Replace WTF::move with WTFMove
[WebKit-https.git] / Source / WebCore / platform / win / WindowMessageBroadcaster.cpp
1 /*
2  * Copyright (C) 2007, 2014 Apple Inc. All rights reserved.
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  *
8  * 1.  Redistributions of source code must retain the above copyright
9  *     notice, this list of conditions and the following disclaimer.
10  * 2.  Redistributions in binary form must reproduce the above copyright
11  *     notice, this list of conditions and the following disclaimer in the
12  *     documentation and/or other materials provided with the distribution.
13  * 3.  Neither the name of Apple Inc. ("Apple") nor the names of
14  *     its contributors may be used to endorse or promote products derived
15  *     from this software without specific prior written permission.
16  *
17  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
18  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
19  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
20  * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
21  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
22  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
23  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
24  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27  */
28
29 #include "config.h"
30 #include "WindowMessageBroadcaster.h"
31
32 #include "WindowMessageListener.h"
33
34 namespace WebCore {
35
36 typedef HashMap<HWND, WindowMessageBroadcaster*> InstanceMap;
37
38 static InstanceMap& instancesMap()
39 {
40     static InstanceMap instances;
41     return instances;
42 }
43
44 void WindowMessageBroadcaster::addListener(HWND hwnd, WindowMessageListener* listener)
45 {
46     WindowMessageBroadcaster* broadcaster = instancesMap().get(hwnd);
47     if (!broadcaster) {
48         broadcaster = new WindowMessageBroadcaster(hwnd);
49         instancesMap().add(hwnd, broadcaster);
50     }
51
52     broadcaster->addListener(listener);
53 }
54
55 void WindowMessageBroadcaster::removeListener(HWND hwnd, WindowMessageListener* listener)
56 {
57     WindowMessageBroadcaster* broadcaster = instancesMap().get(hwnd);
58     if (!broadcaster)
59         return;
60
61     broadcaster->removeListener(listener);
62 }
63
64 WindowMessageBroadcaster::WindowMessageBroadcaster(HWND hwnd)
65     : m_subclassedWindow(hwnd)
66     , m_originalWndProc(0)
67 {
68     ASSERT_ARG(hwnd, IsWindow(hwnd));
69 }
70
71 WindowMessageBroadcaster::~WindowMessageBroadcaster()
72 {
73 }
74
75 void WindowMessageBroadcaster::addListener(WindowMessageListener* listener)
76 {
77     if (m_listeners.isEmpty()) {
78         ASSERT(!m_originalWndProc);
79 #pragma warning(disable: 4244 4312)
80         m_originalWndProc = reinterpret_cast<WNDPROC>(SetWindowLongPtr(m_subclassedWindow, GWLP_WNDPROC, reinterpret_cast<LONG_PTR>(SubclassedWndProc)));
81     }
82     ASSERT(m_originalWndProc);
83
84     m_listeners.add(listener);
85 }
86
87 void WindowMessageBroadcaster::removeListener(WindowMessageListener* listener)
88 {
89     m_listeners.remove(listener);
90     if (m_listeners.isEmpty())
91         destroy();
92 }
93
94 void WindowMessageBroadcaster::destroy()
95 {
96     m_listeners.clear();
97     unsubclassWindow();
98     instancesMap().remove(m_subclassedWindow);
99     delete this;
100 }
101
102 void WindowMessageBroadcaster::unsubclassWindow()
103 {
104     SetWindowLongPtr(m_subclassedWindow, GWLP_WNDPROC, reinterpret_cast<LONG_PTR>(m_originalWndProc));
105     m_originalWndProc = 0;
106 }
107
108 LRESULT CALLBACK WindowMessageBroadcaster::SubclassedWndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
109 {
110     WindowMessageBroadcaster* broadcaster = instancesMap().get(hwnd);
111     ASSERT(broadcaster);
112     if (!broadcaster)
113         return 0;
114
115     ListenerSet::const_iterator end = broadcaster->listeners().end();
116     for (ListenerSet::const_iterator it = broadcaster->listeners().begin(); it != end; ++it)
117         (*it)->windowReceivedMessage(hwnd, message, wParam, lParam);
118
119     WNDPROC originalWndProc = broadcaster->originalWndProc();
120
121     // This will delete broadcaster.
122     if (message == WM_DESTROY)
123         broadcaster->destroy();
124
125     return CallWindowProc(originalWndProc, hwnd, message, wParam, lParam);
126 }
127
128 } // namespace WebCore