dinput.c

   1 /* See LICENSE file for copyright and license details. */
   2 #include <ctype.h>
   3 #include <locale.h>
   4 #include <stdarg.h>
   5 #include <stdio.h>
   6 #include <stdlib.h>
   7 #include <string.h>
   8 #include <strings.h>
   9 #include <unistd.h>
  10 #include <X11/keysym.h>
  11 #include <X11/Xlib.h>
  12 #include <X11/Xutil.h>
  13 #ifdef XINERAMA
  14 #include <X11/extensions/Xinerama.h>
  15 #endif
  16
  17 /* macros */
  18 #define CLEANMASK(mask)         (mask & ~(numlockmask | LockMask))
  19 #define INRECT(X,Y,RX,RY,RW,RH) ((X) >= (RX) && (X) < (RX) + (RW) && (Y) >= (RY) && (Y) < (RY) + (RH))
  20 #define MIN(a, b)               ((a) < (b) ? (a) : (b))
  21 #define MAX(a, b)               ((a) > (b) ? (a) : (b))
  22 #define IS_UTF8_1ST_CHAR(c)     ((((c) & 0xc0) == 0xc0) || !((c) & 0x80))
  23
  24 /* forward declarations */
  25 static void cleanup(void);
  26 static void drawcursor(void);
  27 static void drawinput(void);
  28 static void eprint(const char *errstr, ...);
  29 static Bool grabkeyboard(void);
  30 static void kpress(XKeyEvent * e);
  31 static void run(void);
  32 static void setup(Bool topbar);
  33
  34 #include "config.h"
  35
  36 /* variables */
  37 static char *prompt = NULL;
  38 static char text[4096];
  39 static int promptw = 0;
  40 static int ret = 0;
  41 static int screen;
  42 static unsigned int mw, mh;
  43 static unsigned int cursor = 0;
  44 static unsigned int numlockmask = 0;
  45 static Bool running = True;
  46 static Display *dpy;
  47 static Window parent, win;
  48
  49 #include "draw.c"
  50
  51 void
  52 cleanup(void) {
  53         dccleanup();
  54         XDestroyWindow(dpy, win);
  55         XUngrabKeyboard(dpy, CurrentTime);
  56 }
  57
  58 void
  59 drawcursor(void) {
  60         XRectangle r = { dc.x, dc.y + 2, 1, dc.font.height - 2 };
  61
  62         r.x += textnw(text, cursor) + dc.font.height / 2;
  63
  64         XSetForeground(dpy, dc.gc, dc.norm[ColFG]);
  65         XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
  66 }
  67
  68 void
  69 drawinput(void)
  70 {
  71         dc.x = 0;
  72         dc.y = 0;
  73         dc.w = mw;
  74         dc.h = mh;
  75         drawtext(NULL, dc.norm);
  76         /* print prompt? */
  77         if(prompt) {
  78                 dc.w = promptw;
  79                 drawtext(prompt, dc.sel);
  80                 dc.x += dc.w;
  81         }
  82         dc.w = mw - dc.x;
  83         drawtext(*text ? text : NULL, dc.norm);
  84         drawcursor();
  85         XCopyArea(dpy, dc.drawable, win, dc.gc, 0, 0, mw, mh, 0, 0);
  86         XFlush(dpy);
  87 }
  88
  89 void
  90 eprint(const char *errstr, ...) {
  91         va_list ap;
  92
  93         va_start(ap, errstr);
  94         vfprintf(stderr, errstr, ap);
  95         va_end(ap);
  96         exit(EXIT_FAILURE);
  97 }
  98
  99 Bool
 100 grabkeyboard(void) {
 101         unsigned int len;
 102
 103         for(len = 1000; len; len--) {
 104                 if(XGrabKeyboard(dpy, parent, True, GrabModeAsync, GrabModeAsync, CurrentTime)
 105                 == GrabSuccess)
 106                         break;
 107                 usleep(1000);
 108         }
 109         return len > 0;
 110 }
 111
 112 void
 113 kpress(XKeyEvent * e) {
 114         char buf[sizeof text];
 115         int num;
 116         unsigned int i, len;
 117         KeySym ksym;
 118
 119         len = strlen(text);
 120         num = XLookupString(e, buf, sizeof buf, &ksym, NULL);
 121         if(ksym == XK_KP_Enter)
 122                 ksym = XK_Return;
 123         else if(ksym >= XK_KP_0 && ksym <= XK_KP_9)
 124                 ksym = (ksym - XK_KP_0) + XK_0;
 125         else if(IsFunctionKey(ksym) || IsKeypadKey(ksym)
 126         || IsMiscFunctionKey(ksym) || IsPFKey(ksym)
 127         || IsPrivateKeypadKey(ksym))
 128                 return;
 129         /* first check if a control mask is omitted */
 130         if(e->state & ControlMask) {
 131                 switch(tolower(ksym)) {
 132                 default:
 133                         return;
 134                 case XK_a:
 135                         ksym = XK_Home;
 136                         break;
 137                 case XK_b:
 138                         ksym = XK_Left;
 139                         break;
 140                 case XK_c:
 141                         ksym = XK_Escape;
 142                         break;
 143                 case XK_e:
 144                         ksym = XK_End;
 145                         break;
 146                 case XK_f:
 147                         ksym = XK_Right;
 148                         break;
 149                 case XK_h:
 150                         ksym = XK_BackSpace;
 151                         break;
 152                 case XK_j:
 153                         ksym = XK_Return;
 154                         break;
 155                 case XK_k:
 156                         text[cursor] = '\0';
 157                         break;
 158                 case XK_u:
 159                         memmove(text, text + cursor, sizeof text - cursor + 1);
 160                         cursor = 0;
 161                         break;
 162                 case XK_w:
 163                         if(cursor > 0) {
 164                                 i = cursor;
 165                                 while(i-- > 0 && text[i] == ' ');
 166                                 while(i-- > 0 && text[i] != ' ');
 167                                 memmove(text + i + 1, text + cursor, sizeof text - cursor + 1);
 168                                 cursor = i + 1;
 169                         }
 170                         break;
 171                 case XK_y:
 172                         {
 173                                 FILE *fp;
 174                                 char *s;
 175                                 if(!(fp = popen("sselp", "r")))
 176                                         eprint("dinput: cannot popen sselp\n");
 177                                 s = fgets(buf, sizeof buf, fp);
 178                                 pclose(fp);
 179                                 if(s == NULL)
 180                                         return;
 181                         }
 182                         num = strlen(buf);
 183                         if(num && buf[num-1] == '\n')
 184                                 buf[--num] = '\0';
 185                         break;
 186                 }
 187         }
 188         switch(ksym) {
 189         default:
 190                 num = MIN(num, sizeof text - cursor);
 191                 if(num && !iscntrl((int) buf[0])) {
 192                         memmove(text + cursor + num, text + cursor, sizeof text - cursor - num);
 193                         memcpy(text + cursor, buf, num);
 194                         cursor += num;
 195                 }
 196                 break;
 197         case XK_BackSpace:
 198                 if(cursor == 0)
 199                         return;
 200                 for(i = 1; cursor - i > 0 && !IS_UTF8_1ST_CHAR(text[cursor - i]); i++);
 201                 memmove(text + cursor - i, text + cursor, sizeof text - cursor + i);
 202                 cursor -= i;
 203                 break;
 204         case XK_Delete:
 205                 if(cursor == len)
 206                         return;
 207                 for(i = 1; cursor + i < len && !IS_UTF8_1ST_CHAR(text[cursor + i]); i++);
 208                 memmove(text + cursor, text + cursor + i, sizeof text - cursor);
 209                 break;
 210         case XK_End:
 211                 cursor = len;
 212                 break;
 213         case XK_Escape:
 214                 ret = 1;
 215                 running = False;
 216                 return;
 217         case XK_Home:
 218                 cursor = 0;
 219                 break;
 220         case XK_Left:
 221                 if(cursor == 0)
 222                         return;
 223                 while(cursor-- > 0 && !IS_UTF8_1ST_CHAR(text[cursor]));
 224                 break;
 225         case XK_Return:
 226                 fprintf(stdout, "%s", text);
 227                 fflush(stdout);
 228                 running = False;
 229                 return;
 230         case XK_Right:
 231                 if(cursor == len)
 232                         return;
 233                 while(cursor++ < len && !IS_UTF8_1ST_CHAR(text[cursor]));
 234                 break;
 235         }
 236         drawinput();
 237 }
 238
 239 void
 240 run(void) {
 241         XEvent ev;
 242
 243         /* main event loop */
 244         while(running && !XNextEvent(dpy, &ev))
 245                 switch (ev.type) {
 246                 case KeyPress:
 247                         kpress(&ev.xkey);
 248                         break;
 249                 case Expose:
 250                         if(ev.xexpose.count == 0)
 251                                 drawinput();
 252                         break;
 253                 case VisibilityNotify:
 254                         if (ev.xvisibility.state != VisibilityUnobscured)
 255                                 XRaiseWindow(dpy, win);
 256                         break;
 257                 }
 258 }
 259
 260 void
 261 setup(Bool topbar) {
 262         int i, j, x, y;
 263 #if XINERAMA
 264         int n;
 265         XineramaScreenInfo *info = NULL;
 266 #endif
 267         XModifierKeymap *modmap;
 268         XSetWindowAttributes wa;
 269         XWindowAttributes pwa;
 270
 271         /* init modifier map */
 272         modmap = XGetModifierMapping(dpy);
 273         for(i = 0; i < 8; i++)
 274                 for(j = 0; j < modmap->max_keypermod; j++) {
 275                         if(modmap->modifiermap[i * modmap->max_keypermod + j]
 276                         == XKeysymToKeycode(dpy, XK_Num_Lock))
 277                                 numlockmask = (1 << i);
 278                 }
 279         XFreeModifiermap(modmap);
 280
 281         /* style */
 282         dc.norm[ColBG] = getcolor(normbgcolor);
 283         dc.norm[ColFG] = getcolor(normfgcolor);
 284         dc.sel[ColBG] = getcolor(selbgcolor);
 285         dc.sel[ColFG] = getcolor(selfgcolor);
 286         initfont(font);
 287
 288         /* menu window */
 289         wa.override_redirect = True;
 290         wa.background_pixmap = ParentRelative;
 291         wa.event_mask = ExposureMask | ButtonPressMask | KeyPressMask | VisibilityChangeMask;
 292
 293         /* menu window geometry */
 294         mh = (dc.font.height + 2);
 295 #if XINERAMA
 296         if(parent == RootWindow(dpy, screen) && XineramaIsActive(dpy) && (info = XineramaQueryScreens(dpy, &n))) {
 297                 i = 0;
 298                 if(n > 1) {
 299                         int di;
 300                         unsigned int dui;
 301                         Window dummy;
 302                         if(XQueryPointer(dpy, parent, &dummy, &dummy, &x, &y, &di, &di, &dui))
 303                                 for(i = 0; i < n; i++)
 304                                         if(INRECT(x, y, info[i].x_org, info[i].y_org, info[i].width, info[i].height))
 305                                                 break;
 306                 }
 307                 x = info[i].x_org;
 308                 y = topbar ? info[i].y_org : info[i].y_org + info[i].height - mh;
 309                 mw = info[i].width;
 310                 XFree(info);
 311         }
 312         else
 313 #endif
 314         {
 315                 XGetWindowAttributes(dpy, parent, &pwa);
 316                 x = 0;
 317                 y = topbar ? 0 : pwa.height - mh;
 318                 mw = pwa.width;
 319         }
 320
 321         win = XCreateWindow(dpy, parent, x, y, mw, mh, 0,
 322                         DefaultDepth(dpy, screen), CopyFromParent,
 323                         DefaultVisual(dpy, screen),
 324                         CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
 325
 326         /* pixmap */
 327         dcsetup();
 328         if(prompt)
 329                 promptw = MIN(textw(prompt), mw / 5);
 330         cursor = strlen(text);
 331         XMapRaised(dpy, win);
 332 }
 333
 334 int
 335 main(int argc, char *argv[]) {
 336         unsigned int i;
 337         Bool topbar = True;
 338
 339         /* command line args */
 340         for(i = 1; i < argc; i++)
 341                 if(!strcmp(argv[i], "-b"))
 342                         topbar = False;
 343                 else if(!strcmp(argv[i], "-e")) {
 344                         if(++i < argc) parent = atoi(argv[i]);
 345                 }
 346                 else if(!strcmp(argv[i], "-fn")) {
 347                         if(++i < argc) font = argv[i];
 348                 }
 349                 else if(!strcmp(argv[i], "-nb")) {
 350                         if(++i < argc) normbgcolor = argv[i];
 351                 }
 352                 else if(!strcmp(argv[i], "-nf")) {
 353                         if(++i < argc) normfgcolor = argv[i];
 354                 }
 355                 else if(!strcmp(argv[i], "-p")) {
 356                         if(++i < argc) prompt = argv[i];
 357                 }
 358                 else if(!strcmp(argv[i], "-sb")) {
 359                         if(++i < argc) selbgcolor = argv[i];
 360                 }
 361                 else if(!strcmp(argv[i], "-sf")) {
 362                         if(++i < argc) selfgcolor = argv[i];
 363                 }
 364                 else if(!strcmp(argv[i], "-v"))
 365                         eprint("dinput-"VERSION", © 2006-2010 dinput engineers, see LICENSE for details\n");
 366                 else if(!*text)
 367                         strncpy(text, argv[i], sizeof text);
 368                 else
 369                         eprint("usage: dinput [-b] [-e <xid>] [-fn <font>] [-nb <color>] [-nf <color>]\n"
 370                                "              [-p <prompt>] [-sb <color>] [-sf <color>] [-v] [<text>]\n");
 371         if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
 372                 fprintf(stderr, "dinput: warning: no locale support\n");
 373         if(!(dpy = XOpenDisplay(NULL)))
 374                 eprint("dinput: cannot open display\n");
 375         screen = DefaultScreen(dpy);
 376         if(!parent)
 377                 parent = RootWindow(dpy, screen);
 378
 379         running = grabkeyboard();
 380         setup(topbar);
 381         drawinput();
 382         XSync(dpy, False);
 383         run();
 384         cleanup();
 385         XCloseDisplay(dpy);
 386         return ret;
 387 }