/*

 * Copyright (C) 2004, 2006, 2007 Apple 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 "RenderHTMLCanvas.h"

#include "Document.h"

#include "GraphicsContext.h"

#include "HTMLCanvasElement.h"

#include "HTMLNames.h"

#include "RenderView.h"

namespace WebCore {

using namespace HTMLNames;

RenderHTMLCanvas::RenderHTMLCanvas(HTMLCanvasElement* element)

    : RenderReplaced(element, element->size())

{

}

void RenderHTMLCanvas::paint(PaintInfo& paintInfo, int tx, int ty)

{

    if (!shouldPaint(paintInfo, tx, ty))

        return;

    int x = tx + m_x;

    int y = ty + m_y;

    if (hasBoxDecorations() && (paintInfo.phase == PaintPhaseForeground || paintInfo.phase == PaintPhaseSelection)) 

        paintBoxDecorations(paintInfo, x, y);

    if ((paintInfo.phase == PaintPhaseOutline || paintInfo.phase == PaintPhaseSelfOutline) && style()->outlineWidth() && style()->visibility() == VISIBLE)

        paintOutline(paintInfo.context, x, y, width(), height(), style());

    if (paintInfo.phase != PaintPhaseForeground && paintInfo.phase != PaintPhaseSelection)

        return;

    if (!shouldPaintWithinRoot(paintInfo))

        return;

    bool drawSelectionTint = selectionState() != SelectionNone && !document()->printing();

    if (paintInfo.phase == PaintPhaseSelection) {

        if (selectionState() == SelectionNone)

            return;

        drawSelectionTint = false;

    }

    static_cast<HTMLCanvasElement*>(node())->paint(paintInfo.context,

        IntRect(x + borderLeft() + paddingLeft(), y + borderTop() + paddingTop(), contentWidth(), contentHeight()));

    if (drawSelectionTint)

        paintInfo.context->fillRect(selectionRect(), selectionBackgroundColor());

}

void RenderHTMLCanvas::layout()

{

    ASSERT(needsLayout());

    IntRect oldBounds;

    IntRect oldOutlineBox;

    bool checkForRepaint = checkForRepaintDuringLayout();

    if (checkForRepaint) {

        oldBounds = absoluteClippedOverflowRect();

        oldOutlineBox = absoluteOutlineBox();

    }

    calcWidth();

    calcHeight();

    adjustOverflowForBoxShadow();

    if (checkForRepaint)

        repaintAfterLayoutIfNeeded(oldBounds, oldOutlineBox);

    setNeedsLayout(false);

}

void RenderHTMLCanvas::canvasSizeChanged()

{

    IntSize size = static_cast<HTMLCanvasElement*>(node())->size();

    if (size == intrinsicSize())

        return;

    setIntrinsicSize(size);

    if (!prefWidthsDirty())

        setPrefWidthsDirty(true);

    IntSize oldSize = IntSize(m_width, m_height);

    calcWidth();

    calcHeight();

    if (oldSize == IntSize(m_width, m_height))

        return;

    if (!selfNeedsLayout())

        setNeedsLayout(true);

}

} // namespace WebCore