path: root/screen-write.c

/* $OpenBSD$ */

/*
 * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
 *
 * 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 <string.h>

#include "tmux.h"

void	screen_write_initctx(struct screen_write_ctx *, struct tty_ctx *);
void	screen_write_overwrite(struct screen_write_ctx *);

/* Initialise writing with a window. */
void
screen_write_start(
    struct screen_write_ctx *ctx, struct window_pane *wp, struct screen *s)
{
	ctx->wp = wp;
	if (wp != NULL && s == NULL)
		ctx->s = wp->screen;
	else
		ctx->s = s;
}

/* Finish writing. */
void
screen_write_stop(unused struct screen_write_ctx *ctx)
{
}

/* Write character. */
void
screen_write_putc(
    struct screen_write_ctx *ctx, struct grid_cell *gc, u_char ch)
{
	gc->data = ch;
	screen_write_cell(ctx, gc, NULL);
}

/* Calculate string length, with embedded formatting. */
size_t printflike2
screen_write_cstrlen(int utf8flag, const char *fmt, ...)
{
	va_list	ap;
	char   *msg, *msg2, *ptr, *ptr2;
	size_t	size;

	va_start(ap, fmt);
	xvasprintf(&msg, fmt, ap);
	va_end(ap);
	msg2 = xmalloc(strlen(msg) + 1);

	ptr = msg;
	ptr2 = msg2;
	while (*ptr != '\0') {
		if (ptr[0] == '#' && ptr[1] == '[') {
			while (*ptr != ']' && *ptr != '\0')
				ptr++;
			if (*ptr == ']')
				ptr++;
			continue;
		}
		*ptr2++ = *ptr++;
	}
	*ptr2 = '\0';

	size = screen_write_strlen(utf8flag, "%s", msg2);

	xfree(msg);
	xfree(msg2);

	return (size);
}

/* Calculate string length. */
size_t printflike2
screen_write_strlen(int utf8flag, const char *fmt, ...)
{
	va_list	ap;
	char   *msg;
	u_char *ptr, utf8buf[4];
	size_t	left, size = 0;

	va_start(ap, fmt);
	xvasprintf(&msg, fmt, ap);
	va_end(ap);

	ptr = msg;
	while (*ptr != '\0') {
		if (utf8flag && *ptr > 0x7f) {
			memset(utf8buf, 0xff, sizeof utf8buf);

			left = strlen(ptr);
			if (*ptr >= 0xc2 && *ptr <= 0xdf && left >= 2) {
				memcpy(utf8buf, ptr, 2);
				ptr += 2;
			} else if (*ptr >= 0xe0 && *ptr <= 0xef && left >= 3) {
				memcpy(utf8buf, ptr, 3);
				ptr += 3;
			} else if (*ptr >= 0xf0 && *ptr <= 0xf4 && left >= 4) {
				memcpy(utf8buf, ptr, 4);
				ptr += 4;
			} else {
				*utf8buf = *ptr;
				ptr++;
			}
			size += utf8_width(utf8buf)