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diff --git a/src/extension/execution-env.h b/src/extension/execution-env.h
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+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Authors:
+ *   Ted Gould <ted@gould.cx>
+ *
+ * Copyright (C) 2007 Authors
+ *
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+#ifndef INKSCAPE_EXTENSION_EXECUTION_ENV_H__
+#define INKSCAPE_EXTENSION_EXECUTION_ENV_H__
+
+#include <glibmm/main.h>
+#include <glibmm/ustring.h>
+
+#include <gtkmm/dialog.h>
+
+namespace Inkscape {
+
+namespace UI {
+namespace View {
+class View;
+} // namespace View
+} // namespace UI
+
+namespace Extension {
+
+class Effect;
+
+namespace  Implementation
+{
+class ImplementationDocumentCache;
+}
+
+class ExecutionEnv {
+private:
+    enum state_t {
+        INIT,     //< The context has been initialized
+        COMPLETE, //< We've completed atleast once
+        RUNNING   //< The effect is currently running
+    };
+    /** \brief  What state the execution engine is in. */
+    state_t _state;
+
+    /** \brief If there is a working dialog it'll be referenced
+               right here. */
+    Gtk::Dialog * _visibleDialog;
+    /** \brief Signal that the run is complete. */
+    sigc::signal<void> _runComplete;
+    /** \brief  In some cases we need a mainLoop, when we do, this is
+                a pointer to it. */
+    Glib::RefPtr<Glib::MainLoop> _mainloop;
+    /** \brief  The document that we're working on. */
+    Inkscape::UI::View::View * _doc;
+    /** \brief  A document cache if we were passed one. */
+    Implementation::ImplementationDocumentCache * _docCache;
+
+    /** \brief  The effect that we're executing in this context. */
+    Effect * _effect;
+
+    /** \brief  Show the working dialog when the effect is executing. */
+    bool _show_working;
+public:
+
+    /** \brief  Create a new context for execution of an effect
+        \param effect  The effect to execute
+        \param doc     The document to execute the effect on
+        \param docCache  The implementation cache of the document.  May be
+                         NULL in which case it'll be created by the execution
+                         environment.
+        \prarm show_working  Show a small dialog signaling the effect
+                             is working.  Allows for user canceling.
+        \param show_errors   If the effect has an error, show it or not.
+    */
+    ExecutionEnv (Effect * effect,
+                  Inkscape::UI::View::View * doc,
+                  Implementation::ImplementationDocumentCache * docCache = nullptr,
+                  bool show_working = true,
+                  bool show_errors = true);
+    virtual ~ExecutionEnv ();
+
+    /** \brief Starts the execution of the effect
+        \return Returns whether the effect was executed to completion */
+    void run ();
+    /** \brief Cancel the execution of the effect */
+    void cancel ();
+    /** \brief Commit the changes to the document */
+    void commit ();
+    /** \brief Undoes what the effect completed. */
+    void undo ();
+    /** \brief Wait for the effect to complete if it hasn't. */
+    bool wait ();
+    void reselect ();
+
+    /** \brief Return reference to working dialog (if any) */
+    Gtk::Dialog *get_working_dialog () { return _visibleDialog; };
+
+private:
+    void runComplete ();
+    void createWorkingDialog ();
+    void workingCanceled (const int resp);
+    void genDocCache ();
+    void killDocCache ();
+};
+
+} }  /* namespace Inkscape, Extension */
+#endif /* INKSCAPE_EXTENSION_EXECUTION_ENV_H__ */
+
+/*
+  Local Variables:
+  mode:c++
+  c-file-style:"stroustrup"
+  c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
+  indent-tabs-mode:nil
+  fill-column:99
+  End:
+*/
+// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :