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Fix grid clear code to correctly clear with the default background

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colour rather than ending up with the used count higher than the total
size, GitHub issue 1829.
This commit is contained in:
nicm 2019-07-16 10:30:56 +00:00
parent eac055bfaf
commit b89f2f28bb
2 changed files with 18 additions and 11 deletions

1
grid-view.c
View File

@ -214,7 +214,6 @@ grid_view_delete_cells(struct grid *gd, u_int px, u_int py, u_int nx, u_int bg)
sx = grid_view_x(gd, gd->sx);
grid_move_cells(gd, px, px + nx, py, sx - px - nx, bg);
grid_clear(gd, sx - nx, py, px + nx - (sx - nx), 1, bg);
}
/* Convert cells into a string. */

28
grid.c
View File

@ -547,7 +547,7 @@ void
grid_clear(struct grid *gd, u_int px, u_int py, u_int nx, u_int ny, u_int bg)
{
struct grid_line *gl;
u_int xx, yy;
u_int xx, yy, ox, sx;
if (nx == 0 || ny == 0)
return;
@ -564,16 +564,20 @@ grid_clear(struct grid *gd, u_int px, u_int py, u_int nx, u_int ny, u_int bg)
for (yy = py; yy < py + ny; yy++) {
gl = &gd->linedata[yy];
if (px + nx >= gd->sx && px < gl->cellused)
gl->cellused = px;
if (px > gl->cellsize && COLOUR_DEFAULT(bg))
continue;
if (px + nx >= gl->cellsize && COLOUR_DEFAULT(bg)) {
gl->cellsize = px;
continue;
sx = gd->sx;
if (sx > gl->cellsize)
sx = gl->cellsize;
ox = nx;
if (COLOUR_DEFAULT(bg)) {
if (px > sx)
continue;
if (px + nx > sx)
ox = sx - px;
}
grid_expand_line(gd, yy, px + nx, 8); /* default bg first */
for (xx = px; xx < px + nx; xx++)
grid_expand_line(gd, yy, px + ox, 8); /* default bg first */
for (xx = px; xx < px + ox; xx++)
grid_clear_cell(gd, xx, yy, bg);
}
}
@ -1216,6 +1220,10 @@ grid_reflow(struct grid *gd, u_int sx)
struct grid_cell gc;
u_int yy, width, i, at, first;
/* Do not reflow to the same size. */
if (sx == gd->sx)
return;
/*
* Create a destination grid. This is just used as a container for the
* line data and may not be fully valid.