mdw@git.distorted.org.uk Git - xtoys/blob - xgetline.c

   1 /* -*-c-*-
   2  *
   3  * $Id: xgetline.c,v 1.8 1998/12/16 19:58:53 mdw Exp $
   4  *
   5  * Fetch a line of text from the user
   6  *
   7  * (c) 1998 Straylight/Edgeware
   8  */
   9
  10 /*----- Licensing notice --------------------------------------------------*
  11  *
  12  * This file is part of the Edgeware X tools collection.
  13  *
  14  * X tools is free software; you can redistribute it and/or modify
  15  * it under the terms of the GNU General Public License as published by
  16  * the Free Software Foundation; either version 2 of the License, or
  17  * (at your option) any later version.
  18  *
  19  * X tools is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  * GNU General Public License for more details.
  23  *
  24  * You should have received a copy of the GNU General Public License
  25  * along with X tools; if not, write to the Free Software Foundation,
  26  * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  27  */
  28
  29 /*----- Revision history --------------------------------------------------*
  30  *
  31  * $Log: xgetline.c,v $
  32  * Revision 1.8  1998/12/16 19:58:53  mdw
  33  * Stop the dropdown list from dropping down when you press enter.
  34  *
  35  * Revision 1.7  1998/12/11 09:53:02  mdw
  36  * Updates for mLib/mgLib.  Support history files for recalling past
  37  * entries, using a drop-down list.
  38  *
  39  * Revision 1.6  1998/12/03 00:56:29  mdw
  40  * Set focus on the entry field, rather than leaving things to luck.
  41  *
  42  * Revision 1.5  1998/12/03 00:39:44  mdw
  43  * Force focus when starting up.
  44  *
  45  * Revision 1.4  1998/11/30 22:36:47  mdw
  46  * Tidy up tabbing in help texts very slightly.
  47  *
  48  * Revision 1.3  1998/11/21 22:30:20  mdw
  49  * Support GNU-style long options throughout, and introduce proper help
  50  * text to all programs.  Update manual pages to match.
  51  *
  52  * Revision 1.2  1998/11/18 21:25:30  mdw
  53  * Remove bogus `-h' option from the options list.
  54  *
  55  * Revision 1.1  1998/11/16 23:00:49  mdw
  56  * Initial versions.
  57  *
  58  */
  59
  60 /*----- Header files ------------------------------------------------------*/
  61
  62 #include <stdio.h>
  63 #include <stdlib.h>
  64 #include <string.h>
  65
  66 #include <fcntl.h>
  67 #include <unistd.h>
  68
  69 #include <gtk/gtk.h>
  70 #include <gdk/gdkkeysyms.h>
  71
  72 #include <mLib/alloc.h>
  73 #include <mLib/dstr.h>
  74 #include <mLib/mdwopt.h>
  75 #include <mLib/report.h>
  76 #include <mLib/quis.h>
  77
  78 #include <mgLib/cancel.h>
  79 #include <mgLib/mdwfocus.h>
  80
  81 /*----- Main code ---------------------------------------------------------*/
  82
  83 /* --- @quit@ --- *
  84  *
  85  * Arguments:   @GtkWidget *w@ = widget raising the signal
  86  *              @gpointer *p@ = pointer to integer result code
  87  *
  88  * Returns:     ---
  89  *
  90  * Use:         Sets the result code to zero (failure) and ends the loop.
  91  */
  92
  93 static void quit(GtkWidget *w, gpointer *p)
  94 {
  95   int *ip = (int *)p;
  96   *ip = 0;
  97   gtk_main_quit();
  98 }
  99
 100 /* --- @done@ --- *
 101  *
 102  * Arguments:   @GtkWidget *w@ = widget raising the signal
 103  *              @gpointer *p@ = pointer to integer result code
 104  *
 105  * Returns:     ---
 106  *
 107  * Use:         Sets the result code nonzero (success) and ends the loop.
 108  */
 109
 110 static void done(GtkWidget *w, gpointer *p)
 111 {
 112   int *ip = (int *)p;
 113   *ip = 1;
 114   gtk_main_quit();
 115 }
 116
 117 /* --- @version@ --- *
 118  *
 119  * Arguments:   @FILE *fp@ = output stream to print the message on
 120  *
 121  * Returns:     ---
 122  *
 123  * Use:         Spits out a version message.
 124  */
 125
 126 static void version(FILE *fp)
 127 {
 128   fprintf(fp, "%s (xtoys version " VERSION ")\n", QUIS);
 129 }
 130
 131 /* --- @usage@ --- *
 132  *
 133  * Arguments:   @FILE *fp@ = output stream to print the message on
 134  *
 135  * Returns:     ---
 136  *
 137  * Use:         Spits out a usage message.
 138  */
 139
 140 static void usage(FILE *fp)
 141 {
 142   fprintf(fp,
 143           "Usage: %s [-in] [-t title] [-p prompt] [-d default]\n"
 144           "\t[-l|-H file] [-m max]\n",
 145           QUIS);
 146 }
 147
 148 /* --- @main@ --- *
 149  *
 150  * Arguments:   @int argc@ = number of command line arguments
 151  *              @char *argv[]@ = addresses of arguments
 152  *
 153  * Returns:     Zero if OK, and we read a string; nonzero if the user
 154  *              cancelled.
 155  *
 156  * Use:         Reads a string from the user, and returns it on standard
 157  *              output.
 158  */
 159
 160 int main(int argc, char *argv[])
 161 {
 162   /* --- Configuration variables --- */
 163
 164   char *prompt = 0;
 165   char *dfl = "";
 166   char *title = "Input request";
 167   int left;
 168   unsigned f = 0;
 169   int ok = 0;
 170
 171   const char *list = 0;
 172   int histmax = 20;
 173   GList *hist;
 174
 175   enum {
 176     f_invis = 1,
 177     f_duff = 2,
 178     f_history = 4,
 179     f_nochoice = 8
 180   };
 181
 182   /* --- User interface bits --- */
 183
 184   GtkWidget *win;
 185   GtkWidget *box;
 186   GtkWidget *entry;
 187   GtkWidget *btn;
 188
 189   /* --- Crank up the toolkit --- *
 190    *
 191    * Have to do this here: GTK snarfs some command line options which my
 192    * parser would barf about.
 193    */
 194
 195   ego(argv[0]);
 196   gtk_init(&argc, &argv);
 197
 198   /* --- Parse options from command line --- */
 199
 200   for (;;) {
 201
 202     /* --- Long options structure --- */
 203
 204     static struct option opt[] = {
 205       { "help",         0,                      0,      'h' },
 206       { "usage",        0,                      0,      'u' },
 207       { "version",      0,                      0,      'v' },
 208       { "title",        required_argument,      0,      't' },
 209       { "prompt",       required_argument,      0,      'p' },
 210       { "default",      required_argument,      0,      'd' },
 211       { "password",     0,                      0,      'i' },
 212       { "invisible",    0,                      0,      'i' },
 213       { "history",      required_argument,      0,      'H' },
 214       { "list",         required_argument,      0,      'l' },
 215       { "histmax",      required_argument,      0,      'm' },
 216       { "no-choice",    0,                      0,      'n' },
 217       { 0,              0,                      0,      0 }
 218     };
 219     int i;
 220
 221     /* --- Fetch an option --- */
 222
 223     i = getopt_long(argc, argv, "huv t:p:d:i H:l:m:n", opt, 0);
 224     if (i < 0)
 225       break;
 226
 227     /* --- Work out what to do with it --- */
 228
 229     switch (i) {
 230       case 'h':
 231         version(stdout);
 232         fputs("\n", stdout);
 233         usage(stdout);
 234         fputs(
 235 "\n"
 236 "Pops up a small window requesting input from a user, and echoes the\n"
 237 "response to stdout, where it can be collected by a shell script.\n"
 238 "\n"
 239 "Options available are:\n"
 240 "\n"
 241 "-h, --help             Display this help text\n"
 242 "-u, --usage            Display a short usage summary\n"
 243 "-v, --version          Display the program's version number\n"
 244 "\n"
 245 "-i, --invisible\t      Don't show the user's string as it's typed\n"
 246 "-t, --title=TITLE      Set the window's title string\n"
 247 "-p, --prompt=PROMPT    Set the window's prompt string\n"
 248 "-d, --default=DEFAULT  Set the default string already in the window\n"
 249 "\n"
 250 "-l, --list=FILE        Read FILE into a drop-down list\n"
 251 "-n, --no-choice        No free text input: must choose item from list\n"
 252 "-H, --history=FILE     As for `--list', but update with new string\n"
 253 "-m, --histmax=MAX      Maximum number of items written back to file\n",
 254           stdout);
 255         exit(0);
 256         break;
 257       case 'u':
 258         usage(stdout);
 259         exit(0);
 260         break;
 261       case 'v':
 262         version(stdout);
 263         exit(0);
 264         break;
 265
 266       case 't':
 267         title = optarg;
 268         break;
 269       case 'p':
 270         prompt = optarg;
 271         break;
 272       case 'd':
 273         dfl = optarg;
 274         break;
 275       case 'i':
 276         f |= f_invis;
 277         break;
 278
 279       case 'l':
 280         list = optarg;
 281         break;
 282       case 'n':
 283         f |= f_nochoice;
 284         break;
 285       case 'H':
 286         f |= f_history;
 287         list = optarg;
 288         break;
 289       case 'm':
 290         histmax = atoi(optarg);
 291         break;
 292
 293       default:
 294         f |= f_duff;
 295         break;
 296     }
 297   }
 298
 299   if (f & f_duff) {
 300     usage(stderr);
 301     exit(EXIT_FAILURE);
 302   }
 303
 304   if ((f & f_invis) && list) {
 305     die(EXIT_FAILURE,
 306         "invisible entry is dumb if you provide a list of alternatives!");
 307   }
 308
 309   if ((f & f_nochoice) && !list)
 310     die(EXIT_FAILURE, "nothing to restrict choice to!");
 311
 312   /* --- Create the main window --- */
 313
 314   win = gtk_window_new(GTK_WINDOW_TOPLEVEL);
 315   gtk_window_set_title(GTK_WINDOW(win), title);
 316   gtk_window_position(GTK_WINDOW(win), GTK_WIN_POS_MOUSE);
 317   gtk_signal_connect(GTK_OBJECT(win), "destroy",
 318                      GTK_SIGNAL_FUNC(quit), &ok);
 319
 320   /* --- Create the box for laying out the widgets inside --- */
 321
 322   left = (prompt ? 1 : 0);
 323   box = gtk_table_new(left + 2, 1, 0);
 324
 325   /* --- Maybe create a prompt widget --- */
 326
 327   if (prompt) {
 328     GtkWidget *w = gtk_label_new(prompt);
 329     gtk_table_attach(GTK_TABLE(box), w,
 330                      0, 1, 0, 1, 0, GTK_EXPAND, 4, 2);
 331     gtk_widget_show(w);
 332   }
 333
 334   /* --- Create the entry widget --- */
 335
 336   if (list) {
 337     FILE *fp = fopen(list, "r");
 338     GtkWidget *combo;
 339
 340     /* --- Read the items in from the file --- *
 341      *
 342      * Inability to open the file is not a disaster.
 343      */
 344
 345     hist = 0;
 346     if (fp) {
 347       dstr d;
 348
 349       dstr_create(&d);
 350       while (dstr_putline(&d, fp) != EOF) {
 351         hist = g_list_append(hist, xstrdup(d.buf));
 352         dstr_destroy(&d);
 353       }
 354       fclose(fp);
 355     }
 356
 357     /* --- Now create a combo box --- */
 358
 359     combo = gtk_combo_new();
 360     entry = GTK_COMBO(combo)->entry;
 361     if (hist)
 362       gtk_combo_set_popdown_strings(GTK_COMBO(combo), hist);
 363
 364     /* --- Do other configuring --- */
 365
 366     if (f & f_nochoice) {
 367       gtk_combo_set_value_in_list(GTK_COMBO(combo), 1, 0);
 368       gtk_entry_set_editable(GTK_ENTRY(entry), 0);
 369     }
 370     gtk_combo_set_case_sensitive(GTK_COMBO(combo), 1);
 371     gtk_combo_set_use_arrows_always(GTK_COMBO(combo), 1);
 372     gtk_combo_disable_activate(GTK_COMBO(combo));
 373     if (strcmp(dfl, "@") == 0)
 374       gtk_entry_set_text(GTK_ENTRY(entry), hist ? (char *)hist->data : "");
 375     else
 376       gtk_entry_set_text(GTK_ENTRY(entry), dfl);
 377
 378     /* --- Set the widget in the right place and show it --- */
 379
 380     gtk_table_attach(GTK_TABLE(box), combo,
 381                      left, left + 1, 0, 1,
 382                      GTK_EXPAND | GTK_FILL, GTK_EXPAND, 4, 2);
 383     gtk_widget_show(combo);
 384   } else {
 385     entry = gtk_entry_new();
 386     gtk_entry_set_text(GTK_ENTRY(entry), dfl);
 387     if (f & f_invis)
 388       gtk_entry_set_visibility(GTK_ENTRY(entry), FALSE);
 389     gtk_table_attach(GTK_TABLE(box), entry,
 390                      left, left + 1, 0, 1,
 391                      GTK_EXPAND | GTK_FILL, GTK_EXPAND, 4, 2);
 392     gtk_widget_show(entry);
 393   }
 394
 395   /* --- Create the default action widget --- */
 396
 397   btn = gtk_button_new_with_label("OK");
 398   gtk_table_attach(GTK_TABLE(box), btn,
 399                    left + 1, left + 2, 0, 1, 0, GTK_EXPAND, 2, 2);
 400   GTK_WIDGET_SET_FLAGS(btn, GTK_CAN_DEFAULT);
 401   gtk_widget_show(btn);
 402
 403   /* --- Add the box into the main window --- */
 404
 405   gtk_container_add(GTK_CONTAINER(win), box);
 406   gtk_widget_show(box);
 407
 408   /* --- Last minute configuration things --- */
 409
 410   gtk_widget_grab_default(btn);
 411   gtk_signal_connect(GTK_OBJECT(btn), "clicked",
 412                      GTK_SIGNAL_FUNC(done), &ok);
 413   gtk_signal_connect_object(GTK_OBJECT(entry), "activate",
 414                             GTK_SIGNAL_FUNC(gtk_widget_activate),
 415                             GTK_OBJECT(btn));
 416   cancel(GTK_WINDOW(win), 0);
 417
 418   /* --- Go go go --- */
 419
 420   gtk_widget_realize(win);
 421   mdwfocus(win);
 422   gtk_widget_grab_focus(entry);
 423   gtk_widget_show(win);
 424   gtk_main();
 425
 426   /* --- Output the result --- */
 427
 428   if (ok) {
 429     char *p = gtk_entry_get_text(GTK_ENTRY(entry));
 430
 431     /* --- If history is enabled, output a new history file --- *
 432      *
 433      * If the first entry was accepted verbatim, don't bother.
 434      */
 435
 436     if (f & f_history && !(hist && strcmp(p, hist->data) == 0)) {
 437       int fd;
 438       FILE *fp;
 439       int i;
 440       GList *g;
 441
 442       if ((fd = open(list, O_WRONLY | O_CREAT | O_TRUNC, 0600)) < 0)
 443         goto fail;
 444       if ((fp = fdopen(fd, "w")) == 0) {
 445         close(fd);
 446         goto fail;
 447       }
 448
 449       fputs(p, fp);
 450       fputc('\n', fp);
 451
 452       for (i = 1, g = hist; (histmax < 1 || i < histmax) && g; g = g->next) {
 453         if (strcmp(g->data, p) != 0) {
 454           fputs(g->data, fp);
 455           fputc('\n', fp);
 456           i++;
 457         }
 458       }
 459       fclose(fp);
 460     fail:;
 461     }
 462
 463     /* --- Print the result and go away --- */
 464
 465     puts(p);
 466   }
 467
 468   return (ok ? EXIT_SUCCESS : EXIT_FAILURE);
 469 }
 470
 471 /*----- That's all, folks -------------------------------------------------*/