Index: Source/modules/device_orientation/DeviceMotionDispatcher.cpp |
diff --git a/Source/modules/device_orientation/DeviceMotionDispatcher.cpp b/Source/modules/device_orientation/DeviceMotionDispatcher.cpp |
new file mode 100644 |
index 0000000000000000000000000000000000000000..1e0d25fe09f4adc4e8e3d636d43c182c5a505811 |
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+++ b/Source/modules/device_orientation/DeviceMotionDispatcher.cpp |
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+/* |
+ * Copyright (C) 2013 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 "DeviceMotionDispatcher.h" |
+ |
+#include "core/platform/NotImplemented.h" |
+#include "modules/device_orientation/DeviceMotionController.h" |
+#include "modules/device_orientation/DeviceMotionData.h" |
+#include <public/Platform.h> |
+#include <public/WebDeviceMotionData.h> |
+ |
+namespace WebCore { |
+ |
+DeviceMotionDispatcher& DeviceMotionDispatcher::instance() |
+{ |
+ DEFINE_STATIC_LOCAL(DeviceMotionDispatcher, deviceMotionDispatcher, ()); |
+ return deviceMotionDispatcher; |
+} |
+ |
+DeviceMotionDispatcher::DeviceMotionDispatcher() |
+{ |
+} |
+ |
+DeviceMotionDispatcher::~DeviceMotionDispatcher() |
+{ |
+} |
+ |
+void DeviceMotionDispatcher::addController(DeviceMotionController* controller) |
+{ |
+ bool wasEmpty = m_controllers.isEmpty(); |
+ if (!m_controllers.contains(controller)) |
+ m_controllers.append(controller); |
+ if (wasEmpty) |
+ startListening(); |
+} |
+ |
+void DeviceMotionDispatcher::removeController(DeviceMotionController* controller) |
+{ |
+ // Do not actually remove controller from the vector, instead zero them out. |
+ // The zeros are removed after didChangeDeviceMotion has dispatched all events. |
+ // This is to prevent re-entrancy case when a controller is destroyed while in the |
+ // didChangeDeviceMotion method. |
+ size_t index = m_controllers.find(controller); |
+ if (index != notFound) |
+ m_controllers[index] = 0; |
+} |
+ |
+void DeviceMotionDispatcher::startListening() |
+{ |
+ WebKit::Platform::current()->setDeviceMotionListener(this); |
+} |
+ |
+void DeviceMotionDispatcher::stopListening() |
+{ |
+ WebKit::Platform::current()->setDeviceMotionListener(0); |
+} |
+ |
+void DeviceMotionDispatcher::didChangeDeviceMotion(const WebKit::WebDeviceMotionData& motion) |
+{ |
+ m_lastDeviceMotionData = DeviceMotionData::create(motion); |
+ bool needsPurge = false; |
+ for (size_t i = 0; i < m_controllers.size(); ++i) { |
+ if (m_controllers[i]) |
+ m_controllers[i]->didChangeDeviceMotion(m_lastDeviceMotionData.get()); |
+ else |
+ needsPurge = true; |
+ } |
+ |
+ if (needsPurge) |
+ purgeControllers(); |
+} |
+ |
+DeviceMotionData* DeviceMotionDispatcher::latestDeviceMotionData() |
+{ |
+ return m_lastDeviceMotionData.get(); |
+} |
+ |
+void DeviceMotionDispatcher::purgeControllers() |
+{ |
+ size_t i = 0; |
+ while (i < m_controllers.size()) { |
+ if (!m_controllers[i]) { |
+ m_controllers[i] = m_controllers.last(); |
+ m_controllers.removeLast(); |
+ } else |
+ ++i; |
+ } |
+ |
+ if (m_controllers.isEmpty()) |
+ stopListening(); |
+} |
+ |
+} // namespace WebCore |