Fix crash on saving time if some of the existing annotations where removed

Also rename a variable to make it more clear what it does

generators/poppler/annots.cpp

@@ -62,8 +62,8 @@ static int maskExportedFlags(int flags)
 }
 
 //BEGIN PopplerAnnotationProxy implementation
-PopplerAnnotationProxy::PopplerAnnotationProxy( Poppler::Document *doc, QMutex *userMutex )
-    : ppl_doc ( doc ), mutex ( userMutex )
+PopplerAnnotationProxy::PopplerAnnotationProxy( Poppler::Document *doc, QMutex *userMutex, QHash<Okular::Annotation*, Poppler::Annotation*> *annotsOnOpenHash )
+    : ppl_doc ( doc ), mutex ( userMutex ), annotationsOnOpenHash( annotsOnOpenHash )
 {
 }
 
@@ -254,6 +254,7 @@ void PopplerAnnotationProxy::notifyRemoval( Okular::Annotation *okl_ann, int pag
     QMutexLocker ml(mutex);
 
     Poppler::Page *ppl_page = ppl_doc->page( page );
+    annotationsOnOpenHash->remove( okl_ann );
     ppl_page->removeAnnotation( ppl_ann ); // Also destroys ppl_ann
     delete ppl_page;
 

generators/poppler/annots.h

@@ -23,7 +23,7 @@ extern Okular::Annotation* createAnnotationFromPopplerAnnotation( Poppler::Annot
 class PopplerAnnotationProxy : public Okular::AnnotationProxy
 {
     public:
-        PopplerAnnotationProxy( Poppler::Document *doc, QMutex *userMutex );
+        PopplerAnnotationProxy( Poppler::Document *doc, QMutex *userMutex, QHash<Okular::Annotation*, Poppler::Annotation*> *annotsOnOpenHash );
         ~PopplerAnnotationProxy();
 
         bool supports( Capability capability ) const override;
@@ -33,6 +33,7 @@ class PopplerAnnotationProxy : public Okular::AnnotationProxy
     private:
         Poppler::Document *ppl_doc;
         QMutex *mutex;
+        QHash<Okular::Annotation*, Poppler::Annotation*> *annotationsOnOpenHash;
 };
 
 #endif

generators/poppler/generator_pdf.cpp

@@ -579,7 +579,7 @@ Okular::Document::OpenResult PDFGenerator::init(QVector<Okular::Page*> & pagesVe
     pagesVector.resize(pageCount);
     rectsGenerated.fill(false, pageCount);
 
-    annotationsHash.clear();
+    annotationsOnOpenHash.clear();
 
     loadPages(pagesVector, 0, false);
 
@@ -587,7 +587,7 @@ Okular::Document::OpenResult PDFGenerator::init(QVector<Okular::Page*> & pagesVe
     reparseConfig();
 
     // create annotation proxy
-    annotProxy = new PopplerAnnotationProxy( pdfdoc, userMutex() );
+    annotProxy = new PopplerAnnotationProxy( pdfdoc, userMutex(), &annotationsOnOpenHash );
 
     // the file has been loaded correctly
     return Okular::Document::OpenSuccess;
@@ -1006,8 +1006,8 @@ void PDFGenerator::resolveMediaLinkReference( Okular::Action *action )
     if ( (action->actionType() != Okular::Action::Movie) && (action->actionType() != Okular::Action::Rendition) )
         return;
 
-    resolveMediaLinks<Poppler::LinkMovie, Okular::MovieAction, Poppler::MovieAnnotation, Okular::MovieAnnotation>( action, Okular::Annotation::AMovie, annotationsHash );
-    resolveMediaLinks<Poppler::LinkRendition, Okular::RenditionAction, Poppler::ScreenAnnotation, Okular::ScreenAnnotation>( action, Okular::Annotation::AScreen, annotationsHash );
+    resolveMediaLinks<Poppler::LinkMovie, Okular::MovieAction, Poppler::MovieAnnotation, Okular::MovieAnnotation>( action, Okular::Annotation::AMovie, annotationsOnOpenHash );
+    resolveMediaLinks<Poppler::LinkRendition, Okular::RenditionAction, Poppler::ScreenAnnotation, Okular::ScreenAnnotation>( action, Okular::Annotation::AScreen, annotationsOnOpenHash );
 }
 
 void PDFGenerator::resolveMediaLinkReferences( Okular::Page *page )
@@ -1564,7 +1564,7 @@ void PDFGenerator::addAnnotations( Poppler::Page * popplerPage, Okular::Page * p
             }
 
             if ( !doDelete )
-                annotationsHash.insert( newann, a );
+                annotationsOnOpenHash.insert( newann, a );
         }
         if ( doDelete )
             delete a;
@@ -1718,7 +1718,7 @@ bool PDFGenerator::save( const QString &fileName, SaveOptions options, QString *
 
     QMutexLocker locker( userMutex() );
 
-    QHashIterator<Okular::Annotation*, Poppler::Annotation*> it( annotationsHash );
+    QHashIterator<Okular::Annotation*, Poppler::Annotation*> it( annotationsOnOpenHash );
     while ( it.hasNext() )
     {
         it.next();

generators/poppler/generator_pdf.h

@@ -137,7 +137,9 @@ class PDFGenerator : public Okular::Generator, public Okular::ConfigInterface, p
         mutable QList<Okular::EmbeddedFile*> docEmbeddedFiles;
         int nextFontPage;
         PopplerAnnotationProxy *annotProxy;
-        QHash<Okular::Annotation*, Poppler::Annotation*> annotationsHash;
+        // the hash below only contains annotations that were present on the file at open time
+        // this is enough for what we use it for
+        QHash<Okular::Annotation*, Poppler::Annotation*> annotationsOnOpenHash;
 
         QBitArray rectsGenerated;