Dartium changes for custom element lifecycle events.

Source/bindings/dart/DartCustomElement.cpp

-// Copyright 2013, Google 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:
-//
-//    * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//    * 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.
-//    * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
-// OWNER 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 "DartCustomElement.h"
-
-namespace WebCore {
-
-Dart_Handle DartCustomElement::createWrapper(Element* impl, CreateWrapperFunction createWrapper)
-{
-    if (!impl)
-        return Dart_Null();
-
-    HTMLElement* element = reinterpret_cast<HTMLElement*>(impl);
-
-    ASSERT(!DartDOMWrapper::lookupWrapper(DartHTMLElement::isNode, element));
-
-    // FIXME: Streamline the common path. If an element is already upgraded properly,
-    // we shouldn't need all this checking.
-
-    // Look up custom Dart type.
-    DartDOMData* domData = DartDOMData::current();
-    String name = element->localName();
-    DartCustomElementMap* map = domData->customElementMap();
-    Dart_PersistentHandle persistent = map->get(name);
-    if (!persistent) {
-        // Not a custom tag. Check for type extension.
-        if (element->hasAttribute("is")) {
-            name = element->getAttribute("is");
-            persistent = map->get(name);
-        }
-
-        // No custom type. Fall back onto builtin wrapper type.
-        if (!persistent) {
-            return createWrapper.invoke(element);
-        }
-    }
-
-    Dart_Handle type = Dart_HandleFromPersistent(persistent);
-    ASSERT(!Dart_IsError(type));
-
-    DartCustomElementMap* nativeMap = domData->customBaseElementMap();
-    Dart_Handle expectedNativeType = Dart_HandleFromPersistent(nativeMap->get(name));
-    ASSERT(!Dart_IsError(expectedNativeType));
-
-    // FIXME: Avoid allocating the fallback wrapper until we know we need it.
-    Dart_Handle fallback = createWrapper.invoke(element);
-    Dart_Handle actualNativeType = Dart_InstanceGetType(fallback);
-    ASSERT(!Dart_IsError(actualNativeType));
-
-    if (!Dart_IdentityEquals(actualNativeType, expectedNativeType)) {
-        // The registered custom type does not match. Just fallback.
-        return fallback;
-    }
-    DartDOMWrapper::disassociateWrapper<DartHTMLElement>(element, fallback);
-
-    Dart_Handle newInstance = Dart_Allocate(type);
-    ASSERT(!Dart_IsError(newInstance));
-
-    Dart_Handle result = Dart_SetNativeInstanceField(newInstance, 0, reinterpret_cast<intptr_t>(element));
-    UNUSED_PARAM(result);
-    ASSERT(!Dart_IsError(result));
-
-    DartDOMWrapper::associateWrapper<DartHTMLElement>(element, newInstance);
-    Dart_Invoke(newInstance, Dart_NewStringFromCString("created"), 0, 0);
-    return newInstance;
-}
-
-Dart_WeakPersistentHandle DartCustomElement::lookupWrapper(
-    DartDOMData* domData, Dart_WeakPersistentHandle wrapper, Element* impl)
-{
-    ASSERT(impl);
-    ASSERT(wrapper);
-
-    HTMLElement* element = reinterpret_cast<HTMLElement*>(impl);
-
-    // FIXME: Streamline the common path. If an element is already upgraded properly,
-    // we shouldn't need all this checking.
-
-    // Look up custom Dart type.
-    String name = element->localName();
-    DartCustomElementMap* map = domData->customElementMap();
-    Dart_PersistentHandle persistent = map->get(name);
-    if (!persistent) {
-        // Not a custom tag. Check for type extension.
-        if (element->hasAttribute("is")) {
-            name = element->getAttribute("is");
-            persistent = map->get(name);
-        }
-
-        // No custom type. Fall back onto builtin wrapper type.
-        if (!persistent) {
-            return wrapper;
-        }
-    }
-    // Previous wrapper exists. Test for upgrade.
-    Dart_Handle type = Dart_HandleFromPersistent(persistent);
-    Dart_Handle oldInstance = Dart_HandleFromWeakPersistent(wrapper);
-    Dart_Handle oldType = Dart_InstanceGetType(oldInstance);
-    ASSERT(!Dart_IsError(oldType));
-    if (Dart_IdentityEquals(oldType, type))
-        return wrapper;
-
-    DartCustomElementMap* nativeMap = domData->customBaseElementMap();
-    Dart_Handle expectedNativeType = Dart_HandleFromPersistent(nativeMap->get(name));
-    ASSERT(!Dart_IsError(expectedNativeType));
-
-    if (!Dart_IdentityEquals(oldType, expectedNativeType)) {
-        // The registered custom type does not match. Just fallback.
-        return wrapper;
-    }
-
-    return 0;
-}
-
-} // namespace WebCore