blob: 8faa94565fff494381a65b60a05dc7a73ca4058c [file] [log] [blame]
# Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
# for details. All rights reserved. Use of this source code is governed by a
# BSD-style license that can be found in the LICENSE file.
"""This module generates Dart APIs from the IDL database."""
import emitter
import idlnode
import logging
import os
import re
import shutil
from generator import *
from idlnode import IDLType, IDLInterface, resolveTypedef
_logger = logging.getLogger('dartgenerator')
def MergeNodes(node, other):
for attribute in other.attributes:
if not node.has_attribute(attribute):
class DartGenerator(object):
"""Utilities to generate Dart APIs and corresponding JavaScript."""
def __init__(self, logging_level=logging.WARNING):
self._auxiliary_files = {}
self._dart_templates_re = re.compile(r'[\w.:]+<([\w \.<>:]+)>')
def _StripModules(self, type_name):
return type_name.split('::')[-1]
def _IsCompoundType(self, database, type_name):
if IsRegisteredType(type_name):
return True
# References a typedef - normally a union type.
if database.HasTypeDef(type_name):
return True
if type_name.endswith('?'):
return self._IsCompoundType(database, type_name[:-len('?')])
if type_name.endswith('[]'):
return self._IsCompoundType(database, type_name[:-len('[]')])
stripped_type_name = self._StripModules(type_name)
if (database.HasInterface(stripped_type_name) or
return True
if database.HasEnum(stripped_type_name):
return True
dart_template_match = self._dart_templates_re.match(type_name)
if dart_template_match:
# Dart templates
parent_type_name = type_name[0 : dart_template_match.start(1) - 1]
sub_type_name =
return (self._IsCompoundType(database, parent_type_name) and
self._IsCompoundType(database, sub_type_name))
return False
def _IsDartType(self, type_name):
return '.' in type_name
def LoadAuxiliary(self, auxiliary_dir):
def Visitor(_, dirname, names):
for name in names:
if name.endswith('.dart'):
name = name[0:-5] # strip off ".dart"
self._auxiliary_files[name] = os.path.join(dirname, name)
os.path.walk(auxiliary_dir, Visitor, None)
def FilterMembersWithUnidentifiedTypes(self, database):
"""Removes unidentified types.
Removes constants, attributes, operations and parents with unidentified
for interface in database.GetInterfaces():
def IsIdentified(idl_node):
node_name = if else 'parent'
for idl_type in idl_node.all(idlnode.IDLType):
type_name =
if (type_name is not None and
self._IsCompoundType(database, type_name)):
# Ignore constructor warnings.
if not ( in ['Window', 'WorkerContext',
'WorkerGlobalScope'] and
_logger.warn('removing %s in %s which has unidentified type %s' %
(node_name,, type_name))
return False
return True
interface.constants = filter(IsIdentified, interface.constants)
interface.attributes = filter(IsIdentified, interface.attributes)
interface.operations = filter(IsIdentified, interface.operations)
interface.parents = filter(IsIdentified, interface.parents)
def FilterInterfaces(self, database,
"""Filters a database to remove interfaces and members that are missing
The FremontCut IDLs use annotations to specify implementation
status in various platforms. For example, if a member is annotated
with @WebKit, this means that the member is supported by WebKit.
database -- the database to filter
all_annotations -- a list of annotation names a member has to
have or it will be filtered.
or_annotations -- if a member has one of these annotations, it
won't be filtered even if it is missing some of the
exclude_displaced -- if a member has this annotation and it
is marked as displaced it will always be filtered.
exclude_suppressed -- if a member has this annotation and it
is marked as suppressed it will always be filtered.
# Filter interfaces and members whose annotations don't match.
for interface in database.GetInterfaces():
def HasAnnotations(idl_node):
"""Utility for determining if an IDLNode has all
the required annotations"""
for a in exclude_displaced:
if (a in idl_node.annotations
and 'via' in idl_node.annotations[a]):
return False
for a in exclude_suppressed:
if (a in idl_node.annotations
and 'suppressed' in idl_node.annotations[a]):
return False
for a in or_annotations:
if a in idl_node.annotations:
return True
if and_annotations == []:
return False
for a in and_annotations:
if a not in idl_node.annotations:
return False
return True
if HasAnnotations(interface):
interface.constants = filter(HasAnnotations, interface.constants)
interface.attributes = filter(HasAnnotations, interface.attributes)
interface.operations = filter(HasAnnotations, interface.operations)
interface.parents = filter(HasAnnotations, interface.parents)
def Generate(self, database, super_database, generate_interface):
self._database = database
# Collect interfaces
interfaces = []
for interface in database.GetInterfaces():
if not MatchSourceFilter(interface):
# Skip this interface since it's not present in the required source'Omitting interface - %s' %
# All web_gl constants from WebGLRenderingContextBase, WebGL2RenderingContextBase, WebGLDrawBuffers are generated
# in a synthesized class WebGL. Those IDLConstants are in web_gl_constants.
web_gl_constants = []
# Render all interfaces into Dart and save them in files.
for interface in self._PreOrderInterfaces(interfaces):
interface_name =
auxiliary_file = self._auxiliary_files.get(interface_name)
if auxiliary_file is not None:'Skipping %s because %s exists' % (
interface_name, auxiliary_file))
continue'Generating %s' %
generate_interface(interface, gl_constants = web_gl_constants)
# Generate the WEB_GL constants
web_gl_constants_interface = IDLInterface(None, "WebGL")
web_gl_constants_interface.constants = web_gl_constants
self._database._all_interfaces['WebGL'] = web_gl_constants_interface
def _PreOrderInterfaces(self, interfaces):
"""Returns the interfaces in pre-order, i.e. parents first."""
seen = set()
ordered = []
def visit(interface):
if in seen:
for parent in interface.parents:
if IsDartCollectionType(
if self._database.HasInterface(
parent_interface = self._database.GetInterface(
for interface in interfaces:
return ordered
def IsEventTarget(self, database, interface):
if == 'EventTarget':
return True
for parent in interface.parents:
parent_name =
if database.HasInterface(parent_name):
parent_interface = database.GetInterface(
if self.IsEventTarget(database, parent_interface):
return True
return False
def FixEventTargets(self, database):
for interface in database.GetInterfaces():
if self.IsEventTarget(database, interface):
# Add as an attribute for easy querying in generation code.
interface.ext_attrs['EventTarget'] = None
elif 'EventTarget' in interface.ext_attrs:
# Create fake EventTarget parent interface for interfaces that have
# 'EventTarget' extended attribute.
ast = [('Annotation', [('Id', 'WebKit')]),
('InterfaceType', ('ScopedName', 'EventTarget'))]
def AddMissingArguments(self, database):
ARG = idlnode.IDLArgument([('Type', ('ScopedName', 'object')), ('Id', 'arg')])
for interface in database.GetInterfaces():
for operation in interface.operations:
call_with = operation.ext_attrs.get('CallWith', [])
if not(isinstance(call_with, list)):
call_with = [call_with]
constructor_with = operation.ext_attrs.get('ConstructorCallWith', [])
if not(isinstance(constructor_with, list)):
constructor_with = [constructor_with]
call_with = call_with + constructor_with
if 'ScriptArguments' in call_with:
def CleanupOperationArguments(self, database):
for interface in database.GetInterfaces():
for operation in interface.operations:
# TODO(terry): Hack to remove 3rd arguments in setInterval/setTimeout.
if (( == 'setInterval' or == 'setTimeout') and \
operation.arguments[0] == 'any'):
# Massage any operation argument type that is IDLEnum to String.
for index, argument in enumerate(operation.arguments):
type_name =
if database.HasEnum(type_name):
operation.arguments[index].type = IDLType('DOMString')