[Emacs-diffs] Changes to emacs.py [EMACS_22_BASE]

[Glenn Morris]

CVSROOT:        /sources/emacs
Module name:    emacs
Branch:         EMACS_22_BASE
Changes by:     Glenn Morris <gm>       07/04/28 19:59:28

Index: emacs.py
===================================================================
RCS file: emacs.py
diff -N emacs.py
--- /dev/null   1 Jan 1970 00:00:00 -0000
+++ emacs.py    28 Apr 2007 19:59:28 -0000      1.12.2.2
@@ -0,0 +1,232 @@
+"""Definitions used by commands sent to inferior Python in python.el."""
+
+# Copyright (C) 2004, 2005, 2006, 2007  Free Software Foundation, Inc.
+# Author: Dave Love <address@hidden>
+
+# This file is part of GNU Emacs.
+
+# GNU Emacs is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2, or (at your option)
+# any later version.
+
+# GNU Emacs is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with GNU Emacs; see the file COPYING.  If not, write to the
+# Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+# Boston, MA 02110-1301, USA.
+
+import os, sys, traceback, inspect, __main__
+from sets import Set
+
+__all__ = ["eexecfile", "eargs", "complete", "ehelp", "eimport", "modpath"]
+
+def format_exception (filename, should_remove_self):
+    type, value, tb = sys.exc_info ()
+    sys.last_type = type
+    sys.last_value = value
+    sys.last_traceback = tb
+    if type is SyntaxError:
+        try: # parse the error message
+            msg, (dummy_filename, lineno, offset, line) = value
+        except:
+            pass # Not the format we expect; leave it alone
+        else:
+            # Stuff in the right filename
+            value = SyntaxError(msg, (filename, lineno, offset, line))
+            sys.last_value = value
+    res = traceback.format_exception_only (type, value)
+    # There are some compilation errors which do not provide traceback so we
+    # should not massage it.
+    if should_remove_self:
+        tblist = traceback.extract_tb (tb)
+        del tblist[:1]
+        res = traceback.format_list (tblist)
+        if res:
+            res.insert(0, "Traceback (most recent call last):\n")
+        res[len(res):] = traceback.format_exception_only (type, value)
+    # traceback.print_exception(type, value, tb)
+    for line in res: print line,
+
+def eexecfile (file):
+    """Execute FILE and then remove it.
+    Execute the file within the __main__ namespace.
+    If we get an exception, print a traceback with the top frame
+    (ourselves) excluded."""
+    # We cannot use real execfile since it has a bug where the file stays
+    # locked forever (under w32) if SyntaxError occurs.
+    # --- code based on code.py and PyShell.py.
+    try:
+        try:
+            source = open (file, "r").read()
+            code = compile (source, file, "exec")
+        # Other exceptions (shouldn't be any...) will (correctly) fall
+        # through to "final".
+        except (OverflowError, SyntaxError, ValueError):
+            # FIXME: When can compile() raise anything else than
+            # SyntaxError ????
+            format_exception (file, False)
+            return
+        try:
+            exec code in __main__.__dict__
+        except:
+            format_exception (file, True)
+    finally:
+       os.remove (file)
+
+def eargs (name, imports):
+    "Get arglist of NAME for Eldoc &c."
+    try:
+       if imports: exec imports
+       parts = name.split ('.')
+       if len (parts) > 1:
+           exec 'import ' + parts[0] # might fail
+       func = eval (name)
+       if inspect.isbuiltin (func) or type(func) is type:
+           doc = func.__doc__
+           if doc.find (' ->') != -1:
+               print '_emacs_out', doc.split (' ->')[0]
+           else:
+               print '_emacs_out', doc.split ('\n')[0]
+           return
+       if inspect.ismethod (func):
+           func = func.im_func
+       if not inspect.isfunction (func):
+            print '_emacs_out '
+            return
+       (args, varargs, varkw, defaults) = inspect.getargspec (func)
+       # No space between name and arglist for consistency with builtins.
+       print '_emacs_out', \
+           func.__name__ + inspect.formatargspec (args, varargs, varkw,
+                                                  defaults)
+    except:
+       print "_emacs_out "
+
+def all_names (object):
+    """Return (an approximation to) a list of all possible attribute
+    names reachable via the attributes of OBJECT, i.e. roughly the
+    leaves of the dictionary tree under it."""
+
+    def do_object (object, names):
+       if inspect.ismodule (object):
+           do_module (object, names)
+       elif inspect.isclass (object):
+           do_class (object, names)
+       # Might have an object without its class in scope.
+       elif hasattr (object, '__class__'):
+           names.add ('__class__')
+           do_class (object.__class__, names)
+       # Probably not a good idea to try to enumerate arbitrary
+       # dictionaries...
+       return names
+
+    def do_module (module, names):
+       if hasattr (module, '__all__'): # limited export list
+           names.union_update (module.__all__)
+           for i in module.__all__:
+               do_object (getattr (module, i), names)
+       else:                   # use all names
+           names.union_update (dir (module))
+           for i in dir (module):
+               do_object (getattr (module, i), names)
+       return names
+
+    def do_class (object, names):
+       ns = dir (object)
+       names.union_update (ns)
+       if hasattr (object, '__bases__'): # superclasses
+           for i in object.__bases__: do_object (i, names)
+       return names
+
+    return do_object (object, Set ([]))
+
+def complete (name, imports):
+    """Complete TEXT in NAMESPACE and print a Lisp list of completions.
+    Exec IMPORTS first."""
+    import __main__, keyword
+
+    def class_members(object):
+       names = dir (object)
+       if hasattr (object, '__bases__'):
+           for super in object.__bases__:
+               names = class_members (super)
+       return names    
+
+    names = Set ([])
+    base = None
+    try:
+       dict = __main__.__dict__.copy()
+       if imports: exec imports in dict
+       l = len (name)
+       if not "." in name:
+           for list in [dir (__builtins__), keyword.kwlist, dict.keys()]:
+               for elt in list:
+                   if elt[:l] == name: names.add(elt)
+       else:
+           base = name[:name.rfind ('.')]
+           name = name[name.rfind('.')+1:]
+           try:
+               object = eval (base, dict)
+               names = Set (dir (object))
+               if hasattr (object, '__class__'):
+                   names.add('__class__')
+                   names.union_update (class_members (object))
+           except: names = all_names (dict)
+    except: return []
+    l = len(name)
+    print '_emacs_out (',
+    for n in names:
+       if name == n[:l]:
+           if base: print '"%s.%s"' % (base, n),
+           else: print '"%s"' % n,
+    print ')'
+
+def ehelp (name, imports):
+    """Get help on string NAME.
+    First try to eval name for, e.g. user definitions where we need
+    the object.  Otherwise try the string form."""
+    locls = {}
+    if imports:
+       try: exec imports in locls
+       except: pass
+    try: help (eval (name, globals(), locls))
+    except: help (name)
+
+def eimport (mod, dir):
+    """Import module MOD with directory DIR at the head of the search path.
+    NB doesn't load from DIR if MOD shadows a system module."""
+    from __main__ import __dict__
+
+    path0 = sys.path[0]
+    sys.path[0] = dir
+    try:
+       try:
+           if __dict__.has_key(mod) and inspect.ismodule (__dict__[mod]):
+               reload (__dict__[mod])
+           else:
+               __dict__[mod] = __import__ (mod)
+       except:
+           (type, value, tb) = sys.exc_info ()
+           print "Traceback (most recent call last):"
+           traceback.print_exception (type, value, tb.tb_next)
+    finally:
+       sys.path[0] = path0
+
+def modpath (module):
+    """Return the source file for the given MODULE (or None).
+Assumes that MODULE.py and MODULE.pyc are in the same directory."""
+    try:
+       path = __import__ (module).__file__
+       if path[-4:] == '.pyc' and os.path.exists (path[0:-1]):
+           path = path[:-1]
+       print "_emacs_out", path
+    except:
+       print "_emacs_out ()"
+
+# print '_emacs_ok'            # ready for input and can call continuation
+
+# arch-tag: d90408f3-90e2-4de4-99c2-6eb9c7b9ca46