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