IDL: Binding code generation for dictionaries

Source/bindings/scripts/v8_dictionary.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.
+
+"""Generate template contexts of dictionaries for both v8 bindings and
+implementation classes that are used by blink's core/modules.
+"""
+
+import copy
+import operator
+from v8_globals import includes
+import v8_types
+import v8_utilities
+
+
+DICTIONARY_H_INCLUDES = frozenset([
+    'bindings/core/v8/V8Binding.h',
+    'platform/heap/Handle.h',
+])
+
+DICTIONARY_CPP_INCLUDES = frozenset([
+    # FIXME: Remove this, http://crbug.com/321462
+    'bindings/core/v8/Dictionary.h',
+])
+
+
+def setter_name_for_dictionary_member(member):
+    return 'set%s' % v8_utilities.capitalize(member.name)
+
+
+def has_name_for_dictionary_member(member):
+    return 'has%s' % v8_utilities.capitalize(member.name)
+
+
+# Context for V8 bindings
+
+def dictionary_context(dictionary):
+    includes.clear()
+    includes.update(DICTIONARY_CPP_INCLUDES)
+    return {
+        'cpp_class': v8_utilities.cpp_name(dictionary),
+        'header_includes': set(DICTIONARY_H_INCLUDES),
+        'members': [member_context(member)
+                    for member in sorted(dictionary.members,
+                                         key=operator.attrgetter('name'))],
+        'v8_class': v8_utilities.v8_class_name(dictionary),
+    }
+
+
+def member_context(member):
+    idl_type = member.idl_type
+    idl_type.add_includes_for_type()
+
+    def idl_type_for_default_value():
+        copied_type = copy.copy(idl_type)
+        # IdlType for default values shouldn't be nullable. Otherwise,
+        # it will generate meaningless expression like
+        # 'String("default value").isNull() ? ...'.
+        copied_type.is_nullable = False
+        return copied_type
+
+    def default_values():
+        if not member.default_value:
+            return None, None
+        if member.default_value.is_null:
+            return None, 'v8::Null(isolate)'
+        cpp_default_value = str(member.default_value)
+        v8_default_value = idl_type_for_default_value().cpp_value_to_v8_value(
+            cpp_value=cpp_default_value, isolate='isolate',
+            creation_context='creationContext')
+        return cpp_default_value, v8_default_value
+
+    cpp_default_value, v8_default_value = default_values()
+
+    return {
+        'cpp_default_value': cpp_default_value,
+        'cpp_type': idl_type.cpp_type,
+        'cpp_value_to_v8_value': idl_type.cpp_value_to_v8_value(
+            cpp_value='impl->%s()' % member.name, isolate='isolate',
+            creation_context='creationContext',
+            extended_attributes=member.extended_attributes),
+        'has_name': has_name_for_dictionary_member(member),
+        'name': member.name,
+        'setter_name': setter_name_for_dictionary_member(member),
+        'v8_default_value': v8_default_value,
+        'v8_type': v8_types.v8_type(idl_type.base_type),
+    }
+
+# FIXME: Implement context for impl class.