Merge branch 'floating_panes' into floating_panes_staging

layout-custom.c

@@ -289,7 +289,7 @@ layout_parse(struct window *w, const char *layout, char **cause)
 	if (floating_lc != NULL)
 		layout_assign(&wp, floating_lc, PANE_FLOATING);
 
-        /* Fix pane Z indexes. */
+        /* Fix pane z-indexes. */
         while (!TAILQ_EMPTY(&w->z_index)) {
                 wp = TAILQ_FIRST(&w->z_index);
 		TAILQ_REMOVE(&w->z_index, wp, zentry);
@@ -305,7 +305,6 @@ layout_parse(struct window *w, const char *layout, char **cause)
 	layout_print_cell(tiled_lc, __func__, 0);
 
 	/* Free the floating layout cell, no longer needed. */
-	if (floating_lc != NULL)
 	layout_free_cell(floating_lc);
 
 	notify_window("window-layout-changed", w);

layout.c

@@ -78,6 +78,9 @@ layout_free_cell(struct layout_cell *lc)
 {
 	struct layout_cell	*lcchild;
 
+	if (lc == NULL)
+		return;
+
 	switch (lc->type) {
 	case LAYOUT_LEFTRIGHT:
 	case LAYOUT_TOPBOTTOM:
@@ -233,7 +236,7 @@ layout_make_node(struct layout_cell *lc, enum layout_type type)
 	lc->wp = NULL;
 }
 
-/* Fix Z indexes. */
+/* Fix z-indexes. */
 void
 layout_fix_zindexes(struct window *w, struct layout_cell *lc)
 {

screen-redraw.c

@@ -713,10 +713,8 @@ screen_redraw_draw_pane_status(struct screen_redraw_ctx *ctx)
 		}
 
 		r = screen_redraw_get_visible_ranges(wp, x, yoff, width, NULL);
-
 		if (ctx->statustop)
 			yoff += ctx->statuslines;
-
 		for (i = 0; i < r->used; i++) {
 			ri = &r->ranges[i];
 			if (ri->nx == 0)
@@ -1267,7 +1265,6 @@ screen_redraw_get_visible_ranges(struct window_pane *base_wp, u_int px,
 	return (r);
 }
 
-
 /* Draw one pane. */
 static void
 screen_redraw_draw_pane(struct screen_redraw_ctx *ctx, struct window_pane *wp)
@@ -1278,7 +1275,7 @@ screen_redraw_draw_pane(struct screen_redraw_ctx *ctx, struct window_pane *wp)
 	struct screen		*s = wp->screen;
 	struct colour_palette	*palette = &wp->palette;
 	struct grid_cell	 defaults;
-	u_int			 i, j, woy, wx, wy, px, py, width;
+	u_int			 i, j, woy, wx, wy, py, width;
 	struct visible_ranges	*r;
 	struct visible_range	*ri;
 
@@ -1291,25 +1288,20 @@ screen_redraw_draw_pane(struct screen_redraw_ctx *ctx, struct window_pane *wp)
 	    wp->xoff >= (int)ctx->ox + (int)ctx->sx)
 		return;
 
-	/* woy is window y offset in tty. */
 	if (ctx->statustop)
 		woy = ctx->statuslines;
 	else
 		woy = 0;
-
 	for (j = 0; j < wp->sy; j++) {
 		if (wp->yoff + (int)j < (int)ctx->oy ||
 		    wp->yoff + (int)j >= (int)ctx->oy + (int)ctx->sy)
 			continue;
-		wy = wp->yoff + j;		/* y line within window w. */
-		py = woy + wy - ctx->oy;	/* y line within tty. */
-		if (py > tty->sy)
+		wy = wp->yoff + j;       /* y line within window w */
+		py = woy + wy - ctx->oy; /* y line within tty */
+		if (py > tty->sy) {
 			/* Continue if this line is off of tty. */
 			continue;
-
-		/* Note: i is apparenty not used now that the vr array
-		 *  returns where in s to read from.
-		 */
+		}
 		if (wp->xoff >= (int)ctx->ox &&
 		    wp->xoff + (int)wp->sx <= (int)ctx->ox + (int)ctx->sx) {
 			/* All visible. */
@@ -1338,16 +1330,13 @@ screen_redraw_draw_pane(struct screen_redraw_ctx *ctx, struct window_pane *wp)
 
 		/* Get visible ranges of line before we draw it. */
 		r = screen_redraw_get_visible_ranges(wp, wx, wy, width, NULL);
-
 		tty_default_colours(&defaults, wp);
-
-		for (i=0; i < r->used; i++) {
+		for (i = 0; i < r->used; i++) {
 			ri = &r->ranges[i];
 			if (ri->nx == 0)
 				continue;
-			px = ri->px;
-			tty_draw_line(tty, s, ri->px - wp->xoff, j,
-			    ri->nx, px, py, &defaults, palette);
+			tty_draw_line(tty, s, ri->px - wp->xoff, j, ri->nx,
+			    ri->px, py, &defaults, palette);
 		}
 	}
 
@@ -1442,8 +1431,8 @@ screen_redraw_draw_scrollbar(struct screen_redraw_ctx *ctx,
 	struct visible_ranges	*r;
 
 	/*
-	 * Size and offset of window relative to tty.
-	 * Status at top offsets window downward.
+	 * Size and offset of window relative to tty. Status at top offsets
+	 * window downward.
 	 */
 	sx = ctx->sx;
 	sy = tty->sy - ctx->statuslines;
@@ -1451,8 +1440,8 @@ screen_redraw_draw_scrollbar(struct screen_redraw_ctx *ctx,
 	oy = ctx->oy;
 	if (ctx->statustop) {
 		sb_y += ctx->statuslines;
-		sy += ctx->statuslines;		/* Height of window in tty. */
-		oy += ctx->statuslines;		/* Top of window in tty. */
+		sy += ctx->statuslines;	/* height of window */
+		oy += ctx->statuslines;	/* top of window */
 	}
 
 	gc = sb_style->gc;
@@ -1460,17 +1449,20 @@ screen_redraw_draw_scrollbar(struct screen_redraw_ctx *ctx,
 	slgc.fg = gc.bg;
 	slgc.bg = gc.fg;
 
-	if (sb_x + (int)sb_w < 0 || sb_x >= sx || sb_y >= sy)
-		/* Whole sb off screen. */
+	if (sb_x + (int)sb_w < 0 || sb_x >= sx || sb_y >= sy) {
+		/* Whole scrollbar is off screen. */
 		return;
-	if (sb_x < 0)
-		/* Part of sb on screen. */
+	}
+	if (sb_x < 0) {
+		/* Part of scrollbar on screen. */
 		imin = - sb_x;
+	}
 	imax = sb_w + sb_pad;
 	if ((int)imax + sb_x > sx) {
-		if (sb_x > sx)
-			/* Whole sb off screen. */
+		if (sb_x > sx) {
+			/* Whole scrollbar off screen. */
 			return;
+		}
 		imax = sx - sb_x;
 	}
 	jmax = sb_h;
@@ -1485,34 +1477,37 @@ screen_redraw_draw_scrollbar(struct screen_redraw_ctx *ctx,
 	 * subtracting the pan offset oy.
 	 */
 	sb_tty_y = sb_y - oy; /* scrollbar top in tty coordinates */
-
-	if (sb_tty_y > (int)sy)
-		/* Whole sb off screen. */
+	if (sb_tty_y > (int)sy) {
+		/* Whole scrollbar is off screen. */
 		return;
-	if (sb_tty_y < 0)
+	}
+	if (sb_tty_y < 0) {
 		/* Scrollbar starts above visible area; skip those rows. */
 		jmin = -sb_tty_y;
-	if (sb_tty_y + (int)sb_h <= 0)
-		/* Whole sb above visible area. */
+	}
+	if (sb_tty_y + (int)sb_h <= 0) {
+		/* Whole scrollbar above visible area. */
 		return;
+	}
 	jmax = sb_h;
-	if (sb_tty_y + (int)jmax > (int)sy)
+	if (sb_tty_y + (int)jmax > (int)sy) {
 		/* Clip to height of tty. */
 		jmax = sy - sb_tty_y;
+	}
 
 	for (j = jmin; j < jmax; j++) {
-		wy = sb_y + j;		/* window y coordinate. */
-		py = sb_tty_y + j;	/* tty y coordinate. */
+		wy = sb_y + j;	   /* window y coordinate */
+		py = sb_tty_y + j;/* tty y coordinate */
 		r = tty_check_overlay_range(tty, sb_x, wy, imax);
 		r = screen_redraw_get_visible_ranges(wp, sb_x, wy, imax, r);
 		for (i = imin; i < imax; i++) {
-			px = sb_x + ox + i;	/* tty x coordinate. */
-			wx = sb_x + i;		/* window x coordinate. */
+			px = sb_x + ox + i; /* tty x coordinate */
+			wx = sb_x + i;	    /* window x coordinate */
 			if (wx < xoff - (int)sb_w - (int)sb_pad ||
 			    px >= sx || px < 0 ||
 			    wy < yoff - 1 ||
 			    py >= sy || py < 0 ||
-			    ! screen_redraw_is_visible(r, wx))
+			    !screen_redraw_is_visible(r, wx))
 				continue;
 			tty_cursor(tty, px, py);
 			if ((sb_pos == PANE_SCROLLBARS_LEFT &&

screen-write.c

@@ -1115,7 +1115,9 @@ screen_write_alignmenttest(struct screen_write_ctx *ctx)
 	struct screen		*s = ctx->s;
 	struct tty_ctx	 	 ttyctx;
 	struct grid_cell       	 gc;
-	u_int			 xx, yy;
+	u_int			 xx, yy, sx, xoff, yoff, cx, i, n;
+	struct visible_ranges	*r;
+	struct visible_range	*ri;
 
 	memcpy(&gc, &grid_default_cell, sizeof gc);
 	utf8_set(&gc.data, 'E');
@@ -1138,7 +1140,33 @@ screen_write_alignmenttest(struct screen_write_ctx *ctx)
 	screen_write_initctx(ctx, &ttyctx, 1, 1);
 
 	screen_write_collect_clear(ctx, 0, screen_size_y(s) - 1);
+
+	if (~ttyctx.flags & TTY_CTX_PANE_OBSCURED || ctx->wp == NULL) {
 		tty_write(tty_cmd_alignmenttest, &ttyctx);
+		return;
+	}
+
+	sx = screen_size_x(s);
+	xoff = ctx->wp->xoff;
+	yoff = ctx->wp->yoff;
+
+	for (yy = 0; yy < screen_size_y(s); yy++) {
+		r = screen_redraw_get_visible_ranges(ctx->wp,
+		    xoff, yoff + yy, sx, NULL);
+		for (i = 0; i < r->used; i++) {
+			ri = &r->ranges[i];
+			if (ri->nx == 0)
+				continue;
+
+			cx = ri->px - xoff;
+			for (n = 0; n < ri->nx && cx < sx; n++, cx++) {
+				ttyctx.ocx = cx;
+				ttyctx.ocy = yy;
+				ttyctx.cell = &gc;
+				tty_write(tty_cmd_cell, &ttyctx);
+			}
+		}
+	}
 }
 
 /* Insert nx characters. */
@@ -1147,6 +1175,10 @@ screen_write_insertcharacter(struct screen_write_ctx *ctx, u_int nx, u_int bg)
 {
 	struct screen		*s = ctx->s;
 	struct tty_ctx		 ttyctx;
+	u_int			 sx, xoff, yoff, cx, n, i;
+	struct visible_ranges	*r;
+	struct visible_range	*ri;
+	struct grid_cell	 gc;
 
 	if (nx == 0)
 		nx = 1;
@@ -1171,7 +1203,32 @@ screen_write_insertcharacter(struct screen_write_ctx *ctx, u_int nx, u_int bg)
 
 	screen_write_collect_flush(ctx, 0, __func__);
 	ttyctx.n = nx;
+
+	if (~ttyctx.flags & TTY_CTX_PANE_OBSCURED || ctx->wp == NULL) {
 		tty_write(tty_cmd_insertcharacter, &ttyctx);
+		return;
+	}
+
+	xoff = ctx->wp->xoff;
+	yoff = ctx->wp->yoff;
+	sx = screen_size_x(s);
+
+	r = screen_redraw_get_visible_ranges(ctx->wp,
+	    xoff + s->cx, yoff + s->cy, sx - s->cx, NULL);
+
+	for (i = 0; i < r->used; i++) {
+		ri = &r->ranges[i];
+		if (ri->nx == 0)
+			continue;
+
+		cx = ri->px - xoff;
+		for (n = 0; n < ri->nx && cx < sx; n++, cx++) {
+			grid_view_get_cell(s->grid, cx, s->cy, &gc);
+			screen_write_set_cursor(ctx, cx, -1);
+			ttyctx.cell = &gc;
+			tty_write(tty_cmd_cell, &ttyctx);
+		}
+	}
 }
 
 /* Delete nx characters. */
@@ -1180,6 +1237,10 @@ screen_write_deletecharacter(struct screen_write_ctx *ctx, u_int nx, u_int bg)
 {
 	struct screen		*s = ctx->s;
 	struct tty_ctx		 ttyctx;
+	u_int			 sx, xoff, yoff, cx, n, i;
+	struct visible_ranges	*r;
+	struct visible_range	*ri;
+	struct grid_cell	 gc;
 
 	if (nx == 0)
 		nx = 1;
@@ -1204,7 +1265,32 @@ screen_write_deletecharacter(struct screen_write_ctx *ctx, u_int nx, u_int bg)
 
 	screen_write_collect_flush(ctx, 0, __func__);
 	ttyctx.n = nx;
+
+	if (~ttyctx.flags & TTY_CTX_PANE_OBSCURED || ctx->wp == NULL) {
 		tty_write(tty_cmd_deletecharacter, &ttyctx);
+		return;
+	}
+
+	xoff = ctx->wp->xoff;
+	yoff = ctx->wp->yoff;
+	sx = screen_size_x(s);
+
+	r = screen_redraw_get_visible_ranges(ctx->wp,
+	    xoff + s->cx, yoff + s->cy, sx - s->cx, NULL);
+
+	for (i = 0; i < r->used; i++) {
+		ri = &r->ranges[i];
+		if (ri->nx == 0)
+			continue;
+
+		cx = ri->px - xoff;
+		for (n = 0; n < ri->nx && cx < sx; n++, cx++) {
+			grid_view_get_cell(s->grid, cx, s->cy, &gc);
+			screen_write_set_cursor(ctx, cx, -1);
+			ttyctx.cell = &gc;
+			tty_write(tty_cmd_cell, &ttyctx);
+		}
+	}
 }
 
 /* Clear nx characters. */
@@ -1213,6 +1299,10 @@ screen_write_clearcharacter(struct screen_write_ctx *ctx, u_int nx, u_int bg)
 {
 	struct screen		*s = ctx->s;
 	struct tty_ctx		 ttyctx;
+	u_int			 sx, xoff, yoff, cx, n, i;
+	struct visible_ranges	*r;
+	struct visible_range	*ri;
+	struct grid_cell	 gc;
 
 	if (nx == 0)
 		nx = 1;
@@ -1230,14 +1320,39 @@ screen_write_clearcharacter(struct screen_write_ctx *ctx, u_int nx, u_int bg)
 		ctx->wp->flags |= PANE_REDRAW;
 #endif
 
-	screen_write_initctx(ctx, &ttyctx, 0, 0);
+	screen_write_initctx(ctx, &ttyctx, 0, 1);
 	ttyctx.bg = bg;
 
 	grid_view_clear(s->grid, s->cx, s->cy, nx, 1, bg);
 
 	screen_write_collect_flush(ctx, 0, __func__);
 	ttyctx.n = nx;
+
+	if (~ttyctx.flags & TTY_CTX_PANE_OBSCURED || ctx->wp == NULL) {
 		tty_write(tty_cmd_clearcharacter, &ttyctx);
+		return;
+	}
+
+	xoff = ctx->wp->xoff;
+	yoff = ctx->wp->yoff;
+	sx = screen_size_x(s);
+
+	r = screen_redraw_get_visible_ranges(ctx->wp,
+	    xoff + s->cx, yoff + s->cy, sx - s->cx, NULL);
+
+	for (i = 0; i < r->used; i++) {
+		ri = &r->ranges[i];
+		if (ri->nx == 0)
+			continue;
+
+		cx = ri->px - xoff;
+		for (n = 0; n < ri->nx && cx < sx; n++, cx++) {
+			grid_view_get_cell(s->grid, cx, s->cy, &gc);
+			screen_write_set_cursor(ctx, cx, -1);
+			ttyctx.cell = &gc;
+			tty_write(tty_cmd_cell, &ttyctx);
+		}
+	}
 }
 
 /* Insert ny lines. */
@@ -1247,9 +1362,15 @@ screen_write_insertline(struct screen_write_ctx *ctx, u_int ny, u_int bg)
 	struct screen		*s = ctx->s;
 	struct grid		*gd = s->grid;
 	struct tty_ctx		 ttyctx;
+	u_int			 sx, sy, xoff, yoff, y, cx, i, n;
+	struct visible_ranges	*r;
+	struct visible_range	*ri;
+	struct grid_cell	 gc;
 
 #ifdef ENABLE_SIXEL
-	u_int		 sy = screen_size_y(s);
+	sy = screen_size_y(s);
+#else
+	sy = screen_size_y(s);
 #endif
 
 	if (ny == 0)
@@ -1273,10 +1394,37 @@ screen_write_insertline(struct screen_write_ctx *ctx, u_int ny, u_int bg)
 
 		screen_write_collect_flush(ctx, 0, __func__);
 		ttyctx.n = ny;
+
+		if (~ttyctx.flags & TTY_CTX_PANE_OBSCURED || ctx->wp == NULL) {
 			tty_write(tty_cmd_insertline, &ttyctx);
 			return;
 		}
 
+		sx = screen_size_x(s);
+		xoff = ctx->wp->xoff;
+		yoff = ctx->wp->yoff;
+
+		for (y = s->cy; y < sy; y++) {
+			screen_write_set_cursor(ctx, 0, y);
+			r = screen_redraw_get_visible_ranges(ctx->wp,
+			    xoff, yoff + y, sx, NULL);
+			for (i = 0; i < r->used; i++) {
+				ri = &r->ranges[i];
+				if (ri->nx == 0)
+					continue;
+
+				cx = ri->px - xoff;
+				for (n = 0; n < ri->nx && cx < sx; n++, cx++) {
+					grid_view_get_cell(gd, cx, y, &gc);
+					screen_write_set_cursor(ctx, cx, -1);
+					ttyctx.cell = &gc;
+					tty_write(tty_cmd_cell, &ttyctx);
+				}
+			}
+		}
+		return;
+	}
+
 	if (ny > s->rlower + 1 - s->cy)
 		ny = s->rlower + 1 - s->cy;
 	if (ny == 0)
@@ -1293,7 +1441,34 @@ screen_write_insertline(struct screen_write_ctx *ctx, u_int ny, u_int bg)
 	screen_write_collect_flush(ctx, 0, __func__);
 
 	ttyctx.n = ny;
+
+	if (~ttyctx.flags & TTY_CTX_PANE_OBSCURED || ctx->wp == NULL) {
 		tty_write(tty_cmd_insertline, &ttyctx);
+		return;
+	}
+
+	sx = screen_size_x(s);
+	xoff = ctx->wp->xoff;
+	yoff = ctx->wp->yoff;
+
+	for (y = s->cy; y <= s->rlower; y++) {
+		screen_write_set_cursor(ctx, 0, y);
+		r = screen_redraw_get_visible_ranges(ctx->wp,
+		    xoff, yoff + y, sx, NULL);
+		for (i = 0; i < r->used; i++) {
+			ri = &r->ranges[i];
+			if (ri->nx == 0)
+				continue;
+
+			cx = ri->px - xoff;
+			for (n = 0; n < ri->nx && cx < sx; n++, cx++) {
+				grid_view_get_cell(gd, cx, y, &gc);
+				screen_write_set_cursor(ctx, cx, -1);
+				ttyctx.cell = &gc;
+				tty_write(tty_cmd_cell, &ttyctx);
+			}
+		}
+	}
 }
 
 /* Delete ny lines. */
@@ -1303,7 +1478,12 @@ screen_write_deleteline(struct screen_write_ctx *ctx, u_int ny, u_int bg)
 	struct screen		*s = ctx->s;
 	struct grid		*gd = s->grid;
 	struct tty_ctx		 ttyctx;
-	u_int		 sy = screen_size_y(s);
+	u_int			 sx, sy, xoff, yoff, y, cx, i, n;
+	struct visible_ranges	*r;
+	struct visible_range	*ri;
+	struct grid_cell	 gc;
+
+	sy = screen_size_y(s);
 
 	if (ny == 0)
 		ny = 1;
@@ -1326,10 +1506,37 @@ screen_write_deleteline(struct screen_write_ctx *ctx, u_int ny, u_int bg)
 
 		screen_write_collect_flush(ctx, 0, __func__);
 		ttyctx.n = ny;
+
+		if (~ttyctx.flags & TTY_CTX_PANE_OBSCURED || ctx->wp == NULL) {
 			tty_write(tty_cmd_deleteline, &ttyctx);
 			return;
 		}
 
+		sx = screen_size_x(s);
+		xoff = ctx->wp->xoff;
+		yoff = ctx->wp->yoff;
+
+		for (y = s->cy; y < sy; y++) {
+			screen_write_set_cursor(ctx, 0, y);
+			r = screen_redraw_get_visible_ranges(ctx->wp,
+			    xoff, yoff + y, sx, NULL);
+			for (i = 0; i < r->used; i++) {
+				ri = &r->ranges[i];
+				if (ri->nx == 0)
+					continue;
+
+				cx = ri->px - xoff;
+				for (n = 0; n < ri->nx && cx < sx; n++, cx++) {
+					grid_view_get_cell(gd, cx, y, &gc);
+					screen_write_set_cursor(ctx, cx, -1);
+					ttyctx.cell = &gc;
+					tty_write(tty_cmd_cell, &ttyctx);
+				}
+			}
+		}
+		return;
+	}
+
 	if (ny > s->rlower + 1 - s->cy)
 		ny = s->rlower + 1 - s->cy;
 	if (ny == 0)
@@ -1345,7 +1552,34 @@ screen_write_deleteline(struct screen_write_ctx *ctx, u_int ny, u_int bg)
 
 	screen_write_collect_flush(ctx, 0, __func__);
 	ttyctx.n = ny;
+
+	if (~ttyctx.flags & TTY_CTX_PANE_OBSCURED || ctx->wp == NULL) {
 		tty_write(tty_cmd_deleteline, &ttyctx);
+		return;
+	}
+
+	sx = screen_size_x(s);
+	xoff = ctx->wp->xoff;
+	yoff = ctx->wp->yoff;
+
+	for (y = s->cy; y <= s->rlower; y++) {
+		screen_write_set_cursor(ctx, 0, y);
+		r = screen_redraw_get_visible_ranges(ctx->wp,
+		    xoff, yoff + y, sx, NULL);
+		for (i = 0; i < r->used; i++) {
+			ri = &r->ranges[i];
+			if (ri->nx == 0)
+				continue;
+
+			cx = ri->px - xoff;
+			for (n = 0; n < ri->nx && cx < sx; n++, cx++) {
+				grid_view_get_cell(gd, cx, y, &gc);
+				screen_write_set_cursor(ctx, cx, -1);
+				ttyctx.cell = &gc;
+				tty_write(tty_cmd_cell, &ttyctx);
+			}
+		}
+	}
 }
 
 /* Clear line at cursor. */
@@ -1485,6 +1719,10 @@ screen_write_reverseindex(struct screen_write_ctx *ctx, u_int bg)
 {
 	struct screen		*s = ctx->s;
 	struct tty_ctx		 ttyctx;
+	u_int			 sx, xoff, yoff, cx, i, n;
+	struct visible_ranges	*r;
+	struct visible_range	*ri;
+	struct grid_cell	 gc;
 
 	if (s->cy == s->rupper) {
 #ifdef ENABLE_SIXEL
@@ -1498,10 +1736,33 @@ screen_write_reverseindex(struct screen_write_ctx *ctx, u_int bg)
 		screen_write_initctx(ctx, &ttyctx, 1, 0);
 		ttyctx.bg = bg;
 
+		if (~ttyctx.flags & TTY_CTX_PANE_OBSCURED || ctx->wp == NULL) {
 			tty_write(tty_cmd_reverseindex, &ttyctx);
+			return;
+		}
+
+		sx = screen_size_x(s);
+		xoff = ctx->wp->xoff;
+		yoff = ctx->wp->yoff;
+
+		screen_write_set_cursor(ctx, 0, s->rupper);
+		r = screen_redraw_get_visible_ranges(ctx->wp,
+		    xoff, yoff + s->rupper, sx, NULL);
+		for (i = 0; i < r->used; i++) {
+			ri = &r->ranges[i];
+			if (ri->nx == 0)
+				continue;
+
+			cx = ri->px - xoff;
+			for (n = 0; n < ri->nx && cx < sx; n++, cx++) {
+				grid_view_get_cell(s->grid, cx, s->rupper, &gc);
+				screen_write_set_cursor(ctx, cx, -1);
+				ttyctx.cell = &gc;
+				tty_write(tty_cmd_cell, &ttyctx);
+			}
+		}
 	} else if (s->cy > 0)
 		screen_write_set_cursor(ctx, -1, s->cy - 1);
-
 }
 
 /* Set scroll region. */
@@ -1604,7 +1865,10 @@ screen_write_scrolldown(struct screen_write_ctx *ctx, u_int lines, u_int bg)
 	struct screen		*s = ctx->s;
 	struct grid		*gd = s->grid;
 	struct tty_ctx		 ttyctx;
-	u_int		 i;
+	u_int			 sx, xoff, yoff, y, cx, i, n;
+	struct visible_ranges	*r;
+	struct visible_range	*ri;
+	struct grid_cell	 gc;
 
 	screen_write_initctx(ctx, &ttyctx, 1, 1);
 	ttyctx.bg = bg;
@@ -1624,7 +1888,34 @@ screen_write_scrolldown(struct screen_write_ctx *ctx, u_int lines, u_int bg)
 
 	screen_write_collect_flush(ctx, 0, __func__);
 	ttyctx.n = lines;
+
+	if (~ttyctx.flags & TTY_CTX_PANE_OBSCURED || ctx->wp == NULL) {
 		tty_write(tty_cmd_scrolldown, &ttyctx);
+		return;
+	}
+
+	sx = screen_size_x(s);
+	xoff = ctx->wp->xoff;
+	yoff = ctx->wp->yoff;
+
+	for (y = s->rupper; y <= s->rlower; y++) {
+		screen_write_set_cursor(ctx, 0, y);
+		r = screen_redraw_get_visible_ranges(ctx->wp,
+		    xoff, yoff + y, sx, NULL);
+		for (i = 0; i < r->used; i++) {
+			ri = &r->ranges[i];
+			if (ri->nx == 0)
+				continue;
+
+			cx = ri->px - xoff;
+			for (n = 0; n < ri->nx && cx < sx; n++, cx++) {
+				grid_view_get_cell(gd, cx, y, &gc);
+				screen_write_set_cursor(ctx, cx, -1);
+				ttyctx.cell = &gc;
+				tty_write(tty_cmd_cell, &ttyctx);
+			}
+		}
+	}
 }
 
 /* Carriage return (cursor to start of line). */
@@ -2755,9 +3046,14 @@ screen_write_sixelimage(struct screen_write_ctx *ctx, struct sixel_image *si,
 	}
 	screen_write_collect_flush(ctx, 0, __func__);
 
-	screen_write_initctx(ctx, &ttyctx, 0, 0);
+	screen_write_initctx(ctx, &ttyctx, 0, 1);
 	ttyctx.image = image_store(s, si);
 
+	if ((ttyctx.flags & TTY_CTX_PANE_OBSCURED) && ctx->wp != NULL) {
+		ctx->wp->flags |= PANE_REDRAW;
+		return;
+	}
+
 	tty_write(tty_cmd_sixelimage, &ttyctx);
 
 	screen_write_cursormove(ctx, 0, cy + y, 0);

tmux.1

@@ -8343,7 +8343,7 @@ was created but is not linked to the current session.
 The window with ID
 .Ar window\-id ,
 which is not linked to the current session, was closed.
-.It Ic %unlinked\-window\-renamed Ar window\-id
+.It Ic %unlinked\-window\-renamed Ar window\-id Ar new\-name
 The window with ID
 .Ar window\-id ,
 which is not linked to the current session, was renamed.

tty.c

@@ -1421,8 +1421,6 @@ tty_draw_pane(struct tty *tty, const struct tty_ctx *ctx, u_int py)
 				 */
 				r = tty_check_overlay_range(tty, ctx->xoff,
 				    ctx->yoff + py, nx);
-				r = screen_redraw_get_visible_ranges(wp,
-				    ctx->xoff, ctx->yoff + py, nx, r);
 				for (i = 0; i < r->used; i++) {
 					ri = &r->ranges[i];
 					if (ri->nx == 0) continue;
@@ -1451,12 +1449,12 @@ tty_draw_pane(struct tty *tty, const struct tty_ctx *ctx, u_int py)
 	}
 	if (tty_clamp_line(tty, ctx, 0, py, nx, &px, &x, &rx, &ry)) {
 		if (wp) {
-			r = tty_check_overlay_range(tty, i, py, rx);
+			r = tty_check_overlay_range(tty, px, py, rx);
 			for (i=0; i < r->used; i++) {
 				ri = &r->ranges[i];
 				if (ri->nx == 0)
 					continue;
-				tty_draw_line(tty, s, i, py, ri->nx,
+				tty_draw_line(tty, s, ri->px, py, ri->nx,
 				    x + ri->px, ry, &ctx->defaults,
 				    ctx->palette);
 			}
@@ -2094,7 +2092,6 @@ tty_cmd_cell(struct tty *tty, const struct tty_ctx *ctx)
 	tty_margin_off(tty);
 	tty_cursor_pane_unless_wrap(tty, ctx, ctx->ocx, ctx->ocy);
 
-	if (screen_redraw_is_visible(r, px))
 	tty_cell(tty, ctx->cell, &ctx->defaults, ctx->palette,
 		ctx->s->hyperlinks);
 

window.c

@@ -347,9 +347,7 @@ window_destroy(struct window *w)
 	window_unzoom(w, 0);
 	RB_REMOVE(windows, &windows, w);
 
-	if (w->layout_root != NULL)
 	layout_free_cell(w->layout_root);
-	if (w->saved_layout_root != NULL)
 	layout_free_cell(w->saved_layout_root);
 	free(w->old_layout);