1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
2 * vim: set ts=8 sts=2 et sw=2 tw=80:
3 * This Source Code Form is subject to the terms of the Mozilla Public
4 * License, v. 2.0. If a copy of the MPL was not distributed with this
5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
6
7 /* WindowProxy and Window implementation, for the web browser embedding. */
8
9 #include "js/friend/WindowProxy.h"
10
11 #include "mozilla/Assertions.h" // MOZ_ASSERT
12
13 #include "jsapi.h" // js::AssertHeapIsIdle
14
15 #include "vm/GlobalObject.h" // js::GlobalObject
16 #include "vm/JSContext.h" // JSContext, CHECK_THREAD
17 #include "vm/JSObject.h" // JSObject
18 #include "vm/Runtime.h" // JSRuntime
19
20 #include "vm/JSContext-inl.h" // JSContext::check
21 #include "vm/JSObject-inl.h" // JSObject::nonCCWGlobal
22
23 using JS::Handle;
24
SetWindowProxyClass(JSContext * cx,const JSClass * clasp)25 void js::SetWindowProxyClass(JSContext* cx, const JSClass* clasp) {
26 MOZ_ASSERT(!cx->runtime()->maybeWindowProxyClass());
27 cx->runtime()->setWindowProxyClass(clasp);
28 }
29
SetWindowProxy(JSContext * cx,Handle<JSObject * > global,Handle<JSObject * > windowProxy)30 void js::SetWindowProxy(JSContext* cx, Handle<JSObject*> global,
31 Handle<JSObject*> windowProxy) {
32 AssertHeapIsIdle();
33 CHECK_THREAD(cx);
34
35 cx->check(global, windowProxy);
36 MOZ_ASSERT(IsWindowProxy(windowProxy));
37
38 GlobalObject& globalObj = global->as<GlobalObject>();
39 globalObj.setWindowProxy(windowProxy);
40 globalObj.lexicalEnvironment().setWindowProxyThisObject(windowProxy);
41 }
42
ToWindowIfWindowProxy(JSObject * obj)43 JSObject* js::ToWindowIfWindowProxy(JSObject* obj) {
44 if (IsWindowProxy(obj)) {
45 return &obj->nonCCWGlobal();
46 }
47
48 return obj;
49 }
50
ToWindowProxyIfWindowSlow(JSObject * obj)51 JSObject* js::detail::ToWindowProxyIfWindowSlow(JSObject* obj) {
52 if (JSObject* windowProxy = obj->as<GlobalObject>().maybeWindowProxy()) {
53 return windowProxy;
54 }
55
56 return obj;
57 }
58
IsWindowProxy(JSObject * obj)59 bool js::IsWindowProxy(JSObject* obj) {
60 // Note: simply checking `obj == obj->global().windowProxy()` is not
61 // sufficient: we may have transplanted the window proxy with a CCW.
62 // Check the Class to ensure we really have a window proxy.
63 return obj->getClass() ==
64 obj->runtimeFromAnyThread()->maybeWindowProxyClass();
65 }
66
IsWindowSlow(JSObject * obj)67 bool js::detail::IsWindowSlow(JSObject* obj) {
68 return obj->as<GlobalObject>().maybeWindowProxy();
69 }
70