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/*
* 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. ``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
* 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 "JSCustomElementRegistry.h"
#include "CustomElementRegistry.h"
#include "Document.h"
#include "HTMLNames.h"
#include "JSCustomElementInterface.h"
#include "JSDOMBinding.h"
#include "JSDOMConvertSequences.h"
#include "JSDOMConvertStrings.h"
#include "JSDOMPromiseDeferred.h"
#include <wtf/SetForScope.h>
using namespace JSC;
namespace WebCore {
static JSObject* getCustomElementCallback(ExecState& state, JSObject& prototype, const Identifier& id)
{
VM& vm = state.vm();
auto scope = DECLARE_THROW_SCOPE(vm);
JSValue callback = prototype.get(&state, id);
RETURN_IF_EXCEPTION(scope, nullptr);
if (callback.isUndefined())
return nullptr;
if (!callback.isFunction()) {
throwTypeError(&state, scope, ASCIILiteral("A custom element callback must be a function"));
return nullptr;
}
return callback.getObject();
}
static bool validateCustomElementNameAndThrowIfNeeded(ExecState& state, const AtomicString& name)
{
auto scope = DECLARE_THROW_SCOPE(state.vm());
switch (Document::validateCustomElementName(name)) {
case CustomElementNameValidationStatus::Valid:
return true;
case CustomElementNameValidationStatus::FirstCharacterIsNotLowercaseASCIILetter:
throwSyntaxError(&state, scope, ASCIILiteral("Custom element name must have a lowercase ASCII letter as its first character"));
return false;
case CustomElementNameValidationStatus::ContainsUppercaseASCIILetter:
throwSyntaxError(&state, scope, ASCIILiteral("Custom element name cannot contain an uppercase ASCII letter"));
return false;
case CustomElementNameValidationStatus::ContainsNoHyphen:
throwSyntaxError(&state, scope, ASCIILiteral("Custom element name must contain a hyphen"));
return false;
case CustomElementNameValidationStatus::ContainsDisallowedCharacter:
throwSyntaxError(&state, scope, ASCIILiteral("Custom element name contains a character that is not allowed"));
return false;
case CustomElementNameValidationStatus::ConflictsWithStandardElementName:
throwSyntaxError(&state, scope, ASCIILiteral("Custom element name cannot be same as one of the standard elements"));
return false;
}
ASSERT_NOT_REACHED();
return false;
}
// https://html.spec.whatwg.org/#dom-customelementregistry-define
JSValue JSCustomElementRegistry::define(ExecState& state)
{
VM& vm = state.vm();
auto scope = DECLARE_THROW_SCOPE(vm);
if (UNLIKELY(state.argumentCount() < 2))
return throwException(&state, scope, createNotEnoughArgumentsError(&state));
AtomicString localName(state.uncheckedArgument(0).toString(&state)->toAtomicString(&state));
RETURN_IF_EXCEPTION(scope, JSValue());
JSValue constructorValue = state.uncheckedArgument(1);
if (!constructorValue.isConstructor())
return throwTypeError(&state, scope, ASCIILiteral("The second argument must be a constructor"));
JSObject* constructor = constructorValue.getObject();
if (!validateCustomElementNameAndThrowIfNeeded(state, localName))
return jsUndefined();
CustomElementRegistry& registry = wrapped();
if (registry.elementDefinitionIsRunning()) {
throwNotSupportedError(state, scope, ASCIILiteral("Cannot define a custom element while defining another custom element"));
return jsUndefined();
}
SetForScope<bool> change(registry.elementDefinitionIsRunning(), true);
if (registry.findInterface(localName)) {
throwNotSupportedError(state, scope, ASCIILiteral("Cannot define multiple custom elements with the same tag name"));
return jsUndefined();
}
if (registry.containsConstructor(constructor)) {
throwNotSupportedError(state, scope, ASCIILiteral("Cannot define multiple custom elements with the same class"));
return jsUndefined();
}
JSValue prototypeValue = constructor->get(&state, vm.propertyNames->prototype);
RETURN_IF_EXCEPTION(scope, JSValue());
if (!prototypeValue.isObject())
return throwTypeError(&state, scope, ASCIILiteral("Custom element constructor's prototype must be an object"));
JSObject& prototypeObject = *asObject(prototypeValue);
QualifiedName name(nullAtom(), localName, HTMLNames::xhtmlNamespaceURI);
auto elementInterface = JSCustomElementInterface::create(name, constructor, globalObject());
auto* connectedCallback = getCustomElementCallback(state, prototypeObject, Identifier::fromString(&vm, "connectedCallback"));
if (connectedCallback)
elementInterface->setConnectedCallback(connectedCallback);
RETURN_IF_EXCEPTION(scope, JSValue());
auto* disconnectedCallback = getCustomElementCallback(state, prototypeObject, Identifier::fromString(&vm, "disconnectedCallback"));
if (disconnectedCallback)
elementInterface->setDisconnectedCallback(disconnectedCallback);
RETURN_IF_EXCEPTION(scope, JSValue());
auto* adoptedCallback = getCustomElementCallback(state, prototypeObject, Identifier::fromString(&vm, "adoptedCallback"));
if (adoptedCallback)
elementInterface->setAdoptedCallback(adoptedCallback);
RETURN_IF_EXCEPTION(scope, JSValue());
auto* attributeChangedCallback = getCustomElementCallback(state, prototypeObject, Identifier::fromString(&vm, "attributeChangedCallback"));
RETURN_IF_EXCEPTION(scope, JSValue());
if (attributeChangedCallback) {
auto observedAttributesValue = constructor->get(&state, Identifier::fromString(&state, "observedAttributes"));
RETURN_IF_EXCEPTION(scope, JSValue());
if (!observedAttributesValue.isUndefined()) {
auto observedAttributes = convert<IDLSequence<IDLDOMString>>(state, observedAttributesValue);
RETURN_IF_EXCEPTION(scope, JSValue());
elementInterface->setAttributeChangedCallback(attributeChangedCallback, observedAttributes);
}
}
auto addToGlobalObjectWithPrivateName = [&] (JSObject* objectToAdd) {
if (objectToAdd) {
PrivateName uniquePrivateName;
globalObject()->putDirect(vm, uniquePrivateName, objectToAdd);
}
};
addToGlobalObjectWithPrivateName(constructor);
addToGlobalObjectWithPrivateName(connectedCallback);
addToGlobalObjectWithPrivateName(disconnectedCallback);
addToGlobalObjectWithPrivateName(adoptedCallback);
addToGlobalObjectWithPrivateName(attributeChangedCallback);
registry.addElementDefinition(WTFMove(elementInterface));
return jsUndefined();
}
// https://html.spec.whatwg.org/#dom-customelementregistry-whendefined
static JSValue whenDefinedPromise(ExecState& state, JSDOMGlobalObject& globalObject, CustomElementRegistry& registry, JSPromiseDeferred& promiseDeferred)
{
auto scope = DECLARE_THROW_SCOPE(state.vm());
if (UNLIKELY(state.argumentCount() < 1))
return throwException(&state, scope, createNotEnoughArgumentsError(&state));
AtomicString localName(state.uncheckedArgument(0).toString(&state)->toAtomicString(&state));
RETURN_IF_EXCEPTION(scope, JSValue());
if (!validateCustomElementNameAndThrowIfNeeded(state, localName)) {
ASSERT(scope.exception());
return jsUndefined();
}
if (registry.findInterface(localName)) {
DeferredPromise::create(globalObject, promiseDeferred)->resolve();
return promiseDeferred.promise();
}
auto result = registry.promiseMap().ensure(localName, [&] {
return DeferredPromise::create(globalObject, promiseDeferred);
});
return result.iterator->value->promise();
}
JSValue JSCustomElementRegistry::whenDefined(ExecState& state)
{
auto scope = DECLARE_CATCH_SCOPE(state.vm());
ASSERT(globalObject());
auto promiseDeferred = JSPromiseDeferred::create(&state, globalObject());
ASSERT(promiseDeferred);
JSValue promise = whenDefinedPromise(state, *globalObject(), wrapped(), *promiseDeferred);
if (UNLIKELY(scope.exception())) {
rejectPromiseWithExceptionIfAny(state, *globalObject(), *promiseDeferred);
scope.assertNoException();
return promiseDeferred->promise();
}
return promise;
}
}
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