[IndexedDB] Propogating changes to observers : Renderer

content/common/indexed_db/indexed_db_observation.h

+// 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.
+
+#ifndef CONTENT_COMMON_INDEXED_DB_INDEXED_DB_OBSERVATION_H_
+#define CONTENT_COMMON_INDEXED_DB_INDEXED_DB_OBSERVATION_H_
+
+#include "base/macros.h"
+#include "content/browser/indexed_db/indexed_db_value.h"
+#include "content/common/content_export.h"
+#include "content/common/indexed_db/indexed_db_key_range.h"
+
+namespace content {
+
+class CONTENT_EXPORT IndexedDBObservation {
+ public:
+  enum OperationType {
+    ADD = 0,
+    PUT,
+    DELETE,
+    CLEAR,
+  };
+
+  IndexedDBObservation(OperationType);
+  IndexedDBObservation(OperationType, IndexedDBKeyRange);
+  IndexedDBObservation(OperationType, IndexedDBKeyRange, IndexedDBValue);
+
+  ~IndexedDBObservation();
+
+  OperationType type() const { return type_; }
+  IndexedDBKeyRange key_range() const { return key_range_; }
+  IndexedDBValue value() const { return value_; }
+
+ private:
+  // Required.
+  OperationType type_;
+  // Populated for ADD, PUT, and DELETE operations.
+  IndexedDBKeyRange key_range_;
+  // Populated for ADD and PUT operations if values are requested.
+  IndexedDBValue value_;
+
+  DISALLOW_COPY_AND_ASSIGN(IndexedDBObservation);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_COMMON_INDEXED_DB_INDEXED_DB_OBSERVATION_H_