Generate the proto JSON converter for DOM distiller

third_party/dom_distiller_js/protoc_plugins/util/types.py

Index: third_party/dom_distiller_js/protoc_plugins/util/types.py
diff --git a/third_party/dom_distiller_js/protoc_plugins/util/types.py b/third_party/dom_distiller_js/protoc_plugins/util/types.py
new file mode 100644
index 0000000000000000000000000000000000000000..99513be5cac599a6bad4e1be6ce26ac856dadeab
--- /dev/null
+++ b/third_party/dom_distiller_js/protoc_plugins/util/types.py
@@ -0,0 +1,150 @@
+# 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.
+
+from google.protobuf.descriptor_pb2 import FieldDescriptorProto
+
+import plugin
+
+_cpp_base_type_map = {
+    FieldDescriptorProto.TYPE_DOUBLE: 'double',
+    FieldDescriptorProto.TYPE_FLOAT: 'float',
+    FieldDescriptorProto.TYPE_INT64: None,
+    FieldDescriptorProto.TYPE_UINT64: None,
+    FieldDescriptorProto.TYPE_INT32: 'int',
+    FieldDescriptorProto.TYPE_FIXED64: None,
+    FieldDescriptorProto.TYPE_FIXED32: None,
+    FieldDescriptorProto.TYPE_BOOL: 'bool',
+    FieldDescriptorProto.TYPE_STRING: 'std::string',
+    FieldDescriptorProto.TYPE_GROUP: None,
+    FieldDescriptorProto.TYPE_MESSAGE: None,
+    FieldDescriptorProto.TYPE_BYTES: None,
+    FieldDescriptorProto.TYPE_UINT32: None,
+    FieldDescriptorProto.TYPE_ENUM: 'int',
+    FieldDescriptorProto.TYPE_SFIXED32: None,
+    FieldDescriptorProto.TYPE_SFIXED64: None,
+    FieldDescriptorProto.TYPE_SINT32: None,
+    FieldDescriptorProto.TYPE_SINT64: None,
+}
+
+# Maps c++ types to names used in base::Value methods (like GetDouble,
+# GetInteger, etc).
+_cpp_type_to_value_type_map = {
+    'double': 'Double',
+    'float': 'Double',
+    'int': 'Integer',
+    'bool': 'Boolean',
+    'std::string': 'String',
+}
+
+
+def GetCppPrimitiveType(type_name):
+  return _cpp_base_type_map[type_name]
+
+
+def GetCppValueType(primitive_type):
+  return _cpp_type_to_value_type_map[primitive_type]
+
+
+# TYPE_ENUM and TYPE_MESSAGE are supported, but their types depend on type_name.
+_java_base_type_map = {
+    FieldDescriptorProto.TYPE_DOUBLE: 'double',
+    FieldDescriptorProto.TYPE_FLOAT: 'float',
+    FieldDescriptorProto.TYPE_INT64: None,
+    FieldDescriptorProto.TYPE_UINT64: None,
+    FieldDescriptorProto.TYPE_INT32: 'int',
+    FieldDescriptorProto.TYPE_FIXED64: None,
+    FieldDescriptorProto.TYPE_FIXED32: None,
+    FieldDescriptorProto.TYPE_BOOL: 'boolean',
+    FieldDescriptorProto.TYPE_STRING: 'String',
+    FieldDescriptorProto.TYPE_GROUP: None,
+    FieldDescriptorProto.TYPE_MESSAGE: None,
+    FieldDescriptorProto.TYPE_BYTES: None,
+    FieldDescriptorProto.TYPE_UINT32: None,
+    FieldDescriptorProto.TYPE_ENUM: None,
+    FieldDescriptorProto.TYPE_SFIXED32: None,
+    FieldDescriptorProto.TYPE_SFIXED64: None,
+    FieldDescriptorProto.TYPE_SINT32: None,
+    FieldDescriptorProto.TYPE_SINT64: None,
+}
+
+
+# Maps java primitive types to java types usable in containers (e.g.
+# List<Integer>).
+_java_primitive_to_object_map = {
+    'boolean': 'Boolean',
+    'int': 'Integer',
+    'long': 'Long',
+    'float': 'Float',
+    'double': 'Double',
+}
+
+
+def GetJavaPrimitiveType(field_type):
+  return _java_base_type_map[field_type]
+
+
+def GetJavaObjectType(java_base_type):
+  if not java_base_type in _java_primitive_to_object_map:
+    return java_base_type
+  return _java_primitive_to_object_map[java_base_type]
+
+
+_proto_cpp_converter_class_map = {}
+_proto_java_class_map = {}
+
+def ResolveCppConverterType(s):
+  if s.startswith('.'):
+    s = s[1:]
+    return _proto_cpp_converter_class_map[s]
+  return s
+
+
+def ResolveJavaClassType(s):
+  if s.startswith('.'):
+    s = s[1:]
+    return _proto_java_class_map[s]
+  return s
+
+
+class QualifiedTypes(object):
+  def __init__(self, proto, java, cpp_base, cpp_converter):
+    self.proto = proto
+    self.java = java
+
+    # cpp_base is the standard protoc-generated class for this type.
+    self.cpp_base = cpp_base
+    self.cpp_converter = cpp_converter
+
+  def Register(self):
+    _proto_cpp_converter_class_map[self.proto] = self.cpp_converter
+    _proto_java_class_map[self.proto] = self.java
+
+
+def QualifiedTypesForChild(name, parent_typenames):
+  title_name = plugin.TitleCase(name)
+  proto = parent_typenames.proto + '.' + name
+  java = parent_typenames.java + '.' + title_name
+  cpp_base = parent_typenames.cpp_base + '::' + title_name
+  cpp_converter = parent_typenames.cpp_converter + '::' + title_name
+  return QualifiedTypes(proto, java, cpp_base, cpp_converter)
+
+
+def RegisterTypesForEnum(proto_enum):
+  proto_enum.QualifiedTypes().Register()
+
+
+def RegisterTypesForMessage(proto_message):
+  proto_message.QualifiedTypes().Register()
+  for enum in proto_message.GetEnums():
+    RegisterTypesForEnum(enum)
+  for child in proto_message.GetMessages():
+    RegisterTypesForMessage(child)
+
+
+def RegisterTypesForFile(proto_file):
+  for enum in proto_file.GetEnums():
+    RegisterTypesForEnum(enum)
+  for message in proto_file.GetMessages():
+    RegisterTypesForMessage(message)
+