/*
* 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