/* $OpenBSD: window-client.c,v 1.47 2026/07/14 17:17:18 nicm Exp $ */

/*

 * Copyright (c) 2017 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 <sys/time.h>

#include <stdlib.h>

#include <string.h>

#include <time.h>

#include "tmux.h"

static struct screen  *window_client_init(struct window_mode_entry *,

           struct cmdq_item *, struct cmd_find_state *,

           struct args *);

static void    window_client_free(struct window_mode_entry *);

static void    window_client_resize(struct window_mode_entry *, u_int,

           u_int);

static void    window_client_update(struct window_mode_entry *);

static void    window_client_key(struct window_mode_entry *,

           struct client *, struct session *,

           struct winlink *, key_code, struct mouse_event *);

#define WINDOW_CLIENT_DEFAULT_COMMAND "detach-client -t '%%'"

#define WINDOW_CLIENT_DEFAULT_FORMAT \

  "#[fg=themelightgrey]#{t/p:client_activity}: session #[default]#{session_name}"

#define WINDOW_CLIENT_DEFAULT_KEY_FORMAT \

  "#{?#{e|<:#{line},10}," \

    "#{line}" \

  ",#{e|<:#{line},36}," \

    "M-#{a:#{e|+:97,#{e|-:#{line},10}}}" \

  "}"

#define WINDOW_CLIENT_FEATURE(f) \

  "#{?#{I/f:" #f "}," \

  "#[fg=themegreen],#[fg=themelightgrey]}#{p/15:#{l:" #f "}}" \

  "#[default]"

static const char *window_client_info_lines[] = {

  "#[fg=themelightgrey]Client Name   #[#{E:tree-mode-border-style},acs]x#[default] "

  "#{client_name} #[fg=themelightgrey]"

  "#[fg=themelightgrey](PID #{client_pid})#[default]",

  "#[fg=themelightgrey]Session       #[#{E:tree-mode-border-style},acs]x#[default] "

  "#{session_name}",

  "#[fg=themelightgrey]Attach Time   #[#{E:tree-mode-border-style},acs]x#[default] "

  "#{t:client_created} "

  "#[fg=themelightgrey](#{t/r:client_created})#[default]",

  "#[fg=themelightgrey]Activity Time #[#{E:tree-mode-border-style},acs]x#[default] "

  "#{t:client_activity} "

  "#[fg=themelightgrey](#{t/r:client_activity})#[default]",

  "#[fg=themelightgrey]Terminal Type #[#{E:tree-mode-border-style},acs]x#[default] "

  "#{?client_termtype,#{client_termtype},Unknown}",

  "#[fg=themelightgrey]TERM          #[#{E:tree-mode-border-style},acs]x#[default] "

  "#{client_termname}",

  "#[fg=themelightgrey]Size          #[#{E:tree-mode-border-style},acs]x#[default] "

  "#{client_width}x#{client_height} "

  "#[fg=themelightgrey](cell #{client_cell_width}x"

  "#{client_cell_height})#[default]",

  "#[fg=themelightgrey]Bytes Written #[#{E:tree-mode-border-style},acs]x#[default] "

  "#{client_written} "

  "#[fg=themelightgrey](#{client_discarded} discarded)#[default]",

  "#[fg=themelightgrey]Features      #[#{E:tree-mode-border-style},acs]x#[default] "

  WINDOW_CLIENT_FEATURE(256) " "

  WINDOW_CLIENT_FEATURE(RGB) " "

  WINDOW_CLIENT_FEATURE(bpaste) " "

  WINDOW_CLIENT_FEATURE(ccolour),

  "              #[#{E:tree-mode-border-style},acs]x#[default] "

  WINDOW_CLIENT_FEATURE(clipboard) " "

  WINDOW_CLIENT_FEATURE(cstyle) " "

  WINDOW_CLIENT_FEATURE(extkeys) " "

  WINDOW_CLIENT_FEATURE(focus),

  "              #[#{E:tree-mode-border-style},acs]x#[default] "

  WINDOW_CLIENT_FEATURE(hyperlinks) " "

  WINDOW_CLIENT_FEATURE(ignorefkeys) " "

  WINDOW_CLIENT_FEATURE(margins) " "

  WINDOW_CLIENT_FEATURE(mouse),

  "              #[#{E:tree-mode-border-style},acs]x#[default] "

  WINDOW_CLIENT_FEATURE(osc7) " "

  WINDOW_CLIENT_FEATURE(overline) " "

  WINDOW_CLIENT_FEATURE(progressbar) " "

  WINDOW_CLIENT_FEATURE(rectfill),

  "              #[#{E:tree-mode-border-style},acs]x#[default] "

  WINDOW_CLIENT_FEATURE(sixel) " "

  WINDOW_CLIENT_FEATURE(strikethrough) " "

  WINDOW_CLIENT_FEATURE(sync) " "

  WINDOW_CLIENT_FEATURE(title),

  "              #[#{E:tree-mode-border-style},acs]x#[default] "

  WINDOW_CLIENT_FEATURE(usstyle),

  "#[#{E:tree-mode-border-style},acs]qqqqqqqqqqqqqqn#{R:q,#{window_width}}#[default]",

  "#[fg=themelightgrey]prefix        #[#{E:tree-mode-border-style},acs]x#[default] "

  "#{prefix}",

  "#[fg=themelightgrey]mouse         #[#{E:tree-mode-border-style},acs]x#[default] "

  "#{?mouse,#{?#{I/c:kmous},,#[fg=themered]}on,#[fg=themelightgrey]off} "

  "#{?#{I/c:kmous},,#[align=right]unavailable: [kmous] missing}",

  "#[fg=themelightgrey]set-clipboard #[#{E:tree-mode-border-style},acs]x#[default] "

  "#{?#{!=:#{set-clipboard},off},#{?#{I/f:clipboard},,"

  "#[fg=themered]}#{set-clipboard},#[fg=themelightgrey]off} "

  "#{?#{I/f:clipboard},,#[align=right]unavailable: [Ms] missing}",

  "#[fg=themelightgrey]get-clipboard #[#{E:tree-mode-border-style},acs]x#[default] "

  "#{?#{!=:#{get-clipboard},off},#{?#{I/f:clipboard},,"

  "#[fg=themered]}#{get-clipboard},#[fg=themelightgrey]off} "

  "#{?#{I/f:clipboard},,#[align=right]unavailable: [Ms] missing}",

  "#[fg=themelightgrey]focus-events  #[#{E:tree-mode-border-style},acs]x#[default] "

  "#{?focus-events,#{?#{I/f:focus},,#[fg=themered]}on,#[fg=themelightgrey]off} "

  "#{?#{I/f:focus},,#[align=right]unavailable: [Enfcs] or [Dcfcs] missing}",

  "#[fg=themelightgrey]extended-keys #[#{E:tree-mode-border-style},acs]x#[default] "

  "#{?#{!=:#{extended-keys},off},#{?#{I/f:extkeys},,"

  "#[fg=themered]}#{extended-keys},#[fg=themelightgrey]off} "

  "#{?#{I/f:extkeys},,#[align=right]unavailable: [Eneks] or [Dseks] missing}",

  "#[fg=themelightgrey]set-titles    #[#{E:tree-mode-border-style},acs]x#[default] "

  "#{?set-titles,on,#[fg=themelightgrey]off}",

  "#[fg=themelightgrey]escape-time   #[#{E:tree-mode-border-style},acs]x#[default] "

  "#{escape-time} ms",

};

static const struct menu_item window_client_menu_items[] = {

  { "Detach", 'd', NULL },

  { "Detach Tagged", 'D', NULL },

  { "", KEYC_NONE, NULL },

  { "Tag", 't', NULL },

  { "Tag All", '\024', NULL },

  { "Tag None", 'T', NULL },

  { "", KEYC_NONE, NULL },

  { "Cancel", 'q', NULL },

  { NULL, KEYC_NONE, NULL }

};

const struct window_mode window_client_mode = {

  .name = "client-mode",

  .default_format = WINDOW_CLIENT_DEFAULT_FORMAT,

  .init = window_client_init,

  .free = window_client_free,

  .resize = window_client_resize,

  .update = window_client_update,

  .key = window_client_key,

};

struct window_client_itemdata {

  struct client *c;

  char    *ttyname;

};

struct window_client_modedata {

  struct window_pane     *wp;

  struct mode_tree_data    *data;

  char         *format;

  char         *key_format;

  char         *command;

  int         hide_preview_this_pane;

  int         preview_is_info;

  struct window_client_itemdata **item_list;

  u_int         item_size;

};

static enum sort_order window_client_order_seq[] = {

  SORT_NAME,

  SORT_SIZE,

  SORT_CREATION,

  SORT_ACTIVITY,

  SORT_END,

};

static struct window_client_itemdata *

window_client_add_item(struct window_client_modedata *data)

{

  struct window_client_itemdata *item;

  data->item_list = xreallocarray(data->item_list, data->item_size + 1,

      sizeof *data->item_list);

  item = data->item_list[data->item_size++] = xcalloc(1, sizeof *item);

  return (item);

}

static void

window_client_free_item(struct window_client_itemdata *item)

{

  server_client_unref(item->c);

  free(item->ttyname);

  free(item);

}

static void

window_client_build(void *modedata, struct sort_criteria *sort_crit,

    __unused uint64_t *tag, const char *filter)

{

  struct window_client_modedata *data = modedata;

  struct window_client_itemdata *item;

  u_int        i, n;

  struct client     *c, **l;

  char        *text, *cp;

  for (i = 0; i < data->item_size; i++)

    window_client_free_item(data->item_list[i]);

  free(data->item_list);

  data->item_list = NULL;

  data->item_size = 0;

  l = sort_get_clients(&n, sort_crit);

  for (i = 0; i < n; i++) {

    if (l[i]->session == NULL ||

        (l[i]->flags & CLIENT_UNATTACHEDFLAGS))

      continue;

    item = window_client_add_item(data);

    item->c = l[i];

    item->ttyname = xstrdup(l[i]->ttyname);

    l[i]->references++;

  }

  for (i = 0; i < data->item_size; i++) {

    item = data->item_list[i];

    c = item->c;

    if (filter != NULL) {

      cp = format_single(NULL, filter, c, NULL, NULL, NULL);

      if (!format_true(cp)) {

        free(cp);

        continue;

      }

      free(cp);

    }

    text = format_single(NULL, data->format, c, NULL, NULL, NULL);

    mode_tree_add(data->data, NULL, item, (uint64_t)c, c->name,

        text, -1);

    free(text);

  }

}

static void

window_client_draw_info(__unused void *modedata, void *itemdata,

    struct screen_write_ctx *ctx, u_int sx, u_int sy)

{

  struct window_client_itemdata *item = itemdata;

  struct client     *c = item->c;

  struct screen     *s = ctx->s;

  struct window     *w = c->session->curw->window;

  struct grid_cell     gc;

  u_int        cx = s->cx, cy = s->cy, i;

  struct format_tree    *ft;

  char        *expanded;

  ft = format_create_defaults(NULL, c, NULL, NULL, NULL);

  screen_write_cursormove(ctx, cx, cy, 0);

  for (i = 0; i < nitems(window_client_info_lines); i++) {

    if (i == sy)

      break;

    expanded = format_expand(ft, window_client_info_lines[i]);

    screen_write_cursormove(ctx, cx, cy + i, 0);

    format_draw(ctx, &grid_default_cell, sx, expanded, NULL, 0);

    free(expanded);

  }

  if (sx > 14 && i < sy) {

    memcpy(&gc, &grid_default_cell, sizeof gc);

    style_apply(&gc, w->options, "tree-mode-border-style", NULL);

    screen_write_cursormove(ctx, cx + 14, cy + i, 0);

    screen_write_vline(ctx, sy - i, 0, 0, &gc);

  }

  format_free(ft);

}

static void

window_client_draw(void *modedata, void *itemdata,

    struct screen_write_ctx *ctx, u_int sx, u_int sy)

{

  struct window_client_modedata *data = modedata;

  struct window_client_itemdata *item = itemdata;

  struct client     *c = item->c;

  struct session      *session = c->session;

  struct screen     *s = ctx->s;

  struct window     *w;

  struct window_pane    *wp;

  struct grid_cell     gc;

  u_int        cx = s->cx, cy = s->cy, lines, at;

  if (session == NULL || (c->flags & CLIENT_UNATTACHEDFLAGS))

    return;

  if (data->preview_is_info) {

    window_client_draw_info(modedata, itemdata, ctx, sx, sy);

    return;

  }

  w = session->curw->window;

  wp = w->active;

  if (data->hide_preview_this_pane && wp == data->wp) {

    if (!TAILQ_EMPTY(&w->last_panes))

      wp = TAILQ_FIRST(&w->last_panes);

    else

      wp = NULL;

  }

  lines = status_line_size(c);

  if (lines >= sy)

    lines = 0;

  if (status_at_line(c) == 0)

    at = lines;

  else

    at = 0;

  screen_write_cursormove(ctx, cx, cy + at, 0);

  if (wp != NULL)

    screen_write_preview(ctx, &wp->base, sx, sy - 2 - lines);

  if (at != 0)

    screen_write_cursormove(ctx, cx, cy + 2, 0);

  else

    screen_write_cursormove(ctx, cx, cy + sy - 1 - lines, 0);

  memcpy(&gc, &grid_default_cell, sizeof gc);

  style_apply(&gc, w->options, "tree-mode-border-style", NULL);

  screen_write_hline(ctx, sx, 0, 0, BOX_LINES_DEFAULT, &gc);

  if (at != 0)

    screen_write_cursormove(ctx, cx, cy, 0);

  else

    screen_write_cursormove(ctx, cx, cy + sy - lines, 0);

  screen_write_fast_copy(ctx, &c->status.screen, 0, 0, sx, lines);

}

static void

window_client_menu(void *modedata, struct client *c, key_code key)

{

  struct window_client_modedata *data = modedata;

  struct window_pane    *wp = data->wp;

  struct window_mode_entry  *wme;

  wme = TAILQ_FIRST(&wp->modes);

  if (wme == NULL || wme->data != modedata)

    return;

  window_client_key(wme, c, NULL, NULL, key, NULL);

}

static key_code

window_client_get_key(void *modedata, void *itemdata, u_int line)

{

  struct window_client_modedata *data = modedata;

  struct window_client_itemdata *item = itemdata;

  struct format_tree    *ft;

  char        *expanded;

  key_code       key;

  ft = format_create(NULL, NULL, FORMAT_NONE, 0);

  format_defaults(ft, item->c, NULL, 0, NULL);

  format_add(ft, "line", "%u", line);

  expanded = format_expand(ft, data->key_format);

  key = key_string_lookup_string(expanded);

  free(expanded);

  format_free(ft);

  return (key);

}

static void

window_client_sort(struct sort_criteria *sort_crit)

{

  sort_crit->order_seq = window_client_order_seq;

  if (sort_crit->order == SORT_END)

    sort_crit->order = sort_crit->order_seq[0];

}

static const char* window_client_help_lines[] = {

  "#[fg=themelightgrey]"

  "          i #[#{E:tree-mode-border-style},acs]x#[default] Toggle info view",

  "#[fg=themelightgrey]"

  "      Enter #[#{E:tree-mode-border-style},acs]x#[default] Choose selected %1",

  "#[fg=themelightgrey]"

  "          d #[#{E:tree-mode-border-style},acs]x#[default] Detach selected %1",

  "#[fg=themelightgrey]"

  "          D #[#{E:tree-mode-border-style},acs]x#[default] Detach tagged %1s",

  "#[fg=themelightgrey]"

  "          x #[#{E:tree-mode-border-style},acs]x#[default] Detach selected %1",

  "#[fg=themelightgrey]"

  "          X #[#{E:tree-mode-border-style},acs]x#[default] Detach tagged %1s",

  "#[fg=themelightgrey]"

  "          z #[#{E:tree-mode-border-style},acs]x#[default] Suspend selected %1",

  "#[fg=themelightgrey]"

  "          Z #[#{E:tree-mode-border-style},acs]x#[default] Suspend tagged %1s",

  "#[fg=themelightgrey]"

  "          f #[#{E:tree-mode-border-style},acs]x#[default] Enter a filter",

  NULL

};

static const char**

window_client_help(u_int *width, const char **item)

{

  *width = 0;

  *item = "client";

  return (window_client_help_lines);

}

static struct screen *

window_client_init(struct window_mode_entry *wme,

    __unused struct cmdq_item *item, __unused struct cmd_find_state *fs,

    struct args *args)

{

  struct window_pane    *wp = wme->wp;

  struct window_client_modedata *data;

  struct screen     *s;

  wme->data = data = xcalloc(1, sizeof *data);

  data->wp = wp;

  data->hide_preview_this_pane = args != NULL && args_has(args, 'h');

  data->preview_is_info = args != NULL && args_has(args, 'i');

  if (args == NULL || !args_has(args, 'F'))

    data->format = xstrdup(WINDOW_CLIENT_DEFAULT_FORMAT);

  else

    data->format = xstrdup(args_get(args, 'F'));

  if (args == NULL || !args_has(args, 'K'))

    data->key_format = xstrdup(WINDOW_CLIENT_DEFAULT_KEY_FORMAT);

  else

    data->key_format = xstrdup(args_get(args, 'K'));

  if (args == NULL || args_count(args) == 0)

    data->command = xstrdup(WINDOW_CLIENT_DEFAULT_COMMAND);

  else

    data->command = xstrdup(args_string(args, 0));

  data->data = mode_tree_start(wp, args, window_client_build,

      window_client_draw, NULL, window_client_menu, NULL,

      window_client_get_key, NULL, window_client_sort,

      window_client_help, data, window_client_menu_items, &s);

  mode_tree_zoom(data->data, args);

  if (data->preview_is_info)

    mode_tree_view_name(data->data, "info");

  else

    mode_tree_view_name(data->data, "preview");

  mode_tree_build(data->data);

  mode_tree_draw(data->data);

  return (s);

}

static void

window_client_free(struct window_mode_entry *wme)

{

  struct window_client_modedata *data = wme->data;

  u_int        i;

  if (data == NULL)

    return;

  mode_tree_free(data->data);

  for (i = 0; i < data->item_size; i++)

    window_client_free_item(data->item_list[i]);

  free(data->item_list);

  free(data->format);

  free(data->key_format);

  free(data->command);

  free(data);

}

static void

window_client_resize(struct window_mode_entry *wme, u_int sx, u_int sy)

{

  struct window_client_modedata *data = wme->data;

  mode_tree_resize(data->data, sx, sy);

}

static void

window_client_update(struct window_mode_entry *wme)

{

  struct window_client_modedata *data = wme->data;

  mode_tree_build(data->data);

  mode_tree_draw(data->data);

  data->wp->flags |= PANE_REDRAW;

}

static void

window_client_do_detach(void *modedata, void *itemdata,

    __unused struct client *c, key_code key)

{

  struct window_client_modedata *data = modedata;

  struct window_client_itemdata *item = itemdata;

  if (item == mode_tree_get_current(data->data))

    mode_tree_down(data->data, 0);

  if (key == 'd' || key == 'D')

    server_client_detach(item->c, MSG_DETACH);

  else if (key == 'x' || key == 'X')

    server_client_detach(item->c, MSG_DETACHKILL);

  else if (key == 'z' || key == 'Z')

    server_client_suspend(item->c);

}

static void

window_client_key(struct window_mode_entry *wme, struct client *c,

    __unused struct session *s, __unused struct winlink *wl, key_code key,

    struct mouse_event *m)

{

  struct window_pane    *wp = wme->wp;

  struct window_client_modedata *data = wme->data;

  struct mode_tree_data   *mtd = data->data;

  struct window_client_itemdata *item;

  int        finished;

  finished = mode_tree_key(mtd, c, &key, m, NULL, NULL);

  switch (key) {

  case 'd':

  case 'x':

  case 'z':

    item = mode_tree_get_current(mtd);

    window_client_do_detach(data, item, c, key);

    mode_tree_build(mtd);

    break;

  case 'D':

  case 'X':

  case 'Z':

    mode_tree_each_tagged(mtd, window_client_do_detach, c, key, 0);

    mode_tree_build(mtd);

    break;

  case 'i':

    data->preview_is_info = !data->preview_is_info;

    if (data->preview_is_info)

      mode_tree_view_name(mtd, "info");

    else

      mode_tree_view_name(mtd, "preview");

    mode_tree_build(mtd);

    break;

  case '\r':

    item = mode_tree_get_current(mtd);

    mode_tree_run_command(c, NULL, data->command, item->ttyname);

    finished = 1;

    break;

  }

  if (finished || server_client_how_many() == 0)

    window_pane_reset_mode(wp);

  else {

    mode_tree_draw(mtd);

    wp->flags |= PANE_REDRAW;

  }

}