Implement DeviceLight

Source/modules/devicelight/DeviceLightDispatcher.cpp

+/*
+ * Copyright (C) 2014 Intel 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``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 "modules/devicelight/DeviceLightDispatcher.h"
+
+#include "modules/device_orientation/DeviceSensorEventDispatcher.h"
+#include "modules/devicelight/DeviceLightController.h"
+#include "public/platform/Platform.h"
+#include "wtf/TemporaryChange.h"
+
+namespace WebCore {
+
+DeviceLightDispatcher& DeviceLightDispatcher::instance()
+{
+    DEFINE_STATIC_LOCAL(DeviceLightDispatcher, deviceLightDispatcher, ());
+    return deviceLightDispatcher;
+}
+
+DeviceLightDispatcher::DeviceLightDispatcher()
+{
+}
+
+DeviceLightDispatcher::~DeviceLightDispatcher()
+{
+}
+
+
+void DeviceLightDispatcher::addDeviceLightController(DeviceLightController* controller)
+{
+    addController(controller);
+}
+
+void DeviceLightDispatcher::removeDeviceLightController(DeviceLightController* controller)
+{
+    removeController(controller);
+}
+
+void DeviceLightDispatcher::startListening()
+{
+    blink::Platform::current()->setDeviceLightListener(this);
+}
+
+void DeviceLightDispatcher::stopListening()
+{
+    blink::Platform::current()->setDeviceLightListener(0);
+}
+
+void DeviceLightDispatcher::didChangeDeviceLight(const double& value)
+{
+    m_lastDeviceLightData = value;
+
+    {
+        TemporaryChange<bool> changeIsDispatching(m_isDispatching, true);
+        // Don't fire controllers removed or added during event dispatch.
+        size_t size = m_controllers.size();
+        for (size_t i = 0; i < size; ++i) {
+            if (m_controllers[i])
+                static_cast<DeviceLightController*>(m_controllers[i])->didChangeDeviceLight(m_lastDeviceLightData);
+        }
+    }
+
+    if (m_needsPurge)
+        purgeControllers();
+}
+
+double DeviceLightDispatcher::latestDeviceLightData()
+{
+    return m_lastDeviceLightData;
+}
+
+} // namespace WebCore