/* Move a group of cells. */
void
grid_move_cells(struct grid *gd, u_int dx, u_int px, u_int py, u_int nx)
{
struct grid_line *gl;
u_int xx;
if (nx == 0 || px == dx)
return;
if (grid_check_y(gd, py) != 0)
return;
gl = &gd->linedata[py];
grid_expand_line(gd, py, px + nx);
grid_expand_line(gd, py, dx + nx);
memmove(&gl->celldata[dx], &gl->celldata[px],
nx * sizeof *gl->celldata);
/* Wipe any cells that have been moved. */
for (xx = px; xx < px + nx; xx++) {
if (xx >= dx && xx < dx + nx)
continue;
grid_clear_cell(gd, xx, py);
}
}
/* Clear area. */
void
grid_clear(struct grid *gd, u_int px, u_int py, u_int nx, u_int ny)
{
u_int xx, yy;
if (nx == 0 || ny == 0)
return;
if (px == 0 && nx == gd->sx) {
grid_clear_lines(gd, py, ny);
return;
}
if (grid_check_y(gd, py) != 0)
return;
if (grid_check_y(gd, py + ny - 1) != 0)
return;
for (yy = py; yy < py + ny; yy++) {
if (px >= gd->linedata[yy].cellsize)
continue;
if (px + nx >= gd->linedata[yy].cellsize) {
gd->linedata[yy].cellsize = px;
continue;
}
for (xx = px; xx < px + nx; xx++) {
if (xx >= gd->linedata[yy].cellsize)
break;
grid_clear_cell(gd, xx, yy);
}
}
}
/* Clear area. */
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;
if (nx == 0 || ny == 0)
return;
if (px == 0 && nx == gd->sx) {
grid_clear_lines(gd, py, ny, bg);
return;
}
if (grid_check_y(gd, __func__, py) != 0)
return;
if (grid_check_y(gd, __func__, py + ny - 1) != 0)
return;
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;
}
grid_expand_line(gd, yy, px + nx, 8); /* default bg first */
for (xx = px; xx < px + nx; xx++)
grid_clear_cell(gd, xx, yy, bg);
}
}
/* Clear area. */
void
grid_clear(struct grid *gd, u_int px, u_int py, u_int nx, u_int ny, u_int bg)
{
u_int xx, yy;
if (nx == 0 || ny == 0)
return;
if (px == 0 && nx == gd->sx) {
grid_clear_lines(gd, py, ny, bg);
return;
}
if (grid_check_y(gd, py) != 0)
return;
if (grid_check_y(gd, py + ny - 1) != 0)
return;
for (yy = py; yy < py + ny; yy++) {
if (px + nx >= gd->sx && px < gd->linedata[yy].cellused)
gd->linedata[yy].cellused = px;
if (px > gd->linedata[yy].cellsize && bg == 8)
continue;
if (px + nx >= gd->linedata[yy].cellsize && bg == 8) {
gd->linedata[yy].cellsize = px;
continue;
}
grid_expand_line(gd, yy, px + nx, bg);
for (xx = px; xx < px + nx; xx++)
grid_clear_cell(gd, xx, yy, bg);
}
}
/* Expand line to fit to cell. */
void
grid_expand_line(struct grid *gd, u_int py, u_int sx)
{
struct grid_line *gl;
u_int xx;
gl = &gd->linedata[py];
if (sx <= gl->cellsize)
return;
gl->celldata = xreallocarray(gl->celldata, sx, sizeof *gl->celldata);
for (xx = gl->cellsize; xx < sx; xx++)
grid_clear_cell(gd, xx, py);
gl->cellsize = sx;
}
/* Expand line to fit to cell. */
static void
grid_expand_line(struct grid *gd, u_int py, u_int sx, u_int bg)
{
struct grid_line *gl;
u_int xx;
gl = &gd->linedata[py];
if (sx <= gl->cellsize)
return;
if (sx < gd->sx / 4)
sx = gd->sx / 4;
else if (sx < gd->sx / 2)
sx = gd->sx / 2;
else
sx = gd->sx;
gl->celldata = xreallocarray(gl->celldata, sx, sizeof *gl->celldata);
for (xx = gl->cellsize; xx < sx; xx++)
grid_clear_cell(gd, xx, py, bg);
gl->cellsize = sx;
}
