nausea

commit 8f410bc65b665a32fce59d8041f7f85f7e4b0e00
parent 0d06bf56e3f6431a42b4c6889edbdee3bc532781
Author: lostd <lostd@2f30.org>
Date:   Mon, 15 Sep 2014 23:01:03 +0100

Flag for the fountain visualization to move leftwards

Diffstat:
M
nausea.1
 | 
4
++++
M
nausea.c
 | 
16
++++++++++++++--

2 files changed, 18 insertions(+), 2 deletions(-)
diff --git a/nausea.1 b/nausea.1
@@ -32,6 +32,8 @@ Enable color.
 Enable falling peaks in the spectrum visualization.
 .It Fl k
 Keep state in the fountain visualization.
+.It Fl l
+Go left in the fountain visualization.
 .El
 .Pp
 Exposed runtime options:
@@ -48,4 +50,6 @@ Toggle color.
 Toggle falling peaks.
 .It k
 Toggle keep state.
+.It l
+Toggle direction.
 .El
diff --git a/nausea.c b/nausea.c
@@ -23,6 +23,7 @@ static char *argv0;
 static int colors;
 static int peaks;
 static int keep;
+static int left;
 static int die;
 
 struct frame {
@@ -371,7 +372,7 @@ draw_fountain(struct frame *fr)
 	erase();
 	attron(A_BOLD);
 
-	/* current column wraps around */
+	/* ensure we are inside the frame */
 	col %= fr->width;
 
 	for (i = 0; i < fr->width; i++) {
@@ -397,7 +398,12 @@ draw_fountain(struct frame *fr)
 			setcolor(0, j);
 		}
 	}
-	col++;
+
+	/* current column wraps around */
+	if (left)
+		col = (col == 0) ? fr->width - 1 : col - 1;
+	else
+		col = (col == fr->width - 1) ? 0 : col + 1;
 
 	attroff(A_BOLD);
 	refresh();
@@ -460,6 +466,9 @@ main(int argc, char *argv[])
 			case 'k':
 				keep = 1;
 				break;
+			case 'l':
+				left = 1;
+				break;
 			case 'h':
 				/* fall-through */
 			default:
@@ -507,6 +516,9 @@ main(int argc, char *argv[])
 		case 'k':
 			keep = !keep;
 			break;
+		case 'l':
+			left = !left;
+			break;
 		case '1':
 			draw = draw_spectrum;
 			break;