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/*
Copyright (C) 2026 Carl Hetherington <cth@carlh.net>
This file is part of libttf.
libttf is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
libttf is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with libttf. If not, see <http://www.gnu.org/licenses/>.
*/
#include "name_table.h"
#include "tags.h"
#include "util.h"
#include <boost/variant2/variant.hpp>
using namespace ttf;
NameTable::NameTable(Source& source, int header_index)
: Table(source, header_index)
{
Source table_source(source, _offset);
_format = table_source.get_uint16();
auto const count = table_source.get_uint16();
auto const string_offset = table_source.get_uint16();
for (auto i = 0; i < count; ++i) {
auto string_source = Source(source, _offset + string_offset);
_name_records.push_back(NameRecord(table_source, string_source, i));
}
std::sort(_name_records.begin(), _name_records.end(), [](NameRecord const& a, NameRecord const& b) { return a.original_offset < b.original_offset; });
}
void
NameTable::write(Sink& header_sink, Sink&& data_sink) const
{
{
auto const string_offset = static_cast<uint16_t>(6 + _name_records.size() * 12);
SubSink string_sink(data_sink, string_offset);
data_sink.put(_format);
data_sink.put(static_cast<uint16_t>(_name_records.size()));
data_sink.put(string_offset);
auto const name_records = data_sink.offset();
for (auto name: _name_records) {
data_sink.set_offset(name_records + name.header_index * 12);
name.write(data_sink, string_sink);
}
string_sink.pad();
}
header_sink.put(NAME);
header_sink.put(data_sink.checksum(data_sink.initial_offset()));
header_sink.put(data_sink.initial_offset());
header_sink.put(data_sink.offset_from_initial());
}
/** @param string_offset Offset of the string table within the font */
NameTable::NameRecord::NameRecord(Source& table_source, Source& string_source, int header_index)
: header_index(header_index)
, platform_id(table_source.get_uint16())
, platform_specific_id(table_source.get_uint16())
, language_id(table_source.get_uint16())
, name_id(table_source.get_uint16())
{
auto const length = table_source.get_uint16();
original_offset = table_source.get_uint16();
switch (platform_id) {
case 1: /* Macintosh */
name = string_source.get_string(original_offset, length);
break;
case 0: /* Unicode (16BE) */
case 3: /* Microsoft */
{
name = string_source.get_wstring(original_offset, length);
break;
}
default:
throw UnsupportedPlatformIdentifier(platform_id);
};
}
NameTable::NameRecord::NameRecord(int header_index_, uint16_t platform_id_, uint16_t platform_specific_id_, uint16_t language_id_, Identifier name_id_, std::string name_)
: header_index(header_index_)
, platform_id(platform_id_)
, platform_specific_id(platform_specific_id_)
, language_id(language_id_)
, name_id(static_cast<uint16_t>(name_id_))
, name(name_)
{
}
NameTable::NameRecord::NameRecord(int header_index_, uint16_t platform_id_, uint16_t platform_specific_id_, uint16_t language_id_, Identifier name_id_, std::wstring name_)
: header_index(header_index_)
, platform_id(platform_id_)
, platform_specific_id(platform_specific_id_)
, language_id(language_id_)
, name_id(static_cast<uint16_t>(name_id_))
, name(name_)
{
}
std::vector<NameTable::Name>
NameTable::names(NameTable::Identifier id) const
{
std::vector<NameTable::Name> result;
for (auto const& record: _name_records) {
if (record.name_id == static_cast<uint16_t>(id)) {
result.push_back(record.name);
}
}
return result;
}
void
NameTable::set_names(NameTable::Identifier id, std::string const& name, std::wstring const& wname)
{
for (auto& record: _name_records) {
if (record.name_id == static_cast<uint16_t>(id)) {
if (record.name.index() == 0) {
record.name = name;
} else {
record.name = wname;
}
}
}
}
void
NameTable::NameRecord::write(Sink& table_sink, Sink& string_sink) const
{
table_sink.put(platform_id);
table_sink.put(platform_specific_id);
table_sink.put(language_id);
table_sink.put(name_id);
if (auto* str = boost::variant2::get_if<std::string>(&name)) {
table_sink.put(static_cast<uint16_t>(str->length()));
table_sink.put(static_cast<uint16_t>(string_sink.offset_from_initial()));
string_sink.put(*str);
} else if (auto* wstr = boost::variant2::get_if<std::wstring>(&name)) {
table_sink.put(static_cast<uint16_t>(wstr->length() * 2));
table_sink.put(static_cast<uint16_t>(string_sink.offset_from_initial()));
string_sink.put(*wstr);
}
}
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