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