/*
 * Copyright (C) 2008, 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.
 * 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 "sky/engine/config.h"
#include "sky/engine/core/frame/Location.h"

#include "sky/engine/bindings/exception_state.h"
#include "sky/engine/core/dom/DOMURLUtilsReadOnly.h"
#include "sky/engine/core/dom/Document.h"
#include "sky/engine/core/dom/ExceptionCode.h"
#include "sky/engine/core/frame/LocalDOMWindow.h"
#include "sky/engine/core/frame/LocalFrame.h"
#include "sky/engine/platform/weborigin/KURL.h"

namespace blink {

Location::Location(LocalFrame* frame)
    : DOMWindowProperty(frame)
{
}

inline const KURL& Location::url() const
{
    ASSERT(m_frame);

    const KURL& url = m_frame->document()->url();
    if (!url.isValid())
        return blankURL(); // Use "about:blank" while the page is still loading (before we have a frame).

    return url;
}

String Location::href() const
{
    if (!m_frame)
        return String();

    return url().string();
}

String Location::protocol() const
{
    if (!m_frame)
        return String();
    return DOMURLUtilsReadOnly::protocol(url());
}

String Location::host() const
{
    if (!m_frame)
        return String();
    return DOMURLUtilsReadOnly::host(url());
}

String Location::hostname() const
{
    if (!m_frame)
        return String();
    return DOMURLUtilsReadOnly::hostname(url());
}

String Location::port() const
{
    if (!m_frame)
        return String();
    return DOMURLUtilsReadOnly::port(url());
}

String Location::pathname() const
{
    if (!m_frame)
        return String();
    return DOMURLUtilsReadOnly::pathname(url());
}

String Location::search() const
{
    if (!m_frame)
        return String();
    return DOMURLUtilsReadOnly::search(url());
}

String Location::origin() const
{
    if (!m_frame)
        return String();
    return DOMURLUtilsReadOnly::origin(url());
}

String Location::hash() const
{
    if (!m_frame)
        return String();

    return DOMURLUtilsReadOnly::hash(url());
}

void Location::setHref(const String& url)
{
    if (!m_frame)
        return;
    setLocation(url);
}

void Location::setProtocol(const String& protocol, ExceptionState& exceptionState)
{
    if (!m_frame)
        return;
    KURL url = m_frame->document()->url();
    if (!url.setProtocol(protocol)) {
        exceptionState.ThrowDOMException(SyntaxError, "'" + protocol + "' is an invalid protocol.");
        return;
    }
    setLocation(url.string());
}

void Location::setHost(const String& host)
{
    if (!m_frame)
        return;
    KURL url = m_frame->document()->url();
    url.setHostAndPort(host);
    setLocation(url.string());
}

void Location::setHostname(const String& hostname)
{
    if (!m_frame)
        return;
    KURL url = m_frame->document()->url();
    url.setHost(hostname);
    setLocation(url.string());
}

void Location::setPort(const String& portString)
{
    if (!m_frame)
        return;
    KURL url = m_frame->document()->url();
    url.setPort(portString);
    setLocation(url.string());
}

void Location::setPathname(const String& pathname)
{
    if (!m_frame)
        return;
    KURL url = m_frame->document()->url();
    url.setPath(pathname);
    setLocation(url.string());
}

void Location::setSearch(const String& search)
{
    if (!m_frame)
        return;
    KURL url = m_frame->document()->url();
    url.setQuery(search);
    setLocation(url.string());
}

void Location::setHash(const String& hash)
{
    if (!m_frame)
        return;
    KURL url = m_frame->document()->url();
    String oldFragmentIdentifier = url.fragmentIdentifier();
    String newFragmentIdentifier = hash;
    if (hash[0] == '#')
        newFragmentIdentifier = hash.substring(1);
    url.setFragmentIdentifier(newFragmentIdentifier);
    // Note that by parsing the URL and *then* comparing fragments, we are
    // comparing fragments post-canonicalization, and so this handles the
    // cases where fragment identifiers are ignored or invalid.
    if (equalIgnoringNullity(oldFragmentIdentifier, url.fragmentIdentifier()))
        return;
    setLocation(url.string());
}

void Location::assign(const String& url)
{
    if (!m_frame)
        return;
    setLocation(url);
}

void Location::replace(const String& url)
{
    if (!m_frame)
        return;
    // Note: We call LocalDOMWindow::setLocation directly here because replace() always operates on the current frame.
    m_frame->domWindow()->setLocation(url, LockHistoryAndBackForwardList);
}

void Location::reload()
{
    // FIXME(sky): remove.
}

void Location::setLocation(const String& url)
{
    ASSERT(m_frame);
    m_frame->domWindow()->setLocation(url);
}

} // namespace blink