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/*
* Copyright (C) 2008 Apple Inc. All rights reseved.
*
* 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
*/
#ifndef JSDOMWindowCustom_h
#define JSDOMWindowCustom_h
#include "JSDOMWindow.h"
#include "JSDOMWindowShell.h"
#include <wtf/AlwaysInline.h>
namespace WebCore {
inline JSDOMWindow* asJSDOMWindow(JSC::JSGlobalObject* globalObject)
{
return static_cast<JSDOMWindow*>(globalObject);
}
inline const JSDOMWindow* asJSDOMWindow(const JSC::JSGlobalObject* globalObject)
{
return static_cast<const JSDOMWindow*>(globalObject);
}
JSC::JSValuePtr nonCachingStaticCloseFunctionGetter(JSC::ExecState*, const JSC::Identifier&, const JSC::PropertySlot&);
JSC::JSValuePtr nonCachingStaticBlurFunctionGetter(JSC::ExecState*, const JSC::Identifier&, const JSC::PropertySlot&);
JSC::JSValuePtr nonCachingStaticFocusFunctionGetter(JSC::ExecState*, const JSC::Identifier&, const JSC::PropertySlot&);
JSC::JSValuePtr nonCachingStaticPostMessageFunctionGetter(JSC::ExecState*, const JSC::Identifier&, const JSC::PropertySlot&);
ALWAYS_INLINE bool JSDOMWindow::customGetOwnPropertySlot(JSC::ExecState* exec, const JSC::Identifier& propertyName, JSC::PropertySlot& slot)
{
// When accessing a Window cross-domain, functions are always the native built-in ones, and they
// are not affected by properties changed on the Window or anything in its prototype chain.
// This is consistent with the behavior of Firefox.
const JSC::HashEntry* entry;
// We don't want any properties other than "close" and "closed" on a closed window.
if (!impl()->frame()) {
// The following code is safe for cross-domain and same domain use.
// It ignores any custom properties that might be set on the DOMWindow (including a custom prototype).
entry = s_info.propHashTable(exec)->entry(exec, propertyName);
if (entry && !(entry->attributes() & JSC::Function) && entry->propertyGetter() == jsDOMWindowClosed) {
slot.setCustom(this, entry->propertyGetter());
return true;
}
entry = JSDOMWindowPrototype::s_info.propHashTable(exec)->entry(exec, propertyName);
if (entry && (entry->attributes() & JSC::Function) && entry->function() == jsDOMWindowPrototypeFunctionClose) {
slot.setCustom(this, nonCachingStaticCloseFunctionGetter);
return true;
}
// FIXME: We should have a message here that explains why the property access/function call was
// not allowed.
slot.setUndefined();
return true;
}
// We need to check for cross-domain access here without printing the generic warning message
// because we always allow access to some function, just different ones depending whether access
// is allowed.
bool allowsAccess = allowsAccessFromNoErrorMessage(exec);
// Look for overrides before looking at any of our own properties.
if (JSGlobalObject::getOwnPropertySlot(exec, propertyName, slot)) {
// But ignore overrides completely if this is cross-domain access.
if (allowsAccess)
return true;
}
// We need this code here because otherwise JSC::Window will stop the search before we even get to the
// prototype due to the blanket same origin (allowsAccessFrom) check at the end of getOwnPropertySlot.
// Also, it's important to get the implementation straight out of the DOMWindow prototype regardless of
// what prototype is actually set on this object.
entry = JSDOMWindowPrototype::s_info.propHashTable(exec)->entry(exec, propertyName);
if (entry) {
if (entry->attributes() & JSC::Function) {
if (entry->function() == jsDOMWindowPrototypeFunctionBlur) {
if (!allowsAccess) {
slot.setCustom(this, nonCachingStaticBlurFunctionGetter);
return true;
}
} else if (entry->function() == jsDOMWindowPrototypeFunctionClose) {
if (!allowsAccess) {
slot.setCustom(this, nonCachingStaticCloseFunctionGetter);
return true;
}
} else if (entry->function() == jsDOMWindowPrototypeFunctionFocus) {
if (!allowsAccess) {
slot.setCustom(this, nonCachingStaticFocusFunctionGetter);
return true;
}
} else if (entry->function() == jsDOMWindowPrototypeFunctionPostMessage) {
if (!allowsAccess) {
slot.setCustom(this, nonCachingStaticPostMessageFunctionGetter);
return true;
}
}
}
} else {
// Allow access to toString() cross-domain, but always Object.prototype.toString.
if (propertyName == exec->propertyNames().toString) {
if (!allowsAccess) {
slot.setCustom(this, objectToStringFunctionGetter);
return true;
}
}
}
return false;
}
inline bool JSDOMWindow::customPut(JSC::ExecState* exec, const JSC::Identifier& propertyName, JSC::JSValuePtr value, JSC::PutPropertySlot& slot)
{
if (!impl()->frame())
return true;
// We have a local override (e.g. "var location"), save time and jump directly to JSGlobalObject.
JSC::PropertySlot getSlot;
bool slotIsWriteable;
if (JSGlobalObject::getOwnPropertySlot(exec, propertyName, getSlot, slotIsWriteable)) {
if (allowsAccessFrom(exec)) {
if (slotIsWriteable) {
getSlot.putValue(value);
if (getSlot.isCacheable())
slot.setExistingProperty(this, getSlot.cachedOffset());
} else
JSGlobalObject::put(exec, propertyName, value, slot);
}
return true;
}
return false;
}
inline bool JSDOMWindowBase::allowsAccessFrom(const JSGlobalObject* other) const
{
if (allowsAccessFromPrivate(other))
return true;
printErrorMessage(crossDomainAccessErrorMessage(other));
return false;
}
inline bool JSDOMWindowBase::allowsAccessFrom(JSC::ExecState* exec) const
{
if (allowsAccessFromPrivate(exec->lexicalGlobalObject()))
return true;
printErrorMessage(crossDomainAccessErrorMessage(exec->lexicalGlobalObject()));
return false;
}
inline bool JSDOMWindowBase::allowsAccessFromNoErrorMessage(JSC::ExecState* exec) const
{
return allowsAccessFromPrivate(exec->lexicalGlobalObject());
}
inline bool JSDOMWindowBase::allowsAccessFrom(JSC::ExecState* exec, String& message) const
{
if (allowsAccessFromPrivate(exec->lexicalGlobalObject()))
return true;
message = crossDomainAccessErrorMessage(exec->lexicalGlobalObject());
return false;
}
ALWAYS_INLINE bool JSDOMWindowBase::allowsAccessFromPrivate(const JSGlobalObject* other) const
{
const JSDOMWindow* originWindow = asJSDOMWindow(other);
const JSDOMWindow* targetWindow = d()->shell->window();
if (originWindow == targetWindow)
return true;
// JS may be attempting to access the "window" object, which should be valid,
// even if the document hasn't been constructed yet. If the document doesn't
// exist yet allow JS to access the window object.
if (!originWindow->impl()->document())
return true;
const SecurityOrigin* originSecurityOrigin = originWindow->impl()->securityOrigin();
const SecurityOrigin* targetSecurityOrigin = targetWindow->impl()->securityOrigin();
return originSecurityOrigin->canAccess(targetSecurityOrigin);
}
}
#endif // JSDOMWindowCustom_h
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