Create wrappers for unresolved Custom Elements at the correct type

Source/bindings/v8/CustomElementHelpers.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
@@ skipping 20 matching lines @@
 #include "config.h"
 
 #include "bindings/v8/CustomElementHelpers.h"
 
 #include "HTMLNames.h"
 #include "V8CustomElementConstructor.h"
 #include "V8HTMLElementWrapperFactory.h"
 #include "bindings/v8/DOMWrapperWorld.h"
 #include "bindings/v8/ScriptController.h"
 #include "core/dom/CustomElementRegistry.h"
+#include "core/dom/Node.h"
+#include "core/html/HTMLElement.h"
+#include "core/html/HTMLUnknownElement.h"
 
 #if ENABLE(SVG)
 #include "V8SVGElementWrapperFactory.h"
 #include "SVGNames.h"
+#include "core/svg/SVGElement.h"
 #endif
 
 namespace WebCore {
 
-v8::Handle<v8::Object> CustomElementHelpers::createWrapper(PassRefPtr<Element> impl, v8::Handle<v8::Object> creationContext, v8::Isolate* isolate)
+v8::Handle<v8::Object> CustomElementHelpers::createWrapper(PassRefPtr<Element> impl, v8::Handle<v8::Object> creationContext, v8::Isolate* isolate, const CreateWrapperFunction& createTypeExtensionUpgradeCandidateWrapper)
 {
     ASSERT(impl);
 
     // The constructor and registered lifecycle callbacks should be visible only from main world.
     // FIXME: This shouldn't be needed once each custom element has its own FunctionTemplate
     // https://bugs.webkit.org/show_bug.cgi?id=108138
     if (!CustomElementHelpers::isFeatureAllowed(creationContext->CreationContext())) {
         v8::Handle<v8::Object> wrapper = V8DOMWrapper::createWrapper(creationContext, &V8HTMLElement::info, impl.get(), isolate);
         if (!wrapper.IsEmpty())
             V8DOMWrapper::associateObjectWithWrapper(impl, &V8HTMLElement::info, wrapper, isolate, WrapperConfiguration::Dependent);
         return wrapper;
     }
 
     CustomElementRegistry* registry = impl->document()->registry();
     RefPtr<CustomElementDefinition> definition = registry->findFor(impl.get());
-    if (!definition) {
-        // FIXME: When can this happen?
-        return v8::Handle<v8::Object>();
-    }
+    if (!definition)
+        return createUpgradeCandidateWrapper(impl, creationContext, isolate, createTypeExtensionUpgradeCandidateWrapper);
+
     v8::Handle<v8::Object> prototype = v8::Handle<v8::Object>::Cast(definition->prototype().v8Value());
 
     WrapperTypeInfo* typeInfo = CustomElementHelpers::findWrapperType(prototype);
     if (!typeInfo) {
         // FIXME: When can this happen?
         return v8::Handle<v8::Object>();
     }
 
     v8::Handle<v8::Object> wrapper = V8DOMWrapper::createWrapper(creationContext, typeInfo, impl.get(), isolate);
     if (wrapper.IsEmpty())
         return v8::Handle<v8::Object>();
 
     wrapper->SetPrototype(prototype);
     V8DOMWrapper::associateObjectWithWrapper(impl, typeInfo, wrapper, isolate, WrapperConfiguration::Dependent);
     return wrapper;
 }
 
+v8::Handle<v8::Object> CustomElementHelpers::CreateWrapperFunction::invoke(Element* element, v8::Handle<v8::Object> creationContext, v8::Isolate* isolate) const
+{
+    if (element->isHTMLElement()) {
+        if (m_html)
+            return m_html(toHTMLElement(element), creationContext, isolate);
+        return createV8HTMLFallbackWrapper(toHTMLUnknownElement(toHTMLElement(element)), creationContext, isolate);
+    }
+#if ENABLE(SVG)
+    else if (element->isSVGElement()) {
+        if (m_svg)
+            return m_svg(toSVGElement(element), creationContext, isolate);
+        return createV8SVGFallbackWrapper(toSVGElement(element), creationContext, isolate);
+    }
+#endif
+    ASSERT(0);
+    return v8::Handle<v8::Object>();
+}
+
+v8::Handle<v8::Object> CustomElementHelpers::createUpgradeCandidateWrapper(PassRefPtr<Element> element, v8::Handle<v8::Object> creationContext, v8::Isolate* isolate, const CreateWrapperFunction& createTypeExtensionUpgradeCandidateWrapper)
+{
+    if (CustomElementRegistry::isCustomTagName(element->localName())) {
+        if (element->isHTMLElement())
+            return createV8HTMLDirectWrapper(toHTMLElement(element.get()), creationContext, isolate);
+    #if ENABLE(SVG)
+        else if (element->isSVGElement())
+            return createV8SVGDirectWrapper(toSVGElement(element.get()), creationContext, isolate);
+    #endif
+        else {
+            ASSERT(0);
+            return v8::Handle<v8::Object>();
+        }
+    } else {
+        // It's a type extension
+        return createTypeExtensionUpgradeCandidateWrapper.invoke(element.get(), creationContext, isolate);
+    }
+}
+
 bool CustomElementHelpers::initializeConstructorWrapper(CustomElementConstructor* constructor, const ScriptValue& prototype, ScriptState* state)
 {
     ASSERT(isFeatureAllowed(state));
     ASSERT(!prototype.v8Value().IsEmpty() && prototype.v8Value()->IsObject());
     v8::Handle<v8::Value> wrapperValue = toV8(constructor, state->context()->Global(), state->context()->GetIsolate());
     if (wrapperValue.IsEmpty() || !wrapperValue->IsObject())
         return false;
     v8::Handle<v8::Function> wrapper = v8::Handle<v8::Function>::Cast(wrapperValue);
     // - Object::ForceSet() nor Object::SetAccessor Doesn't work against the "prototype" property of function objects.
     // - Set()-ing here is safe because
@@ skipping 99 matching lines @@
         return 0;
     if (const QualifiedName* htmlName = findHTMLTagNameOfV8Type(type))
         return htmlName;
 #if ENABLE(SVG)
     if (const QualifiedName* svgName = findSVGTagNameOfV8Type(type))
         return svgName;
 #endif
     return 0;
 }
 
+bool CustomElementHelpers::isCustomElement(Element* element)
+{
+    // FIXME: This dynamically consults the "is" attribute; instead a
+    // bit should be marked on elements that are Custom Elements
+    return CustomElementRegistry::isCustomTagName(element->localName()) || CustomElementRegistry::isCustomTagName(element->getAttribute(HTMLNames::isAttr));
+}
+
 void CustomElementHelpers::invokeReadyCallbackIfNeeded(Element* element, v8::Handle<v8::Context> context)
 {
     v8::Handle<v8::Value> wrapperValue = toV8(element, context->Global(), context->GetIsolate());
     if (wrapperValue.IsEmpty() || !wrapperValue->IsObject())
         return;
     v8::Handle<v8::Object> wrapper = v8::Handle<v8::Object>::Cast(wrapperValue);
     v8::Handle<v8::Value> prototypeValue = wrapper->GetPrototype();
     if (prototypeValue.IsEmpty() || !prototypeValue->IsObject())
         return;
     v8::Handle<v8::Object> prototype = v8::Handle<v8::Object>::Cast(prototypeValue);
@@ skipping 19 matching lines @@
         return;
     v8::Context::Scope scope(context);
 
     for (size_t i = 0; i < invocations.size(); ++i) {
         ASSERT(executionContext == invocations[i].element()->document());
         invokeReadyCallbackIfNeeded(invocations[i].element(), context);
     }
 }
 
 } // namespace WebCore