/* Clear area. */
void
grid_clear(struct grid *gd, u_int px, u_int py, u_int nx, u_int ny)
{
u_int xx, yy;
GRID_DEBUG(gd, "px=%u, py=%u, nx=%u, ny=%u", px, py, nx, ny);
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_put_cell(gd, xx, yy, &grid_default_cell);
}
}
}
/* Move a group of lines. */
void
grid_move_lines(struct grid *gd, u_int dy, u_int py, u_int ny)
{
u_int yy;
if (ny == 0 || py == dy)
return;
if (grid_check_y(gd, py) != 0)
return;
if (grid_check_y(gd, py + ny - 1) != 0)
return;
if (grid_check_y(gd, dy) != 0)
return;
if (grid_check_y(gd, dy + ny - 1) != 0)
return;
/* Free any lines which are being replaced. */
for (yy = dy; yy < dy + ny; yy++) {
if (yy >= py && yy < py + ny)
continue;
grid_clear_lines(gd, yy, 1);
}
memmove(&gd->linedata[dy], &gd->linedata[py],
ny * (sizeof *gd->linedata));
/* Wipe any lines that have been moved (without freeing them). */
for (yy = py; yy < py + ny; yy++) {
if (yy >= dy && yy < dy + ny)
continue;
memset(&gd->linedata[yy], 0, sizeof gd->linedata[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);
}
}
/*
* Duplicate a set of lines between two grids. If there aren't enough lines in
* either source or destination, the number of lines is limited to the number
* available.
*/
void
grid_duplicate_lines(struct grid *dst, u_int dy, struct grid *src, u_int sy,
u_int ny)
{
struct grid_line *dstl, *srcl;
u_int yy;
if (dy + ny > dst->hsize + dst->sy)
ny = dst->hsize + dst->sy - dy;
if (sy + ny > src->hsize + src->sy)
ny = src->hsize + src->sy - sy;
grid_clear_lines(dst, dy, ny);
for (yy = 0; yy < ny; yy++) {
srcl = &src->linedata[sy];
dstl = &dst->linedata[dy];
memcpy(dstl, srcl, sizeof *dstl);
if (srcl->cellsize != 0) {
dstl->celldata = xcalloc(
srcl->cellsize, sizeof *dstl->celldata);
memcpy(dstl->celldata, srcl->celldata,
srcl->cellsize * sizeof *dstl->celldata);
}
sy++;
dy++;
}
}
/* 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);
}
}
/* Clear the history. */
void
grid_clear_history(struct grid *gd)
{
grid_clear_lines(gd, 0, gd->hsize);
grid_move_lines(gd, 0, gd->hsize, gd->sy);
gd->hsize = 0;
gd->linedata = xreallocarray(gd->linedata, gd->sy,
sizeof *gd->linedata);
}
/* Reinitialise screen. */
void
screen_reinit(struct screen *s)
{
s->cx = 0;
s->cy = 0;
s->rupper = 0;
s->rlower = screen_size_y(s) - 1;
s->mode = MODE_CURSOR | MODE_WRAP;
screen_reset_tabs(s);
grid_clear_lines(s->grid, s->grid->hsize, s->grid->sy);
screen_clear_selection(s);
}
