Introduce ES6 iterator for DOM objects.

Source/core/testing/Internals.cpp

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  * Copyright (C) 2013 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.
@@ skipping 30 matching lines @@
 #include "core/css/resolver/StyleResolverStats.h"
 #include "core/css/resolver/ViewportStyleResolver.h"
 #include "core/dom/ClientRect.h"
 #include "core/dom/ClientRectList.h"
 #include "core/dom/DOMStringList.h"
 #include "core/dom/Document.h"
 #include "core/dom/DocumentMarker.h"
 #include "core/dom/DocumentMarkerController.h"
 #include "core/dom/Element.h"
 #include "core/dom/ExceptionCode.h"
+#include "core/dom/Iterator.h"
 #include "core/dom/NodeRenderStyle.h"
 #include "core/dom/PseudoElement.h"
 #include "core/dom/Range.h"
 #include "core/dom/StaticNodeList.h"
 #include "core/dom/StyleEngine.h"
 #include "core/dom/TreeScope.h"
 #include "core/dom/ViewportDescription.h"
 #include "core/dom/shadow/ComposedTreeWalker.h"
 #include "core/dom/shadow/ElementShadow.h"
 #include "core/dom/shadow/SelectRuleFeatureSet.h"
 #include "core/dom/shadow/ShadowRoot.h"
 #include "core/editing/Editor.h"
 #include "core/editing/PlainTextRange.h"
 #include "core/editing/SpellCheckRequester.h"
 #include "core/editing/SpellChecker.h"
 #include "core/editing/SurroundingText.h"
 #include "core/editing/TextIterator.h"
 #include "core/fetch/MemoryCache.h"
 #include "core/fetch/ResourceFetcher.h"
-#include "core/frame/LocalDOMWindow.h"
 #include "core/frame/EventHandlerRegistry.h"
 #include "core/frame/FrameView.h"
+#include "core/frame/LocalDOMWindow.h"
 #include "core/frame/LocalFrame.h"
 #include "core/frame/Settings.h"
 #include "core/frame/WebKitPoint.h"
 #include "core/html/HTMLContentElement.h"
 #include "core/html/HTMLIFrameElement.h"
 #include "core/html/HTMLInputElement.h"
 #include "core/html/HTMLMediaElement.h"
 #include "core/html/HTMLPlugInElement.h"
 #include "core/html/HTMLSelectElement.h"
 #include "core/html/HTMLTextAreaElement.h"
@@ skipping 51 matching lines @@
 #include "public/platform/WebGraphicsContext3DProvider.h"
 #include "public/platform/WebLayer.h"
 #include "wtf/InstanceCounter.h"
 #include "wtf/PassOwnPtr.h"
 #include "wtf/dtoa.h"
 #include "wtf/text/StringBuffer.h"
 #include <v8.h>
 
 namespace blink {
 
+namespace {
+
+class InternalsIterator FINAL : public Iterator {
+public:
+    InternalsIterator() : m_current(0) { }
+
+    virtual ScriptValue next(ScriptState* scriptState, ExceptionState& exceptionState) OVERRIDE
+    {
+        v8::Isolate* isolate = scriptState->isolate();
+        v8::Local<v8::Value> value = v8::Integer::New(isolate, m_current * m_current);
+        bool done = (m_current >= 5);
+        ++m_current;
+
+        v8::Local<v8::Object> result = v8::Object::New(isolate);
+        result->Set(v8String(isolate, "value"), value);
+        result->Set(v8String(isolate, "done"), v8Boolean(done, isolate));
+        return ScriptValue(scriptState, result);

[arv (Not doing code reviews), 2014/09/02 14:31:24]

Once these becomes common we might want to introduce a helper...

[yhirano, 2014/09/03 06:42:29]

Yeah, the next CL has v8ResultIterator helper function. I will make
InternalsIterator use it.

[yhirano, 2014/09/03 07:21:05]

https://codereview.chromium.org/513203002/diff/220001/Source/core/testing/Int...

+    }
+
+    virtual ScriptValue next(ScriptState* scriptState, ScriptValue value, ExceptionState& exceptionState) OVERRIDE
+    {
+        exceptionState.throwTypeError("Not implemented");
+        return ScriptValue();
+    }
+
+private:
+    int m_current;
+};
+
+} // namespace
+
 // FIXME: oilpan: These will be removed soon.
 static MockPagePopupDriver* s_pagePopupDriver = 0;
 
 using namespace HTMLNames;
 
 static bool markerTypesFrom(const String& markerType, DocumentMarker::MarkerTypes& result)
 {
     if (markerType.isEmpty() || equalIgnoringCase(markerType, "all"))
         result = DocumentMarker::AllMarkers();
     else if (equalIgnoringCase(markerType, "Spelling"))
@@ skipping 2064 matching lines @@
         return;
     }
     if (!element->isPluginElement()) {
         exceptionState.throwDOMException(InvalidNodeTypeError, "The element provided is not a plugin.");
         return;
     }
     element->ensureUserAgentShadowRoot().setInnerHTML(htmlSource, exceptionState);
     toHTMLPlugInElement(element)->setUsePlaceholderContent(true);
 }
 
+Iterator* Internals::iterator(ScriptState* scriptState, ExceptionState& exceptionState)
+{
+    return new InternalsIterator;
+}
+
 } // namespace blink