/*

 * Copyright (C) 2010 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. ``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 COMPUTER, INC. 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, 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 "SchemeRegistry.h"

namespace WebCore {

static URLSchemesMap& localURLSchemes()

{

    DEFINE_STATIC_LOCAL(URLSchemesMap, localSchemes, ());

    if (localSchemes.isEmpty()) {

        localSchemes.add("file");

#if PLATFORM(MAC)

        localSchemes.add("applewebdata");

#endif

#if PLATFORM(QT)

        localSchemes.add("qrc");

#endif

    }

    return localSchemes;

}

static URLSchemesMap& secureSchemes()

{

    DEFINE_STATIC_LOCAL(URLSchemesMap, secureSchemes, ());

    if (secureSchemes.isEmpty()) {

        secureSchemes.add("https");

        secureSchemes.add("about");

        secureSchemes.add("data");

    }

    return secureSchemes;

}

static URLSchemesMap& schemesWithUniqueOrigins()

{

    DEFINE_STATIC_LOCAL(URLSchemesMap, schemesWithUniqueOrigins, ());

    // This is a willful violation of HTML5.

    // See https://bugs.webkit.org/show_bug.cgi?id=11885

    if (schemesWithUniqueOrigins.isEmpty())

        schemesWithUniqueOrigins.add("data");

    return schemesWithUniqueOrigins;

}

void SchemeRegistry::registerURLSchemeAsLocal(const String& scheme)

{

    WebCore::localURLSchemes().add(scheme);

}

void SchemeRegistry::removeURLSchemeRegisteredAsLocal(const String& scheme)

{

    if (scheme == "file")

        return;

#if PLATFORM(MAC)

    if (scheme == "applewebdata")

        return;

#endif

    WebCore::localURLSchemes().remove(scheme);

}

const URLSchemesMap& SchemeRegistry::localURLSchemes()

{

    return WebCore::localURLSchemes();

}

bool SchemeRegistry::shouldTreatURLAsLocal(const String& url)

{

    // This avoids an allocation of another String and the HashSet contains()

    // call for the file: and http: schemes.

    if (url.length() >= 5) {

        const UChar* s = url.characters();

        if (s[0] == 'h' && s[1] == 't' && s[2] == 't' && s[3] == 'p' && s[4] == ':')

            return false;

        if (s[0] == 'f' && s[1] == 'i' && s[2] == 'l' && s[3] == 'e' && s[4] == ':')

            return true;

    }

    int loc = url.find(':');

    if (loc == -1)

        return false;

    String scheme = url.left(loc);

    return WebCore::localURLSchemes().contains(scheme);

}

bool SchemeRegistry::shouldTreatURLSchemeAsLocal(const String& scheme)

{

    // This avoids an allocation of another String and the HashSet contains()

    // call for the file: and http: schemes.

    if (scheme.length() == 4) {

        const UChar* s = scheme.characters();

        if (s[0] == 'h' && s[1] == 't' && s[2] == 't' && s[3] == 'p')

            return false;

        if (s[0] == 'f' && s[1] == 'i' && s[2] == 'l' && s[3] == 'e')

            return true;

    }

    if (scheme.isEmpty())

        return false;

    return WebCore::localURLSchemes().contains(scheme);

}

void SchemeRegistry::registerURLSchemeAsNoAccess(const String& scheme)

{

    schemesWithUniqueOrigins().add(scheme);

}

bool SchemeRegistry::shouldTreatURLSchemeAsNoAccess(const String& scheme)

{

    return schemesWithUniqueOrigins().contains(scheme);

}

void SchemeRegistry::registerURLSchemeAsSecure(const String& scheme)

{

    secureSchemes().add(scheme);

}

bool SchemeRegistry::shouldTreatURLSchemeAsSecure(const String& scheme)

{

    return secureSchemes().contains(scheme);

}

} // namespace WebCore