/* Set up context for TTY command. */
void
screen_write_initctx(
struct screen_write_ctx *ctx, struct tty_ctx *ttyctx, int save_last)
{
struct screen *s = ctx->s;
struct grid *gd = s->grid;
const struct grid_cell *gc;
const struct grid_utf8 *gu;
u_int xx;
ttyctx->wp = ctx->wp;
ttyctx->ocx = s->cx;
ttyctx->ocy = s->cy;
ttyctx->orlower = s->rlower;
ttyctx->orupper = s->rupper;
if (!save_last)
return;
/* Save the last cell on the screen. */
gc = &grid_default_cell;
for (xx = 1; xx <= screen_size_x(s); xx++) {
gc = grid_view_peek_cell(gd, screen_size_x(s) - xx, s->cy);
if (!(gc->flags & GRID_FLAG_PADDING))
break;
}
ttyctx->last_width = xx;
memcpy(&ttyctx->last_cell, gc, sizeof ttyctx->last_cell);
if (gc->flags & GRID_FLAG_UTF8) {
gu = grid_view_peek_utf8(gd, screen_size_x(s) - xx, s->cy);
memcpy(&ttyctx->last_utf8, gu, sizeof ttyctx->last_utf8);
}
}
/*
* UTF-8 wide characters are a bit of an annoyance. They take up more than one
* cell on the screen, so following cells must not be drawn by marking them as
* padding.
*
* So far, so good. The problem is, when overwriting a padding cell, or a UTF-8
* character, it is necessary to also overwrite any other cells which covered
* by the same character.
*/
void
screen_write_overwrite(struct screen_write_ctx *ctx, u_int width)
{
struct screen *s = ctx->s;
struct grid *gd = s->grid;
const struct grid_cell *gc;
u_int xx;
gc = grid_view_peek_cell(gd, s->cx, s->cy);
if (gc->flags & GRID_FLAG_PADDING) {
/*
* A padding cell, so clear any following and leading padding
* cells back to the character. Don't overwrite the current
* cell as that happens later anyway.
*/
xx = s->cx + 1;
while (--xx > 0) {
gc = grid_view_peek_cell(gd, xx, s->cy);
if (!(gc->flags & GRID_FLAG_PADDING))
break;
grid_view_set_cell(gd, xx, s->cy, &grid_default_cell);
}
/* Overwrite the character at the start of this padding. */
grid_view_set_cell(gd, xx, s->cy, &grid_default_cell);
}
/*
* Overwrite any padding cells that belong to a UTF-8 character
* we'll be overwriting with the current character.
*/
xx = s->cx + width - 1;
while (++xx < screen_size_x(s)) {
gc = grid_view_peek_cell(gd, xx, s->cy);
if (!(gc->flags & GRID_FLAG_PADDING))
break;
grid_view_set_cell(gd, xx, s->cy, &grid_default_cell);
}
}
void
tty_draw_line(struct tty *tty, struct screen *s, u_int py, u_int ox, u_int oy)
{
const struct grid_cell *gc;
const struct grid_utf8 *gu;
u_int i, sx;
sx = screen_size_x(s);
if (sx > s->grid->size[s->grid->hsize + py])
sx = s->grid->size[s->grid->hsize + py];
if (sx > tty->sx)
sx = tty->sx;
tty_cursor(tty, 0, py, ox, oy);
for (i = 0; i < sx; i++) {
gc = grid_view_peek_cell(s->grid, i, py);
gu = NULL;
if (gc->flags & GRID_FLAG_UTF8)
gu = grid_view_peek_utf8(s->grid, i, py);
if (screen_check_selection(s, i, py)) {
s->sel.cell.data = gc->data;
tty_cell(tty, &s->sel.cell, gu);
} else
tty_cell(tty, gc, gu);
}
if (sx >= tty->sx)
return;
tty_reset(tty);
tty_cursor(tty, sx, py, ox, oy);
if (screen_size_x(s) >= tty->sx && tty_term_has(tty->term, TTYC_EL))
tty_putcode(tty, TTYC_EL);
else {
for (i = sx; i < screen_size_x(s); i++)
tty_putc(tty, ' ');
}
}
void
tty_draw_line(struct tty *tty, struct screen *s, u_int py, u_int ox, u_int oy)
{
const struct grid_cell *gc;
struct grid_line *gl;
struct grid_cell tmpgc;
const struct grid_utf8 *gu;
u_int i, sx;
tty_update_mode(tty, tty->mode & ~MODE_CURSOR, s);
sx = screen_size_x(s);
if (sx > s->grid->linedata[s->grid->hsize + py].cellsize)
sx = s->grid->linedata[s->grid->hsize + py].cellsize;
if (sx > tty->sx)
sx = tty->sx;
/*
* Don't move the cursor to the start permission if it will wrap there
* itself.
*/
gl = NULL;
if (py != 0)
gl = &s->grid->linedata[s->grid->hsize + py - 1];
if (oy + py == 0 || gl == NULL || !(gl->flags & GRID_LINE_WRAPPED) ||
tty->cx < tty->sx || ox != 0 ||
(oy + py != tty->cy + 1 && tty->cy != s->rlower + oy))
tty_cursor(tty, ox, oy + py);
for (i = 0; i < sx; i++) {
gc = grid_view_peek_cell(s->grid, i, py);
gu = NULL;
if (gc->flags & GRID_FLAG_UTF8)
gu = grid_view_peek_utf8(s->grid, i, py);
if (screen_check_selection(s, i, py)) {
memcpy(&tmpgc, &s->sel.cell, sizeof tmpgc);
tmpgc.data = gc->data;
tmpgc.flags = gc->flags &
~(GRID_FLAG_FG256|GRID_FLAG_BG256);
tmpgc.flags |= s->sel.cell.flags &
(GRID_FLAG_FG256|GRID_FLAG_BG256);
tty_cell(tty, &tmpgc, gu);
} else
tty_cell(tty, gc, gu);
}
if (sx >= tty->sx) {
tty_update_mode(tty, tty->mode, s);
return;
}
tty_reset(tty);
tty_cursor(tty, ox + sx, oy + py);
if (screen_size_x(s) >= tty->sx && tty_term_has(tty->term, TTYC_EL))
tty_putcode(tty, TTYC_EL);
else {
for (i = sx; i < screen_size_x(s); i++)
tty_putc(tty, ' ');
}
tty_update_mode(tty, tty->mode, s);
}