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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 CHROME_BROWSER_EXTENSIONS_EXTERNAL_PREF_EXTENSION_LOADER_H_
#define CHROME_BROWSER_EXTENSIONS_EXTERNAL_PREF_EXTENSION_LOADER_H_
#pragma once
#include "chrome/browser/extensions/external_extension_loader.h"
#include <string>
#include "base/compiler_specific.h"
#include "base/memory/scoped_ptr.h"
#include "base/values.h"
// A specialization of the ExternalExtensionLoader that uses a json file to
// look up which external extensions are registered.
// Instances of this class are expected to be created and destroyed on the UI
// thread and they are expecting public method calls from the UI thread.
class ExternalPrefExtensionLoader : public ExternalExtensionLoader {
public:
enum Options {
NONE = 0,
// Ensure that only root can force an external install by checking
// that all components of the path to external extensions files are
// owned by root and not writable by any non-root user.
ENSURE_PATH_CONTROLLED_BY_ADMIN = 1 << 0
};
// |base_path_key| is the directory containing the external_extensions.json
// file. Relative file paths to extension files are resolved relative
// to this path.
explicit ExternalPrefExtensionLoader(int base_path_key, Options options);
virtual const FilePath GetBaseCrxFilePath() OVERRIDE;
protected:
virtual void StartLoading() OVERRIDE;
bool IsOptionSet(Options option) {
return (options_ & option) != 0;
}
private:
friend class base::RefCountedThreadSafe<ExternalExtensionLoader>;
virtual ~ExternalPrefExtensionLoader() {}
DictionaryValue* ReadJsonPrefsFile();
void LoadOnFileThread();
int base_path_key_;
Options options_;
FilePath base_path_;
DISALLOW_COPY_AND_ASSIGN(ExternalPrefExtensionLoader);
};
// A simplified version of ExternalPrefExtensionLoader that loads the dictionary
// from json data specified in a string.
class ExternalTestingExtensionLoader : public ExternalExtensionLoader {
public:
ExternalTestingExtensionLoader(
const std::string& json_data,
const FilePath& fake_base_path);
virtual const FilePath GetBaseCrxFilePath() OVERRIDE;
protected:
virtual void StartLoading() OVERRIDE;
private:
friend class base::RefCountedThreadSafe<ExternalExtensionLoader>;
virtual ~ExternalTestingExtensionLoader();
FilePath fake_base_path_;
scoped_ptr<DictionaryValue> testing_prefs_;
DISALLOW_COPY_AND_ASSIGN(ExternalTestingExtensionLoader);
};
#endif // CHROME_BROWSER_EXTENSIONS_EXTERNAL_PREF_EXTENSION_LOADER_H_
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