[gthumb] pasting files: better logic to check if the operation is possible

[Paolo Bacchilega <paobac src gnome org>]

commit 4fae1da60104cba196af7c22fbbfeffd5f25f977
Author: Paolo Bacchilega <paobac src gnome org>
Date:   Mon Nov 4 08:58:24 2019 +0100

    pasting files: better logic to check if the operation is possible
    
    Use gth_file_source_get_drop_actions to check if a paste operation is
    possible.

 extensions/file_manager/actions.c | 33 ++++++++++++++++++++++++---------
 1 file changed, 24 insertions(+), 9 deletions(-)
---
diff --git a/extensions/file_manager/actions.c b/extensions/file_manager/actions.c
index d3a92406..1402d292 100644
--- a/extensions/file_manager/actions.c
+++ b/extensions/file_manager/actions.c
@@ -370,14 +370,15 @@ clipboard_received_cb (GtkClipboard     *clipboard,
                       GtkSelectionData *selection_data,
                       gpointer          user_data)
 {
-       PasteData   *paste_data = user_data;
-       GthBrowser  *browser = paste_data->browser;
-       const char  *raw_data;
-       char       **clipboard_data;
-       int          i;
-       GtkTreePath *path;
-       int          position;
-       GthTask     *task;
+       PasteData      *paste_data = user_data;
+       GthBrowser     *browser = paste_data->browser;
+       const char     *raw_data;
+       char          **clipboard_data;
+       int             i;
+       GdkDragAction   actions;
+       GtkTreePath    *path;
+       int             position;
+       GthTask        *task;
 
        raw_data = (const char *) gtk_selection_data_get_data (selection_data);
        if (raw_data == NULL) {
@@ -400,7 +401,19 @@ clipboard_received_cb (GtkClipboard     *clipboard,
        paste_data->files = g_list_reverse (paste_data->files);
        paste_data->file_source = gth_main_get_file_source (paste_data->destination->file);
 
-       if (paste_data->cut && ! gth_file_source_can_cut (paste_data->file_source, paste_data->files->data)) {
+       actions = gth_file_source_get_drop_actions (paste_data->file_source,
+                                                   paste_data->destination->file,
+                                                   G_FILE (paste_data->files->data));
+       if (actions == 0) {
+               _gtk_error_dialog_run (GTK_WINDOW (browser),
+                                      "%s",
+                                      _("Could not perform the operation"));
+               g_strfreev (clipboard_data);
+               paste_data_free (paste_data);
+               return;
+       }
+
+       if (paste_data->cut && ((actions & GDK_ACTION_MOVE) == 0)) {
                GtkWidget *dialog;
                int        response;
 
@@ -416,6 +429,7 @@ clipboard_received_cb (GtkClipboard     *clipboard,
                gtk_widget_destroy (dialog);
 
                if (response == GTK_RESPONSE_CANCEL) {
+                       g_strfreev (clipboard_data);
                        paste_data_free (paste_data);
                        return;
                }
@@ -442,6 +456,7 @@ clipboard_received_cb (GtkClipboard     *clipboard,
        gth_browser_exec_task (browser, task, GTH_TASK_FLAGS_DEFAULT);
 
        g_object_unref (task);
+       g_strfreev (clipboard_data);
        paste_data_free (paste_data);
 }