Don't show system notifications while the screen is locked.

chromeos/dbus/power_manager_client.cc

 // 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.
 
 #include "chromeos/dbus/power_manager_client.h"
 
 #include <algorithm>
 
 #include "base/bind.h"
 #include "base/callback.h"
@@ skipping 11 matching lines @@
 #include "dbus/object_proxy.h"
 #include "third_party/cros_system_api/dbus/service_constants.h"
 
 namespace chromeos {
 
 // The PowerManagerClient implementation used in production.
 class PowerManagerClientImpl : public PowerManagerClient {
  public:
   explicit PowerManagerClientImpl(dbus::Bus* bus)
       : power_manager_proxy_(NULL),
+        screen_locked_(false),
         weak_ptr_factory_(this) {
     power_manager_proxy_ = bus->GetObjectProxy(
         power_manager::kPowerManagerServiceName,
         dbus::ObjectPath(power_manager::kPowerManagerServicePath));
 
     session_manager_proxy_ = bus->GetObjectProxy(
         login_manager::kSessionManagerServiceName,
         dbus::ObjectPath(login_manager::kSessionManagerServicePath));
 
     // Monitor the D-Bus signal for brightness changes. Only the power
@@ skipping 221 matching lines @@
   }
 
   virtual void NotifyScreenUnlockRequested() OVERRIDE {
     SimpleMethodCallToPowerManager(power_manager::kRequestUnlockScreenMethod);
   }
 
   virtual void NotifyScreenUnlockCompleted() OVERRIDE {
     SimpleMethodCallToPowerManager(power_manager::kScreenIsUnlockedMethod);
   }
 
+  virtual bool GetIsScreenLocked() OVERRIDE {
+    return screen_locked_;
+  }
+
  private:
   // Called when a dbus signal is initially connected.
   void SignalConnected(const std::string& interface_name,
                        const std::string& signal_name,
                        bool success) {
     LOG_IF(WARNING, !success) << "Failed to connect to signal "
                               << signal_name << ".";
   }
 
   // Make a method call to power manager with no arguments and no response.
@@ skipping 147 matching lines @@
       LOG(ERROR) << "Error reading response from powerd: "
                  << response->ToString();
     callback.Run(percent);
   }
 
   void ScreenLockSignalReceived(dbus::Signal* signal) {
     // TODO(flackr): This warning is actually a signal that things are working
     // as expected. As per http://crbug.com/126217, this will help determine
     // if the problem is with dbus or in chrome.
     LOG(WARNING) << "LockScreen signal received from power manager.";
+    screen_locked_ = true;
     FOR_EACH_OBSERVER(Observer, observers_, LockScreen());
   }
 
   void ScreenUnlockSignalReceived(dbus::Signal* signal) {
+    screen_locked_ = false;
     FOR_EACH_OBSERVER(Observer, observers_, UnlockScreen());
   }
 
   void ScreenUnlockFailedSignalReceived(dbus::Signal* signal) {
     FOR_EACH_OBSERVER(Observer, observers_, UnlockScreenFailed());
   }
 
   void IdleNotifySignalReceived(dbus::Signal* signal) {
     dbus::MessageReader reader(signal);
     int64 threshold = 0;
@@ skipping 41 matching lines @@
         break;
       default:
         LOG(ERROR) << "Unhandled screen dimming state " << signal_state;
     }
     FOR_EACH_OBSERVER(Observer, observers_, ScreenDimmingRequested(state));
   }
 
   dbus::ObjectProxy* power_manager_proxy_;
   dbus::ObjectProxy* session_manager_proxy_;
   ObserverList<Observer> observers_;
+  bool screen_locked_;
   base::WeakPtrFactory<PowerManagerClientImpl> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(PowerManagerClientImpl);
 };
 
 // The PowerManagerClient implementation used on Linux desktop,
 // which does nothing.
 class PowerManagerClientStubImpl : public PowerManagerClient {
  public:
   PowerManagerClientStubImpl()
       : discharging_(true),
         battery_percentage_(40),
         brightness_(50.0),
-        pause_count_(2) {
+        pause_count_(2),
+        screen_locked_(false) {
   }
 
   virtual ~PowerManagerClientStubImpl() {}
 
   // PowerManagerClient overrides:
 
   virtual void AddObserver(Observer* observer) OVERRIDE {
     observers_.AddObserver(observer);
   }
 
@@ skipping 53 matching lines @@
 
   virtual void RequestIdleNotification(int64 threshold) OVERRIDE {}
   virtual void RequestActiveNotification() OVERRIDE {}
   virtual void RequestPowerStateOverrides(
       uint32 request_id,
       uint32 duration,
       int overrides,
       const PowerStateRequestIdCallback& callback) OVERRIDE {}
 
   virtual void NotifyScreenLockRequested() OVERRIDE {
+    screen_locked_ = true;
     FOR_EACH_OBSERVER(Observer, observers_, LockScreen());
   }
   virtual void NotifyScreenLockCompleted() OVERRIDE {}
   virtual void NotifyScreenUnlockRequested() OVERRIDE {
+    screen_locked_ = false;
     FOR_EACH_OBSERVER(Observer, observers_, UnlockScreen());
   }
-
   virtual void NotifyScreenUnlockCompleted() OVERRIDE {}
+  virtual bool GetIsScreenLocked() OVERRIDE {
+    return screen_locked_;
+  }
 
  private:
   void Update() {
     if (pause_count_ > 0) {
       pause_count_--;
     } else {
       int discharge_amt = battery_percentage_ <= 10 ? 1 : 10;
       battery_percentage_ += (discharging_ ? -discharge_amt : discharge_amt);
       battery_percentage_ = std::min(std::max(battery_percentage_, 0), 100);
       // We pause at 0 and 100% so that it's easier to check those conditions.
@@ skipping 27 matching lines @@
                       BrightnessChanged(brightness_level, user_initiated));
   }
 
   bool discharging_;
   int battery_percentage_;
   double brightness_;
   int pause_count_;
   ObserverList<Observer> observers_;
   base::RepeatingTimer<PowerManagerClientStubImpl> timer_;
   PowerSupplyStatus status_;
+  bool screen_locked_;
 };
 
 PowerManagerClient::PowerManagerClient() {
 }
 
 PowerManagerClient::~PowerManagerClient() {
 }
 
 PowerManagerClient* PowerManagerClient::Create(
     DBusClientImplementationType type,
     dbus::Bus* bus) {
   if (type == REAL_DBUS_CLIENT_IMPLEMENTATION)
     return new PowerManagerClientImpl(bus);
   DCHECK_EQ(STUB_DBUS_CLIENT_IMPLEMENTATION, type);
   return new PowerManagerClientStubImpl();
 }
 
 }  // namespace chromeos