presentation minimizer: warn user about unsaved presentation

If minimizer is used on current presentation without making
a copy and it has local modification we should suggest user
to save it before, since not all minimization opearions could
be reverted later.

Change-Id: I12600c9a818698418f3ec957d43b13c6044609d2
Reviewed-on: https://gerrit.libreoffice.org/64261
Tested-by: Jenkins
Reviewed-by: Thorsten Behrens <Thorsten.Behrens@CIB.de>

officecfg/registry/data/org/openoffice/Office/PresentationMinimizer.xcu

@@ -199,6 +199,9 @@ The current presentation contains no OLE objects.</value>
         <prop oor:name="STR_FILENAME_SUFFIX">
             <value xml:lang="en-US">(minimized)</value>
         </prop>
+        <prop oor:name="STR_WARN_UNSAVED_PRESENTATION">
+            <value xml:lang="en-US">Do you want to minimize presentation without saving?</value>
+        </prop>
     </node>
     <node oor:name="LastUsedSettings">
         <prop oor:name="Name">

officecfg/registry/schema/org/openoffice/Office/PresentationMinimizer.xcs

@@ -365,6 +365,10 @@ The current presentation contains no OLE objects.</value>
 		<info><desc>String STR_FILENAME_SUFFIX.</desc></info>
 				<value>(minimized)</value>
 			</prop>
+			<prop oor:name="STR_WARN_UNSAVED_PRESENTATION" oor:type="xs:string" oor:localized="true">
+		<info><desc>String STR_WARN_UNSAVED_PRESENTATION.</desc></info>
+				<value>Do you want to minimize presentation without saving?</value>
+			</prop>
 		</group>
 		<node-ref oor:name="LastUsedSettings" oor:node-type="OptimizerSettings">
 			<info>

sdext/Library_PresentationMinimizer.mk

@@ -30,6 +30,7 @@ $(eval $(call gb_Library_set_include,PresentationMinimizer,\
 ))
 
 $(eval $(call gb_Library_use_libraries,PresentationMinimizer,\
+    comphelper \
     cppu \
     cppuhelper \
     sal \

sdext/source/minimizer/optimizerdialog.cxx

@@ -28,9 +28,12 @@
 #include <com/sun/star/io/XInputStream.hpp>
 #include <com/sun/star/io/IOException.hpp>
 #include <com/sun/star/util/XCloseBroadcaster.hpp>
+#include <com/sun/star/util/XModifiable.hpp>
 #include <sal/macros.h>
 #include <osl/time.h>
 #include <vcl/errinf.hxx>
+#include <vcl/weld.hxx>
+#include <vcl/layout.hxx>
 #include <svtools/sfxecode.hxx>
 #include <svtools/ehdl.hxx>
 #include <tools/urlobj.hxx>
@@ -498,6 +501,7 @@ void ActionListener::actionPerformed( const ActionEvent& rEvent )
             mrOptimizerDialog.getControlProperty( "RadioButton1Pg4", "State" ) >>= nInt16;
             if ( nInt16 )
             {
+                // Duplicate presentation before applying changes
                 OUString aSaveAsURL;
                 FileOpenDialog aFileOpenDialog( mrOptimizerDialog.GetComponentContext() );
 
@@ -550,6 +554,30 @@ void ActionListener::actionPerformed( const ActionEvent& rEvent )
                     mrOptimizerDialog.mxReschedule->reschedule();
                 }
             }
+            else
+            {
+                // Apply changes to current presentation
+                Reference<XModifiable> xModifiable(mrOptimizerDialog.mxController->getModel(),
+                                                   UNO_QUERY_THROW );
+                if ( xModifiable->isModified() )
+                {
+                    SolarMutexGuard aSolarGuard;
+                    std::unique_ptr<weld::MessageDialog> popupDlg(Application::CreateMessageDialog(
+                        nullptr, VclMessageType::Question, VclButtonsType::YesNo,
+                        mrOptimizerDialog.getString(STR_WARN_UNSAVED_PRESENTATION)));
+                    if (popupDlg->run() != RET_YES)
+                    {
+                        // Selected not "yes" ("no" or dialog was cancelled) so return to previous step
+                        mrOptimizerDialog.setControlProperty("btnNavBack", "Enabled",
+                                                                  Any(true));
+                        mrOptimizerDialog.setControlProperty("btnNavNext", "Enabled", Any(false));
+                        mrOptimizerDialog.setControlProperty("btnNavFinish", "Enabled", Any(true));
+                        mrOptimizerDialog.setControlProperty("btnNavCancel", "Enabled", Any(true));
+                        mrOptimizerDialog.EnablePage(ITEM_ID_SUMMARY);
+                        return;
+                    }
+                }
+            }
             if ( bSuccessfullyExecuted )
             {   // now check if we have to store a session template
                 nInt16 = 0;

sdext/source/minimizer/pppoptimizertoken.cxx

@@ -153,6 +153,7 @@ static const TokenTable pTokenTableArray[] =
     { "STR_CREATING_OLE_REPLACEMENTS",STR_CREATING_OLE_REPLACEMENTS },
     { "STR_FileSizeSeparator",      STR_FILESIZESEPARATOR },
     { "STR_FILENAME_SUFFIX",        STR_FILENAME_SUFFIX },
+    { "STR_WARN_UNSAVED_PRESENTATION", STR_WARN_UNSAVED_PRESENTATION },
 
 
     { "NotFound",           TK_NotFound }

sdext/source/minimizer/pppoptimizertoken.hxx

@@ -136,7 +136,7 @@ enum PPPOptimizerTokenEnum
     STR_CREATING_OLE_REPLACEMENTS,
     STR_FILESIZESEPARATOR,
     STR_FILENAME_SUFFIX,
-
+    STR_WARN_UNSAVED_PRESENTATION,
     TK_NotFound
 };