Function set_line_contents

common/console.cpp:497–527

    }

    static void set_line_contents(std::string new_line, std::string & line, std::vector<int> & widths, size_t & char_pos,
                                  size_t & byte_pos, int cursor_byte_pos = -1) {
        move_to_line_start(char_pos, byte_pos, widths);
        clear_current_line(widths);

        line = std::move(new_line);
        widths.clear();
        byte_pos = 0;
        char_pos = 0;

        size_t idx = 0;
        int back_width = 0;
        while (idx < line.size()) {
            size_t advance = 0;
            char32_t cp = decode_utf8(line, idx, advance);
            int expected_width = estimateWidth(cp);
            int real_width = put_codepoint(line.c_str() + idx, advance, expected_width);
            if (real_width < 0) real_width = 0;
            widths.push_back(real_width);
            idx += advance;
            if (cursor_byte_pos >= 0 && static_cast<size_t>(cursor_byte_pos) < idx) {
                back_width += real_width;
            } else {
                ++char_pos;
                byte_pos = idx;
            }
        }
        if (cursor_byte_pos >= 0) {
            move_cursor(-back_width);
        }
    }

    static void move_to_line_start(size_t & char_pos, size_t & byte_pos, const std::vector<int> & widths) {
        int back_width = 0;