1 files changed, 98 insertions, 0 deletions
diff --git a/src/extension/dependency.h b/src/extension/dependency.h
new file mode 100644
index 0000000..e2c2791
--- /dev/null
+++ b/src/extension/dependency.h
@@ -0,0 +1,98 @@
+// 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 :