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