linedef.cpp

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// $Id: linedef.cpp 1735 2006-09-04 10:03:55Z luke $
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 */

// The line definition class implementation.  An abstract base class from which to
// derive the definitions of things like strokes, brushes.

#include "camtypes.h"
#include "linedef.h"
#include "colormgr.h"
//#include "spread.h" - in camtypes.h [AUTOMATICALLY REMOVED]

CC_IMPLEMENT_DYNAMIC(LineDefinition, CCObject)



/********************************************************************************************

>   LineDefinition::LineDefinition()

    Author:     Diccon_Yamanaka (Xara Group Ltd) <camelotdev@xara.com>
    Created:    27/2/97

    Purpose:    default constructor, please don't use it though, i am only keeping it around so 
                I can integrate the StrokeDefinition stuff

********************************************************************************************/

LineDefinition::LineDefinition()
{
    // set to NULL or else CascadeDelete fails in the destructor
    m_pTree = NULL;
}

/********************************************************************************************

>   LineDefinition::LineDefinition(Node *pLineTree);

    Author:     Diccon_Yamanaka (Xara Group Ltd) <camelotdev@xara.com>
    Created:    27/2/97

    Inputs:     pLineTree - A pointer to a Spread node which is the root of a clipart
                              subtree which should be used for this Line definition. It
                              must obey these rules:
                                * It must be a Spread
                                * It must not be linked into any other parent tree structure
                                * It should contain at least one path node (or else the Line
                                  will appear "blank"). You should do Make Shapes on the 
                                  subtree so that text, blends, quickshapes, etc are all in
                                  path form
                                * It should be attribute complete, or close thereto

    Purpose:    Constructor

    SeeAlso:    LineComponent::AddNewLine

********************************************************************************************/

LineDefinition::LineDefinition(Node *pLineTree)
{
    ERROR3IF(pLineTree == NULL, "Illegal NULL param");
    ERROR3IF(!pLineTree->IsSpread(), "LineDefinitions must begin with a Spread (for now, at least)");
    ERROR3IF(pLineTree->FindParent() != NULL, "Line Definition looks like it's linked into a tree!");

    m_pTree   = pLineTree;

    // Check the subtree to see if it contains any transparency
    m_bNeedsTrans = m_pTree->ChildrenNeedTransparency();

    IOStore = 0;

    m_Name = TEXT("Custom line");

    m_bOverridesFill  = FALSE;
    m_bOverridesTrans = FALSE;
}



/********************************************************************************************

>   LineDefinition::~LineDefinition()

    Author:     Diccon_Yamanaka (Xara Group Ltd) <camelotdev@xara.com>
    Created:    27/2/97

    Purpose:    Destructor

********************************************************************************************/

LineDefinition::~LineDefinition()
{
    if (m_pTree != NULL)
    {
        m_pTree->CascadeDelete();
        delete m_pTree;
    }
}



/********************************************************************************************

>   void LineDefinition::SetLineName(StringBase *pName)

    Author:     Diccon_Yamanaka (Xara Group Ltd) <camelotdev@xara.com>
    Created:    5/3/97

    Purpose:    Sets the name text string for this Line

********************************************************************************************/

void LineDefinition::SetLineName(StringBase *pName)
{
    ERROR3IF(pName == NULL, "Illegal NULL param");

    pName->Left(&m_Name, 31);
}



/********************************************************************************************

>   virtual BOOL LineDefinition::NeedsTransparency() const

    Author:     Diccon_Yamanaka (Xara Group Ltd) <camelotdev@xara.com>
    Created:    4/3/97

    Returns:    TRUE if this Line needs transparency in order to render

    Purpose:    Determine if this Line needs transparency in order to render.

********************************************************************************************/

BOOL LineDefinition::NeedsTransparency() const
{
    return(m_bNeedsTrans);
}


/********************************************************************************************

>   static void LineDefinition::ConvertIndexedColours(Node* pRoot) 

    Author:     Diccon_Yamanaka (Xara Group Ltd) <camelotdev@xara.com>
    Created:    4/3/97
    Inputs :    pRoot - the root of the subtree that is about to passed in to create a linedef
                Note that this node must actually be a SPREAD, as that is what we expect
    Ouputs:     pSpread with all its indexed colours converted to local doccolours
    Returns:    -

    Purpose:    To convert all the colours in the subtree that we wish to use to make a 
                brush definition
********************************************************************************************/

void LineDefinition::ConvertIndexedColours(Spread* pRoot)
{
    if (pRoot == NULL)
    {
        ERROR3("Spread is NULL");
        return;
    }
    // start at the layer
    Node* pNode = pRoot->FindFirstChild();
    pNode = pNode->FindFirstChild();

    // traverse across the layer
    while (pNode != NULL)
    {
        // search depth first as we may have a group
        Node *pCurNode = pNode->FindFirstDepthFirst();
        Node *pNextNode;

        while (pCurNode !=NULL)
        {
            // We may be about to chop this node out of the tree, so get the next node now
            pNextNode = pCurNode->FindNextDepthFirst(pNode);
    
            // Use to scan the colour fields of the attribute.
            if (pCurNode->IsAnAttribute())
            {
                UINT32 Context = 0;
                NodeAttribute *pNodeAttr = (NodeAttribute *) pCurNode;

                // Get the next colour field from the attribute
                DocColour *pColour = pNodeAttr->EnumerateColourFields(Context++);
                
                while (pColour != NULL)
                {
                    // For each colour field, make sure the colour is a local DocColour so that
                    // the sub-tree is entirely stand-alone
                    IndexedColour* pIndexCol = pColour->FindParentIndexedColour();
                    if (pIndexCol != NULL)
                    {
                        ColourGeneric ColDef;
                        ColourContext *cc = ColourManager::GetColourContext(pColour->GetColourModel());
                        ERROR3IF(cc == NULL, "Can't find colour context?!");

                        // Get the IndexedColour definition as a standalone colour definition
                        cc->ConvertColour(pIndexCol, &ColDef);

                        // Make the DocColour into a simple standalone "lookalike" of the parent colour
                        *pColour = DocColour(pColour->GetColourModel(), &ColDef);

                        // if the parent colour was named then set the reserved flag
                        if (pIndexCol->IsNamed())
                            pColour->SetReservedFlag(COL_NAMED);
                    }
                        pColour = pNodeAttr->EnumerateColourFields(Context++);
                }
            }
            pCurNode = pNextNode;
        }
        
        pNode = pNode->FindNext(CC_RUNTIME_CLASS(NodeRenderableInk));
    }
}

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