68 lines
2.5 KiB
C++
68 lines
2.5 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef _xpc_WRAPPERFACTORY_H
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#define _xpc_WRAPPERFACTORY_H
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#include "jswrapper.h"
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namespace xpc {
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class WrapperFactory {
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public:
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enum { WAIVE_XRAY_WRAPPER_FLAG = js::Wrapper::LAST_USED_FLAG << 1,
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IS_XRAY_WRAPPER_FLAG = WAIVE_XRAY_WRAPPER_FLAG << 1 };
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// Return true if any of any of the nested wrappers have the flag set.
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static bool HasWrapperFlag(JSObject* wrapper, unsigned flag) {
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unsigned flags = 0;
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js::UncheckedUnwrap(wrapper, true, &flags);
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return !!(flags & flag);
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}
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static bool IsXrayWrapper(JSObject* wrapper) {
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return HasWrapperFlag(wrapper, IS_XRAY_WRAPPER_FLAG);
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}
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static bool HasWaiveXrayFlag(JSObject* wrapper) {
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return HasWrapperFlag(wrapper, WAIVE_XRAY_WRAPPER_FLAG);
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}
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static bool IsCOW(JSObject* wrapper);
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static JSObject* GetXrayWaiver(JS::HandleObject obj);
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static JSObject* CreateXrayWaiver(JSContext* cx, JS::HandleObject obj);
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static JSObject* WaiveXray(JSContext* cx, JSObject* obj);
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// Computes whether we should allow the creation of an Xray waiver from
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// |target| to |origin|.
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static bool AllowWaiver(JSCompartment* target, JSCompartment* origin);
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// Convenience method for the above, operating on a wrapper.
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static bool AllowWaiver(JSObject* wrapper);
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// Prepare a given object for wrapping in a new compartment.
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static void PrepareForWrapping(JSContext* cx,
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JS::HandleObject scope,
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JS::HandleObject obj,
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JS::HandleObject objectPassedToWrap,
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JS::MutableHandleObject retObj);
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// Rewrap an object that is about to cross compartment boundaries.
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static JSObject* Rewrap(JSContext* cx,
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JS::HandleObject existing,
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JS::HandleObject obj);
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// Wrap wrapped object into a waiver wrapper and then re-wrap it.
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static bool WaiveXrayAndWrap(JSContext* cx, JS::MutableHandleValue vp);
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static bool WaiveXrayAndWrap(JSContext* cx, JS::MutableHandleObject object);
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};
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extern const js::Wrapper XrayWaiver;
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} // namespace xpc
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#endif /* _xpc_WRAPPERFACTORY_H */
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