QmlDesigner.Model: allowing some diagnostics for exceptions

Setting QTCREATOR_QTQUICKDESIGNER_WARN_EXCEPTION will give detailed
information about any exception thrown.

Change-Id: Ia11b98324e6f0c27e086778ddcb1afec67d92e6a
Reviewed-by: Marco Bubke <marco.bubke@digia.com>
Reviewed-by: Thomas Hartmann <Thomas.Hartmann@digia.com>

src/plugins/qmldesigner/designercore/exceptions/exception.cpp

@@ -84,6 +84,12 @@ bool Exception::shouldAssert()
     return s_shouldAssert;
 }
 
+bool Exception::warnAboutException()
+{
+    static bool warnException = !qgetenv("QTCREATOR_QTQUICKDESIGNER_WARN_EXCEPTION").isEmpty();
+    return warnException;
+}
+
 /*!
     Constructs an exception. \a line uses the __LINE__ macro, \a function uses
     the __FUNCTION__ or the Q_FUNC_INFO macro, and \a file uses
@@ -125,6 +131,12 @@ QString Exception::backTrace() const
     return m_backTrace;
 }
 
+void Exception::createWarning() const
+{
+    if (warnAboutException())
+        qDebug() << *this;
+}
+
 /*!
     Returns the optional description of this exception as a string.
 */

src/plugins/qmldesigner/designercore/exceptions/invalidargumentexception.cpp

@@ -50,7 +50,7 @@ InvalidArgumentException::InvalidArgumentException(int line,
                                                    const QString &argument)
  : Exception(line, function, file), m_argument(argument)
 {
-
+    createWarning();
 }
 
 QString InvalidArgumentException::description() const

src/plugins/qmldesigner/designercore/exceptions/invalididexception.cpp

@@ -56,6 +56,7 @@ InvalidIdException::InvalidIdException(int line,
     m_id(id),
     m_description(description)
 {
+    createWarning();
 }
 
 QString InvalidIdException::type() const

src/plugins/qmldesigner/designercore/exceptions/invalidmetainfoexception.cpp

@@ -48,6 +48,7 @@ InvalidMetaInfoException::InvalidMetaInfoException(int line,
                                                            const QString &file)
  : Exception(line, function, file)
 {
+    createWarning();
 }
 
 /*!

src/plugins/qmldesigner/designercore/exceptions/invalidmodelnodeexception.cpp

@@ -48,6 +48,7 @@ InvalidModelNodeException::InvalidModelNodeException(int line,
                                                      const QString &file)
  : Exception(line, function, file)
 {
+    createWarning();
 }
 
 /*!

src/plugins/qmldesigner/designercore/exceptions/invalidmodelstateexception.cpp

@@ -49,6 +49,7 @@ InvalidModelStateException::InvalidModelStateException(int line,
                                                        const QString &file)
   : Exception(line, function, file)
 {
+    createWarning();
 }
 
 /*!

src/plugins/qmldesigner/designercore/exceptions/invalidpropertyexception.cpp

@@ -48,6 +48,7 @@ InvalidPropertyException::InvalidPropertyException(int line,
                                                    const QString &argument)
  : Exception(line, function, file), m_argument(argument)
 {
+    createWarning();
 }
 
 /*!

src/plugins/qmldesigner/designercore/exceptions/invalidqmlsourceexception.cpp

@@ -49,6 +49,7 @@ InvalidQmlSourceException::InvalidQmlSourceException(int line,
  :  Exception(line, function, file),
     m_qmlSource(qmlSource)
 {
+    createWarning();
 }
 
 /*!

src/plugins/qmldesigner/designercore/exceptions/invalidreparentingexception.cpp

@@ -47,6 +47,7 @@ InvalidReparentingException::InvalidReparentingException(int line,
                                                          const QString &file)
  : Exception(line, function, file)
 {
+    createWarning();
 }
 
 /*!

src/plugins/qmldesigner/designercore/exceptions/invalidslideindexexception.cpp

@@ -48,6 +48,7 @@ InvalidSlideIndexException::InvalidSlideIndexException(int line,
                                                        const QString &file)
   : Exception(line, function, file)
 {
+    createWarning();
 }
 
 /*!

src/plugins/qmldesigner/designercore/exceptions/modificationgroupexception.cpp

@@ -47,6 +47,7 @@ ModificationGroupException::ModificationGroupException(int line,
                                                    const QString &file)
  : Exception(line, function, file)
 {
+    createWarning();
 }
 
 /*!

src/plugins/qmldesigner/designercore/exceptions/removebasestateexception.cpp

@@ -48,6 +48,7 @@ RemoveBaseStateException::RemoveBaseStateException(int line,
                                              const QString &file)
   : Exception(line, function, file)
 {
+    createWarning();
 }
 
 /*!

src/plugins/qmldesigner/designercore/exceptions/rewritingexception.cpp

@@ -38,6 +38,7 @@ RewritingException::RewritingException(int line,
                                        const QString &documentTextContent):
         Exception(line, function, file), m_description(description), m_documentTextContent(documentTextContent)
 {
+    createWarning();
 }
 
 QString RewritingException::type() const

src/plugins/qmldesigner/designercore/include/exception.h

@@ -53,8 +53,11 @@ public:
     QString file() const;
     QString backTrace() const;
 
+    void createWarning() const;
+
     static void setShouldAssert(bool assert);
     static bool shouldAssert();
+    static bool warnAboutException();
 
 private:
     int m_line;