Index: content/browser/battery_status/battery_status_message_filter.cc |
diff --git a/content/browser/battery_status/battery_status_message_filter.cc b/content/browser/battery_status/battery_status_message_filter.cc |
new file mode 100644 |
index 0000000000000000000000000000000000000000..97c909115a725685e3164889949a29deec971a40 |
--- /dev/null |
+++ b/content/browser/battery_status/battery_status_message_filter.cc |
@@ -0,0 +1,94 @@ |
+// 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 "content/browser/battery_status/battery_status_message_filter.h" |
+ |
+#include "base/bind.h" |
+#include "base/bind_helpers.h" |
+#include "content/browser/battery_status/battery_status_provider_impl.h" |
+#include "content/common/battery_status_messages.h" |
+#include "content/public/browser/power_supply_status.h" |
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebBatteryStatus.h" |
+ |
+namespace content { |
+ |
+class BatteryStatusMessageFilter::PowerManagerObserver : |
+ public BatteryStatusProviderImpl::Observer { |
+ public: |
+ explicit PowerManagerObserver(BatteryStatusMessageFilter* filter) |
+ : filter_(filter) { |
+ BatteryStatusProviderImpl::GetInstance()->AddObserver(this); |
+ } |
+ |
+ virtual ~PowerManagerObserver() { |
+ BatteryStatusProviderImpl::GetInstance()->RemoveObserver(this); |
+ } |
+ |
+ void DestroyOnUI() { |
+ filter_ = NULL; |
+ BrowserThread::DeleteOnUIThread::Destruct(this); |
+ } |
+ |
+ private: |
+ virtual void PowerChanged( |
+ const PowerSupplyStatus& power_status) OVERRIDE { |
+ if (filter_) |
+ filter_->SendUpdates(power_status); |
+ } |
+ |
+ BatteryStatusMessageFilter* filter_; |
+ |
+ DISALLOW_COPY_AND_ASSIGN(PowerManagerObserver); |
+}; |
+ |
+BatteryStatusMessageFilter::BatteryStatusMessageFilter() { |
+} |
+ |
+void BatteryStatusMessageFilter::SendUpdates( |
+ const PowerSupplyStatus& power_status) { |
+ WebKit::WebBatteryStatus web_status; |
+ web_status.charging = power_status.line_power_on; |
+ web_status.chargingTime = power_status.battery_seconds_to_full; |
+ web_status.dischargingTime = power_status.battery_seconds_to_empty; |
+ web_status.level = power_status.battery_percentage / 100.; |
+ |
+ Send(new BatteryStatusMsg_Updated(web_status)); |
+} |
+ |
+BatteryStatusMessageFilter::~BatteryStatusMessageFilter() { |
+ if (observer_.get()) { |
+ // This destructor is in the IO thread. But we need to destroy the observer |
+ // in the UI thread. |
+ observer_.release()->DestroyOnUI(); |
+ } |
+} |
+ |
+void BatteryStatusMessageFilter::OnStartUpdating() { |
+ if (!observer_.get()) |
+ observer_.reset(new PowerManagerObserver(this)); |
+} |
+ |
+void BatteryStatusMessageFilter::OnStopUpdating() { |
+ observer_.reset(); |
+} |
+ |
+void BatteryStatusMessageFilter::OverrideThreadForMessage( |
+ const IPC::Message& message, |
+ BrowserThread::ID* thread) { |
+ if (IPC_MESSAGE_CLASS(message) == BatteryStatusMsgStart) |
+ *thread = BrowserThread::UI; |
+} |
+ |
+bool BatteryStatusMessageFilter::OnMessageReceived(const IPC::Message& message, |
+ bool* message_was_ok) { |
+ bool handled = true; |
+ IPC_BEGIN_MESSAGE_MAP_EX(BatteryStatusMessageFilter, message, *message_was_ok) |
+ IPC_MESSAGE_HANDLER(BatteryStatusHostMsg_StartUpdating, OnStartUpdating) |
+ IPC_MESSAGE_HANDLER(BatteryStatusHostMsg_StopUpdating, OnStopUpdating) |
+ IPC_MESSAGE_UNHANDLED(handled = false) |
+ IPC_END_MESSAGE_MAP_EX() |
+ return handled; |
+} |
+ |
+} // namespace content |