/*

 * Copyright (C) 2007 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.

 * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of

 *     its contributors may be used to endorse or promote products derived

 *     from this software without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY APPLE 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 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 "SecurityOrigin.h"

#include "Document.h"

#include "Frame.h"

#include "FrameLoader.h"

#include "FrameTree.h"

#include "KURL.h"

#include "PlatformString.h"

namespace WebCore {

SecurityOrigin::SecurityOrigin()

    : m_port(0)

    , m_portSet(false)

    , m_noAccess(false)

    , m_domainWasSetInDOM(false)

{

}

void SecurityOrigin::clear()

{

    m_protocol = String();

    m_host = String();

    m_port = 0;

    m_portSet = false;

    m_noAccess = false;

    m_domainWasSetInDOM = false;

}

bool SecurityOrigin::isEmpty() const

{

    return m_protocol.isEmpty();

}

void SecurityOrigin::setForFrame(Frame* frame)

{

    clear();

    FrameLoader* loader = frame->loader();

    const KURL& securityPolicyURL = loader->url();

    if (!securityPolicyURL.isEmpty()) {

        m_protocol = securityPolicyURL.protocol().lower();

        m_host = securityPolicyURL.host().lower();

        m_port = securityPolicyURL.port();

        if (m_port)

            m_portSet = true;

        // data: URLs are not allowed access to anything other than themselves.

        if (m_protocol == "data") {

            m_noAccess = true;

            return;

        }

        // Only in the case of about:blank or javascript: URLs (which create documents using the "about" 

        // protocol) do we want to use the parent or openers URL as the origin.

        if (m_protocol != "about")

            return;

    }

    Frame* openerFrame = frame->tree()->parent();

    if (!openerFrame) {

        openerFrame = loader->opener();

        if (!openerFrame)

            return;

    }

    Document* openerDocument = openerFrame->document();

    if (!openerDocument)

        return;

    *this = openerDocument->securityOrigin();

}

void SecurityOrigin::setDomainFromDOM(const String& newDomain)

{

    m_domainWasSetInDOM = true;

    m_host = newDomain.lower();

}

bool SecurityOrigin::canAccess(const SecurityOrigin& other) const

{

    if (m_protocol == "file")

        return true;

    if (m_noAccess || other.m_noAccess)

        return false;

    if (m_domainWasSetInDOM && other.m_domainWasSetInDOM && m_host == other.m_host)

        return true;

    return m_host == other.m_host && m_protocol == other.m_protocol && m_port == other.m_port;

}

bool SecurityOrigin::isSecureTransitionTo(const KURL& url) const

{ 

    // New window created by the application

    if (isEmpty())

        return true;

    if (m_protocol == "file")

        return true;

    return equalIgnoringCase(m_host, String(url.host())) && equalIgnoringCase(m_protocol, String(url.protocol())) && m_port == url.port();

}

} // namespace WebCore