Function refreshSingleLine

tools/shell/linenoise.cpp:2067–2108

Single line low level line refresh. * * Rewrite the currently edited line accordingly to the buffer content, * cursor position, and number of columns of the terminal. */

 * Rewrite the currently edited line accordingly to the buffer content,
 * cursor position, and number of columns of the terminal. */
static void refreshSingleLine(struct linenoiseState* l) {
    if (!l->render) {
        return;
    }

    char seq[64];
    uint32_t plen = linenoiseComputeRenderWidth(l->prompt, strlen(l->prompt));
    int fd = l->ofd;
    char buf[LINENOISE_MAX_LINE];
    size_t len = l->len;
    size_t pos = l->pos;
    size_t chars = l->totalUTF8Chars;
    AppendBuffer append_buffer;
    size_t renderPos = 0;

    truncateText(l->buf, len, pos, l->cols, plen, highlightEnabled, renderPos, buf);

    /* Cursor to left edge */
    snprintf(seq, 64, "\r");
    append_buffer.abAppend(seq);

    append_buffer.abAppend("\033[0m"); // reset all attributes

    /* Write the prompt and the current buffer content */
    append_buffer.abAppend(l->prompt);
    if (maskmode == 1) {
        while (chars--)
            append_buffer.abAppend("*");
    } else {
        append_buffer.abAppend(buf, len);
    }
    /* Show hits if any. */
    refreshShowHints(append_buffer, l, plen);
    /* Erase to right */
    snprintf(seq, 64, "\x1b[0K");
    append_buffer.abAppend(seq);
    /* Move cursor to original position. */
    snprintf(seq, 64, "\r\x1b[%dC", (int)(renderPos + plen));
    append_buffer.abAppend(seq);

    append_buffer.abWrite(fd);
}

bool isNewline(char c) {
    return c == '\n' || c == '\r';