/*

 * (C) 1999 Lars Knoll (knoll@kde.org)

 * (C) 2000 Dirk Mueller (mueller@kde.org)

 * Copyright (C) 2004, 2005, 2006, 2007 Apple Inc. All rights reserved.

 *

 * This library is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Library General Public

 * License as published by the Free Software Foundation; either

 * version 2 of the License, or (at your option) any later version.

 *

 * This library is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 * Library General Public License for more details.

 *

 * You should have received a copy of the GNU Library General Public License

 * along with this library; see the file COPYING.LIB.  If not, write to

 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,

 * Boston, MA 02110-1301, USA.

 *

 */

#include "config.h"

#include "RenderTextFragment.h"

#include "Text.h"

namespace WebCore {

RenderTextFragment::RenderTextFragment(Node* node, StringImpl* str, int startOffset, int length)

    : RenderText(node, str ? str->substring(startOffset, length) : 0)

    , m_start(startOffset)

    , m_end(length)

    , m_firstLetter(0)

{

}

RenderTextFragment::RenderTextFragment(Node* node, StringImpl* str)

    : RenderText(node, str)

    , m_start(0)

    , m_end(str ? str->length() : 0)

    , m_contentString(str)

    , m_firstLetter(0)

{

}

PassRefPtr<StringImpl> RenderTextFragment::originalText() const

{

    Node* e = element();

    StringImpl* result = (e ? static_cast<Text*>(e)->string() : contentString());

    if (result && (start() > 0 || start() < result->length()))

        result = result->substring(start(), end());

    return result;

}

void RenderTextFragment::destroy()

{

    if (m_firstLetter)

        m_firstLetter->destroy();

    RenderText::destroy();

}

void RenderTextFragment::setTextInternal(PassRefPtr<StringImpl> text)

{

    RenderText::setTextInternal(text);

    if (m_firstLetter) {

        ASSERT(!m_contentString);

        m_firstLetter->destroy();

        m_firstLetter = 0;

        m_start = 0;

        m_end = textLength();

    }

}

UChar RenderTextFragment::previousCharacter()

{

    if (start()) {

        Node* e = element();

        StringImpl*  original = (e ? static_cast<Text*>(e)->string() : contentString());

        if (original)

            return (*original)[start() - 1];

    }

    return RenderText::previousCharacter();

}

} // namespace WebCore