/*
 * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
 * Copyright (C) 2003, 2004, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All right reserved.
 * Copyright (C) 2010 Google Inc. All rights reserved.
 * Copyright (C) 2013 Adobe Systems Incorporated.
 *
 * 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.
 *
 */

#ifndef LineInfo_h
#define LineInfo_h

#include "core/rendering/line/LineWidth.h"

namespace blink {

class LineInfo {
public:
    LineInfo()
        : m_isFirstLine(true)
        , m_isLastLine(false)
        , m_isEmpty(true)
        , m_previousLineBrokeCleanly(true)
        , m_floatPaginationStrut(0)
        , m_runsFromLeadingWhitespace(0)
    { }

    bool isFirstLine() const { return m_isFirstLine; }
    bool isLastLine() const { return m_isLastLine; }
    bool isEmpty() const { return m_isEmpty; }
    bool previousLineBrokeCleanly() const { return m_previousLineBrokeCleanly; }
    LayoutUnit floatPaginationStrut() const { return m_floatPaginationStrut; }
    unsigned runsFromLeadingWhitespace() const { return m_runsFromLeadingWhitespace; }
    void resetRunsFromLeadingWhitespace() { m_runsFromLeadingWhitespace = 0; }
    void incrementRunsFromLeadingWhitespace() { m_runsFromLeadingWhitespace++; }

    void setFirstLine(bool firstLine) { m_isFirstLine = firstLine; }
    void setLastLine(bool lastLine) { m_isLastLine = lastLine; }
    void setEmpty(bool empty, RenderBlock* block = 0, LineWidth* lineWidth = 0)
    {
        if (m_isEmpty == empty)
            return;
        m_isEmpty = empty;
        if (!empty && block && floatPaginationStrut()) {
            block->setLogicalHeight(block->logicalHeight() + floatPaginationStrut());
            setFloatPaginationStrut(0);
            lineWidth->updateAvailableWidth();
        }
    }

    void setPreviousLineBrokeCleanly(bool previousLineBrokeCleanly) { m_previousLineBrokeCleanly = previousLineBrokeCleanly; }
    void setFloatPaginationStrut(LayoutUnit strut) { m_floatPaginationStrut = strut; }

private:
    bool m_isFirstLine;
    bool m_isLastLine;
    bool m_isEmpty;
    bool m_previousLineBrokeCleanly;
    LayoutUnit m_floatPaginationStrut;
    unsigned m_runsFromLeadingWhitespace;
};

}

#endif // LineInfo_h
