third_party/WebKit/Source/core/events/ErrorEvent.cpp

/*
 * Copyright (C) 2009 Google 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:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * 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.
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 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
 * OWNER OR 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,
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 */

#include "core/events/ErrorEvent.h"

#include "bindings/core/v8/V8Binding.h"
#include <memory>
#include <v8.h>

namespace blink {

ErrorEvent::ErrorEvent()
    : m_sanitizedMessage()
    , m_location(SourceLocation::create(String(), 0, 0, nullptr))
    , m_world(DOMWrapperWorld::current(v8::Isolate::GetCurrent()))
{
}

ErrorEvent::ErrorEvent(const AtomicString& type, const ErrorEventInit& initializer)
    : Event(type, initializer)
    , m_sanitizedMessage()
    , m_world(DOMWrapperWorld::current(v8::Isolate::GetCurrent()))
{
    if (initializer.hasMessage())
        m_sanitizedMessage = initializer.message();
    m_location = SourceLocation::create(
        initializer.hasFilename() ? initializer.filename() : String(),
        initializer.hasLineno() ? initializer.lineno() : 0,
        initializer.hasColno() ? initializer.colno() : 0,
        nullptr);
    if (initializer.hasError())
        m_error = initializer.error();
}

ErrorEvent::ErrorEvent(const String& message, std::unique_ptr<SourceLocation> location, DOMWrapperWorld* world)
    : Event(EventTypeNames::error, false, true)
    , m_sanitizedMessage(message)
    , m_location(std::move(location))
    , m_world(world)
{
}

void ErrorEvent::setUnsanitizedMessage(const String& message)
{
    ASSERT(m_unsanitizedMessage.isEmpty());
    m_unsanitizedMessage = message;
}

ErrorEvent::~ErrorEvent()
{
}

const AtomicString& ErrorEvent::interfaceName() const
{
    return EventNames::ErrorEvent;
}

ScriptValue ErrorEvent::error(ScriptState* scriptState) const
{
    // Don't return |m_error| when we are in the different worlds to avoid
    // leaking a V8 value.
    // We do not clone Error objects (exceptions), for 2 reasons:
    // 1) Errors carry a reference to the isolated world's global object, and
    //    thus passing it around would cause leakage.
    // 2) Errors cannot be cloned (or serialized):
    if (world() != &scriptState->world())
        return ScriptValue();
    return m_error;
}

DEFINE_TRACE(ErrorEvent)
{
    Event::trace(visitor);
}

} // namespace blink