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         const char              *pbname;
  37 };
  38
  39 static struct cmdq_item *
  40 notify_insert_one_hook(struct cmdq_item *item, struct notify_entry *ne,
  41     struct cmd_list *cmdlist, struct cmdq_state *state)
  42 {
  43         struct cmdq_item        *new_item;
  44         char                    *s;
  45
  46         if (cmdlist == NULL)
  47                 return (item);
  48         if (log_get_level() != 0) {
  49                 s = cmd_list_print(cmdlist, 0);
  50                 log_debug("%s: hook %s is: %s", __func__, ne->name, s);
  51                 free(s);
  52         }
  53         new_item = cmdq_get_command(cmdlist, state);
  54         return (cmdq_insert_after(item, new_item));
  55 }
  56
  57 static void
  58 notify_insert_hook(struct cmdq_item *item, struct notify_entry *ne)
  59 {
  60         struct cmd_find_state            fs;
  61         struct options                  *oo;
  62         struct cmdq_state               *state;
  63         struct options_entry            *o;
  64         struct options_array_item       *a;
  65         struct cmd_list                 *cmdlist;
  66         const char                      *value;
  67         struct cmd_parse_result         *pr;
  68
  69         log_debug("%s: inserting hook %s", __func__, ne->name);
  70
  71         cmd_find_clear_state(&fs, 0);
  72         if (cmd_find_empty_state(&ne->fs) || !cmd_find_valid_state(&ne->fs))
  73                 cmd_find_from_nothing(&fs, 0);
  74         else
  75                 cmd_find_copy_state(&fs, &ne->fs);
  76
  77         if (fs.s == NULL)
  78                 oo = global_s_options;
  79         else
  80                 oo = fs.s->options;
  81         o = options_get(oo, ne->name);
  82         if (o == NULL && fs.wp != NULL) {
  83                 oo = fs.wp->options;
  84                 o = options_get(oo, ne->name);
  85         }
  86         if (o == NULL && fs.wl != NULL) {
  87                 oo = fs.wl->window->options;
  88                 o = options_get(oo, ne->name);
  89         }
  90         if (o == NULL) {
  91                 log_debug("%s: hook %s not found", __func__, ne->name);
  92                 return;
  93         }
  94
  95         state = cmdq_new_state(&fs, NULL, CMDQ_STATE_NOHOOKS);
  96         cmdq_add_formats(state, ne->formats);
  97
  98         if (*ne->name == '@') {
  99                 value = options_get_string(oo, ne->name);
 100                 pr = cmd_parse_from_string(value, NULL);
 101                 switch (pr->status) {
 102                 case CMD_PARSE_ERROR:
 103                         log_debug("%s: can't parse hook %s: %s", __func__,
 104                             ne->name, pr->error);
 105                         free(pr->error);
 106                         break;
 107                 case CMD_PARSE_SUCCESS:
 108                         notify_insert_one_hook(item, ne, pr->cmdlist, state);
 109                         break;
 110                 }
 111         } else {
 112                 a = options_array_first(o);
 113                 while (a != NULL) {
 114                         cmdlist = options_array_item_value(a)->cmdlist;
 115                         item = notify_insert_one_hook(item, ne, cmdlist, state);
 116                         a = options_array_next(a);
 117                 }
 118         }
 119
 120         cmdq_free_state(state);
 121 }
 122
 123 static enum cmd_retval
 124 notify_callback(struct cmdq_item *item, void *data)
 125 {
 126         struct notify_entry     *ne = data;
 127
 128         log_debug("%s: %s", __func__, ne->name);
 129
 130         if (strcmp(ne->name, "pane-mode-changed") == 0)
 131                 control_notify_pane_mode_changed(ne->pane);
 132         if (strcmp(ne->name, "window-layout-changed") == 0)
 133                 control_notify_window_layout_changed(ne->window);
 134         if (strcmp(ne->name, "window-pane-changed") == 0)
 135                 control_notify_window_pane_changed(ne->window);
 136         if (strcmp(ne->name, "window-unlinked") == 0)
 137                 control_notify_window_unlinked(ne->session, ne->window);
 138         if (strcmp(ne->name, "window-linked") == 0)
 139                 control_notify_window_linked(ne->session, ne->window);
 140         if (strcmp(ne->name, "window-renamed") == 0)
 141                 control_notify_window_renamed(ne->window);
 142         if (strcmp(ne->name, "client-session-changed") == 0)
 143                 control_notify_client_session_changed(ne->client);
 144         if (strcmp(ne->name, "client-detached") == 0)
 145                 control_notify_client_detached(ne->client);
 146         if (strcmp(ne->name, "session-renamed") == 0)
 147                 control_notify_session_renamed(ne->session);
 148         if (strcmp(ne->name, "session-created") == 0)
 149                 control_notify_session_created(ne->session);
 150         if (strcmp(ne->name, "session-closed") == 0)
 151                 control_notify_session_closed(ne->session);
 152         if (strcmp(ne->name, "session-window-changed") == 0)
 153                 control_notify_session_window_changed(ne->session);
 154         if (strcmp(ne->name, "paste-buffer-changed") == 0)
 155                 control_notify_paste_buffer_changed(ne->pbname);
 156         if (strcmp(ne->name, "paste-buffer-deleted") == 0)
 157                 control_notify_paste_buffer_deleted(ne->pbname);
 158
 159         notify_insert_hook(item, ne);
 160
 161         if (ne->client != NULL)
 162                 server_client_unref(ne->client);
 163         if (ne->session != NULL)
 164                 session_remove_ref(ne->session, __func__);
 165         if (ne->window != NULL)
 166                 window_remove_ref(ne->window, __func__);
 167
 168         if (ne->fs.s != NULL)
 169                 session_remove_ref(ne->fs.s, __func__);
 170
 171         format_free(ne->formats);
 172         free((void *)ne->name);
 173         free((void *)ne->pbname);
 174         free(ne);
 175
 176         return (CMD_RETURN_NORMAL);
 177 }
 178
 179 static void
 180 notify_add(const char *name, struct cmd_find_state *fs, struct client *c,
 181     struct session *s, struct window *w, struct window_pane *wp,
 182     const char *pbname)
 183 {
 184         struct notify_entry     *ne;
 185         struct cmdq_item        *item;
 186
 187         item = cmdq_running(NULL);
 188         if (item != NULL && (cmdq_get_flags(item) & CMDQ_STATE_NOHOOKS))
 189                 return;
 190
 191         ne = xcalloc(1, sizeof *ne);
 192         ne->name = xstrdup(name);
 193
 194         ne->client = c;
 195         ne->session = s;
 196         ne->window = w;
 197         ne->pane = (wp != NULL ? (int)wp->id : -1);
 198         ne->pbname = (pbname != NULL ? xstrdup(pbname) : NULL);
 199
 200         ne->formats = format_create(NULL, NULL, 0, FORMAT_NOJOBS);
 201         format_add(ne->formats, "hook", "%s", name);
 202         if (c != NULL)
 203                 format_add(ne->formats, "hook_client", "%s", c->name);
 204         if (s != NULL) {
 205                 format_add(ne->formats, "hook_session", "$%u", s->id);
 206                 format_add(ne->formats, "hook_session_name", "%s", s->name);
 207         }
 208         if (w != NULL) {
 209                 format_add(ne->formats, "hook_window", "@%u", w->id);
 210                 format_add(ne->formats, "hook_window_name", "%s", w->name);
 211         }
 212         if (wp != NULL)
 213                 format_add(ne->formats, "hook_pane", "%%%d", wp->id);
 214         format_log_debug(ne->formats, __func__);
 215
 216         if (c != NULL)
 217                 c->references++;
 218         if (s != NULL)
 219                 session_add_ref(s, __func__);
 220         if (w != NULL)
 221                 window_add_ref(w, __func__);
 222
 223         cmd_find_copy_state(&ne->fs, fs);
 224         if (ne->fs.s != NULL) /* cmd_find_valid_state needs session */
 225                 session_add_ref(ne->fs.s, __func__);
 226
 227         cmdq_append(NULL, cmdq_get_callback(notify_callback, ne));
 228 }
 229
 230 void
 231 notify_hook(struct cmdq_item *item, const char *name)
 232 {
 233         struct cmd_find_state   *target = cmdq_get_target(item);
 234         struct notify_entry      ne;
 235
 236         memset(&ne, 0, sizeof ne);
 237
 238         ne.name = name;
 239         cmd_find_copy_state(&ne.fs, target);
 240
 241         ne.client = cmdq_get_client(item);
 242         ne.session = target->s;
 243         ne.window = target->w;
 244         ne.pane = (target->wp != NULL ? (int)target->wp->id : -1);
 245
 246         ne.formats = format_create(NULL, NULL, 0, FORMAT_NOJOBS);
 247         format_add(ne.formats, "hook", "%s", name);
 248         format_log_debug(ne.formats, __func__);
 249
 250         notify_insert_hook(item, &ne);
 251         format_free(ne.formats);
 252 }
 253
 254 void
 255 notify_client(const char *name, struct client *c)
 256 {
 257         struct cmd_find_state   fs;
 258
 259         cmd_find_from_client(&fs, c, 0);
 260         notify_add(name, &fs, c, NULL, NULL, NULL, NULL);
 261 }
 262
 263 void
 264 notify_session(const char *name, struct session *s)
 265 {
 266         struct cmd_find_state   fs;
 267
 268         if (session_alive(s))
 269                 cmd_find_from_session(&fs, s, 0);
 270         else
 271                 cmd_find_from_nothing(&fs, 0);
 272         notify_add(name, &fs, NULL, s, NULL, NULL, NULL);
 273 }
 274
 275 void
 276 notify_winlink(const char *name, struct winlink *wl)
 277 {
 278         struct cmd_find_state   fs;
 279
 280         cmd_find_from_winlink(&fs, wl, 0);
 281         notify_add(name, &fs, NULL, wl->session, wl->window, NULL, NULL);
 282 }
 283
 284 void
 285 notify_session_window(const char *name, struct session *s, struct window *w)
 286 {
 287         struct cmd_find_state   fs;
 288
 289         cmd_find_from_session_window(&fs, s, w, 0);
 290         notify_add(name, &fs, NULL, s, w, NULL, NULL);
 291 }
 292
 293 void
 294 notify_window(const char *name, struct window *w)
 295 {
 296         struct cmd_find_state   fs;
 297
 298         cmd_find_from_window(&fs, w, 0);
 299         notify_add(name, &fs, NULL, NULL, w, NULL, NULL);
 300 }
 301
 302 void
 303 notify_pane(const char *name, struct window_pane *wp)
 304 {
 305         struct cmd_find_state   fs;
 306
 307         cmd_find_from_pane(&fs, wp, 0);
 308         notify_add(name, &fs, NULL, NULL, NULL, wp, NULL);
 309 }
 310
 311 void
 312 notify_paste_buffer(const char *pbname, int deleted)
 313 {
 314         struct cmd_find_state   fs;
 315
 316         cmd_find_clear_state(&fs, 0);
 317         if (deleted) {
 318                 notify_add("paste-buffer-deleted", &fs, NULL, NULL, NULL, NULL,
 319                     pbname);
 320         } else {
 321                 notify_add("paste-buffer-changed", &fs, NULL, NULL, NULL, NULL,
 322                     pbname);
 323         }
 324 }