port the webview page away from QtWebkit

it is no longer maintained upstream
this change is tested with QtWebEngine 5.6.0, it builds and runs
displays the webview page correctly, clicking next however does not refresh that new page completely

src/modules/webview/CMakeLists.txt

@@ -1,7 +1,7 @@
-find_package( Qt5 ${QT_VERSION} CONFIG REQUIRED WebKit WebKitWidgets )
+find_package( Qt5 ${QT_VERSION} CONFIG REQUIRED WebEngine WebEngineWidgets )
 
 include_directories( ${PROJECT_BINARY_DIR}/src/libcalamaresui
-                     ${QT_QTWEBKIT_INCLUDE_DIR} )
+                     ${QT_QTWEBENGINE_INCLUDE_DIR} )
 
 set( CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH}
                        ${CMAKE_CURRENT_SOURCE_DIR}/CMakeModules )
@@ -14,7 +14,7 @@ calamares_add_plugin( webview
         WebViewStep.cpp
     LINK_LIBRARIES
         calamaresui
-        Qt5::WebKit
-        Qt5::WebKitWidgets
+        Qt5::WebEngine
+        Qt5::WebEngineWidgets
     SHARED_LIB
 )

src/modules/webview/WebViewStep.cpp

@@ -19,7 +19,7 @@
 #include "WebViewStep.h"
 
 #include <QVariant>
-#include <QWebView>
+#include <QWebEngineView>
 
 CALAMARES_PLUGIN_FACTORY_DEFINITION( WebViewStepFactory, registerPlugin<WebViewStep>(); )
 
@@ -27,7 +27,7 @@ WebViewStep::WebViewStep( QObject* parent )
     : Calamares::ViewStep( parent )
 {
     emit nextStatusChanged( true );
-    m_view = new QWebView;
+    m_view = new QWebEngineView;
 }
 
 

src/modules/webview/WebViewStep.h

@@ -28,7 +28,7 @@
 
 #include <QVariantMap>
 
-class QWebView;
+class QWebEngineView;
 
 class PLUGINDLLEXPORT WebViewStep : public Calamares::ViewStep
 {
@@ -57,7 +57,7 @@ public:
     void setConfigurationMap( const QVariantMap& configurationMap ) override;
 
 private:
-    QWebView *m_view;
+    QWebEngineView *m_view;
     QString m_url;
     QString m_prettyName;
 };