202 lines
6.6 KiB
C++
202 lines
6.6 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) 2004-2019 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 "HTMLLabelElement.h"
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#include "Document.h"
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#include "ElementIterator.h"
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#include "Event.h"
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#include "EventNames.h"
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#include "FormAssociatedElement.h"
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#include "HTMLFormControlElement.h"
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#include "HTMLNames.h"
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#include "SelectionRestorationMode.h"
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#include <wtf/IsoMallocInlines.h>
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namespace WebCore {
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WTF_MAKE_ISO_ALLOCATED_IMPL(HTMLLabelElement);
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using namespace HTMLNames;
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static LabelableElement* firstElementWithIdIfLabelable(TreeScope& treeScope, const AtomString& id)
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{
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auto element = makeRefPtr(treeScope.getElementById(id));
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if (!is<LabelableElement>(element))
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return nullptr;
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auto& labelableElement = downcast<LabelableElement>(*element);
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return labelableElement.supportLabels() ? &labelableElement : nullptr;
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}
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inline HTMLLabelElement::HTMLLabelElement(const QualifiedName& tagName, Document& document)
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: HTMLElement(tagName, document)
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{
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ASSERT(hasTagName(labelTag));
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}
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Ref<HTMLLabelElement> HTMLLabelElement::create(const QualifiedName& tagName, Document& document)
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{
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return adoptRef(*new HTMLLabelElement(tagName, document));
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}
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RefPtr<LabelableElement> HTMLLabelElement::control() const
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{
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auto& controlId = attributeWithoutSynchronization(forAttr);
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if (controlId.isNull()) {
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// Search the children and descendants of the label element for a form element.
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// per http://dev.w3.org/html5/spec/Overview.html#the-label-element
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// the form element must be "labelable form-associated element".
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for (auto& labelableElement : descendantsOfType<LabelableElement>(*this)) {
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if (labelableElement.supportLabels())
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return const_cast<LabelableElement*>(&labelableElement);
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}
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return nullptr;
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}
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return isConnected() ? firstElementWithIdIfLabelable(treeScope(), controlId) : nullptr;
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}
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HTMLFormElement* HTMLLabelElement::form() const
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{
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auto control = this->control();
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if (!is<HTMLFormControlElement>(control))
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return nullptr;
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return downcast<HTMLFormControlElement>(control.get())->form();
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}
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void HTMLLabelElement::setActive(bool down, bool pause, Style::InvalidationScope invalidationScope)
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{
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if (down == active())
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return;
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// Update our status first.
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HTMLElement::setActive(down, pause, invalidationScope);
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// Also update our corresponding control.
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if (auto element = control())
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element->setActive(down, pause);
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}
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void HTMLLabelElement::setHovered(bool over, Style::InvalidationScope invalidationScope)
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{
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if (over == hovered())
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return;
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// Update our status first.
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HTMLElement::setHovered(over, invalidationScope);
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// Also update our corresponding control.
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if (auto element = control())
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element->setHovered(over);
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}
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bool HTMLLabelElement::isEventTargetedAtInteractiveDescendants(Event& event) const
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{
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if (!is<Node>(event.target()))
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return false;
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auto& node = downcast<Node>(*event.target());
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if (!containsIncludingShadowDOM(&node))
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return false;
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for (const auto* it = &node; it && it != this; it = it->parentElementInComposedTree()) {
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if (is<HTMLElement>(it) && downcast<HTMLElement>(*it).isInteractiveContent())
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return true;
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}
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return false;
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}
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void HTMLLabelElement::defaultEventHandler(Event& event)
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{
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static bool processingClick = false;
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if (event.type() == eventNames().clickEvent && !processingClick) {
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auto control = this->control();
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// If we can't find a control or if the control received the click
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// event, then there's no need for us to do anything.
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if (!control || (is<Node>(event.target()) && control->containsIncludingShadowDOM(&downcast<Node>(*event.target())))) {
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HTMLElement::defaultEventHandler(event);
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return;
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}
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// The activation behavior of a label element for events targeted at interactive
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// content descendants of a label element, and any descendants of those interactive
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// content descendants, must be to do nothing.
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// https://html.spec.whatwg.org/#the-label-element
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if (isEventTargetedAtInteractiveDescendants(event)) {
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HTMLElement::defaultEventHandler(event);
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return;
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}
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processingClick = true;
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control->dispatchSimulatedClick(&event);
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document().updateLayoutIgnorePendingStylesheets();
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if (control->isMouseFocusable())
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control->focus();
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processingClick = false;
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event.setDefaultHandled();
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}
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HTMLElement::defaultEventHandler(event);
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}
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bool HTMLLabelElement::willRespondToMouseClickEvents()
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{
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auto element = control();
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return (element && element->willRespondToMouseClickEvents()) || HTMLElement::willRespondToMouseClickEvents();
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}
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void HTMLLabelElement::focus(const FocusOptions& options)
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{
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Ref<HTMLLabelElement> protectedThis(*this);
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if (document().haveStylesheetsLoaded()) {
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document().updateLayout();
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if (isFocusable()) {
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// The value of restorationMode is not used for label elements as it doesn't override updateFocusAppearance.
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Element::focus(options);
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return;
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}
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}
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// To match other browsers, always restore previous selection.
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if (auto element = control())
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element->focus({ SelectionRestorationMode::RestoreOrSelectAll, options.direction });
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}
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bool HTMLLabelElement::accessKeyAction(bool sendMouseEvents)
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{
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if (auto element = control())
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return element->accessKeyAction(sendMouseEvents);
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return HTMLElement::accessKeyAction(sendMouseEvents);
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}
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} // namespace
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