#110496# Merge from cws_srx645_canvas01: first working version of UNO slideshow component, providing basic presentation functionality for Impress XShapes

1 files changed, 179 insertions, 0 deletions

diff --git a/slideshow/source/engine/activitiesqueue.cxx b/slideshow/source/engine/activitiesqueue.cxx
new file mode 100644
index 000000000000..21e4b981a3e6
--- /dev/null
+++ b/slideshow/source/engine/activitiesqueue.cxx
@@ -0,0 +1,179 @@
+/*************************************************************************
+ *
+ *  $RCSfile: activitiesqueue.cxx,v $
+ *
+ *  $Revision: 1.2 $
+ *
+ *  last change: $Author: thb $ $Date: 2004-03-18 10:44:24 $
+ *
+ *  The Contents of this file are made available subject to the terms of
+ *  either of the following licenses
+ *
+ *         - GNU Lesser General Public License Version 2.1
+ *         - Sun Industry Standards Source License Version 1.1
+ *
+ *  Sun Microsystems Inc., October, 2000
+ *
+ *  GNU Lesser General Public License Version 2.1
+ *  =============================================
+ *  Copyright 2000 by Sun Microsystems, Inc.
+ *  901 San Antonio Road, Palo Alto, CA 94303, USA
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Lesser General Public
+ *  License version 2.1, as published by the Free Software Foundation.
+ *
+ *  This library is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *  Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public
+ *  License along with this library; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ *  MA  02111-1307  USA
+ *
+ *
+ *  Sun Industry Standards Source License Version 1.1
+ *  =================================================
+ *  The contents of this file are subject to the Sun Industry Standards
+ *  Source License Version 1.1 (the "License"); You may not use this file
+ *  except in compliance with the License. You may obtain a copy of the
+ *  License at http://www.openoffice.org/license.html.
+ *
+ *  Software provided under this License is provided on an "AS IS" basis,
+ *  WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
+ *  WITHOUT LIMITATION, WARRANTIES THAT THE SOFTWARE IS FREE OF DEFECTS,
+ *  MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE, OR NON-INFRINGING.
+ *  See the License for the specific provisions governing your rights and
+ *  obligations concerning the Software.
+ *
+ *  The Initial Developer of the Original Code is: Sun Microsystems, Inc.
+ *
+ *  Copyright: 2000 by Sun Microsystems, Inc.
+ *
+ *  All Rights Reserved.
+ *
+ *  Contributor(s): _______________________________________
+ *
+ *
+ ************************************************************************/
+
+#ifndef _OSL_DIAGNOSE_H_
+#include <osl/diagnose.h>
+#endif
+#ifndef _CANVAS_VERBOSETRACE_HXX
+#include <canvas/verbosetrace.hxx>
+#endif
+
+#include "activity.hxx"
+#include "activitiesqueue.hxx"
+
+using namespace ::drafts::com::sun::star;
+using namespace ::com::sun::star;
+
+namespace presentation
+{
+    namespace internal
+    {
+        ActivitiesQueue::ActivitiesQueue( const ::cppcanvas::SpriteCanvasSharedPtr& rDisplayCanvas ) :
+            mpSpriteCanvas( rDisplayCanvas ),
+            maCurrentActivitiesWaiting(),
+            maCurrentActivitiesReinsert(),
+            mbCurrentRoundNeedsScreenUpdate( false )
+        {
+        }
+
+        bool ActivitiesQueue::addActivity( const ActivitySharedPtr& pActivity )
+        {
+            OSL_ENSURE( pActivity.get() != NULL, "ActivitiesQueue::addActivity: activity ptr NULL" );
+
+            if( pActivity.get() == NULL )
+                return false;
+
+            // add entry to waiting list
+            maCurrentActivitiesWaiting.push_back( pActivity );
+
+            return true;
+        }
+
+        void ActivitiesQueue::process()
+        {
+            VERBOSE_TRACE( "ActivitiesQueue: outer loop heartbeat" );
+
+            // process list of activities
+            if( !maCurrentActivitiesWaiting.empty() )
+            {
+                // process topmost activity
+                ActivitySharedPtr pActivity( maCurrentActivitiesWaiting.front() );
+                maCurrentActivitiesWaiting.pop_front();
+
+                bool bReinsert( false );
+
+                try
+                {
+                    // fire up activity
+                    bReinsert = pActivity->perform();
+
+                    OSL_ENSURE( bReinsert == pActivity->isActive(),
+                                "::presentation::internal::ActivitiesQueue: Inconsistent Activity state" );
+                }
+                catch(...)
+                {
+                    // catch anything here, we don't want
+                    // to leave this scope under _any_
+                    // circumstance. Although, do _not_
+                    // reinsert an activity that threw
+                    // once.
+                    OSL_TRACE( "::presentation::internal::ActivitiesQueue: Activity threw, removing from ring" );
+                }
+
+                // always query need for screen updates. Note that
+                // ending activities (i.e. those that return
+                // bReinsert=false) might also need one last screen
+                // update
+                if( pActivity->needsScreenUpdate() )
+                    mbCurrentRoundNeedsScreenUpdate = true;
+
+                if( bReinsert )
+                    maCurrentActivitiesReinsert.push_back( pActivity );
+
+                VERBOSE_TRACE( "ActivitiesQueue: inner loop heartbeat" );
+            }
+
+            // waiting activities exhausted? Then update screen, and
+            // reinsert
+            if( maCurrentActivitiesWaiting.empty() )
+            {
+                if( mbCurrentRoundNeedsScreenUpdate &&
+                    mpSpriteCanvas.get() != NULL )
+                {
+                    // flush rendered content to screen, in a
+                    // controlled, atomic update operation
+                    mpSpriteCanvas->updateScreen();
+                }
+
+                // always clear update flag. There's no need to update
+                // yesterday's display, even if the canvas sometimes
+                // become valid
+                mbCurrentRoundNeedsScreenUpdate = false;
+
+                if( !maCurrentActivitiesReinsert.empty() )
+                {
+                    // reinsert all processed, but not finished
+                    // activities back to waiting queue. With swap(),
+                    // we kill two birds with one stone: we reuse the
+                    // list nodes, and we clear the
+                    // maCurrentActivitiesReinsert list
+                    maCurrentActivitiesWaiting.swap( maCurrentActivitiesReinsert );
+                }
+            }
+        }
+
+        bool ActivitiesQueue::isEmpty()
+        {
+            return maCurrentActivitiesWaiting.empty() && maCurrentActivitiesReinsert.empty();
+        }
+
+    }
+}