win32u: Implement opt-in auto-repeat for WM_(SYS)KEYDOWN messages.

dlls/win32u/message.c

@@ -2292,6 +2292,22 @@ static void send_parent_notify( HWND hwnd, WORD event, WORD idChild, POINT pt )
     }
 }
 
+
+static void handle_keyboard_repeat_message( HWND hwnd )
+{
+    struct user_thread_info *thread_info = get_user_thread_info();
+    MSG *msg = &thread_info->key_repeat_msg;
+    UINT speed;
+
+    msg->lParam = (msg->lParam & ~(LPARAM)0xffff) + ((msg->lParam + 1) & 0xffff);
+
+    if (NtUserSystemParametersInfo( SPI_GETKEYBOARDSPEED, 0, &speed, 0 ))
+        NtUserSetSystemTimer( hwnd, SYSTEM_TIMER_KEY_REPEAT, 400 / (speed + 1) );
+
+    NtUserPostMessage( hwnd, msg->message, msg->wParam, msg->lParam );
+}
+
+
 /***********************************************************************
  *          process_keyboard_message
  *
@@ -2371,6 +2387,33 @@ static BOOL process_keyboard_message( MSG *msg, UINT hw_id, HWND hwnd_filter,
         if (ImmProcessKey( msg->hwnd, NtUserGetKeyboardLayout(0), msg->wParam, msg->lParam, 0 ))
             msg->wParam = VK_PROCESSKEY;
 
+    /* set/kill timers for key auto-repeat */
+    if (remove && keyboard_auto_repeat_enabled)
+    {
+        struct user_thread_info *thread_info = get_user_thread_info();
+
+        switch (msg->message)
+        {
+        case WM_KEYDOWN:
+        case WM_SYSKEYDOWN:
+        {
+            UINT delay;
+
+            if (msg->wParam == VK_PROCESSKEY) break;
+
+            thread_info->key_repeat_msg = *msg;
+            if (NtUserSystemParametersInfo( SPI_GETKEYBOARDDELAY, 0, &delay, 0 ))
+                NtUserSetSystemTimer( msg->hwnd, SYSTEM_TIMER_KEY_REPEAT, (delay + 1) * 250 );
+            break;
+        }
+
+        case WM_KEYUP:
+        case WM_SYSKEYUP:
+            kill_system_timer( thread_info->key_repeat_msg.hwnd, SYSTEM_TIMER_KEY_REPEAT );
+            break;
+        }
+    }
+
     return TRUE;
 }
 
@@ -3565,6 +3608,10 @@ LRESULT WINAPI NtUserDispatchMessage( const MSG *msg )
             case SYSTEM_TIMER_TRACK_MOUSE:
                 update_mouse_tracking_info( msg->hwnd );
                 return 0;
+
+            case SYSTEM_TIMER_KEY_REPEAT:
+                handle_keyboard_repeat_message( msg->hwnd );
+                return 0;
         }
     }
 

dlls/win32u/ntuser_private.h

@@ -32,6 +32,9 @@ enum system_timer_id
 {
     SYSTEM_TIMER_TRACK_MOUSE = 0xfffa,
     SYSTEM_TIMER_CARET = 0xffff,
+
+    /* not compatible with native */
+    SYSTEM_TIMER_KEY_REPEAT = 0xfff0,
 };
 
 struct rawinput_thread_data
@@ -126,6 +129,7 @@ struct user_thread_info
     struct received_message_info *receive_info;           /* Message being currently received */
     struct user_key_state_info   *key_state;              /* Cache of global key state */
     struct imm_thread_data       *imm_thread_data;        /* IMM thread data */
+    MSG                           key_repeat_msg;         /* Last WM_KEYDOWN message to repeat */
     HKL                           kbd_layout;             /* Current keyboard layout */
     UINT                          kbd_layout_id;          /* Current keyboard layout ID */
     struct rawinput_thread_data  *rawinput;               /* RawInput thread local data / buffer */