C++ screen_size_y函数代码示例

void
tty_cmd_clearendofscreen(struct tty *tty, const struct tty_ctx *ctx)
{
	struct window_pane	*wp = ctx->wp;
	struct screen		*s = wp->screen;
	u_int		 	 i, j;

	tty_reset(tty);

	tty_region_pane(tty, ctx, 0, screen_size_y(s) - 1);
	tty_cursor_pane(tty, ctx, ctx->ocx, ctx->ocy);

	if (tty_pane_full_width(tty, ctx) && tty_term_has(tty->term, TTYC_EL)) {
		tty_putcode(tty, TTYC_EL);
		if (ctx->ocy != screen_size_y(s) - 1) {
			tty_cursor_pane(tty, ctx, 0, ctx->ocy + 1);
			for (i = ctx->ocy + 1; i < screen_size_y(s); i++) {
				tty_putcode(tty, TTYC_EL);
				if (i == screen_size_y(s) - 1)
					continue;
				tty_emulate_repeat(tty, TTYC_CUD, TTYC_CUD1, 1);
				tty->cy++;
			}
		}
	} else {
		tty_repeat_space(tty, screen_size_x(s) - ctx->ocx);
		for (j = ctx->ocy + 1; j < screen_size_y(s); j++) {
			tty_cursor_pane(tty, ctx, 0, j);
			tty_repeat_space(tty, screen_size_x(s));
		}
	}
}

void
window_more_key(struct window_pane *wp, unused struct client *c, int key)
{
	struct window_more_mode_data	*data = wp->modedata;
	struct screen			*s = &data->screen;

	switch (mode_key_lookup(&data->mdata, key)) {
	case MODEKEYCHOICE_CANCEL:
		window_pane_reset_mode(wp);
		break;
	case MODEKEYCHOICE_UP:
		window_more_scroll_up(wp);
		break;
	case MODEKEYCHOICE_DOWN:
		window_more_scroll_down(wp);
		break;
	case MODEKEYCHOICE_PAGEUP:
		if (data->top < screen_size_y(s))
			data->top = 0;
		else
			data->top -= screen_size_y(s);
		window_more_redraw_screen(wp);
		break;
	case MODEKEYCHOICE_PAGEDOWN:
		if (data->top + screen_size_y(s) > ARRAY_LENGTH(&data->list))
			data->top = ARRAY_LENGTH(&data->list);
		else
			data->top += screen_size_y(s);
		window_more_redraw_screen(wp);
		break;
	default:
		break;
	}
}

/* Initialize writing with a window. */
void
screen_write_start(struct screen_write_ctx *ctx, struct window_pane *wp,
    struct screen *s)
{
	u_int		 size;
	char		 tmp[16];
	const char	*cp = tmp;

	ctx->wp = wp;
	if (wp != NULL && s == NULL)
		ctx->s = wp->screen;
	else
		ctx->s = s;

	size = screen_size_x(ctx->s) * screen_size_y(ctx->s);
	if (ctx->s->dirtysize != size) {
		free(ctx->s->dirty);
		ctx->s->dirty = NULL;
		ctx->s->dirtysize = size;
	}
	ctx->dirty = 0;

	ctx->cells = ctx->written = ctx->skipped = 0;

	if (wp == NULL)
		cp = "no pane";
	else
		snprintf(tmp, sizeof tmp, "pane %%%u", wp->id);
	log_debug("%s: size %ux%u, %s", __func__, screen_size_x(ctx->s),
	    screen_size_y(ctx->s), cp);
}

/* 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;
	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);

	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);
	}

	s->cx = 0;
	s->cy = 0;

	s->rupper = 0;
	s->rlower = screen_size_y(s) - 1;

	tty_write(tty_cmd_alignmenttest, &ttyctx);
}

/* 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;

	screen_write_initctx(ctx, &ttyctx, 0);

	memcpy(&gc, &grid_default_cell, sizeof gc);
	grid_cell_one(&gc, '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);
	}

	s->cx = 0;
	s->cy = 0;

	s->rupper = 0;

	s->rlower = screen_size_y(s) - 1;

	tty_write(tty_cmd_alignmenttest, &ttyctx);
}

void
tty_cmd_clearscreen(
    struct tty *tty, struct window_pane *wp, unused va_list ap)
{
	struct screen	*s = wp->screen;
	u_int		 i, j;

	tty_reset(tty);

	tty_region(tty, 0, screen_size_y(s) - 1, wp->yoff);
	tty_cursor(tty, 0, 0, wp->xoff, wp->yoff);
	if (wp->xoff == 0 && screen_size_x(s) >= tty->sx &&
	    tty_term_has(tty->term, TTYC_EL)) {
		for (i = 0; i < screen_size_y(s); i++) {
			tty_putcode(tty, TTYC_EL);
			if (i != screen_size_y(s) - 1) {
				tty_emulate_repeat(tty, TTYC_CUD, TTYC_CUD1, 1);
				tty->cy++;
			}
		}
	} else {
		for (j = 0; j < screen_size_y(s); j++) {
			tty_cursor(tty, 0, j, wp->xoff, wp->yoff);
			for (i = 0; i < screen_size_x(s); i++)
				tty_putc(tty, ' ');
		}
	}
}

int
window_copy_update_selection(struct window_pane *wp)
{
	struct window_copy_mode_data	*data = wp->modedata;
	struct screen			*s = &data->screen;
	struct options			*oo = &wp->window->options;
	struct grid_cell		 gc;
	u_int				 sx, sy, ty, cy;

	if (!s->sel.flag)
		return (0);

	/* Set colours. */
	memcpy(&gc, &grid_default_cell, sizeof gc);
	colour_set_fg(&gc, options_get_number(oo, "mode-fg"));
	colour_set_bg(&gc, options_get_number(oo, "mode-bg"));
	gc.attr |= options_get_number(oo, "mode-attr");

	/* Find top of screen. */
	ty = screen_hsize(&wp->base) - data->oy;

	/* Adjust the selection. */
	sx = data->selx;
	sy = data->sely;
	if (sy < ty) {					/* above screen */
		if (!data->rectflag)
			sx = 0;
		sy = 0;
	} else if (sy > ty + screen_size_y(s) - 1) {	/* below screen */
		if (!data->rectflag)
			sx = screen_size_x(s) - 1;
		sy = screen_size_y(s) - 1;
	} else
		sy -= ty;
	sy = screen_hsize(s) + sy;

	screen_set_selection(s,
	    sx, sy, data->cx, screen_hsize(s) + data->cy, data->rectflag, &gc);

	if (data->rectflag) {
		/*
		 * Can't rely on the caller to redraw the right lines for
		 * rectangle selection - find the highest line and the number
		 * of lines, and redraw just past that in both directions
		 */
		cy = data->cy;
		if (sy < cy)
			window_copy_redraw_lines(wp, sy, cy - sy + 1);
		else
			window_copy_redraw_lines(wp, cy, sy - cy + 1);
	}

	return (1);
}

struct screen *
window_copy_init(struct window_pane *wp)
{
	struct window_copy_mode_data	*data;
	struct screen			*s;
	struct screen_write_ctx	 	 ctx;
	u_int				 i;
	int				 keys;

	wp->modedata = data = xmalloc(sizeof *data);
	data->oy = 0;
	data->cx = wp->base.cx;
	data->cy = wp->base.cy;

	data->lastcx = 0;
	data->lastsx = 0;

	data->rectflag = 0;

	data->inputtype = WINDOW_COPY_OFF;
	data->inputprompt = NULL;
	data->inputstr = xstrdup("");
	data->numprefix = 0;

	data->searchtype = WINDOW_COPY_OFF;
	data->searchstr = NULL;

	wp->flags |= PANE_FREEZE;
	bufferevent_disable(wp->event, EV_READ|EV_WRITE);

	s = &data->screen;
	screen_init(s, screen_size_x(&wp->base), screen_size_y(&wp->base), 0);
	if (options_get_number(&wp->window->options, "mode-mouse"))
		s->mode |= MODE_MOUSE;

	keys = options_get_number(&wp->window->options, "mode-keys");
	if (keys == MODEKEY_EMACS)
		mode_key_init(&data->mdata, &mode_key_tree_emacs_copy);
	else
		mode_key_init(&data->mdata, &mode_key_tree_vi_copy);

	s->cx = data->cx;
	s->cy = data->cy;

	screen_write_start(&ctx, NULL, s);
	for (i = 0; i < screen_size_y(s); i++)
		window_copy_write_line(wp, &ctx, i);
	screen_write_cursormove(&ctx, data->cx, data->cy);
	screen_write_stop(&ctx);

	return (s);
}

/* Move cursor to px,py. */
void
screen_write_cursormove(struct screen_write_ctx *ctx, u_int px, u_int py)
{
	struct screen	*s = ctx->s;

	if (px > screen_size_x(s) - 1)
		px = screen_size_x(s) - 1;
	if (py > screen_size_y(s) - 1)
		py = screen_size_y(s) - 1;

	s->cx = px;
	s->cy = py;
}

void
window_copy_scroll_down(struct window_pane *wp, u_int ny)
{
	struct window_copy_mode_data	*data = wp->modedata;
	struct screen			*s = &data->screen;
	struct screen_write_ctx		 ctx;

	if (ny > screen_hsize(&wp->base))
		return;

	if (data->oy > screen_hsize(&wp->base) - ny)
		ny = screen_hsize(&wp->base) - data->oy;
	if (ny == 0)
		return;
	data->oy += ny;

	screen_write_start(&ctx, wp, NULL);
	screen_write_cursormove(&ctx, 0, 0);
	screen_write_insertline(&ctx, ny);
	window_copy_write_lines(wp, &ctx, 0, ny);
	if (s->sel.flag && screen_size_y(s) > ny) {
		window_copy_update_selection(wp);
		window_copy_write_line(wp, &ctx, ny);
	} else if (ny == 1) /* nuke position */
		window_copy_write_line(wp, &ctx, 1);
	screen_write_cursormove(&ctx, data->cx, data->cy);
	window_copy_update_selection(wp);
	screen_write_stop(&ctx);
}

/* Resize screen. */
void
screen_resize(struct screen *s, u_int sx, u_int sy, int reflow)
{
	if (sx < 1)
		sx = 1;
	if (sy < 1)
		sy = 1;

	if (sx != screen_size_x(s)) {
		screen_resize_x(s, sx);

		/*
		 * It is unclear what should happen to tabs on resize. xterm
		 * seems to try and maintain them, rxvt resets them. Resetting
		 * is simpler and more reliable so let's do that.
		 */
		screen_reset_tabs(s);
	}

	if (sy != screen_size_y(s))
		screen_resize_y(s, sy);

	if (reflow)
		screen_reflow(s, sx);
}

/* Line feed. */
void
screen_write_linefeed(struct screen_write_ctx *ctx, int wrapped)
{
	struct screen		*s = ctx->s;
	struct grid_line	*gl;
	struct tty_ctx	 	 ttyctx;
	u_int			 sx = screen_size_x(s), sy = screen_size_y(s);

	screen_write_initctx(ctx, &ttyctx);

	gl = &s->grid->linedata[s->grid->hsize + s->cy];
	if (wrapped)
		gl->flags |= GRID_LINE_WRAPPED;
	else
		gl->flags &= ~GRID_LINE_WRAPPED;

	if (s->cy == s->rlower) {
		screen_dirty_clear(s, 0, s->rupper, sx - 1, s->rupper);
		screen_write_flush(ctx);
		grid_view_scroll_region_up(s->grid, s->rupper, s->rlower);
	} else if (s->cy < sy - 1)
		s->cy++;

	ttyctx.num = wrapped;
	tty_write(tty_cmd_linefeed, &ttyctx);
}

void
window_copy_redraw_screen(struct window_pane *wp)
{
	struct window_copy_mode_data	*data = wp->modedata;

	window_copy_redraw_lines(wp, 0, screen_size_y(&data->screen));
}

/*
 * Is the region large enough to be worth redrawing once later rather than
 * probably several times now? Currently yes if it is more than 50% of the
 * pane.
 */
int
tty_large_region(unused struct tty *tty, const struct tty_ctx *ctx)
{
	struct window_pane	*wp = ctx->wp;

	return (ctx->orlower - ctx->orupper >= screen_size_y(wp->screen) / 2);
}

void
window_copy_cursor_down(struct window_pane *wp, int scroll_only)
{
	struct window_copy_mode_data	*data = wp->modedata;
	struct screen			*s = &data->screen;
	u_int				 ox, oy, px, py;

	oy = screen_hsize(&wp->base) + data->cy - data->oy;
	ox = window_copy_find_length(wp, oy);
	if (ox != 0) {
		data->lastcx = data->cx;
		data->lastsx = ox;
	}

	data->cx = data->lastcx;
	if (scroll_only || data->cy == screen_size_y(s) - 1) {
		window_copy_scroll_up(wp, 1);
		if (scroll_only && data->cy > 0)
			window_copy_redraw_lines(wp, data->cy - 1, 2);
	} else {
		window_copy_update_cursor(wp, data->cx, data->cy + 1);
		if (window_copy_update_selection(wp))
			window_copy_redraw_lines(wp, data->cy - 1, 2);
	}

	if (!data->screen.sel.flag || !data->rectflag) {
		py = screen_hsize(&wp->base) + data->cy - data->oy;
		px = window_copy_find_length(wp, py);
		if ((data->cx >= data->lastsx && data->cx != px) ||
		    data->cx > px)
			window_copy_cursor_end_of_line(wp);
	}
}