/*
 * Copyright 2006, Haiku.
 * Distributed under the terms of the MIT License.
 *
 * Authors:
 *              Stephan Aßmus <superstippi@gmx.de>
 */

#include "ChangePointCommand.h"

#include <new>
#include <stdio.h>

#include <Catalog.h>
#include <Locale.h>

#include "VectorPath.h"


#undef B_TRANSLATION_CONTEXT
#define B_TRANSLATION_CONTEXT "Icon-O-Matic-ChangePointCmd"


using std::nothrow;

// constructor
ChangePointCommand::ChangePointCommand(VectorPath* path,
                                                                          int32 index,
                                                                          const int32* selected,
                                                                          int32 count)
        : PathCommand(path),
          fIndex(index),
          fOldSelection(NULL),
          fOldSelectionCount(count)
{
        if (fPath && !fPath->GetPointsAt(fIndex, fPoint, fPointIn, fPointOut, &fConnected))
                fPath = NULL;
        if (fOldSelectionCount > 0 && selected) {
                fOldSelection = new (nothrow) int32[fOldSelectionCount];
                memcpy(fOldSelection, selected, fOldSelectionCount * sizeof(int32));
        }
}

// destructor
ChangePointCommand::~ChangePointCommand()
{
        delete[] fOldSelection;
}

// InitCheck
status_t
ChangePointCommand::InitCheck()
{
        // TODO: figure out if selection changed!!!
        // (this command is also used to undo changes to the selection)
        // (but tracking the selection does not yet work in Icon-O-Matic)
        
        status_t ret = PathCommand::InitCheck();
        if (ret < B_OK)
                return ret;

        BPoint point;
        BPoint pointIn;
        BPoint pointOut;
        bool connected;
        if (!fPath->GetPointsAt(fIndex, point, pointIn, pointOut, &connected))
                return B_ERROR;

        if (point != fPoint || pointIn != fPointIn
                || pointOut != fPointOut || connected != fConnected)
                return B_OK;

        return B_ERROR;
}

// Perform
status_t
ChangePointCommand::Perform()
{
        // path point is already changed
        return B_OK;
}

// Undo
status_t
ChangePointCommand::Undo()
{
        status_t status = InitCheck();
        if (status < B_OK)
                return status;

        // set the point to the remembered state and
        // save the previous state of the point
        BPoint point;
        BPoint pointIn;
        BPoint pointOut;
        bool connected;
        if (fPath->GetPointsAt(fIndex, point, pointIn, pointOut, &connected)
                && fPath->SetPoint(fIndex, fPoint, fPointIn, fPointOut, fConnected)) {
                // toggle the remembered settings
                fPoint = point;
                fPointIn = pointIn;
                fPointOut = pointOut;
                fConnected = connected;
                // restore old selection
                _Select(fOldSelection, fOldSelectionCount);
        } else {
                status = B_ERROR;
        }

        return status;
}

// Redo
status_t
ChangePointCommand::Redo()
{
        status_t status = Undo();
        if (status >= B_OK)
                _Select(&fIndex, 1);
        return status;
}

// GetName
void
ChangePointCommand::GetName(BString& name)
{
        name << B_TRANSLATE("Modify vertex");
}