tmux/screen-write.c

1840 lines
42 KiB
C

/* $OpenBSD$ */
/*
* Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
* IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <stdlib.h>
#include <string.h>
#include "tmux.h"
static void screen_write_collect_clear(struct screen_write_ctx *, u_int,
u_int);
static int screen_write_collect_clear_end(struct screen_write_ctx *, u_int,
u_int, u_int);
static int screen_write_collect_clear_start(struct screen_write_ctx *, u_int,
u_int, u_int);
static void screen_write_collect_scroll(struct screen_write_ctx *);
static void screen_write_collect_flush(struct screen_write_ctx *, int,
const char *);
static int screen_write_overwrite(struct screen_write_ctx *,
struct grid_cell *, u_int);
static const struct grid_cell *screen_write_combine(struct screen_write_ctx *,
const struct utf8_data *, u_int *);
static const struct grid_cell screen_write_pad_cell = {
{ { 0 }, 0, 0, 0 }, 0, GRID_FLAG_PADDING, 0, 8, 8
};
struct screen_write_collect_item {
u_int x;
int wrapped;
enum { TEXT, CLEAR_END, CLEAR_START } type;
u_int used;
u_int bg;
struct grid_cell gc;
TAILQ_ENTRY(screen_write_collect_item) entry;
};
struct screen_write_collect_line {
u_int bg;
char *data;
TAILQ_HEAD(, screen_write_collect_item) items;
};
static void
screen_write_offset_timer(__unused int fd, __unused short events, void *data)
{
struct window *w = data;
tty_update_window_offset(w);
}
/* Set cursor position. */
static void
screen_write_set_cursor(struct screen_write_ctx *ctx, int cx, int cy)
{
struct window_pane *wp = ctx->wp;
struct window *w;
struct screen *s = ctx->s;
struct timeval tv = { .tv_usec = 10000 };
if (cx != -1 && (u_int)cx == s->cx && cy != -1 && (u_int)cy == s->cy)
return;
if (cx != -1) {
if ((u_int)cx > screen_size_x(s)) /* allow last column */
cx = screen_size_x(s) - 1;
s->cx = cx;
}
if (cy != -1) {
if ((u_int)cy > screen_size_y(s) - 1)
cy = screen_size_y(s) - 1;
s->cy = cy;
}
if (wp == NULL)
return;
w = wp->window;
if (!event_initialized(&w->offset_timer))
evtimer_set(&w->offset_timer, screen_write_offset_timer, w);
if (!evtimer_pending(&w->offset_timer, NULL))
evtimer_add(&w->offset_timer, &tv);
}
/* Set up context for TTY command. */
static void
screen_write_initctx(struct screen_write_ctx *ctx, struct tty_ctx *ttyctx,
int sync)
{
struct screen *s = ctx->s;
memset(ttyctx, 0, sizeof *ttyctx);
ttyctx->wp = ctx->wp;
ttyctx->ocx = s->cx;
ttyctx->ocy = s->cy;
ttyctx->orlower = s->rlower;
ttyctx->orupper = s->rupper;
if (sync && !ctx->sync && ttyctx->wp != NULL) {
log_debug("%s: starting sync", __func__);
tty_write(tty_cmd_syncstart, ttyctx);
ctx->sync = 1;
}
}
/* Make write list. */
void
screen_write_make_list(struct screen *s)
{
u_int y;
s->write_list = xcalloc(screen_size_y(s), sizeof *s->write_list);
for (y = 0; y < screen_size_y(s); y++)
TAILQ_INIT(&s->write_list[y].items);
}
/* Free write list. */
void
screen_write_free_list(struct screen *s)
{
u_int y;
for (y = 0; y < screen_size_y(s); y++)
free(s->write_list[y].data);
free(s->write_list);
}
/* Initialize writing with a window. */
void
screen_write_start(struct screen_write_ctx *ctx, struct window_pane *wp,
struct screen *s)
{
memset(ctx, 0, sizeof *ctx);
ctx->wp = wp;
if (wp != NULL && s == NULL)
ctx->s = wp->screen;
else
ctx->s = s;
if (ctx->s->write_list == NULL)
screen_write_make_list(ctx->s);
ctx->item = xcalloc(1, sizeof *ctx->item);
ctx->scrolled = 0;
ctx->bg = 8;
if (log_get_level() != 0) {
if (wp != NULL) {
log_debug("%s: size %ux%u, pane %%%u (at %u,%u)",
__func__, screen_size_x(ctx->s),
screen_size_y(ctx->s), wp->id, wp->xoff, wp->yoff);
} else {
log_debug("%s: size %ux%u, no pane",
__func__, screen_size_x(ctx->s),
screen_size_y(ctx->s));
}
}
}
/* Finish writing. */
void
screen_write_stop(struct screen_write_ctx *ctx)
{
struct tty_ctx ttyctx;
screen_write_collect_end(ctx);
screen_write_collect_flush(ctx, 0, __func__);
log_debug("%s: %u cells (%u written, %u skipped)", __func__,
ctx->cells, ctx->written, ctx->skipped);
if (ctx->wp != NULL) {
ctx->wp->written += ctx->written;
ctx->wp->skipped += ctx->skipped;
}
if (ctx->sync) {
screen_write_initctx(ctx, &ttyctx, 0);
tty_write(tty_cmd_syncend, &ttyctx);
log_debug("%s: ending sync", __func__);
}
free(ctx->item);
}
/* Reset screen state. */
void
screen_write_reset(struct screen_write_ctx *ctx)
{
struct screen *s = ctx->s;
screen_reset_tabs(s);
screen_write_scrollregion(ctx, 0, screen_size_y(s) - 1);
s->mode = MODE_CURSOR | MODE_WRAP;
screen_write_clearscreen(ctx, 8);
screen_write_set_cursor(ctx, 0, 0);
}
/* Write character. */
void
screen_write_putc(struct screen_write_ctx *ctx, const struct grid_cell *gcp,
u_char ch)
{
struct grid_cell gc;
memcpy(&gc, gcp, sizeof gc);
utf8_set(&gc.data, ch);
screen_write_cell(ctx, &gc);
}
/* Calculate string length. */
size_t
screen_write_strlen(const char *fmt, ...)
{
va_list ap;
char *msg;
struct utf8_data ud;
u_char *ptr;
size_t left, size = 0;
enum utf8_state more;
va_start(ap, fmt);
xvasprintf(&msg, fmt, ap);
va_end(ap);
ptr = msg;
while (*ptr != '\0') {
if (*ptr > 0x7f && utf8_open(&ud, *ptr) == UTF8_MORE) {
ptr++;
left = strlen(ptr);
if (left < (size_t)ud.size - 1)
break;
while ((more = utf8_append(&ud, *ptr)) == UTF8_MORE)
ptr++;
ptr++;
if (more == UTF8_DONE)
size += ud.width;
} else {
if (*ptr > 0x1f && *ptr < 0x7f)
size++;
ptr++;
}
}
free(msg);
return (size);
}
/* Write simple string (no UTF-8 or maximum length). */
void
screen_write_puts(struct screen_write_ctx *ctx, const struct grid_cell *gcp,
const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
screen_write_vnputs(ctx, -1, gcp, fmt, ap);
va_end(ap);
}
/* Write string with length limit (-1 for unlimited). */
void
screen_write_nputs(struct screen_write_ctx *ctx, ssize_t maxlen,
const struct grid_cell *gcp, const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
screen_write_vnputs(ctx, maxlen, gcp, fmt, ap);
va_end(ap);
}
void
screen_write_vnputs(struct screen_write_ctx *ctx, ssize_t maxlen,
const struct grid_cell *gcp, const char *fmt, va_list ap)
{
struct grid_cell gc;
struct utf8_data *ud = &gc.data;
char *msg;
u_char *ptr;
size_t left, size = 0;
enum utf8_state more;
memcpy(&gc, gcp, sizeof gc);
xvasprintf(&msg, fmt, ap);
ptr = msg;
while (*ptr != '\0') {
if (*ptr > 0x7f && utf8_open(ud, *ptr) == UTF8_MORE) {
ptr++;
left = strlen(ptr);
if (left < (size_t)ud->size - 1)
break;
while ((more = utf8_append(ud, *ptr)) == UTF8_MORE)
ptr++;
ptr++;
if (more != UTF8_DONE)
continue;
if (maxlen > 0 && size + ud->width > (size_t)maxlen) {
while (size < (size_t)maxlen) {
screen_write_putc(ctx, &gc, ' ');
size++;
}
break;
}
size += ud->width;
screen_write_cell(ctx, &gc);
} else {
if (maxlen > 0 && size + 1 > (size_t)maxlen)
break;
if (*ptr == '\001')
gc.attr ^= GRID_ATTR_CHARSET;
else if (*ptr > 0x1f && *ptr < 0x7f) {
size++;
screen_write_putc(ctx, &gc, *ptr);
}
ptr++;
}
}
free(msg);
}
/* Copy from another screen. Assumes target region is big enough. */
void
screen_write_copy(struct screen_write_ctx *ctx, struct screen *src, u_int px,
u_int py, u_int nx, u_int ny, bitstr_t *mbs, const struct grid_cell *mgc)
{
struct screen *s = ctx->s;
struct grid *gd = src->grid;
struct grid_cell gc;
u_int xx, yy, cx, cy, b;
if (nx == 0 || ny == 0)
return;
cx = s->cx;
cy = s->cy;
for (yy = py; yy < py + ny; yy++) {
for (xx = px; xx < px + nx; xx++) {
grid_get_cell(gd, xx, yy, &gc);
if (mbs != NULL) {
b = (yy * screen_size_x(src)) + xx;
if (bit_test(mbs, b)) {
gc.attr = mgc->attr;
gc.fg = mgc->fg;
gc.bg = mgc->bg;
}
}
if (xx + gc.data.width <= px + nx)
screen_write_cell(ctx, &gc);
}
cy++;
screen_write_set_cursor(ctx, cx, cy);
}
}
/*
* Copy from another screen but without the selection stuff. Also assumes the
* target region is already big enough.
*/
void
screen_write_fast_copy(struct screen_write_ctx *ctx, struct screen *src,
u_int px, u_int py, u_int nx, u_int ny)
{
struct screen *s = ctx->s;
struct grid *gd = src->grid;
struct grid_cell gc;
u_int xx, yy, cx, cy;
if (nx == 0 || ny == 0)
return;
cy = s->cy;
for (yy = py; yy < py + ny; yy++) {
if (yy >= gd->hsize + gd->sy)
break;
cx = s->cx;
for (xx = px; xx < px + nx; xx++) {
if (xx >= grid_get_line(gd, yy)->cellsize)
break;
grid_get_cell(gd, xx, yy, &gc);
if (xx + gc.data.width > px + nx)
break;
grid_view_set_cell(ctx->s->grid, cx, cy, &gc);
cx++;
}
cy++;
}
}
/* Draw a horizontal line on screen. */
void
screen_write_hline(struct screen_write_ctx *ctx, u_int nx, int left, int right)
{
struct screen *s = ctx->s;
struct grid_cell gc;
u_int cx, cy, i;
cx = s->cx;
cy = s->cy;
memcpy(&gc, &grid_default_cell, sizeof gc);
gc.attr |= GRID_ATTR_CHARSET;
screen_write_putc(ctx, &gc, left ? 't' : 'q');
for (i = 1; i < nx - 1; i++)
screen_write_putc(ctx, &gc, 'q');
screen_write_putc(ctx, &gc, right ? 'u' : 'q');
screen_write_set_cursor(ctx, cx, cy);
}
/* Draw a horizontal line on screen. */
void
screen_write_vline(struct screen_write_ctx *ctx, u_int ny, int top, int bottom)
{
struct screen *s = ctx->s;
struct grid_cell gc;
u_int cx, cy, i;
cx = s->cx;
cy = s->cy;
memcpy(&gc, &grid_default_cell, sizeof gc);
gc.attr |= GRID_ATTR_CHARSET;
screen_write_putc(ctx, &gc, top ? 'w' : 'x');
for (i = 1; i < ny - 1; i++) {
screen_write_set_cursor(ctx, cx, cy + i);
screen_write_putc(ctx, &gc, 'x');
}
screen_write_set_cursor(ctx, cx, cy + ny - 1);
screen_write_putc(ctx, &gc, bottom ? 'v' : 'x');
screen_write_set_cursor(ctx, cx, cy);
}
/* Draw a menu on screen. */
void
screen_write_menu(struct screen_write_ctx *ctx, struct menu *menu,
int choice, const struct grid_cell *choice_gc)
{
struct screen *s = ctx->s;
struct grid_cell default_gc;
const struct grid_cell *gc = &default_gc;
u_int cx, cy, i, j;
const char *name;
cx = s->cx;
cy = s->cy;
memcpy(&default_gc, &grid_default_cell, sizeof default_gc);
screen_write_box(ctx, menu->width + 4, menu->count + 2);
screen_write_cursormove(ctx, cx + 2, cy, 0);
format_draw(ctx, &default_gc, menu->width, menu->title, NULL);
for (i = 0; i < menu->count; i++) {
name = menu->items[i].name;
if (name == NULL) {
screen_write_cursormove(ctx, cx, cy + 1 + i, 0);
screen_write_hline(ctx, menu->width + 4, 1, 1);
} else {
if (choice >= 0 && i == (u_int)choice && *name != '-')
gc = choice_gc;
screen_write_cursormove(ctx, cx + 2, cy + 1 + i, 0);
for (j = 0; j < menu->width; j++)
screen_write_putc(ctx, gc, ' ');
screen_write_cursormove(ctx, cx + 2, cy + 1 + i, 0);
if (*name == '-') {
name++;
default_gc.attr |= GRID_ATTR_DIM;
format_draw(ctx, gc, menu->width, name, NULL);
default_gc.attr &= ~GRID_ATTR_DIM;
} else
format_draw(ctx, gc, menu->width, name, NULL);
gc = &default_gc;
}
}
screen_write_set_cursor(ctx, cx, cy);
}
/* Draw a box on screen. */
void
screen_write_box(struct screen_write_ctx *ctx, u_int nx, u_int ny)
{
struct screen *s = ctx->s;
struct grid_cell gc;
u_int cx, cy, i;
cx = s->cx;
cy = s->cy;
memcpy(&gc, &grid_default_cell, sizeof gc);
gc.attr |= GRID_ATTR_CHARSET;
screen_write_putc(ctx, &gc, 'l');
for (i = 1; i < nx - 1; i++)
screen_write_putc(ctx, &gc, 'q');
screen_write_putc(ctx, &gc, 'k');
screen_write_set_cursor(ctx, cx, cy + ny - 1);
screen_write_putc(ctx, &gc, 'm');
for (i = 1; i < nx - 1; i++)
screen_write_putc(ctx, &gc, 'q');
screen_write_putc(ctx, &gc, 'j');
for (i = 1; i < ny - 1; i++) {
screen_write_set_cursor(ctx, cx, cy + i);
screen_write_putc(ctx, &gc, 'x');
}
for (i = 1; i < ny - 1; i++) {
screen_write_set_cursor(ctx, cx + nx - 1, cy + i);
screen_write_putc(ctx, &gc, 'x');
}
screen_write_set_cursor(ctx, cx, cy);
}
/*
* Write a preview version of a window. Assumes target area is big enough and
* already cleared.
*/
void
screen_write_preview(struct screen_write_ctx *ctx, struct screen *src, u_int nx,
u_int ny)
{
struct screen *s = ctx->s;
struct grid_cell gc;
u_int cx, cy, px, py;
cx = s->cx;
cy = s->cy;
/*
* If the cursor is on, pick the area around the cursor, otherwise use
* the top left.
*/
if (src->mode & MODE_CURSOR) {
px = src->cx;
if (px < nx / 3)
px = 0;
else
px = px - nx / 3;
if (px + nx > screen_size_x(src)) {
if (nx > screen_size_x(src))
px = 0;
else
px = screen_size_x(src) - nx;
}
py = src->cy;
if (py < ny / 3)
py = 0;
else
py = py - ny / 3;
if (py + ny > screen_size_y(src)) {
if (ny > screen_size_y(src))
py = 0;
else
py = screen_size_y(src) - ny;
}
} else {
px = 0;
py = 0;
}
screen_write_fast_copy(ctx, src, px, src->grid->hsize + py, nx, ny);
if (src->mode & MODE_CURSOR) {
grid_view_get_cell(src->grid, src->cx, src->cy, &gc);
gc.attr |= GRID_ATTR_REVERSE;
screen_write_set_cursor(ctx, cx + (src->cx - px),
cy + (src->cy - py));
screen_write_cell(ctx, &gc);
}
}
/* Set a mode. */
void
screen_write_mode_set(struct screen_write_ctx *ctx, int mode)
{
struct screen *s = ctx->s;
s->mode |= mode;
}
/* Clear a mode. */
void
screen_write_mode_clear(struct screen_write_ctx *ctx, int mode)
{
struct screen *s = ctx->s;
s->mode &= ~mode;
}
/* Cursor up by ny. */
void
screen_write_cursorup(struct screen_write_ctx *ctx, u_int ny)
{
struct screen *s = ctx->s;
u_int cx = s->cx, cy = s->cy;
if (ny == 0)
ny = 1;
if (cy < s->rupper) {
/* Above region. */
if (ny > cy)
ny = cy;
} else {
/* Below region. */
if (ny > cy - s->rupper)
ny = cy - s->rupper;
}
if (cx == screen_size_x(s))
cx--;
cy -= ny;
screen_write_set_cursor(ctx, cx, cy);
}
/* Cursor down by ny. */
void
screen_write_cursordown(struct screen_write_ctx *ctx, u_int ny)
{
struct screen *s = ctx->s;
u_int cx = s->cx, cy = s->cy;
if (ny == 0)
ny = 1;
if (cy > s->rlower) {
/* Below region. */
if (ny > screen_size_y(s) - 1 - cy)
ny = screen_size_y(s) - 1 - cy;
} else {
/* Above region. */
if (ny > s->rlower - cy)
ny = s->rlower - cy;
}
if (cx == screen_size_x(s))
cx--;
else if (ny == 0)
return;
cy += ny;
screen_write_set_cursor(ctx, cx, cy);
}
/* Cursor right by nx. */
void
screen_write_cursorright(struct screen_write_ctx *ctx, u_int nx)
{
struct screen *s = ctx->s;
u_int cx = s->cx, cy = s->cy;
if (nx == 0)
nx = 1;
if (nx > screen_size_x(s) - 1 - cx)
nx = screen_size_x(s) - 1 - cx;
if (nx == 0)
return;
cx += nx;
screen_write_set_cursor(ctx, cx, cy);
}
/* Cursor left by nx. */
void
screen_write_cursorleft(struct screen_write_ctx *ctx, u_int nx)
{
struct screen *s = ctx->s;
u_int cx = s->cx, cy = s->cy;
if (nx == 0)
nx = 1;
if (nx > cx)
nx = cx;
if (nx == 0)
return;
cx -= nx;
screen_write_set_cursor(ctx, cx, cy);
}
/* Backspace; cursor left unless at start of wrapped line when can move up. */
void
screen_write_backspace(struct screen_write_ctx *ctx)
{
struct screen *s = ctx->s;
struct grid_line *gl;
u_int cx = s->cx, cy = s->cy;
if (cx == 0) {
if (cy == 0)
return;
gl = grid_get_line(s->grid, s->grid->hsize + cy - 1);
if (gl->flags & GRID_LINE_WRAPPED) {
cy--;
cx = screen_size_x(s) - 1;
}
} else
cx--;
screen_write_set_cursor(ctx, cx, cy);
}
/* VT100 alignment test. */
void
screen_write_alignmenttest(struct screen_write_ctx *ctx)
{
struct screen *s = ctx->s;
struct tty_ctx ttyctx;
struct grid_cell gc;
u_int xx, yy;
memcpy(&gc, &grid_default_cell, sizeof gc);
utf8_set(&gc.data, 'E');
for (yy = 0; yy < screen_size_y(s); yy++) {
for (xx = 0; xx < screen_size_x(s); xx++)
grid_view_set_cell(s->grid, xx, yy, &gc);
}
screen_write_set_cursor(ctx, 0, 0);
s->rupper = 0;
s->rlower = screen_size_y(s) - 1;
screen_write_initctx(ctx, &ttyctx, 1);
screen_write_collect_clear(ctx, 0, screen_size_y(s) - 1);
tty_write(tty_cmd_alignmenttest, &ttyctx);
}
/* Insert nx characters. */
void
screen_write_insertcharacter(struct screen_write_ctx *ctx, u_int nx, u_int bg)
{
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;
if (s->cx > screen_size_x(s) - 1)
return;
screen_write_initctx(ctx, &ttyctx, 0);
ttyctx.bg = bg;
grid_view_insert_cells(s->grid, s->cx, s->cy, nx, bg);
screen_write_collect_flush(ctx, 0, __func__);
ttyctx.num = nx;
tty_write(tty_cmd_insertcharacter, &ttyctx);
}
/* Delete nx characters. */
void
screen_write_deletecharacter(struct screen_write_ctx *ctx, u_int nx, u_int bg)
{
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;
if (s->cx > screen_size_x(s) - 1)
return;
screen_write_initctx(ctx, &ttyctx, 0);
ttyctx.bg = bg;
grid_view_delete_cells(s->grid, s->cx, s->cy, nx, bg);
screen_write_collect_flush(ctx, 0, __func__);
ttyctx.num = nx;
tty_write(tty_cmd_deletecharacter, &ttyctx);
}
/* Clear nx characters. */
void
screen_write_clearcharacter(struct screen_write_ctx *ctx, u_int nx, u_int bg)
{
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;
if (s->cx > screen_size_x(s) - 1)
return;
screen_write_initctx(ctx, &ttyctx, 0);
ttyctx.bg = bg;
grid_view_clear(s->grid, s->cx, s->cy, nx, 1, bg);
screen_write_collect_flush(ctx, 0, __func__);
ttyctx.num = nx;
tty_write(tty_cmd_clearcharacter, &ttyctx);
}
/* Insert ny lines. */
void
screen_write_insertline(struct screen_write_ctx *ctx, u_int ny, u_int bg)
{
struct screen *s = ctx->s;
struct grid *gd = s->grid;
struct tty_ctx ttyctx;
if (ny == 0)
ny = 1;
if (s->cy < s->rupper || s->cy > s->rlower) {
if (ny > screen_size_y(s) - s->cy)
ny = screen_size_y(s) - s->cy;
if (ny == 0)
return;
screen_write_initctx(ctx, &ttyctx, 1);
ttyctx.bg = bg;
grid_view_insert_lines(gd, s->cy, ny, bg);
screen_write_collect_flush(ctx, 0, __func__);
ttyctx.num = ny;
tty_write(tty_cmd_insertline, &ttyctx);
return;
}
if (ny > s->rlower + 1 - s->cy)
ny = s->rlower + 1 - s->cy;
if (ny == 0)
return;
screen_write_initctx(ctx, &ttyctx, 1);
ttyctx.bg = bg;
if (s->cy < s->rupper || s->cy > s->rlower)
grid_view_insert_lines(gd, s->cy, ny, bg);
else
grid_view_insert_lines_region(gd, s->rlower, s->cy, ny, bg);
screen_write_collect_flush(ctx, 0, __func__);
ttyctx.num = ny;
tty_write(tty_cmd_insertline, &ttyctx);
}
/* Delete ny lines. */
void
screen_write_deleteline(struct screen_write_ctx *ctx, u_int ny, u_int bg)
{
struct screen *s = ctx->s;
struct grid *gd = s->grid;
struct tty_ctx ttyctx;
if (ny == 0)
ny = 1;
if (s->cy < s->rupper || s->cy > s->rlower) {
if (ny > screen_size_y(s) - s->cy)
ny = screen_size_y(s) - s->cy;
if (ny == 0)
return;
screen_write_initctx(ctx, &ttyctx, 1);
ttyctx.bg = bg;
grid_view_delete_lines(gd, s->cy, ny, bg);
screen_write_collect_flush(ctx, 0, __func__);
ttyctx.num = ny;
tty_write(tty_cmd_deleteline, &ttyctx);
return;
}
if (ny > s->rlower + 1 - s->cy)
ny = s->rlower + 1 - s->cy;
if (ny == 0)
return;
screen_write_initctx(ctx, &ttyctx, 1);
ttyctx.bg = bg;
if (s->cy < s->rupper || s->cy > s->rlower)
grid_view_delete_lines(gd, s->cy, ny, bg);
else
grid_view_delete_lines_region(gd, s->rlower, s->cy, ny, bg);
screen_write_collect_flush(ctx, 0, __func__);
ttyctx.num = ny;
tty_write(tty_cmd_deleteline, &ttyctx);
}
/* Clear line at cursor. */
void
screen_write_clearline(struct screen_write_ctx *ctx, u_int bg)
{
struct screen *s = ctx->s;
struct grid_line *gl;
u_int sx = screen_size_x(s);
gl = grid_get_line(s->grid, s->grid->hsize + s->cy);
if (gl->cellsize == 0 && COLOUR_DEFAULT(bg))
return;
grid_view_clear(s->grid, 0, s->cy, sx, 1, bg);
screen_write_collect_clear(ctx, s->cy, 1);
ctx->s->write_list[s->cy].bg = 1 + bg;
ctx->item->used = 0;
}
/* 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;
u_int sx = screen_size_x(s);
struct screen_write_collect_item *ci = ctx->item;
if (s->cx == 0) {
screen_write_clearline(ctx, bg);
return;
}
gl = grid_get_line(s->grid, s->grid->hsize + s->cy);
if (s->cx > sx - 1 || (s->cx >= gl->cellsize && COLOUR_DEFAULT(bg)))
return;
grid_view_clear(s->grid, s->cx, s->cy, sx - s->cx, 1, bg);
if (!screen_write_collect_clear_end(ctx, s->cy, s->cx, bg)) {
ci->x = s->cx;
ci->type = CLEAR_END;
ci->bg = bg;
TAILQ_INSERT_TAIL(&ctx->s->write_list[s->cy].items, ci, entry);
ctx->item = xcalloc(1, sizeof *ctx->item);
}
}
/* Clear to start of line from cursor. */
void
screen_write_clearstartofline(struct screen_write_ctx *ctx, u_int bg)
{
struct screen *s = ctx->s;
u_int sx = screen_size_x(s);
struct screen_write_collect_item *ci = ctx->item;
if (s->cx >= sx - 1) {
screen_write_clearline(ctx, bg);
return;
}
if (s->cx > sx - 1)
grid_view_clear(s->grid, 0, s->cy, sx, 1, bg);
else
grid_view_clear(s->grid, 0, s->cy, s->cx + 1, 1, bg);
if (!screen_write_collect_clear_start(ctx, s->cy, s->cx, bg)) {
ci->x = s->cx;
ci->type = CLEAR_START;
ci->bg = bg;
TAILQ_INSERT_TAIL(&ctx->s->write_list[s->cy].items, ci, entry);
ctx->item = xcalloc(1, sizeof *ctx->item);
}
}
/* Move cursor to px,py. */
void
screen_write_cursormove(struct screen_write_ctx *ctx, int px, int py,
int origin)
{
struct screen *s = ctx->s;
if (origin && py != -1 && (s->mode & MODE_ORIGIN)) {
if ((u_int)py > s->rlower - s->rupper)
py = s->rlower;
else
py += s->rupper;
}
if (px != -1 && (u_int)px > screen_size_x(s) - 1)
px = screen_size_x(s) - 1;
if (py != -1 && (u_int)py > screen_size_y(s) - 1)
py = screen_size_y(s) - 1;
screen_write_set_cursor(ctx, px, py);
}
/* Reverse index (up with scroll). */
void
screen_write_reverseindex(struct screen_write_ctx *ctx, u_int bg)
{
struct screen *s = ctx->s;
struct tty_ctx ttyctx;
if (s->cy == s->rupper) {
grid_view_scroll_region_down(s->grid, s->rupper, s->rlower, bg);
screen_write_collect_flush(ctx, 0, __func__);
screen_write_initctx(ctx, &ttyctx, 1);
ttyctx.bg = bg;
tty_write(tty_cmd_reverseindex, &ttyctx);
} else if (s->cy > 0)
screen_write_set_cursor(ctx, -1, s->cy - 1);
}
/* Set scroll region. */
void
screen_write_scrollregion(struct screen_write_ctx *ctx, u_int rupper,
u_int rlower)
{
struct screen *s = ctx->s;
if (rupper > screen_size_y(s) - 1)
rupper = screen_size_y(s) - 1;
if (rlower > screen_size_y(s) - 1)
rlower = screen_size_y(s) - 1;
if (rupper >= rlower) /* cannot be one line */
return;
screen_write_collect_flush(ctx, 0, __func__);
/* Cursor moves to top-left. */
screen_write_set_cursor(ctx, 0, 0);
s->rupper = rupper;
s->rlower = rlower;
}
/* Line feed. */
void
screen_write_linefeed(struct screen_write_ctx *ctx, int wrapped, u_int bg)
{
struct screen *s = ctx->s;
struct grid *gd = s->grid;
struct grid_line *gl;
gl = grid_get_line(gd, gd->hsize + s->cy);
if (wrapped)
gl->flags |= GRID_LINE_WRAPPED;
else
gl->flags &= ~GRID_LINE_WRAPPED;
log_debug("%s: at %u,%u (region %u-%u)", __func__, s->cx, s->cy,
s->rupper, s->rlower);
if (bg != ctx->bg) {
screen_write_collect_flush(ctx, 1, __func__);
ctx->bg = bg;
}
if (s->cy == s->rlower) {
grid_view_scroll_region_up(gd, s->rupper, s->rlower, bg);
screen_write_collect_scroll(ctx);
ctx->scrolled++;
} else if (s->cy < screen_size_y(s) - 1)
screen_write_set_cursor(ctx, -1, s->cy + 1);
}
/* Scroll up. */
void
screen_write_scrollup(struct screen_write_ctx *ctx, u_int lines, u_int bg)
{
struct screen *s = ctx->s;
struct grid *gd = s->grid;
u_int i;
if (lines == 0)
lines = 1;
else if (lines > s->rlower - s->rupper + 1)
lines = s->rlower - s->rupper + 1;
if (bg != ctx->bg) {
screen_write_collect_flush(ctx, 1, __func__);
ctx->bg = bg;
}
for (i = 0; i < lines; i++) {
grid_view_scroll_region_up(gd, s->rupper, s->rlower, bg);
screen_write_collect_scroll(ctx);
}
ctx->scrolled += lines;
}
/* Scroll down. */
void
screen_write_scrolldown(struct screen_write_ctx *ctx, u_int lines, u_int bg)
{
struct screen *s = ctx->s;
struct grid *gd = s->grid;
struct tty_ctx ttyctx;
u_int i;
screen_write_initctx(ctx, &ttyctx, 1);
ttyctx.bg = bg;
if (lines == 0)
lines = 1;
else if (lines > s->rlower - s->rupper + 1)
lines = s->rlower - s->rupper + 1;
for (i = 0; i < lines; i++)
grid_view_scroll_region_down(gd, s->rupper, s->rlower, bg);
screen_write_collect_flush(ctx, 0, __func__);
ttyctx.num = lines;
tty_write(tty_cmd_scrolldown, &ttyctx);
}
/* Carriage return (cursor to start of line). */
void
screen_write_carriagereturn(struct screen_write_ctx *ctx)
{
screen_write_set_cursor(ctx, 0, -1);
}
/* 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 grid *gd = s->grid;
struct tty_ctx ttyctx;
u_int sx = screen_size_x(s), sy = screen_size_y(s);
screen_write_initctx(ctx, &ttyctx, 1);
ttyctx.bg = bg;
/* Scroll into history if it is enabled and clearing entire screen. */
if (s->cx == 0 && s->cy == 0 && (gd->flags & GRID_HISTORY))
grid_view_clear_history(gd, bg);
else {
if (s->cx <= sx - 1)
grid_view_clear(gd, s->cx, s->cy, sx - s->cx, 1, bg);
grid_view_clear(gd, 0, s->cy + 1, sx, sy - (s->cy + 1), bg);
}
screen_write_collect_clear(ctx, s->cy + 1, sy - (s->cy + 1));
screen_write_collect_flush(ctx, 0, __func__);
tty_write(tty_cmd_clearendofscreen, &ttyctx);
}
/* Clear to start of screen. */
void
screen_write_clearstartofscreen(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, 1);
ttyctx.bg = bg;
if (s->cy > 0)
grid_view_clear(s->grid, 0, 0, sx, s->cy, bg);
if (s->cx > sx - 1)
grid_view_clear(s->grid, 0, s->cy, sx, 1, bg);
else
grid_view_clear(s->grid, 0, s->cy, s->cx + 1, 1, bg);
screen_write_collect_clear(ctx, 0, s->cy);
screen_write_collect_flush(ctx, 0, __func__);
tty_write(tty_cmd_clearstartofscreen, &ttyctx);
}
/* Clear entire screen. */
void
screen_write_clearscreen(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, 1);
ttyctx.bg = bg;
/* Scroll into history if it is enabled. */
if (s->grid->flags & GRID_HISTORY)
grid_view_clear_history(s->grid, bg);
else
grid_view_clear(s->grid, 0, 0, sx, sy, bg);
screen_write_collect_clear(ctx, 0, sy);
tty_write(tty_cmd_clearscreen, &ttyctx);
}
/* Clear entire history. */
void
screen_write_clearhistory(struct screen_write_ctx *ctx)
{
grid_clear_history(ctx->s->grid);
}
/* Clear to start of a collected line. */
static int
screen_write_collect_clear_start(struct screen_write_ctx *ctx, u_int y, u_int x,
u_int bg)
{
struct screen_write_collect_item *ci, *tmp;
size_t size = 0;
u_int items = 0;
int redundant = 0;
if (TAILQ_EMPTY(&ctx->s->write_list[y].items))
return (0);
TAILQ_FOREACH_SAFE(ci, &ctx->s->write_list[y].items, entry, tmp) {
switch (ci->type) {
case CLEAR_START:
if (ci->x >= x) {
if (ci->bg == bg)
redundant = 1;
continue;
}
break;
case CLEAR_END:
if (ci->x <= x)
ci->x = x;
continue;
case TEXT:
if (ci->x > x)
continue;
break;
}
items++;
size += ci->used;
TAILQ_REMOVE(&ctx->s->write_list[y].items, ci, entry);
free(ci);
}
ctx->skipped += size;
log_debug("%s: dropped %u items (%zu bytes) (line %u)", __func__, items,
size, y);
return (redundant);
}
/* Clear to end of a collected line. */
static int
screen_write_collect_clear_end(struct screen_write_ctx *ctx, u_int y, u_int x,
u_int bg)
{
struct screen_write_collect_item *ci, *tmp;
size_t size = 0;
int redundant = 0;
u_int items = 0;
if (TAILQ_EMPTY(&ctx->s->write_list[y].items))
return (0);
TAILQ_FOREACH_SAFE(ci, &ctx->s->write_list[y].items, entry, tmp) {
switch (ci->type) {
case CLEAR_START:
if (ci->x >= x)
ci->x = x;
continue;
case CLEAR_END:
if (ci->x <= x) {
if (ci->bg == bg)
redundant = 1;
continue;
}
break;
case TEXT:
if (ci->x < x)
continue;
break;
}
items++;
size += ci->used;
TAILQ_REMOVE(&ctx->s->write_list[y].items, ci, entry);
free(ci);
}
ctx->skipped += size;
log_debug("%s: dropped %u items (%zu bytes) (line %u)", __func__, items,
size, y);
return (redundant);
}
/* Clear collected lines. */
static void
screen_write_collect_clear(struct screen_write_ctx *ctx, u_int y, u_int n)
{
struct screen_write_collect_item *ci, *tmp;
struct screen_write_collect_line *cl;
u_int i, items;
size_t size;
for (i = y; i < y + n; i++) {
if (TAILQ_EMPTY(&ctx->s->write_list[i].items))
continue;
items = 0;
size = 0;
cl = &ctx->s->write_list[i];
TAILQ_FOREACH_SAFE(ci, &cl->items, entry, tmp) {
items++;
size += ci->used;
TAILQ_REMOVE(&cl->items, ci, entry);
free(ci);
}
ctx->skipped += size;
log_debug("%s: dropped %u items (%zu bytes) (line %u)",
__func__, items, size, y);
}
}
/* Scroll collected lines up. */
static void
screen_write_collect_scroll(struct screen_write_ctx *ctx)
{
struct screen *s = ctx->s;
struct screen_write_collect_line *cl;
u_int y;
char *saved;
log_debug("%s: at %u,%u (region %u-%u)", __func__, s->cx, s->cy,
s->rupper, s->rlower);
screen_write_collect_clear(ctx, s->rupper, 1);
saved = ctx->s->write_list[s->rupper].data;
for (y = s->rupper; y < s->rlower; y++) {
cl = &ctx->s->write_list[y + 1];
TAILQ_CONCAT(&ctx->s->write_list[y].items, &cl->items, entry);
ctx->s->write_list[y].data = cl->data;
}
ctx->s->write_list[s->rlower].data = saved;
ctx->s->write_list[s->rlower].bg = 1 + 8;
}
/* Flush collected lines. */
static void
screen_write_collect_flush(struct screen_write_ctx *ctx, int scroll_only,
const char *from)
{
struct screen *s = ctx->s;
struct screen_write_collect_item *ci, *tmp;
struct screen_write_collect_line *cl;
u_int y, cx, cy, items = 0;
struct tty_ctx ttyctx;
size_t written = 0;
if (ctx->scrolled != 0) {
log_debug("%s: scrolled %u (region %u-%u)", __func__,
ctx->scrolled, s->rupper, s->rlower);
if (ctx->scrolled > s->rlower - s->rupper + 1)
ctx->scrolled = s->rlower - s->rupper + 1;
screen_write_initctx(ctx, &ttyctx, 1);
ttyctx.num = ctx->scrolled;
ttyctx.bg = ctx->bg;
tty_write(tty_cmd_scrollup, &ttyctx);
}
ctx->scrolled = 0;
ctx->bg = 8;
if (scroll_only)
return;
cx = s->cx; cy = s->cy;
for (y = 0; y < screen_size_y(s); y++) {
cl = &ctx->s->write_list[y];
if (cl->bg != 0) {
screen_write_set_cursor(ctx, 0, y);
screen_write_initctx(ctx, &ttyctx, 1);
ttyctx.bg = cl->bg - 1;
tty_write(tty_cmd_clearline, &ttyctx);
}
TAILQ_FOREACH_SAFE(ci, &cl->items, entry, tmp) {
screen_write_set_cursor(ctx, ci->x, y);
if (ci->type == CLEAR_END) {
screen_write_initctx(ctx, &ttyctx, 1);
ttyctx.bg = ci->bg;
tty_write(tty_cmd_clearendofline, &ttyctx);
} else if (ci->type == CLEAR_START) {
screen_write_initctx(ctx, &ttyctx, 1);
ttyctx.bg = ci->bg;
tty_write(tty_cmd_clearstartofline, &ttyctx);
} else {
screen_write_initctx(ctx, &ttyctx, 0);
ttyctx.cell = &ci->gc;
ttyctx.wrapped = ci->wrapped;
ttyctx.ptr = cl->data + ci->x;
ttyctx.num = ci->used;
tty_write(tty_cmd_cells, &ttyctx);
}
items++;
written += ci->used;
TAILQ_REMOVE(&cl->items, ci, entry);
free(ci);
}
cl->bg = 0;
}
s->cx = cx; s->cy = cy;
log_debug("%s: flushed %u items (%zu bytes) (%s)", __func__, items,
written, from);
ctx->written += written;
}
/* Finish and store collected cells. */
void
screen_write_collect_end(struct screen_write_ctx *ctx)
{
struct screen *s = ctx->s;
struct screen_write_collect_item *ci = ctx->item;
struct screen_write_collect_line *cl = &s->write_list[s->cy];
struct grid_cell gc;
u_int xx;
if (ci->used == 0)
return;
ci->x = s->cx;
TAILQ_INSERT_TAIL(&cl->items, ci, entry);
ctx->item = xcalloc(1, sizeof *ctx->item);
log_debug("%s: %u %.*s (at %u,%u)", __func__, ci->used,
(int)ci->used, cl->data + ci->x, s->cx, s->cy);
if (s->cx != 0) {
for (xx = s->cx; xx > 0; xx--) {
grid_view_get_cell(s->grid, xx, s->cy, &gc);
if (~gc.flags & GRID_FLAG_PADDING)
break;
grid_view_set_cell(s->grid, xx, s->cy,
&grid_default_cell);
}
if (gc.data.width > 1) {
grid_view_set_cell(s->grid, xx, s->cy,
&grid_default_cell);
}
}
grid_view_set_cells(s->grid, s->cx, s->cy, &ci->gc, cl->data + ci->x,
ci->used);
screen_write_set_cursor(ctx, s->cx + ci->used, -1);
for (xx = s->cx; xx < screen_size_x(s); xx++) {
grid_view_get_cell(s->grid, xx, s->cy, &gc);
if (~gc.flags & GRID_FLAG_PADDING)
break;
grid_view_set_cell(s->grid, xx, s->cy, &grid_default_cell);
}
}
/* Write cell data, collecting if necessary. */
void
screen_write_collect_add(struct screen_write_ctx *ctx,
const struct grid_cell *gc)
{
struct screen *s = ctx->s;
struct screen_write_collect_item *ci;
u_int sx = screen_size_x(s);
int collect;
/*
* Don't need to check that the attributes and whatnot are still the
* same - input_parse will end the collection when anything that isn't
* a plain character is encountered.
*/
collect = 1;
if (gc->data.width != 1 || gc->data.size != 1 || *gc->data.data >= 0x7f)
collect = 0;
else if (gc->attr & GRID_ATTR_CHARSET)
collect = 0;
else if (~s->mode & MODE_WRAP)
collect = 0;
else if (s->mode & MODE_INSERT)
collect = 0;
else if (s->sel != NULL)
collect = 0;
if (!collect) {
screen_write_collect_end(ctx);
screen_write_collect_flush(ctx, 0, __func__);
screen_write_cell(ctx, gc);
return;
}
ctx->cells++;
if (s->cx > sx - 1 || ctx->item->used > sx - 1 - s->cx)
screen_write_collect_end(ctx);
ci = ctx->item; /* may have changed */
if (s->cx > sx - 1) {
log_debug("%s: wrapped at %u,%u", __func__, s->cx, s->cy);
ci->wrapped = 1;
screen_write_linefeed(ctx, 1, 8);
screen_write_set_cursor(ctx, 0, -1);
}
if (ci->used == 0)
memcpy(&ci->gc, gc, sizeof ci->gc);
if (ctx->s->write_list[s->cy].data == NULL)
ctx->s->write_list[s->cy].data = xmalloc(screen_size_x(ctx->s));
ctx->s->write_list[s->cy].data[s->cx + ci->used++] = gc->data.data[0];
}
/* 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 grid_line *gl;
struct grid_cell_entry *gce;
struct grid_cell tmp_gc, now_gc;
struct tty_ctx ttyctx;
u_int sx = screen_size_x(s), sy = screen_size_y(s);
u_int width = gc->data.width, xx, last, cx, cy;
int selected, skip = 1;
/* Ignore padding cells. */
if (gc->flags & GRID_FLAG_PADDING)
return;
ctx->cells++;
/* If the width is zero, combine onto the previous character. */
if (width == 0) {
screen_write_collect_flush(ctx, 0, __func__);
if ((gc = screen_write_combine(ctx, &gc->data, &xx)) != 0) {
cx = s->cx; cy = s->cy;
screen_write_set_cursor(ctx, xx, s->cy);
screen_write_initctx(ctx, &ttyctx, 0);
ttyctx.cell = gc;
tty_write(tty_cmd_cell, &ttyctx);
s->cx = cx; s->cy = cy;
}
return;
}
/* Flush any existing scrolling. */
screen_write_collect_flush(ctx, 1, __func__);
/* If this character doesn't fit, ignore it. */
if ((~s->mode & MODE_WRAP) &&
width > 1 &&
(width > sx || (s->cx != sx && s->cx > sx - width)))
return;
/* If in insert mode, make space for the cells. */
if (s->mode & MODE_INSERT) {
grid_view_insert_cells(s->grid, s->cx, s->cy, width, 8);
skip = 0;
}
/* Check this will fit on the current line and wrap if not. */
if ((s->mode & MODE_WRAP) && s->cx > sx - width) {
log_debug("%s: wrapped at %u,%u", __func__, s->cx, s->cy);
screen_write_linefeed(ctx, 1, 8);
screen_write_set_cursor(ctx, 0, -1);
screen_write_collect_flush(ctx, 1, __func__);
}
/* Sanity check cursor position. */
if (s->cx > sx - width || s->cy > sy - 1)
return;
screen_write_initctx(ctx, &ttyctx, 0);
/* Handle overwriting of UTF-8 characters. */
gl = grid_get_line(s->grid, 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++) {
log_debug("%s: new padding at %u,%u", __func__, xx, s->cy);
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)
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)
skip = 0;
else if (gc->data.size != 1)
skip = 0;
else if (gce->data.data != gc->data.data[0])
skip = 0;
}
}
/* Update the selected flag and set the cell. */
selected = screen_check_selection(s, s->cx, s->cy);
if (selected && (~gc->flags & GRID_FLAG_SELECTED)) {
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)) {
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);
if (selected)
skip = 0;
/*
* 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)
screen_write_set_cursor(ctx, s->cx + width, -1);
else
screen_write_set_cursor(ctx, sx - last, -1);
/* Create space for character in insert mode. */
if (s->mode & MODE_INSERT) {
screen_write_collect_flush(ctx, 0, __func__);
ttyctx.num = width;
tty_write(tty_cmd_insertcharacter, &ttyctx);
}
/* Write to the screen. */
if (!skip) {
if (selected) {
screen_select_cell(s, &tmp_gc, gc);
ttyctx.cell = &tmp_gc;
} else
ttyctx.cell = gc;
tty_write(tty_cmd_cell, &ttyctx);
ctx->written++;
} else
ctx->skipped++;
}
/* Combine a UTF-8 zero-width character onto the previous. */
static const struct grid_cell *
screen_write_combine(struct screen_write_ctx *ctx, const struct utf8_data *ud,
u_int *xx)
{
struct screen *s = ctx->s;
struct grid *gd = s->grid;
static struct grid_cell gc;
u_int n;
/* Can't combine if at 0. */
if (s->cx == 0)
return (NULL);
/* Empty data is out. */
if (ud->size == 0)
fatalx("UTF-8 data empty");
/* Retrieve the previous cell. */
for (n = 1; n <= s->cx; n++) {
grid_view_get_cell(gd, s->cx - n, s->cy, &gc);
if (~gc.flags & GRID_FLAG_PADDING)
break;
}
if (n > s->cx)
return (NULL);
*xx = s->cx - n;
/* Check there is enough space. */
if (gc.data.size + ud->size > sizeof gc.data.data)
return (NULL);
log_debug("%s: %.*s onto %.*s at %u,%u", __func__, (int)ud->size,
ud->data, (int)gc.data.size, gc.data.data, *xx, s->cy);
/* Append the data. */
memcpy(gc.data.data + gc.data.size, ud->data, ud->size);
gc.data.size += ud->size;
/* Set the new cell. */
grid_view_set_cell(gd, *xx, s->cy, &gc);
return (&gc);
}
/*
* 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.
*/
static int
screen_write_overwrite(struct screen_write_ctx *ctx, struct grid_cell *gc,
u_int width)
{
struct screen *s = ctx->s;
struct grid *gd = s->grid;
struct grid_cell tmp_gc;
u_int xx;
int done = 0;
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) {
grid_view_get_cell(gd, xx, s->cy, &tmp_gc);
if (~tmp_gc.flags & GRID_FLAG_PADDING)
break;
log_debug("%s: padding at %u,%u", __func__, xx, s->cy);
grid_view_set_cell(gd, xx, s->cy, &grid_default_cell);
}
/* Overwrite the character at the start of this padding. */
log_debug("%s: character at %u,%u", __func__, xx, s->cy);
grid_view_set_cell(gd, xx, s->cy, &grid_default_cell);
done = 1;
}
/*
* Overwrite any padding cells that belong to any UTF-8 characters
* we'll be overwriting with the current character.
*/
if (width != 1 ||
gc->data.width != 1 ||
gc->flags & GRID_FLAG_PADDING) {
xx = s->cx + width - 1;
while (++xx < screen_size_x(s)) {
grid_view_get_cell(gd, xx, s->cy, &tmp_gc);
if (~tmp_gc.flags & GRID_FLAG_PADDING)
break;
log_debug("%s: overwrite at %u,%u", __func__, xx,
s->cy);
grid_view_set_cell(gd, xx, s->cy, &grid_default_cell);
done = 1;
}
}
return (done);
}
/* Set external clipboard. */
void
screen_write_setselection(struct screen_write_ctx *ctx, u_char *str, u_int len)
{
struct tty_ctx ttyctx;
screen_write_initctx(ctx, &ttyctx, 0);
ttyctx.ptr = str;
ttyctx.num = len;
tty_write(tty_cmd_setselection, &ttyctx);
}
/* Write unmodified string. */
void
screen_write_rawstring(struct screen_write_ctx *ctx, u_char *str, u_int len)
{
struct tty_ctx ttyctx;
screen_write_initctx(ctx, &ttyctx, 0);
ttyctx.ptr = str;
ttyctx.num = len;
tty_write(tty_cmd_rawstring, &ttyctx);
}