/**************************************************************
 * 
 * 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
 * 
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 * 
 *************************************************************/


#include "oox/helper/progressbar.hxx"

#include <com/sun/star/task/XStatusIndicator.hpp>
#include "oox/helper/helper.hxx"

namespace oox {

// ============================================================================

using namespace ::com::sun::star::task;
using namespace ::com::sun::star::uno;

using ::rtl::OUString;

namespace {

const sal_Int32 PROGRESS_RANGE      = 1000000;

} // namespace

// ============================================================================

IProgressBar::~IProgressBar()
{
}

// ----------------------------------------------------------------------------

ISegmentProgressBar::~ISegmentProgressBar()
{
}

// ============================================================================
// ============================================================================

ProgressBar::ProgressBar( const Reference< XStatusIndicator >& rxIndicator, const OUString& rText ) :
    mxIndicator( rxIndicator ),
    mfPosition( 0 )
{
    if( mxIndicator.is() )
        mxIndicator->start( rText, PROGRESS_RANGE );
}

ProgressBar::~ProgressBar()
{
    if( mxIndicator.is() )
        mxIndicator->end();
}

double ProgressBar::getPosition() const
{
    return mfPosition;
}

void ProgressBar::setPosition( double fPosition )
{
    OSL_ENSURE( (mfPosition <= fPosition) && (fPosition <= 1.0), "ProgressBar::setPosition - invalid position" );
    mfPosition = getLimitedValue< double >( fPosition, mfPosition, 1.0 );
    if( mxIndicator.is() )
        mxIndicator->setValue( static_cast< sal_Int32 >( mfPosition * PROGRESS_RANGE ) );
}

// ============================================================================

namespace prv {

class SubSegment : public ISegmentProgressBar
{
public:
    explicit            SubSegment( IProgressBar& rParentProgress, double fStartPos, double fLength );

    virtual double      getPosition() const;
    virtual void        setPosition( double fPosition );

    virtual double      getFreeLength() const;
    virtual ISegmentProgressBarRef createSegment( double fLength );

private:
    IProgressBar&       mrParentProgress;
    double              mfStartPos;
    double              mfLength;
    double              mfPosition;
    double              mfFreeStart;
};

// ----------------------------------------------------------------------------

SubSegment::SubSegment( IProgressBar& rParentProgress, double fStartPos, double fLength ) :
    mrParentProgress( rParentProgress ),
    mfStartPos( fStartPos ),
    mfLength( fLength ),
    mfPosition( 0.0 ),
    mfFreeStart( 0.0 )
{
}

double SubSegment::getPosition() const
{
    return mfPosition;
}

void SubSegment::setPosition( double fPosition )
{
    OSL_ENSURE( (mfPosition <= fPosition) && (fPosition <= 1.0), "SubSegment::setPosition - invalid position" );
    mfPosition = getLimitedValue< double >( fPosition, mfPosition, 1.0 );
    mrParentProgress.setPosition( mfStartPos + mfPosition * mfLength );
}

double SubSegment::getFreeLength() const
{
    return 1.0 - mfFreeStart;
}

ISegmentProgressBarRef SubSegment::createSegment( double fLength )
{
    OSL_ENSURE( (0.0 < fLength) && (fLength <= getFreeLength()), "SubSegment::createSegment - invalid length" );
    fLength = getLimitedValue< double >( fLength, 0.0, getFreeLength() );
    ISegmentProgressBarRef xSegment( new prv::SubSegment( *this, mfFreeStart, fLength ) );
    mfFreeStart += fLength;
    return xSegment;
}

} // namespace prv

// ============================================================================

SegmentProgressBar::SegmentProgressBar( const Reference< XStatusIndicator >& rxIndicator, const OUString& rText ) :
    maProgress( rxIndicator, rText ),
    mfFreeStart( 0.0 )
{
}

double SegmentProgressBar::getPosition() const
{
    return maProgress.getPosition();
}

void SegmentProgressBar::setPosition( double fPosition )
{
    maProgress.setPosition( fPosition );
}

double SegmentProgressBar::getFreeLength() const
{
    return 1.0 - mfFreeStart;
}

ISegmentProgressBarRef SegmentProgressBar::createSegment( double fLength )
{
    OSL_ENSURE( (0.0 < fLength) && (fLength <= getFreeLength()), "SegmentProgressBar::createSegment - invalid length" );
    fLength = getLimitedValue< double >( fLength, 0.0, getFreeLength() );
    ISegmentProgressBarRef xSegment( new prv::SubSegment( maProgress, mfFreeStart, fLength ) );
    mfFreeStart += fLength;
    return xSegment;
}

// ============================================================================

} // namespace oox