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/*
* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
* (C) 1999 Antti Koivisto (koivisto@kde.org)
* (C) 2001 Dirk Mueller (mueller@kde.org)
* Copyright (C) 2004-2020 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 "HTMLFormControlElement.h"
#include "Autofill.h"
#include "ControlStates.h"
#include "ElementAncestorIterator.h"
#include "Event.h"
#include "EventHandler.h"
#include "EventNames.h"
#include "Frame.h"
#include "FrameView.h"
#include "HTMLDataListElement.h"
#include "HTMLFieldSetElement.h"
#include "HTMLFormElement.h"
#include "HTMLInputElement.h"
#include "HTMLLegendElement.h"
#include "HTMLTextAreaElement.h"
#include "Quirks.h"
#include "RenderBox.h"
#include "RenderTheme.h"
#include "ScriptDisallowedScope.h"
#include "Settings.h"
#include "StyleTreeResolver.h"
#include "ValidationMessage.h"
#include <wtf/IsoMallocInlines.h>
#include <wtf/Ref.h>
#include <wtf/Vector.h>
namespace WebCore {
WTF_MAKE_ISO_ALLOCATED_IMPL(HTMLFormControlElement);
using namespace HTMLNames;
HTMLFormControlElement::HTMLFormControlElement(const QualifiedName& tagName, Document& document, HTMLFormElement* form)
: LabelableElement(tagName, document)
, FormAssociatedElement(form)
, m_disabled(false)
, m_isReadOnly(false)
, m_isRequired(false)
, m_valueMatchesRenderer(false)
, m_disabledByAncestorFieldset(false)
, m_dataListAncestorState(Unknown)
, m_willValidateInitialized(false)
, m_willValidate(true)
, m_isValid(true)
, m_wasChangedSinceLastFormControlChangeEvent(false)
, m_hasAutofocused(false)
{
setHasCustomStyleResolveCallbacks();
}
HTMLFormControlElement::~HTMLFormControlElement()
{
clearForm();
}
String HTMLFormControlElement::formEnctype() const
{
const AtomString& formEnctypeAttr = attributeWithoutSynchronization(formenctypeAttr);
if (formEnctypeAttr.isNull())
return emptyString();
return FormSubmission::Attributes::parseEncodingType(formEnctypeAttr);
}
void HTMLFormControlElement::setFormEnctype(const String& value)
{
setAttributeWithoutSynchronization(formenctypeAttr, value);
}
String HTMLFormControlElement::formMethod() const
{
auto& formMethodAttr = attributeWithoutSynchronization(formmethodAttr);
if (formMethodAttr.isNull())
return emptyString();
return FormSubmission::Attributes::methodString(FormSubmission::Attributes::parseMethodType(formMethodAttr));
}
void HTMLFormControlElement::setFormMethod(const String& value)
{
setAttributeWithoutSynchronization(formmethodAttr, value);
}
bool HTMLFormControlElement::formNoValidate() const
{
return hasAttributeWithoutSynchronization(formnovalidateAttr);
}
String HTMLFormControlElement::formAction() const
{
const AtomString& value = attributeWithoutSynchronization(formactionAttr);
if (value.isEmpty())
return document().url();
return getURLAttribute(formactionAttr);
}
void HTMLFormControlElement::setFormAction(const AtomString& value)
{
setAttributeWithoutSynchronization(formactionAttr, value);
}
bool HTMLFormControlElement::computeIsDisabledByFieldsetAncestor() const
{
RefPtr<Element> previousAncestor;
for (RefPtr<Element> ancestor = parentElement(); ancestor; ancestor = ancestor->parentElement()) {
if (is<HTMLFieldSetElement>(*ancestor) && ancestor->hasAttributeWithoutSynchronization(disabledAttr)) {
HTMLFieldSetElement& fieldSetAncestor = downcast<HTMLFieldSetElement>(*ancestor);
bool isInFirstLegend = is<HTMLLegendElement>(previousAncestor) && previousAncestor == fieldSetAncestor.legend();
return !isInFirstLegend;
}
previousAncestor = ancestor;
}
return false;
}
void HTMLFormControlElement::setAncestorDisabled(bool isDisabled)
{
ASSERT(computeIsDisabledByFieldsetAncestor() == isDisabled);
bool oldValue = m_disabledByAncestorFieldset;
m_disabledByAncestorFieldset = isDisabled;
if (oldValue != m_disabledByAncestorFieldset)
disabledStateChanged();
}
void HTMLFormControlElement::parseAttribute(const QualifiedName& name, const AtomString& value)
{
if (name == formAttr)
formAttributeChanged();
else if (name == disabledAttr) {
if (canBeActuallyDisabled()) {
bool oldDisabled = m_disabled;
m_disabled = !value.isNull();
if (oldDisabled != m_disabled)
disabledAttributeChanged();
}
} else if (name == readonlyAttr) {
bool wasReadOnly = m_isReadOnly;
m_isReadOnly = !value.isNull();
if (wasReadOnly != m_isReadOnly)
readOnlyStateChanged();
} else if (name == requiredAttr) {
bool wasRequired = m_isRequired;
m_isRequired = !value.isNull();
if (wasRequired != m_isRequired)
requiredStateChanged();
} else
HTMLElement::parseAttribute(name, value);
}
void HTMLFormControlElement::disabledAttributeChanged()
{
disabledStateChanged();
}
void HTMLFormControlElement::disabledStateChanged()
{
setNeedsWillValidateCheck();
invalidateStyleForSubtree();
if (renderer() && renderer()->style().hasAppearance())
renderer()->theme().stateChanged(*renderer(), ControlStates::EnabledState);
}
void HTMLFormControlElement::readOnlyStateChanged()
{
setNeedsWillValidateCheck();
invalidateStyleForSubtree();
}
void HTMLFormControlElement::requiredStateChanged()
{
updateValidity();
// Style recalculation is needed because style selectors may include
// :required and :optional pseudo-classes.
invalidateStyleForSubtree();
}
static bool shouldAutofocus(HTMLFormControlElement* element)
{
if (!element->renderer())
return false;
if (!element->hasAttributeWithoutSynchronization(autofocusAttr))
return false;
if (!element->isConnected() || !element->document().renderView())
return false;
if (element->document().isSandboxed(SandboxAutomaticFeatures)) {
// FIXME: This message should be moved off the console once a solution to https://bugs.webkit.org/show_bug.cgi?id=103274 exists.
element->document().addConsoleMessage(MessageSource::Security, MessageLevel::Error, "Blocked autofocusing on a form control because the form's frame is sandboxed and the 'allow-scripts' permission is not set."_s);
return false;
}
auto& document = element->document();
if (!document.frame()->isMainFrame() && !document.topDocument().securityOrigin().canAccess(document.securityOrigin())) {
document.addConsoleMessage(MessageSource::Security, MessageLevel::Error, "Blocked autofocusing on a form control in a cross-origin subframe."_s);
return false;
}
if (element->hasAutofocused())
return false;
// FIXME: Should this set of hasTagName checks be replaced by a
// virtual member function?
if (is<HTMLInputElement>(*element))
return !downcast<HTMLInputElement>(*element).isInputTypeHidden();
if (element->hasTagName(selectTag))
return true;
if (element->hasTagName(keygenTag))
return true;
if (element->hasTagName(buttonTag))
return true;
if (is<HTMLTextAreaElement>(*element))
return true;
return false;
}
void HTMLFormControlElement::didAttachRenderers()
{
// The call to updateFromElement() needs to go after the call through
// to the base class's attach() because that can sometimes do a close
// on the renderer.
if (renderer())
renderer()->updateFromElement();
if (shouldAutofocus(this)) {
setAutofocused();
RefPtr<HTMLFormControlElement> element = this;
auto frameView = makeRefPtr(document().view());
if (frameView && frameView->layoutContext().isInLayout()) {
frameView->queuePostLayoutCallback([element] {
element->focus();
});
} else {
Style::queuePostResolutionCallback([element] {
element->focus();
});
}
}
}
void HTMLFormControlElement::didMoveToNewDocument(Document& oldDocument, Document& newDocument)
{
FormAssociatedElement::didMoveToNewDocument(oldDocument);
HTMLElement::didMoveToNewDocument(oldDocument, newDocument);
}
static void addInvalidElementToAncestorFromInsertionPoint(const HTMLFormControlElement& element, ContainerNode* insertionPoint)
{
if (!is<Element>(insertionPoint))
return;
for (auto& ancestor : lineageOfType<HTMLFieldSetElement>(downcast<Element>(*insertionPoint)))
ancestor.addInvalidDescendant(element);
}
static void removeInvalidElementToAncestorFromInsertionPoint(const HTMLFormControlElement& element, ContainerNode* insertionPoint)
{
if (!is<Element>(insertionPoint))
return;
for (auto& ancestor : lineageOfType<HTMLFieldSetElement>(downcast<Element>(*insertionPoint)))
ancestor.removeInvalidDescendant(element);
}
Node::InsertedIntoAncestorResult HTMLFormControlElement::insertedIntoAncestor(InsertionType insertionType, ContainerNode& parentOfInsertedTree)
{
if (m_dataListAncestorState == NotInsideDataList)
m_dataListAncestorState = Unknown;
setNeedsWillValidateCheck();
if (willValidate() && !isValidFormControlElement())
addInvalidElementToAncestorFromInsertionPoint(*this, &parentOfInsertedTree);
if (document().hasDisabledFieldsetElement())
setAncestorDisabled(computeIsDisabledByFieldsetAncestor());
HTMLElement::insertedIntoAncestor(insertionType, parentOfInsertedTree);
FormAssociatedElement::insertedIntoAncestor(insertionType, parentOfInsertedTree);
return InsertedIntoAncestorResult::NeedsPostInsertionCallback;
}
void HTMLFormControlElement::didFinishInsertingNode()
{
resetFormOwner();
}
void HTMLFormControlElement::removedFromAncestor(RemovalType removalType, ContainerNode& oldParentOfRemovedTree)
{
bool wasMatchingInvalidPseudoClass = willValidate() && !isValidFormControlElement();
m_validationMessage = nullptr;
if (m_disabledByAncestorFieldset)
setAncestorDisabled(computeIsDisabledByFieldsetAncestor());
bool wasInsideDataList = false;
if (m_dataListAncestorState == InsideDataList) {
m_dataListAncestorState = Unknown;
wasInsideDataList = true;
}
HTMLElement::removedFromAncestor(removalType, oldParentOfRemovedTree);
FormAssociatedElement::removedFromAncestor(removalType, oldParentOfRemovedTree);
if (wasMatchingInvalidPseudoClass)
removeInvalidElementToAncestorFromInsertionPoint(*this, &oldParentOfRemovedTree);
if (wasInsideDataList)
setNeedsWillValidateCheck();
}
void HTMLFormControlElement::setChangedSinceLastFormControlChangeEvent(bool changed)
{
m_wasChangedSinceLastFormControlChangeEvent = changed;
}
void HTMLFormControlElement::dispatchChangeEvent()
{
dispatchScopedEvent(Event::create(eventNames().changeEvent, Event::CanBubble::Yes, Event::IsCancelable::No));
}
void HTMLFormControlElement::dispatchFormControlChangeEvent()
{
dispatchChangeEvent();
setChangedSinceLastFormControlChangeEvent(false);
}
void HTMLFormControlElement::dispatchFormControlInputEvent()
{
setChangedSinceLastFormControlChangeEvent(true);
dispatchInputEvent();
}
bool HTMLFormControlElement::isDisabledFormControl() const
{
return m_disabled || m_disabledByAncestorFieldset;
}
bool HTMLFormControlElement::isRequired() const
{
return m_isRequired;
}
void HTMLFormControlElement::didRecalcStyle(Style::Change)
{
// updateFromElement() can cause the selection to change, and in turn
// trigger synchronous layout, so it must not be called during style recalc.
if (renderer()) {
RefPtr<HTMLFormControlElement> element = this;
Style::queuePostResolutionCallback([element]{
if (auto* renderer = element->renderer())
renderer->updateFromElement();
});
}
}
bool HTMLFormControlElement::supportsFocus() const
{
return !isDisabledFormControl();
}
bool HTMLFormControlElement::isKeyboardFocusable(KeyboardEvent* event) const
{
return isFocusable()
&& document().frame()
&& document().frame()->eventHandler().tabsToAllFormControls(event);
}
bool HTMLFormControlElement::isMouseFocusable() const
{
#if PLATFORM(GTK)
return HTMLElement::isMouseFocusable();
#else
if (needsMouseFocusableQuirk())
return HTMLElement::isMouseFocusable();
return false;
#endif
}
bool HTMLFormControlElement::matchesValidPseudoClass() const
{
return willValidate() && isValidFormControlElement();
}
bool HTMLFormControlElement::matchesInvalidPseudoClass() const
{
return willValidate() && !isValidFormControlElement();
}
bool HTMLFormControlElement::computeWillValidate() const
{
if (m_dataListAncestorState == Unknown) {
#if ENABLE(DATALIST_ELEMENT)
m_dataListAncestorState = ancestorsOfType<HTMLDataListElement>(*this).first()
? InsideDataList : NotInsideDataList;
#else
m_dataListAncestorState = NotInsideDataList;
#endif
}
return m_dataListAncestorState == NotInsideDataList && !isDisabledOrReadOnly();
}
bool HTMLFormControlElement::willValidate() const
{
if (!m_willValidateInitialized || m_dataListAncestorState == Unknown) {
m_willValidateInitialized = true;
bool newWillValidate = computeWillValidate();
if (m_willValidate != newWillValidate)
m_willValidate = newWillValidate;
} else {
// If the following assertion fails, setNeedsWillValidateCheck() is not
// called correctly when something which changes computeWillValidate() result
// is updated.
ASSERT(m_willValidate == computeWillValidate());
}
return m_willValidate;
}
void HTMLFormControlElement::setNeedsWillValidateCheck()
{
// We need to recalculate willValidate immediately because willValidate change can causes style change.
bool newWillValidate = computeWillValidate();
if (m_willValidateInitialized && m_willValidate == newWillValidate)
return;
bool wasValid = m_isValid;
m_willValidateInitialized = true;
m_willValidate = newWillValidate;
updateValidity();
invalidateStyleForSubtree();
if (!m_willValidate && !wasValid) {
removeInvalidElementToAncestorFromInsertionPoint(*this, parentNode());
if (RefPtr<HTMLFormElement> form = this->form())
form->removeInvalidAssociatedFormControlIfNeeded(*this);
}
if (!m_willValidate)
hideVisibleValidationMessage();
}
void HTMLFormControlElement::updateVisibleValidationMessage()
{
Page* page = document().page();
if (!page)
return;
String message;
if (renderer() && willValidate())
message = validationMessage().stripWhiteSpace();
if (!m_validationMessage)
m_validationMessage = makeUnique<ValidationMessage>(this);
m_validationMessage->updateValidationMessage(message);
}
void HTMLFormControlElement::hideVisibleValidationMessage()
{
if (m_validationMessage)
m_validationMessage->requestToHideMessage();
}
bool HTMLFormControlElement::checkValidity(Vector<RefPtr<HTMLFormControlElement>>* unhandledInvalidControls)
{
if (!willValidate() || isValidFormControlElement())
return true;
// An event handler can deref this object.
Ref<HTMLFormControlElement> protectedThis(*this);
Ref<Document> originalDocument(document());
auto event = Event::create(eventNames().invalidEvent, Event::CanBubble::No, Event::IsCancelable::Yes);
dispatchEvent(event);
if (!event->defaultPrevented() && unhandledInvalidControls && isConnected() && originalDocument.ptr() == &document())
unhandledInvalidControls->append(this);
return false;
}
bool HTMLFormControlElement::isShowingValidationMessage() const
{
return m_validationMessage && m_validationMessage->isVisible();
}
bool HTMLFormControlElement::reportValidity()
{
Vector<RefPtr<HTMLFormControlElement>> elements;
if (checkValidity(&elements))
return true;
if (elements.isEmpty())
return false;
// Needs to update layout now because we'd like to call isFocusable(), which
// has !renderer()->needsLayout() assertion.
document().updateLayoutIgnorePendingStylesheets();
if (isConnected() && isFocusable()) {
focusAndShowValidationMessage();
return false;
}
if (document().frame()) {
String message = makeString("An invalid form control with name='", name(), "' is not focusable.");
document().addConsoleMessage(MessageSource::Rendering, MessageLevel::Error, message);
}
return false;
}
void HTMLFormControlElement::focusAndShowValidationMessage()
{
// Calling focus() will scroll the element into view.
focus();
// focus() will scroll the element into view and this scroll may happen asynchronously.
// Because scrolling the view hides the validation message, we need to show the validation
// message asynchronously as well.
callOnMainThread([this, protectedThis = makeRef(*this)] {
updateVisibleValidationMessage();
});
}
inline bool HTMLFormControlElement::isValidFormControlElement() const
{
// If the following assertion fails, updateValidity() is not called
// correctly when something which changes validity is updated.
ASSERT(m_isValid == isValid());
return m_isValid;
}
void HTMLFormControlElement::willChangeForm()
{
if (HTMLFormElement* form = this->form())
form->removeInvalidAssociatedFormControlIfNeeded(*this);
FormAssociatedElement::willChangeForm();
}
void HTMLFormControlElement::didChangeForm()
{
ScriptDisallowedScope::InMainThread scriptDisallowedScope;
FormAssociatedElement::didChangeForm();
if (auto* form = this->form()) {
if (m_willValidateInitialized && m_willValidate && !isValidFormControlElement())
form->registerInvalidAssociatedFormControl(*this);
}
}
void HTMLFormControlElement::updateValidity()
{
bool willValidate = this->willValidate();
bool wasValid = m_isValid;
m_isValid = isValid();
if (willValidate && m_isValid != wasValid) {
// Update style for pseudo classes such as :valid :invalid.
invalidateStyleForSubtree();
if (!m_isValid) {
addInvalidElementToAncestorFromInsertionPoint(*this, parentNode());
if (HTMLFormElement* form = this->form())
form->registerInvalidAssociatedFormControl(*this);
} else {
removeInvalidElementToAncestorFromInsertionPoint(*this, parentNode());
if (HTMLFormElement* form = this->form())
form->removeInvalidAssociatedFormControlIfNeeded(*this);
}
}
// Updates only if this control already has a validtion message.
if (m_validationMessage && m_validationMessage->isVisible()) {
// Calls updateVisibleValidationMessage() even if m_isValid is not
// changed because a validation message can be chagned.
updateVisibleValidationMessage();
}
}
void HTMLFormControlElement::setCustomValidity(const String& error)
{
FormAssociatedElement::setCustomValidity(error);
updateValidity();
}
bool HTMLFormControlElement::validationMessageShadowTreeContains(const Node& node) const
{
return m_validationMessage && m_validationMessage->shadowTreeContains(node);
}
void HTMLFormControlElement::dispatchBlurEvent(RefPtr<Element>&& newFocusedElement)
{
HTMLElement::dispatchBlurEvent(WTFMove(newFocusedElement));
hideVisibleValidationMessage();
}
#if ENABLE(AUTOCORRECT)
// FIXME: We should look to share this code with class HTMLFormElement instead of duplicating the logic.
bool HTMLFormControlElement::shouldAutocorrect() const
{
const AtomString& autocorrectValue = attributeWithoutSynchronization(autocorrectAttr);
if (!autocorrectValue.isEmpty())
return !equalLettersIgnoringASCIICase(autocorrectValue, "off");
if (RefPtr<HTMLFormElement> form = this->form())
return form->shouldAutocorrect();
return true;
}
#endif
#if ENABLE(AUTOCAPITALIZE)
AutocapitalizeType HTMLFormControlElement::autocapitalizeType() const
{
AutocapitalizeType type = HTMLElement::autocapitalizeType();
if (type == AutocapitalizeTypeDefault) {
if (RefPtr<HTMLFormElement> form = this->form())
return form->autocapitalizeType();
}
return type;
}
#endif
String HTMLFormControlElement::autocomplete() const
{
return autofillData().idlExposedValue;
}
void HTMLFormControlElement::setAutocomplete(const String& value)
{
setAttributeWithoutSynchronization(autocompleteAttr, value);
}
AutofillMantle HTMLFormControlElement::autofillMantle() const
{
return is<HTMLInputElement>(*this) && downcast<HTMLInputElement>(this)->isInputTypeHidden() ? AutofillMantle::Anchor : AutofillMantle::Expectation;
}
AutofillData HTMLFormControlElement::autofillData() const
{
// FIXME: We could cache the AutofillData if we we had an efficient way to invalidate the cache when
// the autofill mantle changed (due to a type change on an <input> element) or the element's form
// owner's autocomplete attribute changed or the form owner itself changed.
return AutofillData::createFromHTMLFormControlElement(*this);
}
// FIXME: We should remove the quirk once <rdar://problem/47334655> is fixed.
bool HTMLFormControlElement::needsMouseFocusableQuirk() const
{
return document().quirks().needsFormControlToBeMouseFocusable();
}
} // namespace Webcore