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/*
* 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 "core/layout/LayoutTableCol.h"
#include "core/HTMLNames.h"
#include "core/html/HTMLTableColElement.h"
#include "core/layout/LayoutTable.h"
#include "core/layout/LayoutTableCell.h"
namespace blink {
using namespace HTMLNames;
LayoutTableCol::LayoutTableCol(Element* element)
: LayoutBox(element)
, m_span(1)
{
// init LayoutObject attributes
setInline(true); // our object is not Inline
updateFromElement();
}
void LayoutTableCol::styleDidChange(StyleDifference diff, const ComputedStyle* oldStyle)
{
LayoutBox::styleDidChange(diff, oldStyle);
// If border was changed, notify table.
if (parent()) {
LayoutTable* table = this->table();
if (table && !table->selfNeedsLayout() && !table->normalChildNeedsLayout() && oldStyle && oldStyle->border() != style()->border()) {
table->invalidateCollapsedBorders();
} else if (oldStyle && oldStyle->logicalWidth() != style()->logicalWidth()) {
// FIXME : setPreferredLogicalWidthsDirty is done for all cells as of now.
// Need to find a better way so that only the cells which are changed by
// the col width should have preferred logical widths recomputed.
for (LayoutObject* child = table->children()->firstChild(); child; child = child->nextSibling()) {
if (!child->isTableSection())
continue;
LayoutTableSection* section = toLayoutTableSection(child);
for (LayoutTableRow* row = section->firstRow(); row; row = row->nextRow()) {
for (LayoutTableCell* cell = row->firstCell(); cell; cell = cell->nextCell())
cell->setPreferredLogicalWidthsDirty();
}
}
}
}
}
void LayoutTableCol::updateFromElement()
{
unsigned oldSpan = m_span;
Node* n = node();
if (isHTMLTableColElement(n)) {
HTMLTableColElement& tc = toHTMLTableColElement(*n);
m_span = tc.span();
} else {
m_span = 1;
}
if (m_span != oldSpan && style() && parent())
setNeedsLayoutAndPrefWidthsRecalcAndFullPaintInvalidation(LayoutInvalidationReason::AttributeChanged);
}
void LayoutTableCol::insertedIntoTree()
{
LayoutBox::insertedIntoTree();
table()->addColumn(this);
}
void LayoutTableCol::willBeRemovedFromTree()
{
LayoutBox::willBeRemovedFromTree();
table()->removeColumn(this);
}
bool LayoutTableCol::isChildAllowed(LayoutObject* child, const ComputedStyle& style) const
{
// We cannot use isTableColumn here as style() may return 0.
return child->isLayoutTableCol() && style.display() == TABLE_COLUMN;
}
bool LayoutTableCol::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 LayoutTableCol::localOverflowRectForPaintInvalidation() const
{
// Entire table gets invalidated, instead of invalidating
// every cell in the column.
// This is simpler, but suboptimal.
LayoutTable* table = this->table();
if (!table)
return LayoutRect();
// The correctness of this method depends on the fact that LayoutTableCol's
// location is always zero.
ASSERT(this->location() == LayoutPoint());
return table->localOverflowRectForPaintInvalidation();
}
void LayoutTableCol::imageChanged(WrappedImagePtr, const IntRect*)
{
// FIXME: Issue paint invalidation of only the rect the image paints in.
setShouldDoFullPaintInvalidation();
}
void LayoutTableCol::clearPreferredLogicalWidthsDirtyBits()
{
clearPreferredLogicalWidthsDirty();
for (LayoutObject* child = firstChild(); child; child = child->nextSibling())
child->clearPreferredLogicalWidthsDirty();
}
LayoutTable* LayoutTableCol::table() const
{
LayoutObject* table = parent();
if (table && !table->isTable())
table = table->parent();
return table && table->isTable() ? toLayoutTable(table) : nullptr;
}
LayoutTableCol* LayoutTableCol::enclosingColumnGroup() const
{
if (!parent()->isLayoutTableCol())
return nullptr;
LayoutTableCol* parentColumnGroup = toLayoutTableCol(parent());
ASSERT(parentColumnGroup->isTableColumnGroup());
ASSERT(isTableColumn());
return parentColumnGroup;
}
LayoutTableCol* LayoutTableCol::nextColumn() const
{
// If |this| is a column-group, the next column is the colgroup's first child column.
if (LayoutObject* firstChild = this->firstChild())
return toLayoutTableCol(firstChild);
// Otherwise it's the next column along.
LayoutObject* 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()->isLayoutTableCol())
next = parent()->nextSibling();
for (; next && !next->isLayoutTableCol(); next = next->nextSibling()) { }
return toLayoutTableCol(next);
}
const BorderValue& LayoutTableCol::borderAdjoiningCellStartBorder(const LayoutTableCell*) const
{
return style()->borderStart();
}
const BorderValue& LayoutTableCol::borderAdjoiningCellEndBorder(const LayoutTableCell*) const
{
return style()->borderEnd();
}
const BorderValue& LayoutTableCol::borderAdjoiningCellBefore(const LayoutTableCell* cell) const
{
ASSERT_UNUSED(cell, table()->colElementAtAbsoluteColumn(cell->absoluteColumnIndex() + cell->colSpan()).innermostColOrColGroup() == this);
return style()->borderStart();
}
const BorderValue& LayoutTableCol::borderAdjoiningCellAfter(const LayoutTableCell* cell) const
{
ASSERT_UNUSED(cell, table()->colElementAtAbsoluteColumn(cell->absoluteColumnIndex() - 1).innermostColOrColGroup() == this);
return style()->borderEnd();
}
} // namespace blink
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