1 files changed, 69 insertions, 0 deletions
diff --git a/src/svg/svg-box.h b/src/svg/svg-box.h
new file mode 100644
index 0000000..7cc1853
--- /dev/null
+++ b/src/svg/svg-box.h
@@ -0,0 +1,69 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+#ifndef SEEN_SP_SVG_BOX_H
+#define SEEN_SP_SVG_BOX_H
+/*
+ * Authors:
+ *   Martin Owens <doctormo@geek-2.com>
+ *
+ * Copyright (C) 2022 Martin Owens
+ *
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+#include <glib.h>
+#include <optional>
+#include "svg/svg-length.h"
+
+enum BoxSide {
+    BOX_TOP,
+    BOX_RIGHT,
+    BOX_BOTTOM,
+    BOX_LEFT
+};
+
+class SVGBox {
+public:
+    SVGBox();
+
+    bool read(const std::string &value);
+    void unset();
+    void readOrUnset(gchar const *str);
+    void update(double em, double ex, double width, double height);
+
+    operator bool() const { return _is_set; }
+
+    std::string write() const;
+    std::string toString(const std::string &unit, std::optional<unsigned int> precision = {}, bool add_unit = true) const;
+    bool fromString(const std::string &value, const std::string &unit);
+    bool fromString(BoxSide side, const std::string &value, const std::string &unit);
+    bool isZero() const;
+
+    void set(BoxSide side, double value, bool confine = false);
+    void set(double top, double right, double bottom, double left);
+    void set(double top, double horz, double bottom) { set(top, horz, bottom, horz); }
+    void set(double vert, double horz)               { set(vert, horz, vert, horz);  }
+    void set(double size)                            { set(size, size, size, size);  }
+
+    double get(BoxSide side) const { return _value[side].computed; }
+    SVGLength top() const { return _value[BOX_TOP]; }
+    SVGLength right() const { return _value[BOX_RIGHT] ? _value[BOX_RIGHT] : top(); }
+    SVGLength bottom() const { return _value[BOX_BOTTOM] ? _value[BOX_BOTTOM] : top(); }
+    SVGLength left() const { return _value[BOX_LEFT] ? _value[BOX_LEFT] : right(); }
+private:
+    bool _is_set = false;
+    
+    SVGLength _value[4];
+};
+
+#endif // SEEN_SP_SVG_BOX_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:textwidth=99 :