/* $OpenBSD$ */

/*
* Copyright (c) 2009 Nicholas Marriott <[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 <stdlib.h>
#include <string.h>
#include <unistd.h>

#include "tmux.h"

/*
* Split a window (add a new pane).
*/

#define SPLIT_WINDOW_TEMPLATE "#{session_name}:#{window_index}.#{pane_index}"

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

const struct cmd_entry cmd_split_window_entry = {
       .name = "split-window",
       .alias = "splitw",

       .args = { "bc:de:fF:hIl:p:Pt:vZ", 0, -1, NULL },
       .usage = "[-bdefhIPvZ] [-c start-directory] [-e environment] "
                "[-F format] [-l size] " CMD_TARGET_PANE_USAGE
                "[shell-command]",

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

       .flags = 0,
       .exec = cmd_split_window_exec
};

static enum cmd_retval
cmd_split_window_exec(struct cmd *self, struct cmdq_item *item)
{
       struct args             *args = cmd_get_args(self);
       struct cmd_find_state   *current = cmdq_get_current(item);
       struct cmd_find_state   *target = cmdq_get_target(item);
       struct spawn_context     sc = { 0 };
       struct client           *tc = cmdq_get_target_client(item);
       struct session          *s = target->s;
       struct winlink          *wl = target->wl;
       struct window           *w = wl->window;
       struct window_pane      *wp = target->wp, *new_wp;
       enum layout_type         type;
       struct layout_cell      *lc;
       struct cmd_find_state    fs;
       int                      size, flags, input;
       const char              *template;
       char                    *cause = NULL, *cp;
       struct args_value       *av;
       u_int                    count = args_count(args), curval = 0;

       type = LAYOUT_TOPBOTTOM;
       if (args_has(args, 'h'))
               type = LAYOUT_LEFTRIGHT;

       /* If the 'p' flag is dropped then this bit can be moved into 'l'. */
       if (args_has(args, 'l') || args_has(args, 'p')) {
               if (args_has(args, 'f')) {
                       if (type == LAYOUT_TOPBOTTOM)
                               curval = w->sy;
                       else
                               curval = w->sx;
               } else {
                       if (type == LAYOUT_TOPBOTTOM)
                               curval = wp->sy;
                       else
                               curval = wp->sx;
               }
       }

       size = -1;
       if (args_has(args, 'l')) {
               size = args_percentage_and_expand(args, 'l', 0, INT_MAX, curval,
                   item, &cause);
       } else if (args_has(args, 'p')) {
               size = args_strtonum_and_expand(args, 'p', 0, 100, item,
                   &cause);
               if (cause == NULL)
                       size = curval * size / 100;
       }
       if (cause != NULL) {
               cmdq_error(item, "size %s", cause);
               free(cause);
               return (CMD_RETURN_ERROR);
       }

       window_push_zoom(wp->window, 1, args_has(args, 'Z'));
       input = (args_has(args, 'I') && count == 0);

       flags = 0;
       if (args_has(args, 'b'))
               flags |= SPAWN_BEFORE;
       if (args_has(args, 'f'))
               flags |= SPAWN_FULLSIZE;
       if (input || (count == 1 && *args_string(args, 0) == '\0'))
               flags |= SPAWN_EMPTY;

       lc = layout_split_pane(wp, type, size, flags);
       if (lc == NULL) {
               cmdq_error(item, "no space for new pane");
               return (CMD_RETURN_ERROR);
       }

       sc.item = item;
       sc.s = s;
       sc.wl = wl;

       sc.wp0 = wp;
       sc.lc = lc;

       args_to_vector(args, &sc.argc, &sc.argv);
       sc.environ = environ_create();

       av = args_first_value(args, 'e');
       while (av != NULL) {
               environ_put(sc.environ, av->string, 0);
               av = args_next_value(av);
       }

       sc.idx = -1;
       sc.cwd = args_get(args, 'c');

       sc.flags = flags;
       if (args_has(args, 'd'))
               sc.flags |= SPAWN_DETACHED;
       if (args_has(args, 'Z'))
               sc.flags |= SPAWN_ZOOM;

       if ((new_wp = spawn_pane(&sc, &cause)) == NULL) {
               cmdq_error(item, "create pane failed: %s", cause);
               free(cause);
               if (sc.argv != NULL)
                       cmd_free_argv(sc.argc, sc.argv);
               environ_free(sc.environ);
               return (CMD_RETURN_ERROR);
       }
       if (input) {
               switch (window_pane_start_input(new_wp, item, &cause)) {
               case -1:
                       server_client_remove_pane(new_wp);
                       layout_close_pane(new_wp);
                       window_remove_pane(wp->window, new_wp);
                       cmdq_error(item, "%s", cause);
                       free(cause);
                       if (sc.argv != NULL)
                               cmd_free_argv(sc.argc, sc.argv);
                       environ_free(sc.environ);
                       return (CMD_RETURN_ERROR);
               case 1:
                       input = 0;
                       break;
               }
       }
       if (!args_has(args, 'd'))
               cmd_find_from_winlink_pane(current, wl, new_wp, 0);
       window_pop_zoom(wp->window);
       server_redraw_window(wp->window);
       server_status_session(s);

       if (args_has(args, 'P')) {
               if ((template = args_get(args, 'F')) == NULL)
                       template = SPLIT_WINDOW_TEMPLATE;
               cp = format_single(item, template, tc, s, wl, new_wp);
               cmdq_print(item, "%s", cp);
               free(cp);
       }

       cmd_find_from_winlink_pane(&fs, wl, new_wp, 0);
       cmdq_insert_hook(s, item, &fs, "after-split-window");

       if (sc.argv != NULL)
               cmd_free_argv(sc.argc, sc.argv);
       environ_free(sc.environ);
       if (input)
               return (CMD_RETURN_WAIT);
       return (CMD_RETURN_NORMAL);
}

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