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#!/usr/bin/env python

# pythfilter.py v1.5.5, written by Matthias Baas (baas@ira.uka.de)

# Doxygen filter which can be used to document Python source code.
# Classes (incl. methods) and functions can be documented.
# Every comment that begins with ## is literally turned into an
# Doxygen comment. Consecutive comment lines are turned into
# comment blocks (-> /** ... */).
# All the stuff is put inside a namespace with the same name as
# the source file.

# Conversions:
# ============
# ##-blocks                  ->  /** ... */
# "class name(base): ..."    ->  "class name : public base {...}"
# "def name(params): ..."    ->  "name(params) {...}"

# Changelog:
# 21.01.2003: Raw (r"") or unicode (u"") doc string will now be properly
#             handled. (thanks to Richard Laager for the patch)
# 22.12.2003: Fixed a bug where no function names would be output for "def"
#             blocks that were not in a class.
#             (thanks to Richard Laager for the patch)
# 12.12.2003: Implemented code to handle static and class methods with
#             this logic: Methods with "self" as the first argument are
#             non-static. Methods with "cls" are Python class methods,
#             which translate into static methods for Doxygen. Other
#             methods are assumed to be static methods. As should be
#             obvious, this logic doesn't take into account if the method
#             is actually setup as a classmethod() or a staticmethod(),
#             just if it follows the normal conventions.
#             (thanks to Richard Laager for the patch)
# 11.12.2003: Corrected #includes to use os.path.sep instead of ".". Corrected
#             namespace code to use "::" instead of ".".
#             (thanks to Richard Laager for the patch)
# 11.12.2003: Methods beginning with two underscores that end with
#             something other than two underscores are considered private
#             and are handled accordingly.
#             (thanks to Richard Laager for the patch)
# 03.12.2003: The first parameter of class methods (self) is removed from
#             the documentation.
# 03.11.2003: The module docstring will be used as namespace documentation
#             (thanks to Joe Bronkema for the patch)
# 08.07.2003: Namespaces get a default documentation so that the namespace
#             and its contents will show up in the generated documentation.
# 05.02.2003: Directories will be delted during synchronization.
# 31.01.2003: -f option & filtering entire directory trees.
# 10.08.2002: In base classes the '.' will be replaced by '::'
# 18.07.2002: * and ** will be translated into arguments
# 18.07.2002: Argument lists may contain default values using constructors.
# 18.06.2002: Support for ## public:
# 21.01.2002: from ... import will be translated to "using namespace ...;"
#             TODO: "from ... import *" vs "from ... import names"
#             TODO: Using normal imports: name.name -> name::name
# 20.01.2002: #includes will be placed in front of the namespace

######################################################################

# The program is written as a state machine with the following states:
#
# - OUTSIDE               The current position is outside any comment,
#                         class definition or function.
#
# - BUILD_COMMENT         Begins with first "##".
#                         Ends with the first token that is no "##"
#                         at the same column as before.
#
# - BUILD_CLASS_DECL      Begins with "class".
#                         Ends with ":"
# - BUILD_CLASS_BODY      Begins just after BUILD_CLASS_DECL.
#                         The first following token (which is no comment)
#                         determines indentation depth.
#                         Ends with a token that has a smaller indendation.
#
# - BUILD_DEF_DECL        Begins with "def".
#                         Ends with ":".
# - BUILD_DEF_BODY        Begins just after BUILD_DEF_DECL.
#                         The first following token (which is no comment)
#                         determines indentation depth.
#                         Ends with a token that has a smaller indendation.

import getopt
import glob
import os.path
import re
import shutil
import string
import sys
import token
import tokenize

from stat import *

OUTSIDE          = 0
BUILD_COMMENT    = 1
BUILD_CLASS_DECL = 2
BUILD_CLASS_BODY = 3
BUILD_DEF_DECL   = 4
BUILD_DEF_BODY   = 5
IMPORT           = 6
IMPORT_OP        = 7
IMPORT_APPEND    = 8

# Output file stream
outfile = sys.stdout

# Output buffer
outbuffer = []

out_row = 1
out_col = 0

# Variables used by rec_name_n_param()
name         = ""
param        = ""
doc_string   = ""
record_state = 0
bracket_counter = 0

# Tuple: (row,column)
class_spos  = (0,0)
def_spos    = (0,0)
import_spos = (0,0)

# Which import was used? ("import" or "from")
import_token = ""

# Comment block buffer
comment_block = []
comment_finished = 0

# Imported modules
modules = []

# Program state
stateStack = [OUTSIDE]

# Keep track of whether module has a docstring
module_has_docstring = False

# Keep track of member protection
protection_level = "public"
private_member = False

# Keep track of the module namespace
namespace = ""

######################################################################
# Output string s. '\n' may only be at the end of the string (not
# somewhere in the middle).
#
# In: s    - String
#     spos - Startpos
######################################################################
def output(s,spos, immediate=0):
    global outbuffer, out_row, out_col, outfile

    os = string.rjust(s,spos[1]-out_col+len(s))

    if immediate:
        outfile.write(os)
    else:
        outbuffer.append(os)

    assert -1 == string.find(s[0:-2], "\n"), s

    if (s[-1:]=="\n"):
        out_row = out_row+1
        out_col = 0
    else:
        out_col = spos[1]+len(s)


######################################################################
# Records a name and parameters. The name is either a class name or
# a function name. Then the parameter is either the base class or
# the function parameters.
# The name is stored in the global variable "name", the parameters
# in "param".
# The variable "record_state" holds the current state of this internal
# state machine.
# The recording is started by calling start_recording().
#
# In: type, tok
######################################################################
def rec_name_n_param(type, tok):
    global record_state,name,param,doc_string,bracket_counter
    s = record_state
    # State 0: Do nothing.
    if   (s==0):
         return
    # State 1: Remember name.
    elif (s==1):
        name = tok
        record_state = 2
    # State 2: Wait for opening bracket or colon
    elif (s==2):
        if (tok=='('):
            bracket_counter = 1
            record_state=3
        if (tok==':'): record_state=4
    # State 3: Store parameter (or base class) and wait for an ending bracket
    elif (s==3):
        if (tok=='*' or tok=='**'):
            tok=''
        if (tok=='('):
            bracket_counter = bracket_counter+1
        if (tok==')'):
            bracket_counter = bracket_counter-1
        if bracket_counter==0:
            record_state=4
        else:
            param=param+tok
    # State 4: Look for doc string
    elif (s==4):
        if (type==token.NEWLINE or type==token.INDENT or type==token.SLASHEQUAL):
            return
        elif (tok==":"):
            return
        elif (type==token.STRING):
            while tok[:1]=='r' or tok[:1]=='u':
                tok=tok[1:]
            while tok[:1]=='"':
                tok=tok[1:]
            while tok[-1:]=='"':
                tok=tok[:-1]
            doc_string=tok
        record_state=0

######################################################################
# Starts the recording of a name & param part.
# The function rec_name_n_param() has to be fed with tokens. After
# the necessary tokens are fed the name and parameters can be found
# in the global variables "name" und "param".
######################################################################
def start_recording():
    global record_state,param,name, doc_string
    record_state=1
    name=""
    param=""
    doc_string=""

######################################################################
# Test if recording is finished
######################################################################
def is_recording_finished():
    global record_state
    return record_state==0

######################################################################
## Gather comment block
######################################################################
def gather_comment(type,tok,spos):
    global comment_block,comment_finished
    if (type!=tokenize.COMMENT):
        comment_finished = 1
    else:
        # Output old comment block if a new one is started.
        if (comment_finished):
            print_comment(spos)
            comment_finished=0
        if (tok[0:2]=="##" and tok[0:3]!="###"):
            append_comment_lines(tok[2:])

######################################################################
## Output comment block and empty buffer.
######################################################################
def print_comment(spos):
    global comment_block,comment_finished
    if (comment_block!=[]):
        output("/** ",spos)
        for c in comment_block:
            output(c,spos)
        output("*/\n",spos)
    comment_block    = []
    comment_finished = 0

######################################################################
def set_state(s):
    global stateStack
    stateStack[len(stateStack)-1]=s

######################################################################
def get_state():
    global stateStack
    return stateStack[len(stateStack)-1]

######################################################################
def push_state(s):
    global stateStack
    stateStack.append(s)

######################################################################
def pop_state():
    global stateStack
    stateStack.pop()


######################################################################
def tok_eater(type, tok, spos, epos, line):
    global stateStack,name,param,class_spos,def_spos,import_spos
    global doc_string, modules, import_token, module_has_docstring
    global protection_level, private_member
    global out_row

    while out_row + 1 < spos[0]:
        output("\n", (0, 0))

    rec_name_n_param(type,tok)
    if (string.replace(string.strip(tok)," ","")=="##private:"):
         protection_level = "private"
         output("private:\n",spos)
    elif (string.replace(string.strip(tok)," ","")=="##protected:"):
         protection_level = "protected"
         output("protected:\n",spos)
    elif (string.replace(string.strip(tok)," ","")=="##public:"):
         protection_level = "public"
         output("public:\n",spos)
    else:
         gather_comment(type,tok,spos)

    state = get_state()

#    sys.stderr.write("%d: %s\n"%(state, tok))

    # OUTSIDE
    if   (state==OUTSIDE):
        if  (tok=="class"):
            start_recording()
            class_spos = spos
            push_state(BUILD_CLASS_DECL)
        elif (tok=="def"):
            start_recording()
            def_spos = spos
            push_state(BUILD_DEF_DECL)
        elif (tok=="import") or (tok=="from"):
            import_token = tok
            import_spos = spos
            modules     = []
            push_state(IMPORT)
        elif (spos[1] == 0 and tok[:3] == '"""'):


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