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