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// Copyright (c) 2011 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_RENDERER_RENDERER_WEBIDBCURSOR_IMPL_H_
#define CONTENT_RENDERER_RENDERER_WEBIDBCURSOR_IMPL_H_
#include <deque>
#include "base/basictypes.h"
#include "content/common/indexed_db_key.h"
#include "content/public/common/serialized_script_value.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebIDBCallbacks.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebIDBCursor.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebIDBKey.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebSerializedScriptValue.h"
class RendererWebIDBCursorImpl : public WebKit::WebIDBCursor {
public:
RendererWebIDBCursorImpl(int32 idb_cursor_id);
virtual ~RendererWebIDBCursorImpl();
virtual unsigned short direction() const;
virtual WebKit::WebIDBKey key() const;
virtual WebKit::WebIDBKey primaryKey() const;
virtual WebKit::WebSerializedScriptValue value() const;
virtual void update(const WebKit::WebSerializedScriptValue& value,
WebKit::WebIDBCallbacks* callback,
WebKit::WebExceptionCode& ec);
virtual void continueFunction(const WebKit::WebIDBKey& key,
WebKit::WebIDBCallbacks* callback,
WebKit::WebExceptionCode& ec);
virtual void deleteFunction(WebKit::WebIDBCallbacks* callback,
WebKit::WebExceptionCode& ec);
virtual void postSuccessHandlerCallback();
void SetKeyAndValue(const IndexedDBKey& key, const IndexedDBKey& primary_key,
const content::SerializedScriptValue& value);
void SetPrefetchData(
const std::vector<IndexedDBKey>& keys,
const std::vector<IndexedDBKey>& primary_keys,
const std::vector<content::SerializedScriptValue>& values);
void CachedContinue(WebKit::WebIDBCallbacks* callbacks);
void ResetPrefetchCache();
private:
int32 idb_cursor_id_;
IndexedDBKey key_;
IndexedDBKey primary_key_;
content::SerializedScriptValue value_;
// Prefetch cache.
std::deque<IndexedDBKey> prefetch_keys_;
std::deque<IndexedDBKey> prefetch_primary_keys_;
std::deque<content::SerializedScriptValue> prefetch_values_;
// Number of continue calls that would qualify for a pre-fetch.
int continue_count_;
// Number of items used from the last prefetch.
int used_prefetches_;
// Number of onsuccess handlers we are waiting for.
int pending_onsuccess_callbacks_;
// Number of items to request in next prefetch.
int prefetch_amount_;
enum { kPrefetchContinueThreshold = 2 };
enum { kMinPrefetchAmount = 5 };
enum { kMaxPrefetchAmount = 100 };
};
#endif // CONTENT_RENDERER_RENDERER_WEBIDBCURSOR_IMPL_H_
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