[PATCH 1/1] winex11.drv: Resizing the window is allowed When the window is being restored from its maximized state.

[chenjiangyi]

From: chenjiangyi

When the window is restoring from the maximized state, its size should be adjustable.
 Some window managers may not correctly send the PropertyNotify event for the _NET_WM_STATE property
 When the window is maximized but its size is restricted to normal size by XSetWMNormalHints.

Signed-off-by: chenjiangyi 
---
 dlls/winex11.drv/window.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/dlls/winex11.drv/window.c b/dlls/winex11.drv/window.c
index 615fb9da086..a4833071188 100644
--- a/dlls/winex11.drv/window.c
+++ b/dlls/winex11.drv/window.c
@@ -417,6 +417,13 @@ static BOOL is_window_managed( HWND hwnd, UINT swp_flags, BOOL fullscreen )
 static inline BOOL is_window_resizable( struct x11drv_win_data *data, DWORD style )
 {
     if (style & WS_THICKFRAME) return TRUE;
+    /* When the window is restoring from the maximized state, its size should be adjustable.
+    Some window managers may not correctly send the PropertyNotify event for the _NET_WM_STATE property
+    When the window is maximized but its size is restricted to normal size by XSetWMNormalHints.
+    */
+    if (!(style & (WS_MINIMIZE | WS_MAXIMIZE)) && (data->pending_state.wm_state == NormalState)
+        && (data->current_state.net_wm_state & (1 << NET_WM_STATE_MAXIMIZED)) && !data->configure_serial)
+        return TRUE;
     /* Metacity needs the window to be resizable to make it fullscreen */
     return data->is_fullscreen;
 }