opnode.cpp

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// $Id: opnode.cpp 1282 2006-06-09 09:46:49Z alex $
/* @@tag:xara-cn@@ DO NOT MODIFY THIS LINE
================================XARAHEADERSTART===========================
 
               Xara LX, a vector drawing and manipulation program.
                    Copyright (C) 1993-2006 Xara Group Ltd.
       Copyright on certain contributions may be held in joint with their
              respective authors. See AUTHORS file for details.

LICENSE TO USE AND MODIFY SOFTWARE
----------------------------------

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=================================XARAHEADEREND============================
 */
// Implementation of the node operations

#include "camtypes.h"
//#include "selop.h"     - in camtypes.h [AUTOMATICALLY REMOVED]
//#include "nodeattr.h"  - in camtypes.h [AUTOMATICALLY REMOVED]
#include "opnode.h" 

#include "objchge.h"    
//#include "app.h"   - in camtypes.h [AUTOMATICALLY REMOVED]
//#include "attrmgr.h"   - in camtypes.h [AUTOMATICALLY REMOVED]
//#include "tmpltres.h" 


DECLARE_SOURCE( "$Revision: 1282 $" );

CC_IMPLEMENT_DYNAMIC(RemoveAttributeParam, OpParam)
CC_IMPLEMENT_DYNCREATE(OpRemoveAttributeFromSelection, SelOperation)

#define new CAM_DEBUG_NEW


#define ENSURE_NOT_NULL(Pointer)        ERROR2IF(Pointer == NULL, 0, "NULL Args")
#ifndef VOID_ENSURE_NOT_NULL
#define VOID_ENSURE_NOT_NULL(p)     if (p == NULL) {    ERROR2RAW("NULL Args")  }
#endif
#define ENSURE_KIND(pNode, Kind)        ERROR3IF(!pNode->IS_KIND_OF(Kind), "pNode is not kind of " #Kind);

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

>   BOOL OpRemoveAttributeFromSelection::Declare()

    Author:     Colin_Barfoot (Xara Group Ltd) <camelotdev@xara.com> (from Will - I wish I hadn't)
    Created:    09/07/97

    Purpose:    Declares the OpDescriptor for OpRemoveAttributeFromSelection. Should be
                called on start up.

    Returns:    TRUE if the operation could be successfully initialised 
                FALSE if no more memory could be allocated 
                
********************************************************************************************/
BOOL OpRemoveAttributeFromSelection::Declare()
{
    
    // Register the opdescriptors for the OpRemoveAttributeFromSelection operation

    return (RegisterOpDescriptor(   0,
                                    _R(IDS_DELETEATTROP),
                                    CC_RUNTIME_CLASS(OpRemoveAttributeFromSelection),
                                    OPTOKEN_DELETEATTR,
                                    OpRemoveAttributeFromSelection::GetState,
                                    0,  /* help ID */
                                    0,
                                    0,
                                    0,
                                    SYSTEMBAR_ILLEGAL,          // For now !
                                    FALSE,                      // Receive messages
                                    FALSE,
                                    FALSE,
                                    0,
                                    0 // (GREY_WHEN_NO_CURRENT_DOC | GREY_WHEN_NO_SELECTION)
           )); 
}               


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

>   OpState OpRemoveAttributeFromSelection::GetState(String_256*, OpDescriptor* OpDesc)

    Author:     Colin_Barfoot (Xara Group Ltd) <camelotdev@xara.com> (from Will - I wish I hadn't)
    Created:    09/07/97

    Purpose:    For finding OpRemoveAttributeFromSelection state.

    Returns:    The state of the OpRemoveAttributeFromSelection operation

    Notes:      Always available cos it ain't in no menu
                
********************************************************************************************/
OpState OpRemoveAttributeFromSelection::GetState(String_256*, OpDescriptor* OpDesc)
{
    OpState OpSt;

    OpSt.Greyed = ( FALSE );  
                                                
    return(OpSt);   
}


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

>   virtual void OpRemoveAttributeFromSelection::GetOpName(String_256* OpName) 

    Author:     Colin_Barfoot (Xara Group Ltd) <camelotdev@xara.com> (from Will - I wish I hadn't)
    Created:    09/07/97

    Purpose:    The GetOpName fn is overridden so that we return back a description 
                appropriate to the type of attribute that the operation applies. 

    Outputs:    The undo string for the operation

********************************************************************************************/
void OpRemoveAttributeFromSelection::GetOpName(String_256* OpName) 
{ 
    *OpName += String_256(_R(IDS_ATTR_CHANGE));
}  


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

>   virtual void OpRemoveAttributeFromSelection::DoWithParam(OpDescriptor* pOpDesc, OpParam* pOpParam)

    Author:     Colin_Barfoot (Xara Group Ltd) <camelotdev@xara.com> (from Will - I wish I hadn't)
    Created:    09/07/97

    Purpose:    Performs the OpRemoveAttributeFromSelection operation.
                It removes all attributes with the given AttributeIdentifier from the
                selected objects.

    Inputs:     pOpDesc:    See base class
                pOpParam:   A RemoveAttributeParam containing the AttributeIdentifier of
                            the attributes to remove.

********************************************************************************************/
void OpRemoveAttributeFromSelection::DoWithParam(OpDescriptor* pOpDesc, OpParam* pOpParam)
{    
    VOID_ENSURE_NOT_NULL(pOpParam);
    ENSURE_KIND(pOpParam, RemoveAttributeParam);

    const RemoveAttributeParam* const pRemoveParam = (RemoveAttributeParam*)pOpParam;

    // Objects used to mark changed nodes, so that parents will update after attr replacement
    ObjChangeFlags cFlags;
    cFlags.Attribute    = TRUE;
    ObjChangeParam ObjChange(OBJCHANGE_STARTING,cFlags,NULL,this);

    BOOL Ok = TRUE;

    Ok = DoStartSelOp(FALSE, FALSE, FALSE, FALSE);  // FALSE's == don't render the blobs

    // Obtain the current selection
    SelRange* const pSelRange = GetApplication()->FindSelection();
    Ok = (pSelRange != NULL);

    if (Ok)
    {

        if (Ok)
        {
            Range CurrentSelection(*pSelRange);
            // Mark nodes that will allow this to happen, 
            // and error if no nodes will let it happen
    
            Ok = CurrentSelection.AllowOp(&ObjChange);
        }
    }

    if (Ok)
    {
        AttributeIdentifier AttrIDToDelete = pRemoveParam->GetAttrIDToDelete();

        Node* pNode = pSelRange->FindFirst();
        while (pNode != NULL && Ok)
        {
            NodeAttribute* const pAttr = FindAttributeOfClassID(pNode, AttrIDToDelete);
            if (pAttr != NULL)
            {
                Ok = DoRemove(pAttr);
            }

            pNode = pSelRange->FindNext(pNode);
        }
    }

    if (Ok)
    {
        // Update all parents of this
        ObjChange.Define(OBJCHANGE_FINISHED,cFlags,NULL,this);
        Ok = UpdateChangedNodes(&ObjChange);
    }

    if (!Ok)
    {
        FailAndExecute();
    }

    End(); // End of operation
} 


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

>   NodeAttribute* OpRemoveAttributeFromSelection::FindAttributeOfClassID(Node* const pNode, 
                                                                AttributeIdentifier AttrID)

    Author:     Colin_Barfoot (Xara Group Ltd) <camelotdev@xara.com>
    Created:    08//07/97

    Purpose:    Support function to find an attribute of the given class

    Inputs:     pNode : The attribute to go
                AttrID: The AttributeIdentifier of the attribute to find

    Returns:    An attribute of the given class or NULL if none found

********************************************************************************************/
NodeAttribute* OpRemoveAttributeFromSelection::FindAttributeOfClassID(Node* const pNode, AttributeIdentifier AttrID)
{
    NodeAttribute* pAttr = NodeAttribute::FindFirstAppliedAttr(pNode);

    while (pAttr)
    {
        if (pAttr->GetAttributeClassID() == AttrID)
            return pAttr;

        pAttr = NodeAttribute::FindPrevAppliedAttr(pAttr);
    }

    return NULL;
}



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

>   BOOL OpRemoveAttributeFromSelection::DoRemove(NodeAttribute* const pOldAttr)

    Author:     Colin_Barfoot (Xara Group Ltd) <camelotdev@xara.com>
    Created:    08//07/97

    Purpose:    Support function to remove the attribute

    Inputs:     pOldAttr : The attribute to go
    Returns:    TRUE if successful 
                FALSE if the operation should be aborted (TIDYUP THEN CALL End()!) 

********************************************************************************************/
BOOL OpRemoveAttributeFromSelection::DoRemove(NodeAttribute* const pOldAttr)
{
    ENSURE_NOT_NULL(pOldAttr);      // well use a reference then!

    BOOL Ok = TRUE;

    Node* CurrentNode = pOldAttr->FindParent();
    ERROR3IF(CurrentNode == NULL, "Can't find parent node in Replace Attr");

    // Now we have done with the old attribute, so lets hide it, so
    // the changes can be undone
    Ok = DoHideNode(pOldAttr, 
                    TRUE,       // Include the subtree size (not that there is one)
                    NULL,       // the hidden node
                    TRUE);      // make sure the attribute's HidingNode function is called

    return Ok;
}

---