feat: Python Plugins

src/slic3r/plugin/PluginHostUi.hpp

@@ -0,0 +1,24 @@
+#pragma once
+
+#include <pybind11/pybind11.h>
+
+#include <string>
+
+namespace Slic3r {
+
+// Binds the `orca.host.ui` submodule: native message boxes, progress dialogs,
+// and interactive HTML windows for plugins. All calls run on the main/UI thread
+// (marshaled from the plugin worker thread) and the host owns every window.
+class PluginHostUi
+{
+public:
+    static void RegisterBindings(pybind11::module_& host);
+
+    // Lifecycle hook: close and tear down every UI window owned by a plugin.
+    // Registered via PluginLoader::subscribe_on_unload_callback so UI windows
+    // are destroyed on plugin unload/reload and at app shutdown (before the
+    // Python interpreter is finalized). Matches PluginLifecycleCompleteFn.
+    static void close_windows_for_plugin(const std::string& plugin_key);
+};
+
+} // namespace Slic3r