Add accessors for grid linedata member, for some future work. From Dan

Aloni.

format.c

@@ -548,11 +548,11 @@ format_cb_history_bytes(struct format_tree *ft, struct format_entry *fe)
 
 	size = 0;
 	for (i = 0; i < gd->hsize; i++) {
-		gl = &gd->linedata[i];
+		gl = grid_get_line(gd, i);
 		size += gl->cellsize * sizeof *gl->celldata;
 		size += gl->extdsize * sizeof *gl->extddata;
 	}
-	size += gd->hsize * sizeof *gd->linedata;
+	size += gd->hsize * sizeof *gl;
 
 	xasprintf(&fe->value, "%llu", size);
 }

grid-view.c

@@ -64,7 +64,7 @@ grid_view_clear_history(struct grid *gd, u_int bg)
 	/* Find the last used line. */
 	last = 0;
 	for (yy = 0; yy < gd->sy; yy++) {
-		gl = &gd->linedata[grid_view_y(gd, yy)];
+		gl = grid_get_line(gd, grid_view_y(gd, yy));
 		if (gl->cellused != 0)
 			last = yy + 1;
 	}

grid.c

@@ -145,6 +145,18 @@ grid_extended_cell(struct grid_line *gl, struct grid_cell_entry *gce,
 	return (gcp);
 }
 
+struct grid_line *
+grid_get_line(struct grid *gd, u_int line)
+{
+	return (&gd->linedata[line]);
+}
+
+void
+grid_adjust_lines(struct grid *gd, u_int lines)
+{
+	gd->linedata = xreallocarray(gd->linedata, lines, sizeof *gd->linedata);
+}
+
 /* Copy default into a cell. */
 static void
 grid_clear_cell(struct grid *gd, u_int px, u_int py, u_int bg)

screen-write.c

@@ -408,7 +408,7 @@ screen_write_fast_copy(struct screen_write_ctx *ctx, struct screen *src,
 			break;
 		cx = s->cx;
 		for (xx = px; xx < px + nx; xx++) {
-			if (xx >= gd->linedata[yy].cellsize)
+			if (xx >= grid_get_line(gd, yy)->cellsize)
 				break;
 			grid_get_cell(gd, xx, yy, &gc);
 			if (xx + gc.data.width > px + nx)
@@ -694,7 +694,7 @@ screen_write_backspace(struct screen_write_ctx *ctx)
 	if (s->cx == 0) {
 		if (s->cy == 0)
 			return;
-		gl = &s->grid->linedata[s->grid->hsize + s->cy - 1];
+		gl = grid_get_line(s->grid, s->grid->hsize + s->cy - 1);
 		if (gl->flags & GRID_LINE_WRAPPED) {
 			s->cy--;
 			s->cx = screen_size_x(s) - 1;
@@ -917,7 +917,7 @@ screen_write_clearline(struct screen_write_ctx *ctx, u_int bg)
 	struct tty_ctx		 ttyctx;
 	u_int			 sx = screen_size_x(s);
 
-	gl = &s->grid->linedata[s->grid->hsize + s->cy];
+	gl = grid_get_line(s->grid, s->grid->hsize + s->cy);
 	if (gl->cellsize == 0 && bg == 8)
 		return;
 
@@ -940,7 +940,7 @@ screen_write_clearendofline(struct screen_write_ctx *ctx, u_int bg)
 	struct tty_ctx		 ttyctx;
 	u_int			 sx = screen_size_x(s);
 
-	gl = &s->grid->linedata[s->grid->hsize + s->cy];
+	gl = grid_get_line(s->grid, s->grid->hsize + s->cy);
 	if (s->cx > sx - 1 || (s->cx >= gl->cellsize && bg == 8))
 		return;
 
@@ -1043,7 +1043,7 @@ screen_write_linefeed(struct screen_write_ctx *ctx, int wrapped, u_int bg)
 	struct grid		*gd = s->grid;
 	struct grid_line	*gl;
 
-	gl = &gd->linedata[gd->hsize + s->cy];
+	gl = grid_get_line(gd, gd->hsize + s->cy);
 	if (wrapped)
 		gl->flags |= GRID_LINE_WRAPPED;
 	else
@@ -1433,7 +1433,7 @@ screen_write_cell(struct screen_write_ctx *ctx, const struct grid_cell *gc)
 	screen_write_initctx(ctx, &ttyctx);
 
 	/* Handle overwriting of UTF-8 characters. */
-	gl = &s->grid->linedata[s->grid->hsize + s->cy];
+	gl = grid_get_line(s->grid, s->grid->hsize + s->cy);
 	if (gl->flags & GRID_LINE_EXTENDED) {
 		grid_view_get_cell(gd, s->cx, s->cy, &now_gc);
 		if (screen_write_overwrite(ctx, &now_gc, width))

screen.c

@@ -281,9 +281,8 @@ screen_resize_y(struct screen *s, u_int sy)
 		s->cy -= needed;
 	}
 
-	/* Resize line arrays. */
-	gd->linedata = xreallocarray(gd->linedata, gd->hsize + sy,
-	    sizeof *gd->linedata);
+	/* Resize line array. */
+	grid_adjust_lines(gd, gd->hsize + sy);
 
 	/* Size increasing. */
 	if (sy > oldy) {
@@ -306,7 +305,7 @@ screen_resize_y(struct screen *s, u_int sy)
 
 		/* Then fill the rest in with blanks. */
 		for (i = gd->hsize + sy - needed; i < gd->hsize + sy; i++)
-			memset(&gd->linedata[i], 0, sizeof gd->linedata[i]);
+			memset(grid_get_line(gd, i), 0, sizeof(struct grid_line));
 	}
 
 	/* Set the new size, and reset the scroll region. */

tmux.h

@@ -2006,6 +2006,8 @@ char	*grid_string_cells(struct grid *, u_int, u_int, u_int,
 void	 grid_duplicate_lines(struct grid *, u_int, struct grid *, u_int,
 	     u_int);
 void	 grid_reflow(struct grid *, u_int, u_int *);
+struct grid_line *grid_get_line(struct grid *, u_int);
+void	 grid_adjust_lines(struct grid *, u_int);
 
 /* grid-view.c */
 void	 grid_view_get_cell(struct grid *, u_int, u_int, struct grid_cell *);

tty.c

@@ -913,6 +913,7 @@ tty_draw_line(struct tty *tty, const struct window_pane *wp,
 	int			 flags, cleared = 0;
 	char			 buf[512];
 	size_t			 len, old_len;
+	u_int			 cellsize;
 
 	flags = (tty->flags & TTY_NOCURSOR);
 	tty->flags |= TTY_NOCURSOR;
@@ -926,15 +927,17 @@ tty_draw_line(struct tty *tty, const struct window_pane *wp,
 	 * there may be empty background cells after it (from BCE).
 	 */
 	sx = screen_size_x(s);
-	if (sx > gd->linedata[gd->hsize + py].cellsize)
-		sx = gd->linedata[gd->hsize + py].cellsize;
+
+	cellsize = grid_get_line(gd, gd->hsize + py)->cellsize;
+	if (sx > cellsize)
+		sx = cellsize;
 	if (sx > tty->sx)
 		sx = tty->sx;
 	ux = 0;
 
 	if (wp == NULL ||
 	    py == 0 ||
-	    (~gd->linedata[gd->hsize + py - 1].flags & GRID_LINE_WRAPPED) ||
+	    (~grid_get_line(gd, gd->hsize + py - 1)->flags & GRID_LINE_WRAPPED) ||
 	    ox != 0 ||
 	    tty->cx < tty->sx ||
 	    screen_size_x(s) < tty->sx) {

window-copy.c

@@ -1755,7 +1755,7 @@ window_copy_copy_line(struct window_pane *wp, char **buf, size_t *off, u_int sy,
 	 * Work out if the line was wrapped at the screen edge and all of it is
 	 * on screen.
 	 */
-	gl = &gd->linedata[sy];
+	gl = grid_get_line(gd, sy);
 	if (gl->flags & GRID_LINE_WRAPPED && gl->cellsize <= gd->sx)
 		wrapped = 1;
 
@@ -1843,7 +1843,7 @@ window_copy_find_length(struct window_pane *wp, u_int py)
 	 * width of the grid, and screen_write_copy treats them as spaces, so
 	 * ignore them here too.
 	 */
-	px = s->grid->linedata[py].cellsize;
+	px = grid_get_line(s->grid, py)->cellsize;
 	if (px > screen_size_x(s))
 		px = screen_size_x(s);
 	while (px > 0) {
@@ -1867,7 +1867,7 @@ window_copy_cursor_start_of_line(struct window_pane *wp)
 	if (data->cx == 0 && s->sel.lineflag == LINE_SEL_NONE) {
 		py = screen_hsize(back_s) + data->cy - data->oy;
 		while (py > 0 &&
-		    gd->linedata[py-1].flags & GRID_LINE_WRAPPED) {
+		    grid_get_line(gd, py - 1)->flags & GRID_LINE_WRAPPED) {
 			window_copy_cursor_up(wp, 0);
 			py = screen_hsize(back_s) + data->cy - data->oy;
 		}
@@ -1907,6 +1907,7 @@ window_copy_cursor_end_of_line(struct window_pane *wp)
 	struct screen			*back_s = data->backing;
 	struct screen			*s = &data->screen;
 	struct grid			*gd = back_s->grid;
+	struct grid_line		*gl;
 	u_int				 px, py;
 
 	py = screen_hsize(back_s) + data->cy - data->oy;
@@ -1915,12 +1916,14 @@ window_copy_cursor_end_of_line(struct window_pane *wp)
 	if (data->cx == px && s->sel.lineflag == LINE_SEL_NONE) {
 		if (data->screen.sel.flag && data->rectflag)
 			px = screen_size_x(back_s);
-		if (gd->linedata[py].flags & GRID_LINE_WRAPPED) {
-			while (py < gd->sy + gd->hsize &&
-			    gd->linedata[py].flags & GRID_LINE_WRAPPED) {
+		gl = grid_get_line(gd, py);
+		if (gl->flags & GRID_LINE_WRAPPED) {
+			while (py < gd->sy + gd->hsize) {
+				gl = grid_get_line(gd, py);
+				if (~gl->flags & GRID_LINE_WRAPPED)
+					break;
 				window_copy_cursor_down(wp, 0);
-				py = screen_hsize(back_s)
-				     + data->cy - data->oy;
+				py = screen_hsize(back_s) + data->cy - data->oy;
 			}
 			px = window_copy_find_length(wp, py);
 		}