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/*
* Copyright (C) 2007, 2008 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 "JSDOMWindow.h"
#include "AtomicString.h"
#include "DOMWindow.h"
#include "Document.h"
#include "ExceptionCode.h"
#include "Frame.h"
#include "FrameLoader.h"
#include "FrameTree.h"
#include "kjs_window.h"
#include <kjs/object.h>
using namespace KJS;
namespace WebCore {
bool JSDOMWindow::customGetOwnPropertySlot(ExecState* exec, const Identifier& propertyName, 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 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 = Lookup::findEntry(info.propHashTable, propertyName);
if (entry && !(entry->attr & Function) && entry->value.intValue == ClosedAttrNum) {
slot.setStaticEntry(this, entry, staticValueGetter<JSDOMWindow>);
return true;
}
entry = Lookup::findEntry(JSDOMWindowPrototype::info.propHashTable, propertyName);
if (entry && (entry->attr & Function) && entry->value.functionValue == jsDOMWindowPrototypeFunctionClose) {
slot.setStaticEntry(this, entry, nonCachingStaticFunctionGetter);
return true;
}
// FIXME: We should have a message here that explains why the property access/function call was
// not allowed.
slot.setUndefined(this);
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 KJS::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 = Lookup::findEntry(JSDOMWindowPrototype::info.propHashTable, propertyName);
if (entry) {
if ((entry->attr & Function)
&& (entry->value.functionValue == jsDOMWindowPrototypeFunctionBlur
|| entry->value.functionValue == jsDOMWindowPrototypeFunctionClose
|| entry->value.functionValue == jsDOMWindowPrototypeFunctionFocus
#if ENABLE(CROSS_DOCUMENT_MESSAGING)
|| entry->value.functionValue == jsDOMWindowPrototypeFunctionPostMessage
#endif
)) {
if (!allowsAccess) {
slot.setStaticEntry(this, entry, nonCachingStaticFunctionGetter);
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;
}
bool JSDOMWindow::customPut(ExecState* exec, const Identifier& propertyName, JSValue* value)
{
if (!impl()->frame())
return true;
// We have a local override (e.g. "var location"), save time and jump directly to JSGlobalObject.
PropertySlot slot;
if (JSGlobalObject::getOwnPropertySlot(exec, propertyName, slot)) {
if (allowsAccessFrom(exec))
JSGlobalObject::put(exec, propertyName, value);
return true;
}
return false;
}
bool JSDOMWindow::deleteProperty(ExecState* exec, const Identifier& propertyName)
{
// Only allow deleting properties by frames in the same origin.
if (!allowsAccessFrom(exec))
return false;
return Base::deleteProperty(exec, propertyName);
}
bool JSDOMWindow::customGetPropertyNames(ExecState* exec, PropertyNameArray&)
{
// Only allow the window to enumerated by frames in the same origin.
if (!allowsAccessFrom(exec))
return true;
return false;
}
#if ENABLE(CROSS_DOCUMENT_MESSAGING)
JSValue* JSDOMWindow::postMessage(ExecState* exec, const List& args)
{
DOMWindow* window = impl();
DOMWindow* source = static_cast<JSDOMWindow*>(exec->dynamicGlobalObject())->impl();
String domain = source->frame()->loader()->url().host();
String uri = source->frame()->loader()->url().string();
String message = args[0]->toString(exec);
if (exec->hadException())
return jsUndefined();
window->postMessage(message, domain, uri, source);
return jsUndefined();
}
#endif
} // namespace WebCore
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