1 /*
2 * Copyright 2010, The Android Open Source Project
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * * Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * * Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26 #include "config.h"
27 #include "DeviceOrientationController.h"
28
29 #include "DeviceOrientation.h"
30 #include "DeviceOrientationClient.h"
31 #include "DeviceOrientationEvent.h"
32
33 namespace WebCore {
34
DeviceOrientationController(Page * page,DeviceOrientationClient * client)35 DeviceOrientationController::DeviceOrientationController(Page* page, DeviceOrientationClient* client)
36 : m_page(page)
37 , m_client(client)
38 , m_timer(this, &DeviceOrientationController::timerFired)
39 {
40 ASSERT(m_client);
41 m_client->setController(this);
42 }
43
~DeviceOrientationController()44 DeviceOrientationController::~DeviceOrientationController()
45 {
46 m_client->deviceOrientationControllerDestroyed();
47 }
48
timerFired(Timer<DeviceOrientationController> * timer)49 void DeviceOrientationController::timerFired(Timer<DeviceOrientationController>* timer)
50 {
51 ASSERT_UNUSED(timer, timer == &m_timer);
52 ASSERT(m_client->lastOrientation());
53
54 RefPtr<DeviceOrientation> orientation = m_client->lastOrientation();
55 RefPtr<DeviceOrientationEvent> event = DeviceOrientationEvent::create(eventNames().deviceorientationEvent, orientation.get());
56
57 Vector<RefPtr<DOMWindow> > listenersVector;
58 copyToVector(m_newListeners, listenersVector);
59 m_newListeners.clear();
60 for (size_t i = 0; i < listenersVector.size(); ++i)
61 listenersVector[i]->dispatchEvent(event);
62 }
63
addListener(DOMWindow * window)64 void DeviceOrientationController::addListener(DOMWindow* window)
65 {
66 // If the client already has an orientation, we should fire an event with that
67 // orientation. The event is fired asynchronously, but without
68 // waiting for the client to get a new orientation.
69 if (m_client->lastOrientation()) {
70 m_newListeners.add(window);
71 if (!m_timer.isActive())
72 m_timer.startOneShot(0);
73 }
74
75 // The client must not call back synchronously.
76 bool wasEmpty = m_listeners.isEmpty();
77 m_listeners.add(window);
78 if (wasEmpty)
79 m_client->startUpdating();
80 }
81
removeListener(DOMWindow * window)82 void DeviceOrientationController::removeListener(DOMWindow* window)
83 {
84 m_listeners.remove(window);
85 m_newListeners.remove(window);
86 if (m_listeners.isEmpty())
87 m_client->stopUpdating();
88 }
89
removeAllListeners(DOMWindow * window)90 void DeviceOrientationController::removeAllListeners(DOMWindow* window)
91 {
92 // May be called with a DOMWindow that's not a listener.
93 if (!m_listeners.contains(window))
94 return;
95
96 m_listeners.removeAll(window);
97 m_newListeners.remove(window);
98 if (m_listeners.isEmpty())
99 m_client->stopUpdating();
100 }
101
didChangeDeviceOrientation(DeviceOrientation * orientation)102 void DeviceOrientationController::didChangeDeviceOrientation(DeviceOrientation* orientation)
103 {
104 RefPtr<DeviceOrientationEvent> event = DeviceOrientationEvent::create(eventNames().deviceorientationEvent, orientation);
105 Vector<RefPtr<DOMWindow> > listenersVector;
106 copyToVector(m_listeners, listenersVector);
107 for (size_t i = 0; i < listenersVector.size(); ++i)
108 listenersVector[i]->dispatchEvent(event);
109 }
110
111 } // namespace WebCore
112