windowrules: rewrite completely (#12269)

Reworks the window rule syntax completely

---------

Co-authored-by: Mihai Fufezan <mihai@fufexan.net>

1 files changed, 22 insertions, 0 deletions

diff --git a/src/helpers/math/Expression.cpp b/src/helpers/math/Expression.cpp
new file mode 100644
index 00000000..fb28628d
--- /dev/null
+++ b/src/helpers/math/Expression.cpp
@@ -0,0 +1,22 @@
+#include "Expression.hpp"
+#include "muParser.h"
+#include "../../debug/Log.hpp"
+
+using namespace Math;
+
+CExpression::CExpression() : m_parser(makeUnique<mu::Parser>()) {
+    ;
+}
+
+void CExpression::addVariable(const std::string& name, double val) {
+    m_parser->DefineConst(name, val);
+}
+
+std::optional<double> CExpression::compute(const std::string& expr) {
+    try {
+        m_parser->SetExpr(expr);
+        return m_parser->Eval();
+    } catch (mu::Parser::exception_type& e) { Debug::log(ERR, "CExpression::compute: mu threw: {}", e.GetMsg()); }
+
+    return std::nullopt;
+}