/*
 * Copyright 2006-2112, Stephan Aßmus <superstippi@gmx.de>
 * Copyright 2021, Andrew Lindesay <apl@lindesay.co.nz>
 * Distributed under the terms of the MIT License.
 */

#include "CompoundEdit.h"

#include <stdio.h>


CompoundEdit::CompoundEdit(const char* name)
        : UndoableEdit()
        , fEdits()
        , fName(name)
{
}


CompoundEdit::~CompoundEdit()
{
}


status_t
CompoundEdit::InitCheck()
{
        return B_OK;
}


status_t
CompoundEdit::Perform(EditContext& context)
{
        status_t status = B_OK;

        int32 count = static_cast<int32>(fEdits.size());
        int32 i = 0;
        for (; i < count; i++) {
                status = fEdits[i]->Perform(context);
                if (status != B_OK)
                        break;
        }

        if (status != B_OK) {
                // roll back
                i--;
                for (; i >= 0; i--) {
                        fEdits[i]->Undo(context);
                }
        }

        return status;
}


status_t
CompoundEdit::Undo(EditContext& context)
{
        status_t status = B_OK;

        int32 count = static_cast<int32>(fEdits.size());
        int32 i = count - 1;
        for (; i >= 0; i--) {
                status = fEdits[i]->Undo(context);
                if (status != B_OK)
                        break;
        }

        if (status != B_OK) {
                // roll back
                i++;
                for (; i < count; i++) {
                        fEdits[i]->Redo(context);
                }
        }

        return status;
}


status_t
CompoundEdit::Redo(EditContext& context)
{
        status_t status = B_OK;

        int32 count = static_cast<int32>(fEdits.size());
        int32 i = 0;
        for (; i < count; i++) {
                status = fEdits[i]->Redo(context);
                if (status != B_OK)
                        break;
        }

        if (status != B_OK) {
                // roll back
                i--;
                for (; i >= 0; i--) {
                        fEdits[i]->Undo(context);
                }
        }

        return status;
}


void
CompoundEdit::GetName(BString& name)
{
        name << fName;
}


void
CompoundEdit::AppendEdit(const UndoableEditRef& edit)
{
        fEdits.push_back(edit);
}