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- #include "./writer.hpp"
-
- #include <neo/buffer_algorithm/concat.hpp>
-
- #include <array>
- #include <charconv>
-
- using namespace fansi;
- using namespace neo::literals;
-
- namespace {
-
- int code_for_color(std_color col, bool bright) {
- return 30 + int(col) + ((bright && col != std_color::normal) ? 60 : 0);
- }
-
- }
-
- void text_writer::put_style(const text_style& new_style) noexcept {
- auto& prev_style = _style;
- bool unbold = false;
- std::string reset_then_enable = "0";
- std::string set_toggles;
-
- using neo::dynbuf_concat;
-
- auto append_int = [&](std::string& out, int i) {
- std::array<char, 4> valbuf;
- auto res = std::to_chars(valbuf.data(), valbuf.data() + sizeof(valbuf), i);
- if (!out.empty()) {
- out.push_back(';');
- }
- neo::dynbuf_concat(out, neo::as_buffer(valbuf, res.ptr - valbuf.data()));
- };
-
- auto append_toggle = [&](bool my_state, bool prev_state, int on_val) {
- int off_val = on_val + 20;
- if (!my_state) {
- if (prev_state != my_state) {
- append_int(set_toggles, off_val);
- if (off_val == 21) {
-
-
-
- unbold = true;
- }
- }
- } else {
- append_int(reset_then_enable, on_val);
- if (prev_state != my_state) {
- append_int(set_toggles, on_val);
- }
- }
- };
-
- append_toggle(new_style.bold, prev_style.bold, 1);
- append_toggle(new_style.faint, prev_style.faint, 2);
- append_toggle(new_style.italic, prev_style.italic, 3);
- append_toggle(new_style.underline, prev_style.underline, 4);
- append_toggle(new_style.reverse, prev_style.reverse, 7);
- append_toggle(new_style.strike, prev_style.strike, 9);
-
- int fg_int = code_for_color(new_style.fg_color, new_style.bright);
- int bg_int = code_for_color(new_style.bg_color, new_style.bright) + 10;
- int prev_fg_int = code_for_color(prev_style.fg_color, prev_style.bright);
- int prev_bg_int = code_for_color(prev_style.bg_color, prev_style.bright) + 10;
-
- if (new_style.fg_color == std_color::normal) {
-
- if (fg_int != prev_fg_int) {
- append_int(set_toggles, fg_int);
- }
- } else {
- append_int(reset_then_enable, fg_int);
- if (fg_int != prev_fg_int) {
- append_int(set_toggles, fg_int);
- }
- }
-
- if (new_style.bg_color == std_color::normal) {
-
- if (bg_int != prev_bg_int) {
- append_int(set_toggles, bg_int);
- }
- } else {
- append_int(reset_then_enable, bg_int);
- if (bg_int != prev_bg_int) {
- append_int(set_toggles, bg_int);
- }
- }
-
- if (set_toggles.empty()) {
-
- } else if (unbold || set_toggles.size() > reset_then_enable.size()) {
- dynbuf_concat(_buf, "\x1b[", reset_then_enable, "m");
- } else {
- dynbuf_concat(_buf, "\x1b[", set_toggles, "m");
- }
-
- _style = new_style;
- }
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