__.magic_pdef(arg, namespaces=namespaces)
 
     def do_pdoc(self, arg):
         """The debugger interface to magic_pdoc"""
         namespaces = [('Locals', self.curframe.f_locals),
                       ('Globals', self.curframe.f_globals)]
         __IPYTHON__.magic_pdoc(arg, namespaces=namespaces)
 
     def do_pinfo(self, arg):
         """The debugger equivalant of ?obj"""
         namespaces = [('Locals', self.curframe.f_locals),
                       ('Globals', self.curframe.f_globals)]
         __IPYTHON__.magic_pinfo("pinfo %s" % arg, namespaces=namespaces)

IPython/hooks.py

@@ -1,243 +1,249 b''
 """hooks for IPython.
 
 In Python, it is possible to overwrite any method of any object if you really
 want to.  But IPython exposes a few 'hooks', methods which are _designed_ to
 be overwritten by users for customization purposes.  This module defines the
 default versions of all such hooks, which get used by IPython if not
 overridden by the user.
 
 hooks are simple functions, but they should be declared with 'self' as their
 first argument, because when activated they are registered into IPython as
 instance methods.  The self argument will be the IPython running instance
 itself, so hooks have full access to the entire IPython object.
 
 If you wish to define a new hook and activate it, you need to put the
 necessary code into a python file which can be either imported or execfile()'d
 from within your ipythonrc configuration.
 
 For example, suppose that you have a module called 'myiphooks' in your
 PYTHONPATH, which contains the following definition:
 
 import os
 import IPython.ipapi
 ip = IPython.ipapi.get()
 
 def calljed(self,filename, linenum):
     "My editor hook calls the jed editor directly."
     print "Calling my own editor, jed ..."
     os.system('jed +%d %s' % (linenum,filename))
 
 ip.set_hook('editor', calljed)
 
 You can then enable the functionality by doing 'import myiphooks'
 somewhere in your configuration files or ipython command line.
 
 $Id: hooks.py 2998 2008-01-31 10:06:04Z vivainio $"""
 
 #*****************************************************************************
 #       Copyright (C) 2005 Fernando Perez. <[e-mail]>
 #
 #  Distributed under the terms of the BSD License.  The full license is in
 #  the file COPYING, distributed as part of this software.
 #*****************************************************************************
 
 from IPython import Release
 from IPython import ipapi
 __author__  = '%s <%s>' % Release.authors['Fernando']
 __license__ = Release.license
 __version__ = Release.version
 
 import os,bisect
 from genutils import Term,shell
 from pprint import PrettyPrinter
 
 # List here all the default hooks.  For now it's just the editor functions
 # but over time we'll move here all the public API for user-accessible things.
-__all__ = ['editor', 'fix_error_editor', 'result_display',
+# vds: >>
+__all__ = ['editor', 'fix_error_editor', 'synchronize_with_editor', 'result_display',
            'input_prefilter', 'shutdown_hook', 'late_startup_hook',
            'generate_prompt', 'generate_output_prompt','shell_hook',
            'show_in_pager','pre_prompt_hook', 'pre_runcode_hook']
+# vds: <<
 
 pformat = PrettyPrinter().pformat
 
 def editor(self,filename, linenum=None):
     """Open the default editor at the given filename and linenumber.
 
     This is IPython's default editor hook, you can use it as an example to
     write your own modified one.  To set your own editor function as the
     new editor hook, call ip.set_hook('editor',yourfunc)."""
 
     # IPython configures a default editor at startup by reading $EDITOR from
     # the environment, and falling back on vi (unix) or notepad (win32).
     editor = self.rc.editor
     
     # marker for at which line to open the file (for existing objects)
     if linenum is None or editor=='notepad':
         linemark = ''
     else:
         linemark = '+%d' % int(linenum)
     
     # Enclose in quotes if necessary and legal
     if ' ' in editor and os.path.isfile(editor) and editor[0] != '"':
         editor = '"%s"' % editor
         
     # Call the actual editor
     os.system('%s %s %s' % (editor,linemark,filename))
 
 import tempfile
 def fix_error_editor(self,filename,linenum,column,msg):
     """Open the editor at the given filename, linenumber, column and 
     show an error message. This is used for correcting syntax errors.
     The current implementation only has special support for the VIM editor,
     and falls back on the 'editor' hook if VIM is not used.
 
     Call ip.set_hook('fix_error_editor',youfunc) to use your own function,
     """
     def vim_quickfix_file():
         t = tempfile.NamedTemporaryFile()
         t.write('%s:%d:%d:%s\n' % (filename,linenum,column,msg))
         t.flush()
         return t
     if os.path.basename(self.rc.editor) != 'vim':
         self.hooks.editor(filename,linenum)
         return
     t = vim_quickfix_file()
     try:
         os.system('vim --cmd "set errorformat=%f:%l:%c:%m" -q ' + t.name)
     finally:
         t.close()
 
+# vds: >>
+def synchronize_with_editor(self, filename, linenum, column):
+	pass
+# vds: <<
 
 class CommandChainDispatcher:
     """ Dispatch calls to a chain of commands until some func can handle it
     
     Usage: instantiate, execute "add" to add commands (with optional
     priority), execute normally via f() calling mechanism.
     
     """
     def __init__(self,commands=None):
         if commands is None:
             self.chain = []
         else:
             self.chain = commands
             
             
     def __call__(self,*args, **kw):
         """ Command chain is called just like normal func. 
         
         This will call all funcs in chain with the same args as were given to this
         function, and return the result of first func that didn't raise
         TryNext """
         
         for prio,cmd in self.chain:
             #print "prio",prio,"cmd",cmd #dbg
             try:
                 ret = cmd(*args, **kw)
                 return ret
             except ipapi.TryNext, exc:
                 if exc.args or exc.kwargs:
                     args = exc.args
                     kw = exc.kwargs
         # if no function will accept it, raise TryNext up to the caller
         raise ipapi.TryNext
                 
     def __str__(self):
         return str(self.chain)
     
     def add(self, func, priority=0):
         """ Add a func to the cmd chain with given priority """
         bisect.insort(self.chain,(priority,func))
 
     def __iter__(self):
         """ Return all objects in chain.
         
         Handy if the objects are not callable.
         """
         return iter(self.chain)
     
 def result_display(self,arg):
     """ Default display hook.
     
     Called for displaying the result to the user.
     """
     
     if self.rc.pprint:
         out = pformat(arg)
         if '\n' in out:
             # So that multi-line strings line up with the left column of
             # the screen, instead of having the output prompt mess up
             # their first line.                
             Term.cout.write('\n')
         print >>Term.cout, out
     else:
         # By default, the interactive prompt uses repr() to display results,
         # so we should honor this.  Users who'd rather use a different
         # mechanism can easily override this hook.
         print >>Term.cout, repr(arg)
     # the default display hook doesn't manipulate the value to put in history
     return None 
 
 def input_prefilter(self,line):     
     """ Default input prefilter
     
     This returns the line as unchanged, so that the interpreter
     knows that nothing was done and proceeds with "classic" prefiltering
     (%magics, !shell commands etc.). 
     
     Note that leading whitespace is not passed to this hook. Prefilter
     can't alter indentation.
     
     """
     #print "attempt to rewrite",line #dbg
     return line
 
 def shutdown_hook(self):
     """ default shutdown hook
     
     Typically, shotdown hooks should raise TryNext so all shutdown ops are done
     """
     
     #print "default shutdown hook ok" # dbg
     return
 
 def late_startup_hook(self):
     """ Executed after ipython has been constructed and configured 
     
     """
     #print "default startup hook ok" # dbg
 
 def generate_prompt(self, is_continuation):
     """ calculate and return a string with the prompt to display """
     ip = self.api
     if is_continuation:
         return str(ip.IP.outputcache.prompt2)
     return str(ip.IP.outputcache.prompt1)
 
 def generate_output_prompt(self):
     ip = self.api
     return str(ip.IP.outputcache.prompt_out)
 
 def shell_hook(self,cmd):
     """ Run system/shell command a'la os.system() """
 
     shell(cmd, header=self.rc.system_header, verbose=self.rc.system_verbose)
 
 def show_in_pager(self,s):
     """ Run a string through pager """
     # raising TryNext here will use the default paging functionality
     raise ipapi.TryNext
 
 def pre_prompt_hook(self):
     """ Run before displaying the next prompt
     
     Use this e.g. to display output from asynchronous operations (in order 
     to not mess up text entry)   
     """
     
     return None
 
 def pre_runcode_hook(self):
     """ Executed before running the (prefiltered) code in IPython """
     return None
     
 

IPython/ultraTB.py

@@ -1,1045 +1,1059 b''
 # -*- coding: utf-8 -*-
 """
 ultraTB.py -- Spice up your tracebacks!
 
 * ColorTB
 I've always found it a bit hard to visually parse tracebacks in Python.  The
 ColorTB class is a solution to that problem.  It colors the different parts of a
 traceback in a manner similar to what you would expect from a syntax-highlighting
 text editor.
 
 Installation instructions for ColorTB:
     import sys,ultraTB
     sys.excepthook = ultraTB.ColorTB()
 
 * VerboseTB  
 I've also included a port of Ka-Ping Yee's "cgitb.py" that produces all kinds
 of useful info when a traceback occurs.  Ping originally had it spit out HTML
 and intended it for CGI programmers, but why should they have all the fun?  I
 altered it to spit out colored text to the terminal.  It's a bit overwhelming,
 but kind of neat, and maybe useful for long-running programs that you believe
 are bug-free.  If a crash *does* occur in that type of program you want details.
 Give it a shot--you'll love it or you'll hate it.
 
 Note:
 
   The Verbose mode prints the variables currently visible where the exception
   happened (shortening their strings if too long). This can potentially be
   very slow, if you happen to have a huge data structure whose string
   representation is complex to compute. Your computer may appear to freeze for
   a while with cpu usage at 100%. If this occurs, you can cancel the traceback
   with Ctrl-C (maybe hitting it more than once).
 
   If you encounter this kind of situation often, you may want to use the
   Verbose_novars mode instead of the regular Verbose, which avoids formatting
   variables (but otherwise includes the information and context given by
   Verbose).
   
 
 Installation instructions for ColorTB:
     import sys,ultraTB
     sys.excepthook = ultraTB.VerboseTB()
 
 Note:  Much of the code in this module was lifted verbatim from the standard
 library module 'traceback.py' and Ka-Ping Yee's 'cgitb.py'.
 
 * Color schemes
 The colors are defined in the class TBTools through the use of the
 ColorSchemeTable class. Currently the following exist:
 
   - NoColor: allows all of this module to be used in any terminal (the color
   escapes are just dummy blank strings).
 
   - Linux: is meant to look good in a terminal like the Linux console (black
   or very dark background).
 
   - LightBG: similar to Linux but swaps dark/light colors to be more readable
   in light background terminals.
 
 You can implement other color schemes easily, the syntax is fairly
 self-explanatory. Please send back new schemes you develop to the author for
 possible inclusion in future releases.
 
 $Id: ultraTB.py 2908 2007-12-30 21:07:46Z vivainio $"""
 
 #*****************************************************************************
 #       Copyright (C) 2001 Nathaniel Gray <[e-mail]>
 #       Copyright (C) 2001-2004 Fernando Perez <[e-mail]>
 #
 #  Distributed under the terms of the BSD License.  The full license is in
 #  the file COPYING, distributed as part of this software.
 #*****************************************************************************
 
 from IPython import Release
 __author__  = '%s <%s>\n%s <%s>' % (Release.authors['Nathan']+
                                     Release.authors['Fernando'])
 __license__ = Release.license
 
 # Required modules
 import inspect
 import keyword
 import linecache
 import os
 import pydoc
 import re
 import string
 import sys
 import time
 import tokenize
 import traceback
 import types
 
 # For purposes of monkeypatching inspect to fix a bug in it.
 from inspect import getsourcefile, getfile, getmodule,\
      ismodule,  isclass, ismethod, isfunction, istraceback, isframe, iscode
 
 
 # IPython's own modules
 # Modified pdb which doesn't damage IPython's readline handling
 from IPython import Debugger, PyColorize
 from IPython.ipstruct import Struct
 from IPython.excolors import ExceptionColors
 from IPython.genutils import Term,uniq_stable,error,info
 
 # Globals
 # amount of space to put line numbers before verbose tracebacks
 INDENT_SIZE = 8
 
 # Default color scheme.  This is used, for example, by the traceback
 # formatter.  When running in an actual IPython instance, the user's rc.colors
 # value is used, but havinga module global makes this functionality available
 # to users of ultraTB who are NOT running inside ipython.
 DEFAULT_SCHEME = 'NoColor'
 
 #---------------------------------------------------------------------------
 # Code begins
 
 # Utility functions
 def inspect_error():
     """Print a message about internal inspect errors.
 
     These are unfortunately quite common."""
     
     error('Internal Python error in the inspect module.\n'
           'Below is the traceback from this internal error.\n')
 
 
 def findsource(object):
     """Return the entire source file and starting line number for an object.
 
     The argument may be a module, class, method, function, traceback, frame,
     or code object.  The source code is returned as a list of all the lines
     in the file and the line number indexes a line in that list.  An IOError
     is raised if the source code cannot be retrieved.
 
     FIXED version with which we monkeypatch the stdlib to work around a bug."""
 
     file = getsourcefile(object) or getfile(object)
     # If the object is a frame, then trying to get the globals dict from its
     # module won't work. Instead, the frame object itself has the globals
     # dictionary.
     globals_dict = None
     if inspect.isframe(object):
         # XXX: can this ever be false?
         globals_dict = object.f_globals
     else:
         module = getmodule(object, file)
         if module:
             globals_dict = module.__dict__
     lines = linecache.getlines(file, globals_dict)
     if not lines:
         raise IOError('could not get source code')
 
     if ismodule(object):
         return lines, 0
 
     if isclass(object):
         name = object.__name__
         pat = re.compile(r'^(\s*)class\s*' + name + r'\b')
         # make some effort to find the best matching class definition:
         # use the one with the least indentation, which is the one
         # that's most probably not inside a function definition.
         candidates = []
         for i in range(len(lines)):
             match = pat.match(lines[i])
             if match:
                 # if it's at toplevel, it's already the best one
                 if lines[i][0] == 'c':
                     return lines, i
                 # else add whitespace to candidate list
                 candidates.append((match.group(1), i))
         if candidates:
             # this will sort by whitespace, and by line number,
             # less whitespace first
             candidates.sort()
             return lines, candidates[0][1]
         else:
             raise IOError('could not find class definition')
 
     if ismethod(object):
         object = object.im_func
     if isfunction(object):
         object = object.func_code
     if istraceback(object):
         object = object.tb_frame
     if isframe(object):
         object = object.f_code
     if iscode(object):
         if not hasattr(object, 'co_firstlineno'):
             raise IOError('could not find function definition')
         pat = re.compile(r'^(\s*def\s)|(.*(?<!\w)lambda(:|\s))|^(\s*@)')
         pmatch = pat.match
         # fperez - fix: sometimes, co_firstlineno can give a number larger than
         # the length of lines, which causes an error.  Safeguard against that.
         lnum = min(object.co_firstlineno,len(lines))-1
         while lnum > 0:
             if pmatch(lines[lnum]): break
             lnum -= 1
  
         return lines, lnum
     raise IOError('could not find code object')
 
 # Monkeypatch inspect to apply our bugfix.  This code only works with py25
 if sys.version_info[:2] >= (2,5):
     inspect.findsource = findsource
 
 def fix_frame_records_filenames(records):
     """Try to fix the filenames in each record from inspect.getinnerframes().
 
     Particularly, modules loaded from within zip files have useless filenames
     attached to their code object, and inspect.getinnerframes() just uses it.
     """
     fixed_records = []
     for frame, filename, line_no, func_name, lines, index in records:
         # Look inside the frame's globals dictionary for __file__, which should
         # be better.
         better_fn = frame.f_globals.get('__file__', None)
         if isinstance(better_fn, str):
             # Check the type just in case someone did something weird with
             # __file__. It might also be None if the error occurred during
             # import.
             filename = better_fn
         fixed_records.append((frame, filename, line_no, func_name, lines, index))
     return fixed_records
 
 
 def _fixed_getinnerframes(etb, context=1,tb_offset=0):
     import linecache
     LNUM_POS, LINES_POS, INDEX_POS =  2, 4, 5
 
     records  = fix_frame_records_filenames(inspect.getinnerframes(etb, context))
 
     # If the error is at the console, don't build any context, since it would
     # otherwise produce 5 blank lines printed out (there is no file at the
     # console)
     rec_check = records[tb_offset:]
     try:
         rname = rec_check[0][1]
         if rname == '<ipython console>' or rname.endswith('<string>'):
             return rec_check
     except IndexError:
         pass
 
     aux = traceback.extract_tb(etb)
     assert len(records) == len(aux)
     for i, (file, lnum, _, _) in zip(range(len(records)), aux):
         maybeStart = lnum-1 - context//2
         start =  max(maybeStart, 0)
         end   = start + context
         lines = linecache.getlines(file)[start:end]
         # pad with empty lines if necessary
         if maybeStart < 0:
             lines = (['\n'] * -maybeStart) + lines
         if len(lines) < context:
             lines += ['\n'] * (context - len(lines))
         buf = list(records[i])
         buf[LNUM_POS] = lnum
         buf[INDEX_POS] = lnum - 1 - start
         buf[LINES_POS] = lines
         records[i] = tuple(buf)
     return records[tb_offset:]
 
 # Helper function -- largely belongs to VerboseTB, but we need the same
 # functionality to produce a pseudo verbose TB for SyntaxErrors, so that they
 # can be recognized properly by ipython.el's py-traceback-line-re
 # (SyntaxErrors have to be treated specially because they have no traceback)
 
 _parser = PyColorize.Parser()
     
 def _formatTracebackLines(lnum, index, lines, Colors, lvals=None,scheme=None):
     numbers_width = INDENT_SIZE - 1
     res = []
     i = lnum - index
 
     # This lets us get fully syntax-highlighted tracebacks.
     if scheme is None:
         try:
             scheme = __IPYTHON__.rc.colors
         except:
             scheme = DEFAULT_SCHEME
     _line_format = _parser.format2
 
     for line in lines:
         new_line, err = _line_format(line,'str',scheme)
         if not err: line = new_line
         
         if i == lnum:
             # This is the line with the error
             pad = numbers_width - len(str(i))
             if pad >= 3:
                 marker = '-'*(pad-3) + '-> '
             elif pad == 2:
                 marker = '> '
             elif pad == 1:
                 marker = '>'
             else:
                 marker = ''
             num = marker + str(i)
             line = '%s%s%s %s%s' %(Colors.linenoEm, num, 
                                    Colors.line, line, Colors.Normal)
         else:
             num = '%*s' % (numbers_width,i)
             line = '%s%s%s %s' %(Colors.lineno, num, 
                                  Colors.Normal, line)
 
         res.append(line)
         if lvals and i == lnum:
             res.append(lvals + '\n')
         i = i + 1
     return res
 
 
 #---------------------------------------------------------------------------
 # Module classes
 class TBTools:
     """Basic tools used by all traceback printer classes."""
 
     def __init__(self,color_scheme = 'NoColor',call_pdb=False):
         # Whether to call the interactive pdb debugger after printing
         # tracebacks or not
         self.call_pdb = call_pdb
 
         # Create color table
         self.color_scheme_table = ExceptionColors 
 
         self.set_colors(color_scheme)
         self.old_scheme = color_scheme  # save initial value for toggles
 
         if call_pdb:
             self.pdb = Debugger.Pdb(self.color_scheme_table.active_scheme_name)
         else:
             self.pdb = None
 
     def set_colors(self,*args,**kw):
         """Shorthand access to the color table scheme selector method."""
 
         # Set own color table
         self.color_scheme_table.set_active_scheme(*args,**kw)
         # for convenience, set Colors to the active scheme
         self.Colors = self.color_scheme_table.active_colors
         # Also set colors of debugger
         if hasattr(self,'pdb') and self.pdb is not None:
             self.pdb.set_colors(*args,**kw)
 
     def color_toggle(self):
         """Toggle between the currently active color scheme and NoColor."""
         
         if self.color_scheme_table.active_scheme_name == 'NoColor':
             self.color_scheme_table.set_active_scheme(self.old_scheme)
             self.Colors = self.color_scheme_table.active_colors
         else:
             self.old_scheme = self.color_scheme_table.active_scheme_name
             self.color_scheme_table.set_active_scheme('NoColor')
             self.Colors = self.color_scheme_table.active_colors
 
 #---------------------------------------------------------------------------
 class ListTB(TBTools):
     """Print traceback information from a traceback list, with optional color.
         
     Calling: requires 3 arguments:
       (etype, evalue, elist)
     as would be obtained by:
       etype, evalue, tb = sys.exc_info()
       if tb:
         elist = traceback.extract_tb(tb)
       else:
         elist = None
 
     It can thus be used by programs which need to process the traceback before
     printing (such as console replacements based on the code module from the
     standard library).
 
     Because they are meant to be called without a full traceback (only a
     list), instances of this class can't call the interactive pdb debugger."""
 
     def __init__(self,color_scheme = 'NoColor'):
         TBTools.__init__(self,color_scheme = color_scheme,call_pdb=0)
         
     def __call__(self, etype, value, elist):
         Term.cout.flush()
         print >> Term.cerr, self.text(etype,value,elist)
         Term.cerr.flush()
 
     def text(self,etype, value, elist,context=5):
         """Return a color formatted string with the traceback info."""
 
         Colors = self.Colors
         out_string = ['%s%s%s\n' % (Colors.topline,'-'*60,Colors.Normal)]
         if elist:
             out_string.append('Traceback %s(most recent call last)%s:' % \
                                 (Colors.normalEm, Colors.Normal) + '\n')
             out_string.extend(self._format_list(elist))
         lines = self._format_exception_only(etype, value)
         for line in lines[:-1]:
             out_string.append(" "+line)
         out_string.append(lines[-1])
         return ''.join(out_string)
 
     def _format_list(self, extracted_list):
         """Format a list of traceback entry tuples for printing.
 
         Given a list of tuples as returned by extract_tb() or
         extract_stack(), return a list of strings ready for printing.
         Each string in the resulting list corresponds to the item with the
         same index in the argument list.  Each string ends in a newline;
         the strings may contain internal newlines as well, for those items
         whose source text line is not None.
         
         Lifted almost verbatim from traceback.py
         """
 
         Colors = self.Colors
         list = []
         for filename, lineno, name, line in extracted_list[:-1]:
             item = '  File %s"%s"%s, line %s%d%s, in %s%s%s\n' % \
                     (Colors.filename, filename, Colors.Normal, 
                      Colors.lineno, lineno, Colors.Normal,
                      Colors.name, name, Colors.Normal)
             if line:
                 item = item + '    %s\n' % line.strip()
             list.append(item)
         # Emphasize the last entry
         filename, lineno, name, line = extracted_list[-1]
         item = '%s  File %s"%s"%s, line %s%d%s, in %s%s%s%s\n' % \
                 (Colors.normalEm,
                  Colors.filenameEm, filename, Colors.normalEm,
                  Colors.linenoEm, lineno, Colors.normalEm,
                  Colors.nameEm, name, Colors.normalEm,
                  Colors.Normal)
         if line:
             item = item + '%s    %s%s\n' % (Colors.line, line.strip(),
                                             Colors.Normal)
         list.append(item)
         return list
         
     def _format_exception_only(self, etype, value):
         """Format the exception part of a traceback.
 
         The arguments are the exception type and value such as given by
         sys.exc_info()[:2]. The return value is a list of strings, each ending
         in a newline.  Normally, the list contains a single string; however,
         for SyntaxError exceptions, it contains several lines that (when
         printed) display detailed information about where the syntax error
         occurred.  The message indicating which exception occurred is the
         always last string in the list.
         
         Also lifted nearly verbatim from traceback.py
         """
         
         Colors = self.Colors
         list = []
         try:
             stype = Colors.excName + etype.__name__ + Colors.Normal
         except AttributeError:
             stype = etype  # String exceptions don't get special coloring
         if value is None:
             list.append( str(stype) + '\n')
         else:
             if etype is SyntaxError:
                 try:
                     msg, (filename, lineno, offset, line) = value
                 except:
                     pass
                 else:
                     #print 'filename is',filename  # dbg
                     if not filename: filename = "<string>"
                     list.append('%s  File %s"%s"%s, line %s%d%s\n' % \
                             (Colors.normalEm,
                              Colors.filenameEm, filename, Colors.normalEm,
                              Colors.linenoEm, lineno, Colors.Normal  ))
                     if line is not None:
                         i = 0
                         while i < len(line) and line[i].isspace():
                             i = i+1
                         list.append('%s    %s%s\n' % (Colors.line,
                                                       line.strip(), 
                                                       Colors.Normal))
                         if offset is not None:
                             s = '    '
                             for c in line[i:offset-1]:
                                 if c.isspace():
                                     s = s + c
                                 else:
                                     s = s + ' '
                             list.append('%s%s^%s\n' % (Colors.caret, s,
                                                        Colors.Normal) )
                         value = msg
             s = self._some_str(value)
             if s:
                 list.append('%s%s:%s %s\n' % (str(stype), Colors.excName,
                                               Colors.Normal, s))
             else:
                 list.append('%s\n' % str(stype))
+
+        # vds:>>
+        __IPYTHON__.hooks.synchronize_with_editor(filename, lineno, 0)
+        # vds:<<
+
         return list
 
     def _some_str(self, value):
         # Lifted from traceback.py
         try:
             return str(value)
         except:
             return '<unprintable %s object>' % type(value).__name__
 
 #----------------------------------------------------------------------------
 class VerboseTB(TBTools):
     """A port of Ka-Ping Yee's cgitb.py module that outputs color text instead
     of HTML.  Requires inspect and pydoc.  Crazy, man.
 
     Modified version which optionally strips the topmost entries from the
     traceback, to be used with alternate interpreters (because their own code
     would appear in the traceback)."""
 
     def __init__(self,color_scheme = 'Linux',tb_offset=0,long_header=0,
                  call_pdb = 0, include_vars=1):
         """Specify traceback offset, headers and color scheme.
 
         Define how many frames to drop from the tracebacks. Calling it with
         tb_offset=1 allows use of this handler in interpreters which will have
         their own code at the top of the traceback (VerboseTB will first
         remove that frame before printing the traceback info)."""
         TBTools.__init__(self,color_scheme=color_scheme,call_pdb=call_pdb)
         self.tb_offset = tb_offset
         self.long_header = long_header
         self.include_vars = include_vars
 
     def text(self, etype, evalue, etb, context=5):
         """Return a nice text document describing the traceback."""
 
         # some locals
         try:
             etype = etype.__name__
         except AttributeError:
             pass
         Colors        = self.Colors   # just a shorthand + quicker name lookup
         ColorsNormal  = Colors.Normal  # used a lot
         col_scheme    = self.color_scheme_table.active_scheme_name
         indent        = ' '*INDENT_SIZE
         em_normal     = '%s\n%s%s' % (Colors.valEm, indent,ColorsNormal)
         undefined     = '%sundefined%s' % (Colors.em, ColorsNormal)
         exc = '%s%s%s' % (Colors.excName,etype,ColorsNormal)
 
         # some internal-use functions
         def text_repr(value):
             """Hopefully pretty robust repr equivalent."""
             # this is pretty horrible but should always return *something*
             try:
                 return pydoc.text.repr(value)
             except KeyboardInterrupt:
                 raise
             except:
                 try:
                     return repr(value)
                 except KeyboardInterrupt:
                     raise
                 except:
                     try:
                         # all still in an except block so we catch
                         # getattr raising
                         name = getattr(value, '__name__', None)
                         if name:
                             # ick, recursion
                             return text_repr(name)
                         klass = getattr(value, '__class__', None)
                         if klass:
                             return '%s instance' % text_repr(klass)
                     except KeyboardInterrupt:
                         raise
                     except:
                         return 'UNRECOVERABLE REPR FAILURE'
         def eqrepr(value, repr=text_repr): return '=%s' % repr(value)
         def nullrepr(value, repr=text_repr): return ''
 
         # meat of the code begins
         try:
             etype = etype.__name__
         except AttributeError:
             pass
 
         if self.long_header:
             # Header with the exception type, python version, and date
             pyver = 'Python ' + string.split(sys.version)[0] + ': ' + sys.executable
             date = time.ctime(time.time())
             
             head = '%s%s%s\n%s%s%s\n%s' % (Colors.topline, '-'*75, ColorsNormal,
                                            exc, ' '*(75-len(str(etype))-len(pyver)),
                                            pyver, string.rjust(date, 75) )
             head += "\nA problem occured executing Python code.  Here is the sequence of function"\
                     "\ncalls leading up to the error, with the most recent (innermost) call last."
         else:
             # Simplified header
             head = '%s%s%s\n%s%s' % (Colors.topline, '-'*75, ColorsNormal,exc,
                                      string.rjust('Traceback (most recent call last)',
                                                   75 - len(str(etype)) ) )
         frames = []
         # Flush cache before calling inspect.  This helps alleviate some of the
         # problems with python 2.3's inspect.py.
         linecache.checkcache()
         # Drop topmost frames if requested
         try:
             # Try the default getinnerframes and Alex's: Alex's fixes some
             # problems, but it generates empty tracebacks for console errors
             # (5 blanks lines) where none should be returned.
             #records = inspect.getinnerframes(etb, context)[self.tb_offset:]
             #print 'python records:', records # dbg
             records = _fixed_getinnerframes(etb, context,self.tb_offset)
             #print 'alex   records:', records # dbg
         except:
 
             # FIXME: I've been getting many crash reports from python 2.3
             # users, traceable to inspect.py.  If I can find a small test-case
             # to reproduce this, I should either write a better workaround or
             # file a bug report against inspect (if that's the real problem).
             # So far, I haven't been able to find an isolated example to
             # reproduce the problem.
             inspect_error()
             traceback.print_exc(file=Term.cerr)
             info('\nUnfortunately, your original traceback can not be constructed.\n')
             return ''
 
         # build some color string templates outside these nested loops
         tpl_link       = '%s%%s%s' % (Colors.filenameEm,ColorsNormal)
         tpl_call       = 'in %s%%s%s%%s%s' % (Colors.vName, Colors.valEm,
                                               ColorsNormal)
         tpl_call_fail  = 'in %s%%s%s(***failed resolving arguments***)%s' % \
                          (Colors.vName, Colors.valEm, ColorsNormal)
         tpl_local_var  = '%s%%s%s' % (Colors.vName, ColorsNormal)
         tpl_global_var = '%sglobal%s %s%%s%s' % (Colors.em, ColorsNormal,
                                                  Colors.vName, ColorsNormal)
         tpl_name_val   = '%%s %s= %%s%s' % (Colors.valEm, ColorsNormal)
         tpl_line       = '%s%%s%s %%s' % (Colors.lineno, ColorsNormal)
         tpl_line_em    = '%s%%s%s %%s%s' % (Colors.linenoEm,Colors.line,
                                             ColorsNormal)
 
         # now, loop over all records printing context and info
         abspath = os.path.abspath
         for frame, file, lnum, func, lines, index in records:
             #print '*** record:',file,lnum,func,lines,index  # dbg
             try:
                 file = file and abspath(file) or '?'
             except OSError:
                 # if file is '<console>' or something not in the filesystem,
                 # the abspath call will throw an OSError.  Just ignore it and
                 # keep the original file string.
                 pass
             link = tpl_link % file
             try:
                 args, varargs, varkw, locals = inspect.getargvalues(frame)
             except:
                 # This can happen due to a bug in python2.3.  We should be
                 # able to remove this try/except when 2.4 becomes a
                 # requirement.  Bug details at http://python.org/sf/1005466
                 inspect_error()
                 traceback.print_exc(file=Term.cerr)
                 info("\nIPython's exception reporting continues...\n")
                 
             if func == '?':
                 call = ''
             else:
                 # Decide whether to include variable details or not
                 var_repr = self.include_vars and eqrepr or nullrepr
                 try:
                     call = tpl_call % (func,inspect.formatargvalues(args,
                                                 varargs, varkw,
                                                 locals,formatvalue=var_repr))
                 except KeyError:
                     # Very odd crash from inspect.formatargvalues().  The
                     # scenario under which it appeared was a call to
                     # view(array,scale) in NumTut.view.view(), where scale had
                     # been defined as a scalar (it should be a tuple). Somehow
                     # inspect messes up resolving the argument list of view()
                     # and barfs out. At some point I should dig into this one
                     # and file a bug report about it.
                     inspect_error()
                     traceback.print_exc(file=Term.cerr)
                     info("\nIPython's exception reporting continues...\n")
                     call = tpl_call_fail % func
 
             # Initialize a list of names on the current line, which the
             # tokenizer below will populate.
             names = []
 
             def tokeneater(token_type, token, start, end, line):
                 """Stateful tokeneater which builds dotted names.
 
                 The list of names it appends to (from the enclosing scope) can
                 contain repeated composite names.  This is unavoidable, since
                 there is no way to disambguate partial dotted structures until
                 the full list is known.  The caller is responsible for pruning
                 the final list of duplicates before using it."""
                 
                 # build composite names
                 if token == '.':
                     try:
                         names[-1] += '.'
                         # store state so the next token is added for x.y.z names
                         tokeneater.name_cont = True
                         return
                     except IndexError:
                         pass
                 if token_type == tokenize.NAME and token not in keyword.kwlist:
                     if tokeneater.name_cont:
                         # Dotted names
                         names[-1] += token
                         tokeneater.name_cont = False
                     else:
                         # Regular new names.  We append everything, the caller
                         # will be responsible for pruning the list later.  It's
                         # very tricky to try to prune as we go, b/c composite
                         # names can fool us.  The pruning at the end is easy
                         # to do (or the caller can print a list with repeated
                         # names if so desired.
                         names.append(token)
                 elif token_type == tokenize.NEWLINE:
                     raise IndexError
             # we need to store a bit of state in the tokenizer to build
             # dotted names
             tokeneater.name_cont = False
 
             def linereader(file=file, lnum=[lnum], getline=linecache.getline):
                 line = getline(file, lnum[0])
                 lnum[0] += 1
                 return line
 
             # Build the list of names on this line of code where the exception
             # occurred.
             try:
                 # This builds the names list in-place by capturing it from the
                 # enclosing scope.
                 tokenize.tokenize(linereader, tokeneater)
             except IndexError:
                 # signals exit of tokenizer
                 pass
             except tokenize.TokenError,msg:
                 _m = ("An unexpected error occurred while tokenizing input\n"
                       "The following traceback may be corrupted or invalid\n"
                       "The error message is: %s\n" % msg)
                 error(_m)
             
             # prune names list of duplicates, but keep the right order
             unique_names = uniq_stable(names)
 
             # Start loop over vars
             lvals = []
             if self.include_vars:
                 for name_full in unique_names:
                     name_base = name_full.split('.',1)[0]
                     if name_base in frame.f_code.co_varnames:
                         if locals.has_key(name_base):
                             try:
                                 value = repr(eval(name_full,locals))
                             except:
                                 value = undefined
                         else:
                             value = undefined
                         name = tpl_local_var % name_full
                     else:
                         if frame.f_globals.has_key(name_base):
                             try:
                                 value = repr(eval(name_full,frame.f_globals))
                             except:
                                 value = undefined
                         else:
                             value = undefined
                         name = tpl_global_var % name_full
                     lvals.append(tpl_name_val % (name,value))
             if lvals:
                 lvals = '%s%s' % (indent,em_normal.join(lvals))
             else:
                 lvals = ''
 
             level = '%s %s\n' % (link,call)
 
             if index is None:
                 frames.append(level)
             else:
                 frames.append('%s%s' % (level,''.join(
                     _formatTracebackLines(lnum,index,lines,Colors,lvals,
                                           col_scheme))))
 
         # Get (safely) a string form of the exception info
         try:
             etype_str,evalue_str = map(str,(etype,evalue))
         except:
             # User exception is improperly defined.
             etype,evalue = str,sys.exc_info()[:2]
             etype_str,evalue_str = map(str,(etype,evalue))
         # ... and format it
         exception = ['%s%s%s: %s' % (Colors.excName, etype_str,
                                      ColorsNormal, evalue_str)]
         if type(evalue) is types.InstanceType:
             try:
                 names = [w for w in dir(evalue) if isinstance(w, basestring)]
             except:
                 # Every now and then, an object with funny inernals blows up
                 # when dir() is called on it.  We do the best we can to report
                 # the problem and continue
                 _m = '%sException reporting error (object with broken dir())%s:'
                 exception.append(_m % (Colors.excName,ColorsNormal))
                 etype_str,evalue_str = map(str,sys.exc_info()[:2])
                 exception.append('%s%s%s: %s' % (Colors.excName,etype_str,
                                      ColorsNormal, evalue_str))
                 names = []
             for name in names:
                 value = text_repr(getattr(evalue, name))
                 exception.append('\n%s%s = %s' % (indent, name, value))
+
+        # vds: >>
+        if records:
+             frame, file, lnum, func, lines, index = records[-1]
+             #print "file:", str(file), "linenb", str(lnum)         
+             file = abspath(file)
+             __IPYTHON__.hooks.synchronize_with_editor(file, lnum, 0)
+        # vds: <<
+                
         # return all our info assembled as a single string
         return '%s\n\n%s\n%s' % (head,'\n'.join(frames),''.join(exception[0]) )
 
     def debugger(self,force=False):
         """Call up the pdb debugger if desired, always clean up the tb
         reference.
 
         Keywords:
 
           - force(False): by default, this routine checks the instance call_pdb
           flag and does not actually invoke the debugger if the flag is false.
           The 'force' option forces the debugger to activate even if the flag
           is false.
 
         If the call_pdb flag is set, the pdb interactive debugger is
         invoked. In all cases, the self.tb reference to the current traceback
         is deleted to prevent lingering references which hamper memory
         management.
 
         Note that each call to pdb() does an 'import readline', so if your app
         requires a special setup for the readline completers, you'll have to
         fix that by hand after invoking the exception handler."""
 
         if force or self.call_pdb:
             if self.pdb is None:
                 self.pdb = Debugger.Pdb(
                     self.color_scheme_table.active_scheme_name)
             # the system displayhook may have changed, restore the original
             # for pdb
             dhook = sys.displayhook
             sys.displayhook = sys.__displayhook__
             self.pdb.reset()
             # Find the right frame so we don't pop up inside ipython itself
             if hasattr(self,'tb'):
                 etb = self.tb
             else:
                 etb = self.tb = sys.last_traceback
             while self.tb.tb_next is not None:
                 self.tb = self.tb.tb_next
             try:
                 if etb and etb.tb_next:
                     etb = etb.tb_next
                 self.pdb.botframe = etb.tb_frame
                 self.pdb.interaction(self.tb.tb_frame, self.tb)
             finally:
                 sys.displayhook = dhook
             
         if hasattr(self,'tb'):
             del self.tb
 
     def handler(self, info=None):
         (etype, evalue, etb) = info or sys.exc_info()
         self.tb = etb
         Term.cout.flush()
         print >> Term.cerr, self.text(etype, evalue, etb)
         Term.cerr.flush()
 
     # Changed so an instance can just be called as VerboseTB_inst() and print
     # out the right info on its own.
     def __call__(self, etype=None, evalue=None, etb=None):
         """This hook can replace sys.excepthook (for Python 2.1 or higher)."""
         if etb is None:
             self.handler()
         else:
             self.handler((etype, evalue, etb))
         try:
             self.debugger()
         except KeyboardInterrupt:
             print "\nKeyboardInterrupt"
 
 #----------------------------------------------------------------------------
 class FormattedTB(VerboseTB,ListTB):
     """Subclass ListTB but allow calling with a traceback.
 
     It can thus be used as a sys.excepthook for Python > 2.1.
 
     Also adds 'Context' and 'Verbose' modes, not available in ListTB.
 
     Allows a tb_offset to be specified. This is useful for situations where
     one needs to remove a number of topmost frames from the traceback (such as
     occurs with python programs that themselves execute other python code,
     like Python shells).  """
     
     def __init__(self, mode = 'Plain', color_scheme='Linux',
                  tb_offset = 0,long_header=0,call_pdb=0,include_vars=0):
 
         # NEVER change the order of this list. Put new modes at the end:
         self.valid_modes = ['Plain','Context','Verbose']
         self.verbose_modes = self.valid_modes[1:3]
 
         VerboseTB.__init__(self,color_scheme,tb_offset,long_header,
                            call_pdb=call_pdb,include_vars=include_vars)
         self.set_mode(mode)
         
     def _extract_tb(self,tb):
         if tb:
             return traceback.extract_tb(tb)
         else:
             return None
 
     def text(self, etype, value, tb,context=5,mode=None):
         """Return formatted traceback.
 
         If the optional mode parameter is given, it overrides the current
         mode."""
 
         if mode is None:
             mode = self.mode
         if mode in self.verbose_modes:
             # verbose modes need a full traceback
             return VerboseTB.text(self,etype, value, tb,context=5)
         else:
             # We must check the source cache because otherwise we can print
             # out-of-date source code.
             linecache.checkcache()
             # Now we can extract and format the exception
             elist = self._extract_tb(tb)
             if len(elist) > self.tb_offset:
                 del elist[:self.tb_offset]
             return ListTB.text(self,etype,value,elist)
 
     def set_mode(self,mode=None):
         """Switch to the desired mode.
 
         If mode is not specified, cycles through the available modes."""
 
         if not mode:
             new_idx = ( self.valid_modes.index(self.mode) + 1 ) % \
                       len(self.valid_modes)
             self.mode = self.valid_modes[new_idx]
         elif mode not in self.valid_modes:
             raise ValueError, 'Unrecognized mode in FormattedTB: <'+mode+'>\n'\
                   'Valid modes: '+str(self.valid_modes)
         else:
             self.mode = mode
         # include variable details only in 'Verbose' mode
         self.include_vars = (self.mode == self.valid_modes[2])
 
     # some convenient shorcuts
     def plain(self):
         self.set_mode(self.valid_modes[0])
 
     def context(self):
         self.set_mode(self.valid_modes[1])
 
     def verbose(self):
         self.set_mode(self.valid_modes[2])
 
 #----------------------------------------------------------------------------
 class AutoFormattedTB(FormattedTB):
     """A traceback printer which can be called on the fly.
 
     It will find out about exceptions by itself.
 
     A brief example:
     
     AutoTB = AutoFormattedTB(mode = 'Verbose',color_scheme='Linux')
     try:
       ...
     except:
       AutoTB()  # or AutoTB(out=logfile) where logfile is an open file object
     """
     def __call__(self,etype=None,evalue=None,etb=None,
                  out=None,tb_offset=None):
         """Print out a formatted exception traceback.
 
         Optional arguments:
           - out: an open file-like object to direct output to.
 
           - tb_offset: the number of frames to skip over in the stack, on a
           per-call basis (this overrides temporarily the instance's tb_offset
           given at initialization time.  """
         
         if out is None:
             out = Term.cerr
         Term.cout.flush()
         if tb_offset is not None:
             tb_offset, self.tb_offset = self.tb_offset, tb_offset
             print >> out, self.text(etype, evalue, etb)
             self.tb_offset = tb_offset
         else:
             print >> out, self.text(etype, evalue, etb)
         out.flush()
         try:
             self.debugger()
         except KeyboardInterrupt:
             print "\nKeyboardInterrupt"
 
     def text(self,etype=None,value=None,tb=None,context=5,mode=None):
         if etype is None:
             etype,value,tb = sys.exc_info()
         self.tb = tb
         return FormattedTB.text(self,etype,value,tb,context=5,mode=mode)
 
 #---------------------------------------------------------------------------
 # A simple class to preserve Nathan's original functionality.
 class ColorTB(FormattedTB):
     """Shorthand to initialize a FormattedTB in Linux colors mode."""
     def __init__(self,color_scheme='Linux',call_pdb=0):
         FormattedTB.__init__(self,color_scheme=color_scheme,
                              call_pdb=call_pdb)
 
 #----------------------------------------------------------------------------
 # module testing (minimal)
 if __name__ == "__main__":
     def spam(c, (d, e)):
         x = c + d
         y = c * d
         foo(x, y)
 
     def foo(a, b, bar=1):
         eggs(a, b + bar)
 
     def eggs(f, g, z=globals()):
         h = f + g
         i = f - g
         return h / i
 
     print ''
     print '*** Before ***'
     try:
         print spam(1, (2, 3))
     except:
         traceback.print_exc()
     print ''
     
     handler = ColorTB()
     print '*** ColorTB ***'
     try:
         print spam(1, (2, 3))
     except:
         apply(handler, sys.exc_info() )
     print ''
     
     handler = VerboseTB()
     print '*** VerboseTB ***'
     try:
         print spam(1, (2, 3))
     except:
         apply(handler, sys.exc_info() )
     print ''