| /* |
| * Copyright (C) 2007, 2008, 2010, 2011 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/CSSFontFaceSource.h" |
| |
| #include "RuntimeEnabledFeatures.h" |
| #include "core/css/CSSCustomFontData.h" |
| #include "core/css/CSSFontFace.h" |
| #include "core/css/CSSFontSelector.h" |
| #include "core/fetch/FontResource.h" |
| #include "core/platform/graphics/FontCache.h" |
| #include "core/platform/graphics/SimpleFontData.h" |
| #include "platform/fonts/FontDescription.h" |
| #include "public/platform/Platform.h" |
| #include "wtf/CurrentTime.h" |
| |
| #if ENABLE(SVG_FONTS) |
| #include "SVGNames.h" |
| #include "core/svg/SVGFontData.h" |
| #include "core/svg/SVGFontElement.h" |
| #include "core/svg/SVGFontFaceElement.h" |
| #endif |
| |
| namespace WebCore { |
| |
| CSSFontFaceSource::CSSFontFaceSource(const String& str, FontResource* font) |
| : m_string(str) |
| , m_font(font) |
| , m_face(0) |
| #if ENABLE(SVG_FONTS) |
| , m_hasExternalSVGFont(false) |
| #endif |
| { |
| if (m_font) |
| m_font->addClient(this); |
| } |
| |
| CSSFontFaceSource::~CSSFontFaceSource() |
| { |
| if (m_font) |
| m_font->removeClient(this); |
| pruneTable(); |
| } |
| |
| void CSSFontFaceSource::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()->clearCSSFontFaceSource(); |
| } |
| m_fontDataTable.clear(); |
| } |
| |
| bool CSSFontFaceSource::isLocal() const |
| { |
| if (m_font) |
| return false; |
| #if ENABLE(SVG_FONTS) |
| if (m_svgFontFaceElement) |
| return false; |
| #endif |
| return true; |
| } |
| |
| bool CSSFontFaceSource::isLoading() const |
| { |
| if (m_font) |
| return !m_font->stillNeedsLoad() && !m_font->isLoaded(); |
| return false; |
| } |
| |
| bool CSSFontFaceSource::isLoaded() const |
| { |
| if (m_font) |
| return m_font->isLoaded(); |
| return true; |
| } |
| |
| bool CSSFontFaceSource::isValid() const |
| { |
| if (m_font) |
| return !m_font->errorOccurred(); |
| return true; |
| } |
| |
| void CSSFontFaceSource::didStartFontLoad(FontResource*) |
| { |
| // Avoid duplicated reports when multiple CSSFontFaceSource are registered |
| // at this FontResource. |
| if (!m_fontDataTable.isEmpty()) |
| m_histograms.loadStarted(); |
| } |
| |
| void CSSFontFaceSource::fontLoaded(FontResource*) |
| { |
| if (!m_fontDataTable.isEmpty()) |
| m_histograms.recordRemoteFont(m_font.get()); |
| |
| pruneTable(); |
| if (m_face) |
| m_face->fontLoaded(this); |
| } |
| |
| PassRefPtr<SimpleFontData> CSSFontFaceSource::getFontData(const FontDescription& fontDescription, CSSFontSelector* fontSelector) |
| { |
| // If the font hasn't loaded or an error occurred, then we've got nothing. |
| if (!isValid()) |
| return 0; |
| |
| if (isLocal()) { |
| // We're local. Just return a SimpleFontData from the normal cache. |
| // We don't want to check alternate font family names here, so pass true as the checkingAlternateName parameter. |
| RefPtr<SimpleFontData> fontData = fontCache()->getFontResourceData(fontDescription, m_string, true); |
| m_histograms.recordLocalFont(fontData); |
| return fontData; |
| } |
| |
| // See if we have a mapping in our FontData cache. |
| AtomicString emptyFontFamily = ""; |
| FontCacheKey key = fontDescription.cacheKey(emptyFontFamily); |
| |
| RefPtr<SimpleFontData>& fontData = m_fontDataTable.add(key.hash(), 0).iterator->value; |
| if (fontData) |
| return fontData; // No release, because fontData is a reference to a RefPtr that is held in the m_fontDataTable. |
| |
| // If we are still loading, then we let the system pick a font. |
| if (isLoaded()) { |
| if (m_font) { |
| #if ENABLE(SVG_FONTS) |
| if (m_hasExternalSVGFont) { |
| // For SVG fonts parse the external SVG document, and extract the <font> element. |
| if (!m_font->ensureSVGFontData()) |
| return 0; |
| |
| if (!m_externalSVGFontElement) { |
| String fragmentIdentifier; |
| size_t start = m_string.find('#'); |
| if (start != kNotFound) |
| fragmentIdentifier = m_string.string().substring(start + 1); |
| m_externalSVGFontElement = m_font->getSVGFontById(fragmentIdentifier); |
| } |
| |
| if (!m_externalSVGFontElement) |
| return 0; |
| |
| SVGFontFaceElement* fontFaceElement = 0; |
| |
| // Select first <font-face> child |
| for (Node* fontChild = m_externalSVGFontElement->firstChild(); fontChild; fontChild = fontChild->nextSibling()) { |
| if (fontChild->hasTagName(SVGNames::font_faceTag)) { |
| fontFaceElement = toSVGFontFaceElement(fontChild); |
| break; |
| } |
| } |
| |
| if (fontFaceElement) { |
| if (!m_svgFontFaceElement) { |
| // We're created using a CSS @font-face rule, that means we're not associated with a SVGFontFaceElement. |
| // Use the imported <font-face> tag as referencing font-face element for these cases. |
| m_svgFontFaceElement = fontFaceElement; |
| } |
| |
| fontData = SimpleFontData::create( |
| SVGFontData::create(fontFaceElement), |
| fontDescription.effectiveFontSize(), |
| fontDescription.isSyntheticBold(), |
| fontDescription.isSyntheticItalic()); |
| } |
| } else |
| #endif |
| { |
| // Create new FontPlatformData from our CGFontRef, point size and ATSFontRef. |
| if (!m_font->ensureCustomFontData()) |
| return 0; |
| |
| fontData = SimpleFontData::create( |
| m_font->platformDataFromCustomData(fontDescription.effectiveFontSize(), |
| fontDescription.isSyntheticBold(), fontDescription.isSyntheticItalic(), |
| fontDescription.orientation(), fontDescription.widthVariant()), CustomFontData::create(false)); |
| } |
| } else { |
| #if ENABLE(SVG_FONTS) |
| // In-Document SVG Fonts |
| if (m_svgFontFaceElement) { |
| fontData = SimpleFontData::create( |
| SVGFontData::create(m_svgFontFaceElement.get()), |
| fontDescription.effectiveFontSize(), |
| fontDescription.isSyntheticBold(), |
| fontDescription.isSyntheticItalic()); |
| } |
| #endif |
| } |
| } else { |
| // This temporary font is not retained and should not be returned. |
| FontCachePurgePreventer fontCachePurgePreventer; |
| SimpleFontData* temporaryFont = fontCache()->getNonRetainedLastResortFallbackFont(fontDescription); |
| RefPtr<CSSCustomFontData> cssFontData = CSSCustomFontData::create(true); |
| cssFontData->setCSSFontFaceSource(this); |
| fontData = SimpleFontData::create(temporaryFont->platformData(), cssFontData); |
| } |
| |
| return fontData; // No release, because fontData is a reference to a RefPtr that is held in the m_fontDataTable. |
| } |
| |
| #if ENABLE(SVG_FONTS) |
| SVGFontFaceElement* CSSFontFaceSource::svgFontFaceElement() const |
| { |
| return m_svgFontFaceElement.get(); |
| } |
| |
| void CSSFontFaceSource::setSVGFontFaceElement(PassRefPtr<SVGFontFaceElement> element) |
| { |
| m_svgFontFaceElement = element; |
| } |
| |
| bool CSSFontFaceSource::isSVGFontFaceSource() const |
| { |
| return m_svgFontFaceElement || m_hasExternalSVGFont; |
| } |
| #endif |
| |
| bool CSSFontFaceSource::ensureFontData() |
| { |
| if (!m_font) |
| return false; |
| #if ENABLE(SVG_FONTS) |
| if (m_hasExternalSVGFont) |
| return m_font->ensureSVGFontData(); |
| #endif |
| return m_font->ensureCustomFontData(); |
| } |
| |
| bool CSSFontFaceSource::isLocalFontAvailable(const FontDescription& fontDescription) |
| { |
| if (!isLocal()) |
| return false; |
| return fontCache()->isPlatformFontAvailable(fontDescription, m_string); |
| } |
| |
| void CSSFontFaceSource::willUseFontData() |
| { |
| if (m_face && m_font && m_font->stillNeedsLoad()) |
| beginLoadingFontSoon(); |
| } |
| |
| void CSSFontFaceSource::beginLoadingFontSoon() |
| { |
| ASSERT(m_face); |
| ASSERT(m_font); |
| m_face->beginLoadingFontSoon(m_font.get()); |
| } |
| |
| void CSSFontFaceSource::FontLoadHistograms::loadStarted() |
| { |
| if (!m_loadStartTime) |
| m_loadStartTime = currentTimeMS(); |
| } |
| |
| void CSSFontFaceSource::FontLoadHistograms::recordLocalFont(bool loadSuccess) |
| { |
| if (!m_loadStartTime) { |
| blink::Platform::current()->histogramEnumeration("WebFont.LocalFontUsed", loadSuccess ? 1 : 0, 2); |
| m_loadStartTime = -1; // Do not count this font again. |
| } |
| } |
| |
| void CSSFontFaceSource::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* CSSFontFaceSource::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"; |
| } |
| |
| } |
