[gtk/gtk-4-6: 1/5] tree/iconview: Use a unique drag action in drag_enter/motion callbacks

[Matthias Clasen <matthiasc src gnome org>]

commit 7e4d6b556c07cfd721023a57aad87effd21093d8
Author: Mat <mail mathias is>
Date:   Sat Jul 16 20:50:41 2022 +0300

    tree/iconview: Use a unique drag action in drag_enter/motion callbacks
    
    Functions already exist for providing a unique drag action for gdk_drop_finish().
    Reuse these functions in the drag_enter/motion callbacks, since they require
    a unique action as the return value.
    
    Fixes #3187

 gtk/gtkiconview.c | 59 ++++++++++++++++++++++++++++---------------------------
 gtk/gtktreeview.c | 59 ++++++++++++++++++++++++++++---------------------------
 2 files changed, 60 insertions(+), 58 deletions(-)
---
diff --git a/gtk/gtkiconview.c b/gtk/gtkiconview.c
index 41f824610d..9a35cc682e 100644
--- a/gtk/gtkiconview.c
+++ b/gtk/gtkiconview.c
@@ -5726,8 +5726,35 @@ drag_scroll_timeout (gpointer data)
   return TRUE;
 }
 
+static GdkDragAction
+gtk_icon_view_get_action (GtkWidget *widget,
+                          GdkDrop   *drop)
+{
+  GtkIconView *iconview = GTK_ICON_VIEW (widget);
+  GdkDrag *drag = gdk_drop_get_drag (drop);
+  GdkDragAction actions;
+
+  actions = gdk_drop_get_actions (drop);
+
+  if (drag == iconview->priv->drag &&
+      actions & GDK_ACTION_MOVE)
+    return GDK_ACTION_MOVE;
+
+  if (actions & GDK_ACTION_COPY)
+    return GDK_ACTION_COPY;
+
+  if (actions & GDK_ACTION_MOVE)
+    return GDK_ACTION_MOVE;
+
+  if (actions & GDK_ACTION_LINK)
+    return GDK_ACTION_LINK;
+
+  return 0;
+}
+
 static gboolean
 set_destination (GtkIconView        *icon_view,
+                GdkDrop            *drop,
                 GtkDropTargetAsync *dest,
                 int                 x,
                 int                 y,
@@ -5814,7 +5841,7 @@ set_destination (GtkIconView        *icon_view,
 out:
   if (can_drop)
     {
-      *suggested_action = GDK_ACTION_ALL;
+      *suggested_action = gtk_icon_view_get_action (widget, drop);
 
       gtk_icon_view_set_drag_dest_item (GTK_ICON_VIEW (widget),
                                        path, pos);
@@ -6054,7 +6081,7 @@ gtk_icon_view_drag_motion (GtkDropTargetAsync *dest,
   gboolean empty;
   GdkDragAction result;
 
-  if (!set_destination (icon_view, dest, x, y, &suggested_action, &target))
+  if (!set_destination (icon_view, drop, dest, x, y, &suggested_action, &target))
     return 0;
 
   gtk_icon_view_get_drag_dest_item (icon_view, &path, &pos);
@@ -6119,7 +6146,7 @@ gtk_icon_view_drag_drop (GtkDropTargetAsync *dest,
   if (!check_model_dnd (model, GTK_TYPE_TREE_DRAG_DEST, "drop"))
     return FALSE;
 
-  if (!set_destination (icon_view, dest, x, y, &suggested_action, &target))
+  if (!set_destination (icon_view, drop, dest, x, y, &suggested_action, &target))
     return FALSE;
   
   path = get_logical_destination (icon_view, &drop_append_mode);
@@ -6149,32 +6176,6 @@ gtk_icon_view_drag_drop (GtkDropTargetAsync *dest,
     return FALSE;
 }
 
-static GdkDragAction
-gtk_icon_view_get_action (GtkWidget *widget,
-                          GdkDrop   *drop)
-{
-  GtkIconView *iconview = GTK_ICON_VIEW (widget);
-  GdkDrag *drag = gdk_drop_get_drag (drop);
-  GdkDragAction actions;
-
-  actions = gdk_drop_get_actions (drop);
-
-  if (drag == iconview->priv->drag &&
-      actions & GDK_ACTION_MOVE)
-    return GDK_ACTION_MOVE;
-
-  if (actions & GDK_ACTION_COPY)
-    return GDK_ACTION_COPY;
-
-  if (actions & GDK_ACTION_MOVE)
-    return GDK_ACTION_MOVE;
-
-  if (actions & GDK_ACTION_LINK)
-    return GDK_ACTION_LINK;
-
-  return 0;
-}
-
 static void
 gtk_icon_view_drag_data_received (GObject *source,
                                   GAsyncResult *result,
diff --git a/gtk/gtktreeview.c b/gtk/gtktreeview.c
index 55c8b28f15..f684cc1b3e 100644
--- a/gtk/gtktreeview.c
+++ b/gtk/gtktreeview.c
@@ -6845,9 +6845,36 @@ scroll_row_timeout (gpointer data)
   return TRUE;
 }
 
+static GdkDragAction
+gtk_tree_view_get_action (GtkWidget *widget,
+                          GdkDrop   *drop)
+{
+  GtkTreeView *tree_view = GTK_TREE_VIEW (widget);
+  TreeViewDragInfo *di;
+  GdkDrag *drag = gdk_drop_get_drag (drop);
+  GdkDragAction actions;
+
+  di = get_info (tree_view);
+
+  actions = gdk_drop_get_actions (drop);
+
+  if (di && di->drag == drag &&
+      actions & GDK_ACTION_MOVE)
+    return GDK_ACTION_MOVE;
+
+  if (actions & GDK_ACTION_COPY)
+    return GDK_ACTION_COPY;
+
+  if (actions & GDK_ACTION_MOVE)
+    return GDK_ACTION_MOVE;
+
+  return 0;
+}
+
 /* Returns TRUE if event should not be propagated to parent widgets */
 static gboolean
 set_destination_row (GtkTreeView         *tree_view,
+                     GdkDrop             *drop,
                      GtkDropTargetAsync  *dest,
                      /* coordinates relative to the widget */
                      int                  x,
@@ -6953,7 +6980,7 @@ set_destination_row (GtkTreeView         *tree_view,
 out:
   if (can_drop)
     {
-      *suggested_action = GDK_ACTION_COPY | GDK_ACTION_MOVE;
+      *suggested_action = gtk_tree_view_get_action (widget, drop);
 
       gtk_tree_view_set_drag_dest_row (GTK_TREE_VIEW (widget),
                                        path, pos);
@@ -7218,7 +7245,7 @@ gtk_tree_view_drag_motion (GtkDropTargetAsync *dest,
   GdkDragAction suggested_action = 0;
   GType target;
 
-  if (!set_destination_row (tree_view, dest, x, y, &suggested_action, &target))
+  if (!set_destination_row (tree_view, drop, dest, x, y, &suggested_action, &target))
     return 0;
 
   priv->event_last_x = x;
@@ -7298,7 +7325,7 @@ gtk_tree_view_drag_drop (GtkDropTargetAsync *dest,
   if (!check_model_dnd (model, GTK_TYPE_TREE_DRAG_DEST, "drag_drop"))
     return FALSE;
 
-  if (!set_destination_row (tree_view, dest, x, y, &suggested_action, &target))
+  if (!set_destination_row (tree_view, drop, dest, x, y, &suggested_action, &target))
     return FALSE;
 
   path = get_logical_dest_row (tree_view, &path_down_mode, &drop_append_mode);
@@ -7331,32 +7358,6 @@ gtk_tree_view_drag_drop (GtkDropTargetAsync *dest,
     return FALSE;
 }
 
-static GdkDragAction
-gtk_tree_view_get_action (GtkWidget *widget,
-                          GdkDrop   *drop)
-{
-  GtkTreeView *tree_view = GTK_TREE_VIEW (widget);
-  TreeViewDragInfo *di;
-  GdkDrag *drag = gdk_drop_get_drag (drop);
-  GdkDragAction actions;
-
-  di = get_info (tree_view);
-
-  actions = gdk_drop_get_actions (drop);
-
-  if (di && di->drag == drag &&
-      actions & GDK_ACTION_MOVE)
-    return GDK_ACTION_MOVE;
-
-  if (actions & GDK_ACTION_COPY)
-    return GDK_ACTION_COPY;
-
-  if (actions & GDK_ACTION_MOVE)
-    return GDK_ACTION_MOVE;
-
-  return 0;
-}
-
 static void
 gtk_tree_view_drag_data_received (GObject      *source,
                                   GAsyncResult *result,