Mojo C++ bindings: provide data view for all object types.

mojo/public/tools/bindings/generators/mojom_cpp_generator.py

 # Copyright 2013 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.
 
 """Generates C++ source files from a mojom.Module."""
 
 import mojom.generate.generator as generator
 import mojom.generate.module as mojom
 import mojom.generate.pack as pack
 from mojom.generate.template_expander import UseJinja
@@ skipping 224 matching lines @@
 
 def ShouldPassParamByValue(kind):
   return ((not mojom.IsReferenceKind(kind)) or IsMoveOnlyKind(kind) or
       IsCopyablePassByValue(kind))
 
 def GetCppWrapperParamType(kind):
   cpp_wrapper_type = GetCppWrapperType(kind)
   return (cpp_wrapper_type if ShouldPassParamByValue(kind)
                            else "const %s&" % cpp_wrapper_type)
 
+def GetCppDataViewType(kind):
+  if mojom.IsEnumKind(kind):
+    return GetNameForKind(kind)
+  if mojom.IsStructKind(kind) or mojom.IsUnionKind(kind):
+    return "%sDataView" % GetNameForKind(kind)
+  if mojom.IsArrayKind(kind):
+    return "mojo::ArrayDataView<%s>" % GetCppDataViewType(kind.kind)
+  if mojom.IsMapKind(kind):
+    return ("mojo::MapDataView<%s, %s>" % (GetCppDataViewType(kind.key_kind),
+                                           GetCppDataViewType(kind.value_kind)))
+  if mojom.IsStringKind(kind):
+    return "mojo::StringDataView"
+  return GetCppWrapperType(kind)
+
 def GetCppFieldType(kind):
   if mojom.IsStructKind(kind):
     return ("mojo::internal::Pointer<%s>" %
         GetNameForKind(kind, internal=True))
   if mojom.IsUnionKind(kind):
     return "%s" % GetNameForKind(kind, internal=True)
   if mojom.IsArrayKind(kind):
     return ("mojo::internal::Pointer<mojo::internal::Array_Data<%s>>" %
             GetCppFieldType(kind.kind))
   if mojom.IsMapKind(kind):
@@ skipping 150 matching lines @@
     return "nullptr"
 
   return "new mojo::internal::ContainerValidateParams(%s)" % (
       GetContainerValidateParamsCtorArgs(kind))
 
 class Generator(generator.Generator):
 
   cpp_filters = {
     "constant_value": ConstantValue,
     "cpp_wrapper_param_type": GetCppWrapperParamType,
+    "cpp_data_view_type": GetCppDataViewType,
     "cpp_field_type": GetCppFieldType,
     "cpp_union_field_type": GetCppUnionFieldType,
     "cpp_pod_type": GetCppPodType,
     "cpp_union_getter_return_type": GetUnionGetterReturnType,
     "cpp_wrapper_type": GetCppWrapperType,
     "default_value": DefaultValue,
     "expression_to_text": ExpressionToText,
     "get_container_validate_params_ctor_args":
     GetContainerValidateParamsCtorArgs,
     "get_name_for_kind": GetNameForKind,
@@ skipping 82 matching lines @@
     _use_new_wrapper_types = self.use_new_wrapper_types
     global _variant
     _variant = self.variant
     suffix = "-%s" % self.variant if self.variant else ""
     self.Write(self.GenerateModuleHeader(),
         self.MatchMojomFilePath("%s%s.h" % (self.module.name, suffix)))
     self.Write(self.GenerateModuleInternalHeader(),
         self.MatchMojomFilePath("%s%s-internal.h" % (self.module.name, suffix)))
     self.Write(self.GenerateModuleSource(),
         self.MatchMojomFilePath("%s%s.cc" % (self.module.name, suffix)))