[Calculator Runner] Port non-Qalculate codepath from QtScript to QtQml

QtScript is deprecated and at least in this place it's a straight-forward port.
The Qalculate code path also doesn't need it, so remove it from CMake there.

Differential Revision: https://phabricator.kde.org/D4472

runners/calculator/CMakeLists.txt

@@ -33,7 +33,6 @@ if ( QALCULATE_FOUND )
                           KF5::Runner
                           KF5::I18n
                           Qt5::Network
-                          Qt5::Script
                           Qt5::Widgets
     )
 else ()
@@ -42,7 +41,7 @@ else ()
                           KF5::Runner
                           KF5::I18n
                           Qt5::Gui
-                          Qt5::Script
+                          Qt5::Qml
     )
 endif ()
 

runners/calculator/calculatorrunner.cpp

@@ -24,7 +24,7 @@
 #ifdef ENABLE_QALCULATE
 #include "qalculate_engine.h"
 #else
-#include <QScriptEngine>
+#include <QJSEngine>
 #include <QGuiApplication>
 #include <QClipboard>
 #endif
@@ -292,8 +292,8 @@ QString CalculatorRunner::calculate(const QString& term)
     return result.replace('.', QLocale().decimalPoint(), Qt::CaseInsensitive);
     #else
     //qDebug() << "calculating" << term;
-    QScriptEngine eng;
-    QScriptValue result = eng.evaluate(" var result ="+term+"; result");
+    QJSEngine eng;
+    QJSValue result = eng.evaluate(QStringLiteral("var result = %1; result").arg(term));
 
     if (result.isError()) {
         return QString();