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/*
* Copyright (C) 2007-2021 Apple Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include "config.h"
#include "JSDocument.h"
#include "Frame.h"
#include "FrameDestructionObserverInlines.h"
#include "JSDOMWindowCustom.h"
#include "JSHTMLDocument.h"
#include "JSXMLDocument.h"
#include "NodeTraversal.h"
#include "WebCoreOpaqueRoot.h"
#include <JavaScriptCore/HeapAnalyzer.h>
namespace WebCore {
using namespace JSC;
static inline JSValue createNewDocumentWrapper(JSGlobalObject& lexicalGlobalObject, JSDOMGlobalObject& globalObject, Ref<Document>&& passedDocument)
{
auto& document = passedDocument.get();
JSObject* wrapper;
if (document.isHTMLDocument())
wrapper = createWrapper<HTMLDocument>(&globalObject, WTFMove(passedDocument));
else if (document.isXMLDocument())
wrapper = createWrapper<XMLDocument>(&globalObject, WTFMove(passedDocument));
else
wrapper = createWrapper<Document>(&globalObject, WTFMove(passedDocument));
reportMemoryForDocumentIfFrameless(lexicalGlobalObject, document);
return wrapper;
}
JSObject* cachedDocumentWrapper(JSGlobalObject& lexicalGlobalObject, JSDOMGlobalObject& globalObject, Document& document)
{
if (auto* wrapper = getCachedWrapper(globalObject.world(), document))
return wrapper;
auto* window = document.domWindow();
if (!window)
return nullptr;
auto* documentGlobalObject = toJSDOMGlobalObject<JSDOMWindow>(lexicalGlobalObject.vm(), toJS(&lexicalGlobalObject, *window));
if (!documentGlobalObject)
return nullptr;
// Creating a wrapper for domWindow might have created a wrapper for document as well.
return getCachedWrapper(documentGlobalObject->world(), document);
}
void reportMemoryForDocumentIfFrameless(JSGlobalObject& lexicalGlobalObject, Document& document)
{
// Make sure the document is kept around by the window object, and works right with the back/forward cache.
if (document.frame())
return;
VM& vm = lexicalGlobalObject.vm();
size_t memoryCost = 0;
for (Node* node = &document; node; node = NodeTraversal::next(*node))
memoryCost += node->approximateMemoryCost();
// FIXME: Adopt reportExtraMemoryVisited, and switch to reportExtraMemoryAllocated.
// https://bugs.webkit.org/show_bug.cgi?id=142595
vm.heap.deprecatedReportExtraMemory(memoryCost);
}
JSValue toJSNewlyCreated(JSGlobalObject* lexicalGlobalObject, JSDOMGlobalObject* globalObject, Ref<Document>&& document)
{
return createNewDocumentWrapper(*lexicalGlobalObject, *globalObject, WTFMove(document));
}
JSValue toJS(JSGlobalObject* lexicalGlobalObject, JSDOMGlobalObject* globalObject, Document& document)
{
if (auto* wrapper = cachedDocumentWrapper(*lexicalGlobalObject, *globalObject, document))
return wrapper;
return toJSNewlyCreated(lexicalGlobalObject, globalObject, Ref<Document>(document));
}
template<typename Visitor>
void JSDocument::visitAdditionalChildren(Visitor& visitor)
{
addWebCoreOpaqueRoot(visitor, static_cast<ScriptExecutionContext&>(wrapped()));
}
DEFINE_VISIT_ADDITIONAL_CHILDREN(JSDocument);
void JSDocument::analyzeHeap(JSCell* cell, HeapAnalyzer& analyzer)
{
Base::analyzeHeap(cell, analyzer);
auto* thisObject = jsCast<JSDocument*>(cell);
analyzer.setLabelForCell(cell, thisObject->wrapped().url().string());
}
} // namespace WebCore
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