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/*
* 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 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 "CachedFont.h"
#include "CachedFontClient.h"
#include "CachedResourceClientWalker.h"
#include "CachedResourceLoader.h"
#include "FontCustomPlatformData.h"
#include "FontDescription.h"
#include "FontPlatformData.h"
#include "MemoryCache.h"
#include "SharedBuffer.h"
#include "TextResourceDecoder.h"
#include "TypedElementDescendantIterator.h"
#include "WOFFFileFormat.h"
#include <wtf/Vector.h>
#if ENABLE(SVG_FONTS)
#include "NodeList.h"
#include "SVGDocument.h"
#include "SVGElement.h"
#include "SVGFontElement.h"
#include "SVGGElement.h"
#include "SVGNames.h"
#endif
namespace WebCore {
CachedFont::CachedFont(const ResourceRequest& resourceRequest, SessionID sessionID, Type type)
: CachedResource(resourceRequest, type, sessionID)
, m_loadInitiated(false)
, m_hasCreatedFontDataWrappingResource(false)
{
}
CachedFont::~CachedFont()
{
}
void CachedFont::load(CachedResourceLoader&, const ResourceLoaderOptions& options)
{
// Don't load the file yet. Wait for an access before triggering the load.
setLoading(true);
m_options = options;
}
void CachedFont::didAddClient(CachedResourceClient* client)
{
ASSERT(client->resourceClientType() == CachedFontClient::expectedType());
if (!isLoading())
static_cast<CachedFontClient*>(client)->fontLoaded(*this);
}
void CachedFont::finishLoading(SharedBuffer* data)
{
m_data = data;
setEncodedSize(m_data.get() ? m_data->size() : 0);
setLoading(false);
checkNotify();
}
void CachedFont::beginLoadIfNeeded(CachedResourceLoader& loader)
{
if (!m_loadInitiated) {
m_loadInitiated = true;
CachedResource::load(loader, m_options);
}
}
bool CachedFont::ensureCustomFontData(const AtomicString&)
{
return ensureCustomFontData(m_data.get());
}
bool CachedFont::ensureCustomFontData(SharedBuffer* data)
{
if (!m_fontCustomPlatformData && !errorOccurred() && !isLoading() && data) {
RefPtr<SharedBuffer> buffer(data);
#if !PLATFORM(COCOA)
if (isWOFF(buffer.get())) {
Vector<char> convertedFont;
if (!convertWOFFToSfnt(buffer.get(), convertedFont))
buffer = nullptr;
else
buffer = SharedBuffer::adoptVector(convertedFont);
}
#endif
m_fontCustomPlatformData = buffer ? createFontCustomPlatformData(*buffer) : nullptr;
m_hasCreatedFontDataWrappingResource = m_fontCustomPlatformData && (buffer == m_data);
if (!m_fontCustomPlatformData)
setStatus(DecodeError);
}
return m_fontCustomPlatformData.get();
}
RefPtr<Font> CachedFont::createFont(const FontDescription& fontDescription, const AtomicString&, bool syntheticBold, bool syntheticItalic, const FontFeatureSettings& fontFaceFeatures, const FontVariantSettings& fontFaceVariantSettings)
{
return Font::create(platformDataFromCustomData(fontDescription, syntheticBold, syntheticItalic, fontFaceFeatures, fontFaceVariantSettings), true, false);
}
FontPlatformData CachedFont::platformDataFromCustomData(const FontDescription& fontDescription, bool bold, bool italic, const FontFeatureSettings& fontFaceFeatures, const FontVariantSettings& fontFaceVariantSettings)
{
ASSERT(m_fontCustomPlatformData);
#if PLATFORM(COCOA)
return m_fontCustomPlatformData->fontPlatformData(fontDescription, bold, italic, fontFaceFeatures, fontFaceVariantSettings);
#else
UNUSED_PARAM(fontFaceFeatures);
UNUSED_PARAM(fontFaceVariantSettings);
return m_fontCustomPlatformData->fontPlatformData(fontDescription, bold, italic);
#endif
}
void CachedFont::allClientsRemoved()
{
m_fontCustomPlatformData = nullptr;
}
void CachedFont::checkNotify()
{
if (isLoading())
return;
CachedResourceClientWalker<CachedFontClient> walker(m_clients);
while (CachedFontClient* client = walker.next())
client->fontLoaded(*this);
}
bool CachedFont::mayTryReplaceEncodedData() const
{
// If a FontCustomPlatformData has ever been constructed to wrap the internal resource buffer then it still might be in use somewhere.
// That platform font object might directly reference the encoded data buffer behind this CachedFont,
// so replacing it is unsafe.
return !m_hasCreatedFontDataWrappingResource;
}
}
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