gecko/dom/base/WindowNamedPropertiesHandler.cpp

182 lines
5.7 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=2 sw=2 et tw=78: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "WindowNamedPropertiesHandler.h"
#include "nsDOMClassInfo.h"
#include "nsGlobalWindow.h"
#include "nsHTMLDocument.h"
#include "nsJSUtils.h"
#include "xpcprivate.h"
namespace mozilla {
namespace dom {
bool
WindowNamedPropertiesHandler::getOwnPropertyDescriptor(JSContext* aCx,
JS::Handle<JSObject*> aProxy,
JS::Handle<jsid> aId,
JS::MutableHandle<JSPropertyDescriptor> aDesc,
unsigned aFlags)
{
if (!JSID_IS_STRING(aId)) {
// Nothing to do if we're resolving a non-string property.
return true;
}
JSObject* global = JS_GetGlobalForObject(aCx, aProxy);
nsresult rv =
nsDOMClassInfo::ScriptSecurityManager()->CheckPropertyAccess(aCx, global,
"Window", aId,
nsIXPCSecurityManager::ACCESS_GET_PROPERTY);
if (NS_FAILED(rv)) {
// The security check failed. The security manager set a JS exception for
// us.
return false;
}
if (HasPropertyOnPrototype(aCx, aProxy, aId)) {
return true;
}
nsDependentJSString str(aId);
// Grab the DOM window.
XPCWrappedNative* wrapper = XPCWrappedNative::Get(global);
nsCOMPtr<nsPIDOMWindow> piWin = do_QueryWrappedNative(wrapper);
MOZ_ASSERT(piWin);
nsGlobalWindow* win = static_cast<nsGlobalWindow*>(piWin.get());
if (win->GetLength() > 0) {
nsCOMPtr<nsIDOMWindow> childWin = win->GetChildWindow(str);
if (childWin) {
// We found a subframe of the right name. Shadowing via |var foo| in
// global scope is still allowed, since |var| only looks up |own|
// properties. But unqualified shadowing will fail, per-spec.
JS::Rooted<JS::Value> v(aCx);
if (!WrapObject(aCx, aProxy, childWin, &v)) {
return false;
}
aDesc.object().set(aProxy);
aDesc.value().set(v);
aDesc.setAttributes(JSPROP_ENUMERATE);
return true;
}
}
// The rest of this function is for HTML documents only.
nsCOMPtr<nsIHTMLDocument> htmlDoc = do_QueryInterface(win->GetExtantDoc());
if (!htmlDoc) {
return true;
}
nsHTMLDocument* document = static_cast<nsHTMLDocument*>(htmlDoc.get());
Element* element = document->GetElementById(str);
if (element) {
JS::Rooted<JS::Value> v(aCx);
if (!WrapObject(aCx, aProxy, element, &v)) {
return false;
}
aDesc.object().set(aProxy);
aDesc.value().set(v);
aDesc.setAttributes(JSPROP_ENUMERATE);
return true;
}
nsWrapperCache* cache;
nsISupports* result = document->ResolveName(str, &cache);
if (!result) {
return true;
}
JS::Rooted<JS::Value> v(aCx);
if (!WrapObject(aCx, aProxy, result, cache, nullptr, &v)) {
return false;
}
aDesc.object().set(aProxy);
aDesc.value().set(v);
aDesc.setAttributes(JSPROP_ENUMERATE);
return true;
}
bool
WindowNamedPropertiesHandler::defineProperty(JSContext* aCx,
JS::Handle<JSObject*> aProxy,
JS::Handle<jsid> aId,
JS::MutableHandle<JSPropertyDescriptor> aDesc)
{
ErrorResult rv;
rv.ThrowTypeError(MSG_DEFINEPROPERTY_ON_GSP);
rv.ReportTypeError(aCx);
return false;
}
bool
WindowNamedPropertiesHandler::getOwnPropertyNames(JSContext* aCx,
JS::Handle<JSObject*> aProxy,
JS::AutoIdVector& aProps)
{
// Grab the DOM window.
JSObject* global = JS_GetGlobalForObject(aCx, aProxy);
XPCWrappedNative* wrapper = XPCWrappedNative::Get(global);
nsCOMPtr<nsPIDOMWindow> piWin = do_QueryWrappedNative(wrapper);
MOZ_ASSERT(piWin);
nsGlobalWindow* win = static_cast<nsGlobalWindow*>(piWin.get());
nsTArray<nsString> names;
win->GetSupportedNames(names);
if (!AppendNamedPropertyIds(aCx, aProxy, names, false, aProps)) {
return false;
}
names.Clear();
nsCOMPtr<nsIHTMLDocument> htmlDoc = do_QueryInterface(win->GetExtantDoc());
if (!htmlDoc) {
return true;
}
nsHTMLDocument* document = static_cast<nsHTMLDocument*>(htmlDoc.get());
document->GetSupportedNames(names);
JS::AutoIdVector docProps(aCx);
if (!AppendNamedPropertyIds(aCx, aProxy, names, false, docProps)) {
return false;
}
return js::AppendUnique(aCx, aProps, docProps);
}
bool
WindowNamedPropertiesHandler::delete_(JSContext* aCx,
JS::Handle<JSObject*> aProxy,
JS::Handle<jsid> aId, bool* aBp)
{
*aBp = false;
return true;
}
// static
void
WindowNamedPropertiesHandler::Install(JSContext* aCx,
JS::Handle<JSObject*> aProto)
{
JS::Rooted<JSObject*> protoProto(aCx);
if (!::JS_GetPrototype(aCx, aProto, &protoProto)) {
return;
}
JS::Rooted<JSObject*> gsp(aCx);
gsp = js::NewProxyObject(aCx, WindowNamedPropertiesHandler::getInstance(),
JS::NullHandleValue, protoProto,
js::GetGlobalForObjectCrossCompartment(aProto));
if (!gsp) {
return;
}
// And then set the prototype of the interface prototype object to be the
// global scope polluter.
::JS_SplicePrototype(aCx, aProto, gsp);
}
} // namespace dom
} // namespace mozilla