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diff --git a/fpicker/source/aqua/SalAquaPicker.mm b/fpicker/source/aqua/SalAquaPicker.mm
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+++ b/fpicker/source/aqua/SalAquaPicker.mm
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+/* -*- 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/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <sal/config.h>
+#include <sal/log.hxx>
+
+#include <com/sun/star/lang/DisposedException.hpp>
+#include <com/sun/star/lang/XMultiServiceFactory.hpp>
+#include <cppuhelper/interfacecontainer.h>
+#include <osl/diagnose.h>
+#include "FPServiceInfo.hxx"
+#include <osl/mutex.hxx>
+#include <vcl/svapp.hxx>
+#include "SalAquaPicker.hxx"
+#include <osl/file.hxx>
+#include "CFStringUtilities.hxx"
+#include "NSString_OOoAdditions.hxx"
+
+#include "NSURL_OOoAdditions.hxx"
+
+#include "SalAquaFilePicker.hxx"
+
+#include <stdio.h>
+
+#pragma mark DEFINES
+#define kSetHideExtensionStateKey @"NSNavLastUserSetHideExtensionButtonState"
+
+using namespace ::com::sun::star;
+using namespace ::com::sun::star::lang;
+using namespace ::com::sun::star::uno;
+
+SalAquaPicker::SalAquaPicker()
+: m_pDialog(nullptr)
+, m_pControlHelper(new ControlHelper())
+{
+}
+
+SalAquaPicker::~SalAquaPicker()
+{
+    SolarMutexGuard aGuard;
+
+    NSAutoreleasePool *pool = [NSAutoreleasePool new];
+
+    if (nullptr != m_pControlHelper)
+        delete m_pControlHelper;
+
+    if (nullptr != m_pDialog)
+        [m_pDialog release];
+
+    [pool release];
+}
+
+void SalAquaPicker::implInitialize()
+{
+    SolarMutexGuard aGuard;
+
+    if (m_pDialog != nil) {
+        return;
+    }
+
+    switch (m_nDialogType)
+    {
+        case NAVIGATIONSERVICES_OPEN:
+            m_pDialog = [NSOpenPanel openPanel];
+            [static_cast<NSOpenPanel*>(m_pDialog) setCanChooseDirectories:NO];
+            [static_cast<NSOpenPanel*>(m_pDialog) setCanChooseFiles:YES];
+            break;
+
+        case NAVIGATIONSERVICES_SAVE:
+            m_pDialog = [NSSavePanel savePanel];
+            [m_pDialog setCanSelectHiddenExtension:NO]; //changed for issue #102102
+            /* I would have loved to use
+             * [(NSSavePanel*)m_pDialog setExtensionHidden:YES];
+             * here but unfortunately this
+             * a) only works when the dialog is already displayed because it seems to act on the corresponding checkbox (that we don't show but that doesn't matter)
+             * b) macOS saves this setting on an application-based level which means that the last state is always being restored again when the app runs for the next time
+             *
+             * So the only reliable way seems to be using the NSUserDefaults object because that is where that value is stored and
+             * to just overwrite it if it has the wrong value.
+             */
+            {
+                NSUserDefaults *pDefaults = [NSUserDefaults standardUserDefaults];
+                NSNumber *pExtn = [pDefaults objectForKey:kSetHideExtensionStateKey];
+                if(pExtn == nil || [pExtn boolValue] == NO) {
+                    [pDefaults setBool:YES forKey:kSetHideExtensionStateKey];
+                }
+            }
+            break;
+
+        case NAVIGATIONSERVICES_DIRECTORY:
+            m_pDialog = [NSOpenPanel openPanel];
+            [static_cast<NSOpenPanel*>(m_pDialog) setCanChooseDirectories:YES];
+            [static_cast<NSOpenPanel*>(m_pDialog) setCanChooseFiles:NO];
+            break;
+
+        default:
+            break;
+    }
+
+    if (m_pDialog != nil) {
+        [static_cast<NSOpenPanel*>(m_pDialog) setCanCreateDirectories:YES];
+        //Retain the dialog instance or it will go away immediately
+        [m_pDialog retain];
+    }
+}
+
+int SalAquaPicker::run()
+{
+    SolarMutexGuard aGuard;
+
+    NSAutoreleasePool *pool = [NSAutoreleasePool new];
+
+    if (m_pDialog == nullptr) {
+        //this is the case e.g. for the folder picker at this stage
+        implInitialize();
+    }
+
+    NSView *userPane = m_pControlHelper->getUserPane();
+    if (userPane != nullptr) {
+        [m_pDialog setAccessoryView:userPane];
+    }
+
+    int retVal = 0;
+
+    NSURL *startDirectory;
+    if (m_sDisplayDirectory.getLength() > 0) {
+        NSString *temp = [NSString stringWithOUString:m_sDisplayDirectory];
+        startDirectory = [NSURL URLWithString:temp];
+
+        SAL_INFO("fpicker.aqua", "start dir: " << [startDirectory path]);
+    }
+    else {
+        startDirectory = [NSURL fileURLWithPath:NSHomeDirectory() isDirectory:YES];
+    }
+
+    switch(m_nDialogType) {
+        case NAVIGATIONSERVICES_DIRECTORY:
+        case NAVIGATIONSERVICES_OPEN:
+            [m_pDialog setDirectoryURL:startDirectory];
+            retVal = [static_cast<NSOpenPanel*>(m_pDialog) runModal];
+            break;
+        case NAVIGATIONSERVICES_SAVE:
+            [m_pDialog setDirectoryURL:startDirectory];
+            [m_pDialog setNameFieldStringValue:[NSString stringWithOUString:static_cast<SalAquaFilePicker*>(this)->getSaveFileName()]];
+            retVal = [m_pDialog runModal];
+            break;
+        // [m_pDialog beginSheetForDirectory:startDirectory file:[m_pDialog saveFilename] modalForWindow:[NSApp keyWindow] modalDelegate:((SalAquaFilePicker*)this)->getDelegate() didEndSelector:@selector(savePanelDidEnd:returnCode:contextInfo:) contextInfo:nil];
+        default:
+            break;
+    }
+
+    SAL_WNODEPRECATED_DECLARATIONS_PUSH
+        //TODO: 10.13 NSFileHandlingPanelOKButton
+    if (retVal == NSFileHandlingPanelOKButton) {
+    SAL_WNODEPRECATED_DECLARATIONS_POP
+        NSURL* pDir = [m_pDialog directoryURL];
+        if (pDir) {
+            implsetDisplayDirectory([pDir OUStringForInfo:FULLPATH]);
+        }
+    }
+
+    [pool release];
+
+    return retVal;
+}
+
+int SalAquaPicker::runandwaitforresult()
+{
+    SolarMutexGuard aGuard;
+
+    int status = run();
+
+    return status;
+}
+
+void SalAquaPicker::implsetDisplayDirectory( const OUString& aDirectory )
+{
+    SolarMutexGuard aGuard;
+
+    if (aDirectory != m_sDisplayDirectory) {
+        m_sDisplayDirectory = aDirectory;
+    }
+}
+
+OUString const & SalAquaPicker::implgetDisplayDirectory()
+{
+    return m_sDisplayDirectory;
+}
+
+void SalAquaPicker::implsetTitle( const OUString& aTitle )
+{
+    SolarMutexGuard aGuard;
+
+    if (m_pDialog != nil) {
+        [m_pDialog setTitle:[NSString stringWithOUString:aTitle]];
+    }
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */