/**

 * Copyright (C) 1997 Martin Jones (mjones@kde.org)

 *           (C) 1997 Torben Weis (weis@kde.org)

 *           (C) 1998 Waldo Bastian (bastian@kde.org)

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

 *           (C) 1999 Antti Koivisto (koivisto@kde.org)

 * Copyright (C) 2003, 2004, 2005, 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.

 */

#include "config.h"

#include "RenderTableRow.h"

#include "CachedImage.h"

#include "Document.h"

#include "HTMLNames.h"

#include "RenderTableCell.h"

#include "RenderView.h"

namespace WebCore {

using namespace HTMLNames;

RenderTableRow::RenderTableRow(Node* node)

    : RenderBox(node)

{

    // init RenderObject attributes

    setInline(false);   // our object is not Inline

}

void RenderTableRow::destroy()

{

    RenderTableSection* recalcSection = section();

    RenderBox::destroy();

    if (recalcSection)

        recalcSection->setNeedsCellRecalc();

}

void RenderTableRow::styleWillChange(StyleDifference diff, const RenderStyle* newStyle)

{

    if (section() && style() && style()->height() != newStyle->height())

        section()->setNeedsCellRecalc();

    ASSERT(newStyle->display() == TABLE_ROW);

    RenderBox::styleWillChange(diff, newStyle);

}

void RenderTableRow::addChild(RenderObject* child, RenderObject* beforeChild)

{

    // Make sure we don't append things after :after-generated content if we have it.

    if (!beforeChild && isAfterContent(lastChild()))

        beforeChild = lastChild();

    if (!child->isTableCell()) {

        RenderObject* last = beforeChild;

        if (!last)

            last = lastChild();

        if (last && last->isAnonymous() && last->isTableCell()) {

            last->addChild(child);

            return;

        }

        // If beforeChild is inside an anonymous cell, insert into the cell.

        if (last && !last->isTableCell() && last->parent() && last->parent()->isAnonymous()) {

            last->parent()->addChild(child, beforeChild);

            return;

        }

        RenderTableCell* cell = new (renderArena()) RenderTableCell(document() /* anonymous object */);

        RefPtr<RenderStyle> newStyle = RenderStyle::create();

        newStyle->inheritFrom(style());

        newStyle->setDisplay(TABLE_CELL);

        cell->setStyle(newStyle.release());

        addChild(cell, beforeChild);

        cell->addChild(child);

        return;

    } 

    // If the next renderer is actually wrapped in an anonymous table cell, we need to go up and find that.

    while (beforeChild && beforeChild->parent() != this)

        beforeChild = beforeChild->parent();

    RenderTableCell* cell = toRenderTableCell(child);

    // Generated content can result in us having a null section so make sure to null check our parent.

    if (parent())

        section()->addCell(cell, this);

    ASSERT(!beforeChild || beforeChild->isTableCell());

    RenderBox::addChild(cell, beforeChild);

    if (beforeChild || nextSibling())

        section()->setNeedsCellRecalc();

}

void RenderTableRow::layout()

{

    ASSERT(needsLayout());

    // Table rows do not add translation.

    LayoutStateMaintainer statePusher(view(), this, IntSize());

    for (RenderObject* child = firstChild(); child; child = child->nextSibling()) {

        if (child->isTableCell()) {

            RenderTableCell* cell = toRenderTableCell(child);

            if (child->needsLayout()) {

                cell->calcVerticalMargins();

                cell->layout();

            }

        }

    }

    // We only ever need to repaint if our cells didn't, which menas that they didn't need

    // layout, so we know that our bounds didn't change. This code is just making up for

    // the fact that we did not repaint in setStyle() because we had a layout hint.

    // We cannot call repaint() because our clippedOverflowRectForRepaint() is taken from the

    // parent table, and being mid-layout, that is invalid. Instead, we repaint our cells.

    if (selfNeedsLayout() && checkForRepaintDuringLayout()) {

        for (RenderObject* child = firstChild(); child; child = child->nextSibling()) {

            if (child->isTableCell())

                child->repaint();

        }

    }

    statePusher.pop();

    setNeedsLayout(false);

}

IntRect RenderTableRow::clippedOverflowRectForRepaint(RenderBoxModelObject* repaintContainer)

{

    ASSERT(parent());

    if (repaintContainer == this)

        return RenderBox::clippedOverflowRectForRepaint(repaintContainer);

    // For now, just repaint the whole table.

    // FIXME: Find a better way to do this, e.g., need to repaint all the cells that we

    // might have propagated a background color into.

    // FIXME: do repaintContainer checks here

    if (RenderTable* parentTable = table())

        return parentTable->clippedOverflowRectForRepaint(repaintContainer);

    return IntRect();

}

// Hit Testing

bool RenderTableRow::nodeAtPoint(const HitTestRequest& request, HitTestResult& result, int x, int y, int tx, int ty, HitTestAction action)

{

    // Table rows cannot ever be hit tested.  Effectively they do not exist.

    // Just forward to our children always.

    for (RenderObject* child = lastChild(); child; child = child->previousSibling()) {

        // FIXME: We have to skip over inline flows, since they can show up inside table rows

        // at the moment (a demoted inline <form> for example). If we ever implement a

        // table-specific hit-test method (which we should do for performance reasons anyway),

        // then we can remove this check.

        if (child->isTableCell() && !toRenderBox(child)->hasSelfPaintingLayer() && child->nodeAtPoint(request, result, x, y, tx, ty, action)) {

            updateHitTestResult(result, IntPoint(x - tx, y - ty));

            return true;

        }

    }

    return false;

}

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

{

    ASSERT(hasSelfPaintingLayer());

    if (!layer())

        return;

    for (RenderObject* child = firstChild(); child; child = child->nextSibling()) {

        if (child->isTableCell()) {

            // Paint the row background behind the cell.

            if (paintInfo.phase == PaintPhaseBlockBackground || paintInfo.phase == PaintPhaseChildBlockBackground) {

                RenderTableCell* cell = toRenderTableCell(child);

                cell->paintBackgroundsBehindCell(paintInfo, tx, ty, this);

            }

            if (!toRenderBox(child)->hasSelfPaintingLayer())

                child->paint(paintInfo, tx, ty);

        }

    }

}

void RenderTableRow::imageChanged(WrappedImagePtr, const IntRect*)

{

    // FIXME: Examine cells and repaint only the rect the image paints in.

    repaint();

}

} // namespace WebCore