cssfontfacesrcvalue.cpp

linux下开源浏览器WebKit的源码,市面上的很多商用浏览器都是移植自WebKit

/*
 * Copyright (C) 2007 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 "CSSFontFaceSrcValue.h"
#include "CSSStyleSheet.h"
#include "Node.h"

namespace WebCore {

#if ENABLE(SVG_FONTS)
bool CSSFontFaceSrcValue::isSVGFontFaceSrc() const
{
    return equalIgnoringCase(m_format, "svg");
}
#endif

bool CSSFontFaceSrcValue::isSupportedFormat() const
{
    // Normally we would just check the format, but in order to avoid conflicts with the old WinIE style of font-face,
    // we will also check to see if the URL ends with .eot.  If so, we'll go ahead and assume that we shouldn't load it.
    if (m_format.isEmpty()) {
        // Check for .eot.
        if (m_resource.endsWith("eot", false))
            return false;
        return true;
    }

    return equalIgnoringCase(m_format, "truetype") || equalIgnoringCase(m_format, "opentype")
#if ENABLE(SVG_FONTS)
           || isSVGFontFaceSrc()
#endif
           ;
}

String CSSFontFaceSrcValue::cssText() const
{
    String result;
    if (isLocal())
        result += "local(";
    else
        result += "url(";
    result += m_resource;
    result += ")";
    if (!m_format.isEmpty())
        result += " format(" + m_format + ")";
    return result;
}

void CSSFontFaceSrcValue::addSubresourceStyleURLs(ListHashSet<KURL>& urls, const CSSStyleSheet* styleSheet)
{
    if (!isLocal())
        addSubresourceURL(urls, styleSheet->completeURL(m_resource));
}

}