[gtk: 13/19] Add _gdk_win32_get_cursor_pos utility

[Matthias Clasen <matthiasc src gnome org>]

commit 52f7bb6950ee53f5873d765165b7b1f14cac33a6
Author: Luca Bacci <luca bacci982 gmail com>
Date:   Mon Aug 16 14:39:25 2021 +0200

    Add _gdk_win32_get_cursor_pos utility

 gdk/win32/gdkdevice-win32.c      |  4 +--
 gdk/win32/gdkdevice-winpointer.c |  4 +--
 gdk/win32/gdkdevice-wintab.c     |  2 +-
 gdk/win32/gdkevents-win32.c      | 69 ++++++++++++++++++++++++++++++++++++++--
 gdk/win32/gdkprivate-win32.h     |  2 ++
 5 files changed, 74 insertions(+), 7 deletions(-)
---
diff --git a/gdk/win32/gdkdevice-win32.c b/gdk/win32/gdkdevice-win32.c
index 35802b93a2..d153fcfd23 100644
--- a/gdk/win32/gdkdevice-win32.c
+++ b/gdk/win32/gdkdevice-win32.c
@@ -89,7 +89,7 @@ gdk_device_win32_query_state (GdkDevice        *device,
       hwnd = NULL;
     }
 
-  GetCursorPos (&point);
+  _gdk_win32_get_cursor_pos (&point);
 
   if (hwnd)
     ScreenToClient (hwnd, &point);
@@ -177,7 +177,7 @@ _gdk_device_win32_surface_at_position (GdkDevice       *device,
   HWND hwnd;
   RECT rect;
 
-  if (!GetCursorPos (&screen_pt))
+  if (!_gdk_win32_get_cursor_pos (&screen_pt))
     return NULL;
 
   /* Use WindowFromPoint instead of ChildWindowFromPoint(Ex).
diff --git a/gdk/win32/gdkdevice-winpointer.c b/gdk/win32/gdkdevice-winpointer.c
index a2190ed4d5..774932bc25 100644
--- a/gdk/win32/gdkdevice-winpointer.c
+++ b/gdk/win32/gdkdevice-winpointer.c
@@ -80,7 +80,7 @@ gdk_device_winpointer_query_state (GdkDevice        *device,
       hwnd = NULL;
     }
 
-  GetCursorPos (&point);
+  _gdk_win32_get_cursor_pos (&point);
 
   if (hwnd)
     ScreenToClient (hwnd, &point);
@@ -154,7 +154,7 @@ gdk_device_winpointer_surface_at_position (GdkDevice       *device,
   HWND hwnd;
   RECT rect;
 
-  if (!GetCursorPos (&screen_pt))
+  if (!_gdk_win32_get_cursor_pos (&screen_pt))
     return NULL;
 
   /* Use WindowFromPoint instead of ChildWindowFromPoint(Ex).
diff --git a/gdk/win32/gdkdevice-wintab.c b/gdk/win32/gdkdevice-wintab.c
index 6e94545767..267e773ee0 100644
--- a/gdk/win32/gdkdevice-wintab.c
+++ b/gdk/win32/gdkdevice-wintab.c
@@ -88,7 +88,7 @@ gdk_device_wintab_query_state (GdkDevice        *device,
       hwnd = NULL;
     }
 
-  GetCursorPos (&point);
+  _gdk_win32_get_cursor_pos (&point);
 
   if (hwnd)
     ScreenToClient (hwnd, &point);
diff --git a/gdk/win32/gdkevents-win32.c b/gdk/win32/gdkevents-win32.c
index c49c0ed2fd..08f08b85ae 100644
--- a/gdk/win32/gdkevents-win32.c
+++ b/gdk/win32/gdkevents-win32.c
@@ -166,6 +166,9 @@ static int both_shift_pressed[2]; /* to store keycodes for shift keys */
 static HHOOK keyboard_hook = NULL;
 static UINT aerosnap_message;
 
+static gboolean pen_touch_input;
+static POINT pen_touch_cursor_position;
+
 static void
 track_mouse_event (DWORD dwFlags,
                   HWND  hwnd)
@@ -200,6 +203,18 @@ _gdk_win32_get_next_tick (gulong suggested_tick)
     return cur_tick = suggested_tick;
 }
 
+BOOL
+_gdk_win32_get_cursor_pos (LPPOINT lpPoint)
+{
+  if (pen_touch_input)
+    {
+      *lpPoint = pen_touch_cursor_position;
+      return TRUE;
+    }
+  else
+    return GetCursorPos (lpPoint);
+}
+
 static void
 generate_focus_event (GdkDeviceManagerWin32 *device_manager,
                       GdkSurface        *window,
@@ -2215,6 +2230,8 @@ gdk_event_translate (MSG *msg,
                g_print (" (%d,%d)",
                         GET_X_LPARAM (msg->lParam), GET_Y_LPARAM (msg->lParam)));
 
+      pen_touch_input = FALSE;
+
       g_set_object (&window, find_window_for_mouse_event (window, msg));
       /* TODO_CSW?: there used to some synthesize and propagate */
       if (GDK_SURFACE_DESTROYED (window))
@@ -2257,6 +2274,8 @@ gdk_event_translate (MSG *msg,
                g_print (" (%d,%d)",
                         GET_X_LPARAM (msg->lParam), GET_Y_LPARAM (msg->lParam)));
 
+      pen_touch_input = FALSE;
+
       g_set_object (&window, find_window_for_mouse_event (window, msg));
 
       if (pointer_grab == NULL && implicit_grab_surface != NULL)
@@ -2315,6 +2334,8 @@ gdk_event_translate (MSG *msg,
                         (gpointer) msg->wParam,
                         GET_X_LPARAM (msg->lParam), GET_Y_LPARAM (msg->lParam)));
 
+      pen_touch_input = FALSE;
+
       new_window = window;
 
       if (pointer_grab != NULL)
@@ -2417,6 +2438,8 @@ gdk_event_translate (MSG *msg,
       GDK_NOTE (EVENTS, g_print (" %d (%ld,%ld)",
                                 HIWORD (msg->wParam), msg->pt.x, msg->pt.y));
 
+      pen_touch_input = FALSE;
+
       new_window = NULL;
       hwnd = WindowFromPoint (msg->pt);
       ignore_leave = FALSE;
@@ -2464,6 +2487,13 @@ gdk_event_translate (MSG *msg,
           break;
         }
 
+      if (IS_POINTER_PRIMARY_WPARAM (msg->wParam))
+        {
+          current_root_x = pen_touch_cursor_position.x = GET_X_LPARAM (msg->lParam);
+          current_root_y = pen_touch_cursor_position.y = GET_Y_LPARAM (msg->lParam);
+          pen_touch_input = TRUE;
+        }
+
       if (pointer_grab != NULL &&
           !pointer_grab->implicit &&
           !pointer_grab->owner_events)
@@ -2486,6 +2516,13 @@ gdk_event_translate (MSG *msg,
           break;
         }
 
+      if (IS_POINTER_PRIMARY_WPARAM (msg->wParam))
+        {
+          current_root_x = pen_touch_cursor_position.x = GET_X_LPARAM (msg->lParam);
+          current_root_y = pen_touch_cursor_position.y = GET_Y_LPARAM (msg->lParam);
+          pen_touch_input = TRUE;
+        }
+
       if (pointer_grab != NULL &&
           !pointer_grab->implicit &&
           !pointer_grab->owner_events)
@@ -2511,6 +2548,13 @@ gdk_event_translate (MSG *msg,
           break;
         }
 
+      if (IS_POINTER_PRIMARY_WPARAM (msg->wParam))
+        {
+          current_root_x = pen_touch_cursor_position.x = GET_X_LPARAM (msg->lParam);
+          current_root_y = pen_touch_cursor_position.y = GET_Y_LPARAM (msg->lParam);
+          pen_touch_input = TRUE;
+        }
+
       if (pointer_grab != NULL &&
           !pointer_grab->implicit &&
           !pointer_grab->owner_events)
@@ -2542,6 +2586,13 @@ gdk_event_translate (MSG *msg,
           break;
         }
 
+      if (IS_POINTER_PRIMARY_WPARAM (msg->wParam))
+        {
+          current_root_x = pen_touch_cursor_position.x = GET_X_LPARAM (msg->lParam);
+          current_root_y = pen_touch_cursor_position.y = GET_Y_LPARAM (msg->lParam);
+          pen_touch_input = TRUE;
+        }
+
       if (IS_POINTER_PRIMARY_WPARAM (msg->wParam) &&
           !IS_POINTER_INCONTACT_WPARAM (msg->wParam) &&
           mouse_window != NULL)
@@ -2553,7 +2604,7 @@ gdk_event_translate (MSG *msg,
             {
               make_crossing_event(event_device,
                                   NULL,
-                                  &msg->pt,
+                                  &pen_touch_cursor_position,
                                   event_time);
             }
         }
@@ -2569,6 +2620,13 @@ gdk_event_translate (MSG *msg,
           break;
         }
 
+      if (IS_POINTER_PRIMARY_WPARAM (msg->wParam))
+        {
+          current_root_x = pen_touch_cursor_position.x = GET_X_LPARAM (msg->lParam);
+          current_root_y = pen_touch_cursor_position.y = GET_Y_LPARAM (msg->lParam);
+          pen_touch_input = TRUE;
+        }
+
       if (pointer_grab != NULL &&
           !pointer_grab->implicit &&
           !pointer_grab->owner_events)
@@ -2591,6 +2649,13 @@ gdk_event_translate (MSG *msg,
           break;
         }
 
+      if (IS_POINTER_PRIMARY_WPARAM (msg->wParam))
+        {
+          current_root_x = pen_touch_cursor_position.x = GET_X_LPARAM (msg->lParam);
+          current_root_y = pen_touch_cursor_position.y = GET_Y_LPARAM (msg->lParam);
+          pen_touch_input = TRUE;
+        }
+
       if (!IS_POINTER_INRANGE_WPARAM (msg->wParam))
         {
           gdk_winpointer_input_events (window, NULL, msg);
@@ -2604,7 +2669,7 @@ gdk_event_translate (MSG *msg,
             {
               make_crossing_event(event_device,
                                   NULL,
-                                  &msg->pt,
+                                  &pen_touch_cursor_position,
                                   event_time);
             }
         }
diff --git a/gdk/win32/gdkprivate-win32.h b/gdk/win32/gdkprivate-win32.h
index 58714024eb..67d99a4532 100644
--- a/gdk/win32/gdkprivate-win32.h
+++ b/gdk/win32/gdkprivate-win32.h
@@ -157,6 +157,8 @@ GType _gdk_gc_win32_get_type (void);
 
 gulong _gdk_win32_get_next_tick (gulong suggested_tick);
 
+BOOL _gdk_win32_get_cursor_pos (LPPOINT lpPoint);
+
 void _gdk_surface_init_position     (GdkSurface *window);
 void _gdk_surface_move_resize_child (GdkSurface *window,
                                      int        x,