notify.c

   1 /* $OpenBSD$ */
   2
   3 /*
   4  * Copyright (c) 2012 George Nachman <tmux@georgester.com>
   5  *
   6  * Permission to use, copy, modify, and distribute this software for any
   7  * purpose with or without fee is hereby granted, provided that the above
   8  * copyright notice and this permission notice appear in all copies.
   9  *
  10  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  11  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  12  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  13  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  14  * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
  15  * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
  16  * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  17  */
  18
  19 #include <sys/types.h>
  20 #include <sys/queue.h>
  21
  22 #include <stdlib.h>
  23 #include <string.h>
  24
  25 #include "tmux.h"
  26
  27 struct notify_entry {
  28         const char              *name;
  29         struct cmd_find_state    fs;
  30         struct format_tree      *formats;
  31
  32         struct client           *client;
  33         struct session          *session;
  34         struct window           *window;
  35         int                      pane;
  36 };
  37
  38 static struct cmdq_item *
  39 notify_insert_one_hook(struct cmdq_item *item, struct notify_entry *ne,
  40     struct cmd_list *cmdlist, struct cmdq_state *state)
  41 {
  42         struct cmdq_item        *new_item;
  43         char                    *s;
  44
  45         if (cmdlist == NULL)
  46                 return (item);
  47         if (log_get_level() != 0) {
  48                 s = cmd_list_print(cmdlist, 0);
  49                 log_debug("%s: hook %s is: %s", __func__, ne->name, s);
  50                 free(s);
  51         }
  52         new_item = cmdq_get_command(cmdlist, state);
  53         return (cmdq_insert_after(item, new_item));
  54 }
  55
  56 static void
  57 notify_insert_hook(struct cmdq_item *item, struct notify_entry *ne)
  58 {
  59         struct cmd_find_state            fs;
  60         struct options                  *oo;
  61         struct cmdq_state               *state;
  62         struct options_entry            *o;
  63         struct options_array_item       *a;
  64         struct cmd_list                 *cmdlist;
  65         const char                      *value;
  66         struct cmd_parse_result         *pr;
  67
  68         log_debug("%s: inserting hook %s", __func__, ne->name);
  69
  70         cmd_find_clear_state(&fs, 0);
  71         if (cmd_find_empty_state(&ne->fs) || !cmd_find_valid_state(&ne->fs))
  72                 cmd_find_from_nothing(&fs, 0);
  73         else
  74                 cmd_find_copy_state(&fs, &ne->fs);
  75
  76         if (fs.s == NULL)
  77                 oo = global_s_options;
  78         else
  79                 oo = fs.s->options;
  80         o = options_get(oo, ne->name);
  81         if (o == NULL && fs.wp != NULL) {
  82                 oo = fs.wp->options;
  83                 o = options_get(oo, ne->name);
  84         }
  85         if (o == NULL && fs.wl != NULL) {
  86                 oo = fs.wl->window->options;
  87                 o = options_get(oo, ne->name);
  88         }
  89         if (o == NULL) {
  90                 log_debug("%s: hook %s not found", __func__, ne->name);
  91                 return;
  92         }
  93
  94         state = cmdq_new_state(&fs, NULL, CMDQ_STATE_NOHOOKS);
  95         cmdq_add_formats(state, ne->formats);
  96
  97         if (*ne->name == '@') {
  98                 value = options_get_string(oo, ne->name);
  99                 pr = cmd_parse_from_string(value, NULL);
 100                 switch (pr->status) {
 101                 case CMD_PARSE_ERROR:
 102                         log_debug("%s: can't parse hook %s: %s", __func__,
 103                             ne->name, pr->error);
 104                         free(pr->error);
 105                         break;
 106                 case CMD_PARSE_SUCCESS:
 107                         notify_insert_one_hook(item, ne, pr->cmdlist, state);
 108                         break;
 109                 }
 110         } else {
 111                 a = options_array_first(o);
 112                 while (a != NULL) {
 113                         cmdlist = options_array_item_value(a)->cmdlist;
 114                         item = notify_insert_one_hook(item, ne, cmdlist, state);
 115                         a = options_array_next(a);
 116                 }
 117         }
 118
 119         cmdq_free_state(state);
 120 }
 121
 122 static enum cmd_retval
 123 notify_callback(struct cmdq_item *item, void *data)
 124 {
 125         struct notify_entry     *ne = data;
 126
 127         log_debug("%s: %s", __func__, ne->name);
 128
 129         if (strcmp(ne->name, "pane-mode-changed") == 0)
 130                 control_notify_pane_mode_changed(ne->pane);
 131         if (strcmp(ne->name, "window-layout-changed") == 0)
 132                 control_notify_window_layout_changed(ne->window);
 133         if (strcmp(ne->name, "window-pane-changed") == 0)
 134                 control_notify_window_pane_changed(ne->window);
 135         if (strcmp(ne->name, "window-unlinked") == 0)
 136                 control_notify_window_unlinked(ne->session, ne->window);
 137         if (strcmp(ne->name, "window-linked") == 0)
 138                 control_notify_window_linked(ne->session, ne->window);
 139         if (strcmp(ne->name, "window-renamed") == 0)
 140                 control_notify_window_renamed(ne->window);
 141         if (strcmp(ne->name, "client-session-changed") == 0)
 142                 control_notify_client_session_changed(ne->client);
 143         if (strcmp(ne->name, "client-detached") == 0)
 144                 control_notify_client_detached(ne->client);
 145         if (strcmp(ne->name, "session-renamed") == 0)
 146                 control_notify_session_renamed(ne->session);
 147         if (strcmp(ne->name, "session-created") == 0)
 148                 control_notify_session_created(ne->session);
 149         if (strcmp(ne->name, "session-closed") == 0)
 150                 control_notify_session_closed(ne->session);
 151         if (strcmp(ne->name, "session-window-changed") == 0)
 152                 control_notify_session_window_changed(ne->session);
 153
 154         notify_insert_hook(item, ne);
 155
 156         if (ne->client != NULL)
 157                 server_client_unref(ne->client);
 158         if (ne->session != NULL)
 159                 session_remove_ref(ne->session, __func__);
 160         if (ne->window != NULL)
 161                 window_remove_ref(ne->window, __func__);
 162
 163         if (ne->fs.s != NULL)
 164                 session_remove_ref(ne->fs.s, __func__);
 165
 166         format_free(ne->formats);
 167         free((void *)ne->name);
 168         free(ne);
 169
 170         return (CMD_RETURN_NORMAL);
 171 }
 172
 173 static void
 174 notify_add(const char *name, struct cmd_find_state *fs, struct client *c,
 175     struct session *s, struct window *w, struct window_pane *wp)
 176 {
 177         struct notify_entry     *ne;
 178         struct cmdq_item        *item;
 179
 180         item = cmdq_running(NULL);
 181         if (item != NULL && (cmdq_get_flags(item) & CMDQ_STATE_NOHOOKS))
 182                 return;
 183
 184         ne = xcalloc(1, sizeof *ne);
 185         ne->name = xstrdup(name);
 186
 187         ne->client = c;
 188         ne->session = s;
 189         ne->window = w;
 190         ne->pane = (wp != NULL ? wp->id : -1);
 191
 192         ne->formats = format_create(NULL, NULL, 0, FORMAT_NOJOBS);
 193         format_add(ne->formats, "hook", "%s", name);
 194         if (c != NULL)
 195                 format_add(ne->formats, "hook_client", "%s", c->name);
 196         if (s != NULL) {
 197                 format_add(ne->formats, "hook_session", "$%u", s->id);
 198                 format_add(ne->formats, "hook_session_name", "%s", s->name);
 199         }
 200         if (w != NULL) {
 201                 format_add(ne->formats, "hook_window", "@%u", w->id);
 202                 format_add(ne->formats, "hook_window_name", "%s", w->name);
 203         }
 204         if (wp != NULL)
 205                 format_add(ne->formats, "hook_pane", "%%%d", wp->id);
 206         format_log_debug(ne->formats, __func__);
 207
 208         if (c != NULL)
 209                 c->references++;
 210         if (s != NULL)
 211                 session_add_ref(s, __func__);
 212         if (w != NULL)
 213                 window_add_ref(w, __func__);
 214
 215         cmd_find_copy_state(&ne->fs, fs);
 216         if (ne->fs.s != NULL) /* cmd_find_valid_state needs session */
 217                 session_add_ref(ne->fs.s, __func__);
 218
 219         cmdq_append(NULL, cmdq_get_callback(notify_callback, ne));
 220 }
 221
 222 void
 223 notify_hook(struct cmdq_item *item, const char *name)
 224 {
 225         struct cmd_find_state   *target = cmdq_get_target(item);
 226         struct notify_entry      ne;
 227
 228         memset(&ne, 0, sizeof ne);
 229
 230         ne.name = name;
 231         cmd_find_copy_state(&ne.fs, target);
 232
 233         ne.client = cmdq_get_client(item);
 234         ne.session = target->s;
 235         ne.window = target->w;
 236         ne.pane = (target->wp != NULL ? target->wp->id : -1);
 237
 238         ne.formats = format_create(NULL, NULL, 0, FORMAT_NOJOBS);
 239         format_add(ne.formats, "hook", "%s", name);
 240         format_log_debug(ne.formats, __func__);
 241
 242         notify_insert_hook(item, &ne);
 243         format_free(ne.formats);
 244 }
 245
 246 void
 247 notify_client(const char *name, struct client *c)
 248 {
 249         struct cmd_find_state   fs;
 250
 251         cmd_find_from_client(&fs, c, 0);
 252         notify_add(name, &fs, c, NULL, NULL, NULL);
 253 }
 254
 255 void
 256 notify_session(const char *name, struct session *s)
 257 {
 258         struct cmd_find_state   fs;
 259
 260         if (session_alive(s))
 261                 cmd_find_from_session(&fs, s, 0);
 262         else
 263                 cmd_find_from_nothing(&fs, 0);
 264         notify_add(name, &fs, NULL, s, NULL, NULL);
 265 }
 266
 267 void
 268 notify_winlink(const char *name, struct winlink *wl)
 269 {
 270         struct cmd_find_state   fs;
 271
 272         cmd_find_from_winlink(&fs, wl, 0);
 273         notify_add(name, &fs, NULL, wl->session, wl->window, NULL);
 274 }
 275
 276 void
 277 notify_session_window(const char *name, struct session *s, struct window *w)
 278 {
 279         struct cmd_find_state   fs;
 280
 281         cmd_find_from_session_window(&fs, s, w, 0);
 282         notify_add(name, &fs, NULL, s, w, NULL);
 283 }
 284
 285 void
 286 notify_window(const char *name, struct window *w)
 287 {
 288         struct cmd_find_state   fs;
 289
 290         cmd_find_from_window(&fs, w, 0);
 291         notify_add(name, &fs, NULL, NULL, w, NULL);
 292 }
 293
 294 void
 295 notify_pane(const char *name, struct window_pane *wp)
 296 {
 297         struct cmd_find_state   fs;
 298
 299         cmd_find_from_pane(&fs, wp, 0);
 300         notify_add(name, &fs, NULL, NULL, NULL, wp);
 301 }