| # Copyright (C) 2013 Google Inc. All rights reserved. |
| # |
| # Redistribution and use in source and binary forms, with or without |
| # modification, are permitted provided that the following conditions are |
| # met: |
| # |
| # * Redistributions of source code must retain the above copyright |
| # notice, this list of conditions and the following disclaimer. |
| # * Redistributions in binary form must reproduce the above |
| # copyright notice, this list of conditions and the following disclaimer |
| # in the documentation and/or other materials provided with the |
| # distribution. |
| # * Neither the name of Google Inc. nor the names of its |
| # contributors may be used to endorse or promote products derived from |
| # this software without specific prior written permission. |
| # |
| # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| # A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| # OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| """Generate template values for methods. |
| |
| Extends IdlArgument with property |default_cpp_value|. |
| Extends IdlTypeBase and IdlUnionType with property |union_arguments|. |
| |
| Design doc: http://www.chromium.org/developers/design-documents/idl-compiler |
| """ |
| |
| from idl_definitions import IdlArgument |
| from idl_types import IdlTypeBase, IdlUnionType, inherits_interface |
| from v8_globals import includes |
| import v8_types |
| import v8_utilities |
| from v8_utilities import has_extended_attribute_value |
| |
| |
| # Methods with any of these require custom method registration code in the |
| # interface's configure*Template() function. |
| CUSTOM_REGISTRATION_EXTENDED_ATTRIBUTES = frozenset([ |
| 'NotEnumerable', |
| ]) |
| |
| |
| def argument_needs_try_catch(method, argument): |
| return_promise = method.idl_type and method.idl_type.name == 'Promise' |
| idl_type = argument.idl_type |
| base_type = idl_type.base_type |
| |
| return not( |
| # These cases are handled by separate code paths in the |
| # generate_argument() macro in engine/bindings/templates/methods.cpp. |
| idl_type.is_callback_interface or |
| base_type == 'SerializedScriptValue' or |
| (argument.is_variadic and idl_type.is_wrapper_type) or |
| # String and enumeration arguments converted using one of the |
| # TOSTRING_* macros except for _PROMISE variants in |
| # engine/bindings/core/v8/V8BindingMacros.h don't use a v8::TryCatch. |
| ((base_type == 'DOMString' or idl_type.is_enum) and |
| not argument.is_variadic and |
| not return_promise)) |
| |
| |
| def use_local_result(method): |
| extended_attributes = method.extended_attributes |
| idl_type = method.idl_type |
| return (has_extended_attribute_value(method, 'CallWith', 'ScriptState') or |
| 'RaisesException' in extended_attributes or |
| idl_type.is_union_type or |
| idl_type.is_explicit_nullable) |
| |
| |
| def method_context(interface, method): |
| arguments = method.arguments |
| extended_attributes = method.extended_attributes |
| idl_type = method.idl_type |
| is_static = method.is_static |
| name = method.name |
| |
| idl_type.add_includes_for_type() |
| this_cpp_value = cpp_value(interface, method, len(arguments)) |
| |
| def function_template(): |
| if is_static: |
| return 'functionTemplate' |
| return 'prototypeTemplate' |
| |
| is_call_with_script_arguments = has_extended_attribute_value(method, 'CallWith', 'ScriptArguments') |
| if is_call_with_script_arguments: |
| includes.update(['bindings/core/v8/ScriptCallStackFactory.h', |
| 'core/inspector/ScriptArguments.h']) |
| is_call_with_script_state = has_extended_attribute_value(method, 'CallWith', 'ScriptState') |
| if is_call_with_script_state: |
| includes.add('bindings/core/v8/ScriptState.h') |
| |
| is_raises_exception = 'RaisesException' in extended_attributes |
| |
| arguments_need_try_catch = ( |
| any(argument_needs_try_catch(method, argument) |
| for argument in arguments)) |
| |
| return { |
| 'arguments': [argument_context(interface, method, argument, index) |
| for index, argument in enumerate(arguments)], |
| 'arguments_need_try_catch': arguments_need_try_catch, |
| 'cpp_type': (v8_types.cpp_template_type('Nullable', idl_type.cpp_type) |
| if idl_type.is_explicit_nullable else idl_type.cpp_type), |
| 'cpp_value': this_cpp_value, |
| 'cpp_type_initializer': idl_type.cpp_type_initializer, |
| 'custom_registration_extended_attributes': |
| CUSTOM_REGISTRATION_EXTENDED_ATTRIBUTES.intersection( |
| extended_attributes.iterkeys()), |
| 'exposed_test': v8_utilities.exposed(method, interface), # [Exposed] |
| 'function_template': function_template(), |
| 'has_custom_registration': is_static or |
| v8_utilities.has_extended_attribute( |
| method, CUSTOM_REGISTRATION_EXTENDED_ATTRIBUTES), |
| 'has_exception_state': |
| is_raises_exception or |
| any(argument for argument in arguments |
| if argument.idl_type.name == 'SerializedScriptValue' or |
| argument.idl_type.may_raise_exception_on_conversion), |
| 'idl_type': idl_type.base_type, |
| 'is_call_with_execution_context': has_extended_attribute_value(method, 'CallWith', 'ExecutionContext'), |
| 'is_call_with_script_arguments': is_call_with_script_arguments, |
| 'is_call_with_script_state': is_call_with_script_state, |
| 'is_custom': 'Custom' in extended_attributes, |
| 'is_explicit_nullable': idl_type.is_explicit_nullable, |
| 'is_partial_interface_member': |
| 'PartialInterfaceImplementedAs' in extended_attributes, |
| 'is_raises_exception': is_raises_exception, |
| 'is_static': is_static, |
| 'is_variadic': arguments and arguments[-1].is_variadic, |
| 'name': name, |
| 'number_of_arguments': len(arguments), |
| 'number_of_required_arguments': len([ |
| argument for argument in arguments |
| if not (argument.is_optional or argument.is_variadic)]), |
| 'number_of_required_or_variadic_arguments': len([ |
| argument for argument in arguments |
| if not argument.is_optional]), |
| 'union_arguments': idl_type.union_arguments, |
| 'use_local_result': use_local_result(method), |
| } |
| |
| |
| def argument_context(interface, method, argument, index): |
| extended_attributes = argument.extended_attributes |
| idl_type = argument.idl_type |
| this_cpp_value = cpp_value(interface, method, index) |
| return_promise = (method.idl_type.name == 'Promise' if method.idl_type |
| else False) |
| |
| default_cpp_value = argument.default_cpp_value |
| return { |
| 'cpp_type': idl_type.cpp_type_args(extended_attributes=extended_attributes, |
| raw_type=True, |
| used_as_variadic_argument=argument.is_variadic), |
| 'cpp_value': this_cpp_value, |
| # FIXME: check that the default value's type is compatible with the argument's |
| 'default_value': default_cpp_value, |
| 'enum_validation_expression': idl_type.enum_validation_expression, |
| 'handle': '%sHandle' % argument.name, |
| # FIXME: remove once [Default] removed and just use argument.default_value |
| 'has_default': 'Default' in extended_attributes or default_cpp_value, |
| 'has_type_checking_interface': |
| (has_extended_attribute_value(interface, 'TypeChecking', 'Interface') or |
| has_extended_attribute_value(method, 'TypeChecking', 'Interface')) and |
| idl_type.is_wrapper_type, |
| 'has_type_checking_unrestricted': |
| (has_extended_attribute_value(interface, 'TypeChecking', 'Unrestricted') or |
| has_extended_attribute_value(method, 'TypeChecking', 'Unrestricted')) and |
| idl_type.name in ('Float', 'Double'), |
| 'idl_type': idl_type.base_type, |
| 'idl_type_object': idl_type, |
| 'index': index, |
| 'is_callback_interface': idl_type.is_callback_interface, |
| 'is_nullable': idl_type.is_nullable, |
| 'is_optional': argument.is_optional, |
| 'is_wrapper_type': idl_type.is_wrapper_type, |
| 'name': argument.name, |
| } |
| |
| |
| ################################################################################ |
| # Value handling |
| ################################################################################ |
| |
| def cpp_value(interface, method, number_of_arguments): |
| def cpp_argument(argument): |
| idl_type = argument.idl_type |
| if (idl_type.is_callback_interface or |
| idl_type.name in ['NodeFilter', 'NodeFilterOrNull']): |
| # FIXME: remove this special case |
| return '%s.release()' % argument.name |
| return argument.name |
| |
| # Truncate omitted optional arguments |
| arguments = method.arguments[:number_of_arguments] |
| cpp_arguments = [] |
| |
| if method.is_constructor: |
| call_with_values = interface.extended_attributes.get('ConstructorCallWith') |
| else: |
| call_with_values = method.extended_attributes.get('CallWith') |
| cpp_arguments.extend(v8_utilities.call_with_arguments(call_with_values)) |
| |
| # Members of IDL partial interface definitions are implemented in C++ as |
| # static member functions, which for instance members (non-static members) |
| # take *impl as their first argument |
| if ('PartialInterfaceImplementedAs' in method.extended_attributes and |
| not method.is_static): |
| cpp_arguments.append('*impl') |
| cpp_arguments.extend(cpp_argument(argument) for argument in arguments) |
| |
| this_union_arguments = method.idl_type and method.idl_type.union_arguments |
| if this_union_arguments: |
| cpp_arguments.extend([member_argument['cpp_value'] |
| for member_argument in this_union_arguments]) |
| |
| if ('RaisesException' in method.extended_attributes or |
| (method.is_constructor and |
| has_extended_attribute_value(interface, 'RaisesException', 'Constructor'))): |
| cpp_arguments.append('exceptionState') |
| |
| if method.name == 'Constructor': |
| base_name = 'create' |
| elif method.name == 'NamedConstructor': |
| base_name = 'createForJSConstructor' |
| else: |
| base_name = v8_utilities.cpp_name(method) |
| |
| cpp_method_name = v8_utilities.scoped_name(interface, method, base_name) |
| return '%s(%s)' % (cpp_method_name, ', '.join(cpp_arguments)) |
| |
| |
| def v8_value_to_local_cpp_variadic_value(argument, index, return_promise): |
| assert argument.is_variadic |
| idl_type = argument.idl_type |
| |
| suffix = '' |
| |
| macro = 'TONATIVE_VOID' |
| macro_args = [ |
| argument.name, |
| 'toNativeArguments<%s>(info, %s)' % (idl_type.cpp_type, index), |
| ] |
| |
| if return_promise: |
| suffix += '_PROMISE' |
| macro_args.append('info') |
| |
| suffix += '_INTERNAL' |
| |
| return '%s%s(%s)' % (macro, suffix, ', '.join(macro_args)) |
| |
| |
| def v8_value_to_local_cpp_value(argument, index, return_promise=False): |
| extended_attributes = argument.extended_attributes |
| idl_type = argument.idl_type |
| name = argument.name |
| if argument.is_variadic: |
| return v8_value_to_local_cpp_variadic_value(argument, index, return_promise) |
| return idl_type.v8_value_to_local_cpp_value(extended_attributes, 'info[%s]' % index, |
| name, index=index, declare_variable=False, return_promise=return_promise) |
| |
| |
| ################################################################################ |
| # Auxiliary functions |
| ################################################################################ |
| |
| def union_member_argument_context(idl_type, index): |
| """Returns a context of union member for argument.""" |
| this_cpp_value = 'result%d' % index |
| this_cpp_type = idl_type.cpp_type |
| this_cpp_type_initializer = idl_type.cpp_type_initializer |
| cpp_return_value = this_cpp_value |
| |
| if not idl_type.cpp_type_has_null_value: |
| this_cpp_type = v8_types.cpp_template_type('Nullable', this_cpp_type) |
| this_cpp_type_initializer = '' |
| cpp_return_value = '%s.get()' % this_cpp_value |
| |
| if idl_type.is_string_type: |
| null_check_value = '!%s.isNull()' % this_cpp_value |
| else: |
| null_check_value = this_cpp_value |
| |
| return { |
| 'cpp_type': this_cpp_type, |
| 'cpp_type_initializer': this_cpp_type_initializer, |
| 'cpp_value': this_cpp_value, |
| 'null_check_value': null_check_value, |
| } |
| |
| |
| def union_arguments(idl_type): |
| return [union_member_argument_context(member_idl_type, index) |
| for index, member_idl_type |
| in enumerate(idl_type.member_types)] |
| |
| |
| def argument_default_cpp_value(argument): |
| if not argument.default_value: |
| return None |
| return argument.idl_type.literal_cpp_value(argument.default_value) |
| |
| IdlTypeBase.union_arguments = None |
| IdlUnionType.union_arguments = property(union_arguments) |
| IdlArgument.default_cpp_value = property(argument_default_cpp_value) |
