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/*
* Copyright (C) 2010, 2011 Nokia Corporation and/or its subsidiary(-ies)
* Copyright (C) 2018 Apple 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 "HTMLDetailsElement.h"
#include "AXObjectCache.h"
#include "DocumentInlines.h"
#include "ElementChildIteratorInlines.h"
#include "ElementRareData.h"
#include "EventLoop.h"
#include "EventNames.h"
#include "HTMLSlotElement.h"
#include "HTMLSummaryElement.h"
#include "LocalizedStrings.h"
#include "MouseEvent.h"
#include "RenderBlockFlow.h"
#include "ShadowRoot.h"
#include "SlotAssignment.h"
#include "Text.h"
#include <wtf/IsoMallocInlines.h>
#include <wtf/NeverDestroyed.h>
namespace WebCore {
WTF_MAKE_ISO_ALLOCATED_IMPL(HTMLDetailsElement);
using namespace HTMLNames;
static const AtomString& summarySlotName()
{
static MainThreadNeverDestroyed<const AtomString> summarySlot("summarySlot"_s);
return summarySlot;
}
class DetailsSlotAssignment final : public NamedSlotAssignment {
private:
void hostChildElementDidChange(const Element&, ShadowRoot&) override;
const AtomString& slotNameForHostChild(const Node&) const override;
};
void DetailsSlotAssignment::hostChildElementDidChange(const Element& childElement, ShadowRoot& shadowRoot)
{
if (is<HTMLSummaryElement>(childElement)) {
// Don't check whether this is the first summary element
// since we don't know the answer when this function is called inside Element::removedFrom.
didChangeSlot(summarySlotName(), shadowRoot);
} else
didChangeSlot(NamedSlotAssignment::defaultSlotName(), shadowRoot);
}
const AtomString& DetailsSlotAssignment::slotNameForHostChild(const Node& child) const
{
auto& parent = *child.parentNode();
ASSERT(is<HTMLDetailsElement>(parent));
auto& details = downcast<HTMLDetailsElement>(parent);
// The first summary child gets assigned to the summary slot.
if (is<HTMLSummaryElement>(child)) {
if (&child == childrenOfType<HTMLSummaryElement>(details).first())
return summarySlotName();
}
return NamedSlotAssignment::defaultSlotName();
}
Ref<HTMLDetailsElement> HTMLDetailsElement::create(const QualifiedName& tagName, Document& document)
{
auto details = adoptRef(*new HTMLDetailsElement(tagName, document));
details->addShadowRoot(ShadowRoot::create(document, makeUnique<DetailsSlotAssignment>()));
return details;
}
HTMLDetailsElement::HTMLDetailsElement(const QualifiedName& tagName, Document& document)
: HTMLElement(tagName, document)
{
ASSERT(hasTagName(detailsTag));
}
RenderPtr<RenderElement> HTMLDetailsElement::createElementRenderer(RenderStyle&& style, const RenderTreePosition&)
{
return createRenderer<RenderBlockFlow>(*this, WTFMove(style));
}
void HTMLDetailsElement::didAddUserAgentShadowRoot(ShadowRoot& root)
{
auto summarySlot = HTMLSlotElement::create(slotTag, document());
summarySlot->setAttributeWithoutSynchronization(nameAttr, summarySlotName());
m_summarySlot = summarySlot.get();
auto defaultSummary = HTMLSummaryElement::create(summaryTag, document());
defaultSummary->appendChild(Text::create(document(), defaultDetailsSummaryText()));
m_defaultSummary = defaultSummary.get();
summarySlot->appendChild(defaultSummary);
root.appendChild(summarySlot);
m_defaultSlot = HTMLSlotElement::create(slotTag, document());
ASSERT(!m_isOpen);
}
bool HTMLDetailsElement::isActiveSummary(const HTMLSummaryElement& summary) const
{
if (!m_summarySlot->assignedNodes())
return &summary == m_defaultSummary;
if (summary.parentNode() != this)
return false;
RefPtr slot = shadowRoot()->findAssignedSlot(summary);
if (!slot)
return false;
return slot == m_summarySlot.get();
}
void HTMLDetailsElement::attributeChanged(const QualifiedName& name, const AtomString& oldValue, const AtomString& newValue, AttributeModificationReason attributeModificationReason)
{
if (name == openAttr) {
bool oldValue = m_isOpen;
m_isOpen = !newValue.isNull();
if (oldValue != m_isOpen) {
RefPtr root = shadowRoot();
ASSERT(root);
if (m_isOpen)
root->appendChild(*m_defaultSlot);
else
root->removeChild(*m_defaultSlot);
// https://html.spec.whatwg.org/#details-notification-task-steps
if (m_isToggleEventTaskQueued)
return;
queueTaskKeepingThisNodeAlive(TaskSource::DOMManipulation, [this] {
dispatchEvent(Event::create(eventNames().toggleEvent, Event::CanBubble::No, Event::IsCancelable::No));
m_isToggleEventTaskQueued = false;
});
m_isToggleEventTaskQueued = true;
}
} else
HTMLElement::attributeChanged(name, oldValue, newValue, attributeModificationReason);
}
void HTMLDetailsElement::toggleOpen()
{
setBooleanAttribute(openAttr, !m_isOpen);
// We need to post to the document because toggling this element will delete it.
if (AXObjectCache* cache = document().existingAXObjectCache())
cache->postNotification(nullptr, &document(), AXObjectCache::AXExpandedChanged);
}
}
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