LCOV - code coverage report
Current view: top level - slideshow/source/engine - screenupdater.cxx (source / functions) Hit Total Coverage
Test: commit 10e77ab3ff6f4314137acd6e2702a6e5c1ce1fae Lines: 9 85 10.6 %
Date: 2014-11-03 Functions: 4 17 23.5 %
Legend: Lines: hit not hit

          Line data    Source code
       1             : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
       2             : /*
       3             :  * This file is part of the LibreOffice project.
       4             :  *
       5             :  * This Source Code Form is subject to the terms of the Mozilla Public
       6             :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       7             :  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
       8             :  *
       9             :  * This file incorporates work covered by the following license notice:
      10             :  *
      11             :  *   Licensed to the Apache Software Foundation (ASF) under one or more
      12             :  *   contributor license agreements. See the NOTICE file distributed
      13             :  *   with this work for additional information regarding copyright
      14             :  *   ownership. The ASF licenses this file to you under the Apache
      15             :  *   License, Version 2.0 (the "License"); you may not use this file
      16             :  *   except in compliance with the License. You may obtain a copy of
      17             :  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
      18             :  */
      19             : 
      20             : #include "screenupdater.hxx"
      21             : #include "listenercontainer.hxx"
      22             : 
      23             : #include <boost/shared_ptr.hpp>
      24             : #include <boost/mem_fn.hpp>
      25             : #include <vector>
      26             : #include <algorithm>
      27             : 
      28             : namespace {
      29             :     class UpdateLock : public ::slideshow::internal::ScreenUpdater::UpdateLock
      30             :     {
      31             :     public:
      32             :         UpdateLock (::slideshow::internal::ScreenUpdater& rUpdater, const bool bStartLocked);
      33             :         virtual ~UpdateLock (void);
      34             :         virtual void Activate (void) SAL_OVERRIDE;
      35             :     private:
      36             :         ::slideshow::internal::ScreenUpdater& mrUpdater;
      37             :         bool mbIsActivated;
      38             :     };
      39             : }
      40             : 
      41             : namespace slideshow
      42             : {
      43             : namespace internal
      44             : {
      45             :     typedef std::vector<
      46             :         std::pair<UnoViewSharedPtr,bool> > UpdateRequestVector;
      47             : 
      48           2 :     struct ScreenUpdater::ImplScreenUpdater
      49             :     {
      50             :         /** List of registered ViewUpdaters, to consult for necessary
      51             :             updates
      52             :         */
      53             :         ThreadUnsafeListenerContainer<
      54             :             ViewUpdateSharedPtr,
      55             :             std::vector<ViewUpdateSharedPtr> > maUpdaters;
      56             : 
      57             :         /// Views that have been notified for update
      58             :         UpdateRequestVector                    maViewUpdateRequests;
      59             : 
      60             :         /// List of View. Used to issue screen updates on.
      61             :         UnoViewContainer const&                mrViewContainer;
      62             : 
      63             :         /// True, if a notifyUpdate() for all views has been issued.
      64             :         bool                                   mbUpdateAllRequest;
      65             : 
      66             :         /// True, if at least one notifyUpdate() call had bViewClobbered set
      67             :         bool                                   mbViewClobbered;
      68             : 
      69             :         /// The screen is updated only when mnLockCount==0
      70             :         sal_Int32 mnLockCount;
      71             : 
      72           2 :         explicit ImplScreenUpdater( UnoViewContainer const& rViewContainer ) :
      73             :             maUpdaters(),
      74             :             maViewUpdateRequests(),
      75             :             mrViewContainer(rViewContainer),
      76             :             mbUpdateAllRequest(false),
      77             :             mbViewClobbered(false),
      78           2 :             mnLockCount(0)
      79           2 :         {}
      80             :     };
      81             : 
      82           2 :     ScreenUpdater::ScreenUpdater( UnoViewContainer const& rViewContainer ) :
      83           2 :         mpImpl(new ImplScreenUpdater(rViewContainer) )
      84             :     {
      85           2 :     }
      86             : 
      87           2 :     ScreenUpdater::~ScreenUpdater()
      88             :     {
      89             :         // outline because of pimpl
      90           2 :     }
      91             : 
      92           0 :     void ScreenUpdater::notifyUpdate()
      93             :     {
      94           0 :         mpImpl->mbUpdateAllRequest = true;
      95           0 :     }
      96             : 
      97           0 :     void ScreenUpdater::notifyUpdate( const UnoViewSharedPtr& rView,
      98             :                                       bool                    bViewClobbered )
      99             :     {
     100           0 :         mpImpl->maViewUpdateRequests.push_back(
     101           0 :             std::make_pair(rView, bViewClobbered) );
     102             : 
     103           0 :         if( bViewClobbered )
     104           0 :             mpImpl->mbViewClobbered = true;
     105           0 :     }
     106             : 
     107           0 :     void ScreenUpdater::commitUpdates()
     108             :     {
     109           0 :         if (mpImpl->mnLockCount > 0)
     110           0 :             return;
     111             : 
     112             :         // cases:
     113             : 
     114             :         // (a) no update necessary at all
     115             : 
     116             :         // (b) no ViewUpdate-generated update
     117             :         //     I. update all views requested -> for_each( mrViewContainer )
     118             :         //    II. update some views requested -> for_each( maViewUpdateRequests )
     119             : 
     120             :         // (c) ViewUpdate-triggered update - update all views
     121             : 
     122             : 
     123             :         // any ViewUpdate-triggered updates?
     124             :         const bool bViewUpdatesNeeded(
     125           0 :             mpImpl->maUpdaters.apply(
     126           0 :                 boost::mem_fn(&ViewUpdate::needsUpdate)) );
     127             : 
     128           0 :         if( bViewUpdatesNeeded )
     129             :         {
     130           0 :             mpImpl->maUpdaters.applyAll(
     131           0 :                 boost::mem_fn((bool (ViewUpdate::*)())&ViewUpdate::update) );
     132             :         }
     133             : 
     134           0 :         if( bViewUpdatesNeeded ||
     135           0 :             mpImpl->mbUpdateAllRequest )
     136             :         {
     137             :             // unconditionally update all views
     138           0 :             std::for_each( mpImpl->mrViewContainer.begin(),
     139           0 :                            mpImpl->mrViewContainer.end(),
     140           0 :                            mpImpl->mbViewClobbered ?
     141           0 :                            boost::mem_fn(&View::paintScreen) :
     142           0 :                            boost::mem_fn(&View::updateScreen) );
     143             :         }
     144           0 :         else if( !mpImpl->maViewUpdateRequests.empty() )
     145             :         {
     146             :             // update notified views only
     147             :             UpdateRequestVector::const_iterator aIter(
     148           0 :                 mpImpl->maViewUpdateRequests.begin() );
     149             :             const UpdateRequestVector::const_iterator aEnd(
     150           0 :                 mpImpl->maViewUpdateRequests.end() );
     151           0 :             while( aIter != aEnd )
     152             :             {
     153             :                 // TODO(P1): this is O(n^2) in the number of views, if
     154             :                 // lots of views notify updates.
     155             :                 const UnoViewVector::const_iterator aEndOfViews(
     156           0 :                     mpImpl->mrViewContainer.end() );
     157           0 :                 UnoViewVector::const_iterator aFoundView;
     158           0 :                 if( (aFoundView=std::find(mpImpl->mrViewContainer.begin(),
     159             :                                           aEndOfViews,
     160           0 :                                           aIter->first)) != aEndOfViews )
     161             :                 {
     162           0 :                     if( aIter->second )
     163           0 :                         (*aFoundView)->paintScreen(); // force-paint
     164             :                     else
     165           0 :                         (*aFoundView)->updateScreen(); // update changes only
     166             :                 }
     167             : 
     168           0 :                 ++aIter;
     169             :             }
     170             :         }
     171             : 
     172             :         // done - clear requests
     173           0 :         mpImpl->mbViewClobbered = false;
     174           0 :         mpImpl->mbUpdateAllRequest = false;
     175           0 :         UpdateRequestVector().swap( mpImpl->maViewUpdateRequests );
     176             :     }
     177             : 
     178           0 :     void ScreenUpdater::addViewUpdate( ViewUpdateSharedPtr const& rViewUpdate )
     179             :     {
     180           0 :         mpImpl->maUpdaters.add( rViewUpdate );
     181           0 :     }
     182             : 
     183           0 :     void ScreenUpdater::removeViewUpdate( ViewUpdateSharedPtr const& rViewUpdate )
     184             :     {
     185           0 :         mpImpl->maUpdaters.remove( rViewUpdate );
     186           0 :     }
     187             : 
     188           0 :     void ScreenUpdater::requestImmediateUpdate()
     189             :     {
     190           0 :         if (mpImpl->mnLockCount > 0)
     191           0 :             return;
     192             : 
     193             :         // TODO(F2): This will interfere with other updates, since it
     194             :         // happens out-of-sync with main animation loop. Might cause
     195             :         // artifacts.
     196           0 :         std::for_each( mpImpl->mrViewContainer.begin(),
     197           0 :                        mpImpl->mrViewContainer.end(),
     198           0 :                        boost::mem_fn(&View::updateScreen) );
     199             :     }
     200             : 
     201           0 :     void ScreenUpdater::lockUpdates (void)
     202             :     {
     203           0 :         ++mpImpl->mnLockCount;
     204             :         OSL_ASSERT(mpImpl->mnLockCount>0);
     205           0 :     }
     206             : 
     207           0 :     void ScreenUpdater::unlockUpdates (void)
     208             :     {
     209             :         OSL_ASSERT(mpImpl->mnLockCount>0);
     210           0 :         if (mpImpl->mnLockCount > 0)
     211             :         {
     212           0 :             --mpImpl->mnLockCount;
     213           0 :             if (mpImpl->mnLockCount)
     214           0 :                 commitUpdates();
     215             :         }
     216           0 :     }
     217             : 
     218           0 :     ::boost::shared_ptr<ScreenUpdater::UpdateLock> ScreenUpdater::createLock (const bool bStartLocked)
     219             :     {
     220           0 :         return ::boost::shared_ptr<ScreenUpdater::UpdateLock>(new ::UpdateLock(*this, bStartLocked));
     221             :     }
     222             : 
     223             : 
     224             : } // namespace internal
     225             : } // namespace slideshow
     226             : 
     227             : namespace {
     228             : 
     229           0 : UpdateLock::UpdateLock (
     230             :     ::slideshow::internal::ScreenUpdater& rUpdater,
     231             :     const bool bStartLocked)
     232             :     : mrUpdater(rUpdater),
     233           0 :       mbIsActivated(false)
     234             : {
     235           0 :     if (bStartLocked)
     236           0 :         Activate();
     237           0 : }
     238             : 
     239             : 
     240             : 
     241             : 
     242           0 : UpdateLock::~UpdateLock (void)
     243             : {
     244           0 :     if (mbIsActivated)
     245           0 :         mrUpdater.unlockUpdates();
     246           0 : }
     247             : 
     248             : 
     249             : 
     250             : 
     251           0 : void UpdateLock::Activate (void)
     252             : {
     253           0 :     if ( ! mbIsActivated)
     254             :     {
     255           0 :         mbIsActivated = true;
     256           0 :         mrUpdater.lockUpdates();
     257             :     }
     258           0 : }
     259             : 
     260             : }
     261             : 
     262             : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */

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