ProjectExplorer: Enable to easily check if a project has dirty files

Task-number: QDS-4241
Change-Id: I2fec5f411cdff9fabfa31bbd73971c0308df0783
Reviewed-by: Michael Winkelmann <michael.winkelmann@qt.io>
Reviewed-by: Christian Kandeler <christian.kandeler@qt.io>

src/plugins/projectexplorer/project.cpp

@@ -49,6 +49,7 @@
 #include <coreplugin/icore.h>
 #include <coreplugin/iversioncontrol.h>
 #include <coreplugin/vcsmanager.h>
+#include <coreplugin/editormanager/documentmodel.h>
 
 #include <projectexplorer/buildmanager.h>
 #include <projectexplorer/kitmanager.h>
@@ -1061,6 +1062,23 @@ QStringList Project::availableQmlPreviewTranslations(QString *errorMessage)
     });
 }
 
+QList<Core::IDocument *> Project::modifiedDocuments() const
+{
+    QList<Core::IDocument *> modifiedProjectDocuments;
+
+    for (Core::IDocument *doc : Core::DocumentModel::openedDocuments()) {
+        if (doc->isModified() && isKnownFile(doc->filePath()))
+            modifiedProjectDocuments.append(doc);
+    }
+
+    return modifiedProjectDocuments;
+}
+
+bool Project::isModified() const
+{
+    return !modifiedDocuments().isEmpty();
+}
+
 #if defined(WITH_TESTS)
 
 } // namespace ProjectExplorer