tdf#137356 framework: fix opening the same document twice for long loads

If the document loading is long enough that the statusbar is updated,
then we can have this situation that we start loading the document, then
spin the main loop during load and do a second load of the same document
as part of the main loop spinning:

#0  SwDoc::SwDoc() (this=0x1c6a180) at sw/source/core/doc/docnew.cxx:194
...
#6  0x00007ffff359a6dd in SfxBaseModel::load(com::sun::star::uno::Sequence<com::sun::star::beans::PropertyValue> const&) (this=0x1c5c260, seqArguments=uno::Sequence of length 15 = {...})
...
#33 0x00007fffeeb81ecd in Application::Reschedule(bool) (i_bAllEvents=true) at vcl/source/app/svapp.cxx:460
...
#36 0x00007ffff4265251 in framework::StatusIndicator::start(rtl::OUString const&, int) (this=0x1aace80, sText="Loading document...", nRange=1000000) at framework/source/helper/statusindicator.cxx:51
#37 0x00007fffd026dfd3 in XMLReader::Read(SwDoc&, rtl::OUString const&, SwPaM&, rtl::OUString const&) (this=0x1bb7d20, rDoc=..., rBaseURL="file:///.../test.odt", rPaM=SwPaM = {...}, rName="") at sw/source/filter/xml/swxml.cxx:630
...
#42 0x00007ffff359a6dd in SfxBaseModel::load(com::sun::star::uno::Sequence<com::sun::star::beans::PropertyValue> const&) (this=0x1bce4d0, seqArguments=uno::Sequence of length 15 = {...}) at sfx2/source/doc/sfxbasemodel.cxx:1883

The reason for this is is that by the time
LoadEnv::impl_searchAlreadyLoaded() searches for frames which already
have this doc open, the first load is still in progress, and we
assiciate the frame with its controller (which has the URL) only once
the load finishes.

Fix the problem by setting the URL on the frame directly for the
duration of the load: this way an in-progress load also counts as a
duplicate and we'll have just one document open at the end.

Regression from commit 74ac65c49cc1d53b1aa93c2b7c720255867aace2
(#i114963# Enable IPC before OpenClients to allow client connections
when printing., 2016-09-06), we just didn't process incoming requests on
the socket before, so the problem was less visible.

Change-Id: Ib138c4c264e2508c20104ab268501bcca31e2790
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/104310
Reviewed-by: Miklos Vajna <vmiklos@collabora.com>
Tested-by: Jenkins

1 files changed, 43 insertions, 15 deletions

diff --git a/framework/source/loadenv/loadenv.cxx b/framework/source/loadenv/loadenv.cxx
index b25b0fea8f3a..dbe80f802c25 100644
--- a/framework/source/loadenv/loadenv.cxx
+++ b/framework/source/loadenv/loadenv.cxx
@@ -1154,6 +1154,13 @@ bool LoadEnv::impl_loadContent()
     }
     else if (xSyncLoader.is())
     {
+        uno::Reference<beans::XPropertySet> xTargetFrameProps(xTargetFrame, uno::UNO_QUERY);
+        if (xTargetFrameProps.is())
+        {
+            // Set the URL on the frame itself, for the duration of the load, when it has no
+            // controller.
+            xTargetFrameProps->setPropertyValue("URL", uno::makeAny(sURL));
+        }
         bool bResult = xSyncLoader->load(lDescriptor, xTargetFrame);
         // react for the result here, so the outside waiting
         // code can ask for it later.
@@ -1319,23 +1326,38 @@ css::uno::Reference< css::frame::XFrame > LoadEnv::impl_searchAlreadyLoaded()
             if (!xTask.is())
                 continue;
 
+            OUString sURL;
             css::uno::Reference< css::frame::XController > xController = xTask->getController();
             if (!xController.is())
             {
-                xTask.clear ();
-                continue;
+                // If we have no controller, then perhaps there is a load in progress. The frame
+                // itself has the URL in this case.
+                uno::Reference<beans::XPropertySet> xTaskProps(xTask, uno::UNO_QUERY);
+                if (xTaskProps.is())
+                {
+                    xTaskProps->getPropertyValue("URL") >>= sURL;
+                }
+                if (sURL.isEmpty())
+                {
+                    xTask.clear();
+                    continue;
+                }
             }
 
-            css::uno::Reference< css::frame::XModel > xModel = xController->getModel();
-            if (!xModel.is())
+            uno::Reference<frame::XModel> xModel;
+            if (sURL.isEmpty())
             {
-                xTask.clear ();
-                continue;
+                xModel = xController->getModel();
+                if (!xModel.is())
+                {
+                    xTask.clear();
+                    continue;
+                }
+
+                // don't check the complete URL here.
+                // use its main part - ignore optional jumpmarks!
+                sURL = xModel->getURL();
             }
-
-            // don't check the complete URL here.
-            // use its main part - ignore optional jumpmarks!
-            const OUString sURL = xModel->getURL();
             if (!::utl::UCBContentHelper::EqualURLs( m_aURL.Main, sURL ))
             {
                 xTask.clear ();
@@ -1346,12 +1368,18 @@ css::uno::Reference< css::frame::XFrame > LoadEnv::impl_searchAlreadyLoaded()
             // and decide if it's really the same then the one will be.
             // It must be visible and must use the same file revision ...
             // or must not have any file revision set (-1 == -1!)
-            utl::MediaDescriptor lOldDocDescriptor(xModel->getArgs());
-
-            if (lOldDocDescriptor.getUnpackedValueOrDefault(utl::MediaDescriptor::PROP_VERSION(), sal_Int32(-1)) != nNewVersion)
+            utl::MediaDescriptor lOldDocDescriptor;
+            if (xModel.is())
             {
-                xTask.clear ();
-                continue;
+                lOldDocDescriptor = xModel->getArgs();
+
+                if (lOldDocDescriptor.getUnpackedValueOrDefault(
+                        utl::MediaDescriptor::PROP_VERSION(), sal_Int32(-1))
+                    != nNewVersion)
+                {
+                    xTask.clear();
+                    continue;
+                }
             }
 
             // Hidden frames are special.