Migrate the IndexedDB backend from Blink to Chromium

content/browser/indexed_db/indexed_db_cursor_impl.h

+// Copyright (c) 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.
+
+#ifndef CONTENT_BROWSER_INDEXED_DB_INDEXED_DB_CURSOR_IMPL_H_
+#define CONTENT_BROWSER_INDEXED_DB_INDEXED_DB_CURSOR_IMPL_H_
+
+#include <vector>
+
+#include "base/basictypes.h"
+#include "base/memory/ref_counted.h"
+#include "base/memory/scoped_ptr.h"
+#include "content/browser/indexed_db/indexed_db_backing_store.h"
+#include "content/browser/indexed_db/indexed_db_cursor.h"
+#include "content/browser/indexed_db/indexed_db_database.h"
+#include "content/common/indexed_db/indexed_db_key_range.h"
+
+namespace content {
+
+class IndexedDBDatabaseImpl;
+class IndexedDBTransaction;
+
+class IndexedDBCursorImpl : public IndexedDBCursor {
+ public:
+  static scoped_refptr<IndexedDBCursorImpl> Create(
+      scoped_ptr<IndexedDBBackingStore::Cursor> cursor,
+      indexed_db::CursorType cursor_type,
+      IndexedDBTransaction* transaction,
+      int64 object_store_id) {
+    return make_scoped_refptr(
+        new IndexedDBCursorImpl(cursor.Pass(),
+                                cursor_type,
+                                IndexedDBDatabase::NORMAL_TASK,
+                                transaction,
+                                object_store_id));
+  }
+  static scoped_refptr<IndexedDBCursorImpl> Create(
+      scoped_ptr<IndexedDBBackingStore::Cursor> cursor,
+      indexed_db::CursorType cursor_type,
+      IndexedDBDatabase::TaskType task_type,
+      IndexedDBTransaction* transaction,
+      int64 object_store_id) {
+    return make_scoped_refptr(new IndexedDBCursorImpl(
+        cursor.Pass(), cursor_type, task_type, transaction, object_store_id));
+  }
+
+  // IndexedDBCursor
+  virtual void Advance(unsigned long,
+                       scoped_refptr<IndexedDBCallbacksWrapper> callbacks)
+      OVERRIDE;
+  virtual void ContinueFunction(
+      scoped_ptr<IndexedDBKey> key,
+      scoped_refptr<IndexedDBCallbacksWrapper> callbacks) OVERRIDE;
+  virtual void DeleteFunction(
+      scoped_refptr<IndexedDBCallbacksWrapper> callbacks) OVERRIDE;
+  virtual void PrefetchContinue(
+      int number_to_fetch,
+      scoped_refptr<IndexedDBCallbacksWrapper> callbacks) OVERRIDE;
+  virtual void PrefetchReset(int used_prefetches, int unused_prefetches)
+      OVERRIDE;
+  virtual void PostSuccessHandlerCallback() OVERRIDE {}
+
+  const IndexedDBKey& key() const { return cursor_->key(); }
+  const IndexedDBKey& primary_key() const { return cursor_->primary_key(); }
+  std::vector<char>* Value() const {
+    return (cursor_type_ == indexed_db::CURSOR_KEY_ONLY) ? NULL
+                                                         : cursor_->Value();
+  }
+  void Close();
+
+ private:
+  IndexedDBCursorImpl(scoped_ptr<IndexedDBBackingStore::Cursor> cursor,
+                      indexed_db::CursorType cursor_type,
+                      IndexedDBDatabase::TaskType task_type,
+                      IndexedDBTransaction* transaction,
+                      int64 object_store_id);
+  virtual ~IndexedDBCursorImpl();
+
+  class CursorIterationOperation;
+  class CursorAdvanceOperation;
+  class CursorPrefetchIterationOperation;
+
+  IndexedDBDatabase::TaskType task_type_;
+  indexed_db::CursorType cursor_type_;
+  const scoped_refptr<IndexedDBTransaction> transaction_;
+  const int64 object_store_id_;
+
+  // Must be destroyed before transaction_.
+  scoped_ptr<IndexedDBBackingStore::Cursor> cursor_;
+  // Must be destroyed before transaction_.
+  scoped_ptr<IndexedDBBackingStore::Cursor> saved_cursor_;
+
+  bool closed_;
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_INDEXED_DB_INDEXED_DB_CURSOR_IMPL_H_