Quelle ScriptTrace.h Sprache: C

/* -*- 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 mozilla_dom_ScriptTrace_h
#define mozilla_dom_ScriptTrace_h

#include "mozilla/AsyncEventDispatcher.h"
#include "mozilla/StaticPrefs_dom.h"
#include "js/loader/ScriptLoadRequest.h"
#include "mozilla/dom/ScriptLoadContext.h"

// This macro is used to wrap a tracing mechanism which is scheduling events
// which are then used by the JavaScript code of test cases to track the code
// path to verify the optimizations are working as expected.
#define TRACE_FOR_TEST(request, str)                 \
  PR_BEGIN_MACRO                                     \
  nsresult rv = NS_OK;                               \
  rv = mozilla::dom::script::TestingDispatchEvent(   \
      request, NS_LITERAL_STRING_FROM_CSTRING(str)); \
  NS_ENSURE_SUCCESS(rv, rv);                         \
  PR_END_MACRO

#define TRACE_FOR_TEST_BOOL(request, str)            \
  PR_BEGIN_MACRO                                     \
  nsresult rv = NS_OK;                               \
  rv = mozilla::dom::script::TestingDispatchEvent(   \
      request, NS_LITERAL_STRING_FROM_CSTRING(str)); \
  NS_ENSURE_SUCCESS(rv, false);                      \
  PR_END_MACRO

#define TRACE_FOR_TEST_NONE(request, str)            \
  PR_BEGIN_MACRO                                     \
  mozilla::dom::script::TestingDispatchEvent(        \
      request, NS_LITERAL_STRING_FROM_CSTRING(str)); \
  PR_END_MACRO

namespace mozilla::dom::script {

static nsresult TestingDispatchEvent(JS::loader::ScriptLoadRequest* aRequest,
                                     const nsAString& aEventType) {
  if (!StaticPrefs::dom_expose_test_interfaces()) {
    return NS_OK;
  }

  nsIScriptElement* scriptElement =
      aRequest->GetScriptLoadContext()->GetScriptElementForTrace();

  nsCOMPtr<nsINode> target(do_QueryInterface(scriptElement));
  if (!target) {
    return NS_OK;
  }

  RefPtr<AsyncEventDispatcher> dispatcher = new AsyncEventDispatcher(
      target, aEventType, CanBubble::eYes, ChromeOnlyDispatch::eNo);
  return dispatcher->PostDOMEvent();
}
}  // namespace mozilla::dom::script

#endif  // mozilla_dom_ScriptTrace_h

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