Import Dart bindings as of Blink r188698. This merely copies the files over and does not attach any…

sky/engine/bindings-dart/core/dart/DartCustomElementWrapper.cpp

+/*
+ * Copyright (C) 2012 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 "bindings/core/dart/DartCustomElementWrapper.h"
+
+#include "bindings/core/dart/DartCustomElementLifecycleCallbacks.h"
+#include "bindings/core/dart/DartHTMLElement.h"
+#include "bindings/core/dart/DartSVGElement.h"
+#include "core/DartHTMLElementWrapperFactory.h"
+#include "core/DartSVGElementWrapperFactory.h"
+#include "core/dom/custom/CustomElement.h"
+#include "core/html/HTMLElement.h"
+#include "core/html/HTMLUnknownElement.h"
+#include "core/svg/SVGElement.h"
+
+namespace blink {
+
+template<typename ElementType>
+Dart_Handle createDartDirectWrapper(DartDOMData*, ElementType*);
+
+template<>
+Dart_Handle createDartDirectWrapper<HTMLElement>(DartDOMData* domData, HTMLElement* element)
+{
+    return DartDOMWrapper::createWrapper<DartHTMLElement>(domData, element);
+}
+
+template<>
+Dart_Handle createDartDirectWrapper<SVGElement>(DartDOMData* domData, SVGElement* element)
+{
+    return DartDOMWrapper::createWrapper<DartSVGElement>(domData, element);
+}
+
+template<typename ElementType>
+Dart_Handle createDartFallbackWrapper(DartDOMData*, ElementType*);
+
+template<>
+Dart_Handle createDartFallbackWrapper<HTMLElement>(DartDOMData* domData, HTMLElement* element)
+{
+    return createDartHTMLFallbackWrapper(domData, toHTMLUnknownElement(element));
+}
+
+template<>
+Dart_Handle createDartFallbackWrapper<SVGElement>(DartDOMData* domData, SVGElement* element)
+{
+    return createDartSVGFallbackWrapper(domData, element);
+}
+
+template<typename ElementType>
+Dart_Handle createUpgradeCandidateWrapper(ElementType* element, Dart_Handle (*createSpecificWrapper)(DartDOMData*, ElementType* element))
+{
+    DartDOMData* domData = DartDOMData::current();
+    if (CustomElement::isValidName(element->localName()))
+        return createDartDirectWrapper(domData, element);
+    if (createSpecificWrapper)
+        return createSpecificWrapper(domData, element);
+    return createDartFallbackWrapper(domData, element);
+}
+
+template<typename ElementType>
+Dart_Handle DartCustomElementWrapper<ElementType>::wrap(PassRefPtr<ElementType> element, Dart_Handle (*createSpecificWrapper)(DartDOMData* domData, ElementType*))
+{
+    if (!element->isUpgradedCustomElement())
+        return createUpgradeCandidateWrapper(element.get(), createSpecificWrapper);
+
+    return upgradeDartWrapper(element.get(), createSpecificWrapper);
+}
+
+template<>
+Dart_Handle DartCustomElementWrapper<HTMLElement>::swapElementWrapper(DartDOMData* domData, HTMLElement* element, Dart_Handle wrapperType, intptr_t nativeClassId)
+{
+    Dart_WeakPersistentHandle oldInstance = DartDOMWrapper::lookupWrapper<DartHTMLElement>(
+        domData, reinterpret_cast<HTMLElement*>(element));
+    Dart_Handle oldWrapper = 0;
+    if (oldInstance) {
+        oldWrapper = Dart_HandleFromWeakPersistent(oldInstance);
+        DartDOMWrapper::disassociateWrapper<DartHTMLElement>(
+            domData,
+            reinterpret_cast<HTMLElement*>(element),
+            oldWrapper);
+    }
+
+    Dart_Handle newWrapper = Dart_Allocate(wrapperType);
+    ASSERT(!Dart_IsError(newWrapper));
+    DartDOMWrapper::writeNativePointer(newWrapper, element, nativeClassId);
+
+    Dart_Handle result = Dart_InvokeConstructor(newWrapper, Dart_NewStringFromCString("created"), 0, 0);
+
+    if (Dart_IsError(result)) {
+        DartUtilities::reportProblem(domData->scriptExecutionContext(), result);
+
+        // Fall back to the old wrapper if possible.
+        if (oldWrapper) {
+            DartDOMWrapper::associateWrapper<DartHTMLElement>(domData, element, oldWrapper);
+            return oldWrapper;
+        }
+        return result;
+    }
+    return newWrapper;
+}
+
+template<>
+Dart_Handle DartCustomElementWrapper<SVGElement>::swapElementWrapper(DartDOMData* domData, SVGElement* element, Dart_Handle wrapperType, intptr_t nativeClassId)
+{
+    // TODO: support SVG elements.
+    ASSERT(FALSE);
+    return Dart_Handle();
+}
+
+template<>
+Dart_Handle DartCustomElementWrapper<HTMLElement>::upgradeDartWrapper(HTMLElement* element, Dart_Handle (*createSpecificWrapper)(DartDOMData*, HTMLElement*))
+{
+    DartDOMData* domData = DartDOMData::current();
+    DartCustomElementBinding* binding = domData->customElementBinding(element->customElementDefinition());
+    if (!binding)
+        return createUpgradeCandidateWrapper(element, createSpecificWrapper);
+
+    Dart_PersistentHandle customType = binding->customType();
+    ASSERT(!Dart_IsError(customType));
+
+    Dart_Handle newWrapper = swapElementWrapper(domData, element, customType, binding->nativeClassId());
+    if (Dart_IsError(newWrapper)) {
+        // When the upgrade fails the failed wrapper may have been associated,
+        // so we need to create a new one and re-associate it.
+        Dart_Handle fallbackWrapper = createUpgradeCandidateWrapper(element, createSpecificWrapper);
+        if (Dart_IsError(fallbackWrapper)) {
+            // FIXME: We can reach here on a stack overflow. We should cascade the exception from here, but that will
+            // require additional plumbing. We already reported the problem in swapElementWrapper so just return null
+            // here.
+            return Dart_Null();
+        }
+
+        DartDOMWrapper::associateWrapper<DartHTMLElement>(domData, element, fallbackWrapper);
+        DartDOMWrapper::writeNativePointer(fallbackWrapper, element, binding->nativeClassId());
+        return fallbackWrapper;
+    }
+    return newWrapper;
+}
+
+template<>
+Dart_Handle DartCustomElementWrapper<HTMLElement>::changeElementWrapper(Dart_Handle element, Dart_Handle wrapperType)
+{
+    DartDOMData* domData = DartDOMData::current();
+
+    intptr_t nativeClassId = reinterpret_cast<intptr_t>(DartDOMWrapper::readNativePointer(element, DartDOMWrapper::NativeTypeIndex));
+    Dart_Handle exception = 0;
+    HTMLElement* nativeElement = DartDOMWrapper::unwrapDartWrapper<DartHTMLElement>(domData, element, exception);
+    if (exception) {
+        return exception;
+    }
+    return swapElementWrapper(domData, nativeElement, wrapperType, nativeClassId);
+}
+
+template<>
+Dart_Handle DartCustomElementWrapper<SVGElement>::changeElementWrapper(Dart_Handle element, Dart_Handle wrapperType)
+{
+    // TODO: support SVG elements.
+    ASSERT(FALSE);
+    return Dart_Handle();
+}
+
+template<>
+Dart_Handle DartCustomElementWrapper<SVGElement>::upgradeDartWrapper(SVGElement* element, Dart_Handle (*createSpecificWrapper)(DartDOMData*, SVGElement*))
+{
+    // TODO: support SVG elements.
+    ASSERT(FALSE);
+    return Dart_Handle();
+}
+
+template<>
+void DartCustomElementWrapper<HTMLElement>::initializeCustomElement(Dart_Handle wrapper, Dart_Handle& exception)
+{
+    DartDOMData* domData = DartDOMData::current();
+    HTMLElement* element = DartDOMWrapper::unwrapDartWrapper<DartHTMLElement>(domData, wrapper, exception);
+    if (exception) {
+        return;
+    }
+    if (!element) {
+        exception = Dart_NewStringFromCString("created called outside of custom element creation.");
+        return;
+    }
+
+    DartDOMWrapper::associateWrapper<DartHTMLElement>(domData, element, wrapper);
+}
+
+template<>
+void DartCustomElementWrapper<SVGElement>::initializeCustomElement(Dart_Handle wrapper, Dart_Handle& exception)
+{
+    // TODO: support SVG elements.
+    ASSERT(FALSE);
+}
+
+template
+class DartCustomElementWrapper<HTMLElement>;
+
+template
+class DartCustomElementWrapper<SVGElement>;
+
+} // namespace blink