From dc60008f55061494eb28280799f9ad913e55fd8c Mon Sep 17 00:00:00 2001
From: Jeremy Wootten <jeremy@elementaryos.org>
Date: Tue, 20 Jun 2023 19:00:52 +0100
Subject: [PATCH] Implement simple drop destination for sidebar

---
 src/MainWindow.vala      | 35 +++++++++++++++++++--------------
 src/Widgets/Sidebar.vala | 42 ++++++++++++++++++++++++++++++++++++++++
 2 files changed, 62 insertions(+), 15 deletions(-)

diff --git a/src/MainWindow.vala b/src/MainWindow.vala
index 4dab94987d..bfd8fc7d40 100644
--- a/src/MainWindow.vala
+++ b/src/MainWindow.vala
@@ -109,7 +109,7 @@ namespace Scratch {
             { ACTION_FIND_PREVIOUS, action_find_previous },
             { ACTION_FIND_GLOBAL, action_find_global, "s" },
             { ACTION_OPEN, action_open },
-            { ACTION_OPEN_FOLDER, action_open_folder },
+            { ACTION_OPEN_FOLDER, action_open_folder, "s" },
             { ACTION_COLLAPSE_ALL_FOLDERS, action_collapse_all_folders },
             { ACTION_ORDER_FOLDERS, action_order_folders },
             { ACTION_PREFERENCES, action_preferences },
@@ -863,23 +863,28 @@ namespace Scratch {
             }
         }
 
-        private void action_open_folder () {
-            var chooser = new Gtk.FileChooserNative (
-                "Select a folder.", this, Gtk.FileChooserAction.SELECT_FOLDER,
-                _("_Open"),
-                _("_Cancel")
-            );
+        private void action_open_folder (SimpleAction action, Variant? param) {
+            var path = param.get_string ();
+            if (path == "") {
+                var chooser = new Gtk.FileChooserNative (
+                    "Select a folder.", this, Gtk.FileChooserAction.SELECT_FOLDER,
+                    _("_Open"),
+                    _("_Cancel")
+                );
 
-            chooser.select_multiple = true;
+                chooser.select_multiple = true;
 
-            if (chooser.run () == Gtk.ResponseType.ACCEPT) {
-                chooser.get_files ().foreach ((glib_file) => {
-                    var foldermanager_file = new FolderManager.File (glib_file.get_path ());
-                    folder_manager_view.open_folder (foldermanager_file);
-                });
-            }
+                if (chooser.run () == Gtk.ResponseType.ACCEPT) {
+                    chooser.get_files ().foreach ((glib_file) => {
+                        var foldermanager_file = new FolderManager.File (glib_file.get_path ());
+                        folder_manager_view.open_folder (foldermanager_file);
+                    });
+                }
 
-            chooser.destroy ();
+                chooser.destroy ();
+            } else {
+                folder_manager_view.open_folder (new FolderManager.File (path));
+            }
         }
 
         private void action_collapse_all_folders () {
diff --git a/src/Widgets/Sidebar.vala b/src/Widgets/Sidebar.vala
index e0575602f7..abd4eef734 100644
--- a/src/Widgets/Sidebar.vala
+++ b/src/Widgets/Sidebar.vala
@@ -18,6 +18,11 @@
  */
 
 public class Code.Sidebar : Gtk.Grid {
+public class Code.Sidebar : Gtk.Box {
+    public enum TargetType {
+        URI_LIST
+    }
+
     public Gtk.Stack stack { get; private set; }
     public Code.ChooseProjectButton choose_project_button { get; private set; }
     public Hdy.HeaderBar headerbar { get; private set; }
@@ -53,6 +58,7 @@ public class Code.Sidebar : Gtk.Grid {
 
         var add_folder_button = new Gtk.Button.from_icon_name ("folder-open-symbolic", Gtk.IconSize.SMALL_TOOLBAR) {
             action_name = Scratch.MainWindow.ACTION_PREFIX + Scratch.MainWindow.ACTION_OPEN_FOLDER,
+            action_target = new Variant.string (""),
             always_show_image = true,
             label = _("Open Folder…")
         };
@@ -105,6 +111,42 @@ public class Code.Sidebar : Gtk.Grid {
                     break;
             }
         });
+
+        Gtk.TargetEntry uris = {"text/uri-list", 0, TargetType.URI_LIST};
+        Gtk.drag_dest_set (this, Gtk.DestDefaults.ALL, {uris}, Gdk.DragAction.COPY);
+        drag_data_received.connect (drag_received);
+    }
+
+    private void drag_received (Gtk.Widget w,
+                                Gdk.DragContext ctx,
+                                int x,
+                                int y,
+                                Gtk.SelectionData sel,
+                                uint info,
+                                uint time) {
+
+        if (info == TargetType.URI_LIST) {
+            var uri_list = sel.get_uris ();
+            GLib.List<GLib.File> folder_list = null;
+            foreach (unowned var uri in uri_list) {
+                var file = GLib.File.new_for_uri (uri);
+                // Blocking but for simplicity omit cancellable for now
+                var ftype = file.query_file_type (FileQueryInfoFlags.NOFOLLOW_SYMLINKS);
+                if (ftype == GLib.FileType.DIRECTORY) {
+                  folder_list.prepend (file);
+                }
+            }
+
+            foreach (var folder in folder_list) {
+                var win_group = get_action_group (Scratch.MainWindow.ACTION_GROUP);
+                win_group.activate_action (
+                    Scratch.MainWindow.ACTION_OPEN_FOLDER,
+                    new Variant.string (folder.get_path ())
+                );
+            }
+
+            Gtk.drag_finish (ctx, folder_list.length () > 0, false, time);
+        }
     }
 
     public void add_tab (Code.PaneSwitcher tab) {