| /* |
| * Copyright (C) 1999 Lars Knoll (knoll@kde.org) |
| * (C) 1999 Antti Koivisto (koivisto@kde.org) |
| * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008 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 "HTMLCollection.h" |
| |
| #include "HTMLDocument.h" |
| #include "HTMLElement.h" |
| #include "HTMLNames.h" |
| #include "HTMLObjectElement.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 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 MapAreas: |
| if (e->hasLocalName(areaTag)) |
| return e; |
| break; |
| case DocApplets: // all <applet> elements and <object> elements that contain Java Applets |
| 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: // all <a> and <area> elements with a value for href |
| if ((e->hasLocalName(aTag) || e->hasLocalName(areaTag)) && (!e->getAttribute(hrefAttr).isNull())) |
| return e; |
| break; |
| case DocAnchors: // all <a> elements with a value for name |
| 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; |
| } |
| |
| // since the collections are to be "live", we have to do the |
| // calculation every time if anything has changed |
| 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(); |
| |
| // Look for the 'second' item. The first one is currentItem, already given back. |
| 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(idAttr) == name; |
| |
| // document.all returns only images, forms, applets, objects and embeds |
| // by name (though everything by id) |
| 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(idAttr) != name; |
| } |
| |
| Node* HTMLCollection::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; |
| |
| 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(idAttr); |
| const AtomicString& nameAttrVal = e->getAttribute(nameAttr); |
| if (!idAttrVal.isEmpty()) { |
| // add to id cache |
| 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)))) { |
| // add to name cache |
| 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(); |
| |
| 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(); |
| |
| 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); |
| } |
| |
| } // namespace WebCore |
