aewl: 7066ff2fe8bc menu.c

aewl

view menu.c @ 8:7066ff2fe8bc

added key handling

author	Anselm R. Garbe <garbeam@wmii.de>
date	Tue, 11 Jul 2006 11:50:18 +0200
parents	e0cefb3981c8
children	d567f430a81d

line source

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 */

7 #include "config.h"

8 #include "draw.h"

9 #include "util.h"

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>

23 typedef struct Item Item;

25 struct Item {

26 Item *next; /* traverses all items */

27 Item *left, *right; /* traverses items matching current search pattern */

28 char *text;

29 };

31 static Display *dpy;

32 static Window root;

33 static Window win;

34 static XRectangle rect;

35 static Bool done = False;

37 static Item *allitem = NULL; /* first of all items */

38 static Item *item = NULL; /* first of pattern matching items */

39 static Item *sel = NULL;

40 static Item *nextoff = NULL;

41 static Item *prevoff = NULL;

42 static Item *curroff = NULL;

44 static int screen;

45 static char *title = NULL;

46 static char text[4096];

47 static int ret = 0;

48 static int nitem = 0;

49 static unsigned int cmdw = 0;

50 static unsigned int twidth = 0;

51 static unsigned int cwidth = 0;

52 static const int seek = 30; /* 30px */

54 static Brush brush = {0};

56 static void draw_menu();

57 static void kpress(XKeyEvent * e);

59 static char version[] = "gridmenu - " VERSION ", (C)opyright MMVI Anselm R. Garbe\n";

61 static void

62 usage()

63 {

64 fprintf(stderr, "%s", "usage: gridmenu [-v] [-t <title>]\n");

65 exit(1);

66 }

68 static void

69 update_offsets()

70 {

71 unsigned int tw, w = cmdw + 2 * seek;

73 if(!curroff)

74 return;

76 for(nextoff = curroff; nextoff; nextoff=nextoff->right) {

77 tw = textwidth(&brush.font, nextoff->text);

78 if(tw > rect.width / 3)

79 tw = rect.width / 3;

80 w += tw + brush.font.height;

81 if(w > rect.width)

82 break;

83 }

85 w = cmdw + 2 * seek;

86 for(prevoff = curroff; prevoff && prevoff->left; prevoff=prevoff->left) {

87 tw = textwidth(&brush.font, prevoff->left->text);

88 if(tw > rect.width / 3)

89 tw = rect.width / 3;

90 w += tw + brush.font.height;

91 if(w > rect.width)

92 break;

93 }

94 }

96 static void

97 update_items(char *pattern)

98 {

99 unsigned int plen = strlen(pattern);

100 Item *i, *j;

101

102 if(!pattern)

103 return;

104

105 if(!title || *pattern)

106 cmdw = cwidth;

107 else

108 cmdw = twidth;

109

110 item = j = NULL;

111 nitem = 0;

112

113 for(i = allitem; i; i=i->next)

114 if(!plen || !strncmp(pattern, i->text, plen)) {

115 if(!j)

116 item = i;

117 else

118 j->right = i;

119 i->left = j;

120 i->right = NULL;

121 j = i;

122 nitem++;

123 }

124 for(i = allitem; i; i=i->next)

125 if(plen && strncmp(pattern, i->text, plen)

126 && strstr(i->text, pattern)) {

127 if(!j)

128 item = i;

129 else

130 j->right = i;

131 i->left = j;

132 i->right = NULL;

133 j = i;

134 nitem++;

135 }

136

137 curroff = prevoff = nextoff = sel = item;

138

139 update_offsets();

140 }

141

142 /* creates brush structs for brush mode drawing */

143 static void

144 draw_menu()

145 {

146 unsigned int offx = 0;

147 Item *i;

148

149 brush.rect = rect;

150 brush.rect.x = 0;

151 brush.rect.y = 0;

152 draw(dpy, &brush, False, 0);

153

154 /* print command */

155 if(!title || text[0]) {

156 cmdw = cwidth;

157 if(cmdw && item)

158 brush.rect.width = cmdw;

159 draw(dpy, &brush, False, text);

160 }

161 else {

162 cmdw = twidth;

163 brush.rect.width = cmdw;

164 draw(dpy, &brush, False, title);

165 }

166 offx += brush.rect.width;

167

168 if(curroff) {

169 brush.rect.x = offx;

170 brush.rect.width = seek;

171 offx += brush.rect.width;

172 draw(dpy, &brush, False, (curroff && curroff->left) ? "<" : 0);

173

174 /* determine maximum items */

175 for(i = curroff; i != nextoff; i=i->right) {

176 brush.border = False;

177 brush.rect.x = offx;

178 brush.rect.width = textwidth(&brush.font, i->text);

179 if(brush.rect.width > rect.width / 3)

180 brush.rect.width = rect.width / 3;

181 brush.rect.width += brush.font.height;

182 if(sel == i) {

183 swap((void **)&brush.fg, (void **)&brush.bg);

184 draw(dpy, &brush, True, i->text);

185 swap((void **)&brush.fg, (void **)&brush.bg);

186 }

187 else

188 draw(dpy, &brush, False, i->text);

189 offx += brush.rect.width;

190 }

191

192 brush.rect.x = rect.width - seek;

193 brush.rect.width = seek;

194 draw(dpy, &brush, False, nextoff ? ">" : 0);

195 }

196 XCopyArea(dpy, brush.drawable, win, brush.gc, 0, 0, rect.width,

197 rect.height, 0, 0);

198 XFlush(dpy);

199 }

200

201 static void

202 kpress(XKeyEvent * e)

203 {

204 KeySym ksym;

205 char buf[32];

206 int num, prev_nitem;

207 unsigned int i, len = strlen(text);

208

209 buf[0] = 0;

210 num = XLookupString(e, buf, sizeof(buf), &ksym, 0);

211

212 if(IsFunctionKey(ksym) || IsKeypadKey(ksym)

213 || IsMiscFunctionKey(ksym) || IsPFKey(ksym)

214 || IsPrivateKeypadKey(ksym))

215 return;

216

217 /* first check if a control mask is omitted */

218 if(e->state & ControlMask) {

219 switch (ksym) {

220 case XK_H:

221 case XK_h:

222 ksym = XK_BackSpace;

223 break;

224 case XK_I:

225 case XK_i:

226 ksym = XK_Tab;

227 break;

228 case XK_J:

229 case XK_j:

230 ksym = XK_Return;

231 break;

232 case XK_N:

233 case XK_n:

234 ksym = XK_Right;

235 break;

236 case XK_P:

237 case XK_p:

238 ksym = XK_Left;

239 break;

240 case XK_U:

241 case XK_u:

242 text[0] = 0;

243 update_items(text);

244 draw_menu();

245 return;

246 break;

247 case XK_bracketleft:

248 ksym = XK_Escape;

249 break;

250 default: /* ignore other control sequences */

251 return;

252 break;

253 }

254 }

255 switch (ksym) {

256 case XK_Left:

257 if(!(sel && sel->left))

258 return;

259 sel=sel->left;

260 if(sel->right == curroff) {

261 curroff = prevoff;

262 update_offsets();

263 }

264 break;

265 case XK_Tab:

266 if(!sel)

267 return;

268 strncpy(text, sel->text, sizeof(text));

269 update_items(text);

270 break;

271 case XK_Right:

272 if(!(sel && sel->right))

273 return;

274 sel=sel->right;

275 if(sel == nextoff) {

276 curroff = nextoff;

277 update_offsets();

278 }

279 break;

280 case XK_Return:

281 if(e->state & ShiftMask) {

282 if(text)

283 fprintf(stdout, "%s", text);

284 }

285 else if(sel)

286 fprintf(stdout, "%s", sel->text);

287 else if(text)

288 fprintf(stdout, "%s", text);

289 fflush(stdout);

290 done = True;

291 break;

292 case XK_Escape:

293 ret = 1;

294 done = True;

295 break;

296 case XK_BackSpace:

297 if((i = len)) {

298 prev_nitem = nitem;

299 do {

300 text[--i] = 0;

301 update_items(text);

302 } while(i && nitem && prev_nitem == nitem);

303 update_items(text);

304 }

305 break;

306 default:

307 if((num == 1) && !iscntrl((int) buf[0])) {

308 buf[num] = 0;

309 if(len > 0)

310 strncat(text, buf, sizeof(text));

311 else

312 strncpy(text, buf, sizeof(text));

313 update_items(text);

314 }

315 }

316 draw_menu();

317 }

318

319 static char *

320 read_allitems()

321 {

322 static char *maxname = NULL;

323 char *p, buf[1024];

324 unsigned int len = 0, max = 0;

325 Item *i, *new;

326

327 i = 0;

328 while(fgets(buf, sizeof(buf), stdin)) {

329 len = strlen(buf);

330 if (buf[len - 1] == '\n')

331 buf[len - 1] = 0;

332 p = estrdup(buf);

333 if(max < len) {

334 maxname = p;

335 max = len;

336 }

337

338 new = emalloc(sizeof(Item));

339 new->next = new->left = new->right = NULL;

340 new->text = p;

341 if(!i)

342 allitem = new;

343 else

344 i->next = new;

345 i = new;

346 }

347

348 return maxname;

349 }

350

351 int

352 main(int argc, char *argv[])

353 {

354 int i;

355 XSetWindowAttributes wa;

356 char *maxname;

357 XEvent ev;

358

359 char buf[256];

360

361 fputs(STATUSCMD, stdout);

362 fputs("\n", stdout);

363 pipe_spawn(buf, sizeof(buf), NULL, STATUSCMD);

364 fputs(buf, stderr);

365

366 return 0;

367

368 /* command line args */

369 for(i = 1; i < argc; i++) {

370 if (argv[i][0] == '-')

371 switch (argv[i][1]) {

372 case 'v':

373 fprintf(stdout, "%s", version);

374 exit(0);

375 break;

376 case 't':

377 if(++i < argc)

378 title = argv[i];

379 else

380 usage();

381 break;

382 default:

383 usage();

384 break;

385 }

386 else

387 usage();

388 }

389

390 dpy = XOpenDisplay(0);

391 if(!dpy)

392 error("gridmenu: cannot open dpy\n");

393 screen = DefaultScreen(dpy);

394 root = RootWindow(dpy, screen);

395

396 maxname = read_allitems();

397

398 /* grab as early as possible, but after reading all items!!! */

399 while(XGrabKeyboard(dpy, root, True, GrabModeAsync,

400 GrabModeAsync, CurrentTime) != GrabSuccess)

401 usleep(1000);

402

403 /* style */

404 loadcolors(dpy, screen, &brush, BGCOLOR, FGCOLOR, BORDERCOLOR);

405 loadfont(dpy, &brush.font, FONT);

406

407 wa.override_redirect = 1;

408 wa.background_pixmap = ParentRelative;

409 wa.event_mask = ExposureMask | ButtonPressMask | KeyPressMask;

410

411 rect.width = DisplayWidth(dpy, screen);

412 rect.height = labelheight(&brush.font);

413 rect.y = DisplayHeight(dpy, screen) - rect.height;

414 rect.x = 0;

415

416 win = XCreateWindow(dpy, root, rect.x, rect.y,

417 rect.width, rect.height, 0, DefaultDepth(dpy, screen),

418 CopyFromParent, DefaultVisual(dpy, screen),

419 CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);

420 XDefineCursor(dpy, win, XCreateFontCursor(dpy, XC_xterm));

421 XFlush(dpy);

422

423 /* pixmap */

424 brush.gc = XCreateGC(dpy, root, 0, 0);

425 brush.drawable = XCreatePixmap(dpy, win, rect.width, rect.height,

426 DefaultDepth(dpy, screen));

427 XFlush(dpy);

428

429 if(maxname)

430 cwidth = textwidth(&brush.font, maxname) + brush.font.height;

431 if(cwidth > rect.width / 3)

432 cwidth = rect.width / 3;

433

434 if(title) {

435 twidth = textwidth(&brush.font, title) + brush.font.height;

436 if(twidth > rect.width / 3)

437 twidth = rect.width / 3;

438 }

439

440 cmdw = title ? twidth : cwidth;

441

442 text[0] = 0;

443 update_items(text);

444 XMapRaised(dpy, win);

445 draw_menu();

446 XFlush(dpy);

447

448 /* main event loop */

449 while(!XNextEvent(dpy, &ev)) {

450 switch (ev.type) {

451 case KeyPress:

452 kpress(&ev.xkey);

453 break;

454 case Expose:

455 if(ev.xexpose.count == 0) {

456 draw_menu();

457 }

458 break;

459 default:

460 break;

461 }

462 if(done)

463 break;

464 }

465

466 XUngrabKeyboard(dpy, CurrentTime);

467 XFreePixmap(dpy, brush.drawable);

468 XFreeGC(dpy, brush.gc);

469 XDestroyWindow(dpy, win);

470 XCloseDisplay(dpy);

471

472 return ret;

473 }