Switched S60 QDesktopServices implementation to CDocumentHandler based.

RApaLsSession based implementation did not succeed to start music
player in some S60 devices to playing mode. The only found solution to
this problem was to start using CDocumentHandler based implementation.
CDocumentHandler adds a new S60 dependency, but it is needed to make
QDesktopServices APIs fully fuonctional. However if Qt is comfigured
without S60 we still fallback to RApaLsSession implementation.

With CDocumentHandler the files are also opened as embedded, due to the
fact that swicthing files in stand-alone mode would require SwEvent
capability.

Task-number: QTBUG-4699
Reviewed-by: Miikka Heikkinen

1 files changed, 49 insertions, 23 deletions

diff --git a/src/gui/util/qdesktopservices_s60.cpp b/src/gui/util/qdesktopservices_s60.cpp
index 1890d56..c6932de 100644
--- a/src/gui/util/qdesktopservices_s60.cpp
+++ b/src/gui/util/qdesktopservices_s60.cpp
@@ -41,7 +41,7 @@
 
 // This flag changes the implementation to use S60 CDcoumentHandler
 // instead of apparch when opening the files
-#undef USE_DOCUMENTHANDLER
+#define USE_DOCUMENTHANDLER
 
 #include <qcoreapplication.h>
 #include <qdir.h>
@@ -58,12 +58,14 @@
 #include <rsendasmessage.h>         // RSendAsMessage
 
 #ifdef Q_WS_S60
-#  include <pathinfo.h>               // PathInfo
+#  include <pathinfo.h>             // PathInfo
 #  ifdef USE_DOCUMENTHANDLER
-#    include <documenthandler.h>        // CDocumentHandler
+#    include <documenthandler.h>    // CDocumentHandler
+#    include <aknserverapp.h>
 #  endif
-#elif defined(USE_DOCUMENTHANDLER)
-#  error CDocumentHandler requires support for S60
+#else
+#  warning CDocumentHandler requires support for S60
+#  undef USE_DOCUMENTHANDLER        // Fallback to RApaLsSession based implementation
 #endif
 
 QT_BEGIN_NAMESPACE
@@ -95,6 +97,42 @@ private:
     R* mPtr;
 };
 
+#ifdef USE_DOCUMENTHANDLER
+class QS60DocumentHandler : public MAknServerAppExitObserver
+{
+public:
+    QS60DocumentHandler() :docHandler(0) {}
+
+    ~QS60DocumentHandler() {
+        delete docHandler;
+    }
+
+    CDocumentHandler& documentHandler() {
+        // In case user calls openUrl twice subsequently, before the first embedded app is closed
+        // we use the same CDocumentHandler instance. Using same instance makes sure the first
+        // launched embedded app is closed and latter one gets embedded to our app.
+        // Using different instance would help only theoretically since user cannot interact with
+        // several embedded apps at the same time.
+        if(!docHandler) {
+            QT_TRAP_THROWING(docHandler = CDocumentHandler::NewL());
+            docHandler->SetExitObserver(this);
+        }
+        return *docHandler;
+    }
+
+private: // From MAknServerAppExitObserver
+    void HandleServerAppExit(TInt /*aReason*/) {
+        delete docHandler;
+        docHandler = 0;
+    }
+
+private:
+    CDocumentHandler* docHandler;
+};
+Q_GLOBAL_STATIC(QS60DocumentHandler, qt_s60_documenthandler);
+#endif
+
+
 static void handleMailtoSchemeLX(const QUrl &url)
 {
     // this function has many intermingled leaves and throws. Qt and Symbian objects do not have
@@ -264,21 +302,9 @@ static void openDocumentL(const TDesC& aUrl)
     CleanupStack::PopAndDestroy(); // appArcSession
 #else
     // This is an alternative way to launch app associated to MIME type
-    // CDocumentHandler would support opening apps in embedded mode,
-    // but our Qt application window group seems to always get switched on top of embedded one
-    // -> Cannot use menus etc of embedded app -> used
-
-    CDocumentHandler* docHandler = CDocumentHandler::NewLC();
+    // CDocumentHandler also supports opening apps in embedded mode.
     TDataType temp;
-    //Standalone file opening fails for some file-types at least in S60 3.1 emulator
-    //For example .txt file fails with KErrAlreadyInUse and music files with KERN-EXEC 0
-    //Workaround is to use OpenFileEmbeddedL
-    //docHandler->OpenFileL(aUrl, temp);
-
-    // Opening file with CDocumentHandler will leave if file does not exist
-    // Leave is trapped in openDocument and false returned to user.
-    docHandler->OpenFileEmbeddedL(aUrl, temp);
-    CleanupStack::PopAndDestroy(docHandler);
+    qt_s60_documenthandler()->documentHandler().OpenFileEmbeddedL(aUrl, temp);
 #endif
 }
 
@@ -349,7 +375,7 @@ QString QDesktopServices::storageLocation(StandardLocation type)
     case DesktopLocation:
         qWarning("No desktop concept in Symbian OS");
         // But lets still use some feasible default
-        path.Append(writableDataRoot());           
+        path.Append(writableDataRoot());
         break;
     case DocumentsLocation:
         path.Append(writableDataRoot());
@@ -380,7 +406,7 @@ QString QDesktopServices::storageLocation(StandardLocation type)
 #endif
         break;
     case TempLocation:
-        return QDir::tempPath(); 
+        return QDir::tempPath();
         break;
     case HomeLocation:
         path.Append(writableDataRoot());
@@ -394,10 +420,10 @@ QString QDesktopServices::storageLocation(StandardLocation type)
         CEikonEnv::Static()->FsSession().PrivatePath(path);
         path.Insert(0, writableExeDrive().Name());
         path.Append(KCacheSubDir);
-        break;        
+        break;
     default:
         // Lets use feasible default
-        path.Append(writableDataRoot());    
+        path.Append(writableDataRoot());
         break;
     }