Fix build with Qt6

Add missing includes for "incomplete type" issues.
Remove usage of QDesktopWidget.
Don't compile native WebKit help backend (missing native widget integration).
Add SvgWidget dependency.

Task-number: QTCREATORBUG-24098
Change-Id: I1b3afb54d385940ff283824870fa7454866212a4
Reviewed-by: Christian Stenger <christian.stenger@qt.io>

src/libs/qmljs/qmljsdialect.h

@@ -29,6 +29,7 @@
 
 #include <utils/fileutils.h>
 
+#include <QDebug>
 #include <QString>
 
 namespace QmlJS {

src/plugins/cpptools/cppcodestylesettingspage.cpp

@@ -36,6 +36,7 @@
 #include <coreplugin/icore.h>
 #include <cppeditor/cppeditorconstants.h>
 #include <texteditor/codestyleeditor.h>
+#include <texteditor/fontsettings.h>
 #include <texteditor/icodestylepreferencesfactory.h>
 #include <texteditor/textdocument.h>
 #include <texteditor/displaysettings.h>

src/plugins/help/CMakeLists.txt

@@ -32,7 +32,7 @@ extend_qtc_plugin(Help
 )
 
 extend_qtc_plugin(Help
-  CONDITION FWWebKit AND FWAppKit
+  CONDITION FWWebKit AND FWAppKit AND Qt5_VERSION VERSION_LESS 6.0.0
   FEATURE_INFO "Native WebKit help viewer"
   DEPENDS ${FWWebKit} ${FWAppKit}
   DEFINES QTC_MAC_NATIVE_HELPVIEWER

src/plugins/imageviewer/CMakeLists.txt

@@ -1,5 +1,10 @@
+find_package(Qt5 COMPONENTS SvgWidgets QUIET)
+if (TARGET Qt5::SvgWidgets)
+  set(SVG_WIDGETS Qt5::SvgWidgets)
+endif()
+
 add_qtc_plugin(ImageViewer
-  DEPENDS OptionalSvg
+  DEPENDS OptionalSvg ${SVG_WIDGETS}
   PLUGIN_DEPENDS Core
   SOURCES
     exportdialog.cpp exportdialog.h

src/plugins/projectexplorer/editorsettingspropertiespage.cpp

@@ -26,7 +26,12 @@
 #include "editorsettingspropertiespage.h"
 #include "editorconfiguration.h"
 #include "project.h"
+
+#include <texteditor/behaviorsettings.h>
+#include <texteditor/extraencodingsettings.h>
 #include <texteditor/marginsettings.h>
+#include <texteditor/storagesettings.h>
+#include <texteditor/typingsettings.h>
 
 #include <QTextCodec>
 

src/plugins/qmldesigner/components/previewtooltip/previewtooltipbackend.cpp

@@ -31,7 +31,6 @@
 #include <imagecache.h>
 
 #include <QApplication>
-#include <QDesktopWidget>
 #include <QMetaObject>
 
 namespace QmlDesigner {
@@ -65,8 +64,7 @@ void PreviewTooltipBackend::showTooltip()
         },
         [] {});
 
-    auto desktopWidget = QApplication::desktop();
-    auto mousePosition = desktopWidget->cursor().pos();
+    auto mousePosition = QCursor::pos();
 
     mousePosition += {20, 20};
     m_tooltip->move(mousePosition);

src/plugins/qmljstools/qmljscodestylesettingspage.cpp

@@ -30,6 +30,7 @@
 #include "qmljsindenter.h"
 #include "qmljsqtstylecodeformatter.h"
 
+#include <texteditor/fontsettings.h>
 #include <texteditor/snippets/snippetprovider.h>
 #include <texteditor/tabsettings.h>
 #include <texteditor/simplecodestylepreferences.h>

src/plugins/texteditor/snippets/snippetssettingspage.cpp

@@ -32,6 +32,7 @@
 #include "ui_snippetssettingspage.h"
 
 #include <coreplugin/icore.h>
+#include <texteditor/fontsettings.h>
 #include <texteditor/textdocument.h>
 #include <texteditor/texteditorconstants.h>
 #include <texteditor/texteditorsettings.h>