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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "config.h"
#include "core/css/RemoteFontFaceSource.h"
#include "core/css/CSSCustomFontData.h"
#include "core/css/CSSFontFace.h"
#include "core/css/FontLoader.h"
#include "platform/fonts/FontCache.h"
#include "platform/fonts/FontDescription.h"
#include "platform/fonts/SimpleFontData.h"
#include "public/platform/Platform.h"
#include "wtf/CurrentTime.h"
namespace WebCore {
RemoteFontFaceSource::RemoteFontFaceSource(FontResource* font, PassRefPtrWillBeRawPtr<FontLoader> fontLoader)
: m_font(font)
, m_fontLoader(fontLoader)
{
m_font->addClient(this);
}
RemoteFontFaceSource::~RemoteFontFaceSource()
{
m_font->removeClient(this);
pruneTable();
}
void RemoteFontFaceSource::pruneTable()
{
if (m_fontDataTable.isEmpty())
return;
for (FontDataTable::iterator it = m_fontDataTable.begin(); it != m_fontDataTable.end(); ++it) {
SimpleFontData* fontData = it->value.get();
if (fontData && fontData->customFontData())
fontData->customFontData()->clearFontFaceSource();
}
m_fontDataTable.clear();
}
bool RemoteFontFaceSource::isLoading() const
{
return !m_font->stillNeedsLoad() && !m_font->isLoaded();
}
bool RemoteFontFaceSource::isLoaded() const
{
return m_font->isLoaded();
}
bool RemoteFontFaceSource::isValid() const
{
return !m_font->errorOccurred();
}
void RemoteFontFaceSource::didStartFontLoad(FontResource*)
{
// We may send duplicated reports when multiple CSSFontFaceSource are
// registered at this FontResource. Associating the same URL to different
// font-family causes the case, but we treat them as indivisual resources.
m_histograms.loadStarted();
}
void RemoteFontFaceSource::fontLoaded(FontResource*)
{
m_histograms.recordRemoteFont(m_font.get());
pruneTable();
if (m_face) {
m_fontLoader->fontFaceInvalidated();
m_face->fontLoaded(this);
}
}
void RemoteFontFaceSource::fontLoadWaitLimitExceeded(FontResource*)
{
pruneTable();
if (m_face) {
m_fontLoader->fontFaceInvalidated();
m_face->fontLoadWaitLimitExceeded(this);
}
m_histograms.recordFallbackTime(m_font.get());
}
PassRefPtr<SimpleFontData> RemoteFontFaceSource::createFontData(const FontDescription& fontDescription)
{
if (!isLoaded())
return createLoadingFallbackFontData(fontDescription);
// Create new FontPlatformData from our CGFontRef, point size and ATSFontRef.
if (!m_font->ensureCustomFontData())
return nullptr;
m_histograms.recordFallbackTime(m_font.get());
return SimpleFontData::create(
m_font->platformDataFromCustomData(fontDescription.effectiveFontSize(),
fontDescription.isSyntheticBold(), fontDescription.isSyntheticItalic(),
fontDescription.orientation(), fontDescription.widthVariant()), CustomFontData::create());
}
PassRefPtr<SimpleFontData> RemoteFontFaceSource::createLoadingFallbackFontData(const FontDescription& fontDescription)
{
// This temporary font is not retained and should not be returned.
FontCachePurgePreventer fontCachePurgePreventer;
SimpleFontData* temporaryFont = FontCache::fontCache()->getNonRetainedLastResortFallbackFont(fontDescription);
if (!temporaryFont) {
ASSERT_NOT_REACHED();
return nullptr;
}
RefPtr<CSSCustomFontData> cssFontData = CSSCustomFontData::create(this, m_font->exceedsFontLoadWaitLimit() ? CSSCustomFontData::VisibleFallback : CSSCustomFontData::InvisibleFallback);
return SimpleFontData::create(temporaryFont->platformData(), cssFontData);
}
void RemoteFontFaceSource::beginLoadIfNeeded()
{
if (m_font->stillNeedsLoad())
m_fontLoader->addFontToBeginLoading(m_font.get());
if (m_face)
m_face->didBeginLoad();
}
bool RemoteFontFaceSource::ensureFontData()
{
return m_font->ensureCustomFontData();
}
void RemoteFontFaceSource::trace(Visitor* visitor)
{
visitor->trace(m_fontLoader);
CSSFontFaceSource::trace(visitor);
}
void RemoteFontFaceSource::FontLoadHistograms::loadStarted()
{
if (!m_loadStartTime)
m_loadStartTime = currentTimeMS();
}
void RemoteFontFaceSource::FontLoadHistograms::fallbackFontPainted()
{
if (!m_fallbackPaintTime)
m_fallbackPaintTime = currentTimeMS();
}
void RemoteFontFaceSource::FontLoadHistograms::recordFallbackTime(const FontResource* font)
{
if (m_fallbackPaintTime <= 0)
return;
int duration = static_cast<int>(currentTimeMS() - m_fallbackPaintTime);
blink::Platform::current()->histogramCustomCounts("WebFont.BlankTextShownTime", duration, 0, 10000, 50);
m_fallbackPaintTime = -1;
}
void RemoteFontFaceSource::FontLoadHistograms::recordRemoteFont(const FontResource* font)
{
if (m_loadStartTime > 0 && font && !font->isLoading()) {
int duration = static_cast<int>(currentTimeMS() - m_loadStartTime);
blink::Platform::current()->histogramCustomCounts(histogramName(font), duration, 0, 10000, 50);
m_loadStartTime = -1;
enum { Miss, Hit, DataUrl, CacheHitEnumMax };
int histogramValue = font->url().protocolIsData() ? DataUrl
: font->response().wasCached() ? Hit
: Miss;
blink::Platform::current()->histogramEnumeration("WebFont.CacheHit", histogramValue, CacheHitEnumMax);
}
}
const char* RemoteFontFaceSource::FontLoadHistograms::histogramName(const FontResource* font)
{
if (font->errorOccurred())
return "WebFont.DownloadTime.LoadError";
unsigned size = font->encodedSize();
if (size < 10 * 1024)
return "WebFont.DownloadTime.0.Under10KB";
if (size < 50 * 1024)
return "WebFont.DownloadTime.1.10KBTo50KB";
if (size < 100 * 1024)
return "WebFont.DownloadTime.2.50KBTo100KB";
if (size < 1024 * 1024)
return "WebFont.DownloadTime.3.100KBTo1MB";
return "WebFont.DownloadTime.4.Over1MB";
}
} // namespace WebCore
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