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// Copyright (c) 2010 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 CHROME_BROWSER_IN_PROCESS_WEBKIT_INDEXED_DB_CALLBACKS_H_
#define CHROME_BROWSER_IN_PROCESS_WEBKIT_INDEXED_DB_CALLBACKS_H_
#pragma once
#include "base/basictypes.h"
#include "base/logging.h"
#include "base/ref_counted.h"
#include "chrome/browser/in_process_webkit/indexed_db_dispatcher_host.h"
#include "chrome/common/indexed_db_key.h"
#include "chrome/common/render_messages.h"
#include "chrome/common/serialized_script_value.h"
#include "third_party/WebKit/WebKit/chromium/public/WebIDBCallbacks.h"
#include "third_party/WebKit/WebKit/chromium/public/WebIDBCursor.h"
#include "third_party/WebKit/WebKit/chromium/public/WebIDBTransactionCallbacks.h"
#include "third_party/WebKit/WebKit/chromium/public/WebIDBDatabaseError.h"
// Template magic to figure out what message to send to the renderer based on
// which (overloaded) onSuccess method we expect to be called.
template <class Type> struct WebIDBToMsgHelper { };
template <> struct WebIDBToMsgHelper<WebKit::WebIDBDatabase> {
typedef ViewMsg_IDBCallbacksSuccessIDBDatabase MsgType;
};
template <> struct WebIDBToMsgHelper<WebKit::WebIDBIndex> {
typedef ViewMsg_IDBCallbacksSuccessIDBIndex MsgType;
};
template <> struct WebIDBToMsgHelper<WebKit::WebIDBObjectStore> {
typedef ViewMsg_IDBCallbacksSuccessIDBObjectStore MsgType;
};
// The code the following two classes share.
class IndexedDBCallbacksBase : public WebKit::WebIDBCallbacks {
public:
IndexedDBCallbacksBase(
IndexedDBDispatcherHost* dispatcher_host, int32 response_id)
: dispatcher_host_(dispatcher_host), response_id_(response_id) { }
virtual void onError(const WebKit::WebIDBDatabaseError& error) {
dispatcher_host_->Send(new ViewMsg_IDBCallbacksError(
response_id_, error.code(), error.message()));
}
protected:
IndexedDBDispatcherHost* dispatcher_host() const {
return dispatcher_host_.get();
}
int32 response_id() const { return response_id_; }
private:
scoped_refptr<IndexedDBDispatcherHost> dispatcher_host_;
int32 response_id_;
DISALLOW_IMPLICIT_CONSTRUCTORS(IndexedDBCallbacksBase);
};
// A WebIDBCallbacks implementation that returns an object of WebObjectType.
template <class WebObjectType>
class IndexedDBCallbacks : public IndexedDBCallbacksBase {
public:
IndexedDBCallbacks(
IndexedDBDispatcherHost* dispatcher_host, int32 response_id)
: IndexedDBCallbacksBase(dispatcher_host, response_id) { }
virtual void onSuccess(WebObjectType* idb_object) {
int32 object_id = dispatcher_host()->Add(idb_object);
dispatcher_host()->Send(
new typename WebIDBToMsgHelper<WebObjectType>::MsgType(response_id(),
object_id));
}
private:
DISALLOW_IMPLICIT_CONSTRUCTORS(IndexedDBCallbacks);
};
// WebIDBCursor uses onSuccess(WebIDBCursor*) to indicate it has data, and
// onSuccess() without params to indicate it does not contain any data, i.e.,
// there is no key within the key range, or it has reached the end.
template <>
class IndexedDBCallbacks<WebKit::WebIDBCursor>
: public IndexedDBCallbacksBase {
public:
IndexedDBCallbacks(
IndexedDBDispatcherHost* dispatcher_host, int32 response_id)
: IndexedDBCallbacksBase(dispatcher_host, response_id) { }
virtual void onSuccess(WebKit::WebIDBCursor* idb_object) {
int32 object_id = dispatcher_host()->Add(idb_object);
dispatcher_host()->Send(
new ViewMsg_IDBCallbackSuccessOpenCursor(response_id(), object_id));
}
virtual void onSuccess() {
dispatcher_host()->Send(new ViewMsg_IDBCallbacksSuccessNull(response_id()));
}
private:
DISALLOW_IMPLICIT_CONSTRUCTORS(IndexedDBCallbacks);
};
// WebIDBKey is implemented in WebKit as opposed to being an interface Chromium
// implements. Thus we pass a const ___& version and thus we need this
// specialization.
template <>
class IndexedDBCallbacks<WebKit::WebIDBKey>
: public IndexedDBCallbacksBase {
public:
IndexedDBCallbacks(
IndexedDBDispatcherHost* dispatcher_host, int32 response_id)
: IndexedDBCallbacksBase(dispatcher_host, response_id) { }
virtual void onSuccess(const WebKit::WebIDBKey& value) {
dispatcher_host()->Send(
new ViewMsg_IDBCallbacksSuccessIndexedDBKey(
response_id(), IndexedDBKey(value)));
}
private:
DISALLOW_IMPLICIT_CONSTRUCTORS(IndexedDBCallbacks);
};
// WebSerializedScriptValue is implemented in WebKit as opposed to being an
// interface Chromium implements. Thus we pass a const ___& version and thus
// we need this specialization.
template <>
class IndexedDBCallbacks<WebKit::WebSerializedScriptValue>
: public IndexedDBCallbacksBase {
public:
IndexedDBCallbacks(
IndexedDBDispatcherHost* dispatcher_host, int32 response_id)
: IndexedDBCallbacksBase(dispatcher_host, response_id) { }
virtual void onSuccess(const WebKit::WebSerializedScriptValue& value) {
dispatcher_host()->Send(
new ViewMsg_IDBCallbacksSuccessSerializedScriptValue(
response_id(), SerializedScriptValue(value)));
}
private:
DISALLOW_IMPLICIT_CONSTRUCTORS(IndexedDBCallbacks);
};
// A WebIDBCallbacks implementation that doesn't return a result.
template <>
class IndexedDBCallbacks<void> : public IndexedDBCallbacksBase {
public:
IndexedDBCallbacks(
IndexedDBDispatcherHost* dispatcher_host, int32 response_id)
: IndexedDBCallbacksBase(dispatcher_host, response_id) { }
virtual void onSuccess() {
dispatcher_host()->Send(
new ViewMsg_IDBCallbacksSuccessNull(response_id()));
}
private:
DISALLOW_IMPLICIT_CONSTRUCTORS(IndexedDBCallbacks);
};
class IndexedDBTransactionCallbacks
: public WebKit::WebIDBTransactionCallbacks {
public:
IndexedDBTransactionCallbacks(
IndexedDBDispatcherHost* dispatcher_host, int transaction_id)
: dispatcher_host_(dispatcher_host), transaction_id_(transaction_id) {
}
virtual void onAbort() {
dispatcher_host_->Send(new ViewMsg_IDBTransactionCallbacksAbort(
transaction_id_));
}
virtual int id() const {
return transaction_id_;
}
private:
int transaction_id_;
scoped_refptr<IndexedDBDispatcherHost> dispatcher_host_;
};
#endif // CHROME_BROWSER_IN_PROCESS_WEBKIT_INDEXED_DB_CALLBACKS_H_
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