Method prompt_refresh

library/Console-posix.cpp:478–516

                rawmode = 0;
        }
        void prompt_refresh()
        {
            char seq[64];
            int cols = get_columns();
            int plen = prompt.size() % cols;
            int len = raw_buffer.size();
            int begin = 0;
            int cooked_cursor = raw_cursor;
            if ((plen+cooked_cursor) >= cols)
            {
                const int text_over = plen + cooked_cursor + 1 - cols;
                begin = text_over;
                len -= text_over;
                cooked_cursor -= text_over;
            }
            if (plen+len > cols)
                len -= plen+len - cols;
            std::string mbstr;
            try {
                mbstr = toLocaleMB(raw_buffer.substr(begin,len));
            }
            catch (std::out_of_range&) {
                // fallback check in case begin is still out of range
                // (this behaves badly but at least doesn't crash)
                mbstr = toLocaleMB(raw_buffer);
            }
            /* Cursor to left edge */
            snprintf(seq,64,"\x1b[1G");
            if (::write(STDIN_FILENO,seq,strlen(seq)) == -1) return;
            /* Write the prompt and the current buffer content */
            if (::write(STDIN_FILENO,prompt.c_str(),plen) == -1) return;
            if (::write(STDIN_FILENO,mbstr.c_str(),mbstr.length()) == -1) return;
            /* Erase to right */
            snprintf(seq,64,"\x1b[0K");
            if (::write(STDIN_FILENO,seq,strlen(seq)) == -1) return;
            /* Move cursor to original position. */
            snprintf(seq,64,"\x1b[1G\x1b[%dC", (int)(cooked_cursor+plen));
            if (::write(STDIN_FILENO,seq,strlen(seq)) == -1) return;
        }

        int prompt_loop(std::recursive_mutex * lock, CommandHistory & history)
        {