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[USER32] Fix AppSwitcher (Alt+Tab) (#1296)

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CORE-15653
This commit is contained in:
Katayama Hirofumi MZ 2019-01-23 22:44:11 +09:00 committed by GitHub
parent f2e0de2f31
commit 687eba26f3
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 27 additions and 24 deletions
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51
win32ss/user/user32/controls/appswitch.c
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@ -165,22 +165,9 @@ void CompleteSwitch(BOOL doSwitch)
BOOL CALLBACK EnumerateCallback(HWND window, LPARAM lParam)
{
HICON hIcon;
HWND hwndOwner;
UNREFERENCED_PARAMETER(lParam);
if (!IsWindowVisible(window))
return TRUE;
hwndOwner = GetWindow(window, GW_OWNER);
if (hwndOwner && IsWindowVisible(hwndOwner))
return TRUE;
GetClassNameW(window, windowText, _countof(windowText));
if ((wcscmp(L"Shell_TrayWnd", windowText)==0) ||
(wcscmp(L"Progman", windowText)==0) )
return TRUE;
// First try to get the big icon assigned to the window
hIcon = (HICON)SendMessageW(window, WM_GETICON, ICON_BIG, 0);
if (!hIcon)
@ -221,21 +208,37 @@ BOOL CALLBACK EnumerateCallback(HWND window, LPARAM lParam)
// Function mostly compatible with the normal EnumChildWindows,
// except it lists in Z-Order and it doesn't ensure consistency
// if a window is removed while enumerating
void EnumChildWindowsZOrder(HWND hwnd, WNDENUMPROC callback, LPARAM lParam)
void EnumWindowsZOrder(WNDENUMPROC callback, LPARAM lParam)
{
HWND next = GetTopWindow(hwnd);
while (next != NULL)
HWND hwnd, hwndOwner;
WCHAR szClass[64];
DWORD ExStyle;
for (hwnd = GetTopWindow(NULL); hwnd; hwnd = GetWindow(hwnd, GW_HWNDNEXT))
{
if (!hwnd && !IsWindowVisible(next))
if (!IsWindowVisible(hwnd))
continue;
// check special windows
if (!GetClassNameW(hwnd, szClass, _countof(szClass)) ||
wcscmp(szClass, L"Shell_TrayWnd") == 0 ||
wcscmp(szClass, L"Progman") == 0)
{
// UPDATE: Seek also the owned windows of the hidden top-level window.
EnumChildWindowsZOrder(next, callback, lParam);
continue;
}
if (!callback(next, lParam))
break;
ExStyle = GetWindowLongPtrW(hwnd, GWL_EXSTYLE);
if (ExStyle & WS_EX_TOOLWINDOW)
continue;
next = GetWindow(next, GW_HWNDNEXT);
hwndOwner = GetWindow(hwnd, GW_OWNER);
if ((ExStyle & WS_EX_APPWINDOW) || !IsWindowVisible(hwndOwner))
{
if (!callback(hwnd, lParam))
break;
continue;
}
}
}
@ -422,7 +425,7 @@ BOOL ProcessHotKey(VOID)
if (!isOpen)
{
windowCount=0;
EnumChildWindowsZOrder(NULL, EnumerateCallback, 0);
EnumWindowsZOrder(EnumerateCallback, 0);
if (windowCount == 0)
return FALSE;
@ -567,7 +570,7 @@ LRESULT WINAPI DoAppSwitch( WPARAM wParam, LPARAM lParam )
Esc = TRUE;
windowCount = 0;
EnumChildWindowsZOrder(NULL, EnumerateCallback, 0);
EnumWindowsZOrder(EnumerateCallback, 0);
if (windowCount < 2)
return 0;