IDL: ArrayBuffer and ArrayBufferView support for union types

Source/bindings/scripts/v8_union.py

 # Copyright 2014 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.
 
 import v8_utilities
 
 
 UNION_H_INCLUDES = frozenset([
     'bindings/core/v8/ExceptionState.h',
     'bindings/core/v8/V8Binding.h',
@@ skipping 12 matching lines @@
         'header_forward_decls': sorted(header_forward_decls),
         'header_includes': sorted(UNION_H_INCLUDES),
     }
 
 
 def container_context(union_type, interfaces_info):
     members = []
 
     # These variables refer to member contexts if the given union type has
     # corresponding types. They are used for V8 -> impl conversion.
+    array_buffer_type = None
+    array_buffer_view_type = None
     boolean_type = None
     dictionary_type = None
     interface_types = []
     numeric_type = None
     string_type = None
     for member in union_type.member_types:
         context = member_context(member, interfaces_info)
         members.append(context)
-        if member.is_interface_type:
+        if member.base_type == 'ArrayBuffer':
+            if array_buffer_type:
+                raise Exception('%s is ambiguous.' % union_type.name)
+            array_buffer_type = context
+        elif member.base_type == 'ArrayBufferView':
+            if array_buffer_view_type:
+                raise Exception('%s is ambiguous.' % union_type.name)
+            array_buffer_view_type = context
+        elif member.is_interface_type:
             interface_types.append(context)
         elif member.is_dictionary:
             if dictionary_type:
                 raise Exception('%s is ambiguous.' % union_type.name)
             dictionary_type = context
         elif member.base_type == 'boolean':
             if boolean_type:
                 raise Exception('%s is ambiguous.' % union_type.name)
             boolean_type = context
         elif member.is_numeric_type:
             if numeric_type:
                 raise Exception('%s is ambiguous.' % union_type.name)
             numeric_type = context
         elif member.is_string_type:
             if string_type:
                 raise Exception('%s is ambiguous.' % union_type.name)
             string_type = context
         else:
             raise Exception('%s is not supported as an union member.' % member.name)
 
     return {
+        'array_buffer_type': array_buffer_type,
+        'array_buffer_view_type': array_buffer_view_type,
         'boolean_type': boolean_type,
         'cpp_class': union_type.name,
         'dictionary_type': dictionary_type,
         'interface_types': interface_types,
         'members': members,
         'needs_trace': any(member['is_traceable'] for member in members),
         'numeric_type': numeric_type,
         'string_type': string_type,
     }
 
 
 def member_context(member, interfaces_info):
     cpp_includes.update(member.includes_for_type)
     interface_info = interfaces_info.get(member.name, None)
     if interface_info:
         cpp_includes.update(interface_info.get('dependencies_include_paths', []))
-        header_forward_decls.add(member.name)
+        header_forward_decls.add(member.implemented_as)
     return {
         'cpp_name': v8_utilities.uncapitalize(member.name),
         'cpp_type': member.cpp_type_args(used_in_cpp_sequence=True),
         'cpp_local_type': member.cpp_type,
         'cpp_value_to_v8_value': member.cpp_value_to_v8_value(
             cpp_value='impl.getAs%s()' % member.name, isolate='isolate',
             creation_context='creationContext'),
         'is_traceable': (member.is_garbage_collected or
                          member.is_will_be_garbage_collected),
         'rvalue_cpp_type': member.cpp_type_args(used_as_rvalue_type=True),
         'specific_type_enum': 'SpecificType' + member.name,
         'type_name': member.name,
         'v8_value_to_local_cpp_value': member.v8_value_to_local_cpp_value(
             {}, 'v8Value', 'cppValue', needs_exception_state_for_string=True),
     }