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| 1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #ifndef CHROME_FRAME_READY_MODE_INTERNAL_REGISTRY_READY_MODE_STATE_H_ | |
| 6 #define CHROME_FRAME_READY_MODE_INTERNAL_REGISTRY_READY_MODE_STATE_H_ | |
| 7 | |
| 8 #include <string> | |
| 9 | |
| 10 #include "base/basictypes.h" | |
| 11 #include "base/memory/scoped_ptr.h" | |
| 12 #include "base/time/time.h" | |
| 13 #include "chrome_frame/ready_mode/internal/ready_mode_state.h" | |
| 14 | |
| 15 // Defines the possible Ready Mode states. | |
| 16 enum ReadyModeStatus { | |
| 17 // Chrome Frame is permanently disabled and should be uninstalled. | |
| 18 READY_MODE_PERMANENTLY_DECLINED, | |
| 19 // Chrome Frame is temporarily disabled. | |
| 20 READY_MODE_TEMPORARILY_DECLINED, | |
| 21 // Chrome Frame is disabled, but should be enabled by calling | |
| 22 // ExpireTemporaryDecline(). | |
| 23 READY_MODE_TEMPORARY_DECLINE_EXPIRED, | |
| 24 // Chrome Frame is enabled, but not permanently (the user should be prompted). | |
| 25 READY_MODE_ACTIVE, | |
| 26 // Chrome Frame is permanently enabled. | |
| 27 READY_MODE_ACCEPTED | |
| 28 }; | |
| 29 | |
| 30 // Implements ReadyModeState, reading state from the Registry and delegating | |
| 31 // to the installer to effect state changes. | |
| 32 // | |
| 33 // If the current process is running at high integrity the installer is | |
| 34 // launched directly. Otherwise, it is launched by invoking a helper exe | |
| 35 // (chrome_launcher) at medium integrity (thanks to an elevation policy) that, | |
| 36 // in turn, delegates to Omaha's ProcessLauncher to reach high integrity. | |
| 37 class RegistryReadyModeState : public ReadyModeState { | |
| 38 public: | |
| 39 // Receives notification when the Ready Mode state changes in response to a | |
| 40 // user interaction. Does not receive notification when a temporary decline of | |
| 41 // Ready Mode expires. | |
| 42 class Observer { | |
| 43 public: | |
| 44 virtual ~Observer() {} | |
| 45 // Indicates that a state change has occurred, passing the new status. | |
| 46 virtual void OnStateChange(ReadyModeStatus status) = 0; | |
| 47 }; | |
| 48 | |
| 49 // Constructs an instance backed by the specified key (pre-existing under | |
| 50 // HKCU or HKLM). The provided duration indicates how long, after a temporary | |
| 51 // decline, Ready Mode re-activates. | |
| 52 // | |
| 53 // Takes ownership of the Observer instance, which may be null if the client | |
| 54 // does not need to be notified of changes. | |
| 55 RegistryReadyModeState(const std::wstring& key_name, | |
| 56 base::TimeDelta temporary_decline_duration, | |
| 57 Observer* observer); | |
| 58 virtual ~RegistryReadyModeState(); | |
| 59 | |
| 60 // Returns the current Ready Mode status. | |
| 61 ReadyModeStatus GetStatus(); | |
| 62 | |
| 63 // Transitions from temporarily declined to active Ready Mode. | |
| 64 void ExpireTemporaryDecline(); | |
| 65 | |
| 66 // ReadyModeState implementation | |
| 67 virtual void TemporarilyDeclineChromeFrame(); | |
| 68 virtual void PermanentlyDeclineChromeFrame(); | |
| 69 virtual void AcceptChromeFrame(); | |
| 70 | |
| 71 protected: | |
| 72 // Allows dependency replacement via derivation for tests. | |
| 73 virtual base::Time GetNow(); | |
| 74 | |
| 75 private: | |
| 76 // Sends the result of GetStatus() to our observer. | |
| 77 void NotifyObserver(); | |
| 78 // Retrieves state from the registry. Returns true upon success. | |
| 79 bool GetStateFromRegistry(int64* value, bool* exists); | |
| 80 // Refreshes the process state after mutating installation state. | |
| 81 void RefreshStateAndNotify(); | |
| 82 | |
| 83 base::TimeDelta temporary_decline_duration_; | |
| 84 std::wstring key_name_; | |
| 85 scoped_ptr<Observer> observer_; | |
| 86 | |
| 87 DISALLOW_COPY_AND_ASSIGN(RegistryReadyModeState); | |
| 88 }; | |
| 89 | |
| 90 #endif // CHROME_FRAME_READY_MODE_INTERNAL_REGISTRY_READY_MODE_STATE_H_ | |
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