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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
commit | 36d22d82aa202bb199967e9512281e9a53db42c9 (patch) | |
tree | 105e8c98ddea1c1e4784a60a5a6410fa416be2de /js/xpconnect/src/xpcObjectHelper.h | |
parent | Initial commit. (diff) | |
download | firefox-esr-upstream.tar.xz firefox-esr-upstream.zip |
Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | js/xpconnect/src/xpcObjectHelper.h | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/js/xpconnect/src/xpcObjectHelper.h b/js/xpconnect/src/xpcObjectHelper.h new file mode 100644 index 0000000000..1d83fdde15 --- /dev/null +++ b/js/xpconnect/src/xpcObjectHelper.h @@ -0,0 +1,68 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim: set ts=8 sts=2 et sw=2 tw=80: */ +/* 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/. */ + +#ifndef xpcObjectHelper_h +#define xpcObjectHelper_h + +// Including 'windows.h' will #define GetClassInfo to something else. +#ifdef XP_WIN +# ifdef GetClassInfo +# undef GetClassInfo +# endif +#endif + +#include "mozilla/Attributes.h" +#include <stdint.h> +#include "nsCOMPtr.h" +#include "nsIClassInfo.h" +#include "nsISupports.h" +#include "nsIXPCScriptable.h" +#include "nsWrapperCache.h" + +class xpcObjectHelper { + public: + explicit xpcObjectHelper(nsISupports* aObject, + nsWrapperCache* aCache = nullptr) + : mObject(aObject), mCache(aCache) { + if (!mCache && aObject) { + CallQueryInterface(aObject, &mCache); + } + } + + nsISupports* Object() { return mObject; } + + nsIClassInfo* GetClassInfo() { + if (!mClassInfo) { + mClassInfo = do_QueryInterface(mObject); + } + return mClassInfo; + } + + // We assert that we can reach an nsIXPCScriptable somehow. + uint32_t GetScriptableFlags() { + nsCOMPtr<nsIXPCScriptable> sinfo = do_QueryInterface(mObject); + + // We should have something by now. + MOZ_ASSERT(sinfo); + + // Grab the flags. + return sinfo->GetScriptableFlags(); + } + + nsWrapperCache* GetWrapperCache() { return mCache; } + + private: + xpcObjectHelper(xpcObjectHelper& aOther) = delete; + + nsISupports* MOZ_UNSAFE_REF( + "xpcObjectHelper has been specifically optimized " + "to avoid unnecessary AddRefs and Releases. " + "(see bug 565742)") mObject; + nsWrapperCache* mCache; + nsCOMPtr<nsIClassInfo> mClassInfo; +}; + +#endif |