def translate_js(js, top=TOP_GLOBAL):
"""js has to be a javascript source code.
returns equivalent python code."""
# Remove constant literals
no_const, constants = remove_constants(js)
#print 'const count', len(constants)
# Remove object literals
no_obj, objects, obj_count = remove_objects(no_const)
#print 'obj count', len(objects)
# Remove arrays
no_arr, arrays, arr_count = remove_arrays(no_obj)
#print 'arr count', len(arrays)
# Here remove and replace functions
reset_inline_count()
no_func, hoisted, inline = remove_functions(no_arr)
#translate flow and expressions
py_seed, to_register = translate_flow(no_func)
# register variables and hoisted functions
#top += '# register variables\n'
top += 'var.registers(%s)\n' % str(to_register + hoisted.keys())
#Recover functions
# hoisted functions recovery
defs = ''
#defs += '# define hoisted functions\n'
#print len(hoisted) , 'HH'*40
for nested_name, nested_info in hoisted.iteritems():
nested_block, nested_args = nested_info
new_code = translate_func('PyJsLvalTempHoisted', nested_block, nested_args)
new_code += 'PyJsLvalTempHoisted.func_name = %s\n' %repr(nested_name)
defs += new_code +'\nvar.put(%s, PyJsLvalTempHoisted)\n' % repr(nested_name)
#defs += '# Everting ready!\n'
# inline functions recovery
for nested_name, nested_info in inline.iteritems():
nested_block, nested_args = nested_info
new_code = translate_func(nested_name, nested_block, nested_args)
py_seed = inject_before_lval(py_seed, nested_name.split('@')[0], new_code)
# add hoisted definitiond - they have literals that have to be recovered
py_seed = defs + py_seed
#Recover arrays
for arr_lval, arr_code in arrays.iteritems():
translation, obj_count, arr_count = translate_array(arr_code, arr_lval, obj_count, arr_count)
py_seed = inject_before_lval(py_seed, arr_lval, translation)
#Recover objects
for obj_lval, obj_code in objects.iteritems():
translation, obj_count, arr_count = translate_object(obj_code, obj_lval, obj_count, arr_count)
py_seed = inject_before_lval(py_seed, obj_lval, translation)
#Recover constants
py_code = recover_constants(py_seed, constants)
return top + py_code
def translate_func(name, block, args):
"""Translates functions and all nested functions to Python code.
name - name of that function (global functions will be available under var while
inline will be available directly under this name )
block - code of the function (*with* brackets {} )
args - arguments that this function takes"""
inline = name.startswith('PyJsLvalInline')
real_name = ''
if inline:
name, real_name = name.split('@')
arglist = ', '.join(args) + ', ' if args else ''
code = '@Js\ndef %s(%sthis, arguments, var=var):\n' % (name, arglist)
# register local variables
scope = "'this':this, 'arguments':arguments" # it will be a simple dictionary
for arg in args:
scope += ', %s:%s' % (repr(arg), arg)
if real_name:
scope += ', %s:%s' % (repr(real_name), name)
code += indent('var = Scope({%s}, var)\n' % scope)
block, nested_hoisted, nested_inline = remove_functions(block)
py_code, to_register = translate_flow(block)
# register variables declared with var and names of hoisted functions.
to_register += nested_hoisted.keys()
if to_register:
code += indent('var.registers(%s)\n' % str(to_register))
for nested_name, info in nested_hoisted.iteritems():
nested_block, nested_args = info
new_code = translate_func('PyJsLvalTempHoisted', nested_block,
nested_args)
# Now put definition of hoisted function on the top
code += indent(new_code)
code += indent('PyJsLvalTempHoisted.func_name = %s\n' %
repr(nested_name))
code += indent('var.put(%s, PyJsLvalTempHoisted)\n' %
repr(nested_name))
for nested_name, info in nested_inline.iteritems():
nested_block, nested_args = info
new_code = translate_func(nested_name, nested_block, nested_args)
# Inject definitions of inline functions just before usage
# nested inline names have this format : LVAL_NAME@REAL_NAME
py_code = inject_before_lval(py_code,
nested_name.split('@')[0], new_code)
if py_code.strip():
code += indent(py_code)
return code
def translate_func(name, block, args):
"""Translates functions and all nested functions to Python code.
name - name of that function (global functions will be available under var while
inline will be available directly under this name )
block - code of the function (*with* brackets {} )
args - arguments that this function takes"""
inline = name.startswith('PyJsLvalInline')
real_name = ''
if inline:
name, real_name = name.split('@')
arglist = ', '.join(args) + ', ' if args else ''
code = '@Js\ndef %s(%sthis, arguments, var=var):\n' % (name, arglist)
# register local variables
scope = "'this':this, 'arguments':arguments" #it will be a simple dictionary
for arg in args:
scope += ', %s:%s' % (repr(arg), arg)
if real_name:
scope += ', %s:%s' % (repr(real_name), name)
code += indent('var = Scope({%s}, var)\n' % scope)
block, nested_hoisted, nested_inline = remove_functions(block)
py_code, to_register = translate_flow(block)
#register variables declared with var and names of hoisted functions.
to_register += nested_hoisted.keys()
if to_register:
code += indent('var.registers(%s)\n' % str(to_register))
for nested_name, info in nested_hoisted.iteritems():
nested_block, nested_args = info
new_code = translate_func('PyJsLvalTempHoisted', nested_block,
nested_args)
# Now put definition of hoisted function on the top
code += indent(new_code)
code += indent(
'PyJsLvalTempHoisted.func_name = %s\n' % repr(nested_name))
code += indent(
'var.put(%s, PyJsLvalTempHoisted)\n' % repr(nested_name))
for nested_name, info in nested_inline.iteritems():
nested_block, nested_args = info
new_code = translate_func(nested_name, nested_block, nested_args)
# Inject definitions of inline functions just before usage
# nested inline names have this format : LVAL_NAME@REAL_NAME
py_code = inject_before_lval(py_code,
nested_name.split('@')[0], new_code)
if py_code.strip():
code += indent(py_code)
return code
def translate_js(js, top=TOP_GLOBAL):
"""js has to be a javascript source code.
returns equivalent python code."""
# Remove constant literals
no_const, constants = remove_constants(js)
# print 'const count', len(constants)
# Remove object literals
no_obj, objects, obj_count = remove_objects(no_const)
# print 'obj count', len(objects)
# Remove arrays
no_arr, arrays, arr_count = remove_arrays(no_obj)
# print 'arr count', len(arrays)
# Here remove and replace functions
reset_inline_count()
no_func, hoisted, inline = remove_functions(no_arr)
# translate flow and expressions
py_seed, to_register = translate_flow(no_func)
# register variables and hoisted functions
# top += '# register variables\n'
top += 'var.registers(%s)\n' % str(to_register + hoisted.keys())
# Recover functions
# hoisted functions recovery
defs = ''
# defs += '# define hoisted functions\n'
# print len(hoisted) , 'HH'*40
for nested_name, nested_info in hoisted.iteritems():
nested_block, nested_args = nested_info
new_code = translate_func('PyJsLvalTempHoisted', nested_block,
nested_args)
new_code += 'PyJsLvalTempHoisted.func_name = %s\n' % repr(nested_name)
defs += new_code + '\nvar.put(%s, PyJsLvalTempHoisted)\n' % repr(
nested_name)
# defs += '# Everting ready!\n'
# inline functions recovery
for nested_name, nested_info in inline.iteritems():
nested_block, nested_args = nested_info
new_code = translate_func(nested_name, nested_block, nested_args)
py_seed = inject_before_lval(py_seed,
nested_name.split('@')[0], new_code)
# add hoisted definitiond - they have literals that have to be recovered
py_seed = defs + py_seed
# Recover arrays
for arr_lval, arr_code in arrays.iteritems():
translation, obj_count, arr_count = translate_array(
arr_code, arr_lval, obj_count, arr_count)
py_seed = inject_before_lval(py_seed, arr_lval, translation)
# Recover objects
for obj_lval, obj_code in objects.iteritems():
translation, obj_count, arr_count = translate_object(
obj_code, obj_lval, obj_count, arr_count)
py_seed = inject_before_lval(py_seed, obj_lval, translation)
# Recover constants
py_code = recover_constants(py_seed, constants)
return top + py_code