menu.c

   1 /*
   2  * (C)opyright MMVI Anselm R. Garbe <garbeam at gmail dot com>
   3  * (C)opyright MMVI Sander van Dijk <a dot h dot vandijk at gmail dot com>
   4  * See LICENSE file for license details.
   5  */
   6
   7 #include "config.h"
   8 #include "draw.h"
   9 #include "util.h"
  10
  11 #include <ctype.h>
  12 #include <stdlib.h>
  13 #include <stdio.h>
  14 #include <string.h>
  15 #include <sys/stat.h>
  16 #include <sys/wait.h>
  17 #include <time.h>
  18 #include <unistd.h>
  19 #include <X11/cursorfont.h>
  20 #include <X11/Xutil.h>
  21 #include <X11/keysym.h>
  22
  23 typedef struct Item Item;
  24
  25 struct Item {
  26         Item *next;             /* traverses all items */
  27         Item *left, *right;     /* traverses items matching current search pattern */
  28         char *text;
  29 };
  30
  31 static Display *dpy;
  32 static Window root;
  33 static Window win;
  34 static Bool done = False;
  35
  36 static Item *allitem = NULL;    /* first of all items */
  37 static Item *item = NULL;       /* first of pattern matching items */
  38 static Item *sel = NULL;
  39 static Item *nextoff = NULL;
  40 static Item *prevoff = NULL;
  41 static Item *curroff = NULL;
  42
  43 static int screen, mx, my, mw, mh;
  44 static char *title = NULL;
  45 static char text[4096];
  46 static int ret = 0;
  47 static int nitem = 0;
  48 static unsigned int cmdw = 0;
  49 static unsigned int tw = 0;
  50 static unsigned int cw = 0;
  51 static const int seek = 30;             /* 30px */
  52
  53 static Brush brush = {0};
  54
  55 static void draw_menu();
  56 static void kpress(XKeyEvent * e);
  57
  58 static char version[] = "gridmenu - " VERSION ", (C)opyright MMVI Anselm R. Garbe\n";
  59
  60 static void
  61 usage()
  62 {
  63         fprintf(stderr, "%s", "usage: gridmenu [-v] [-t <title>]\n");
  64         exit(1);
  65 }
  66
  67 static void
  68 update_offsets()
  69 {
  70         unsigned int tw, w = cmdw + 2 * seek;
  71
  72         if(!curroff)
  73                 return;
  74
  75         for(nextoff = curroff; nextoff; nextoff=nextoff->right) {
  76                 tw = textw(&brush.font, nextoff->text);
  77                 if(tw > mw / 3)
  78                         tw = mw / 3;
  79                 w += tw + brush.font.height;
  80                 if(w > mw)
  81                         break;
  82         }
  83
  84         w = cmdw + 2 * seek;
  85         for(prevoff = curroff; prevoff && prevoff->left; prevoff=prevoff->left) {
  86                 tw = textw(&brush.font, prevoff->left->text);
  87                 if(tw > mw / 3)
  88                         tw = mw / 3;
  89                 w += tw + brush.font.height;
  90                 if(w > mw)
  91                         break;
  92         }
  93 }
  94
  95 static void
  96 update_items(char *pattern)
  97 {
  98         unsigned int plen = strlen(pattern);
  99         Item *i, *j;
 100
 101         if(!pattern)
 102                 return;
 103
 104         if(!title || *pattern)
 105                 cmdw = cw;
 106         else
 107                 cmdw = tw;
 108
 109         item = j = NULL;
 110         nitem = 0;
 111
 112         for(i = allitem; i; i=i->next)
 113                 if(!plen || !strncmp(pattern, i->text, plen)) {
 114                         if(!j)
 115                                 item = i;
 116                         else
 117                                 j->right = i;
 118                         i->left = j;
 119                         i->right = NULL;
 120                         j = i;
 121                         nitem++;
 122                 }
 123         for(i = allitem; i; i=i->next)
 124                 if(plen && strncmp(pattern, i->text, plen)
 125                                 && strstr(i->text, pattern)) {
 126                         if(!j)
 127                                 item = i;
 128                         else
 129                                 j->right = i;
 130                         i->left = j;
 131                         i->right = NULL;
 132                         j = i;
 133                         nitem++;
 134                 }
 135
 136         curroff = prevoff = nextoff = sel = item;
 137
 138         update_offsets();
 139 }
 140
 141 /* creates brush structs for brush mode drawing */
 142 static void
 143 draw_menu()
 144 {
 145         Item *i;
 146
 147         brush.x = 0;
 148         brush.y = 0;
 149         brush.w = mw;
 150         brush.h = mh;
 151         draw(dpy, &brush, False, 0);
 152
 153         /* print command */
 154         if(!title || text[0]) {
 155                 cmdw = cw;
 156                 if(cmdw && item)
 157                         brush.w = cmdw;
 158                 draw(dpy, &brush, False, text);
 159         }
 160         else {
 161                 cmdw = tw;
 162                 brush.w = cmdw;
 163                 draw(dpy, &brush, False, title);
 164         }
 165         brush.x += brush.w;
 166
 167         if(curroff) {
 168                 brush.w = seek;
 169                 draw(dpy, &brush, False, (curroff && curroff->left) ? "<" : 0);
 170                 brush.x += brush.w;
 171
 172                 /* determine maximum items */
 173                 for(i = curroff; i != nextoff; i=i->right) {
 174                         brush.border = False;
 175                         brush.w = textw(&brush.font, i->text);
 176                         if(brush.w > mw / 3)
 177                                 brush.w = mw / 3;
 178                         brush.w += brush.font.height;
 179                         if(sel == i) {
 180                                 swap((void **)&brush.fg, (void **)&brush.bg);
 181                                 draw(dpy, &brush, True, i->text);
 182                                 swap((void **)&brush.fg, (void **)&brush.bg);
 183                         }
 184                         else
 185                                 draw(dpy, &brush, False, i->text);
 186                         brush.x += brush.w;
 187                 }
 188
 189                 brush.x = mw - seek;
 190                 brush.w = seek;
 191                 draw(dpy, &brush, False, nextoff ? ">" : 0);
 192         }
 193         XCopyArea(dpy, brush.drawable, win, brush.gc, 0, 0, mw, mh, 0, 0);
 194         XFlush(dpy);
 195 }
 196
 197 static void
 198 kpress(XKeyEvent * e)
 199 {
 200         KeySym ksym;
 201         char buf[32];
 202         int num, prev_nitem;
 203         unsigned int i, len = strlen(text);
 204
 205         buf[0] = 0;
 206         num = XLookupString(e, buf, sizeof(buf), &ksym, 0);
 207
 208         if(IsFunctionKey(ksym) || IsKeypadKey(ksym)
 209                         || IsMiscFunctionKey(ksym) || IsPFKey(ksym)
 210                         || IsPrivateKeypadKey(ksym))
 211                 return;
 212
 213         /* first check if a control mask is omitted */
 214         if(e->state & ControlMask) {
 215                 switch (ksym) {
 216                 case XK_H:
 217                 case XK_h:
 218                         ksym = XK_BackSpace;
 219                         break;
 220                 case XK_I:
 221                 case XK_i:
 222                         ksym = XK_Tab;
 223                         break;
 224                 case XK_J:
 225                 case XK_j:
 226                         ksym = XK_Return;
 227                         break;
 228                 case XK_N:
 229                 case XK_n:
 230                         ksym = XK_Right;
 231                         break;
 232                 case XK_P:
 233                 case XK_p:
 234                         ksym = XK_Left;
 235                         break;
 236                 case XK_U:
 237                 case XK_u:
 238                         text[0] = 0;
 239                         update_items(text);
 240                         draw_menu();
 241                         return;
 242                         break;
 243                 case XK_bracketleft:
 244                         ksym = XK_Escape;
 245                         break;
 246                 default:        /* ignore other control sequences */
 247                         return;
 248                         break;
 249                 }
 250         }
 251         switch (ksym) {
 252         case XK_Left:
 253                 if(!(sel && sel->left))
 254                         return;
 255                 sel=sel->left;
 256                 if(sel->right == curroff) {
 257                         curroff = prevoff;
 258                         update_offsets();
 259                 }
 260                 break;
 261         case XK_Tab:
 262                 if(!sel)
 263                         return;
 264                 strncpy(text, sel->text, sizeof(text));
 265                 update_items(text);
 266                 break;
 267         case XK_Right:
 268                 if(!(sel && sel->right))
 269                         return;
 270                 sel=sel->right;
 271                 if(sel == nextoff) {
 272                         curroff = nextoff;
 273                         update_offsets();
 274                 }
 275                 break;
 276         case XK_Return:
 277                 if(e->state & ShiftMask) {
 278                         if(text)
 279                                 fprintf(stdout, "%s", text);
 280                 }
 281                 else if(sel)
 282                         fprintf(stdout, "%s", sel->text);
 283                 else if(text)
 284                         fprintf(stdout, "%s", text);
 285                 fflush(stdout);
 286                 done = True;
 287                 break;
 288         case XK_Escape:
 289                 ret = 1;
 290                 done = True;
 291                 break;
 292         case XK_BackSpace:
 293                 if((i = len)) {
 294                         prev_nitem = nitem;
 295                         do {
 296                                 text[--i] = 0;
 297                                 update_items(text);
 298                         } while(i && nitem && prev_nitem == nitem);
 299                         update_items(text);
 300                 }
 301                 break;
 302         default:
 303                 if(num && !iscntrl((int) buf[0])) {
 304                         buf[num] = 0;
 305                         if(len > 0)
 306                                 strncat(text, buf, sizeof(text));
 307                         else
 308                                 strncpy(text, buf, sizeof(text));
 309                         update_items(text);
 310                 }
 311         }
 312         draw_menu();
 313 }
 314
 315 static char *
 316 read_allitems()
 317 {
 318         static char *maxname = NULL;
 319         char *p, buf[1024];
 320         unsigned int len = 0, max = 0;
 321         Item *i, *new;
 322
 323         i = 0;
 324         while(fgets(buf, sizeof(buf), stdin)) {
 325                 len = strlen(buf);
 326                 if (buf[len - 1] == '\n')
 327                         buf[len - 1] = 0;
 328                 p = estrdup(buf);
 329                 if(max < len) {
 330                         maxname = p;
 331                         max = len;
 332                 }
 333
 334                 new = emalloc(sizeof(Item));
 335                 new->next = new->left = new->right = NULL;
 336                 new->text = p;
 337                 if(!i)
 338                         allitem = new;
 339                 else
 340                         i->next = new;
 341                 i = new;
 342         }
 343
 344         return maxname;
 345 }
 346
 347 int
 348 main(int argc, char *argv[])
 349 {
 350         int i;
 351         XSetWindowAttributes wa;
 352         char *maxname;
 353         XEvent ev;
 354
 355         /* command line args */
 356         for(i = 1; i < argc; i++) {
 357                 if (argv[i][0] == '-')
 358                         switch (argv[i][1]) {
 359                         case 'v':
 360                                 fprintf(stdout, "%s", version);
 361                                 exit(0);
 362                                 break;
 363                         case 't':
 364                                 if(++i < argc)
 365                                         title = argv[i];
 366                                 else
 367                                         usage();
 368                                 break;
 369                         default:
 370                                 usage();
 371                                 break;
 372                         }
 373                 else
 374                         usage();
 375         }
 376
 377         dpy = XOpenDisplay(0);
 378         if(!dpy)
 379                 error("gridmenu: cannot open dpy\n");
 380         screen = DefaultScreen(dpy);
 381         root = RootWindow(dpy, screen);
 382
 383         maxname = read_allitems();
 384
 385         /* grab as early as possible, but after reading all items!!! */
 386         while(XGrabKeyboard(dpy, root, True, GrabModeAsync,
 387                          GrabModeAsync, CurrentTime) != GrabSuccess)
 388                 usleep(1000);
 389
 390         /* style */
 391         loadcolors(dpy, screen, &brush, BGCOLOR, FGCOLOR, BORDERCOLOR);
 392         loadfont(dpy, &brush.font, FONT);
 393
 394         wa.override_redirect = 1;
 395         wa.background_pixmap = ParentRelative;
 396         wa.event_mask = ExposureMask | ButtonPressMask | KeyPressMask;
 397
 398         mx = my = 0;
 399         mw = DisplayWidth(dpy, screen);
 400         mh = texth(&brush.font);
 401
 402         win = XCreateWindow(dpy, root, mx, my, mw, mh, 0,
 403                         DefaultDepth(dpy, screen), CopyFromParent,
 404                         DefaultVisual(dpy, screen),
 405                         CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
 406         XDefineCursor(dpy, win, XCreateFontCursor(dpy, XC_xterm));
 407         XFlush(dpy);
 408
 409         /* pixmap */
 410         brush.gc = XCreateGC(dpy, root, 0, 0);
 411         brush.drawable = XCreatePixmap(dpy, win, mw, mh,
 412                         DefaultDepth(dpy, screen));
 413         XFlush(dpy);
 414
 415         if(maxname)
 416                 cw = textw(&brush.font, maxname) + brush.font.height;
 417         if(cw > mw / 3)
 418                 cw = mw / 3;
 419
 420         if(title) {
 421                 tw = textw(&brush.font, title) + brush.font.height;
 422                 if(tw > mw / 3)
 423                         tw = mw / 3;
 424         }
 425
 426         cmdw = title ? tw : cw;
 427
 428         text[0] = 0;
 429         update_items(text);
 430         XMapRaised(dpy, win);
 431         draw_menu();
 432         XFlush(dpy);
 433
 434         /* main event loop */
 435         while(!XNextEvent(dpy, &ev)) {
 436                 switch (ev.type) {
 437                         case KeyPress:
 438                                 kpress(&ev.xkey);
 439                                 break;
 440                         case Expose:
 441                                 if(ev.xexpose.count == 0) {
 442                                         draw_menu();
 443                                 }
 444                                 break;
 445                         default:
 446                                 break;
 447                 }
 448                 if(done)
 449                         break;
 450         }
 451
 452         XUngrabKeyboard(dpy, CurrentTime);
 453         XFreePixmap(dpy, brush.drawable);
 454         XFreeGC(dpy, brush.gc);
 455         XDestroyWindow(dpy, win);
 456         XCloseDisplay(dpy);
 457
 458         return ret;
 459 }