console: add auto-wrap mode

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>

1 files changed, 10 insertions, 5 deletions

diff --git a/src/console.c b/src/console.c
index 943d00b..d419f06 100644
--- a/src/console.c
+++ b/src/console.c
@@ -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;
 		}
 	}