/*

* Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

*

* Redistribution and use in source and binary forms, with or without

* modification, are permitted provided that the following conditions are met:

*

* - Redistributions of source code must retain the above copyright notice,

*   this list of conditions and the following disclaimer.

* - Redistributions in binary form must reproduce the above copyright notice,

*   this list of conditions and the following disclaimer in the documentation

*   and/or other materials provided with the distribution.

* - Neither the name of Nokia Corporation nor the names of its contributors

*   may be used to endorse or promote products derived from this software

*   without specific prior written permission.

*

* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"

* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE

* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR

* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF

* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS

* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN

* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

* POSSIBILITY OF SUCH DAMAGE.

* 

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description: 

*

*/

using System;

using System.Drawing;

using System.Collections;

using HeapLib;

using HeapLib.Cells;

using HeapLib.Array;

using HeapLib.Relationships;

using HeapLib.Reconstructor;

using HeapCtrlLib.Interfaces;

using HeapCtrlLib.Utilities;

using HeapCtrlLib.Renderers;

using HeapCtrlLib.Renderers.Contents.Bases;

using SymbianUtils.Colour;

using SymbianUtils.Graphics;

using SymbianUtils.RawItems;

namespace HeapCtrlLib.Renderers.Contents

{

    internal class HeapCellRendererColourByEmbeddedReferences : HeapCellRendererByColour, IHeapCellRendererContent 

    {

        #region Constructors & destructor

        public HeapCellRendererColourByEmbeddedReferences()

        {

        }

        #endregion

        #region From IHeapCellRendererContent

        public void Initialise( HeapCellArray aCells, HeapReconstructor aReconstructor, HeapDataRenderer aRenderer )

        {

            if  ( aReconstructor != null )

            {

                int min = aReconstructor.Statistics.StatsAllocated.CellNumberOfEmbeddedReferencesLeast.RelationshipManager.EmbeddedReferencesTo.Count + 1;

                double logMin = Math.Log( (double) min );

                //

                int max = aReconstructor.Statistics.StatsAllocated.CellNumberOfEmbeddedReferencesMost.RelationshipManager.EmbeddedReferencesTo.Count + 1;

                double logMax = Math.Log( (double) max );

                iDomain = (float) ( logMax - logMin ); 

            }

        }

        public void PrepareToNavigate( HeapRenderingNavigator aNavigator )

        {

            iLargestRectangleCalculator = new HeapCellLargestRectangleCalculator( aNavigator, 1 /* skip first box, start at 2nd box which has index 1 */ );

        }

        public void HeapCellRenderingComplete( Graphics aGraphics, HeapCell aCell, HeapCellMetaData aMetaData )

        {

            Color fillColour = ColourForHeapCell( aCell );

            //

            string text = aCell.SymbolStringWithoutDescriptorPrefix;

            PaintBoxedTextWithLuminanceHandling( text, aGraphics, fillColour );

        }

        public void RenderingComplete( Graphics aGraphics )

        {

        }

        public void PaintContent( Graphics aGraphics, HeapCellMetaData aMetaData, HeapCell aCell, uint aAddress, Point aPosition, Size aBoxSize, Size aPaddingSize )

        {

            // Get the cell colour that is associated with the cell symbol object type

            aMetaData.CellBoxColor = ColourForHeapCell( aCell );

            SymRect boxRect = new SymRect( aPosition, aBoxSize );

            boxRect.HalfOffset( aPaddingSize );

            // Draw actual cell

            using ( SolidBrush brush = new SolidBrush( aMetaData.CellBoxColor ) )

            {

                aGraphics.FillRectangle( brush, boxRect.Rectangle );

            }

            HeapCell.TRegion region = aMetaData.Region;

            if ( region == HeapCell.TRegion.EHeader && aMetaData.CellBoxIndex == 0 )

            {

                // If first box, we show the number of inwards links to the cell

                boxRect.Inflate( KShrinkSize, KShrinkSize );

                // Draw the fill

                Color lightenColor = ColourUtils.Lighten( aMetaData.CellBoxColor );

                using ( SolidBrush brush = new SolidBrush( lightenColor ) )

                {

                    aGraphics.FillRectangle( brush, boxRect.Rectangle );

                }

                lightenColor = ColourUtils.Lighten( lightenColor );

                using ( Pen borderPen = new Pen( lightenColor, KHeaderBoxWidth ) )

                {

                    aGraphics.DrawRectangle( borderPen, boxRect.Rectangle );

                }

                // Draw the count

                PaintBoxedTextWithLuminanceHandling( aCell.RelationshipManager.EmbeddedReferencesTo.Count.ToString(), aGraphics, Color.Black, boxRect );

            }

            else

            {

                // If we're in the payload section, then get the raw item corresponding to the address we are drawing

                RawItem rawItem = aMetaData.RawItem;

                if ( rawItem != null && rawItem.Tag != null && rawItem.Tag is HeapLib.Relationships.RelationshipInfo )

                {

                    RelationshipInfo relInfo = (RelationshipInfo) rawItem.Tag;

                    // Make the box a bit smaller

                    boxRect.Inflate( KShrinkSize, KShrinkSize );

                    // Draw the fill

                    Color lightenColor = ColourUtils.Lighten( aMetaData.CellBoxColor );

                    using ( SolidBrush brush = new SolidBrush( lightenColor ) )

                    {

                        aGraphics.FillRectangle( brush, boxRect.Rectangle );

                    }

                    lightenColor = ColourUtils.Lighten( lightenColor );

                    using ( Pen borderPen = new Pen( lightenColor, KHeaderBoxWidth ) )

                    {

                        aGraphics.DrawRectangle( borderPen, boxRect.Rectangle );

                        // If it's a clean reference, then draw a diagonal line to decorate the box reference

                        if ( relInfo.IsCleanLink )

                        {

                            Point linePosStart = boxRect.TopLeft;

                            linePosStart.X += KHeaderBoxLineCornerOffset;

                            Point linePosEnd = boxRect.TopLeft;

                            linePosEnd.Y += KHeaderBoxLineCornerOffset;

                            //

                            aGraphics.DrawLine( borderPen, linePosStart, linePosEnd );

                        }

                   }

                }

            }

        }

        public bool SupportsFiltering

        {

            get { return false; }

        }

        public void SetupFilters()

        {

        }

        #endregion

        #region Internal methods

        private Color ColourForHeapCell( HeapCell aCell )

        {

            Color ret = KBaselineColourDescriptor;

            //

            if ( !aCell.IsDescriptor )

            {

                float rF = KRampBaselineColourStart.R;

                float gF = KRampBaselineColourStart.G;

                float bF = KRampBaselineColourStart.B;

                //

                float count = aCell.RelationshipManager.EmbeddedReferencesTo.Count + 1.0f;

                float val = (float) Math.Log( count );

                val /= iDomain;

                //

                rF += ( ( KRampBaselineColourEnd.R - KRampBaselineColourStart.R ) * val );

                gF += ( ( KRampBaselineColourEnd.G - KRampBaselineColourStart.G ) * val );

                bF += ( ( KRampBaselineColourEnd.B - KRampBaselineColourStart.B ) * val );

                //

                int r = Math.Min( Math.Max( 0, (int) rF ), 255 );

                int g = Math.Min( Math.Max( 0, (int) gF ), 255 );

                int b = Math.Min( Math.Max( 0, (int) bF ), 255 );

                //

                return System.Drawing.Color.FromArgb( r, g, b );

            }

            //

            return ret;

        }

        #endregion

        #region Internal constants

        private const int KHeaderBoxLineCornerOffset = 5;

        private const int KShrinkSize = -3;

        private const float KBorderLightenAmount = 0.2f;

        private const float KHeaderBoxWidth = 2.0f;

        private Color KRampBaselineColourStart = Color.LightBlue;

        private Color KRampBaselineColourEnd = Color.Red;

        private Color KBaselineColourDescriptor = Color.Gold;

        #endregion

        #region Data members

        private float iDomain = 0.01f;

        #endregion

    }

}