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/*
* Copyright (C) 2013-2017 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 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 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 "FontGenericFamilies.h"
#include <wtf/CrossThreadCopier.h>
#include <wtf/Language.h>
namespace WebCore {
using namespace WebKitFontFamilyNames;
static bool setGenericFontFamilyForScript(ScriptFontFamilyMap& fontMap, const String& family, UScriptCode script)
{
if (family.isEmpty())
return fontMap.remove(static_cast<int>(script));
auto& familyInMap = fontMap.add(static_cast<int>(script), String { }).iterator->value;
if (familyInMap == family)
return false;
familyInMap = family;
return true;
}
static inline bool computeUserPrefersSimplified()
{
// FIXME: This is not passing ShouldMinimizeLanguages::No and then getting minimized languages,
// which may cause the matching below to fail.
for (auto& language : userPreferredLanguages()) {
if (equalLettersIgnoringASCIICase(language, "zh-tw"_s))
return false;
if (equalLettersIgnoringASCIICase(language, "zh-cn"_s))
return true;
}
return true;
}
static bool& cachedUserPrefersSimplified()
{
static bool cached = true;
return cached;
}
static void languageChanged(void*)
{
cachedUserPrefersSimplified() = computeUserPrefersSimplified();
}
static const String& genericFontFamilyForScript(const ScriptFontFamilyMap& fontMap, UScriptCode script)
{
ScriptFontFamilyMap::const_iterator it = fontMap.find(static_cast<int>(script));
if (it != fontMap.end())
return it->value;
// Content using USCRIPT_HAN doesn't tell us if we should be using Simplified Chinese or Traditional Chinese. In the
// absence of all other signals, we consult with the user's system preferences.
if (script == USCRIPT_HAN) {
it = fontMap.find(static_cast<int>(cachedUserPrefersSimplified() ? USCRIPT_SIMPLIFIED_HAN : USCRIPT_TRADITIONAL_HAN));
if (it != fontMap.end())
return it->value;
}
if (script != USCRIPT_COMMON)
return genericFontFamilyForScript(fontMap, USCRIPT_COMMON);
return emptyAtom();
}
FontGenericFamilies::FontGenericFamilies()
{
static std::once_flag once;
std::call_once(once, [&] {
addLanguageChangeObserver(&once, &languageChanged);
languageChanged(nullptr);
});
}
FontGenericFamilies FontGenericFamilies::isolatedCopy() const &
{
FontGenericFamilies copy;
copy.m_standardFontFamilyMap = crossThreadCopy(m_standardFontFamilyMap);
copy.m_serifFontFamilyMap = crossThreadCopy(m_serifFontFamilyMap);
copy.m_fixedFontFamilyMap = crossThreadCopy(m_fixedFontFamilyMap);
copy.m_sansSerifFontFamilyMap = crossThreadCopy(m_sansSerifFontFamilyMap);
copy.m_cursiveFontFamilyMap = crossThreadCopy(m_cursiveFontFamilyMap);
copy.m_fantasyFontFamilyMap = crossThreadCopy(m_fantasyFontFamilyMap);
copy.m_pictographFontFamilyMap = crossThreadCopy(m_pictographFontFamilyMap);
return copy;
}
FontGenericFamilies FontGenericFamilies::isolatedCopy() &&
{
FontGenericFamilies copy;
copy.m_standardFontFamilyMap = crossThreadCopy(WTFMove(m_standardFontFamilyMap));
copy.m_serifFontFamilyMap = crossThreadCopy(WTFMove(m_serifFontFamilyMap));
copy.m_fixedFontFamilyMap = crossThreadCopy(WTFMove(m_fixedFontFamilyMap));
copy.m_sansSerifFontFamilyMap = crossThreadCopy(WTFMove(m_sansSerifFontFamilyMap));
copy.m_cursiveFontFamilyMap = crossThreadCopy(WTFMove(m_cursiveFontFamilyMap));
copy.m_fantasyFontFamilyMap = crossThreadCopy(WTFMove(m_fantasyFontFamilyMap));
copy.m_pictographFontFamilyMap = crossThreadCopy(WTFMove(m_pictographFontFamilyMap));
return copy;
}
const String& FontGenericFamilies::standardFontFamily(UScriptCode script) const
{
return genericFontFamilyForScript(m_standardFontFamilyMap, script);
}
const String& FontGenericFamilies::fixedFontFamily(UScriptCode script) const
{
return genericFontFamilyForScript(m_fixedFontFamilyMap, script);
}
const String& FontGenericFamilies::serifFontFamily(UScriptCode script) const
{
return genericFontFamilyForScript(m_serifFontFamilyMap, script);
}
const String& FontGenericFamilies::sansSerifFontFamily(UScriptCode script) const
{
return genericFontFamilyForScript(m_sansSerifFontFamilyMap, script);
}
const String& FontGenericFamilies::cursiveFontFamily(UScriptCode script) const
{
return genericFontFamilyForScript(m_cursiveFontFamilyMap, script);
}
const String& FontGenericFamilies::fantasyFontFamily(UScriptCode script) const
{
return genericFontFamilyForScript(m_fantasyFontFamilyMap, script);
}
const String& FontGenericFamilies::pictographFontFamily(UScriptCode script) const
{
return genericFontFamilyForScript(m_pictographFontFamilyMap, script);
}
bool FontGenericFamilies::setStandardFontFamily(const String& family, UScriptCode script)
{
return setGenericFontFamilyForScript(m_standardFontFamilyMap, family, script);
}
bool FontGenericFamilies::setFixedFontFamily(const String& family, UScriptCode script)
{
return setGenericFontFamilyForScript(m_fixedFontFamilyMap, family, script);
}
bool FontGenericFamilies::setSerifFontFamily(const String& family, UScriptCode script)
{
return setGenericFontFamilyForScript(m_serifFontFamilyMap, family, script);
}
bool FontGenericFamilies::setSansSerifFontFamily(const String& family, UScriptCode script)
{
return setGenericFontFamilyForScript(m_sansSerifFontFamilyMap, family, script);
}
bool FontGenericFamilies::setCursiveFontFamily(const String& family, UScriptCode script)
{
return setGenericFontFamilyForScript(m_cursiveFontFamilyMap, family, script);
}
bool FontGenericFamilies::setFantasyFontFamily(const String& family, UScriptCode script)
{
return setGenericFontFamilyForScript(m_fantasyFontFamilyMap, family, script);
}
bool FontGenericFamilies::setPictographFontFamily(const String& family, UScriptCode script)
{
return setGenericFontFamilyForScript(m_pictographFontFamilyMap, family, script);
}
const String* FontGenericFamilies::fontFamily(FamilyNamesIndex family, UScriptCode script) const
{
switch (family) {
case FamilyNamesIndex::CursiveFamily:
return &cursiveFontFamily(script);
case FamilyNamesIndex::FantasyFamily:
return &fantasyFontFamily(script);
case FamilyNamesIndex::MonospaceFamily:
return &fixedFontFamily(script);
case FamilyNamesIndex::PictographFamily:
return &pictographFontFamily(script);
case FamilyNamesIndex::SansSerifFamily:
return &sansSerifFontFamily(script);
case FamilyNamesIndex::SerifFamily:
return &serifFontFamily(script);
case FamilyNamesIndex::StandardFamily:
return &standardFontFamily(script);
case FamilyNamesIndex::SystemUiFamily:
return nullptr;
}
ASSERT_NOT_REACHED();
return nullptr;
}
}