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/*
* Copyright (C) 2007-2022 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 "CSSFontFaceSource.h"
#include "CSSFontFace.h"
#include "CSSFontSelector.h"
#include "CachedFontLoadRequest.h"
#include "CachedSVGFont.h"
#include "Document.h"
#include "Font.h"
#include "FontCache.h"
#include "FontCascadeDescription.h"
#include "FontCreationContext.h"
#include "FontCustomPlatformData.h"
#include "FontDescription.h"
#include "ResourceLoadObserver.h"
#include "SVGElementTypeHelpers.h"
#include "SVGFontElement.h"
#include "SVGFontFaceElement.h"
#include "SVGToOTFFontConversion.h"
#include "SVGURIReference.h"
#include "SharedBuffer.h"
namespace WebCore {
inline void CSSFontFaceSource::setStatus(Status newStatus)
{
switch (newStatus) {
case Status::Pending:
ASSERT_NOT_REACHED();
break;
case Status::Loading:
ASSERT(status() == Status::Pending);
break;
case Status::Success:
ASSERT(status() == Status::Loading);
break;
case Status::Failure:
ASSERT(status() == Status::Loading);
break;
}
m_status = newStatus;
}
CSSFontFaceSource::CSSFontFaceSource(CSSFontFace& owner, AtomString fontFaceName)
: m_fontFaceName(WTFMove(fontFaceName))
, m_face(owner)
{
}
CSSFontFaceSource::CSSFontFaceSource(CSSFontFace& owner, CSSFontSelector& fontSelector, UniqueRef<FontLoadRequest> request)
: m_face(owner)
, m_fontSelector(fontSelector)
, m_fontRequest(request.moveToUniquePtr())
{
// This may synchronously call fontLoaded().
m_fontRequest->setClient(this);
if (status() == Status::Pending && !m_fontRequest->isPending()) {
setStatus(Status::Loading);
if (!shouldIgnoreFontLoadCompletions()) {
if (m_fontRequest->errorOccurred())
setStatus(Status::Failure);
else
setStatus(Status::Success);
}
}
}
CSSFontFaceSource::CSSFontFaceSource(CSSFontFace& owner, AtomString fontFaceName, SVGFontFaceElement& fontFace)
: m_fontFaceName(WTFMove(fontFaceName))
, m_face(owner)
, m_svgFontFaceElement(fontFace)
, m_hasSVGFontFaceElement(true)
{
}
CSSFontFaceSource::CSSFontFaceSource(CSSFontFace& owner, Ref<JSC::ArrayBufferView>&& arrayBufferView)
: m_face(owner)
, m_immediateSource(WTFMove(arrayBufferView))
{
}
CSSFontFaceSource::~CSSFontFaceSource()
{
if (m_fontRequest)
m_fontRequest->setClient(nullptr);
}
bool CSSFontFaceSource::shouldIgnoreFontLoadCompletions() const
{
return m_face.shouldIgnoreFontLoadCompletions();
}
void CSSFontFaceSource::opportunisticallyStartFontDataURLLoading()
{
if (status() == Status::Pending && m_fontRequest && m_fontRequest->url().protocolIsData() && m_fontRequest->url().string().length() < MB)
load();
}
void CSSFontFaceSource::fontLoaded(FontLoadRequest& fontRequest)
{
ASSERT_UNUSED(fontRequest, &fontRequest == m_fontRequest.get());
if (shouldIgnoreFontLoadCompletions())
return;
Ref<CSSFontFace> protectedFace(m_face);
// If the font is in the cache, this will be synchronously called from FontLoadRequest::addClient().
if (m_status == Status::Pending)
setStatus(Status::Loading);
else if (m_status == Status::Failure) {
// This function may be called twice if loading was cancelled.
ASSERT(m_fontRequest->errorOccurred());
return;
}
if (m_fontRequest->errorOccurred() || !m_fontRequest->ensureCustomFontData())
setStatus(Status::Failure);
else
setStatus(Status::Success);
m_face.fontLoaded(*this);
}
void CSSFontFaceSource::load(Document* document)
{
setStatus(Status::Loading);
if (m_fontRequest) {
ASSERT(m_fontSelector);
if (auto* context = m_fontSelector->scriptExecutionContext())
context->beginLoadingFontSoon(*m_fontRequest);
} else {
bool success = false;
if (m_hasSVGFontFaceElement) {
if (m_svgFontFaceElement && is<SVGFontElement>(m_svgFontFaceElement->parentNode())) {
ASSERT(!m_inDocumentCustomPlatformData);
SVGFontElement& fontElement = downcast<SVGFontElement>(*m_svgFontFaceElement->parentNode());
if (auto otfFont = convertSVGToOTFFont(fontElement))
m_generatedOTFBuffer = SharedBuffer::create(WTFMove(otfFont.value()));
if (m_generatedOTFBuffer) {
m_inDocumentCustomPlatformData = createFontCustomPlatformData(*m_generatedOTFBuffer, String());
success = static_cast<bool>(m_inDocumentCustomPlatformData);
}
}
} else if (m_immediateSource) {
ASSERT(!m_immediateFontCustomPlatformData);
bool wrapping;
auto buffer = SharedBuffer::create(static_cast<const char*>(m_immediateSource->baseAddress()), m_immediateSource->byteLength());
m_immediateFontCustomPlatformData = CachedFont::createCustomFontData(buffer.get(), String(), wrapping);
success = static_cast<bool>(m_immediateFontCustomPlatformData);
} else {
// We are only interested in whether or not fontForFamily() returns null or not. Luckily, none of
// the values in the FontDescription other than the family name can cause the function to return
// null if it wasn't going to otherwise (and vice-versa).
FontCascadeDescription fontDescription;
fontDescription.setOneFamily(m_fontFaceName);
fontDescription.setComputedSize(1);
fontDescription.setShouldAllowUserInstalledFonts(m_face.allowUserInstalledFonts());
success = FontCache::forCurrentThread().fontForFamily(fontDescription, m_fontFaceName, { }, true);
if (document && document->settings().webAPIStatisticsEnabled())
ResourceLoadObserver::shared().logFontLoad(*document, m_fontFaceName.string(), success);
}
setStatus(success ? Status::Success : Status::Failure);
}
}
RefPtr<Font> CSSFontFaceSource::font(const FontDescription& fontDescription, bool syntheticBold, bool syntheticItalic, const FontCreationContext& fontCreationContext)
{
ASSERT(status() == Status::Success);
bool usesInDocumentSVGFont = m_hasSVGFontFaceElement;
if (!m_fontRequest && !usesInDocumentSVGFont) {
if (m_immediateSource) {
if (!m_immediateFontCustomPlatformData)
return nullptr;
return Font::create(CachedFont::platformDataFromCustomData(*m_immediateFontCustomPlatformData, fontDescription, syntheticBold, syntheticItalic, fontCreationContext), Font::Origin::Remote);
}
// We're local. Just return a Font from the normal cache.
// We don't want to check alternate font family names here, so pass true as the checkingAlternateName parameter.
return FontCache::forCurrentThread().fontForFamily(fontDescription, m_fontFaceName, fontCreationContext, true);
}
if (m_fontRequest) {
auto success = m_fontRequest->ensureCustomFontData();
ASSERT_UNUSED(success, success);
ASSERT(status() == Status::Success);
auto result = m_fontRequest->createFont(fontDescription, syntheticBold, syntheticItalic, fontCreationContext);
ASSERT(result);
return result;
}
if (!usesInDocumentSVGFont)
return nullptr;
if (!m_svgFontFaceElement || !is<SVGFontElement>(m_svgFontFaceElement->parentNode()))
return nullptr;
if (!m_inDocumentCustomPlatformData)
return nullptr;
return Font::create(m_inDocumentCustomPlatformData->fontPlatformData(fontDescription, syntheticBold, syntheticItalic, fontCreationContext), Font::Origin::Remote);
}
bool CSSFontFaceSource::isSVGFontFaceSource() const
{
return m_hasSVGFontFaceElement || (is<CachedFontLoadRequest>(m_fontRequest) && is<CachedSVGFont>(downcast<CachedFontLoadRequest>(m_fontRequest.get())->cachedFont()));
}
}
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