| /* |
| * Copyright (C) 2007, 2008, 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/CSSFontFace.h" |
| |
| #include "core/css/CSSFontFaceSource.h" |
| #include "core/css/CSSFontSelector.h" |
| #include "core/css/CSSSegmentedFontFace.h" |
| #include "core/css/FontFaceSet.h" |
| #include "core/css/RemoteFontFaceSource.h" |
| #include "core/frame/UseCounter.h" |
| #include "platform/fonts/FontDescription.h" |
| #include "platform/fonts/SimpleFontData.h" |
| |
| namespace blink { |
| |
| void CSSFontFace::addSource(PassOwnPtrWillBeRawPtr<CSSFontFaceSource> source) |
| { |
| source->setFontFace(this); |
| m_sources.append(source); |
| } |
| |
| void CSSFontFace::setSegmentedFontFace(CSSSegmentedFontFace* segmentedFontFace) |
| { |
| ASSERT(!m_segmentedFontFace); |
| m_segmentedFontFace = segmentedFontFace; |
| } |
| |
| void CSSFontFace::didBeginLoad() |
| { |
| if (loadStatus() == FontFace::Unloaded) |
| setLoadStatus(FontFace::Loading); |
| } |
| |
| void CSSFontFace::fontLoaded(RemoteFontFaceSource* source) |
| { |
| if (!isValid() || source != m_sources.first()) |
| return; |
| |
| if (loadStatus() == FontFace::Loading) { |
| if (source->ensureFontData()) { |
| setLoadStatus(FontFace::Loaded); |
| #if ENABLE(SVG_FONTS) |
| Document* document = m_segmentedFontFace ? m_segmentedFontFace->fontSelector()->document() : 0; |
| if (document && source->isSVGFontFaceSource()) |
| UseCounter::count(*document, UseCounter::SVGFontInCSS); |
| #endif |
| } else { |
| m_sources.removeFirst(); |
| load(); |
| } |
| } |
| |
| if (m_segmentedFontFace) |
| m_segmentedFontFace->fontLoaded(this); |
| } |
| |
| void CSSFontFace::fontLoadWaitLimitExceeded(RemoteFontFaceSource* source) |
| { |
| if (!isValid() || source != m_sources.first()) |
| return; |
| if (m_segmentedFontFace) |
| m_segmentedFontFace->fontLoadWaitLimitExceeded(this); |
| } |
| |
| PassRefPtr<SimpleFontData> CSSFontFace::getFontData(const FontDescription& fontDescription) |
| { |
| if (!isValid()) |
| return nullptr; |
| |
| while (!m_sources.isEmpty()) { |
| OwnPtrWillBeMember<CSSFontFaceSource>& source = m_sources.first(); |
| if (RefPtr<SimpleFontData> result = source->getFontData(fontDescription)) { |
| if (loadStatus() == FontFace::Unloaded && (source->isLoading() || source->isLoaded())) |
| setLoadStatus(FontFace::Loading); |
| if (loadStatus() == FontFace::Loading && source->isLoaded()) |
| setLoadStatus(FontFace::Loaded); |
| return result.release(); |
| } |
| m_sources.removeFirst(); |
| } |
| |
| if (loadStatus() == FontFace::Unloaded) |
| setLoadStatus(FontFace::Loading); |
| if (loadStatus() == FontFace::Loading) |
| setLoadStatus(FontFace::Error); |
| return nullptr; |
| } |
| |
| bool CSSFontFace::maybeScheduleFontLoad(const FontDescription& fontDescription, UChar32 character) |
| { |
| if (m_ranges.contains(character)) { |
| if (loadStatus() == FontFace::Unloaded) |
| load(fontDescription); |
| return true; |
| } |
| return false; |
| } |
| |
| void CSSFontFace::load() |
| { |
| FontDescription fontDescription; |
| FontFamily fontFamily; |
| fontFamily.setFamily(m_fontFace->family()); |
| fontDescription.setFamily(fontFamily); |
| fontDescription.setTraits(m_fontFace->traits()); |
| load(fontDescription); |
| } |
| |
| void CSSFontFace::load(const FontDescription& fontDescription) |
| { |
| if (loadStatus() == FontFace::Unloaded) |
| setLoadStatus(FontFace::Loading); |
| ASSERT(loadStatus() == FontFace::Loading); |
| |
| while (!m_sources.isEmpty()) { |
| OwnPtrWillBeMember<CSSFontFaceSource>& source = m_sources.first(); |
| if (source->isValid()) { |
| if (source->isLocal()) { |
| if (source->isLocalFontAvailable(fontDescription)) { |
| setLoadStatus(FontFace::Loaded); |
| return; |
| } |
| } else { |
| if (!source->isLoaded()) |
| source->beginLoadIfNeeded(); |
| else |
| setLoadStatus(FontFace::Loaded); |
| return; |
| } |
| } |
| m_sources.removeFirst(); |
| } |
| setLoadStatus(FontFace::Error); |
| } |
| |
| void CSSFontFace::setLoadStatus(FontFace::LoadStatus newStatus) |
| { |
| ASSERT(m_fontFace); |
| if (newStatus == FontFace::Error) |
| m_fontFace->setError(); |
| else |
| m_fontFace->setLoadStatus(newStatus); |
| |
| if (!m_segmentedFontFace) |
| return; |
| Document* document = m_segmentedFontFace->fontSelector()->document(); |
| if (!document) |
| return; |
| |
| switch (newStatus) { |
| case FontFace::Loading: |
| FontFaceSet::from(*document)->beginFontLoading(m_fontFace); |
| break; |
| case FontFace::Loaded: |
| FontFaceSet::from(*document)->fontLoaded(m_fontFace); |
| break; |
| case FontFace::Error: |
| FontFaceSet::from(*document)->loadError(m_fontFace); |
| break; |
| default: |
| break; |
| } |
| } |
| |
| CSSFontFace::UnicodeRangeSet::UnicodeRangeSet(const Vector<UnicodeRange>& ranges) |
| : m_ranges(ranges) |
| { |
| if (m_ranges.isEmpty()) |
| return; |
| |
| std::sort(m_ranges.begin(), m_ranges.end()); |
| |
| // Unify overlapping ranges. |
| UChar32 from = m_ranges[0].from(); |
| UChar32 to = m_ranges[0].to(); |
| size_t targetIndex = 0; |
| for (size_t i = 1; i < m_ranges.size(); i++) { |
| if (to + 1 >= m_ranges[i].from()) { |
| to = std::max(to, m_ranges[i].to()); |
| } else { |
| m_ranges[targetIndex++] = UnicodeRange(from, to); |
| from = m_ranges[i].from(); |
| to = m_ranges[i].to(); |
| } |
| } |
| m_ranges[targetIndex++] = UnicodeRange(from, to); |
| m_ranges.shrink(targetIndex); |
| } |
| |
| bool CSSFontFace::UnicodeRangeSet::contains(UChar32 c) const |
| { |
| if (isEntireRange()) |
| return true; |
| Vector<UnicodeRange>::const_iterator it = std::lower_bound(m_ranges.begin(), m_ranges.end(), c); |
| return it != m_ranges.end() && it->contains(c); |
| } |
| |
| bool CSSFontFace::UnicodeRangeSet::intersectsWith(const String& text) const |
| { |
| if (text.isEmpty()) |
| return false; |
| if (isEntireRange()) |
| return true; |
| if (text.is8Bit() && m_ranges[0].from() >= 0x100) |
| return false; |
| |
| unsigned index = 0; |
| while (index < text.length()) { |
| UChar32 c = text.characterStartingAt(index); |
| index += U16_LENGTH(c); |
| if (contains(c)) |
| return true; |
| } |
| return false; |
| } |
| |
| void CSSFontFace::trace(Visitor* visitor) |
| { |
| visitor->trace(m_segmentedFontFace); |
| visitor->trace(m_sources); |
| visitor->trace(m_fontFace); |
| } |
| |
| } |