tdf#101302: Add option to clear unavailable files in menu/start center

This patch adresses tdf#101302. It essentially adds a menu item to clear
unavailable files from the menu and start center. Previously, they were
visible as recent documents in the menu and start center, and caused
error when selected.

Change-Id: I55ee9f663b24c343a90817c438aff11d9230061c
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/120480
Tested-by: Jenkins
Reviewed-by: Hossein <hossein@libreoffice.org>

sfx2/inc/recentdocsview.hxx

@@ -80,6 +80,8 @@ public:
     // received on load of recently used file
     void DispatchedLoadRecentUsedFile();
 
+    void clearUnavailableFiles();
+
 private:
     virtual bool MouseButtonDown( const MouseEvent& rMEvt ) override;
 

sfx2/source/control/recentdocsview.cxx

@@ -18,6 +18,7 @@
  */
 
 #include <sal/log.hxx>
+#include <comphelper/DirectoryHelper.hxx>
 #include <recentdocsview.hxx>
 #include <sfx2/sfxresid.hxx>
 #include <unotools/historyoptions.hxx>
@@ -173,6 +174,18 @@ void RecentDocsView::Reload()
     Invalidate();
 }
 
+void RecentDocsView::clearUnavailableFiles(){
+    std::vector< SvtHistoryOptions::HistoryItem > aHistoryList = SvtHistoryOptions::GetList( EHistoryType::PickList );
+    for ( size_t i = 0; i < aHistoryList.size(); i++ )
+    {
+        const SvtHistoryOptions::HistoryItem& rPickListEntry = aHistoryList[i];
+        if ( !comphelper::DirectoryHelper::fileExists(rPickListEntry.sURL) ){
+            SvtHistoryOptions::DeleteItem(EHistoryType::PickList,rPickListEntry.sURL);
+        }
+    }
+    Reload();
+}
+
 bool RecentDocsView::MouseButtonDown( const MouseEvent& rMEvt )
 {
     if (rMEvt.IsLeft())

sfx2/source/dialog/backingwindow.cxx

@@ -603,6 +603,9 @@ IMPL_LINK (BackingWindow, MenuSelectHdl, const OString&, rId, void)
         mxAllRecentThumbnails->Reload();
         return;
     }
+    else if(rId == "clear_unavailable"){
+        mxAllRecentThumbnails->clearUnavailableFiles();
+    }
     else if (!rId.isEmpty())
     {
         initializeLocalView();

sfx2/uiconfig/ui/startcenter.ui

@@ -17,6 +17,13 @@
         <property name="label" translatable="yes" context="startcenter|clear_all">Clear Recent Documents</property>
       </object>
     </child>
+    <child>
+      <object class="GtkMenuItem" id="clear_unavailable">
+        <property name="visible">True</property>
+        <property name="can-focus">False</property>
+        <property name="label" translatable="yes" context="startcenter|clear_unavailable">Clear Unavailable Files</property>
+      </object>
+    </child>
   </object>
   <object class="GtkImage" id="database_all_image">
     <property name="visible">True</property>