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/*
* Copyright (C) 2013 Google Inc. All rights reserved.
* Copyright (C) 2015-2017 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "JSCustomElementInterface.h"
#include "DOMWrapperWorld.h"
#include "HTMLUnknownElement.h"
#include "JSDOMBinding.h"
#include "JSDOMConvertNullable.h"
#include "JSDOMConvertStrings.h"
#include "JSDOMWindow.h"
#include "JSElement.h"
#include "JSHTMLElement.h"
#include "JSMainThreadExecState.h"
#include "JSMainThreadExecStateInstrumentation.h"
#include "ScriptExecutionContext.h"
#include <JavaScriptCore/JSLock.h>
#include <JavaScriptCore/WeakInlines.h>
namespace WebCore {
using namespace JSC;
JSCustomElementInterface::JSCustomElementInterface(const QualifiedName& name, JSObject* constructor, JSDOMGlobalObject* globalObject)
: ActiveDOMCallback(globalObject->scriptExecutionContext())
, m_name(name)
, m_constructor(constructor)
, m_isolatedWorld(globalObject->world())
{
}
JSCustomElementInterface::~JSCustomElementInterface() = default;
static RefPtr<Element> constructCustomElementSynchronously(Document&, VM&, ExecState&, JSObject* constructor, const AtomicString& localName);
Ref<Element> JSCustomElementInterface::constructElementWithFallback(Document& document, const AtomicString& localName)
{
if (auto element = tryToConstructCustomElement(document, localName))
return element.releaseNonNull();
auto element = HTMLUnknownElement::create(QualifiedName(nullAtom(), localName, HTMLNames::xhtmlNamespaceURI), document);
element->setIsCustomElementUpgradeCandidate();
element->setIsFailedCustomElement(*this);
return WTFMove(element);
}
Ref<Element> JSCustomElementInterface::constructElementWithFallback(Document& document, const QualifiedName& name)
{
if (auto element = tryToConstructCustomElement(document, name.localName())) {
if (!name.prefix().isNull())
element->setPrefix(name.prefix());
return element.releaseNonNull();
}
auto element = HTMLUnknownElement::create(name, document);
element->setIsCustomElementUpgradeCandidate();
element->setIsFailedCustomElement(*this);
return WTFMove(element);
}
RefPtr<Element> JSCustomElementInterface::tryToConstructCustomElement(Document& document, const AtomicString& localName)
{
if (!canInvokeCallback())
return nullptr;
Ref<JSCustomElementInterface> protectedThis(*this);
VM& vm = m_isolatedWorld->vm();
JSLockHolder lock(vm);
auto scope = DECLARE_CATCH_SCOPE(vm);
if (!m_constructor)
return nullptr;
ASSERT(&document == scriptExecutionContext());
auto& state = *document.execState();
auto element = constructCustomElementSynchronously(document, vm, state, m_constructor.get(), localName);
EXCEPTION_ASSERT(!!scope.exception() == !element);
if (!element) {
auto* exception = scope.exception();
scope.clearException();
reportException(&state, exception);
return nullptr;
}
return element;
}
// https://dom.spec.whatwg.org/#concept-create-element
// 6. 1. If the synchronous custom elements flag is set
static RefPtr<Element> constructCustomElementSynchronously(Document& document, VM& vm, ExecState& state, JSObject* constructor, const AtomicString& localName)
{
auto scope = DECLARE_THROW_SCOPE(vm);
ConstructData constructData;
ConstructType constructType = constructor->methodTable(vm)->getConstructData(constructor, constructData);
if (constructType == ConstructType::None) {
ASSERT_NOT_REACHED();
return nullptr;
}
InspectorInstrumentationCookie cookie = JSMainThreadExecState::instrumentFunctionConstruct(&document, constructType, constructData);
MarkedArgumentBuffer args;
ASSERT(!args.hasOverflowed());
JSValue newElement = construct(&state, constructor, constructType, constructData, args);
InspectorInstrumentation::didCallFunction(cookie, &document);
RETURN_IF_EXCEPTION(scope, nullptr);
ASSERT(!newElement.isEmpty());
HTMLElement* wrappedElement = JSHTMLElement::toWrapped(vm, newElement);
if (!wrappedElement) {
throwTypeError(&state, scope, ASCIILiteral("The result of constructing a custom element must be a HTMLElement"));
return nullptr;
}
if (wrappedElement->hasAttributes()) {
throwNotSupportedError(state, scope, ASCIILiteral("A newly constructed custom element must not have attributes"));
return nullptr;
}
if (wrappedElement->hasChildNodes()) {
throwNotSupportedError(state, scope, ASCIILiteral("A newly constructed custom element must not have child nodes"));
return nullptr;
}
if (wrappedElement->parentNode()) {
throwNotSupportedError(state, scope, ASCIILiteral("A newly constructed custom element must not have a parent node"));
return nullptr;
}
if (&wrappedElement->document() != &document) {
throwNotSupportedError(state, scope, ASCIILiteral("A newly constructed custom element belongs to a wrong docuemnt"));
return nullptr;
}
ASSERT(wrappedElement->namespaceURI() == HTMLNames::xhtmlNamespaceURI);
if (wrappedElement->localName() != localName) {
throwNotSupportedError(state, scope, ASCIILiteral("A newly constructed custom element belongs to a wrong docuemnt"));
return nullptr;
}
return wrappedElement;
}
void JSCustomElementInterface::upgradeElement(Element& element)
{
ASSERT(element.tagQName() == name());
ASSERT(element.isCustomElementUpgradeCandidate());
if (!canInvokeCallback())
return;
Ref<JSCustomElementInterface> protectedThis(*this);
VM& vm = m_isolatedWorld->vm();
JSLockHolder lock(vm);
auto scope = DECLARE_THROW_SCOPE(vm);
if (!m_constructor)
return;
auto* context = scriptExecutionContext();
if (!context)
return;
auto* globalObject = toJSDOMWindow(downcast<Document>(*context).frame(), m_isolatedWorld);
if (!globalObject)
return;
ExecState* state = globalObject->globalExec();
ConstructData constructData;
ConstructType constructType = m_constructor->methodTable(vm)->getConstructData(m_constructor.get(), constructData);
if (constructType == ConstructType::None) {
ASSERT_NOT_REACHED();
return;
}
CustomElementReactionQueue::enqueuePostUpgradeReactions(element);
m_constructionStack.append(&element);
MarkedArgumentBuffer args;
ASSERT(!args.hasOverflowed());
InspectorInstrumentationCookie cookie = JSMainThreadExecState::instrumentFunctionConstruct(context, constructType, constructData);
JSValue returnedElement = construct(state, m_constructor.get(), constructType, constructData, args);
InspectorInstrumentation::didCallFunction(cookie, context);
m_constructionStack.removeLast();
if (UNLIKELY(scope.exception())) {
element.setIsFailedCustomElement(*this);
reportException(state, scope.exception());
return;
}
Element* wrappedElement = JSElement::toWrapped(vm, returnedElement);
if (!wrappedElement || wrappedElement != &element) {
element.setIsFailedCustomElement(*this);
reportException(state, createDOMException(state, InvalidStateError, "Custom element constructor failed to upgrade an element"));
return;
}
element.setIsDefinedCustomElement(*this);
}
void JSCustomElementInterface::invokeCallback(Element& element, JSObject* callback, const WTF::Function<void(ExecState*, JSDOMGlobalObject*, MarkedArgumentBuffer&)>& addArguments)
{
if (!canInvokeCallback())
return;
auto* context = scriptExecutionContext();
if (!context)
return;
Ref<JSCustomElementInterface> protectedThis(*this);
VM& vm = m_isolatedWorld->vm();
JSLockHolder lock(vm);
auto* globalObject = toJSDOMWindow(downcast<Document>(*context).frame(), m_isolatedWorld);
if (!globalObject)
return;
ExecState* state = globalObject->globalExec();
JSObject* jsElement = asObject(toJS(state, globalObject, element));
CallData callData;
CallType callType = callback->methodTable(vm)->getCallData(callback, callData);
ASSERT(callType != CallType::None);
MarkedArgumentBuffer args;
addArguments(state, globalObject, args);
RELEASE_ASSERT(!args.hasOverflowed());
InspectorInstrumentationCookie cookie = JSMainThreadExecState::instrumentFunctionCall(context, callType, callData);
NakedPtr<JSC::Exception> exception;
JSMainThreadExecState::call(state, callback, callType, callData, jsElement, args, exception);
InspectorInstrumentation::didCallFunction(cookie, context);
if (exception)
reportException(state, exception);
}
void JSCustomElementInterface::setConnectedCallback(JSC::JSObject* callback)
{
m_connectedCallback = callback;
}
void JSCustomElementInterface::invokeConnectedCallback(Element& element)
{
invokeCallback(element, m_connectedCallback.get());
}
void JSCustomElementInterface::setDisconnectedCallback(JSC::JSObject* callback)
{
m_disconnectedCallback = callback;
}
void JSCustomElementInterface::invokeDisconnectedCallback(Element& element)
{
invokeCallback(element, m_disconnectedCallback.get());
}
void JSCustomElementInterface::setAdoptedCallback(JSC::JSObject* callback)
{
m_adoptedCallback = callback;
}
void JSCustomElementInterface::invokeAdoptedCallback(Element& element, Document& oldDocument, Document& newDocument)
{
invokeCallback(element, m_adoptedCallback.get(), [&](ExecState* state, JSDOMGlobalObject* globalObject, MarkedArgumentBuffer& args) {
args.append(toJS(state, globalObject, oldDocument));
args.append(toJS(state, globalObject, newDocument));
});
}
void JSCustomElementInterface::setAttributeChangedCallback(JSC::JSObject* callback, const Vector<String>& observedAttributes)
{
m_attributeChangedCallback = callback;
m_observedAttributes.clear();
for (auto& name : observedAttributes)
m_observedAttributes.add(name);
}
void JSCustomElementInterface::invokeAttributeChangedCallback(Element& element, const QualifiedName& attributeName, const AtomicString& oldValue, const AtomicString& newValue)
{
invokeCallback(element, m_attributeChangedCallback.get(), [&](ExecState* state, JSDOMGlobalObject*, MarkedArgumentBuffer& args) {
args.append(toJS<IDLDOMString>(*state, attributeName.localName()));
args.append(toJS<IDLNullable<IDLDOMString>>(*state, oldValue));
args.append(toJS<IDLNullable<IDLDOMString>>(*state, newValue));
args.append(toJS<IDLNullable<IDLDOMString>>(*state, attributeName.namespaceURI()));
});
}
void JSCustomElementInterface::didUpgradeLastElementInConstructionStack()
{
m_constructionStack.last() = nullptr;
}
} // namespace WebCore