Minor fixes to Haiku DND support

* src/haiku_support.cc (MessageReceived): If source is remote,
don't test window ID.
(MouseMoved): Don't send mouse motion if dragging.
(be_drag_message): Return true if quit-flag.
* src/haiku_support.h: Update prototypes.
* src/haikuselect.c (haiku_should_quit_drag): New function.
(Fhaiku_drag_message): If rc is true, quit.

src/haiku_support.cc

@@ -645,6 +645,7 @@ public:
 	struct haiku_drag_and_drop_event rq;
 
 	if (msg->FindInt32 ("emacs:window_id", &windowid) == B_OK
+	    && !msg->IsSourceRemote ()
 	    && windowid == this->window_id)
 	  return;
 
@@ -1449,7 +1450,7 @@ public:
   }
 
   void
-  MouseMoved (BPoint point, uint32 transit, const BMessage *msg)
+  MouseMoved (BPoint point, uint32 transit, const BMessage *drag_msg)
   {
     struct haiku_mouse_motion_event rq;
 
@@ -1459,6 +1460,9 @@ public:
     rq.window = this->Window ();
     rq.time = system_time ();
 
+    if (drag_msg && transit != B_EXITED_VIEW)
+      return;
+
     if (ToolTip ())
       ToolTip ()->SetMouseRelativeLocation (BPoint (-(point.x - tt_absl_pos.x),
 						    -(point.y - tt_absl_pos.y)));
@@ -3960,11 +3964,12 @@ be_drag_message_thread_entry (void *thread_data)
   return 0;
 }
 
-void
+bool
 be_drag_message (void *view, void *message,
 		 void (*block_input_function) (void),
 		 void (*unblock_input_function) (void),
-		 void (*process_pending_signals_function) (void))
+		 void (*process_pending_signals_function) (void),
+		 bool (*should_quit_function) (void))
 {
   EmacsView *vw = (EmacsView *) view;
   EmacsWindow *window = (EmacsWindow *) vw->Window ();
@@ -3995,7 +4000,7 @@ be_drag_message (void *view, void *message,
   unblock_input_function ();
 
   if (infos[1].object < B_OK)
-    return;
+    return false;
 
   block_input_function ();
   resume_thread (infos[1].object);
@@ -4017,8 +4022,11 @@ be_drag_message (void *view, void *message,
       if (infos[0].events & B_EVENT_READ)
 	process_pending_signals_function ();
 
+      if (should_quit_function ())
+	return true;
+
       if (infos[1].events & B_EVENT_INVALID)
-	return;
+	return false;
 
       infos[0].events = B_EVENT_READ;
       infos[1].events = B_EVENT_INVALID;

src/haiku_support.h

@@ -945,11 +945,12 @@ extern "C"
   extern void
   BMessage_delete (void *message);
 
-  extern void
+  extern bool
   be_drag_message (void *view, void *message,
 		   void (*block_input_function) (void),
 		   void (*unblock_input_function) (void),
-		   void (*process_pending_signals_function) (void));
+		   void (*process_pending_signals_function) (void),
+		   bool (*should_quit_function) (void));
 
 #ifdef __cplusplus
   extern void *

src/haikuselect.c

@@ -506,6 +506,12 @@ haiku_lisp_to_message (Lisp_Object obj, void *message)
   CHECK_LIST_END (tem, obj);
 }
 
+static bool
+haiku_should_quit_drag (void)
+{
+  return !NILP (Vquit_flag);
+}
+
 DEFUN ("haiku-drag-message", Fhaiku_drag_message, Shaiku_drag_message,
        2, 2, 0,
        doc: /* Begin dragging MESSAGE from FRAME.
@@ -530,6 +536,7 @@ drag will originate.  */)
   specpdl_ref idx;
   void *be_message;
   struct frame *f;
+  bool rc;
 
   idx = SPECPDL_INDEX ();
   f = decode_window_system_frame (frame);
@@ -541,11 +548,15 @@ drag will originate.  */)
 
   record_unwind_protect_ptr (BMessage_delete, be_message);
   haiku_lisp_to_message (message, be_message);
-  be_drag_message (FRAME_HAIKU_VIEW (f), be_message,
-		   block_input, unblock_input,
-		   process_pending_signals);
+  rc = be_drag_message (FRAME_HAIKU_VIEW (f), be_message,
+			block_input, unblock_input,
+			process_pending_signals,
+			haiku_should_quit_drag);
   FRAME_DISPLAY_INFO (f)->grabbed = 0;
 
+  if (rc)
+    quit ();
+
   return unbind_to (idx, Qnil);
 }