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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 <sal/config.h>
#include <utility>
#include "model/SlideSorterModel.hxx"
#include "model/SlsPageDescriptor.hxx"
using namespace ::sd::slidesorter;
using namespace ::sd::slidesorter::model;
namespace {
class PageEnumerationImpl
: public Enumeration<SharedPageDescriptor>
{
public:
inline PageEnumerationImpl (
const SlideSorterModel& rModel,
const PageEnumeration::PagePredicate& rPredicate);
virtual ~PageEnumerationImpl();
PageEnumerationImpl(const PageEnumerationImpl&) = delete;
PageEnumerationImpl& operator=(const PageEnumerationImpl&) = delete;
/** Create a copy of the called enumeration object.
*/
virtual ::std::unique_ptr<Enumeration<SharedPageDescriptor> > Clone() override;
virtual bool HasMoreElements() const override;
virtual SharedPageDescriptor GetNextElement() override;
virtual void Rewind() override;
private:
const SlideSorterModel& mrModel;
const PageEnumeration::PagePredicate maPredicate;
int mnIndex;
/** This constructor sets the internal page index to the given value.
It does not call AdvanceToNextValidElement() to skip elements that
do not fulfill Predicate.
*/
inline PageEnumerationImpl (
const SlideSorterModel& rModel,
const PageEnumeration::PagePredicate& rPredicate,
int nIndex);
/** Skip all elements that do not fulfill Predicate starting with the
one pointed to by mnIndex.
*/
inline void AdvanceToNextValidElement();
};
} // end of anonymouse namespace
namespace sd { namespace slidesorter { namespace model {
PageEnumeration PageEnumeration::Create (
const SlideSorterModel& rModel,
const PagePredicate& rPredicate)
{
return PageEnumeration(::std::unique_ptr<Enumeration<SharedPageDescriptor> >(
new PageEnumerationImpl(rModel, rPredicate)));
}
PageEnumeration::PageEnumeration (
::std::unique_ptr<Enumeration<SharedPageDescriptor> > && pImpl)
: mpImpl(std::move(pImpl))
{
}
PageEnumeration::PageEnumeration (const PageEnumeration& rEnumeration )
: sd::slidesorter::model::Enumeration<sd::slidesorter::model::SharedPageDescriptor>()
{
mpImpl = rEnumeration.mpImpl->Clone();
}
PageEnumeration::~PageEnumeration()
{
}
PageEnumeration& PageEnumeration::operator= (
const PageEnumeration& rEnumeration)
{
mpImpl = rEnumeration.mpImpl->Clone();
return *this;
}
::std::unique_ptr<Enumeration<SharedPageDescriptor> > PageEnumeration::Clone()
{
return ::std::unique_ptr<Enumeration<SharedPageDescriptor> >(
new PageEnumeration (*this));
}
bool PageEnumeration::HasMoreElements() const
{
return mpImpl->HasMoreElements();
}
SharedPageDescriptor PageEnumeration::GetNextElement()
{
return mpImpl->GetNextElement();
}
void PageEnumeration::Rewind()
{
return mpImpl->Rewind();
}
} } } // end of namespace ::sd::slidesorter::model
namespace {
PageEnumerationImpl::PageEnumerationImpl (
const SlideSorterModel& rModel,
const PageEnumeration::PagePredicate& rPredicate)
: mrModel(rModel),
maPredicate(rPredicate),
mnIndex(0)
{
Rewind();
}
PageEnumerationImpl::PageEnumerationImpl (
const SlideSorterModel& rModel,
const PageEnumeration::PagePredicate& rPredicate,
int nIndex)
: mrModel(rModel),
maPredicate(rPredicate),
mnIndex(nIndex)
{
}
PageEnumerationImpl::~PageEnumerationImpl()
{
}
::std::unique_ptr<Enumeration<SharedPageDescriptor> >
PageEnumerationImpl::Clone()
{
return ::std::unique_ptr<Enumeration<SharedPageDescriptor> >(
new PageEnumerationImpl(mrModel,maPredicate,mnIndex));
}
bool PageEnumerationImpl::HasMoreElements() const
{
return (mnIndex < mrModel.GetPageCount());
}
SharedPageDescriptor PageEnumerationImpl::GetNextElement()
{
SharedPageDescriptor pDescriptor (mrModel.GetPageDescriptor(mnIndex));
// Go to the following valid element.
mnIndex += 1;
AdvanceToNextValidElement();
return pDescriptor;
}
void PageEnumerationImpl::Rewind()
{
// Go to first valid element.
mnIndex = 0;
AdvanceToNextValidElement();
}
void PageEnumerationImpl::AdvanceToNextValidElement()
{
while (mnIndex < mrModel.GetPageCount())
{
SharedPageDescriptor pDescriptor (mrModel.GetPageDescriptor(mnIndex));
// Test for the predicate being fulfilled.
if (pDescriptor.get()!=nullptr && maPredicate(pDescriptor))
{
// This predicate is valid.
break;
}
else
{
// Advance to next predicate.
mnIndex += 1;
}
}
}
} // end of anonymous namespace
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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