File: libglibcodegen.py

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"""Library code for GLib/D-Bus-related code generation.

The master copy of this library is in the telepathy-glib repository -
please make any changes there.
"""

# Copyright (C) 2006-2008 Collabora Limited
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library 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
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA


from libtpcodegen import NS_TP, \
                         Signature, \
                         cmp_by_name, \
                         escape_as_identifier, \
                         get_by_path, \
                         get_descendant_text, \
                         get_docstring, \
                         xml_escape, \
                         get_deprecated

def dbus_gutils_wincaps_to_uscore(s):
    """Bug-for-bug compatible Python port of _dbus_gutils_wincaps_to_uscore
    which gets sequences of capital letters wrong in the same way.
    (e.g. in Telepathy, SendDTMF -> send_dt_mf)
    """
    ret = ''
    for c in s:
        if c >= 'A' and c <= 'Z':
            length = len(ret)
            if length > 0 and (length < 2 or ret[length-2] != '_'):
                ret += '_'
            ret += c.lower()
        else:
            ret += c
    return ret


def signal_to_marshal_type(signal):
    """
    return a list of strings indicating the marshalling type for this signal.
    """

    mtype=[]
    for i in signal.getElementsByTagName("arg"):
        name =i.getAttribute("name")
        type = i.getAttribute("type")
        mtype.append(type_to_gtype(type)[2])

    return mtype


_glib_marshallers = ['VOID', 'BOOLEAN', 'CHAR', 'UCHAR', 'INT',
        'STRING', 'UINT', 'LONG', 'ULONG', 'ENUM', 'FLAGS', 'FLOAT',
        'DOUBLE', 'STRING', 'PARAM', 'BOXED', 'POINTER', 'OBJECT',
        'UINT_POINTER']


def signal_to_marshal_name(signal, prefix):

    mtype = signal_to_marshal_type(signal)
    if len(mtype):
        name = '_'.join(mtype)
    else:
        name = 'VOID'

    if name in _glib_marshallers:
        return 'g_cclosure_marshal_VOID__' + name
    else:
        return prefix + '_marshal_VOID__' + name


def method_to_glue_marshal_name(method, prefix):

    mtype = []
    for i in method.getElementsByTagName("arg"):
        if i.getAttribute("direction") != "out":
            type = i.getAttribute("type")
            mtype.append(type_to_gtype(type)[2])

    mtype.append('POINTER')

    name = '_'.join(mtype)

    if name in _glib_marshallers:
        return 'g_cclosure_marshal_VOID__' + name
    else:
        return prefix + '_marshal_VOID__' + name


def type_to_gtype(s):
    if s == 'y': #byte
        return ("guchar ", "G_TYPE_UCHAR","UCHAR", False)
    elif s == 'b': #boolean
        return ("gboolean ", "G_TYPE_BOOLEAN","BOOLEAN", False)
    elif s == 'n': #int16
        return ("gint ", "G_TYPE_INT","INT", False)
    elif s == 'q': #uint16
        return ("guint ", "G_TYPE_UINT","UINT", False)
    elif s == 'i': #int32
        return ("gint ", "G_TYPE_INT","INT", False)
    elif s == 'u': #uint32
        return ("guint ", "G_TYPE_UINT","UINT", False)
    elif s == 'x': #int64
        return ("gint64 ", "G_TYPE_INT64","INT64", False)
    elif s == 't': #uint64
        return ("guint64 ", "G_TYPE_UINT64","UINT64", False)
    elif s == 'd': #double
        return ("gdouble ", "G_TYPE_DOUBLE","DOUBLE", False)
    elif s == 's': #string
        return ("gchar *", "G_TYPE_STRING", "STRING", True)
    elif s == 'g': #signature - FIXME
        return ("gchar *", "DBUS_TYPE_G_SIGNATURE", "STRING", True)
    elif s == 'o': #object path
        return ("gchar *", "DBUS_TYPE_G_OBJECT_PATH", "BOXED", True)
    elif s == 'v':  #variant
        return ("GValue *", "G_TYPE_VALUE", "BOXED", True)
    elif s == 'as':  #array of strings
        return ("gchar **", "G_TYPE_STRV", "BOXED", True)
    elif s == 'ay': #byte array
        return ("GArray *",
            "dbus_g_type_get_collection (\"GArray\", G_TYPE_UCHAR)", "BOXED",
            True)
    elif s == 'au': #uint array
        return ("GArray *", "DBUS_TYPE_G_UINT_ARRAY", "BOXED", True)
    elif s == 'ai': #int array
        return ("GArray *", "DBUS_TYPE_G_INT_ARRAY", "BOXED", True)
    elif s == 'ax': #int64 array
        return ("GArray *", "DBUS_TYPE_G_INT64_ARRAY", "BOXED", True)
    elif s == 'at': #uint64 array
        return ("GArray *", "DBUS_TYPE_G_UINT64_ARRAY", "BOXED", True)
    elif s == 'ad': #double array
        return ("GArray *", "DBUS_TYPE_G_DOUBLE_ARRAY", "BOXED", True)
    elif s == 'ab': #boolean array
        return ("GArray *", "DBUS_TYPE_G_BOOLEAN_ARRAY", "BOXED", True)
    elif s == 'ao': #object path array
        return ("GPtrArray *",
                'dbus_g_type_get_collection ("GPtrArray",'
                ' DBUS_TYPE_G_OBJECT_PATH)',
                "BOXED", True)
    elif s == 'a{ss}': #hash table of string to string
        return ("GHashTable *", "DBUS_TYPE_G_STRING_STRING_HASHTABLE", "BOXED", False)
    elif s[:2] == 'a{':  #some arbitrary hash tables
        if s[2] not in ('y', 'b', 'n', 'q', 'i', 'u', 's', 'o', 'g'):
            raise Exception("can't index a hashtable off non-basic type " + s)
        first = type_to_gtype(s[2])
        second = type_to_gtype(s[3:-1])
        return ("GHashTable *", "(dbus_g_type_get_map (\"GHashTable\", " + first[1] + ", " + second[1] + "))", "BOXED", False)
    elif s[:2] in ('a(', 'aa'): # array of structs or arrays, recurse
        gtype = type_to_gtype(s[1:])[1]
        return ("GPtrArray *", "(dbus_g_type_get_collection (\"GPtrArray\", "+gtype+"))", "BOXED", True)
    elif s[:1] == '(': #struct
        gtype = "(dbus_g_type_get_struct (\"GValueArray\", "
        for subsig in Signature(s[1:-1]):
            gtype = gtype + type_to_gtype(subsig)[1] + ", "
        gtype = gtype + "G_TYPE_INVALID))"
        return ("GValueArray *", gtype, "BOXED", True)

    # we just don't know ..
    raise Exception("don't know the GType for " + s)