HTMLCollection.cpp [plain text]
#include "config.h"
#include "HTMLCollection.h"
#include "HTMLDocument.h"
#include "HTMLElement.h"
#include "HTMLNames.h"
#include "HTMLObjectElement.h"
#include "HTMLOptionElement.h"
#include "NodeList.h"
#include <utility>
namespace WebCore {
using namespace HTMLNames;
HTMLCollection::HTMLCollection(PassRefPtr<Node> base, CollectionType type)
: m_idsDone(false)
, m_base(base)
, m_type(type)
, m_info(m_base->isDocumentNode() ? static_cast<Document*>(m_base.get())->collectionInfo(type) : 0)
, m_ownsInfo(false)
{
}
HTMLCollection::HTMLCollection(PassRefPtr<Node> base, CollectionType type, CollectionCache* info)
: m_idsDone(false)
, m_base(base)
, m_type(type)
, m_info(info)
, m_ownsInfo(false)
{
}
PassRefPtr<HTMLCollection> HTMLCollection::create(PassRefPtr<Node> base, CollectionType type)
{
return adoptRef(new HTMLCollection(base, type));
}
HTMLCollection::~HTMLCollection()
{
if (m_ownsInfo)
delete m_info;
}
void HTMLCollection::resetCollectionInfo() const
{
unsigned docversion = static_cast<HTMLDocument*>(m_base->document())->domTreeVersion();
if (!m_info) {
m_info = new CollectionCache;
m_ownsInfo = true;
m_info->version = docversion;
return;
}
if (m_info->version != docversion) {
m_info->reset();
m_info->version = docversion;
}
}
static Node* nextNodeOrSibling(Node* base, Node* node, bool includeChildren)
{
return includeChildren ? node->traverseNextNode(base) : node->traverseNextSibling(base);
}
Element* HTMLCollection::itemAfter(Element* previous) const
{
bool deep = true;
switch (m_type) {
case DocAll:
case DocAnchors:
case DocApplets:
case DocEmbeds:
case DocForms:
case DocImages:
case DocLinks:
case DocObjects:
case DocScripts:
case DocumentNamedItems:
case MapAreas:
case OtherCollection:
case SelectOptions:
case DataListOptions:
case WindowNamedItems:
break;
case NodeChildren:
case TRCells:
case TSectionRows:
case TableTBodies:
deep = false;
break;
}
Node* current;
if (!previous)
current = m_base->firstChild();
else
current = nextNodeOrSibling(m_base.get(), previous, deep);
for (; current; current = nextNodeOrSibling(m_base.get(), current, deep)) {
if (!current->isElementNode())
continue;
Element* e = static_cast<Element*>(current);
switch (m_type) {
case DocImages:
if (e->hasLocalName(imgTag))
return e;
break;
case DocScripts:
if (e->hasLocalName(scriptTag))
return e;
break;
case DocForms:
if (e->hasLocalName(formTag))
return e;
break;
case TableTBodies:
if (e->hasLocalName(tbodyTag))
return e;
break;
case TRCells:
if (e->hasLocalName(tdTag) || e->hasLocalName(thTag))
return e;
break;
case TSectionRows:
if (e->hasLocalName(trTag))
return e;
break;
case SelectOptions:
if (e->hasLocalName(optionTag))
return e;
break;
case DataListOptions:
if (e->hasLocalName(optionTag)) {
HTMLOptionElement* option = static_cast<HTMLOptionElement*>(e);
if (!option->disabled() && !option->value().isEmpty())
return e;
}
break;
case MapAreas:
if (e->hasLocalName(areaTag))
return e;
break;
case DocApplets: if (e->hasLocalName(appletTag))
return e;
if (e->hasLocalName(objectTag) && static_cast<HTMLObjectElement*>(e)->containsJavaApplet())
return e;
break;
case DocEmbeds:
if (e->hasLocalName(embedTag))
return e;
break;
case DocObjects:
if (e->hasLocalName(objectTag))
return e;
break;
case DocLinks: if ((e->hasLocalName(aTag) || e->hasLocalName(areaTag)) && (!e->getAttribute(hrefAttr).isNull()))
return e;
break;
case DocAnchors: if (e->hasLocalName(aTag) && !e->getAttribute(nameAttr).isNull())
return e;
break;
case DocAll:
case NodeChildren:
return e;
case DocumentNamedItems:
case OtherCollection:
case WindowNamedItems:
ASSERT_NOT_REACHED();
break;
}
}
return 0;
}
unsigned HTMLCollection::calcLength() const
{
unsigned len = 0;
for (Element* current = itemAfter(0); current; current = itemAfter(current))
++len;
return len;
}
unsigned HTMLCollection::length() const
{
resetCollectionInfo();
if (!m_info->hasLength) {
m_info->length = calcLength();
m_info->hasLength = true;
}
return m_info->length;
}
Node* HTMLCollection::item(unsigned index) const
{
resetCollectionInfo();
if (m_info->current && m_info->position == index)
return m_info->current;
if (m_info->hasLength && m_info->length <= index)
return 0;
if (!m_info->current || m_info->position > index) {
m_info->current = itemAfter(0);
m_info->position = 0;
if (!m_info->current)
return 0;
}
Element* e = m_info->current;
for (unsigned pos = m_info->position; e && pos < index; pos++)
e = itemAfter(e);
m_info->current = e;
m_info->position = index;
return m_info->current;
}
Node* HTMLCollection::firstItem() const
{
return item(0);
}
Node* HTMLCollection::nextItem() const
{
resetCollectionInfo();
Element* retval = itemAfter(m_info->current);
m_info->current = retval;
m_info->position++;
return retval;
}
bool HTMLCollection::checkForNameMatch(Element* element, bool checkName, const AtomicString& name) const
{
if (!element->isHTMLElement())
return false;
HTMLElement* e = static_cast<HTMLElement*>(element);
if (!checkName)
return e->getAttribute(e->idAttributeName()) == name;
if (m_type == DocAll &&
!(e->hasLocalName(imgTag) || e->hasLocalName(formTag) ||
e->hasLocalName(appletTag) || e->hasLocalName(objectTag) ||
e->hasLocalName(embedTag) || e->hasLocalName(inputTag) ||
e->hasLocalName(selectTag)))
return false;
return e->getAttribute(nameAttr) == name && e->getAttribute(e->idAttributeName()) != name;
}
Node* HTMLCollection::namedItem(const AtomicString& name) const
{
resetCollectionInfo();
m_idsDone = false;
for (Element* e = itemAfter(0); e; e = itemAfter(e)) {
if (checkForNameMatch(e, m_idsDone, name)) {
m_info->current = e;
return e;
}
}
m_idsDone = true;
for (Element* e = itemAfter(0); e; e = itemAfter(e)) {
if (checkForNameMatch(e, m_idsDone, name)) {
m_info->current = e;
return e;
}
}
m_info->current = 0;
return 0;
}
void HTMLCollection::updateNameCache() const
{
if (m_info->hasNameCache)
return;
for (Element* element = itemAfter(0); element; element = itemAfter(element)) {
if (!element->isHTMLElement())
continue;
HTMLElement* e = static_cast<HTMLElement*>(element);
const AtomicString& idAttrVal = e->getAttribute(e->idAttributeName());
const AtomicString& nameAttrVal = e->getAttribute(nameAttr);
if (!idAttrVal.isEmpty()) {
Vector<Element*>* idVector = m_info->idCache.get(idAttrVal.impl());
if (!idVector) {
idVector = new Vector<Element*>;
m_info->idCache.add(idAttrVal.impl(), idVector);
}
idVector->append(e);
}
if (!nameAttrVal.isEmpty() && idAttrVal != nameAttrVal
&& (m_type != DocAll ||
(e->hasLocalName(imgTag) || e->hasLocalName(formTag) ||
e->hasLocalName(appletTag) || e->hasLocalName(objectTag) ||
e->hasLocalName(embedTag) || e->hasLocalName(inputTag) ||
e->hasLocalName(selectTag)))) {
Vector<Element*>* nameVector = m_info->nameCache.get(nameAttrVal.impl());
if (!nameVector) {
nameVector = new Vector<Element*>;
m_info->nameCache.add(nameAttrVal.impl(), nameVector);
}
nameVector->append(e);
}
}
m_info->hasNameCache = true;
}
void HTMLCollection::namedItems(const AtomicString& name, Vector<RefPtr<Node> >& result) const
{
ASSERT(result.isEmpty());
if (name.isEmpty())
return;
resetCollectionInfo();
updateNameCache();
m_info->checkConsistency();
Vector<Element*>* idResults = m_info->idCache.get(name.impl());
Vector<Element*>* nameResults = m_info->nameCache.get(name.impl());
for (unsigned i = 0; idResults && i < idResults->size(); ++i)
result.append(idResults->at(i));
for (unsigned i = 0; nameResults && i < nameResults->size(); ++i)
result.append(nameResults->at(i));
}
Node* HTMLCollection::nextNamedItem(const AtomicString& name) const
{
resetCollectionInfo();
m_info->checkConsistency();
for (Element* e = itemAfter(m_info->current); e; e = itemAfter(e)) {
if (checkForNameMatch(e, m_idsDone, name)) {
m_info->current = e;
return e;
}
}
if (m_idsDone) {
m_info->current = 0;
return 0;
}
m_idsDone = true;
for (Element* e = itemAfter(m_info->current); e; e = itemAfter(e)) {
if (checkForNameMatch(e, m_idsDone, name)) {
m_info->current = e;
return e;
}
}
return 0;
}
PassRefPtr<NodeList> HTMLCollection::tags(const String& name)
{
return m_base->getElementsByTagName(name);
}
}