Mojo C++ bindings: share DataView class between chromium and blink variants.

mojo/public/tools/bindings/generators/cpp_templates/module-shared.h.tmpl

 // 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.
 
 {%- set header_guard = "%s_SHARED_H_"|format(
         module.path|upper|replace("/","_")|replace(".","_")|
             replace("-", "_")) %}
 
+{%- macro mojom_type_traits(kind) %}
+template <>
+struct MojomTypeTraits<{{kind|get_qualified_name_for_kind}}DataView> {
+  using Data = {{kind|get_qualified_name_for_kind(internal=True)}};
+{%-  if kind|is_union_kind %}
+  using DataAsArrayElement = Data;
+  static const MojomTypeCategory category = MojomTypeCategory::UNION;
+{%-  else %}
+  using DataAsArrayElement = Pointer<Data>;
+  static const MojomTypeCategory category = MojomTypeCategory::STRUCT;
+{%-  endif %}
+};
+{%- endmacro %}
+
+{%- macro namespace_begin() %}
+{%-   for namespace in namespaces_as_array %}
+namespace {{namespace}} {
+{%-   endfor %}
+{%- endmacro %}
+
+{%- macro namespace_end() %}
+{%-   for namespace in namespaces_as_array|reverse %}
+}  // namespace {{namespace}}
+{%-   endfor %}
+{%- endmacro %}
+
 #ifndef {{header_guard}}
 #define {{header_guard}}
 
 #include <stdint.h>
 
 #include <functional>
 #include <ostream>
 #include <type_traits>
 #include <utility>
 
+#include "mojo/public/cpp/bindings/array_data_view.h"
 #include "mojo/public/cpp/bindings/enum_traits.h"
-#include "mojo/public/cpp/bindings/lib/serialization_forward.h"
+#include "mojo/public/cpp/bindings/interface_data_view.h"
+#include "mojo/public/cpp/bindings/lib/bindings_internal.h"
+#include "mojo/public/cpp/bindings/lib/serialization.h"
+#include "mojo/public/cpp/bindings/map_data_view.h"
 #include "mojo/public/cpp/bindings/native_enum.h"
+#include "mojo/public/cpp/bindings/native_struct_data_view.h"
+#include "mojo/public/cpp/bindings/string_data_view.h"
 #include "{{module.path}}-shared-internal.h"
 {%- for import in imports %}
 #include "{{import.module.path}}-shared.h"
 {%- endfor %}
 
-{%-   for namespace in namespaces_as_array %}
-namespace {{namespace}} {
-{%-   endfor %}
+{{namespace_begin()}}
+
+{#--- Struct Forward Declarations -#}
+{%- for struct in structs %}
+{%-   if struct|is_native_only_kind %}
+using {{struct.name}}DataView = mojo::NativeStructDataView;
+{%-   else %}
+class {{struct.name}}DataView;
+{%-   endif %}
+{%  endfor %}
+
+{#--- Union Forward Declarations -#}
+{%- for union in unions %}
+class {{union.name}}DataView;
+{%- endfor %}
+
+{{namespace_end()}}
+
+namespace mojo {
+namespace internal {
+
+{%- for struct in structs %}
+{%-   if not struct|is_native_only_kind %}
+{{mojom_type_traits(struct)}}
+{%-   endif %}
+{%- endfor %}
+
+{%- for union in unions %}
+{{mojom_type_traits(union)}}
+{%- endfor %}
+
+}  // namespace internal
+}  // namespace mojo
+
+{{namespace_begin()}}
 
 {#--- Enums #}
 {%- from "enum_macros.tmpl" import enum_decl%}
 {%- for enum in all_enums %}
 {%-   if enum|is_native_only_kind %}
 using {{enum.name}} = mojo::NativeEnum;
 {%-   else %}
 {{enum_decl(enum)}}
 {%-   endif %}
 {%- endfor %}
 
-{%-   for namespace in namespaces_as_array|reverse %}
-}  // namespace {{namespace}}
+{#--- Interfaces #}
+{%- if interfaces %}
+// Interface base classes. They are used for type safety check.
+{%- endif %}
+{%- for interface in interfaces %}
+class {{interface.name}}InterfaceBase {};
+
+using {{interface.name}}PtrDataView =
+    mojo::InterfacePtrDataView<{{interface.name}}InterfaceBase>;
+using {{interface.name}}RequestDataView =
+    mojo::InterfaceRequestDataView<{{interface.name}}InterfaceBase>;
+using {{interface.name}}AssociatedPtrInfoDataView =
+    mojo::AssociatedInterfacePtrInfoDataView<{{interface.name}}InterfaceBase>;
+using {{interface.name}}AssociatedRequestDataView =
+    mojo::AssociatedInterfaceRequestDataView<{{interface.name}}InterfaceBase>;
+
+{%- endfor %}
+
+{#--- Structs #}
+{%- for struct in structs %}
+{%-   if not struct|is_native_only_kind %}
+{%      include "struct_data_view_declaration.tmpl" %}
+{%-   endif %}
+{%- endfor %}
+
+{#--- Interface parameter definitions #}
+{%- for interface in interfaces %}
+{%-   for method in interface.methods %}
+{%-     set struct = method.param_struct %}
+{%      include "struct_data_view_declaration.tmpl" %}
+{%-     if method.response_parameters != None %}
+{%-       set struct = method.response_param_struct %}
+{%        include "struct_data_view_declaration.tmpl" %}
+{%-     endif %}
 {%-   endfor %}
+{%- endfor %}
+
+{#--- Unions #}
+{%- for union in unions %}
+{%    include "union_data_view_declaration.tmpl" %}
+{%- endfor %}
+
+{{namespace_end()}}
 
 namespace std {
 
 {%- from "enum_macros.tmpl" import enum_hash %}
 {%- for enum in all_enums %}
 {%-   if not enum|is_native_only_kind %}
 {{enum_hash(enum)}}
 {%-   endif %}
 {%- endfor %}
 
 }  // namespace std
 
 namespace mojo {
 
 {#--- Enum Serialization Helpers -#}
 {%- for enum in all_enums %}
 {%-   if not enum|is_native_only_kind %}
 {%      include "enum_serialization_declaration.tmpl" %}
 {%-   endif %}
 {%- endfor %}
 
+{#--- Struct Serialization Helpers -#}
+{%  for struct in structs %}
+{%-   if not struct|is_native_only_kind %}
+{%      include "struct_serialization_declaration.tmpl" %}
+{%-   endif %}
+{%- endfor %}
+
+{#--- Union Serialization Helpers -#}
+{%  if unions %}
+{%-   for union in unions %}
+{%      include "union_serialization_declaration.tmpl" %}
+{%-   endfor %}
+{%- endif %}
+
 }  // namespace mojo
 
+{{namespace_begin()}}
+
+{%- for struct in structs %}
+{%-   if not struct|is_native_only_kind %}
+{%      include "struct_data_view_definition.tmpl" %}
+{%-   endif %}
+{%- endfor %}
+
+{%- for interface in interfaces %}
+{%-   for method in interface.methods %}
+{%-     set struct = method.param_struct %}
+{%      include "struct_data_view_definition.tmpl" %}
+{%-     if method.response_parameters != None %}
+{%-       set struct = method.response_param_struct %}
+{%        include "struct_data_view_definition.tmpl" %}
+{%-     endif %}
+{%-   endfor %}
+{%- endfor %}
+
+{%- for union in unions %}
+{%    include "union_data_view_definition.tmpl" %}
+{%- endfor %}
+
+{{namespace_end()}}
+
 #endif  // {{header_guard}}