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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0 .
*/
#include "MasterPageContainerQueue.hxx"
#include "MasterPageContainerProviders.hxx"
#include <tools/IdleDetection.hxx>
#include <set>
namespace sd::sidebar {
const sal_Int32 MasterPageContainerQueue::snDelayedCreationTimeout (15);
const sal_Int32 MasterPageContainerQueue::snDelayedCreationTimeoutWhenNotIdle (100);
const sal_Int32 MasterPageContainerQueue::snMasterPagePriorityBoost (5);
const sal_Int32 MasterPageContainerQueue::snWaitForMoreRequestsPriorityThreshold (-10);
sal_uInt32 MasterPageContainerQueue::snWaitForMoreRequestsCount(15);
//===== MasterPageContainerQueue::PreviewCreationRequest ======================
class MasterPageContainerQueue::PreviewCreationRequest
{
public:
PreviewCreationRequest (const SharedMasterPageDescriptor& rpDescriptor, int nPriority)
: mpDescriptor(rpDescriptor),
mnPriority(nPriority)
{}
SharedMasterPageDescriptor mpDescriptor;
int mnPriority;
class Compare
{
public:
bool operator() (const PreviewCreationRequest& r1,const PreviewCreationRequest& r2) const
{
if (r1.mnPriority != r2.mnPriority)
{
// Prefer requests with higher priority.
return r1.mnPriority > r2.mnPriority;
}
else
{
// Prefer tokens that have been earlier created (those with lower
// value).
return r1.mpDescriptor->maToken < r2.mpDescriptor->maToken;
}
}
};
class CompareToken
{
public:
MasterPageContainer::Token maToken;
explicit CompareToken(MasterPageContainer::Token aToken) : maToken(aToken) {}
bool operator() (const PreviewCreationRequest& rRequest) const
{ return maToken==rRequest.mpDescriptor->maToken; }
};
};
//===== MasterPageContainerQueue::RequestQueue ================================
class MasterPageContainerQueue::RequestQueue
: public ::std::set<PreviewCreationRequest,PreviewCreationRequest::Compare>
{
public:
RequestQueue() {}
};
//===== MasterPageContainerQueue ==============================================
MasterPageContainerQueue* MasterPageContainerQueue::Create (
const std::weak_ptr<ContainerAdapter>& rpContainer)
{
MasterPageContainerQueue* pQueue = new MasterPageContainerQueue(rpContainer);
pQueue->LateInit();
return pQueue;
}
MasterPageContainerQueue::MasterPageContainerQueue (
const std::weak_ptr<ContainerAdapter>& rpContainer)
: mpWeakContainer(rpContainer),
mpRequestQueue(new RequestQueue()),
maDelayedPreviewCreationTimer(),
mnRequestsServedCount(0)
{
}
MasterPageContainerQueue::~MasterPageContainerQueue()
{
maDelayedPreviewCreationTimer.Stop();
while ( ! mpRequestQueue->empty())
mpRequestQueue->erase(mpRequestQueue->begin());
}
void MasterPageContainerQueue::LateInit()
{
// Set up the timer for the delayed creation of preview bitmaps.
maDelayedPreviewCreationTimer.SetTimeout (snDelayedCreationTimeout);
maDelayedPreviewCreationTimer.SetInvokeHandler(
LINK(this,MasterPageContainerQueue,DelayedPreviewCreation) );
}
bool MasterPageContainerQueue::RequestPreview (const SharedMasterPageDescriptor& rpDescriptor)
{
bool bSuccess (false);
if (rpDescriptor.get() != nullptr
&& rpDescriptor->maLargePreview.GetSizePixel().Width() == 0)
{
sal_Int32 nPriority (CalculatePriority(rpDescriptor));
// Add a new or replace an existing request.
RequestQueue::iterator iRequest (::std::find_if(
mpRequestQueue->begin(),
mpRequestQueue->end(),
PreviewCreationRequest::CompareToken(rpDescriptor->maToken)));
// When a request for the same token exists then the lowest of the
// two priorities is used.
if (iRequest != mpRequestQueue->end())
if (iRequest->mnPriority < nPriority)
{
mpRequestQueue->erase(iRequest);
iRequest = mpRequestQueue->end();
}
// Add a new request when none exists (or has just been erased).
if (iRequest == mpRequestQueue->end())
{
mpRequestQueue->insert(PreviewCreationRequest(rpDescriptor,nPriority));
maDelayedPreviewCreationTimer.Start();
bSuccess = true;
}
}
return bSuccess;
}
sal_Int32 MasterPageContainerQueue::CalculatePriority (
const SharedMasterPageDescriptor& rpDescriptor)
{
sal_Int32 nPriority;
// The cost is used as a starting value.
int nCost (0);
if (rpDescriptor->mpPreviewProvider != nullptr)
{
nCost = rpDescriptor->mpPreviewProvider->GetCostIndex();
if (rpDescriptor->mpPreviewProvider->NeedsPageObject())
if (rpDescriptor->mpPageObjectProvider != nullptr)
nCost += rpDescriptor->mpPageObjectProvider->GetCostIndex();
}
// Its negative value is used so that requests with a low cost are
// preferred over those with high costs.
nPriority = -nCost;
// Add a term that introduces an order based on the appearance in the
// AllMasterPagesSelector.
nPriority -= rpDescriptor->maToken / 3;
// Process requests for the CurrentMasterPagesSelector first.
if (rpDescriptor->meOrigin == MasterPageContainer::MASTERPAGE)
nPriority += snMasterPagePriorityBoost;
return nPriority;
}
IMPL_LINK(MasterPageContainerQueue, DelayedPreviewCreation, Timer*, pTimer, void)
{
bool bIsShowingFullScreenShow (false);
bool bWaitForMoreRequests (false);
do
{
if (mpRequestQueue->empty())
break;
// First check whether the system is idle.
tools::IdleState nIdleState (tools::IdleDetection::GetIdleState(nullptr));
if (nIdleState != tools::IdleState::Idle)
{
if (nIdleState & tools::IdleState::FullScreenShowActive)
bIsShowingFullScreenShow = true;
break;
}
PreviewCreationRequest aRequest (*mpRequestQueue->begin());
// Check if the request should really be processed right now.
// Reasons to not do it are when its cost is high and not many other
// requests have been inserted into the queue that would otherwise
// be processed first.
if (aRequest.mnPriority < snWaitForMoreRequestsPriorityThreshold
&& (mnRequestsServedCount+mpRequestQueue->size() < snWaitForMoreRequestsCount))
{
// Wait for more requests before this one is processed. Note
// that the queue processing is not started anew when this
// method is left. That is done when the next request is
// inserted.
bWaitForMoreRequests = true;
break;
}
mpRequestQueue->erase(mpRequestQueue->begin());
if (aRequest.mpDescriptor.get() != nullptr)
{
mnRequestsServedCount += 1;
if ( ! mpWeakContainer.expired())
{
std::shared_ptr<ContainerAdapter> pContainer (mpWeakContainer);
if (pContainer != nullptr)
pContainer->UpdateDescriptor(aRequest.mpDescriptor,false,true,true);
}
}
}
while (false);
if (!mpRequestQueue->empty() && ! bWaitForMoreRequests)
{
int nTimeout (snDelayedCreationTimeout);
if (bIsShowingFullScreenShow)
nTimeout = snDelayedCreationTimeoutWhenNotIdle;
maDelayedPreviewCreationTimer.SetTimeout(nTimeout);
pTimer->Start();
}
}
bool MasterPageContainerQueue::HasRequest (MasterPageContainer::Token aToken) const
{
return std::any_of(
mpRequestQueue->begin(),
mpRequestQueue->end(),
PreviewCreationRequest::CompareToken(aToken));
}
bool MasterPageContainerQueue::IsEmpty() const
{
return mpRequestQueue->empty();
}
void MasterPageContainerQueue::ProcessAllRequests()
{
snWaitForMoreRequestsCount = 0;
if (!mpRequestQueue->empty())
maDelayedPreviewCreationTimer.Start();
}
} // end of namespace sd::sidebar
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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