diff --git a/input.c b/input.c
index 73bd099b..0503c52a 100644
--- a/input.c
+++ b/input.c
@@ -801,16 +801,17 @@ void
 input_reset(struct window_pane *wp, int clear)
 {
 	struct input_ctx	*ictx = wp->ictx;
+	struct screen_write_ctx	*sctx = &ictx->ctx;
 
 	input_reset_cell(ictx);
 
 	if (clear) {
 		if (TAILQ_EMPTY(&wp->modes))
-			screen_write_start(&ictx->ctx, wp, &wp->base);
+			screen_write_start(sctx, wp, &wp->base);
 		else
-			screen_write_start(&ictx->ctx, NULL, &wp->base);
-		screen_write_reset(&ictx->ctx);
-		screen_write_stop(&ictx->ctx);
+			screen_write_start(sctx, NULL, &wp->base);
+		screen_write_reset(sctx);
+		screen_write_stop(sctx);
 	}
 
 	input_clear(ictx);
@@ -846,6 +847,7 @@ void
 input_parse(struct window_pane *wp)
 {
 	struct input_ctx		*ictx = wp->ictx;
+	struct screen_write_ctx		*sctx = &ictx->ctx;
 	const struct input_transition	*itr;
 	struct evbuffer			*evb = wp->event->input;
 	u_char				*buf;
@@ -862,9 +864,9 @@ input_parse(struct window_pane *wp)
 	 * update the tty.
 	 */
 	if (TAILQ_EMPTY(&wp->modes))
-		screen_write_start(&ictx->ctx, wp, &wp->base);
+		screen_write_start(sctx, wp, &wp->base);
 	else
-		screen_write_start(&ictx->ctx, NULL, &wp->base);
+		screen_write_start(sctx, NULL, &wp->base);
 	ictx->wp = wp;
 
 	buf = EVBUFFER_DATA(evb);
@@ -900,7 +902,7 @@ input_parse(struct window_pane *wp)
 		 * be the minority.
 		 */
 		if (itr->handler != input_print)
-			screen_write_collect_end(&ictx->ctx);
+			screen_write_collect_end(sctx);
 
 		/*
 		 * Execute the handler, if any. Don't switch state if it
@@ -919,7 +921,7 @@ input_parse(struct window_pane *wp)
 	}
 
 	/* Close the screen. */
-	screen_write_stop(&ictx->ctx);
+	screen_write_stop(sctx);
 
 	evbuffer_drain(evb, len);
 }
@@ -1048,7 +1050,8 @@ input_ground(struct input_ctx *ictx)
 static int
 input_print(struct input_ctx *ictx)
 {
-	int	set;
+	struct screen_write_ctx	*sctx = &ictx->ctx;
+	int			 set;
 
 	ictx->utf8started = 0; /* can't be valid UTF-8 */
 
@@ -1059,7 +1062,7 @@ input_print(struct input_ctx *ictx)
 		ictx->cell.cell.attr &= ~GRID_ATTR_CHARSET;
 
 	utf8_set(&ictx->cell.cell.data, ictx->ch);
-	screen_write_collect_add(&ictx->ctx, &ictx->cell.cell);
+	screen_write_collect_add(sctx, &ictx->cell.cell);
 	ictx->last = ictx->ch;
 
 	ictx->cell.cell.attr &= ~GRID_ATTR_CHARSET;
@@ -1533,17 +1536,18 @@ input_csi_dispatch(struct input_ctx *ictx)
 static void
 input_csi_dispatch_rm(struct input_ctx *ictx)
 {
-	u_int	i;
+	struct screen_write_ctx	*sctx = &ictx->ctx;
+	u_int			 i;
 
 	for (i = 0; i < ictx->param_list_len; i++) {
 		switch (input_get(ictx, i, 0, -1)) {
 		case -1:
 			break;
 		case 4:		/* IRM */
-			screen_write_mode_clear(&ictx->ctx, MODE_INSERT);
+			screen_write_mode_clear(sctx, MODE_INSERT);
 			break;
 		case 34:
-			screen_write_mode_set(&ictx->ctx, MODE_BLINKING);
+			screen_write_mode_set(sctx, MODE_BLINKING);
 			break;
 		default:
 			log_debug("%s: unknown '%c'", __func__, ictx->ch);
@@ -1556,6 +1560,7 @@ input_csi_dispatch_rm(struct input_ctx *ictx)
 static void
 input_csi_dispatch_rm_private(struct input_ctx *ictx)
 {
+	struct screen_write_ctx	*sctx = &ictx->ctx;
 	struct window_pane	*wp = ictx->wp;
 	u_int			 i;
 
@@ -1564,40 +1569,39 @@ input_csi_dispatch_rm_private(struct input_ctx *ictx)
 		case -1:
 			break;
 		case 1:		/* DECCKM */
-			screen_write_mode_clear(&ictx->ctx, MODE_KCURSOR);
+			screen_write_mode_clear(sctx, MODE_KCURSOR);
 			break;
 		case 3:		/* DECCOLM */
-			screen_write_cursormove(&ictx->ctx, 0, 0);
-			screen_write_clearscreen(&ictx->ctx,
-			    ictx->cell.cell.bg);
+			screen_write_cursormove(sctx, 0, 0);
+			screen_write_clearscreen(sctx, ictx->cell.cell.bg);
 			break;
 		case 6:		/* DECOM */
-			screen_write_mode_clear(&ictx->ctx, MODE_ORIGIN);
-			screen_write_cursormove(&ictx->ctx, 0, 0);
+			screen_write_mode_clear(sctx, MODE_ORIGIN);
+			screen_write_cursormove(sctx, 0, 0);
 			break;
 		case 7:		/* DECAWM */
-			screen_write_mode_clear(&ictx->ctx, MODE_WRAP);
+			screen_write_mode_clear(sctx, MODE_WRAP);
 			break;
 		case 12:
-			screen_write_mode_clear(&ictx->ctx, MODE_BLINKING);
+			screen_write_mode_clear(sctx, MODE_BLINKING);
 			break;
 		case 25:	/* TCEM */
-			screen_write_mode_clear(&ictx->ctx, MODE_CURSOR);
+			screen_write_mode_clear(sctx, MODE_CURSOR);
 			break;
 		case 1000:
 		case 1001:
 		case 1002:
 		case 1003:
-			screen_write_mode_clear(&ictx->ctx, ALL_MOUSE_MODES);
+			screen_write_mode_clear(sctx, ALL_MOUSE_MODES);
 			break;
 		case 1004:
-			screen_write_mode_clear(&ictx->ctx, MODE_FOCUSON);
+			screen_write_mode_clear(sctx, MODE_FOCUSON);
 			break;
 		case 1005:
-			screen_write_mode_clear(&ictx->ctx, MODE_MOUSE_UTF8);
+			screen_write_mode_clear(sctx, MODE_MOUSE_UTF8);
 			break;
 		case 1006:
-			screen_write_mode_clear(&ictx->ctx, MODE_MOUSE_SGR);
+			screen_write_mode_clear(sctx, MODE_MOUSE_SGR);
 			break;
 		case 47:
 		case 1047:
@@ -1607,7 +1611,7 @@ input_csi_dispatch_rm_private(struct input_ctx *ictx)
 			window_pane_alternate_off(wp, &ictx->cell.cell, 1);
 			break;
 		case 2004:
-			screen_write_mode_clear(&ictx->ctx, MODE_BRACKETPASTE);
+			screen_write_mode_clear(sctx, MODE_BRACKETPASTE);
 			break;
 		default:
 			log_debug("%s: unknown '%c'", __func__, ictx->ch);
@@ -1620,17 +1624,18 @@ input_csi_dispatch_rm_private(struct input_ctx *ictx)
 static void
 input_csi_dispatch_sm(struct input_ctx *ictx)
 {
-	u_int	i;
+	struct screen_write_ctx	*sctx = &ictx->ctx;
+	u_int			 i;
 
 	for (i = 0; i < ictx->param_list_len; i++) {
 		switch (input_get(ictx, i, 0, -1)) {
 		case -1:
 			break;
 		case 4:		/* IRM */
-			screen_write_mode_set(&ictx->ctx, MODE_INSERT);
+			screen_write_mode_set(sctx, MODE_INSERT);
 			break;
 		case 34:
-			screen_write_mode_clear(&ictx->ctx, MODE_BLINKING);
+			screen_write_mode_clear(sctx, MODE_BLINKING);
 			break;
 		default:
 			log_debug("%s: unknown '%c'", __func__, ictx->ch);
@@ -1643,6 +1648,7 @@ input_csi_dispatch_sm(struct input_ctx *ictx)
 static void
 input_csi_dispatch_sm_private(struct input_ctx *ictx)
 {
+	struct screen_write_ctx	*sctx = &ictx->ctx;
 	struct window_pane	*wp = ictx->wp;
 	u_int			 i;
 
@@ -1651,49 +1657,48 @@ input_csi_dispatch_sm_private(struct input_ctx *ictx)
 		case -1:
 			break;
 		case 1:		/* DECCKM */
-			screen_write_mode_set(&ictx->ctx, MODE_KCURSOR);
+			screen_write_mode_set(sctx, MODE_KCURSOR);
 			break;
 		case 3:		/* DECCOLM */
-			screen_write_cursormove(&ictx->ctx, 0, 0);
-			screen_write_clearscreen(&ictx->ctx,
-			    ictx->cell.cell.bg);
+			screen_write_cursormove(sctx, 0, 0);
+			screen_write_clearscreen(sctx, ictx->cell.cell.bg);
 			break;
 		case 6:		/* DECOM */
-			screen_write_mode_set(&ictx->ctx, MODE_ORIGIN);
-			screen_write_cursormove(&ictx->ctx, 0, 0);
+			screen_write_mode_set(sctx, MODE_ORIGIN);
+			screen_write_cursormove(sctx, 0, 0);
 			break;
 		case 7:		/* DECAWM */
-			screen_write_mode_set(&ictx->ctx, MODE_WRAP);
+			screen_write_mode_set(sctx, MODE_WRAP);
 			break;
 		case 12:
-			screen_write_mode_set(&ictx->ctx, MODE_BLINKING);
+			screen_write_mode_set(sctx, MODE_BLINKING);
 			break;
 		case 25:	/* TCEM */
-			screen_write_mode_set(&ictx->ctx, MODE_CURSOR);
+			screen_write_mode_set(sctx, MODE_CURSOR);
 			break;
 		case 1000:
-			screen_write_mode_clear(&ictx->ctx, ALL_MOUSE_MODES);
-			screen_write_mode_set(&ictx->ctx, MODE_MOUSE_STANDARD);
+			screen_write_mode_clear(sctx, ALL_MOUSE_MODES);
+			screen_write_mode_set(sctx, MODE_MOUSE_STANDARD);
 			break;
 		case 1002:
-			screen_write_mode_clear(&ictx->ctx, ALL_MOUSE_MODES);
-			screen_write_mode_set(&ictx->ctx, MODE_MOUSE_BUTTON);
+			screen_write_mode_clear(sctx, ALL_MOUSE_MODES);
+			screen_write_mode_set(sctx, MODE_MOUSE_BUTTON);
 			break;
 		case 1003:
-			screen_write_mode_clear(&ictx->ctx, ALL_MOUSE_MODES);
-			screen_write_mode_set(&ictx->ctx, MODE_MOUSE_ALL);
+			screen_write_mode_clear(sctx, ALL_MOUSE_MODES);
+			screen_write_mode_set(sctx, MODE_MOUSE_ALL);
 			break;
 		case 1004:
-			if (ictx->ctx.s->mode & MODE_FOCUSON)
+			if (sctx->s->mode & MODE_FOCUSON)
 				break;
-			screen_write_mode_set(&ictx->ctx, MODE_FOCUSON);
+			screen_write_mode_set(sctx, MODE_FOCUSON);
 			wp->flags |= PANE_FOCUSPUSH; /* force update */
 			break;
 		case 1005:
-			screen_write_mode_set(&ictx->ctx, MODE_MOUSE_UTF8);
+			screen_write_mode_set(sctx, MODE_MOUSE_UTF8);
 			break;
 		case 1006:
-			screen_write_mode_set(&ictx->ctx, MODE_MOUSE_SGR);
+			screen_write_mode_set(sctx, MODE_MOUSE_SGR);
 			break;
 		case 47:
 		case 1047:
@@ -1703,7 +1708,7 @@ input_csi_dispatch_sm_private(struct input_ctx *ictx)
 			window_pane_alternate_on(wp, &ictx->cell.cell, 1);
 			break;
 		case 2004:
-			screen_write_mode_set(&ictx->ctx, MODE_BRACKETPASTE);
+			screen_write_mode_set(sctx, MODE_BRACKETPASTE);
 			break;
 		default:
 			log_debug("%s: unknown '%c'", __func__, ictx->ch);
@@ -1716,6 +1721,7 @@ input_csi_dispatch_sm_private(struct input_ctx *ictx)
 static void
 input_csi_dispatch_winops(struct input_ctx *ictx)
 {
+	struct screen_write_ctx	*sctx = &ictx->ctx;
 	struct window_pane	*wp = ictx->wp;
 	int			 n, m;
 
@@ -1755,7 +1761,7 @@ input_csi_dispatch_winops(struct input_ctx *ictx)
 				return;
 			case 0:
 			case 2:
-				screen_push_title(ictx->ctx.s);
+				screen_push_title(sctx->s);
 				break;
 			}
 			break;
@@ -1766,7 +1772,7 @@ input_csi_dispatch_winops(struct input_ctx *ictx)
 				return;
 			case 0:
 			case 2:
-				screen_pop_title(ictx->ctx.s);
+				screen_pop_title(sctx->s);
 				server_status_window(ictx->wp->window);
 				break;
 			}
@@ -2089,20 +2095,19 @@ input_enter_dcs(struct input_ctx *ictx)
 static int
 input_dcs_dispatch(struct input_ctx *ictx)
 {
-	const char	prefix[] = "tmux;";
-	const u_int	prefix_len = (sizeof prefix) - 1;
+	struct screen_write_ctx	*sctx = &ictx->ctx;
+	u_char			*buf = ictx->input_buf;
+	size_t			 len = ictx->input_len;
+	const char		 prefix[] = "tmux;";
+	const u_int		 prefixlen = (sizeof prefix) - 1;
 
 	if (ictx->flags & INPUT_DISCARD)
 		return (0);
 
-	log_debug("%s: \"%s\"", __func__, ictx->input_buf);
+	log_debug("%s: \"%s\"", __func__, buf);
 
-	/* Check for tmux prefix. */
-	if (ictx->input_len >= prefix_len &&
-	    strncmp(ictx->input_buf, prefix, prefix_len) == 0) {
-		screen_write_rawstring(&ictx->ctx,
-		    ictx->input_buf + prefix_len, ictx->input_len - prefix_len);
-	}
+	if (len >= prefixlen && strncmp(buf, prefix, prefixlen) == 0)
+		screen_write_rawstring(sctx, buf + prefixlen, len - prefixlen);
 
 	return (0);
 }
@@ -2122,8 +2127,9 @@ input_enter_osc(struct input_ctx *ictx)
 static void
 input_exit_osc(struct input_ctx *ictx)
 {
-	u_char	*p = ictx->input_buf;
-	u_int	 option;
+	struct screen_write_ctx	*sctx = &ictx->ctx;
+	u_char			*p = ictx->input_buf;
+	u_int			 option;
 
 	if (ictx->flags & INPUT_DISCARD)
 		return;
@@ -2143,7 +2149,7 @@ input_exit_osc(struct input_ctx *ictx)
 	case 0:
 	case 2:
 		if (utf8_isvalid(p)) {
-			screen_set_title(ictx->ctx.s, p);
+			screen_set_title(sctx->s, p);
 			server_status_window(ictx->wp->window);
 		}
 		break;
@@ -2158,7 +2164,7 @@ input_exit_osc(struct input_ctx *ictx)
 		break;
 	case 12:
 		if (utf8_isvalid(p) && *p != '?') /* ? is colour request */
-			screen_set_cursor_colour(ictx->ctx.s, p);
+			screen_set_cursor_colour(sctx->s, p);
 		break;
 	case 52:
 		input_osc_52(ictx, p);
@@ -2168,7 +2174,7 @@ input_exit_osc(struct input_ctx *ictx)
 		break;
 	case 112:
 		if (*p == '\0') /* no arguments allowed */
-			screen_set_cursor_colour(ictx->ctx.s, "");
+			screen_set_cursor_colour(sctx->s, "");
 		break;
 	default:
 		log_debug("%s: unknown '%u'", __func__, option);
@@ -2191,13 +2197,15 @@ input_enter_apc(struct input_ctx *ictx)
 static void
 input_exit_apc(struct input_ctx *ictx)
 {
+	struct screen_write_ctx	*sctx = &ictx->ctx;
+
 	if (ictx->flags & INPUT_DISCARD)
 		return;
 	log_debug("%s: \"%s\"", __func__, ictx->input_buf);
 
 	if (!utf8_isvalid(ictx->input_buf))
 		return;
-	screen_set_title(ictx->ctx.s, ictx->input_buf);
+	screen_set_title(sctx->s, ictx->input_buf);
 	server_status_window(ictx->wp->window);
 }
 
@@ -2233,6 +2241,7 @@ input_exit_rename(struct input_ctx *ictx)
 static int
 input_top_bit_set(struct input_ctx *ictx)
 {
+	struct screen_write_ctx	*sctx = &ictx->ctx;
 	struct utf8_data	*ud = &ictx->utf8data;
 
 	ictx->last = -1;
@@ -2259,7 +2268,7 @@ input_top_bit_set(struct input_ctx *ictx)
 	    (int)ud->size, ud->data, ud->width);
 
 	utf8_copy(&ictx->cell.cell.data, ud);
-	screen_write_collect_add(&ictx->ctx, &ictx->cell.cell);
+	screen_write_collect_add(sctx, &ictx->cell.cell);
 
 	return (0);
 }
@@ -2270,7 +2279,7 @@ input_osc_4(struct input_ctx *ictx, const char *p)
 {
 	struct window_pane	*wp = ictx->wp;
 	char			*copy, *s, *next = NULL;
-	long	 		idx;
+	long	 		 idx;
 	u_int			 r, g, b;
 
 	copy = s = xstrdup(p);
@@ -2410,7 +2419,7 @@ input_osc_104(struct input_ctx *ictx, const char *p)
 {
 	struct window_pane	*wp = ictx->wp;
 	char			*copy, *s;
-	long			idx;
+	long			 idx;
 
 	if (*p == '\0') {
 		window_pane_reset_palette(wp);