Index: Source/core/frame/DeviceEventControllerBase.cpp |
diff --git a/Source/core/frame/DeviceEventControllerBase.cpp b/Source/core/frame/DeviceEventControllerBase.cpp |
new file mode 100644 |
index 0000000000000000000000000000000000000000..5df24451c7f92368da36ca91d5d721ebe6bded29 |
--- /dev/null |
+++ b/Source/core/frame/DeviceEventControllerBase.cpp |
@@ -0,0 +1,96 @@ |
+/* |
+ * Copyright (C) 2014 Google Inc. All rights reserved. |
+ * |
+ * Redistribution and use in source and binary forms, with or without |
+ * modification, are permitted provided that the following conditions are |
+ * met: |
+ * |
+ * * Redistributions of source code must retain the above copyright |
+ * notice, this list of conditions and the following disclaimer. |
+ * * Redistributions in binary form must reproduce the above |
+ * copyright notice, this list of conditions and the following disclaimer |
+ * in the documentation and/or other materials provided with the |
+ * distribution. |
+ * * Neither the name of Google Inc. nor the names of its |
+ * contributors may be used to endorse or promote products derived from |
+ * this software without specific prior written permission. |
+ * |
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
+ */ |
+ |
+#include "config.h" |
+#include "core/frame/DeviceEventControllerBase.h" |
+ |
+#include "core/page/Page.h" |
+ |
+namespace WebCore { |
+ |
+DeviceEventControllerBase::DeviceEventControllerBase(Page* page) |
+ : PageLifecycleObserver(page) |
+ , m_hasEventListener(false) |
+ , m_isActive(false) |
+ , m_timer(this, &DeviceEventControllerBase::oneShotCallback) |
+{ |
+} |
+ |
+DeviceEventControllerBase::~DeviceEventControllerBase() |
+{ |
+} |
+ |
+void DeviceEventControllerBase::oneShotCallback(Timer<DeviceEventControllerBase>* timer) |
+{ |
+ ASSERT_UNUSED(timer, timer == &m_timer); |
+ ASSERT(isInvokeInitialUpdate()); |
+ |
+ m_timer.stop(); |
Inactive
2014/06/03 13:49:33
Why do we need to stop the timer? It is one-shot.
timvolodine
2014/06/03 18:45:54
yeah right it's one shot. added an "non-active" as
|
+ didUpdateData(); |
+} |
+ |
+void DeviceEventControllerBase::startUpdating() |
+{ |
+ if (m_isActive) |
+ return; |
+ |
+ if (isInvokeInitialUpdate() && !m_timer.isActive()) { |
+ // Make sure to fire the data as soon as possible. |
+ m_timer.startOneShot(0, FROM_HERE); |
+ } |
+ |
+ registerWithDispatcher(); |
+ m_isActive = true; |
+} |
+ |
+void DeviceEventControllerBase::stopUpdating() |
+{ |
+ if (!m_isActive) |
+ return; |
+ |
+ if (m_timer.isActive()) |
+ m_timer.stop(); |
+ |
+ unregisterWithDispatcher(); |
+ m_isActive = false; |
+} |
+ |
+void DeviceEventControllerBase::pageVisibilityChanged() |
+{ |
+ if (!m_hasEventListener) |
+ return; |
+ |
+ if (page()->visibilityState() == PageVisibilityStateVisible) |
+ startUpdating(); |
+ else |
+ stopUpdating(); |
+} |
+ |
+} // namespace WebCore |