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 <unistd.h>
   9 #include <X11/keysym.h>
  10 #include <X11/Xlib.h>
  11 #include <X11/Xutil.h>
  12 #ifdef XINERAMA
  13 #include <X11/extensions/Xinerama.h>
  14 #endif
  15
  16 /* macros */
  17 #define CLEANMASK(mask)         (mask & ~(numlockmask | LockMask))
  18 #define INRECT(X,Y,RX,RY,RW,RH) ((X) >= (RX) && (X) < (RX) + (RW) && (Y) >= (RY) && (Y) < (RY) + (RH))
  19 #define MIN(a, b)               ((a) < (b) ? (a) : (b))
  20 #define MAX(a, b)               ((a) > (b) ? (a) : (b))
  21 #define IS_UTF8_1ST_CHAR(c)     ((((c) & 0xc0) == 0xc0) || !((c) & 0x80))
  22
  23 /* forward declarations */
  24 static void cleanup(void);
  25 static void drawcursor(void);
  26 static void drawinput(void);
  27 static Bool grabkeyboard(void);
  28 static void kpress(XKeyEvent *e);
  29 static void run(void);
  30 static void setup(Bool topbar);
  31
  32 #include "config.h"
  33 #include "draw.h"
  34
  35 /* variables */
  36 static char *prompt = NULL;
  37 static char text[4096];
  38 static int promptw = 0;
  39 static int ret = 0;
  40 static int screen;
  41 static unsigned int cursor = 0;
  42 static unsigned int numlockmask = 0;
  43 static unsigned int mw, mh;
  44 static unsigned long normcol[ColLast];
  45 static unsigned long selcol[ColLast];
  46 static Bool running = True;
  47 static DC dc;
  48 static Display *dpy;
  49 static Window win, parent;
  50
  51 void
  52 cleanup(void) {
  53         cleanupdraw(&dc);
  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(&dc, text, cursor) + dc.font.height / 2;
  63
  64         XSetForeground(dpy, dc.gc, normcol[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(&dc, NULL, normcol, False);
  76         /* print prompt? */
  77         if(prompt) {
  78                 dc.w = promptw;
  79                 drawtext(&dc, prompt, selcol, False);
  80                 dc.x += dc.w;
  81         }
  82         dc.w = mw - dc.x;
  83         drawtext(&dc, *text ? text : NULL, normcol, False);
  84         drawcursor();
  85         XCopyArea(dpy, dc.drawable, win, dc.gc, 0, 0, mw, mh, 0, 0);
  86         XFlush(dpy);
  87 }
  88
  89 Bool
  90 grabkeyboard(void) {
  91         unsigned int len;
  92
  93         for(len = 1000; len; len--) {
  94                 if(XGrabKeyboard(dpy, parent, True, GrabModeAsync, GrabModeAsync, CurrentTime)
  95                 == GrabSuccess)
  96                         break;
  97                 usleep(1000);
  98         }
  99         return len > 0;
 100 }
 101
 102 void
 103 kpress(XKeyEvent *e) {
 104         char buf[sizeof text];
 105         int num;
 106         unsigned int i, len;
 107         KeySym ksym;
 108
 109         len = strlen(text);
 110         num = XLookupString(e, buf, sizeof buf, &ksym, NULL);
 111         if(ksym == XK_KP_Enter)
 112                 ksym = XK_Return;
 113         else if(ksym >= XK_KP_0 && ksym <= XK_KP_9)
 114                 ksym = (ksym - XK_KP_0) + XK_0;
 115         else if(IsFunctionKey(ksym) || IsKeypadKey(ksym)
 116         || IsMiscFunctionKey(ksym) || IsPFKey(ksym)
 117         || IsPrivateKeypadKey(ksym))
 118                 return;
 119         /* first check if a control mask is omitted */
 120         if(e->state & ControlMask) {
 121                 switch(tolower(ksym)) {
 122                 default:
 123                         return;
 124                 case XK_a:
 125                         ksym = XK_Home;
 126                         break;
 127                 case XK_b:
 128                         ksym = XK_Left;
 129                         break;
 130                 case XK_c:
 131                         ksym = XK_Escape;
 132                         break;
 133                 case XK_e:
 134                         ksym = XK_End;
 135                         break;
 136                 case XK_f:
 137                         ksym = XK_Right;
 138                         break;
 139                 case XK_h:
 140                         ksym = XK_BackSpace;
 141                         break;
 142                 case XK_j:
 143                 case XK_m:
 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("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         dc.dpy = dpy;
 273         normcol[ColBG] = getcolor(&dc, normbgcolor);
 274         normcol[ColFG] = getcolor(&dc, normfgcolor);
 275         selcol[ColBG] = getcolor(&dc, selbgcolor);
 276         selcol[ColFG] = getcolor(&dc, selfgcolor);
 277         initfont(&dc, font);
 278
 279         /* input window */
 280         wa.override_redirect = True;
 281         wa.background_pixmap = ParentRelative;
 282         wa.event_mask = ExposureMask | KeyPressMask | VisibilityChangeMask;
 283
 284         /* input window geometry */
 285         mh = dc.font.height + 2;
 286 #if XINERAMA
 287         if(parent == RootWindow(dpy, screen) && XineramaIsActive(dpy) && (info = XineramaQueryScreens(dpy, &n))) {
 288                 i = 0;
 289                 if(n > 1) {
 290                         int di;
 291                         unsigned int dui;
 292                         Window dummy;
 293                         if(XQueryPointer(dpy, parent, &dummy, &dummy, &x, &y, &di, &di, &dui))
 294                                 for(i = 0; i < n; i++)
 295                                         if(INRECT(x, y, info[i].x_org, info[i].y_org, info[i].width, info[i].height))
 296                                                 break;
 297                 }
 298                 x = info[i].x_org;
 299                 y = topbar ? info[i].y_org : info[i].y_org + info[i].height - mh;
 300                 mw = info[i].width;
 301                 XFree(info);
 302         }
 303         else
 304 #endif
 305         {
 306                 XGetWindowAttributes(dpy, parent, &pwa);
 307                 x = 0;
 308                 y = topbar ? 0 : pwa.height - mh;
 309                 mw = pwa.width;
 310         }
 311
 312         win = XCreateWindow(dpy, parent, x, y, mw, mh, 0,
 313                         DefaultDepth(dpy, screen), CopyFromParent,
 314                         DefaultVisual(dpy, screen),
 315                         CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
 316
 317         setupdraw(&dc, win);
 318         if(prompt)
 319                 promptw = MIN(textw(&dc, prompt), mw / 5);
 320         cursor = strlen(text);
 321         XMapRaised(dpy, win);
 322 }
 323
 324 int
 325 main(int argc, char *argv[]) {
 326         unsigned int i;
 327         Bool topbar = True;
 328
 329         /* command line args */
 330         progname = argv[0];
 331         for(i = 1; i < argc; i++)
 332                 if(!strcmp(argv[i], "-b"))
 333                         topbar = False;
 334                 else if(!strcmp(argv[i], "-e")) {
 335                         if(++i < argc) parent = atoi(argv[i]);
 336                 }
 337                 else if(!strcmp(argv[i], "-fn")) {
 338                         if(++i < argc) font = argv[i];
 339                 }
 340                 else if(!strcmp(argv[i], "-nb")) {
 341                         if(++i < argc) normbgcolor = argv[i];
 342                 }
 343                 else if(!strcmp(argv[i], "-nf")) {
 344                         if(++i < argc) normfgcolor = argv[i];
 345                 }
 346                 else if(!strcmp(argv[i], "-p")) {
 347                         if(++i < argc) prompt = argv[i];
 348                 }
 349                 else if(!strcmp(argv[i], "-sb")) {
 350                         if(++i < argc) selbgcolor = argv[i];
 351                 }
 352                 else if(!strcmp(argv[i], "-sf")) {
 353                         if(++i < argc) selfgcolor = argv[i];
 354                 }
 355                 else if(!strcmp(argv[i], "-v"))
 356                         eprint("dinput-"VERSION", © 2006-2010 dinput engineers, see LICENSE for details\n");
 357                 else if(!*text)
 358                         strncpy(text, argv[i], sizeof text);
 359                 else
 360                         eprint("usage: dinput [-b] [-e <xid>] [-fn <font>] [-nb <color>] [-nf <color>]\n"
 361                                "              [-p <prompt>] [-sb <color>] [-sf <color>] [-v] [<text>]\n");
 362         if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
 363                 fprintf(stderr, "dinput: warning: no locale support\n");
 364         if(!(dpy = XOpenDisplay(NULL)))
 365                 eprint("cannot open display\n");
 366         screen = DefaultScreen(dpy);
 367         if(!parent)
 368                 parent = RootWindow(dpy, screen);
 369
 370         running = grabkeyboard();
 371         setup(topbar);
 372         drawinput();
 373         XSync(dpy, False);
 374         run();
 375         cleanup();
 376         XCloseDisplay(dpy);
 377         return ret;
 378 }