| // Copyright (c) 2006-2008 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 "base/idle_timer.h" |
| |
| // We may not want to port idle_timer to Linux, but we have implemented it |
| // anyway. Define this to 1 to enable the Linux idle timer and then add the |
| // libs that need to be linked (Xss). |
| #define ENABLE_XSS_SUPPORT 0 |
| |
| #if defined(OS_MACOSX) |
| #include <ApplicationServices/ApplicationServices.h> |
| #endif |
| |
| #if defined(OS_LINUX) && ENABLE_XSS_SUPPORT |
| // We may not want to port idle_timer to Linux, but we have implemented it |
| // anyway. Remove the 0 above if we want it. |
| #include <gdk/gdkx.h> |
| #include <X11/extensions/scrnsaver.h> |
| #include "base/lazy_instance.h" |
| #include "base/thread_local.h" |
| #endif |
| |
| #include "base/message_loop.h" |
| #include "base/time.h" |
| |
| namespace base { |
| |
| #if defined(OS_WIN) |
| bool OSIdleTimeSource(int32 *milliseconds_interval_since_last_event) { |
| LASTINPUTINFO lastInputInfo; |
| lastInputInfo.cbSize = sizeof(lastInputInfo); |
| if (GetLastInputInfo(&lastInputInfo) == 0) { |
| return false; |
| } |
| int32 last_input_time = lastInputInfo.dwTime; |
| |
| // Note: On Windows GetLastInputInfo returns a 32bit value which rolls over |
| // ~49days. |
| int32 current_time = GetTickCount(); |
| int32 delta = current_time - last_input_time; |
| // delta will go negative if we've been idle for 2GB of ticks. |
| if (delta < 0) |
| delta = -delta; |
| *milliseconds_interval_since_last_event = delta; |
| return true; |
| } |
| #elif defined(OS_MACOSX) |
| bool OSIdleTimeSource(int32 *milliseconds_interval_since_last_event) { |
| *milliseconds_interval_since_last_event = |
| CGEventSourceSecondsSinceLastEventType( |
| kCGEventSourceStateCombinedSessionState, |
| kCGAnyInputEventType) * 1000.0; |
| return true; |
| } |
| #elif defined(OS_LINUX) && ENABLE_XSS_SUPPORT |
| class IdleState { |
| public: |
| IdleState() { |
| int event_base, error_base; |
| have_idle_info_ = XScreenSaverQueryExtension(GDK_DISPLAY(), &event_base, |
| &error_base); |
| if (have_idle_info_) |
| idle_info_.Set(XScreenSaverAllocInfo()); |
| } |
| |
| ~IdleState() { |
| if (idle_info_.Get()) { |
| XFree(idle_info_.Get()); |
| idle_info_.~ThreadLocalPointer(); |
| } |
| } |
| |
| int32 IdleTime() { |
| if (have_idle_info_ && idle_info_.Get()) { |
| XScreenSaverQueryInfo(GDK_DISPLAY(), GDK_ROOT_WINDOW(), |
| idle_info_.Get()); |
| return idle_info_.Get()->idle; |
| } |
| return -1; |
| } |
| |
| private: |
| bool have_idle_info_; |
| ThreadLocalPointer<XScreenSaverInfo> idle_info_; |
| |
| DISALLOW_COPY_AND_ASSIGN(IdleState); |
| }; |
| |
| bool OSIdleTimeSource(int32* milliseconds_interval_since_last_event) { |
| static LazyInstance<IdleState> state_instance(base::LINKER_INITIALIZED); |
| IdleState* state = state_instance.Pointer(); |
| int32 idle_time = state->IdleTime(); |
| if (0 < idle_time) { |
| *milliseconds_interval_since_last_event = idle_time; |
| return true; |
| } |
| return false; |
| } |
| #endif |
| |
| IdleTimer::IdleTimer(TimeDelta idle_time, bool repeat) |
| : idle_interval_(idle_time), |
| repeat_(repeat), |
| idle_time_source_(OSIdleTimeSource) { |
| DCHECK_EQ(MessageLoop::TYPE_UI, MessageLoop::current()->type()) << |
| "Requires a thread that processes Windows UI events"; |
| } |
| |
| IdleTimer::~IdleTimer() { |
| Stop(); |
| } |
| |
| void IdleTimer::Start() { |
| StartTimer(); |
| } |
| |
| void IdleTimer::Stop() { |
| timer_.Stop(); |
| } |
| |
| void IdleTimer::Run() { |
| // Verify we can fire the idle timer. |
| if (TimeUntilIdle().InMilliseconds() <= 0) { |
| OnIdle(); |
| last_time_fired_ = Time::Now(); |
| } |
| Stop(); |
| StartTimer(); // Restart the timer for next run. |
| } |
| |
| void IdleTimer::StartTimer() { |
| DCHECK(!timer_.IsRunning()); |
| TimeDelta delay = TimeUntilIdle(); |
| if (delay.InMilliseconds() < 0) |
| delay = TimeDelta(); |
| timer_.Start(delay, this, &IdleTimer::Run); |
| } |
| |
| TimeDelta IdleTimer::CurrentIdleTime() { |
| int32 interval = 0; |
| if (idle_time_source_(&interval)) { |
| return TimeDelta::FromMilliseconds(interval); |
| } |
| NOTREACHED(); |
| return TimeDelta::FromMilliseconds(0); |
| } |
| |
| TimeDelta IdleTimer::TimeUntilIdle() { |
| TimeDelta time_since_last_fire = Time::Now() - last_time_fired_; |
| TimeDelta current_idle_time = CurrentIdleTime(); |
| if (current_idle_time > time_since_last_fire) { |
| if (repeat_) |
| return idle_interval_ - time_since_last_fire; |
| return idle_interval_; |
| } |
| return idle_interval_ - current_idle_time; |
| } |
| |
| } // namespace base |