When activating a window and sending activation messages to the window procedure, we have to avoid a recursive loop by not sending more of these messages or hooks while we are still activating the window. Some applications actually depend on this behavior.
Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=46274 Signed-off-by: Gabriel Ivăncescu gabrielopcode@gmail.com ---
Can someone please take a look at these patches and provide feedback if possible? The behavior is very consistent and the tests are pretty much reliable as far as I can see, so it is indeed Windows' behavior on which apps do rely on (since it fixes an annoying issue in Total Commander's Multi-rename function).
I understand it touches a sensitive part of Wine, but I think the tests are pretty conclusive. If not, I'd like some feedback on how to solve it better.
Of course, I've been running with this patch for some months now and didn't find anything wrong with focus.
dlls/user32/focus.c | 44 +++++++++++++++++++++++++++++--------------- dlls/user32/win.h | 1 + 2 files changed, 30 insertions(+), 15 deletions(-)
diff --git a/dlls/user32/focus.c b/dlls/user32/focus.c index f1c8831..0d32d00 100644 --- a/dlls/user32/focus.c +++ b/dlls/user32/focus.c @@ -78,7 +78,7 @@ static BOOL set_active_window( HWND hwnd, HWND *prev, BOOL mouse, BOOL focus ) { HWND previous = GetActiveWindow(); BOOL ret; - DWORD old_thread, new_thread; + DWORD winflags, old_thread, new_thread; CBTACTIVATESTRUCT cbt;
if (previous == hwnd) @@ -87,16 +87,24 @@ static BOOL set_active_window( HWND hwnd, HWND *prev, BOOL mouse, BOOL focus ) return TRUE; }
- /* call CBT hook chain */ - cbt.fMouse = mouse; - cbt.hWndActive = previous; - if (HOOK_CallHooks( WH_CBT, HCBT_ACTIVATE, (WPARAM)hwnd, (LPARAM)&cbt, TRUE )) return FALSE; - - if (IsWindow(previous)) + /* Prevent a recursive activation loop with the activation messages */ + winflags = win_set_flags(hwnd, WIN_IS_IN_ACTIVATION, 0); + if (!(winflags & WIN_IS_IN_ACTIVATION)) { - SendMessageW( previous, WM_NCACTIVATE, FALSE, (LPARAM)hwnd ); - SendMessageW( previous, WM_ACTIVATE, - MAKEWPARAM( WA_INACTIVE, IsIconic(previous) ), (LPARAM)hwnd ); + ret = FALSE; + + /* call CBT hook chain */ + cbt.fMouse = mouse; + cbt.hWndActive = previous; + if (HOOK_CallHooks( WH_CBT, HCBT_ACTIVATE, (WPARAM)hwnd, (LPARAM)&cbt, TRUE )) + goto clear_flags; + + if (IsWindow(previous)) + { + SendMessageW( previous, WM_NCACTIVATE, FALSE, (LPARAM)hwnd ); + SendMessageW( previous, WM_ACTIVATE, + MAKEWPARAM( WA_INACTIVE, IsIconic(previous) ), (LPARAM)hwnd ); + } }
SERVER_START_REQ( set_active_window ) @@ -106,9 +114,9 @@ static BOOL set_active_window( HWND hwnd, HWND *prev, BOOL mouse, BOOL focus ) previous = wine_server_ptr_handle( reply->previous ); } SERVER_END_REQ; - if (!ret) return FALSE; + if (!ret) goto clear_flags; if (prev) *prev = previous; - if (previous == hwnd) return TRUE; + if (previous == hwnd) goto clear_flags;
if (hwnd) { @@ -116,7 +124,11 @@ static BOOL set_active_window( HWND hwnd, HWND *prev, BOOL mouse, BOOL focus ) if (SendMessageW( hwnd, WM_QUERYNEWPALETTE, 0, 0 )) SendMessageTimeoutW( HWND_BROADCAST, WM_PALETTEISCHANGING, (WPARAM)hwnd, 0, SMTO_ABORTIFHUNG, 2000, NULL ); - if (!IsWindow(hwnd)) return FALSE; + if (!IsWindow(hwnd)) + { + ret = FALSE; + goto clear_flags; + } }
old_thread = previous ? GetWindowThreadProcessId( previous, NULL ) : 0; @@ -148,7 +160,7 @@ static BOOL set_active_window( HWND hwnd, HWND *prev, BOOL mouse, BOOL focus ) } }
- if (IsWindow(hwnd)) + if (!(winflags & WIN_IS_IN_ACTIVATION) && IsWindow(hwnd)) { SendMessageW( hwnd, WM_NCACTIVATE, (hwnd == GetForegroundWindow()), (LPARAM)previous ); SendMessageW( hwnd, WM_ACTIVATE, @@ -173,7 +185,9 @@ static BOOL set_active_window( HWND hwnd, HWND *prev, BOOL mouse, BOOL focus ) } }
- return TRUE; +clear_flags: + win_set_flags(hwnd, 0, WIN_IS_IN_ACTIVATION); + return ret; }
diff --git a/dlls/user32/win.h b/dlls/user32/win.h index 81b08fc..d53e1a5 100644 --- a/dlls/user32/win.h +++ b/dlls/user32/win.h @@ -79,6 +79,7 @@ typedef struct tagWND #define WIN_NEEDS_SHOW_OWNEDPOPUP 0x0020 /* WM_SHOWWINDOW:SC_SHOW must be sent in the next ShowOwnedPopup call */ #define WIN_CHILDREN_MOVED 0x0040 /* children may have moved, ignore stored positions */ #define WIN_HAS_IME_WIN 0x0080 /* the window has been registered with imm32 */ +#define WIN_IS_IN_ACTIVATION 0x0100 /* the window is in an activation process */
/* Window functions */ extern HWND get_hwnd_message_parent(void) DECLSPEC_HIDDEN;