| /* |
| * 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 "core/css/CSSFontFace.h" |
| #include "core/css/CSSFontSelector.h" |
| #include "core/loader/cache/CachedFont.h" |
| #include "core/platform/HistogramSupport.h" |
| #include "core/platform/graphics/FontCache.h" |
| #include "core/platform/graphics/FontDescription.h" |
| #include "core/platform/graphics/SimpleFontData.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, CachedFont* 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; |
| |
| m_fontDataTable.clear(); |
| } |
| |
| 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::fontLoaded(CachedFont*) |
| { |
| pruneTable(); |
| if (m_face) |
| m_face->fontLoaded(this); |
| m_histograms.recordRemoteFont(m_font.get()); |
| } |
| |
| PassRefPtr<SimpleFontData> CSSFontFaceSource::getFontData(const FontDescription& fontDescription, bool syntheticBold, bool syntheticItalic, CSSFontSelector* fontSelector) |
| { |
| // If the font hasn't loaded or an error occurred, then we've got nothing. |
| if (!isValid()) |
| return 0; |
| |
| if (!m_font |
| #if ENABLE(SVG_FONTS) |
| && !m_svgFontFaceElement |
| #endif |
| ) { |
| // 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()->getCachedFontData(fontDescription, m_string, true); |
| m_histograms.recordLocalFont(fontData); |
| return fontData; |
| } |
| |
| // See if we have a mapping in our FontData cache. |
| unsigned hashKey = (fontDescription.computedPixelSize() + 1) << 5 | fontDescription.widthVariant() << 3 |
| | (fontDescription.orientation() == Vertical ? 4 : 0) | (syntheticBold ? 2 : 0) | (syntheticItalic ? 1 : 0); |
| |
| RefPtr<SimpleFontData>& fontData = m_fontDataTable.add(hashKey, 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 != notFound) |
| 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 = static_cast<SVGFontFaceElement*>(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.computedPixelSize(), syntheticBold, syntheticItalic); |
| } |
| } 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.computedPixelSize(), syntheticBold, syntheticItalic, |
| fontDescription.orientation(), fontDescription.widthVariant()), true, false); |
| } |
| } else { |
| #if ENABLE(SVG_FONTS) |
| // In-Document SVG Fonts |
| if (m_svgFontFaceElement) |
| fontData = SimpleFontData::create(SVGFontData::create(m_svgFontFaceElement.get()), fontDescription.computedPixelSize(), syntheticBold, syntheticItalic); |
| #endif |
| } |
| } else { |
| // Kick off the load. Do it soon rather than now, because we may be in the middle of layout, |
| // and the loader may invoke arbitrary delegate or event handler code. |
| fontSelector->beginLoadingFontSoon(m_font.get()); |
| |
| m_histograms.loadStarted(); |
| |
| // This temporary font is not retained and should not be returned. |
| FontCachePurgePreventer fontCachePurgePreventer; |
| SimpleFontData* temporaryFont = fontCache()->getNonRetainedLastResortFallbackFont(fontDescription); |
| fontData = SimpleFontData::create(temporaryFont->platformData(), true, true); |
| } |
| |
| 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::isDecodeError() const |
| { |
| if (m_font) |
| return m_font->status() == Resource::DecodeError; |
| return false; |
| } |
| |
| bool CSSFontFaceSource::ensureFontData() |
| { |
| if (!m_font) |
| return false; |
| #if ENABLE(SVG_FONTS) |
| if (m_hasExternalSVGFont) |
| return m_font->ensureSVGFontData(); |
| #endif |
| return m_font->ensureCustomFontData(); |
| } |
| |
| void CSSFontFaceSource::FontLoadHistograms::loadStarted() |
| { |
| if (!m_loadStartTime) |
| m_loadStartTime = currentTimeMS(); |
| } |
| |
| void CSSFontFaceSource::FontLoadHistograms::recordLocalFont(bool loadSuccess) |
| { |
| if (!m_loadStartTime) { |
| HistogramSupport::histogramEnumeration("WebFont.LocalFontUsed", loadSuccess ? 1 : 0, 2); |
| m_loadStartTime = -1; // Do not count this font again. |
| } |
| } |
| |
| void CSSFontFaceSource::FontLoadHistograms::recordRemoteFont(const CachedFont* font) |
| { |
| if (m_loadStartTime > 0 && font && !font->isLoading()) { |
| int duration = static_cast<int>(currentTimeMS() - m_loadStartTime); |
| HistogramSupport::histogramCustomCounts(histogramName(font), duration, 0, 10000, 50); |
| m_loadStartTime = -1; |
| } |
| } |
| |
| const char* CSSFontFaceSource::FontLoadHistograms::histogramName(const CachedFont* font) |
| { |
| if (font->errorOccurred()) |
| return "WebFont.LoadTime.LoadError"; |
| |
| unsigned size = font->encodedSize(); |
| if (size < 10 * 1024) |
| return "WebFont.LoadTime.0.Under10KB"; |
| if (size < 50 * 1024) |
| return "WebFont.LoadTime.1.10KBTo50KB"; |
| if (size < 100 * 1024) |
| return "WebFont.LoadTime.2.50KBTo100KB"; |
| if (size < 1024 * 1024) |
| return "WebFont.LoadTime.3.100KBTo1MB"; |
| return "WebFont.LoadTime.4.Over1MB"; |
| } |
| |
| } |
