/*

 * Copyright (C) 2005, 2006 Apple Computer, Inc.  All rights reserved.

 *

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

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. 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.

 *

 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``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 APPLE COMPUTER, INC. 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. 

 */

#include "config.h"

#include "MoveSelectionCommand.h"

#include "DocumentFragment.h"

#include "ReplaceSelectionCommand.h"

namespace WebCore {

MoveSelectionCommand::MoveSelectionCommand(PassRefPtr<DocumentFragment> fragment, const Position& position, bool smartInsert, bool smartDelete) 

    : CompositeEditCommand(position.node()->document()), m_fragment(fragment), m_position(position), m_smartInsert(smartInsert), m_smartDelete(smartDelete)

{

    ASSERT(m_fragment);

}

void MoveSelectionCommand::doApply()

{

    VisibleSelection selection = endingSelection();

    ASSERT(selection.isRange());

    Position pos = m_position;

    if (pos.isNull())

        return;

    // Update the position otherwise it may become invalid after the selection is deleted.

    Node *positionNode = m_position.node();

    int positionOffset = m_position.deprecatedEditingOffset();

    Position selectionEnd = selection.end();

    int selectionEndOffset = selectionEnd.deprecatedEditingOffset();

    if (selectionEnd.node() == positionNode && selectionEndOffset < positionOffset) {

        positionOffset -= selectionEndOffset;

        Position selectionStart = selection.start();

        if (selectionStart.node() == positionNode) {

            positionOffset += selectionStart.deprecatedEditingOffset();

        }

        pos = Position(positionNode, positionOffset);

    }

    deleteSelection(m_smartDelete);

    // If the node for the destination has been removed as a result of the deletion,

    // set the destination to the ending point after the deletion.

    // Fixes: <rdar://problem/3910425> REGRESSION (Mail): Crash in ReplaceSelectionCommand; 

    //        selection is empty, leading to null deref

    if (!pos.node()->inDocument())

        pos = endingSelection().start();

    setEndingSelection(VisibleSelection(pos, endingSelection().affinity()));

    if (!positionNode->inDocument()) {

        // Document was modified out from under us.

        return;

    }

    applyCommandToComposite(ReplaceSelectionCommand::create(positionNode->document(), m_fragment, true, m_smartInsert));

}

EditAction MoveSelectionCommand::editingAction() const

{

    return EditActionDrag;

}

} // namespace WebCore