1 files changed, 45 insertions, 0 deletions
diff --git a/include/svtools/filechangedchecker.hxx b/include/svtools/filechangedchecker.hxx
new file mode 100644
index 000000000..d50fea631
--- /dev/null
+++ b/include/svtools/filechangedchecker.hxx
@@ -0,0 +1,45 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#pragma once
+
+#include <svtools/svtdllapi.h>
+
+#include <osl/time.h>
+#include <rtl/ustring.hxx>
+#include <vcl/timer.hxx>
+
+#include <functional>
+
+/** Periodically checks if a file has been modified
+
+    Instances of this class setup a vcl timer to occasionally wake up
+    check whether file modification time has changed.
+ */
+class SVT_DLLPUBLIC FileChangedChecker
+{
+private:
+    Timer                    mTimer;
+    OUString                 mFileName;
+    TimeValue                mLastModTime;
+    ::std::function<void ()> mpCallback;
+
+    bool SVT_DLLPRIVATE getCurrentModTime(TimeValue& o_rValue) const;
+    DECL_DLLPRIVATE_LINK(TimerHandler, Timer *, void);
+
+public:
+    void resetTimer();
+    // bUpdate = true  when file has changed, get the return and the object get the new time
+    //         = false when file has changed, only get the return, not change the object
+    bool hasFileChanged(bool bUpdate = true);
+    FileChangedChecker(const OUString& rFilename,
+            const ::std::function<void ()>& rCallback);
+    // without Timer function
+    FileChangedChecker(const OUString& rFilename);
+};