root/Source/core/rendering/RenderTableCol.cpp

DEFINITIONS

1. m_span
2. styleDidChange
3. updateFromElement
4. insertedIntoTree
5. willBeRemovedFromTree
6. isChildAllowed
7. canHaveChildren
8. clippedOverflowRectForRepaint
9. imageChanged
10. clearPreferredLogicalWidthsDirtyBits
11. table
12. enclosingColumnGroup
13. nextColumn
14. borderAdjoiningCellStartBorder
15. borderAdjoiningCellEndBorder
16. borderAdjoiningCellBefore
17. borderAdjoiningCellAfter

/*
 * 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, 2009 Apple Inc. All rights reserved.
 * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
 *
 * 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 "core/rendering/RenderTableCol.h"

#include "HTMLNames.h"
#include "core/html/HTMLTableColElement.h"
#include "core/rendering/RenderTable.h"
#include "core/rendering/RenderTableCell.h"

namespace WebCore {

using namespace HTMLNames;

RenderTableCol::RenderTableCol(Element* element)
    : RenderBox(element)
    , m_span(1)
{
    // init RenderObject attributes
    setInline(true); // our object is not Inline
    updateFromElement();
}

void RenderTableCol::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle)
{
    RenderBox::styleDidChange(diff, oldStyle);

    // If border was changed, notify table.
    if (parent()) {
        RenderTable* table = this->table();
        if (table && !table->selfNeedsLayout() && !table->normalChildNeedsLayout() && oldStyle && oldStyle->border() != style()->border())
            table->invalidateCollapsedBorders();
    }
}

void RenderTableCol::updateFromElement()
{
    unsigned oldSpan = m_span;
    Node* n = node();
    if (isHTMLTableColElement(n)) {
        HTMLTableColElement& tc = toHTMLTableColElement(*n);
        m_span = tc.span();
    } else
        m_span = !(style() && style()->display() == TABLE_COLUMN_GROUP);
    if (m_span != oldSpan && style() && parent())
        setNeedsLayoutAndPrefWidthsRecalc();
}

void RenderTableCol::insertedIntoTree()
{
    RenderBox::insertedIntoTree();
    table()->addColumn(this);
}

void RenderTableCol::willBeRemovedFromTree()
{
    RenderBox::willBeRemovedFromTree();
    table()->removeColumn(this);
}

bool RenderTableCol::isChildAllowed(RenderObject* child, RenderStyle* style) const
{
    // We cannot use isTableColumn here as style() may return 0.
    return child->isRenderTableCol() && style->display() == TABLE_COLUMN;
}

bool RenderTableCol::canHaveChildren() const
{
    // Cols cannot have children. This is actually necessary to fix a bug
    // with libraries.uc.edu, which makes a <p> be a table-column.
    return isTableColumnGroup();
}

LayoutRect RenderTableCol::clippedOverflowRectForRepaint(const RenderLayerModelObject* repaintContainer) const
{
    // 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 or borders into.
    // FIXME: check for repaintContainer each time here?

    RenderTable* parentTable = table();
    if (!parentTable)
        return LayoutRect();
    return parentTable->clippedOverflowRectForRepaint(repaintContainer);
}

void RenderTableCol::imageChanged(WrappedImagePtr, const IntRect*)
{
    // FIXME: Repaint only the rect the image paints in.
    repaint();
}

void RenderTableCol::clearPreferredLogicalWidthsDirtyBits()
{
    clearPreferredLogicalWidthsDirty();

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

RenderTable* RenderTableCol::table() const
{
    RenderObject* table = parent();
    if (table && !table->isTable())
        table = table->parent();
    return table && table->isTable() ? toRenderTable(table) : 0;
}

RenderTableCol* RenderTableCol::enclosingColumnGroup() const
{
    if (!parent()->isRenderTableCol())
        return 0;

    RenderTableCol* parentColumnGroup = toRenderTableCol(parent());
    ASSERT(parentColumnGroup->isTableColumnGroup());
    ASSERT(isTableColumn());
    return parentColumnGroup;
}

RenderTableCol* RenderTableCol::nextColumn() const
{
    // If |this| is a column-group, the next column is the colgroup's first child column.
    if (RenderObject* firstChild = this->firstChild())
        return toRenderTableCol(firstChild);

    // Otherwise it's the next column along.
    RenderObject* next = nextSibling();

    // Failing that, the child is the last column in a column-group, so the next column is the next column/column-group after its column-group.
    if (!next && parent()->isRenderTableCol())
        next = parent()->nextSibling();

    for (; next && !next->isRenderTableCol(); next = next->nextSibling()) { }

    return toRenderTableCol(next);
}

const BorderValue& RenderTableCol::borderAdjoiningCellStartBorder(const RenderTableCell*) const
{
    return style()->borderStart();
}

const BorderValue& RenderTableCol::borderAdjoiningCellEndBorder(const RenderTableCell*) const
{
    return style()->borderEnd();
}

const BorderValue& RenderTableCol::borderAdjoiningCellBefore(const RenderTableCell* cell) const
{
    ASSERT_UNUSED(cell, table()->colElement(cell->col() + cell->colSpan()) == this);
    return style()->borderStart();
}

const BorderValue& RenderTableCol::borderAdjoiningCellAfter(const RenderTableCell* cell) const
{
    ASSERT_UNUSED(cell, table()->colElement(cell->col() - 1) == this);
    return style()->borderEnd();
}

}