mirror of
https://github.com/LadybirdBrowser/ladybird.git
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81 lines
2.8 KiB
C++
81 lines
2.8 KiB
C++
/*
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* Copyright (c) 2021, the SerenityOS developers.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include <AK/StdLibExtras.h>
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#include <LibJS/Runtime/VM.h>
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#include <LibWeb/Bindings/DOMExceptionWrapper.h>
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#include <LibWeb/DOM/ExceptionOr.h>
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namespace Web::Bindings {
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template<typename>
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struct IsExceptionOr : AK::FalseType {
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};
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template<typename T>
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struct IsExceptionOr<DOM::ExceptionOr<T>> : AK::TrueType {
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};
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template<typename T>
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ALWAYS_INLINE bool throw_dom_exception(JS::VM& vm, JS::GlobalObject& global_object, DOM::ExceptionOr<T>& result)
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{
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if (result.is_exception()) {
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vm.throw_exception(global_object, DOMExceptionWrapper::create(global_object, const_cast<DOM::DOMException&>(result.exception())));
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return true;
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}
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return false;
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}
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template<typename F, typename T = decltype(declval<F>()()), typename Ret = typename Conditional<!IsExceptionOr<T>::value && !IsVoid<T>::value, T, JS::Value>::Type>
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Ret throw_dom_exception_if_needed(auto&& vm, auto&& global_object, F&& fn)
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{
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if constexpr (IsExceptionOr<T>::value) {
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auto&& result = fn();
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if (throw_dom_exception(vm, global_object, result))
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return JS::Value();
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if constexpr (requires(T v) { v.value(); })
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return result.value();
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return JS::Value();
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} else if constexpr (IsVoid<T>::value) {
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fn();
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return JS::js_undefined();
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} else {
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return fn();
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}
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}
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template<typename T>
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bool should_return_empty(T&& value)
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{
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if constexpr (IsSame<JS::Value, T>::value)
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return value.is_empty();
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return false;
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}
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}
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