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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_PLUGIN_PREFS_H_
#define CHROME_BROWSER_PLUGIN_PREFS_H_
#pragma once
#include <map>
#include <set>
#include <vector>
#include "base/basictypes.h"
#include "base/file_path.h"
#include "base/synchronization/lock.h"
#include "chrome/browser/prefs/pref_change_registrar.h"
#include "chrome/browser/profiles/refcounted_profile_keyed_service.h"
#include "content/public/browser/notification_observer.h"
class Profile;
namespace base {
class ListValue;
}
namespace webkit {
struct WebPluginInfo;
namespace npapi {
class PluginGroup;
class PluginList;
}
}
// This class stores information about whether a plug-in or a plug-in group is
// enabled or disabled.
// Except where otherwise noted, it can be used on every thread.
class PluginPrefs : public RefcountedProfileKeyedService,
public content::NotificationObserver {
public:
enum PolicyStatus {
NO_POLICY = 0, // Neither enabled or disabled by policy.
POLICY_ENABLED,
POLICY_DISABLED,
};
// Returns the instance associated with |profile|, creating it if necessary.
static scoped_refptr<PluginPrefs> GetForProfile(Profile* profile);
// Usually the PluginPrefs associated with a TestingProfile is NULL.
// This method overrides that for a given TestingProfile, returning the newly
// created PluginPrefs object.
static scoped_refptr<PluginPrefs> GetForTestingProfile(Profile* profile);
// Sets the plug-in list for tests.
void SetPluginListForTesting(webkit::npapi::PluginList* plugin_list);
// Creates a new instance. This method should only be used for testing.
PluginPrefs();
// Associates this instance with |prefs|. This enables or disables
// plugin groups as defined by the user's preferences.
// This method should only be called on the UI thread.
void SetPrefs(PrefService* prefs);
// Enable or disable a plugin group.
void EnablePluginGroup(bool enable, const string16& group_name);
// Returns true if the plug-in state can be enabled or disabled according to
// |enable|, false if the plug-in state cannot be changed because of a policy.
bool CanEnablePlugin(bool enable, const FilePath& file_path);
// Enables or disables a specific plugin file, and calls |callback|
// afterwards.
// If the plug-in state cannot be changed because of a policy (as indicated
// by |CanEnablePlugin|), it will be silently ignored.
void EnablePlugin(bool enable, const FilePath& file_path,
const base::Closure& callback);
// Enables or disables a plug-in in all profiles, and calls |callback|
// afterwards. This sets a default for profiles which are created later as
// well.
// If the plug-in state in a profile cannot be changed because of a policy,
// it will be silently ignored.
// This method should only be called on the UI thread.
static void EnablePluginGlobally(bool enable, const FilePath& file_path,
const base::Closure& callback);
// Returns whether there is a policy enabling or disabling plug-ins of the
// given name.
PolicyStatus PolicyStatusForPlugin(const string16& name) const;
// Returns whether the plugin is enabled or not.
bool IsPluginEnabled(const webkit::WebPluginInfo& plugin) const;
// Registers the preferences used by this class.
// This method should only be called on the UI thread.
static void RegisterPrefs(PrefService* prefs);
void set_profile(Profile* profile) { profile_ = profile; }
// RefCountedProfileKeyedBase method override.
virtual void ShutdownOnUIThread() OVERRIDE;
// content::NotificationObserver method override.
virtual void Observe(int type,
const content::NotificationSource& source,
const content::NotificationDetails& details) OVERRIDE;
private:
friend class base::RefCountedThreadSafe<PluginPrefs>;
friend class PluginPrefsTest;
virtual ~PluginPrefs();
// Allows unit tests to directly set enforced plug-in patterns.
void SetPolicyEnforcedPluginPatterns(
const std::set<string16>& disabled_patterns,
const std::set<string16>& disabled_exception_patterns,
const std::set<string16>& enabled_patterns);
// Returns the plugin list to use, either the singleton or the override.
webkit::npapi::PluginList* GetPluginList() const;
// Callback for after the plugin groups have been loaded.
void EnablePluginGroupInternal(
bool enabled,
const string16& group_name,
const std::vector<webkit::npapi::PluginGroup>& groups);
void EnablePluginInternal(
bool enabled,
const FilePath& path,
const base::Closure& callback,
const std::vector<webkit::npapi::PluginGroup>& groups);
// Called on the file thread to get the data necessary to update the saved
// preferences.
void GetPreferencesDataOnFileThread();
// Called on the UI thread with the plugin data to save the preferences.
void OnUpdatePreferences(
const std::vector<webkit::npapi::PluginGroup>& groups);
// Sends the notification that plugin data has changed.
void NotifyPluginStatusChanged();
static void ListValueToStringSet(const base::ListValue* src,
std::set<string16>* dest);
// Checks if |name| matches any of the patterns in |pattern_set|.
static bool IsStringMatchedInSet(const string16& name,
const std::set<string16>& pattern_set);
// Guards access to the following data structures.
mutable base::Lock lock_;
std::map<FilePath, bool> plugin_state_;
std::map<string16, bool> plugin_group_state_;
std::set<string16> policy_disabled_plugin_patterns_;
std::set<string16> policy_disabled_plugin_exception_patterns_;
std::set<string16> policy_enabled_plugin_patterns_;
// Weak pointer, owns us. Only used as a notification source.
Profile* profile_;
// Weak pointer, owned by the profile.
PrefService* prefs_;
// PluginList to use for testing. If this is NULL, defaults to the global
// singleton.
webkit::npapi::PluginList* plugin_list_;
PrefChangeRegistrar registrar_;
DISALLOW_COPY_AND_ASSIGN(PluginPrefs);
};
#endif // CHROME_BROWSER_PLUGIN_PREFS_H_
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