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/*
* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
* (C) 1999 Antti Koivisto (koivisto@kde.org)
* Copyright (C) 2003, 2004, 2005, 2006, 2007 Apple Inc. All rights reserved.
*
* 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 "HTMLFormCollection.h"
#include "CollectionCache.h"
#include "HTMLFormControlElement.h"
#include "HTMLFormElement.h"
#include "HTMLImageElement.h"
#include "HTMLNames.h"
namespace WebCore {
using namespace HTMLNames;
// Since the collections are to be "live", we have to do the
// calculation every time if anything has changed.
inline CollectionCache* HTMLFormCollection::formCollectionInfo(HTMLFormElement* form)
{
if (!form->collectionInfo)
form->collectionInfo = new CollectionCache;
return form->collectionInfo;
}
HTMLFormCollection::HTMLFormCollection(PassRefPtr<HTMLFormElement> form)
: HTMLCollection(form.get(), OtherCollection, formCollectionInfo(form.get()))
{
}
PassRefPtr<HTMLFormCollection> HTMLFormCollection::create(PassRefPtr<HTMLFormElement> form)
{
return adoptRef(new HTMLFormCollection(form));
}
HTMLFormCollection::~HTMLFormCollection()
{
}
unsigned HTMLFormCollection::calcLength() const
{
return static_cast<HTMLFormElement*>(base())->length();
}
Node* HTMLFormCollection::item(unsigned index) const
{
resetCollectionInfo();
if (info()->current && info()->position == index)
return info()->current;
if (info()->hasLength && info()->length <= index)
return 0;
if (!info()->current || info()->position > index) {
info()->current = 0;
info()->position = 0;
info()->elementsArrayPosition = 0;
}
Vector<HTMLFormControlElement*>& l = static_cast<HTMLFormElement*>(base())->formElements;
unsigned currentIndex = info()->position;
for (unsigned i = info()->elementsArrayPosition; i < l.size(); i++) {
if (l[i]->isEnumeratable() ) {
if (index == currentIndex) {
info()->position = index;
info()->current = l[i];
info()->elementsArrayPosition = i;
return l[i];
}
currentIndex++;
}
}
return 0;
}
Element* HTMLFormCollection::getNamedItem(const QualifiedName& attrName, const AtomicString& name) const
{
info()->position = 0;
return getNamedFormItem(attrName, name, 0);
}
Element* HTMLFormCollection::getNamedFormItem(const QualifiedName& attrName, const String& name, int duplicateNumber) const
{
HTMLFormElement* form = static_cast<HTMLFormElement*>(base());
bool foundInputElements = false;
for (unsigned i = 0; i < form->formElements.size(); ++i) {
HTMLFormControlElement* e = form->formElements[i];
if (e->isEnumeratable() && e->getAttribute(attrName) == name) {
foundInputElements = true;
if (!duplicateNumber)
return e;
--duplicateNumber;
}
}
if (!foundInputElements) {
for (unsigned i = 0; i < form->imgElements.size(); ++i) {
HTMLImageElement* e = form->imgElements[i];
if (e->getAttribute(attrName) == name) {
if (!duplicateNumber)
return e;
--duplicateNumber;
}
}
}
return 0;
}
Node* HTMLFormCollection::nextItem() const
{
return item(info()->position + 1);
}
Element* HTMLFormCollection::nextNamedItemInternal(const String &name) const
{
Element* retval = getNamedFormItem(m_idsDone ? nameAttr : idAttr, name, ++info()->position);
if (retval)
return retval;
if (m_idsDone) // we're done
return 0;
// After doing id, do name
m_idsDone = true;
return getNamedItem(nameAttr, name);
}
Node* HTMLFormCollection::namedItem(const AtomicString& name) const
{
// http://msdn.microsoft.com/workshop/author/dhtml/reference/methods/nameditem.asp
// This method first searches for an object with a matching id
// attribute. If a match is not found, the method then searches for an
// object with a matching name attribute, but only on those elements
// that are allowed a name attribute.
resetCollectionInfo();
m_idsDone = false;
info()->current = getNamedItem(idAttr, name);
if (info()->current)
return info()->current;
m_idsDone = true;
info()->current = getNamedItem(nameAttr, name);
return info()->current;
}
Node* HTMLFormCollection::nextNamedItem(const AtomicString& name) const
{
// The nextNamedItemInternal function can return the same item twice if it has
// both an id and name that are equal to the name parameter. So this function
// checks if we are on the nameAttr half of the iteration and skips over any
// that also have the same idAttr.
Element* impl = nextNamedItemInternal(name);
if (m_idsDone)
while (impl && impl->getAttribute(idAttr) == name)
impl = nextNamedItemInternal(name);
return impl;
}
void HTMLFormCollection::updateNameCache() const
{
if (info()->hasNameCache)
return;
HashSet<AtomicStringImpl*> foundInputElements;
HTMLFormElement* f = static_cast<HTMLFormElement*>(base());
for (unsigned i = 0; i < f->formElements.size(); ++i) {
HTMLFormControlElement* e = f->formElements[i];
if (e->isEnumeratable()) {
const AtomicString& idAttrVal = e->getAttribute(idAttr);
const AtomicString& nameAttrVal = e->getAttribute(nameAttr);
if (!idAttrVal.isEmpty()) {
// add to id cache
Vector<Element*>* idVector = info()->idCache.get(idAttrVal.impl());
if (!idVector) {
idVector = new Vector<Element*>;
info()->idCache.add(idAttrVal.impl(), idVector);
}
idVector->append(e);
foundInputElements.add(idAttrVal.impl());
}
if (!nameAttrVal.isEmpty() && idAttrVal != nameAttrVal) {
// add to name cache
Vector<Element*>* nameVector = info()->nameCache.get(nameAttrVal.impl());
if (!nameVector) {
nameVector = new Vector<Element*>;
info()->nameCache.add(nameAttrVal.impl(), nameVector);
}
nameVector->append(e);
foundInputElements.add(nameAttrVal.impl());
}
}
}
for (unsigned i = 0; i < f->imgElements.size(); ++i) {
HTMLImageElement* e = f->imgElements[i];
const AtomicString& idAttrVal = e->getAttribute(idAttr);
const AtomicString& nameAttrVal = e->getAttribute(nameAttr);
if (!idAttrVal.isEmpty() && !foundInputElements.contains(idAttrVal.impl())) {
// add to id cache
Vector<Element*>* idVector = info()->idCache.get(idAttrVal.impl());
if (!idVector) {
idVector = new Vector<Element*>;
info()->idCache.add(idAttrVal.impl(), idVector);
}
idVector->append(e);
}
if (!nameAttrVal.isEmpty() && idAttrVal != nameAttrVal && !foundInputElements.contains(nameAttrVal.impl())) {
// add to name cache
Vector<Element*>* nameVector = info()->nameCache.get(nameAttrVal.impl());
if (!nameVector) {
nameVector = new Vector<Element*>;
info()->nameCache.add(nameAttrVal.impl(), nameVector);
}
nameVector->append(e);
}
}
info()->hasNameCache = true;
}
}
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