/*

 * Copyright (C) 2007, 2008 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 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 "CSSFontFace.h"

#include "CSSFontFaceSource.h"

#include "CSSFontSelector.h"

#include "CSSSegmentedFontFace.h"

#include "FontDescription.h"

#include "SimpleFontData.h"

namespace WebCore {

CSSFontFace::~CSSFontFace()

{

    deleteAllValues(m_sources);

}

bool CSSFontFace::isLoaded() const

{

    unsigned size = m_sources.size();

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

        if (!m_sources[i]->isLoaded())

            return false;

    }

    return true;

}

bool CSSFontFace::isValid() const

{

    unsigned size = m_sources.size();

    if (!size)

        return false;

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

        if (m_sources[i]->isValid())

            return true;

    }

    return false;

}

void CSSFontFace::addedToSegmentedFontFace(CSSSegmentedFontFace* segmentedFontFace)

{

    m_segmentedFontFaces.add(segmentedFontFace);

}

void CSSFontFace::removedFromSegmentedFontFace(CSSSegmentedFontFace* segmentedFontFace)

{

    m_segmentedFontFaces.remove(segmentedFontFace);

}

void CSSFontFace::addSource(CSSFontFaceSource* source)

{

    m_sources.append(source);

    source->setFontFace(this);

}

void CSSFontFace::fontLoaded(CSSFontFaceSource* source)

{

    if (source != m_activeSource)

        return;

    // FIXME: Can we assert that m_segmentedFontFaces is not empty? That may

    // require stopping in-progress font loading when the last

    // CSSSegmentedFontFace is removed.

    if (m_segmentedFontFaces.isEmpty())

        return;

    HashSet<CSSSegmentedFontFace*>::iterator end = m_segmentedFontFaces.end();

    for (HashSet<CSSSegmentedFontFace*>::iterator it = m_segmentedFontFaces.begin(); it != end; ++it)

        (*it)->fontLoaded(this);

    // Use one of the CSSSegmentedFontFaces' font selector. They all have

    // the same font selector, so it's wasteful to store it in the CSSFontFace.

    CSSFontSelector* fontSelector = (*m_segmentedFontFaces.begin())->fontSelector();

    fontSelector->fontLoaded();

}

SimpleFontData* CSSFontFace::getFontData(const FontDescription& fontDescription, bool syntheticBold, bool syntheticItalic)

{

    m_activeSource = 0;

    if (!isValid())

        return 0;

    ASSERT(!m_segmentedFontFaces.isEmpty());

    CSSFontSelector* fontSelector = (*m_segmentedFontFaces.begin())->fontSelector();

    size_t size = m_sources.size();

    for (size_t i = 0; i < size; ++i) {

        if (SimpleFontData* result = m_sources[i]->getFontData(fontDescription, syntheticBold, syntheticItalic, fontSelector)) {

            m_activeSource = m_sources[i];

            return result;

        }

    }

    return 0;

}

}