diff -r 000000000000 -r 4f2f89ce4247 WebCore/html/HTMLFormElement.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/WebCore/html/HTMLFormElement.cpp	Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,663 @@
+/*
+ * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
+ *           (C) 1999 Antti Koivisto (koivisto@kde.org)
+ *           (C) 2001 Dirk Mueller (mueller@kde.org)
+ * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
+ *           (C) 2006 Alexey Proskuryakov (ap@nypop.com)
+ *
+ * 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 "HTMLFormElement.h"
+
+#include "Attribute.h"
+#include "DOMFormData.h"
+#include "DOMWindow.h"
+#include "Document.h"
+#include "Event.h"
+#include "EventNames.h"
+#include "FileList.h"
+#include "FileSystem.h"
+#include "FormData.h"
+#include "FormDataList.h"
+#include "FormState.h"
+#include "FormSubmission.h"
+#include "Frame.h"
+#include "FrameLoader.h"
+#include "FrameLoaderClient.h"
+#include "HTMLDocument.h"
+#include "HTMLFormCollection.h"
+#include "HTMLImageElement.h"
+#include "HTMLInputElement.h"
+#include "HTMLNames.h"
+#include "MIMETypeRegistry.h"
+#include "RenderTextControl.h"
+#include "ScriptEventListener.h"
+#include "ValidityState.h"
+#include <limits>
+#include <wtf/CurrentTime.h>
+#include <wtf/RandomNumber.h>
+
+#if PLATFORM(WX)
+#include <wx/defs.h>
+#include <wx/filename.h>
+#endif
+
+using namespace std;
+
+namespace WebCore {
+
+using namespace HTMLNames;
+
+static int64_t generateFormDataIdentifier()
+{
+    // Initialize to the current time to reduce the likelihood of generating
+    // identifiers that overlap with those from past/future browser sessions.
+    static int64_t nextIdentifier = static_cast<int64_t>(currentTime() * 1000000.0);
+    return ++nextIdentifier;
+}
+
+HTMLFormElement::HTMLFormElement(const QualifiedName& tagName, Document* document)
+    : HTMLElement(tagName, document)
+    , m_submissionTrigger(NotSubmittedByJavaScript)
+    , m_autocomplete(true)
+    , m_insubmit(false)
+    , m_doingsubmit(false)
+    , m_inreset(false)
+    , m_malformed(false)
+    , m_demoted(false)
+{
+    ASSERT(hasTagName(formTag));
+}
+
+PassRefPtr<HTMLFormElement> HTMLFormElement::create(Document* document)
+{
+    return adoptRef(new HTMLFormElement(formTag, document));
+}
+
+PassRefPtr<HTMLFormElement> HTMLFormElement::create(const QualifiedName& tagName, Document* document)
+{
+    return adoptRef(new HTMLFormElement(tagName, document));
+}
+
+HTMLFormElement::~HTMLFormElement()
+{
+    if (!m_autocomplete)
+        document()->unregisterForDocumentActivationCallbacks(this);
+
+    for (unsigned i = 0; i < m_associatedElements.size(); ++i)
+        m_associatedElements[i]->formDestroyed();
+    for (unsigned i = 0; i < m_imageElements.size(); ++i)
+        m_imageElements[i]->m_form = 0;
+}
+
+bool HTMLFormElement::formWouldHaveSecureSubmission(const String& url)
+{
+    return document()->completeURL(url).protocolIs("https");
+}
+
+bool HTMLFormElement::rendererIsNeeded(RenderStyle* style)
+{
+    if (!isDemoted())
+        return HTMLElement::rendererIsNeeded(style);
+    
+    Node* node = parentNode();
+    RenderObject* parentRenderer = node->renderer();
+    bool parentIsTableElementPart = (parentRenderer->isTable() && node->hasTagName(tableTag))
+        || (parentRenderer->isTableRow() && node->hasTagName(trTag))
+        || (parentRenderer->isTableSection() && node->hasTagName(tbodyTag))
+        || (parentRenderer->isTableCol() && node->hasTagName(colTag)) 
+        || (parentRenderer->isTableCell() && node->hasTagName(trTag));
+
+    if (!parentIsTableElementPart)
+        return true;
+
+    EDisplay display = style->display();
+    bool formIsTablePart = display == TABLE || display == INLINE_TABLE || display == TABLE_ROW_GROUP
+        || display == TABLE_HEADER_GROUP || display == TABLE_FOOTER_GROUP || display == TABLE_ROW
+        || display == TABLE_COLUMN_GROUP || display == TABLE_COLUMN || display == TABLE_CELL
+        || display == TABLE_CAPTION;
+
+    return formIsTablePart;
+}
+
+void HTMLFormElement::insertedIntoDocument()
+{
+    if (document()->isHTMLDocument())
+        static_cast<HTMLDocument*>(document())->addNamedItem(m_name);
+
+    HTMLElement::insertedIntoDocument();
+}
+
+void HTMLFormElement::removedFromDocument()
+{
+    if (document()->isHTMLDocument())
+        static_cast<HTMLDocument*>(document())->removeNamedItem(m_name);
+   
+    HTMLElement::removedFromDocument();
+}
+
+void HTMLFormElement::handleLocalEvents(Event* event)
+{
+    Node* targetNode = event->target()->toNode();
+    if (event->eventPhase() != Event::CAPTURING_PHASE && targetNode && targetNode != this && (event->type() == eventNames().submitEvent || event->type() == eventNames().resetEvent)) {
+        event->stopPropagation();
+        return;
+    }
+    HTMLElement::handleLocalEvents(event);
+}
+
+unsigned HTMLFormElement::length() const
+{
+    unsigned len = 0;
+    for (unsigned i = 0; i < m_associatedElements.size(); ++i)
+        if (m_associatedElements[i]->isEnumeratable())
+            ++len;
+    return len;
+}
+
+Node* HTMLFormElement::item(unsigned index)
+{
+    return elements()->item(index);
+}
+
+void HTMLFormElement::submitImplicitly(Event* event, bool fromImplicitSubmissionTrigger)
+{
+    int submissionTriggerCount = 0;
+    for (unsigned i = 0; i < m_associatedElements.size(); ++i) {
+        HTMLFormControlElement* formElement = m_associatedElements[i];
+        if (formElement->isSuccessfulSubmitButton()) {
+            if (formElement->renderer()) {
+                formElement->dispatchSimulatedClick(event);
+                return;
+            }
+        } else if (formElement->canTriggerImplicitSubmission())
+            ++submissionTriggerCount;
+    }
+    if (fromImplicitSubmissionTrigger && submissionTriggerCount == 1)
+        prepareSubmit(event);
+}
+
+static void appendMailtoPostFormDataToURL(KURL& url, const FormData& data, const String& encodingType)
+{
+    String body = data.flattenToString();
+
+    if (equalIgnoringCase(encodingType, "text/plain")) {
+        // Convention seems to be to decode, and s/&/\r\n/. Also, spaces are encoded as %20.
+        body = decodeURLEscapeSequences(body.replace('&', "\r\n").replace('+', ' ') + "\r\n");
+    }
+
+    Vector<char> bodyData;
+    bodyData.append("body=", 5);
+    FormDataBuilder::encodeStringAsFormData(bodyData, body.utf8());
+    body = String(bodyData.data(), bodyData.size()).replace('+', "%20");
+
+    String query = url.query();
+    if (!query.isEmpty())
+        query.append('&');
+    query.append(body);
+    url.setQuery(query);
+}
+
+PassRefPtr<FormSubmission> HTMLFormElement::prepareFormSubmission(Event* event, bool lockHistory, FormSubmissionTrigger trigger)
+{
+    KURL actionURL = document()->completeURL(m_formDataBuilder.action().isEmpty() ? document()->url().string() : m_formDataBuilder.action());
+    bool isMailtoForm = actionURL.protocolIs("mailto");
+
+    if (m_formDataBuilder.isPostMethod()) {
+        if (m_formDataBuilder.isMultiPartForm() && isMailtoForm) {
+            m_formDataBuilder.parseEncodingType("application/x-www-form-urlencoded");
+            ASSERT(!m_formDataBuilder.isMultiPartForm());
+        }
+    } else
+        m_formDataBuilder.setIsMultiPartForm(false);
+
+    TextEncoding dataEncoding = isMailtoForm ? UTF8Encoding() : m_formDataBuilder.dataEncoding(document());
+    RefPtr<DOMFormData> domFormData = DOMFormData::create(dataEncoding.encodingForFormSubmission());
+    Vector<pair<String, String> > formValues;
+
+    for (unsigned i = 0; i < m_associatedElements.size(); ++i) {
+        HTMLFormControlElement* control = m_associatedElements[i];
+        if (!control->disabled())
+            control->appendFormData(*domFormData, m_formDataBuilder.isMultiPartForm());
+        if (control->hasLocalName(inputTag)) {
+            HTMLInputElement* input = static_cast<HTMLInputElement*>(control);
+            if (input->isTextField()) {
+                formValues.append(pair<String, String>(input->name(), input->value()));
+                if (input->isSearchField())
+                    input->addSearchResult();
+            }
+        }
+    }
+
+    RefPtr<FormData> formData;
+    String boundary;
+
+    if (m_formDataBuilder.isMultiPartForm()) {
+        formData = FormData::createMultiPart(domFormData->items(), domFormData->encoding(), document());
+        boundary = formData->boundary().data();
+    } else {
+        formData = FormData::create(domFormData->items(), domFormData->encoding());
+        if (m_formDataBuilder.isPostMethod() && isMailtoForm) {
+            // Convert the form data into a string that we put into the URL.
+            appendMailtoPostFormDataToURL(actionURL, *formData, m_formDataBuilder.encodingType());
+            formData = FormData::create();
+        }
+    }
+
+    formData->setIdentifier(generateFormDataIdentifier());
+    FormSubmission::Method method = m_formDataBuilder.isPostMethod() ? FormSubmission::PostMethod : FormSubmission::GetMethod;
+    String targetOrBaseTarget = m_formDataBuilder.target().isEmpty() ? document()->baseTarget() : m_formDataBuilder.target();
+    return FormSubmission::create(method, actionURL, targetOrBaseTarget, m_formDataBuilder.encodingType(), FormState::create(this, formValues, document()->frame(), trigger), formData.release(), boundary, lockHistory, event);
+}
+
+static inline HTMLFormControlElement* submitElementFromEvent(const Event* event)
+{
+    Node* targetNode = event->target()->toNode();
+    if (!targetNode || !targetNode->isElementNode())
+        return 0;
+    Element* targetElement = static_cast<Element*>(targetNode);
+    if (!targetElement->isFormControlElement())
+        return 0;
+    return static_cast<HTMLFormControlElement*>(targetElement);
+}
+
+bool HTMLFormElement::validateInteractively(Event* event)
+{
+    ASSERT(event);
+    if (!document()->inStrictMode() || noValidate())
+        return true;
+
+    HTMLFormControlElement* submitElement = submitElementFromEvent(event);
+    if (submitElement && submitElement->formNoValidate())
+        return true;
+
+    Vector<RefPtr<HTMLFormControlElement> > unhandledInvalidControls;
+    collectUnhandledInvalidControls(unhandledInvalidControls);
+    if (unhandledInvalidControls.isEmpty())
+        return true;
+    // If the form has invalid controls, abort submission.
+
+    RefPtr<HTMLFormElement> protector(this);
+    // Focus on the first focusable control.
+    for (unsigned i = 0; i < unhandledInvalidControls.size(); ++i) {
+        HTMLFormControlElement* unhandled = unhandledInvalidControls[i].get();
+        if (unhandled->isFocusable() && unhandled->inDocument()) {
+            RefPtr<Document> originalDocument(unhandled->document());
+            unhandled->scrollIntoViewIfNeeded(false);
+            // scrollIntoViewIfNeeded() dispatches events, so the state
+            // of 'unhandled' might be changed so it's no longer focusable or
+            // moved to another document.
+            if (unhandled->isFocusable() && unhandled->inDocument() && originalDocument == unhandled->document()) {
+                unhandled->focus();
+                break;
+            }
+        }
+    }
+    // Warn about all of unfocusable controls.
+    if (Frame* frame = document()->frame()) {
+        for (unsigned i = 0; i < unhandledInvalidControls.size(); ++i) {
+            HTMLFormControlElement* unhandled = unhandledInvalidControls[i].get();
+            if (unhandled->isFocusable() && unhandled->inDocument())
+                continue;
+            String message("An invalid form control with name='%name' is not focusable.");
+            message.replace("%name", unhandled->name());
+            frame->domWindow()->console()->addMessage(HTMLMessageSource, LogMessageType, ErrorMessageLevel, message, 0, document()->url().string());
+        }
+    }
+    m_insubmit = false;
+    return false;
+}
+
+bool HTMLFormElement::prepareSubmit(Event* event)
+{
+    Frame* frame = document()->frame();
+    if (m_insubmit || !frame)
+        return m_insubmit;
+
+    m_insubmit = true;
+    m_doingsubmit = false;
+
+    // Interactive validation must be done before dispatching the submit event.
+    if (!validateInteractively(event))
+        return false;
+
+    frame->loader()->client()->dispatchWillSendSubmitEvent(this);
+
+    if (dispatchEvent(Event::create(eventNames().submitEvent, true, true)) && !m_doingsubmit)
+        m_doingsubmit = true;
+
+    m_insubmit = false;
+
+    if (m_doingsubmit)
+        submit(event, true, false, NotSubmittedByJavaScript);
+
+    return m_doingsubmit;
+}
+
+void HTMLFormElement::submit(Frame* javaScriptActiveFrame)
+{
+    if (javaScriptActiveFrame)
+        submit(0, false, !javaScriptActiveFrame->script()->anyPageIsProcessingUserGesture(), SubmittedByJavaScript);
+    else
+        submit(0, false, false, NotSubmittedByJavaScript);
+}
+
+void HTMLFormElement::submit(Event* event, bool activateSubmitButton, bool lockHistory, FormSubmissionTrigger formSubmissionTrigger)
+{
+    FrameView* view = document()->view();
+    Frame* frame = document()->frame();
+    if (!view || !frame)
+        return;
+
+    if (m_insubmit) {
+        m_doingsubmit = true;
+        return;
+    }
+
+    m_insubmit = true;
+    m_submissionTrigger = formSubmissionTrigger;
+
+    HTMLFormControlElement* firstSuccessfulSubmitButton = 0;
+    bool needButtonActivation = activateSubmitButton; // do we need to activate a submit button?
+    
+    for (unsigned i = 0; i < m_associatedElements.size(); ++i) {
+        HTMLFormControlElement* control = m_associatedElements[i];
+        if (needButtonActivation) {
+            if (control->isActivatedSubmit())
+                needButtonActivation = false;
+            else if (firstSuccessfulSubmitButton == 0 && control->isSuccessfulSubmitButton())
+                firstSuccessfulSubmitButton = control;
+        }
+    }
+
+    if (needButtonActivation && firstSuccessfulSubmitButton)
+        firstSuccessfulSubmitButton->setActivatedSubmit(true);
+
+    frame->loader()->submitForm(prepareFormSubmission(event, lockHistory, formSubmissionTrigger));
+
+    if (needButtonActivation && firstSuccessfulSubmitButton)
+        firstSuccessfulSubmitButton->setActivatedSubmit(false);
+    
+    m_doingsubmit = m_insubmit = false;
+}
+
+void HTMLFormElement::reset()
+{
+    Frame* frame = document()->frame();
+    if (m_inreset || !frame)
+        return;
+
+    m_inreset = true;
+
+    // ### DOM2 labels this event as not cancelable, however
+    // common browsers( sick! ) allow it be cancelled.
+    if (!dispatchEvent(Event::create(eventNames().resetEvent, true, true))) {
+        m_inreset = false;
+        return;
+    }
+
+    for (unsigned i = 0; i < m_associatedElements.size(); ++i)
+        m_associatedElements[i]->reset();
+
+    m_inreset = false;
+}
+
+void HTMLFormElement::parseMappedAttribute(Attribute* attr)
+{
+    if (attr->name() == actionAttr)
+        m_formDataBuilder.parseAction(attr->value());
+    else if (attr->name() == targetAttr)
+        m_formDataBuilder.setTarget(attr->value());
+    else if (attr->name() == methodAttr)
+        m_formDataBuilder.parseMethodType(attr->value());
+    else if (attr->name() == enctypeAttr)
+        m_formDataBuilder.parseEncodingType(attr->value());
+    else if (attr->name() == accept_charsetAttr)
+        // space separated list of charsets the server
+        // accepts - see rfc2045
+        m_formDataBuilder.setAcceptCharset(attr->value());
+    else if (attr->name() == acceptAttr) {
+        // ignore this one for the moment...
+    } else if (attr->name() == autocompleteAttr) {
+        m_autocomplete = !equalIgnoringCase(attr->value(), "off");
+        if (!m_autocomplete)
+            document()->registerForDocumentActivationCallbacks(this);    
+        else
+            document()->unregisterForDocumentActivationCallbacks(this);
+    } else if (attr->name() == onsubmitAttr)
+        setAttributeEventListener(eventNames().submitEvent, createAttributeEventListener(this, attr));
+    else if (attr->name() == onresetAttr)
+        setAttributeEventListener(eventNames().resetEvent, createAttributeEventListener(this, attr));
+    else if (attr->name() == nameAttr) {
+        const AtomicString& newName = attr->value();
+        if (inDocument() && document()->isHTMLDocument()) {
+            HTMLDocument* document = static_cast<HTMLDocument*>(this->document());
+            document->removeNamedItem(m_name);
+            document->addNamedItem(newName);
+        }
+        m_name = newName;
+    } else
+        HTMLElement::parseMappedAttribute(attr);
+}
+
+template<class T, size_t n> static void removeFromVector(Vector<T*, n> & vec, T* item)
+{
+    size_t size = vec.size();
+    for (size_t i = 0; i != size; ++i)
+        if (vec[i] == item) {
+            vec.remove(i);
+            break;
+        }
+}
+
+unsigned HTMLFormElement::formElementIndex(HTMLFormControlElement* e)
+{
+    // Check for the special case where this element is the very last thing in
+    // the form's tree of children; we don't want to walk the entire tree in that
+    // common case that occurs during parsing; instead we'll just return a value
+    // that says "add this form element to the end of the array".
+    if (e->traverseNextNode(this)) {
+        unsigned i = 0;
+        for (Node* node = this; node; node = node->traverseNextNode(this)) {
+            if (node == e)
+                return i;
+            if (node->isHTMLElement()
+                    && static_cast<Element*>(node)->isFormControlElement()
+                    && static_cast<HTMLFormControlElement*>(node)->form() == this)
+                ++i;
+        }
+    }
+    return m_associatedElements.size();
+}
+
+void HTMLFormElement::registerFormElement(HTMLFormControlElement* e)
+{
+    document()->checkedRadioButtons().removeButton(e);
+    m_checkedRadioButtons.addButton(e);
+    m_associatedElements.insert(formElementIndex(e), e);
+}
+
+void HTMLFormElement::removeFormElement(HTMLFormControlElement* e)
+{
+    m_checkedRadioButtons.removeButton(e);
+    removeFromVector(m_associatedElements, e);
+}
+
+bool HTMLFormElement::isURLAttribute(Attribute* attr) const
+{
+    return attr->name() == actionAttr;
+}
+
+void HTMLFormElement::registerImgElement(HTMLImageElement* e)
+{
+    ASSERT(m_imageElements.find(e) == notFound);
+    m_imageElements.append(e);
+}
+
+void HTMLFormElement::removeImgElement(HTMLImageElement* e)
+{
+    ASSERT(m_imageElements.find(e) != notFound);
+    removeFromVector(m_imageElements, e);
+}
+
+PassRefPtr<HTMLCollection> HTMLFormElement::elements()
+{
+    return HTMLFormCollection::create(this);
+}
+
+String HTMLFormElement::name() const
+{
+    return getAttribute(nameAttr);
+}
+
+bool HTMLFormElement::noValidate() const
+{
+    return !getAttribute(novalidateAttr).isNull();
+}
+
+String HTMLFormElement::action() const
+{
+    return getAttribute(actionAttr);
+}
+
+void HTMLFormElement::setAction(const String &value)
+{
+    setAttribute(actionAttr, value);
+}
+
+void HTMLFormElement::setEnctype(const String &value)
+{
+    setAttribute(enctypeAttr, value);
+}
+
+String HTMLFormElement::method() const
+{
+    return getAttribute(methodAttr);
+}
+
+void HTMLFormElement::setMethod(const String &value)
+{
+    setAttribute(methodAttr, value);
+}
+
+String HTMLFormElement::target() const
+{
+    return getAttribute(targetAttr);
+}
+
+FormSubmissionTrigger HTMLFormElement::submissionTrigger() const
+{
+    return m_submissionTrigger;
+}
+
+HTMLFormControlElement* HTMLFormElement::defaultButton() const
+{
+    for (unsigned i = 0; i < m_associatedElements.size(); ++i) {
+        HTMLFormControlElement* control = m_associatedElements[i];
+        if (control->isSuccessfulSubmitButton())
+            return control;
+    }
+
+    return 0;
+}
+
+bool HTMLFormElement::checkValidity()
+{
+    Vector<RefPtr<HTMLFormControlElement> > controls;
+    collectUnhandledInvalidControls(controls);
+    return controls.isEmpty();
+}
+
+void HTMLFormElement::collectUnhandledInvalidControls(Vector<RefPtr<HTMLFormControlElement> >& unhandledInvalidControls)
+{
+    RefPtr<HTMLFormElement> protector(this);
+    // Copy m_associatedElements because event handlers called from
+    // HTMLFormControlElement::checkValidity() might change m_associatedElements.
+    Vector<RefPtr<HTMLFormControlElement> > elements;
+    elements.reserveCapacity(m_associatedElements.size());
+    for (unsigned i = 0; i < m_associatedElements.size(); ++i)
+        elements.append(m_associatedElements[i]);
+    for (unsigned i = 0; i < elements.size(); ++i) {
+        if (elements[i]->form() == this)
+            elements[i]->checkValidity(&unhandledInvalidControls);
+    }
+}
+
+PassRefPtr<HTMLFormControlElement> HTMLFormElement::elementForAlias(const AtomicString& alias)
+{
+    if (alias.isEmpty() || !m_elementAliases)
+        return 0;
+    return m_elementAliases->get(alias.impl());
+}
+
+void HTMLFormElement::addElementAlias(HTMLFormControlElement* element, const AtomicString& alias)
+{
+    if (alias.isEmpty())
+        return;
+    if (!m_elementAliases)
+        m_elementAliases.set(new AliasMap);
+    m_elementAliases->set(alias.impl(), element);
+}
+
+void HTMLFormElement::getNamedElements(const AtomicString& name, Vector<RefPtr<Node> >& namedItems)
+{
+    elements()->namedItems(name, namedItems);
+
+    // see if we have seen something with this name before
+    RefPtr<HTMLFormControlElement> aliasElem;
+    if ((aliasElem = elementForAlias(name))) {
+        bool found = false;
+        for (unsigned n = 0; n < namedItems.size(); n++) {
+            if (namedItems[n] == aliasElem.get()) {
+                found = true;
+                break;
+            }
+        }
+        if (!found)
+            // we have seen it before but it is gone now. still, we need to return it.
+            namedItems.append(aliasElem.get());
+    }
+    // name has been accessed, remember it
+    if (namedItems.size() && aliasElem != namedItems.first())
+        addElementAlias(static_cast<HTMLFormControlElement*>(namedItems.first().get()), name);        
+}
+
+void HTMLFormElement::documentDidBecomeActive()
+{
+    ASSERT(!m_autocomplete);
+    
+    for (unsigned i = 0; i < m_associatedElements.size(); ++i)
+        m_associatedElements[i]->reset();
+}
+
+void HTMLFormElement::willMoveToNewOwnerDocument()
+{
+    if (!m_autocomplete)
+        document()->unregisterForDocumentActivationCallbacks(this);
+    HTMLElement::willMoveToNewOwnerDocument();
+}
+
+void HTMLFormElement::didMoveToNewOwnerDocument()
+{
+    if (!m_autocomplete)
+        document()->registerForDocumentActivationCallbacks(this);
+    HTMLElement::didMoveToNewOwnerDocument();
+}
+
+} // namespace