1 files changed, 97 insertions, 0 deletions
diff --git a/src/javascript/jsc/bindings/webcore/JSDOMPromise.cpp b/src/javascript/jsc/bindings/webcore/JSDOMPromise.cpp
new file mode 100644
index 000000000..544d61b5d
--- /dev/null
+++ b/src/javascript/jsc/bindings/webcore/JSDOMPromise.cpp
@@ -0,0 +1,97 @@
+/*
+ * Copyright (C) 2017-2021 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "JSDOMPromise.h"
+
+// #include "DOMWindow.h"
+// #include "JSDOMWindow.h"
+#include <JavaScriptCore/BuiltinNames.h>
+#include <JavaScriptCore/CatchScope.h>
+#include <JavaScriptCore/Exception.h>
+#include <JavaScriptCore/JSNativeStdFunction.h>
+#include <JavaScriptCore/JSPromiseConstructor.h>
+
+using namespace JSC;
+
+namespace WebCore {
+
+auto DOMPromise::whenSettled(std::function<void()>&& callback) -> IsCallbackRegistered
+{
+    return whenPromiseIsSettled(globalObject(), promise(), WTFMove(callback));
+}
+
+auto DOMPromise::whenPromiseIsSettled(JSDOMGlobalObject* globalObject, JSC::JSObject* promise, Function<void()>&& callback) -> IsCallbackRegistered
+{
+    auto& lexicalGlobalObject = *globalObject;
+    auto& vm = lexicalGlobalObject.vm();
+    JSLockHolder lock(vm);
+    auto* handler = JSC::JSNativeStdFunction::create(vm, globalObject, 1, String {}, [callback = WTFMove(callback)](JSGlobalObject*, CallFrame*) mutable {
+        callback();
+        return JSC::JSValue::encode(JSC::jsUndefined());
+    });
+
+    auto scope = DECLARE_THROW_SCOPE(vm);
+    const JSC::Identifier& privateName = vm.propertyNames->builtinNames().thenPrivateName();
+    auto thenFunction = promise->get(&lexicalGlobalObject, privateName);
+
+    EXCEPTION_ASSERT(!scope.exception() || vm.hasPendingTerminationException());
+    if (scope.exception())
+        return IsCallbackRegistered::No;
+
+    ASSERT(thenFunction.isCallable(vm));
+
+    JSC::MarkedArgumentBuffer arguments;
+    arguments.append(handler);
+    arguments.append(handler);
+
+    auto callData = JSC::getCallData(vm, thenFunction);
+    ASSERT(callData.type != JSC::CallData::Type::None);
+    call(&lexicalGlobalObject, thenFunction, callData, promise, arguments);
+
+    EXCEPTION_ASSERT(!scope.exception() || vm.hasPendingTerminationException());
+    return scope.exception() ? IsCallbackRegistered::No : IsCallbackRegistered::Yes;
+}
+
+JSC::JSValue DOMPromise::result() const
+{
+    return promise()->result(m_globalObject->vm());
+}
+
+DOMPromise::Status DOMPromise::status() const
+{
+    switch (promise()->status(m_globalObject->vm())) {
+    case JSC::JSPromise::Status::Pending:
+        return Status::Pending;
+    case JSC::JSPromise::Status::Fulfilled:
+        return Status::Fulfilled;
+    case JSC::JSPromise::Status::Rejected:
+        return Status::Rejected;
+    };
+    ASSERT_NOT_REACHED();
+    return Status::Rejected;
+}
+
+}