Instead of just checking for an empty buffer, which may not be the case if

there is unconsumed data, save the previous size and use it instead. This means
that activity monitoring should work in this (unlikely) event.

Also remove a debugging statement that no longer seems necessary.

2 files changed, 6 insertions, 5 deletions

diff --git a/input.c b/input.c
index 4cfd3522..7b43f261 100644
--- a/input.c
+++ b/input.c
@@ -235,6 +235,8 @@ input_init(struct window_pane *wp)
 	ictx->saved_cy = 0;
 
 	input_state(ictx, input_state_first);
+
+	ictx->was = 0;
 }
 
 void
@@ -252,8 +254,9 @@ input_parse(struct window_pane *wp)
 	struct input_ctx	*ictx = &wp->ictx;
 	u_char			 ch;
 
-	if (BUFFER_USED(wp->in) == 0)
+	if (BUFFER_USED(wp->in) == ictx->was)
 		return;
+	wp->window->flags |= WINDOW_ACTIVITY;
 
 	ictx->buf = BUFFER_OUT(wp->in);
 	ictx->len = BUFFER_USED(wp->in);
@@ -261,15 +264,11 @@ input_parse(struct window_pane *wp)
 
 	ictx->wp = wp;
 
-	log_debug2("entry; buffer=%zu", ictx->len);
-
 	if (wp->mode == NULL)
 		screen_write_start(&ictx->ctx, wp, &wp->base);
 	else
 		screen_write_start(&ictx->ctx, NULL, &wp->base);
 
-	if (ictx->off != ictx->len)
-		wp->window->flags |= WINDOW_ACTIVITY;
 	while (ictx->off < ictx->len) {
 		ch = ictx->buf[ictx->off++];
 		ictx->state(ch, ictx);
@@ -278,6 +277,7 @@ input_parse(struct window_pane *wp)
 	screen_write_stop(&ictx->ctx);
 
 	buffer_remove(wp->in, ictx->len);
+	ictx->was = BUFFER_USED(wp->in);
 }
 
 void
diff --git a/tmux.h b/tmux.h
index 4aa844b8..f70d1f5c 100644
--- a/tmux.h
+++ b/tmux.h
@@ -617,6 +617,7 @@ struct input_ctx {
 	u_char		*buf;
 	size_t		 len;
 	size_t		 off;
+	size_t		 was;
 
 	struct grid_cell cell;