[PATCH v2 0/2] MR7024: Disable native titlebar while lacking enough space for SM_CYCAPTION.

[Jactry Zeng (＠jactry)]

On Windows, applications can disable titlebar by extending the client rect to a bigger rect which will cover the area of the titlebar from WM_NCCALCSIZE: https://learn.microsoft.com/en-us/windows/win32/dwm/customframe#removing-the...
Our current x11 and Mac driver doesn't handle this case.

Attached is a test case for reproducing the issue.

[hide_caption.c](/uploads/46a725e32569a6a0a929a0f183cf9ed8/hide_caption.c)

--
  v2: winemac.drv: Disable native titlebar while lacking enough space for SM_CYCAPTION.
      winex11.drv: Disable native titlebar while lacking enough space for SM_CYCAPTION.

https://gitlab.winehq.org/wine/wine/-/merge_requests/7024

[PATCH v2 1/2] winex11.drv: Disable native titlebar while lacking enough space for SM_CYCAPTION.

[Jactry Zeng]

From: Jactry Zeng

---
 dlls/winex11.drv/window.c | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/dlls/winex11.drv/window.c b/dlls/winex11.drv/window.c
index beb93d66251..af876baaf47 100644
--- a/dlls/winex11.drv/window.c
+++ b/dlls/winex11.drv/window.c
@@ -452,7 +452,7 @@ static inline BOOL is_window_resizable( struct x11drv_win_data *data, DWORD styl
 /***********************************************************************
  *              get_mwm_decorations
  */
-static unsigned long get_mwm_decorations_for_style( DWORD style, DWORD ex_style )
+static unsigned long get_mwm_decorations_for_style( struct x11drv_win_data *data, DWORD style, DWORD ex_style )
 {
     unsigned long ret = 0;

@@ -461,6 +461,9 @@ static unsigned long get_mwm_decorations_for_style( DWORD style, DWORD ex_style

if ((style & WS_CAPTION) == WS_CAPTION)
     {
+        if (data && ((data->rects.client.top - data->rects.window.top) < NtUserGetSystemMetrics(SM_CYCAPTION)))
+            return 0;
+
         ret |= MWM_DECOR_TITLE | MWM_DECOR_BORDER;
         if (style & WS_SYSMENU) ret |= MWM_DECOR_MENU;
         if (style & WS_MINIMIZEBOX) ret |= MWM_DECOR_MINIMIZE;
@@ -476,7 +479,7 @@ static unsigned long get_mwm_decorations_for_style( DWORD style, DWORD ex_style
 static unsigned long get_mwm_decorations( struct x11drv_win_data *data, DWORD style, DWORD ex_style )
 {
     if (EqualRect( &data->rects.window, &data->rects.visible )) return 0;
-    return get_mwm_decorations_for_style( style, ex_style );
+    return get_mwm_decorations_for_style( data, style, ex_style );
 }

@@ -3141,10 +3144,13 @@ void X11DRV_MoveWindowBits( HWND hwnd, const struct window_rects *old_rects,
  */
 BOOL X11DRV_GetWindowStyleMasks( HWND hwnd, UINT style, UINT ex_style, UINT *style_mask, UINT *ex_style_mask )
 {
-    unsigned long decor = get_mwm_decorations_for_style( style, ex_style );
     struct x11drv_win_data *data;
+    unsigned long decor;

-    if ((data = get_win_data( hwnd )))
+    data = get_win_data( hwnd );
+    decor = get_mwm_decorations_for_style( data, style, ex_style );
+
+    if (data)
     {
         if (!data->managed) decor = 0;
         release_win_data( data );

[PATCH v2 2/2] winemac.drv: Disable native titlebar while lacking enough space for SM_CYCAPTION.

[Jactry Zeng]

From: Jactry Zeng

---
 dlls/winemac.drv/window.c | 25 +++++++++++++++++--------
 1 file changed, 17 insertions(+), 8 deletions(-)

diff --git a/dlls/winemac.drv/window.c b/dlls/winemac.drv/window.c
index 940fdffa800..8e8ae7daab4 100644
--- a/dlls/winemac.drv/window.c
+++ b/dlls/winemac.drv/window.c
@@ -56,7 +56,7 @@ static BOOL set_window_pos(HWND hwnd, HWND after, INT x, INT y, INT cx, INT cy,
 }

-static struct macdrv_window_features get_window_features_for_style(DWORD style, DWORD ex_style, BOOL shaped)
+static struct macdrv_window_features get_window_features_for_style(struct macdrv_win_data *data, DWORD style, DWORD ex_style, BOOL shaped)
 {
     struct macdrv_window_features wf = {0};

@@ -67,11 +67,16 @@ static struct macdrv_window_features get_window_features_for_style(DWORD style,
         wf.shadow = TRUE;
         if (!shaped)
         {
-            wf.title_bar = TRUE;
-            if (style & WS_SYSMENU) wf.close_button = TRUE;
-            if (style & WS_MINIMIZEBOX) wf.minimize_button = TRUE;
-            if (style & WS_MAXIMIZEBOX) wf.maximize_button = TRUE;
-            if (ex_style & WS_EX_TOOLWINDOW) wf.utility = TRUE;
+            if (data && ((data->rects.client.top - data->rects.window.top) < NtUserGetSystemMetrics(SM_CYCAPTION)))
+                wf.title_bar = FALSE;
+            else
+            {
+                wf.title_bar = TRUE;
+                if (style & WS_SYSMENU) wf.close_button = TRUE;
+                if (style & WS_MINIMIZEBOX) wf.minimize_button = TRUE;
+                if (style & WS_MAXIMIZEBOX) wf.maximize_button = TRUE;
+                if (ex_style & WS_EX_TOOLWINDOW) wf.utility = TRUE;
+            }
         }
     }
     if (style & WS_THICKFRAME)
@@ -95,7 +100,7 @@ static struct macdrv_window_features get_cocoa_window_features(struct macdrv_win
     if (ex_style & WS_EX_NOACTIVATE) wf.prevents_app_activation = TRUE;
     if (EqualRect(&data->rects.window, &data->rects.visible)) return wf;

-    return get_window_features_for_style(style, ex_style, data->shaped);
+    return get_window_features_for_style(data, style, ex_style, data->shaped);
 }

@@ -1697,7 +1702,11 @@ BOOL macdrv_WindowPosChanging(HWND hwnd, UINT swp_flags, BOOL shaped, const stru
  */
 BOOL macdrv_GetWindowStyleMasks(HWND hwnd, UINT style, UINT ex_style, UINT *style_mask, UINT *ex_style_mask)
 {
-    struct macdrv_window_features wf = get_window_features_for_style(style, ex_style, FALSE);
+    struct macdrv_win_data *data = get_win_data(hwnd);
+    struct macdrv_window_features wf;
+
+    wf = get_window_features_for_style(data, style, ex_style, FALSE);
+    release_win_data(data);

*style_mask = ex_style = 0;
     if (wf.title_bar)