Move IEditor::isTemporary to IDocument

It's a property of the document implementation, not of the specific
editor instance working on it.

Change-Id: I5c3dd054e21b646e2d94b891916a096d045923f8
Reviewed-by: hjk <hjk121@nokiamail.com>
Reviewed-by: Eike Ziller <eike.ziller@digia.com>

src/plugins/coreplugin/idocument.cpp

@@ -43,7 +43,11 @@
 
 namespace Core {
 
-IDocument::IDocument(QObject *parent) : QObject(parent), m_infoBar(0), m_hasWriteWarning(false), m_restored(false)
+IDocument::IDocument(QObject *parent) : QObject(parent),
+    m_temporary(false),
+    m_infoBar(0),
+    m_hasWriteWarning(false),
+    m_restored(false)
 {
 }
 
@@ -78,6 +82,25 @@ bool IDocument::isFileReadOnly() const
     return !QFileInfo(filePath()).isWritable();
 }
 
+/*!
+    Returns if the document is a temporary that should for example not be considered
+    when saving/restoring the session state, recent files, etc. Defaults to false.
+    \sa setTemporary()
+*/
+bool IDocument::isTemporary() const
+{
+    return m_temporary;
+}
+
+/*!
+    Sets if the document is \a temporary.
+    \sa isTemporary()
+*/
+void IDocument::setTemporary(bool temporary)
+{
+    m_temporary = temporary;
+}
+
 bool IDocument::autoSave(QString *errorString, const QString &fileName)
 {
     if (!save(errorString, fileName, true))