--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/svgui/pyjs/pyjs.py Sat May 12 11:21:10 2012 +0200
@@ -0,0 +1,1777 @@
+#!/usr/bin/env python
+# Copyright 2006 James Tauber and contributors
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+
+import sys
+from types import StringType
+import compiler
+from compiler import ast
+import os
+import copy
+
+# the standard location for builtins (e.g. pyjslib) can be
+# over-ridden by changing this. it defaults to sys.prefix
+# so that on a system-wide install of pyjamas the builtins
+# can be found in e.g. {sys.prefix}/share/pyjamas
+#
+# over-rides can be done by either explicitly modifying
+# pyjs.prefix or by setting an environment variable, PYJSPREFIX.
+
+prefix = sys.prefix
+
+if os.environ.has_key('PYJSPREFIX'):
+ prefix = os.environ['PYJSPREFIX']
+
+# pyjs.path is the list of paths, just like sys.path, from which
+# library modules will be searched for, for compile purposes.
+# obviously we don't want to use sys.path because that would result
+# in compiling standard python modules into javascript!
+
+path = [os.path.abspath('')]
+
+if os.environ.has_key('PYJSPATH'):
+ for p in os.environ['PYJSPATH'].split(os.pathsep):
+ p = os.path.abspath(p)
+ if os.path.isdir(p):
+ path.append(p)
+
+# this is the python function used to wrap native javascript
+NATIVE_JS_FUNC_NAME = "JS"
+
+UU = ""
+
+PYJSLIB_BUILTIN_FUNCTIONS=("cmp",
+ "map",
+ "filter",
+ "dir",
+ "getattr",
+ "setattr",
+ "hasattr",
+ "int",
+ "float",
+ "str",
+ "repr",
+ "range",
+ "len",
+ "hash",
+ "abs",
+ "ord",
+ "chr",
+ "enumerate",
+ "min",
+ "max",
+ "bool",
+ "type",
+ "isinstance")
+
+PYJSLIB_BUILTIN_CLASSES=("BaseException",
+ "Exception",
+ "StandardError",
+ "StopIteration",
+ "AttributeError",
+ "TypeError",
+ "KeyError",
+ "LookupError",
+ "list",
+ "dict",
+ "object",
+ "tuple",
+ )
+
+def pyjs_builtin_remap(name):
+ # XXX HACK!
+ if name == 'list':
+ name = 'List'
+ if name == 'object':
+ name = '__Object'
+ if name == 'dict':
+ name = 'Dict'
+ if name == 'tuple':
+ name = 'Tuple'
+ return name
+
+# XXX: this is a hack: these should be dealt with another way
+# however, console is currently the only global name which is causing
+# problems.
+PYJS_GLOBAL_VARS=("console")
+
+# This is taken from the django project.
+# Escape every ASCII character with a value less than 32.
+JS_ESCAPES = (
+ ('\\', r'\x5C'),
+ ('\'', r'\x27'),
+ ('"', r'\x22'),
+ ('>', r'\x3E'),
+ ('<', r'\x3C'),
+ ('&', r'\x26'),
+ (';', r'\x3B')
+ ) + tuple([('%c' % z, '\\x%02X' % z) for z in range(32)])
+
+def escapejs(value):
+ """Hex encodes characters for use in JavaScript strings."""
+ for bad, good in JS_ESCAPES:
+ value = value.replace(bad, good)
+ return value
+
+def uuprefix(name, leave_alone=0):
+ name = name.split(".")
+ name = name[:leave_alone] + map(lambda x: "__%s" % x, name[leave_alone:])
+ return '.'.join(name)
+
+class Klass:
+
+ klasses = {}
+
+ def __init__(self, name, name_):
+ self.name = name
+ self.name_ = name_
+ self.klasses[name] = self
+ self.functions = set()
+
+ def set_base(self, base_name):
+ self.base = self.klasses.get(base_name)
+
+ def add_function(self, function_name):
+ self.functions.add(function_name)
+
+
+class TranslationError(Exception):
+ def __init__(self, message, node):
+ self.message = "line %s:\n%s\n%s" % (node.lineno, message, node)
+
+ def __str__(self):
+ return self.message
+
+def strip_py(name):
+ return name
+
+def mod_var_name_decl(raw_module_name):
+ """ function to get the last component of the module e.g.
+ pyjamas.ui.DOM into the "namespace". i.e. doing
+ "import pyjamas.ui.DOM" actually ends up with _two_
+ variables - one pyjamas.ui.DOM, the other just "DOM".
+ but "DOM" is actually local, hence the "var" prefix.
+
+ for PyV8, this might end up causing problems - we'll have
+ to see: gen_mod_import and mod_var_name_decl might have
+ to end up in a library-specific module, somewhere.
+ """
+ name = raw_module_name.split(".")
+ if len(name) == 1:
+ return ''
+ child_name = name[-1]
+ return "var %s = %s;\n" % (child_name, raw_module_name)
+
+def gen_mod_import(parentName, importName, dynamic=1):
+ #pyjs_ajax_eval("%(n)s.cache.js", null, true);
+ return """
+ pyjslib.import_module(sys.loadpath, '%(p)s', '%(n)s', %(d)d, false);
+ """ % ({'p': parentName, 'd': dynamic, 'n': importName}) + \
+ mod_var_name_decl(importName)
+
+class Translator:
+
+ def __init__(self, mn, module_name, raw_module_name, src, debug, mod, output,
+ dynamic=0, optimize=False,
+ findFile=None):
+
+ if module_name:
+ self.module_prefix = module_name + "."
+ else:
+ self.module_prefix = ""
+ self.raw_module_name = raw_module_name
+ src = src.replace("\r\n", "\n")
+ src = src.replace("\n\r", "\n")
+ src = src.replace("\r", "\n")
+ self.src = src.split("\n")
+ self.debug = debug
+ self.imported_modules = []
+ self.imported_modules_as = []
+ self.imported_js = set()
+ self.top_level_functions = set()
+ self.top_level_classes = set()
+ self.top_level_vars = set()
+ self.local_arg_stack = [[]]
+ self.output = output
+ self.imported_classes = {}
+ self.method_imported_globals = set()
+ self.method_self = None
+ self.nextTupleAssignID = 1
+ self.dynamic = dynamic
+ self.optimize = optimize
+ self.findFile = findFile
+
+ if module_name.find(".") >= 0:
+ vdec = ''
+ else:
+ vdec = 'var '
+ print >>self.output, UU+"%s%s = function (__mod_name__) {" % (vdec, module_name)
+
+ print >>self.output, " if("+module_name+".__was_initialized__) return;"
+ print >>self.output, " "+UU+module_name+".__was_initialized__ = true;"
+ print >>self.output, UU+"if (__mod_name__ == null) __mod_name__ = '%s';" % (mn)
+ print >>self.output, UU+"%s.__name__ = __mod_name__;" % (raw_module_name)
+
+ decl = mod_var_name_decl(raw_module_name)
+ if decl:
+ print >>self.output, decl
+
+
+ if self.debug:
+ haltException = self.module_prefix + "HaltException"
+ print >>self.output, haltException + ' = function () {'
+ print >>self.output, ' this.message = "Program Halted";'
+ print >>self.output, ' this.name = "' + haltException + '";'
+ print >>self.output, '}'
+ print >>self.output, ''
+ print >>self.output, haltException + ".prototype.__str__ = function()"
+ print >>self.output, '{'
+ print >>self.output, 'return this.message ;'
+ print >>self.output, '}'
+
+ print >>self.output, haltException + ".prototype.toString = function()"
+ print >>self.output, '{'
+ print >>self.output, 'return this.name + ": \\"" + this.message + "\\"";'
+ print >>self.output, '}'
+
+ isHaltFunction = self.module_prefix + "IsHaltException"
+ print >>self.output, """
+ %s = function (s) {
+ var suffix="HaltException";
+ if (s.length < suffix.length) {
+ //alert(s + " " + suffix);
+ return false;
+ } else {
+ var ss = s.substring(s.length, (s.length - suffix.length));
+ //alert(s + " " + suffix + " " + ss);
+ return ss == suffix;
+ }
+ }
+ """ % isHaltFunction
+ for child in mod.node:
+ if isinstance(child, ast.Function):
+ self.top_level_functions.add(child.name)
+ elif isinstance(child, ast.Class):
+ self.top_level_classes.add(child.name)
+
+ for child in mod.node:
+ if isinstance(child, ast.Function):
+ self._function(child, False)
+ elif isinstance(child, ast.Class):
+ self._class(child)
+ elif isinstance(child, ast.Import):
+ importName = child.names[0][0]
+ if importName == '__pyjamas__': # special module to help make pyjamas modules loadable in the python interpreter
+ pass
+ elif importName.endswith('.js'):
+ self.imported_js.add(importName)
+ else:
+ self.add_imported_module(strip_py(importName))
+ elif isinstance(child, ast.From):
+ if child.modname == '__pyjamas__': # special module to help make pyjamas modules loadable in the python interpreter
+ pass
+ else:
+ self.add_imported_module(child.modname)
+ self._from(child)
+ elif isinstance(child, ast.Discard):
+ self._discard(child, None)
+ elif isinstance(child, ast.Assign):
+ self._assign(child, None, True)
+ elif isinstance(child, ast.AugAssign):
+ self._augassign(child, None)
+ elif isinstance(child, ast.If):
+ self._if(child, None)
+ elif isinstance(child, ast.For):
+ self._for(child, None)
+ elif isinstance(child, ast.While):
+ self._while(child, None)
+ elif isinstance(child, ast.Subscript):
+ self._subscript_stmt(child, None)
+ elif isinstance(child, ast.Global):
+ self._global(child, None)
+ elif isinstance(child, ast.Printnl):
+ self._print(child, None)
+ elif isinstance(child, ast.Print):
+ self._print(child, None)
+ elif isinstance(child, ast.TryExcept):
+ self._tryExcept(child, None)
+ elif isinstance(child, ast.Raise):
+ self._raise(child, None)
+ elif isinstance(child, ast.Stmt):
+ self._stmt(child, None)
+ else:
+ raise TranslationError("unsupported type (in __init__)", child)
+
+ # Initialize all classes for this module
+ #print >> self.output, "__"+self.modpfx()+\
+ # "classes_initialize = function() {\n"
+ #for className in self.top_level_classes:
+ # print >> self.output, "\t"+UU+self.modpfx()+"__"+className+"_initialize();"
+ #print >> self.output, "};\n"
+
+ print >> self.output, "return this;\n"
+ print >> self.output, "}; /* end %s */ \n" % module_name
+
+ def module_imports(self):
+ return self.imported_modules + self.imported_modules_as
+
+ def add_local_arg(self, varname):
+ local_vars = self.local_arg_stack[-1]
+ if varname not in local_vars:
+ local_vars.append(varname)
+
+ def add_imported_module(self, importName):
+
+ if importName in self.imported_modules:
+ return
+ self.imported_modules.append(importName)
+ name = importName.split(".")
+ if len(name) != 1:
+ # add the name of the module to the namespace,
+ # but don't add the short name to imported_modules
+ # because then the short name would be attempted to be
+ # added to the dependencies, and it's half way up the
+ # module import directory structure!
+ child_name = name[-1]
+ self.imported_modules_as.append(child_name)
+ print >> self.output, gen_mod_import(self.raw_module_name,
+ strip_py(importName),
+ self.dynamic)
+
+ def _default_args_handler(self, node, arg_names, current_klass,
+ output=None):
+ if len(node.defaults):
+ output = output or self.output
+ default_pos = len(arg_names) - len(node.defaults)
+ if arg_names and arg_names[0] == self.method_self:
+ default_pos -= 1
+ for default_node in node.defaults:
+ if isinstance(default_node, ast.Const):
+ default_value = self._const(default_node)
+ elif isinstance(default_node, ast.Name):
+ default_value = self._name(default_node, current_klass)
+ elif isinstance(default_node, ast.UnarySub):
+ default_value = self._unarysub(default_node, current_klass)
+ else:
+ raise TranslationError("unsupported type (in _method)", default_node)
+
+ default_name = arg_names[default_pos]
+ default_pos += 1
+ print >> output, " if (typeof %s == 'undefined') %s=%s;" % (default_name, default_name, default_value)
+
+ def _varargs_handler(self, node, varargname, arg_names, current_klass):
+ print >>self.output, " var", varargname, '= new pyjslib.Tuple();'
+ print >>self.output, " for(var __va_arg="+str(len(arg_names))+"; __va_arg < arguments.length; __va_arg++) {"
+ print >>self.output, " var __arg = arguments[__va_arg];"
+ print >>self.output, " "+varargname+".append(__arg);"
+ print >>self.output, " }"
+
+ def _kwargs_parser(self, node, function_name, arg_names, current_klass):
+ if len(node.defaults) or node.kwargs:
+ default_pos = len(arg_names) - len(node.defaults)
+ if arg_names and arg_names[0] == self.method_self:
+ default_pos -= 1
+ print >>self.output, function_name+'.parse_kwargs = function (', ", ".join(["__kwargs"]+arg_names), ") {"
+ for default_node in node.defaults:
+ default_value = self.expr(default_node, current_klass)
+# if isinstance(default_node, ast.Const):
+# default_value = self._const(default_node)
+# elif isinstance(default_node, ast.Name):
+# default_value = self._name(default_node)
+# elif isinstance(default_node, ast.UnarySub):
+# default_value = self._unarysub(default_node, current_klass)
+# else:
+# raise TranslationError("unsupported type (in _method)", default_node)
+
+ default_name = arg_names[default_pos]
+ print >>self.output, " if (typeof %s == 'undefined')"%(default_name)
+ print >>self.output, " %s=__kwargs.%s;"% (default_name, default_name)
+ default_pos += 1
+
+ #self._default_args_handler(node, arg_names, current_klass)
+ if node.kwargs: arg_names += ["pyjslib.Dict(__kwargs)"]
+ print >>self.output, " var __r = "+"".join(["[", ", ".join(arg_names), "]"])+";"
+ if node.varargs:
+ self._varargs_handler(node, "__args", arg_names, current_klass)
+ print >>self.output, " __r.push.apply(__r, __args.getArray())"
+ print >>self.output, " return __r;"
+ print >>self.output, "};"
+
+ def _function(self, node, local=False):
+ if local:
+ function_name = node.name
+ self.add_local_arg(function_name)
+ else:
+ function_name = UU + self.modpfx() + node.name
+
+ arg_names = list(node.argnames)
+ normal_arg_names = list(arg_names)
+ if node.kwargs: kwargname = normal_arg_names.pop()
+ if node.varargs: varargname = normal_arg_names.pop()
+ declared_arg_names = list(normal_arg_names)
+ if node.kwargs: declared_arg_names.append(kwargname)
+
+ function_args = "(" + ", ".join(declared_arg_names) + ")"
+ print >>self.output, "%s = function%s {" % (function_name, function_args)
+ self._default_args_handler(node, normal_arg_names, None)
+
+ local_arg_names = normal_arg_names + declared_arg_names
+
+ if node.varargs:
+ self._varargs_handler(node, varargname, declared_arg_names, None)
+ local_arg_names.append(varargname)
+
+ # stack of local variable names for this function call
+ self.local_arg_stack.append(local_arg_names)
+
+ for child in node.code:
+ self._stmt(child, None)
+
+ # remove the top local arg names
+ self.local_arg_stack.pop()
+
+ # we need to return null always, so it is not undefined
+ lastStmt = [p for p in node.code][-1]
+ if not isinstance(lastStmt, ast.Return):
+ if not self._isNativeFunc(lastStmt):
+ print >>self.output, " return null;"
+
+ print >>self.output, "};"
+ print >>self.output, "%s.__name__ = '%s';\n" % (function_name, node.name)
+
+
+ self._kwargs_parser(node, function_name, normal_arg_names, None)
+
+
+ def _return(self, node, current_klass):
+ expr = self.expr(node.value, current_klass)
+ # in python a function call always returns None, so we do it
+ # here too
+ print >>self.output, " return " + expr + ";"
+
+
+ def _break(self, node, current_klass):
+ print >>self.output, " break;"
+
+
+ def _continue(self, node, current_klass):
+ print >>self.output, " continue;"
+
+
+ def _callfunc(self, v, current_klass):
+
+ if isinstance(v.node, ast.Name):
+ if v.node.name in self.top_level_functions:
+ call_name = self.modpfx() + v.node.name
+ elif v.node.name in self.top_level_classes:
+ call_name = self.modpfx() + v.node.name
+ elif self.imported_classes.has_key(v.node.name):
+ call_name = self.imported_classes[v.node.name] + '.' + v.node.name
+ elif v.node.name in PYJSLIB_BUILTIN_FUNCTIONS:
+ call_name = 'pyjslib.' + v.node.name
+ elif v.node.name in PYJSLIB_BUILTIN_CLASSES:
+ name = pyjs_builtin_remap(v.node.name)
+ call_name = 'pyjslib.' + name
+ elif v.node.name == "callable":
+ call_name = "pyjslib.isFunction"
+ else:
+ call_name = v.node.name
+ call_args = []
+ elif isinstance(v.node, ast.Getattr):
+ attr_name = v.node.attrname
+
+ if isinstance(v.node.expr, ast.Name):
+ call_name = self._name2(v.node.expr, current_klass, attr_name)
+ call_args = []
+ elif isinstance(v.node.expr, ast.Getattr):
+ call_name = self._getattr2(v.node.expr, current_klass, attr_name)
+ call_args = []
+ elif isinstance(v.node.expr, ast.CallFunc):
+ call_name = self._callfunc(v.node.expr, current_klass) + "." + v.node.attrname
+ call_args = []
+ elif isinstance(v.node.expr, ast.Subscript):
+ call_name = self._subscript(v.node.expr, current_klass) + "." + v.node.attrname
+ call_args = []
+ elif isinstance(v.node.expr, ast.Const):
+ call_name = self.expr(v.node.expr, current_klass) + "." + v.node.attrname
+ call_args = []
+ else:
+ raise TranslationError("unsupported type (in _callfunc)", v.node.expr)
+ else:
+ raise TranslationError("unsupported type (in _callfunc)", v.node)
+
+ call_name = strip_py(call_name)
+
+ kwargs = []
+ star_arg_name = None
+ if v.star_args:
+ star_arg_name = self.expr(v.star_args, current_klass)
+
+ for ch4 in v.args:
+ if isinstance(ch4, ast.Keyword):
+ kwarg = ch4.name + ":" + self.expr(ch4.expr, current_klass)
+ kwargs.append(kwarg)
+ else:
+ arg = self.expr(ch4, current_klass)
+ call_args.append(arg)
+
+ if kwargs:
+ fn_args = ", ".join(['{' + ', '.join(kwargs) + '}']+call_args)
+ else:
+ fn_args = ", ".join(call_args)
+
+ if kwargs or star_arg_name:
+ if not star_arg_name:
+ star_arg_name = 'null'
+ try: call_this, method_name = call_name.rsplit(".", 1)
+ except ValueError:
+ # Must be a function call ...
+ return ("pyjs_kwargs_function_call("+call_name+", "
+ + star_arg_name
+ + ", ["+fn_args+"]"
+ + ")" )
+ else:
+ return ("pyjs_kwargs_method_call("+call_this+", '"+method_name+"', "
+ + star_arg_name
+ + ", ["+fn_args+"]"
+ + ")")
+ else:
+ return call_name + "(" + ", ".join(call_args) + ")"
+
+ def _print(self, node, current_klass):
+ if self.optimize:
+ return
+ call_args = []
+ for ch4 in node.nodes:
+ arg = self.expr(ch4, current_klass)
+ call_args.append(arg)
+
+ print >>self.output, "pyjslib.printFunc([", ', '.join(call_args), "],", int(isinstance(node, ast.Printnl)), ");"
+
+ def _tryExcept(self, node, current_klass):
+ if len(node.handlers) != 1:
+ raise TranslationError("except statements in this form are" +
+ " not supported", node)
+
+ expr = node.handlers[0][0]
+ as_ = node.handlers[0][1]
+ if as_:
+ errName = as_.name
+ else:
+ errName = 'err'
+
+ # XXX TODO: check that this should instead be added as a _separate_
+ # local scope, temporary to the function. oh dearie me.
+ self.add_local_arg(errName)
+
+ print >>self.output, " try {"
+ for stmt in node.body.nodes:
+ self._stmt(stmt, current_klass)
+ print >> self.output, " } catch(%s) {" % errName
+ if expr:
+ l = []
+ if isinstance(expr, ast.Tuple):
+ for x in expr.nodes:
+ l.append("(%(err)s.__name__ == %(expr)s.__name__)" % dict (err=errName, expr=self.expr(x, current_klass)))
+ else:
+ l = [ " (%(err)s.__name__ == %(expr)s.__name__) " % dict (err=errName, expr=self.expr(expr, current_klass)) ]
+ print >> self.output, " if(%s) {" % '||\n\t\t'.join(l)
+ for stmt in node.handlers[0][2]:
+ self._stmt(stmt, current_klass)
+ if expr:
+ #print >> self.output, "} else { throw(%s); } " % errName
+ print >> self.output, "}"
+ if node.else_ != None:
+ print >>self.output, " } finally {"
+ for stmt in node.else_:
+ self._stmt(stmt, current_klass)
+ print >>self.output, " }"
+
+ # XXX: change use_getattr to True to enable "strict" compilation
+ # but incurring a 100% performance penalty. oops.
+ def _getattr(self, v, current_klass, use_getattr=False):
+ attr_name = v.attrname
+ if isinstance(v.expr, ast.Name):
+ obj = self._name(v.expr, current_klass, return_none_for_module=True)
+ if obj == None and v.expr.name in self.module_imports():
+ # XXX TODO: distinguish between module import classes
+ # and variables. right now, this is a hack to get
+ # the sys module working.
+ #if v.expr.name == 'sys':
+ return v.expr.name+'.'+attr_name
+ #return v.expr.name+'.__'+attr_name+'.prototype.__class__'
+ if not use_getattr or attr_name == '__class__' or \
+ attr_name == '__name__':
+ return obj + "." + attr_name
+ return "pyjslib.getattr(%s, '%s')" % (obj, attr_name)
+ elif isinstance(v.expr, ast.Getattr):
+ return self._getattr(v.expr, current_klass) + "." + attr_name
+ elif isinstance(v.expr, ast.Subscript):
+ return self._subscript(v.expr, self.modpfx()) + "." + attr_name
+ elif isinstance(v.expr, ast.CallFunc):
+ return self._callfunc(v.expr, self.modpfx()) + "." + attr_name
+ else:
+ raise TranslationError("unsupported type (in _getattr)", v.expr)
+
+
+ def modpfx(self):
+ return strip_py(self.module_prefix)
+
+ def _name(self, v, current_klass, top_level=False,
+ return_none_for_module=False):
+
+ if v.name == 'ilikesillynamesfornicedebugcode':
+ print top_level, current_klass, repr(v)
+ print self.top_level_vars
+ print self.top_level_functions
+ print self.local_arg_stack
+ print "error..."
+
+ local_var_names = None
+ las = len(self.local_arg_stack)
+ if las > 0:
+ local_var_names = self.local_arg_stack[-1]
+
+ if v.name == "True":
+ return "true"
+ elif v.name == "False":
+ return "false"
+ elif v.name == "None":
+ return "null"
+ elif v.name == '__name__' and current_klass is None:
+ return self.modpfx() + v.name
+ elif v.name == self.method_self:
+ return "this"
+ elif v.name in self.top_level_functions:
+ return UU+self.modpfx() + v.name
+ elif v.name in self.method_imported_globals:
+ return UU+self.modpfx() + v.name
+ elif not current_klass and las == 1 and v.name in self.top_level_vars:
+ return UU+self.modpfx() + v.name
+ elif v.name in local_var_names:
+ return v.name
+ elif self.imported_classes.has_key(v.name):
+ return UU+self.imported_classes[v.name] + '.__' + v.name + ".prototype.__class__"
+ elif v.name in self.top_level_classes:
+ return UU+self.modpfx() + "__" + v.name + ".prototype.__class__"
+ elif v.name in self.module_imports() and return_none_for_module:
+ return None
+ elif v.name in PYJSLIB_BUILTIN_CLASSES:
+ return "pyjslib." + pyjs_builtin_remap( v.name )
+ elif current_klass:
+ if v.name not in local_var_names and \
+ v.name not in self.top_level_vars and \
+ v.name not in PYJS_GLOBAL_VARS and \
+ v.name not in self.top_level_functions:
+
+ cls_name = current_klass
+ if hasattr(cls_name, "name"):
+ cls_name_ = cls_name.name_
+ cls_name = cls_name.name
+ else:
+ cls_name_ = current_klass + "_" # XXX ???
+ name = UU+cls_name_ + ".prototype.__class__." \
+ + v.name
+ if v.name == 'listener':
+ name = 'listener+' + name
+ return name
+
+ return v.name
+
+ def _name2(self, v, current_klass, attr_name):
+ obj = v.name
+
+ if obj in self.method_imported_globals:
+ call_name = UU+self.modpfx() + obj + "." + attr_name
+ elif self.imported_classes.has_key(obj):
+ #attr_str = ""
+ #if attr_name != "__init__":
+ attr_str = ".prototype.__class__." + attr_name
+ call_name = UU+self.imported_classes[obj] + '.__' + obj + attr_str
+ elif obj in self.module_imports():
+ call_name = obj + "." + attr_name
+ elif obj[0] == obj[0].upper(): # XXX HACK ALERT
+ call_name = UU + self.modpfx() + "__" + obj + ".prototype.__class__." + attr_name
+ else:
+ call_name = UU+self._name(v, current_klass) + "." + attr_name
+
+ return call_name
+
+
+ def _getattr2(self, v, current_klass, attr_name):
+ if isinstance(v.expr, ast.Getattr):
+ call_name = self._getattr2(v.expr, current_klass, v.attrname + "." + attr_name)
+ elif isinstance(v.expr, ast.Name) and v.expr.name in self.module_imports():
+ call_name = UU+v.expr.name + '.__' +v.attrname+".prototype.__class__."+attr_name
+ else:
+ obj = self.expr(v.expr, current_klass)
+ call_name = obj + "." + v.attrname + "." + attr_name
+
+ return call_name
+
+
+ def _class(self, node):
+ """
+ Handle a class definition.
+
+ In order to translate python semantics reasonably well, the following
+ structure is used:
+
+ A special object is created for the class, which inherits attributes
+ from the superclass, or Object if there's no superclass. This is the
+ class object; the object which you refer to when specifying the
+ class by name. Static, class, and unbound methods are copied
+ from the superclass object.
+
+ A special constructor function is created with the same name as the
+ class, which is used to create instances of that class.
+
+ A javascript class (e.g. a function with a prototype attribute) is
+ created which is the javascript class of created instances, and
+ which inherits attributes from the class object. Bound methods are
+ copied from the superclass into this class rather than inherited,
+ because the class object contains unbound, class, and static methods
+ that we don't necessarily want to inherit.
+
+ The type of a method can now be determined by inspecting its
+ static_method, unbound_method, class_method, or instance_method
+ attribute; only one of these should be true.
+
+ Much of this work is done in pyjs_extend, is pyjslib.py
+ """
+ class_name = self.modpfx() + uuprefix(node.name, 1)
+ class_name_ = self.modpfx() + uuprefix(node.name)
+ current_klass = Klass(class_name, class_name_)
+ init_method = None
+ for child in node.code:
+ if isinstance(child, ast.Function):
+ current_klass.add_function(child.name)
+ if child.name == "__init__":
+ init_method = child
+
+
+ if len(node.bases) == 0:
+ base_class = "pyjslib.__Object"
+ elif len(node.bases) == 1:
+ if isinstance(node.bases[0], ast.Name):
+ if self.imported_classes.has_key(node.bases[0].name):
+ base_class_ = self.imported_classes[node.bases[0].name] + '.__' + node.bases[0].name
+ base_class = self.imported_classes[node.bases[0].name] + '.' + node.bases[0].name
+ else:
+ base_class_ = self.modpfx() + "__" + node.bases[0].name
+ base_class = self.modpfx() + node.bases[0].name
+ elif isinstance(node.bases[0], ast.Getattr):
+ # the bases are not in scope of the class so do not
+ # pass our class to self._name
+ base_class_ = self._name(node.bases[0].expr, None) + \
+ ".__" + node.bases[0].attrname
+ base_class = self._name(node.bases[0].expr, None) + \
+ "." + node.bases[0].attrname
+ else:
+ raise TranslationError("unsupported type (in _class)", node.bases[0])
+
+ current_klass.set_base(base_class)
+ else:
+ raise TranslationError("more than one base (in _class)", node)
+
+ print >>self.output, UU+class_name_ + " = function () {"
+ # call superconstructor
+ #if base_class:
+ # print >>self.output, " __" + base_class + ".call(this);"
+ print >>self.output, "}"
+
+ if not init_method:
+ init_method = ast.Function([], "__init__", ["self"], [], 0, None, [])
+ #self._method(init_method, current_klass, class_name)
+
+ # Generate a function which constructs the object
+ clsfunc = ast.Function([],
+ node.name,
+ init_method.argnames[1:],
+ init_method.defaults,
+ init_method.flags,
+ None,
+ [ast.Discard(ast.CallFunc(ast.Name("JS"), [ast.Const(
+# I attempted lazy initialization, but then you can't access static class members
+# " if(!__"+base_class+".__was_initialized__)"+
+# " __" + class_name + "_initialize();\n" +
+ " var instance = new " + UU + class_name_ + "();\n" +
+ " if(instance.__init__) instance.__init__.apply(instance, arguments);\n" +
+ " return instance;"
+ )]))])
+
+ self._function(clsfunc, False)
+ print >>self.output, UU+class_name_ + ".__initialize__ = function () {"
+ print >>self.output, " if("+UU+class_name_+".__was_initialized__) return;"
+ print >>self.output, " "+UU+class_name_+".__was_initialized__ = true;"
+ cls_obj = UU+class_name_ + '.prototype.__class__'
+
+ if class_name == "pyjslib.__Object":
+ print >>self.output, " "+cls_obj+" = {};"
+ else:
+ if base_class and base_class not in ("object", "pyjslib.__Object"):
+ print >>self.output, " if(!"+UU+base_class_+".__was_initialized__)"
+ print >>self.output, " "+UU+base_class_+".__initialize__();"
+ print >>self.output, " pyjs_extend(" + UU+class_name_ + ", "+UU+base_class_+");"
+ else:
+ print >>self.output, " pyjs_extend(" + UU+class_name_ + ", "+UU+"pyjslib.__Object);"
+
+ print >>self.output, " "+cls_obj+".__new__ = "+UU+class_name+";"
+ print >>self.output, " "+cls_obj+".__name__ = '"+UU+node.name+"';"
+
+ for child in node.code:
+ if isinstance(child, ast.Pass):
+ pass
+ elif isinstance(child, ast.Function):
+ self._method(child, current_klass, class_name, class_name_)
+ elif isinstance(child, ast.Assign):
+ self.classattr(child, current_klass)
+ elif isinstance(child, ast.Discard) and isinstance(child.expr, ast.Const):
+ # Probably a docstring, turf it
+ pass
+ else:
+ raise TranslationError("unsupported type (in _class)", child)
+ print >>self.output, "}"
+
+ print >> self.output, class_name_+".__initialize__();"
+
+
+ def classattr(self, node, current_klass):
+ self._assign(node, current_klass, True)
+
+ def _raise(self, node, current_klass):
+ if node.expr2:
+ raise TranslationError("More than one expression unsupported",
+ node)
+ print >> self.output, "throw (%s);" % self.expr(
+ node.expr1, current_klass)
+
+ def _method(self, node, current_klass, class_name, class_name_):
+ # reset global var scope
+ self.method_imported_globals = set()
+
+ arg_names = list(node.argnames)
+
+ classmethod = False
+ staticmethod = False
+ if node.decorators:
+ for d in node.decorators:
+ if d.name == "classmethod":
+ classmethod = True
+ elif d.name == "staticmethod":
+ staticmethod = True
+
+ if staticmethod:
+ staticfunc = ast.Function([], class_name_+"."+node.name, node.argnames, node.defaults, node.flags, node.doc, node.code, node.lineno)
+ self._function(staticfunc, True)
+ print >>self.output, " " + UU+class_name_ + ".prototype.__class__." + node.name + " = " + class_name_+"."+node.name+";";
+ print >>self.output, " " + UU+class_name_ + ".prototype.__class__." + node.name + ".static_method = true;";
+ return
+ else:
+ if len(arg_names) == 0:
+ raise TranslationError("methods must take an argument 'self' (in _method)", node)
+ self.method_self = arg_names[0]
+
+ #if not classmethod and arg_names[0] != "self":
+ # raise TranslationError("first arg not 'self' (in _method)", node)
+
+ normal_arg_names = arg_names[1:]
+ if node.kwargs: kwargname = normal_arg_names.pop()
+ if node.varargs: varargname = normal_arg_names.pop()
+ declared_arg_names = list(normal_arg_names)
+ if node.kwargs: declared_arg_names.append(kwargname)
+
+ function_args = "(" + ", ".join(declared_arg_names) + ")"
+
+ if classmethod:
+ fexpr = UU + class_name_ + ".prototype.__class__." + node.name
+ else:
+ fexpr = UU + class_name_ + ".prototype." + node.name
+ print >>self.output, " "+fexpr + " = function" + function_args + " {"
+
+ # default arguments
+ self._default_args_handler(node, normal_arg_names, current_klass)
+
+ local_arg_names = normal_arg_names + declared_arg_names
+
+ if node.varargs:
+ self._varargs_handler(node, varargname, declared_arg_names, current_klass)
+ local_arg_names.append(varargname)
+
+
+ # stack of local variable names for this function call
+ self.local_arg_stack.append(local_arg_names)
+
+ for child in node.code:
+ self._stmt(child, current_klass)
+
+ # remove the top local arg names
+ self.local_arg_stack.pop()
+
+ print >>self.output, " };"
+
+ self._kwargs_parser(node, fexpr, normal_arg_names, current_klass)
+
+ if classmethod:
+ # Have to create a version on the instances which automatically passes the
+ # class as "self"
+ altexpr = UU + class_name_ + ".prototype." + node.name
+ print >>self.output, " "+altexpr + " = function() {"
+ print >>self.output, " return " + fexpr + ".apply(this.__class__, arguments);"
+ print >>self.output, " };"
+ print >>self.output, " "+fexpr+".class_method = true;"
+ print >>self.output, " "+altexpr+".instance_method = true;"
+ else:
+ # For instance methods, we need an unbound version in the class object
+ altexpr = UU + class_name_ + ".prototype.__class__." + node.name
+ print >>self.output, " "+altexpr + " = function() {"
+ print >>self.output, " return " + fexpr + ".call.apply("+fexpr+", arguments);"
+ print >>self.output, " };"
+ print >>self.output, " "+altexpr+".unbound_method = true;"
+ print >>self.output, " "+fexpr+".instance_method = true;"
+ print >>self.output, " "+altexpr+".__name__ = '%s';" % node.name
+
+ print >>self.output, UU + class_name_ + ".prototype.%s.__name__ = '%s';" % \
+ (node.name, node.name)
+
+ if node.kwargs or len(node.defaults):
+ print >>self.output, " "+altexpr + ".parse_kwargs = " + fexpr + ".parse_kwargs;"
+
+ self.method_self = None
+ self.method_imported_globals = set()
+
+ def _isNativeFunc(self, node):
+ if isinstance(node, ast.Discard):
+ if isinstance(node.expr, ast.CallFunc):
+ if isinstance(node.expr.node, ast.Name) and \
+ node.expr.node.name == NATIVE_JS_FUNC_NAME:
+ return True
+ return False
+
+ def _stmt(self, node, current_klass):
+ debugStmt = self.debug and not self._isNativeFunc(node)
+ if debugStmt:
+ print >>self.output, ' try {'
+
+ if isinstance(node, ast.Return):
+ self._return(node, current_klass)
+ elif isinstance(node, ast.Break):
+ self._break(node, current_klass)
+ elif isinstance(node, ast.Continue):
+ self._continue(node, current_klass)
+ elif isinstance(node, ast.Assign):
+ self._assign(node, current_klass)
+ elif isinstance(node, ast.AugAssign):
+ self._augassign(node, current_klass)
+ elif isinstance(node, ast.Discard):
+ self._discard(node, current_klass)
+ elif isinstance(node, ast.If):
+ self._if(node, current_klass)
+ elif isinstance(node, ast.For):
+ self._for(node, current_klass)
+ elif isinstance(node, ast.While):
+ self._while(node, current_klass)
+ elif isinstance(node, ast.Subscript):
+ self._subscript_stmt(node, current_klass)
+ elif isinstance(node, ast.Global):
+ self._global(node, current_klass)
+ elif isinstance(node, ast.Pass):
+ pass
+ elif isinstance(node, ast.Function):
+ self._function(node, True)
+ elif isinstance(node, ast.Printnl):
+ self._print(node, current_klass)
+ elif isinstance(node, ast.Print):
+ self._print(node, current_klass)
+ elif isinstance(node, ast.TryExcept):
+ self._tryExcept(node, current_klass)
+ elif isinstance(node, ast.Raise):
+ self._raise(node, current_klass)
+ else:
+ raise TranslationError("unsupported type (in _stmt)", node)
+
+ if debugStmt:
+
+ lt = self.get_line_trace(node)
+
+ haltException = self.module_prefix + "HaltException"
+ isHaltFunction = self.module_prefix + "IsHaltException"
+
+ print >>self.output, ' } catch (__err) {'
+ print >>self.output, ' if (' + isHaltFunction + '(__err.name)) {'
+ print >>self.output, ' throw __err;'
+ print >>self.output, ' } else {'
+ print >>self.output, " st = sys.printstack() + "\
+ + '"%s"' % lt + "+ '\\n' ;"
+ print >>self.output, ' alert("' + "Error in " \
+ + lt + '"' \
+ + '+"\\n"+__err.name+": "+__err.message'\
+ + '+"\\n\\nStack trace:\\n"' \
+ + '+st' \
+ + ');'
+ print >>self.output, ' debugger;'
+
+ print >>self.output, ' throw new ' + self.module_prefix + "HaltException();"
+ print >>self.output, ' }'
+ print >>self.output, ' }'
+
+
+ def get_line_trace(self, node):
+ lineNum = "Unknown"
+ srcLine = ""
+ if hasattr(node, "lineno"):
+ if node.lineno != None:
+ lineNum = node.lineno
+ srcLine = self.src[min(lineNum, len(self.src))-1]
+ srcLine = srcLine.replace('\\', '\\\\')
+ srcLine = srcLine.replace('"', '\\"')
+ srcLine = srcLine.replace("'", "\\'")
+
+ return self.raw_module_name + ".py, line " \
+ + str(lineNum) + ":"\
+ + "\\n" \
+ + " " + srcLine
+
+ def _augassign(self, node, current_klass):
+ v = node.node
+ if isinstance(v, ast.Getattr):
+ # XXX HACK! don't allow += on return result of getattr.
+ # TODO: create a temporary variable or something.
+ lhs = self._getattr(v, current_klass, False)
+ else:
+ lhs = self._name(node.node, current_klass)
+ op = node.op
+ rhs = self.expr(node.expr, current_klass)
+ print >>self.output, " " + lhs + " " + op + " " + rhs + ";"
+
+
+ def _assign(self, node, current_klass, top_level = False):
+ if len(node.nodes) != 1:
+ tempvar = '__temp'+str(node.lineno)
+ tnode = ast.Assign([ast.AssName(tempvar, "OP_ASSIGN", node.lineno)], node.expr, node.lineno)
+ self._assign(tnode, current_klass, top_level)
+ for v in node.nodes:
+ tnode2 = ast.Assign([v], ast.Name(tempvar, node.lineno), node.lineno)
+ self._assign(tnode2, current_klass, top_level)
+ return
+
+ local_var_names = None
+ if len(self.local_arg_stack) > 0:
+ local_var_names = self.local_arg_stack[-1]
+
+ def _lhsFromAttr(v, current_klass):
+ attr_name = v.attrname
+ if isinstance(v.expr, ast.Name):
+ obj = v.expr.name
+ lhs = self._name(v.expr, current_klass) + "." + attr_name
+ elif isinstance(v.expr, ast.Getattr):
+ lhs = self._getattr(v, current_klass)
+ elif isinstance(v.expr, ast.Subscript):
+ lhs = self._subscript(v.expr, current_klass) + "." + attr_name
+ else:
+ raise TranslationError("unsupported type (in _assign)", v.expr)
+ return lhs
+
+ def _lhsFromName(v, top_level, current_klass):
+ if top_level:
+ if current_klass:
+ lhs = UU+current_klass.name_ + ".prototype.__class__." \
+ + v.name
+ else:
+ self.top_level_vars.add(v.name)
+ vname = self.modpfx() + v.name
+ if not self.modpfx() and v.name not in\
+ self.method_imported_globals:
+ lhs = "var " + vname
+ else:
+ lhs = UU + vname
+ self.add_local_arg(v.name)
+ else:
+ if v.name in local_var_names:
+ lhs = v.name
+ elif v.name in self.method_imported_globals:
+ lhs = self.modpfx() + v.name
+ else:
+ lhs = "var " + v.name
+ self.add_local_arg(v.name)
+ return lhs
+
+ dbg = 0
+ v = node.nodes[0]
+ if isinstance(v, ast.AssAttr):
+ lhs = _lhsFromAttr(v, current_klass)
+ if v.flags == "OP_ASSIGN":
+ op = "="
+ else:
+ raise TranslationError("unsupported flag (in _assign)", v)
+
+ elif isinstance(v, ast.AssName):
+ lhs = _lhsFromName(v, top_level, current_klass)
+ if v.flags == "OP_ASSIGN":
+ op = "="
+ else:
+ raise TranslationError("unsupported flag (in _assign)", v)
+ elif isinstance(v, ast.Subscript):
+ if v.flags == "OP_ASSIGN":
+ obj = self.expr(v.expr, current_klass)
+ if len(v.subs) != 1:
+ raise TranslationError("must have one sub (in _assign)", v)
+ idx = self.expr(v.subs[0], current_klass)
+ value = self.expr(node.expr, current_klass)
+ print >>self.output, " " + obj + ".__setitem__(" + idx + ", " + value + ");"
+ return
+ else:
+ raise TranslationError("unsupported flag (in _assign)", v)
+ elif isinstance(v, (ast.AssList, ast.AssTuple)):
+ uniqueID = self.nextTupleAssignID
+ self.nextTupleAssignID += 1
+ tempName = "__tupleassign" + str(uniqueID) + "__"
+ print >>self.output, " var " + tempName + " = " + \
+ self.expr(node.expr, current_klass) + ";"
+ for index,child in enumerate(v.getChildNodes()):
+ rhs = tempName + ".__getitem__(" + str(index) + ")"
+
+ if isinstance(child, ast.AssAttr):
+ lhs = _lhsFromAttr(child, current_klass)
+ elif isinstance(child, ast.AssName):
+ lhs = _lhsFromName(child, top_level, current_klass)
+ elif isinstance(child, ast.Subscript):
+ if child.flags == "OP_ASSIGN":
+ obj = self.expr(child.expr, current_klass)
+ if len(child.subs) != 1:
+ raise TranslationError("must have one sub " +
+ "(in _assign)", child)
+ idx = self.expr(child.subs[0], current_klass)
+ value = self.expr(node.expr, current_klass)
+ print >>self.output, " " + obj + ".__setitem__(" \
+ + idx + ", " + rhs + ");"
+ continue
+ print >>self.output, " " + lhs + " = " + rhs + ";"
+ return
+ else:
+ raise TranslationError("unsupported type (in _assign)", v)
+
+ rhs = self.expr(node.expr, current_klass)
+ if dbg:
+ print "b", repr(node.expr), rhs
+ print >>self.output, " " + lhs + " " + op + " " + rhs + ";"
+
+
+ def _discard(self, node, current_klass):
+
+ if isinstance(node.expr, ast.CallFunc):
+ debugStmt = self.debug and not self._isNativeFunc(node)
+ if debugStmt and isinstance(node.expr.node, ast.Name) and \
+ node.expr.node.name == 'import_wait':
+ debugStmt = False
+ if debugStmt:
+ st = self.get_line_trace(node)
+ print >>self.output, "sys.addstack('%s');\n" % st
+ if isinstance(node.expr.node, ast.Name) and node.expr.node.name == NATIVE_JS_FUNC_NAME:
+ if len(node.expr.args) != 1:
+ raise TranslationError("native javascript function %s must have one arg" % NATIVE_JS_FUNC_NAME, node.expr)
+ if not isinstance(node.expr.args[0], ast.Const):
+ raise TranslationError("native javascript function %s must have constant arg" % NATIVE_JS_FUNC_NAME, node.expr)
+ raw_js = node.expr.args[0].value
+ print >>self.output, raw_js
+ else:
+ expr = self._callfunc(node.expr, current_klass)
+ print >>self.output, " " + expr + ";"
+
+ if debugStmt:
+ print >>self.output, "sys.popstack();\n"
+
+ elif isinstance(node.expr, ast.Const):
+ if node.expr.value is not None: # Empty statements generate ignore None
+ print >>self.output, self._const(node.expr)
+ else:
+ raise TranslationError("unsupported type (in _discard)", node.expr)
+
+
+ def _if(self, node, current_klass):
+ for i in range(len(node.tests)):
+ test, consequence = node.tests[i]
+ if i == 0:
+ keyword = "if"
+ else:
+ keyword = "else if"
+
+ self._if_test(keyword, test, consequence, current_klass)
+
+ if node.else_:
+ keyword = "else"
+ test = None
+ consequence = node.else_
+
+ self._if_test(keyword, test, consequence, current_klass)
+
+
+ def _if_test(self, keyword, test, consequence, current_klass):
+ if test:
+ expr = self.expr(test, current_klass)
+
+ print >>self.output, " " + keyword + " (pyjslib.bool(" + expr + ")) {"
+ else:
+ print >>self.output, " " + keyword + " {"
+
+ if isinstance(consequence, ast.Stmt):
+ for child in consequence.nodes:
+ self._stmt(child, current_klass)
+ else:
+ raise TranslationError("unsupported type (in _if_test)", consequence)
+
+ print >>self.output, " }"
+
+
+ def _from(self, node):
+ for name in node.names:
+ # look up "hack" in AppTranslator as to how findFile gets here
+ module_name = node.modname + "." + name[0]
+ try:
+ ff = self.findFile(module_name + ".py")
+ except Exception:
+ ff = None
+ if ff:
+ self.add_imported_module(module_name)
+ else:
+ self.imported_classes[name[0]] = node.modname
+
+
+ def _compare(self, node, current_klass):
+ lhs = self.expr(node.expr, current_klass)
+
+ if len(node.ops) != 1:
+ raise TranslationError("only one ops supported (in _compare)", node)
+
+ op = node.ops[0][0]
+ rhs_node = node.ops[0][1]
+ rhs = self.expr(rhs_node, current_klass)
+
+ if op == "==":
+ return "pyjslib.eq(%s, %s)" % (lhs, rhs)
+ if op == "in":
+ return rhs + ".__contains__(" + lhs + ")"
+ elif op == "not in":
+ return "!" + rhs + ".__contains__(" + lhs + ")"
+ elif op == "is":
+ op = "==="
+ elif op == "is not":
+ op = "!=="
+
+ return "(" + lhs + " " + op + " " + rhs + ")"
+
+
+ def _not(self, node, current_klass):
+ expr = self.expr(node.expr, current_klass)
+
+ return "!(" + expr + ")"
+
+ def _or(self, node, current_klass):
+ expr = "("+(") || (".join([self.expr(child, current_klass) for child in node.nodes]))+')'
+ return expr
+
+ def _and(self, node, current_klass):
+ expr = "("+(") && (".join([self.expr(child, current_klass) for child in node.nodes]))+")"
+ return expr
+
+ def _for(self, node, current_klass):
+ assign_name = ""
+ assign_tuple = ""
+
+ # based on Bob Ippolito's Iteration in Javascript code
+ if isinstance(node.assign, ast.AssName):
+ assign_name = node.assign.name
+ self.add_local_arg(assign_name)
+ if node.assign.flags == "OP_ASSIGN":
+ op = "="
+ elif isinstance(node.assign, ast.AssTuple):
+ op = "="
+ i = 0
+ for child in node.assign:
+ child_name = child.name
+ if assign_name == "":
+ assign_name = "temp_" + child_name
+ self.add_local_arg(child_name)
+ assign_tuple += """
+ var %(child_name)s %(op)s %(assign_name)s.__getitem__(%(i)i);
+ """ % locals()
+ i += 1
+ else:
+ raise TranslationError("unsupported type (in _for)", node.assign)
+
+ if isinstance(node.list, ast.Name):
+ list_expr = self._name(node.list, current_klass)
+ elif isinstance(node.list, ast.Getattr):
+ list_expr = self._getattr(node.list, current_klass)
+ elif isinstance(node.list, ast.CallFunc):
+ list_expr = self._callfunc(node.list, current_klass)
+ else:
+ raise TranslationError("unsupported type (in _for)", node.list)
+
+ lhs = "var " + assign_name
+ iterator_name = "__" + assign_name
+
+ print >>self.output, """
+ var %(iterator_name)s = %(list_expr)s.__iter__();
+ try {
+ while (true) {
+ %(lhs)s %(op)s %(iterator_name)s.next();
+ %(assign_tuple)s
+ """ % locals()
+ for node in node.body.nodes:
+ self._stmt(node, current_klass)
+ print >>self.output, """
+ }
+ } catch (e) {
+ if (e.__name__ != pyjslib.StopIteration.__name__) {
+ throw e;
+ }
+ }
+ """ % locals()
+
+
+ def _while(self, node, current_klass):
+ test = self.expr(node.test, current_klass)
+ print >>self.output, " while (pyjslib.bool(" + test + ")) {"
+ if isinstance(node.body, ast.Stmt):
+ for child in node.body.nodes:
+ self._stmt(child, current_klass)
+ else:
+ raise TranslationError("unsupported type (in _while)", node.body)
+ print >>self.output, " }"
+
+
+ def _const(self, node):
+ if isinstance(node.value, int):
+ return str(node.value)
+ elif isinstance(node.value, float):
+ return str(node.value)
+ elif isinstance(node.value, basestring):
+ v = node.value
+ if isinstance(node.value, unicode):
+ v = v.encode('utf-8')
+ return "String('%s')" % escapejs(v)
+ elif node.value is None:
+ return "null"
+ else:
+ raise TranslationError("unsupported type (in _const)", node)
+
+ def _unaryadd(self, node, current_klass):
+ return self.expr(node.expr, current_klass)
+
+ def _unarysub(self, node, current_klass):
+ return "-" + self.expr(node.expr, current_klass)
+
+ def _add(self, node, current_klass):
+ return self.expr(node.left, current_klass) + " + " + self.expr(node.right, current_klass)
+
+ def _sub(self, node, current_klass):
+ return self.expr(node.left, current_klass) + " - " + self.expr(node.right, current_klass)
+
+ def _div(self, node, current_klass):
+ return self.expr(node.left, current_klass) + " / " + self.expr(node.right, current_klass)
+
+ def _mul(self, node, current_klass):
+ return self.expr(node.left, current_klass) + " * " + self.expr(node.right, current_klass)
+
+ def _mod(self, node, current_klass):
+ if isinstance(node.left, ast.Const) and isinstance(node.left.value, StringType):
+ self.imported_js.add("sprintf.js") # Include the sprintf functionality if it is used
+ return "sprintf("+self.expr(node.left, current_klass) + ", " + self.expr(node.right, current_klass)+")"
+ return self.expr(node.left, current_klass) + " % " + self.expr(node.right, current_klass)
+
+ def _invert(self, node, current_klass):
+ return "~" + self.expr(node.expr, current_klass)
+
+ def _bitand(self, node, current_klass):
+ return " & ".join([self.expr(child, current_klass) for child in node.nodes])
+
+ def _bitshiftleft(self, node, current_klass):
+ return self.expr(node.left, current_klass) + " << " + self.expr(node.right, current_klass)
+
+ def _bitshiftright(self, node, current_klass):
+ return self.expr(node.left, current_klass) + " >>> " + self.expr(node.right, current_klass)
+
+ def _bitxor(self,node, current_klass):
+ return " ^ ".join([self.expr(child, current_klass) for child in node.nodes])
+
+ def _bitor(self, node, current_klass):
+ return " | ".join([self.expr(child, current_klass) for child in node.nodes])
+
+ def _subscript(self, node, current_klass):
+ if node.flags == "OP_APPLY":
+ if len(node.subs) == 1:
+ return self.expr(node.expr, current_klass) + ".__getitem__(" + self.expr(node.subs[0], current_klass) + ")"
+ else:
+ raise TranslationError("must have one sub (in _subscript)", node)
+ else:
+ raise TranslationError("unsupported flag (in _subscript)", node)
+
+ def _subscript_stmt(self, node, current_klass):
+ if node.flags == "OP_DELETE":
+ print >>self.output, " " + self.expr(node.expr, current_klass) + ".__delitem__(" + self.expr(node.subs[0], current_klass) + ");"
+ else:
+ raise TranslationError("unsupported flag (in _subscript)", node)
+
+ def _list(self, node, current_klass):
+ return "new pyjslib.List([" + ", ".join([self.expr(x, current_klass) for x in node.nodes]) + "])"
+
+ def _dict(self, node, current_klass):
+ items = []
+ for x in node.items:
+ key = self.expr(x[0], current_klass)
+ value = self.expr(x[1], current_klass)
+ items.append("[" + key + ", " + value + "]")
+ return "new pyjslib.Dict([" + ", ".join(items) + "])"
+
+ def _tuple(self, node, current_klass):
+ return "new pyjslib.Tuple([" + ", ".join([self.expr(x, current_klass) for x in node.nodes]) + "])"
+
+ def _lambda(self, node, current_klass):
+ if node.varargs:
+ raise TranslationError("varargs are not supported in Lambdas", node)
+ if node.kwargs:
+ raise TranslationError("kwargs are not supported in Lambdas", node)
+ res = cStringIO.StringIO()
+ arg_names = list(node.argnames)
+ function_args = ", ".join(arg_names)
+ for child in node.getChildNodes():
+ expr = self.expr(child, None)
+ print >> res, "function (%s){" % function_args
+ self._default_args_handler(node, arg_names, None,
+ output=res)
+ print >> res, 'return %s;}' % expr
+ return res.getvalue()
+
+ def _slice(self, node, current_klass):
+ if node.flags == "OP_APPLY":
+ lower = "null"
+ upper = "null"
+ if node.lower != None:
+ lower = self.expr(node.lower, current_klass)
+ if node.upper != None:
+ upper = self.expr(node.upper, current_klass)
+ return "pyjslib.slice(" + self.expr(node.expr, current_klass) + ", " + lower + ", " + upper + ")"
+ else:
+ raise TranslationError("unsupported flag (in _slice)", node)
+
+ def _global(self, node, current_klass):
+ for name in node.names:
+ self.method_imported_globals.add(name)
+
+ def expr(self, node, current_klass):
+ if isinstance(node, ast.Const):
+ return self._const(node)
+ # @@@ not sure if the parentheses should be here or in individual operator functions - JKT
+ elif isinstance(node, ast.Mul):
+ return " ( " + self._mul(node, current_klass) + " ) "
+ elif isinstance(node, ast.Add):
+ return " ( " + self._add(node, current_klass) + " ) "
+ elif isinstance(node, ast.Sub):
+ return " ( " + self._sub(node, current_klass) + " ) "
+ elif isinstance(node, ast.Div):
+ return " ( " + self._div(node, current_klass) + " ) "
+ elif isinstance(node, ast.Mod):
+ return self._mod(node, current_klass)
+ elif isinstance(node, ast.UnaryAdd):
+ return self._unaryadd(node, current_klass)
+ elif isinstance(node, ast.UnarySub):
+ return self._unarysub(node, current_klass)
+ elif isinstance(node, ast.Not):
+ return self._not(node, current_klass)
+ elif isinstance(node, ast.Or):
+ return self._or(node, current_klass)
+ elif isinstance(node, ast.And):
+ return self._and(node, current_klass)
+ elif isinstance(node, ast.Invert):
+ return self._invert(node, current_klass)
+ elif isinstance(node, ast.Bitand):
+ return "("+self._bitand(node, current_klass)+")"
+ elif isinstance(node,ast.LeftShift):
+ return self._bitshiftleft(node, current_klass)
+ elif isinstance(node, ast.RightShift):
+ return self._bitshiftright(node, current_klass)
+ elif isinstance(node, ast.Bitxor):
+ return "("+self._bitxor(node, current_klass)+")"
+ elif isinstance(node, ast.Bitor):
+ return "("+self._bitor(node, current_klass)+")"
+ elif isinstance(node, ast.Compare):
+ return self._compare(node, current_klass)
+ elif isinstance(node, ast.CallFunc):
+ return self._callfunc(node, current_klass)
+ elif isinstance(node, ast.Name):
+ return self._name(node, current_klass)
+ elif isinstance(node, ast.Subscript):
+ return self._subscript(node, current_klass)
+ elif isinstance(node, ast.Getattr):
+ return self._getattr(node, current_klass)
+ elif isinstance(node, ast.List):
+ return self._list(node, current_klass)
+ elif isinstance(node, ast.Dict):
+ return self._dict(node, current_klass)
+ elif isinstance(node, ast.Tuple):
+ return self._tuple(node, current_klass)
+ elif isinstance(node, ast.Slice):
+ return self._slice(node, current_klass)
+ elif isinstance(node, ast.Lambda):
+ return self._lambda(node, current_klass)
+ else:
+ raise TranslationError("unsupported type (in expr)", node)
+
+
+
+import cStringIO
+
+def translate(file_name, module_name, debug=False):
+ f = file(file_name, "r")
+ src = f.read()
+ f.close()
+ output = cStringIO.StringIO()
+ mod = compiler.parseFile(file_name)
+ t = Translator(module_name, module_name, module_name, src, debug, mod, output)
+ return output.getvalue()
+
+
+class PlatformParser:
+ def __init__(self, platform_dir = "", verbose=True):
+ self.platform_dir = platform_dir
+ self.parse_cache = {}
+ self.platform = ""
+ self.verbose = verbose
+
+ def setPlatform(self, platform):
+ self.platform = platform
+
+ def parseModule(self, module_name, file_name):
+
+ importing = False
+ if not self.parse_cache.has_key(file_name):
+ importing = True
+ mod = compiler.parseFile(file_name)
+ self.parse_cache[file_name] = mod
+ else:
+ mod = self.parse_cache[file_name]
+
+ override = False
+ platform_file_name = self.generatePlatformFilename(file_name)
+ if self.platform and os.path.isfile(platform_file_name):
+ mod = copy.deepcopy(mod)
+ mod_override = compiler.parseFile(platform_file_name)
+ self.merge(mod, mod_override)
+ override = True
+
+ if self.verbose:
+ if override:
+ print "Importing %s (Platform %s)" % (module_name, self.platform)
+ elif importing:
+ print "Importing %s" % (module_name)
+
+ return mod, override
+
+ def generatePlatformFilename(self, file_name):
+ (module_name, extension) = os.path.splitext(os.path.basename(file_name))
+ platform_file_name = module_name + self.platform + extension
+
+ return os.path.join(os.path.dirname(file_name), self.platform_dir, platform_file_name)
+
+ def merge(self, tree1, tree2):
+ for child in tree2.node:
+ if isinstance(child, ast.Function):
+ self.replaceFunction(tree1, child.name, child)
+ elif isinstance(child, ast.Class):
+ self.replaceClassMethods(tree1, child.name, child)
+
+ return tree1
+
+ def replaceFunction(self, tree, function_name, function_node):
+ # find function to replace
+ for child in tree.node:
+ if isinstance(child, ast.Function) and child.name == function_name:
+ self.copyFunction(child, function_node)
+ return
+ raise TranslationError("function not found: " + function_name, function_node)
+
+ def replaceClassMethods(self, tree, class_name, class_node):
+ # find class to replace
+ old_class_node = None
+ for child in tree.node:
+ if isinstance(child, ast.Class) and child.name == class_name:
+ old_class_node = child
+ break
+
+ if not old_class_node:
+ raise TranslationError("class not found: " + class_name, class_node)
+
+ # replace methods
+ for function_node in class_node.code:
+ if isinstance(function_node, ast.Function):
+ found = False
+ for child in old_class_node.code:
+ if isinstance(child, ast.Function) and child.name == function_node.name:
+ found = True
+ self.copyFunction(child, function_node)
+ break
+
+ if not found:
+ raise TranslationError("class method not found: " + class_name + "." + function_node.name, function_node)
+
+ def copyFunction(self, target, source):
+ target.code = source.code
+ target.argnames = source.argnames
+ target.defaults = source.defaults
+ target.doc = source.doc # @@@ not sure we need to do this any more
+
+def dotreplace(fname):
+ path, ext = os.path.splitext(fname)
+ return path.replace(".", "/") + ext
+
+class AppTranslator:
+
+ def __init__(self, library_dirs=[], parser=None, dynamic=False,
+ optimize=False, verbose=True):
+ self.extension = ".py"
+ self.optimize = optimize
+ self.library_modules = []
+ self.overrides = {}
+ self.library_dirs = path + library_dirs
+ self.dynamic = dynamic
+ self.verbose = verbose
+
+ if not parser:
+ self.parser = PlatformParser()
+ else:
+ self.parser = parser
+
+ self.parser.dynamic = dynamic
+
+ def findFile(self, file_name):
+ if os.path.isfile(file_name):
+ return file_name
+
+ for library_dir in self.library_dirs:
+ file_name = dotreplace(file_name)
+ full_file_name = os.path.join(
+ os.path.abspath(os.path.dirname(__file__)), library_dir, file_name)
+ if os.path.isfile(full_file_name):
+ return full_file_name
+
+ fnameinit, ext = os.path.splitext(file_name)
+ fnameinit = fnameinit + "/__init__.py"
+
+ full_file_name = os.path.join(
+ os.path.abspath(os.path.dirname(__file__)), library_dir, fnameinit)
+ if os.path.isfile(full_file_name):
+ return full_file_name
+
+ raise Exception("file not found: " + file_name)
+
+ def _translate(self, module_name, is_app=True, debug=False,
+ imported_js=set()):
+ if module_name not in self.library_modules:
+ self.library_modules.append(module_name)
+
+ file_name = self.findFile(module_name + self.extension)
+
+ output = cStringIO.StringIO()
+
+ f = file(file_name, "r")
+ src = f.read()
+ f.close()
+
+ mod, override = self.parser.parseModule(module_name, file_name)
+ if override:
+ override_name = "%s.%s" % (self.parser.platform.lower(),
+ module_name)
+ self.overrides[override_name] = override_name
+ if is_app:
+ mn = '__main__'
+ else:
+ mn = module_name
+ t = Translator(mn, module_name, module_name,
+ src, debug, mod, output, self.dynamic, self.optimize,
+ self.findFile)
+
+ module_str = output.getvalue()
+ imported_js.update(set(t.imported_js))
+ imported_modules_str = ""
+ for module in t.imported_modules:
+ if module not in self.library_modules:
+ self.library_modules.append(module)
+ #imported_js.update(set(t.imported_js))
+ #imported_modules_str += self._translate(
+ # module, False, debug=debug, imported_js=imported_js)
+
+ return imported_modules_str + module_str
+
+
+ def translate(self, module_name, is_app=True, debug=False,
+ library_modules=[]):
+ app_code = cStringIO.StringIO()
+ lib_code = cStringIO.StringIO()
+ imported_js = set()
+ self.library_modules = []
+ self.overrides = {}
+ for library in library_modules:
+ if library.endswith(".js"):
+ imported_js.add(library)
+ continue
+ self.library_modules.append(library)
+ if self.verbose:
+ print 'Including LIB', library
+ print >> lib_code, '\n//\n// BEGIN LIB '+library+'\n//\n'
+ print >> lib_code, self._translate(
+ library, False, debug=debug, imported_js=imported_js)
+
+ print >> lib_code, "/* initialize static library */"
+ print >> lib_code, "%s%s();\n" % (UU, library)
+
+ print >> lib_code, '\n//\n// END LIB '+library+'\n//\n'
+ if module_name:
+ print >> app_code, self._translate(
+ module_name, is_app, debug=debug, imported_js=imported_js)
+ for js in imported_js:
+ path = self.findFile(js)
+ if os.path.isfile(path):
+ if self.verbose:
+ print 'Including JS', js
+ print >> lib_code, '\n//\n// BEGIN JS '+js+'\n//\n'
+ print >> lib_code, file(path).read()
+ print >> lib_code, '\n//\n// END JS '+js+'\n//\n'
+ else:
+ print >>sys.stderr, 'Warning: Unable to find imported javascript:', js
+ return lib_code.getvalue(), app_code.getvalue()
+
+usage = """
+ usage: %s file_name [module_name]
+"""
+
+def main():
+ import sys
+ if len(sys.argv)<2:
+ print >> sys.stderr, usage % sys.argv[0]
+ sys.exit(1)
+ file_name = os.path.abspath(sys.argv[1])
+ if not os.path.isfile(file_name):
+ print >> sys.stderr, "File not found %s" % file_name
+ sys.exit(1)
+ if len(sys.argv) > 2:
+ module_name = sys.argv[2]
+ else:
+ module_name = None
+ print translate(file_name, module_name),
+
+if __name__ == "__main__":
+ main()
+