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python_to_pythonjs.py
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executable file
·3419 lines (2811 loc) · 113 KB
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#!/usr/bin/env python
# _*_ coding: utf-8 _*_
# Python to PythonJS Translator
# by Amirouche Boubekki and Brett Hartshorn - copyright 2013
# License: "New BSD"
import os, sys, copy
from types import GeneratorType
import ast
from ast import Str
from ast import Call
from ast import Name
from ast import Tuple
from ast import Assign
from ast import keyword
from ast import Subscript
from ast import Attribute
from ast import FunctionDef
from ast import BinOp
from ast import Pass
from ast import Global
from ast import With
from ast import parse
from ast import NodeVisitor
import typedpython
import ministdlib
import inline_function
import code_writer
from ast_utils import *
## TODO
def log(txt):
pass
POWER_OF_TWO = [ 2**i for i in range(32) ]
GLOBAL_VARIABLE_SCOPE = False ## Python style
if '--global-variable-scope' in sys.argv: ## JavaScript style
GLOBAL_VARIABLE_SCOPE = True
log('not using python style variable scope')
writer = writer_main = code_writer.Writer()
__webworker_writers = dict()
def get_webworker_writer( jsfile ):
if jsfile not in __webworker_writers:
__webworker_writers[ jsfile ] = code_writer.Writer()
return __webworker_writers[ jsfile ]
class Typedef(object):
# http://docs.python.org/2/reference/datamodel.html#emulating-numeric-types
_opmap = dict(
__add__ = '+',
__iadd__ = '+=',
__sub__ = '-',
__isub__ = '-=',
__mul__ = '*',
__imul__ = '*=',
__div__ = '/',
__idiv__ = '/=',
__mod__ = '%',
__imod__ = '%=',
__lshift__ = '<<',
__ilshift__ = '<<=',
__rshift__ = '>>',
__irshift__ = '>>=',
__and__ = '&',
__iand__ = '&=',
__xor__ = '^',
__ixor__ = '^=',
__or__ = '|',
__ior__ = '|=',
)
def __init__(self, **kwargs):
for name in kwargs.keys(): ## name, methods, properties, attributes, class_attributes, parents
setattr( self, name, kwargs[name] )
self.operators = dict()
for name in self.methods:
if name in self._opmap:
op = self._opmap[ name ]
self.operators[ op ] = self.get_pythonjs_function_name( name )
def get_pythonjs_function_name(self, name):
assert name in self.methods
return '__%s_%s' %(self.name, name) ## class name
def check_for_parent_with(self, method=None, property=None, operator=None, class_attribute=None):
for parent_name in self.parents:
if not self.compiler.is_known_class_name( parent_name ):
continue
typedef = self.compiler.get_typedef( class_name=parent_name )
if method and method in typedef.methods:
return typedef
elif property and property in typedef.properties:
return typedef
elif operator and typedef.operators:
return typedef
elif class_attribute in typedef.class_attributes:
return typedef
elif typedef.parents:
res = typedef.check_for_parent_with(
method=method,
property=property,
operator=operator,
class_attribute=class_attribute
)
if res:
return res
class PythonToPythonJS(NodeVisitor, inline_function.Inliner):
identifier = 0
_func_typedefs = ()
def __init__(self, source=None, module=None, module_path=None, dart=False, coffee=False, lua=False):
source = typedpython.transform_source( source )
super(PythonToPythonJS, self).__init__()
self.setup_inliner( writer )
self._direct_operators = set() ## optimize "+" operator
self._with_ll = False ## lowlevel
self._with_lua = lua
self._with_coffee = coffee
self._with_dart = dart
self._with_js = False
self._in_lambda = False
self._in_while_test = False
self._use_threading = False
self._use_sleep = False
self._use_array = False
self._webworker_functions = dict()
self._with_webworker = False
self._with_rpc = None
self._with_rpc_name = None
self._source = source.splitlines()
self._classes = dict() ## class name : [method names]
self._class_parents = dict() ## class name : parents
self._instance_attributes = dict() ## class name : [attribute names]
self._class_attributes = dict()
self._catch_attributes = None
self._typedef_vars = dict()
#self._names = set() ## not used?
self._instances = dict() ## instance name : class name
self._decorator_properties = dict()
self._decorator_class_props = dict()
self._function_return_types = dict()
self._return_type = None
self._module = module
self._module_path = module_path ## DEPRECATED
self._typedefs = dict() ## class name : typedef (not pickled)
self._globals = dict()
self._global_nodes = dict()
self._with_static_type = None
self._global_typed_lists = dict() ## global name : set (if len(set)==1 then we know it is a typed list)
self._global_typed_dicts = dict()
self._global_typed_tuples = dict()
self._global_functions = dict()
self._js_classes = dict()
self._in_js_class = False
self._in_assign_target = False
self._with_runtime_exceptions = True
self._iter_ids = 0
self._addop_ids = 0
self._cache_for_body_calls = False
self._cache_while_body_calls = False
self._comprehensions = []
self._generator_functions = set()
self._custom_operators = {}
self._injector = [] ## advanced meta-programming hacks
self._in_class = None
self._with_fastdef = False
self.setup_builtins()
source = self.preprocess_custom_operators( source )
## check for special imports - TODO clean this up ##
for line in source.splitlines():
if line.strip().startswith('import tornado'):
dirname = os.path.dirname(os.path.abspath(__file__))
header = open( os.path.join(dirname, os.path.join('fakelibs', 'tornado.py')) ).read()
source = header + '\n' + source
self._source = source.splitlines()
elif line.strip().startswith('import os'):
dirname = os.path.dirname(os.path.abspath(__file__))
header = open( os.path.join(dirname, os.path.join('fakelibs', 'os.py')) ).read()
source = header + '\n' + source
self._source = source.splitlines()
elif line.strip().startswith('import tempfile'):
dirname = os.path.dirname(os.path.abspath(__file__))
header = open( os.path.join(dirname, os.path.join('fakelibs', 'tempfile.py')) ).read()
source = header + '\n' + source
self._source = source.splitlines()
elif line.strip().startswith('import sys'):
dirname = os.path.dirname(os.path.abspath(__file__))
header = open( os.path.join(dirname, os.path.join('fakelibs', 'sys.py')) ).read()
source = header + '\n' + source
self._source = source.splitlines()
elif line.strip().startswith('import subprocess'):
dirname = os.path.dirname(os.path.abspath(__file__))
header = open( os.path.join(dirname, os.path.join('fakelibs', 'subprocess.py')) ).read()
source = header + '\n' + source
self._source = source.splitlines()
tree = parse( source ) ## ast.parse
self._generator_function_nodes = collect_generator_functions( tree )
for node in tree.body:
## skip module level doc strings ##
if isinstance(node, ast.Expr) and isinstance(node.value, ast.Str):
pass
else:
self.visit(node)
def has_webworkers(self):
return len(self._webworker_functions.keys())
def get_webworker_file_names(self):
return set(self._webworker_functions.values())
def preprocess_custom_operators(self, data):
'''
custom operators must be defined before they are used
'''
code = []
for line in data.splitlines():
if line.strip().startswith('@custom_operator'):
l = line.replace('"', "'")
a,b,c = l.split("'")
op = b.decode('utf-8')
self._custom_operators[ op ] = None
else:
for op in self._custom_operators:
op = op.encode('utf-8')
line = line.replace(op, '|"%s"|'%op)
code.append( line )
data = '\n'.join( code )
return data
def setup_builtins(self):
self._classes['dict'] = set(['__getitem__', '__setitem__'])
self._classes['list'] = set() #['__getitem__', '__setitem__'])
self._classes['tuple'] = set() #['__getitem__', '__setitem__'])
self._builtin_classes = set(['dict', 'list', 'tuple'])
self._builtin_functions = {
'ord':'%s.charCodeAt(0)',
'chr':'String.fromCharCode(%s)',
'abs':'Math.abs(%s)',
'cos':'Math.cos(%s)',
'sin':'Math.sin(%s)',
'sqrt':'Math.sqrt(%s)'
}
self._builtin_functions_dart = {
'ord':'%s.codeUnitAt(0)',
'chr':'new(String.fromCharCode(%s))',
}
def is_known_class_name(self, name):
return name in self._classes
def get_typedef(self, instance=None, class_name=None):
assert instance or class_name
if isinstance(instance, Name) and instance.id in self._instances:
class_name = self._instances[ instance.id ]
if class_name:
#assert class_name in self._classes
if class_name not in self._classes:
log('ERROR: class name not in self._classes: %s'%class_name)
log('self._classes: %s'%self._classes)
raise RuntimeError('class name: %s - not found in self._classes - node:%s '%(class_name, instance))
if class_name not in self._typedefs:
self._typedefs[ class_name ] = Typedef(
name = class_name,
methods = self._classes[ class_name ],
#properties = self._decorator_class_props[ class_name ],
#attributes = self._instance_attributes[ class_name ],
#class_attributes = self._class_attributes[ class_name ],
#parents = self._class_parents[ class_name ],
properties = self._decorator_class_props.get( class_name, set()),
attributes = self._instance_attributes.get( class_name, set()),
class_attributes = self._class_attributes.get( class_name, set()),
parents = self._class_parents.get( class_name, set()),
compiler = self,
)
return self._typedefs[ class_name ]
def visit_Import(self, node):
'''
fallback to requirejs or if in webworker importScripts.
some special modules from pythons stdlib can be faked here like:
. threading
nodejs only:
. tornado
. os
'''
tornado = ['tornado', 'tornado.web', 'tornado.ioloop']
for alias in node.names:
if alias.name in tornado:
pass ## pythonjs/fakelibs/tornado.py
elif alias.name == 'tempfile':
pass ## pythonjs/fakelibs/tempfile.py
elif alias.name == 'sys':
pass ## pythonjs/fakelibs/sys.py
elif alias.name == 'subprocess':
pass ## pythonjs/fakelibs/subprocess.py
elif alias.name == 'json' or alias.name == 'os':
pass ## part of builtins.py
elif alias.name == 'threading':
self._use_threading = True
#writer.write( 'Worker = require("/usr/local/lib/node_modules/workerjs")')
## note: nodewebkit includes Worker, but only from the main script context,
## there might be a bug in requirejs or nodewebkit where Worker gets lost
## when code is loaded into main as a module using requirejs, as a workaround
## allow "workerjs" to be loaded as a fallback, however this appears to not work in nodewebkit.
writer.write( 'if __NODEJS__==True and typeof(Worker)=="undefined": Worker = require("workerjs")')
elif alias.asname:
writer.write( '''inline("var %s = requirejs('%s')")''' %(alias.asname, alias.name) )
elif '.' in alias.name:
raise NotImplementedError('import with dot not yet supported: line %s' % node.lineno)
else:
writer.write( '''inline("var %s = requirejs('%s')")''' %(alias.name, alias.name) )
def visit_ImportFrom(self, node):
if self._with_dart:
lib = ministdlib.DART
elif self._with_lua:
lib = ministdlib.LUA
else:
lib = ministdlib.JS
if node.module == 'time' and node.names[0].name == 'sleep':
self._use_sleep = True
elif node.module == 'array' and node.names[0].name == 'array':
self._use_array = True ## this is just a hint that calls to array call the builtin array
elif node.module in lib:
imported = False
for n in node.names:
if n.name in lib[ node.module ]:
if not imported:
imported = True
if ministdlib.REQUIRES in lib[node.module]:
writer.write('import %s' %','.join(lib[node.module][ministdlib.REQUIRES]))
writer.write( 'JS("%s")' %lib[node.module][n.name] )
if n.name not in self._builtin_functions:
self._builtin_functions[ n.name ] = n.name + '()'
elif node.module.startswith('nodejs.'): ## TODO - DEPRECATE
## this import syntax is now used to import NodeJS bindings see: PythonJS/nodejs/bindings
## the helper script (nodejs.py) checks for these import statements, and loads the binding,
pass
else:
raise SyntaxError( 'invalid import - %s' %node.module )
def visit_Assert(self, node):
## hijacking "assert isinstance(a,A)" as a type system ##
if isinstance( node.test, Call ) and isinstance(node.test.func, Name) and node.test.func.id == 'isinstance':
a,b = node.test.args
if b.id in self._classes:
self._instances[ a.id ] = b.id
def visit_Dict(self, node):
node.returns_type = 'dict'
a = []
for i in range( len(node.keys) ):
k = self.visit( node.keys[ i ] )
v = node.values[i]
if isinstance(v, ast.Lambda):
v.keep_as_lambda = True
v = self.visit( v )
if self._with_js:
a.append( '[%s,%s]'%(k,v) )
elif self._with_dart or self._with_ll:
a.append( '%s:%s'%(k,v) )
#if isinstance(node.keys[i], ast.Str):
# a.append( '%s:%s'%(k,v) )
#else:
# a.append( '"%s":%s'%(k,v) )
else:
a.append( 'JSObject(key=%s, value=%s)'%(k,v) ) ## this allows non-string keys
if self._with_js:
b = ','.join( a )
return '__jsdict( [%s] )' %b
elif self._with_dart or self._with_ll:
b = ','.join( a )
return '{%s}' %b
else:
b = '[%s]' %', '.join(a)
return '__get__(dict, "__call__")([], {"js_object":%s})' %b
def visit_Tuple(self, node):
node.returns_type = 'tuple'
#a = '[%s]' % ', '.join(map(self.visit, node.elts))
a = []
for e in node.elts:
if isinstance(e, ast.Lambda):
e.keep_as_lambda = True
v = self.visit(e)
assert v is not None
a.append( v )
a = '[%s]' % ', '.join(a)
if self._with_dart:
return 'tuple(%s)' %a
else:
return a
def visit_List(self, node):
node.returns_type = 'list'
a = []
for e in node.elts:
if isinstance(e, ast.Lambda): ## inlined and called lambda "(lambda x: x)(y)"
e.keep_as_lambda = True
v = self.visit(e)
assert v is not None
a.append( v )
a = '[%s]' % ', '.join(a)
if self._with_ll:
pass
elif self._with_lua:
a = '__get__(list, "__call__")({}, {pointer:%s, length:%s})'%(a, len(node.elts))
return a
def visit_GeneratorExp(self, node):
return self.visit_ListComp(node)
_comp_id = 0
def visit_ListComp(self, node):
node.returns_type = 'list'
if len(self._comprehensions) == 0:
comps = collect_comprehensions( node )
for i,cnode in enumerate(comps):
cname = '__comp__%s' % self._comp_id
self._comp_id += 1
cnode._comp_name = cname
self._comprehensions.append( cnode )
cname = node._comp_name
writer.write('var(%s)'%cname)
length = len( node.generators )
a = ['idx%s'%i for i in range(length)]
writer.write('var( %s )' %','.join(a) )
a = ['iter%s'%i for i in range(length)]
writer.write('var( %s )' %','.join(a) )
a = ['get%s'%i for i in range(length)]
writer.write('var( %s )' %','.join(a) )
writer.write('%s = JSArray()'%cname)
generators = list( node.generators )
generators.reverse()
self._gen_comp( generators, node )
self._comprehensions.remove( node )
#return '__get__(list, "__call__")([], {pointer:%s})' %cname
return cname
def _gen_comp(self, generators, node):
gen = generators.pop()
#if len(gen.ifs): raise NotImplementedError ## TODO
id = len(generators) + self._comprehensions.index( node )
assert isinstance(gen.target, Name)
writer.write('idx%s = 0'%id)
is_range = False
if isinstance(gen.iter, ast.Call) and isinstance(gen.iter.func, ast.Name) and gen.iter.func.id in ('range', 'xrange'):
is_range = True
#writer.write('iter%s = __get__(len, "__call__")([%s], JSObject())' %(id, self.visit(gen.iter.args[0])) )
writer.write('iter%s = %s' %(id, self.visit(gen.iter.args[0])) )
writer.write('while idx%s < iter%s:' %(id,id) )
writer.push()
writer.write('var(%s)'%gen.target.id)
writer.write('%s=idx%s' %(gen.target.id, id) )
else:
writer.write('iter%s = %s' %(id, self.visit(gen.iter)) )
writer.write('get%s = __get__(iter%s, "__getitem__")'%(id,id) )
writer.write('while idx%s < __get__(len, "__call__")([iter%s], JSObject()):' %(id,id) ) ## TODO optimize
writer.push()
writer.write('var(%s)'%gen.target.id)
writer.write('%s=get%s( [idx%s], JSObject() )' %(gen.target.id, id,id) )
if generators:
self._gen_comp( generators, node )
else:
cname = node._comp_name #self._comprehensions[-1]
if len(gen.ifs):
test = []
for compare in gen.ifs:
test.append( self.visit(compare) )
writer.write('if %s:' %' and '.join(test))
writer.push()
if self._with_dart:
writer.write('%s.add( %s )' %(cname,self.visit(node.elt)) )
elif self._with_lua:
writer.write('table.insert(%s, %s )' %(cname,self.visit(node.elt)) )
else:
writer.write('%s.push( %s )' %(cname,self.visit(node.elt)) )
writer.pull()
else:
if self._with_dart:
writer.write('%s.add( %s )' %(cname,self.visit(node.elt)) )
elif self._with_lua:
writer.write('table.insert(%s, %s )' %(cname,self.visit(node.elt)) )
else:
writer.write('%s.push( %s )' %(cname,self.visit(node.elt)) )
if self._with_lua:
writer.write('idx%s = idx%s + 1' %(id,id) )
else:
writer.write('idx%s+=1' %id )
writer.pull()
if self._with_lua: ## convert to list
writer.write('%s = list.__call__({},{pointer:%s, length:idx%s})' %(cname, cname, id))
def visit_In(self, node):
return ' in '
def visit_NotIn(self, node):
#return ' not in '
raise RuntimeError('"not in" is only allowed in if-test: see method - visit_Compare')
def visit_AugAssign(self, node):
self._in_assign_target = True
target = self.visit( node.target )
self._in_assign_target = False
op = '%s=' %self.visit( node.op )
typedef = self.get_typedef( node.target )
if self._with_lua:
if isinstance(node.target, ast.Subscript):
name = self.visit(node.target.value)
slice = self.visit(node.target.slice)
op = self.visit(node.op)
a = '__get__(%s, "__setitem__")( [%s, __get__(%s, "__getitem__")([%s], {}) %s (%s)], {} )'
a = a %(name, slice, name, slice, op, self.visit(node.value))
writer.write( a )
return
elif op == '+=':
a = '__add_op(%s,%s)' %(target, self.visit(node.value))
elif op == '-=':
a = '(%s - %s)' %(target, self.visit(node.value))
elif op == '*=':
a = '(%s * %s)' %(target, self.visit(node.value))
elif op == '/=' or op == '//=':
a = '(%s / %s)' %(target, self.visit(node.value))
elif op == '%=':
a = '__mod__(%s,%s)' %(target, self.visit(node.value))
elif op == '&=':
a = '__and__(%s,%s)' %(target, self.visit(node.value))
elif op == '|=':
a = '__or__(%s,%s)' %(target, self.visit(node.value))
elif op == '^=':
a = '__xor__(%s,%s)' %(target, self.visit(node.value))
elif op == '<<=':
a = '__lshift__(%s,%s)' %(target, self.visit(node.value))
elif op == '>>=':
a = '__rshift__(%s,%s)' %(target, self.visit(node.value))
else:
raise NotImplementedError(op)
writer.write('%s=%s' %(target,a))
elif typedef and op in typedef.operators:
func = typedef.operators[ op ]
a = '%s( [%s, %s] )' %(func, target, self.visit(node.value))
writer.write( a )
elif op == '//=':
if isinstance(node.target, ast.Attribute):
name = self.visit(node.target.value)
attr = node.target.attr
target = '%s.%s' %(name, attr)
if self._with_dart:
a = '%s = (%s/%s).floor()' %(target, target, self.visit(node.value))
else:
a = '%s = Math.floor(%s/%s)' %(target, target, self.visit(node.value))
writer.write(a)
elif self._with_dart:
if op == '+=':
a = '%s.__iadd__(%s)' %(target, self.visit(node.value))
elif op == '-=':
a = '%s.__isub__(%s)' %(target, self.visit(node.value))
elif op == '*=':
a = '%s.__imul__(%s)' %(target, self.visit(node.value))
elif op == '/=':
a = '%s.__idiv__(%s)' %(target, self.visit(node.value))
elif op == '%=':
a = '%s.__imod__(%s)' %(target, self.visit(node.value))
elif op == '&=':
a = '%s.__iand__(%s)' %(target, self.visit(node.value))
elif op == '|=':
a = '%s.__ior__(%s)' %(target, self.visit(node.value))
elif op == '^=':
a = '%s.__ixor__(%s)' %(target, self.visit(node.value))
elif op == '<<=':
a = '%s.__ilshift__(%s)' %(target, self.visit(node.value))
elif op == '>>=':
a = '%s.__irshift__(%s)' %(target, self.visit(node.value))
else:
raise NotImplementedError
b = '%s %s %s' %(target, op, self.visit(node.value))
## dart2js is smart enough to optimize this if/else away ##
writer.write('if instanceof(%s, Number) or instanceof(%s, String): %s' %(target,target,b) )
writer.write('else: %s' %a)
elif self._with_js: ## no operator overloading in with-js mode
a = '%s %s %s' %(target, op, self.visit(node.value))
writer.write(a)
elif isinstance(node.target, ast.Attribute):
name = self.visit(node.target.value)
attr = node.target.attr
a = '%s.%s %s %s' %(name, attr, op, self.visit(node.value))
writer.write(a)
elif isinstance(node.target, ast.Subscript):
name = self.visit(node.target.value)
slice = self.visit(node.target.slice)
#if self._with_js:
# a = '%s[ %s ] %s %s'
# writer.write(a %(name, slice, op, self.visit(node.value)))
#else:
op = self.visit(node.op)
a = '__get__(%s, "__setitem__")( [%s, __get__(%s, "__getitem__")([%s], {}) %s (%s)], {} )'
writer.write(a %(name, slice, name, slice, op, self.visit(node.value)))
else:
## TODO extra checks to make sure the operator type is valid in this context
a = '%s %s %s' %(target, op, self.visit(node.value))
writer.write(a)
def visit_Yield(self, node):
return 'yield %s' % self.visit(node.value)
def _get_js_class_base_init(self, node ):
for base in node.bases:
if base.id == 'object':
continue
n = self._js_classes[ base.id ]
if hasattr(n, '_cached_init'):
return n._cached_init
else:
return self._get_js_class_base_init( n ) ## TODO fixme
def _visit_dart_classdef(self, node):
name = node.name
log('Dart-ClassDef: %s'%name)
self._js_classes[ name ] = node
methods = {}
method_list = [] ## getter/setters can have the same name
props = set()
for item in node.body:
if isinstance(item, FunctionDef):
methods[ item.name ] = item
finfo = inspect_method( item )
props.update( finfo['properties'] )
if item.name != '__init__':
method_list.append( item )
#if item.name == '__init__': continue
continue
item.args.args = item.args.args[1:] ## remove self
for n in finfo['name_nodes']:
if n.id == 'self':
n.id = 'this'
if props:
writer.write('@properties(%s)'%','.join(props))
for dec in node.decorator_list:
writer.write('@%s'%self.visit(dec))
bases = []
for base in node.bases:
bases.append( self.visit(base) )
if bases:
writer.write('class %s( %s ):'%(node.name, ','.join(bases)))
else:
writer.write('class %s:' %node.name)
init = methods.get( '__init__', None)
writer.push()
## declare vars here
#for attr in props:
# writer.write('JS("var %s")'%attr)
## constructor
if init:
methods.pop( '__init__' )
init.name = node.name
self.visit(init)
## methods
for method in method_list:
self.visit(method)
for item in node.body:
if isinstance(item, ast.With):
s = self.visit(item)
if s: writer.write( s )
if not init and not method_list:
writer.write( 'pass' )
writer.pull()
def _visit_js_classdef(self, node):
name = node.name
log('JavaScript-ClassDef: %s'%name)
self._js_classes[ name ] = node
self._in_js_class = True
methods = {}
class_vars = []
for item in node.body:
if isinstance(item, FunctionDef):
methods[ item.name ] = item
item.args.args = item.args.args[1:] ## remove self
finfo = inspect_function( item )
for n in finfo['name_nodes']:
if n.id == 'self':
n.id = 'this'
elif isinstance(item, ast.Expr) and isinstance(item.value, Str): ## skip doc strings
pass
else:
class_vars.append( item )
#init = methods.pop('__init__')
init = methods.get( '__init__', None)
if init:
args = [self.visit(arg) for arg in init.args.args]
node._cached_init = init
else:
args = []
init = self._get_js_class_base_init( node )
if init:
args = [self.visit(arg) for arg in init.args.args]
node._cached_init = init
writer.write('def %s(%s):' %(name,','.join(args)))
writer.push()
if init:
#for b in init.body:
# line = self.visit(b)
# if line: writer.write( line )
if hasattr(init, '_code'): ## cached ##
code = init._code
elif args:
code = '%s.__init__(this, %s)'%(name, ','.join(args))
init._code = code
else:
code = '%s.__init__(this)'%name
init._code = code
writer.write(code)
else:
writer.write('pass')
## `self.__class__` pointer ##
writer.write('this.__class__ = %s' %name)
## instance UID ##
writer.write('this.__uid__ = "" + _PythonJS_UID')
writer.write('_PythonJS_UID += 1')
writer.pull()
## class UID ##
writer.write('%s.__uid__ = "" + _PythonJS_UID' %name)
writer.write('_PythonJS_UID += 1')
keys = methods.keys()
keys.sort()
for mname in keys:
method = methods[mname]
writer.write('@%s.prototype'%name)
line = self.visit(method)
if line: writer.write( line )
#writer.write('%s.prototype.%s = %s'%(name,mname,mname))
f = 'function () { return %s.prototype.%s.apply(arguments[0], Array.prototype.slice.call(arguments,1)) }' %(name, mname)
writer.write('%s.%s = JS("%s")'%(name,mname,f))
for base in node.bases:
base = self.visit(base)
if base == 'object': continue
a = [
'for (var n in %s.prototype) {'%base,
' if (!(n in %s.prototype)) {'%name,
' %s.prototype[n] = %s.prototype[n]'%(name,base),
' }',
'}'
]
a = ''.join(a)
writer.write( "JS('%s')" %a )
for item in class_vars:
if isinstance(item, Assign) and isinstance(item.targets[0], Name):
item_name = item.targets[0].id
item.targets[0].id = '__%s_%s' % (name, item_name)
self.visit(item) # this will output the code for the assign
writer.write('%s.prototype.%s = %s' % (name, item_name, item.targets[0].id))
## TODO support property decorators in javascript-mode ##
writer.write('%s.prototype.__properties__ = {}' %name)
writer.write('%s.prototype.__unbound_methods__ = {}' %name)
self._in_js_class = False
def visit_ClassDef(self, node):
if self._with_dart:
self._visit_dart_classdef(node)
return
elif self._with_js:
self._visit_js_classdef(node)
return
name = node.name
log('ClassDef: %s'%name)
self._in_class = name
self._classes[ name ] = list() ## method names
self._class_parents[ name ] = set()
self._class_attributes[ name ] = set()
self._catch_attributes = None
self._decorator_properties = dict() ## property names : {'get':func, 'set':func}
self._decorator_class_props[ name ] = self._decorator_properties
self._instances[ 'self' ] = name
class_decorators = []
self._injector = []
for decorator in node.decorator_list: ## class decorators
if isinstance(decorator, Attribute) and isinstance(decorator.value, Name) and decorator.value.id == 'pythonjs':
if decorator.attr == 'property_callbacks':
self._injector.append('set')
elif decorator.attr == 'init_callbacks':
self._injector.append('init')
else:
raise SyntaxError( 'unsupported pythonjs class decorator' )
else:
#raise SyntaxError( 'unsupported class decorator' )
class_decorators.append( decorator )
## always catch attributes ##
self._catch_attributes = set()
self._instance_attributes[ name ] = self._catch_attributes
if not self._with_coffee:
writer.write('var(%s, __%s_attrs, __%s_parents)' % (name, name, name))
writer.write('__%s_attrs = JSObject()' % name)
writer.write('__%s_parents = JSArray()' % name)
writer.write('__%s_properties = JSObject()' % name)
for base in node.bases:
base = self.visit(base)
if base == 'object': continue
self._class_parents[ name ].add( base )
if self._with_lua:
writer.write('table.insert( __%s_parents, %s)' % (name, base))
else:
writer.write('__%s_parents.push(%s)' % (name, base))
for item in node.body:
if isinstance(item, FunctionDef):
log(' method: %s'%item.name)
self._classes[ name ].append( item.name )
item_name = item.name
item.original_name = item.name
item.name = '__%s_%s' % (name, item_name)
self.visit(item) # this will output the code for the function
if item_name in self._decorator_properties:
pass
else:
writer.write('__%s_attrs.%s = %s' % (name, item_name, item.name))
elif isinstance(item, Assign) and isinstance(item.targets[0], Name):
item_name = item.targets[0].id
item.targets[0].id = '__%s_%s' % (name, item_name)
self.visit(item) # this will output the code for the assign
writer.write('__%s_attrs.%s = %s' % (name, item_name, item.targets[0].id))
self._class_attributes[ name ].add( item_name ) ## should this come before self.visit(item) ??
elif isinstance(item, Pass):
pass
elif isinstance(item, ast.Expr) and isinstance(item.value, Str): ## skip doc strings
pass
elif isinstance(item, ast.With) and isinstance( item.context_expr, Name ) and item.context_expr.id == 'javascript':
self._with_js = True
writer.with_javascript = True
for sub in item.body:
if isinstance(sub, Assign) and isinstance(sub.targets[0], Name):
item_name = sub.targets[0].id
sub.targets[0].id = '__%s_%s' % (name, item_name)
self.visit(sub) # this will output the code for the assign
writer.write('__%s_attrs.%s = %s' % (name, item_name, sub.targets[0].id))
self._class_attributes[ name ].add( item_name ) ## should this come before self.visit(item) ??
else:
raise NotImplementedError( sub )
writer.with_javascript = False
self._with_js = False
else:
raise NotImplementedError( item )
for prop_name in self._decorator_properties:
getter = self._decorator_properties[prop_name]['get']
writer.write('__%s_properties["%s"] = JSObject()' %(name, prop_name))
writer.write('__%s_properties["%s"]["get"] = %s' %(name, prop_name, getter))
if self._decorator_properties[prop_name]['set']:
setter = self._decorator_properties[prop_name]['set']
writer.write('__%s_properties["%s"]["set"] = %s' %(name, prop_name, setter))
self._catch_attributes = None
self._decorator_properties = None
self._instances.pop('self')
self._in_class = False
writer.write('%s = __create_class__("%s", __%s_parents, __%s_attrs, __%s_properties)' % (name, name, name, name, name))
if 'init' in self._injector:
writer.write('%s.init_callbacks = JSArray()' %name)
self._injector = []
for dec in class_decorators:
writer.write('%s = __get__(%s,"__call__")( [%s], JSObject() )' % (name, self.visit(dec), name))
def visit_And(self, node):
return ' and '
def visit_Or(self, node):
return ' or '