From 79dae5f2b4a75211935527ef3ebcdcedf9c423be Mon Sep 17 00:00:00 2001
From: Robin Gareus <robin@gareus.org>
Date: Wed, 25 Sep 2024 19:32:21 +0200
Subject: [PATCH] Implement multitouch grab

---
 libs/tk/ydk/gdkdisplay.c         |  5 +++++
 libs/tk/ydk/gdkwindow.c          | 24 ++++++++++++++++++++++++
 libs/tk/ydk/ydk/gdk/gdkdisplay.h |  2 ++
 3 files changed, 31 insertions(+)

diff --git a/libs/tk/ydk/gdkdisplay.c b/libs/tk/ydk/gdkdisplay.c
index f7b43cf874..b9b036cebe 100644
--- a/libs/tk/ydk/gdkdisplay.c
+++ b/libs/tk/ydk/gdkdisplay.c
@@ -153,6 +153,11 @@ gdk_display_dispose (GObject *object)
   display->queued_events = NULL;
   display->queued_tail = NULL;
 
+  if (display->touch_grabs)
+    {
+      g_hash_table_destroy (display->touch_grabs);
+    }
+
   _gdk_displays = g_slist_remove (_gdk_displays, object);
 
   if (gdk_display_get_default() == display)
diff --git a/libs/tk/ydk/gdkwindow.c b/libs/tk/ydk/gdkwindow.c
index fab05d1cac..054d628814 100644
--- a/libs/tk/ydk/gdkwindow.c
+++ b/libs/tk/ydk/gdkwindow.c
@@ -10848,6 +10848,30 @@ proxy_button_event (GdkEvent *source_event,
 				type, state,
 				NULL, serial);
 
+  /* multitouch grab */
+  if (type == GDK_TOUCH_BEGIN && !source_event->any.send_event)
+    {
+      GdkEventTouch* tev = (GdkEventTouch*) source_event;
+      if (!display->touch_grabs) {
+	display->touch_grabs = g_hash_table_new (g_direct_hash, NULL);
+      }
+      event_win = _gdk_window_find_descendant_at (toplevel_window, toplevel_x, toplevel_y, NULL, NULL);
+      g_hash_table_insert (display->touch_grabs, GUINT_TO_POINTER (tev->sequence), event_win);
+    }
+  else if (type == GDK_TOUCH_END && display->touch_grabs)
+    {
+      GdkEventTouch* tev = (GdkEventTouch*) source_event;
+      g_hash_table_remove (display->touch_grabs, GUINT_TO_POINTER (tev->sequence));
+    }
+  else if (type == GDK_TOUCH_UPDATE && display->touch_grabs)
+    {
+      GdkEventTouch* tev = (GdkEventTouch*) source_event;
+      void* w = g_hash_table_lookup (display->touch_grabs, GUINT_TO_POINTER (tev->sequence));
+      if (w) {
+	event_win = GDK_WINDOW (w);
+      }
+    }
+
   if (event_win == NULL || display->ignore_core_events)
     return TRUE;
 
diff --git a/libs/tk/ydk/ydk/gdk/gdkdisplay.h b/libs/tk/ydk/ydk/gdk/gdkdisplay.h
index 7cc8665144..96bb0572c1 100644
--- a/libs/tk/ydk/ydk/gdk/gdkdisplay.h
+++ b/libs/tk/ydk/ydk/gdk/gdkdisplay.h
@@ -101,6 +101,8 @@ struct _GdkDisplay
   GdkKeyboardGrabInfo GSEAL (keyboard_grab);
   GdkPointerWindowInfo GSEAL (pointer_info);
 
+  GHashTable *GSEAL (touch_grabs);
+
   /* Last reported event time from server */
   guint32 GSEAL (last_event_time);
 };