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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_PLUGINS_PLUGIN_PREFS_H_
#define CHROME_BROWSER_PLUGINS_PLUGIN_PREFS_H_
#include <map>
#include <set>
#include <vector>
#include "base/basictypes.h"
#include "base/files/file_path.h"
#include "base/prefs/pref_change_registrar.h"
#include "base/prefs/pref_service.h"
#include "base/synchronization/lock.h"
#include "chrome/browser/plugins/plugin_finder.h"
#include "components/keyed_service/content/refcounted_browser_context_keyed_service.h"
class Profile;
namespace base {
class ListValue;
}
namespace content {
struct WebPluginInfo;
}
// 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 RefcountedBrowserContextKeyedService {
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);
// 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 base::string16& group_name);
// Enables or disables a specific plug-in file, if possible.
// If the plug-in state can't be changed (because of a policy for example)
// then enabling/disabling the plug-in is ignored and |callback| is run
// with 'false' passed to it. Otherwise the plug-in state is changed
// and |callback| is run with 'true' passed to it.
void EnablePlugin(bool enable, const base::FilePath& file_path,
const base::Callback<void(bool)>& callback);
// Returns whether there is a policy enabling or disabling plug-ins of the
// given name.
PolicyStatus PolicyStatusForPlugin(const base::string16& name) const;
// Returns whether the plugin is enabled or not.
bool IsPluginEnabled(const content::WebPluginInfo& plugin) const;
void set_profile(Profile* profile) { profile_ = profile; }
// RefCountedProfileKeyedBase method override.
virtual void ShutdownOnUIThread() OVERRIDE;
private:
friend class base::RefCountedThreadSafe<PluginPrefs>;
friend class PluginPrefsTest;
// PluginState stores a mapping from plugin path to enable/disable state. We
// don't simply use a std::map, because we would like to keep the state of
// some plugins in sync with each other.
class PluginState {
public:
PluginState();
~PluginState();
// Returns whether |plugin| is found. If |plugin| cannot be found,
// |*enabled| won't be touched.
bool Get(const base::FilePath& plugin, bool* enabled) const;
void Set(const base::FilePath& plugin, bool enabled);
private:
base::FilePath ConvertMapKey(const base::FilePath& plugin) const;
std::map<base::FilePath, bool> state_;
};
virtual ~PluginPrefs();
// Called to update one of the policy_xyz patterns below when a
// preference changes.
void UpdatePatternsAndNotify(std::set<base::string16>* patterns,
const std::string& pref_name);
// Allows unit tests to directly set enforced plug-in patterns.
void SetPolicyEnforcedPluginPatterns(
const std::set<base::string16>& disabled_patterns,
const std::set<base::string16>& disabled_exception_patterns,
const std::set<base::string16>& enabled_patterns);
// Callback for after the plugin groups have been loaded.
void EnablePluginGroupInternal(
bool enabled,
const base::string16& group_name,
const std::vector<content::WebPluginInfo>& plugins);
void EnablePluginInternal(
bool enabled,
const base::FilePath& path,
PluginFinder* plugin_finder,
const base::Callback<void(bool)>& callback,
const std::vector<content::WebPluginInfo>& plugins);
// Called on the UI thread with the plugin data to save the preferences.
void OnUpdatePreferences(const std::vector<content::WebPluginInfo>& plugins);
// Sends the notification that plugin data has changed.
void NotifyPluginStatusChanged();
static void ListValueToStringSet(const base::ListValue* src,
std::set<base::string16>* dest);
// Checks if |name| matches any of the patterns in |pattern_set|.
static bool IsStringMatchedInSet(const base::string16& name,
const std::set<base::string16>& pattern_set);
// Guards access to the following data structures.
mutable base::Lock lock_;
PluginState plugin_state_;
std::map<base::string16, bool> plugin_group_state_;
std::set<base::string16> policy_disabled_plugin_patterns_;
std::set<base::string16> policy_disabled_plugin_exception_patterns_;
std::set<base::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_;
PrefChangeRegistrar registrar_;
DISALLOW_COPY_AND_ASSIGN(PluginPrefs);
};
#endif // CHROME_BROWSER_PLUGINS_PLUGIN_PREFS_H_
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