1 /*
2 * Copyright 2004 The WebRTC Project Authors. All rights reserved.
3 *
4 * Use of this source code is governed by a BSD-style license
5 * that can be found in the LICENSE file in the root of the source
6 * tree. An additional intellectual property rights grant can be found
7 * in the file PATENTS. All contributing project authors may
8 * be found in the AUTHORS file in the root of the source tree.
9 */
10
11 #include "webrtc/base/common.h"
12 #include "webrtc/base/logging.h"
13 #include "webrtc/base/win32window.h"
14
15 namespace rtc {
16
17 ///////////////////////////////////////////////////////////////////////////////
18 // Win32Window
19 ///////////////////////////////////////////////////////////////////////////////
20
21 static const wchar_t kWindowBaseClassName[] = L"WindowBaseClass";
22 HINSTANCE Win32Window::instance_ = NULL;
23 ATOM Win32Window::window_class_ = 0;
24
Win32Window()25 Win32Window::Win32Window() : wnd_(NULL) {
26 }
27
~Win32Window()28 Win32Window::~Win32Window() {
29 ASSERT(NULL == wnd_);
30 }
31
Create(HWND parent,const wchar_t * title,DWORD style,DWORD exstyle,int x,int y,int cx,int cy)32 bool Win32Window::Create(HWND parent, const wchar_t* title, DWORD style,
33 DWORD exstyle, int x, int y, int cx, int cy) {
34 if (wnd_) {
35 // Window already exists.
36 return false;
37 }
38
39 if (!window_class_) {
40 if (!GetModuleHandleEx(GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS |
41 GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT,
42 reinterpret_cast<LPCWSTR>(&Win32Window::WndProc),
43 &instance_)) {
44 LOG_GLE(LS_ERROR) << "GetModuleHandleEx failed";
45 return false;
46 }
47
48 // Class not registered, register it.
49 WNDCLASSEX wcex;
50 memset(&wcex, 0, sizeof(wcex));
51 wcex.cbSize = sizeof(wcex);
52 wcex.hInstance = instance_;
53 wcex.lpfnWndProc = &Win32Window::WndProc;
54 wcex.lpszClassName = kWindowBaseClassName;
55 window_class_ = ::RegisterClassEx(&wcex);
56 if (!window_class_) {
57 LOG_GLE(LS_ERROR) << "RegisterClassEx failed";
58 return false;
59 }
60 }
61 wnd_ = ::CreateWindowEx(exstyle, kWindowBaseClassName, title, style,
62 x, y, cx, cy, parent, NULL, instance_, this);
63 return (NULL != wnd_);
64 }
65
Destroy()66 void Win32Window::Destroy() {
67 VERIFY(::DestroyWindow(wnd_) != FALSE);
68 }
69
Shutdown()70 void Win32Window::Shutdown() {
71 if (window_class_) {
72 ::UnregisterClass(MAKEINTATOM(window_class_), instance_);
73 window_class_ = 0;
74 }
75 }
76
OnMessage(UINT uMsg,WPARAM wParam,LPARAM lParam,LRESULT & result)77 bool Win32Window::OnMessage(UINT uMsg, WPARAM wParam, LPARAM lParam,
78 LRESULT& result) {
79 switch (uMsg) {
80 case WM_CLOSE:
81 if (!OnClose()) {
82 result = 0;
83 return true;
84 }
85 break;
86 }
87 return false;
88 }
89
WndProc(HWND hwnd,UINT uMsg,WPARAM wParam,LPARAM lParam)90 LRESULT Win32Window::WndProc(HWND hwnd, UINT uMsg,
91 WPARAM wParam, LPARAM lParam) {
92 Win32Window* that = reinterpret_cast<Win32Window*>(
93 ::GetWindowLongPtr(hwnd, GWLP_USERDATA));
94 if (!that && (WM_CREATE == uMsg)) {
95 CREATESTRUCT* cs = reinterpret_cast<CREATESTRUCT*>(lParam);
96 that = static_cast<Win32Window*>(cs->lpCreateParams);
97 that->wnd_ = hwnd;
98 ::SetWindowLongPtr(hwnd, GWLP_USERDATA, reinterpret_cast<LONG_PTR>(that));
99 }
100 if (that) {
101 LRESULT result;
102 bool handled = that->OnMessage(uMsg, wParam, lParam, result);
103 if (WM_DESTROY == uMsg) {
104 for (HWND child = ::GetWindow(hwnd, GW_CHILD); child;
105 child = ::GetWindow(child, GW_HWNDNEXT)) {
106 LOG(LS_INFO) << "Child window: " << static_cast<void*>(child);
107 }
108 }
109 if (WM_NCDESTROY == uMsg) {
110 ::SetWindowLongPtr(hwnd, GWLP_USERDATA, NULL);
111 that->wnd_ = NULL;
112 that->OnNcDestroy();
113 }
114 if (handled) {
115 return result;
116 }
117 }
118 return ::DefWindowProc(hwnd, uMsg, wParam, lParam);
119 }
120
121 } // namespace rtc
122