add macro wrap for QXmlStream related code

To fix a compile error when QXmlStream is removed by defining macro,
but it is still used in some files.

Change-Id: I776c799732212b7401767440448248fc7b5dc480
Reviewed-by: David Faure <faure@kde.org>

src/corelib/mimetypes/qmimeprovider.cpp

@@ -529,6 +529,10 @@ QList<QMimeType> QMimeBinaryProvider::allMimeTypes()
 
 void QMimeBinaryProvider::loadMimeTypePrivate(QMimeTypePrivate &data)
 {
+#ifdef QT_NO_XMLSTREAMREADER
+    qWarning() << "Cannot load mime type since QXmlStreamReader is not available.";
+    return;
+#else
     if (data.loaded)
         return;
     data.loaded = true;
@@ -618,6 +622,7 @@ void QMimeBinaryProvider::loadMimeTypePrivate(QMimeTypePrivate &data)
         // But is this really worth the effort?
     }
 #endif
+#endif //QT_NO_XMLSTREAMREADER
 }
 
 // Binary search in the icons or generic-icons list

src/corelib/mimetypes/qmimetypeparser.cpp

@@ -174,6 +174,7 @@ static bool parseNumber(const QString &n, int *target, QString *errorMessage)
 // Evaluate a magic match rule like
 //  <match value="must be converted with BinHex" type="string" offset="11"/>
 //  <match value="0x9501" type="big16" offset="0:64"/>
+#ifndef QT_NO_XMLSTREAMREADER
 static bool createMagicMatchRule(const QXmlStreamAttributes &atts,
                                  QString *errorMessage, QMimeMagicRule *&rule)
 {
@@ -202,9 +203,15 @@ static bool createMagicMatchRule(const QXmlStreamAttributes &atts,
 
     return true;
 }
+#endif
 
 bool QMimeTypeParserBase::parse(QIODevice *dev, const QString &fileName, QString *errorMessage)
 {
+#ifdef QT_NO_XMLSTREAMREADER
+    if (errorMessage)
+        *errorMessage = QString::fromLatin1("QXmlStreamReader is not available, cannot parse.");
+    return false;
+#else
     QMimeTypePrivate data;
     int priority = 50;
     QStack<QMimeMagicRule *> currentRules; // stack for the nesting of rules
@@ -338,6 +345,7 @@ bool QMimeTypeParserBase::parse(QIODevice *dev, const QString &fileName, QString
     }
 
     return true;
+#endif //QT_NO_XMLSTREAMREADER
 }
 
 QT_END_NAMESPACE