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/*
* Copyright (C) 2021 Metrological Group B.V.
* Copyright (C) 2021 Igalia S.L.
* Copyright (C) 2007, 2008, 2011, 2013 Apple Inc. All rights reserved.
* (C) 2007, 2008 Nikolas Zimmermann <zimmermann@kde.org>
*
* 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. AND ITS CONTRIBUTORS ``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 ITS 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 "DocumentFontLoader.h"
#include "CSSFontSelector.h"
#include "CachedFont.h"
#include "CachedResourceLoader.h"
#include "CachedResourceRequest.h"
#include "CachedResourceRequestInitiatorTypes.h"
#include "FrameDestructionObserverInlines.h"
#include "FrameLoader.h"
#include "LocalFrame.h"
namespace WebCore {
DocumentFontLoader::DocumentFontLoader(Document& document)
: m_document(document)
, m_fontLoadingTimer(*this, &DocumentFontLoader::fontLoadingTimerFired)
{
}
DocumentFontLoader::~DocumentFontLoader()
{
stopLoadingAndClearFonts();
}
CachedFont* DocumentFontLoader::cachedFont(URL&& url, bool isSVG, bool isInitiatingElementInUserAgentShadowTree, LoadedFromOpaqueSource loadedFromOpaqueSource)
{
ResourceLoaderOptions options = CachedResourceLoader::defaultCachedResourceOptions();
options.contentSecurityPolicyImposition = isInitiatingElementInUserAgentShadowTree ? ContentSecurityPolicyImposition::SkipPolicyCheck : ContentSecurityPolicyImposition::DoPolicyCheck;
options.loadedFromOpaqueSource = loadedFromOpaqueSource;
CachedResourceRequest request(ResourceRequest(WTFMove(url)), options);
request.setInitiatorType(cachedResourceRequestInitiatorTypes().css);
return m_document.cachedResourceLoader().requestFont(WTFMove(request), isSVG).value_or(nullptr).get();
}
void DocumentFontLoader::beginLoadingFontSoon(CachedFont& font)
{
if (m_isStopped)
return;
m_fontsToBeginLoading.append(&font);
// Increment the request count now, in order to prevent didFinishLoad from being dispatched
// after this font has been requested but before it began loading. Balanced by
// decrementRequestCount() in fontLoadingTimerFired() and in stopLoadingAndClearFonts().
m_document.cachedResourceLoader().incrementRequestCount(font);
if (!m_isFontLoadingSuspended && !m_fontLoadingTimer.isActive())
m_fontLoadingTimer.startOneShot(0_s);
}
void DocumentFontLoader::loadPendingFonts()
{
if (m_isFontLoadingSuspended)
return;
Vector<CachedResourceHandle<CachedFont>> fontsToBeginLoading;
fontsToBeginLoading.swap(m_fontsToBeginLoading);
auto& cachedResourceLoader = m_document.cachedResourceLoader();
for (auto& fontHandle : fontsToBeginLoading) {
fontHandle->beginLoadIfNeeded(cachedResourceLoader);
// Balances incrementRequestCount() in beginLoadingFontSoon().
cachedResourceLoader.decrementRequestCount(*fontHandle);
}
}
void DocumentFontLoader::fontLoadingTimerFired()
{
loadPendingFonts();
// FIXME: Use SubresourceLoader instead.
// Call FrameLoader::loadDone before FrameLoader::subresourceLoadDone to match the order in SubresourceLoader::notifyDone.
m_document.cachedResourceLoader().loadDone(LoadCompletionType::Finish);
// Ensure that if the request count reaches zero, the frame loader will know about it.
// New font loads may be triggered by layout after the document load is complete but before we have dispatched
// didFinishLoading for the frame. Make sure the delegate is always dispatched by checking explicitly.
if (m_document.frame())
m_document.frame()->loader().checkLoadComplete();
}
void DocumentFontLoader::stopLoadingAndClearFonts()
{
if (m_isStopped)
return;
m_fontLoadingTimer.stop();
auto& cachedResourceLoader = m_document.cachedResourceLoader();
for (auto& fontHandle : m_fontsToBeginLoading) {
// Balances incrementRequestCount() in beginLoadingFontSoon().
cachedResourceLoader.decrementRequestCount(*fontHandle);
}
m_fontsToBeginLoading.clear();
m_document.fontSelector().clearFonts();
m_isFontLoadingSuspended = true;
m_isStopped = true;
}
void DocumentFontLoader::suspendFontLoading()
{
if (m_isFontLoadingSuspended)
return;
m_fontLoadingTimer.stop();
m_isFontLoadingSuspended = true;
}
void DocumentFontLoader::resumeFontLoading()
{
if (!m_isFontLoadingSuspended || m_isStopped)
return;
m_isFontLoadingSuspended = false;
if (!m_fontsToBeginLoading.isEmpty())
m_fontLoadingTimer.startOneShot(0_s);
}
} // namespace WebCore
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