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/*
* Copyright (c) 2009, Google 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:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "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 THE COPYRIGHT
* OWNER 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.
*/
#ifndef THIRD_PARTY_BLINK_RENDERER_PLATFORM_FONTS_FONT_FACE_CREATION_PARAMS_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_FONTS_FONT_FACE_CREATION_PARAMS_H_
#include "base/check_op.h"
#include "build/build_config.h"
#include "third_party/blink/renderer/platform/wtf/allocator/allocator.h"
#include "third_party/blink/renderer/platform/wtf/text/atomic_string.h"
#include "third_party/blink/renderer/platform/wtf/text/case_folding_hash.h"
#include "third_party/blink/renderer/platform/wtf/text/string_hasher.h"
namespace blink {
enum FontFaceCreationType {
kCreateFontByFamily,
kCreateFontByFciIdAndTtcIndex
};
class FontFaceCreationParams {
USING_FAST_MALLOC(FontFaceCreationParams);
public:
FontFaceCreationParams() : creation_type_(kCreateFontByFamily) {}
explicit FontFaceCreationParams(AtomicString family)
: creation_type_(kCreateFontByFamily), family_(family) {
#if BUILDFLAG(IS_WIN)
// Leading "@" in the font name enables Windows vertical flow flag for the
// font. Because we do vertical flow by ourselves, we don't want to use the
// Windows feature. IE disregards "@" regardless of the orientation, so we
// follow the behavior and normalize the family name.
family_ = (family_.empty() || family_[0] != '@')
? family_
: AtomicString(family_.Impl()->Substring(1));
#endif
}
FontFaceCreationParams(const std::string& filename,
int fontconfig_interface_id,
int ttc_index = 0)
: creation_type_(kCreateFontByFciIdAndTtcIndex),
filename_(filename),
fontconfig_interface_id_(fontconfig_interface_id),
ttc_index_(ttc_index) {}
FontFaceCreationType CreationType() const { return creation_type_; }
const AtomicString& Family() const {
DCHECK_EQ(creation_type_, kCreateFontByFamily);
return family_;
}
const std::string& Filename() const {
DCHECK_EQ(creation_type_, kCreateFontByFciIdAndTtcIndex);
#if defined(ADDRESS_SANITIZER)
DCHECK(filename_.has_value());
return *filename_;
#else
return filename_;
#endif
}
int FontconfigInterfaceId() const {
DCHECK_EQ(creation_type_, kCreateFontByFciIdAndTtcIndex);
return fontconfig_interface_id_;
}
int TtcIndex() const {
DCHECK_EQ(creation_type_, kCreateFontByFciIdAndTtcIndex);
return ttc_index_;
}
unsigned GetHash() const {
if (creation_type_ == kCreateFontByFciIdAndTtcIndex) {
// Hashing the filename and ints in this way is sensitive to character
// encoding and endianness. However, since the hash is not transferred
// over a network or permanently stored and only used for the runtime of
// Chromium, this is not a concern.
struct HashData {
int index;
int id;
uint64_t filename_hash;
} hash_data = {ttc_index_, fontconfig_interface_id_,
HasFilename() ? StringHasher::HashMemory(
base::as_byte_span(Filename()))
: 0};
return StringHasher::HashMemory(base::byte_span_from_ref(hash_data));
}
return CaseFoldingHash::GetHash(family_.empty() ? g_empty_atom : family_);
}
bool operator==(const FontFaceCreationParams& other) const {
return creation_type_ == other.creation_type_ &&
DeprecatedEqualIgnoringCase(family_, other.family_) &&
FilenameEqual(other) &&
fontconfig_interface_id_ == other.fontconfig_interface_id_ &&
ttc_index_ == other.ttc_index_;
}
private:
FontFaceCreationType creation_type_;
AtomicString family_;
void SetFilename(std::string& filename) {
#if defined(ADDRESS_SANITIZER)
*filename_ = filename;
#else
filename_ = filename;
#endif
}
bool FilenameEqual(const FontFaceCreationParams& other) const {
#if defined(ADDRESS_SANITIZER)
if (!filename_.has_value() || !other.filename_.has_value()) {
return filename_.has_value() == other.filename_.has_value();
}
return *filename_ == *other.filename_;
#else
return filename_ == other.filename_;
#endif
}
bool HasFilename() const {
#if defined(ADDRESS_SANITIZER)
return filename_.has_value();
#else
return true;
#endif
}
#if defined(ADDRESS_SANITIZER)
// We put the `std::string` behind an optional as ASAN counter checks require
// that we properly call constructors and destructors for all strings. This is
// not the case when `FontFaceCreationParams` is used in `WTF::HashMap` as key
// where we also cosntruct empty and deleted values that are never properly
// destroyed.
//
// See crbug.com/346174906.
std::optional<std::string> filename_;
#else
std::string filename_;
#endif
int fontconfig_interface_id_ = 0;
int ttc_index_ = 0;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_PLATFORM_FONTS_FONT_FACE_CREATION_PARAMS_H_
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