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/*
* Copyright (C) 2007, 2010 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 "core/css/CSSFontFaceSrcValue.h"
#include "core/FetchInitiatorTypeNames.h"
#include "core/css/StyleSheetContents.h"
#include "core/dom/Document.h"
#include "core/dom/Node.h"
#include "core/fetch/FetchRequest.h"
#include "core/fetch/FontResource.h"
#include "core/fetch/ResourceFetcher.h"
#include "platform/fonts/FontCache.h"
#include "platform/fonts/FontCustomPlatformData.h"
#include "wtf/text/StringBuilder.h"
namespace blink {
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())
return m_resource.startsWith("data:", false) || !m_resource.endsWith(".eot", false);
return FontCustomPlatformData::supportsFormat(m_format);
}
String CSSFontFaceSrcValue::customCSSText() const
{
StringBuilder result;
if (isLocal())
result.appendLiteral("local(");
else
result.appendLiteral("url(");
result.append(m_resource);
result.append(')');
if (!m_format.isEmpty()) {
result.appendLiteral(" format(");
result.append(m_format);
result.append(')');
}
return result.toString();
}
bool CSSFontFaceSrcValue::hasFailedOrCanceledSubresources() const
{
return m_fetched && m_fetched->loadFailedOrCanceled();
}
bool CSSFontFaceSrcValue::shouldSetCrossOriginAccessControl(const KURL& resource, SecurityOrigin* securityOrigin)
{
if (resource.isLocalFile() || resource.protocolIsData())
return false;
return !securityOrigin->canRequest(resource);
}
FontResource* CSSFontFaceSrcValue::fetch(Document* document)
{
if (!m_fetched) {
FetchRequest request(ResourceRequest(document->completeURL(m_resource)), FetchInitiatorTypeNames::css);
request.setContentSecurityCheck(m_shouldCheckContentSecurityPolicy);
SecurityOrigin* securityOrigin = document->securityOrigin();
if (shouldSetCrossOriginAccessControl(request.url(), securityOrigin)) {
request.setCrossOriginAccessControl(securityOrigin, DoNotAllowStoredCredentials);
}
request.mutableResourceRequest().setHTTPReferrer(m_referrer);
m_fetched = document->fetcher()->fetchFont(request);
} else {
// FIXME: CSSFontFaceSrcValue::fetch is invoked when @font-face rule
// is processed by StyleResolver / StyleEngine.
restoreCachedResourceIfNeeded(document);
}
return m_fetched.get();
}
void CSSFontFaceSrcValue::restoreCachedResourceIfNeeded(Document* document)
{
ASSERT(m_fetched);
ASSERT(document && document->fetcher());
const String resourceURL = document->completeURL(m_resource);
if (document->fetcher()->cachedResource(KURL(ParsedURLString, resourceURL)))
return;
FetchRequest request(ResourceRequest(resourceURL), FetchInitiatorTypeNames::css);
request.setContentSecurityCheck(m_shouldCheckContentSecurityPolicy);
document->fetcher()->maybeNotifyInsecureContent(m_fetched.get());
document->fetcher()->requestLoadStarted(m_fetched.get(), request, ResourceFetcher::ResourceLoadingFromCache);
}
bool CSSFontFaceSrcValue::equals(const CSSFontFaceSrcValue& other) const
{
return m_isLocal == other.m_isLocal && m_format == other.m_format && m_resource == other.m_resource;
}
}
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