/* Delete characters. */
void
grid_view_delete_cells(struct grid *gd, u_int px, u_int py, u_int nx)
{
u_int sx;
px = grid_view_x(gd, px);
py = grid_view_y(gd, py);
sx = grid_view_x(gd, gd->sx);
grid_move_cells(gd, px, px + nx, py, sx - px - nx);
grid_clear(gd, sx - nx, py, px + nx - (sx - nx), 1);
}
/* Insert characters. */
void
grid_view_insert_cells(struct grid *gd, u_int px, u_int py, u_int nx)
{
u_int sx;
px = grid_view_x(gd, px);
py = grid_view_y(gd, py);
sx = grid_view_x(gd, gd->sx);
if (px == sx - 1)
grid_clear(gd, px, py, 1, 1);
else
grid_move_cells(gd, px + nx, px, py, sx - px - nx);
}
/* Join line below onto this one. */
static void
grid_reflow_join(struct grid *target, struct grid *gd, u_int sx, u_int yy,
u_int width, int already)
{
struct grid_line *gl, *from = NULL;
struct grid_cell gc;
u_int lines, left, i, to, line, want = 0;
u_int at;
int wrapped = 1;
/*
* Add a new target line.
*/
if (!already) {
to = target->sy;
gl = grid_reflow_move(target, &gd->linedata[yy]);
} else {
to = target->sy - 1;
gl = &target->linedata[to];
}
at = gl->cellused;
/*
* Loop until no more to consume or the target line is full.
*/
lines = 0;
for (;;) {
/*
* If this is now the last line, there is nothing more to be
* done.
*/
if (yy + 1 + lines == gd->hsize + gd->sy)
break;
line = yy + 1 + lines;
/* If the next line is empty, skip it. */
if (~gd->linedata[line].flags & GRID_LINE_WRAPPED)
wrapped = 0;
if (gd->linedata[line].cellused == 0) {
if (!wrapped)
break;
lines++;
continue;
}
/*
* Is the destination line now full? Copy the first character
* separately because we need to leave "from" set to the last
* line if this line is full.
*/
grid_get_cell1(&gd->linedata[line], 0, &gc);
if (width + gc.data.width > sx)
break;
width += gc.data.width;
grid_set_cell(target, at, to, &gc);
at++;
/* Join as much more as possible onto the current line. */
from = &gd->linedata[line];
for (want = 1; want < from->cellused; want++) {
grid_get_cell1(from, want, &gc);
if (width + gc.data.width > sx)
break;
width += gc.data.width;
grid_set_cell(target, at, to, &gc);
at++;
}
lines++;
/*
* If this line wasn't wrapped or we didn't consume the entire
* line, don't try to join any further lines.
*/
if (!wrapped || want != from->cellused || width == sx)
break;
}
if (lines == 0)
return;
/*
* If we didn't consume the entire final line, then remove what we did
* consume. If we consumed the entire line and it wasn't wrapped,
* remove the wrap flag from this line.
*/
left = from->cellused - want;
if (left != 0) {
grid_move_cells(gd, 0, want, yy + lines, left, 8);
from->cellsize = from->cellused = left;
lines--;
} else if (!wrapped)
gl->flags &= ~GRID_LINE_WRAPPED;
/* Remove the lines that were completely consumed. */
for (i = yy + 1; i < yy + 1 + lines; i++) {
free(gd->linedata[i].celldata);
free(gd->linedata[i].extddata);
grid_reflow_dead(&gd->linedata[i]);
}
/* Adjust scroll position. */
if (gd->hscrolled > to + lines)
gd->hscrolled -= lines;
else if (gd->hscrolled > to)
gd->hscrolled = to;
}
/* Write cell data. */
void
screen_write_cell(struct screen_write_ctx *ctx,
const struct grid_cell *gc, const struct utf8_data *utf8data)
{
struct screen *s = ctx->s;
struct grid *gd = s->grid;
struct tty_ctx ttyctx;
struct grid_utf8 gu;
u_int width, xx;
struct grid_cell tmp_gc, *tmp_gcp;
int insert = 0;
/* Ignore padding. */
if (gc->flags & GRID_FLAG_PADDING)
return;
/* Find character width. */
if (gc->flags & GRID_FLAG_UTF8)
width = utf8data->width;
else
width = 1;
/*
* If this is a wide character and there is no room on the screen, for
* the entire character, don't print it.
*/
if (!(s->mode & MODE_WRAP)
&& (width > 1 && (width > screen_size_x(s) ||
(s->cx != screen_size_x(s)
&& s->cx > screen_size_x(s) - width))))
return;
/*
* If the width is zero, combine onto the previous character, if
* there is space.
*/
if (width == 0) {
if (screen_write_combine(ctx, utf8data) == 0) {
screen_write_initctx(ctx, &ttyctx, 0);
tty_write(tty_cmd_utf8character, &ttyctx);
}
return;
}
/* Initialise the redraw context, saving the last cell. */
screen_write_initctx(ctx, &ttyctx, 1);
/* If in insert mode, make space for the cells. */
if ((s->mode & MODE_INSERT) && s->cx <= screen_size_x(s) - width) {
xx = screen_size_x(s) - s->cx - width;
grid_move_cells(s->grid, s->cx + width, s->cx, s->cy, xx);
insert = 1;
}
/* Check this will fit on the current line and wrap if not. */
if ((s->mode & MODE_WRAP) && s->cx > screen_size_x(s) - width) {
screen_write_linefeed(ctx, 1);
s->cx = 0; /* carriage return */
}
/* Sanity checks. */
if (((s->mode & MODE_WRAP) && s->cx > screen_size_x(s) - width)
|| s->cy > screen_size_y(s) - 1)
return;
/* Handle overwriting of UTF-8 characters. */
screen_write_overwrite(ctx, width);
/*
* If the new character is UTF-8 wide, fill in padding cells. Have
* already ensured there is enough room.
*/
for (xx = s->cx + 1; xx < s->cx + width; xx++) {
tmp_gcp = grid_view_get_cell(gd, xx, s->cy);
if (tmp_gcp != NULL)
tmp_gcp->flags |= GRID_FLAG_PADDING;
}
/* Set the cell. */
grid_view_set_cell(gd, s->cx, s->cy, gc);
if (gc->flags & GRID_FLAG_UTF8) {
/* Construct UTF-8 and write it. */
grid_utf8_set(&gu, utf8data);
grid_view_set_utf8(gd, s->cx, s->cy, &gu);
}
/* Move the cursor. */
s->cx += width;
/* Draw to the screen if necessary. */
if (insert) {
ttyctx.num = width;
tty_write(tty_cmd_insertcharacter, &ttyctx);
}
ttyctx.utf8 = &gu;
if (screen_check_selection(s, s->cx - width, s->cy)) {
memcpy(&tmp_gc, &s->sel.cell, sizeof tmp_gc);
tmp_gc.data = gc->data;
tmp_gc.flags = gc->flags &
~(GRID_FLAG_FG256|GRID_FLAG_BG256);
tmp_gc.flags |= s->sel.cell.flags &
(GRID_FLAG_FG256|GRID_FLAG_BG256);
ttyctx.cell = &tmp_gc;
tty_write(tty_cmd_cell, &ttyctx);
} else {
ttyctx.cell = gc;
tty_write(tty_cmd_cell, &ttyctx);
}
}
/* Write cell data. */
void
screen_write_cell(struct screen_write_ctx *ctx, const struct grid_cell *gc)
{
struct screen *s = ctx->s;
struct grid *gd = s->grid;
struct tty_ctx ttyctx;
u_int width, xx, last;
struct grid_cell tmp_gc, now_gc;
int insert, skip, selected;
/* Ignore padding. */
if (gc->flags & GRID_FLAG_PADDING)
return;
width = gc->data.width;
/*
* If this is a wide character and there is no room on the screen, for
* the entire character, don't print it.
*/
if (!(s->mode & MODE_WRAP)
&& (width > 1 && (width > screen_size_x(s) ||
(s->cx != screen_size_x(s)
&& s->cx > screen_size_x(s) - width))))
return;
/*
* If the width is zero, combine onto the previous character, if
* there is space.
*/
if (width == 0) {
if (screen_write_combine(ctx, &gc->data) == 0) {
screen_write_initctx(ctx, &ttyctx);
tty_write(tty_cmd_utf8character, &ttyctx);
}
return;
}
/* Initialise the redraw context. */
screen_write_initctx(ctx, &ttyctx);
/* If in insert mode, make space for the cells. */
if ((s->mode & MODE_INSERT) && s->cx <= screen_size_x(s) - width) {
xx = screen_size_x(s) - s->cx - width;
grid_move_cells(s->grid, s->cx + width, s->cx, s->cy, xx);
insert = 1;
} else
insert = 0;
skip = !insert;
/* Check this will fit on the current line and wrap if not. */
if ((s->mode & MODE_WRAP) && s->cx > screen_size_x(s) - width) {
screen_write_linefeed(ctx, 1);
s->cx = 0; /* carriage return */
skip = 0;
}
/* Sanity check cursor position. */
if (s->cx > screen_size_x(s) - width || s->cy > screen_size_y(s) - 1)
return;
/* Handle overwriting of UTF-8 characters. */
grid_view_get_cell(gd, s->cx, s->cy, &now_gc);
if (screen_write_overwrite(ctx, &now_gc, width))
skip = 0;
/*
* If the new character is UTF-8 wide, fill in padding cells. Have
* already ensured there is enough room.
*/
for (xx = s->cx + 1; xx < s->cx + width; xx++) {
grid_view_set_cell(gd, xx, s->cy, &screen_write_pad_cell);
skip = 0;
}
/* If no change, do not draw. */
if (skip)
skip = (memcmp(&now_gc, gc, sizeof now_gc) == 0);
/* Update the selection the flag and set the cell. */
selected = screen_check_selection(s, s->cx, s->cy);
if (selected && ~gc->flags & GRID_FLAG_SELECTED) {
skip = 0;
memcpy(&tmp_gc, gc, sizeof tmp_gc);
tmp_gc.flags |= GRID_FLAG_SELECTED;
grid_view_set_cell(gd, s->cx, s->cy, &tmp_gc);
} else if (!selected && gc->flags & GRID_FLAG_SELECTED) {
skip = 0;
memcpy(&tmp_gc, gc, sizeof tmp_gc);
tmp_gc.flags &= ~GRID_FLAG_SELECTED;
grid_view_set_cell(gd, s->cx, s->cy, &tmp_gc);
} else if (!skip)
grid_view_set_cell(gd, s->cx, s->cy, gc);
/*
* Move the cursor. If not wrapping, stick at the last character and
* replace it.
*/
last = !(s->mode & MODE_WRAP);
if (s->cx <= screen_size_x(s) - last - width)
s->cx += width;
else
s->cx = screen_size_x(s) - last;
/* Create space for character in insert mode. */
if (insert) {
ttyctx.num = width;
tty_write(tty_cmd_insertcharacter, &ttyctx);
}
/* Save last cell if it will be needed. */
if (!skip && ctx->wp != NULL && ttyctx.ocx > ctx->wp->sx - width)
screen_write_save_last(ctx, &ttyctx);
/* Write to the screen. */
if (selected) {
memcpy(&tmp_gc, &s->sel.cell, sizeof tmp_gc);
utf8_copy(&tmp_gc.data, &gc->data);
tmp_gc.attr = tmp_gc.attr & ~GRID_ATTR_CHARSET;
tmp_gc.attr |= gc->attr & GRID_ATTR_CHARSET;
tmp_gc.flags = gc->flags;
tmp_gc.flags &= ~(GRID_FLAG_FGRGB|GRID_FLAG_BGRGB);
tmp_gc.flags &= ~(GRID_FLAG_FG256|GRID_FLAG_BG256);
tmp_gc.flags |= s->sel.cell.flags &
(GRID_FLAG_FG256|GRID_FLAG_BG256);
ttyctx.cell = &tmp_gc;
tty_write(tty_cmd_cell, &ttyctx);
} else if (!skip) {
ttyctx.cell = gc;
tty_write(tty_cmd_cell, &ttyctx);
}
}
/* Write cell data. */
void
screen_write_cell(struct screen_write_ctx *ctx, const struct grid_cell *gc)
{
struct screen *s = ctx->s;
struct grid *gd = s->grid;
struct tty_ctx ttyctx;
u_int width, xx, last;
u_int sx = screen_size_x(s), sy = screen_size_y(s);
struct grid_line *gl;
struct grid_cell tmp_gc, now_gc;
struct grid_cell_entry *gce;
int insert, skip, selected, wrapped = 0;
ctx->cells++;
/* Ignore padding. */
if (gc->flags & GRID_FLAG_PADDING)
return;
width = gc->data.width;
/*
* If this is a wide character and there is no room on the screen, for
* the entire character, don't print it.
*/
if (!(s->mode & MODE_WRAP) && (width > 1 &&
(width > sx || (s->cx != sx && s->cx > sx - width))))
return;
/*
* If the width is zero, combine onto the previous character, if
* there is space.
*/
if (width == 0) {
if (screen_write_combine(ctx, &gc->data) == 0) {
screen_write_initctx(ctx, &ttyctx);
tty_write(tty_cmd_utf8character, &ttyctx);
}
return;
}
/* Initialise the redraw context. */
screen_write_initctx(ctx, &ttyctx);
/* If in insert mode, make space for the cells. */
if ((s->mode & MODE_INSERT) && s->cx <= sx - width) {
xx = sx - s->cx - width;
grid_move_cells(s->grid, s->cx + width, s->cx, s->cy, xx);
insert = 1;
} else
insert = 0;
skip = !insert;
/* Check this will fit on the current line and wrap if not. */
if ((s->mode & MODE_WRAP) && s->cx > sx - width) {
screen_write_flush(ctx);
screen_write_save_last(ctx, &ttyctx);
screen_write_linefeed(ctx, 1);
s->cx = 0; /* carriage return */
skip = 0;
wrapped = 1;
}
/* Sanity check cursor position. */
if (s->cx > sx - width || s->cy > sy - 1)
return;
/* Handle overwriting of UTF-8 characters. */
gl = &s->grid->linedata[s->grid->hsize + s->cy];
if (gl->flags & GRID_LINE_EXTENDED) {
grid_view_get_cell(gd, s->cx, s->cy, &now_gc);
if (screen_write_overwrite(ctx, &now_gc, width))
skip = 0;
}
/*
* If the new character is UTF-8 wide, fill in padding cells. Have
* already ensured there is enough room.
*/
for (xx = s->cx + 1; xx < s->cx + width; xx++) {
grid_view_set_cell(gd, xx, s->cy, &screen_write_pad_cell);
skip = 0;
}
/* If no change, do not draw. */
if (skip) {
if (s->cx >= gl->cellsize)
skip = grid_cells_equal(gc, &grid_default_cell);
else {
gce = &gl->celldata[s->cx];
if (gce->flags & GRID_FLAG_EXTENDED)
skip = 0;
else if (gc->flags != (gce->flags & ~GRID_FLAG_EXTENDED))
skip = 0;
else if (gc->attr != gce->data.attr)
skip = 0;
else if (gc->fg != gce->data.fg)
skip = 0;
else if (gc->bg != gce->data.bg)
skip = 0;
else if (gc->data.width != 1 || gce->data.data != gc->data.data[0])
skip = 0;
}
}
/* Update the selection the flag and set the cell. */
selected = screen_check_selection(s, s->cx, s->cy);
if (selected && ~gc->flags & GRID_FLAG_SELECTED) {
skip = 0;
memcpy(&tmp_gc, gc, sizeof tmp_gc);
tmp_gc.flags |= GRID_FLAG_SELECTED;
grid_view_set_cell(gd, s->cx, s->cy, &tmp_gc);
} else if (!selected && gc->flags & GRID_FLAG_SELECTED) {
skip = 0;
memcpy(&tmp_gc, gc, sizeof tmp_gc);
tmp_gc.flags &= ~GRID_FLAG_SELECTED;
grid_view_set_cell(gd, s->cx, s->cy, &tmp_gc);
} else if (!skip)
grid_view_set_cell(gd, s->cx, s->cy, gc);
/*
* Move the cursor. If not wrapping, stick at the last character and
* replace it.
*/
last = !(s->mode & MODE_WRAP);
if (s->cx <= sx - last - width)
s->cx += width;
else
s->cx = sx - last;
/* Create space for character in insert mode. */
if (insert) {
if (!wrapped)
screen_write_flush(ctx);
ttyctx.num = width;
tty_write(tty_cmd_insertcharacter, &ttyctx);
}
/* Write to the screen. */
if (selected) {
memcpy(&tmp_gc, &s->sel.cell, sizeof tmp_gc);
utf8_copy(&tmp_gc.data, &gc->data);
tmp_gc.attr = tmp_gc.attr & ~GRID_ATTR_CHARSET;
tmp_gc.attr |= gc->attr & GRID_ATTR_CHARSET;
tmp_gc.flags = gc->flags;
screen_write_flush(ctx);
ttyctx.cell = &tmp_gc;
tty_write(tty_cmd_cell, &ttyctx);
ctx->written++;
} else if (!skip) {
if (wrapped) {
ttyctx.cell = gc;
tty_write(tty_cmd_cell, &ttyctx);
ctx->written++;
} else {
/*
* If wp is NULL, we are not updating the terminal and
* don't care about actually writing the cells
* (tty_write will just return). So don't even bother
* allocating the dirty array.
*/
if (ctx->wp != NULL && s->dirty == NULL) {
log_debug("%s: allocating %u bits", __func__,
s->dirtysize);
s->dirty = bit_alloc(s->dirtysize);
}
if (s->dirty != NULL) {
bit_set(s->dirty, screen_dirty_bit(s,
ttyctx.ocx, ttyctx.ocy));
ctx->dirty++;
}
}
} else
ctx->skipped++;
}
/* Write cell data. */
void
screen_write_cell(struct screen_write_ctx *ctx, const struct grid_cell *gc)
{
struct screen *s = ctx->s;
struct grid *gd = s->grid;
struct tty_ctx ttyctx;
u_int width, xx, last;
struct grid_cell tmp_gc;
int insert;
/* Ignore padding. */
if (gc->flags & GRID_FLAG_PADDING)
return;
width = gc->data.width;
/*
* If this is a wide character and there is no room on the screen, for
* the entire character, don't print it.
*/
if (!(s->mode & MODE_WRAP)
&& (width > 1 && (width > screen_size_x(s) ||
(s->cx != screen_size_x(s)
&& s->cx > screen_size_x(s) - width))))
return;
/*
* If the width is zero, combine onto the previous character, if
* there is space.
*/
if (width == 0) {
if (screen_write_combine(ctx, &gc->data) == 0) {
screen_write_initctx(ctx, &ttyctx, 0);
tty_write(tty_cmd_utf8character, &ttyctx);
}
return;
}
/* Initialise the redraw context, saving the last cell. */
screen_write_initctx(ctx, &ttyctx, 1);
/* If in insert mode, make space for the cells. */
if ((s->mode & MODE_INSERT) && s->cx <= screen_size_x(s) - width) {
xx = screen_size_x(s) - s->cx - width;
grid_move_cells(s->grid, s->cx + width, s->cx, s->cy, xx);
insert = 1;
} else
insert = 0;
/* Check this will fit on the current line and wrap if not. */
if ((s->mode & MODE_WRAP) && s->cx > screen_size_x(s) - width) {
screen_write_linefeed(ctx, 1);
s->cx = 0; /* carriage return */
}
/* Sanity check cursor position. */
if (s->cx > screen_size_x(s) - width || s->cy > screen_size_y(s) - 1)
return;
/* Handle overwriting of UTF-8 characters. */
screen_write_overwrite(ctx, width);
/*
* If the new character is UTF-8 wide, fill in padding cells. Have
* already ensured there is enough room.
*/
memcpy(&tmp_gc, &grid_default_cell, sizeof tmp_gc);
tmp_gc.flags |= GRID_FLAG_PADDING;
tmp_gc.data.width = 0;
for (xx = s->cx + 1; xx < s->cx + width; xx++)
grid_view_set_cell(gd, xx, s->cy, &tmp_gc);
/* Set the cell. */
grid_view_set_cell(gd, s->cx, s->cy, gc);
/*
* Move the cursor. If not wrapping, stick at the last character and
* replace it.
*/
last = !(s->mode & MODE_WRAP);
if (s->cx <= screen_size_x(s) - last - width)
s->cx += width;
else
s->cx = screen_size_x(s) - last;
/* Draw to the screen if necessary. */
if (insert) {
ttyctx.num = width;
tty_write(tty_cmd_insertcharacter, &ttyctx);
}
if (screen_check_selection(s, s->cx - width, s->cy)) {
memcpy(&tmp_gc, &s->sel.cell, sizeof tmp_gc);
utf8_copy(&tmp_gc.data, &gc->data);
tmp_gc.attr = tmp_gc.attr & ~GRID_ATTR_CHARSET;
tmp_gc.attr |= gc->attr & GRID_ATTR_CHARSET;
tmp_gc.flags = gc->flags & ~(GRID_FLAG_FG256|GRID_FLAG_BG256);
tmp_gc.flags |= s->sel.cell.flags &
(GRID_FLAG_FG256|GRID_FLAG_BG256);
ttyctx.cell = &tmp_gc;
tty_write(tty_cmd_cell, &ttyctx);
} else {
ttyctx.cell = gc;
tty_write(tty_cmd_cell, &ttyctx);
}
}
