[Bug 31157] Filemaker Pro 12 Trial crashes when opening a sample solution ('ImmAssociateContext' should only generate 'WM_IME_SETCONTEXT' if window has focus)

https://bugs.winehq.org/show_bug.cgi?id=31157

Anastasius Focht  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|-unknown                    |imm32
            Summary|Filemaker Pro 12 Trial      |Filemaker Pro 12 Trial
                   |crashes when opening a      |crashes when opening a
                   |sample solution             |sample solution
                   |                            |('ImmAssociateContext'
                   |                            |should only generate
                   |                            |'WM_IME_SETCONTEXT' if
                   |                            |window has focus)

--- Comment #7 from Anastasius Focht  ---
Hello folks,

it seems the app's message handler doesn't like/expect 'WM_IME_SETCONTEXT'
message during 'ImmAssociateContext' hence crash in some nested app code.

MSDN: http://msdn.microsoft.com/en-us/library/cc194857.aspx

--- quote ---
To create an input context, call ImmCreateContext. To associate this context
with a window, call ImmAssociateContext. After you have associated an input
context with a window, the system will automatically provide the input context
whenever the window gets the focus. The system generates a WM_IME_SETCONTEXT
message; the input context is contained in the lParam. If you make changes to
the input context, you should call ImmNotifyIME so that the IME can remain
synchronized. To destroy the custom input context before you terminate your
application, you must call ImmDestroyContext.
--- quote ---

The key here is: who has the focus.
The window doesn't have the focus at the point of associating the context hence
it doesn't seem correct to unconditionally send 'WM_IME_SETCONTEXT' message.

Source:
http://source.winehq.org/git/wine.git/blob/f0de67de0cab3e67364d699850d86325d...

--- snip ---
475 HIMC WINAPI ImmAssociateContext(HWND hWnd, HIMC hIMC)
476 {
...
519     if (!hIMC)
520         return old;
521
522     if (IsWindow(data->IMC.hWnd))
523     {
524         /*
525          * Post a message that your context is switching
526          */
527         SendMessageW(data->IMC.hWnd, WM_IME_SETCONTEXT, FALSE,
ISC_SHOWUIALL);
528     }
529
530     data->IMC.hWnd = hWnd;
531
532     if (IsWindow(data->IMC.hWnd))
533     {
534         /*
535          * Post a message that your context is switching
536          */
537         SendMessageW(data->IMC.hWnd, WM_IME_SETCONTEXT, TRUE,
ISC_SHOWUIALL);
538     }
539
540     return old;
541 }
--- snip ---

I modified the code to only send 'WM_IME_SETCONTEXT' if focused window == hWnd
and it helped.
The app doesn't crash and all templates/examples are loaded successfully.

Regards