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-rw-r--r--ttwhy/scanners/ansi.cppm261
1 files changed, 0 insertions, 261 deletions
diff --git a/ttwhy/scanners/ansi.cppm b/ttwhy/scanners/ansi.cppm
deleted file mode 100644
index 886e699..0000000
--- a/ttwhy/scanners/ansi.cppm
+++ /dev/null
@@ -1,261 +0,0 @@
-module;
-
-#include <algorithm>
-#include <boost/sml.hpp>
-
-#include <span>
-#include <string>
-
-export module ttwhy.scanners:ansi;
-
-import :events;
-
-namespace ttwhy::scanners::detail
-{
-
- /// Events
-
- struct byte_received
- {
- char value;
- };
-
- struct timeout_expired
- {
- };
-
- /// States
-
- constexpr auto idle = boost::sml::state<class idle>;
- constexpr auto escape_sequence = boost::sml::state<class escape_sequence>;
- constexpr auto csi_sequence = boost::sml::state<class csi_sequence>;
- constexpr auto ss3_sequence = boost::sml::state<class ss3_sequence>;
-
- /// Guards
-
- constexpr auto is_backspace = [](byte_received e) {
- return e.value == '\x08' || e.value == '\x7f';
- };
-
- constexpr auto is_tab = [](byte_received e) {
- return e.value == '\x09';
- };
-
- constexpr auto is_enter = [](byte_received e) {
- return e.value == '\x0a' || e.value == '\x0d';
- };
-
- constexpr auto is_escape = [](byte_received e) {
- return e.value == '\x1b';
- };
-
- constexpr auto is_printable = [](byte_received e) {
- return e.value >= 0x20 && e.value <= 0x7e;
- };
-
- constexpr auto is_csi_introducer = [](byte_received e) {
- return e.value == '[';
- };
-
- constexpr auto is_ss3_introducer = [](byte_received e) {
- return e.value == 'O';
- };
-
- constexpr auto is_invalid_introducer = [](byte_received e) {
- return !(is_ss3_introducer(e) || is_csi_introducer(e));
- };
-
- constexpr auto is_csi_param = [](byte_received e) {
- return e.value >= 0x20 && e.value <= 0x3f;
- };
-
- constexpr auto is_csi_terminator = [](byte_received e) {
- return e.value >= 0x40 && e.value <= 0x7e;
- };
-
- /// Transitions
-
- template<typename SinkType>
- struct transition_table
- {
- auto operator()() const noexcept
- {
- using namespace boost::sml;
-
- constexpr auto push_character = [](byte_received const & event, SinkType & sink) {
- sink(character_event{event.value});
- };
-
- constexpr auto push_backspace = [](SinkType & sink) {
- sink(control_event{control_key::backspace});
- };
-
- constexpr auto push_tab = [](SinkType & sink) {
- sink(control_event(control_key::tab));
- };
-
- constexpr auto push_enter = [](SinkType & sink) {
- sink(control_event(control_key::enter));
- };
-
- constexpr auto emit_timeout_escape = [](SinkType & sink, std::string & buffer) {
- sink(control_event{control_key::escape});
- buffer.clear();
- };
-
- constexpr auto fallback_escape = [](byte_received const & event, SinkType & sink) {
- sink(control_event{control_key::escape});
- if (event.value >= 0x20 && event.value <= 0x7e)
- {
- sink(character_event{event.value});
- }
- };
-
- constexpr auto clear_csi = [](std::string & buffer) {
- buffer.clear();
- };
-
- constexpr auto push_csi_parameter = [](byte_received const & event, std::string & buffer) {
- buffer.push_back(event.value);
- };
-
- constexpr auto resolve_csi = [](byte_received const & event, std::string & buffer, SinkType & sink) {
- if (event.value == '~')
- {
- switch (buffer.at(0))
- {
- case '1':
- case '7':
- sink(navigation_event{navigation_key::home});
- break;
- case '2':
- sink(navigation_event{navigation_key::insert_key});
- break;
- case '3':
- sink(navigation_event{navigation_key::delete_key});
- break;
- case '4':
- case '8':
- sink(navigation_event{navigation_key::end});
- break;
- case '5':
- sink(navigation_event{navigation_key::page_up});
- break;
- case '6':
- sink(navigation_event{navigation_key::page_down});
- break;
- default:
- }
- }
- else
- {
- switch (event.value)
- {
- case 'A':
- sink(navigation_event{navigation_key::up});
- break;
- case 'B':
- sink(navigation_event{navigation_key::down});
- break;
- case 'C':
- sink(navigation_event{navigation_key::right});
- break;
- case 'D':
- sink(navigation_event{navigation_key::left});
- break;
- case 'H':
- sink(navigation_event{navigation_key::home});
- break;
- case 'F':
- sink(navigation_event{navigation_key::end});
- break;
- default:
- }
- }
- buffer.clear();
- };
-
- constexpr auto resolve_ss3 = [](byte_received const & event, SinkType & sink) {
- switch (event.value)
- {
- case 'A':
- sink(navigation_event{navigation_key::up});
- break;
- case 'B':
- sink(navigation_event{navigation_key::down});
- break;
- case 'C':
- sink(navigation_event{navigation_key::right});
- break;
- case 'D':
- sink(navigation_event{navigation_key::left});
- break;
- case 'H':
- sink(navigation_event{navigation_key::home});
- break;
- case 'F':
- sink(navigation_event{navigation_key::end});
- break;
- default:
- }
- };
-
- // clang-format off
- return make_transition_table(
- *idle + event<byte_received>[is_escape] = escape_sequence,
- idle + event<byte_received>[is_backspace] / push_backspace = idle,
- idle + event<byte_received>[is_tab] / push_tab = idle,
- idle + event<byte_received>[is_enter] / push_enter = idle,
- idle + event<byte_received>[is_printable] / push_character = idle,
-
- escape_sequence + event<byte_received>[is_csi_introducer] / clear_csi = csi_sequence,
- escape_sequence + event<byte_received>[is_ss3_introducer] = ss3_sequence,
- escape_sequence + event<byte_received>[is_invalid_introducer] / fallback_escape = idle,
- escape_sequence + event<timeout_expired> / emit_timeout_escape = idle,
-
- csi_sequence + event<byte_received>[is_csi_param] / push_csi_parameter = csi_sequence,
- csi_sequence + event<byte_received>[is_csi_terminator] / resolve_csi = idle,
- csi_sequence + event<timeout_expired> / emit_timeout_escape = idle,
-
- ss3_sequence + event<byte_received> / resolve_ss3 = idle,
- ss3_sequence + event<timeout_expired> / emit_timeout_escape = idle
- );
- // clang-format on
- }
- };
-
-} // namespace ttwhy::scanners::detail
-
-export namespace ttwhy::scanners
-{
-
- template<typename SinkType>
- struct ansi
- {
- explicit ansi(SinkType & sink)
- : m_state_machine{sink, m_csi_buffer}
- {}
-
- auto process(std::span<char const> buffer) -> void
- {
- std::ranges::for_each(buffer, [&](auto byte) { m_state_machine.process_event(detail::byte_received{byte}); });
- }
-
- auto timeout()
- {
- m_state_machine.process_event(detail::timeout_expired{});
- }
-
- [[nodiscard]] auto is_pending() const -> bool
- {
- return m_state_machine.is(detail::escape_sequence) || //
- m_state_machine.is(detail::csi_sequence) || //
- m_state_machine.is(detail::ss3_sequence);
- }
-
- private:
- std::string m_csi_buffer{};
- boost::sml::sm<detail::transition_table<SinkType>> m_state_machine;
- };
-
-} // namespace ttwhy::scanners
generated by cgit v1.2.3 (git 2.25.1) at 2026-06-26 22:21:56 +0000