/*

* Copyright (C) 2007-2017 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 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 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 "CSSMarkup.h"

#include "CachedFont.h"

#include "CachedFontLoadRequest.h"

#include "CachedResourceLoader.h"

#include "CachedResourceRequest.h"

#include "CachedResourceRequestInitiators.h"

#include "FontCustomPlatformData.h"

#include "FontLoadRequest.h"

#include "Node.h"

#include "SVGFontFaceElement.h"

#include "ScriptExecutionContext.h"

#include <wtf/text/StringBuilder.h>

namespace WebCore {

bool CSSFontFaceSrcValue::isSVGFontFaceSrc() const

{

return equalLettersIgnoringASCIICase(m_format, "svg");

}

bool CSSFontFaceSrcValue::isSVGFontTarget() const

{

return isSVGFontFaceSrc() || svgFontFaceElement();

}

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 assume that we shouldn't load it.

if (m_format.isEmpty()) {

// Check for .eot.

if (!protocolIs(m_resource, "data") && m_resource.endsWithIgnoringASCIICase(".eot"))

return false;

return true;

}

return FontCustomPlatformData::supportsFormat(m_format) || isSVGFontFaceSrc();

}

String CSSFontFaceSrcValue::customCSSText() const

{

// FIXME: URLs should not be absolutized, but instead should be serialized exactly as they were specified.

const char* prefix = isLocal() ? "local(" : "url(";

if (m_format.isEmpty())

return makeString(prefix, serializeString(m_resource), ")");

return makeString(prefix, serializeString(m_resource), ")", " format(", serializeString(m_format), ")");

}

bool CSSFontFaceSrcValue::traverseSubresources(const WTF::Function<bool (const CachedResource&)>& handler) const

{

if (!m_cachedFont)

return false;

return handler(*m_cachedFont);

}

std::unique_ptr<FontLoadRequest> CSSFontFaceSrcValue::fontLoadRequest(ScriptExecutionContext* context, bool isSVG, bool isInitiatingElementInUserAgentShadowTree)

{

if (m_cachedFont)

return makeUnique<CachedFontLoadRequest>(*m_cachedFont);

auto request = context->fontLoadRequest(m_resource, isSVG, isInitiatingElementInUserAgentShadowTree, m_loadedFromOpaqueSource);

if (is<CachedFontLoadRequest>(request.get()))

m_cachedFont = &downcast<CachedFontLoadRequest>(request.get())->cachedFont();

return request;

}

bool CSSFontFaceSrcValue::equals(const CSSFontFaceSrcValue& other) const

{

return m_isLocal == other.m_isLocal && m_format == other.m_format && m_resource == other.m_resource;

}

}