1/*
2 * Copyright (C) 2008-2018 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of Apple Inc. ("Apple") nor the names of
14 * its contributors may be used to endorse or promote products derived
15 * from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
18 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
20 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
21 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
23 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#include "config.h"
30#include "JSWindowProxy.h"
31
32#include "AbstractFrame.h"
33#include "CommonVM.h"
34#include "GCController.h"
35#include "JSDOMWindow.h"
36#include "JSDOMWindowProperties.h"
37#include "JSEventTarget.h"
38#include "JSRemoteDOMWindow.h"
39#include "ScriptController.h"
40#include <JavaScriptCore/Debugger.h>
41#include <JavaScriptCore/JSObject.h>
42#include <JavaScriptCore/StrongInlines.h>
43
44namespace WebCore {
45
46using namespace JSC;
47
48const ClassInfo JSWindowProxy::s_info = { "JSWindowProxy", &Base::s_info, nullptr, nullptr, CREATE_METHOD_TABLE(JSWindowProxy) };
49
50inline JSWindowProxy::JSWindowProxy(VM& vm, Structure& structure, DOMWrapperWorld& world)
51 : Base(vm, &structure)
52 , m_world(world)
53{
54}
55
56void JSWindowProxy::finishCreation(VM& vm, AbstractDOMWindow& window)
57{
58 Base::finishCreation(vm);
59 ASSERT(inherits(vm, info()));
60 setWindow(window);
61}
62
63JSWindowProxy& JSWindowProxy::create(VM& vm, AbstractDOMWindow& window, DOMWrapperWorld& world)
64{
65 auto& structure = *Structure::create(vm, 0, jsNull(), TypeInfo(PureForwardingProxyType, StructureFlags), info());
66 auto& proxy = *new (NotNull, allocateCell<JSWindowProxy>(vm.heap)) JSWindowProxy(vm, structure, world);
67 proxy.finishCreation(vm, window);
68 return proxy;
69}
70
71void JSWindowProxy::destroy(JSCell* cell)
72{
73 static_cast<JSWindowProxy*>(cell)->JSWindowProxy::~JSWindowProxy();
74}
75
76void JSWindowProxy::setWindow(VM& vm, JSDOMGlobalObject& window)
77{
78 ASSERT(window.classInfo() == JSDOMWindow::info() || window.classInfo() == JSRemoteDOMWindow::info());
79 setTarget(vm, &window);
80 structure(vm)->setGlobalObject(vm, &window);
81 GCController::singleton().garbageCollectSoon();
82}
83
84void JSWindowProxy::setWindow(AbstractDOMWindow& domWindow)
85{
86 // Replacing JSDOMWindow via telling JSWindowProxy to use the same DOMWindow it already uses makes no sense,
87 // so we'd better never try to.
88 ASSERT(!window() || &domWindow != &wrapped());
89
90 bool isRemoteDOMWindow = is<RemoteDOMWindow>(domWindow);
91
92 VM& vm = commonVM();
93 auto& prototypeStructure = isRemoteDOMWindow ? *JSRemoteDOMWindowPrototype::createStructure(vm, nullptr, jsNull()) : *JSDOMWindowPrototype::createStructure(vm, nullptr, jsNull());
94
95 // Explicitly protect the prototype so it isn't collected when we allocate the global object.
96 // (Once the global object is fully constructed, it will mark its own prototype.)
97 // FIXME: Why do we need to protect this when there's a pointer to it on the stack?
98 // Perhaps the issue is that structure objects aren't seen when scanning the stack?
99 Strong<JSNonFinalObject> prototype(vm, isRemoteDOMWindow ? static_cast<JSNonFinalObject*>(JSRemoteDOMWindowPrototype::create(vm, nullptr, &prototypeStructure)) : static_cast<JSNonFinalObject*>(JSDOMWindowPrototype::create(vm, nullptr, &prototypeStructure)));
100
101 JSDOMGlobalObject* window = nullptr;
102 if (isRemoteDOMWindow) {
103 auto& windowStructure = *JSRemoteDOMWindow::createStructure(vm, nullptr, prototype.get());
104 window = JSRemoteDOMWindow::create(vm, &windowStructure, downcast<RemoteDOMWindow>(domWindow), this);
105 } else {
106 auto& windowStructure = *JSDOMWindow::createStructure(vm, nullptr, prototype.get());
107 window = JSDOMWindow::create(vm, &windowStructure, downcast<DOMWindow>(domWindow), this);
108 }
109
110 prototype->structure(vm)->setGlobalObject(vm, window);
111
112 auto& propertiesStructure = *JSDOMWindowProperties::createStructure(vm, window, JSEventTarget::prototype(vm, *window));
113 auto& properties = *JSDOMWindowProperties::create(&propertiesStructure, *window);
114 prototype->structure(vm)->setPrototypeWithoutTransition(vm, &properties);
115
116 setWindow(vm, *window);
117
118 ASSERT(window->globalObject() == window);
119 ASSERT(prototype->globalObject() == window);
120}
121
122WindowProxy* JSWindowProxy::windowProxy() const
123{
124 auto& window = wrapped();
125 return window.frame() ? &window.frame()->windowProxy() : nullptr;
126}
127
128void JSWindowProxy::attachDebugger(JSC::Debugger* debugger)
129{
130 auto* globalObject = window();
131 JSLockHolder lock(globalObject->vm());
132
133 if (debugger)
134 debugger->attach(globalObject);
135 else if (auto* currentDebugger = globalObject->debugger())
136 currentDebugger->detach(globalObject, JSC::Debugger::TerminatingDebuggingSession);
137}
138
139AbstractDOMWindow& JSWindowProxy::wrapped() const
140{
141 auto* window = this->window();
142 if (auto* jsWindow = jsDynamicCast<JSRemoteDOMWindowBase*>(window->vm(), window))
143 return jsWindow->wrapped();
144 return jsCast<JSDOMWindowBase*>(window)->wrapped();
145}
146
147JSValue toJS(ExecState* state, WindowProxy& windowProxy)
148{
149 auto* jsWindowProxy = windowProxy.jsWindowProxy(currentWorld(*state));
150 return jsWindowProxy ? JSValue(jsWindowProxy) : jsNull();
151}
152
153JSWindowProxy* toJSWindowProxy(WindowProxy& windowProxy, DOMWrapperWorld& world)
154{
155 return windowProxy.jsWindowProxy(world);
156}
157
158WindowProxy* JSWindowProxy::toWrapped(VM& vm, JSValue value)
159{
160 if (!value.isObject())
161 return nullptr;
162 JSObject* object = asObject(value);
163 if (object->inherits<JSWindowProxy>(vm))
164 return jsCast<JSWindowProxy*>(object)->windowProxy();
165 return nullptr;
166}
167
168} // namespace WebCore
169