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HTMLOptionElement.cpp
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HTMLOptionElement.cpp
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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)
* (C) 2006 Alexey Proskuryakov (ap@nypop.com)
* Copyright (C) 2004-2020 Apple Inc. All rights reserved.
* Copyright (C) 2010 Google Inc. All rights reserved.
* Copyright (C) 2011 Motorola Mobility, 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 "HTMLOptionElement.h"
#include "AXObjectCache.h"
#include "Document.h"
#include "DocumentInlines.h"
#include "ElementAncestorIteratorInlines.h"
#include "HTMLDataListElement.h"
#include "HTMLNames.h"
#include "HTMLOptGroupElement.h"
#include "HTMLParserIdioms.h"
#include "HTMLSelectElement.h"
#include "NodeName.h"
#include "NodeRenderStyle.h"
#include "NodeTraversal.h"
#include "PseudoClassChangeInvalidation.h"
#include "RenderMenuList.h"
#include "RenderTheme.h"
#include "ScriptElement.h"
#include "StyleResolver.h"
#include "Text.h"
#include <wtf/IsoMallocInlines.h>
#include <wtf/Ref.h>
namespace WebCore {
WTF_MAKE_ISO_ALLOCATED_IMPL(HTMLOptionElement);
using namespace HTMLNames;
HTMLOptionElement::HTMLOptionElement(const QualifiedName& tagName, Document& document)
: HTMLElement(tagName, document, CreateHTMLOptionElement)
{
ASSERT(hasTagName(optionTag));
}
Ref<HTMLOptionElement> HTMLOptionElement::create(Document& document)
{
return adoptRef(*new HTMLOptionElement(optionTag, document));
}
Ref<HTMLOptionElement> HTMLOptionElement::create(const QualifiedName& tagName, Document& document)
{
return adoptRef(*new HTMLOptionElement(tagName, document));
}
ExceptionOr<Ref<HTMLOptionElement>> HTMLOptionElement::createForLegacyFactoryFunction(Document& document, String&& text, const AtomString& value, bool defaultSelected, bool selected)
{
auto element = create(document);
if (!text.isEmpty()) {
auto appendResult = element->appendChild(Text::create(document, WTFMove(text)));
if (appendResult.hasException())
return appendResult.releaseException();
}
if (!value.isNull())
element->setValue(value);
if (defaultSelected)
element->setAttributeWithoutSynchronization(selectedAttr, emptyAtom());
element->setSelected(selected);
return element;
}
bool HTMLOptionElement::isFocusable() const
{
if (!supportsFocus())
return false;
// Option elements do not have a renderer.
auto* style = const_cast<HTMLOptionElement&>(*this).computedStyle();
return style && style->display() != DisplayType::None;
}
bool HTMLOptionElement::matchesDefaultPseudoClass() const
{
return m_isDefault;
}
String HTMLOptionElement::text() const
{
String text = collectOptionInnerText();
// FIXME: Is displayStringModifiedByEncoding helpful here?
// If it's correct here, then isn't it needed in the value and label functions too?
return stripLeadingAndTrailingHTMLSpaces(document().displayStringModifiedByEncoding(text)).simplifyWhiteSpace(isHTMLSpace);
}
void HTMLOptionElement::setText(String&& text)
{
Ref protectedThis { *this };
// Changing the text causes a recalc of a select's items, which will reset the selected
// index to the first item if the select is single selection with a menu list. We attempt to
// preserve the selected item.
RefPtr select = ownerSelectElement();
bool selectIsMenuList = select && select->usesMenuList();
int oldSelectedIndex = selectIsMenuList ? select->selectedIndex() : -1;
// Handle the common special case where there's exactly 1 child node, and it's a text node.
RefPtr child = firstChild();
if (is<Text>(child) && !child->nextSibling())
downcast<Text>(*child).setData(WTFMove(text));
else {
removeChildren();
appendChild(Text::create(document(), WTFMove(text)));
}
if (selectIsMenuList && select->selectedIndex() != oldSelectedIndex)
select->setSelectedIndex(oldSelectedIndex);
}
bool HTMLOptionElement::accessKeyAction(bool)
{
RefPtr select = ownerSelectElement();
if (select) {
select->accessKeySetSelectedIndex(index());
return true;
}
return false;
}
HTMLFormElement* HTMLOptionElement::form() const
{
if (RefPtr selectElement = ownerSelectElement())
return selectElement->form();
return nullptr;
}
int HTMLOptionElement::index() const
{
// It would be faster to cache the index, but harder to get it right in all cases.
RefPtr selectElement = ownerSelectElement();
if (!selectElement)
return 0;
int optionIndex = 0;
for (auto& item : selectElement->listItems()) {
if (!is<HTMLOptionElement>(*item))
continue;
if (item == this)
return optionIndex;
++optionIndex;
}
return 0;
}
void HTMLOptionElement::attributeChanged(const QualifiedName& name, const AtomString& oldValue, const AtomString& newValue, AttributeModificationReason attributeModificationReason)
{
switch (name.nodeName()) {
case AttributeNames::disabledAttr: {
bool newDisabled = !newValue.isNull();
if (m_disabled != newDisabled) {
Style::PseudoClassChangeInvalidation disabledInvalidation(*this, { { CSSSelector::PseudoClassDisabled, newDisabled }, { CSSSelector::PseudoClassEnabled, !newDisabled } });
m_disabled = newDisabled;
if (renderer() && renderer()->style().hasEffectiveAppearance())
renderer()->theme().stateChanged(*renderer(), ControlStates::States::Enabled);
}
break;
}
case AttributeNames::selectedAttr: {
// FIXME: Use PseudoClassChangeInvalidation in other elements that implement matchesDefaultPseudoClass().
Style::PseudoClassChangeInvalidation defaultInvalidation(*this, CSSSelector::PseudoClassDefault, !newValue.isNull());
m_isDefault = !newValue.isNull();
// FIXME: This doesn't match what the HTML specification says.
// The specification implies that removing the selected attribute or
// changing the value of a selected attribute that is already present
// has no effect on whether the element is selected.
setSelectedState(!newValue.isNull());
break;
}
#if ENABLE(DATALIST_ELEMENT)
case AttributeNames::valueAttr:
for (auto& dataList : ancestorsOfType<HTMLDataListElement>(*this))
dataList.optionElementChildrenChanged();
break;
#endif
default:
HTMLElement::attributeChanged(name, oldValue, newValue, attributeModificationReason);
break;
}
}
String HTMLOptionElement::value() const
{
const AtomString& value = attributeWithoutSynchronization(valueAttr);
if (!value.isNull())
return value;
return stripLeadingAndTrailingHTMLSpaces(collectOptionInnerText()).simplifyWhiteSpace(isHTMLSpace);
}
void HTMLOptionElement::setValue(const AtomString& value)
{
setAttributeWithoutSynchronization(valueAttr, value);
}
bool HTMLOptionElement::selected(AllowStyleInvalidation allowStyleInvalidation) const
{
if (RefPtr select = ownerSelectElement())
select->updateListItemSelectedStates(allowStyleInvalidation);
return m_isSelected;
}
void HTMLOptionElement::setSelected(bool selected)
{
if (m_isSelected == selected)
return;
setSelectedState(selected);
if (RefPtr select = ownerSelectElement())
select->optionSelectionStateChanged(*this, selected);
}
void HTMLOptionElement::setSelectedState(bool selected, AllowStyleInvalidation allowStyleInvalidation)
{
if (m_isSelected == selected)
return;
std::optional<Style::PseudoClassChangeInvalidation> checkedInvalidation;
if (allowStyleInvalidation == AllowStyleInvalidation::Yes)
emplace(checkedInvalidation, *this, { { CSSSelector::PseudoClassChecked, selected } });
m_isSelected = selected;
if (auto* cache = document().existingAXObjectCache())
cache->onSelectedChanged(this);
}
void HTMLOptionElement::childrenChanged(const ChildChange& change)
{
#if ENABLE(DATALIST_ELEMENT)
Vector<Ref<HTMLDataListElement>> ancestors;
for (auto& dataList : ancestorsOfType<HTMLDataListElement>(*this))
ancestors.append(dataList);
for (auto& dataList : ancestors)
dataList->optionElementChildrenChanged();
#endif
if (RefPtr select = ownerSelectElement())
select->optionElementChildrenChanged();
HTMLElement::childrenChanged(change);
}
HTMLSelectElement* HTMLOptionElement::ownerSelectElement() const
{
if (auto* parent = parentElement()) {
if (is<HTMLSelectElement>(*parent))
return downcast<HTMLSelectElement>(parent);
if (is<HTMLOptGroupElement>(*parent))
return downcast<HTMLOptGroupElement>(*parent).ownerSelectElement();
}
return nullptr;
}
String HTMLOptionElement::label() const
{
String label = attributeWithoutSynchronization(labelAttr);
if (!label.isNull())
return stripLeadingAndTrailingHTMLSpaces(label);
return stripLeadingAndTrailingHTMLSpaces(collectOptionInnerText()).simplifyWhiteSpace(isHTMLSpace);
}
// Same as label() but ignores the label content attribute in quirks mode for compatibility with other browsers.
String HTMLOptionElement::displayLabel() const
{
if (document().inQuirksMode())
return stripLeadingAndTrailingHTMLSpaces(collectOptionInnerText()).simplifyWhiteSpace(isHTMLSpace);
return label();
}
void HTMLOptionElement::setLabel(const AtomString& label)
{
setAttributeWithoutSynchronization(labelAttr, label);
}
void HTMLOptionElement::willResetComputedStyle()
{
// FIXME: This is nasty, we ask our owner select to repaint even if the new
// style is exactly the same.
if (auto select = ownerSelectElement()) {
if (auto renderer = select->renderer())
renderer->repaint();
}
}
String HTMLOptionElement::textIndentedToRespectGroupLabel() const
{
RefPtr parent = parentNode();
if (is<HTMLOptGroupElement>(parent))
return " " + displayLabel();
return displayLabel();
}
bool HTMLOptionElement::isDisabledFormControl() const
{
if (ownElementDisabled())
return true;
if (!is<HTMLOptGroupElement>(parentNode()))
return false;
return downcast<HTMLOptGroupElement>(*parentNode()).isDisabledFormControl();
}
String HTMLOptionElement::collectOptionInnerText() const
{
StringBuilder text;
for (RefPtr node = firstChild(); node; ) {
if (is<Text>(*node))
text.append(node->nodeValue());
// Text nodes inside script elements are not part of the option text.
if (is<Element>(*node) && isScriptElement(downcast<Element>(*node)))
node = NodeTraversal::nextSkippingChildren(*node, this);
else
node = NodeTraversal::next(*node, this);
}
return text.toString();
}
} // namespace