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/*
* Copyright (C) 2008, 2011, 2012, 2013 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.
* 3. Neither the name of Apple Inc. ("Apple") nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "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 OR ITS 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 "HTMLTableRowsCollection.h"
#include "ElementIterator.h"
#include "HTMLNames.h"
#include "HTMLTableElement.h"
#include "HTMLTableRowElement.h"
namespace WebCore {
using namespace HTMLNames;
static inline void assertRowIsInTable(HTMLTableElement& table, HTMLTableRowElement* row)
{
#if !ASSERT_DISABLED
UNUSED_PARAM(table);
UNUSED_PARAM(row);
#else
if (!row)
return;
if (row->parentNode() == &table)
return;
ASSERT(row->parentNode());
ASSERT(row->parentNode()->hasTagName(theadTag) || row->parentNode()->hasTagName(tbodyTag) || row->parentNode()->hasTagName(tfootTag));
ASSERT(row->parentNode()->parentNode() == &table);
#endif
}
static inline bool isInSection(HTMLTableRowElement& row, const HTMLQualifiedName& sectionTag)
{
// Because we know that the parent is a table or a section, it's safe to cast it to an HTMLElement
// giving us access to the faster hasTagName overload from that class.
return downcast<HTMLElement>(*row.parentNode()).hasTagName(sectionTag);
}
HTMLTableRowElement* HTMLTableRowsCollection::rowAfter(HTMLTableElement& table, HTMLTableRowElement* previous)
{
// The HTMLCollection caching mechanism, along with the code in this class, will guarantee that the previous row
// is an immediate child of either the table, or a table section that is itself an immediate child of the table.
assertRowIsInTable(table, previous);
// Start by looking for the next row in this section. Continue only if there is none.
if (previous && previous->parentNode() != &table) {
auto childRows = childrenOfType<HTMLTableRowElement>(*previous->parentNode());
auto row = childRows.beginAt(*previous);
if (++row != childRows.end())
return &*row;
}
Element* child = nullptr;
// If still looking at head sections, find the first row in the next head section.
if (!previous)
child = ElementTraversal::firstChild(table);
else if (isInSection(*previous, theadTag))
child = ElementTraversal::nextSibling(*previous->parentNode());
for (; child; child = ElementTraversal::nextSibling(*child)) {
if (child->hasTagName(theadTag)) {
if (auto row = childrenOfType<HTMLTableRowElement>(*child).first())
return row;
}
}
// If still looking at top level and bodies, find the next row in top level or the first in the next body section.
if (!previous || isInSection(*previous, theadTag))
child = ElementTraversal::firstChild(table);
else if (previous->parentNode() == &table)
child = ElementTraversal::nextSibling(*previous);
else if (isInSection(*previous, tbodyTag))
child = ElementTraversal::nextSibling(*previous->parentNode());
for (; child; child = ElementTraversal::nextSibling(*child)) {
if (is<HTMLTableRowElement>(*child))
return downcast<HTMLTableRowElement>(child);
if (child->hasTagName(tbodyTag)) {
if (auto row = childrenOfType<HTMLTableRowElement>(*child).first())
return row;
}
}
// Find the first row in the next foot section.
if (!previous || !isInSection(*previous, tfootTag))
child = ElementTraversal::firstChild(table);
else
child = ElementTraversal::nextSibling(*previous->parentNode());
for (; child; child = ElementTraversal::nextSibling(*child)) {
if (child->hasTagName(tfootTag)) {
if (auto row = childrenOfType<HTMLTableRowElement>(*child).first())
return row;
}
}
return nullptr;
}
HTMLTableRowElement* HTMLTableRowsCollection::lastRow(HTMLTableElement& table)
{
for (auto* child = ElementTraversal::lastChild(table); child; child = ElementTraversal::previousSibling(*child)) {
if (child->hasTagName(tfootTag)) {
if (auto* row = childrenOfType<HTMLTableRowElement>(*child).last())
return row;
}
}
for (auto* child = ElementTraversal::lastChild(table); child; child = ElementTraversal::previousSibling(*child)) {
if (is<HTMLTableRowElement>(*child))
return downcast<HTMLTableRowElement>(child);
if (child->hasTagName(tbodyTag)) {
if (auto* row = childrenOfType<HTMLTableRowElement>(*child).last())
return row;
}
}
for (auto* child = ElementTraversal::lastChild(table); child; child = ElementTraversal::previousSibling(*child)) {
if (child->hasTagName(theadTag)) {
if (auto* row = childrenOfType<HTMLTableRowElement>(*child).last())
return row;
}
}
return nullptr;
}
HTMLTableRowsCollection::HTMLTableRowsCollection(HTMLTableElement& table)
: CachedHTMLCollection<HTMLTableRowsCollection, CollectionTypeTraits<TableRows>::traversalType>(table, TableRows)
{
}
Ref<HTMLTableRowsCollection> HTMLTableRowsCollection::create(HTMLTableElement& table, CollectionType type)
{
ASSERT_UNUSED(type, type == TableRows);
return adoptRef(*new HTMLTableRowsCollection(table));
}
Element* HTMLTableRowsCollection::customElementAfter(Element* previous) const
{
return rowAfter(const_cast<HTMLTableElement&>(tableElement()), downcast<HTMLTableRowElement>(previous));
}
}
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