1 /* $OpenBSD: menu.c,v 1.10 2019/06/18 11:08:42 nicm Exp $ */ 2 3 /* 4 * Copyright (c) 2019 Nicholas Marriott <nicholas.marriott@gmail.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 21 #include <stdlib.h> 22 #include <string.h> 23 24 #include "tmux.h" 25 26 struct menu_data { 27 struct cmdq_item *item; 28 int flags; 29 30 struct cmd_find_state fs; 31 struct screen s; 32 33 u_int px; 34 u_int py; 35 36 struct menu *menu; 37 int choice; 38 39 menu_choice_cb cb; 40 void *data; 41 }; 42 43 void 44 menu_add_items(struct menu *menu, const struct menu_item *items, 45 struct cmdq_item *qitem, struct client *c, struct cmd_find_state *fs) 46 { 47 const struct menu_item *loop; 48 49 for (loop = items; loop->name != NULL; loop++) 50 menu_add_item(menu, loop, qitem, c, fs); 51 } 52 53 void 54 menu_add_item(struct menu *menu, const struct menu_item *item, 55 struct cmdq_item *qitem, struct client *c, struct cmd_find_state *fs) 56 { 57 struct menu_item *new_item; 58 const char *key, *cmd; 59 char *s, *name; 60 u_int width; 61 int line; 62 63 line = (item == NULL || item->name == NULL || *item->name == '\0'); 64 if (line && menu->count == 0) 65 return; 66 67 menu->items = xreallocarray(menu->items, menu->count + 1, 68 sizeof *menu->items); 69 new_item = &menu->items[menu->count++]; 70 memset(new_item, 0, sizeof *new_item); 71 72 if (line) 73 return; 74 75 if (fs != NULL) 76 s = format_single(qitem, item->name, c, fs->s, fs->wl, fs->wp); 77 else 78 s = format_single(qitem, item->name, c, NULL, NULL, NULL); 79 if (*s == '\0') { /* no item if empty after format expanded */ 80 menu->count--; 81 return; 82 } 83 if (*s != '-' && item->key != KEYC_UNKNOWN && item->key != KEYC_NONE) { 84 key = key_string_lookup_key(item->key); 85 xasprintf(&name, "%s#[default] #[align=right](%s)", s, key); 86 } else 87 xasprintf(&name, "%s", s); 88 new_item->name = name; 89 free(s); 90 91 cmd = item->command; 92 if (cmd != NULL) { 93 if (fs != NULL) 94 s = format_single(qitem, cmd, c, fs->s, fs->wl, fs->wp); 95 else 96 s = format_single(qitem, cmd, c, NULL, NULL, NULL); 97 } else 98 s = NULL; 99 new_item->command = s; 100 new_item->key = item->key; 101 102 width = format_width(new_item->name); 103 if (width > menu->width) 104 menu->width = width; 105 } 106 107 struct menu * 108 menu_create(const char *title) 109 { 110 struct menu *menu; 111 112 menu = xcalloc(1, sizeof *menu); 113 menu->title = xstrdup(title); 114 115 return (menu); 116 } 117 118 void 119 menu_free(struct menu *menu) 120 { 121 u_int i; 122 123 for (i = 0; i < menu->count; i++) { 124 free((void *)menu->items[i].name); 125 free((void *)menu->items[i].command); 126 } 127 free(menu->items); 128 129 free((void *)menu->title); 130 free(menu); 131 } 132 133 static void 134 menu_draw_cb(struct client *c, __unused struct screen_redraw_ctx *ctx0) 135 { 136 struct menu_data *md = c->overlay_data; 137 struct tty *tty = &c->tty; 138 struct screen *s = &md->s; 139 struct menu *menu = md->menu; 140 struct screen_write_ctx ctx; 141 u_int i, px, py; 142 143 screen_write_start(&ctx, NULL, s); 144 screen_write_clearscreen(&ctx, 8); 145 screen_write_menu(&ctx, menu, md->choice); 146 screen_write_stop(&ctx); 147 148 px = md->px; 149 py = md->py; 150 151 for (i = 0; i < screen_size_y(&md->s); i++) 152 tty_draw_line(tty, NULL, s, 0, i, menu->width + 4, px, py + i); 153 154 if (~md->flags & MENU_NOMOUSE) 155 tty_update_mode(tty, MODE_MOUSE_ALL, NULL); 156 } 157 158 static void 159 menu_free_cb(struct client *c) 160 { 161 struct menu_data *md = c->overlay_data; 162 163 if (md->item != NULL) 164 cmdq_continue(md->item); 165 166 if (md->cb != NULL) 167 md->cb(md->menu, UINT_MAX, KEYC_NONE, md->data); 168 169 screen_free(&md->s); 170 menu_free(md->menu); 171 free(md); 172 } 173 174 static int 175 menu_key_cb(struct client *c, struct key_event *event) 176 { 177 struct menu_data *md = c->overlay_data; 178 struct menu *menu = md->menu; 179 struct mouse_event *m = &event->m; 180 u_int i; 181 int count = menu->count, old = md->choice; 182 const struct menu_item *item; 183 struct cmdq_item *new_item; 184 struct cmd_parse_result *pr; 185 const char *name; 186 187 if (KEYC_IS_MOUSE(event->key)) { 188 if (md->flags & MENU_NOMOUSE) 189 return (0); 190 if (m->x < md->px || 191 m->x > md->px + 4 + menu->width || 192 m->y < md->py + 1 || 193 m->y > md->py + 1 + count - 1) { 194 if (MOUSE_RELEASE(m->b)) 195 return (1); 196 if (md->choice != -1) { 197 md->choice = -1; 198 c->flags |= CLIENT_REDRAWOVERLAY; 199 } 200 return (0); 201 } 202 if (MOUSE_RELEASE(m->b)) 203 goto chosen; 204 md->choice = m->y - (md->py + 1); 205 if (md->choice != old) 206 c->flags |= CLIENT_REDRAWOVERLAY; 207 return (0); 208 } 209 switch (event->key) { 210 case KEYC_UP: 211 if (old == -1) 212 old = 0; 213 do { 214 if (md->choice == -1 || md->choice == 0) 215 md->choice = count - 1; 216 else 217 md->choice--; 218 name = menu->items[md->choice].name; 219 } while ((name == NULL || *name == '-') && md->choice != old); 220 c->flags |= CLIENT_REDRAWOVERLAY; 221 return (0); 222 case KEYC_DOWN: 223 if (old == -1) 224 old = 0; 225 do { 226 if (md->choice == -1 || md->choice == count - 1) 227 md->choice = 0; 228 else 229 md->choice++; 230 name = menu->items[md->choice].name; 231 } while ((name == NULL || *name == '-') && md->choice != old); 232 c->flags |= CLIENT_REDRAWOVERLAY; 233 return (0); 234 case '\r': 235 goto chosen; 236 case '\033': /* Escape */ 237 case '\003': /* C-c */ 238 case '\007': /* C-g */ 239 case 'q': 240 return (1); 241 } 242 for (i = 0; i < (u_int)count; i++) { 243 name = menu->items[i].name; 244 if (name == NULL || *name == '-') 245 continue; 246 if (event->key == menu->items[i].key) { 247 md->choice = i; 248 goto chosen; 249 } 250 } 251 return (0); 252 253 chosen: 254 if (md->choice == -1) 255 return (1); 256 item = &menu->items[md->choice]; 257 if (item->name == NULL || *item->name == '-') 258 return (1); 259 if (md->cb != NULL) { 260 md->cb(md->menu, md->choice, item->key, md->data); 261 md->cb = NULL; 262 return (1); 263 } 264 265 pr = cmd_parse_from_string(item->command, NULL); 266 switch (pr->status) { 267 case CMD_PARSE_EMPTY: 268 new_item = NULL; 269 break; 270 case CMD_PARSE_ERROR: 271 new_item = cmdq_get_error(pr->error); 272 free(pr->error); 273 cmdq_append(c, new_item); 274 break; 275 case CMD_PARSE_SUCCESS: 276 if (md->item != NULL) 277 m = &md->item->shared->mouse; 278 else 279 m = NULL; 280 new_item = cmdq_get_command(pr->cmdlist, &md->fs, m, 0); 281 cmd_list_free(pr->cmdlist); 282 cmdq_append(c, new_item); 283 break; 284 } 285 return (1); 286 } 287 288 int 289 menu_display(struct menu *menu, int flags, struct cmdq_item *item, u_int px, 290 u_int py, struct client *c, struct cmd_find_state *fs, menu_choice_cb cb, 291 void *data) 292 { 293 struct menu_data *md; 294 295 if (c->tty.sx < menu->width + 4 || c->tty.sy < menu->count + 2) 296 return (-1); 297 298 md = xcalloc(1, sizeof *md); 299 md->item = item; 300 md->flags = flags; 301 302 if (fs != NULL) 303 cmd_find_copy_state(&md->fs, fs); 304 screen_init(&md->s, menu->width + 4, menu->count + 2, 0); 305 306 md->px = px; 307 md->py = py; 308 309 md->menu = menu; 310 md->choice = -1; 311 312 md->cb = cb; 313 md->data = data; 314 315 server_client_set_overlay(c, 0, menu_draw_cb, menu_key_cb, menu_free_cb, 316 md); 317 return (0); 318 } 319