/* Get cell for reading. */
const struct grid_cell *
grid_peek_cell(struct grid *gd, u_int px, u_int py)
{
if (grid_check_y(gd, py) != 0)
return (&grid_default_cell);
if (px >= gd->linedata[py].cellsize)
return (&grid_default_cell);
return (&gd->linedata[py].celldata[px]);
}
/* Get cell for reading. */
void
grid_get_cell(struct grid *gd, u_int px, u_int py, struct grid_cell *gc)
{
if (grid_check_y(gd, __func__, py) != 0 ||
px >= gd->linedata[py].cellsize) {
memcpy(gc, &grid_default_cell, sizeof *gc);
return;
}
return (grid_get_cell1(&gd->linedata[py], px, gc));
}
/* Set cell at relative position. */
void
grid_set_cell(
struct grid *gd, u_int px, u_int py, const struct grid_cell *gc)
{
if (grid_check_y(gd, py) != 0)
return;
grid_expand_line(gd, py, px + 1);
grid_put_cell(gd, px, py, gc);
}
/* Clear lines. This just frees and truncates the lines. */
void
grid_clear_lines(struct grid *gd, u_int py, u_int ny)
{
struct grid_line *gl;
u_int yy;
if (ny == 0)
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++) {
gl = &gd->linedata[yy];
free(gl->celldata);
memset(gl, 0, sizeof *gl);
}
}
/* Clear lines. This just frees and truncates the lines. */
void
grid_clear_lines(struct grid *gd, u_int py, u_int ny, u_int bg)
{
struct grid_line *gl;
u_int yy;
if (ny == 0)
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++) {
gl = &gd->linedata[yy];
free(gl->celldata);
free(gl->extddata);
grid_empty_line(gd, yy, bg);
}
}
/* Set cell at relative position. */
void
grid_set_cell(struct grid *gd, u_int px, u_int py, const struct grid_cell *gc)
{
struct grid_line *gl;
struct grid_cell_entry *gce;
struct grid_cell *gcp;
int extended;
if (grid_check_y(gd, py) != 0)
return;
grid_expand_line(gd, py, px + 1, 8);
gl = &gd->linedata[py];
gce = &gl->celldata[px];
if (px + 1 > gl->cellused)
gl->cellused = px + 1;
extended = (gce->flags & GRID_FLAG_EXTENDED);
if (!extended && (gc->data.size != 1 || gc->data.width != 1))
extended = 1;
if (!extended && ((gc->fg & COLOUR_FLAG_RGB) ||
(gc->bg & COLOUR_FLAG_RGB)))
extended = 1;
if (extended) {
gl->flags |= GRID_LINE_EXTENDED;
if (~gce->flags & GRID_FLAG_EXTENDED) {
gl->extddata = xreallocarray(gl->extddata,
gl->extdsize + 1, sizeof *gl->extddata);
gce->offset = gl->extdsize++;
gce->flags = gc->flags | GRID_FLAG_EXTENDED;
}
if (gce->offset >= gl->extdsize)
fatalx("offset too big");
gcp = &gl->extddata[gce->offset];
memcpy(gcp, gc, sizeof *gcp);
return;
}
gce->flags = gc->flags;
gce->data.attr = gc->attr;
gce->data.fg = gc->fg & 0xff;
if (gc->fg & COLOUR_FLAG_256)
gce->flags |= GRID_FLAG_FG256;
gce->data.bg = gc->bg & 0xff;
if (gc->bg & COLOUR_FLAG_256)
gce->flags |= GRID_FLAG_BG256;
gce->data.data = gc->data.data[0];
}
/* Move a group of lines. */
void
grid_move_lines(struct grid *gd, u_int dy, u_int py, u_int ny)
{
u_int yy;
GRID_DEBUG(gd, "dy=%u, py=%u, ny=%u", dy, py, ny);
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]);
}
}
/* Move a group of lines. */
void
grid_move_lines(struct grid *gd, u_int dy, u_int py, u_int ny, u_int bg)
{
u_int yy;
if (ny == 0 || py == dy)
return;
if (grid_check_y(gd, __func__, py) != 0)
return;
if (grid_check_y(gd, __func__, py + ny - 1) != 0)
return;
if (grid_check_y(gd, __func__, dy) != 0)
return;
if (grid_check_y(gd, __func__, 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_free_line(gd, yy);
}
memmove(&gd->linedata[dy], &gd->linedata[py],
ny * (sizeof *gd->linedata));
/*
* Wipe any lines that have been moved (without freeing them - they are
* still present).
*/
for (yy = py; yy < py + ny; yy++) {
if (yy < dy || yy >= dy + ny)
grid_empty_line(gd, yy, bg);
}
}
/* Set cell at relative position. */
void
grid_set_cell(struct grid *gd, u_int px, u_int py, const struct grid_cell *gc)
{
struct grid_line *gl;
struct grid_cell_entry *gce;
if (grid_check_y(gd, __func__, py) != 0)
return;
grid_expand_line(gd, py, px + 1, 8);
gl = &gd->linedata[py];
if (px + 1 > gl->cellused)
gl->cellused = px + 1;
gce = &gl->celldata[px];
if (grid_need_extended_cell(gce, gc))
grid_extended_cell(gl, gce, gc);
else
grid_store_cell(gce, gc, gc->data.data[0]);
}
