/* $OpenBSD$ */

/*
* Copyright (c) 2009 Tiago Cunha <[email protected]>
*
* 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 <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include "tmux.h"

/*
* Loads a paste buffer from a file.
*/

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

const struct cmd_entry cmd_load_buffer_entry = {
       .name = "load-buffer",
       .alias = "loadb",

       .args = { "b:t:w", 1, 1, NULL },
       .usage = CMD_BUFFER_USAGE " " CMD_TARGET_CLIENT_USAGE " path",

       .flags = CMD_AFTERHOOK|CMD_CLIENT_TFLAG|CMD_CLIENT_CANFAIL,
       .exec = cmd_load_buffer_exec
};

struct cmd_load_buffer_data {
       struct client           *client;
       struct cmdq_item        *item;
       char                    *name;
};

static void
cmd_load_buffer_done(__unused struct client *c, const char *path, int error,
   int closed, struct evbuffer *buffer, void *data)
{
       struct cmd_load_buffer_data     *cdata = data;
       struct client                   *tc = cdata->client;
       struct cmdq_item                *item = cdata->item;
       void                            *bdata = EVBUFFER_DATA(buffer);
       size_t                           bsize = EVBUFFER_LENGTH(buffer);
       void                            *copy;
       char                            *cause;

       if (!closed)
               return;

       if (error != 0)
               cmdq_error(item, "%s: %s", path, strerror(error));
       else if (bsize != 0) {
               copy = xmalloc(bsize);
               memcpy(copy, bdata, bsize);
               if (paste_set(copy, bsize, cdata->name, &cause) != 0) {
                       cmdq_error(item, "%s", cause);
                       free(cause);
                       free(copy);
               } else if (tc != NULL &&
                   tc->session != NULL &&
                   (~tc->flags & CLIENT_DEAD))
                       tty_set_selection(&tc->tty, "", copy, bsize);
               if (tc != NULL)
                       server_client_unref(tc);
       }
       cmdq_continue(item);

       free(cdata->name);
       free(cdata);
}

static enum cmd_retval
cmd_load_buffer_exec(struct cmd *self, struct cmdq_item *item)
{
       struct args                     *args = cmd_get_args(self);
       struct client                   *tc = cmdq_get_target_client(item);
       struct cmd_load_buffer_data     *cdata;
       const char                      *bufname = args_get(args, 'b');
       char                            *path;

       cdata = xcalloc(1, sizeof *cdata);
       cdata->item = item;
       if (bufname != NULL)
               cdata->name = xstrdup(bufname);
       if (args_has(args, 'w') && tc != NULL) {
               cdata->client = tc;
               cdata->client->references++;
       }

       path = format_single_from_target(item, args_string(args, 0));
       file_read(cmdq_get_client(item), path, cmd_load_buffer_done, cdata);
       free(path);

       return (CMD_RETURN_WAIT);
}