316 lines
9.2 KiB
C++
316 lines
9.2 KiB
C++
/*
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* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
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* (C) 1999 Antti Koivisto (koivisto@kde.org)
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* (C) 2001 Dirk Mueller (mueller@kde.org)
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* Copyright (C) 2004-2016 Apple Inc. All rights reserved.
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* (C) 2006 Alexey Proskuryakov (ap@nypop.com)
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public License
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* along with this library; see the file COPYING.LIB. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*
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*/
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#include "config.h"
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#include "FormAssociatedElement.h"
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#include "EditorClient.h"
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#include "ElementAncestorIterator.h"
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#include "FormController.h"
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#include "Frame.h"
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#include "HTMLFormControlElement.h"
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#include "HTMLFormElement.h"
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#include "HTMLNames.h"
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#include "HTMLObjectElement.h"
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#include "IdTargetObserver.h"
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namespace WebCore {
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using namespace HTMLNames;
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class FormAttributeTargetObserver final : private IdTargetObserver {
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WTF_MAKE_FAST_ALLOCATED;
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public:
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FormAttributeTargetObserver(const AtomString& id, FormAssociatedElement&);
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private:
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void idTargetChanged() override;
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FormAssociatedElement& m_element;
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};
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FormAssociatedElement::FormAssociatedElement(HTMLFormElement* form)
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: m_form(nullptr)
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, m_formSetByParser(makeWeakPtr(form))
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{
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}
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FormAssociatedElement::~FormAssociatedElement()
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{
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RELEASE_ASSERT(!m_form);
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}
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void FormAssociatedElement::didMoveToNewDocument(Document&)
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{
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HTMLElement& element = asHTMLElement();
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if (element.hasAttributeWithoutSynchronization(formAttr) && element.isConnected())
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resetFormAttributeTargetObserver();
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}
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void FormAssociatedElement::insertedIntoAncestor(Node::InsertionType insertionType, ContainerNode&)
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{
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HTMLElement& element = asHTMLElement();
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if (m_formSetByParser) {
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// The form could have been removed by a script during parsing.
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if (m_formSetByParser->isConnected())
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setForm(m_formSetByParser.get());
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m_formSetByParser = nullptr;
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}
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if (m_form && element.rootElement() != m_form->rootElement())
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setForm(nullptr);
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if (!insertionType.connectedToDocument)
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return;
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if (element.hasAttributeWithoutSynchronization(formAttr))
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resetFormAttributeTargetObserver();
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}
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void FormAssociatedElement::removedFromAncestor(Node::RemovalType, ContainerNode&)
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{
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m_formAttributeTargetObserver = nullptr;
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// If the form and element are both in the same tree, preserve the connection to the form.
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// Otherwise, null out our form and remove ourselves from the form's list of elements.
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// Do not rely on rootNode() because our IsInTreeScope is outdated.
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if (m_form && &asHTMLElement().traverseToRootNode() != &m_form->traverseToRootNode())
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setForm(nullptr);
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}
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HTMLFormElement* FormAssociatedElement::findAssociatedForm(const HTMLElement* element, HTMLFormElement* currentAssociatedForm)
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{
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const AtomString& formId(element->attributeWithoutSynchronization(formAttr));
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if (!formId.isNull() && element->isConnected()) {
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// The HTML5 spec says that the element should be associated with
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// the first element in the document to have an ID that equal to
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// the value of form attribute, so we put the result of
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// treeScope().getElementById() over the given element.
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RefPtr<Element> newFormCandidate = element->treeScope().getElementById(formId);
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if (!is<HTMLFormElement>(newFormCandidate))
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return nullptr;
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if (&element->traverseToRootNode() == &element->treeScope().rootNode()) {
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ASSERT(&element->traverseToRootNode() == &newFormCandidate->traverseToRootNode());
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return downcast<HTMLFormElement>(newFormCandidate.get());
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}
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}
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if (!currentAssociatedForm)
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return HTMLFormElement::findClosestFormAncestor(*element);
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return currentAssociatedForm;
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}
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HTMLFormElement* FormAssociatedElement::form() const
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{
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return m_form.get();
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}
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void FormAssociatedElement::formOwnerRemovedFromTree(const Node& formRoot)
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{
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ASSERT(m_form);
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// Can't use RefPtr here beacuse this function might be called inside ~ShadowRoot via addChildNodesToDeletionQueue. See webkit.org/b/189493.
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Node* rootNode = &asHTMLElement();
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for (auto* ancestor = asHTMLElement().parentNode(); ancestor; ancestor = ancestor->parentNode()) {
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if (ancestor == m_form) {
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// Form is our ancestor so we don't need to reset our owner, we also no longer
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// need an id observer since we are no longer connected.
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m_formAttributeTargetObserver = nullptr;
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return;
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}
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rootNode = ancestor;
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}
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// We are no longer in the same tree as our form owner so clear our owner.
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if (rootNode != &formRoot)
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setForm(nullptr);
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}
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void FormAssociatedElement::setForm(HTMLFormElement* newForm)
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{
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if (m_form == newForm)
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return;
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willChangeForm();
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if (m_form)
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m_form->removeFormElement(this);
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m_form = makeWeakPtr(newForm);
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if (newForm)
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newForm->registerFormElement(this);
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didChangeForm();
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}
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void FormAssociatedElement::willChangeForm()
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{
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}
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void FormAssociatedElement::didChangeForm()
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{
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}
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void FormAssociatedElement::formWillBeDestroyed()
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{
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ASSERT(m_form);
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if (!m_form)
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return;
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willChangeForm();
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m_form = nullptr;
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didChangeForm();
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}
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void FormAssociatedElement::resetFormOwner()
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{
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RefPtr<HTMLFormElement> originalForm = m_form.get();
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setForm(findAssociatedForm(&asHTMLElement(), originalForm.get()));
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HTMLElement& element = asHTMLElement();
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auto* newForm = m_form.get();
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if (newForm && newForm != originalForm && newForm->isConnected())
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element.document().didAssociateFormControl(element);
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}
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void FormAssociatedElement::formAttributeChanged()
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{
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HTMLElement& element = asHTMLElement();
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if (!element.hasAttributeWithoutSynchronization(formAttr)) {
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// The form attribute removed. We need to reset form owner here.
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RefPtr<HTMLFormElement> originalForm = m_form.get();
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// FIXME: Why does this not pass originalForm to findClosestFormAncestor?
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setForm(HTMLFormElement::findClosestFormAncestor(element));
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auto* newForm = m_form.get();
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if (newForm && newForm != originalForm && newForm->isConnected())
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element.document().didAssociateFormControl(element);
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m_formAttributeTargetObserver = nullptr;
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} else {
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resetFormOwner();
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if (element.isConnected())
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resetFormAttributeTargetObserver();
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}
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}
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bool FormAssociatedElement::customError() const
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{
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return willValidate() && !m_customValidationMessage.isEmpty();
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}
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bool FormAssociatedElement::hasBadInput() const
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{
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return false;
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}
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bool FormAssociatedElement::patternMismatch() const
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{
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return false;
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}
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bool FormAssociatedElement::rangeOverflow() const
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{
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return false;
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}
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bool FormAssociatedElement::rangeUnderflow() const
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{
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return false;
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}
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bool FormAssociatedElement::stepMismatch() const
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{
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return false;
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}
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bool FormAssociatedElement::tooShort() const
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{
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return false;
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}
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bool FormAssociatedElement::tooLong() const
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{
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return false;
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}
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bool FormAssociatedElement::typeMismatch() const
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{
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return false;
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}
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bool FormAssociatedElement::isValid() const
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{
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bool someError = typeMismatch() || stepMismatch() || rangeUnderflow() || rangeOverflow()
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|| tooShort() || tooLong() || patternMismatch() || valueMissing() || hasBadInput() || customError();
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return !someError;
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}
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bool FormAssociatedElement::valueMissing() const
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{
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return false;
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}
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String FormAssociatedElement::customValidationMessage() const
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{
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return m_customValidationMessage;
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}
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String FormAssociatedElement::validationMessage() const
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{
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return customError() ? m_customValidationMessage : String();
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}
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void FormAssociatedElement::setCustomValidity(const String& error)
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{
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m_customValidationMessage = error;
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}
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void FormAssociatedElement::resetFormAttributeTargetObserver()
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{
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ASSERT_WITH_SECURITY_IMPLICATION(asHTMLElement().isConnected());
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m_formAttributeTargetObserver = makeUnique<FormAttributeTargetObserver>(asHTMLElement().attributeWithoutSynchronization(formAttr), *this);
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}
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void FormAssociatedElement::formAttributeTargetChanged()
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{
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resetFormOwner();
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}
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const AtomString& FormAssociatedElement::name() const
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{
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const AtomString& name = asHTMLElement().getNameAttribute();
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return name.isNull() ? emptyAtom() : name;
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}
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bool FormAssociatedElement::isFormControlElementWithState() const
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{
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return false;
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}
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FormAttributeTargetObserver::FormAttributeTargetObserver(const AtomString& id, FormAssociatedElement& element)
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: IdTargetObserver(element.asHTMLElement().treeScope().idTargetObserverRegistry(), id)
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, m_element(element)
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{
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}
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void FormAttributeTargetObserver::idTargetChanged()
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{
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m_element.formAttributeTargetChanged();
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}
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} // namespace Webcore
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