/*

 * This file is part of the HTML widget for KDE.

 *

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

 * Copyright (C) 2006 Apple Computer, Inc.

 *

 * 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 RenderView_h

#define RenderView_h

#include "FrameView.h"

#include "LayoutState.h"

#include "RenderBlock.h"

namespace WebCore {

class RenderView : public RenderBlock {

public:

    RenderView(Node*, FrameView*);

    virtual ~RenderView();

    virtual const char* renderName() const { return "RenderView"; }

    virtual bool isRenderView() const { return true; }

    virtual void layout();

    virtual void calcWidth();

    virtual void calcHeight();

    virtual void calcPrefWidths();

    virtual bool absolutePosition(int& xPos, int& yPos, bool fixed = false) const;

    int docHeight() const;

    int docWidth() const;

    FrameView* frameView() const { return m_frameView; }

    virtual bool hasOverhangingFloats() { return false; }

    virtual void computeAbsoluteRepaintRect(IntRect&, bool fixed = false);

    virtual void repaintViewRectangle(const IntRect&, bool immediate = false);

    virtual void paint(PaintInfo&, int tx, int ty);

    virtual void paintBoxDecorations(PaintInfo&, int tx, int ty);

    void setSelection(RenderObject* start, int startPos, RenderObject* end, int endPos);

    void clearSelection();

    virtual RenderObject* selectionStart() const { return m_selectionStart; }

    virtual RenderObject* selectionEnd() const { return m_selectionEnd; }

    bool printing() const;

    void setPrintImages(bool enable) { m_printImages = enable; }

    bool printImages() const { return m_printImages; }

    void setTruncatedAt(int y) { m_truncatedAt = y; m_bestTruncatedAt = m_truncatorWidth = 0; m_forcedPageBreak = false; }

    void setBestTruncatedAt(int y, RenderObject *forRenderer, bool forcedBreak = false);

    int bestTruncatedAt() const { return m_bestTruncatedAt; }

    int truncatedAt() const { return m_truncatedAt; }

    virtual void absoluteRects(Vector<IntRect>&, int tx, int ty, bool topLevel = true);

    IntRect selectionRect(bool clipToVisibleContent = true) const;

    void setMaximalOutlineSize(int o) { m_maximalOutlineSize = o; }

    int maximalOutlineSize() const { return m_maximalOutlineSize; }

    virtual IntRect viewRect() const;

    virtual void selectionStartEnd(int& startPos, int& endPos) const;

    IntRect printRect() const { return m_printRect; }

    void setPrintRect(const IntRect& r) { m_printRect = r; }

    void updateWidgetPositions();

    void addWidget(RenderObject*);

    void removeWidget(RenderObject*);

    const IntSize& layoutDelta() const { return m_layoutDelta; }

    void addLayoutDelta(const IntSize& delta) { m_layoutDelta += delta; }

    void pushLayoutState(RenderBox* renderer, const IntSize& offset)

    {

        if (m_layoutStateDisableCount || m_frameView->needsFullRepaint())

            return;

        m_layoutState = new (renderArena()) LayoutState(m_layoutState, renderer, offset);

    }

    void pushLayoutState(RenderObject*);

    void popLayoutState()

    {

        if (m_layoutStateDisableCount || m_frameView->needsFullRepaint())

            return;

        LayoutState* state = m_layoutState;

        m_layoutState = state->m_next;

        state->destroy(renderArena());

    }

    LayoutState* layoutState() const { return m_layoutStateDisableCount ? 0 : m_layoutState; }

    // Suspends the LayoutState optimization. Used under transforms that cannot be represented by

    // LayoutState (common in SVG) and when manipulating the render tree during layout in ways

    // that can trigger repaint of a non-child (e.g. when a list item moves its list marker around).

    void disableLayoutState() { m_layoutStateDisableCount++; }

    void enableLayoutState() { ASSERT(m_layoutStateDisableCount > 0); m_layoutStateDisableCount--; }

protected:

    FrameView* m_frameView;

    RenderObject* m_selectionStart;

    RenderObject* m_selectionEnd;

    int m_selectionStartPos;

    int m_selectionEndPos;

    // used to ignore viewport width when printing to the printer

    bool m_printImages;

    int m_truncatedAt;

    int m_maximalOutlineSize; // Used to apply a fudge factor to dirty-rect checks on blocks/tables.

    IntRect m_printRect; // Used when printing.

    typedef HashSet<RenderObject*> RenderObjectSet;

    RenderObjectSet m_widgets;

private:

    int m_bestTruncatedAt;

    int m_truncatorWidth;

    bool m_forcedPageBreak;

    IntSize m_layoutDelta;

    LayoutState* m_layoutState;

    unsigned m_layoutStateDisableCount;

};

} // namespace WebCore

#endif // RenderView_h