Set and read the XdndActionList property defined in the Xdnd spec. We do

Thu Jan 21 02:11:44 1999  Owen Taylor  <otaylor@redhat.com>

	* Set and read the XdndActionList property defined
	in the Xdnd spec. We do this always, not just for
	XdndActionAsk like the spec says, but if we don't
	find it, we fall back to actions = suggested_action,
	which is compatible with the language of the spec.

1 files changed, 110 insertions, 11 deletions

diff --git a/gdk/gdkdnd.c b/gdk/gdkdnd.c
index b2653628a..fd5a26564 100644
--- a/gdk/gdkdnd.c
+++ b/gdk/gdkdnd.c
@@ -60,6 +60,8 @@ struct _GdkDragContextPrivate {
 
   Window  dest_xid;
   guint xdnd_targets_set : 1;   /* Whether we've already set XdndTypeList */
+  guint xdnd_actions_set : 1;   /* Whether we've already set XdndActionsList */
+  guint xdnd_have_actions : 1; /* Whether an XdndActionList was provided */
   guint motif_targets_set : 1;  /* Whether we've already set motif initiator info */
   guint drag_status : 4;	/* current status of drag */
 
@@ -1953,16 +1955,16 @@ static void
 xdnd_set_targets (GdkDragContext *context)
 {
   GdkDragContextPrivate *private = (GdkDragContextPrivate *)context;
-  GdkAtom *typelist;
+  GdkAtom *atomlist;
   GList *tmp_list = context->targets;
   gint i;
-  gint n_targets = g_list_length (context->targets);
+  gint n_atoms = g_list_length (context->targets);
 
-  typelist = g_new (GdkAtom, n_targets);
+  atomlist = g_new (GdkAtom, n_atoms);
   i = 0;
   while (tmp_list)
     {
-      typelist[i] = GPOINTER_TO_INT (tmp_list->data);
+      atomlist[i] = GPOINTER_TO_INT (tmp_list->data);
       tmp_list = tmp_list->next;
       i++;
     }
@@ -1971,12 +1973,58 @@ xdnd_set_targets (GdkDragContext *context)
 		   GDK_WINDOW_XWINDOW (context->source_window),
 		   gdk_atom_intern ("XdndTypeList", FALSE),
 		   XA_ATOM, 32, PropModeReplace,
-		   (guchar *)typelist, n_targets);
+		   (guchar *)atomlist, n_atoms);
 
   private->xdnd_targets_set = 1;
 }
 
 static void
+xdnd_set_actions (GdkDragContext *context)
+{
+  GdkDragContextPrivate *private = (GdkDragContextPrivate *)context;
+  GdkAtom *atomlist;
+  gint i;
+  gint n_atoms;
+  guint actions;
+
+  if (!xdnd_actions_initialized)
+    xdnd_initialize_actions();
+
+  actions = context->actions;
+  n_atoms = 0;
+  for (i=0; i<xdnd_n_actions; i++)
+    {
+      if (actions & xdnd_actions_table[i].action)
+	{
+	  actions &= ~xdnd_actions_table[i].action;
+	  n_atoms++;
+	}
+    }
+
+  atomlist = g_new (GdkAtom, n_atoms);
+
+  actions = context->actions;
+  n_atoms = 0;
+  for (i=0; i<xdnd_n_actions; i++)
+    {
+      if (actions & xdnd_actions_table[i].action)
+	{
+	  actions &= ~xdnd_actions_table[i].action;
+	  atomlist[n_atoms] = xdnd_actions_table[i].atom;
+	  n_atoms++;
+	}
+    }
+
+  XChangeProperty (GDK_WINDOW_XDISPLAY (context->source_window),
+		   GDK_WINDOW_XWINDOW (context->source_window),
+		   gdk_atom_intern ("XdndActionList", FALSE),
+		   XA_ATOM, 32, PropModeReplace,
+		   (guchar *)atomlist, n_atoms);
+
+  private->xdnd_actions_set = 1;
+}
+
+static void
 xdnd_send_enter (GdkDragContext *context)
 {
   XEvent xev;
@@ -2014,6 +2062,9 @@ xdnd_send_enter (GdkDragContext *context)
 	}
     }
 
+  if (!private->xdnd_actions_set)
+    xdnd_set_actions (context);
+
   if (!gdk_send_xevent (GDK_WINDOW_XWINDOW (context->dest_window),
 			FALSE, 0, &xev))
     {
@@ -2188,12 +2239,17 @@ xdnd_check_dest (Window win)
 static GdkFilterReturn 
 xdnd_enter_filter (GdkXEvent *xev,
 		   GdkEvent  *event,
-		   gpointer   data)
+		   gpointer   cb_data)
 {
   XEvent *xevent = (XEvent *)xev;
   GdkDragContext *new_context;
   gint i;
   
+  Atom type;
+  int format;
+  gulong nitems, after;
+  Atom *data;
+
   guint32 source_window = xevent->xclient.data.l[0];
   gboolean get_types = ((xevent->xclient.data.l[1] & 1) != 0);
   gint version = (xevent->xclient.data.l[1] & 0xff000000) >> 24;
@@ -2237,11 +2293,6 @@ xdnd_enter_filter (GdkXEvent *xev,
   new_context->targets = NULL;
   if (get_types)
     {
-      Atom type;
-      int format;
-      gulong nitems, after;
-      Atom *data;
-
       XGetWindowProperty (GDK_WINDOW_XDISPLAY (event->any.window), 
 			  source_window, 
 			  gdk_atom_intern ("XdndTypeList", FALSE), 0, 65536,
@@ -2268,6 +2319,44 @@ xdnd_enter_filter (GdkXEvent *xev,
 						GUINT_TO_POINTER (xevent->xclient.data.l[2+i]));
     }
 
+  /* Get the XdndActionList, if set */
+
+  XGetWindowProperty (GDK_WINDOW_XDISPLAY (event->any.window), 
+		      source_window, 
+		      gdk_atom_intern ("XdndActionList", FALSE), 0, 65536,
+		      False, XA_ATOM, &type, &format, &nitems,
+		      &after, (guchar **)&data);
+  
+  if ((format == 32) && (type == XA_ATOM))
+    {
+      new_context->actions = 0;
+
+      for (i=0; i<nitems; i++)
+	new_context->actions |= xdnd_action_from_atom (data[i]);
+
+      ((GdkDragContextPrivate *)new_context)->xdnd_have_actions = TRUE;
+
+#ifdef G_ENABLE_DEBUG
+      if (gdk_debug_flags & GDK_DEBUG_DND)
+	{
+	  GString *action_str = g_string_new (NULL);
+	  if (new_context->actions & GDK_ACTION_MOVE)
+	    g_string_append(action_str, "MOVE ");
+	  if (new_context->actions & GDK_ACTION_COPY)
+	    g_string_append(action_str, "COPY ");
+	  if (new_context->actions & GDK_ACTION_LINK)
+	    g_string_append(action_str, "LINK ");
+	  if (new_context->actions & GDK_ACTION_ASK)
+	    g_string_append(action_str, "ASK ");
+	  
+	  g_message("\tactions = %s", action_str->str);
+	  g_string_free (action_str, TRUE);
+	}
+#endif /* G_ENABLE_DEBUG */
+
+      XFree(data);
+    }
+  
 #ifdef G_ENABLE_DEBUG
   if (gdk_debug_flags & GDK_DEBUG_DND)
     print_target_list (new_context->targets);
@@ -2340,6 +2429,8 @@ xdnd_position_filter (GdkXEvent *xev,
       event->dnd.time = time;
 
       current_dest_drag->suggested_action = xdnd_action_from_atom (action);
+      if (!((GdkDragContextPrivate *)current_dest_drag)->xdnd_have_actions)
+	current_dest_drag->actions = current_dest_drag->suggested_action;
 
       event->dnd.x_root = x_root;
       event->dnd.y_root = y_root;
@@ -2436,6 +2527,7 @@ gdk_drag_do_leave (GdkDragContext *context, guint32 time)
 	  xdnd_send_leave (context);
 	  break;
 	case GDK_DRAG_PROTO_ROOTWIN:
+	case GDK_DRAG_PROTO_NONE:
 	  break;
 	}
 
@@ -2639,6 +2731,7 @@ gdk_drag_motion (GdkDragContext *context,
 	      break;
 
 	    case GDK_DRAG_PROTO_ROOTWIN:
+	    case GDK_DRAG_PROTO_NONE:
 	      break;
 	    }
 	  private->old_action = action;
@@ -2710,6 +2803,9 @@ gdk_drag_motion (GdkDragContext *context,
 		gdk_event_put (&temp_event);
 	      }
 	      break;
+	    case GDK_DRAG_PROTO_NONE:
+	      g_warning ("GDK_DRAG_PROTO_NONE is not valid in gdk_drag_motion()");
+	      break;
 	    }
 	}
       else
@@ -2741,6 +2837,9 @@ gdk_drag_drop (GdkDragContext *context,
 	case GDK_DRAG_PROTO_ROOTWIN:
 	  g_warning ("Drops for GDK_DRAG_PROTO_ROOTWIN must be handled internally");
 	  break;
+	case GDK_DRAG_PROTO_NONE:
+	  g_warning ("GDK_DRAG_PROTO_NONE is not valid in gdk_drag_drop()");
+	  break;
 	}
     }
 }