void console_up() {
int i, j, o;
if (cur_row == 1) {
/* need to scroll up! */
console_scroll_up();
if (cur_row == 1) /* still no change */
return;
}
/* move backwards: */
o = cursor_off;
for (j = cur_col; j >= 0; j--) {
if (screen_copy[cur_row][j])
o--;
}
for (j = 79; j >= 0; j--) {
if (screen_copy[cur_row-1][j]) {
if (j <= seek_col) {
break;
}
o--;
}
}
cursor_off = o;
console_update();
}
/* Multi line low level line refresh.
*
* Rewrite the currently edited line accordingly to the buffer content,
* cursor position, and number of columns of the terminal. */
static void refreshMultiLine(struct linenoiseState *l) {
int plen = wcslen(l->prompt);
int rows = (plen+l->len+l->cols-1)/l->cols; /* rows used by current buf. */
int rpos = (plen+l->oldpos+l->cols)/l->cols; /* cursor relative row. */
int rpos2; /* rpos after refresh. */
int old_rows = l->maxrows;
int j;
/* Update maxrows if needed. */
if (rows > (int)l->maxrows) l->maxrows = rows;
/* First step: clear all the lines used before. To do so start by
* going to the last row. */
if (old_rows-rpos > 0) {
console_move_down(old_rows - rpos);
}
/* Now for every row clear it, go up. */
for (j = 0; j < old_rows-1; j++) {
console_move_to_column(0);
console_erase_to_end_of_line();
console_move_up(1);
}
/* Clean the top line. */
console_move_to_column(0);
console_erase_to_end_of_line();
/* Write the prompt and the current buffer content */
console_write_wchar_string(l->prompt, plen);
console_write_wchar_string(l->buf, l->len);
/* If we are at the very end of the screen with our prompt, we need to
* emit a newline and move the prompt to the first column. */
if (l->pos &&
l->pos == l->len &&
(l->pos+plen) % l->cols == 0)
{
console_scroll_up(1);
console_move_to_column(0);
rows++;
if (rows > (int)l->maxrows)
l->maxrows = rows;
}
/* Move cursor to right position. */
rpos2 = (plen+l->pos+l->cols)/l->cols; /* current cursor relative row. */
/* Go up till we reach the expected positon. */
if (rows-rpos2 > 0) {
console_move_up(rows - rpos2);
}
/* Set column. */
console_move_to_column(((plen+(int)l->pos) % (int)l->cols));
// console_move_down(1);
l->oldpos = l->pos;
}
void console_move_down(int n)
{
SDL_assert (n > 0);
row += n;
while (row >= CONSOLE_ROWS) {
console_scroll_up(1);
row --;
}
}
void console_newline(void)
{
current_col = 0;
if (++current_row == num_rows)
{
current_row--;
console_scroll_up();
}
}
void
console_write_wchar_string (const wchar_t *str, size_t len)
{
for (size_t i = 0; i < len; i ++) {
if (col == CONSOLE_COLS - 1) {
row ++;
col = 0;
if (row == CONSOLE_ROWS) {
console_scroll_up (1);
row --;
}
}
console_write_char (str[i], 0, 0, 0, 0, CONSOLE_COLS - 1);
}
}
void console_left() {
if (cursor_off == 0)
return;
cursor_off--;
/* need scroll? */
if (cursor_off < file_start) {
console_scroll_up();
} else {
/* just update: */
console_update();
}
seek_col = cur_col;
}
void
console_write_latin1_string (const char * str)
{
size_t i = 0;
while (str[i] != '\0')
{
if (col == CONSOLE_COLS - 1)
{
row ++;
col = 0;
if (row == CONSOLE_ROWS)
{
console_scroll_up (1);
row --;
}
}
console_write_char ((uint8_t)(str[i]), 0, 0, 0, 0, CONSOLE_COLS - 1);
i = i + 1;
}
}
void
console_write_ucs4_string (const uint32_t *str)
{
size_t i = 0;
while (str[i] != 0)
{
if (col == CONSOLE_COLS - 1)
{
row ++;
col = 0;
if (row == CONSOLE_ROWS)
{
console_scroll_up (1);
row --;
}
}
console_write_char (str[i], 0, 0, 0, 0, CONSOLE_COLS - 1);
i = i + 1;
}
}
