| /* |
| * Copyright (C) 2007, 2008, 2011 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 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/CSSFontSelector.h" |
| |
| #include "core/css/CSSFontSelectorClient.h" |
| #include "core/css/CSSSegmentedFontFace.h" |
| #include "core/css/CSSValueList.h" |
| #include "core/css/FontFaceSet.h" |
| #include "core/css/resolver/StyleResolver.h" |
| #include "core/dom/Document.h" |
| #include "core/frame/LocalFrame.h" |
| #include "core/frame/Settings.h" |
| #include "core/loader/FrameLoader.h" |
| #include "platform/RuntimeEnabledFeatures.h" |
| #include "platform/fonts/FontCache.h" |
| #include "platform/fonts/SimpleFontData.h" |
| #include "wtf/text/AtomicString.h" |
| |
| namespace blink { |
| |
| CSSFontSelector::CSSFontSelector(Document* document) |
| : m_document(document) |
| , m_fontLoader(FontLoader::create(this, document->fetcher())) |
| , m_genericFontFamilySettings(document->frame()->settings()->genericFontFamilySettings()) |
| { |
| // FIXME: An old comment used to say there was no need to hold a reference to m_document |
| // because "we are guaranteed to be destroyed before the document". But there does not |
| // seem to be any such guarantee. |
| |
| ASSERT(m_document); |
| ASSERT(m_document->frame()); |
| FontCache::fontCache()->addClient(this); |
| FontFaceSet::from(*document)->addFontFacesToFontFaceCache(&m_fontFaceCache, this); |
| } |
| |
| CSSFontSelector::~CSSFontSelector() |
| { |
| #if !ENABLE(OILPAN) |
| clearDocument(); |
| FontCache::fontCache()->removeClient(this); |
| #endif |
| } |
| |
| void CSSFontSelector::registerForInvalidationCallbacks(CSSFontSelectorClient* client) |
| { |
| m_clients.add(client); |
| } |
| |
| #if !ENABLE(OILPAN) |
| void CSSFontSelector::unregisterForInvalidationCallbacks(CSSFontSelectorClient* client) |
| { |
| m_clients.remove(client); |
| } |
| #endif |
| |
| void CSSFontSelector::dispatchInvalidationCallbacks() |
| { |
| WillBeHeapVector<RawPtrWillBeMember<CSSFontSelectorClient> > clients; |
| copyToVector(m_clients, clients); |
| for (size_t i = 0; i < clients.size(); ++i) |
| clients[i]->fontsNeedUpdate(this); |
| } |
| |
| void CSSFontSelector::fontFaceInvalidated() |
| { |
| dispatchInvalidationCallbacks(); |
| } |
| |
| void CSSFontSelector::fontCacheInvalidated() |
| { |
| dispatchInvalidationCallbacks(); |
| } |
| |
| static AtomicString familyNameFromSettings(const GenericFontFamilySettings& settings, const FontDescription& fontDescription, const AtomicString& genericFamilyName) |
| { |
| #if OS(ANDROID) |
| if (fontDescription.genericFamily() == FontDescription::StandardFamily) |
| return FontCache::getGenericFamilyNameForScript(FontFamilyNames::webkit_standard, fontDescription); |
| |
| if (genericFamilyName.startsWith("-webkit-")) |
| return FontCache::getGenericFamilyNameForScript(genericFamilyName, fontDescription); |
| #else |
| UScriptCode script = fontDescription.script(); |
| if (fontDescription.genericFamily() == FontDescription::StandardFamily) |
| return settings.standard(script); |
| if (genericFamilyName == FontFamilyNames::webkit_serif) |
| return settings.serif(script); |
| if (genericFamilyName == FontFamilyNames::webkit_sans_serif) |
| return settings.sansSerif(script); |
| if (genericFamilyName == FontFamilyNames::webkit_cursive) |
| return settings.cursive(script); |
| if (genericFamilyName == FontFamilyNames::webkit_fantasy) |
| return settings.fantasy(script); |
| if (genericFamilyName == FontFamilyNames::webkit_monospace) |
| return settings.fixed(script); |
| if (genericFamilyName == FontFamilyNames::webkit_pictograph) |
| return settings.pictograph(script); |
| if (genericFamilyName == FontFamilyNames::webkit_standard) |
| return settings.standard(script); |
| #endif |
| return emptyAtom; |
| } |
| |
| PassRefPtr<FontData> CSSFontSelector::getFontData(const FontDescription& fontDescription, const AtomicString& familyName) |
| { |
| if (CSSSegmentedFontFace* face = m_fontFaceCache.get(fontDescription, familyName)) |
| return face->getFontData(fontDescription); |
| |
| // Try to return the correct font based off our settings, in case we were handed the generic font family name. |
| AtomicString settingsFamilyName = familyNameFromSettings(m_genericFontFamilySettings, fontDescription, familyName); |
| if (settingsFamilyName.isEmpty()) |
| return nullptr; |
| |
| return FontCache::fontCache()->getFontData(fontDescription, settingsFamilyName); |
| } |
| |
| void CSSFontSelector::willUseFontData(const FontDescription& fontDescription, const AtomicString& family, UChar32 character) |
| { |
| CSSSegmentedFontFace* face = m_fontFaceCache.get(fontDescription, family); |
| if (face) |
| face->willUseFontData(fontDescription, character); |
| } |
| |
| bool CSSFontSelector::isPlatformFontAvailable(const FontDescription& fontDescription, const AtomicString& passedFamily) |
| { |
| AtomicString family = familyNameFromSettings(m_genericFontFamilySettings, fontDescription, passedFamily); |
| if (family.isEmpty()) |
| family = passedFamily; |
| return FontCache::fontCache()->isPlatformFontAvailable(fontDescription, family); |
| } |
| |
| #if !ENABLE(OILPAN) |
| void CSSFontSelector::clearDocument() |
| { |
| m_fontLoader->clearResourceFetcherAndFontSelector(); |
| m_document = nullptr; |
| m_fontFaceCache.clearAll(); |
| } |
| #endif |
| |
| void CSSFontSelector::updateGenericFontFamilySettings(Document& document) |
| { |
| if (!document.settings()) |
| return; |
| m_genericFontFamilySettings = document.settings()->genericFontFamilySettings(); |
| // Need to increment FontFaceCache version to update RenderStyles. |
| m_fontFaceCache.incrementVersion(); |
| } |
| |
| void CSSFontSelector::trace(Visitor* visitor) |
| { |
| #if ENABLE(OILPAN) |
| visitor->trace(m_document); |
| visitor->trace(m_fontFaceCache); |
| visitor->trace(m_clients); |
| visitor->trace(m_fontLoader); |
| #endif |
| FontSelector::trace(visitor); |
| } |
| |
| } |