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diff --git a/src/extension/dependency.h b/src/extension/dependency.h
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+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Authors:
+ * Ted Gould <ted@gould.cx>
+ *
+ * Copyright (C) 2004 Authors
+ *
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+#ifndef INKSCAPE_EXTENSION_DEPENDENCY_H__
+#define INKSCAPE_EXTENSION_DEPENDENCY_H__
+
+#include <glibmm/ustring.h>
+#include "xml/repr.h"
+
+namespace Inkscape {
+namespace Extension {
+
+class Extension;
+
+/** \brief A class to represent a dependency for an extension. There
+ are different things that can be done in a dependency, and
+ this class takes care of all of them. */
+class Dependency {
+
+public:
+ /** \brief All the possible types of dependencies. */
+ enum type_t {
+ TYPE_EXECUTABLE, /**< Look for an executable */
+ TYPE_FILE, /**< Look to make sure a file exists */
+ TYPE_EXTENSION, /**< Make sure a specific extension is loaded and functional */
+ TYPE_CNT /**< Number of types */
+ };
+
+ /** \brief All of the possible locations to look for the dependency. */
+ enum location_t {
+ LOCATION_PATH, /**< Look in the PATH for this dependency - historically this is the default
+ (it's a bit odd for interpreted script files but makes sense for other executables) */
+ LOCATION_EXTENSIONS, /**< Look in the extensions directory
+ (note: this can be in both, user and system locations!) */
+ LOCATION_INX, /**< Look relative to the inx file's location */
+ LOCATION_ABSOLUTE, /**< This dependency is already defined in absolute terms */
+ LOCATION_CNT /**< Number of locations to look */
+ };
+
+private:
+ static constexpr const char *UNCHECKED = "---unchecked---";
+
+ /** \brief The XML representation of the dependency. */
+ Inkscape::XML::Node * _repr;
+ /** \brief The string that is in the XML tags pulled out. */
+ const gchar * _string = nullptr;
+ /** \brief The description of the dependency for the users. */
+ const gchar * _description = nullptr;
+ /** \brief The absolute path to the dependency file determined while checking this dependency. */
+ std::string _absolute_location = UNCHECKED;
+
+ /** \brief Storing the type of this particular dependency. */
+ type_t _type = TYPE_FILE;
+ /** \brief The location to look for this particular dependency. */
+ location_t _location = LOCATION_PATH;
+
+ /** \brief Strings to represent the different enum values in
+ \c type_t in the XML */
+ static gchar const * _type_str[TYPE_CNT];
+ /** \brief Strings to represent the different enum values in
+ \c location_t in the XML */
+ static gchar const * _location_str[LOCATION_CNT];
+
+ /** \brief Reference to the extension requesting this dependency. */
+ const Extension *_extension;
+
+public:
+ Dependency (Inkscape::XML::Node *in_repr, const Extension *extension, type_t type=TYPE_FILE);
+ virtual ~Dependency ();
+ bool check();
+ const gchar* get_name();
+ std::string get_path();
+
+ Glib::ustring info_string();
+}; /* class Dependency */
+
+
+} } /* namespace Extension, Inkscape */
+
+#endif /* INKSCAPE_EXTENSION_DEPENDENCY_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 :