/**************************************************************
 * 
 * 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.
 * 
 *************************************************************/


// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_drawinglayer.hxx"

#include <drawinglayer/attribute/strokeattribute.hxx>
#include <numeric>

//////////////////////////////////////////////////////////////////////////////

namespace drawinglayer
{
	namespace attribute
	{
		class ImpStrokeAttribute
		{
        public:
		    // refcounter
		    sal_uInt32								mnRefCount;

            // data definitions
			::std::vector< double >						maDotDashArray;			// array of double which defines the dot-dash pattern
			double										mfFullDotDashLen;		// sum of maDotDashArray (for convenience)

			ImpStrokeAttribute(
				const ::std::vector< double >& rDotDashArray,
				double fFullDotDashLen)
		    :	mnRefCount(0),
				maDotDashArray(rDotDashArray),
				mfFullDotDashLen(fFullDotDashLen)
			{
			}

			// data read access
			const ::std::vector< double >& getDotDashArray() const { return maDotDashArray; }
            double getFullDotDashLen() const 
            {
                if(0.0 == mfFullDotDashLen && maDotDashArray.size())
                {
                    // calculate length on demand
                    const double fAccumulated(::std::accumulate(maDotDashArray.begin(), maDotDashArray.end(), 0.0));
                    const_cast< ImpStrokeAttribute* >(this)->mfFullDotDashLen = fAccumulated;
                }

                return mfFullDotDashLen; 
            }

            bool operator==(const ImpStrokeAttribute& rCandidate) const
			{
				return (getDotDashArray() == rCandidate.getDotDashArray()
                    && getFullDotDashLen() == rCandidate.getFullDotDashLen());
			}
            
            static ImpStrokeAttribute* get_global_default()
            {
                static ImpStrokeAttribute* pDefault = 0;

                if(!pDefault)
                {
                    pDefault = new ImpStrokeAttribute(
			            std::vector< double >(),
			            0.0);

                    // never delete; start with RefCount 1, not 0
    			    pDefault->mnRefCount++;
                }

                return pDefault;
            }
		};

        StrokeAttribute::StrokeAttribute(
			const ::std::vector< double >& rDotDashArray,
			double fFullDotDashLen)
		:	mpStrokeAttribute(new ImpStrokeAttribute(
                rDotDashArray, fFullDotDashLen))
		{
		}

		StrokeAttribute::StrokeAttribute()
        :	mpStrokeAttribute(ImpStrokeAttribute::get_global_default())
		{
			mpStrokeAttribute->mnRefCount++;
		}

        StrokeAttribute::StrokeAttribute(const StrokeAttribute& rCandidate)
		:	mpStrokeAttribute(rCandidate.mpStrokeAttribute)
		{
			mpStrokeAttribute->mnRefCount++;
		}

		StrokeAttribute::~StrokeAttribute()
		{
			if(mpStrokeAttribute->mnRefCount)
			{
				mpStrokeAttribute->mnRefCount--;
			}
			else
			{
				delete mpStrokeAttribute;
			}
		}

        bool StrokeAttribute::isDefault() const
        {
            return mpStrokeAttribute == ImpStrokeAttribute::get_global_default();
        }

        StrokeAttribute& StrokeAttribute::operator=(const StrokeAttribute& rCandidate)
		{
			if(rCandidate.mpStrokeAttribute != mpStrokeAttribute)
			{
				if(mpStrokeAttribute->mnRefCount)
				{
					mpStrokeAttribute->mnRefCount--;
				}
				else
				{
					delete mpStrokeAttribute;
				}
				
				mpStrokeAttribute = rCandidate.mpStrokeAttribute;
				mpStrokeAttribute->mnRefCount++;
			}

			return *this;
		}

        bool StrokeAttribute::operator==(const StrokeAttribute& rCandidate) const
		{
			if(rCandidate.mpStrokeAttribute == mpStrokeAttribute)
			{
				return true;
			}

			if(rCandidate.isDefault() != isDefault())
			{
				return false;
			}

			return (*rCandidate.mpStrokeAttribute == *mpStrokeAttribute);
		}

        const ::std::vector< double >& StrokeAttribute::getDotDashArray() const 
        { 
            return mpStrokeAttribute->getDotDashArray(); 
        }

		double StrokeAttribute::getFullDotDashLen() const
        { 
            return mpStrokeAttribute->getFullDotDashLen(); 
        }
	} // end of namespace attribute
} // end of namespace drawinglayer

//////////////////////////////////////////////////////////////////////////////
// eof