path: root/screen-write.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_initctx(struct screen_write_ctx *,
		    struct tty_ctx *);
static void	screen_write_collect_clear(struct screen_write_ctx *, 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);

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 = {
	GRID_FLAG_PADDING, 0, 8, 8, { { 0 }, 0, 0, 0 }
};

struct screen_write_collect_item {
	u_int			 x;

	u_int			 used;
	char			 data[256];

	struct grid_cell	 gc;

	TAILQ_ENTRY (screen_write_collect_item) entry;
};
struct screen_write_collect_line {
	TAILQ_HEAD(, screen_write_collect_item) items;
};

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

	memset(ctx, 0, sizeof *ctx);

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

	ctx->list = xcalloc(screen_size_y(ctx->s), sizeof *ctx->list);
	for (y = 0; y < screen_size_y(ctx->s); y++)
		TAILQ_INIT(&ctx->list[y].items);
	ctx->item = xcalloc(1, sizeof *ctx->item);

	if (wp != NULL)
		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), wp == NULL ? "no pane" : tmp);
}

/* Finish writing. */
void
screen_write_stop(struct screen_write_ctx *ctx)
{
	screen_write_collect_end(ctx);
	screen_write_collect_flush(ctx, 0);

	log_debug("%s: %u cells (%u written, %u skipped)", __func__,
	    ctx->cells, ctx->written, ctx->skipped);

	free(ctx->item);
	free(ctx->list); /* flush will have emptied */
}

/* 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_INSERT|MODE_KCURSOR|MODE_KKEYPAD|MODE_FOCUSON);
	s->mode &= ~(ALL_MOUSE_MODES|MODE_MOUSE_UTF8|MODE_MOUSE_SGR);

	screen_write_clearscreen(ctx, 8);
	screen_write_cursormove(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(&</