Use QtWebEngine on Qt >= 5.6.0 and QtWebKit otherwise.

src/modules/webview/CMakeLists.txt

@@ -1,11 +1,42 @@
-find_package( Qt5 ${QT_VERSION} CONFIG REQUIRED WebEngine WebEngineWidgets )
+list( APPEND CALA_WEBVIEW_INCLUDE_DIRECTORIES
+    ${PROJECT_BINARY_DIR}/src/libcalamaresui
+)
+list( APPEND CALA_WEBVIEW_LINK_LIBRARIES
+    calamaresui
+)
+
+
+if ( ${QT_VERSION} VERSION_LESS 5.6.0 )
+    find_package( Qt5 ${QT_VERSION} CONFIG REQUIRED WebKit WebKitWidgets )
+
+    list( APPEND CALA_WEBVIEW_INCLUDE_DIRECTORIES
+        ${QT_QTWEBKIT_INCLUDE_DIR}
+    )
+    list( APPEND CALA_WEBVIEW_LINK_LIBRARIES
+        Qt5::WebKit
+        Qt5::WebKitWidgets
+    )
+    set( WEBVIEW_WITH_WEBKIT 1 )
+else()
+    find_package( Qt5 ${QT_VERSION} CONFIG REQUIRED WebEngine WebEngineWidgets )
 
-include_directories( ${PROJECT_BINARY_DIR}/src/libcalamaresui
+    list( APPEND CALA_WEBVIEW_INCLUDE_DIRECTORIES
-                     ${QT_QTWEBENGINE_INCLUDE_DIR} )
+        ${QT_QTWEBENGINE_INCLUDE_DIR}
+    )
+    list( APPEND CALA_WEBVIEW_LINK_LIBRARIES
+        Qt5::WebEngine
+        Qt5::WebEngineWidgets
+    )
+    set( WEBVIEW_WITH_WEBENGINE 1 )
+endif()
+
+include_directories( ${CALA_WEBVIEW_INCLUDE_DIRECTORIES} )
 
 set( CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH}
                        ${CMAKE_CURRENT_SOURCE_DIR}/CMakeModules )
 
+configure_file( ${CMAKE_CURRENT_SOURCE_DIR}/WebViewConfig.h.in
+                ${CMAKE_CURRENT_BINARY_DIR}/WebViewConfig.h )
 
 calamares_add_plugin( webview
     TYPE viewmodule
@@ -13,8 +44,6 @@ calamares_add_plugin( webview
     SOURCES
         WebViewStep.cpp
     LINK_LIBRARIES
-        calamaresui
+        ${CALA_WEBVIEW_LINK_LIBRARIES}
-        Qt5::WebEngine
-        Qt5::WebEngineWidgets
     SHARED_LIB
 )

src/modules/webview/WebViewConfig.h.in

@@ -0,0 +1,7 @@
+#ifndef CALAMARESWEBVIEWCONFIG_H
+#define CALAMARESWEBVIEWCONFIG_H
+
+#cmakedefine WEBVIEW_WITH_WEBENGINE
+#cmakedefine WEBVIEW_WITH_WEBKIT
+
+#endif // CALAMARESWEBVIEWCONFIG_H

src/modules/webview/WebViewStep.cpp

@@ -1,6 +1,7 @@
 /* === This file is part of Calamares - <http://github.com/calamares> ===
  *
  *   Copyright 2015, Rohan Garg <rohan@garg.io>
+ *   Copyright 2016, Teo Mrnjavac <teo@kde.org>
  *
  *   Calamares is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -19,7 +20,12 @@
 #include "WebViewStep.h"
 
 #include <QVariant>
+
+#ifdef WEBVIEW_WITH_WEBKIT
+#include <QWebView>
+#else
 #include <QWebEngineView>
+#endif
 
 CALAMARES_PLUGIN_FACTORY_DEFINITION( WebViewStepFactory, registerPlugin<WebViewStep>(); )
 
@@ -27,7 +33,7 @@ WebViewStep::WebViewStep( QObject* parent )
     : Calamares::ViewStep( parent )
 {
     emit nextStatusChanged( true );
-    m_view = new QWebEngineView;
+    m_view = new C_QWEBVIEW();
 }
 
 

src/modules/webview/WebViewStep.h

@@ -1,6 +1,7 @@
 /* === This file is part of Calamares - <http://github.com/calamares> ===
  *
  *   Copyright 2015, Rohan Garg <rohan@garg.io>
+ *   Copyright 2016, Teo Mrnjavac <teo@kde.org>
  *
  *   Calamares is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -19,7 +20,7 @@
 #ifndef WEBVIEWPLUGIN_H
 #define WEBVIEWPLUGIN_H
 
-#include <QObject>
+#include "WebViewConfig.h"
 
 #include <utils/PluginFactory.h>
 #include <viewpages/ViewStep.h>
@@ -28,7 +29,13 @@
 
 #include <QVariantMap>
 
-class QWebEngineView;
+#ifdef WEBVIEW_WITH_WEBKIT
+#define C_QWEBVIEW QWebView
+#else
+#define C_QWEBVIEW QWebEngineView
+#endif
+
+class C_QWEBVIEW;
 
 class PLUGINDLLEXPORT WebViewStep : public Calamares::ViewStep
 {
@@ -57,7 +64,7 @@ public:
     void setConfigurationMap( const QVariantMap& configurationMap ) override;
 
 private:
-    QWebEngineView *m_view;
+    C_QWEBVIEW *m_view;
     QString m_url;
     QString m_prettyName;
 };