/*

    Copyright (C) 1998 Lars Knoll (knoll@mpi-hd.mpg.de)

    Copyright (C) 2001 Dirk Mueller (mueller@kde.org)

    Copyright (C) 2002 Waldo Bastian (bastian@kde.org)

    Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)

    Copyright (C) 2004, 2005, 2006 Apple Computer, Inc.

    This library is free software; you can redistribute it and/or

    modify it under the terms of the GNU Library General Public

    License as published by the Free Software Foundation; either

    version 2 of the License, or (at your option) any later version.

    This library is distributed in the hope that it will be useful,

    but WITHOUT ANY WARRANTY; without even the implied warranty of

    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

    Library General Public License for more details.

    You should have received a copy of the GNU Library General Public License

    along with this library; see the file COPYING.LIB.  If not, write to

    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,

    Boston, MA 02110-1301, USA.

    This class provides all functionality needed for loading images, style sheets and html

    pages from the web. It has a memory cache for these objects.

*/

#include "config.h"

#include "CachedCSSStyleSheet.h"

#include "Cache.h"

#include "CachedResourceClient.h"

#include "CachedResourceClientWalker.h"

#include "TextResourceDecoder.h"

#include "DeprecatedString.h"

#include "loader.h"

#include <wtf/Vector.h>

namespace WebCore {

CachedCSSStyleSheet::CachedCSSStyleSheet(DocLoader* dl, const String& url, const String& charset, bool skipCanLoadCheck, bool sendResourceLoadCallbacks)

    : CachedResource(url, CSSStyleSheet, true, sendResourceLoadCallbacks)

    , m_decoder(new TextResourceDecoder("text/css", charset))

{

    // Prefer text/css but accept any type (dell.com serves a stylesheet

    // as text/html; see <http://bugs.webkit.org/show_bug.cgi?id=11451>).

    setAccept("text/css,*/*;q=0.1");

    cache()->loader()->load(dl, this, false, skipCanLoadCheck, sendResourceLoadCallbacks);

    m_loading = true;

}

CachedCSSStyleSheet::~CachedCSSStyleSheet()

{

}

void CachedCSSStyleSheet::ref(CachedResourceClient *c)

{

    CachedResource::ref(c);

    if (!m_loading)

        c->setCSSStyleSheet(m_url, m_decoder->encoding().name(), errorOccurred() ? "" : m_sheet);

}

void CachedCSSStyleSheet::setEncoding(const String& chs)

{

    m_decoder->setEncoding(chs, TextResourceDecoder::EncodingFromHTTPHeader);

}

void CachedCSSStyleSheet::data(PassRefPtr<SharedBuffer> data, bool allDataReceived)

{

    if (!allDataReceived)

        return;

    m_data = data;

    setEncodedSize(m_data.get() ? m_data->size() : 0);

    if (m_data.get()) {

        m_sheet = m_decoder->decode(m_data->data(), encodedSize());

        m_sheet += m_decoder->flush();

    }

    m_loading = false;

    checkNotify();

}

void CachedCSSStyleSheet::checkNotify()

{

    if (m_loading)

        return;

    CachedResourceClientWalker w(m_clients);

    while (CachedResourceClient *c = w.next())

        c->setCSSStyleSheet(m_response.url().url(), m_decoder->encoding().name(), m_sheet);

#if USE(LOW_BANDWIDTH_DISPLAY)        

    // if checkNotify() is called from error(), client's setCSSStyleSheet(...)

    // can't find "this" from url, so they can't do clean up if needed.

    // call notifyFinished() to make sure they have a chance.

    CachedResourceClientWalker n(m_clients);

    while (CachedResourceClient* s = n.next())

        s->notifyFinished(this);

#endif        

}

void CachedCSSStyleSheet::error()

{

    m_loading = false;

    m_errorOccurred = true;

    checkNotify();

}

}