X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/8b9a4190f70909de9568f45389e7aa3ecbc66b8a..609b563c8b9ade4fcde9160f11c7deaf16a9f7b6:/wxPython/wx/py/introspect.py?ds=sidebyside

diff --git a/wxPython/wx/py/introspect.py b/wxPython/wx/py/introspect.py
index 9acb1ceb64..ebb756999e 100644
--- a/wxPython/wx/py/introspect.py
+++ b/wxPython/wx/py/introspect.py
@@ -1,8 +1,363 @@
+"""Provides a variety of introspective-type support functions for
+things like call tips and command auto completion."""
 
-"""Renamer stub: provides a way to drop the wx prefix from wxPython objects."""
+__author__ = "Patrick K. O'Brien <pobrien@orbtech.com>"
+__cvsid__ = "$Id$"
+__revision__ = "$Revision$"[11:-2]
 
-from wx import _rename
-from wxPython.py import introspect
-_rename(globals(), introspect.__dict__, modulename='py.introspect')
-del introspect
-del _rename
+from __future__ import nested_scopes
+
+import cStringIO
+import inspect
+import sys
+import tokenize
+import types
+
+def getAutoCompleteList(command='', locals=None, includeMagic=1, 
+                        includeSingle=1, includeDouble=1):
+    """Return list of auto-completion options for command.
+    
+    The list of options will be based on the locals namespace."""
+    attributes = []
+    # Get the proper chunk of code from the command.
+    root = getRoot(command, terminator='.')
+    try:
+        if locals is not None:
+            object = eval(root, locals)
+        else:
+            object = eval(root)
+    except:
+        pass
+    else:
+        attributes = getAttributeNames(object, includeMagic, 
+                                       includeSingle, includeDouble)
+    return attributes
+    
+def getAttributeNames(object, includeMagic=1, includeSingle=1,
+                      includeDouble=1):
+    """Return list of unique attributes, including inherited, for object."""
+    attributes = []
+    dict = {}
+    if not hasattrAlwaysReturnsTrue(object):
+        # Add some attributes that don't always get picked up.  If
+        # they don't apply, they'll get filtered out at the end.
+        attributes += ['__bases__', '__class__', '__dict__', '__name__', 
+                       'func_closure', 'func_code', 'func_defaults', 
+                       'func_dict', 'func_doc', 'func_globals', 'func_name']
+    if includeMagic:
+        try: attributes += object._getAttributeNames()
+        except: pass
+    # Get all attribute names.
+    attrdict = getAllAttributeNames(object)
+    for attrlist in attrdict.values():
+        attributes += attrlist
+    # Remove duplicates from the attribute list.
+    for item in attributes:
+        dict[item] = None
+    attributes = dict.keys()
+    # new-style swig wrappings can result in non-string attributes
+    # e.g. ITK http://www.itk.org/
+    attributes = [attribute for attribute in attributes \
+                  if type(attribute) == str]
+    attributes.sort(lambda x, y: cmp(x.upper(), y.upper()))
+    if not includeSingle:
+        attributes = filter(lambda item: item[0]!='_' \
+                            or item[1]=='_', attributes)
+    if not includeDouble:
+        attributes = filter(lambda item: item[:2]!='__', attributes)
+    # Make sure we haven't picked up any bogus attributes somehow.
+    attributes = [attribute for attribute in attributes \
+                  if hasattr(object, attribute)]
+    return attributes
+
+def hasattrAlwaysReturnsTrue(object):
+    return hasattr(object, 'bogu5_123_aTTri8ute')
+
+def getAllAttributeNames(object):
+    """Return dict of all attributes, including inherited, for an object.
+    
+    Recursively walk through a class and all base classes.
+    """
+    attrdict = {}  # (object, technique, count): [list of attributes]
+    # !!!
+    # Do Not use hasattr() as a test anywhere in this function,
+    # because it is unreliable with remote objects: xmlrpc, soap, etc.
+    # They always return true for hasattr().
+    # !!!
+    try:
+        # Yes, this can fail if object is an instance of a class with
+        # __str__ (or __repr__) having a bug or raising an
+        # exception. :-(
+        key = str(object)
+    except:
+        key = 'anonymous'
+    # Wake up sleepy objects - a hack for ZODB objects in "ghost" state.
+    wakeupcall = dir(object)
+    del wakeupcall
+    # Get attributes available through the normal convention.
+    attributes = dir(object)
+    attrdict[(key, 'dir', len(attributes))] = attributes
+    # Get attributes from the object's dictionary, if it has one.
+    try:
+        attributes = object.__dict__.keys()
+        attributes.sort()
+    except:  # Must catch all because object might have __getattr__.
+        pass
+    else:
+        attrdict[(key, '__dict__', len(attributes))] = attributes
+    # For a class instance, get the attributes for the class.
+    try:
+        klass = object.__class__
+    except:  # Must catch all because object might have __getattr__.
+        pass
+    else:
+        if klass is object:
+            # Break a circular reference. This happens with extension
+            # classes.
+            pass
+        else:
+            attrdict.update(getAllAttributeNames(klass))
+    # Also get attributes from any and all parent classes.
+    try:
+        bases = object.__bases__
+    except:  # Must catch all because object might have __getattr__.
+        pass
+    else:
+        if isinstance(bases, types.TupleType):
+            for base in bases:
+                if type(base) is types.TypeType:
+                    # Break a circular reference. Happens in Python 2.2.
+                    pass
+                else:
+                    attrdict.update(getAllAttributeNames(base))
+    return attrdict
+
+def getCallTip(command='', locals=None):
+    """For a command, return a tuple of object name, argspec, tip text.
+    
+    The call tip information will be based on the locals namespace."""
+    calltip = ('', '', '')  # object name, argspec, tip text.
+    # Get the proper chunk of code from the command.
+    root = getRoot(command, terminator='(')
+    try:
+        if locals is not None:
+            object = eval(root, locals)
+        else:
+            object = eval(root)
+    except:
+        return calltip
+    name = ''
+    object, dropSelf = getBaseObject(object)
+    try:
+        name = object.__name__
+    except AttributeError:
+        pass
+    tip1 = ''
+    argspec = ''
+    if inspect.isbuiltin(object):
+        # Builtin functions don't have an argspec that we can get.
+        pass
+    elif inspect.isfunction(object):
+        # tip1 is a string like: "getCallTip(command='', locals=None)"
+        argspec = apply(inspect.formatargspec, inspect.getargspec(object))
+        if dropSelf:
+            # The first parameter to a method is a reference to an
+            # instance, usually coded as "self", and is usually passed
+            # automatically by Python; therefore we want to drop it.
+            temp = argspec.split(',')
+            if len(temp) == 1:  # No other arguments.
+                argspec = '()'
+            elif temp[0][:2] == '(*': # first param is like *args, not self
+                pass 
+            else:  # Drop the first argument.
+                argspec = '(' + ','.join(temp[1:]).lstrip()
+        tip1 = name + argspec
+    doc = ''
+    if callable(object):
+        try:
+            doc = inspect.getdoc(object)
+        except:
+            pass
+    if doc:
+        # tip2 is the first separated line of the docstring, like:
+        # "Return call tip text for a command."
+        # tip3 is the rest of the docstring, like:
+        # "The call tip information will be based on ... <snip>
+        firstline = doc.split('\n')[0].lstrip()
+        if tip1 == firstline or firstline[:len(name)+1] == name+'(':
+            tip1 = ''
+        else:
+            tip1 += '\n\n'
+        docpieces = doc.split('\n\n')
+        tip2 = docpieces[0]
+        tip3 = '\n\n'.join(docpieces[1:])
+        tip = '%s%s\n\n%s' % (tip1, tip2, tip3)
+    else:
+        tip = tip1
+    calltip = (name, argspec[1:-1], tip.strip())
+    return calltip
+
+def getRoot(command, terminator=None):
+    """Return the rightmost root portion of an arbitrary Python command.
+    
+    Return only the root portion that can be eval()'d without side
+    effects.  The command would normally terminate with a '(' or
+    '.'. The terminator and anything after the terminator will be
+    dropped."""
+    command = command.split('\n')[-1]
+    if command.startswith(sys.ps2):
+        command = command[len(sys.ps2):]
+    command = command.lstrip()
+    command = rtrimTerminus(command, terminator)
+    tokens = getTokens(command)
+    if not tokens:
+        return ''
+    if tokens[-1][0] is tokenize.ENDMARKER:
+        # Remove the end marker.
+        del tokens[-1]
+    if not tokens:
+        return ''
+    if terminator == '.' and \
+           (tokens[-1][1] <> '.' or tokens[-1][0] is not tokenize.OP):
+        # Trap decimals in numbers, versus the dot operator.
+        return ''
+    else:
+        # Strip off the terminator.
+        if terminator and command.endswith(terminator):
+            size = 0 - len(terminator)
+            command = command[:size]
+    command = command.rstrip()
+    tokens = getTokens(command)
+    tokens.reverse()
+    line = ''
+    start = None
+    prefix = ''
+    laststring = '.'
+    emptyTypes = ('[]', '()', '{}')
+    for token in tokens:
+        tokentype = token[0]
+        tokenstring = token[1]
+        line = token[4]
+        if tokentype is tokenize.ENDMARKER:
+            continue
+        if tokentype in (tokenize.NAME, tokenize.STRING, tokenize.NUMBER) \
+        and laststring != '.':
+            # We've reached something that's not part of the root.
+            if prefix and line[token[3][1]] != ' ':
+                # If it doesn't have a space after it, remove the prefix.
+                prefix = ''
+            break
+        if tokentype in (tokenize.NAME, tokenize.STRING, tokenize.NUMBER) \
+        or (tokentype is tokenize.OP and tokenstring == '.'):
+            if prefix:
+                # The prefix isn't valid because it comes after a dot.
+                prefix = ''
+                break
+            else:
+                # start represents the last known good point in the line.
+                start = token[2][1]
+        elif len(tokenstring) == 1 and tokenstring in ('[({])}'):
+            # Remember, we're working backwords.
+            # So prefix += tokenstring would be wrong.
+            if prefix in emptyTypes and tokenstring in ('[({'):
+                # We've already got an empty type identified so now we
+                # are in a nested situation and we can break out with
+                # what we've got.
+                break
+            else:
+                prefix = tokenstring + prefix
+        else:
+            # We've reached something that's not part of the root.
+            break
+        laststring = tokenstring
+    if start is None:
+        start = len(line)
+    root = line[start:]
+    if prefix in emptyTypes:
+        # Empty types are safe to be eval()'d and introspected.
+        root = prefix + root
+    return root    
+
+def getTokens(command):
+    """Return list of token tuples for command."""
+    command = str(command)  # In case the command is unicode, which fails.
+    f = cStringIO.StringIO(command)
+    # tokens is a list of token tuples, each looking like: 
+    # (type, string, (srow, scol), (erow, ecol), line)
+    tokens = []
+    # Can't use list comprehension:
+    #   tokens = [token for token in tokenize.generate_tokens(f.readline)]
+    # because of need to append as much as possible before TokenError.
+    try:
+##        This code wasn't backward compatible with Python 2.1.3.
+##
+##        for token in tokenize.generate_tokens(f.readline):
+##            tokens.append(token)
+
+        # This works with Python 2.1.3 (with nested_scopes).
+        def eater(*args):
+            tokens.append(args)
+        tokenize.tokenize_loop(f.readline, eater)
+    except tokenize.TokenError:
+        # This is due to a premature EOF, which we expect since we are
+        # feeding in fragments of Python code.
+        pass
+    return tokens    
+
+def rtrimTerminus(command, terminator=None):
+    """Return command minus anything that follows the final terminator."""
+    if terminator:
+        pieces = command.split(terminator)
+        if len(pieces) > 1:
+            command = terminator.join(pieces[:-1]) + terminator
+    return command
+
+def getBaseObject(object):
+    """Return base object and dropSelf indicator for an object."""
+    if inspect.isbuiltin(object):
+        # Builtin functions don't have an argspec that we can get.
+        dropSelf = 0
+    elif inspect.ismethod(object):
+        # Get the function from the object otherwise
+        # inspect.getargspec() complains that the object isn't a
+        # Python function.
+        try:
+            if object.im_self is None:
+                # This is an unbound method so we do not drop self
+                # from the argspec, since an instance must be passed
+                # as the first arg.
+                dropSelf = 0
+            else:
+                dropSelf = 1
+            object = object.im_func
+        except AttributeError:
+            dropSelf = 0
+    elif inspect.isclass(object):
+        # Get the __init__ method function for the class.
+        constructor = getConstructor(object)
+        if constructor is not None:
+            object = constructor
+            dropSelf = 1
+        else:
+            dropSelf = 0
+    elif callable(object):
+        # Get the __call__ method instead.
+        try:
+            object = object.__call__.im_func
+            dropSelf = 1
+        except AttributeError:
+            dropSelf = 0
+    else:
+        dropSelf = 0
+    return object, dropSelf
+
+def getConstructor(object):
+    """Return constructor for class object, or None if there isn't one."""
+    try:
+        return object.__init__.im_func
+    except AttributeError:
+        for base in object.__bases__:
+            constructor = getConstructor(base)
+            if constructor is not None:
+                return constructor
+    return None