--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/WebCore/bindings/js/JSDOMBinding.cpp Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,761 @@
+/*
+ * Copyright (C) 1999-2001 Harri Porten (porten@kde.org)
+ * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
+ * Copyright (C) 2007 Samuel Weinig <sam@webkit.org>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "config.h"
+#include "JSDOMBinding.h"
+
+#include "debugger/DebuggerCallFrame.h"
+
+#include "ActiveDOMObject.h"
+#include "CSSHelper.h"
+#include "DOMCoreException.h"
+#include "DOMObjectHashTableMap.h"
+#include "Document.h"
+#include "EventException.h"
+#include "ExceptionBase.h"
+#include "ExceptionCode.h"
+#include "Frame.h"
+#include "HTMLAudioElement.h"
+#include "HTMLCanvasElement.h"
+#include "HTMLFrameElementBase.h"
+#include "HTMLImageElement.h"
+#include "HTMLNames.h"
+#include "HTMLScriptElement.h"
+#include "JSDOMCoreException.h"
+#include "JSDOMWindowCustom.h"
+#include "JSDebugWrapperSet.h"
+#include "JSEventException.h"
+#include "JSExceptionBase.h"
+#include "JSNode.h"
+#include "JSRangeException.h"
+#include "JSXMLHttpRequestException.h"
+#include "KURL.h"
+#include "MessagePort.h"
+#include "RangeException.h"
+#include "ScriptCachedFrameData.h"
+#include "ScriptController.h"
+#include "Settings.h"
+#include "WebCoreJSClientData.h"
+#include "XMLHttpRequestException.h"
+#include <runtime/DateInstance.h>
+#include <runtime/Error.h>
+#include <runtime/JSFunction.h>
+#include <runtime/PrototypeFunction.h>
+#include <wtf/MathExtras.h>
+#include <wtf/StdLibExtras.h>
+
+#if ENABLE(SVG)
+#include "JSSVGException.h"
+#include "SVGException.h"
+#endif
+
+#if ENABLE(XPATH)
+#include "JSXPathException.h"
+#include "XPathException.h"
+#endif
+
+#if ENABLE(DATABASE)
+#include "JSSQLException.h"
+#include "SQLException.h"
+#endif
+
+using namespace JSC;
+
+namespace WebCore {
+
+using namespace HTMLNames;
+
+typedef Document::JSWrapperCache JSWrapperCache;
+typedef Document::JSWrapperCacheMap JSWrapperCacheMap;
+
+class JSGlobalDataWorldIterator {
+public:
+ JSGlobalDataWorldIterator(JSGlobalData* globalData)
+ : m_pos(static_cast<WebCoreJSClientData*>(globalData->clientData)->m_worldSet.begin())
+ , m_end(static_cast<WebCoreJSClientData*>(globalData->clientData)->m_worldSet.end())
+ {
+ }
+
+ operator bool()
+ {
+ return m_pos != m_end;
+ }
+
+ DOMWrapperWorld* operator*()
+ {
+ ASSERT(m_pos != m_end);
+ return *m_pos;
+ }
+
+ DOMWrapperWorld* operator->()
+ {
+ ASSERT(m_pos != m_end);
+ return *m_pos;
+ }
+
+ JSGlobalDataWorldIterator& operator++()
+ {
+ ++m_pos;
+ return *this;
+ }
+
+private:
+ HashSet<DOMWrapperWorld*>::iterator m_pos;
+ HashSet<DOMWrapperWorld*>::iterator m_end;
+};
+
+const JSC::HashTable* getHashTableForGlobalData(JSGlobalData& globalData, const JSC::HashTable* staticTable)
+{
+ return DOMObjectHashTableMap::mapFor(globalData).get(staticTable);
+}
+
+bool hasCachedDOMObjectWrapperUnchecked(JSGlobalData* globalData, void* objectHandle)
+{
+ for (JSGlobalDataWorldIterator worldIter(globalData); worldIter; ++worldIter) {
+ if (worldIter->m_wrappers.uncheckedGet(objectHandle))
+ return true;
+ }
+ return false;
+}
+
+bool hasCachedDOMObjectWrapper(JSGlobalData* globalData, void* objectHandle)
+{
+ for (JSGlobalDataWorldIterator worldIter(globalData); worldIter; ++worldIter) {
+ if (worldIter->m_wrappers.get(objectHandle))
+ return true;
+ }
+ return false;
+}
+
+DOMObject* getCachedDOMObjectWrapper(JSC::ExecState* exec, void* objectHandle)
+{
+ return domObjectWrapperMapFor(exec).get(objectHandle);
+}
+
+void cacheDOMObjectWrapper(JSC::ExecState* exec, void* objectHandle, DOMObject* wrapper)
+{
+ JSDebugWrapperSet::willCacheWrapper(wrapper);
+ domObjectWrapperMapFor(exec).set(objectHandle, wrapper);
+}
+
+bool hasCachedDOMNodeWrapperUnchecked(Document* document, Node* node)
+{
+ if (!document)
+ return hasCachedDOMObjectWrapperUnchecked(JSDOMWindow::commonJSGlobalData(), node);
+
+ JSWrapperCacheMap& wrapperCacheMap = document->wrapperCacheMap();
+ for (JSWrapperCacheMap::iterator iter = wrapperCacheMap.begin(); iter != wrapperCacheMap.end(); ++iter) {
+ if (iter->second->uncheckedGet(node))
+ return true;
+ }
+ return false;
+}
+
+void forgetDOMObject(DOMObject* wrapper, void* objectHandle)
+{
+ JSC::JSGlobalData* globalData = Heap::heap(wrapper)->globalData();
+
+ // Check the normal world first!
+ JSGlobalData::ClientData* clientData = globalData->clientData;
+ ASSERT(clientData);
+ DOMObjectWrapperMap& wrappers = static_cast<WebCoreJSClientData*>(clientData)->normalWorld()->m_wrappers;
+ if (wrappers.uncheckedRemove(objectHandle, wrapper)) {
+ JSDebugWrapperSet::didUncacheWrapper(wrapper);
+ return;
+ }
+
+ // We can't guarantee that a wrapper is in the cache when it uncaches itself,
+ // since a new wrapper may be cached before the old wrapper's destructor runs.
+ for (JSGlobalDataWorldIterator worldIter(globalData); worldIter; ++worldIter) {
+ if (worldIter->m_wrappers.uncheckedRemove(objectHandle, wrapper))
+ break;
+ }
+ JSDebugWrapperSet::didUncacheWrapper(wrapper);
+}
+
+void forgetDOMNode(JSNode* wrapper, Node* node, Document* document)
+{
+ node->clearWrapper(wrapper);
+
+ if (!document) {
+ forgetDOMObject(wrapper, node);
+ return;
+ }
+
+ // We can't guarantee that a wrapper is in the cache when it uncaches itself,
+ // since a new wrapper may be cached before the old wrapper's destructor runs.
+ JSWrapperCacheMap& wrapperCacheMap = document->wrapperCacheMap();
+ for (JSWrapperCacheMap::iterator wrappersIter = wrapperCacheMap.begin(); wrappersIter != wrapperCacheMap.end(); ++wrappersIter) {
+ if (wrappersIter->second->uncheckedRemove(node, wrapper))
+ break;
+ }
+ JSDebugWrapperSet::didUncacheWrapper(wrapper);
+}
+
+void cacheDOMNodeWrapper(JSC::ExecState* exec, Document* document, Node* node, JSNode* wrapper)
+{
+ JSDebugWrapperSet::willCacheWrapper(wrapper);
+
+ if (!document)
+ domObjectWrapperMapFor(exec).set(node, wrapper);
+ else
+ document->getWrapperCache(currentWorld(exec))->set(node, wrapper);
+
+ if (currentWorld(exec)->isNormal())
+ node->setWrapper(wrapper);
+}
+
+static inline bool isObservableThroughDOM(JSNode* jsNode, DOMWrapperWorld* world)
+{
+ // Certain conditions implicitly make a JS DOM node wrapper observable
+ // through the DOM, even if no explicit reference to it remains.
+
+ Node* node = jsNode->impl();
+
+ if (node->inDocument()) {
+ // If a node is in the document, and its wrapper has custom properties,
+ // the wrapper is observable because future access to the node through the
+ // DOM must reflect those properties.
+ if (jsNode->hasCustomProperties())
+ return true;
+
+ // If a node is in the document, and has event listeners, its wrapper is
+ // observable because its wrapper is responsible for marking those event listeners.
+ if (node->hasEventListeners())
+ return true; // Technically, we may overzealously mark a wrapper for a node that has only non-JS event listeners. Oh well.
+
+ // If a node owns another object with a wrapper with custom properties,
+ // the wrapper must be treated as observable, because future access to
+ // those objects through the DOM must reflect those properties.
+ // FIXME: It would be better if this logic could be in the node next to
+ // the custom markChildren functions rather than here.
+ if (node->isElementNode()) {
+ if (NamedNodeMap* attributes = static_cast<Element*>(node)->attributeMap()) {
+ if (DOMObject* wrapper = world->m_wrappers.uncheckedGet(attributes)) {
+ if (wrapper->hasCustomProperties())
+ return true;
+ }
+ }
+ if (node->isStyledElement()) {
+ if (CSSMutableStyleDeclaration* style = static_cast<StyledElement*>(node)->inlineStyleDecl()) {
+ if (DOMObject* wrapper = world->m_wrappers.uncheckedGet(style)) {
+ if (wrapper->hasCustomProperties())
+ return true;
+ }
+ }
+ }
+ if (static_cast<Element*>(node)->hasTagName(canvasTag)) {
+ if (CanvasRenderingContext* context = static_cast<HTMLCanvasElement*>(node)->renderingContext()) {
+ if (DOMObject* wrapper = world->m_wrappers.uncheckedGet(context)) {
+ if (wrapper->hasCustomProperties())
+ return true;
+ }
+ }
+ }
+ }
+ } else {
+ // If a wrapper is the last reference to an image or script element
+ // that is loading but not in the document, the wrapper is observable
+ // because it is the only thing keeping the image element alive, and if
+ // the image element is destroyed, its load event will not fire.
+ // FIXME: The DOM should manage this issue without the help of JavaScript wrappers.
+ if (node->hasTagName(imgTag) && !static_cast<HTMLImageElement*>(node)->haveFiredLoadEvent())
+ return true;
+ if (node->hasTagName(scriptTag) && !static_cast<HTMLScriptElement*>(node)->haveFiredLoadEvent())
+ return true;
+#if ENABLE(VIDEO)
+ if (node->hasTagName(audioTag) && !static_cast<HTMLAudioElement*>(node)->paused())
+ return true;
+#endif
+ }
+
+ // If a node is firing event listeners, its wrapper is observable because
+ // its wrapper is responsible for marking those event listeners.
+ if (node->isFiringEventListeners())
+ return true;
+
+ return false;
+}
+
+void markDOMNodesForDocument(MarkStack& markStack, Document* document)
+{
+ JSWrapperCacheMap& wrapperCacheMap = document->wrapperCacheMap();
+ for (JSWrapperCacheMap::iterator wrappersIter = wrapperCacheMap.begin(); wrappersIter != wrapperCacheMap.end(); ++wrappersIter) {
+ DOMWrapperWorld* world = wrappersIter->first;
+ JSWrapperCache* nodeDict = wrappersIter->second;
+
+ JSWrapperCache::iterator nodeEnd = nodeDict->uncheckedEnd();
+ for (JSWrapperCache::iterator nodeIt = nodeDict->uncheckedBegin(); nodeIt != nodeEnd; ++nodeIt) {
+ JSNode* jsNode = nodeIt->second;
+ if (isObservableThroughDOM(jsNode, world))
+ markStack.append(jsNode);
+ }
+ }
+}
+
+void markActiveObjectsForContext(MarkStack& markStack, JSGlobalData& globalData, ScriptExecutionContext* scriptExecutionContext)
+{
+ // If an element has pending activity that may result in event listeners being called
+ // (e.g. an XMLHttpRequest), we need to keep JS wrappers alive.
+
+ const HashMap<ActiveDOMObject*, void*>& activeObjects = scriptExecutionContext->activeDOMObjects();
+ HashMap<ActiveDOMObject*, void*>::const_iterator activeObjectsEnd = activeObjects.end();
+ for (HashMap<ActiveDOMObject*, void*>::const_iterator iter = activeObjects.begin(); iter != activeObjectsEnd; ++iter) {
+ if (iter->first->hasPendingActivity()) {
+ // Generally, an active object with pending activity must have a wrapper to mark its listeners.
+ // However, some ActiveDOMObjects don't have JS wrappers.
+ markDOMObjectWrapper(markStack, globalData, iter->second);
+ }
+ }
+
+ const HashSet<MessagePort*>& messagePorts = scriptExecutionContext->messagePorts();
+ HashSet<MessagePort*>::const_iterator portsEnd = messagePorts.end();
+ for (HashSet<MessagePort*>::const_iterator iter = messagePorts.begin(); iter != portsEnd; ++iter) {
+ // If the message port is remotely entangled, then always mark it as in-use because we can't determine reachability across threads.
+ if (!(*iter)->locallyEntangledPort() || (*iter)->hasPendingActivity())
+ markDOMObjectWrapper(markStack, globalData, *iter);
+ }
+}
+
+typedef std::pair<JSNode*, DOMWrapperWorld*> WrapperAndWorld;
+typedef WTF::Vector<WrapperAndWorld, 8> WrapperSet;
+
+static inline void takeWrappers(Node* node, Document* document, WrapperSet& wrapperSet)
+{
+ if (document) {
+ JSWrapperCacheMap& wrapperCacheMap = document->wrapperCacheMap();
+ for (JSWrapperCacheMap::iterator iter = wrapperCacheMap.begin(); iter != wrapperCacheMap.end(); ++iter) {
+ if (JSNode* wrapper = iter->second->take(node)) {
+ JSDebugWrapperSet::didUncacheWrapper(wrapper);
+ wrapperSet.append(WrapperAndWorld(wrapper, iter->first));
+ }
+ }
+ } else {
+ for (JSGlobalDataWorldIterator worldIter(JSDOMWindow::commonJSGlobalData()); worldIter; ++worldIter) {
+ DOMWrapperWorld* world = *worldIter;
+ if (JSNode* wrapper = static_cast<JSNode*>(world->m_wrappers.take(node))) {
+ JSDebugWrapperSet::didUncacheWrapper(wrapper);
+ wrapperSet.append(WrapperAndWorld(wrapper, world));
+ }
+ }
+ }
+}
+
+void updateDOMNodeDocument(Node* node, Document* oldDocument, Document* newDocument)
+{
+ ASSERT(oldDocument != newDocument);
+
+ WrapperSet wrapperSet;
+ takeWrappers(node, oldDocument, wrapperSet);
+
+ for (unsigned i = 0; i < wrapperSet.size(); ++i) {
+ JSNode* wrapper = wrapperSet[i].first;
+ JSDebugWrapperSet::willCacheWrapper(wrapper);
+ if (newDocument)
+ newDocument->getWrapperCache(wrapperSet[i].second)->set(node, wrapper);
+ else
+ wrapperSet[i].second->m_wrappers.set(node, wrapper);
+ }
+}
+
+void markDOMObjectWrapper(MarkStack& markStack, JSGlobalData& globalData, void* object)
+{
+ // FIXME: This could be changed to only mark wrappers that are "observable"
+ // as markDOMNodesForDocument does, allowing us to collect more wrappers,
+ // but doing this correctly would be challenging.
+ if (!object)
+ return;
+
+ for (JSGlobalDataWorldIterator worldIter(&globalData); worldIter; ++worldIter) {
+ if (DOMObject* wrapper = worldIter->m_wrappers.uncheckedGet(object))
+ markStack.append(wrapper);
+ }
+}
+
+void markDOMNodeWrapper(MarkStack& markStack, Document* document, Node* node)
+{
+ if (document) {
+ JSWrapperCacheMap& wrapperCacheMap = document->wrapperCacheMap();
+ for (JSWrapperCacheMap::iterator iter = wrapperCacheMap.begin(); iter != wrapperCacheMap.end(); ++iter) {
+ if (JSNode* wrapper = iter->second->uncheckedGet(node))
+ markStack.append(wrapper);
+ }
+ return;
+ }
+
+ for (JSGlobalDataWorldIterator worldIter(JSDOMWindow::commonJSGlobalData()); worldIter; ++worldIter) {
+ if (DOMObject* wrapper = worldIter->m_wrappers.uncheckedGet(node))
+ markStack.append(wrapper);
+ }
+}
+
+static void stringWrapperDestroyed(JSString* str, void* context)
+{
+ StringImpl* cacheKey = static_cast<StringImpl*>(context);
+ JSC::JSGlobalData* globalData = Heap::heap(str)->globalData();
+
+ // Check the normal world first!
+ JSGlobalData::ClientData* clientData = globalData->clientData;
+ ASSERT(clientData);
+ JSStringCache& cache = static_cast<WebCoreJSClientData*>(clientData)->normalWorld()->m_stringCache;
+ if (cache.uncheckedRemove(cacheKey, str)) {
+ cacheKey->deref();
+ return;
+ }
+
+ for (JSGlobalDataWorldIterator worldIter(globalData); worldIter; ++worldIter) {
+ if (worldIter->m_stringCache.uncheckedRemove(cacheKey, str))
+ break;
+ }
+
+ cacheKey->deref();
+}
+
+JSValue jsStringSlowCase(ExecState* exec, JSStringCache& stringCache, StringImpl* stringImpl)
+{
+ // If there is a stale entry, we have to explicitly remove it to avoid
+ // problems down the line.
+ if (JSString* wrapper = stringCache.uncheckedGet(stringImpl))
+ stringCache.uncheckedRemove(stringImpl, wrapper);
+
+ JSString* wrapper = jsStringWithFinalizer(exec, UString(stringImpl), stringWrapperDestroyed, stringImpl);
+ stringCache.set(stringImpl, wrapper);
+ // ref explicitly instead of using a RefPtr-keyed hashtable because the wrapper can
+ // outlive the cache, so the stringImpl has to match the wrapper's lifetime.
+ stringImpl->ref();
+ return wrapper;
+}
+
+JSValue jsStringOrNull(ExecState* exec, const String& s)
+{
+ if (s.isNull())
+ return jsNull();
+ return jsString(exec, s);
+}
+
+JSValue jsOwnedStringOrNull(ExecState* exec, const UString& s)
+{
+ if (s.isNull())
+ return jsNull();
+ return jsOwnedString(exec, s);
+}
+
+JSValue jsStringOrUndefined(ExecState* exec, const String& s)
+{
+ if (s.isNull())
+ return jsUndefined();
+ return jsString(exec, s);
+}
+
+JSValue jsStringOrFalse(ExecState* exec, const String& s)
+{
+ if (s.isNull())
+ return jsBoolean(false);
+ return jsString(exec, s);
+}
+
+JSValue jsString(ExecState* exec, const KURL& url)
+{
+ return jsString(exec, url.string());
+}
+
+JSValue jsStringOrNull(ExecState* exec, const KURL& url)
+{
+ if (url.isNull())
+ return jsNull();
+ return jsString(exec, url.string());
+}
+
+JSValue jsStringOrUndefined(ExecState* exec, const KURL& url)
+{
+ if (url.isNull())
+ return jsUndefined();
+ return jsString(exec, url.string());
+}
+
+JSValue jsStringOrFalse(ExecState* exec, const KURL& url)
+{
+ if (url.isNull())
+ return jsBoolean(false);
+ return jsString(exec, url.string());
+}
+
+AtomicStringImpl* findAtomicString(const Identifier& identifier)
+{
+ if (identifier.isNull())
+ return 0;
+ UStringImpl* impl = identifier.ustring().rep();
+ ASSERT(impl->existingHash());
+ return AtomicString::find(impl->characters(), impl->length(), impl->existingHash());
+}
+
+String valueToStringWithNullCheck(ExecState* exec, JSValue value)
+{
+ if (value.isNull())
+ return String();
+ return ustringToString(value.toString(exec));
+}
+
+String valueToStringWithUndefinedOrNullCheck(ExecState* exec, JSValue value)
+{
+ if (value.isUndefinedOrNull())
+ return String();
+ return ustringToString(value.toString(exec));
+}
+
+JSValue jsDateOrNull(ExecState* exec, double value)
+{
+ if (!isfinite(value))
+ return jsNull();
+ return new (exec) DateInstance(exec, value);
+}
+
+double valueToDate(ExecState* exec, JSValue value)
+{
+ if (value.isNumber())
+ return value.uncheckedGetNumber();
+ if (!value.inherits(&DateInstance::info))
+ return std::numeric_limits<double>::quiet_NaN();
+ return static_cast<DateInstance*>(value.toObject(exec))->internalNumber();
+}
+
+void reportException(ExecState* exec, JSValue exception)
+{
+ if (exception.isObject() && asObject(exception)->exceptionType() == Terminated)
+ return;
+
+ UString errorMessage = exception.toString(exec);
+ JSObject* exceptionObject = exception.toObject(exec);
+ int lineNumber = exceptionObject->get(exec, Identifier(exec, "line")).toInt32(exec);
+ UString exceptionSourceURL = exceptionObject->get(exec, Identifier(exec, "sourceURL")).toString(exec);
+ exec->clearException();
+
+ if (ExceptionBase* exceptionBase = toExceptionBase(exception))
+ errorMessage = stringToUString(exceptionBase->message() + ": " + exceptionBase->description());
+
+ ScriptExecutionContext* scriptExecutionContext = static_cast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
+ ASSERT(scriptExecutionContext);
+
+ // Crash data indicates null-dereference crashes at this point in the Safari 4 Public Beta.
+ // It's harmless to return here without reporting the exception to the log and the debugger in this case.
+ if (!scriptExecutionContext)
+ return;
+
+ scriptExecutionContext->reportException(ustringToString(errorMessage), lineNumber, ustringToString(exceptionSourceURL));
+}
+
+void reportCurrentException(ExecState* exec)
+{
+ JSValue exception = exec->exception();
+ exec->clearException();
+ reportException(exec, exception);
+}
+
+void setDOMException(ExecState* exec, ExceptionCode ec)
+{
+ if (!ec || exec->hadException())
+ return;
+
+ // FIXME: All callers to setDOMException need to pass in the right global object
+ // for now, we're going to assume the lexicalGlobalObject. Which is wrong in cases like this:
+ // frames[0].document.createElement(null, null); // throws an exception which should have the subframes prototypes.
+ JSDOMGlobalObject* globalObject = deprecatedGlobalObjectForPrototype(exec);
+
+ ExceptionCodeDescription description;
+ getExceptionCodeDescription(ec, description);
+
+ JSValue errorObject;
+ switch (description.type) {
+ case DOMExceptionType:
+ errorObject = toJS(exec, globalObject, DOMCoreException::create(description));
+ break;
+ case RangeExceptionType:
+ errorObject = toJS(exec, globalObject, RangeException::create(description));
+ break;
+ case EventExceptionType:
+ errorObject = toJS(exec, globalObject, EventException::create(description));
+ break;
+ case XMLHttpRequestExceptionType:
+ errorObject = toJS(exec, globalObject, XMLHttpRequestException::create(description));
+ break;
+#if ENABLE(SVG)
+ case SVGExceptionType:
+ errorObject = toJS(exec, globalObject, SVGException::create(description).get(), 0 /* no context on purpose */);
+ break;
+#endif
+#if ENABLE(XPATH)
+ case XPathExceptionType:
+ errorObject = toJS(exec, globalObject, XPathException::create(description));
+ break;
+#endif
+#if ENABLE(DATABASE)
+ case SQLExceptionType:
+ errorObject = toJS(exec, globalObject, SQLException::create(description));
+ break;
+#endif
+ }
+
+ ASSERT(errorObject);
+ throwError(exec, errorObject);
+}
+
+bool checkNodeSecurity(ExecState* exec, Node* node)
+{
+ return node && allowsAccessFromFrame(exec, node->document()->frame());
+}
+
+bool allowsAccessFromFrame(ExecState* exec, Frame* frame)
+{
+ if (!frame)
+ return false;
+ JSDOMWindow* window = toJSDOMWindow(frame, currentWorld(exec));
+ return window && window->allowsAccessFrom(exec);
+}
+
+bool allowsAccessFromFrame(ExecState* exec, Frame* frame, String& message)
+{
+ if (!frame)
+ return false;
+ JSDOMWindow* window = toJSDOMWindow(frame, currentWorld(exec));
+ return window && window->allowsAccessFrom(exec, message);
+}
+
+bool shouldAllowNavigation(ExecState* exec, Frame* frame)
+{
+ Frame* lexicalFrame = toLexicalFrame(exec);
+ return lexicalFrame && lexicalFrame->loader()->shouldAllowNavigation(frame);
+}
+
+bool allowSettingSrcToJavascriptURL(ExecState* exec, Element* element, const String& name, const String& value)
+{
+ if ((element->hasTagName(iframeTag) || element->hasTagName(frameTag)) && equalIgnoringCase(name, "src") && protocolIsJavaScript(deprecatedParseURL(value))) {
+ Document* contentDocument = static_cast<HTMLFrameElementBase*>(element)->contentDocument();
+ if (contentDocument && !checkNodeSecurity(exec, contentDocument))
+ return false;
+ }
+ return true;
+}
+
+void printErrorMessageForFrame(Frame* frame, const String& message)
+{
+ if (!frame)
+ return;
+ if (message.isEmpty())
+ return;
+
+ Settings* settings = frame->settings();
+ if (!settings)
+ return;
+ if (settings->privateBrowsingEnabled())
+ return;
+
+ frame->domWindow()->console()->addMessage(JSMessageSource, LogMessageType, ErrorMessageLevel, message, 1, String()); // FIXME: provide a real line number and source URL.
+}
+
+Frame* toLexicalFrame(ExecState* exec)
+{
+ return asJSDOMWindow(exec->lexicalGlobalObject())->impl()->frame();
+}
+
+Frame* toDynamicFrame(ExecState* exec)
+{
+ return asJSDOMWindow(exec->dynamicGlobalObject())->impl()->frame();
+}
+
+bool processingUserGesture(ExecState* exec)
+{
+ Frame* frame = toDynamicFrame(exec);
+ return frame && frame->script()->processingUserGesture(currentWorld(exec));
+}
+
+KURL completeURL(ExecState* exec, const String& relativeURL)
+{
+ // For historical reasons, we need to complete the URL using the dynamic frame.
+ Frame* frame = toDynamicFrame(exec);
+ if (!frame)
+ return KURL();
+ return frame->loader()->completeURL(relativeURL);
+}
+
+JSValue objectToStringFunctionGetter(ExecState* exec, JSValue, const Identifier& propertyName)
+{
+ return new (exec) NativeFunctionWrapper(exec, exec->lexicalGlobalObject(), exec->lexicalGlobalObject()->prototypeFunctionStructure(), 0, propertyName, objectProtoFuncToString);
+}
+
+Structure* getCachedDOMStructure(JSDOMGlobalObject* globalObject, const ClassInfo* classInfo)
+{
+ JSDOMStructureMap& structures = globalObject->structures();
+ return structures.get(classInfo).get();
+}
+
+Structure* cacheDOMStructure(JSDOMGlobalObject* globalObject, NonNullPassRefPtr<Structure> structure, const ClassInfo* classInfo)
+{
+ JSDOMStructureMap& structures = globalObject->structures();
+ ASSERT(!structures.contains(classInfo));
+ return structures.set(classInfo, structure).first->second.get();
+}
+
+Structure* getCachedDOMStructure(ExecState* exec, const ClassInfo* classInfo)
+{
+ return getCachedDOMStructure(static_cast<JSDOMGlobalObject*>(exec->lexicalGlobalObject()), classInfo);
+}
+
+Structure* cacheDOMStructure(ExecState* exec, NonNullPassRefPtr<Structure> structure, const ClassInfo* classInfo)
+{
+ return cacheDOMStructure(static_cast<JSDOMGlobalObject*>(exec->lexicalGlobalObject()), structure, classInfo);
+}
+
+JSObject* getCachedDOMConstructor(ExecState* exec, const ClassInfo* classInfo)
+{
+ JSDOMConstructorMap& constructors = static_cast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->constructors();
+ return constructors.get(classInfo);
+}
+
+void cacheDOMConstructor(ExecState* exec, const ClassInfo* classInfo, JSObject* constructor)
+{
+ JSDOMConstructorMap& constructors = static_cast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->constructors();
+ ASSERT(!constructors.contains(classInfo));
+ constructors.set(classInfo, constructor);
+}
+
+JSC::JSObject* toJSSequence(ExecState* exec, JSValue value, unsigned& length)
+{
+ JSObject* object = value.getObject();
+ if (!object) {
+ throwTypeError(exec);
+ return 0;
+ }
+ JSValue lengthValue = object->get(exec, exec->propertyNames().length);
+ if (exec->hadException())
+ return 0;
+
+ if (lengthValue.isUndefinedOrNull()) {
+ throwTypeError(exec);
+ return 0;
+ }
+
+ length = lengthValue.toUInt32(exec);
+ if (exec->hadException())
+ return 0;
+
+ return object;
+}
+
+} // namespace WebCore