1 files changed, 134 insertions, 0 deletions
diff --git a/src/util/enums.h b/src/util/enums.h
new file mode 100644
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+++ b/src/util/enums.h
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+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Authors:
+ *   Nicholas Bishop <nicholasbishop@gmail.com>
+ *   Johan Engelen <j.b.c.engelen@ewi.utwente.nl>
+ *
+ * Copyright (C) 2007 Authors
+ *
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+#ifndef INKSCAPE_UTIL_ENUMS_H
+#define INKSCAPE_UTIL_ENUMS_H
+
+#include <glibmm/ustring.h>
+
+namespace Inkscape {
+namespace Util {
+
+/**
+ * Simplified management of enumerations of svg items with UI labels.
+ * IMPORTANT:
+ *  When initializing the EnumData struct, you cannot use _(...) to translate strings.
+ * Instead, one must use N_(...) and do the translation every time the string is retrieved.
+ */
+template<typename E>
+struct EnumData
+{
+    E id;
+    const Glib::ustring label;
+    const Glib::ustring key;
+};
+
+const Glib::ustring empty_string("");
+
+/**
+ * Simplified management of enumerations of svg items with UI labels.
+ *
+ * @note that get_id_from_key and get_id_from_label return 0 if it cannot find an entry for that key string.
+ * @note that get_label and get_key return an empty string when the requested id is not in the list.
+ */
+template<typename E> class EnumDataConverter
+{
+public:
+    typedef EnumData<E> Data;
+
+    EnumDataConverter(const EnumData<E>* cd, const unsigned int length)
+        : _length(length), _data(cd)
+    {}
+
+    E get_id_from_label(const Glib::ustring& label) const
+    {
+        for(unsigned int i = 0; i < _length; ++i) {
+            if(_data[i].label == label)
+                return _data[i].id;
+        }
+
+        return (E)0;
+    }
+
+    E get_id_from_key(const Glib::ustring& key) const
+    {
+        for(unsigned int i = 0; i < _length; ++i) {
+            if(_data[i].key == key)
+                return _data[i].id;
+        }
+
+        return (E)0;
+    }
+
+    bool is_valid_key(const Glib::ustring& key) const
+    {
+        for(unsigned int i = 0; i < _length; ++i) {
+            if(_data[i].key == key)
+                return true;
+        }
+
+        return false;
+    }
+
+    bool is_valid_id(const E id) const
+    {
+        for(unsigned int i = 0; i < _length; ++i) {
+            if(_data[i].id == id)
+                return true;
+        }
+        return false;
+    }
+
+    const Glib::ustring& get_label(const E id) const
+    {
+        for(unsigned int i = 0; i < _length; ++i) {
+            if(_data[i].id == id)
+                return _data[i].label;
+        }
+
+        return empty_string;
+    }
+
+    const Glib::ustring& get_key(const E id) const
+    {
+        for(unsigned int i = 0; i < _length; ++i) {
+            if(_data[i].id == id)
+                return _data[i].key;
+        }
+
+        return empty_string;
+    }
+
+    const EnumData<E>& data(const unsigned int i) const
+    {
+        return _data[i];
+    }
+
+    const unsigned int _length;
+private:
+    const EnumData<E>* _data;
+};
+
+
+}
+}
+
+#endif
+
+/*
+  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:fileencoding=utf-8:textwidth=99 :