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// Copyright (c) 2012 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_EXTENSIONS_API_STORAGE_STORAGE_API_H_
#define CHROME_BROWSER_EXTENSIONS_API_STORAGE_STORAGE_API_H_
#include "base/compiler_specific.h"
#include "base/memory/ref_counted.h"
#include "chrome/browser/extensions/api/storage/settings_namespace.h"
#include "chrome/browser/extensions/api/storage/settings_observer.h"
#include "chrome/browser/extensions/chrome_extension_function.h"
#include "chrome/browser/value_store/value_store.h"
namespace extensions {
// Superclass of all settings functions.
class SettingsFunction : public ChromeAsyncExtensionFunction {
protected:
SettingsFunction();
virtual ~SettingsFunction();
// ExtensionFunction:
virtual bool ShouldSkipQuotaLimiting() const OVERRIDE;
virtual bool RunImpl() OVERRIDE;
// Extension settings function implementations should do their work here.
// The SettingsFrontend makes sure this is posted to the appropriate thread.
// Implementations should fill in args themselves, though (like RunImpl)
// may return false to imply failure.
virtual bool RunWithStorage(ValueStore* storage) = 0;
// Sets error_ or result_ depending on the value of a storage ReadResult, and
// returns whether the result implies success (i.e. !error).
bool UseReadResult(ValueStore::ReadResult result);
// Sets error_ depending on the value of a storage WriteResult, sends a
// change notification if needed, and returns whether the result implies
// success (i.e. !error).
bool UseWriteResult(ValueStore::WriteResult result);
private:
// Called via PostTask from RunImpl. Calls RunWithStorage and then
// SendResponse with its success value.
void AsyncRunWithStorage(ValueStore* storage);
// The settings namespace the call was for. For example, SYNC if the API
// call was chrome.settings.experimental.sync..., LOCAL if .local, etc.
settings_namespace::Namespace settings_namespace_;
// Observers, cached so that it's only grabbed from the UI thread.
scoped_refptr<SettingsObserverList> observers_;
};
class StorageStorageAreaGetFunction : public SettingsFunction {
public:
DECLARE_EXTENSION_FUNCTION("storage.get", STORAGE_GET)
protected:
virtual ~StorageStorageAreaGetFunction() {}
// SettingsFunction:
virtual bool RunWithStorage(ValueStore* storage) OVERRIDE;
};
class StorageStorageAreaSetFunction : public SettingsFunction {
public:
DECLARE_EXTENSION_FUNCTION("storage.set", STORAGE_SET)
protected:
virtual ~StorageStorageAreaSetFunction() {}
// SettingsFunction:
virtual bool RunWithStorage(ValueStore* storage) OVERRIDE;
// ExtensionFunction:
virtual void GetQuotaLimitHeuristics(
QuotaLimitHeuristics* heuristics) const OVERRIDE;
};
class StorageStorageAreaRemoveFunction : public SettingsFunction {
public:
DECLARE_EXTENSION_FUNCTION("storage.remove", STORAGE_REMOVE)
protected:
virtual ~StorageStorageAreaRemoveFunction() {}
// SettingsFunction:
virtual bool RunWithStorage(ValueStore* storage) OVERRIDE;
// ExtensionFunction:
virtual void GetQuotaLimitHeuristics(
QuotaLimitHeuristics* heuristics) const OVERRIDE;
};
class StorageStorageAreaClearFunction : public SettingsFunction {
public:
DECLARE_EXTENSION_FUNCTION("storage.clear", STORAGE_CLEAR)
protected:
virtual ~StorageStorageAreaClearFunction() {}
// SettingsFunction:
virtual bool RunWithStorage(ValueStore* storage) OVERRIDE;
// ExtensionFunction:
virtual void GetQuotaLimitHeuristics(
QuotaLimitHeuristics* heuristics) const OVERRIDE;
};
class StorageStorageAreaGetBytesInUseFunction : public SettingsFunction {
public:
DECLARE_EXTENSION_FUNCTION("storage.getBytesInUse", STORAGE_GETBYTESINUSE)
protected:
virtual ~StorageStorageAreaGetBytesInUseFunction() {}
// SettingsFunction:
virtual bool RunWithStorage(ValueStore* storage) OVERRIDE;
};
} // namespace extensions
#endif // CHROME_BROWSER_EXTENSIONS_API_STORAGE_STORAGE_API_H_
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