/*

 * Copyright (C) 2006, 2007, 2008 Apple Inc. All rights reserved.

 * Copyright (C) 2009 Torch Mobile, Inc.

 *

 * 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 COMPUTER, 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 "CachedFont.h"

#if PLATFORM(CG) || PLATFORM(QT) || PLATFORM(GTK) || (PLATFORM(CHROMIUM) && (OS(WINDOWS) || OS(LINUX))) || PLATFORM(HAIKU) || OS(WINCE) || PLATFORM(ANDROID)

#define STORE_FONT_CUSTOM_PLATFORM_DATA

#endif

#include "Cache.h"

#include "CachedResourceClient.h"

#include "CachedResourceClientWalker.h"

#include "FontPlatformData.h"

#include "SharedBuffer.h"

#include "TextResourceDecoder.h"

#include "loader.h"

#include <wtf/Vector.h>

#ifdef STORE_FONT_CUSTOM_PLATFORM_DATA

#include "FontCustomPlatformData.h"

#endif

#if ENABLE(SVG_FONTS)

#include "HTMLNames.h"

#include "NodeList.h"

#include "SVGElement.h"

#include "SVGFontElement.h"

#include "SVGGElement.h"

#endif

namespace WebCore {

CachedFont::CachedFont(const String &url)

    : CachedResource(url, FontResource)

    , m_fontData(0)

    , m_loadInitiated(false)

#if ENABLE(SVG_FONTS)

    , m_isSVGFont(false)

#endif

{

}

CachedFont::~CachedFont()

{

#ifdef STORE_FONT_CUSTOM_PLATFORM_DATA

    delete m_fontData;

#endif

}

void CachedFont::load(DocLoader*)

{

    // Don't load the file yet.  Wait for an access before triggering the load.

    setLoading(true);

}

void CachedFont::didAddClient(CachedResourceClient* c)

{

    if (!isLoading())

        c->fontLoaded(this);

}

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

{

    if (!allDataReceived)

        return;

    m_data = data;     

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

    setLoading(false);

    checkNotify();

}

void CachedFont::beginLoadIfNeeded(DocLoader* dl)

{

    if (!m_loadInitiated) {

        m_loadInitiated = true;

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

    }

}

bool CachedFont::ensureCustomFontData()

{

#ifdef STORE_FONT_CUSTOM_PLATFORM_DATA

#if ENABLE(SVG_FONTS)

    ASSERT(!m_isSVGFont);

#endif

    if (!m_fontData && !errorOccurred() && !isLoading() && m_data) {

        m_fontData = createFontCustomPlatformData(m_data.get());

        if (!m_fontData)

            setErrorOccurred(true);

    }

#endif

    return m_fontData;

}

FontPlatformData CachedFont::platformDataFromCustomData(float size, bool bold, bool italic, FontRenderingMode renderingMode)

{

#if ENABLE(SVG_FONTS)

    if (m_externalSVGDocument)

        return FontPlatformData(size, bold, italic);

#endif

#ifdef STORE_FONT_CUSTOM_PLATFORM_DATA

    ASSERT(m_fontData);

    return m_fontData->fontPlatformData(static_cast<int>(size), bold, italic, renderingMode);

#else

    return FontPlatformData();

#endif

}

#if ENABLE(SVG_FONTS)

bool CachedFont::ensureSVGFontData()

{

    ASSERT(m_isSVGFont);

    if (!m_externalSVGDocument && !errorOccurred() && !isLoading() && m_data) {

        m_externalSVGDocument = SVGDocument::create(0, KURL());

        m_externalSVGDocument->open();

        RefPtr<TextResourceDecoder> decoder = TextResourceDecoder::create("application/xml");

        m_externalSVGDocument->write(decoder->decode(m_data->data(), m_data->size()));

        m_externalSVGDocument->write(decoder->flush());

        if (decoder->sawError()) {

            m_externalSVGDocument.clear();

            return 0;

        }

        m_externalSVGDocument->finishParsing();

        m_externalSVGDocument->close();

    }

    return m_externalSVGDocument;

}

SVGFontElement* CachedFont::getSVGFontById(const String& fontName) const

{

    ASSERT(m_isSVGFont);

    RefPtr<NodeList> list = m_externalSVGDocument->getElementsByTagNameNS(SVGNames::fontTag.namespaceURI(), SVGNames::fontTag.localName());

    if (!list)

        return 0;

    unsigned listLength = list->length();

    if (!listLength)

        return 0;

#ifndef NDEBUG

    for (unsigned i = 0; i < listLength; ++i) {

        ASSERT(list->item(i));

        ASSERT(list->item(i)->hasTagName(SVGNames::fontTag));

    }

#endif

    if (fontName.isEmpty())

        return static_cast<SVGFontElement*>(list->item(0));

    for (unsigned i = 0; i < listLength; ++i) {

        SVGFontElement* element = static_cast<SVGFontElement*>(list->item(i));

        if (element->getIdAttribute() == fontName)

            return element;

    }

    return 0;

}

#endif

void CachedFont::allClientsRemoved()

{

#ifdef STORE_FONT_CUSTOM_PLATFORM_DATA

    if (m_fontData) {

        delete m_fontData;

        m_fontData = 0;

    }

#endif

}

void CachedFont::checkNotify()

{

    if (isLoading())

        return;

    CachedResourceClientWalker w(m_clients);

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

         c->fontLoaded(this);

}

void CachedFont::error()

{

    setLoading(false);

    setErrorOccurred(true);

    checkNotify();

}

}