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banan-os/userspace/libraries/LibInput/KeyboardLayout.cpp

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#include <BAN/Debug.h>
#include <BAN/HashMap.h>
#include <BAN/String.h>
#include <BAN/StringView.h>
#include <LibInput/KeyboardLayout.h>
#if __is_kernel
#include <kernel/FS/VirtualFileSystem.h>
#else
#include <fcntl.h>
#include <limits.h>
#include <sys/stat.h>
#endif
#include <ctype.h>
namespace LibInput
{
struct StringViewLower
{
BAN::StringView value;
StringViewLower(BAN::StringView sv)
: value(sv)
{ }
bool operator==(const StringViewLower& other) const
{
if (value.size() != other.value.size())
return false;
for (size_t i = 0; i < value.size(); i++)
if (tolower(value[i]) != tolower(other.value[i]))
return false;
return true;
}
};
struct StringViewLowerHash
{
BAN::hash_t operator()(const StringViewLower& value) const
{
constexpr BAN::hash_t FNV_offset_basis = 0x811c9dc5;
constexpr BAN::hash_t FNV_prime = 0x01000193;
BAN::hash_t hash = FNV_offset_basis;
for (size_t i = 0; i < value.value.size(); i++)
{
hash *= FNV_prime;
hash ^= (uint8_t)tolower(value.value[i]);
}
return hash;
}
};
static BAN::UniqPtr<KeyboardLayout> s_instance;
BAN::ErrorOr<void> KeyboardLayout::initialize()
{
ASSERT(!s_instance);
s_instance = TRY(BAN::UniqPtr<KeyboardLayout>::create());
return {};
}
KeyboardLayout& KeyboardLayout::get()
{
ASSERT(s_instance);
return *s_instance;
}
KeyboardLayout::KeyboardLayout()
{
for (auto& key : m_keycode_to_key_normal)
key = Key::None;
for (auto& key : m_keycode_to_key_shift)
key = Key::None;
for (auto& key : m_keycode_to_key_altgr)
key = Key::None;
}
KeyEvent KeyboardLayout::key_event_from_raw(RawKeyEvent event)
{
KeyEvent result;
result.modifier = event.modifier;
if (result.shift())
result.key = m_keycode_to_key_shift[event.keycode];
else if (result.ralt())
result.key = m_keycode_to_key_altgr[event.keycode];
else
result.key = m_keycode_to_key_normal[event.keycode];
return result;
}
static BAN::Optional<uint8_t> parse_keycode(BAN::StringView str)
{
if (str.size() > 3)
return {};
uint16_t keycode = 0;
for (char c : str)
{
if (!isdigit(c))
return {};
keycode = (keycode * 10) + (c - '0');
}
if (keycode >= 0xFF)
return {};
return keycode;
}
static BAN::HashMap<StringViewLower, Key, StringViewLowerHash> s_name_to_key;
static BAN::ErrorOr<void> initialize_name_to_key();
static BAN::Optional<Key> parse_key(BAN::StringView name)
{
if (s_name_to_key.contains(name))
return s_name_to_key[name];
return {};
}
static BAN::ErrorOr<BAN::Vector<BAN::String>> load_keymap_lines_and_parse_includes(BAN::StringView path)
{
BAN::String file_data;
BAN::String canonical_path;
#if __is_kernel
{
auto file = TRY(Kernel::VirtualFileSystem::get().file_from_absolute_path({ 0, 0, 0, 0 }, path, 0));
TRY(file_data.resize(file.inode->size()));
TRY(file.inode->read(0, BAN::ByteSpan { reinterpret_cast<uint8_t*>(file_data.data()), file_data.size() }));
canonical_path = file.canonical_path;
}
#else
{
char null_path[PATH_MAX];
strncpy(null_path, path.data(), path.size());
null_path[path.size()] = '\0';
struct stat st;
if (stat(null_path, &st) == -1)
return BAN::Error::from_errno(errno);
TRY(file_data.resize(st.st_size));
int fd = open(null_path, O_RDONLY);
if (fd == -1)
return BAN::Error::from_errno(errno);
ssize_t nread = read(fd, file_data.data(), st.st_size);
close(fd);
if (nread != st.st_size)
return BAN::Error::from_errno(errno);
MUST(canonical_path.append(path));
}
#endif
BAN::Vector<BAN::String> result;
auto lines = TRY(file_data.sv().split('\n'));
for (auto line : lines)
{
auto parts = TRY(line.split([](char c) -> bool { return isspace(c); }));
if (parts.empty() || parts.front().front() == '#')
continue;
if (parts.front() == "include"_sv)
{
if (parts.size() != 2)
{
dprintln("Invalid modifier instruction in keymap '{}'", line);
dprintln(" format: include \"PATH\"");
return BAN::Error::from_errno(EINVAL);
}
if (parts[1].size() < 2 || parts[1].front() != '"' || parts[1].back() != '"')
{
dprintln("Invalid modifier instruction in keymap '{}'", line);
dprintln(" format: include \"PATH\"");
return BAN::Error::from_errno(EINVAL);
}
parts[1] = parts[1].substring(1, parts[1].size() - 2);
BAN::String include_path;
TRY(include_path.append(canonical_path));
ASSERT(include_path.sv().contains('/'));
while (include_path.back() != '/')
include_path.pop_back();
TRY(include_path.append(parts[1]));
auto new_lines = TRY(load_keymap_lines_and_parse_includes(include_path));
TRY(result.reserve(result.size() + new_lines.size()));
for (auto& line : new_lines)
TRY(result.push_back(BAN::move(line)));
}
else
{
BAN::String line_str;
TRY(line_str.append(line));
TRY(result.push_back(BAN::move(line_str)));
}
}
return result;
}
BAN::ErrorOr<void> KeyboardLayout::load_from_file(BAN::StringView path)
{
if (s_name_to_key.empty())
TRY(initialize_name_to_key());
auto new_layout = TRY(BAN::UniqPtr<KeyboardLayout>::create());
bool shift_is_mod = false;
bool altgr_is_mod = false;
auto lines = TRY(load_keymap_lines_and_parse_includes(path));
for (const auto& line : lines)
{
auto parts = TRY(line.sv().split([](char c) -> bool { return isspace(c); }));
if (parts.empty() || parts.front().front() == '#')
continue;
if (parts.size() == 1)
{
dprintln("Invalid line in keymap '{}'", line);
dprintln(" format: KEYCODE KEY [MODIFIER=KEY]...");
dprintln(" format: mod MODIFIER");
dprintln(" format: include \"PATH\"");
return BAN::Error::from_errno(EINVAL);
}
if (parts.front() == "mod"_sv)
{
if (parts.size() != 2)
{
dprintln("Invalid modifier instruction in keymap '{}'", line);
dprintln(" format: mod MODIFIER");
return BAN::Error::from_errno(EINVAL);
}
if (parts[1] == "shift"_sv)
shift_is_mod = true;
else if (parts[1] == "altgr"_sv)
altgr_is_mod = true;
else
{
dprintln("Unrecognized modifier '{}'", parts[1]);
return BAN::Error::from_errno(EINVAL);
}
continue;
}
auto keycode = parse_keycode(parts.front());
if (!keycode.has_value())
{
dprintln("Invalid keycode '{}', keycode must number between [0, 0xFF[", parts.front());
return BAN::Error::from_errno(EINVAL);
}
auto default_key = parse_key(parts[1]);
if (!default_key.has_value())
{
dprintln("Unrecognized key '{}'", parts[1]);
return BAN::Error::from_errno(EINVAL);
}
new_layout->m_keycode_to_key_normal[*keycode] = *default_key;
new_layout->m_keycode_to_key_shift[*keycode] = *default_key;
new_layout->m_keycode_to_key_altgr[*keycode] = *default_key;
for (size_t i = 2; i < parts.size(); i++)
{
auto pair = TRY(parts[i].split('='));
if (pair.size() != 2)
{
dprintln("Invalid modifier format '{}', modifier format: MODIFIRER=KEY", parts[i]);
return BAN::Error::from_errno(EINVAL);
}
auto key = parse_key(pair.back());
if (!key.has_value())
{
dprintln("Unrecognized key '{}'", pair.back());
return BAN::Error::from_errno(EINVAL);
}
if (shift_is_mod && pair.front() == "shift"_sv)
new_layout->m_keycode_to_key_shift[*keycode] = *key;
else if (altgr_is_mod && pair.front() == "altgr"_sv)
new_layout->m_keycode_to_key_altgr[*keycode] = *key;
else
{
dprintln("Unrecognized modifier '{}'", pair.front());
return BAN::Error::from_errno(EINVAL);
}
}
}
for (size_t i = 0; i < new_layout->m_keycode_to_key_normal.size(); i++)
if (new_layout->m_keycode_to_key_normal[i] != Key::None)
m_keycode_to_key_normal[i] = new_layout->m_keycode_to_key_normal[i];
for (size_t i = 0; i < new_layout->m_keycode_to_key_shift.size(); i++)
if (new_layout->m_keycode_to_key_shift[i] != Key::None)
m_keycode_to_key_shift[i] = new_layout->m_keycode_to_key_shift[i];
for (size_t i = 0; i < new_layout->m_keycode_to_key_altgr.size(); i++)
if (new_layout->m_keycode_to_key_altgr[i] != Key::None)
m_keycode_to_key_altgr[i] = new_layout->m_keycode_to_key_altgr[i];
return {};
}
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wstack-usage="
static BAN::ErrorOr<void> initialize_name_to_key()
{
ASSERT(s_name_to_key.empty());
TRY(s_name_to_key.insert("A_Ring"_sv, Key::A_Ring));
TRY(s_name_to_key.insert("A_Umlaut"_sv, Key::A_Umlaut));
TRY(s_name_to_key.insert("A"_sv, Key::A));
TRY(s_name_to_key.insert("Acute"_sv, Key::Acute));
TRY(s_name_to_key.insert("AltGr"_sv, Key::AltGr));
TRY(s_name_to_key.insert("Ampersand"_sv, Key::Ampersand));
TRY(s_name_to_key.insert("ArrowDown"_sv, Key::ArrowDown));
TRY(s_name_to_key.insert("ArrowLeft"_sv, Key::ArrowLeft));
TRY(s_name_to_key.insert("ArrowRight"_sv, Key::ArrowRight));
TRY(s_name_to_key.insert("ArrowUp"_sv, Key::ArrowUp));
TRY(s_name_to_key.insert("Asterix"_sv, Key::Asterix));
TRY(s_name_to_key.insert("AtSign"_sv, Key::AtSign));
TRY(s_name_to_key.insert("B"_sv, Key::B));
TRY(s_name_to_key.insert("BackSlash"_sv, Key::BackSlash));
TRY(s_name_to_key.insert("Backspace"_sv, Key::Backspace));
TRY(s_name_to_key.insert("BackTick"_sv, Key::BackTick));
TRY(s_name_to_key.insert("BrokenBar"_sv, Key::BrokenBar));
TRY(s_name_to_key.insert("C"_sv, Key::C));
TRY(s_name_to_key.insert("Calculator"_sv, Key::Calculator));
TRY(s_name_to_key.insert("CapsLock"_sv, Key::CapsLock));
TRY(s_name_to_key.insert("Caret"_sv, Key::Caret));
TRY(s_name_to_key.insert("Cedilla"_sv, Key::Cedilla));
TRY(s_name_to_key.insert("CloseCurlyBracket"_sv, Key::CloseCurlyBracket));
TRY(s_name_to_key.insert("CloseParenthesis"_sv, Key::CloseParenthesis));
TRY(s_name_to_key.insert("CloseSquareBracket"_sv, Key::CloseSquareBracket));
TRY(s_name_to_key.insert("Colon"_sv, Key::Colon));
TRY(s_name_to_key.insert("Comma"_sv, Key::Comma));
TRY(s_name_to_key.insert("Currency"_sv, Key::Currency));
TRY(s_name_to_key.insert("D"_sv, Key::D));
TRY(s_name_to_key.insert("Delete"_sv, Key::Delete));
TRY(s_name_to_key.insert("Dollar"_sv, Key::Dollar));
TRY(s_name_to_key.insert("DoubleQuote"_sv, Key::DoubleQuote));
TRY(s_name_to_key.insert("E"_sv, Key::E));
TRY(s_name_to_key.insert("End"_sv, Key::End));
TRY(s_name_to_key.insert("Enter"_sv, Key::Enter));
TRY(s_name_to_key.insert("Equals"_sv, Key::Equals));
TRY(s_name_to_key.insert("Escape"_sv, Key::Escape));
TRY(s_name_to_key.insert("Euro"_sv, Key::Euro));
TRY(s_name_to_key.insert("Exclamation"_sv, Key::ExclamationMark));
TRY(s_name_to_key.insert("ExclamationMark"_sv, Key::ExclamationMark));
TRY(s_name_to_key.insert("F"_sv, Key::F));
TRY(s_name_to_key.insert("F1"_sv, Key::F1));
TRY(s_name_to_key.insert("F10"_sv, Key::F10));
TRY(s_name_to_key.insert("F11"_sv, Key::F11));
TRY(s_name_to_key.insert("F12"_sv, Key::F12));
TRY(s_name_to_key.insert("F2"_sv, Key::F2));
TRY(s_name_to_key.insert("F3"_sv, Key::F3));
TRY(s_name_to_key.insert("F4"_sv, Key::F4));
TRY(s_name_to_key.insert("F5"_sv, Key::F5));
TRY(s_name_to_key.insert("F6"_sv, Key::F6));
TRY(s_name_to_key.insert("F7"_sv, Key::F7));
TRY(s_name_to_key.insert("F8"_sv, Key::F8));
TRY(s_name_to_key.insert("F9"_sv, Key::F9));
TRY(s_name_to_key.insert("G"_sv, Key::G));
TRY(s_name_to_key.insert("GreaterThan"_sv, Key::GreaterThan));
TRY(s_name_to_key.insert("H"_sv, Key::H));
TRY(s_name_to_key.insert("Half"_sv, Key::Half));
TRY(s_name_to_key.insert("Hashtag"_sv, Key::Hashtag));
TRY(s_name_to_key.insert("Home"_sv, Key::Home));
TRY(s_name_to_key.insert("Hyphen"_sv, Key::Hyphen));
TRY(s_name_to_key.insert("I"_sv, Key::I));
TRY(s_name_to_key.insert("Insert"_sv, Key::Insert));
TRY(s_name_to_key.insert("J"_sv, Key::J));
TRY(s_name_to_key.insert("K"_sv, Key::K));
TRY(s_name_to_key.insert("Key0"_sv, Key::_0));
TRY(s_name_to_key.insert("Key1"_sv, Key::_1));
TRY(s_name_to_key.insert("Key2"_sv, Key::_2));
TRY(s_name_to_key.insert("Key3"_sv, Key::_3));
TRY(s_name_to_key.insert("Key4"_sv, Key::_4));
TRY(s_name_to_key.insert("Key5"_sv, Key::_5));
TRY(s_name_to_key.insert("Key6"_sv, Key::_6));
TRY(s_name_to_key.insert("Key7"_sv, Key::_7));
TRY(s_name_to_key.insert("Key8"_sv, Key::_8));
TRY(s_name_to_key.insert("Key9"_sv, Key::_9));
TRY(s_name_to_key.insert("L"_sv, Key::L));
TRY(s_name_to_key.insert("LAlt"_sv, Key::LeftAlt));
TRY(s_name_to_key.insert("LControl"_sv, Key::LeftCtrl));
TRY(s_name_to_key.insert("LeftAlt"_sv, Key::LeftAlt));
TRY(s_name_to_key.insert("LeftControl"_sv, Key::LeftCtrl));
TRY(s_name_to_key.insert("LeftShift"_sv, Key::LeftShift));
TRY(s_name_to_key.insert("LessThan"_sv, Key::LessThan));
TRY(s_name_to_key.insert("LShift"_sv, Key::LeftShift));
TRY(s_name_to_key.insert("M"_sv, Key::M));
TRY(s_name_to_key.insert("MediaNext"_sv, Key::MediaNext));
TRY(s_name_to_key.insert("MediaPlayPause"_sv, Key::MediaPlayPause));
TRY(s_name_to_key.insert("MediaPrevious"_sv, Key::MediaPrevious));
TRY(s_name_to_key.insert("MediaStop"_sv, Key::MediaStop));
TRY(s_name_to_key.insert("N"_sv, Key::N));
TRY(s_name_to_key.insert("Negation"_sv, Key::Negation));
TRY(s_name_to_key.insert("None"_sv, Key::None));
TRY(s_name_to_key.insert("NumLock"_sv, Key::NumLock));
TRY(s_name_to_key.insert("Numpad0"_sv, Key::Numpad0));
TRY(s_name_to_key.insert("Numpad1"_sv, Key::Numpad1));
TRY(s_name_to_key.insert("Numpad2"_sv, Key::Numpad2));
TRY(s_name_to_key.insert("Numpad3"_sv, Key::Numpad3));
TRY(s_name_to_key.insert("Numpad4"_sv, Key::Numpad4));
TRY(s_name_to_key.insert("Numpad5"_sv, Key::Numpad5));
TRY(s_name_to_key.insert("Numpad6"_sv, Key::Numpad6));
TRY(s_name_to_key.insert("Numpad7"_sv, Key::Numpad7));
TRY(s_name_to_key.insert("Numpad8"_sv, Key::Numpad8));
TRY(s_name_to_key.insert("Numpad9"_sv, Key::Numpad9));
TRY(s_name_to_key.insert("NumpadDecimal"_sv, Key::NumpadDecimal));
TRY(s_name_to_key.insert("NumpadDivide"_sv, Key::NumpadDivide));
TRY(s_name_to_key.insert("NumpadEnter"_sv, Key::NumpadEnter));
TRY(s_name_to_key.insert("NumpadMinus"_sv, Key::NumpadMinus));
TRY(s_name_to_key.insert("NumpadMultiply"_sv, Key::NumpadMultiply));
TRY(s_name_to_key.insert("NumpadPlus"_sv, Key::NumpadPlus));
TRY(s_name_to_key.insert("O_Umlaut"_sv, Key::O_Umlaut));
TRY(s_name_to_key.insert("O"_sv, Key::O));
TRY(s_name_to_key.insert("OpenCurlyBracket"_sv, Key::OpenCurlyBracket));
TRY(s_name_to_key.insert("OpenParenthesis"_sv, Key::OpenParenthesis));
TRY(s_name_to_key.insert("OpenSquareBracket"_sv, Key::OpenSquareBracket));
TRY(s_name_to_key.insert("P"_sv, Key::P));
TRY(s_name_to_key.insert("PageDown"_sv, Key::PageDown));
TRY(s_name_to_key.insert("PageUp"_sv, Key::PageUp));
TRY(s_name_to_key.insert("Percent"_sv, Key::Percent));
TRY(s_name_to_key.insert("Period"_sv, Key::Period));
TRY(s_name_to_key.insert("Pipe"_sv, Key::Pipe));
TRY(s_name_to_key.insert("Plus"_sv, Key::Plus));
TRY(s_name_to_key.insert("Pound"_sv, Key::Pound));
TRY(s_name_to_key.insert("PrintScreen"_sv, Key::PrintScreen));
TRY(s_name_to_key.insert("Q"_sv, Key::Q));
TRY(s_name_to_key.insert("Question"_sv, Key::QuestionMark));
TRY(s_name_to_key.insert("QuestionMark"_sv, Key::QuestionMark));
TRY(s_name_to_key.insert("R"_sv, Key::R));
TRY(s_name_to_key.insert("RAlt"_sv, Key::RightAlt));
TRY(s_name_to_key.insert("RControl"_sv, Key::RightCtrl));
TRY(s_name_to_key.insert("RightAlt"_sv, Key::RightAlt));
TRY(s_name_to_key.insert("RightControl"_sv, Key::RightCtrl));
TRY(s_name_to_key.insert("RightShift"_sv, Key::RightShift));
TRY(s_name_to_key.insert("RShift"_sv, Key::RightShift));
TRY(s_name_to_key.insert("S"_sv, Key::S));
TRY(s_name_to_key.insert("ScrollLock"_sv, Key::ScrollLock));
TRY(s_name_to_key.insert("Section"_sv, Key::Section));
TRY(s_name_to_key.insert("Semicolon"_sv, Key::Semicolon));
TRY(s_name_to_key.insert("SingleQuote"_sv, Key::SingleQuote));
TRY(s_name_to_key.insert("Slash"_sv, Key::Slash));
TRY(s_name_to_key.insert("Space"_sv, Key::Space));
TRY(s_name_to_key.insert("Super"_sv, Key::Super));
TRY(s_name_to_key.insert("T"_sv, Key::T));
TRY(s_name_to_key.insert("Tab"_sv, Key::Tab));
TRY(s_name_to_key.insert("Tilde"_sv, Key::Tilde));
TRY(s_name_to_key.insert("TwoDots"_sv, Key::TwoDots));
TRY(s_name_to_key.insert("U"_sv, Key::U));
TRY(s_name_to_key.insert("Underscore"_sv, Key::Underscore));
TRY(s_name_to_key.insert("V"_sv, Key::V));
TRY(s_name_to_key.insert("VolumeDown"_sv, Key::VolumeDown));
TRY(s_name_to_key.insert("VolumeMute"_sv, Key::VolumeMute));
TRY(s_name_to_key.insert("VolumeUp"_sv, Key::VolumeUp));
TRY(s_name_to_key.insert("W"_sv, Key::W));
TRY(s_name_to_key.insert("X"_sv, Key::X));
TRY(s_name_to_key.insert("Y"_sv, Key::Y));
TRY(s_name_to_key.insert("Z"_sv, Key::Z));
return {};
}
#pragma GCC diagnostic pop
}
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