1 files changed, 59 insertions, 0 deletions
diff --git a/src/data/graphelementproperty.cpp b/src/data/graphelementproperty.cpp
new file mode 100644
index 0000000..a50af58
--- /dev/null
+++ b/src/data/graphelementproperty.cpp
@@ -0,0 +1,59 @@
+#include "graphelementproperty.h"
+
+#include <QRegExp>
+
+GraphElementProperty::GraphElementProperty ():
+    _key(""), _value(""), _atom(false), _keyMatch(false)
+{}
+
+GraphElementProperty::GraphElementProperty(QString key, QString value, bool atom, bool keyMatch) :
+    _key(key), _value(value), _atom(atom), _keyMatch(keyMatch)
+{}
+
+GraphElementProperty::GraphElementProperty(QString key, QString value) :
+    _key(key), _value(value), _atom(false), _keyMatch(false)
+{}
+
+GraphElementProperty::GraphElementProperty(QString key, bool keyMatch) :
+    _key(key), _value(""), _atom(!keyMatch), _keyMatch(keyMatch)
+{}
+
+QString GraphElementProperty::key() const
+{ return _key; }
+
+QString GraphElementProperty::value() const
+{ return _value; }
+
+void GraphElementProperty::setValue(const QString &value)
+{ _value = value; }
+
+bool GraphElementProperty::atom() const
+{ return _atom; }
+
+bool GraphElementProperty::keyMatch() const
+{ return _keyMatch; }
+
+bool GraphElementProperty::matches(const GraphElementProperty &p)
+{
+    if (p.atom()) return _atom && _key == p.key();
+    if (p.keyMatch()) return !_atom && _key == p.key();
+    if (_keyMatch) return !p.atom() && _key == p.key();
+    return !_atom && _key == p.key() && _value == p.value();
+}
+
+bool GraphElementProperty::operator==(const GraphElementProperty &p)
+{
+    return matches(p);
+}
+
+QString GraphElementProperty::tikzEscape(QString str)
+{
+    QRegExp re("[0-9a-zA-Z<> \\-'.]*");
+    if (re.exactMatch(str)) return str;
+    else return "{" + str + "}";
+}
+
+QString GraphElementProperty::tikz() {
+    if (_atom) return tikzEscape(_key);
+    return tikzEscape(_key) + "=" + tikzEscape(_value);
+}