/* Clear to end of screen from cursor. */
void
screen_write_clearendofscreen(struct screen_write_ctx *ctx, u_int bg)
{
struct screen *s = ctx->s;
struct tty_ctx ttyctx;
u_int sx = screen_size_x(s), sy = screen_size_y(s);
screen_write_initctx(ctx, &ttyctx);
ttyctx.bg = bg;
/* Scroll into history if it is enabled and clearing entire screen. */
if (s->cx == 0 && s->cy == 0 && s->grid->flags & GRID_HISTORY) {
screen_dirty_clear(s, 0, 0, sx - 1, sy - 1);
grid_view_clear_history(s->grid, bg);
} else {
if (s->cx <= sx - 1) {
screen_dirty_clear(s, s->cx, s->cy, sx - 1, s->cy);
grid_view_clear(s->grid, s->cx, s->cy, sx - s->cx, 1,
bg);
}
screen_dirty_clear(s, 0, s->cy + 1, sx - 1, sy - 1);
grid_view_clear(s->grid, 0, s->cy + 1, sx, sy - (s->cy + 1),
bg);
}
tty_write(tty_cmd_clearendofscreen, &ttyctx);
}
/* Clear into history. */
void
grid_view_clear_history(struct grid *gd, u_int bg)
{
struct grid_line *gl;
u_int yy, last;
/* Find the last used line. */
last = 0;
for (yy = 0; yy < gd->sy; yy++) {
gl = &gd->linedata[grid_view_y(gd, yy)];
if (gl->cellused != 0)
last = yy + 1;
}
if (last == 0) {
grid_view_clear(gd, 0, 0, gd->sx, gd->sy, bg);
return;
}
/* Scroll the lines into the history. */
for (yy = 0; yy < last; yy++) {
grid_collect_history(gd, bg);
grid_scroll_history(gd, bg);
}
if (last < gd->sy)
grid_view_clear(gd, 0, 0, gd->sx, gd->sy - last, bg);
gd->hscrolled = 0;
}
/* Clear nx characters. */
void
screen_write_clearcharacter(struct screen_write_ctx *ctx, u_int nx)
{
struct screen *s = ctx->s;
struct tty_ctx ttyctx;
if (nx == 0)
nx = 1;
if (nx > screen_size_x(s) - s->cx)
nx = screen_size_x(s) - s->cx;
if (nx == 0)
return;
screen_write_initctx(ctx, &ttyctx);
if (s->cx <= screen_size_x(s) - 1) {
screen_dirty_clear(s, s->cx, s->cy, s->cx + nx - 1, s->cy);
grid_view_clear(s->grid, s->cx, s->cy, nx, 1, 8);
} else
return;
ttyctx.num = nx;
tty_write(tty_cmd_clearcharacter, &ttyctx);
}
/* Clear to start of line from cursor. */
void
screen_write_clearstartofline(struct screen_write_ctx *ctx)
{
struct screen *s = ctx->s;
struct tty_ctx ttyctx;
u_int sx;
screen_write_initctx(ctx, &ttyctx, 0);
sx = screen_size_x(s);
if (s->cx > sx - 1)
grid_view_clear(s->grid, 0, s->cy, sx, 1);
else
grid_view_clear(s->grid, 0, s->cy, s->cx + 1, 1);
tty_write(tty_cmd_clearstartofline, &ttyctx);
}
/* Clear to start of line from cursor. */
void
screen_write_clearstartofline(struct screen_write_ctx *ctx, u_int bg)
{
struct screen *s = ctx->s;
struct tty_ctx ttyctx;
u_int sx = screen_size_x(s);
screen_write_initctx(ctx, &ttyctx);
ttyctx.bg = bg;
if (s->cx > sx - 1) {
screen_dirty_clear(s, 0, s->cy, sx - 1, s->cy);
grid_view_clear(s->grid, 0, s->cy, sx, 1, bg);
} else {
screen_dirty_clear(s, 0, s->cy, s->cx, s->cy);
grid_view_clear(s->grid, 0, s->cy, s->cx + 1, 1, bg);
}
tty_write(tty_cmd_clearstartofline, &ttyctx);
}
/* Clear line at cursor. */
void
screen_write_clearline(struct screen_write_ctx *ctx)
{
struct screen *s = ctx->s;
struct tty_ctx ttyctx;
screen_write_initctx(ctx, &ttyctx, 0);
grid_view_clear(s->grid, 0, s->cy, screen_size_x(s), 1);
tty_write(tty_cmd_clearline, &ttyctx);
}
/* Clear to start of screen. */
void
screen_write_clearstartofscreen(struct screen_write_ctx *ctx)
{
struct screen *s = ctx->s;
struct tty_ctx ttyctx;
u_int sx = screen_size_x(s);
screen_write_initctx(ctx, &ttyctx);
if (s->cy > 0) {
screen_dirty_clear(s, 0, 0, sx - 1, s->cy);
grid_view_clear(s->grid, 0, 0, sx, s->cy, 8);
}
if (s->cx > sx - 1) {
screen_dirty_clear(s, 0, s->cy, sx - 1, s->cy);
grid_view_clear(s->grid, 0, s->cy, sx, 1, 8);
} else {
screen_dirty_clear(s, 0, s->cy, s->cx, s->cy);
grid_view_clear(s->grid, 0, s->cy, s->cx + 1, 1, 8);
}
tty_write(tty_cmd_clearstartofscreen, &ttyctx);
}
/* Clear to end of screen from cursor. */
void
screen_write_clearendofscreen(struct screen_write_ctx *ctx)
{
struct screen *s = ctx->s;
struct tty_ctx ttyctx;
u_int sx, sy;
screen_write_initctx(ctx, &ttyctx, 0);
sx = screen_size_x(s);
sy = screen_size_y(s);
/* Scroll into history if it is enabled and clearing entire screen. */
if (s->cy == 0 && s->grid->flags & GRID_HISTORY)
grid_view_clear_history(s->grid);
else {
if (s->cx <= sx - 1)
grid_view_clear(s->grid, s->cx, s->cy, sx - s->cx, 1);
grid_view_clear(s->grid, 0, s->cy + 1, sx, sy - (s->cy + 1));
}
tty_write(tty_cmd_clearendofscreen, &ttyctx);
}
/* Clear to end of line from cursor. */
void
screen_write_clearendofline(struct screen_write_ctx *ctx)
{
struct screen *s = ctx->s;
struct tty_ctx ttyctx;
u_int sx;
screen_write_initctx(ctx, &ttyctx);
sx = screen_size_x(s);
if (s->cx <= sx - 1)
grid_view_clear(s->grid, s->cx, s->cy, sx - s->cx, 1);
tty_write(tty_cmd_clearendofline, &ttyctx);
}
/* Clear entire screen. */
void
screen_write_clearscreen(struct screen_write_ctx *ctx)
{
struct screen *s = ctx->s;
struct tty_ctx ttyctx;
screen_write_initctx(ctx, &ttyctx, 0);
/* Scroll into history if it is enabled. */
if (s->grid->flags & GRID_HISTORY)
grid_view_clear_history(s->grid);
else {
grid_view_clear(
s->grid, 0, 0, screen_size_x(s), screen_size_y(s));
}
tty_write(tty_cmd_clearscreen, &ttyctx);
}
/* Clear entire screen. */
void
screen_write_clearscreen(struct screen_write_ctx *ctx)
{
struct screen *s = ctx->s;
struct tty_ctx ttyctx;
u_int sx = screen_size_x(s), sy = screen_size_y(s);
screen_write_initctx(ctx, &ttyctx);
screen_dirty_clear(s, 0, 0, sx - 1, sy - 1);
/* Scroll into history if it is enabled. */
if (s->grid->flags & GRID_HISTORY)
grid_view_clear_history(s->grid);
else
grid_view_clear(s->grid, 0, 0, sx, sy);
tty_write(tty_cmd_clearscreen, &ttyctx);
}
/* Clear to end of line from cursor. */
void
screen_write_clearendofline(struct screen_write_ctx *ctx)
{
struct screen *s = ctx->s;
struct grid_line *gl;
struct tty_ctx ttyctx;
u_int sx = screen_size_x(s);
screen_write_initctx(ctx, &ttyctx);
gl = &s->grid->linedata[s->grid->hsize + s->cy];
if (s->cx <= sx - 1 && s->cx < gl->cellsize) {
screen_dirty_clear(s, s->cx, s->cy, sx - 1, s->cy);
grid_view_clear(s->grid, s->cx, s->cy, sx - s->cx, 1);
} else
return;
tty_write(tty_cmd_clearendofline, &ttyctx);
}
/* Clear to end of line from cursor. */
void
screen_write_clearendofline(struct screen_write_ctx *ctx, u_int bg)
{
struct screen *s = ctx->s;
struct grid_line *gl;
struct tty_ctx ttyctx;
u_int sx = screen_size_x(s);
screen_write_initctx(ctx, &ttyctx);
ttyctx.bg = bg;
gl = &s->grid->linedata[s->grid->hsize + s->cy];
if (s->cx > sx - 1 || (s->cx >= gl->cellsize && bg == 8))
return;
screen_dirty_clear(s, s->cx, s->cy, sx - 1, s->cy);
grid_view_clear(s->grid, s->cx, s->cy, sx - s->cx, 1, bg);
tty_write(tty_cmd_clearendofline, &ttyctx);
}
