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generate_jsb.py
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#!/usr/bin/python
# ----------------------------------------------------------------------------
# Generates JavaScript Bindings glue code after C / Objective-C code
#
# Author: Ricardo Quesada
# Copyright 2012 (C) Zynga, Inc
#
# License: MIT
# ----------------------------------------------------------------------------
'''
Generates JavaScript Bindings glue code after C / Objective-C code
'''
__docformat__ = 'restructuredtext'
# python
import sys
import os
import re
import getopt
import ast
import xml.etree.ElementTree as ET
import itertools
import copy
import datetime
import ConfigParser
import string
class MethodNotFoundException(Exception):
pass
class ParseException(Exception):
pass
class ParseOKException(Exception):
pass
#
# Globals
#
BINDINGS_PREFIX = 'jsb_'
PROXY_PREFIX = 'JSB_'
METHOD_CONSTRUCTOR, METHOD_CLASS, METHOD_INIT, METHOD_REGULAR = xrange(4)
JSB_VERSION = 'v0.6'
# get_class from: http://stackoverflow.com/a/452981
def get_class(kls):
parts = kls.split('.')
module = ".".join(parts[:-1])
if len(parts) == 1:
m = sys.modules[__name__]
m = getattr(m, parts[0])
else:
m = __import__(module)
for comp in parts[1:]:
m = getattr(m, comp)
return m
# uncapitalize from: http://stackoverflow.com/a/3847369
uncapitalize = lambda s: s[:1].lower() + s[1:] if s else ''
# xml2d recipe copied from here:
# http://code.activestate.com/recipes/577722-xml-to-python-dictionary-and-back/
def xml2d(e):
"""Convert an etree into a dict structure
@type e: etree.Element
@param e: the root of the tree
@return: The dictionary representation of the XML tree
"""
def _xml2d(e):
kids = dict(e.attrib)
for k, g in itertools.groupby(e, lambda x: x.tag):
g = [_xml2d(x) for x in g]
kids[k] = g
return kids
return {e.tag: _xml2d(e)}
# backward compatibility thing:
# newer versions of gen_bridge_metadata used the "struct something*" format
# for declared types.
# older versions where just using "something*".
def sanitize_declared_type(dt):
if dt.startswith("struct "):
return dt[7:]
return dt
class JSBGenerate(object):
def __init__(self, config):
self.config = config
# Generating Object Oriented Functions ?
self.generating_OOF = False
# list of JS functions names that have a C / C++ implementation
# Used to generate 'externs' definitions for Google Closure
self.bound_js_functions = []
#
# UGLY CODE XXX
# This should be accessed using self.config, not the following ugly code
#
self.namespace = config.namespace
self.bs = config.bs
# functions
self.struct_properties = config.struct_properties
self.import_files = config.import_files
self.compatible_with_cpp = config.compatible_with_cpp
self.functions_to_bind = config.functions_to_bind
self.callback_functions = config.callback_functions
self.struct_opaque = config.struct_opaque
self.struct_manual = config.struct_manual
self.function_properties = config.function_properties
self.function_prefix = config.function_prefix
self.function_classes = config.function_classes
# OO Functions
self.c_object_properties = config.c_object_properties
self.manual_bound_methods = config.manual_bound_methods
# classes
self.supported_classes = config.supported_classes
self.class_properties = config.class_properties
self.classes_to_bind = config.classes_to_bind
self.classes_to_ignore = config.classes_to_ignore
self.method_properties = config.method_properties
self.class_properties = config.class_properties
self.complement = config.complement
self.class_manual = config.class_manual
self.parsed_classes = config.parsed_classes
self._inherit_class_methods = config._inherit_class_methods
self.callback_methods = config.callback_methods
self.manual_methods = config.manual_methods
self.class_prefix = config.class_prefix
# constants
self.constant_properties = config.constant_properties
# JS
self.js_new_methods = config.js_new_methods
# Misc
self.bridgesupport_files = config.bridgesupport_files
#
# conversion rules
#
self.init_args_conversion()
def init_args_conversion(self):
#
# Conversion rules
#
# Shared
# Left column: BridgeSupport types
# Right column: JS types
self.supported_declared_types = {
'NSString*': 'S',
'NSArray*': 'array',
'NSMutableArray*': 'array',
'CCArray*': 'array',
'NSSet*': 'set',
'NSDictionary*': 'dict',
'NSMutableDictionary*': 'dict',
'const char*': 'char*',
'const unsigned char*': 'char*',
'char*': 'char*',
'unsigned char*': 'char*',
'void (^)(id)': 'f',
'void (^)(CCNode *)': 'f',
}
self.supported_types = {
'f': 'd', # float
'd': 'd', # double
'i': 'i', # integer
'I': 'u', # unsigned integer
'c': 'c', # char
'C': 'c', # unsigned char
'B': 'b', # BOOL
's': 'c', # short
'v': None, # void (for retval)
'L': 'long', # long (special conversion)
'Q': 'longlong', # long long (special conversion)
}
self.objc_to_js_conversions = {
'i': 'INT_TO_JSVAL((int32_t)%(objc_val)s)',
'u': 'UINT_TO_JSVAL((uint32_t)%(objc_val)s)',
'b': 'BOOLEAN_TO_JSVAL(%(objc_val)s)',
's': 'STRING_TO_JSVAL(%(objc_val)s)',
'd': 'DOUBLE_TO_JSVAL(%(objc_val)s)',
'c': 'INT_TO_JSVAL((int32_t)%(objc_val)s)',
'long': 'JSB_jsval_from_long(cx, %(objc_val)s)', # long: not supported on JS 64-bit
'longlong': 'JSB_jsval_from_longlong(cx, %(objc_val)s)', # long long: not supported on JS
'void': 'JSVAL_VOID',
None: 'JSVAL_VOID',
'o': 'JSB_jsval_from_NSObject(cx, %(objc_val)s)',
'S': 'JSB_jsval_from_NSString( cx, (NSString*) %(objc_val)s )',
'char*': 'JSB_jsval_from_charptr( cx, %(objc_val)s )',
'array': 'JSB_jsval_from_NSArray( cx, (NSArray*) %(objc_val)s )',
'set': 'JSB_jsval_from_NSSet( cx, (NSSet*) %(objc_val)s )',
'dict': 'JSB_jsval_from_NSDictionary( cx, (NSDictionary*) %(objc_val)s )',
}
# Arguments only
# b JSBool Boolean
# c uint16_t/jschar ECMA uint16_t, Unicode char
# i int32_t ECMA int32_t
# u uint32_t ECMA uint32_t
# j int32_t Rounded int32_t (coordinate)
# d double IEEE double
# I double Integral IEEE double
# S JSString * Unicode string, accessed by a JSString pointer
# W jschar * Unicode character vector, 0-terminated (W for wide)
# o JSObject * Object reference
# f JSFunction * Function private
# v jsval Argument value (no conversion)
# * N/A Skip this argument (no vararg)
# / N/A End of required arguments
# More info:
# https://developer.mozilla.org/en/SpiderMonkey/JSAPI_Reference/JS_ConvertArguments
self.args_js_types_conversions = {
'b': ['JSBool', 'JS::ToBoolean'],
'd': ['double', 'JS::ToNumber'],
'I': ['double', 'JS::ToNumber'], # double converted to string
'i': ['int32_t', 'JSB_jsval_to_int32'],
'j': ['int32_t', 'JSB_jsval_to_int32'],
'u': ['uint32_t', 'JSB_jsval_to_uint32'],
'c': ['uint16_t', 'JSB_jsval_to_uint16'],
}
self.args_js_special_type_conversions = {
'S': ['JSB_jsval_to_NSString', 'NSString*'],
'dict': ['JSB_jsval_to_NSDictionary', 'NSDictionary*'],
'char*': ['JSB_jsval_to_charptr', 'const char*'],
'o': ['JSB_jsval_to_NSObject', 'id'],
'array': ['JSB_jsval_to_NSArray', 'NSArray*'],
'set': ['JSB_jsval_to_NSSet', 'NSSet*'],
'f': ['JSB_jsval_to_block_1', 'js_block'],
'long': ['JSB_jsval_to_long', 'long'],
'longlong': ['JSB_jsval_to_longlong', 'long long'],
}
#
# BEGIN Helper functions
#
def convert_to_python_type(self, v):
l = v.lower()
if l == 'true':
return True
elif l == 'false':
return False
return v
# whether or not the method is a constructor
def get_function(self, function_name):
'''returns a function from function name'''
funcs = self.bs['signatures']['function']
for f in funcs:
if f['name'] == function_name:
return f
raise ParseException("Function %s not found" % function_name)
def is_class_constructor(self, method):
if self.is_class_method(method) and 'retval' in method:
retval = method['retval']
dt = retval[0]['declared_type']
dt = sanitize_declared_type(dt)
# Should also check the naming convention. eg: 'spriteWith...'
if dt == 'id':
return True
return False
# whether or not the method is an initializer
def is_method_initializer(self, method):
# Is this is a method ?
if not 'selector' in method:
return False
if 'retval' in method:
retval = method['retval']
dt = retval[0]['declared_type']
dt = sanitize_declared_type(dt)
if method['selector'].startswith('init') and dt == 'id':
return True
return False
def get_struct_type_and_num_of_elements(self, struct):
# PRECOND: Structure must be valid
# BridgeSupport to TypedArray
bs_to_type_array = {'c': 'js::ArrayBufferView::TYPE_INT8',
'C': 'js::ArrayBufferView::TYPE_UINT8',
's': 'js::ArrayBufferView::TYPE_INT16',
'S': 'js::ArrayBufferView::TYPE_UINT16',
'i': 'js::ArrayBufferView::TYPE_INT32',
'I': 'js::ArrayBufferView::TYPE_UINT32',
'f': 'js::ArrayBufferView::TYPE_FLOAT32',
'd': 'js::ArrayBufferView::TYPE_FLOAT64',
}
inner = struct.replace('{', '')
inner = inner.replace('{', '')
inner = inner.replace('}', '')
key, value = inner.split('=')
k = value[0]
if not k in bs_to_type_array:
raise Exception('Structure cannot be converted')
# returns type of structure and len
return (bs_to_type_array[k], len(value))
def get_name_for_manual_struct(self, struct_name):
value = self.get_struct_property(struct_name, 'manual')
if not value:
return struct_name
return value
def get_struct_property(self, struct_name, property):
try:
return self.struct_properties[struct_name][property]
except KeyError:
return None
def is_valid_structure(self, struct):
# Only support non-nested structures of only one type
# valids:
# {xxx=CCC}
# {xxx=ff}
# invalids:
# {xxx=CC{yyy=C}}
# {xxx=fC}
if not struct:
return False
if struct[0] == '{' and struct[-1] == '}' and len(struct.split('{')) == 2:
inner = struct.replace('{', '')
inner = inner.replace('{', '')
inner = inner.replace('}', '')
key, value = inner.split('=')
# values should be of the same type
previous = None
for c in value:
if previous != None:
if previous != c:
return False
previous = c
return True
return False
def get_class_property(self, property, class_name):
try:
return self.class_properties[class_name][property]
except KeyError:
return None
def is_class_method(self, method):
return 'class_method' in method and method['class_method'] == 'true'
def get_constant_property(self, property, default=None):
try:
v = self.constant_properties[property]
v = self.convert_to_python_type(v)
return v
except KeyError:
return default
def get_number_of_arguments(self, function):
ret = 0
if 'arg' in function:
return len(function['arg'])
return ret
#
# END helper functions
#
def generate_pragma_mark(self, class_name, fd):
pragm_mark = '''
/*
* %s
*/
#pragma mark - %s
'''
fd.write(pragm_mark % (class_name, class_name))
def generate_autogenerated_prefix(self, fd):
autogenerated_template = '''/*
* AUTOGENERATED FILE. DO NOT EDIT IT
* Generated by "%s -c %s" on %s
* Script version: %s
*/
#%s "jsb_config.h"
#if JSB_INCLUDE_%s
'''
if self.compatible_with_cpp:
import_name = 'include'
else:
import_name = 'import'
name = self.namespace.upper()
fd.write(autogenerated_template % (os.path.basename(sys.argv[0]), os.path.basename(sys.argv[2]), datetime.date.today(), JSB_VERSION, import_name, name))
# Possible Imported files
for i in self.import_files:
if i and i != '':
fd.write('#%s "%s"\n' % (import_name, i))
def generate_autogenerate_suffix(self, fd):
autogenerated_template = '''
#endif // JSB_INCLUDE_%s
'''
name = self.namespace.upper()
fd.write(autogenerated_template % name)
def generate_retval(self, declared_type, js_type, method=None):
if method and self.is_method_initializer(method):
return '\targs.rval().set(JSVAL_TRUE);'
conversion = self.convert_objc_to_js(declared_type, js_type)
conversion = conversion % ({'objc_val': 'ret_val'})
template = '''
\targs.rval().set(%s);
'''
return template % (conversion)
def validate_retval(self, method, class_name=None):
# parse ret value
if 'retval' in method:
# Special case for initializer methods
if self.is_method_initializer(method):
return (None, None)
# Special case for class constructors
elif self.is_class_constructor(method):
return ('o', class_name + '*')
retval = method['retval'][0]
return self.validate_argument(retval)
return (None, None)
def validate_argument(self, arg):
t = arg['type']
dt = arg['declared_type']
dt = sanitize_declared_type(dt)
# Treat 'id' as NSObject*
if dt == 'id':
dt = 'NSObject*'
# Treat 'int64_t' as long long
if dt == 'int64_t':
t='Q';
dt_class_name = dt.replace('*', '')
# IMPORTANT: 1st search on declared types.
# NSString should be treated as a special case, not as a generic object
if dt in self.supported_declared_types:
return (self.supported_declared_types[dt], dt)
elif t in self.supported_types:
return (self.supported_types[t], dt)
# special case for Objects
elif t == '@' and dt_class_name in self.supported_classes:
return ('o', dt)
# valid 'opaque' struct ?
elif dt in self.struct_opaque:
return ('N/A', dt)
# valid manual struct ?
elif dt in self.struct_manual:
return ('N/A', dt)
# valid automatic struct ?
elif self.is_valid_structure(t):
return (t, dt)
raise ParseException("Unsupported argument: %s" % dt)
def validate_arguments(self, method):
args_js_type = []
args_declared_type = []
# parse arguments
if 'arg' in method:
args = method['arg']
for arg in args:
js_type, dt = self.validate_argument(arg)
# Skip argument if they are none
if js_type is not None and dt is not None:
args_js_type.append(js_type)
args_declared_type.append(dt)
return (args_js_type, args_declared_type)
def generate_argument_variadic_2_nsarray(self):
template = '\tok &= JSB_jsvals_variadic_to_NSArray(cx, args.get(0), &arg0 );\n'
self.fd_mm.write(template)
def convert_js_to_objc(self, js_type, objc_type):
if objc_type in self.function_classes and self.generating_OOF:
return 'JSB_jsval_to_c_class( cx, %(jsval)s, (void**)%(retval)s, NULL )'
elif objc_type in self.struct_opaque:
return 'JSB_jsval_to_opaque( cx, %(jsval)s, (void**)%(retval)s )'
elif objc_type in self.struct_manual:
new_name = self.get_name_for_manual_struct(objc_type)
return 'JSB_jsval_to_%s( cx, %%(jsval)s, (%s*) %%(retval)s )' % (new_name, new_name)
elif self.is_valid_structure(js_type):
return 'JSB_jsval_to_struct( cx, %%(jsval)s, %%(retval)s, sizeof(%s) )' % (objc_type)
elif js_type in self.args_js_types_conversions:
js_convert = self.args_js_types_conversions[js_type][1]
return js_convert + '( cx, %(jsval)s, %(retval)s )'
elif js_type in self.args_js_special_type_conversions:
js_convert = self.args_js_special_type_conversions[js_type][0]
if js_type == 'f':
return js_convert + '( cx, %(jsval)s, JS_THIS_OBJECT(cx, vp), %(retval)s )'
else:
return js_convert + '( cx, %(jsval)s, %(retval)s )'
else:
raise ParseException('Unsupported argument type: %s' % js_type)
def convert_objc_to_js(self, objc_type, js_type):
if objc_type in self.function_classes and self.generating_OOF:
# remove '*' from class name
klass = objc_type[:-1]
template = 'JSB_jsval_from_c_class( cx, %%(objc_val)s, %s, %s, "%s" )'
return template % ('JSB_%s_object' % klass, 'JSB_%s_class' % klass, klass)
elif objc_type in self.struct_opaque:
return 'JSB_jsval_from_opaque( cx, %(objc_val)s )'
elif objc_type in self.struct_manual:
new_name = self.get_name_for_manual_struct(objc_type)
template = 'JSB_jsval_from_%s( cx, (%s)%%(objc_val)s )'
return template % (new_name, objc_type)
elif self.is_valid_structure(js_type):
t, l = self.get_struct_type_and_num_of_elements(js_type)
template = 'JSB_jsval_from_struct( cx, %d, &%%(objc_val)s, %s )'
return template % (l, t)
elif js_type in self.objc_to_js_conversions:
return self.objc_to_js_conversions[js_type]
else:
raise Exception("Invalid key: %s" % js_type)
def generate_argument(self, i, arg_js_type, arg_declared_type):
template = self.convert_js_to_objc(arg_js_type, arg_declared_type)
template = template % ({
"jsval": "args.get(%d)" % i,
"retval": "&arg%d" % i
})
return "\tok &= %s;\n" % template
# The type of the value returned by the JS conversion function
def get_conversion_return_type(self, js_type, objc_type):
if objc_type in self.struct_opaque or objc_type in self.function_classes:
return objc_type
elif objc_type in self.struct_manual:
return objc_type
elif self.is_valid_structure(js_type):
return objc_type
elif js_type in self.args_js_types_conversions:
return self.args_js_types_conversions[js_type][0]
elif js_type in self.args_js_special_type_conversions:
return self.args_js_special_type_conversions[js_type][1]
else:
raise ParseException('Unsupported argument type: %s' % js_type)
def generate_arguments(self, args_declared_type, args_js_type, properties={}):
# First time
self.fd_mm.write('\tJS::CallArgs args = JS::CallArgsFromVp(argc, vp);\n')
self.fd_mm.write('\tbool ok = true;\n')
# first_arg is used by "OO Functions". The first argument should be "self", so argv[0] is skipped in those cases
first_arg = properties.get('first_arg', 0)
# Declare variables
declared_vars = '\t'
for i, arg in enumerate(args_js_type):
if i < first_arg:
continue
arg_type = self.get_conversion_return_type(arg, args_declared_type[i])
declared_vars += '%s arg%d;' % (arg_type, i)
declared_vars += ' '
self.fd_mm.write('%s\n\n' % declared_vars)
# Optional Arguments ? Used when merging methods
min_args = properties.get('min_args', None)
max_args = properties.get('max_args', None)
if min_args != max_args:
optional_args = min_args
else:
optional_args = None
# Use variables
# Special case for variadic_2_nsarray
if 'variadic_2_array' in properties:
self.generate_argument_variadic_2_nsarray()
else:
for i, arg in enumerate(args_js_type):
if i < first_arg:
continue
if optional_args != None and i >= optional_args:
self.fd_mm.write('\tif (argc >= %d) {\n\t' % (i + 1))
self.fd_mm.write(self.generate_argument(i, arg, args_declared_type[i]))
if optional_args != None and i >= optional_args:
self.fd_mm.write('\t}\n')
self.fd_mm.write('\tJSB_PRECONDITION2(ok, cx, false, "Error processing arguments");\n')
#
# Externs related
#
def externs_create_file(self):
self.externs_fd = open('%s_externs.js' % (self.namespace), 'w')
def externs_close_file(self):
self.externs_fd.close()
def externs_write_function(self, func_name):
js_body = 'function %s(){};\n'
self.externs_fd.write(js_body % func_name)
def generate_externs(self):
if len(self.bound_js_functions) > 0:
self.externs_create_file()
for function_name in self.bound_js_functions:
self.externs_write_function(function_name)
self.externs_close_file()
#
#
# Generates Classes
#
#
class JSBGenerateClasses(JSBGenerate):
def __init__(self, config):
super(JSBGenerateClasses, self).__init__(config)
#
# BEGIN helper functions
#
def create_files(self):
self.fd_h = open('%s%s_classes.h' % (BINDINGS_PREFIX, self.namespace), 'w')
self.generate_class_header_prefix()
self.fd_mm = open('%s%s_classes.mm' % (BINDINGS_PREFIX, self.namespace), 'w')
def convert_class_name_to_js(self, class_name):
# rename rule ?
if class_name in self.class_properties and 'name' in self.class_properties[class_name]:
name = self.class_properties[class_name]['name']
name = name.replace('"', '')
return name
# Prefix rule ?
if class_name.startswith(self.class_prefix):
class_name = class_name[len(self.class_prefix):]
return class_name
def convert_selector_name_to_native(self, name):
return name.replace(':', '_')
def convert_selector_name_to_js(self, class_name, selector):
# Does it have a rename rule ?
try:
return self.method_properties[class_name][selector]['name']
except KeyError:
pass
# Is it a property ?
try:
if selector in self.complement[class_name]['properties']:
# Does it have a properties ?
# props = self.complement[class_name]['properties'][selector]
# print selector
# props = self.parse_objc_properties(props)
# print props
# if 'getter' in props:
# ret = props['getter']
# print ret
# xxxx
# else
ret = 'get%s%s' % (selector[0].capitalize(), selector[1:])
return ret
except KeyError:
pass
name = ''
parts = selector.split(':')
for i, arg in enumerate(parts):
if i == 0:
name += arg
elif arg:
name += arg[0].capitalize() + arg[1:]
return name
def parse_objc_properties(self, props):
ret = {}
# only get first element of array
p = props[0].split(',')
for k in p:
key_value = k.split('=')
key = key_value[0].strip()
if len(key_value) > 1:
value = key_value[1].strip()
else:
value = None
ret[key] = value
return ret
def get_method(self, class_name, method_name):
for klass in self.bs['signatures']['class']:
if klass['name'] == class_name:
for m in klass['method']:
if m['selector'] == method_name:
return m
# Not found... search in protocols
if 'informal_protocol' in self.bs['signatures'] and 'protocols' in self.complement[class_name]:
list_of_protocols = self.bs['signatures']['informal_protocol']
protocols = self.complement[class_name]['protocols']
for protocol in protocols:
for ip in list_of_protocols:
# protocol match ?
if ip['name'] == protocol:
# traverse method then
for m in ip['method']:
if m['selector'] == method_name:
return m
raise MethodNotFoundException("Method not found for %s # %s" % (class_name, method_name))
def get_method_type(self, method):
if self.is_class_constructor(method):
method_type = METHOD_CONSTRUCTOR
elif self.is_class_method(method):
method_type = METHOD_CLASS
elif self.is_method_initializer(method):
method_type = METHOD_INIT
else:
method_type = METHOD_REGULAR
return method_type
def get_callback_args_for_method(self, method):
method_name = method['selector']
method_args = method_name.split(':')
full_args = []
args = []
if 'arg' in method:
for i, arg in enumerate(method['arg']):
full_args.append(method_args[i] + ':')
full_args.append('(' + arg['declared_type'] + ')')
full_args.append(arg['name'] + ' ')
args.append(method_args[i] + ':')
args.append(arg['name'] + ' ')
return [''.join(full_args), ''.join(args)]
return method_name, method_name
def get_parent_class(self, class_name):
try:
parent = self.complement[class_name]['subclass']
except KeyError:
return None
return parent
def get_class_method(self, class_name):
class_methods = []
klass = None
list_of_classes = self.bs['signatures']['class']
for k in list_of_classes:
if k['name'] == class_name:
klass = k
if not klass:
raise Exception("Base class not found: %s" % class_name)
for m in klass['method']:
if self.is_class_method(m):
class_methods.append(m)
return class_methods
def inherits_class_methods(self, class_name, methods_to_parse=[]):
i = self.get_class_property('inherit_class_methods', class_name)
if i != None:
return i
inherit = self._inherit_class_methods.lower()
if inherit == 'false':
return False
elif inherit == 'true':
return True
elif inherit == 'auto':
for m in methods_to_parse:
if self.is_class_constructor(m):
return False
else:
raise Exception("Unknown value for inherit_class_methods: %s", self._inherit_class_methods)
return True
def requires_swizzle(self, class_name):
if class_name in self.callback_methods:
for m in self.callback_methods[class_name]:
if not self.get_method_property(class_name, m, 'no_swizzle'):
return True
return False
def get_method_property(self, class_name, method_name, prop):
try:
return self.method_properties[class_name][method_name][prop]
except KeyError:
return None
#
# END helper functions
#
#
# "class" constructor and destructor
#
def generate_constructor(self, class_name):
# Global Variables
# JSB_CCNode
# JSB_CCNode
constructor_globals = '''
JSClass* %s_class = NULL;
JSObject* %s_object = NULL;
'''
# 1: JSB_CCNode,
# 2: JSB_CCNode,
# 8: possible callback code
constructor_template = '''// Constructor
bool %s_constructor(JSContext *cx, uint32_t argc, jsval *vp)
{
\tJSObject *jsobj = [%s createJSObjectWithRealObject:nil context:cx];
\targs.rval().set(OBJECT_TO_JSVAL(jsobj));
\treturn JS_TRUE;
}
'''
proxy_class_name = '%s%s' % (PROXY_PREFIX, class_name)
self.fd_mm.write(constructor_globals % (proxy_class_name, proxy_class_name))
self.fd_mm.write(constructor_template % (proxy_class_name, proxy_class_name))
def generate_destructor(self, class_name):
destructor_template = '''
// Destructor
void %s_finalize(JSFreeOp *fop, JSObject *obj)
{
\tCCLOGINFO(@"jsbindings: finalizing JS object %%p (%s)", obj);
//\tJSB_NSObject *proxy = (JSB_NSObject*) JSB_get_proxy_for_jsobject(obj);
//\tif (proxy) {
//\t\t[[proxy realObj] release];
//\t}
\tJSB_del_proxy_for_jsobject( obj );
}
'''
proxy_class_name = '%s%s' % (PROXY_PREFIX, class_name)
self.fd_mm.write(destructor_template % (proxy_class_name,
class_name))
def generate_ctor_method(self, klass_name):
template = '''
// 'ctor' method. Needed for subclassing native objects in JS
bool JSB_%s_ctor(JSContext *cx, uint32_t argc, jsval *vp) {
\tJSObject* obj = (JSObject *)JS_THIS_OBJECT(cx, vp);
\tJSB_PRECONDITION2( !JSB_get_proxy_for_jsobject(obj), cx, false, "Object already initialzied. error" );
\tJSB_%s *proxy = [[JSB_%s alloc] initWithJSObject:obj class:[%s class]];
\t[[proxy class] swizzleMethods];
\targs.rval().set(JSVAL_TRUE);
\treturn JS_TRUE;
}
'''
self.fd_mm.write(template % (klass_name, klass_name, klass_name, klass_name))
#
# Method generator functions
#
def generate_method_call_to_real_object(self, selector_name, num_of_args, ret_js_type, args_declared_type, args_js_type, class_name, method_type):
args = selector_name.split(':')
if method_type == METHOD_INIT:
prefix = '\t%s *real = [(%s*)[proxy.klass alloc] ' % (class_name, class_name)
suffix = '\n\t[proxy setRealObj: real];\n\t[real autorelease];\n'
suffix += '\n\tobjc_setAssociatedObject(real, &JSB_association_proxy_key, proxy, OBJC_ASSOCIATION_RETAIN);'
suffix += '\n\t[proxy release];'
elif method_type == METHOD_REGULAR:
prefix = '\t%s *real = (%s*) [proxy realObj];\n\t' % (class_name, class_name)
suffix = ''
if ret_js_type:
prefix = prefix + 'ret_val = '
prefix = prefix + '[real '
elif method_type == METHOD_CONSTRUCTOR:
prefix = '\tret_val = [%s ' % (class_name)
suffix = ''
elif method_type == METHOD_CLASS:
if not ret_js_type:
prefix = '\t[%s ' % (class_name)
else:
prefix = '\tret_val = [%s ' % (class_name)
suffix = ''
else:
raise Exception('Invalid method type')
call = ''
for i, arg in enumerate(args):
if num_of_args == 0:
call += arg
elif i + 1 > num_of_args:
break
elif arg: # empty arg?
if args_js_type[i] == 'o':
call += '%s:arg%d ' % (arg, i)
else:
# cast needed to prevent compiler errors
call += '%s:(%s)arg%d ' % (arg, args_declared_type[i], i)
call += ' ];'
return '%s%s%s' % (prefix, call, suffix)
def generate_method_prefix(self, class_name, method, num_of_args, method_type):
# JSB_CCNode, setPosition
# "!" or ""
# proxy.initialized = YES (or nothing)
template_methodname = '''
bool %s_%s%s(JSContext *cx, uint32_t argc, jsval *vp) {
'''
template_init = '''
\tJSObject* jsthis = (JSObject *)JS_THIS_OBJECT(cx, vp);
\tJSB_NSObject *proxy = (JSB_NSObject*) JSB_get_proxy_for_jsobject(jsthis);
\tJSB_PRECONDITION2( proxy && %s[proxy realObj], cx, false, "Invalid Proxy object");
'''
selector = method['selector']
converted_name = self.convert_selector_name_to_native(selector)
# method name
class_method = '_static' if self.is_class_method(self.current_method) else ''
self.fd_mm.write(template_methodname % (PROXY_PREFIX + class_name, converted_name, class_method))
# method asserts for instance methods
if method_type == METHOD_INIT or method_type == METHOD_REGULAR:
assert_init = '!' if method_type == METHOD_INIT else ''
self.fd_mm.write(template_init % assert_init)
try:
# Does it have optional arguments ?
properties = self.method_properties[class_name][selector]
min_args = properties.get('min_args', None)
max_args = properties.get('max_args', None)
if min_args != max_args:
method_assert_on_arguments = '\tJSB_PRECONDITION2( argc >= %d && argc <= %d , cx, false, "Invalid number of arguments" );\n' % (min_args, max_args)
elif 'variadic_2_array' in properties:
method_assert_on_arguments = '\tJSB_PRECONDITION2( argc >= 0, cx, false, "Invalid number of arguments" );\n'