Add a close() method for the comicbook document so:

- resources can be freed when closing the Okular document for real (and not just when opening a new comicbook document or quitting)
- we do not crash when doing an opening sequence like: cbz -> cbr -> cbz

svn path=/trunk/KDE/kdegraphics/okular/; revision=798868

generators/comicbook/document.cpp

@@ -25,15 +25,11 @@ Document::Document()
 
 Document::~Document()
 {
-    delete mUnrar;
-    delete mZip;
 }
 
 bool Document::open( const QString &fileName )
 {
-    delete mZip;
-    delete mUnrar;
-    mPageMap.clear();
+    close();
 
     /**
      * We have a zip archive
@@ -93,6 +89,18 @@ bool Document::open( const QString &fileName )
     return true;
 }
 
+void Document::close()
+{
+    if ( !( mZip || mUnrar ) )
+        return;
+
+    delete mZip;
+    mZip = 0;
+    delete mUnrar;
+    mUnrar = 0;
+    mPageMap.clear();
+}
+
 void Document::extractImageFiles( const QStringList &list )
 {
     QStringList files( list );

generators/comicbook/document.h

@@ -26,6 +26,7 @@ class Document
         ~Document();
 
         bool open( const QString &fileName );
+        void close();
 
         int pages() const;
         QStringList pageTitles() const;

generators/comicbook/generator_comicbook.cpp

@@ -76,6 +76,8 @@ bool ComicBookGenerator::loadDocument( const QString & fileName, QVector<Okular:
 
 bool ComicBookGenerator::doCloseDocument()
 {
+    mDocument.close();
+
     return true;
 }