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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)
: LayoutTableBoxComponent(element), m_span(1) {
// init LayoutObject attributes
setInline(true); // our object is not Inline
updateFromElement();
}
void LayoutTableCol::styleDidChange(StyleDifference diff,
const ComputedStyle* oldStyle) {
DCHECK(style()->display() == EDisplay::TableColumn ||
style()->display() == EDisplay::TableColumnGroup);
LayoutTableBoxComponent::styleDidChange(diff, oldStyle);
if (!oldStyle)
return;
LayoutTable* table = this->table();
if (!table)
return;
// TODO(dgrogan): Is the "else" necessary for correctness or just a brittle
// optimization? The optimization would be: if the first branch is taken then
// the next one can't be, so don't even check its condition.
if (!table->selfNeedsLayout() && !table->normalChildNeedsLayout() &&
oldStyle->border() != style()->border()) {
table->invalidateCollapsedBorders();
} else if ((oldStyle->logicalWidth() != style()->logicalWidth()) ||
LayoutTableBoxComponent::doCellsHaveDirtyWidth(*this, *table, diff,
*oldStyle)) {
// TODO(dgrogan): Optimization opportunities:
// (1) Only mark cells which are affected by this col, not every cell in the
// table.
// (2) If only the col width changes and its border width doesn't, do the
// cells need to be marked as needing layout or just given dirty
// widths?
table->markAllCellsWidthsDirtyAndOrNeedsLayout(
LayoutTable::MarkDirtyAndNeedsLayout);
}
}
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() {
LayoutTableBoxComponent::insertedIntoTree();
table()->addColumn(this);
}
void LayoutTableCol::willBeRemovedFromTree() {
LayoutTableBoxComponent::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() == EDisplay::TableColumn;
}
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::localVisualRect() 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->localVisualRect();
}
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 {
DCHECK_EQ(table()
->colElementAtAbsoluteColumn(cell->absoluteColumnIndex() +
cell->colSpan())
.innermostColOrColGroup(),
this);
return style()->borderStart();
}
const BorderValue& LayoutTableCol::borderAdjoiningCellAfter(
const LayoutTableCell* cell) const {
DCHECK_EQ(table()
->colElementAtAbsoluteColumn(cell->absoluteColumnIndex() - 1)
.innermostColOrColGroup(),
this);
return style()->borderEnd();
}
} // namespace blink
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