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HTMLElement.cpp
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HTMLElement.cpp
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/*
* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
* (C) 1999 Antti Koivisto (koivisto@kde.org)
* Copyright (C) 2004-2023 Apple Inc. All rights reserved.
* Copyright (C) 2021 Google Inc. All rights reserved.
* Copyright (C) 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
* Copyright (C) 2011 Motorola Mobility. 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 "HTMLElement.h"
#include "CSSMarkup.h"
#include "CSSParser.h"
#include "CSSPropertyNames.h"
#include "CSSValueKeywords.h"
#include "CSSValueList.h"
#include "CSSValuePool.h"
#include "Chrome.h"
#include "ChromeClient.h"
#include "CommonAtomStrings.h"
#include "CustomElementReactionQueue.h"
#include "DOMTokenList.h"
#include "DocumentFragment.h"
#include "ElementAncestorIteratorInlines.h"
#include "ElementChildIteratorInlines.h"
#include "ElementInternals.h"
#include "ElementRareData.h"
#include "EnterKeyHint.h"
#include "Event.h"
#include "EventHandler.h"
#include "EventListener.h"
#include "EventLoop.h"
#include "EventNames.h"
#include "FrameLoader.h"
#include "HTMLBDIElement.h"
#include "HTMLBRElement.h"
#include "HTMLButtonElement.h"
#include "HTMLDialogElement.h"
#include "HTMLDocument.h"
#include "HTMLElementFactory.h"
#include "HTMLFieldSetElement.h"
#include "HTMLFormElement.h"
#include "HTMLInputElement.h"
#include "HTMLMaybeFormAssociatedCustomElement.h"
#include "HTMLMediaElement.h"
#include "HTMLNames.h"
#include "HTMLOptGroupElement.h"
#include "HTMLOptionElement.h"
#include "HTMLParserIdioms.h"
#include "HTMLSelectElement.h"
#include "HTMLTextAreaElement.h"
#include "HTMLTextFormControlElement.h"
#include "ImageOverlay.h"
#include "JSHTMLElement.h"
#include "LabelsNodeList.h"
#include "LocalFrame.h"
#include "LocalFrameView.h"
#include "MediaControlsHost.h"
#include "MutableStyleProperties.h"
#include "NodeName.h"
#include "NodeTraversal.h"
#include "PopoverData.h"
#include "PseudoClassChangeInvalidation.h"
#include "RenderElement.h"
#include "ScriptController.h"
#include "ScriptDisallowedScope.h"
#include "ShadowRoot.h"
#include "SimulatedClick.h"
#include "StyleProperties.h"
#include "Text.h"
#include "ToggleEvent.h"
#include "TypedElementDescendantIteratorInlines.h"
#include "UserAgentStyleSheets.h"
#include "XMLNames.h"
#include "markup.h"
#include <wtf/IsoMallocInlines.h>
#include <wtf/NeverDestroyed.h>
#include <wtf/Range.h>
#include <wtf/StdLibExtras.h>
#include <wtf/text/CString.h>
#include <wtf/text/StringBuilder.h>
#if PLATFORM(IOS_FAMILY)
#include "SelectionGeometry.h"
#endif
namespace WebCore {
WTF_MAKE_ISO_ALLOCATED_IMPL(HTMLElement);
using namespace HTMLNames;
Ref<HTMLElement> HTMLElement::create(const QualifiedName& tagName, Document& document)
{
return adoptRef(*new HTMLElement(tagName, document));
}
String HTMLElement::nodeName() const
{
// FIXME: Would be nice to have an AtomString lookup based off uppercase
// ASCII characters that does not have to copy the string on a hit in the hash.
if (document().isHTMLDocument()) {
if (LIKELY(!tagQName().hasPrefix()))
return tagQName().localNameUppercase();
return Element::nodeName().convertToASCIIUppercase();
}
return Element::nodeName();
}
static inline CSSValueID unicodeBidiAttributeForDirAuto(HTMLElement& element)
{
if (element.hasTagName(preTag) || element.hasTagName(textareaTag))
return CSSValuePlaintext;
// FIXME: For bdo element, dir="auto" should result in "bidi-override isolate" but we don't support having multiple values in unicode-bidi yet.
// See https://bugs.webkit.org/show_bug.cgi?id=73164.
return CSSValueIsolate;
}
unsigned HTMLElement::parseBorderWidthAttribute(const AtomString& value) const
{
if (auto optionalBorderWidth = parseHTMLNonNegativeInteger(value))
return optionalBorderWidth.value();
return hasTagName(tableTag) && !value.isNull() ? 1 : 0;
}
void HTMLElement::applyBorderAttributeToStyle(const AtomString& value, MutableStyleProperties& style)
{
addPropertyToPresentationalHintStyle(style, CSSPropertyBorderWidth, parseBorderWidthAttribute(value), CSSUnitType::CSS_PX);
addPropertyToPresentationalHintStyle(style, CSSPropertyBorderStyle, CSSValueSolid);
}
void HTMLElement::mapLanguageAttributeToLocale(const AtomString& value, MutableStyleProperties& style)
{
if (!value.isEmpty()) {
// Have to quote so the locale id is treated as a string instead of as a CSS keyword.
addPropertyToPresentationalHintStyle(style, CSSPropertyWebkitLocale, serializeString(value));
} else {
// The empty string means the language is explicitly unknown.
addPropertyToPresentationalHintStyle(style, CSSPropertyWebkitLocale, CSSValueAuto);
}
}
bool HTMLElement::hasPresentationalHintsForAttribute(const QualifiedName& name) const
{
switch (name.nodeName()) {
case AttributeNames::alignAttr:
case AttributeNames::contenteditableAttr:
case AttributeNames::hiddenAttr:
case AttributeNames::langAttr:
case AttributeNames::XML::langAttr:
case AttributeNames::draggableAttr:
case AttributeNames::dirAttr:
return true;
default:
break;
}
return StyledElement::hasPresentationalHintsForAttribute(name);
}
enum class ContentEditableType {
Inherit,
True,
False,
PlaintextOnly
};
static inline ContentEditableType contentEditableType(const AtomString& value)
{
if (value.isNull())
return ContentEditableType::Inherit;
if (value.isEmpty() || equalLettersIgnoringASCIICase(value, "true"_s))
return ContentEditableType::True;
if (equalLettersIgnoringASCIICase(value, "false"_s))
return ContentEditableType::False;
if (equalLettersIgnoringASCIICase(value, "plaintext-only"_s))
return ContentEditableType::PlaintextOnly;
return ContentEditableType::Inherit;
}
static ContentEditableType contentEditableType(const HTMLElement& element)
{
return contentEditableType(element.attributeWithoutSynchronization(contenteditableAttr));
}
enum class TextDirectionDirective {
Invalid,
LTR,
RTL,
Auto,
};
static inline TextDirectionDirective parseTextDirection(const AtomString& value)
{
if (equalLettersIgnoringASCIICase(value, "ltr"_s))
return TextDirectionDirective::LTR;
if (equalLettersIgnoringASCIICase(value, "rtl"_s))
return TextDirectionDirective::RTL;
if (equalLettersIgnoringASCIICase(value, "auto"_s))
return TextDirectionDirective::Auto;
return TextDirectionDirective::Invalid;
}
static bool isValidDirValue(const AtomString& value)
{
return parseTextDirection(value) != TextDirectionDirective::Invalid;
}
static bool elementAffectsDirectionality(const HTMLElement& element)
{
return is<HTMLBDIElement>(element) || isValidDirValue(element.attributeWithoutSynchronization(dirAttr));
}
static bool elementAffectsDirectionality(const Node& node)
{
return is<HTMLElement>(node) && elementAffectsDirectionality(downcast<HTMLElement>(node));
}
void HTMLElement::collectPresentationalHintsForAttribute(const QualifiedName& name, const AtomString& value, MutableStyleProperties& style)
{
switch (name.nodeName()) {
case AttributeNames::alignAttr:
if (equalLettersIgnoringASCIICase(value, "middle"_s))
addPropertyToPresentationalHintStyle(style, CSSPropertyTextAlign, CSSValueCenter);
else
addPropertyToPresentationalHintStyle(style, CSSPropertyTextAlign, value);
break;
case AttributeNames::contenteditableAttr: {
CSSValueID userModifyValue = CSSValueReadWrite;
switch (contentEditableType(value)) {
case ContentEditableType::Inherit:
return;
case ContentEditableType::False:
userModifyValue = CSSValueReadOnly;
break;
case ContentEditableType::PlaintextOnly:
userModifyValue = CSSValueReadWritePlaintextOnly;
FALLTHROUGH;
case ContentEditableType::True:
addPropertyToPresentationalHintStyle(style, CSSPropertyOverflowWrap, CSSValueBreakWord);
addPropertyToPresentationalHintStyle(style, CSSPropertyWebkitNbspMode, CSSValueSpace);
addPropertyToPresentationalHintStyle(style, CSSPropertyLineBreak, CSSValueAfterWhiteSpace);
#if PLATFORM(IOS_FAMILY)
addPropertyToPresentationalHintStyle(style, CSSPropertyWebkitTextSizeAdjust, CSSValueNone);
#endif
break;
}
addPropertyToPresentationalHintStyle(style, CSSPropertyWebkitUserModify, userModifyValue);
break;
}
case AttributeNames::hiddenAttr:
addPropertyToPresentationalHintStyle(style, CSSPropertyDisplay, CSSValueNone);
break;
case AttributeNames::draggableAttr:
if (equalLettersIgnoringASCIICase(value, "true"_s))
addPropertyToPresentationalHintStyle(style, CSSPropertyWebkitUserDrag, CSSValueElement);
else if (equalLettersIgnoringASCIICase(value, "false"_s))
addPropertyToPresentationalHintStyle(style, CSSPropertyWebkitUserDrag, CSSValueNone);
break;
case AttributeNames::dirAttr:
if (equalLettersIgnoringASCIICase(value, "auto"_s))
addPropertyToPresentationalHintStyle(style, CSSPropertyUnicodeBidi, unicodeBidiAttributeForDirAuto(*this));
else if (equalLettersIgnoringASCIICase(value, "rtl"_s) || equalLettersIgnoringASCIICase(value, "ltr"_s)) {
addPropertyToPresentationalHintStyle(style, CSSPropertyDirection, value);
if (!hasTagName(bdiTag) && !hasTagName(bdoTag) && !hasTagName(outputTag))
addPropertyToPresentationalHintStyle(style, CSSPropertyUnicodeBidi, CSSValueIsolate);
}
break;
case AttributeNames::XML::langAttr:
mapLanguageAttributeToLocale(value, style);
break;
case AttributeNames::langAttr:
// xml:lang has a higher priority than lang.
if (!hasAttributeWithoutSynchronization(XMLNames::langAttr))
mapLanguageAttributeToLocale(value, style);
break;
default:
StyledElement::collectPresentationalHintsForAttribute(name, value, style);
break;
}
}
const AtomString& HTMLElement::eventNameForEventHandlerAttribute(const QualifiedName& attributeName, const EventHandlerNameMap& map)
{
ASSERT(!attributeName.localName().isNull());
// Event handler attributes have no namespace.
if (!attributeName.namespaceURI().isNull())
return nullAtom();
// Fast early return for names that don't start with "on".
AtomStringImpl& localName = *attributeName.localName().impl();
if (localName.length() < 3 || localName[0] != 'o' || localName[1] != 'n')
return nullAtom();
auto it = map.find(&localName);
return it == map.end() ? nullAtom() : it->value;
}
const AtomString& HTMLElement::eventNameForEventHandlerAttribute(const QualifiedName& attributeName)
{
static NeverDestroyed map = [] {
EventHandlerNameMap map;
JSHTMLElement::forEachEventHandlerContentAttribute([&] (const AtomString& attributeName, const AtomString& eventName) {
// FIXME: Remove this special case. This has an [EventHandler] line in the IDL but was not historically in this map.
if (attributeName == oncuechangeAttr.get().localName())
return;
map.add(attributeName.impl(), eventName);
});
// FIXME: Remove these special cases. These are not in IDL with [EventHandler] but were historically in this map.
static constexpr std::array table {
&onautocompleteAttr,
&onautocompleteerrorAttr,
&onbeforeloadAttr,
&onfocusinAttr,
&onfocusoutAttr,
&ongesturechangeAttr,
&ongestureendAttr,
&ongesturestartAttr,
&onwebkitbeginfullscreenAttr,
&onwebkitcurrentplaybacktargetiswirelesschangedAttr,
&onwebkitendfullscreenAttr,
&onwebkitfullscreenchangeAttr,
&onwebkitfullscreenerrorAttr,
&onwebkitkeyaddedAttr,
&onwebkitkeyerrorAttr,
&onwebkitkeymessageAttr,
&onwebkitneedkeyAttr,
&onwebkitplaybacktargetavailabilitychangedAttr,
&onwebkitpresentationmodechangedAttr,
};
for (auto& entry : table) {
auto* name = entry->get().localName().impl();
map.add(name, AtomString { name, 2, String::MaxLength });
}
return map;
}();
return eventNameForEventHandlerAttribute(attributeName, map);
}
Node::Editability HTMLElement::editabilityFromContentEditableAttr(const Node& node, PageIsEditable pageIsEditable)
{
if (pageIsEditable == PageIsEditable::Yes)
return Editability::CanEditRichly;
if (auto* startElement = is<Element>(node) ? &downcast<Element>(node) : node.parentElement()) {
for (auto& element : lineageOfType<HTMLElement>(*startElement)) {
switch (contentEditableType(element)) {
case ContentEditableType::True:
return Editability::CanEditRichly;
case ContentEditableType::PlaintextOnly:
return Editability::CanEditPlainText;
case ContentEditableType::False:
return Editability::ReadOnly;
case ContentEditableType::Inherit:
break;
}
}
}
RefPtr containingShadowRoot { node.containingShadowRoot() };
if (containingShadowRoot && containingShadowRoot->mode() == ShadowRootMode::UserAgent)
return Editability::ReadOnly;
if (node.document().inDesignMode() && node.isInDocumentTree())
return Editability::CanEditRichly;
return Editability::ReadOnly;
}
bool HTMLElement::matchesReadWritePseudoClass() const
{
return editabilityFromContentEditableAttr(*this, PageIsEditable::No) != Editability::ReadOnly;
}
void HTMLElement::attributeChanged(const QualifiedName& name, const AtomString& oldValue, const AtomString& newValue, AttributeModificationReason attributeModificationReason)
{
StyledElement::attributeChanged(name, oldValue, newValue, attributeModificationReason);
switch (name.nodeName()) {
case AttributeNames::dirAttr:
dirAttributeChanged(newValue);
return;
case AttributeNames::tabindexAttr:
if (auto optionalTabIndex = parseHTMLInteger(newValue))
setTabIndexExplicitly(optionalTabIndex.value());
else
setTabIndexExplicitly(std::nullopt);
return;
case AttributeNames::inertAttr:
if (document().settings().inertAttributeEnabled())
invalidateStyleInternal();
return;
case AttributeNames::inputmodeAttr:
if (auto& document = this->document(); this == document.focusedElement()) {
if (auto* page = document.page())
page->chrome().client().focusedElementDidChangeInputMode(*this, canonicalInputMode());
}
return;
case AttributeNames::popoverAttr:
if (document().settings().popoverAttributeEnabled() && !document().quirks().shouldDisablePopoverAttributeQuirk())
popoverAttributeChanged(newValue);
return;
default:
break;
}
auto& eventName = eventNameForEventHandlerAttribute(name);
if (!eventName.isNull())
setAttributeEventListener(eventName, name, newValue);
}
Node::InsertedIntoAncestorResult HTMLElement::insertedIntoAncestor(InsertionType insertionType, ContainerNode& parentOfInsertedTree)
{
auto result = StyledElement::insertedIntoAncestor(insertionType, parentOfInsertedTree);
hideNonce();
if (RefPtr parent = parentOrShadowHostElement(); parent && parent != document().documentElement() && UNLIKELY(parent->usesEffectiveTextDirection())) {
if (!elementAffectsDirectionality(*this) && !(is<HTMLInputElement>(*this) && downcast<HTMLInputElement>(*this).isTelephoneField())) {
setUsesEffectiveTextDirection(true);
setEffectiveTextDirection(parent->effectiveTextDirection());
}
}
return result;
}
void HTMLElement::removedFromAncestor(RemovalType removalType, ContainerNode& oldParentOfRemovedTree)
{
if (popoverData())
hidePopoverInternal(FocusPreviousElement::No, FireEvents::No);
StyledElement::removedFromAncestor(removalType, oldParentOfRemovedTree);
if (UNLIKELY(usesEffectiveTextDirection()) && !isValidDirValue(attributeWithoutSynchronization(dirAttr))) {
if (auto* parent = parentOrShadowHostElement(); !(parent && parent->usesEffectiveTextDirection()))
setUsesEffectiveTextDirection(false);
}
}
static Ref<DocumentFragment> textToFragment(Document& document, const String& text)
{
auto fragment = DocumentFragment::create(document);
// It's safe to dispatch events on the new fragment since author scripts have no access to it yet.
ScriptDisallowedScope::EventAllowedScope allowedScope(fragment);
for (unsigned start = 0, length = text.length(); start < length; ) {
// Find next line break.
UChar c = 0;
unsigned i;
for (i = start; i < length; i++) {
c = text[i];
if (c == '\r' || c == '\n')
break;
}
// If text is not the empty string, then append a new Text node whose data is text and node document is document to fragment.
if (i > start)
fragment->appendChild(Text::create(document, text.substring(start, i - start)));
if (i == length)
break;
fragment->appendChild(HTMLBRElement::create(document));
// Make sure \r\n doesn't result in two line breaks.
if (c == '\r' && i + 1 < length && text[i + 1] == '\n')
++i;
start = i + 1; // Character after line break.
}
return fragment;
}
// Returns the conforming 'dir' value associated with the state the attribute is in (in its canonical case), if any,
// or the empty string if the attribute is in a state that has no associated keyword value or if the attribute is
// not in a defined state (e.g. the attribute is missing and there is no missing value default).
// http://www.whatwg.org/specs/web-apps/current-work/multipage/common-dom-interfaces.html#limited-to-only-known-values
static inline const AtomString& toValidDirValue(const AtomString& value)
{
static MainThreadNeverDestroyed<const AtomString> ltrValue("ltr"_s);
static MainThreadNeverDestroyed<const AtomString> rtlValue("rtl"_s);
if (equalLettersIgnoringASCIICase(value, "ltr"_s))
return ltrValue;
if (equalLettersIgnoringASCIICase(value, "rtl"_s))
return rtlValue;
if (equalLettersIgnoringASCIICase(value, "auto"_s))
return autoAtom();
return nullAtom();
}
const AtomString& HTMLElement::dir() const
{
return toValidDirValue(attributeWithoutSynchronization(dirAttr));
}
void HTMLElement::setDir(const AtomString& value)
{
setAttributeWithoutSynchronization(dirAttr, value);
}
ExceptionOr<void> HTMLElement::setInnerText(String&& text)
{
// FIXME: This doesn't take whitespace collapsing into account at all.
if (!text.contains([](UChar c) { return c == '\n' || c == '\r'; })) {
stringReplaceAll(WTFMove(text));
return { };
}
if (isConnected() && isTextControlInnerTextElement()) {
if (!text.contains('\r')) {
stringReplaceAll(WTFMove(text));
return { };
}
String textWithConsistentLineBreaks = makeStringBySimplifyingNewLines(text);
stringReplaceAll(WTFMove(textWithConsistentLineBreaks));
return { };
}
// FIXME: This should use replaceAll(), after we fix that to work properly for DocumentFragment.
// Add text nodes and <br> elements.
auto fragment = textToFragment(document(), WTFMove(text));
// It's safe to dispatch events on the new fragment since author scripts have no access to it yet.
ScriptDisallowedScope::EventAllowedScope allowedScope(fragment.get());
return replaceChildrenWithFragment(*this, WTFMove(fragment));
}
ExceptionOr<void> HTMLElement::setOuterText(String&& text)
{
RefPtr<ContainerNode> parent = parentNode();
if (!parent)
return Exception { NoModificationAllowedError };
RefPtr<Node> prev = previousSibling();
RefPtr<Node> next = nextSibling();
RefPtr<Node> newChild;
// Convert text to fragment with <br> tags instead of linebreaks if needed.
if (text.contains([](UChar c) { return c == '\n' || c == '\r'; }))
newChild = textToFragment(document(), WTFMove(text));
else
newChild = Text::create(document(), WTFMove(text));
if (!parentNode())
return Exception { HierarchyRequestError };
auto replaceResult = parent->replaceChild(*newChild, *this);
if (replaceResult.hasException())
return replaceResult.releaseException();
RefPtr<Node> node = next ? next->previousSibling() : nullptr;
if (is<Text>(node)) {
auto result = mergeWithNextTextNode(downcast<Text>(*node));
if (result.hasException())
return result.releaseException();
}
if (is<Text>(prev)) {
auto result = mergeWithNextTextNode(downcast<Text>(*prev));
if (result.hasException())
return result.releaseException();
}
return { };
}
void HTMLElement::applyAspectRatioFromWidthAndHeightAttributesToStyle(StringView widthAttribute, StringView heightAttribute, MutableStyleProperties& style)
{
if (!document().settings().aspectRatioOfImgFromWidthAndHeightEnabled())
return;
auto dimensionWidth = parseHTMLDimension(widthAttribute);
if (!dimensionWidth || dimensionWidth->type != HTMLDimension::Type::Pixel)
return;
auto dimensionHeight = parseHTMLDimension(heightAttribute);
if (!dimensionHeight || dimensionHeight->type != HTMLDimension::Type::Pixel)
return;
addParsedWidthAndHeightToAspectRatioList(dimensionWidth->number, dimensionHeight->number, style);
}
void HTMLElement::applyAspectRatioWithoutDimensionalRulesFromWidthAndHeightAttributesToStyle(StringView widthAttribute, StringView heightAttribute, MutableStyleProperties& style)
{
if (!document().settings().aspectRatioOfImgFromWidthAndHeightEnabled())
return;
auto dimensionWidth = parseHTMLNonNegativeInteger(widthAttribute);
if (!dimensionWidth)
return;
auto dimensionHeight = parseHTMLNonNegativeInteger(heightAttribute);
if (!dimensionHeight)
return;
addParsedWidthAndHeightToAspectRatioList(dimensionWidth.value(), dimensionHeight.value(), style);
}
void HTMLElement::addParsedWidthAndHeightToAspectRatioList(double width, double height, MutableStyleProperties& style)
{
style.setProperty(CSSPropertyAspectRatio, CSSValueList::createSpaceSeparated(CSSPrimitiveValue::create(CSSValueAuto),
CSSValueList::createSlashSeparated(CSSPrimitiveValue::create(width), CSSPrimitiveValue::create(height))));
}
void HTMLElement::applyAlignmentAttributeToStyle(const AtomString& alignment, MutableStyleProperties& style)
{
// Vertical alignment with respect to the current baseline of the text
// right or left means floating images.
CSSValueID floatValue = CSSValueInvalid;
CSSValueID verticalAlignValue = CSSValueInvalid;
if (equalLettersIgnoringASCIICase(alignment, "absmiddle"_s) || equalLettersIgnoringASCIICase(alignment, "abscenter"_s))
verticalAlignValue = CSSValueMiddle;
else if (equalLettersIgnoringASCIICase(alignment, "absbottom"_s))
verticalAlignValue = CSSValueBottom;
else if (equalLettersIgnoringASCIICase(alignment, "left"_s)) {
floatValue = CSSValueLeft;
verticalAlignValue = CSSValueTop;
} else if (equalLettersIgnoringASCIICase(alignment, "right"_s)) {
floatValue = CSSValueRight;
verticalAlignValue = CSSValueTop;
} else if (equalLettersIgnoringASCIICase(alignment, "top"_s))
verticalAlignValue = CSSValueTop;
else if (equalLettersIgnoringASCIICase(alignment, "middle"_s))
verticalAlignValue = CSSValueWebkitBaselineMiddle;
else if (equalLettersIgnoringASCIICase(alignment, "center"_s))
verticalAlignValue = CSSValueMiddle;
else if (equalLettersIgnoringASCIICase(alignment, "bottom"_s))
verticalAlignValue = CSSValueBaseline;
else if (equalLettersIgnoringASCIICase(alignment, "texttop"_s))
verticalAlignValue = CSSValueTextTop;
if (floatValue != CSSValueInvalid)
addPropertyToPresentationalHintStyle(style, CSSPropertyFloat, floatValue);
if (verticalAlignValue != CSSValueInvalid)
addPropertyToPresentationalHintStyle(style, CSSPropertyVerticalAlign, verticalAlignValue);
}
bool HTMLElement::hasCustomFocusLogic() const
{
return false;
}
bool HTMLElement::supportsFocus() const
{
return Element::supportsFocus() || (hasEditableStyle() && parentNode() && !parentNode()->hasEditableStyle());
}
String HTMLElement::contentEditable() const
{
switch (contentEditableType(*this)) {
case ContentEditableType::Inherit:
return "inherit"_s;
case ContentEditableType::True:
return trueAtom();
case ContentEditableType::False:
return falseAtom();
case ContentEditableType::PlaintextOnly:
return plaintextOnlyAtom();
}
return "inherit"_s;
}
ExceptionOr<void> HTMLElement::setContentEditable(const String& enabled)
{
if (equalLettersIgnoringASCIICase(enabled, "true"_s))
setAttributeWithoutSynchronization(contenteditableAttr, trueAtom());
else if (equalLettersIgnoringASCIICase(enabled, "false"_s))
setAttributeWithoutSynchronization(contenteditableAttr, falseAtom());
else if (equalLettersIgnoringASCIICase(enabled, "plaintext-only"_s))
setAttributeWithoutSynchronization(contenteditableAttr, plaintextOnlyAtom());
else if (equalLettersIgnoringASCIICase(enabled, "inherit"_s))
removeAttribute(contenteditableAttr);
else
return Exception { SyntaxError };
return { };
}
bool HTMLElement::draggable() const
{
auto& value = attributeWithoutSynchronization(draggableAttr);
if (isDraggableIgnoringAttributes())
return !equalLettersIgnoringASCIICase(value, "false"_s);
return equalLettersIgnoringASCIICase(value, "true"_s);
}
void HTMLElement::setDraggable(bool value)
{
setAttributeWithoutSynchronization(draggableAttr, value ? trueAtom() : falseAtom());
}
bool HTMLElement::spellcheck() const
{
return isSpellCheckingEnabled();
}
void HTMLElement::setSpellcheck(bool enable)
{
setAttributeWithoutSynchronization(spellcheckAttr, enable ? trueAtom() : falseAtom());
}
void HTMLElement::click()
{
simulateClick(*this, nullptr, SendNoEvents, DoNotShowPressedLook, SimulatedClickSource::Bindings);
}
bool HTMLElement::accessKeyAction(bool sendMouseEvents)
{
if (isFocusable())
focus();
return dispatchSimulatedClick(nullptr, sendMouseEvents ? SendMouseUpDownEvents : SendNoEvents);
}
String HTMLElement::accessKeyLabel() const
{
const auto& accessKey = attributeWithoutSynchronization(accesskeyAttr);
if (accessKey.isEmpty())
return String();
StringBuilder result;
#if PLATFORM(COCOA)
auto modifiers = EventHandler::accessKeyModifiers();
if (modifiers.contains(PlatformEvent::Modifier::ControlKey))
result.append(upArrowhead);
if (modifiers.contains(PlatformEvent::Modifier::AltKey))
result.append(WTF::Unicode::optionKey);
#else
// Currently accessKeyModifier in non-cocoa platforms is hardcoded to Alt, so no reason to do extra work here.
// If this ever becomes configurable, make this code use EventHandler::accessKeyModifiers().
result.append("Alt+");
#endif
result.append(accessKey);
return result.toString();
}
String HTMLElement::title() const
{
return attributeWithoutSynchronization(titleAttr);
}
bool HTMLElement::translate() const
{
for (auto& element : lineageOfType<HTMLElement>(*this)) {
const AtomString& value = element.attributeWithoutSynchronization(translateAttr);
if (equalLettersIgnoringASCIICase(value, "yes"_s) || (value.isEmpty() && !value.isNull()))
return true;
if (equalLettersIgnoringASCIICase(value, "no"_s))
return false;
}
// Default on the root element is translate=yes.
return true;
}
void HTMLElement::setTranslate(bool enable)
{
setAttributeWithoutSynchronization(translateAttr, enable ? "yes"_s : "no"_s);
}
bool HTMLElement::rendererIsEverNeeded()
{
if (hasTagName(noscriptTag)) {
RefPtr frame { document().frame() };
if (frame && frame->script().canExecuteScripts(ReasonForCallingCanExecuteScripts::NotAboutToExecuteScript))
return false;
} else if (hasTagName(noembedTag)) {
RefPtr frame { document().frame() };
if (frame && frame->arePluginsEnabled())
return false;
}
return StyledElement::rendererIsEverNeeded();
}
FormAssociatedElement* HTMLElement::asFormAssociatedElement()
{
return nullptr;
}
static void setHasDirAutoFlagRecursively(Node* firstNode, bool flag, Node* lastNode = nullptr)
{
firstNode->setSelfOrPrecedingNodesAffectDirAuto(flag);
RefPtr<Node> node = firstNode->firstChild();
while (node) {
if (elementAffectsDirectionality(*node)) {
if (node == lastNode)
return;
node = NodeTraversal::nextSkippingChildren(*node, firstNode);
continue;
}
node->setSelfOrPrecedingNodesAffectDirAuto(flag);
if (node == lastNode)
return;
node = NodeTraversal::next(*node, firstNode);
}
}
void HTMLElement::childrenChanged(const ChildChange& change)
{
StyledElement::childrenChanged(change);
if (UNLIKELY(document().isDirAttributeDirty()))
adjustDirectionalityIfNeededAfterChildrenChanged(change.previousSiblingElement, change.type);
}
bool HTMLElement::hasDirectionAuto() const
{
const AtomString& direction = attributeWithoutSynchronization(dirAttr);
return (hasTagName(bdiTag) && !isValidDirValue(direction)) || equalLettersIgnoringASCIICase(direction, "auto"_s);
}
std::optional<TextDirection> HTMLElement::directionalityIfDirIsAuto() const
{
if (!(selfOrPrecedingNodesAffectDirAuto() && hasDirectionAuto()))
return std::nullopt;
return computeDirectionalityFromText().direction;
}
auto HTMLElement::computeDirectionalityFromText() const -> TextDirectionWithStrongDirectionalityNode
{
if (auto* textControl = dynamicDowncast<HTMLTextFormControlElement>(const_cast<HTMLElement*>(this))) {
auto* inputElement = dynamicDowncast<HTMLInputElement>(textControl);
if (!inputElement || (inputElement->isTextType() && !inputElement->isPasswordField())) {
auto direction = textControl->value().defaultWritingDirection();
if (!direction)
return { TextDirection::LTR, nullptr };
return { *direction == U_LEFT_TO_RIGHT ? TextDirection::LTR : TextDirection::RTL, textControl };
}
}
RefPtr<Node> node = firstChild();
while (node) {
// Skip bdi, script, style and text form controls.
if (node->hasTagName(bdiTag) || node->hasTagName(scriptTag) || node->hasTagName(styleTag)
|| (is<Element>(*node) && downcast<Element>(*node).isTextField())) {
node = NodeTraversal::nextSkippingChildren(*node, this);
continue;
}
// Skip elements with valid dir attribute
if (is<Element>(*node)) {
if (isValidDirValue(downcast<Element>(*node).attributeWithoutSynchronization(dirAttr))) {
node = NodeTraversal::nextSkippingChildren(*node, this);
continue;
}
}
if (node->isTextNode()) {
if (auto direction = node->textContent(true).defaultWritingDirection())
return { *direction == U_LEFT_TO_RIGHT ? TextDirection::LTR : TextDirection::RTL, node };
}
node = NodeTraversal::next(*node, this);
}
return { TextDirection::LTR, nullptr };
}
void HTMLElement::dirAttributeChanged(const AtomString& value)
{
RefPtr<Element> parent = parentOrShadowHostElement();
bool isValid = true;
document().setIsDirAttributeDirty();
auto direction = parseTextDirection(value);
switch (direction) {
case TextDirectionDirective::Invalid:
isValid = false;
if (selfOrPrecedingNodesAffectDirAuto() && (!parent || !parent->selfOrPrecedingNodesAffectDirAuto()) && !is<HTMLBDIElement>(*this))
setHasDirAutoFlagRecursively(this, false);
if (parent && parent->usesEffectiveTextDirection() && !(is<HTMLInputElement>(*this) && downcast<HTMLInputElement>(*this).isTelephoneField()))
updateEffectiveDirectionality(parent->effectiveTextDirection());
else
updateEffectiveDirectionality(std::nullopt);
break;
case TextDirectionDirective::LTR:
if (selfOrPrecedingNodesAffectDirAuto())
setHasDirAutoFlagRecursively(this, false);
updateEffectiveDirectionality(TextDirection::LTR);
break;
case TextDirectionDirective::RTL:
if (selfOrPrecedingNodesAffectDirAuto())
setHasDirAutoFlagRecursively(this, false);
updateEffectiveDirectionality(TextDirection::RTL);
break;
case TextDirectionDirective::Auto:
setUsesEffectiveTextDirection(true);
updateEffectiveDirectionalityOfDirAuto();
break;
}
if (is<HTMLElement>(parent) && parent->selfOrPrecedingNodesAffectDirAuto()) {
if (isValid && direction != TextDirectionDirective::Auto)
setHasDirAutoFlagRecursively(this, false);
downcast<HTMLElement>(*parent).adjustDirectionalityIfNeededAfterChildAttributeChanged(this);
}
}
void HTMLElement::updateEffectiveDirectionality(std::optional<TextDirection> direction)
{
Style::PseudoClassChangeInvalidation styleInvalidation(*this, CSSSelector::PseudoClassDir, Style::PseudoClassChangeInvalidation::AnyValue);
auto effectiveDirection = direction.value_or(TextDirection::LTR);
setUsesEffectiveTextDirection(!!direction);
if (direction)
setEffectiveTextDirection(effectiveDirection);
auto updateEffectiveTextDirectionOfShadowRoot = [&](HTMLElement& element) {
if (RefPtr shadowRootOfElement = element.shadowRoot()) {
for (auto& element : childrenOfType<HTMLElement>(*shadowRootOfElement))
element.updateEffectiveDirectionality(direction);
}
};
updateEffectiveTextDirectionOfShadowRoot(*this);
for (auto it = descendantsOfType<HTMLElement>(*this).begin(); it;) {
auto& element = *it;
if (isValidDirValue(element.attributeWithoutSynchronization(dirAttr))) {
it.traverseNextSkippingChildren();
continue;
}
updateEffectiveTextDirectionOfShadowRoot(element);
Style::PseudoClassChangeInvalidation styleInvalidation(element, CSSSelector::PseudoClassDir, Style::PseudoClassChangeInvalidation::AnyValue);
element.setUsesEffectiveTextDirection(!!direction);
if (direction)
element.setEffectiveTextDirection(effectiveDirection);
it.traverseNext();
}
}
void HTMLElement::adjustDirectionalityIfNeededAfterChildAttributeChanged(Element*)
{
ASSERT(selfOrPrecedingNodesAffectDirAuto());
for (auto& element : lineageOfType<HTMLElement>(*this)) {
if (elementAffectsDirectionality(element)) {
ASSERT(element.hasDirectionAuto());
element.updateEffectiveDirectionalityOfDirAuto();
break;
}
}
}
void HTMLElement::updateEffectiveDirectionalityOfDirAuto()
{
auto result = computeDirectionalityFromText();
setHasDirAutoFlagRecursively(this, true, result.strongDirectionalityNode.get());
updateEffectiveDirectionality(result.direction);
if (renderer() && renderer()->style().direction() != result.direction)
invalidateStyleForSubtree();
}
void HTMLElement::adjustDirectionalityIfNeededAfterChildrenChanged(Element* beforeChange, ChildChange::Type changeType)
{
// FIXME: This function looks suspicious.
if (!selfOrPrecedingNodesAffectDirAuto())
return;
RefPtr<Node> oldMarkedNode;
if (beforeChange)
oldMarkedNode = changeType == ChildChange::Type::ElementInserted ? ElementTraversal::nextSibling(*beforeChange) : beforeChange->nextSibling();
while (oldMarkedNode && elementAffectsDirectionality(*oldMarkedNode))
oldMarkedNode = oldMarkedNode->nextSibling();
if (oldMarkedNode)
setHasDirAutoFlagRecursively(oldMarkedNode.get(), false);
for (auto& elementToAdjust : lineageOfType<HTMLElement>(*this)) {
if (elementAffectsDirectionality(elementToAdjust)) {
ASSERT(elementToAdjust.hasDirectionAuto());
elementToAdjust.updateEffectiveDirectionalityOfDirAuto();
return;
}
}
}
void HTMLElement::addHTMLLengthToStyle(MutableStyleProperties& style, CSSPropertyID propertyID, StringView value, AllowPercentage allowPercentage, UseCSSPXAsUnitType useCSSPX, IsMultiLength isMultiLength, AllowZeroValue allowZeroValue)
{
auto dimensionValue = isMultiLength == IsMultiLength::No ? parseHTMLDimension(value) : parseHTMLMultiLength(value);
if (!dimensionValue || (!dimensionValue->number && allowZeroValue == AllowZeroValue::No))
return;
if (dimensionValue->type == HTMLDimension::Type::Percentage) {
if (allowPercentage == AllowPercentage::Yes)
addPropertyToPresentationalHintStyle(style, propertyID, dimensionValue->number, CSSUnitType::CSS_PERCENTAGE);
return;