| # Copyright 2016 The Chromium Authors. All rights reserved. |
| # Use of this source code is governed by a BSD-style license that can be |
| # found in the LICENSE file. |
| |
| """Generate template values for a callback function. |
| |
| Design doc: http://www.chromium.org/developers/design-documents/idl-compiler |
| """ |
| |
| from v8_globals import includes |
| import v8_types |
| |
| CALLBACK_FUNCTION_H_INCLUDES = frozenset([ |
| 'platform/bindings/callback_function_base.h', |
| ]) |
| CALLBACK_FUNCTION_CPP_INCLUDES = frozenset([ |
| 'base/stl_util.h', |
| 'bindings/core/v8/generated_code_helper.h', |
| 'bindings/core/v8/native_value_traits_impl.h', |
| 'bindings/core/v8/to_v8_for_core.h', |
| 'bindings/core/v8/v8_binding_for_core.h', |
| 'core/execution_context/execution_context.h', |
| 'platform/bindings/exception_messages.h', |
| 'platform/bindings/exception_state.h', |
| ]) |
| |
| |
| def callback_function_context(callback_function): |
| includes.clear() |
| includes.update(CALLBACK_FUNCTION_CPP_INCLUDES) |
| idl_type = callback_function.idl_type |
| idl_type_str = str(idl_type) |
| |
| for argument in callback_function.arguments: |
| argument.idl_type.add_includes_for_type( |
| callback_function.extended_attributes) |
| |
| context = { |
| # While both |callback_function_name| and |cpp_class| are identical at |
| # the moment, the two are being defined because their values may change |
| # in the future (e.g. if we support [ImplementedAs=] in callback |
| # functions). |
| 'callback_function_name': callback_function.name, |
| 'cpp_class': 'V8%s' % callback_function.name, |
| 'cpp_includes': sorted(includes), |
| 'forward_declarations': sorted(forward_declarations(callback_function)), |
| 'header_includes': sorted(CALLBACK_FUNCTION_H_INCLUDES), |
| 'idl_type': idl_type_str, |
| 'is_treat_non_object_as_null': 'TreatNonObjectAsNull' in callback_function.extended_attributes, |
| 'native_value_traits_tag': v8_types.idl_type_to_native_value_traits_tag(idl_type), |
| 'return_cpp_type': idl_type.cpp_type, |
| } |
| |
| context.update(arguments_context(callback_function.arguments)) |
| return context |
| |
| |
| def forward_declarations(callback_function): |
| def find_forward_declaration(idl_type): |
| if idl_type.is_interface_type or idl_type.is_dictionary: |
| return idl_type.implemented_as |
| elif idl_type.is_array_or_sequence_type: |
| return find_forward_declaration(idl_type.element_type) |
| return None |
| |
| declarations = set(['ScriptWrappable']) |
| for argument in callback_function.arguments: |
| name = find_forward_declaration(argument.idl_type) |
| if name: |
| declarations.add(name) |
| return declarations |
| |
| |
| def arguments_context(arguments): |
| def argument_context(argument): |
| idl_type = argument.idl_type |
| return { |
| 'cpp_value_to_v8_value': idl_type.cpp_value_to_v8_value( |
| argument.name, isolate='GetIsolate()', |
| creation_context='argument_creation_context'), |
| 'enum_type': idl_type.enum_type, |
| 'enum_values': idl_type.enum_values, |
| 'is_variadic': argument.is_variadic, |
| 'name': argument.name, |
| 'v8_name': 'v8_%s' % argument.name, |
| } |
| |
| def argument_cpp_type(argument): |
| cpp_type = argument.idl_type.callback_cpp_type |
| if argument.is_variadic: |
| return 'const Vector<%s>&' % cpp_type |
| else: |
| return cpp_type |
| |
| argument_declarations = ['ScriptWrappable* callback_this_value'] |
| argument_declarations.extend( |
| '%s %s' % (argument_cpp_type(argument), argument.name) |
| for argument in arguments) |
| return { |
| 'argument_declarations': argument_declarations, |
| 'arguments': [argument_context(argument) for argument in arguments], |
| } |
