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c460992407
refactor: remove unnecessary template type in EmitEvent() refactor: CallMethodWithArgs() takes a std::string_view
45 lines
1.7 KiB
C++
45 lines
1.7 KiB
C++
// Copyright (c) 2019 GitHub, Inc.
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// Use of this source code is governed by the MIT license that can be
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// found in the LICENSE file.
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#include "shell/common/gin_helper/event_emitter_caller.h"
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#include "shell/common/node_includes.h"
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namespace gin_helper::internal {
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v8::Local<v8::Value> CallMethodWithArgs(
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v8::Isolate* isolate,
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v8::Local<v8::Object> obj,
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const std::string_view method,
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const base::span<v8::Local<v8::Value>> args) {
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v8::EscapableHandleScope handle_scope{isolate};
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// CallbackScope and MakeCallback both require an active node::Environment
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if (!node::Environment::GetCurrent(isolate))
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return handle_scope.Escape(v8::False(isolate));
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node::CallbackScope callback_scope{isolate, v8::Object::New(isolate),
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node::async_context{0, 0}};
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// Perform microtask checkpoint after running JavaScript.
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v8::MicrotasksScope microtasks_scope(obj->GetCreationContextChecked(isolate),
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v8::MicrotasksScope::kRunMicrotasks);
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// node::MakeCallback will also run pending tasks in Node.js.
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v8::MaybeLocal<v8::Value> ret =
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node::MakeCallback(isolate, obj, gin::StringToV8(isolate, method),
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args.size(), args.data(), {0, 0});
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// If the JS function throws an exception (doesn't return a value) the result
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// of MakeCallback will be empty and therefore ToLocal will be false, in this
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// case we need to return "false" as that indicates that the event emitter did
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// not handle the event
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if (v8::Local<v8::Value> localRet; ret.ToLocal(&localRet))
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return handle_scope.Escape(localRet);
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return handle_scope.Escape(v8::False(isolate));
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}
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} // namespace gin_helper::internal
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