/* $OpenBSD: cmd-paste-buffer.c,v 1.44 2026/03/04 07:19:32 tb Exp $ */

/*
 * 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 <vis.h>

#include "tmux.h"

/*
 * Paste paste buffer if present.
 */

static enum cmd_retval  cmd_paste_buffer_exec(struct cmd *, struct cmdq_item *);

const struct cmd_entry cmd_paste_buffer_entry = {
        .name = "paste-buffer",
        .alias = "pasteb",

        .args = { "db:prSs:t:", 0, 0, NULL },
        .usage = "[-dprS] [-s separator] " CMD_BUFFER_USAGE " "
                 CMD_TARGET_PANE_USAGE,

        .target = { 't', CMD_FIND_PANE, 0 },

        .flags = CMD_AFTERHOOK,
        .exec = cmd_paste_buffer_exec
};

static void
cmd_paste_buffer_paste(struct window_pane *wp, const char *buf, size_t len)
{
        char    *cp;
        size_t   n;

        n = utf8_stravisx(&cp, buf, len, VIS_SAFE|VIS_NOSLASH);
        bufferevent_write(wp->event, cp, n);
        free(cp);
}

static enum cmd_retval
cmd_paste_buffer_exec(struct cmd *self, struct cmdq_item *item)
{
        struct args             *args = cmd_get_args(self);
        struct cmd_find_state   *target = cmdq_get_target(item);
        struct window_pane      *wp = target->wp;
        struct paste_buffer     *pb;
        const char              *sepstr, *bufname, *bufdata, *bufend, *line;
        size_t                   seplen, bufsize, len;
        int                      bracket = args_has(args, 'p');

        if (window_pane_exited(wp)) {
                cmdq_error(item, "target pane has exited");
                return (CMD_RETURN_ERROR);
        }

        bufname = NULL;
        if (args_has(args, 'b'))
                bufname = args_get(args, 'b');

        if (bufname == NULL)
                pb = paste_get_top(NULL);
        else {
                pb = paste_get_name(bufname);
                if (pb == NULL) {
                        cmdq_error(item, "no buffer %s", bufname);
                        return (CMD_RETURN_ERROR);
                }
        }

        if (pb != NULL && ~wp->flags & PANE_INPUTOFF) {
                sepstr = args_get(args, 's');
                if (sepstr == NULL) {
                        if (args_has(args, 'r'))
                                sepstr = "\n";
                        else
                                sepstr = "\r";
                }
                seplen = strlen(sepstr);

                if (bracket && (wp->screen->mode & MODE_BRACKETPASTE))
                        bufferevent_write(wp->event, "\033[200~", 6);

                bufdata = paste_buffer_data(pb, &bufsize);
                bufend = bufdata + bufsize;

                for (;;) {
                        line = memchr(bufdata, '\n', bufend - bufdata);
                        if (line == NULL)
                                break;
                        len = line - bufdata;
                        if (args_has(args, 'S'))
                                bufferevent_write(wp->event, bufdata, len);
                        else
                                cmd_paste_buffer_paste(wp, bufdata, len);
                        bufferevent_write(wp->event, sepstr, seplen);

                        bufdata = line + 1;
                }
                if (bufdata != bufend) {
                        len = bufend - bufdata;
                        if (args_has(args, 'S'))
                                bufferevent_write(wp->event, bufdata, len);
                        else
                                cmd_paste_buffer_paste(wp, bufdata, len);
                }

                if (bracket && (wp->screen->mode & MODE_BRACKETPASTE))
                        bufferevent_write(wp->event, "\033[201~", 6);
        }

        if (pb != NULL && args_has(args, 'd'))
                paste_free(pb);

        return (CMD_RETURN_NORMAL);
}