1 files changed, 87 insertions, 0 deletions
diff --git a/src/svg/svg-length.h b/src/svg/svg-length.h
new file mode 100644
index 0000000..27f534f
--- /dev/null
+++ b/src/svg/svg-length.h
@@ -0,0 +1,87 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/**
+ * Authors:
+ *   Lauris Kaplinski <lauris@kaplinski.com>
+ *   Carl Hetherington <inkscape@carlh.net>
+ *
+ * Copyright (C) 1999-2002 Lauris Kaplinski
+ * Copyright (C) 2000-2001 Ximian, Inc.
+ *
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+#ifndef SEEN_SP_SVG_LENGTH_H
+#define SEEN_SP_SVG_LENGTH_H
+
+#include <string>
+
+/**
+ *  SVG length type
+ */
+class SVGLength {
+public:
+    SVGLength();
+
+    enum Unit {
+        NONE,
+        PX,
+        PT,
+        PC,
+        MM,
+        CM,
+        INCH,
+        EM,
+        EX,
+        PERCENT,
+        LAST_UNIT = PERCENT
+    };
+
+    // The object's value is valid / exists in SVG.
+    bool _set;
+
+    // The unit of value.
+    Unit unit;
+
+    // The value of this SVGLength as found in the SVG.
+    float value;
+
+    // The value in pixels (value * pixels/unit).
+    float computed;
+
+    float operator=(float v) {
+        _set = true;
+        unit = NONE;
+        value = computed = v;
+        return v;
+    }
+
+    bool read(char const *str);
+    void readOrUnset(char const *str, Unit u = NONE, float v = 0, float c = 0);
+    bool readAbsolute(char const *str);
+    std::string getUnit() const;
+    bool isAbsolute();
+
+    std::string write() const;
+    // To set 'v' use '='
+    void set(Unit u, float v); // Sets computed value based on u and v.
+    void set(Unit u, float v, float c); // Sets all three values.
+    void unset(Unit u = NONE, float v = 0, float c = 0);
+    void scale(double scale); // Scales length (value, computed), leaving unit alone.
+    void update(double em, double ex, double scale); // Updates computed value
+};
+
+char const *sp_svg_length_get_css_units(SVGLength::Unit unit);
+bool svg_length_absolute_unit(SVGLength::Unit unit);
+
+#endif // SEEN_SP_SVG_LENGTH_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:fileencoding=utf-8 :