norohind/kmscon
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console: add auto-wrap mode

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If auto-wrap mode is enabled we automatically advance the cursor to the
next line if we hit the end of line. Otherwise, we simply continue
overwriting the last character in the line.

Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
This commit is contained in:
David Herrmann 2012-02-04 15:49:14 +01:00
parent 497d3840dc
commit 466fcc3b06
1 changed files with 10 additions and 5 deletions
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15
src/console.c
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@ -60,6 +60,7 @@ struct kmscon_console {
unsigned int margin_top; /* idx of first scroll line */
unsigned int margin_bottom; /* idx of last scroll line */
bool rel_addr; /* is relative addressing used? */
bool auto_wrap; /* auto wrap on end of line? */
/* cursor */
unsigned int cursor_x;
@ -258,11 +259,15 @@ void kmscon_console_write(struct kmscon_console *con, kmscon_symbol_t ch)
return;
if (con->cursor_x >= con->cells_x) {
con->cursor_x = 0;
con->cursor_y++;
if (con->cursor_y > con->margin_bottom) {
con->cursor_y--;
kmscon_buffer_scroll_up(con->cells, 1);
if (con->auto_wrap) {
con->cursor_x = 0;
con->cursor_y++;
if (con->cursor_y > con->margin_bottom) {
con->cursor_y--;
kmscon_buffer_scroll_up(con->cells, 1);
}
} else {
con->cursor_x = con->cells_x - 1;
}
}